WO2002007970A1 - Material for packing purposes - Google Patents
Material for packing purposes Download PDFInfo
- Publication number
- WO2002007970A1 WO2002007970A1 PCT/SE2001/001630 SE0101630W WO0207970A1 WO 2002007970 A1 WO2002007970 A1 WO 2002007970A1 SE 0101630 W SE0101630 W SE 0101630W WO 0207970 A1 WO0207970 A1 WO 0207970A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- polycarbonate
- amorphous polyester
- coextruded
- heat
- Prior art date
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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
Definitions
- a "layer for preventing crack formation” is understood here as meaning a layer which exhibits a negligible stretching and which thereby prevents crack formation in a barrier layer which has been deposited on the layer. While it is true that the coextruded laminate in JP 07-186318 provides a combination which is suitable as far as recovery is concerned, JP 07- 186318 does not provide a coextruded laminate which exhibits heat resistance and heat sealability at the same time as the constituent components are thermoformable simultaneously.
- the present invention furthermore relates to a material for packing purposes, which material comprises a coextruded laminate, wherein said material exhibiting heat resistance at the same time as heat sealability, and wherein the constituent components of the coextruded laminate being thermoformable simultaneously and providing process advantages in the form of improved heat transition in the coextruded laminate.
- Said material comprises a coextruded laminate, wherein said laminate preferably being coextruded by means of single-slot coextrusion.
- Another embodiment according to the present invention relates to a material, wherein said material, from said first layer to said second layer, comprising a coextruded laminate consisting of polycarbonate, amorphous polyester, ethyl vinyl alcohol and amorphous polyester.
- polyethylene can be laminated on if sealability to PE systems is desired.
- polyethylene When polyethylene is laminated onto said material, it can expediently be laminated on in a layer having a thickness of from 20 to 60 ⁇ .
- Another embodiment according to the present invention relates to a process for packing in which a material which has been described here is used, wherein it being possible for said polycarbonate to be thermoformed at the same time as the amorphous polyester which is included in said material.
- the present invention furthermore relates to a process for thermoforming in which a material which has been described here is used, wherein said polycarbonate being thermoformed at the same time as the amorphous polyester which is included in said material.
- the layer of polycarbonate remains tack-free towards currently available sealing jaws up to approx. 180°C and exhibits the desired heat-resistance, and the layers of amorphous polyester have a Tg temperature (glass transition temperature) of about 85°C, wherein it in the present case being the second layer of amorphous polyester which exhibits heat sealability.
- the layer of ethyl vinyl alcohol forms a gas and/or vapour barrier in the coextruded laminates.
- the components which are included in the coextruded laminate exhibit the unique property of being thermoformable simultaneously.
- polyethylene is also used in this present example, and the same conventional methodology as in Implementation Example 2 is employed for the coextruded laminate consisting, in the following order, of a layer of polycarbonate, a layer of amorphous polyester, a layer of ethyl vinyl alcohol and a second layer of amorphous polyester.
- the layer of polyethylene is a layer which is applied using a conventional lamination technique.
- the polyethylene layer has a thickness of approx. 40 ⁇ and the other layers have thicknesses, properties and functions in accordance with the corresponding layers in Implementation Example 2.
- the polyethylene layer exhibits sealability to PE systems and can also provide a peel effect, i.e. packings which comprise a peel effect can be torn open.
Landscapes
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001271212A AU2001271212A1 (en) | 2000-07-21 | 2001-07-16 | Material for packing purposes |
EP01950187A EP1326747A1 (en) | 2000-07-21 | 2001-07-16 | Material for packing purposes |
NO20030278A NO330895B1 (en) | 2000-07-21 | 2003-01-20 | Thermoformable material for packaging formula |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0002734-2 | 2000-07-21 | ||
SE0002734A SE523074C2 (en) | 2000-07-21 | 2000-07-21 | Materials for packaging purposes |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002007970A1 true WO2002007970A1 (en) | 2002-01-31 |
WO2002007970B1 WO2002007970B1 (en) | 2002-05-23 |
Family
ID=20280560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2001/001630 WO2002007970A1 (en) | 2000-07-21 | 2001-07-16 | Material for packing purposes |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1326747A1 (en) |
AU (1) | AU2001271212A1 (en) |
NO (1) | NO330895B1 (en) |
SE (1) | SE523074C2 (en) |
WO (1) | WO2002007970A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4708896A (en) * | 1985-08-19 | 1987-11-24 | Fuji Photo Film Co., Ltd. | Easily openable packaging material for photographic photosensitive materials |
US4784906A (en) * | 1985-09-11 | 1988-11-15 | Fuji Photo Film Co., Ltd. | Packaging material for photosensitive materials for photographic purpose |
US4874647A (en) * | 1986-12-04 | 1989-10-17 | Mitsui Petrochemical Industries, Inc. | Polyester composition, molded polyester laminate and use thereof |
JPH07186318A (en) | 1993-12-27 | 1995-07-25 | Dainippon Printing Co Ltd | Deposited film |
EP0928683A2 (en) * | 1998-01-06 | 1999-07-14 | HNA Holdings, Inc. | Co-processable multi-layer laminates for forming high strength, haze-free, transparent articles and methods of producing same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH047150A (en) * | 1990-04-24 | 1992-01-10 | Kanegafuchi Chem Ind Co Ltd | Laminated material for packing food, food packing container composed thereof and production or the container |
-
2000
- 2000-07-21 SE SE0002734A patent/SE523074C2/en not_active IP Right Cessation
-
2001
- 2001-07-16 WO PCT/SE2001/001630 patent/WO2002007970A1/en active Application Filing
- 2001-07-16 EP EP01950187A patent/EP1326747A1/en not_active Withdrawn
- 2001-07-16 AU AU2001271212A patent/AU2001271212A1/en not_active Abandoned
-
2003
- 2003-01-20 NO NO20030278A patent/NO330895B1/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4708896A (en) * | 1985-08-19 | 1987-11-24 | Fuji Photo Film Co., Ltd. | Easily openable packaging material for photographic photosensitive materials |
US4784906A (en) * | 1985-09-11 | 1988-11-15 | Fuji Photo Film Co., Ltd. | Packaging material for photosensitive materials for photographic purpose |
US4874647A (en) * | 1986-12-04 | 1989-10-17 | Mitsui Petrochemical Industries, Inc. | Polyester composition, molded polyester laminate and use thereof |
JPH07186318A (en) | 1993-12-27 | 1995-07-25 | Dainippon Printing Co Ltd | Deposited film |
EP0928683A2 (en) * | 1998-01-06 | 1999-07-14 | HNA Holdings, Inc. | Co-processable multi-layer laminates for forming high strength, haze-free, transparent articles and methods of producing same |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Week 199538, Derwent World Patents Index; AN 1995-289062, XP002963151 * |
Also Published As
Publication number | Publication date |
---|---|
AU2001271212A1 (en) | 2002-02-05 |
EP1326747A1 (en) | 2003-07-16 |
SE523074C2 (en) | 2004-03-23 |
SE0002734D0 (en) | 2000-07-21 |
NO20030278L (en) | 2003-02-20 |
SE0002734L (en) | 2002-01-22 |
NO330895B1 (en) | 2011-08-08 |
NO20030278D0 (en) | 2003-01-20 |
WO2002007970B1 (en) | 2002-05-23 |
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