CN1359790A - 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
- CN1359790A CN1359790A CN 00127960 CN00127960A CN1359790A CN 1359790 A CN1359790 A CN 1359790A CN 00127960 CN00127960 CN 00127960 CN 00127960 A CN00127960 A CN 00127960A CN 1359790 A CN1359790 A CN 1359790A
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- Prior art keywords
- layer
- sandwich layer
- composite material
- package
- polyvinyl alcohol
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- 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.)
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- Extrusion Moulding Of Plastics Or The Like (AREA)
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
A composite material for wrapping food is composed of core layer and surface layers, and is characterized by that one of said surface layers is polylactic acid layer and another is polyvinyl alcohol layer, which are applied on different surface of core layer respectively by extruding or coating method. Its advantages are easy natural degradation, and high folding tolerance, water-proofing and thermosealing performance and air tightness.
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.
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 (4)
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.
2, a kind of composite material for package of food according to claim 1 is characterized in that 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.
3, a kind of composite material for package of food according to claim 1 and 2 is characterized in that the used material of ply of paper mainly is string or synthetic fibers.
4, 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 true CN1359790A (en) | 2002-07-24 |
| CN1198715C 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010130070A1 (en) * | 2009-05-12 | 2010-11-18 | 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 |
| EP3922667A1 (en) | 2020-06-12 | 2021-12-15 | Universitatea Tehnica din Cluj-Napoca, Centrul Universitar NORD din Baia Mare | Process for obtaining active packages based on polylactic acid modified with nano-composite |
-
2000
- 2000-12-18 CN CN 00127960 patent/CN1198715C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010130070A1 (en) * | 2009-05-12 | 2010-11-18 | 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 |
| EP3922667A1 (en) | 2020-06-12 | 2021-12-15 | Universitatea Tehnica din Cluj-Napoca, Centrul Universitar NORD din Baia Mare | Process for obtaining active packages based on polylactic acid modified with nano-composite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1198715C (en) | 2005-04-27 |
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| 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 |