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Paper plastic glue-free composite off line repeated spraying bidirectional stretching polypropylene film

A polypropylene film, biaxial stretching technology, applied in the direction of synthetic resin layered products, coatings, layered products, etc., can solve the problems of difficulty, difficulty in production and reproduction, and the composition of the film layer and its preparation method are not disclosed.

Active Publication Date: 2009-10-14
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 off line repeated spraying bidirectional stretching polypropylene film
  • Paper plastic glue-free composite off line repeated spraying bidirectional stretching polypropylene film
  • Paper plastic glue-free composite off line repeated spraying bidirectional stretching polypropylene film

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 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%.

[0030] The base film is biaxially oriented polypropylene matting film, which is a three-layer co-extruded structure.

[0031] 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.

[0032] 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 trea...

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 a biaxially oriented polypropylene light film with 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 manufactu...

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 a biaxially oriented polypropylene light film with 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 invention discloses an off-line lamination biaxially stretched polypropylene film for paper-plastic glue-free lamination and a preparation method thereof. A functional layer that can be directly laminated with paper, pre-printed paper, or another film containing this layer to the upper surface layer; an upper surface layer can be provided between the upper surface layer and the core layer, and between the core layer and the lower surface layer A subsurface may be provided. The preparation method of the film of the present invention is: the base film is composed of an upper surface layer, a core layer, and a lower surface layer or is composed of an upper surface layer, an upper surface layer, a core layer, a lower surface layer, and a lower surface layer; It is made by stretching method; the functional layer is processed into a functional melt according to the prescribed ingredients, and the functional melt is poured onto the upper surface by an off-line coating equipment to obtain a finished product. The invention can realize the glue-free composite of paper and plastic, and also has the advantages of simple structure, high heat-sealing strength and high peeling strength, which is beneficial to the manufacture and popularization of products.

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] 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 main method is two-time stretching, that is, first longitudinal stretching and then transverse stretching; this patent belongs to the showering method in the secondary processing method of biaxially stretched polypropylene film. [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 will emit more toxic solvents or volatiles, which will pollute the environment The second is the...

Claims

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Application Information

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Patent Type & Authority Patents(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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