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Ultra-low-thickness polyethylene (PE) film and preparation method thereof

An ultra-low-density, thin-film technology, applied in the field of plastic films, can solve the problems of film strength, physical and chemical properties of barrier properties, increase of production costs and waste of energy, film processing is not smooth, etc., to achieve sensitivity to ambient temperature and humidity Low cost, easy operation, high yield effect

Active Publication Date: 2019-04-02
XIAMEN AMESON NEW MATERIAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is used for air cushion cushioning in the market (the main structure of the air cushion film is to block the gas between the upper and lower films by using the barrier properties of the film to form an air cushion knot, which can cushion the bumps and impacts of the product during transportation and effectively protect the product. The thickness of the film material of packaging) is generally more than 15 μm. The film of this thickness will not only increase the production cost of the product and waste energy, but also increase the pollution to the environment.
[0004] In addition, in order to make the film have gas barrier properties, in the prior art, barrier components such as PA and EVOH are introduced into the raw materials for film preparation, but the addition of the above components often causes problems such as compatibility between the raw materials, so that the resulting The processing of the film is not smooth, especially in the process of preparing low-thickness films, there are often problems such as film breakage, which seriously affects the production efficiency
At the same time, it will also lead to the decrease of physical and chemical properties such as strength and barrier properties of the film, which will affect its application.

Method used

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  • Ultra-low-thickness polyethylene (PE) film and preparation method thereof
  • Ultra-low-thickness polyethylene (PE) film and preparation method thereof
  • Ultra-low-thickness polyethylene (PE) film and preparation method thereof

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preparation example Construction

[0043] The LLDPE in the modified ultra-low density LLDPE in the present invention is the same as the LLDPE in the outer layer. The preparation method of described modified ultra-low density LLDPE comprises the steps:

[0044] 1-10 parts by weight of maleic anhydride, 0.5-1% by weight of cumene peroxide, 1-2% of antioxidant and 100 parts of LLDPE plastic rice are blended through a high-speed mixing and stirring tank, and added to a twin-screw extruder. The modified ultra-low density LLDPE is obtained by melt grafting in the machine and sheared and granulated. The temperature settings of each section are as follows: Zone 1: 190-200°C, Zone 2: 210-220°C; Zone 3: 220-230°C, Zone 4: 220-230°C, Zone 5: 220-230°C, Zone 6: 220-230°C, head area: 190-200°C.

[0045] In some preferred embodiments, the raw materials for preparing the inner layer include LLDPE70-80, modified ultra-low density LLDPE 20-30, blocking agent 3-4, and PPA rheology agent 1-3 in parts by weight.

[0046] The LL...

Embodiment 1

[0070] Embodiment 1 provides a kind of ultra-low thickness PE film, and described ultra-low thickness PE film is made up of outer layer, middle layer and inner layer, and its weight ratio is 30:25:30; The preparation raw material of described outer layer, with In parts by weight, it includes high-density polyethylene (HDPE) 70, linear low-density polyethylene (LLDPE) 10, opening agent 3, and PPA rheological agent 1; the raw materials for the preparation of the middle layer include HDPE 70, LLDPE 10, EVOH modified polypropylene 5, PPA rheological agent 1; the preparation raw materials of the inner layer, in parts by weight, include LLDPE 70, modified ultra-low density LLDPE 20, blocking agent 3, PPA rheological agent 1 .

[0071] Described HDPE is purchased from Lotte Chemical trade mark and is 8300B product (melt index is 0.02g / 10min; Density is 0.95g / cm 3 ); said LLDPE purchased from Canada NOVA brand is GX-4010P product (melt index is 0.2g / 10min; density is 0.918g / cm 3 ); ...

Embodiment 2

[0082] Embodiment 2 provides a kind of ultra-low thickness PE film, and described ultra-low thickness PE film is made up of outer layer, middle layer and inner layer, and its weight ratio is 40:35:40; The preparation raw material of described outer layer, with In parts by weight, it includes high-density polyethylene (HDPE) 90, linear low-density polyethylene (LLDPE) 30, opening agent 5, and PPA rheology agent 2; the raw materials for the preparation of the middle layer include HDPE 90, LLDPE 30, EVOH modified polypropylene 15, PPA rheological agent 2; the preparation raw materials of the inner layer, in parts by weight, include LLDPE 80, modified ultra-low density LLDPE 30, blocking agent 4, PPA rheological agent 3 .

[0083] Described HDPE is purchased from Lotte Chemical trade mark and is 7700F product (melt index is 0.07g / 10min; Density is 0.955g / cm 3 ); said LLDPE purchased from Exxon Mobil is LL3105.50 product (melt index is 0.5g / 10min; density is 0.921g / cm 3 ); the an...

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Abstract

The invention relates to the field of plastic films, and particularly relates to an ultra-low-thickness polyethylene (PE) film and a preparation method thereof. The ultra-low-thickness PE film is composed of an outer layer, a middle layer and an inner layer, wherein a preparation raw material of the middle layer comprises modified polypropylene, and the modified polypropylene is one or more selected from ethylene-vinyl alcohol (EVOH) modified polypropylene, nylon modified polypropylene and polyvinylidene chloride (PVDC) modified polypropylene.

Description

technical field [0001] The invention relates to the field of plastic films, in particular to an ultra-low thickness PE film and a preparation method thereof. Background technique [0002] Nowadays, plastic film products have been widely used in all walks of life in human society, and film products are mainly made of HDPE and LDPE. PE film is the most commonly used polymer film and is a necessity in daily life, but most of the products are disposable, and they are thrown away immediately after use. [0003] With the improvement of environmental awareness and the control of material costs, packaging films are gradually shifting towards lightweight and reduction. Currently used in the market for air cushion cushioning (the main structure of the air cushion film is to block the gas between the upper and lower films by using the barrier properties of the film to form an air cushion knot, which can cushion the bumps and impacts of the product during transportation and effectively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/30B32B7/02B32B27/20B32B33/00B29D7/01
CPCB29D7/01B32B7/02B32B27/08B32B27/20B32B27/30B32B27/32B32B2307/558B32B2307/582B32B2307/7242
Inventor 涂宗铃陈赐辉
Owner XIAMEN AMESON NEW MATERIAL INC
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