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Current polypropylene film with cohesive peeling function and preparation method thereof

A technology for casting polypropylene and homopolypropylene, applied in chemical instruments and methods, closing, packaging, etc., can solve the problem of high requirements for the preparation of heat-sealing layer films, cover film peeling, peeling, narrow heat-sealing window, etc. problems, to achieve the effect of moderate heat sealing strength, reduced packaging cost, and easy peeling

Active Publication Date: 2011-08-17
安姆科惠州新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of society, the improvement of people's living standards, and the popularity of convenience foods, the easy-to-open lid film has gradually been applied to high-temperature sterilization products such as cans, porridge and other products, and its glass bottles and tinplate cans have begun to use polypropylene cups Instead, the above-mentioned cover film cannot withstand high-temperature sterilization at 121°C. After undergoing high-temperature sterilization, the cover film will automatically fall off and peel off, and the peeling method belongs to interface peeling. The impact is relatively large, and the heat sealing window is relatively narrow
Considering that the cover film needs to be sterilized at high temperature, the peeling method should be cohesive peeling. Since the cohesive peeling damages its own heat-sealing layer, the preparation process of the heat-sealing layer film is relatively high, and coating heat-sealing is usually used. The glue process is about to have easy-peeling heat-sealing glue coating and cover film heat cover, so that it has easy-peeling properties. Currently, only a few large foreign multinational companies have developed high-temperature-resistant polypropylene with the heat-sealing glue coating process. The cup material is easy to remove the heat-seal layer of the lid film, but domestic manufacturers are unable to produce the heat-seal layer film, mainly relying on foreign imports

Method used

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  • Current polypropylene film with cohesive peeling function and preparation method thereof
  • Current polypropylene film with cohesive peeling function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A cast polypropylene film with cohesive release, such as figure 1 As shown, it is a three-layer co-extruded cast polypropylene film (CPP), 63 is a heat-sealing layer, 62 is a support layer, and 61 is a corona layer. The thickness ratio between layers is 1:3:1, and the total thickness is 70 μm. The heat-sealing layer is high-temperature-resistant random copolymerized polypropylene, which is based on 98% high-temperature-resistant homopolypropylene, contains 1% non-compatible polyethylene (PE), and contains 0.7% oleic acid amide smooth agent, 0.2% polyurethane defoamer, 0.1% non-ionic antistatic agent.

[0029] The support layer is high temperature resistant homopolypropylene. The corona layer is conventional homopolypropylene resin.

[0030] The preparation method of the above-mentioned cast polypropylene film with cohesive stripping function is:

[0031] (1) Mixing and drying: Mix the four raw materials of the above-mentioned heat-sealing layer together, stir them w...

Embodiment 2

[0037] A cast polypropylene film with cohesive peeling function is a three-layer co-extruded cast polypropylene film, the outer layer is a heat-sealing layer, the middle is a support layer, and the inner layer is a corona layer. The thickness ratio between layers is The ratio is 1:3:1, and the total thickness is 70μm. The heat-sealing layer is high-temperature-resistant random copolymerized polypropylene, which is based on 95.4% high-temperature-resistant homopolypropylene, and contains 3% incompatible phase ethylene-vinyl acetate copolymer (EVA), and also contains 0.8% Erucamide slip agent, 0.4% polyurethane defoamer, 0.4% non-ionic antistatic agent. The supporting layer is high temperature resistant homopolypropylene resin. The corona layer is ordinary homopolypropylene resin.

[0038] The preparation method of the cast polypropylene film with cohesive peeling function in this embodiment is the same as that in Embodiment 1.

[0039]After testing, the surface friction coef...

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Abstract

The invention belongs to the technical field of food packaging materials and discloses a current polypropylene film with a cohesive peeling function. The current polypropylene film is prepared by a three-layer coextrusion process and consists of a heat sealing layer, a support layer and a corona layer, wherein the heat sealing layer is a high-temperature resistant polypropylene random copolymer layer; high-temperature resistant homopolymer polypropylene is taken as a base material; incompatible polyethylene or ethylene-vinlacetate copolymer is dispersed in the base material in an island mode;an additive is added into the base material at the same time; the support layer is made of high-temperature homopolymer polypropylene resin; and the corona layer is made of conventional homopolymer polypropylene resin. The current polypropylene film with the cohesive peeling function can be used as the heat sealing layer of a composite film used for a high-temperature resistant polypropylene cup material easily-uncovered cover film; and the cover film can be sterilized at the high temperature of 131 DEG C, cannot be layered and damaged after being sterilized, has moderate heat sealing strength and firm seal, and can be uncovered smoothly without rough feeling.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and in particular relates to a cast polypropylene film with cohesive peeling function and a preparation method thereof, which can be used for high-temperature-resistant polypropylene cup material easy-to-open lid film packaging. Background technique [0002] At present, the easy-to-remove lid film is mainly used in the field of processed food packaging such as jelly, yogurt, and pudding, and the lid film of these foods is mainly a normal temperature or low temperature product. With the development of society, the improvement of people's living standards, and the popularity of convenience foods, the easy-to-open lid film has gradually been applied to high-temperature sterilization products such as cans, porridge and other products, and its glass bottles and tinplate cans have begun to use polypropylene cups Instead, the above-mentioned cover film cannot withstand high-temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/16B32B27/06B65D53/08B32B27/18
Inventor 崔晓松高虎黄鹤黎昌虎
Owner 安姆科惠州新材料科技有限公司