CN101439782A - Antifog thin film for food packaging - Google Patents
Antifog thin film for food packaging Download PDFInfo
- Publication number
- CN101439782A CN101439782A CNA2008102443545A CN200810244354A CN101439782A CN 101439782 A CN101439782 A CN 101439782A CN A2008102443545 A CNA2008102443545 A CN A2008102443545A CN 200810244354 A CN200810244354 A CN 200810244354A CN 101439782 A CN101439782 A CN 101439782A
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- antifogging
- layer
- thin film
- outside
- fog
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- Extrusion Moulding Of Plastics Or The Like (AREA)
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Abstract
The invention provides an antifogging film used for food package, which is characterized in that the antifogging film adopts an internal addition type production mode to directly add a migration type antifogging agent into a raw material resin during preparing. The antifogging film forms a three-layer structure by a production mode of co-extrusion molding, wherein the three-layer structure uses a transparent film layer as an intermediate layer, and sets an inside antifogging layer and an outside antifogging layer inside and outside the intermediate layer; and the inside antifogging layer and the outside antifogging layer both use ethylene-propylene binary copolymerized polypropylene or ethylene-propylene-butylene ternary polymerized polypropylene as materials, and are added with the migration type antifogging agent. The antifogging film has bilateral antifogging function with strong durability of antifogging effect, and can not be easily washed away or erased.
Description
Technical field
The present invention relates to film, more particularly relate to a kind of as packaging for foodstuff, have the bidirectional stretching polypropylene film of anti-fog function.
Background technology
Anti-fog thin film is that a kind of steam that prevents forms the functional film of tying mist and influencing diaphaneity at film surface.BOPP Biaxially oriented polypropylene antifog film is having under the high low temperature variation, and film surface can not form water smoke owing to the evaporation of moisture, be mainly used in packings such as fresh fruit, vegetables, salad, edible mushroom.Because the aqueous ingredients of fresh commodity own is bigger, temperature has very big variation again in storing and sales process, and produce the opaque water smoke of one deck at the packaging bag internal layer, and cause the user to can't see the interior commodity of bag, and perishable corruption behind the contact of the commodity in the bag water smoke, the shelf-life and the shelf life of fresh commodity have been shortened rapidly, and the appearance of antifog film, not only improved the displaying of fresh commodity, also prolonged the shelf-life and the shelf life of fresh commodity effectively, practicality is quite extensive in the packaging for foodstuff field.
At present, the antifog film existing questions of conventionally form is:
1, its one-sided antifog performance can not satisfy operating needs, and the use in some occasions need have the antifog function of bilateral.
2, adopting the outer form that is coated with, promptly is after antidim compound is dissolved in organic solvent or the water, is applied to the surface of plastic sheeting, though its method is easy, cost is low, and, anti-fog effect poor durability is easily by flush away or wipe.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, provide a kind of have the anti-function of bilateral mist, anti-fog effect durable strong, be difficult for by flush away or the antifog thin film for food packaging wiped.
Technical solution problem of the present invention adopts following technical scheme:
The characteristics of antifog thin film for food packaging of the present invention are:
Described anti-fog thin film adopts the mode of production of inner additive type, directly is added in the material resin migration-type antidim compound when preparing burden;
Described anti-fog thin film adopts the mode of production of coextrusion mold to form three-decker, and described three-decker is to be interlayer with the transparent thin film layer, and inside and outside both sides are set to inboard anti-fog layer and outside anti-fog layer respectively;
Described inboard anti-fog layer and outside anti-fog layer all are to be material with ethene-propylene binary copolymerization polypropylene or ethene-propylene-butylene ternary polymerized polypropylene, are added with 3%～5% migration-type antidim compound in it by weight percentage.
The constructional feature of antifog thin film for food packaging of the present invention is:
Described interlayer is to be raw material with the homo-polypropylene, is added with 5% migration-type antidim compound therein by weight percentage.
The thickness of described interlayer is 18～22 μ; The thickness of described inboard anti-fog layer and outside anti-fog layer is 1～3 μ.
Having a side external surface in the anti-fog layer of described both sides at least is the corona treatment surface.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, attaches in the present invention that type and three-layer co-extruded form make anti-fog layer be difficult for loss, usefulness is lasting.
2, inner additive type of the present invention can directly shape, and does not need to use coating machine to be coated with, and greatly reduces productive costs.
3, the present invention is antifog was 6 months, added 5% antidim compound in interlayer, can reduce antidim compound to the interlayer migration but move to the film top layer constantly, had prolonged transit time, thereby had reached long-time antifog effect.
4, the present invention uses antidim compound to make film have certain wetting ability, and as packaging for foodstuff, the aqueous vapor in its packing can not be dropped on vegetables and the fruit; And at present conventional food fresh keeping bag that uses and fruit are dredged in the packing because the water droplet that forms in moisture content that itself carries and the freezing back air easily forms more water droplet on packaging film, promptly produce " dewfall " phenomenon." dewfall " created advantage for the rapid breeding of germ and growth, the fruits and vegetables after particularly being mechanically damaged, easier cause rotten.Therefore antifog film of the present invention has certain anti-bacterial refreshing effect.
5, the present invention adopts the stretch processes manufacturing, and film gauge uniformity is good, the mechanical strength height, and the glossiness height, the transparency is good.
Below by the specific embodiment, the invention will be further described in conjunction with the accompanying drawings:
The specific embodiment
Adopt the mode of production of inner additive type, when preparing burden, directly be added in the material resin migration-type antidim compound;
Adopt the mode of production of coextrusion mold to form three-decker, three-decker is to be interlayer with the transparent thin film layer, can be the conventional homo-polypropylene that adopts, and the thickness of interlayer is 18～22 μ; Inside and outside both sides are set to inboard anti-fog layer and outside anti-fog layer respectively, and the thickness of anti-fog layer is set to 1～3 μ;
Inboard anti-fog layer and outside anti-fog layer all are that second third Bipolymer or terpolymer are material, are added with 3%～5% migration-type antidim compound in it by weight percentage.
Described antidim compound is the Co-polypropylene of the carboxylate polymerization remodeling of aliphatic acid and polyalcohol.The AF1002SC antidim compound of the Belgian A.SCHULMAN of use company in concrete the enforcement.
Having a side external surface in the anti-fog layer of both sides at least is the corona treatment surface.The process corona treatment has improved the surface tension of film, can improve the adhesive ability of printing-ink, improves printing effect.
In concrete the enforcement, by biaxial tension, three layers of conventional mode of production that is total to agent, process fusion successively, plasticizing, metering are extruded, the moulding of sheet material Quench; After the moulding again through preheating, according to the stretching of certain multiple vertical and horizontal, thermal finalization, thickness measuring feedback, deburring, corona treatment, rolling; After overaging, cut, make the antifog film finished product.
Claims (4)
1, antifog thin film for food packaging is characterized in that:
Described anti-fog thin film adopts the mode of production of inner additive type, directly is added in the material resin migration-type antidim compound when preparing burden;
Described anti-fog thin film adopts the mode of production of coextrusion mold to form three-decker, and described three-decker is to be interlayer with the transparent thin film layer, and inside and outside both sides are set to inboard anti-fog layer and outside anti-fog layer respectively;
Described inboard anti-fog layer and outside anti-fog layer all are to be material with ethene-propylene binary copolymerization polypropylene or ethene-propylene-butylene ternary polymerized polypropylene, are added with 3%～5% migration-type antidim compound in it by weight percentage.
2, antifog thin film for food packaging according to claim 1 is characterized in that described interlayer is is raw material with the homo-polypropylene, is added with 5% migration-type antidim compound therein by weight percentage.
3, antifog thin film for food packaging according to claim 1 and 2, the thickness that it is characterized in that described interlayer is 18～22 μ; The thickness of described inboard anti-fog layer and outside anti-fog layer is 1～3 μ.
4, antifog thin film for food packaging according to claim 1 is characterized in that having a side external surface in the anti-fog layer of described both sides at least is the corona treatment surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102443545A CN101439782A (en) | 2008-11-28 | 2008-11-28 | Antifog thin film for food packaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102443545A CN101439782A (en) | 2008-11-28 | 2008-11-28 | Antifog thin film for food packaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101439782A true CN101439782A (en) | 2009-05-27 |
Family
ID=40724429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102443545A Pending CN101439782A (en) | 2008-11-28 | 2008-11-28 | Antifog thin film for food packaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101439782A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173158A (en) * | 2010-12-15 | 2011-09-07 | 石狮市炎英塑胶制品有限公司 | Antifogging film and preparation method thereof |
| CN102285182A (en) * | 2011-06-20 | 2011-12-21 | 江阴市通利包装材料有限公司 | Antifogging film used for packaging food |
| CN102873951A (en) * | 2012-09-18 | 2013-01-16 | 海南赛诺实业有限公司 | Printable biaxially-oriented polypropylene anti-mist film and manufacturing method thereof |
| CN104260525A (en) * | 2014-09-25 | 2015-01-07 | 海南赛诺实业有限公司 | Biaxially-oriented polypropylene anti-mist film with five-layer coextrusion and manufacturing method thereof |
| CN109205054A (en) * | 2017-07-07 | 2019-01-15 | 株式会社小林 | food packaging bag |
| TWI704054B (en) * | 2018-12-25 | 2020-09-11 | 南亞塑膠工業股份有限公司 | An anti-fog bag for packaging fruits and vegetables |
-
2008
- 2008-11-28 CN CNA2008102443545A patent/CN101439782A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173158A (en) * | 2010-12-15 | 2011-09-07 | 石狮市炎英塑胶制品有限公司 | Antifogging film and preparation method thereof |
| CN102285182A (en) * | 2011-06-20 | 2011-12-21 | 江阴市通利包装材料有限公司 | Antifogging film used for packaging food |
| CN102873951A (en) * | 2012-09-18 | 2013-01-16 | 海南赛诺实业有限公司 | Printable biaxially-oriented polypropylene anti-mist film and manufacturing method thereof |
| CN104260525A (en) * | 2014-09-25 | 2015-01-07 | 海南赛诺实业有限公司 | Biaxially-oriented polypropylene anti-mist film with five-layer coextrusion and manufacturing method thereof |
| CN109205054A (en) * | 2017-07-07 | 2019-01-15 | 株式会社小林 | food packaging bag |
| TWI704054B (en) * | 2018-12-25 | 2020-09-11 | 南亞塑膠工業股份有限公司 | An anti-fog bag for packaging fruits and vegetables |
| US11427390B2 (en) | 2018-12-25 | 2022-08-30 | Nan Ya Plastics Corporation | Fruit and vegetable anti-fog packaging bag |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090527 |