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Method for preparing blown film by utilizing low-density polyethylene

A low-density polyethylene and film preparation technology, which is applied in the field of film preparation technology, can solve the problems of low qualified rate of cost products, low film strength, poor optical performance, etc., and achieves improved film qualification rate, good optical performance, and reduced production costs. Effect

Inactive Publication Date: 2018-04-20
SHAANXI SHENGMAI PETROLEUM
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Problems solved by technology

[0002] With the rapid advancement of science and technology, more and more new materials are applied to our lives. With the emergence of new products, many processes have also been updated. Films prepared by traditional preparation processes tend to produce weaker films. Low, low haze, poor optical performance, low pass rate of cost products produced

Method used

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Embodiment Construction

[0012] A method for preparing a blown film using low-density polyethylene, which is characterized in that it includes: placing the low-density polyethylene in a blown film machine for hot melting, preparing the film and performing cooling treatment; wherein the blown film processing temperature of the film is 160~190 ℃; the inflation ratio is set at 2.8~3.3; the film thickness is set at 29~31μm.

[0013] A method for preparing blown film using low-density polyethylene according to the present invention, the film blowing unit is a BLU300 film blowing unit. The pulling speed of the film blowing unit is 5m / min. The low-density polyethylene adopts PE-LD 2426. The cooling treatment method adopts air ring cooling. The blown film temperature is 170°C. When the melt temperature is lower than 160°C, the surface of the film will be bloomed, cloud-like plaques, and "fish eyes" will be formed. This is because the melt temperature is too low and the resin cannot be fully mixed and plast...

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Abstract

The invention discloses a method for preparing blown film by using low-density polyethylene, which belongs to the field of film preparation technology. It is characterized in that it includes: placing the low-density polyethylene in a film blowing machine for hot melting, preparing the film and performing cooling treatment. Through the improvement of the preparation process, the qualification rate of the film is effectively improved, so that it has better processing performance in the process of blown film, can reduce energy consumption, and the blown film has low haze and good optical properties. The production process is stable, with high transverse tensile strength, impact strength and good transparency, and under this inflation ratio, the processing temperature has little effect on the film properties, which reduces energy consumption and production costs. Wide promotion space.

Description

technical field [0001] The invention belongs to the field of film preparation technology, and in particular relates to a method for preparing blown film by utilizing low-density polyethylene. Background technique [0002] With the rapid advancement of science and technology, more and more new materials are applied to our lives. With the emergence of new products, many processes have also been updated. Films prepared by traditional preparation processes tend to produce weaker films. Low, low haze, poor optical performance, and the qualified rate of the produced cost products is low. Contents of the invention [0003] The present invention aims to solve the above problems, and provides a method for preparing blown film from low-density polyethylene. [0004] A method for preparing a blown film using low-density polyethylene, which is characterized in that it includes: placing the low-density polyethylene in a blown film machine for hot melting, preparing the film and perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/28B29K23/00
CPCB29C55/28B29K2023/0633
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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