EP0976820A1 - Multi-layer detergent tablet for laundry washing and its process of production - Google Patents

Multi-layer detergent tablet for laundry washing and its process of production Download PDF

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Publication number
EP0976820A1
EP0976820A1 EP99420169A EP99420169A EP0976820A1 EP 0976820 A1 EP0976820 A1 EP 0976820A1 EP 99420169 A EP99420169 A EP 99420169A EP 99420169 A EP99420169 A EP 99420169A EP 0976820 A1 EP0976820 A1 EP 0976820A1
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EP
European Patent Office
Prior art keywords
central layer
layer
outer layers
tablet
tablet according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP99420169A
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German (de)
French (fr)
Inventor
Jean-Louis Maitre
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CHIMIOTECHNIC
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CHIMIOTECHNIC
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Publication of EP0976820A1 publication Critical patent/EP0976820A1/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0073—Tablets
    • C11D17/0086—Laundry tablets
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0073—Tablets
    • C11D17/0078—Multilayered tablets
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/38—Products with no well-defined composition, e.g. natural products
    • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3942—Inorganic per-compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3945—Organic per-compounds

Definitions

  • the invention relates to a new detergent tablet for washing linen. It also relates to the method of manufacturing said tablet.
  • Products for washing clothes can come in a variety of forms, solid or liquid. Liquid forms are less and less less used, solid forms being preferred for their bulk minimum and their maximum efficiency.
  • this type of product has the disadvantage of intimately mixing all of the constituents and in particular the peroxidant system and the enzymatic system, which jeopardizes the stability of the product and inevitably leads to a loss of activity.
  • these monolayer tablets contain an anionic surfactant of the sodium alkylbenzene sulfonate type, which can cause, during the manufacture of the pastille of the phenomena of sticking of the powder on the punches of the machine.
  • the problem which the invention proposes to solve is provide a shelf for washing clothes that is stable over time.
  • Another object of the invention is to propose a tablet, the manufacture of which is simple to implement.
  • disintegration we mean the separation operation others of the different components constituting the outer and central layers. We distinguish this disintegration stage, which corresponds to a “coarse” separation particles together, from the subsequent step of dissolving the constituents proper.
  • This sandwich structure therefore makes it possible to solve the problem of product stability during storage by separating the peroxidizing activity from the layer central, that is to say the bleaching activity, the enzymatic activity of outer layers, while allowing rapid action of the central layer after disintegration thereof during the washing operation.
  • the disintegration in a very short time of the central layer allows avoid that all or part of the shelf is fixed on the laundry thus leading to indelible staining due to the presence of the peroxidizing system.
  • the tablet is in the form of at least three flat layers superimposed on each other by compaction of their widest surface. In this way, the disintegration of the apparent periphery of the intermediate layer during disintegration outer layers is very limited.
  • the disintegrating agent is chosen, although the list is not exhaustive, in the group comprising clays, cellulose and its derivatives, polyvinyl pyrrolidone, modified or crosslinkable starch.
  • the disintegrating agent is chosen from the group comprising clays, cellulose and its derivatives, polyvinyl pyrrolidone, modified or crosslinkable starch.
  • said central layer undergoes during manufacture, a low force of precompression.
  • the disintegrating agent represents between 5 and 20% by weight, advantageously 15% by weight of the central layer.
  • the disintegration of said central layer is not sufficient fast and leads to the formation of tablet aggregates.
  • the disintegration time of the central layer as such is between 20 seconds and 75 seconds, while the disintegration time of outer layers is between 30 seconds and 90 seconds.
  • the disintegration time of the outer layers is one minute, while that of the central layer is 30 seconds after complete dissolution of the outer layers.
  • the two outer layers have a composition identical chemical.
  • system enzymatic means a set of enzymes of the protease, amylase type, lipase and cellulase.
  • the outer layers include an anionic and / or nonionic surfactant firstly to wet the fiber and then to take off the dirt by decreasing the surface tension.
  • the nonionic surfactant is distributed between the outer layers and the central layer.
  • the anionic surfactant is chosen from the group comprising sodium alkylbenzene sulfonate, alkylsulfate and alkyl ether sulfate.
  • nonionic surfactant is chosen from the group including ethoxylated fatty alcohols, ethoxylated alkylphenols.
  • outer layers include an anti-scale agent.
  • the anti-scale agent is chosen from the group comprising the phosphonate, silicoaluminate, tripolyphosphate (TPP), homo or copolymers of acrylic acid and citrates.
  • the outer layers include a bleach activator.
  • the bleach activator can be incorporated into the layer. central.
  • the whitening activator is chosen from the group including tetraacetylene diamine (TAED), pentaacetyl glucose (PAG), and tetraacetyl glycoluryl (TAGU).
  • TAED tetraacetylene diamine
  • PAG pentaacetyl glucose
  • TAGU tetraacetyl glycoluryl
  • Said bleach activator thus activates the system peroxidant contained in the central layer, in practice, the perborate or the percarbonate, the reaction leading to the formation of hydrogen peroxide and acid peracetic.
  • the peroxidizing system exercises its bleaching action only after dissolution of the two outer layers.
  • the central layer contains also a perfume.
  • the central layer includes a disinfecting agent in the form of coated granules capable of being released depending on the wash water temperature.
  • the coating of the disinfecting agent is carried out in a known manner by a person skilled in the art, in particular by spraying fat onto the disinfectant particles, such as triglycerides or waxes.
  • the washing tablet may diffuse the disinfectant at a given temperature of the wash water, depending on the coating chosen.
  • the invention also relates to the method of manufacturing said multilayer tablet.
  • the weight of the outer layers is between 10 and 20 grams, preferably between 12 and 17 grams.
  • the weight of the central layer is between 10 and 20 grams, advantageously between 10 and 15 grams.
  • the first outer layer and the central layer are packed to a pre-compression value of between 10 kg / cm 2 and 100 kg / cm 2 , while the tablet obtained is pressed to a value between 20 kg / cm 2 and 400 kg / cm 2 .
  • tablets of 40 g, diameter 45 are manufactured, the hardness is between 4 and 15 kP, advantageously 5 to 7 kP.
  • a mixture 1 is then prepared intended to be mixed with the base atomized to form the outer layers.
  • the atomized base is mixed with the mixture 1.
  • the mixture obtained is separated into two equal parts intended to form the outer layers.
  • the first half is placed on a support, then it is packed by subjecting it to a precompression force of 15 kg / cm 2 .
  • This mixture 2 is deposited on the first outer layer and then packed by subjecting it to a precompression force of 15 kg / m 2 .
  • the mixture intended to form the second outer layer is deposited on the central layer, then the tablet obtained is subjected to a pressure of 60 kg / m 2 .
  • the two outer layers represent 26 g, while the central layer represents 14 g.
  • Example 2 Phosphate-free tablet
  • the tablets are produced according to the same process as in Example 1.
  • the two outer layers represent 26 g and the central layer represents 14 g.
  • the tablet of the invention has strong stability in separating peroxidizing system and enzymatic system.

Abstract

Multilayer washing agent tablets with outer layers containing an enzyme system and a core layer containing a peroxide system and a disintegrating agent. Multilayer washing agent tablets for laundering linen, having a sandwich structure with at least three layers comprising (a) two outer layers containing an enzyme system and (b) an inner core layer containing a peroxide system and a disintegrating agent selected such that the core layer has a disintegration time of less than or equal to 80 seconds after complete disintegration of the two outer layers.

Description

L'invention se rapporte à une nouvelle tablette détergente pour le lavage du linge. Elle concerne également le procédé de fabrication de ladite tablette.The invention relates to a new detergent tablet for washing linen. It also relates to the method of manufacturing said tablet.

Les produits pour le lavage du linge peuvent se présenter sous diverses formes, solides ou liquides. Les formes liquides sont aujourd'hui de moins en moins utilisées, les formes solides étant préférées pour leur encombrement minimum et leur efficacité maximale.Products for washing clothes can come in a variety of forms, solid or liquid. Liquid forms are less and less less used, solid forms being preferred for their bulk minimum and their maximum efficiency.

Ainsi, on a décrit dans le document EP-A-0 846 756, des pastilles se présentant sous la forme d'un noyau central enrobé d'un mélange à base d'agents effervescents et désintégrants. Un inconvénient de ce type de tablette réside en ce que le noyau étant très peu compacté (la pression de pastillage est comprise entre 0,5kN et 1,5kN), il se désintègre facilement lors du stockage ou de sa manipulation.Thus, in document EP-A-0 846 756, pastilles have been described. in the form of a central core coated with a mixture based on agents effervescent and disintegrating. One drawback of this type of tablet is that the core being very little compacted (the tableting pressure is between 0.5kN and 1.5kN), it easily disintegrates during storage or handling.

On a également proposé une tablette monocouche fabriquée à partir d'une base atomisée qui peut être densifiée et granulée, à laquelle on ajoute ensuite les différents constituants nécessaires au lavage, tels que système enzymatique, système de blanchiment. La poudre ainsi obtenue est ensuite pastillée sur des pastilleuses du type rotatif.We have also proposed a single-layer tablet made from a atomized base which can be densified and granulated, to which we then add the different components necessary for washing, such as an enzymatic system, whitening system. The powder thus obtained is then pelletized on rotary type pelleting machines.

Même si on résout le problème de la désintégration de la pastille, ce type de produit présente toutefois l'inconvénient de mêler intimement l'ensemble des constituants et notamment le système peroxydant et le système enzymatique, ce qui met en péril la stabilité du produit et conduit inévitablement à une perte d'activité. Par ailleurs, ces tablettes monocouches contiennent un agent tensioactif anionique du type alkylbenzene sulfonate de soude, lequel peut entraíner, lors de la fabrication de la pastille des phénomènes de collage de la poudre sur les poinçons de la machine.Even if we solve the problem of the disintegration of the pellet, this type of product, however, has the disadvantage of intimately mixing all of the constituents and in particular the peroxidant system and the enzymatic system, which jeopardizes the stability of the product and inevitably leads to a loss of activity. Furthermore, these monolayer tablets contain an anionic surfactant of the sodium alkylbenzene sulfonate type, which can cause, during the manufacture of the pastille of the phenomena of sticking of the powder on the punches of the machine.

En d'autres termes, le problème que se propose de résoudre l'invention est de fournir une tablette pour le lavage du linge qui soit stable dans le temps. In other words, the problem which the invention proposes to solve is provide a shelf for washing clothes that is stable over time.

Un autre but de l'invention est de proposer une tablette dont la fabrication soit simple à mettre en oeuvre.Another object of the invention is to propose a tablet, the manufacture of which is simple to implement.

Pour ce faire, l'invention propose une tablette du type multicouches pour lavage du linge, caractérisée ce qu'elle est constituée d'une structure sandwich comprenant au moins trois couches, respectivement :

  • deux couches externes comprenant un système enzymatique ;
  • une couche centrale comprenant un système peroxydant ;
la couche centrale comprenant en outre au moins un agent désintégrant apte à permettre le délitement de ladite couche en une durée inférieure ou égale à 80 secondes après délitement complet des deux couches externes.To do this, the invention proposes a tablet of the multilayer type for washing clothes, characterized in that it consists of a sandwich structure comprising at least three layers, respectively:
  • two outer layers comprising an enzymatic system;
  • a central layer comprising a peroxidizing system;
the central layer further comprising at least one disintegrating agent capable of allowing the disintegration of said layer in a time less than or equal to 80 seconds after complete disintegration of the two external layers.

Par le terme "délitement", on désigne l'opération de désolidarisation les uns des autres des différents composants constituant les couches externes et centrale. On distingue cette étape de délitement, qui correspond à une séparation "grossière" des particules entre elles, de l'étape ultérieure de dissolution des constituants proprement dite.By the term "disintegration", we mean the separation operation others of the different components constituting the outer and central layers. We distinguish this disintegration stage, which corresponds to a "coarse" separation particles together, from the subsequent step of dissolving the constituents proper.

Cette structure en sandwich permet donc de résoudre le problème de la stabilité du produit lors du stockage en séparant l'activité peroxydante de la couche centrale, c'est-à-dire l'activité de blanchiment, de l'activité enzymatique des couches externes, tout en permettant une action rapide de la couche centrale après délitement de celle-ci pendant l'opération de lavage.This sandwich structure therefore makes it possible to solve the problem of product stability during storage by separating the peroxidizing activity from the layer central, that is to say the bleaching activity, the enzymatic activity of outer layers, while allowing rapid action of the central layer after disintegration thereof during the washing operation.

En effet, le délitement en un temps très court de la couche centrale permet d'éviter que toute ou partie de la tablette ne se fixe sur le linge conduisant ainsi à la formation de taches indélébiles due à la présence du système peroxydant.Indeed, the disintegration in a very short time of the central layer allows avoid that all or part of the shelf is fixed on the laundry thus leading to indelible staining due to the presence of the peroxidizing system.

En outre, la tablette se présente sous forme d'au moins trois couches planes superposées l'une à l'autre par tassement de leur surface la plus large. De la sorte, le délitement de la périphérie apparente de la couche intermédiaire lors du délitement des couches externes est très limité. In addition, the tablet is in the form of at least three flat layers superimposed on each other by compaction of their widest surface. In this way, the disintegration of the apparent periphery of the intermediate layer during disintegration outer layers is very limited.

Pour permettre d'obtenir un temps de délitement de la couche centrale très court, l'agent désintégrant est choisi, bien que la liste ne soit pas exhaustive, dans le groupe comprenant les argiles, la cellulose et ses dérivés, la polyvinyl pyrrolidone, l'amidon modifié ou réticulable.To allow a very long disintegration time of the central layer short, the disintegrating agent is chosen, although the list is not exhaustive, in the group comprising clays, cellulose and its derivatives, polyvinyl pyrrolidone, modified or crosslinkable starch.

Pour permettre d'obtenir un temps de délitement de la couche centrale très court, l'agent désintégrant est choisi dans le groupe comprenant les argiles, la cellulose et ses dérivés, le polyvinyl pyrrolidone, l'amidon modifié ou réticulable.To allow a very long disintegration time of the central layer short, the disintegrating agent is chosen from the group comprising clays, cellulose and its derivatives, polyvinyl pyrrolidone, modified or crosslinkable starch.

Pour abaisser davantage encore le temps de délitement de la couche centrale, ladite couche centrale subit lors de la fabrication, une faible force de précompression.To further reduce the layer disintegration time central, said central layer undergoes during manufacture, a low force of precompression.

En pratique, l'agent désintégrant représente entre 5 et 20 % en poids, avantageusement 15 % en poids de la couche centrale.In practice, the disintegrating agent represents between 5 and 20% by weight, advantageously 15% by weight of the central layer.

Pour une proportion d'agent désintégrant inférieure à 5 % en poids de la couche centrale, le délitement de ladite couche centrale n'est pas suffisamment rapide et conduit à la formation d'agrégats de tablettes.For a proportion of disintegrating agent less than 5% by weight of the central layer, the disintegration of said central layer is not sufficient fast and leads to the formation of tablet aggregates.

Au contraire, pour une proportion d'agent désintégrant supérieure à 20 %, la formulation devient économiquement moins intéressante.On the contrary, for a proportion of disintegrating agent greater than 20%, the formulation becomes economically less attractive.

En pratique, le temps de délitement de la couche centrale en tant que tel est compris entre 20 secondes et 75 secondes, tandis que le temps de délitement des couches externes est compris entre 30 secondes et 90 secondes.In practice, the disintegration time of the central layer as such is between 20 seconds and 75 seconds, while the disintegration time of outer layers is between 30 seconds and 90 seconds.

Selon un mode de réalisation de l'invention préféré, le temps de délitement des couches externes est de une minute, tandis que celui de la couche centrale est de 30 secondes après dissolution complète des couches externes.According to an embodiment of the preferred invention, the disintegration time of the outer layers is one minute, while that of the central layer is 30 seconds after complete dissolution of the outer layers.

Par ailleurs, pour obtenir une tablette présentant une structure uniforme et simplifier le procédé de fabrication, les deux couches externes ont une composition chimique identique. Furthermore, to obtain a tablet having a uniform structure and simplify the manufacturing process, the two outer layers have a composition identical chemical.

Dans la suite de la description et dans les revendications, par « système enzymatique », on désigne un ensemble d'enzymes du type protéase, amylase, lipase et cellulase.In the following description and in the claims, by "system enzymatic "means a set of enzymes of the protease, amylase type, lipase and cellulase.

Par ailleurs, pour obtenir une action immédiate de la lessive sur le linge, les couches externes comprennent un agent tensioactif anionique et ou non ionique permettant tout d'abord de mouiller la fibre puis ensuite de décoller les salissures en diminuant la tension superficielle.In addition, to obtain immediate action of the detergent on the laundry, the outer layers include an anionic and / or nonionic surfactant firstly to wet the fiber and then to take off the dirt by decreasing the surface tension.

Toutefois et selon une autre caractéristique de l'invention, pour supprimer les phénomènes de collage de la poudre sur la machine lors de la fabrication des pastilles, l'agent tensioactif non ionique est réparti entre les couches externes et la couche centrale.However and according to another characteristic of the invention, to remove the phenomena of sticking of the powder on the machine during the manufacture of tablets, the nonionic surfactant is distributed between the outer layers and the central layer.

Avantageusement, l'agent tensioactif anionique est choisi dans le groupe comprenant l'alkylbenzène sulfonate de soude, l'alkylsulfate et l'alkyl ether sulfate.Advantageously, the anionic surfactant is chosen from the group comprising sodium alkylbenzene sulfonate, alkylsulfate and alkyl ether sulfate.

De même, l'agent tensio-actif non ionique est choisi dans le groupe comprenant les alcools gras éthoxylés, les alkylphénols éthoxylés.Likewise, the nonionic surfactant is chosen from the group including ethoxylated fatty alcohols, ethoxylated alkylphenols.

Par ailleurs, pour améliorer l'efficacité du lavage et adoucir l'eau, les couches externes comprennent un agent anticalcaire.In addition, to improve washing efficiency and soften the water, outer layers include an anti-scale agent.

En pratique, l'agent anticalcaire est choisi dans le groupe comprenant le phosphonate, le silicoaluminate, le tripolyphosphate (TPP), les homo ou copolymères de l'acide acrylique et les citrates.In practice, the anti-scale agent is chosen from the group comprising the phosphonate, silicoaluminate, tripolyphosphate (TPP), homo or copolymers of acrylic acid and citrates.

Enfin, de sorte à activer le système peroxydant de la couche centrale, et ainsi mettre en oeuvre l'activité de blanchiment, les couches externes comprennent un activateur de blanchiment.Finally, so as to activate the peroxidizing system of the central layer, and thus implement the bleaching activity, the outer layers include a bleach activator.

Toutefois, l'activateur de blanchiment peut être incorporé dans la couche centrale. However, the bleach activator can be incorporated into the layer. central.

En pratique, l'activateur de blanchiment est choisi dans le groupe comprenant le tétraacétylène diamine (TAED), le pentaacétyle glucose (PAG), et le tétraacétyl glycoluryl (TAGU).In practice, the whitening activator is chosen from the group including tetraacetylene diamine (TAED), pentaacetyl glucose (PAG), and tetraacetyl glycoluryl (TAGU).

Ledit activateur de blanchiment permet ainsi d'activer le système peroxydant contenu dans la couche centrale, en pratique, le perborate ou le percarbonate, la réaction conduisant à la formation d'eau oxygénée et d'acide peracétique. Bien entendu et comme déjà dit, le système peroxydant exerce son action de blanchiment seulement après dissolution des deux couches externes.Said bleach activator thus activates the system peroxidant contained in the central layer, in practice, the perborate or the percarbonate, the reaction leading to the formation of hydrogen peroxide and acid peracetic. Of course and as already said, the peroxidizing system exercises its bleaching action only after dissolution of the two outer layers.

Pour conférer au linge une odeur agréable, la couche centrale contient également un parfum.To give the laundry a pleasant smell, the central layer contains also a perfume.

Avantageusement, afin de conférer à la pastille de lavage des propriétés antiseptiques et assainissantes, la couche centrale comprend un agent désinfectant se présentant sous forme de granules enrobés aptes à être libérés en fonction de la température de l'eau de lavage.Advantageously, in order to give the washing tablet properties antiseptic and sanitizing, the central layer includes a disinfecting agent in the form of coated granules capable of being released depending on the wash water temperature.

L'enrobage de l'agent désinfectant est effectué de façon connu par l'homme du métier, notamment par pulvérisation de matière grasse sur les particules d'agent désinfectant, telle que triglycérides ou cires.The coating of the disinfecting agent is carried out in a known manner by a person skilled in the art, in particular by spraying fat onto the disinfectant particles, such as triglycerides or waxes.

Ainsi, pour certains types de lavages, la pastille de lavage pourra diffuser l'agent désinfectant à une température donnée de l'eau de lavage, en fonction de l'enrobage choisi.Thus, for certain types of washing, the washing tablet may diffuse the disinfectant at a given temperature of the wash water, depending on the coating chosen.

L'invention se rapporte également au procédé de fabrication de ladite tablette multicouches.The invention also relates to the method of manufacturing said multilayer tablet.

Selon ce procédé :

  • on mélange tout d'abord les différents constituants formant les couches externes ;
  • parallèlement, on mélange les différents constituants formant la couche centrale ;
  • on dépose sur un support puis on tasse partie du mélange destinée à former la première couche externe,
  • on dépose ensuite sur ladite première couche externe le mélange formant la couche centrale puis on tasse le complexe obtenu ;
  • puis on dépose sur la couche centrale la partie restante du mélange formant la seconde couche externe,
  • enfin, on presse la tablette obtenue.
According to this process:
  • firstly the various constituents forming the outer layers are mixed;
  • in parallel, the various constituents forming the central layer are mixed;
  • it is deposited on a support and then cup part of the mixture intended to form the first outer layer,
  • the mixture forming the central layer is then deposited on said first outer layer and then the complex obtained is packed;
  • then the remaining part of the mixture forming the second outer layer is deposited on the central layer,
  • finally, the tablet obtained is pressed.

En pratique, le poids des couches externes est compris entre 10 et 20 grammes, avantageusement entre 12 et 17 grammes. De même, le poids de la couche centrale est compris entre 10 et 20 grammes, avantageusement entre 10 et 15 grammes.In practice, the weight of the outer layers is between 10 and 20 grams, preferably between 12 and 17 grams. Similarly, the weight of the central layer is between 10 and 20 grams, advantageously between 10 and 15 grams.

De plus, selon une caractéristique essentielle du procédé, on tasse la première couche externe et la couche centrale à une valeur de précompression comprise entre 10 kg/cm2 et 100 kg/cm2, tandis que la tablette obtenue est pressée à une valeur comprise entre 20 kg/cm2 et 400 kg/cm2.In addition, according to an essential characteristic of the process, the first outer layer and the central layer are packed to a pre-compression value of between 10 kg / cm 2 and 100 kg / cm 2 , while the tablet obtained is pressed to a value between 20 kg / cm 2 and 400 kg / cm 2 .

En pratique, on fabrique des tablettes de 40 g, de diamètre 45, dont la dureté est comprise entre 4 et 15 kP, avantageusement 5 à 7 kP.In practice, tablets of 40 g, diameter 45 are manufactured, the hardness is between 4 and 15 kP, advantageously 5 to 7 kP.

L'invention et les avantages qui en découlent ressortiront mieux des exemples suivants.The invention and the advantages which ensue therefrom will emerge more clearly from the following examples.

Exemple 1 - Préparation d'une tablette multicouches avec phosphateExample 1 Preparation of a Multilayer Phosphate Tablet

Les essais suivants ont été réalisés à l'échelle du laboratoire.The following tests were carried out on a laboratory scale.

Pour fabriquer la tablette détergente pour le lavage du linge de l'invention, on procède comme suit.To manufacture the detergent tablet for washing the laundry of the invention, we proceed as follows.

On prépare tout d'abord une base atomisée, dont chacun des constituants entre dans la composition des couches externes. Cette base atomisée comprend :

  • alkylbenzènesulfonate de sodium   8 g
  • savon de sodium   0,5 g
  • azurants optiques   0,2 g
  • phosphonate   0,3 g
  • copolymère acrylique maléique   1,6 g
  • disilicate de soude   4 g
  • carbonate de sodium   7,5 g
  • sulfate   2,34 g
  • dérivés de cellulose   0,4 g
  • parfum   0,5 g
First of all, an atomized base is prepared, each of the constituents of which is used in the composition of the outer layers. This atomized base includes:
  • sodium alkylbenzenesulfonate 8 g
  • sodium soap 0.5 g
  • 0.2 g optical brighteners
  • phosphonate 0.3 g
  • maleic acrylic copolymer 1.6 g
  • sodium disilicate 4 g
  • sodium carbonate 7.5 g
  • sulfate 2.34 g
  • cellulose derivatives 0.4 g
  • fragrance 0.5 g

On prépare ensuite un mélange 1 destiné à être mélangé avec la base atomisée pour former les couches externes.A mixture 1 is then prepared intended to be mixed with the base atomized to form the outer layers.

Il est en effet nécessaire de prévoir un mélange 1 distinct dans la mesure où certains des constituants susceptibles de rentrer dans la composition de la couche externe ne peuvent pas être atomisés parce qu'il sont détruits par la chaleur. C'est le cas notamment des enzymes et de l'anti-mousse.It is indeed necessary to provide a separate mixture 1 in the measurement where some of the constituents likely to enter into the composition of the outer layer cannot be atomized because they are destroyed by heat. This is particularly the case for enzymes and anti-foam.

La composition du mélange 1 est la suivante :

  • tripolyphosphate de soude hydraté   37,5 g
  • alcools gras éthoxylés + polyéthylène glycol   6 g
  • enzymes   2,5 g
  • anti-mousse   1 g
The composition of mixture 1 is as follows:
  • sodium hydroxide tripolyphosphate 37.5 g
  • ethoxylated fatty alcohols + polyethylene glycol 6 g
  • enzymes 2.5 g
  • anti-foam 1 g

Selon le procédé de l'invention, on mélange la base atomisée avec le mélange 1. On sépare le mélange obtenu en deux parties égales destinées à former les couches externes.According to the process of the invention, the atomized base is mixed with the mixture 1. The mixture obtained is separated into two equal parts intended to form the outer layers.

On dépose la première moitié sur un support, puis on la tasse en le soumettant à une force de précompression de 15 kg/cm2.The first half is placed on a support, then it is packed by subjecting it to a precompression force of 15 kg / cm 2 .

On prépare ensuite un mélange 2 destiné à former la couche centrale comprenant:

  • argile de type bentonite   2 g
  • polyvinylpyrrolidone modifiée   2 g
  • perborate de sodium monohydraté   20 g
  • carbonate de sodium   4 g
  • zéolithe   2 g
A mixture 2 is then prepared intended to form the central layer comprising:
  • bentonite clay 2 g
  • modified polyvinylpyrrolidone 2 g
  • sodium perborate monohydrate 20 g
  • sodium carbonate 4 g
  • zeolite 2 g

On dépose ce mélange 2 sur la première couche externe puis on le tasse en la soumettant une force de précompression de 15 kg/m2.This mixture 2 is deposited on the first outer layer and then packed by subjecting it to a precompression force of 15 kg / m 2 .

On dépose enfin sur la couche centrale le mélange destiné à former la seconde couche externe puis on soumet la tablette obtenue à une pression de 60 kg/m2.Finally, the mixture intended to form the second outer layer is deposited on the central layer, then the tablet obtained is subjected to a pressure of 60 kg / m 2 .

Pour une tablette de 40 g, les deux couches externes représentent 26 g, tandis que la couche centrale représente 14 g.For a 40 g tablet, the two outer layers represent 26 g, while the central layer represents 14 g.

Exemple 2 - Tablette sans phosphateExample 2 - Phosphate-free tablet

Dans l'exemple 2, on procède de façon similaire à l'exemple 1.In example 2, the procedure is similar to example 1.

On prépare tout d'abord une base atomisée comprenant :

  • alkylbenzènesulfonate de sodium   13 g
  • savon   0,8 g
  • azurants optiques   0,2 g
  • carbonate de sodium   12 g
  • bicarbonate   8 g
  • phosphonate   0,3 g
  • copolymère acrylique maléique   1,6 g
  • disilicate de sodium   6,5 g
  • dérivés de cellulose   2,6 g
  • parfum   0,5 g
  • zéolithe granulé   19,8 g
First of all, an atomized base is prepared comprising:
  • sodium alkylbenzenesulfonate 13 g
  • soap 0.8 g
  • 0.2 g optical brighteners
  • sodium carbonate 12 g
  • baking soda 8 g
  • phosphonate 0.3 g
  • maleic acrylic copolymer 1.6 g
  • sodium disilicate 6.5 g
  • cellulose derivatives 2.6 g
  • fragrance 0.5 g
  • granulated zeolite 19.8 g

On prépare ensuite un mélange 1 destiné à former avec la base atomisée les couches externes, ce mélange comprenant :

  • alcools gras éthoxylés + polyéthylène glycol   4,2 g
  • enzymes   2,5 g
  • anti-mousse   1 g
A mixture 1 is then prepared intended to form the outer layers with the atomized base, this mixture comprising:
  • ethoxylated fatty alcohols + polyethylene glycol 4.2 g
  • enzymes 2.5 g
  • anti-foam 1 g

On prépare enfin le mélange 2 destiné à former la couche médiane comprenant :

  • carbonate de sodium   2 g
  • percarbonate de sodium   20 g
  • TAED   4 g
  • polyvinylpirrolidone modifiée   2 g
  • dérivés de cellulose   2 g
  • zéolithe granulé   5 g
Finally, mixture 2 is prepared intended to form the middle layer comprising:
  • sodium carbonate 2 g
  • sodium percarbonate 20 g
  • TAED 4 g
  • modified polyvinylpirrolidone 2 g
  • cellulose derivatives 2 g
  • granulated zeolite 5 g

Les tablettes sont fabriquées selon le même procédé que dans l'exemple 1.The tablets are produced according to the same process as in Example 1.

Pour une tablette de 40 g, les deux couches externes représentent 26 g et la couche centrale représente 14 g.For a 40 g tablet, the two outer layers represent 26 g and the central layer represents 14 g.

Les avantages de l'invention ressortent bien de la description.The advantages of the invention appear clearly from the description.

On notera en particulier la capacité de la tablette à se déliter rapidement interdisant ainsi au système peroxydant de se fixer sur le linge.Note in particular the ability of the tablet to disintegrate quickly thus preventing the peroxidizing system from attaching to the laundry.

De plus, de par sa structure multicouche, la tablette de l'invention présente une forte stabilité en séparant système peroxydant et système enzymatique.In addition, due to its multilayer structure, the tablet of the invention has strong stability in separating peroxidizing system and enzymatic system.

Claims (10)

Tablette du type multicouches pour le lavage du linge, caractérisée ce qu'elle est constituée d'une structure sandwich comprenant au moins trois couches, respectivement : deux couches externes comprenant un système enzymatique ; une couche centrale comprenant un système peroxydant ; la couche centrale comprenant en outre au moins un agent désintégrant apte à permettre le délitement de ladite couche en une durée inférieure ou égale à 80 secondes après délitement complet des deux couches externes.Multilayer type shelf for washing clothes, characterized in that it consists of a sandwich structure comprising at least three layers, respectively: two outer layers comprising an enzymatic system; a central layer comprising a peroxidizing system; the central layer further comprising at least one disintegrating agent capable of allowing the disintegration of said layer in a time less than or equal to 80 seconds after complete disintegration of the two external layers. Tablette selon la revendication 1, caractérisée en ce que l'agent désintégrant est choisi dans le groupe comprenant l'argile, la cellulose et ses dérivés, la polyvinylpyrrolidone et l'amidon modifié ou réticulable.Tablet according to claim 1, characterized in that the agent disintegrant is chosen from the group comprising clay, cellulose and its derivatives, polyvinylpyrrolidone and modified or crosslinkable starch. Tablette selon l'une des revendications précédentes, caractérisée en ce que l'agent désintégrant représente de 5 à 20 %, avantageusement 15 % en poids de la couche centrale.Tablet according to one of the preceding claims, characterized in that the disintegrating agent represents from 5 to 20%, advantageously 15% by weight of the central layer. Tablette selon l'une des revendications précédentes, caractérisée en ce que les couches externes ont une composition chimique identique.Tablet according to one of the preceding claims, characterized in that the outer layers have an identical chemical composition. Tablette selon l'une des revendications précédentes, caractérisée en ce que les couches externes et la couche centrale comprennent en outre un agent tensioactif non ionique.Tablet according to one of the preceding claims, characterized in that the outer layers and the central layer further comprise an agent nonionic surfactant. Tablette selon l'une des revendications précédentes, caractérisée en ce que la couche centrale comprend en outre un agent désinfectant se présentant sous forme de granules enrobés aptes à être libérés en fonction de la température de l'eau de lavage.Tablet according to one of the preceding claims, characterized in that the central layer further comprises a disinfecting agent present under form of coated granules capable of being released as a function of the temperature of wash water. Tablette selon l'une des revendications précédentes, caractérisée en ce que les couches externes se délitent en une durée comprise entre trente et quatre-vingt dix secondes, avantageusement une minute. Tablet according to one of the preceding claims, characterized in that the outer layers disintegrate in a period between thirty and eighty ten seconds, preferably one minute. Tablette selon l'une des revendication précédentes, caractérisée en ce que la couche centrale se délite en une durée comprise entre vingt et soixante quinze secondes, avantageusement trente secondes.Tablet according to one of the preceding claims, characterized in that the central layer disintegrates in a period between twenty and sixty fifteen seconds, preferably thirty seconds. Procédé pour la fabrication d'une tablette multicouches selon l'une des revendications 1 à 8, selon lequel : on mélange tout d'abord les différents constituants formant les couches externes ; parallèlement, on mélange les différents constituants formant la couche centrale ; on dépose sur un support puis on tasse une partie du mélange destiné à former la première couches externe, on dépose ensuite sur ladite première couche externe le mélange formant la couche centrale puis on tasse le complexe obtenu, puis, on dépose sur la couche centrale la partie restante du mélange formant la seconde couche externe ; enfin, on presse la tablette obtenue. Method for manufacturing a multilayer tablet according to one of claims 1 to 8, according to which: firstly the various constituents forming the outer layers are mixed; in parallel, the various constituents forming the central layer are mixed; one deposits on a support then one cup a part of the mixture intended to form the first external layer, the mixture forming the central layer is then deposited on said first outer layer and then the complex obtained is packed, then, the remaining part of the mixture forming the second outer layer is deposited on the central layer; finally, the tablet obtained is pressed. Procédé selon la revendication 9 caractérisé en ce qu'on tasse la première couche externe et la couche centrale à une valeur de précompression comprise entre 10 kg/cm2 et 100 kg/cm2, tandis que l'on presse la tablette obtenue à une valeur comprise entre 20 kg/cm2 et 400 kg/cm2.Method according to Claim 9, characterized in that the first outer layer and the central layer are packed to a precompression value of between 10 kg / cm 2 and 100 kg / cm 2 , while the tablet obtained is pressed at a value between 20 kg / cm 2 and 400 kg / cm 2 .
EP99420169A 1998-07-31 1999-07-21 Multi-layer detergent tablet for laundry washing and its process of production Withdrawn EP0976820A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9810024A FR2781810B1 (en) 1998-07-31 1998-07-31 MULTI-LAYER DETERGENT TABLET FOR WASHING LAUNDRY AND METHOD OF MANUFACTURE
FR9810024 1998-07-31

Publications (1)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050557A1 (en) * 1999-02-25 2000-08-31 Henkel Kommanditgesellschaft Auf Aktien Washing and cleaning agent shaped bodies which are stable in storage
WO2000071666A1 (en) * 1999-05-21 2000-11-30 Unilever Plc Detergent compositions
EP1239028A1 (en) * 2001-03-05 2002-09-11 Unilever Plc Detergent tablets
DE102004051557A1 (en) * 2004-10-22 2006-04-27 Henkel Kgaa Detergent or detergent dosing unit
WO2009040544A1 (en) 2007-09-28 2009-04-02 Reckitt Benckiser N.V. Detergent composition
FR2926088A1 (en) * 2008-01-03 2009-07-10 Eurotab Sa Detergent tablet, useful e.g. in dishwasher devices, comprises five superimposed layers with three layers having different compositions, phosphate, active enzymes, detergent additives, surfactants and bleaching agents
WO2010116139A1 (en) 2009-04-09 2010-10-14 Reckitt Benckiser N.V. Detergent composition
US20120178148A1 (en) * 2009-09-07 2012-07-12 Reckitt Benckiser N.V. Detergent Composition
CN106916659A (en) * 2017-01-24 2017-07-04 纳爱斯集团有限公司 A kind of multilayer laundry sheet and preparation method thereof
US10053656B2 (en) 2013-08-14 2018-08-21 Budich International Gmbh Multiphase detergent tablet
WO2022268657A1 (en) 2021-06-24 2022-12-29 Unilever Ip Holdings B.V. Unit dose cleaning composition
WO2023152736A3 (en) * 2022-02-08 2023-09-28 Pika Diapers Israel Ltd Tablet and method of washing a fabric

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EP0481793A1 (en) * 1990-10-19 1992-04-22 Unilever Plc Detergent composition in tablet form
EP0481547A1 (en) * 1990-10-17 1992-04-22 Unilever N.V. Machine dishwashing detergent tablets
DE4404279A1 (en) * 1994-02-10 1995-08-17 Henkel Kgaa Tablet with builder substances
EP0851023A2 (en) * 1996-12-23 1998-07-01 Unilever N.V. Machine dishwashing tablets containing a peracid
DE19739384A1 (en) * 1997-09-09 1999-03-11 Henkel Kgaa Detergent tablets with improved solubility

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EP0481547A1 (en) * 1990-10-17 1992-04-22 Unilever N.V. Machine dishwashing detergent tablets
EP0481793A1 (en) * 1990-10-19 1992-04-22 Unilever Plc Detergent composition in tablet form
DE4404279A1 (en) * 1994-02-10 1995-08-17 Henkel Kgaa Tablet with builder substances
EP0851023A2 (en) * 1996-12-23 1998-07-01 Unilever N.V. Machine dishwashing tablets containing a peracid
DE19739384A1 (en) * 1997-09-09 1999-03-11 Henkel Kgaa Detergent tablets with improved solubility

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050557A1 (en) * 1999-02-25 2000-08-31 Henkel Kommanditgesellschaft Auf Aktien Washing and cleaning agent shaped bodies which are stable in storage
WO2000071666A1 (en) * 1999-05-21 2000-11-30 Unilever Plc Detergent compositions
US6387861B1 (en) 1999-05-21 2002-05-14 Unilever Home & Personal Care Usa Division Of Conopco, Inc. Detergent compositions
EP1239028A1 (en) * 2001-03-05 2002-09-11 Unilever Plc Detergent tablets
DE102004051557A1 (en) * 2004-10-22 2006-04-27 Henkel Kgaa Detergent or detergent dosing unit
WO2006045453A1 (en) * 2004-10-22 2006-05-04 Henkel Kommanditgesellschaft Auf Aktien Washing or cleaning agent dosing unit
US10377972B2 (en) 2007-09-28 2019-08-13 Reckitt Benckiser Finish B.V. Detergent composition
WO2009040544A1 (en) 2007-09-28 2009-04-02 Reckitt Benckiser N.V. Detergent composition
FR2926088A1 (en) * 2008-01-03 2009-07-10 Eurotab Sa Detergent tablet, useful e.g. in dishwasher devices, comprises five superimposed layers with three layers having different compositions, phosphate, active enzymes, detergent additives, surfactants and bleaching agents
WO2010116139A1 (en) 2009-04-09 2010-10-14 Reckitt Benckiser N.V. Detergent composition
US20120178148A1 (en) * 2009-09-07 2012-07-12 Reckitt Benckiser N.V. Detergent Composition
US10655089B2 (en) 2009-09-07 2020-05-19 Reckitt Benckiser Finish B.V. Detergent composition
US11015148B2 (en) 2009-09-07 2021-05-25 Reckitt Benckiser Finish B.V. Detergent composition
US10053656B2 (en) 2013-08-14 2018-08-21 Budich International Gmbh Multiphase detergent tablet
CN106916659A (en) * 2017-01-24 2017-07-04 纳爱斯集团有限公司 A kind of multilayer laundry sheet and preparation method thereof
WO2022268657A1 (en) 2021-06-24 2022-12-29 Unilever Ip Holdings B.V. Unit dose cleaning composition
WO2022268728A1 (en) 2021-06-24 2022-12-29 Unilever Ip Holdings B.V. Unit dose cleaning composition
WO2023152736A3 (en) * 2022-02-08 2023-09-28 Pika Diapers Israel Ltd Tablet and method of washing a fabric

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