WO1998014327A1 - Laminats et films de polyolefines - Google Patents

Laminats et films de polyolefines Download PDF

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Publication number
WO1998014327A1
WO1998014327A1 PCT/IB1997/001182 IB9701182W WO9814327A1 WO 1998014327 A1 WO1998014327 A1 WO 1998014327A1 IB 9701182 W IB9701182 W IB 9701182W WO 9814327 A1 WO9814327 A1 WO 9814327A1
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WO
WIPO (PCT)
Prior art keywords
polyolefin
interpolymer
layer
structural layer
laminate
Prior art date
Application number
PCT/IB1997/001182
Other languages
English (en)
Inventor
Craig Andrew Wilson
Atle Flom
Original Assignee
Elopak Systems Ag
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 Elopak Systems Ag filed Critical Elopak Systems Ag
Priority to AU42177/97A priority Critical patent/AU4217797A/en
Priority to JP10516346A priority patent/JP2001501145A/ja
Publication of WO1998014327A1 publication Critical patent/WO1998014327A1/fr

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Classifications

    • 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
    • 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
    • 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • 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
    • B32B2323/04—Polyethylene
    • B32B2323/043—HDPE, i.e. high density polyethylene
    • 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
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • 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
    • 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
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C08L23/0861—Saponified vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Definitions

  • This invention relates to one or more layers, to a method of producing the same and to a method of using the same.
  • the invention is concerned particularly, but not exclusively, with one or more layers in the form of a web suitable for thermoforming, especially a packaging laminate to be thermofor ed.
  • thermoforming systems for sheet-form packaging material, substances such as polypropylene (PP) , polystyrene (PS) , polyester and combinations thereof.
  • PP polypropylene
  • PS polystyrene
  • tray-forming systems in which a single sheet is formed using heat and pressure and/or vacuum; these tray-forming systems include systems in which the tray is formed on a form-fill-seal (FFS) machine.
  • FFS form-fill-seal
  • Other systems are those in which two sheets (which may be two separate webs or a single web folded upon itself) are thermoformed in a mould and sealed together around outlines of the containers, or sealed around the outlines and then thermoformed in the mould.
  • WO-A- 95/21743 discloses a multilayer film, of a thickness of between 40 and 130 microns, and a pouch containing a flowable material.
  • the multilayer film is made from two layers of a sealant film with an interposed layer of a polyethylene.
  • the sealant film is made from a material comprising 10 to 100 parts by weight of a copolymer of ethylene and at least one C 4 -C 10 alpha-olefin manufactured in a polymerization process using a single-site polymerization catalyst and from 0 to 90 parts by weight of at least one polymer selected from the group consisting of a linear copolymer of ethylene and at least one C 4 -C 10 alpha-olefin having a density of from 0.900 to 0.930 g/cm and a melt index of from 0.3 to 2.0, a high- pressure polyethylene having a density of from 0.916 to 0.930 g/cm and a melt index of from about 1 to 10, and blends thereof.
  • the polyethylene of the interposed layer is a high density polyethylene with a density of at least 0.930 g/cm and a melt index of less than 5.
  • the pouch is made from the multilayer film and has transversely sealed ends. The pouches are particularly useful in the packaging of flowable materials e.g. milk, especially using a vertical form, fill and seal apparatus.
  • High density polyethylene as generally used in extrusion of film, which is not subsequently to be thermoformed, is typically of Type III or IV, Categories 4 and 5, as defined in ASTM (American Society for Testing and Materials) D1248-84. It is known to increase the melt strength of the HDPE by increasing the average molecular weight .
  • HDPE as generally used in sheet extrusion for subsequent thermoforming is typically of Type III or IV, Category 3 (ASTM D1248-84) .
  • Such HDPE has poor thermoforming characteristics and, on blow-thermoforming machines in which two HDPE strips are brought together and blow-thermoformed, has poor sealing characteristics.
  • Its poor thermoforming characteristics arise from its low melt strength - the portion of the visco-elastic plateau which is suitable for thermoforming is narrower than is desirable.
  • Its poor sealing characteristics arise from its having a seal-initiation temperature which is above its thermoforming temperature plateau and its having a low melt strength at its sealing temperature, such that the sealing pressure of sealing jaws, for example, causes them to penetrate through the HDPE.
  • HDPE is desirable as a packaging substance for a number of reasons, for example because it is readily acceptable in recycling schemes and waste disposal systems, is readily available and inexpensive, and is relatively light in specific weight.
  • a method comprising providing a laminate comprising a structural layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and a sealant layer compatible in melt mergibility with said structural layer, having a seal- initiation temperature lower than that of said structural layer and comprised of a second polyolefin, or an interpolymer thereof, and thermoforming said laminate.
  • a method comprising providing a laminate comprising a structural layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and a sealant layer compatible in melt mergibility with said structural layer, having a seal- initiation temperature lower than the thermoforming temperature plateau of said structural layer and comprised of a second polyolefin, or an interpolymer thereof, and thermoforming said laminate.
  • a laminate similar to laminates known as films can be manufactured of sheet thickness suitable for thermoforming.
  • the advantage of using the first polyolefin or the interpolymer thereof, as set out above, is that it thermoforms well, so that it is possible to form containers, e.g. trays, with very high barrier to transmission of water vapour as well as good hot fill capabilities.
  • the inclusion of the sealant layer has the advantage that the processing on FFS machines is significantly improved.
  • a method comprising co-extruding through a flat slot die a first polyolefin, or an interpolymer thereof, which is of low melt index and is multi-modal in molecular weight distribution, and a second polyolefin, or an interpolymer thereof, to provide a laminate comprising a structural layer comprised of said first polyolefin, or said interpolymer thereof, and a sealant layer comprised of said second polyolefin or said interpolymer thereof, having a seal-initiation temperature lower than that of said structural layer and compatible in melt mergibility with said structural layer.
  • a method comprising co-extruding through a flat slot die a first polyolefin, or an interpolymer thereof, which is of low melt index and is multi-modal in molecular weight distribution, and a second polyolefin, or an interpolymer thereof, to provide a laminate comprising a structural layer comprised of said first polyolefin, or said interpolymer thereof, and a sealant layer comprised of said second polyolefin or said interpolymer thereof, having a seal-initiation temperature lower than the thermoforming temperature plateau of said structural layer and compatible in melt mergibility with said structural layer.
  • a laminate comprising a structural layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and a sealant layer compatible in melt mergibility with said structural layer, having a seal- initiation temperature lower than that of said structural layer and comprised of a second polyolefin, or an interpolymer thereof, the substance of said structural layer being multi-modal in short chain branching distribution.
  • a laminate comprising a structural layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and a sealant layer compatible in melt mergibility with said structural layer, having a seal- initiation temperature lower than the thermoforming temperature plateau of said structural layer and comprised of a second polyolefin, or an interpolymer thereof, the substance of said structural layer being multi-modal in short chain branching distribution.
  • a structural layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution
  • a sealant layer compatible in melt mergibility with said structural layer, having a seal- initiation temperature lower than the thermoforming temperature plateau of said structural layer and comprised of a second polyolefin, or an interpolymer thereof, the substance of said structural layer being multi-modal in short chain branching distribution.
  • a laminate comprising a structural layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and a sealant layer compatible in melt mergibility with said structural layer, having a seal- initiation temperature lower than that of said structural layer and comprised of a second polyolefin, or an interpolymer thereof, said structural layer incorporating a minor amount of a homogeneous polyolefin which is compatible in melt mergibility with said first polyolefin.
  • a laminate comprising a structural layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and a sealant layer compatible in melt mergibility with said structural layer, having a seal- initiation temperature lower than the thermoforming temperature plateau of said structural layer and comprised of a second polyolefin, or an interpolymer thereof, said structural layer incorporating a minor amount of a homogeneous polyolefin which is compatible in melt mergibility with said first polyolefin.
  • a layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and which incorporates a minor amount of a homogeneous polyolefin which is compatible in melt mergibility with said first polyolefin.
  • a method comprising a layer comprised of a first polyolefin, or an interpolymer thereof, which is of a low melt index and is multi-modal in molecular weight distribution, and which incorporates a minor amount of a homogeneous polyolefin which is compatible in melt mergibility with said first polyolefin, and thermoforming said layer.
  • a homogeneous polyolefins generally are noted for their low melt strength, the incorporation of the homogeneous polyolefin in the
  • the layer may be in the form of a monolayer or may be one layer of a laminate.
  • the laminate may include a sealant layer, one or more tie layers, or a barrier layer (such as EVOH or PA) ; it could also contain additives (such as peelability additives, pigments, UV filters, oxygen scavengers, and anti-microbial agents) .
  • the monolayer or the laminate is preferably of a thickness of at least 100 microns, more preferably of a thickness of at least 200 microns, so that it constitutes sheet rather than film.
  • the melt index of the first polyolefin is preferably lower than 0.8g/10mins . , especially lower than 0.45g/10mins . , at ASTM D1238-95, Conditions 190/2.16 for HDPE, and preferably lower than 8g/10mins, especially lower than 5g/10mins, at ASTM D1238-95, Conditions 230/2.16 for PP.
  • the substance of the monolayer or the structural layer is multi-modal (e.g. bi-modal) in short chain branching distribution.
  • the first polyolefin may comprise PP, but preferably comprises HDPE of Type III or IV, Category 4 or 5, preferably Category 5, of ASTM D1248-84. That HDPE has the advantage of having very good impact properties down to temperatures of minus 80°C.
  • the first polyolefin may be modified by incorporating a minor amount of a homogeneous polyolefin which is compatible in melt mergibility with the first polyolefin.
  • the homogeneous polyolefin may be PP or PE where the first polyolefin is PP or HDPE, and is preferably present in an amount of between 2 and 50% by weight, particularly between 10 and 30% by weight.
  • this modification improves the thermoformability of the laminate .
  • the polyolefin of the sealant layer would advantageously comprise PP or PE in the event that the polyolefin of the structural layer comprises PP, or would advantageously comprise PE in the event that the polyolefin of the structural layer comprises HDPE.
  • the polyolefin of the sealant layer preferably comprises an interpolymer of PP; in the latter event, it preferably comprises LDPE (low density polyethylene) or LLDPE (linear low density polyethylene) or homogeneous PE or blends thereof, and optionally may include one or more additives, for example a peelability additive, e.g. polybutylene or ionomer .
  • the sealant layer should have a seal- initiation temperature at least 1°C, preferably at least 5°C, below the thermoforming temperature plateau, preferably the seal-initiation temperature, of the structural layer.
  • Homogeneous polyolefins are polyolefins which, in respect of their compositions and/or manufacture, are best exemplified by Elston in US-A-3645992; Canich in US-A-5026798 and US-A-5055438; Stevens et al. in US-A-5064802; and by the products known as "TAFMER”® available from Mitsui Petrochemical Co. Ltd. , "AFFINITY”® and “ENGAGE”® available from The Dow Chemical Company and the metallocene polyethylenes manufactured using the "EXPOL”® process by Exxon Corporation.
  • the present laminate is particularly, but not exclusively, applicable to FFS machines.
  • a packaging laminar web is formed by co-extrusion of, in order from the outside to the inside, an HDPE blend [of HDPE (grade reference HDPE 35057E as supplied by The Dow Chemical Company) 86%, "AFFINITY”® PL1880 homogeneous PE 10% and Cabot PE7024 white pigment masterbatch 4% by weight], a PE graft interpolymer tie layer, an EVOH (ethylene vinyl alcohol) barrier layer, a PE graft interpolymer tie layer, and an LDPE blend [of LDPE (grade reference "LACQUTENE” LD0304 as supplied by Atochem) 84% and Shell PB8240 polybutylene 16% for peelability] , to provide a laminate of an HDPE blend structural layer 270 microns thick, an outer tie layer 15 microns thick, an EVOH barrier layer 20 microns thick, an inner tie layer 15 microns thick and an LDPE blend sealant
  • the outer and inner tie layers and the barrier layer may be omitted, because the HDPE blend readily heat-merges with the LDPE blend (it being generally known that HDPE readily heat-merges with LDPE) .

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

Cette invention consiste à mélanger une première polyoléfine, ou un interpolymère de celle-ci, qui possède un faible indice de fusion et des modes multiples dans la répartition du poids moléculaire, avec une polyoléfine homogène qui est compatible avec la première en ce qui concerne sa capacité à s'amalgamer à l'état fondu. Le mélange est ensuite co-extrudé ou extrudé à l'aide d'une filière à fente fine avec ou sans une seconde polyoléfine, ou un interpolymère de celle-ci, ceci de manière à obtenir un laminât ou une monocouche. Le laminât comprend une couche structurelle se composant de la première polyoléfine ou de l'interpolymère de celle-ci, ainsi qu'une couche d'étanchéité se composant de la seconde polyoléfine ou de l'interpolymère de celle-ci. Cette dernière couche possède une température d'initiation d'étanchéité qui est inférieure à celle de la couche structurelle, ou au moins inférieure au plateau de température de thermoformage de cette dernière. Cette couche d'étanchéité est en outre compatible avec la couche structurelle en ce qui concerne sa capacité à s'amalgamer à l'état fondu. Cette monocouche ou se laminât conviennent tout particulièrement au thermoformage dans des conteneurs.
PCT/IB1997/001182 1996-10-02 1997-09-29 Laminats et films de polyolefines WO1998014327A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU42177/97A AU4217797A (en) 1996-10-02 1997-09-29 Polyolefin films and laminates
JP10516346A JP2001501145A (ja) 1996-10-02 1997-09-29 ポリオレフィンフィルム及び積層体

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9620651.1A GB9620651D0 (en) 1996-10-02 1996-10-02 A laminate
GB9620651.1 1996-10-02

Publications (1)

Publication Number Publication Date
WO1998014327A1 true WO1998014327A1 (fr) 1998-04-09

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Application Number Title Priority Date Filing Date
PCT/IB1997/001182 WO1998014327A1 (fr) 1996-10-02 1997-09-29 Laminats et films de polyolefines

Country Status (5)

Country Link
JP (1) JP2001501145A (fr)
AU (1) AU4217797A (fr)
GB (1) GB9620651D0 (fr)
WO (1) WO1998014327A1 (fr)
ZA (1) ZA978782B (fr)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2154634A1 (fr) * 1971-09-28 1973-05-11 Du Pont Canada
JPS52109580A (en) * 1976-03-10 1977-09-13 Gunze Kk Polypropylene bi axial oriented composite films having good low temperature heat seal property
JPS54135875A (en) * 1978-04-14 1979-10-22 Mitsui Toatsu Chem Inc Laminated film
US4339498A (en) * 1979-10-05 1982-07-13 Mobil Oil Corporation Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of olefin copolymer or interpolymer
EP0339989A2 (fr) * 1988-04-29 1989-11-02 Shell Oil Company Compositions de polyéthylène à basse densité et de polybutène-1
EP0517222A2 (fr) * 1991-06-05 1992-12-09 Hoechst Aktiengesellschaft Masse de moulage à base de polyéthylène
EP0564206A2 (fr) * 1992-03-30 1993-10-06 Terumo Kabushiki Kaisha Récipient médical
EP0588208A2 (fr) * 1992-09-12 1994-03-23 Hoechst Aktiengesellschaft Masse à mouler à base de polyoléfine à large plage de fusion, procédé pour la préparation et son utilisation
US5360648A (en) * 1993-06-24 1994-11-01 The Dow Chemical Company Pouch for packaging flowable materials
US5382631A (en) * 1988-09-30 1995-01-17 Exxon Chemical Patents Inc. Linear ethylene interpolymer blends of interpolymers having narrow molecular weight and composition distributions
WO1995021743A1 (fr) * 1994-02-08 1995-08-17 Dupont Canada Inc. Feuille copolymere ethylenique multicouche
EP0697436A1 (fr) * 1994-08-09 1996-02-21 Montell Technology Company bv Composition thermoplastique contenant de polypropylène atactique et syndiotactique
WO1996016119A1 (fr) * 1994-11-14 1996-05-30 The Dow Chemical Company Compositions d'extrusion a etirage eleve et a faible striction

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2154634A1 (fr) * 1971-09-28 1973-05-11 Du Pont Canada
JPS52109580A (en) * 1976-03-10 1977-09-13 Gunze Kk Polypropylene bi axial oriented composite films having good low temperature heat seal property
JPS54135875A (en) * 1978-04-14 1979-10-22 Mitsui Toatsu Chem Inc Laminated film
US4339498A (en) * 1979-10-05 1982-07-13 Mobil Oil Corporation Heat sealable packaging film comprising propylene polymer substrate and a surface layer blend of olefin copolymer or interpolymer
EP0339989A2 (fr) * 1988-04-29 1989-11-02 Shell Oil Company Compositions de polyéthylène à basse densité et de polybutène-1
US5382631A (en) * 1988-09-30 1995-01-17 Exxon Chemical Patents Inc. Linear ethylene interpolymer blends of interpolymers having narrow molecular weight and composition distributions
EP0517222A2 (fr) * 1991-06-05 1992-12-09 Hoechst Aktiengesellschaft Masse de moulage à base de polyéthylène
EP0564206A2 (fr) * 1992-03-30 1993-10-06 Terumo Kabushiki Kaisha Récipient médical
EP0588208A2 (fr) * 1992-09-12 1994-03-23 Hoechst Aktiengesellschaft Masse à mouler à base de polyoléfine à large plage de fusion, procédé pour la préparation et son utilisation
US5360648A (en) * 1993-06-24 1994-11-01 The Dow Chemical Company Pouch for packaging flowable materials
WO1995021743A1 (fr) * 1994-02-08 1995-08-17 Dupont Canada Inc. Feuille copolymere ethylenique multicouche
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ZA978782B (en) 1998-04-17
JP2001501145A (ja) 2001-01-30
AU4217797A (en) 1998-04-24
GB9620651D0 (en) 1996-11-20

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