CN1198715C - Composite material for package of food and its preparing process - Google Patents
Composite material for package of food and its preparing process Download PDFInfo
- Publication number
- CN1198715C CN1198715C CN 00127960 CN00127960A CN1198715C CN 1198715 C CN1198715 C CN 1198715C CN 00127960 CN00127960 CN 00127960 CN 00127960 A CN00127960 A CN 00127960A CN 1198715 C CN1198715 C CN 1198715C
- Authority
- CN
- China
- Prior art keywords
- layer
- sandwich layer
- composite material
- polyvinyl alcohol
- package
- 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.)
- Expired - Fee Related
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 235000013305 food Nutrition 0.000 title claims abstract description 19
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 19
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 15
- 239000004626 polylactic acid Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 abstract description 10
- 235000021056 liquid food Nutrition 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Images
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention discloses a composite material for packing food and a production method thereof. The composite material for packing food comprises a sandwich layer, a polylactic acid layer is coated on the upper side of the sandwich layer, and a polyvinyl alcohol layer is coated on the lower side of the sandwich layer. A polylactic acid and a polyvinyl alcohol are respectively coated on the upper side and the lower side of the sandwich layer by an extrusion method or a coating method. The composite material for packing food of the present invention has the advantages of easy natural degradation and good foldability, water resisting property, air isolation property and heat-sealing property, and the composite material is suitable for making a liquid food container.
Description
The invention belongs to the packaging for foodstuff field, relate to a kind of composite material for package of food and production method thereof.
The disclosed Chinese patent 1055506A in 1991 (application number is 90105802.5) has introduced a kind of three-layer plastic compound film.But with the difficult liquid food packing container that is manufactured with certain collapsed shape of this laminated film, and this laminated film is difficult for degraded under field conditions (factors), is unfavorable for environmental protection.
The objective of the invention is to develop a kind of composite material for package of food and production method thereof at above-mentioned deficiency.
Embodiment of the present invention are: a kind of composite material for package of food, include sandwich layer, and be coated with polylactic acid layers at the sandwich layer upside, be coated with polyvinyl alcohol layer at the sandwich layer downside; Sandwich layer is made up of two layers of ply of paper and layer of polyethylene alcohol layer, and polyvinyl alcohol layer is between two layers of ply of paper.
The production method of above-mentioned composite material for package of food, described production method is extrusion molding or coating process, the production technology of extrusion molding is with extruder PLA to be expressed into the sandwich layer upside, make PLA be applied to the sandwich layer upside with the form of thin layer, with extruder polyvinyl alcohol is expressed into the sandwich layer downside, makes polyvinyl alcohol be applied to the sandwich layer downside with the form of thin layer; The production technology of coating process is to use coating device, makes PLA be applied to the upside of sandwich layer with the form of thin layer, makes polyvinyl alcohol be applied to the downside of sandwich layer with the form of thin layer.
Advantage of the present invention: the one, described composite material for package of food can be folded into corresponding package shape according to the packing needs of liquid food; The 2nd, described composite material for package of food has adopted PLA and polyvinyl alcohol as skin, and therefore, it is degraded more under field conditions (factors); The 3rd, described composite material for package of food has waterproof, trapping and heat sealability preferably.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of square liquid food packing box.
Fig. 3 is the structural representation of roof shape liquid food packing box.
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, the present invention includes sandwich layer, polylactic acid layers (1) and polyvinyl alcohol layer (5), polylactic acid layers (1) is coated the sandwich layer upside, and polyvinyl alcohol layer (5) is coated the sandwich layer downside.Above-mentioned sandwich layer is made up of two layers of ply of paper (2) (4) and layer of polyethylene alcohol layer (3), and polyvinyl alcohol layer (3) is positioned between two layers of ply of paper (2) (4).The used material of ply of paper (2) (4) mainly is a string.
The production method of above-mentioned composite material for package of food is an extrusion molding, the production technology of extrusion molding is: with extruder PLA is expressed into the sandwich layer upside, make PLA be applied to the sandwich layer upside with the form of thin layer, with extruder polyvinyl alcohol is expressed into the sandwich layer downside, makes polyvinyl alcohol be applied to the downside of sandwich layer with the form of thin layer.
The production method of above-mentioned composite material for package of food also can be coating process, and the production technology of coating process is: use coating device, make PLA be applied to the upside of sandwich layer with the form of thin layer, make polyvinyl alcohol be applied to the downside of sandwich layer with the form of thin layer.
The used material of the ply of paper of above-mentioned composite material for package of food (2) (4) can be based on synthetic fibers.
Composite material for package of food of the present invention must be made square liquid food packing box as shown in Figure 2, also can make roof shape liquid food packing box as shown in Figure 3, or the liquid food packing container of other shape.
Claims (3)
1, a kind of composite material for package of food includes sandwich layer, it is characterized in that being coated with polylactic acid layers at the sandwich layer upside, has been coated with polyvinyl alcohol layer at the sandwich layer downside; Sandwich layer is made up of two layers of ply of paper and layer of polyethylene alcohol layer, and polyvinyl alcohol layer is between two layers of ply of paper.
2. a kind of composite material for package of food according to claim 1 is characterized in that the used material of ply of paper mainly is string or synthetic fibers.
3, the production method of a kind of composite material for package of food according to claim 1 is characterized in that described production method is extrusion molding or coating process; The production technology of extrusion molding is with extruder PLA to be expressed into the sandwich layer upside, makes PLA be applied to the sandwich layer upside with the form of thin layer, with extruder polyvinyl alcohol is expressed into the sandwich layer downside, makes polyvinyl alcohol be applied to the sandwich layer downside with the form of thin layer; The production technology of coating process is to use coating device, makes PLA be applied to the upside of sandwich layer with the form of thin layer, makes polyvinyl alcohol be applied to the downside of sandwich layer with the form of thin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127960 CN1198715C (en) | 2000-12-18 | 2000-12-18 | Composite material for package of food and its preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127960 CN1198715C (en) | 2000-12-18 | 2000-12-18 | Composite material for package of food and its preparing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1359790A CN1359790A (en) | 2002-07-24 |
| CN1198715C true CN1198715C (en) | 2005-04-27 |
Family
ID=4592870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00127960 Expired - Fee Related CN1198715C (en) | 2000-12-18 | 2000-12-18 | Composite material for package of food and its preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1198715C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101884489A (en) * | 2009-05-12 | 2010-11-17 | 伟盟工业股份有限公司 | Paper cup and cup sleeve |
| CN103612455A (en) * | 2013-11-22 | 2014-03-05 | 傅杰 | PLA (Polylactic Acid)-EVOH (Ethylene Vinyl Alcohol) composite material |
| RO134492A0 (en) | 2020-06-12 | 2020-10-30 | Universitatea Tehnică Din Cluj-Napoca - Centrul Universitar Nord Din Baia Mare | Process for producing active food packaging based on polylactic acid modified with nanocomposite |
-
2000
- 2000-12-18 CN CN 00127960 patent/CN1198715C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1359790A (en) | 2002-07-24 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |