Paper plastic glue-free composite bidirectional stretching polypropylene film and preparation method thereof

A polypropylene film, biaxially stretched technology, applied in the direction of chemical instruments and methods, applications, household appliances, etc., can solve the problems of difficulty, undisclosed film layer composition and its preparation method, difficult production and reproduction, etc., to achieve heat sealing Strong, conducive to manufacturing and promotion, and energy-saving effects

Active Publication Date: 2009-09-02
GUANGDONG DECRO PACKAGE FILMS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent discloses a paper-plastic glue-free composite structure, it does not disclose the specific composition of the film layer and its preparation method. In actual use, it is difficult for people to carry out accurate production reproduction. In the field of paper-plastic composite technology There are certain difficulties in the promotion and application of

Method used

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  • Paper plastic glue-free composite bidirectional stretching polypropylene film and preparation method thereof
  • Paper plastic glue-free composite bidirectional stretching polypropylene film and preparation method thereof
  • Paper plastic glue-free composite bidirectional stretching polypropylene film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The composition of functional layer 1 is: 70% ethylene-butene copolymer, maleic anhydride graft modified product of 30% ethylene-butene copolymer, wherein, the content of butene in the ethylene-butene copolymer is 30%, and the graft ratio of the maleic anhydride graft modified product of ethylene-butene copolymer is 0.5%.

[0038] The composition of the core layer 3 is: 99.75% isotactic polypropylene (97% isotacticity, 3 g / 10 minutes melt index), 2500 ppm glyceryl monostearate;

[0039] The composition of the surface layer 5 is: a blend of high-density polyethylene (melt index is 0.05 g / 10 minutes) and ethylene-propylene copolymer (melt index is 7 g / 10 minutes) that accounts for 99.2% of the surface layer according to the configuration of 9:11 substances, 8000ppm antioxidant 1010.

[0040] The total thickness of the prepared product is 20 μm, the thickness of the functional layer 1 is 6 μm, and the functional layer 1 accounts for 30% of the total weight of the film.

...

Embodiment 2

[0052] The composition of functional layer 1 is: 50% ethylene-butene copolymer, 20% maleic anhydride graft modification of ethylene-butene copolymer, 30% P-125, wherein ethylene-butene copolymer The content of butene in the product is 10%, and the graft ratio of the maleic anhydride graft modified product of ethylene-butene copolymer is 2%.

[0053] The ingredients of the next surface layer 2 and the last surface layer 4 are: 99.8% isotactic polypropylene (96% isotacticity, 2.5 grams / 10 minutes melt index), 2000ppm glyceryl monostearate;

[0054] The composition of core layer 3 is: the isotactic polypropylene of 99.7% (isotacticity is 96%, melt index is 2.5 grams / 10 minutes), the glyceryl monostearate of 2000ppm, the methylenebisstearamide of 1000ppm ;

[0055] The composition of surface layer 5 is: the isotactic polypropylene of 99.8% (isotacticity is 96%, and melt index is 3 grams / 10 minutes), 2000ppm silicon dioxide (SiO 2 ).

[0056] The total thickness of the prepared ...

Embodiment 3

[0074] The composition of functional layer 1 is: 80% ethylene-octene copolymer, 19% maleic anhydride graft modification of ethylene-butene copolymer, 1% P-125, in which ethylene-octene copolymer The content of octene in the product is 20%, and the graft ratio of the maleic anhydride graft modified product of ethylene-butene copolymer is 1%.

[0075] The ingredients of the next surface layer 2 and the last surface layer 4 are: 99.8% isotactic polypropylene (95% isotacticity, 2 grams / 10 minutes melt index), 2000ppm glyceryl monostearate;

[0076] The composition of the core layer 3 is: 99.75% isotactic polypropylene (95% isotacticity, 2 g / 10 minutes melt index), 2000 ppm glyceryl monostearate, 500 ppm erucamide;

[0077] The composition of surface layer 5 is: the isotactic polypropylene of 99.8% (isotacticity is 96%, and melt index is 3 grams / 10 minutes), 2000ppm silicon dioxide (SiO 2 ).

[0078] The total thickness of the prepared product is 18 μm, the thickness of the funct...

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Abstract

The invention discloses a biaxially stretched polypropylene film for paper-plastic composite without glue and a preparation method thereof. Material, pre-printed paper material or another film heat-compressed functional layer containing this layer, the upper surface layer is provided between the surface layer and the core layer, and the next surface layer is provided between the core layer and the functional layer. The preparation method of the present invention is: feeding the selected raw materials into the extruder to be plasticized into a melt, the melt is transported through a pipeline, filtered through a filter, distributed to a die head for co-extrusion through a flow channel, and then can be respectively processed according to the flat film method Or processed into a film by the bubble tube method, the film is corona treated or flame treated into a master roll, the master roll is subjected to aging treatment, and finally cut into film products. The biaxially stretched polypropylene film of the present invention can realize glue-free compounding of paper and plastic, save energy, and is environmentally friendly and hygienic. At the same time, the product also has the advantages of high heat-sealing strength and high peeling strength, which is beneficial to manufacture and promotion.

Description

technical field [0001] The invention relates to a biaxially stretched polypropylene film for paper-plastic glue-free compounding and a preparation method thereof. Background technique [0002] Common biaxially stretched polypropylene film production processes include flat film method and bubble tube method, especially the flat film method, and the flat film method is divided into two types: stepwise biaxial stretching and synchronous biaxial stretching. The two stretches are mainly stretched longitudinally and then transversely. [0003] At present, there are mainly the following methods for paper-plastic compounding in industry: one is the glue method (dry compounding and wet compounding), but this method emits more toxic solvents or volatiles and pollutes the environment; The second is the solvent-free composite method, and the initial adhesion of the composite product obtained by this method is extremely low; the third is the pre-coating method, but although this method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/20B32B27/30B32B27/28B32B7/10B29C69/02B29C55/14B29D7/01
Inventor 徐文树朱健民邹晓明罗启扬
Owner GUANGDONG DECRO PACKAGE FILMS
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