WO1990007427A1 - Materiau d'emballage recollable - Google Patents

Materiau d'emballage recollable Download PDF

Info

Publication number
WO1990007427A1
WO1990007427A1 PCT/US1990/000101 US9000101W WO9007427A1 WO 1990007427 A1 WO1990007427 A1 WO 1990007427A1 US 9000101 W US9000101 W US 9000101W WO 9007427 A1 WO9007427 A1 WO 9007427A1
Authority
WO
WIPO (PCT)
Prior art keywords
packaging material
layer
adhesive
skin layer
seal
Prior art date
Application number
PCT/US1990/000101
Other languages
English (en)
Inventor
Steven J. Straus
Edward J. Zuscik
William B. Bower
Apostol Yanidis
Original Assignee
James River Ii, Inc.
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 James River Ii, Inc. filed Critical James River Ii, Inc.
Priority to CA002045136A priority Critical patent/CA2045136C/fr
Priority to BR909006997A priority patent/BR9006997A/pt
Priority to KR1019900701992A priority patent/KR910700144A/ko
Publication of WO1990007427A1 publication Critical patent/WO1990007427A1/fr

Links

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
    • 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
    • B32B7/06—Interconnection of layers permitting easy separation
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/20—Starch
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • Flexible packaging materials comprising layers of thermoplastic polymers are used to package a variety of products, particularly food. For example, cereals, potato chips and other snack foods are packaged in such materials.
  • the packages are formed in packaging machines in which the material is sealed to itself by heated sealing jaws. However, when a package is opened by pulling apart one of the heat seals, normally at the top of the package, the heat seal is not reasealable without the application of heat as well as pressure.
  • This invention provides a flexible packaging material that is resealable by the application of pressure alone at the area of a seal formed by a packaging machine.
  • the material of this invention comprises a substrate layer, a layer of tacky adhesive adjacent the substrate layer, and a skin layer covering the layer of tacky adhesive.
  • the substrate layer may comprise any material that is conventionally used for flexible packaging applications, such as plastic film, metal foil, paper or a combination thereof.
  • Plastic film substrates may be single layer or multilayer and may be oriented or unoriented.
  • the film can be polya ide, polyester, or olefin polymer or copolymer.
  • Suitable substrates include poly(ethylene terephthalate) film, paper, oriented polypropylene film, and nonwoven materials.
  • tacky adhesive refers to an adhesive that, in the practice of this invention, forms a resealable bond by the application of manual pressure alone at room temperature.
  • the reseal strength is preferably between about 0.5 and 4 pounds per inch (0.1 and 0.7 kg/cm), more preferably between about one and two pounds per inch (0.18 and 0.36 kg/cm).
  • Such adhesives may include cold seals and tacky lacquers. Cold seals are formed from aqueous latex emulsions of an elastomer.
  • the tacky adhesive is preferably a pressure sensitive adhesive, which is a blend of an elastomer and a tackifier.
  • the pressure sensitive adhesive preferably comprises from about 40 to 80 percent of a thermoplastic elastomer, 20 to 60 percent of a tackifier, and up to about 15 percent of other components, such as a fragrance and conventional additives, such as an antioxidant and an oil.
  • the fragrance is not appreciably noticeable until the material is formed into a package and the package is opened because the fragrance is essentially encapsulated in the packaging material.
  • the fragrance is liberated, thereby enhancing the appeal of the product in the package. Best results are obtained using an oil-based fragrance that is absorbed by the elastomer component of the adhesive.
  • elastomers include styrene copolymers, such as styrene-butadiene copolymers sold under the trademark Stereon by Firestone and styrene-isoprene copolymers sold under the trademark Kraton by Shell Chemical Company.
  • styrene copolymers such as styrene-butadiene copolymers sold under the trademark Stereon by Firestone and styrene-isoprene copolymers sold under the trademark Kraton by Shell Chemical Company.
  • Other suitable elastomers include polyurethane and ethylene-vinyl acetate copolymers having a vinyl acetate content of about 18 percent or higher.
  • the tackifier may be any tackifier conventionally used with, elastomers to form pressure sensitive adhesives.
  • Suitable tackifiers include terpene resins, such as resins sold under the trademark Zonatac by Arizona Chemical Company, and petroleum hydrocarbon resins, such as resins sold under the trademark Escorez by Exxon Chemical Company.
  • the pressure sensitive adhesive is preferably coextrudable.
  • the coextrudability of the pressure sensitive adhesive may be enhanced by utilizing a thermoplastic elastomer having a low melt index and by increasing the proportion of the elastomer in the adhesive.
  • the melt index of the adhesive is preferably less than 30, more preferably less than 10, for coextrusion with conventional polyolefin ⁇ .
  • the pressure sensitive adhesive, or other tacky adhesive may be applied to the substrate by methods other than extrusion, such as adhesive lamination, rotogravure, flexographic or silk screen printing, Meyer rod, spray coating, charged particle coating, or vacuum deposition.
  • the adhesive may be applied as 100 percent solids or by using water or a solvent as a vehicle.
  • the adhesive may be coated onto the substrate in register only where it is required.
  • the skin layer may be similarly applied in register over the adhesive alone, such as by printing the adhesive layer and the skin layer onto the substrate sequentially using a central impression press.
  • the skin layer may be applied to other surface areas as well, including the entire surface of the packaging material.
  • the tacky adhesive may also be applied to the substrate by transferring it from a carrying medium.
  • This technique is commonly used to transfer a thin layer of metal, such as that formed by vapor deposition, from one substate to another in the manufacture of metallized packaging materials.
  • the skin layer may also be transferred with the adhesive by this technique.
  • the carrying medium is preferably paper coated with a silicone release agent.
  • the paper substrate may be recycled and may be an endless belt in a continuous process. If the paper bearing the adhesive layer is rolled up, it is preferably coated with the release agent on both sides to prevent blocking.
  • the thickness of the layer of tacky adhesive is preferably between about 0.1 and 2.0 mil (2.5 and 51 microns), more preferably between about 0.3 and 0.7 mil (7.6 and 18 microns).
  • the skin layer performs two critical functions. First, it produces a coefficient of friction on the surface of the packaging material such that the material is machinable in a conventional packaging machine. Second, the skin layer becomes broken so that when the seal is pulled apart, the tacky adhesive is exposed at the surface of the seal. There are two mechanisms by which this occurs. In one mechanism (First Mechanism) , the skin layer is disrupted by the shearing action of the sealing jaws in the packaging machine such that the tacky adhesive becomes present at the interface where the material is sealed to itself. The skin layer is preferably disrupted over most of the area of the seal. By this mechanism, it is possible to produce the initial seal from the tacky adhesive alone, thereby obviating the need to apply heat to the sealing jaws.
  • First Mechanism the skin layer is disrupted by the shearing action of the sealing jaws in the packaging machine such that the tacky adhesive becomes present at the interface where the material is sealed to itself.
  • the skin layer is preferably disrupted over most of the area of the seal.
  • the skin layer is heat sealed to itself, preferably using flat sealing jaws, and remains substantially intact until it ruptures through to the adhesive layer when force is initially applied to pull the heat seal apart.
  • the skin layer then delaminates from the substrate layer when additional force is applied until the end of the seal is reached.
  • the delamination may occur between the skin layer and the adhesive layer, between the adhesive layer and the substrate layer, or r preferably, in a plane lying in the adhesive layer so the adhesive is present on both surfaces of the seal area after the seal has been pulled apart.
  • the latter type of delamination is promoted by heating both sealing jaws when the heat seal is formed.
  • the tacky adhesive is preferably an extrudable pressure sensitve adhesive which is coextruded with the skin layer, either with the substrate layer or onto the substrate layer.
  • the substrate layer is coextruded with the skin layer and the adhesive layer, either blown film coextrusion or cast film coextrusion may be employed.
  • the extrudate may contain multiple layers of the pressure sensitive adhesive.
  • the skin layer may be a layer of a thermoplastic film-forming polymer which is conventionally used as a heat seal layer in packaging materials.
  • the polymer preferably has a tensile strength such that at the desired thickness of the skin layer the heat seal is easy to open, preferably by a force between about 0.4 and 0.9 kg/cm.
  • the polymer also preferably has a low elongation at break, preferably less than 400 percent.
  • the polymer is preferably a copolymer of -5- ethylene and an ethylenically unsaturated comonomer selected from the group consisting of carboxylic acids and esters, salts and anhydrides thereof.
  • Such comonomers include acrylic acid, methacrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, vinyl acetate, and maleic anhydride.
  • Such copolymers are well known commercially available polymers commonly used to form heat seal layers in flexible packaging materials.
  • Other polymers, such as polyolefins, may be blended with the copolymer in a minor amount.
  • the copolymer is preferably an ionomer.
  • the term ionomer refers to a film-forming copolymer of an olefin and an ethylenically unsaturated monocarboxylic acid wherein at least 10% of the carboxylic acid groups are neutralized by a metal ion, preferably zinc.
  • the olefin is preferably ethylene.
  • the carboxylic acid is preferably acrylic acid, methacrylic acid, or methylmethacrylic acid.
  • the proportion of olefin units in the ionomer is at least 50, preferably at least 80, mole percent. Suitable ionomers are described in U.S. Patent No. 3,355,319 and are available commercially under the trademark Surlyn.
  • the skin layer is preferably relatively thin, preferably thinner than the heat seal layer of conventional packaging materials so the laye -fractures when the sealing jaws are applied or when the seal is pulled apart.
  • the thickness of the skin layer is preferably between about 0.05 and 0.5 mil (1.3 and 13 microns), more preferably between about 0.075 and 0.2 mil (1.9 and 5 microns).
  • the skin layer may be any substance that produces the desired coefficient of friction and that is sufficiently disrupted by the sealing jaws that the adhesive becomes present at the seal interface.
  • the substance may even be finely divided solid particulate matter (dust), such as talc or starch particles.
  • the particles may be applied to the adhesive layer in accordance with conventional methods, such as by using Oxydry (trademark) apparatus.
  • the skin layer and the layer of pressure sensitive adhesive may be coextruded together generally in accordance with conventional coextrusion coating methods to form the packaging material of the invention.
  • the components of the pressure sensitive adhesive are preferably maintained under an inert atmosphere, such as nitrogen, to minimize oxidation at the extrusion temperature, which produces degradation and odor.
  • the packaging material may be sealed in accordance with methods typically used for sealing flexible packaging materials in packaging machines.
  • the packaging material is preferably sealed by means of sealing jaws that impart shear to the skin layer, such as described in U.S. Patent 4,582,555.
  • the shear promotes fracture of the skin layer and exposure of the tacky adhesive when the seal is opened.
  • the temperature of the sealing jaws is preferably less than the melting point of the skin layer. In some embodiments, the jaws may be at ambient temperature so the material may effectively be "cold sealed” rather than heat sealed.
  • the skin layer is heat sealed to itself at a conventional temperature of about 230°F (110°C).
  • the seal has a bond strength that is sufficient to ensure the package does not open during normal handling.
  • This bond strength is preferably at least about two pounds per inch (0.4 kg/cm).
  • the seal is also preferably easy to open by being pulled apart manually, so the bond strength is preferably less than about five pounds per inch (0.9 kg/cm) .
  • the material of this invention may be used in conventional packaging machines, such as form, fill and seal machines, in the same manner as conventional flexible packaging materials.
  • a material having a tacky adhesive on its surface could not be used in such machines, of course, because of the high coefficient of friction of the adhesive.
  • the ability of a packaging material to be used in packaging machines is referred to in the art as machinability.
  • the material of this invention has good machinability.
  • each surface of the material has a coefficient of friction against stainless steel which is within the preferred range for machinability, which is from about 0.1 to 0.5.
  • a laminate was formed by coextruding a skin layer and a pressure sensitive adhesive onto a substrate.
  • the substrate was a poly(ethylene terephthalate) film having a thickness of 12.2 microns (Dupont Mylar).
  • the skin layer which was extruded at 218°C, consisted of polystyrene (Dow Styron 625).
  • the pressure sensitive adhesive which was extruded at about 163°C, consisted of 68 percent styrene-isoprene-styrene block copolymer (Shell Kraton D-1107), 30 percent aliphatic petroleum hydrocarbon resin (Exxon Escorez 1310), and 2 percent phenolic antioxidant (Ciba-Geigy Irganox 1010).
  • the hydrocarbon resin was injected into the barrel of the extruder.
  • the thickness of the polystyrene layer was about 0.1 mil (2.5 microns) and the thickness of the layer of pressure sensitive adhesive was about 0.5 mil (12.7 microns).
  • the laminate was heat sealed to itself using the heat seal jaws described in U.S.
  • Patent 4,582,555 by applying a pressure of 80 psi (5.6 kg/cm) for two seconds at a temperature of 110°F. A force of 3.3 pounds per inch width (0.59 kg/cm) was required to open the heat seal. The opened heat seal was then resealed, opened and resealed again twenty times by applying a pressure of 14 psi (0.99 kg/sq.cm) at room temperature for less than 0.1 second. The average reseal strength was 1.03 pounds per inch width (184 grams/cm).
  • a laminate was formed by applying a coating of molten pressure sensitive adhesive onto a substrate, cooling the adhesive, and then applying a coating of polyvinylidene chloride (PVDC) emulsion on top of the adhesive.
  • PVDC polyvinylidene chloride
  • the coatings were applied using a Meyer rod.
  • the substrate was poly(ethylene terephthalate) film having a thickness of one mil (25 microns).
  • the pressure sensitive adhesive was heated to about 150°C and applied at a coating weight of about 14 pounds per ream (23 grams per square meter).
  • the pressure sensitive adhesive which is commercially available from Findley Adhesives, has a viscosity at 150°C of about 42,000 centipoise.
  • the PVDC was applied at a coating weight of about 4 pounds per ream (7 grams per square meter) and dried at about 93°C.
  • the laminate was then sealed to itself using sealing jaws that impart high shear.
  • the jaws were heated to 71°C and applied at a pressure of 80 psi (5.6 kg/sq.cm).
  • a force of 3.2 pounds per inch (0.57 kg/cm) was required to open the seal.
  • the opened seal was then resealed, opened and resealed 20 times by applying a pressure of 14 psi (0.99 kg/sq.cm) at room temperature for less than one second .
  • the average reseal strength was 0.53 pounds per inch (95 grams per cm).
  • the Example illustrates the preparation of packaging material of this invention employing the First Mechanism.
  • the material may be used to package cereals and snack foods in packages that may be easily resealed after each intermittent use.
  • Example 3 A laminate was formed by coextruding a skin layer and a layer of pressure sensitive adhesive onto a film of high density polyethylene having a thickness of two mils (51 microns).
  • the skin layer which was extruded at 230°C, consisted of an ionomer available commercially from Dupont.
  • the pressure sensitive adhesive which was extruded at 196°C, is available commercially from Findley Adhesives.
  • the adhesive has a viscosity of over one million centipoises at 177°C.
  • the basis weight of the adhesive was 5 pounds per ream (8 grams per square meter).
  • the basis weight of the skin layer was 4 pounds per ream (7 grams per square meter).
  • the laminate was then heat sealed to itself using flat sealing jaws applied at a pressure of 40 psi (2.8 kg/cm) for one second, with one jaw being at room temperature and the other jaw at 116°C.
  • a force of 2.4 pounds per inch (0.43 kg/cm) was required to open the heat seal.
  • the opened heat seal was then resealed, opened and resealed again 20 times by applying a pressure of 14 psi (0.99 kg/sq.cm) at room temperature for less than one second.
  • the average reseal strength was 1.03 pounds per inch (184 grams per cm).
  • This Example illustrates the preparation of packaging material of this invention employing the Second Mechanism.
  • the material may be used to package cereals and snack foods in packages that may be easily resealed after each intermittent use.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Sealing Material Composition (AREA)

Abstract

On produit un matériau d'emballage souple usinable susceptible de former une fermeture recollable à la température ambiante en appliquant un adhésif et une fine pellicule sur un substrat tel qu'une pellicule en polyester. Etant donnée la finesse de la pellicule, elle se rompt lorsque l'on ouvre la fermeture, permettant à l'adhésif de former une interface recollable dans la région de la fermeture. Comme l'adhésif est enfermé initialement dans le matériau, celui-ci peut-être utilisé comme d'autres matériaux d'emballage par des machines de façonnage, de remplissage et de fermeture.
PCT/US1990/000101 1989-01-09 1990-01-05 Materiau d'emballage recollable WO1990007427A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002045136A CA2045136C (fr) 1989-01-09 1990-01-05 Materiel de conditionnement a scellement repete
BR909006997A BR9006997A (pt) 1989-01-09 1990-01-05 Material flexivel de empacotamento e processo para sua formacao
KR1019900701992A KR910700144A (ko) 1989-01-09 1990-01-05 재밀봉 가능한 포장재

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29507789A 1989-01-09 1989-01-09
US295,077 1989-01-09

Publications (1)

Publication Number Publication Date
WO1990007427A1 true WO1990007427A1 (fr) 1990-07-12

Family

ID=23136111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/000101 WO1990007427A1 (fr) 1989-01-09 1990-01-05 Materiau d'emballage recollable

Country Status (7)

Country Link
EP (1) EP0453509A4 (fr)
JP (1) JP2938186B2 (fr)
KR (1) KR910700144A (fr)
AU (1) AU630838B2 (fr)
BR (1) BR9006997A (fr)
CA (1) CA2045136C (fr)
WO (1) WO1990007427A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516276A2 (fr) * 1991-05-28 1992-12-02 James River Paper Company, Inc. Matériau d'emballage refermable
WO1994012072A2 (fr) * 1992-11-24 1994-06-09 The Beautiful Bouquet Company Limited Dispositifs d'echantillonnage de liquides volatils et leur procede de fabrication
EP1053865A1 (fr) * 1999-05-21 2000-11-22 Soplaril S.A: Structure multicouche susceptible d'etre obtenue par refermeture de la bulle de coextrusion
EP1053952A1 (fr) 1999-05-21 2000-11-22 Soplaril SA Emballage refermable dont le contenant comprend une couche soudante dechirable, son procédé de fabrication
US9212291B2 (en) 2008-03-31 2015-12-15 Basf Se Use of meltable acrylate polymers for producing contact adhesive layers
EP1775122B2 (fr) † 2005-10-11 2021-10-06 Curwood, Inc. Films refermables à ouverture facile avec interface intérieure déchirable et articles fabriqués à partir de ceux-ci

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008001768A1 (fr) 2006-06-27 2008-01-03 Idemitsu Unitech Co., Ltd. Bande laminée, emballage, et procédé de production de bande laminée
FR2931384B1 (fr) * 2008-05-22 2010-05-28 Bostik Sa Films multicouche pour emballage flexible

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615926A (en) * 1984-07-20 1986-10-07 American Can Company Film and package having strong seals and a modified ply-separation opening
US4673601A (en) * 1984-05-07 1987-06-16 Nyffeler, Corti Ag Cold- or heat-sealable composite film for reclosable packages

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454210A (en) 1968-05-23 1969-07-08 Standard Packaging Corp Easy opening and reclosable package,film therefor and process
USRE27361E (en) * 1970-03-06 1972-05-09 Reclosable package

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4673601A (en) * 1984-05-07 1987-06-16 Nyffeler, Corti Ag Cold- or heat-sealable composite film for reclosable packages
US4615926A (en) * 1984-07-20 1986-10-07 American Can Company Film and package having strong seals and a modified ply-separation opening

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0453509A4 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516276A2 (fr) * 1991-05-28 1992-12-02 James River Paper Company, Inc. Matériau d'emballage refermable
EP0516276A3 (en) * 1991-05-28 1993-02-03 James River Ii, Inc. Resealable packaging material
WO1994012072A2 (fr) * 1992-11-24 1994-06-09 The Beautiful Bouquet Company Limited Dispositifs d'echantillonnage de liquides volatils et leur procede de fabrication
WO1994012072A3 (fr) * 1992-11-24 1994-08-04 Beautiful Bouquet Co Ltd Dispositifs d'echantillonnage de liquides volatils et leur procede de fabrication
GB2276820A (en) * 1992-11-24 1994-10-12 Beautiful Bouquet Co Ltd Volatile liquid samplers and process for their manufacture
GB2276820B (en) * 1992-11-24 1995-03-22 Beautiful Bouquet Co Ltd Volatile liquid samplers and process for their manufacture
EP1053865A1 (fr) * 1999-05-21 2000-11-22 Soplaril S.A: Structure multicouche susceptible d'etre obtenue par refermeture de la bulle de coextrusion
EP1053952A1 (fr) 1999-05-21 2000-11-22 Soplaril SA Emballage refermable dont le contenant comprend une couche soudante dechirable, son procédé de fabrication
FR2793724A1 (fr) * 1999-05-21 2000-11-24 Soplaril Sa Structure multicouche susceptible d'etre obtenue par refermeture de la bulle de coextrusion
AU752289B2 (en) * 1999-05-21 2002-09-12 Soplaril S.A. A multilayer structure able to be obtained by collapsing a co-extrusion bubble
US6511723B1 (en) 1999-05-21 2003-01-28 Soplaril, S.A. Multilayer structure able to be obtained by collapsing a co-extrusion bubble
US6777050B1 (en) 1999-05-21 2004-08-17 Soplaril, S.A. Resealable packaging the container of which includes a tearable welding layer, and its manufacture
EP1775122B2 (fr) † 2005-10-11 2021-10-06 Curwood, Inc. Films refermables à ouverture facile avec interface intérieure déchirable et articles fabriqués à partir de ceux-ci
US9212291B2 (en) 2008-03-31 2015-12-15 Basf Se Use of meltable acrylate polymers for producing contact adhesive layers

Also Published As

Publication number Publication date
BR9006997A (pt) 1991-10-22
JPH04502588A (ja) 1992-05-14
JP2938186B2 (ja) 1999-08-23
EP0453509A4 (en) 1992-03-18
EP0453509A1 (fr) 1991-10-30
CA2045136A1 (fr) 1990-07-10
KR910700144A (ko) 1991-03-14
CA2045136C (fr) 2002-03-19
AU5041390A (en) 1990-08-01
AU630838B2 (en) 1992-11-05

Similar Documents

Publication Publication Date Title
US5089320A (en) Resealable packaging material
KR20000023755A (ko) 금속 처리된 다층 포장 필름
EP1478508A1 (fr) Substrat de carton pour emballage-coque
GB2082502A (en) Process for preparing laminates
WO1996004178A1 (fr) Structure de film pelable
US5126176A (en) Lidding for containers
AU630838B2 (en) Resealable packaging material
GB2360038A (en) Heat sealable polymeric films
JPH10510488A (ja) 熱シール性多層フィルム及びその製造方法
JP3386213B2 (ja) 樹脂組成物及びその積層体
JP4419054B2 (ja) 多層フィルム、容器の蓋材および袋
US20130068769A1 (en) Lidding structure based on polylactic acid film
JP2005187744A (ja) 樹脂組成物及びその積層体
JP3154733B2 (ja) 容器の蓋材
JP2004083094A (ja) 容器の蓋材および再封性包装容器
WO2015046131A1 (fr) Film multicouche anticondensation, laminé l'utilisant et matériau d'emballage
JP4225008B2 (ja) 容器の蓋材用フィルムの製造方法、容器の蓋材および再封性包装容器
JP3667427B2 (ja) 積層体
JP3710909B2 (ja) 積層体
JP2003175567A (ja) 多層フィルム、その製造方法、容器の蓋材および袋
JP2004058568A (ja) 多層フィルム、その製造方法および袋
JPH04283283A (ja) 開封自在テープ
JP3560254B2 (ja) 易開封性包装材料の製造方法
JP2979633B2 (ja) 二軸延伸ポリプロピレンフイルム
JPH0912083A (ja) 電子部品包装体

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BR CA JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1990902864

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2045136

Country of ref document: CA

WWP Wipo information: published in national office

Ref document number: 1990902864

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1990902864

Country of ref document: EP