CN102501512A - Seven-layer co-extrusion high-barrier film - Google Patents
Seven-layer co-extrusion high-barrier film Download PDFInfo
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- CN102501512A CN102501512A CN2011103765336A CN201110376533A CN102501512A CN 102501512 A CN102501512 A CN 102501512A CN 2011103765336 A CN2011103765336 A CN 2011103765336A CN 201110376533 A CN201110376533 A CN 201110376533A CN 102501512 A CN102501512 A CN 102501512A
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Abstract
A seven-layer co-extrusion high-barrier film relates to the technical field of flexible package films and sequentially comprises a polypropylene surface layer, a high-pressure polyethylene layer, a nylon resin layer and an ethylene/ethylene-vinyl alcohol copolymer layer from top to bottom. The seven-layer co-extrusion high-barrier film is characterized in that an adhesive layer is arranged between the nylon resin layer and the ethylene/ethylene-vinyl alcohol copolymer layer, and the bottom of the ethylene/ethylene-vinyl alcohol copolymer layer is provided with a bottom protecting layer. Compared with a traditional film, the high-barrier film has higher permeability resistance, toughness, folding resistance and puncture resistance, and stable gas resistance, water resistance and oxygen resistance.
Description
Technical field
The present invention relates to the flexible packaging film technical field, be specifically related to a kind of seven-layer co-extrusion high-isolation film.
Background technology
High-isolation film be very strong material of barrier properties for gases and heat sew up property, polyolefin that moisture barrier property is very strong is extruded simultaneously and is formed, and is the film of sandwich construction.At packaging field, EVOH (ethylene/vinyl alcohol copolymer) processes the composite membrane intermediate barrier layer, is applied in all rigid and flexible packagings; In grocery trade, be used for aseptic packaging, heat jar and retort pouch, packing dairy produce, meat, canned fruit juice and flavouring; Aspect non-food stuff, be used for packing solvent, chemicals, air conditioner structure spare, petrol drum liner, electronic component etc.Aspect packaging for foodstuff, the plastic containers of EVOH fully can instead of glass and canister, and domestic how tame aquatic products company outlet seafood just uses PE/EVOH/PA/RVOH/PE five-layer co-squeezing membrane vacuum-packed.Accelerating the research of EVOH composite membrane simultaneously, abroad also at research EVOH stretch orientation, new E VOH film is 3 times of existing high performance non-stretching EVOH film to the barrier property of gas.EVOH also can be used as barrier material and is coated on other synthetic resin packaging materials in addition, plays to strengthen the barrier property effect.The performance of high-isolation film of the prior art all haves much room for improvement in many-side.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of gas barrier property good, the seven-layer co-extrusion high-isolation film of anti-puncture.
Technical problem to be solved by this invention adopts following technical scheme to realize,
A kind of seven-layer co-extrusion high-isolation film; Form by polypropylene top layer, polyethylene from high pressure process layer, polyamide resin layer and ethylene/vinyl alcohol copolymer layer successively from top to bottom; It is characterized in that: be provided with adhesive phase between described polyamide resin layer and the ethylene/vinyl alcohol copolymer layer, described ethylene/vinyl alcohol copolymer layer bottom surface is provided with the protective underlayer layer.
Described adhesive phase is a binder resin layer, is used for the bonding of various interlaminar resins, runs into high temperature and does not have chemical composition and overflow, and environmental protection index is superior to the liquid adhesive of chemical synthesis.
Described protective underlayer layer is the metallocene resin layer, is used for the internal layer heat-sealing of oil rub resistance and stronger anti-puncture characteristic is arranged.
The invention has the beneficial effects as follows: high-isolation film of the present invention has higher gas barrier property, toughness, folding resistance and puncture resistance than traditional film, choke, block water and oxygen resistance stable.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1; A kind of seven-layer co-extrusion high-isolation film; Form by polypropylene top layer, polyethylene from high pressure process layer, polyamide resin layer and ethylene/vinyl alcohol copolymer layer successively from top to bottom; Be provided with adhesive phase between polyamide resin layer and the ethylene/vinyl alcohol copolymer layer, ethylene/vinyl alcohol copolymer layer bottom surface is provided with the protective underlayer layer.
Adhesive phase is a binder resin layer; Be used for the bonding of various interlaminar resins, run into high temperature and do not have chemical composition and overflow, environmental protection index is superior to the liquid adhesive of chemical synthesis; The protective underlayer layer is the metallocene resin layer, is used for the internal layer heat-sealing of oil rub resistance and stronger anti-puncture characteristic is arranged.
The polypropylene top layer is used to improve the brightness of film and can carry out colored printing on the film top layer.
The polyethylene from high pressure process layer is used for overall flexibility and folding resistance that waterproof immerses and can adjust film.
Polyamide resin layer is used for well-pressed degree and impact strength that choke resistance oxygen also can provide film.
The ethylene/vinyl alcohol copolymer layer, a kind of novel high-barrier resin has higher gas barrier property to all gases and oxygen.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. seven-layer co-extrusion high-isolation film; Form by polypropylene top layer, polyethylene from high pressure process layer, polyamide resin layer and ethylene/vinyl alcohol copolymer layer successively from top to bottom; It is characterized in that: be provided with adhesive phase between described polyamide resin layer and the ethylene/vinyl alcohol copolymer layer, described ethylene/vinyl alcohol copolymer layer bottom surface is provided with the protective underlayer layer.
2. seven-layer co-extrusion high-isolation film according to claim 1 is characterized in that: described adhesive phase is a binder resin layer.
3. seven-layer co-extrusion high-isolation film according to claim 1 is characterized in that: described protective underlayer layer is the metallocene resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103765336A CN102501512A (en) | 2011-11-23 | 2011-11-23 | Seven-layer co-extrusion high-barrier film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103765336A CN102501512A (en) | 2011-11-23 | 2011-11-23 | Seven-layer co-extrusion high-barrier film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102501512A true CN102501512A (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103765336A Pending CN102501512A (en) | 2011-11-23 | 2011-11-23 | Seven-layer co-extrusion high-barrier film |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103009753A (en) * | 2012-12-26 | 2013-04-03 | 郦国强 | Polyethylene terephthalate (PET) extrusion composite material for sealing aseptic packages and preparation method thereof |
| CN104859242A (en) * | 2015-04-28 | 2015-08-26 | 桐城市新丰彩印包装有限公司 | Composite film |
| CN107501704A (en) * | 2017-08-23 | 2017-12-22 | 宁波华丰包装有限公司 | EVOH high-barrier co-extrusion films |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724254A (en) * | 2005-06-29 | 2006-01-25 | 江阴申恒特种新材料有限公司 | High resistively nine-layer co-extrusion-blown moulding film and its preparation process |
| CN101081653A (en) * | 2007-07-16 | 2007-12-05 | 刘建林 | High-obstruct multiple-layer film for packaging liquid and manufacturing method thereof |
-
2011
- 2011-11-23 CN CN2011103765336A patent/CN102501512A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1724254A (en) * | 2005-06-29 | 2006-01-25 | 江阴申恒特种新材料有限公司 | High resistively nine-layer co-extrusion-blown moulding film and its preparation process |
| CN101081653A (en) * | 2007-07-16 | 2007-12-05 | 刘建林 | High-obstruct multiple-layer film for packaging liquid and manufacturing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103009753A (en) * | 2012-12-26 | 2013-04-03 | 郦国强 | Polyethylene terephthalate (PET) extrusion composite material for sealing aseptic packages and preparation method thereof |
| CN103009753B (en) * | 2012-12-26 | 2016-01-20 | 郦国强 | PET for aseptic packaging sealing extrudes composite and preparation method thereof |
| CN104859242A (en) * | 2015-04-28 | 2015-08-26 | 桐城市新丰彩印包装有限公司 | Composite film |
| CN107501704A (en) * | 2017-08-23 | 2017-12-22 | 宁波华丰包装有限公司 | EVOH high-barrier co-extrusion films |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120620 |