CN201932498U - Cast polypropylene film with cohesive stripping function - Google Patents
Cast polypropylene film with cohesive stripping function Download PDFInfo
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- CN201932498U CN201932498U CN2010206662510U CN201020666251U CN201932498U CN 201932498 U CN201932498 U CN 201932498U CN 2010206662510 U CN2010206662510 U CN 2010206662510U CN 201020666251 U CN201020666251 U CN 201020666251U CN 201932498 U CN201932498 U CN 201932498U
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- polypropylene film
- cohesive
- cast polypropylene
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Abstract
The utility model belongs to the technical field of food packaging materials. A cast polypropylene film with a cohesive stripping function is produced by adopting a three-layer coextrusion process and comprises a heat sealing layer, a supporting layer and a corona layer; the heat sealing layer is randomly copolymerized polypropylene with high-temperature resistance, takes homopolymerized polypropylene with high-temperature resistance as a substrate, is incompatible with a polymerized ethylene or ethylene-vinyl acetate copolymer and is evenly dispersed into the substrate by the form of a solitary island; meanwhile, the heat sealing layer also contains an additive; homopolymerized polypropylene resin with high-temperature resistance is used for the supporting layer; and conventional homopolymerized polypropylene resin is used for the corona layer. The inside of the cast polypropylene film with the cohesive stripping function can be stripped by a cohesive stripping mode; moreover, stripping force is moderate; and when the cast polypropylene film with the cohesive stripping function is uncovered, the hand feeling is smooth, no obstruction feeling exists, and the phenomena of fuzzing, burring and the like do not occur.
Description
Technical field
The utility model belongs to the packaging material for food technical field, is specifically related to a kind of interior poly-cast polypropylene film of function and preparation method thereof of peeling off that has.
Background technology
At present, easily take off epiphragma and be mainly used in processed food packaging fields such as jelly, sour milk, pudding, the epiphragma of these food mainly is normal temperature or cryogenic product.Development along with society, the raising of people's living standard, instant food popular, easily take off epiphragma and begin progressively to be applied to high temperature sterilization product such as products such as can, congee class, and its glass bottle and jar and can begin to replace with polypropylene cup material, and above-mentioned epiphragma can not stand 121 ℃ high temperature sterilization, after standing the high-temperature sterilization process, epiphragma can come off automatically, peel off, and it is peeled off mode and belongs to interface peel, the size of peeling force (heat seal strength) when being sealed condition effect bigger, heat-sealing window relative narrower.Consider that epiphragma needs high temperature sterilization, it peels off mode should adopt the interior poly-mode of peeling off, because interior poly-stripping damage is the hot sealing layer of self, the preparation technology of its hot sealing layer film has relatively high expectations, usually adopting the coated heat sealing adhesive process to be about to have the heat-seal adhesive of easily peeling off character is coated with and the epiphragma heat cover, make it have easy fissility, current only have external a few family large-scale multination enterprise to develop the hot sealing layer that fire resistant polypropylene cup material is easily taken off epiphragma with the coated heat sealing adhesive process, and domestic manufacturer unable production hot sealing layer film mainly depends on external import.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of interior poly-cast polypropylene film of peeling off function that has is provided, this cast polypropylene film can with the interior poly-mode of peeling off within it portion peel off, and peeling force is moderate, feel does not smoothly have the pause and transition in rhythm or melody sense when opening, phenomenons such as no wire drawing, band burr.
Technical problem to be solved in the utility model is achieved through the following technical solutions:
A kind of have in the poly-cast polypropylene film of peeling off function, produce with coextrusion process by hot sealing layer, supporting layer, corona layer.
Described hot sealing layer is a base material with high temperature resistant homo-polypropylene, and incompatible phase polyethylene or ethylene-vinyl acetate copolymer are evenly dispersed in the base material with the form of " isolated island ".The layer thickness ratio of described hot sealing layer, supporting layer, corona layer is 0.5 ~ 1.5:2.5 ~ 3.5:0.5 ~ 1.5.
The utility model is a kind of have in poly-peeling off of cast polypropylene film of peeling off function occur in the hot sealing layer, owing to there are two kinds of different phases in the material of peeling off, phase and phase is directly incompatible, the contact and the containment relationship that just have the physics aspect, contact surface in two-phase has just produced the interface like this, externally peel off at two alternate interfaces under the effect of pulling force, thereby realize the effect of peeling off easily take off, and its principle is the interior poly-principle of peeling off.
The beneficial effect of the utility model is a kind of in the having poly-cast polypropylene film of peeling off function is as follows:
(1) the utility model is a kind of have in the poly-cast polypropylene film of peeling off function, its hot sealing layer is a base material with high temperature resistant homo-polypropylene, incompatible phase polyethylene or ethylene-vinyl acetate copolymer are evenly dispersed in the base material with the form of " isolated island ", make this cast polypropylene film can with the interior poly-mode of peeling off within it portion peel off, and peeling force is moderate, feel does not smoothly have the pause and transition in rhythm or melody sense when opening, phenomenons such as no wire drawing, band burr.
(2) the utlity model has the interior poly-corona surface surface corona value 〉=38dyn/cm that peels off the cast polypropylene CPP film of function, make corona surface be easy to beat compound other film of corona; Surface friction coefficient is walked machine 0.1 ~ 0.3 when being easy to produce.
(3) the utility model is a kind of have in the poly-material of peeling off the cast polypropylene film of function can tolerate 131 ℃ * 45 minutes high temperature, can be used as high temperature resistant hot sealing layer film and the heat-sealing of polypropylene cup material of easily taking off epiphragma, make that high temperature resistant easily to take off the epiphragma heat seal strength moderate, be easy to peel off, seal firmly.
(4) of the present utility model have in the poly-cast polypropylene film of peeling off function, it combines with polypropylene cup material as the hot sealing layer film and is applied to high temperature resistant epiphragma product such as can class, congee class, greatly reduces packing cost, has the very high market competitiveness.
Description of drawings
Fig. 1 is a poly-structural representation of peeling off the cast polypropylene film of function in embodiment 1 has.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiments, to the utility model proposes a kind of have in poly-cast polypropylene film and the preparation method who peels off function be described in detail as follows:
Embodiment 1
A kind of have in the poly-cast polypropylene film of peeling off function, as shown in Figure 1, go out cast polypropylene film (CPP) for three-layer co-extruded, 63 be hot sealing layer, 62 be supporting layer, 61 is the corona layer, it is 1:3:1 that its layer thickness compares, gross thickness is 70 μ m.
Wherein hot sealing layer is high temperature resistant atactic copolymerized polypropene, and it is a base material with high temperature resistant homo-polypropylene, contains incompatible phase polyethylene (PE) simultaneously, and incompatible form with " isolated island " is distributed in the base material.
After testing, above-mentioned have the interior poly-cast polypropylene film surface friction coefficient of peeling off function about 0.3, corona surface surface corona value 〉=38dyn/cm.
Embodiment 2
A kind of have in the poly-cast polypropylene film of peeling off function, go out cast polypropylene film for three-layer co-extruded, be respectively hot sealing layer, supporting layer and corona layer, its layer thickness is than being 0.8:2.8:1.2, gross thickness is 70 μ m.Hot sealing layer is high temperature resistant atactic copolymerized polypropene, and it is a base material with high temperature resistant homo-polypropylene, contains 3% incompatible phase ethylene-vinyl acetate copolymer (EVA) simultaneously, and incompatible form with " isolated island " is distributed in the base material.
Supporting layer is high temperature resistant homo-polypropylene resin.The corona layer is common homo-polypropylene resin.
After testing, present embodiment has the interior surface friction coefficient that gathers the cast polypropylene CPP film of peeling off function about 0.2, corona surface surface corona value 〉=38dyn/cm.
Above-mentioned only is preferred embodiments of the present utility model; be not that the utility model is done any pro forma restriction; do not breaking away within the technical solutions of the utility model scope; any technology contents that utilizes above-mentioned announcement is made the scheme of the equivalent variations of a little change or modification; all belong in the technical solution of the utility model scope, therefore protection domain of the present utility model should be as the criterion with appended claim.
Claims (2)
1. one kind has the interior poly-cast polypropylene film of peeling off function, and it is characterized in that: the poly-cast polypropylene film of peeling off function was produced with coextrusion process by hot sealing layer, supporting layer, corona layer in this had.
2. a kind of interior poly-cast polypropylene film of peeling off function that has according to claim 1, it is characterized in that: the layer thickness ratio of described hot sealing layer, supporting layer, corona layer is 0.5～1.5:2.5～3.5:0.5～1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206662510U CN201932498U (en) | 2010-12-17 | 2010-12-17 | Cast polypropylene film with cohesive stripping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206662510U CN201932498U (en) | 2010-12-17 | 2010-12-17 | Cast polypropylene film with cohesive stripping function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201932498U true CN201932498U (en) | 2011-08-17 |
Family
ID=44444031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206662510U Expired - Lifetime CN201932498U (en) | 2010-12-17 | 2010-12-17 | Cast polypropylene film with cohesive stripping function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201932498U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152565A (en) * | 2010-12-17 | 2011-08-17 | 惠州宝柏包装有限公司 | Current polypropylene film with cohesive peeling function and preparation method thereof |
| CN102700209A (en) * | 2012-05-15 | 2012-10-03 | 杭州洁能塑料包装有限公司 | Film with high heat-seal intensity |
| CN110352128A (en) * | 2016-12-16 | 2019-10-18 | 安姆科软包装温特伯恩有限公司 | Polymer film and the packaging being generated by it |
-
2010
- 2010-12-17 CN CN2010206662510U patent/CN201932498U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152565A (en) * | 2010-12-17 | 2011-08-17 | 惠州宝柏包装有限公司 | Current polypropylene film with cohesive peeling function and preparation method thereof |
| CN102152565B (en) * | 2010-12-17 | 2013-07-03 | 惠州宝柏包装有限公司 | Current polypropylene film with cohesive peeling function and preparation method thereof |
| CN102700209A (en) * | 2012-05-15 | 2012-10-03 | 杭州洁能塑料包装有限公司 | Film with high heat-seal intensity |
| CN110352128A (en) * | 2016-12-16 | 2019-10-18 | 安姆科软包装温特伯恩有限公司 | Polymer film and the packaging being generated by it |
| US11820110B2 (en) | 2016-12-16 | 2023-11-21 | Amcor Flexibles Winterbourne Limited | Polymeric films and packages produced therefrom |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110817 |
|
| CX01 | Expiry of patent term |