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WO2000038917A1 - Bi-layer plastic container - Google Patents

Bi-layer plastic container Download PDF

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Publication number
WO2000038917A1
WO2000038917A1 PCT/NO1999/000380 NO9900380W WO0038917A1 WO 2000038917 A1 WO2000038917 A1 WO 2000038917A1 NO 9900380 W NO9900380 W NO 9900380W WO 0038917 A1 WO0038917 A1 WO 0038917A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
container
durable
container according
layers
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/NO1999/000380
Other languages
French (fr)
Inventor
Morten NYTRÖ
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.)
Polimoon AS
Dyno Industrier AS
Original Assignee
Polimoon AS
Dyno Industrier AS
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 Polimoon AS, Dyno Industrier AS filed Critical Polimoon AS
Priority to AU15877/00A priority Critical patent/AU1587700A/en
Publication of WO2000038917A1 publication Critical patent/WO2000038917A1/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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/343—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated in a conventional oven, e.g. a gas or electric resistance oven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • 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
    • B32B2371/00—Polyethers, e.g. PEEK, i.e. polyether-etherketone; PEK, i.e. polyetherketone
    • 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
    • B32B2379/00—Other polymers having nitrogen, with or without oxygen or carbon only, in the main chain
    • B32B2379/08—Polyimides
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups

Definitions

  • the invention relates to a container of twin-layer plastic.
  • Plastic containers for holding different materials, such as food have been on the market for a long time.
  • the problem with known containers is that they do not meet all the demands of being an effective food container, e.g. where food is to be both heated and eaten, from the same container.
  • An effective food container must be durable towards both heat and discolouring. If it is not durable towards discolouring, staining, it will be stained during use, and thereby limit the number of times it is possible to use the container, since service/cooking of food on a stained foundation, will be considered both unhygienic and unappetizing.
  • the container should also be usable in microwaves and ordinary ovens, and be able to be washed in dishwashers. It should therefore be chemical resistant towards dishwashing liquids of different kinds. As it should be used at least 20-30 times, the colour should not fade either.
  • such a container should be simple and economic to produce, and meet applicable standards from, for example FDA and BGA.
  • the main object of the present invention is therefore to provide a container that can be used as an effective food container, especially for food which is to be heated. It is a particular object to provide a container that can withstand high temperatures, so that it may be used in an oven, but that also can be produced at reasonable costs.
  • Fig. 1 shows, in cross section, a container according to the invention
  • Fig. 2 shows an enlarged cross section of the wall of the container shown in Figure 1.
  • Figure 1 shows the cross section of the container, including an inner layer 1 and an outer layer 2 which are in contact with each other along the whole of the container.
  • the container is configured with slightly sloping walls, in such a way that it is easier stack, and thereby occupies thereby minimal space when empty for transportation and storage.
  • the container is twin-layered, an enlarged cross section is shown in Figure 2, where the outer layer 2 is of a heat durable plastic, such as LCP (liquid-crystal-polymer), aromatic polyketones, polyarylates, polyphtalamides or poly(cyclohexylene dimethylene terephtelat).
  • the inner layer 1 i.e. the layer which in use, is in contact with the food, is of a plastic that is durable towards discolouring, staining, for example polyetherimide, polyphenylsulphide, polyethersulphone or polysulphone.
  • Containers with the outer layer 2 of one of the stain durable materials which are mentioned above, and the inner layer of one of the heat durable materials which are mentioned above, can also be made. However, it will not be possible to use these several times, in any case not 20-30 times. This is due to the fact that the heat durable material is not stain durable, and stains that are difficult to remove will therefore occur.
  • the ratio between the layers can be varied, and the characteristics of the container will vary accordingly. With a thin inner layer 1 , the container can be used fewer times, and it will stain easily. If the outer layer 2 is reduced, the container will only withstand low temperatures, and if it is increased, the temperature resistance will increase accordingly.
  • the ratio between the layers can be varied, but each layer 1,2 must at least be 0,3 mm thick, and the total thickness of the container wall must be at least 1 mm.
  • the optimal thickness of each layer is about 1,4 mm, and the total thickness is optimal between 2,5 and 3,0 mm.
  • a container according to the invention can be produced by moulding one of the layers, and then spraying or moulding the other on top.
  • the first layer When the second layer is laid over, a thin layer of the first layer will melt on the interface 3 (contacting surfaces), and the materials will blend somewhat in a thin layer. The individual molecules will therefore get close to each other, and a strong bond between the layers will be obtained. The bond will be a combination of melting together, and chemical binding.
  • the first layer In case the second layer moulds over, the first layer will be moulded in a first mould, and then transferred to a second mould, where at least one part of the mould is a little larger than the first mould. The first layer will be fastened to the part of the mould, having the same size as the first mould, and the other layer will be moulded in the space which is created between the first layer and the mould.
  • the containers which are shown in the figures were performed by moulding the first layer at 400 °C. Then it was cooled to the right demoulding temperature (160°C) before it was moved to a new organ, which moulded the second layer over, at 330°C. After cooling, the container was finished, and could be used.
  • the container can withstand large temperature oscillations, and therefore it is preferable if the expansion coefficient for the two materials which are to be connected, are quite even. However, the chemical/thermal bond at the interface 3, is probably so strong that the container will not split even if it is produced from two materials with different expansion coefficients.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)

Abstract

Container of twin-layer plastic, especially to be used in catering. An inner layer (1) is formed of a stain resistant plastic material, e.g. polyetherimide, polyether sulphone or polyphenyl sulphide, and an outer layer (2) is formed from a heat durable plastic material, e.g. liquid crystal polymer, aromatic polyketone, polyarylate, polyphtalamide or poly(cyclo hexylene dimethylene terephtelate). The layers should be at least 0,3 mm thick, preferably 1,4 mm, and the total thickness of the layers should be at least 1 mm, preferably 2,5 - 3,0 mm.

Description

Bi-layer plastic container
The invention relates to a container of twin-layer plastic.
Background
Plastic containers for holding different materials, such as food, have been on the market for a long time. The problem with known containers is that they do not meet all the demands of being an effective food container, e.g. where food is to be both heated and eaten, from the same container. An effective food container must be durable towards both heat and discolouring. If it is not durable towards discolouring, staining, it will be stained during use, and thereby limit the number of times it is possible to use the container, since service/cooking of food on a stained foundation, will be considered both unhygienic and unappetizing. The container should also be usable in microwaves and ordinary ovens, and be able to be washed in dishwashers. It should therefore be chemical resistant towards dishwashing liquids of different kinds. As it should be used at least 20-30 times, the colour should not fade either. In addition, such a container should be simple and economic to produce, and meet applicable standards from, for example FDA and BGA.
For a long time, different materials have been tried in order to produce such containers, until now, no materials with satisfying qualities have been found. No known materials are both satisfyingly heat and stain durable.
Object
The main object of the present invention, is therefore to provide a container that can be used as an effective food container, especially for food which is to be heated. It is a particular object to provide a container that can withstand high temperatures, so that it may be used in an oven, but that also can be produced at reasonable costs.
The invention
The object is fulfilled with a container according to the characterizing part of patent claim 1. Further features are given in the dependent claims.
The combination of the materials which are used in the container according to the invention, results in a container that meets all demands of an effective food container. Example
The container will be described hereinafter, with reference to the figures which are illustrative only and not intended to be limiting to the invention, where Fig. 1 shows, in cross section, a container according to the invention, Fig. 2 shows an enlarged cross section of the wall of the container shown in Figure 1.
Figure 1 shows the cross section of the container, including an inner layer 1 and an outer layer 2 which are in contact with each other along the whole of the container. The container is configured with slightly sloping walls, in such a way that it is easier stack, and thereby occupies thereby minimal space when empty for transportation and storage.
The container is twin-layered, an enlarged cross section is shown in Figure 2, where the outer layer 2 is of a heat durable plastic, such as LCP (liquid-crystal-polymer), aromatic polyketones, polyarylates, polyphtalamides or poly(cyclohexylene dimethylene terephtelat). The inner layer 1, i.e. the layer which in use, is in contact with the food, is of a plastic that is durable towards discolouring, staining, for example polyetherimide, polyphenylsulphide, polyethersulphone or polysulphone.
Containers with the outer layer 2 of one of the stain durable materials which are mentioned above, and the inner layer of one of the heat durable materials which are mentioned above, can also be made. However, it will not be possible to use these several times, in any case not 20-30 times. This is due to the fact that the heat durable material is not stain durable, and stains that are difficult to remove will therefore occur.
The ratio between the layers can be varied, and the characteristics of the container will vary accordingly. With a thin inner layer 1 , the container can be used fewer times, and it will stain easily. If the outer layer 2 is reduced, the container will only withstand low temperatures, and if it is increased, the temperature resistance will increase accordingly. The ratio between the layers can be varied, but each layer 1,2 must at least be 0,3 mm thick, and the total thickness of the container wall must be at least 1 mm. The optimal thickness of each layer is about 1,4 mm, and the total thickness is optimal between 2,5 and 3,0 mm. A container according to the invention can be produced by moulding one of the layers, and then spraying or moulding the other on top. When the second layer is laid over, a thin layer of the first layer will melt on the interface 3 (contacting surfaces), and the materials will blend somewhat in a thin layer. The individual molecules will therefore get close to each other, and a strong bond between the layers will be obtained. The bond will be a combination of melting together, and chemical binding. In case the second layer moulds over, the first layer will be moulded in a first mould, and then transferred to a second mould, where at least one part of the mould is a little larger than the first mould. The first layer will be fastened to the part of the mould, having the same size as the first mould, and the other layer will be moulded in the space which is created between the first layer and the mould.
The containers which are shown in the figures were performed by moulding the first layer at 400 °C. Then it was cooled to the right demoulding temperature (160°C) before it was moved to a new organ, which moulded the second layer over, at 330°C. After cooling, the container was finished, and could be used. The container can withstand large temperature oscillations, and therefore it is preferable if the expansion coefficient for the two materials which are to be connected, are quite even. However, the chemical/thermal bond at the interface 3, is probably so strong that the container will not split even if it is produced from two materials with different expansion coefficients.

Claims

Claims:
1. Container of twin-layer plastics, especially for use in catering, characterized in that
- the inner layer (1) is chosen from one of the plastics which is durable towards discolouring; polyetherimide, polyethersulphone, polysulphone or polyphenylsulphide, and
- the outer layer (2) is chosen from one of the plastics which is heat durable; liquid- crystal-polymer, aromatic polyketone, polyarylate, polyphtalamide or poly(cyclohexylene dimethylene terephtalate).
2. Container according to claim 1, characterized in that the heat durable plastic is poly(cyclohexylene dimethylene terephtalate).
3. Container according to claim 1 or 2, characterized in that each layer is at least 0,3 mm thick, and the total thickness of the container wall is at least 1 mm.
4. Container according to claim 3, characterized in that each layer is about 1,4 mm thick, and the total thickness of the container wall is 2,5 to 3,0 mm.
5. Method for producing a container according to any of the preceeding claims, characterized in that firstly, one of the layers is moulded, and then the other layer is moulded or sprayed over.
PCT/NO1999/000380 1998-12-23 1999-12-15 Bi-layer plastic container Ceased WO2000038917A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15877/00A AU1587700A (en) 1998-12-23 1999-12-15 Bi-layer plastic container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO19986070 1998-12-23
NO986070A NO986070L (en) 1998-12-23 1998-12-23 plastic container

Publications (1)

Publication Number Publication Date
WO2000038917A1 true WO2000038917A1 (en) 2000-07-06

Family

ID=19902770

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1999/000380 Ceased WO2000038917A1 (en) 1998-12-23 1999-12-15 Bi-layer plastic container

Country Status (3)

Country Link
AU (1) AU1587700A (en)
NO (1) NO986070L (en)
WO (1) WO2000038917A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2852301A1 (en) * 2003-03-13 2004-09-17 Valois Sas Aerosol device for distributing a liquid product, especially a pharmaceutical product, is produced from high performance synthetic materials rather than aluminum
US7807245B2 (en) 2003-08-19 2010-10-05 Solvay Advanced Polymers, L.L.C. Impact-modified polyamide hollow body

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UST937005I4 (en) * 1973-03-13 1975-08-05 Defensive publication
EP0166243A2 (en) * 1984-05-29 1986-01-02 Amoco Corporation Thermally resistant cookware
EP0182029A2 (en) * 1984-09-20 1986-05-28 General Electric Company Multilayer composite
JPS63152573A (en) * 1986-12-08 1988-06-25 旭化成株式会社 Heat-resistant packaging film for both microwave and oven use
JPH01171515A (en) * 1987-12-28 1989-07-06 Kuraray Co Ltd Heat resisting container for oven
US5124388A (en) * 1990-05-07 1992-06-23 Eastman Kodak Company Films and containers of heat resistant copolyesters
WO1996006125A1 (en) * 1994-08-22 1996-02-29 Eastman Chemical Company Biaxially oriented, heat-set polyester film having improved thermal shrinkage resistance
JPH11279388A (en) * 1998-03-27 1999-10-12 Lining Container Kk Bread-making plastic container and method for producing the same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UST937005I4 (en) * 1973-03-13 1975-08-05 Defensive publication
EP0166243A2 (en) * 1984-05-29 1986-01-02 Amoco Corporation Thermally resistant cookware
EP0182029A2 (en) * 1984-09-20 1986-05-28 General Electric Company Multilayer composite
JPS63152573A (en) * 1986-12-08 1988-06-25 旭化成株式会社 Heat-resistant packaging film for both microwave and oven use
JPH01171515A (en) * 1987-12-28 1989-07-06 Kuraray Co Ltd Heat resisting container for oven
US5124388A (en) * 1990-05-07 1992-06-23 Eastman Kodak Company Films and containers of heat resistant copolyesters
WO1996006125A1 (en) * 1994-08-22 1996-02-29 Eastman Chemical Company Biaxially oriented, heat-set polyester film having improved thermal shrinkage resistance
JPH11279388A (en) * 1998-03-27 1999-10-12 Lining Container Kk Bread-making plastic container and method for producing the same

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 197533, Derwent World Patents Index; AN 1975-55375W, "Polysulphone/ silicone resins compsn for coating metal vessels - for high quality bake ware, has decorative, non-stick, wear resistant props." *
DATABASE WPI Week 198831, Derwent World Patents Index; AN 1988-216689, "Heat resisting film for wrapping food used in e.g. microwave oven - based on polyether-imide polymer." *
DATABASE WPI Week 198933, Derwent World Patents Index; AN 1989-237382, "Heat-resistant oven container-consists of all-aromatic polyester capable forming optically anisotropic melt phase." *
DATABASE WPI Week 200004, Derwent World Patents Index; AN 2000-042001, "Plastic container for manufacturing bread - comprises thermoformed amorphous bread - comprises thermoformed amorphous sheet having poly 1,4-cyclohexylene dimethylene terephthalate and isophthalate resin." *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2852301A1 (en) * 2003-03-13 2004-09-17 Valois Sas Aerosol device for distributing a liquid product, especially a pharmaceutical product, is produced from high performance synthetic materials rather than aluminum
WO2004083045A3 (en) * 2003-03-13 2004-11-04 Valois Sas Distribution device for fluid product
US8033432B2 (en) 2003-03-13 2011-10-11 Valois Sas Distribution device for fluid product
US7807245B2 (en) 2003-08-19 2010-10-05 Solvay Advanced Polymers, L.L.C. Impact-modified polyamide hollow body
US8057732B2 (en) 2003-08-19 2011-11-15 Solvay Advanced Polymers, L.L.C. Method for making a polyamide hollow body

Also Published As

Publication number Publication date
AU1587700A (en) 2000-07-31
NO986070L (en) 2000-06-26
NO986070D0 (en) 1998-12-23

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