CN103612455A - PLA (Polylactic Acid)-EVOH (Ethylene Vinyl Alcohol) composite material - Google Patents
PLA (Polylactic Acid)-EVOH (Ethylene Vinyl Alcohol) composite material Download PDFInfo
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- CN103612455A CN103612455A CN201310590631.9A CN201310590631A CN103612455A CN 103612455 A CN103612455 A CN 103612455A CN 201310590631 A CN201310590631 A CN 201310590631A CN 103612455 A CN103612455 A CN 103612455A
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- Prior art keywords
- pla
- evoh
- composite material
- intermediate layer
- extruding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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Abstract
The invention discloses a PLA(Polylactic Acid)-EVOH (Ethylene Vinyl Alcohol) composite material and relates to the technical field of food packaging materials. A preparation method of the PLA-EVOH composite material comprises the following steps: preparing the PLA material into a PLA upper layer by charging, heat-fusing and extruding; preparing the EVOH material into an EVOH intermediate layer by charging, heat-fusing and extruding; preparing the PLA material into a PLA lower layer by charging, heat-fusing and extruding; and extruding and forming after the PLA upper layer, the EVOH intermediate layer and the PLA lower layer are bonded together. The PLA-EVOH composite material disclosed by the invention is manufactured from a degradable high-barrier material, simple in process, easy to prepare, light in size and easy to process; and moreover, after food is completely eaten, package is discarded without causing harms to environment.
Description
Technical field:
The present invention relates to packaging material for food technical field, be specifically related to a kind of degradable PLA-EVOH composite.
Background technology:
Food pack refers to directly and Food Contact, for the membrane container of splendid attire and protection food, for packaging for foodstuff most importantly PP and PE, is exactly polypropylene and vinyon now.Polyethylene is generally as film, packaging bag, Fruit basket etc.Polypropylene is mess-tin, crisper, mess-tin, water tumbler, sanitary cup, bucket basin etc.Security performance by comparison these two kinds can both meet packaging for foodstuff, with regard to the present relevant report also not going wrong with regard to PP, PE product in the world.Merlon has carried out fierce debate with regard to bisphenol-A problem to children's reproductive development problem, and some countries have forbidden the use of bisphenol-A in package plastics of food.
Existing market is more is to use high barrier material to pack as food fresh keeping, and this type of material is high crystalline solid, non-degradable.Aspect food fresh keeping, high barrier material has irreplaceable effect, but complete when food consumption, packaging material need to abandon, and now will work the mischief to environment.
Summary of the invention:
The object of this invention is to provide a kind of PLA-EVOH composite, it adopts degradable high barrier material to be made, technique simply, easily produce, lightweight and portable in volume, easily process, after food consumption, packing is not abandoned and can environment be worked the mischief.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions: it comprises PLA upper strata, EVOH intermediate layer ,PLA lower floor, and PLA upper strata ,PLA lower floor is closely arranged on respectively the both sides up and down in EVOH intermediate layer.
Preparation method of the present invention is: by PLA material by reinforced, heat merges, be crushed to PLA upper strata; By EVOH material by reinforced, heat merges, be crushed to EVOH intermediate layer; By PLA material by reinforced, heat merges, be crushed to PLA lower floor; By PLA upper strata, the rear extrusion modling glued together of EVOH intermediate layer ,PLA lower floor.
Described PLA is that corn extract " poly lactose " can natural degradation; EVOH is the copolymerization object height crystalline solid of ethylene-vinyl alcohol, combustion degradation; And the catabolite of PLA and EVOH is all water and carbon dioxide.
The present invention adopts degradable high barrier material to be made, technique simply, easily produce, lightweight and portable in volume, easily process, after food consumption, packing is not abandoned and can environment be worked the mischief.
The specific embodiment:
This specific embodiment is by the following technical solutions: it comprises PLA upper strata, EVOH intermediate layer ,PLA lower floor, and PLA upper strata ,PLA lower floor is closely arranged on respectively the both sides up and down in EVOH intermediate layer.
The preparation method of this specific embodiment is: by PLA material by reinforced, heat merges, be crushed to PLA upper strata; By EVOH material by reinforced, heat merges, be crushed to EVOH intermediate layer; By PLA material by reinforced, heat merges, be crushed to PLA lower floor; By PLA upper strata, the rear extrusion modling glued together of EVOH intermediate layer ,PLA lower floor.
Described PLA is that corn extract " poly lactose " can natural degradation; EVOH is the copolymerization object height crystalline solid of ethylene-vinyl alcohol, combustion degradation; And the catabolite of PLA and EVOH is all water and carbon dioxide.
This specific embodiment adopts degradable high barrier material to be made, technique simply, easily produce, lightweight and portable in volume, easily process, after food consumption, packing is not abandoned and can environment be worked the mischief.
Claims (2)
1.PLA-EVOH composite, is characterized in that it comprises PLA upper strata, EVOH intermediate layer ,PLA lower floor, and PLA upper strata ,PLA lower floor is closely arranged on respectively the both sides up and down in EVOH intermediate layer.
2.PLA-EVOH composite, is characterized in that its preparation method is: by PLA material by reinforced, heat merges, be crushed to PLA upper strata; By EVOH material by reinforced, heat merges, be crushed to EVOH intermediate layer; By PLA material by reinforced, heat merges, be crushed to PLA lower floor; By PLA upper strata, the rear extrusion modling glued together of EVOH intermediate layer ,PLA lower floor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310590631.9A CN103612455A (en) | 2013-11-22 | 2013-11-22 | PLA (Polylactic Acid)-EVOH (Ethylene Vinyl Alcohol) composite material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310590631.9A CN103612455A (en) | 2013-11-22 | 2013-11-22 | PLA (Polylactic Acid)-EVOH (Ethylene Vinyl Alcohol) composite material |
Publications (1)
Publication Number | Publication Date |
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CN103612455A true CN103612455A (en) | 2014-03-05 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201310590631.9A Pending CN103612455A (en) | 2013-11-22 | 2013-11-22 | PLA (Polylactic Acid)-EVOH (Ethylene Vinyl Alcohol) composite material |
Country Status (1)
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CN (1) | CN103612455A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105838048A (en) * | 2016-06-06 | 2016-08-10 | 山东天野生物降解新材料科技有限公司 | Special fully-biodegradable mulch film material conducive to soil moisture preservation and preparation method of special fully-biodegradable mulch film material |
CN106084675A (en) * | 2016-06-06 | 2016-11-09 | 山东天野生物降解新材料科技有限公司 | A kind of whole life cycle design being beneficial to soil moisture conservation and preparation method thereof |
CN113524831A (en) * | 2021-08-05 | 2021-10-22 | 中国科学院长春应用化学研究所 | Polylactic acid-based environment-friendly agricultural mulching film and preparation method thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1359790A (en) * | 2000-12-18 | 2002-07-24 | 平湖市比例包装材料有限公司 | Composite material for package of food and its preparing process |
JP2008155385A (en) * | 2006-12-21 | 2008-07-10 | Yamato Esuron Kk | Food storage container and laminated film |
CN101678920A (en) * | 2007-06-06 | 2010-03-24 | 东洋制罐株式会社 | Biodegradable resin bottle and process for producing the same |
CN101815748A (en) * | 2007-07-23 | 2010-08-25 | Skc株式会社 | Biodegradable biaxially oriented laminated film |
-
2013
- 2013-11-22 CN CN201310590631.9A patent/CN103612455A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1359790A (en) * | 2000-12-18 | 2002-07-24 | 平湖市比例包装材料有限公司 | Composite material for package of food and its preparing process |
JP2008155385A (en) * | 2006-12-21 | 2008-07-10 | Yamato Esuron Kk | Food storage container and laminated film |
CN101678920A (en) * | 2007-06-06 | 2010-03-24 | 东洋制罐株式会社 | Biodegradable resin bottle and process for producing the same |
CN101815748A (en) * | 2007-07-23 | 2010-08-25 | Skc株式会社 | Biodegradable biaxially oriented laminated film |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105838048A (en) * | 2016-06-06 | 2016-08-10 | 山东天野生物降解新材料科技有限公司 | Special fully-biodegradable mulch film material conducive to soil moisture preservation and preparation method of special fully-biodegradable mulch film material |
CN106084675A (en) * | 2016-06-06 | 2016-11-09 | 山东天野生物降解新材料科技有限公司 | A kind of whole life cycle design being beneficial to soil moisture conservation and preparation method thereof |
CN106084675B (en) * | 2016-06-06 | 2017-08-29 | 山东天野生物降解新材料科技有限公司 | A kind of whole life cycle design for being beneficial to soil moisture conservation and preparation method thereof |
CN113524831A (en) * | 2021-08-05 | 2021-10-22 | 中国科学院长春应用化学研究所 | Polylactic acid-based environment-friendly agricultural mulching film and preparation method thereof |
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Application publication date: 20140305 |
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