WO1997048554A1 - Compositions d'etancheite et couches de scellage detachables - Google Patents

Compositions d'etancheite et couches de scellage detachables Download PDF

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Publication number
WO1997048554A1
WO1997048554A1 PCT/US1997/010625 US9710625W WO9748554A1 WO 1997048554 A1 WO1997048554 A1 WO 1997048554A1 US 9710625 W US9710625 W US 9710625W WO 9748554 A1 WO9748554 A1 WO 9748554A1
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WO
WIPO (PCT)
Prior art keywords
polymer
crystalline
composition
linear ethylene
homogeneously branched
Prior art date
Application number
PCT/US1997/010625
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English (en)
Inventor
Laura K. Mergenhagen
Pak-Wing S. Chum
Jose V. Saavedra
Timothy J. Pope
Original Assignee
The Dow Chemical Company
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 The Dow Chemical Company filed Critical The Dow Chemical Company
Priority to AU34030/97A priority Critical patent/AU3403097A/en
Publication of WO1997048554A1 publication Critical patent/WO1997048554A1/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
    • B32B27/06—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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • 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
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • 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
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
    • C09K2200/0615—Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09K2200/0617—Polyalkenes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
    • C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
    • C09K2200/0615—Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C09K2200/0617—Polyalkenes
    • C09K2200/062—Polyethylene

Definitions

  • the present invention relates to an olefin composition having easy open heat seal characteristics and to a sealant film layer comprising a plurality of olefin polymers
  • this invention pertains to a peelable seal composition comprised of a homogeneously branched ethylene polymer and minor amounts of two different olefin polymers.
  • the most common non-glassine liners are coextrusions of HDPE with an ethylene vinyl acetate (EVA) -based seal layer (approximately 18 to 20 weight % VA EVA) .
  • EVA ethylene vinyl acetate
  • Other known liners include a zinc lonomer in the sealant layer.
  • Still another known liners include coextrusions of high density polyethylene (HDPE) , nylon, and an lonomer-based sealant.
  • the key performance requirements for cereal box liners include moisture barrier, low temperature sealability and good hot tack strength for high line speeds on VFFS packaging lines, abuse resistance, and good taste/ odor performance. There is also the desire to reduce cost via downgaugmg. This last requirement translates to a need for the sealant layer to contribute to the overall toughness of the structure, especially when very irregularly-shaped cereals are to be packaged.
  • a peelable seal is a heat seal with a defined force, generally in the range of 1 to 10 lb/in for flexible packaging. More specifically, for cereal packaging, a heat seal strength in the range of 1 to 3 lb/in is common, although the target varies according to individual manufacturer's requirements Controlled, peelable heat seals are desired in flexible packaging applications, such as cereal box liners, cake mix liners, cracKer tubes, and snacks, because they offer integrity (hermetic seals) to ensure quality, but also allow for easy access to the product without the use of tools or destruction of the package.
  • peelable seal compositions and sealant layer films generally include blends such as, for example, lonomer/ EVA compositions, EVA/ Polybutylene (PB) compositions, Ethylene acrylic acid (EAA) copolymer/ EVA compositions, EAA/ PB compositions, and even EVA/ PB/ polypropylene (PP) compositions.
  • PB Polybutylene
  • EAA Ethylene acrylic acid
  • PP polypropylene
  • packages In cereal packaging, packages must withstand puncture from irregularly-shaped cereal. Also, as packages are downgauged to improve economics, puncture resistance of the sealant becomes more important. Also, for cereal packaging, the majority of packages are based on HDPE and, therefore, optics are of a lesser concern. For niche applications where package appearance is a key performance requirement, sealant layers and film structures or liners with improved optical properties are desired. A low heat seal initiation temperature is desirable for obtaining faster packaging line speeds. A broad seal range, or a range of temperatures where ultimate seal strength is constant, is desired. This allows packagers to compensate for packaging equipment that is not precisely tuned m terms of seal temperatures. Also, it allows the package to be more forgiving to changes in packaging speeds . Another property, hot tack, is important in vertical form/fill/seal packaging.
  • COF coefficient of friction
  • compositions based on homogeneously branched polyolefin plastomers admixed with a plurality of polymer having different relative crystallinities offer improved performance as peelable seal compositions and sealant film layers.
  • Film layers comprised of such compositions exhibit low seal initiation temperatures, good heat seal strengths, and excellent hot tack performance.
  • they offer outstanding optics and abuse resistance and good taste and odor characteristics.
  • Their performance characteristics, as sealant layers for liners, closely match the requirements for dry food packaging applications.
  • One aspect of the present invention is a peelable sealant composition
  • a peelable sealant composition comprising at least one homogeneously branched ethylene plastomer, a minor amount of at least one amorphous or elastomeric polymer and a lesser amount of at least one substantially crystalline or crystalline polymer.
  • Another aspect of the present invention is a film having at least one peelable sealant film layer, the at least one peelable sealant film layer comprising at least one homogeneously branched ethylene plastomer, a minor amount of at least one amorphous or elastomeric polymer and a lesser amount of at least one substantially crystalline or crystalline polymer.
  • Another aspect of the present invention is m a method for making a peelable seal film structure having at least two layers, comprising the steps of:
  • Another aspect of the present invention is a peelable seal film structure comprising at least one peelable sealant film layer and at least one additional film layer wherein the additional film layer is selected from the group consisting of a polyamide, polyethylene, polypropylene and polycarbonate and the peelable sealant film layer comprising at least one homogeneously branched ethylene plastomer, a minor amount of at least one amorphous or elastomeric polymer and a lesser amount of at least one substantially crystalline or crystalline polymer.
  • compositions and sealant film layers of the present invention offer the advantages of minimum off-odor characteristics and excellent optical properties compared to other specialty sealant polymers.
  • One of the surprising results of the present invention is that the compositions and sealant film layers of the present invention maintain the low seal initiation characteristics of the homogeneously branched ethylene plastomer.
  • amorphous or elastomeric polymer as used herein is used m the conventional sense and refers to polymers having a relative crystallinity less than about 30 percent, preferably less than about 25 percent, more preferably less than about 15 percent, and most preferably less than about 10 percent as determined using X-ray diffraction techniques.
  • substantially crystallinity or crystalline refers to polymers having a relative crystallinity greater than about 30 percent, preferably greater than about 45 percent, more preferably greater than about 55 percent, and most preferably greater than about 65 percent as determined using X-ray diffraction techniques.
  • a combination of polyolefin plastomer with a minor amount of an amorphous or elastomeric polymer and a lesser amount of a substantially crystalline or crystalline polymer exhibit improved peelable seal behavior. Blend ratios can be chosen to reach a target peel strength based on the seal performance requirements for a specific application.
  • the weight percent of the amorphous or elastomeric polymer will be from about 1 to less than about 50 weight percent, preferably from about 4 to about 45 weight percent, more preferably from about 15 to about 42 weight percent and most preferably from about 30 to about 40 weight percent.
  • the weight percent of the substantially crystalline or crystalline polymer will be from about 1 to about 20 weight percent, preferably from about 2 to about 16 weight percent, more preferably from about 2 to about 12 weight percent and most preferably from about 3 to about 9 weight percent.
  • the homogeneously branched ethylene plastomer can be a substantially linear ethylene interpolymer or a homogeneously branched linear ethylene polymer.
  • plastomer it is meant the polymer is a semi- crystalline polymer of such a relative crystallinity that it would not be generally recognized as an elastomer or amorphous polymer.
  • the subset that would be recognized as a plastomer generally have polymer densities greater than about 0.89 g/cc and are supplied by The Dow Chemical Company under the designation AFFINITY polyolefin plastomers.
  • Suitable homogeneously branched linear ethylene polymers are supplied by Mitsui Petrochemical under the designation TAFMER resin and by Exxon Chemical Corporation under the designations EXACT resins and EXCEED resins.
  • Suitable amorphous or elastomeric polymers for use in the present invention include, but are not limited to, atactic polypropylene resins, atactic poly (1-butene) resins, and homogeneously branched ethylene elastomers .
  • Preferred amorphous or elastomer polymers are substantially linear ethylene polymers and are supplied by Dupont Dow Elastomers under the designation ENGAGE polyolefin elastomers.
  • Suitable substantially crystalline or crystalline polymers for us in the present invention include, but are not limited to, polypropylene resins, polyethylene resms, polyamides, polybutylene resins and polycarbonates.
  • Preferred polypropylene resins for use m the present invention as the at least one substantially crystalline or crystalline polymer are isotactic or syndiotactic polypropylene resms.
  • Suitable polybutylene resms are isotactic poly (1-butene) homopolymers and isotactic poly (1-butene-ethylene) copolymers such those supplied by Shell Development Company under the designation of DURAFLEX.
  • Preferred polyethylene resins for use as the at least one substantially crystalline or crystalline polymer m the present invention are high density polyethylene resins having a density of at least 0.94 g/cc and are ethylene homopolymers or interpolymers of ethylene and at least one C 3 -C 20 ⁇ -olefm.
  • Average film thickness for the film structures or liners made in accordance with the present invention range from 1.5 to 2.6 mils (0.04 to 0.07 mm) .
  • liner thicknesses will generally be thicker than those of the low- or no-sugar cereals.
  • compositions can be made via any known technique, including, but not limited, dry blending and extrusion melt mixing of component polymers and in situ polymerizations and interpolymerizations that involve multiple reactors and/or multiple catalyst systems.
  • samples were fabricated into two mil ( 50 micron ) monolayer blown films on a unit equipped with a 24:1 L/D, 2-1/2 inch (63.5 mm ) extruder and a 6 inch (152.4 mm) die.
  • the blow-up-ratio (BUR) was 2.5:1 for all samples.
  • the polyolefin plastomer was run utilizing a 70 mil (1780 micron) die gap and a melt temperature of approximately 400°F (205°C) .
  • the EVA copolymer and the ionomer were processed as recommended by the manufacturer at a 40 mil (1,020 micron ) die gap for both and at melt temperatures of 400°F (204°C) and 440 °F ( 227°C ) , respectively.
  • Two mil ( 50 micron ) coextrusions of HDPE/sealant (75/ 25 layer ratio ) were fabricated on a three layer blown coextrusion line equipped with two 24:1 L/D, 2-1/2 inch ( 63.5 mm) and one 24:1 L/D, 2 inch (50.8 mm) extruders and an 8 inch (203.2 MM) 3-layer coextrusion die.
  • the die was equipped with a 70 mil (1,780 micron) die pin insert.
  • the BUR was 2.25:1.
  • the probe is aligned to traverse upwards through the center of the mounted film at a deformation rate of 250 rnm/min.
  • the force required to rupture the film is taken from the digital display and divided by the film thickness and the diameter of the probe to provide puncture resistance in kg-m/cc.
  • Polyolefin plastomers exhibited excellent abuse resistance ( dart impact, puncture resistance, tear resistance) and optics compared to the Eva and ionomer sealant polymers (Table III) .
  • Heat seal strengths were reported in pounds/inch (lb. /in) (g/mm) .
  • heat seal initiation temperature was defined as the temperature at which 1 lb/in (18 g/mm) heat seal strength was obtained.
  • Hot tack measurements were also performed on a Topwave Hot Tack Tester: seal time of 0.5 second, delay time of 0.2 second, peel speed of 150 mm/ second, and seal pressure of 40 psi (0.275 Mpa) . Hot tack is recorded in Newtons (N) /25mm width.
  • Sensory data was generated using trained panelists to evaluate film samples in a ranking format or paired comparison, as specified.
  • the samples were coded with random three digit numbers and presented according to a balanced block design in order to minimize bias. Evaluations were conducted in an air medium. Panelists smelled the backs of their hands between odor samples m order to zero out their sense of smell. Data was analyzed using a Friedman Analysis of Variance followed by Duncan Multiple Range comparisons.
  • the polyolefin plastomer was blended with a PB copolymer and a PP homopolymer to form the sealant layer in coextruded blown film.
  • the sealant layers contained a constant level of 2500 ppm slip and 5000 ppm antiblock, added via concentrates in a polyolefin plastomer base resin.
  • the evaluation was set up as a 3 level, 2 variable full factorial with repeated center points .
  • Independent variables were PB and PP blend ratios.
  • Dependent variables we graspre seal initiation temperature, sealing temperature range, ultimate seal strength, and hot tack strength.
  • the range of weight percent polybutylene was set from about 5 to about 35 weight percent and polypropylene was varied from about 5 to about 15 weight percent base on the total weight of the sealant composition. Thirteen formulations were dry-blended to prepare the sealant layer for the two-layer blown coextruded film samples (Table II) .
  • the puncture resistance of the polyolefin plastomer was approximately 20% higher than the EVA copolymer and double that of the ionomer.
  • Moisture barrier of the polyolefin plastomer was significantly better than the EVA copolymer (2.0 versus 6.2 g-mil/ 100 sq. m-day-atm. ) (79 versus 244 g-cm/sq. m-day-atm. ) .
  • Heat seal strengths were measured on HDPE/sealant coextrusions where the sealant layer was the plastomer, EVA copolymer or the ionomer ( Figure 1) .
  • the polyolefin plastomer exhibited excellent heat seal strength over a wide temperature range.
  • the heat seal initiation temperature of the plastomer was 3°C below that of the EVA copolymer and 15°C lower than the ionomer.
  • Hot tack strengths were also measured on HDPE/ sealant coextrusions ( Figure 2) .
  • the ultimate hot tack strength of the polyolefin plastomer was much higher (70 to 120 percent higher) than either that of the EVA copolymer or the ionomer.
  • a 35 member test panel ranked samples from least to most intense (with a value of 3 as most intense) to compare the odor characteristics of the plastomer to the ionomer ( Figure 3) .
  • the plastomer received the most neutral response (lesser value) when compared to the ionomer, at confidence levels greater than 90 percent.
  • 24 of 24 panelists identified the plastomer as exhibiting lower off-odor compared to the EVA copolymer.
  • the EVA copolymer was typically described as having an "acidic, sharp, or sour" odor.
  • Heat seal values and initiation temperatures obtained from the experimental design were reviewed and entered into Statgraphics for analysis. As defined in the introduction, a value between 1 and 3 pounds (0.45 and 1.36 kg) is a common target heat seal strength for a peelable seal. The standard deviation for heat seal testing was 0.5 lb/in (89 g/cm) . The surface response plot for the results is shown in Figure 4.
  • PB denotes polybutylene resin
  • PP denotes polypropylene resin

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

Abstract

La présente invention concerne des compositions d'étanchéité détachables et des structures de couches de scellage détachables. Ces nouvelles compositions comprennent au moins un plastomère éthylène à ramification homogène, une petite quantité d'au moins un polymère amorphe ou élastomère et une quantité encore plus petite d'au moins un polymère sensiblement cristallin ou cristallin. Ces compositions et cette structure de couche sont utiles dans les applications nécessitant de large fenêtres de matériau thermosoudable telles que les emballages et les revêtements intérieurs des emballages de céréales.
PCT/US1997/010625 1996-06-21 1997-06-20 Compositions d'etancheite et couches de scellage detachables WO1997048554A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU34030/97A AU3403097A (en) 1996-06-21 1997-06-20 Peelable-seal compositions and sealant film layers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2018996P 1996-06-21 1996-06-21
US60/020,189 1996-06-21

Publications (1)

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WO1997048554A1 true WO1997048554A1 (fr) 1997-12-24

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ID (1) ID17690A (fr)
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052972A1 (fr) * 1998-04-15 1999-10-21 The Dow Chemical Company Composition pour scellage pelable en polyolefine et couche de scellement
WO2000002960A1 (fr) * 1998-07-07 2000-01-20 Basell Technology Company B.V. Compositions de polyethylene possedant des proprietes mecaniques ameliorees et une capacite de traitement amelioree a l'etat de fusion
US6476137B1 (en) * 1998-04-16 2002-11-05 Cryovac, Inc. Ternary polymer blend, the film containing it, and the easy-to-open package made therewith
US6630237B2 (en) 2001-02-05 2003-10-07 Cryovac, Inc. Peelably sealed packaging
US7871696B2 (en) 2006-11-21 2011-01-18 Kraft Foods Global Brands Llc Peelable composite thermoplastic sealants in packaging films
US7871697B2 (en) 2006-11-21 2011-01-18 Kraft Foods Global Brands Llc Peelable composite thermoplastic sealants in packaging films
US8173748B1 (en) 2010-12-17 2012-05-08 Exxonmobil Research And Engineering Company Heat-seal resin and package formed therefrom
WO2012113535A1 (fr) * 2011-02-23 2012-08-30 Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co Kg Enveloppe pouvant être ouverte avec peu de bruit
US9096780B2 (en) 2010-02-26 2015-08-04 Intercontinental Great Brands Llc Reclosable fasteners, packages having reclosable fasteners, and methods for creating reclosable fasteners
US9382461B2 (en) 2010-02-26 2016-07-05 Intercontinental Great Brands Llc Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages
US9532584B2 (en) 2007-06-29 2017-01-03 Kraft Foods Group Brands Llc Processed cheese without emulsifying salts
US9533472B2 (en) 2011-01-03 2017-01-03 Intercontinental Great Brands Llc Peelable sealant containing thermoplastic composite blends for packaging applications
CN114603959A (zh) * 2022-03-28 2022-06-10 河南鸿鹄新材料有限公司 一种低温热封cpp薄膜
CN115139609A (zh) * 2022-06-09 2022-10-04 成都博实科睿新材料有限公司 用于聚丙烯杯、碗、盒热封且界面易揭的聚乙烯薄膜

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EP0178061A2 (fr) * 1984-08-31 1986-04-16 Shell Oil Company Pellicule de film d'emballage
EP0321220A2 (fr) * 1987-12-15 1989-06-21 Mitsui Petrochemical Industries, Ltd. Matériau soudable à chaud, facile à ouvrir
US5023121A (en) * 1990-04-12 1991-06-11 W. R. Grace & Co.-Conn. Coextruded film with peelable sealant
WO1993017863A1 (fr) * 1992-03-09 1993-09-16 Mobil Oil Corporation Films thermoplastiques thermosoudables
EP0597502A2 (fr) * 1992-11-13 1994-05-18 W.R. Grace & Co.-Conn. Films rétractables à la chaleur contenant des copolymères catalisés par cataliseurs de site singulier
EP0681914A1 (fr) * 1994-05-10 1995-11-15 Viskase Corporation Film thermorétractable et étirable multicouche
WO1996016119A1 (fr) * 1994-11-14 1996-05-30 The Dow Chemical Company Compositions d'extrusion a etirage eleve et a faible striction
EP0721967A1 (fr) * 1995-01-13 1996-07-17 Norton Performance Plastics Corporation Soudage thermoplastique et feuille d'emballage
EP0730003A1 (fr) * 1995-02-03 1996-09-04 Tosoh Corporation Composition de résine de polypropylène et objets formés à partir de cette composition

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178061A2 (fr) * 1984-08-31 1986-04-16 Shell Oil Company Pellicule de film d'emballage
EP0321220A2 (fr) * 1987-12-15 1989-06-21 Mitsui Petrochemical Industries, Ltd. Matériau soudable à chaud, facile à ouvrir
US5023121A (en) * 1990-04-12 1991-06-11 W. R. Grace & Co.-Conn. Coextruded film with peelable sealant
WO1993017863A1 (fr) * 1992-03-09 1993-09-16 Mobil Oil Corporation Films thermoplastiques thermosoudables
EP0597502A2 (fr) * 1992-11-13 1994-05-18 W.R. Grace & Co.-Conn. Films rétractables à la chaleur contenant des copolymères catalisés par cataliseurs de site singulier
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WO1996016119A1 (fr) * 1994-11-14 1996-05-30 The Dow Chemical Company Compositions d'extrusion a etirage eleve et a faible striction
EP0721967A1 (fr) * 1995-01-13 1996-07-17 Norton Performance Plastics Corporation Soudage thermoplastique et feuille d'emballage
EP0730003A1 (fr) * 1995-02-03 1996-09-04 Tosoh Corporation Composition de résine de polypropylène et objets formés à partir de cette composition

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WO1999052972A1 (fr) * 1998-04-15 1999-10-21 The Dow Chemical Company Composition pour scellage pelable en polyolefine et couche de scellement
US6476137B1 (en) * 1998-04-16 2002-11-05 Cryovac, Inc. Ternary polymer blend, the film containing it, and the easy-to-open package made therewith
WO2000002960A1 (fr) * 1998-07-07 2000-01-20 Basell Technology Company B.V. Compositions de polyethylene possedant des proprietes mecaniques ameliorees et une capacite de traitement amelioree a l'etat de fusion
US6437047B1 (en) 1998-07-07 2002-08-20 Basell Polyolefine Gmbh Polyethylene compositions having improved mechanical properties and improved processability in the melted state
US6630237B2 (en) 2001-02-05 2003-10-07 Cryovac, Inc. Peelably sealed packaging
US8470397B2 (en) 2006-11-21 2013-06-25 Kraft Foods Global Brands Llc Peelable composite thermoplastic sealants in packaging films
US7871697B2 (en) 2006-11-21 2011-01-18 Kraft Foods Global Brands Llc Peelable composite thermoplastic sealants in packaging films
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US7871696B2 (en) 2006-11-21 2011-01-18 Kraft Foods Global Brands Llc Peelable composite thermoplastic sealants in packaging films
US9309027B2 (en) 2006-11-21 2016-04-12 Intercontinental Great Brands Llc Peelable composite thermoplastic sealants in packaging films
US9532584B2 (en) 2007-06-29 2017-01-03 Kraft Foods Group Brands Llc Processed cheese without emulsifying salts
US10287077B2 (en) 2010-02-26 2019-05-14 Intercontinental Great Brands Llc Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages
US9096780B2 (en) 2010-02-26 2015-08-04 Intercontinental Great Brands Llc Reclosable fasteners, packages having reclosable fasteners, and methods for creating reclosable fasteners
US9382461B2 (en) 2010-02-26 2016-07-05 Intercontinental Great Brands Llc Low-tack, UV-cured pressure sensitive adhesive suitable for reclosable packages
US8173748B1 (en) 2010-12-17 2012-05-08 Exxonmobil Research And Engineering Company Heat-seal resin and package formed therefrom
US9533472B2 (en) 2011-01-03 2017-01-03 Intercontinental Great Brands Llc Peelable sealant containing thermoplastic composite blends for packaging applications
US9872802B2 (en) 2011-02-23 2018-01-23 Infiana Germany Gmbh & Co. Kg Quiet-opening wrapper
WO2012113535A1 (fr) * 2011-02-23 2012-08-30 Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co Kg Enveloppe pouvant être ouverte avec peu de bruit
CN114603959A (zh) * 2022-03-28 2022-06-10 河南鸿鹄新材料有限公司 一种低温热封cpp薄膜
CN115139609A (zh) * 2022-06-09 2022-10-04 成都博实科睿新材料有限公司 用于聚丙烯杯、碗、盒热封且界面易揭的聚乙烯薄膜
CN115139609B (zh) * 2022-06-09 2024-03-22 成都博实科睿新材料有限公司 用于聚丙烯杯、碗、盒热封且界面易揭的聚乙烯薄膜

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ID17690A (id) 1998-01-22
AU3403097A (en) 1998-01-07

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