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Highly-smooth polyethylene film and manufacturing method thereof

A polyethylene film, polyethylene technology, applied in chemical instruments and methods, flexible coverings, packaging, etc., can solve the problems of large differences in friction coefficient, affecting packaging production, uneven precipitation, etc., to achieve uniform distribution and Effect of stable, high slip friction coefficient

Inactive Publication Date: 2012-09-19
浙江粤海包装新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Though this invention can reduce the coefficient of friction of film, because erucamide or its substituent are low-molecular-weight inorganic substances, its slippery effect is determined by the migration of slippery agent molecules to the film surface. In the process of packaging production, the amount of slipping agent deposited inside and outside the film roll will be uneven, resulting in a large difference in friction coefficient, which will affect normal packaging production

Method used

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  • Highly-smooth polyethylene film and manufacturing method thereof
  • Highly-smooth polyethylene film and manufacturing method thereof
  • Highly-smooth polyethylene film and manufacturing method thereof

Examples

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preparation example Construction

[0012] The preparation method of the high-slip polyethylene film is as follows: low-density polyethylene and linear low-density polyethylene with a mass ratio of 10:90 to 90:10 are used as the outer layer, and low-density polyethylene with a mass ratio of 10:90 to 90:10 is used as the outer layer. Density polyethylene and linear low-density polyethylene are used as the middle layer, and low-density polyethylene, linear low-density polyethylene and silicone slippery anti-sticking agent are used as the inner layer with a weight ratio of 50:50:0.5 to 50:50:10. They are respectively mixed by a quantitative batching device, put into an extruder for plasticizing and extruding, extruded through a three-layer co-extruded die, and rolled up after inflation to obtain a high-smooth polyethylene film.

[0013] The present invention uses multi-layer co-extrusion blow molding equipment and process, including the following processes: material mixing process, feeding process, plasticizing extr...

Embodiment 1

[0015] Get low-density polyethylene and linear low-density polyethylene for outer layer, and the mass ratio is: 50%:50%;

[0016] Get the low-density polyethylene and linear low-density polyethylene used in the middle layer, and the mass ratio is: 50%:50%;

[0017] Get low-density polyethylene, linear low-density polyethylene and organosilicon slippery anti-sticking agent that inner layer is used, and weight ratio is: 50%:50%:4%;

[0018] The thickness ratio of the outer layer, the middle layer, and the inner layer is: 1:2:1; the thickness of the film is 70 microns.

[0019] The above proportioned materials are processed by multi-layer co-extrusion blow molding equipment and technology, including the following processes: mixing process, feeding process, plasticizing extrusion process, inflation traction process, air ring cooling process, herringbone splint process, Traction roller traction process, corona treatment process, film winding process.

[0020] The friction coeffic...

Embodiment 2

[0023] Get low-density polyethylene and linear low-density polyethylene for outer layer, and the mass ratio is: 10%:90%;

[0024] Get the low-density polyethylene and linear low-density polyethylene used in the middle layer, and the mass ratio is: 90%:10%;

[0025] Get low-density polyethylene, linear low-density polyethylene, metallocene linear low-density polyethylene and organosilicon slippery anti-sticking agent for inner layer, and the weight ratio is: 50%:50%:2%;

[0026] The thickness ratio of the outer layer, middle layer and inner layer is 1:1:1; the film thickness is 20 microns.

[0027] The above proportioned materials are processed by multi-layer co-extrusion blow molding equipment and technology, including the following processes: mixing process, feeding process, plasticizing extrusion process, inflation traction process, air ring cooling process, herringbone splint process, Traction roller traction process, corona treatment process, film winding process.

[002...

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Abstract

The invention discloses a highly-smooth polyethylene film and a manufacturing method thereof. The highly-smooth polyethylene film comprises an outer layer, a middle layer and an inner layer. The outer layer is made of, by weight ratio, 10:90-90:10 of low-density polyethylene and linear low-density polyethylene. The middle layer is made of, by weight ratio, 10:90-90:10 of low-density polyethylene and linear low-density polyethylene. The inner layer is made of, by weight ratio, 50:50:0.5-50:50:10 of low-density polyethylene, linear low-density polyethylene and anti-plastering agents. The manufacturing method includes mixing the outer layer, the middle layer and the inner layer by a quantitative batcher, adding the layers to an extruder to be subjected to plastifying extrusion, extruding the layers into film tubes by triple coextrusion die heads, and wrapping up the layers after the layers are blown up. Compared with the prior art, the highly-smooth polyethylene film is more precise and stable in friction coefficient and well solves the problems of slipping of composite films on a package machine and slipping agent precipitation.

Description

technical field [0001] The invention relates to a flexible packaging film and a preparation method thereof, in particular to a high smooth polyethylene film and a preparation method thereof. Background technique [0002] As a flexible packaging composite material, polyethylene film is mainly used as the heat-sealing layer of the composite film. It has the advantages of soft texture, low density, easy sealing, low cost, and easy processing and molding, so it is widely used. At present, when many flexible packaging composite film manufacturers use the roll film material with polyethylene film as the heat-sealing layer, the inner layer of the film roll is often due to long-term storage and improper winding of the roll film. The composition of the agent is seriously separated, resulting in uneven friction coefficient of the composite film inside and outside the composite film roll, and the composite film is prone to slipping on the packaging machine, affecting normal production ...

Claims

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Application Information

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IPC IPC(8): B32B27/06B32B27/18B32B27/32B65D65/40B29C55/28
Inventor 王猛
Owner 浙江粤海包装新材料有限公司
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