Production method of crossed multi-barrier-layer co-extruded film

A production method and technology of barrier layer, applied in the field of preparation of co-extruded film, can solve the problems of uneven thickness of pipe wall, low production efficiency, uneven thickness, etc., and achieve the effect of avoiding wire drawing, improving product performance and optimizing barrier performance.

Inactive Publication Date: 2015-11-18
SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The sheets used in the preparation of hoses and other products are all obtained from cylindrical films prepared by blow molding and extruding tubes. Multi-layer co-extrusion technology is a widely used and mature production method, but this method The prepared cylindrical membrane has the following problems: firstly, the thickness of the membrane is uneven, resulting in uneven thickness of the tube wall of the product, which is prone to defective products; secondly, the diameter of the cylindrical membrane is fixed, and the diameter cannot be adjusted conveniently Sheets of different specifications are prepared; again, its production efficiency is low; finally, the sheets made of this cylindrical film cannot be printed, and labels can only be attached by labeling
It has adverse effects on the production efficiency, production cost and product quality of the product, and cannot meet the material requirements of the sheet

Method used

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  • Production method of crossed multi-barrier-layer co-extruded film
  • Production method of crossed multi-barrier-layer co-extruded film
  • Production method of crossed multi-barrier-layer co-extruded film

Examples

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Effect test

Embodiment 1

[0035] The production method of cross multi-barrier layer co-extruded film adopts figure 1 Production equipment shown, image 3 with Figure 4 For the structure of the air roller used in this embodiment, the concrete production steps of this embodiment are:

[0036] (1) The extruder and the die head extrude the film bubble of the multi-layer co-extrusion film, and the airflow ejected from the 10 air cushion rollers outside the film bubble above the die head supports the floating film bubble; the air cushion roller cools the film bubble, so that The bubble has a certain structural strength, which determines its fixed diameter and bubble thickness; at the same time, the bubble is supported and floated by the air cushion roller, which will not cause friction with the bubble, avoiding the phenomenon of wire drawing on the surface of the bubble, and ensuring the smoothness of the bubble. The best quality; the distance between the two air cushion rollers at the top becomes smaller...

Embodiment 2

[0047] On the basis of Example 1, the preferred embodiment of the present invention is the production method of cross multi-barrier layer co-extruded film, the temperature of the heating nip roll in step (2) is 45°C; the temperature of the heating roll in step (3) is 95°C; the temperature of the cooling roll in step (4) is 20°C.

[0048] The bubble has an 11-layer structure with a barrier layer, and the prepared sheet has a 22-layer structure with doubled layers. The self-adhesive material of the innermost self-adhesive material layer of the bubble is PP. The film thickness of the bubble is 250 μm; the thickness of the intersecting multi-barrier co-extruded film is 500 μm.

[0049] All the other parts are identical to Example 1.

Embodiment 3

[0051] On the basis of Example 1, the preferred embodiment of the present invention is the production method of cross multi-barrier layer co-extruded film, the temperature of the heating nip roll in step (2) is 60°C; the temperature of the heating roll in step (3) is 75°C; the temperature of the cooling roll in step (4) is 5°C.

[0052] The bubble has a 6-layer structure with a barrier layer, and the prepared sheet has a 12-layer structure with doubled layers. The self-adhesive material of the innermost self-adhesive material layer of the bubble is EVA. The film thickness of the bubble is 200 μm; the thickness of the intersecting multi-barrier co-extruded film is 400 μm.

[0053] All the other parts are identical to Example 1.

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Abstract

The invention relates to a production method of a crossed multi-barrier-layer co-extruded film. The production method comprises the following steps: blowing out a film bulb through an extruder and a die head, wherein the innermost layer material of the film bulb is a self-adhesive material, feeding the film bulb into a heating pinch roller, pressing the cylindrical film bulb into a double-layer flaky structure, sticking the double-layer flaky structure into an integral structure through the self-adhesive material after heating the double-layer flaky structure through the heating roller, and then, cooling and rolling so as to obtain the crossed multi-barrier-layer co-extruded film. The thickness of the crossed multi-barrier-layer co-extruded film, namely a sheet material, prepared by the production method is even, and production requirements and quality requirements are met. Surface treatment including gravure, flexographic printing, offset printing, gold stamping and the like can be carried out. A symmetrical structure is formed in each layer, so that barrier layers and functional layers are all doubled, the thickness is doubled, and the sheet material meeting the production requirements is prepared. The doubled barrier layers and functional layers can promote the sheet material to have better barrier performance, and the product performance of the sheet material is improved.

Description

technical field [0001] The invention relates to a preparation method of a co-extruded film, in particular to a production method of a co-extruded film with crossed multi-barrier layers. Background technique [0002] The sheets used in the preparation of hoses and other products are all obtained from cylindrical films prepared by blow molding and extruding tubes. Multi-layer co-extrusion technology is a widely used and mature production method, but this method The prepared cylindrical membrane has the following problems: firstly, the thickness of the membrane is uneven, resulting in uneven thickness of the tube wall of the product, which is prone to defective products; secondly, the diameter of the cylindrical membrane is fixed, and the diameter cannot be adjusted conveniently Sheets of different specifications are prepared; again, its production efficiency is low; finally, the sheets prepared from this cylindrical film cannot be printed, and labels can only be attached by la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01
Inventor 杨伟
Owner SUNRISE PACKAGING MATERIAL JIANGYIN CO LTD
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