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WO2006117801B1 - Packaging materials - Google Patents

Packaging materials

Info

Publication number
WO2006117801B1
WO2006117801B1 PCT/IN2006/000072 IN2006000072W WO2006117801B1 WO 2006117801 B1 WO2006117801 B1 WO 2006117801B1 IN 2006000072 W IN2006000072 W IN 2006000072W WO 2006117801 B1 WO2006117801 B1 WO 2006117801B1
Authority
WO
WIPO (PCT)
Prior art keywords
film
soluble
biodegradable
substrate
water
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
Application number
PCT/IN2006/000072
Other languages
French (fr)
Other versions
WO2006117801A2 (en
WO2006117801A3 (en
Inventor
Shilpan Pravinchandra Patel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU2006242781A priority Critical patent/AU2006242781A1/en
Publication of WO2006117801A2 publication Critical patent/WO2006117801A2/en
Publication of WO2006117801A3 publication Critical patent/WO2006117801A3/en
Publication of WO2006117801B1 publication Critical patent/WO2006117801B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal 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
    • B32B15/085—Layered products comprising a layer of metal comprising metal 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 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/042—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/044—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/06—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/10—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose next to a fibrous or filamentary layer
    • 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
    • B32B27/10—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 paper or cardboard
    • 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
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • 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
    • B32B2274/00—Thermoplastic elastomer material
    • 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
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • 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
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • 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
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7166—Water-soluble, water-dispersible
    • 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
    • B32B2307/70—Other properties
    • B32B2307/728—Hydrophilic
    • 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
    • B32B2439/02—Open containers
    • B32B2439/06—Bags, sacks, sachets
    • 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
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags
    • 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
    • B32B2439/40—Closed containers
    • B32B2439/62—Boxes, cartons, cases
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Laminated Bodies (AREA)

Abstract

A biodegradable packaging material and methods of manufacturing the same are provided in which a biodegradable substrate and a biodegradable polymer film are laminated together without the use of an adhesive interlayer. The film may be made of material that is soluble in water or which swells when exposed to moisture and is biodegradable. Off-line methods employing preformed substrates and films are disclosed as well as on-line methods in which the film is formed on a liner prior to the laminating process or is extruded onto the substrate.

Claims

AMENDED CLAIMS received by the International Bureau on 19 April 2007 (19.04.07)
1. A degradable multi-layered composite packaging material comprising of a substrate layer and a biodegradable film adhered at least on one side of the said substrate without using any adhesive; wherein, a. the said substrate is a degradable material that is a metal foil or a sheet made out of a biodegradable material selected from the group comprising biodegradable fibres, fabric, pulps like cotton, jute, hemp, baggasse, wood pulp and the like; and b. the said biodegradable film is a water soluble / non-soluble totally or partially hydrophilic film,
2. The packaging material according to claim 1, wherein the said' metal foil comprises an aluminium foil, brass foil, copper foil, tin foil, steel foil, zinc foiland the like.
3. The packaging material according to claim 1, wherein the water soluble/non soluble totally or partially hydrophilic film is made of one or more of a raw material including Polyvinyl alcohol copolymer ionomers, Polyvinyl alcohol homopolymer, non - ionomeric poly vinyl alcohol polymer, Polymethacrylate, polyvinyl alchohol, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyurethane, polycthyleneglycol, polyvinylpyrrolidone, proteinaceous birders such as gelatin, modified gelatins such as phthaloyl gelatin, polysaccharides sucjh as starch, gum Arabic, pullulan and dextrin and water-soluble cellulose derivatives such as methyl cellulose, hydroxy propyl cellulose, hydroxy propyl methyl cellulose, hydroxy propyl ethyl cellulose, hydroxy ethyl cellulose, carboxy methyl cellulose either alone or combinations thereof and the like.
4. The packaging material according to claim 3, wherein the said water soluble/non soluble totally or partially hydrophilic film is cold water soluble, warm water soluble, hot water soluble or non soluble in water but swellable under moisture end biodegradable; where cold water soluble film dissolves in water between temperature range of around I°C to
35°C, warm water soluble film dissolves in water between temperature range of around 35°C to 50°C and hot water soluble film dissolves in water having temperature above 50°C,
5. The packaging material according to claim 1 or claim 3 or claim 4, wherein the biodegradable film is a partially hydrophilic film, non soluble in water, which may be cast with water soluble film materials at least on one side of the film.
6, The packaging material according Io claim 5, wherein the said non soluble partially hydrophilic film is made of thermoplastic starch materials.
7. The packaging material according to claim 6, wherein the water-isoluble film material for casting on the non soluble partially hydrophilic film comprises one or more of a raw material includingPoiyvinyl alcohol copolymer ionomers, Polyvinyl alcohol homopolymer, non - ionomeric poly vinyl alcohol polymer, Polymethacry late, polyvinyl alchohol, polyacrylamide, polymethacrylamidc, poJyacrylic acid, polymethacrylic acid, polyurethane, polyethyleneglycol, polyvinylpyrrolidone, proteinaceous binders such as gelatin, modified gelatins such as phthaloyl gelatin, polysaccharides such as starch, gum arabic, pulluian and dextrin and water-soluble cellulose derivatives such as methyl cellulose, hydroxy propyl cellulose, hydroxy propyl methyl cellulose, hydroxy propyl ethyl cjellulose, hydroxy ethyl cellulose, carboxy methyl cellulose either alone or combinations thereof and the like.
8. The packaging material according to claim I, wherein the said substrate and water soluble/non soluble hydrophilic film are combined by layering, coating, impregnating or laminating.
9. A method of manufacturing a multi-layered composite packaging material, comprising at least one of the material that is a biodegradable film and one or τnore of the other being a film of a material that is biodegradable or degradable by co,τosion, the said method comprising of the following steps: a. casting a water soluble/non soluble hydrophilic film on a liner at a primary casting head of a casting machine; b. semi-drying the said cast film and feeding the said semi-dried film to nip rolls; c, unwinding a web of a material that is biodegradable or degradable by corrosion as a substrate to the said nip rolls for combining with the said semi-dried cast film; d. passing the said substrate combined with cast film through nip rolls and storing the combined substrate and cast film for an internal ageing period.
10. The method according to claim 9, wherein the said cast film is semi-dried with or without applying heat in a blower section having temperature ranging from 10°C to 140°C, preferably from 30°C to 100°C and more preferably from 40°C tor.90°C
11 A method of manufacturing multi-layered composite packaging material comprising at least one hydrophilic biodegradable substrate and one or more of a biodegradable totally or partially hydrophilic film, the said method comprising following steps: a. providing a hydrophilic biodegradable substrate and a preformed water soluble/non soluble hydrophilic film with a liner; b. wetting the substrate by passing it through a wetting tray containing water with or without a wetting agent; c. removing excess water, the said water being with or without wetting agent, from the substrate; d. affixing the water soluble/non soluble hydrophilic film with the said wet substrate by passing through nip rolls; e. storing the laminate of biodegradable substrate with preformed water soluble/non soluble hydrophilic film for an internal ageing period.
12. A method according to claim 11, wherein the said wetting agent comprises one or more of a surfactant including anionic based surfactants (based on sulfonate anions or carboxylate anions), fatty acid salts, sodium dodecyl sulfate (SDS) or- sodium lauryl sulfate, ammonium lauryl sulfate and other alkyl sulfate salts; cationic based surfactants such as cetyl pyridinium chloride; ampholytic surfactants like dedecyl betaine, dodecyl dimethylamine oxide; nonionic surfactants like alkyl polyethylene oxide, alkyl polyglucosides and fatty alcohols either alone or combinations thereof and the like.
13. A method according to claim 12, wherein the amount of wetting agent in water ranges from 0.5% to 10% by wt, preferably from 1% to 5% by wt, mere preferably from 2% to 3% by Wt.
14. A method according to claim 12, wherein the excess water is removed by passing the substrate through squeeze rollers kept under pressure to control the moisture in the substrate, the pressure between the squeeze rollers ranging from-1Psi to 25 psi, preferably 3 psi to 20 psi, more preferably between 4 psi to 9 psi.
15. The method according to claim 12, wherein the laminate of wet'substrate and preformed water soluble/non soluble hydrophilic film is dried before storing for internal ageing by passing through a dryer section, the temperature in the dryer secτion ranging from 10°C to 100°C, preferably from 30°C to 70°C, more preferably from 30°C to 50°C-
16. A method of manufacturing of multi-layered composite packaging material comprising at least one biodegradable hydrophilic film and one or more of the other being biodegradable πon porous substrate , the said method comprising; of the following steps: a. casting a water soluble/non soluble hydrophilic film on a non porous biodegradable substrate; b. drying the laminate of step (i) by passing it through a set of dryers, the temperature in the dryers ranging from 60°C to 200°C, preferably from 80°C to 175°C, more preferably from 100°C to 150°C.
17. A method according to claim 9 or 16, wherein the water soluble/non soluble hydrophilic film is cast from a batch solution in a batch reactor having a temperature ranging from 10°C to 95°C, preferably from 20°C to 85°C, more preferably from 25°C to 70°C.
18. A method of manufacturing of multi-layered composite packaging comprising at least one material that is biodegradable and one or more of the other being biodegradable or degradable by corrosion, the said method comprising following -steps; a. extruding a desired thickness of water soluble/non soluble hydrophilic film onto a biodegradable substrate; b. passing the extruded water soluble/non soluble hydrophilic film with biodegradable substrate through a chiller,
19. A method according to claim 9 or 1 1 , wherein the said internal ageing period is ranging from 1 hour to 720 hours, preferably 10 hours to 360 hours, more preferably from 24 hours to 100 hours.
20. The method according to claim 9, or 1 1 or 16 wherein the said liner is of paper, film, foil or fabric.
21. The method according' to claim 9, or 1 1, or 16 or 18, wherein the said biodegradable substrate is made from materials selected from the group comprising bio-degradable fibres, fabric, pulps like cotton, jute, hemp, baggasse, wood pulp.-
22. The method according to claim 9, or 16 or or 18, wherein the said biodegradable substrate is made from naturally corrosive metallic foils selected frora the group comprising aluminium foil, brass foil, copper foil, tin foil, steel foil and zinc foil.
23. The method according to claim 9, or 16 or 18, wherein the said substrate is selected from non porous substrates including non porous paper and naturally corrosive and subsequently bio-degradable metallic foils selected from the group of aluminium foil, brass foil, copper foil, tin foil, steel foil and zinc foil.
24. The method according to claim 9, or 11 , or 16 or 18, wherein ihe said water soluble/non soluble hydrophjlic film is made of raw materials selected from Polyvinyl alcohol copolymer ionomcrs, Polyvinyl alcohol homopolymer, non - ionomeric poly vinyl alcohol polymer, Polymethacrylate, polyvinyl alchohol, polyacrylamide, pαlymethacrylamide, polyacrylic acid, polymethacrylic acid, polyurethane, polyethyleneglycol, polyvinylpyrrolidone, proteinaceous binders such as gelatin, modified gelatins such as phthaloyl gelatin, polysaccharides such as starch, gum Arabic, pullulan and dextrin and water-soluble cellulose derivatives such as methyl cellulose, hydroxy propyl cellulose, hydroxy propyl methyl cellulose, hydroxy propyl ethyl cellulose, hydroxy ethyl cellulose, carboxy methyl cellulose either alone or combinations thereof.
25. The method according to claim 9, or H, or 16 or 18, wherein the biodegradable film is a non soluble partially hydrophilϊc film which may be cast with water soluble materials at least on one side of the film.
26. The method according to claim 25, wherein the said non soluble partially hydrophilic film is made of thermoplastic starch materials.
27. The method according to claim 25, wherein the water soluble materials for casting on the non soluble partially hydrophilic film is made of one or more of a raw material including Polyvinyl alcohol copolymer ionomers. Polyvinyl alcohol homopolymer, non - ionorneric poly vinyl alcohol polymer, Polymethacryiate, polyvinyl alchohol, polyacrylamide, polymethacrylamide, polyacrylic acid, polymethacrylic acid, polyurethane, polyethyleneglycol, polyvinylpyrrolidone, proteinaceous binders such as gelatin, modified, gelatins such as phthaloyl gelatin, polysaccharides such as starch, gum arabic, pullulan and dextrin and water-soluble cellulose derivatives such as methyl cellulose, hydroxy propyl cellulose, hydroxy propyl methyl cellulose, hydroxy propyl ethyl cellulose, hydroxy ethyl cellulose, carboxy methyl cellulose either alone or combinations thereof and the like.
28. The method according to claim 9, or 11, or 16 or 18, further including the step of slitting/cutting the laminate prior to or after the internal ageing period
PCT/IN2006/000072 2005-03-03 2006-03-02 Packaging materials Ceased WO2006117801A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2006242781A AU2006242781A1 (en) 2005-03-03 2006-03-02 Packaging materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN244MU2005 2005-03-03
IN244/MUM/2005 2005-03-03

Publications (3)

Publication Number Publication Date
WO2006117801A2 WO2006117801A2 (en) 2006-11-09
WO2006117801A3 WO2006117801A3 (en) 2007-05-03
WO2006117801B1 true WO2006117801B1 (en) 2007-06-14

Family

ID=37308393

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2006/000072 Ceased WO2006117801A2 (en) 2005-03-03 2006-03-02 Packaging materials

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