Highly transparent polyethylene shrink film and film blowing technology thereof

A polyethylene and shrink film technology, used in layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve problems such as insufficient transparency, and achieve stable film blowing process conditions, accurate temperature control, and low temperature. molding effect

Active Publication Date: 2014-12-03
ZHENGXIN PACKAGING CO LTD DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The surface of the polyethylene shrink film produced by the prior art is blurred or whitish, and when it needs to be printed on the polyethylene shrink film, the effect is not bright enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-transparency polyethylene shrink film, the high-transparency polyethylene shrink film is composed of three layers of film, namely an outer layer, a middle layer and an inner layer;

[0030] The outer layer is composed of 0%~20% by weight of LDPE, 79%~99% of MPE, and 1%~5% of nucleating agent, the melt index of the outer layer LDPE is ≥ 2g / 10min, and the Melt index ≥ 1g / 10min;

[0031] The middle layer is composed of 60%~80% by weight of MDPE, 10%~20% of LDPE, and 10%~20% of HDPE. The melt index of MDPE of the middle layer is ≤0.5g / 10min, and the Melt index≤0.5g / 10min, density of HDPE≥0.960 g / cm 3 ; The raw material composition of the inner layer is the same as that of the outer layer.

[0032] Wherein, the ratio of the thickness of the outer layer: the thickness of the middle layer: the thickness of the inner layer is 1:3:1.

[0033] Wherein, the Vicat softening point temperature of the high-transparency polyethylene shrink film is 105°C.

[0034] A film blow...

Embodiment 2

[0039] A high-transparency polyethylene shrink film, the high-transparency polyethylene shrink film is composed of three layers of film, namely an outer layer, a middle layer and an inner layer;

[0040] The outer layer is composed of 8% LDPE, 89% MPE, and 3% nucleating agent by weight percentage; the middle layer is composed of 70% MDPE, 15% LDPE, and 15% HDPE by weight percentage; The raw material composition of the inner layer is the same as that of the outer layer.

[0041] Described nucleating agent is the nucleating agent of TM3 (replacing dibenzylidene sorbitol) by 1% of the nucleating agent of the trade mark 3988 of American milliken company, 1% of Shanxi Chemical Research Institute, 1% of Shanxi Chemical Research Institute The brand name is composed of nucleating agent Y5988. Wherein, the ratio of the thickness of the outer layer: the thickness of the middle layer: the thickness of the inner layer is 1:4:1. The Vicat softening point temperature of the high-transpare...

Embodiment 3

[0047] A high-transparency polyethylene shrink film, the high-transparency polyethylene shrink film is composed of three layers of film, namely an outer layer, a middle layer and an inner layer;

[0048] The outer layer is composed of 15% by weight of LDPE, 83% of MPE, and 2% of nucleating agent; the middle layer is composed of 65% by weight of MDPE, 18% of LDPE, and 17% of HDPE; The raw material composition of the inner layer is the same as that of the outer layer.

[0049] The nucleating agent is a mixture of 1% of the nucleating agent of the brand 3988 of the American milliken company and 1% of the nucleating agent of the brand of Shanxi Chemical Research Institute of Y5988.

[0050] Wherein, the ratio of the thickness of the outer layer: the thickness of the middle layer: the thickness of the inner layer is 1:3:1. The Vicat softening point temperature of the high-transparency polyethylene shrink film is 105°C.

[0051] A film blowing process of a high-transparency polyet...

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Abstract

The invention relates to the technical field of shrink films, in particular to a highly transparent polyethylene shrink film and a film blowing technology. The highly transparent polyethylene shrink film consists of three films, namely an outer layer, a middle layer and an inner layer; the outer layer comprises 0%-20% of LDPF, 79%-99% of MPE, and 1%-5% of a nucleating agent in percentage by weight; the melt index of LDPE in the outer layer is greater than or equal to 2g/10min, and the melt index of MPE is greater than or equal to 1g/10min; the middle layer comprises 60%-80% of MDPE, 10%-20% of LDPE and 10%-20% of HDPE in percentage by weight; the melt index of MDPE in the middle layer is smaller than or equal to 0.5g/10min, the melt index of LDPE is smaller than or equal to 0.5g/10min, and the density of HDPE is greater than or equal to 0.960g/cm<3>; and the composition of the raw material of the inner layer and the composition of the raw material of the outer layer are the same. The highly transparent polyethylene shrink film has the haze of 7%, the light transmittance of greater than or equal to 92%, and the glossiness of 75%, so that the haze is good, the glossiness is good, and a printed pattern is more attractive and clearer when the highly transparent polyethylene shrink film is used for printing. The film blowing technology is stable in condition, precise in temperature and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of shrink film, in particular to a high-transparency polyethylene shrink film and its blown film process. Background technique [0002] Shrink film is mainly used for sales and transportation of various products, and its main function is to stabilize, cover and protect products, so shrink film must have high puncture resistance, good shrinkage and shrinkage stress. The initial shrink film was mainly PVC. With the continuous improvement of the performance requirements of shrink film, PVC shrink film gradually decreased, while various polyethylene shrink films developed rapidly. Polyethylene shrink film is a kind of material with good toughness. It is widely used in the packaging of alcohol, cans, mineral water, various beverages, cloth and other products. The product has good flexibility, impact resistance, and Strong tear resistance, not easy to break, not afraid of moisture, large shrinkage. [0003] The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B29C55/28B29C47/60B29C47/92B29C48/92
Inventor 黄镇荣黄卫东林城罗振华黄晓纯全明德
Owner ZHENGXIN PACKAGING CO LTD DONGGUAN
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