WO2004052746A1 - Method & apparatus for packing powdered or granular material - Google Patents

Method & apparatus for packing powdered or granular material Download PDF

Info

Publication number
WO2004052746A1
WO2004052746A1 PCT/GB2003/005052 GB0305052W WO2004052746A1 WO 2004052746 A1 WO2004052746 A1 WO 2004052746A1 GB 0305052 W GB0305052 W GB 0305052W WO 2004052746 A1 WO2004052746 A1 WO 2004052746A1
Authority
WO
WIPO (PCT)
Prior art keywords
bag
water
layer
soluble
permeable
Prior art date
Application number
PCT/GB2003/005052
Other languages
French (fr)
Inventor
Timothy John Michael Hegarty
Richard Hugh Baldry
Original Assignee
Blue Bag (Innovation) Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Blue Bag (Innovation) Ltd filed Critical Blue Bag (Innovation) Ltd
Priority to EP03812609A priority Critical patent/EP1569857A1/en
Priority to AU2003302910A priority patent/AU2003302910A1/en
Publication of WO2004052746A1 publication Critical patent/WO2004052746A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/06—Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
    • C04B40/0608—Dry ready-made mixtures, e.g. mortars at which only water or a water solution has to be added before use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0077—Packaging material remaining in the mixture after the mixing step, e.g. soluble bags containing active ingredients

Definitions

  • the present invention relates to a method and apparatus for packing powdered or granular material, e.g. cement .
  • Cementitious material is typically packed in three-ply bags comprising inner and outer layers of paper material separated by a layer of plastics material, the bags being perforated to allow excess air to escape through the perforations when the bags are stacked.
  • the perforations also allow the undesirable ingress of moisture into the bags, which may spoil their contents .
  • a method for mixing a powdered cementitious material with water comprising providing a quantity of said material in a bag having an inner, support layer of water- soluble material and a non-permeable outer layer of waterproof material, breaching said inner and outer layers and placing the bag in a mixer also containing a quantity of water, the resulting ingress of water into the bag causing the water- soluble inner layer to dissolve, thereby allowing the waterproof exterior of the bag to disintegrate within the mix.
  • the inner layer comprises a water-soluble bag of paper or plastics material and the outer layer comprises either a non-permeable waterproof bag, to which the inner layer is bonded, or a non-permeable waterproof coating applied by a spray or dip-coating process.
  • the water-soluble bag is porous or formed with one or more perforations to permit air to escape from the bag prior to it being spray or dip-coated.
  • the coating comprises a material which provides a limited degree of cohesion with that of another bag, to secure the bag in position within a stack.
  • the mixer is rotated to further breach the bag and to enable the water to fully come into contact with all of the water-soluble inner layer.
  • the bag may be beached initially by rotation of the mixer. The bag may be breached before or after it is placed in the mixer.
  • the water may be added to the mixer before or after the bag is placed in the mixer.
  • a bag for containing a powdered cementitious material comprising an inner layer of water-soluble material and a non-permeable outer layer of waterproof material .
  • a bag containing a powdered cementitious material comprising an inner layer of water-soluble material and a non-permeable outer layer of waterproof material .
  • a method for packing powdered or granular material comprising filling a bag with a quantity of said material and then spray or dip-coating substantially the whole of the exterior of the bag with a non-permeable, waterproof coating.
  • the bag is soluble in water.
  • said powdered or granular material comprises a powdered cementitious material .
  • the bag is porous or perforated and the filled bag is compressed or subjected to a vacuum prior, prior to being coated, to reduce its residual air content.
  • an apparatus arranged to fill a bag with a quantity of powdered or granular material and to then spray or dip-coat substantially the whole of the exterior of the bag with a non-permeable waterproof coating.
  • the apparatus comprises means for compressing or subjecting a porous or perforated bag to a vacuum, prior to its being coated, to reduce the residual air content of the bag.
  • a method for manufacturing a bag for containing cementitious material comprising forming a two- layer material comprising a layer of water soluble material and a non-permeable layer of waterproof material and forming the two-layer material into a bag having said layer of water soluble material as an inner layer thereof and said non- permeable layer of waterproof material as an outer layer thereof .
  • the two layers may be co-extruded either as a sheet, which is then folded and bonded to form a bag, or as a tube, one end of which is closed to form a bag.
  • the two layers may comprise respective sheets which are which are superimposed and bonded together, before being folded and bonded to form a bag.
  • Figure 1 is a series of schematic images illustrating a process, in accordance with the present invention, for producing a bag filled with cementitious material
  • Figure 2 illustrates how the bag filled according to the process illustrated in Figure 1 may be used, in accordance with the present invention, to produce a mix of cementitious material with water.
  • a bag filling process in accordance with the present invention comprising the steps of providing a perforated or porous, water-soluble bag
  • the filled bag produced in this manner, may then be stored, indefinitely, with any ingress of moisture into the bag being prevented by the non-permeable, waterproof layer applied thereto.
  • cementitious material may be packed in a two-ply bag comprising an inner layer of water-soluble material and a non- permeable outer layer of waterproof material , the two layers being either co-extruded as a sheet or tube or formed from two sheets, superimposed and bonded together.
  • the surface of the bag 2 can be punctured, for example by hitting the surface of the bag with a shovel, and the punctured bag placed in the drum 6 of a cement mixer, to which a quantity of water is then added.

Abstract

A bag for containing a powdered cementitious material, comprises an inner layer of water-soluble material and a non-permeable outer layer of waterproof material. In use, the inner and outer layers of the bag containing said cementitious material is breached and placed in a cement mixer containing a quantity of water.

Description

Method & Apparatus for Packing Powdered or Granular Material
The present invention, relates to a method and apparatus for packing powdered or granular material, e.g. cement .
Cementitious material is typically packed in three-ply bags comprising inner and outer layers of paper material separated by a layer of plastics material, the bags being perforated to allow excess air to escape through the perforations when the bags are stacked.
However, the perforations also allow the undesirable ingress of moisture into the bags, which may spoil their contents .
Recently, various methods and apparatus have been devised for reducing the residual air content of bags filled with cementitious material, thereby allowing the bags to be formed from non-permeable waterproof plastics materials.
However, the materials from which such bags have hitherto been formed do not allow their contents to be readily extracted.
We have now devised an arrangement which overcomes the limitations of existing arrangements for packing powdered cementitious materials.
According to a first aspect of the present invention there is provided a method for mixing a powdered cementitious material with water, comprising providing a quantity of said material in a bag having an inner, support layer of water- soluble material and a non-permeable outer layer of waterproof material, breaching said inner and outer layers and placing the bag in a mixer also containing a quantity of water, the resulting ingress of water into the bag causing the water- soluble inner layer to dissolve, thereby allowing the waterproof exterior of the bag to disintegrate within the mix.
Preferably the inner layer comprises a water-soluble bag of paper or plastics material and the outer layer comprises either a non-permeable waterproof bag, to which the inner layer is bonded, or a non-permeable waterproof coating applied by a spray or dip-coating process.
In the latter case, preferably the water-soluble bag is porous or formed with one or more perforations to permit air to escape from the bag prior to it being spray or dip-coated. Preferably the coating comprises a material which provides a limited degree of cohesion with that of another bag, to secure the bag in position within a stack.
Preferably the mixer is rotated to further breach the bag and to enable the water to fully come into contact with all of the water-soluble inner layer. In fact, the bag may be beached initially by rotation of the mixer. The bag may be breached before or after it is placed in the mixer.
The water may be added to the mixer before or after the bag is placed in the mixer.
According to a second aspect of the present invention, there is provided a bag for containing a powdered cementitious material, the bag comprising an inner layer of water-soluble material and a non-permeable outer layer of waterproof material .
According to a third aspect of the present invention, there is provided a bag containing a powdered cementitious material, the bag comprising an inner layer of water-soluble material and a non-permeable outer layer of waterproof material .
According to a fourth aspect of the present invention, there is provided a method for packing powdered or granular material, comprising filling a bag with a quantity of said material and then spray or dip-coating substantially the whole of the exterior of the bag with a non-permeable, waterproof coating. Preferably the bag is soluble in water.
Preferably said powdered or granular material comprises a powdered cementitious material .
Preferably the bag is porous or perforated and the filled bag is compressed or subjected to a vacuum prior, prior to being coated, to reduce its residual air content.
According to a fifth aspect of the present invention, there is provided an apparatus arranged to fill a bag with a quantity of powdered or granular material and to then spray or dip-coat substantially the whole of the exterior of the bag with a non-permeable waterproof coating.
Preferably the apparatus comprises means for compressing or subjecting a porous or perforated bag to a vacuum, prior to its being coated, to reduce the residual air content of the bag.
According to a sixth aspect of the present invention, there is provided a method for manufacturing a bag for containing cementitious material, comprising forming a two- layer material comprising a layer of water soluble material and a non-permeable layer of waterproof material and forming the two-layer material into a bag having said layer of water soluble material as an inner layer thereof and said non- permeable layer of waterproof material as an outer layer thereof .
The two layers may be co-extruded either as a sheet, which is then folded and bonded to form a bag, or as a tube, one end of which is closed to form a bag. Alternatively, the two layers may comprise respective sheets which are which are superimposed and bonded together, before being folded and bonded to form a bag.
Embodiments of the present invention will now be described by way of examples only and with reference to the accompanying drawings, in which:
Figure 1 is a series of schematic images illustrating a process, in accordance with the present invention, for producing a bag filled with cementitious material; and
Figure 2 illustrates how the bag filled according to the process illustrated in Figure 1 may be used, in accordance with the present invention, to produce a mix of cementitious material with water.
Referring to Figure 1, a bag filling process in accordance with the present invention is shown comprising the steps of providing a perforated or porous, water-soluble bag
2 (Figure la) , filling the bag with a quantity of powdered cementitious material from a hopper 4 (Figure lb) , closing the mouth of the bag (Figure lc) , compressing and/or subjecting the bag to a vacuum to reduce its residual air content (Figure Id) and then spray coating substantially the whole of the surface of the bag with a non-permeable layer of waterproof material (Figure le) .
The filled bag, produced in this manner, may then be stored, indefinitely, with any ingress of moisture into the bag being prevented by the non-permeable, waterproof layer applied thereto. As an alternative to the method illustrated in Figure 1, cementitious material may be packed in a two-ply bag comprising an inner layer of water-soluble material and a non- permeable outer layer of waterproof material , the two layers being either co-extruded as a sheet or tube or formed from two sheets, superimposed and bonded together.
As shown in Figure 2, when it is desired to form a mix of cementitious material with water, the surface of the bag 2 can be punctured, for example by hitting the surface of the bag with a shovel, and the punctured bag placed in the drum 6 of a cement mixer, to which a quantity of water is then added.
The action of water seeping into the punctured bag will thus cause the water-soluble inner layer of the bag to dissolve, with an accompanying agitation of the bag, by rotation of the drum 6 of the mixer, causing the non-permeable outer layer to then disintegrate, leaving only trace fragments of that layer within the resulting mix.
The methods and apparatus thus described provide a convenient means by which the powdered cementitious contents of packed bags may be readily extracted.

Claims

Claims
1. A method for mixing a powdered cementitious material with water, comprising providing a quantity of said material in a bag having an inner, support layer of water-soluble material and a non-permeable outer layer of waterproof material, breaching said inner and outer layers and placing the bag in a mixer also containing a quantity of water, the resulting ingress of water into the bag causing the water- soluble inner layer to dissolve, thereby allowing the waterproof exterior of the bag to disintegrate within the mix.
2. A method as claimed in claim 1, in which the inner layer comprises a water-soluble bag and the outer layer comprises a non-permeable waterproof bag, to which the inner layer is bonded.
3. A method as claimed in claim 1, in which the inner layer comprises a water-soluble bag and the outer layer comprises a non-permeable waterproof coating applied by a spray or dip-coating process.
4. A method as claimed in claim 3, in which the water- soluble bag is porous or formed with one or more perforations to permit air to escape from the bag prior to it being spray or dip-coated.
5. A method as claimed in claims 4 or 5, in which the coating comprises a material which provides a limited degree of cohesion with that of another bag, to secure the bag in position within a stack.
6. A bag for containing a powdered cementitious material, the bag comprising an inner layer of water-soluble material and a non-permeable outer layer of waterproof material .
7. A bag containing a powdered cementitious material, the bag comprising an inner layer of water-soluble material and a non-permeable outer layer of waterproof material .
8. A method for packing powdered or granular material, comprising filling a bag with a quantity of said material and then spray or dip-coating substantially the whole of the exterior of the bag with a non-permeable, waterproof coating.
9. A method as claimed in claim 8, in which the bag is soluble in water.
10. A method as claimed in claims 8 or 9, in which said powdered or granular material comprises a powdered cementitious material .
11. A method as claimed in any of claims 8 to 10, in which the bag is porous or perforated and the filled bag is compressed or subjected to a vacuum prior, prior to being coated, to reduce its residual air content.
12. An apparatus arranged to fill a bag with a quantity of powdered or granular material and to then spray or dip-coat substantially the whole of the exterior of the bag with a non- permeable waterproof coating.
13. An apparatus as claimed in claim 12, comprising means for compressing or subjecting a porous or perforated bag to a vacuum, prior to its being coated, to reduce the residual air content of the bag.
14. A method for manufacturing a bag for containing cementitious material, comprising forming a two-layer material comprising a layer of water soluble material and a non- permeable layer of waterproof material and forming the two- layer material into a bag having said layer of water soluble material as an inner layer thereof and said non-permeable layer of waterproof material as an outer layer thereof.
15. A method as claimed in claim 14, in which said two layers may be co-extruded either as a sheet, which is then folded and bonded to form a bag, or as a tube, one end of which is closed to form a bag.
16. A method as claimed in claim 15, in which the two layers comprise respective sheets which are superimposed and bonded together, before being folded and bonded to form a bag.
PCT/GB2003/005052 2002-12-07 2003-11-20 Method & apparatus for packing powdered or granular material WO2004052746A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03812609A EP1569857A1 (en) 2002-12-07 2003-11-20 Method apparatus for packing powdered or granular material
AU2003302910A AU2003302910A1 (en) 2002-12-07 2003-11-20 Method and apparatus for packing powdered or granular material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0228618.5 2002-12-07
GB0228618A GB0228618D0 (en) 2002-12-07 2002-12-07 Method & apparatus for packing powdered or granular material

Publications (1)

Publication Number Publication Date
WO2004052746A1 true WO2004052746A1 (en) 2004-06-24

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PCT/GB2003/005052 WO2004052746A1 (en) 2002-12-07 2003-11-20 Method & apparatus for packing powdered or granular material

Country Status (4)

Country Link
EP (1) EP1569857A1 (en)
AU (1) AU2003302910A1 (en)
GB (1) GB0228618D0 (en)
WO (1) WO2004052746A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2874598A1 (en) * 2004-08-27 2006-03-03 Toupret Ind Sa Packaging bag is made from waterproof plastic to contain hydrophilic building material such as plaster or rendering cement
GB2448486A (en) * 2007-04-19 2008-10-22 Thomas Colin Raymond Hall Industrial cement, lime and plaster bags
US20120199243A2 (en) * 2010-06-28 2012-08-09 Mondi Ag Bag with a Bag Wall Designed to Dissolve in a Moist Environment and Use of the Bag as a Cement Bag
EP2963179A1 (en) 2014-07-04 2016-01-06 BillerudKorsnäs AB Coated sack paper
EP2963178A1 (en) 2014-07-04 2016-01-06 BillerudKorsnäs AB Production of sack paper
EP3088606A1 (en) 2015-04-29 2016-11-02 BillerudKorsnäs AB Disintegratable brown sack paper
US9579823B2 (en) 2011-10-04 2017-02-28 Lafarge Bag and its use to provide admixture for a hydraulic composition
EP3184273A1 (en) * 2015-12-22 2017-06-28 Lafarge Bag for containing powdery substances
AT525239A4 (en) * 2022-03-18 2023-02-15 Baumit Beteiligungen Gmbh Paper sack with sack contents

Citations (12)

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US2745546A (en) * 1951-02-03 1956-05-15 Karl Fischer Treating packing material
US4348293A (en) * 1978-11-17 1982-09-07 Lever Brothers Company Water-insoluble, water-permeable bag having a water-soluble or water-dispersable protective layer and containing a particulate detergent composition
US4961790A (en) * 1989-05-19 1990-10-09 Fritz Chemical Company Concrete admixture device and method of using same
WO1992001556A1 (en) * 1990-07-24 1992-02-06 Bhp Plastics Limited Composite polymeric articles
EP0470829A1 (en) * 1990-08-07 1992-02-12 W.R. Grace & Co.-Conn. Method for modifying concrete properties
DE4214540C1 (en) * 1992-04-28 1993-06-17 P. Baumhueter Gmbh, 4840 Rheda-Wiedenbrueck, De Plastic fibres for adding to e.g. concrete - for easy handling are used packed in porous bags of water-soluble e.g. polyvinyl alcohol which dissolve during mixing with concrete etc.
WO1993022125A1 (en) * 1992-04-23 1993-11-11 British Technology Group Inter-Corporate Licensing Limited Polymeric articles and materials
DE9318666U1 (en) * 1993-12-07 1994-01-27 V F A S R L Packaging bags for building and construction additives
JPH10258845A (en) * 1997-03-19 1998-09-29 Kanpai:Kk Water dispersion cement bag
WO2001081265A2 (en) * 2000-04-27 2001-11-01 W.R. Grace & Co.-Conn. Basic-medium-soluble packaging material for use in castable cementitious composites
WO2001083669A1 (en) * 2000-04-28 2001-11-08 The Procter & Gamble Company Pouched compositions
GB2373235A (en) * 2001-03-16 2002-09-18 Reckitt Benckiser Composition packaged in film

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745546A (en) * 1951-02-03 1956-05-15 Karl Fischer Treating packing material
US4348293A (en) * 1978-11-17 1982-09-07 Lever Brothers Company Water-insoluble, water-permeable bag having a water-soluble or water-dispersable protective layer and containing a particulate detergent composition
US4961790A (en) * 1989-05-19 1990-10-09 Fritz Chemical Company Concrete admixture device and method of using same
WO1992001556A1 (en) * 1990-07-24 1992-02-06 Bhp Plastics Limited Composite polymeric articles
EP0470829A1 (en) * 1990-08-07 1992-02-12 W.R. Grace & Co.-Conn. Method for modifying concrete properties
WO1993022125A1 (en) * 1992-04-23 1993-11-11 British Technology Group Inter-Corporate Licensing Limited Polymeric articles and materials
DE4214540C1 (en) * 1992-04-28 1993-06-17 P. Baumhueter Gmbh, 4840 Rheda-Wiedenbrueck, De Plastic fibres for adding to e.g. concrete - for easy handling are used packed in porous bags of water-soluble e.g. polyvinyl alcohol which dissolve during mixing with concrete etc.
DE9318666U1 (en) * 1993-12-07 1994-01-27 V F A S R L Packaging bags for building and construction additives
JPH10258845A (en) * 1997-03-19 1998-09-29 Kanpai:Kk Water dispersion cement bag
WO2001081265A2 (en) * 2000-04-27 2001-11-01 W.R. Grace & Co.-Conn. Basic-medium-soluble packaging material for use in castable cementitious composites
WO2001083669A1 (en) * 2000-04-28 2001-11-08 The Procter & Gamble Company Pouched compositions
GB2373235A (en) * 2001-03-16 2002-09-18 Reckitt Benckiser Composition packaged in film

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PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14 31 December 1998 (1998-12-31) *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2874598A1 (en) * 2004-08-27 2006-03-03 Toupret Ind Sa Packaging bag is made from waterproof plastic to contain hydrophilic building material such as plaster or rendering cement
GB2448486A (en) * 2007-04-19 2008-10-22 Thomas Colin Raymond Hall Industrial cement, lime and plaster bags
US20120199243A2 (en) * 2010-06-28 2012-08-09 Mondi Ag Bag with a Bag Wall Designed to Dissolve in a Moist Environment and Use of the Bag as a Cement Bag
US8851752B2 (en) * 2010-06-28 2014-10-07 Mondi Ag Bag with a bag wall designed to dissolve in a moist environment and use of the bag as a cement bag
US9579823B2 (en) 2011-10-04 2017-02-28 Lafarge Bag and its use to provide admixture for a hydraulic composition
WO2016001028A1 (en) 2014-07-04 2016-01-07 Billerudkorsnäs Ab Production of sack paper
EP2963178A1 (en) 2014-07-04 2016-01-06 BillerudKorsnäs AB Production of sack paper
EP2963179A1 (en) 2014-07-04 2016-01-06 BillerudKorsnäs AB Coated sack paper
EP3088606A1 (en) 2015-04-29 2016-11-02 BillerudKorsnäs AB Disintegratable brown sack paper
EP3184273A1 (en) * 2015-12-22 2017-06-28 Lafarge Bag for containing powdery substances
AT525239A4 (en) * 2022-03-18 2023-02-15 Baumit Beteiligungen Gmbh Paper sack with sack contents
AT525239B1 (en) * 2022-03-18 2023-02-15 Baumit Beteiligungen Gmbh Paper sack with sack contents
WO2023173148A1 (en) 2022-03-18 2023-09-21 Baumit Beteiligungen Gmbh Paper bag having bag contents

Also Published As

Publication number Publication date
GB0228618D0 (en) 2003-01-15
AU2003302910A1 (en) 2004-06-30
EP1569857A1 (en) 2005-09-07

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