DE2351923A1 - HEAT SEALABLE POLYPROPYLENE FILM - Google Patents
HEAT SEALABLE POLYPROPYLENE FILMInfo
- Publication number
- DE2351923A1 DE2351923A1 DE19732351923 DE2351923A DE2351923A1 DE 2351923 A1 DE2351923 A1 DE 2351923A1 DE 19732351923 DE19732351923 DE 19732351923 DE 2351923 A DE2351923 A DE 2351923A DE 2351923 A1 DE2351923 A1 DE 2351923A1
- Authority
- DE
- Germany
- Prior art keywords
- copolymer
- olefin
- heat
- film
- sealable
- 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.)
- Ceased
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/052—Forming heat-sealable coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C09J123/0815—Copolymers of ethene with aliphatic 1-olefins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
Description
DR.-1NG. RICHARD GLAWE MönchenDR.-1NG. RICHARD GLAWE monks
PATENTANWÄLTE .PATENT LAWYERS.
DIPL-ING. KLAUS DELFS HAMBURGDIPL-ING. KLAUS DELFS HAMBURG
DIPL-PHYS. DR. WALTER MOLL MÜNCHENDIPL-PHYS. DR. WALTER MOLL MUNICH
8 MÖNCHEN 26 POSTFACH 37 LIEBHERRSTR. 20 TEL. (0811) 22 65 48 TELEX 52 25 05 spez8 MÖNCHEN 26 POST BOX 37 LIEBHERRSTR. 20th TEL. (0811) 22 65 48 TELEX 52 25 05 spec
2 HAMBURG 52 WAITZSTR. 12 TEL. (0411) 89 22 55 TELEX 21 29 21 spez2 HAMBURG 52 WAITZSTR. 12 TEL. (0411) 89 22 55 TELEX 21 29 21 spec
IHR ZEICHEN BETRIFFT:YOUR SIGN CONCERNS:
IHRE NACHRICHT VOMYOUR MESSAGE FROM
UNSER ZEICHEN
A 61OUR SIGN
A 61
MÜNCHENMUNICH
British Cellophane Limited Bridgwater, Somerset /EnglandBritish Cellophane Limited Bridgwater, Somerset / England
Heißsiegelfähige PolypropylenfolieHeat sealable polypropylene film
Die Erfindung betrifft eine heißsiegelfähige Polypropylenfolie .The invention relates to a heat sealable polypropylene film .
In den letzten Jahren sind Polypropylenfolien in verstärktem Ausmaß als Einwickel- und Verpackungsmaterial verwendet worden, und zwar infolge ihrer ausgezeichneten Klarheit und ihrer Festigkeit, die erheblich verbessert wird, wenn die ?olie in einer Richtung oder mehreren unter reck-In recent years, polypropylene films are in reinforcement It has been used extensively as a wrapping and packaging material because of its excellent clarity and its strength, which is considerably improved if the oil is stretched in one or more directions.
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orientierungsfähigen Bedingungen gereckt bzw. gestreckt wird. Dadurch r/fird die IJolekularstruktur mindestens teilweise in Heckriehtung orientiert. Unter "reckorientierungsfähigen Bedingungen" für Polypropylenfolien ist zu verstehen, daß die RecIaBaßnahme durchgeführt wird, wenn die Folie innerhalb eines "Icmperaturbereichs zwischen 2 C unterhalb des Kristall Schmelzpunkts des Polypropylens und seiner Übergangstemperatur der zweiten Ordnung gehalten vvird.orientable conditions is stretched or stretched. Characterized r / FIRD the IJolekularstruktur at least partially in Heckriehtung oriented. Under "stretch-orientable conditions" for polypropylene films is to be understood that the recycling measure is carried out when the film is kept within a temperature range between 2 C below the crystal melting point of the polypropylene and its transition temperature of the second order.
I1Ur wirkungsvolle Verpackungs zwecke, insbesondere auf Hochgesehwindigkeits-Verpackungsmaschinen, ist es erforderlich, daß die Polypropylenfolie jederzeit und leicht mit sich selbst versiegelt werden kann. Während Polypropylenfilm von ITatur aus mit sieh selbst heißsiegelfähig ist, schrumpft eine orientierte Folie umd bildet unerwünschte Beulen oder Verzerrungen bei den lemperaturen, die zur Erzielung einer Versiegelung geeigneter Festigkeit erforderlich sind (d.h. etwa 1600G).I 1 Ur effective packaging purposes, especially on high-speed packaging machines, it is necessary that the polypropylene film can be sealed to itself at all times and easily. While polypropylene film of ITatur made with check is itself heat-sealable, oriented film shrinks a umd forms undesirable bumps or distortions in the lemperaturen, suitably to achieve a seal strength are required (ie, about 160 0 G).
Die Erfindung ist auf eine orientierte Polypropylenfolie mit einer heißsiegelfähigen Beschichtung gerichtet, mit der geeignete Heißsiegelungen bei einer !Temperatur erreicht werden können, bei welcher eine unbedeutende Hitzeverzerrung der orientierten Polypropylenfolie stattfindet.The invention is based on an oriented polypropylene film directed with a heat sealable coating that achieves suitable heat seals at a! temperature at which insignificant heat distortion of the oriented polypropylene film occurs.
Die heißsiegelfähige, orientierte Kunststoffolie der Erfindung umfaßt eine orientierte Polypropylenfolie, welche auf mindestens einer Oberfläche mit einer heißsiegelfähigen SchichtThe heat sealable, oriented plastic film of the invention comprises an oriented polypropylene film which is coated on at least one surface with a heat-sealable layer
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ausgerüstet ist. Die heißsiegelfähige Schicht umfaßt ein überwiegend lineares ungeordnetes Copolymer aus Äthylen und bis zu 12 Mol-$ mindestens eines weiteren, wenigstens drei Kohlenstoff atome pro Molekül aufweisenden Alpha-Olefins.is equipped. The heat sealable layer comprises a predominantly linear disordered copolymer of ethylene and bis to 12 moles at least one more, at least three carbon alpha-olefin containing atoms per molecule.
Die Bezeichnung ,"Polypropylenfolie" schließt eine Folie aus Polypropylen ein, dem ein kleiner Anteil eines verträglichen Polyolefins, welches die physikalischen Eigenschaften der !Folie nicnt wesentlich beeinträchtigt, zugemischt ist.The term "polypropylene film" excludes a film Polypropylene, which contains a small proportion of a compatible polyolefin which has the physical properties of the ! Foil is not significantly impaired, is mixed in.
Das Copolymere wird hergestellt, indem man die Monomeren unter Bedingungen reagieren läßt, unter denen die Ausbildung linearer Ketten von Äthyleneinheiten mit wenig Verzweigungen und mit ungeordneter Verteilung der Comonomeren entlang der Ketten begünstigt wird, z.B. unter katalytischen Hiederdruckbedingungen, wie sie bei der Polymerisation von Äthylen zur Herstellung von Polyäthylenen hoher Dichte angewendet werden. Unter diesen Bedingungen findet die Reaktion bei relativ niedrigen Drücken in Gegenwart eines Koordinations- oder organometaiiisehen Katalysators, z.B. eines sogenannten Ziegler—Katalysators, eines Übergangsmetalloxid-Katalysators oder ähnliener Katalysatoren, statt.The copolymer is prepared by allowing the monomers to react under conditions under which the formation linear chains of ethylene units with few branches and with a disordered distribution of the comonomers along the Chains are favored, e.g. under catalytic low pressure conditions, as used in the polymerization of ethylene for the production of high density polyethylenes. Under these conditions the reaction takes place at relatively low pressures in the presence of a coordination or organometallic catalyst, e.g. a so-called Ziegler catalyst, a transition metal oxide catalyst or similar catalysts instead.
Wenn das Copolymer einen Gehalt von mehr als etwa 12 Mol-^ö des weiteren Alpha-Olefins aufweist, zeigt es eine Neigung zum Klebrigwerden. Dies führt dazu, daß die KunststoffolienIf the copolymer has a content greater than about 12 mol- ^ ö further has alpha-olefin, it shows a tendency to get sticky. This leads to the fact that the plastic films
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schwierig in Form von Rollen und auf Umwandlungsmaschinen für Folien gehandhabt v/erden können. difficult to handle in the form of rolls and on film converting machines.
Der Anteil des weiteren Alplia-Olefins in dem ungeordneten Copolymer liegt vorzugsweise im Bereich zwischen 2 und 8 Mol-vi, insbesondere zwischen 2,5 und 5 Mol-?& des Copolymeren. Das weitere Alpha-Ülefin kann vorzugsweise Propylen oder Buten-1 sein.The proportion of the further Alplia olefin in the disordered Copolymer is preferably in the range between 2 and 8 mol-vi, in particular between 2.5 and 5 mol - & of the copolymer. That further alpha olefins can preferably be propylene or butene-1 be.
Die CopοIvmeren der Erfindung sind durch einen Schmelzpunkt unterhalb 135°C, bestimmt durch differentielle thermische Analyse (D.T.A.), gekennzeichnet. Die für die Erfindung besonders geeigneten Copolymere weisen D.T.A.-Schmelzpunkte unterhalb 125°C auf. Der D.T.A.-Schmelzpunkt wird mittels eines differentiellen Abtastfcalοrimeters der Firma Perkin-Elmer, ITorwalk, Connecticut, USA, bestimmt, welcher eine Aufheizgeschwindigkeit von 160C pro Hinute auf v/eist.The copolymers of the invention are characterized by a melting point below 135 ° C. as determined by differential thermal analysis (DTA). The copolymers particularly suitable for the invention have DTA melting points below 125.degree. The DTA melting point is measured by a differential Abtastfcalοrimeters Perkin-Elmer, ITorwalk, Connecticut, USA, determines which a heating rate of 16 0 C per Hinute eist v /.
Die heißsiegelfähige Schicht kann mittels irgendeines bekannten Verfahrens auf die Polypropylenfolie aufgebracht werden. Man kann z.B. eine vorgefertigte Folie aus dem ungeordneten Copolymer mittels eines geeigneten Haft- oder Klebemittels auf die Polypropylenfolie schichten. Man kann auch die vorgefertigte Folie oder bevorzugte Folien in innigem Kontakt mit der Polypropylenfolie recken, wenn sich die Kombination unter Ausbildung einer einzigen Folie vereinigt. Man kann auch das ungeordnete Copolymere auf eine Oberfläche oder beide einer PoIyτ-The heat sealable layer can be applied to the polypropylene film by any known method. For example, you can make a prefabricated slide from the disordered Layer the copolymer onto the polypropylene film using a suitable adhesive or adhesive. You can also get the pre-made Stretch film or preferred films in intimate contact with the polypropylene film when the combination is under formation combined in a single film. You can also apply the disordered copolymer to one surface or both of a poly
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propylenfolie schmelzextrudieren, v/orauf man kühlt, bevor der Polypropylenfilm unter reekorientierungsfähigen Bedingungen gereckt bzw. gestreckt wird.Melt extrusion of propylene film before cooling before the Polypropylene film is stretched or stretched under re-orientable conditions.
Die heißsiegelfähige Kunststoffolie wird vorzugsweise ausgebildet, indem man die Polypropylenfolie mit einer Schicht oder zwei des ungeordneten Copolymeren durch eine Form mit schlitzförmig oder ringförmig ausgebildeter Öffnung coextrudiert, worauf man kühlt, löscht bzw. flachspritzt (quenching) und dann unter reekorientierungsfähigen Bedingungen reckt bzw. streckt.The heat-sealable plastic film is preferably formed by using the polypropylene sheet with a layer or two of the disordered copolymer through a mold slot-shaped or ring-shaped opening coextruded, what you cool, extinguish or spray flat (quenching) and then stretches or stretches under conditions capable of reekorientation.
Da das ungeordnete Copolymer mit Polypropylen verträglich ist, ist es möglich, eine kleine Menge an heißsiegelfähiger Äbfallfolie an den Extruder für die Polypropylenfolie zurückzuführen, ohne daß die Eigenschaften des Films dadurch wesentlich beeinträchtigt werden.Since the disordered copolymer is compatible with polypropylene, it is possible to heat-seal a small amount of it Return the waste film to the extruder for the polypropylene film, without significantly affecting the properties of the film.
Der heißsiegelfähige Kunststoffilin gemäß der Erfindung kann doppelt gelegt werden, d.h. zur Ausbildung eines Laminats mit nützlichen" Eigenschaften können zwei Filme übereinandergelegt werden, wobei sie mit einer Copolymerschicht an der anderen vereinigt werden.The heat-sealable plastic film according to the invention can That is, two films can be overlaid to form a laminate with useful "properties being combined with one co-polymer layer on the other.
Das Laminat kann ausgebildet werden, indem man Hitze und Druck einwirken läßt oder die zwei Folien reckt bzw. streckt, wenn diese sich in Oberflächenkontakt miteinander befinden.The laminate can be formed by applying heat and pressure, or by stretching the two sheets, when these are in surface contact with each other.
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Die Erfindung betrifft auch ein Verfahren zur Herstellung einer heißsiegelfähigen orientierten Kunststoffolie, bei dem man auf mindestens eine Oberfläche einer Polypropylenfolie eine Schicht aus einem überwiegend linearen unge ordne ten Copolymer aus Äthylen und bis zu 12 Mol-$ mindestens eines weiteren, wenigstens drei Kohlenstoffatome pro Molekül aufweisenden Alpha-Olefins aufbringt sowie die Kombination einen reckorientierungsfähigen Zustand bringt und in mindestens einer Richtung reckt bzw. streckt.The invention also relates to a method of manufacture a heat-sealable, oriented plastic film in which at least one surface of a polypropylene film a layer of a predominantly linear unordered copolymer of ethylene and up to 12 mol $ at least one further, having at least three carbon atoms per molecule Alpha-Olefins applies as well as the combination a stretch-orientable Brings state and stretches or stretches in at least one direction.
Die Erfindung wird im folgenden näher erläutert, wobei auf die Beispiele ■-Bezug genommen wird.The invention is explained in more detail below, reference being made to the examples.
Eine Polypropylencchmelze wurde bei einer Geschwindigkeit von 91»44 m/min mit äußeren Schichten einer Schmelze eines im v/esentlichen linearen ungeordneten Copolymeren zur Ausbildung eines dreischichtigen geschmolzenen Laminats mit einer Dicke von annähernd 300 Mikron durch eine Schlitzform eoextrudiert. Das Copolymer ist ein Handelsprodukt der Shell Chemicals (UK) Limited, London; Handelsbezeichnung: Carlona 40-045/09· Das Polypropylen bildet 90 ?* und jede Copolymersehieht 5 $ der Dicke. Das Copolymer weist einen D.T.A.-Schmelzpunkt von 1140C und eine Dichte von 0,940 auf. Es besteht aus Äthylen, das unter katalytischen niederdrücktedingungen mit etwa 2,5 Buten-1 copolymerisiert ist.A polypropylene melt was coextruded through a slot die at a rate of 91-44 m / min with outer layers of a melt of a substantially linear disordered copolymer to form a three-layer molten laminate approximately 300 microns thick. The copolymer is a commercial product from Shell Chemicals (UK) Limited, London; Trade name: Carlona 40-045 / 09 · The polypropylene is 90 ? * And each copolymer is 5 $ of the thickness. The copolymer has a DTA melting point of 114 0 C and a density of 0.940. It consists of ethylene which is copolymerized with about 2.5 butene-1 under catalytic depressed conditions.
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ITach. dem Extrudieren wird, das geschmolzene Laminat sofort in kaltem Wasser gekühlt (quenched), wird Einschließend auf 100 - 115°C erwärmt und um 20 fo zwischen einer Reihe von RoI-len in Arbeitsrichtung gereckt bzw. gestreckt. Die Rollen am Abgabeende wurden bei einer größeren Umfangsgeschwindigkeit gedreht als die Rollen am Eingangsende.ITach. After extrusion, the molten laminate is immediately cooled (quenched) in cold water, heated to 100-115 ° C and stretched by 20 ° between a series of rolls in the working direction. The rollers at the delivery end were rotated at a greater peripheral speed than the rollers at the input end.
Die monoaxial gereckte Folie wurde dann in eine Heißluftvorrichtung· (stenter) eingegeben, wo sie auf etwa 15O0G erwärmt wurde und in Querrichtung auf das Achtfache ihrer ursprünglichen Breite gereckt bzw. gestreckt wurde. Die nun biaxial orientierte"Folie wurde gekühlt, an. den Kanten geradegeschnitten und zu einer Rolle gewickelt. Der Film wies eine hohe Klarheit bzw. Transparenz auf und war etwa 30 lüikron dick.The monoaxially stretched film was then placed · (stenter) into a hot air apparatus, where it was heated to about 15O 0 G and was stretched in the transverse direction to eight times its original width and stretched. The now biaxially oriented film was cooled, cut straight at the edges and wound into a roll. The film had a high degree of clarity or transparency and was about 30 microns thick.
Es konnte gezeigt werden, daß Proben der 4FoHe sich in leichter '//eise bei 125°C unter einen Druck von .0,98 kg/cm in einer Sekunde miteinander versiegeln, wobei eine Heißsiegelfestigkeit von 600 g/38 mm Folienbreite er-zie.lt wird. Bei der Untersuchung der versiegelten Streifen zeigte sich, daß ein Verziehen des Films während der Si egejlmaß nähme nicht stattgefunden hatte.It could be shown that samples of the 4 foils seal themselves together easily at 125 ° C under a pressure of 0.98 kg / cm in one second, with a heat seal strength of 600 g / 38 mm foil width target is. Examination of the sealed strips showed that there was no warping of the film while it was being measured.
409816/0449409816/0449
-7--7-
Das Verfahren gemäß Beispiel 1 wurde wiederholt, mit der Ausnahme, daß das "Cariona"-Copolymer durch ein überwiegend lineares ungeordnetes Äthylen-Propylen-Copolymer ersetzt wurde, dessen Propylengehalt 4 MoI-^ beträgt. Das Copolymere war unter katalytischem Kiederdruckbedingungen hergestellt worden und wies eine Dichte von 0,950 sowie einen D.I1.A.-Schmelzpunkt von 1150G auf.The process of Example 1 was repeated with the exception that the "Cariona" copolymer was replaced by a predominantly linear, disordered ethylene-propylene copolymer, the propylene content of which is 4 mol- ^. The copolymer was prepared by catalytic Kiederdruckbedingungen and had a density of 0.950 and a DI-1 .A. melting point of 115 0 g.
Der von den Folienkanten nach der biaxialen Orientierung, jedoch vor dem Aufwickeln zu einer Holle abgeschnittene Abfall wurde zerkleinert, vermählen und in den Extruder für die Polypropylensohiaelze zurückgeführt.The waste cut from the edges of the film after biaxial orientation, but before being wound into a tube was crushed, ground and put in the extruder for the polypropylene resin layers returned.
Die Dicke der biaxial orientierten Folie betrug annähernd 30 Mikron. Die Folie konnte in leichter V/eise mit sich selbst bei 1180C unter einem Druck von 0,98 kg/cm in einer Sekunde mit sich selbst versiegelt werden, wobei man eine Eeißsiegelfestigkeit von 700 g/38 mm Folienbreite erhielt. Ein Verziehen der Folie trat während der Versxegelungsmaßnahinen nicht auf.The thickness of the biaxially oriented film was approximately 30 microns. The film could easily in V / else with itself at 118 0 C under a pressure of 0.98 kg / cm in one second are sealed to itself to obtain a Eeißsiegelfestigkeit of 700 g / 38 mm of film width received. The film did not warp during the pollution control measures.
Ein überwiegend lineares ungeordnetes Copolymer aus Äthylen und Buten-1, dessen Buten-1-Gehalt 3 Mo1-$ betrug,A predominantly linear, disordered copolymer of ethylene and 1-butene, the 1-butene content of which was 3 Mo1- $,
wurde zu einer Folie mit einer Dicke von O,O?63 mm vergossen; Das Copolymere, war unter katalytischer* lliederdruckbedingungen hergestellt worden und wies eine Dichte von C,930 sowie einen D.T.A.-Schmelzpunkt von 117°C auf.was cast into a film with a thickness of 0.03 to 63 mm; The copolymer was under catalytic low pressure conditions and had a density of C.930 as well as a D.T.A. melting point of 117 ° C.
Die gegossene Copolymerfolie wurde dann auf eine gegossene Polypropylenfolie mit einer Dicke von T,016 mm geschichtet,
wobei die Anordnung auf 140 C erhitzt und einem Druck vonThe cast copolymer film was then laminated onto a cast polypropylene film having a thickness of T.016 mm,
the arrangement being heated to 140 C and a pressure of
p ■p ■
17,5 kg/cm ausgesetzt wurde.17.5 kg / cm.
Das erhaltene Laminat, wurde dann auf eine Temperatur von
1600G erhitzt und gleichzeitig um 700 >
in zwei senkrecht
aufeinanderstehenden Richtungen gereckt, wobei ein biaxial
orientiertes Laminat erhalten wurde.The laminate obtained was then heated to a temperature of
160 0 G heated and at the same time by 700> in two perpendicularly
aligned directions, with a biaxial
oriented laminate was obtained.
Das Laminat konnte mit der einen Copolymerseite an der anderen in'leichter Weise mit sich selbst bei 1200G unter einemThe laminate could with one copolymer side on the other in'eightly way with itself at 120 0 G under one
Druck von 0,98 kg/cm in einer Sekunde versiegelt werden, wobei man eine Heißsiegelfestigkeit von 1CÖ0 g/38 mm Folienbreite erhielt. Ein Verziehen der Folie als Ergebnis der Heißsiegelmaßnahmen trat nicht auf. . Pressure of 0.98 kg / cm can be sealed in one second, with a heat seal strength of 1CO0 g / 38 mm film width received. There was no warping of the film as a result of the heat sealing measures. .
4098 16/04494098 16/0449
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4769772A GB1440317A (en) | 1972-10-17 | 1972-10-17 | Heat-sealable plastics films |
Publications (2)
Publication Number | Publication Date |
---|---|
DE2351923A1 true DE2351923A1 (en) | 1974-04-18 |
DE2351923B2 DE2351923B2 (en) | 1981-08-06 |
Family
ID=10445950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2351923A Ceased DE2351923B2 (en) | 1972-10-17 | 1973-10-16 | Heat sealable, oriented plastic film |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS5719151B2 (en) |
AT (1) | AT331525B (en) |
BE (1) | BE806151A (en) |
CA (1) | CA1009098A (en) |
DE (1) | DE2351923B2 (en) |
FR (1) | FR2202916B1 (en) |
GB (1) | GB1440317A (en) |
IT (1) | IT997766B (en) |
LU (1) | LU68631A1 (en) |
NL (1) | NL177672B (en) |
SE (1) | SE408867B (en) |
Families Citing this family (37)
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JPS5268279A (en) * | 1975-12-04 | 1977-06-06 | Toyobo Co Ltd | Composite films of polypropylene withexcellent processability |
JPS52125586A (en) * | 1976-02-28 | 1977-10-21 | Gunze Kk | Bi axial oriented composite film having good low temperature heat seal property |
JPS5837907B2 (en) * | 1976-02-28 | 1983-08-19 | グンゼ株式会社 | Easy heat-sealable biaxially stretched composite film |
JPS52109580A (en) * | 1976-03-10 | 1977-09-13 | Gunze Kk | Polypropylene bi axial oriented composite films having good low temperature heat seal property |
JPS52135386A (en) * | 1976-05-08 | 1977-11-12 | Gunze Kk | Laminated film with good low temperature heat seal property |
JPS5312971A (en) * | 1976-07-22 | 1978-02-06 | Honshu Paper Co Ltd | Polypropylene composite film having antistatic and low temperature heat seal property and its production |
JPS5321688A (en) * | 1976-08-10 | 1978-02-28 | Toray Ind Inc | Automatic packaging laminate film |
JPS5345389A (en) * | 1976-10-05 | 1978-04-24 | Gunze Kk | Production of polypropylene bi axial oriented multiilayer film protected printed side |
JPS5386780A (en) * | 1977-01-12 | 1978-07-31 | Gunze Kk | Excellent lowwtemperature heattsealable twooaxis oriented composite film |
IT1075393B (en) * | 1977-04-13 | 1985-04-22 | Sir Soc Italiana Resine Spa | FLEXIBLE COUPLED FILMS FOR THE PACKAGING OF FOOD PRODUCTS |
JPS6031673B2 (en) | 1977-04-15 | 1985-07-23 | 東レ株式会社 | Three layer laminated polypropylene film |
GB1566077A (en) * | 1977-05-06 | 1980-04-30 | British Cellophane Ltd | Heat-sealable polypropylene film |
US4125662A (en) * | 1977-10-03 | 1978-11-14 | Mobil Oil Corporation | Packaging film with improved heat sealability |
US4147827A (en) * | 1977-11-04 | 1979-04-03 | Mobil Oil Corporation | Coextruded heat sealable laminar thermoplastic films |
US4505969A (en) * | 1977-12-14 | 1985-03-19 | Mobil Oil Corporation | Oriented polypropylene with linear low density poly-ethylene copolymer coating |
CA1157617A (en) * | 1977-12-14 | 1983-11-29 | Milton L. Weiner | Oriented polypropylene with linear low density polyethylene copolymer coating |
US4303709A (en) | 1977-12-27 | 1981-12-01 | Mobil Oil Corporation | Coextruded laminar thermoplastic bags |
JPS5512008A (en) * | 1978-06-29 | 1980-01-28 | Mitsui Petrochemical Ind | Packing laminate sack |
GB2029317A (en) * | 1978-09-06 | 1980-03-19 | British Cellophane Ltd | Heat-sealable polypropylene films |
GB2030927A (en) | 1978-09-19 | 1980-04-16 | British Cellophane Ltd | Heta-selable antistatic polypropylene films |
JPS5755078Y2 (en) * | 1978-12-26 | 1982-11-29 | ||
EP0023389B1 (en) | 1979-07-27 | 1984-11-14 | Imperial Chemical Industries Plc | Metallized films and method of producing them |
JPS5672953A (en) * | 1979-11-19 | 1981-06-17 | Mitsubishi Petrochemical Co | Composite film having excellent hot tacking property |
US4390385A (en) * | 1980-05-23 | 1983-06-28 | W. R. Grace & Co., Cryovac Div. | Heat sealable, multi-ply polypropylene film |
DE3041286C1 (en) * | 1980-11-03 | 1982-07-22 | Hoechst Ag, 6000 Frankfurt | Sealable, biaxially stretched polypropylene film with high scratch resistance and process for its production |
JPS57123053A (en) * | 1981-01-23 | 1982-07-31 | Mitsui Petrochemical Ind | Composite film |
JPS57146653A (en) * | 1981-03-05 | 1982-09-10 | Gunze Kk | Film for printed lamination |
US4384024A (en) * | 1981-03-19 | 1983-05-17 | Imperial Chemical Industries Limited | Composite heat-sealable films |
JPS57157349U (en) * | 1981-03-30 | 1982-10-02 | ||
AT383542B (en) * | 1985-01-25 | 1987-07-10 | Harald Dipl Ing Schobermayr | STIFF MOLDED BODY COMPRISED ORIENTED PLASTIC CARRIER AND METHOD FOR THE PRODUCTION THEREOF |
GB8613163D0 (en) * | 1986-05-30 | 1986-07-02 | Exxon Chemical Patents Inc | Sealable films |
GB8808890D0 (en) * | 1988-04-15 | 1988-05-18 | Grace W R & Co | Container closure caps & compositions for forming gaskets for them |
US5077121A (en) * | 1988-10-27 | 1991-12-31 | Shell Oil Company | High strength high modulus polyolefin composite with improved solid state drawability |
EP0435789A3 (en) * | 1989-12-28 | 1992-08-12 | American National Can Company | Sealant blends for flexible packaging |
US5698279A (en) * | 1992-09-23 | 1997-12-16 | Viskase Corporation | Heat shrinkable nylon food casing having a functionalized ethylenic polymer core layer |
JPH09155823A (en) * | 1995-12-04 | 1997-06-17 | Tetra Co Ltd | Concrete vibrator |
CN103153581B (en) | 2010-10-15 | 2015-08-26 | 埃克森美孚化学专利公司 | Form the method for the blend of polyolefin and modifier |
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BE625957A (en) * | 1961-10-02 |
-
1972
- 1972-10-17 GB GB4769772A patent/GB1440317A/en not_active Expired
-
1973
- 1973-10-12 CA CA183,234A patent/CA1009098A/en not_active Expired
- 1973-10-15 NL NLAANVRAGE7314157,A patent/NL177672B/en active Search and Examination
- 1973-10-16 DE DE2351923A patent/DE2351923B2/en not_active Ceased
- 1973-10-16 JP JP11625773A patent/JPS5719151B2/ja not_active Expired
- 1973-10-16 SE SE7314055A patent/SE408867B/en unknown
- 1973-10-16 BE BE136756A patent/BE806151A/en not_active IP Right Cessation
- 1973-10-16 IT IT53159/73A patent/IT997766B/en active
- 1973-10-16 LU LU68631A patent/LU68631A1/xx unknown
- 1973-10-16 AT AT879673A patent/AT331525B/en not_active IP Right Cessation
- 1973-10-17 FR FR7336994A patent/FR2202916B1/fr not_active Expired
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Also Published As
Publication number | Publication date |
---|---|
JPS49101420A (en) | 1974-09-25 |
FR2202916A1 (en) | 1974-05-10 |
GB1440317A (en) | 1976-06-23 |
NL7314157A (en) | 1974-04-19 |
FR2202916B1 (en) | 1976-06-18 |
AT331525B (en) | 1976-08-25 |
AU6139173A (en) | 1975-04-17 |
NL177672B (en) | 1974-04-19 |
BE806151A (en) | 1974-04-16 |
ATA879673A (en) | 1975-11-15 |
IT997766B (en) | 1975-12-30 |
CA1009098A (en) | 1977-04-26 |
SE408867B (en) | 1979-07-16 |
DE2351923B2 (en) | 1981-08-06 |
LU68631A1 (en) | 1973-12-27 |
JPS5719151B2 (en) | 1982-04-21 |
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8227 | New person/name/address of the applicant |
Free format text: BCL LTD., BRIDGWATER, SOMERSET, GB |
|
8228 | New agent |
Free format text: MOLL, W., DIPL.-PHYS. DR.RER.NAT. GLAWE, U., DIPL.-PHYS. DR.RER.NAT., 8000 MUENCHEN DELFS, K., DIPL.-ING. MENGDEHL, U., DIPL.-CHEM. DR.RER.NAT. NIEBUHR, H., DIPL.-PHYS. DR.PHIL.HABIL., PAT.-ANW., 2000 HAMBURG |
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8235 | Patent refused |