Paper plastic glue-free composite off line repeated spraying bidirectional stretching polypropylene film and its preparation method

A technology of polypropylene film and biaxial stretching, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, coatings, etc., and can solve the problems of undisclosed film layer composition and its preparation method, difficult production reproduction, difficulty, etc.

Active Publication Date: 2008-03-26
GUANGDONG DECRO PACKAGE FILMS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 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 paper-plastic composite technology It is difficult to promote and apply in the field

Method used

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  • Paper plastic glue-free composite off line repeated spraying bidirectional stretching polypropylene film and its preparation method
  • Paper plastic glue-free composite off line repeated spraying bidirectional stretching polypropylene film and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The composition of functional layer 6 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%.

[0031] The base film is biaxially stretched polypropylene matting film, which is a three-layer co-extruded structure.

[0032] The total thickness of the prepared product is 20 μm, the thickness of the functional layer 6 is 6 μm, and the functional layer 6 accounts for 30% of the total weight of the film.

[0033] The preparation method is as follows: the raw material of the functional layer 6 is coated on the upper surface layer 5 of the base film A through the off-line coating process F (including extrusion, die head and cooling roll), and the lower surface layer 1 at this time is a matte layer. Then the functional surface is subjected to corona t...

Embodiment 2

[0043] The components of functional layer 6 are: 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 1.0%.

[0044] The base film is biaxially stretched polypropylene light film, which is a three-layer co-extruded structure.

[0045] The total thickness of the prepared product is 18 μm, the thickness of the functional layer 6 is 5 μm, and the functional layer 6 accounts for 27.8% of the total weight of the film.

[0046] In the preparation method, other is identical with embodiment 1 except following two:

[0047] 1. The lower surface layer 1 is a transparent layer;

[0048] 2. Off-line lamination extrusion, die head temperature 260°C, cooling roll temperature 30°C; corona treatment power 25w min. / m 2 .

[0049] The properties of the manuf...

Embodiment 3

[0059] Functional layer 6 is 80% ethylene-octene copolymer, 19% maleic anhydride graft modification of ethylene-butene copolymer, 1% P-125, wherein the ethylene-octene copolymer inner octane The ethylene content was 20%, and the graft ratio of the maleic anhydride graft-modified ethylene-butene copolymer was 2%.

[0060] The base film is biaxially stretched polypropylene light film, which is a five-layer co-extrusion structure.

[0061] The total thickness of the prepared product is 18 μm, the thickness of the functional layer 6 is 5.4 μm, and the functional layer 6 accounts for 30% of the total weight of the film.

[0062] In the preparation method, other is identical with embodiment 1 except following two:

[0063] 1. The lower surface layer 1 is a transparent layer;

[0064] 2. Off-line lamination extrusion, die head temperature 220°C, cooling roll temperature 25°C; corona treatment power 35w min. / m 2 .

[0065] The properties of the manufactured products are as follows...

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Abstract

The present invention discloses one kind of biaxially stretched polypropylene film with off-line leached layer for no-adhesive paper-plastic combination and its preparation process. The film includes one base film comprising one or two biaxially stretched upper surface layers, one core layer and one or two biaxially stretched lower surface layers, and one functional film layer for direct combination with paper material. The film is prepared through preparing the base film by means of one co-extruding and biaxially stretching process and compounding functional melt in an off-line film leaching device onto the base film to form the functional film layer. The biaxially stretched polypropylene film with off-line leached layer for no-adhesive paper-plastic combination has simple structure, high heat sealing strength and high stripping strength.

Description

technical field [0001] The invention relates to an off-line lamination biaxially stretched polypropylene film for paper-plastic glue-free lamination and a preparation method thereof. Background technique [0002] 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 will emit more toxic solvents into the atmosphere and seriously pollute the environment; The second is a solvent-free compounding method, and the initial tack of the composite product obtained by this method is extremely low; the third is a pre-coating method, although this method can use no solvent, but there are many processes and increase costs. In addition, the time dependence of the peel strength of the adhesive layer of the composite product obtained by the above method is obvious. Therefore, in order to overcome the shortcomings of paper-plastic composites in the prior art, Chinese patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/20B32B27/30B29C69/02B29C41/24
Inventor 徐文树朱健民
Owner GUANGDONG DECRO PACKAGE FILMS
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