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Seven-layer co-extruded film used for hot melting combination and preparation method

A co-extruded film and hot-melt technology, applied in chemical instruments and methods, synthetic resin layered products, applications, etc., can solve the problems of high unwinding noise level, difficult unwinding, etc., and achieve high strength and excellent heat sealing performance , high-strength effect

Inactive Publication Date: 2017-05-31
SHANGHAI MAIGAO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, PIB-containing films are often sometimes difficult to unwind efficiently, and more specifically, often have high unwinding noise levels

Method used

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  • Seven-layer co-extruded film used for hot melting combination and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The mass parts array of raw materials is 70 parts of PE, 15 parts of PA, 15 parts of EVOH, and 15 parts of TIE (resin binder);

[0034] Select the corresponding raw material components according to the formula, and extrude from the respective extruder heads after melting respectively, and then enter the different processing channels of the blow molding machine; the air is passed into the blow molding machine to blow the mold blank into a film foam, and lift upwards, cool naturally during the lifting process, after lifting, it is transformed into a seven-layer co-extrusion film through the closing mechanism set above; then it is pulled by the traction roller group, and finally winds up to obtain the finished product; the performance test of the obtained finished product is carried out. The test results are shown in Table 1.

Embodiment 2

[0039] The mass parts of raw materials are 70 parts of PE, 20 parts of PA, 15 parts of EVOH, and 15 parts of TIE (resin binder);

[0040] Select the corresponding raw material components according to the formula, and extrude from the respective extruder heads after melting respectively, and then enter the different processing channels of the blow molding machine; the air is passed into the blow molding machine to blow the mold blank into a film foam, and lift upwards, cool naturally during the lifting process, after lifting, it is transformed into a seven-layer co-extrusion film through the closing mechanism set above; then it is pulled by the traction roller group, and finally winds up to obtain the finished product; the performance test of the obtained finished product is carried out. The test results are shown in Table 1.

Embodiment 3

[0045] The mass parts of raw materials are 80 parts of PE, 15 parts of PA, 15 parts of EVOH, and 15 parts of TIE (resin binder);

[0046] Select the corresponding raw material components according to the formula, and extrude from the respective extruder heads after melting respectively, and then enter the different processing channels of the blow molding machine; the air is passed into the blow molding machine to blow the mold blank into a film foam, and lift upwards, cool naturally during the lifting process, after lifting, it is transformed into a seven-layer co-extrusion film through the closing mechanism set above; then it is pulled by the traction roller group, and finally winds up to obtain the finished product; the performance test of the obtained finished product is carried out. The test results are shown in Table 1.

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Abstract

The invention discloses a production process of a seven-layer co-extruded film used for hot melting combination, and belongs to the technical field of co-extruded films. The film blowing process is adopted, raw materials are subjected to melt extrusion to form die blanks through seven extruder heads and are subjected to huffing and molding, and the seven-layer co-extruded film is prepared by conducting winding after natural cooling. The thin film of a seven-layer structure can be produced through the seven hot melting extruder heads, ratio optimization is conducted according to characteristics of each layer of the film, meanwhile, a blocking layer, a supporting layer and a bonding layer are reasonably distributed, and therefore the final product can have the beneficial effects of being good in barrier property, environment-friendly, free of pollution, low in cost and the like and is suitable for industrialized production. The one important application filed of the seven-layer co-extruded film is the field of filling and sealing of paper-plastic-aluminum composite packages used for liquid, the defect that an existing thin film is likely to overturn is overcome, higher interlaminar peeling strength is achieved, a large number of seven-layer co-extruded films can be applied to packages of liquid milk, juice beverages, alcohol products and drinking water, and market prospects are good.

Description

technical field [0001] The invention discloses a seven-layer co-extruded film production process for hot-melt bonding, and belongs to the technical field of co-extruded films. Background technique [0002] Plastic film is a common daily necessities for people nowadays. Plastic film has the advantages of good transparency, good moisture resistance, excellent heat resistance, convenient use, and low price, and is widely used in various industries. However, the plastic films currently on the market are basically single-layer polyethylene, and the style is relatively simple, which cannot effectively meet the use requirements of some special fields. For example, in some fields, one side of the plastic film is required to be smooth and the other side is rough, which obviously cannot be realized by using the existing production process. The present invention relates to multilayer films suitable for packaging. Such films are used for packaging everything from loose agricultural ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01B32B27/30B32B27/34B32B27/08B32B27/32B32B7/12
CPCB29D7/01B32B7/12B32B27/08B32B27/306B32B27/32B32B27/34
Inventor 不公告发明人
Owner SHANGHAI MAIGAO NEW MATERIAL TECH
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