A kind of PE thin film and preparation method thereof

A technology of film and mass parts, applied in the field of packaging materials, can solve problems such as poor stiffness and flexibility, poor shelf effect, and affecting the wide application of PE film

Active Publication Date: 2017-06-16
永新股份(黄山)包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing hygienic product packaging film has poor film movement during the automatic packaging process, and the deformation after packaging is large, resulting in poor shelf effect. And the flexibility is poor, so it affects the wide application of PE film in sanitary product packaging film

Method used

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  • A kind of PE thin film and preparation method thereof
  • A kind of PE thin film and preparation method thereof
  • A kind of PE thin film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0039] The application also provides a preparation method of PE film, comprising the following steps:

[0040] Co-extruding the corona layer resin, the middle layer resin and the inner layer resin to obtain a melt film, the melt film includes a corona layer, an intermediate layer and an inner layer stacked in sequence;

[0041] Inflate, cool and shape the melt film, and then corona treat the corona layer to obtain a PE film;

[0042] The corona layer includes 60-80 parts by mass of metallocene linear low-density polyethylene resin and 20-40 parts by mass of medium-density polyethylene resin;

[0043] The middle layer includes 15-25 parts by mass of low-density polyethylene resin, 15-25 parts by mass of linear low-density polyethylene resin and 35-60 parts by mass of medium-density polyethylene resin;

[0044] The inner layer includes 55-75 parts by mass of metallocene linear low-density polyethylene resin and 20-35 parts by mass of medium-density polyethylene resin.

[0045]...

Embodiment 1

[0058] Add the outer layer resin raw material, the middle layer resin raw material and the inner layer resin raw material respectively into the three hoppers of the co-extrusion machine, and the formulas of each resin raw material are listed in Table 1.

[0059] After the raw materials in the three barrels are co-extruded, they are blown, cooled, and shaped by the wind ring. The temperature of the three barrels of the extruder is set to be 170°C for the first stage, 180°C for the second stage, and 190°C for the third stage. °C, die head temperature: 195 °C; set the air inlet temperature inside and outside the air ring to 20 °C, the rotating traction cooling temperature to 35 °C, the air volume of the air cushion roller to 50%, and the inflation ratio to 2.

[0060] Corona treatment is performed on the outer layer of the film after inflation, cooling and shaping, and the corona treatment power is set to 3KW. After corona treatment, a PE film for hygiene product packaging is obta...

Embodiment 2

[0062] The preparation procedure of the PE film of this example is the same as that of Example 1. The raw material formula is listed in Table 1, and the process parameters are listed in Table 2. The total thickness of the film prepared in this example is 50 μm, wherein the outer layer, middle layer and inner layer of the film The layer thickness ratio is 1:2:1. The performance of the PE film prepared in this example was tested, and the test results are shown in Table 3.

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Abstract

The invention provides a PE film which is formed by co-extruding a corona layer, a middle layer and an inner layer. The corona layer comprises metallocene linear low density polyethylene resin and medium density polyethylene resin. The middle layer comprises low density polyethylene resin, linear low density polyethylene resin and medium density polyethylene resin. The inner layer comprises metallocene linear low density polyethylene resin and medium density polyethylene resin. The corona layer and the inner layer each comprises the high-proportion metallocene linear low density polyethylene resin, so that the PE film has good heat sealing performance, and the medium density polyethylene resin added in the corona layer, the middle layer and the inner layer enable the film to have good stiffness and flexibility, and the PE film is suitable for package of hygienic products.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a PE film and a preparation method thereof. Background technique [0002] PE film is polyethylene film, which is a polyethylene film produced by flat extrusion and blown process, also known as unstretched polyethylene film. Compared with polypropylene film, polyester film and polyvinyl chloride film, PE film not only has lower cost, but also has good flexibility, heat sealing performance and vertical and horizontal properties; and PE film can also be plated after corona treatment. Aluminum, printing, or compounding with other materials to obtain films with better performance, so PE films are widely used as packaging materials for food, daily necessities and electronic products, and are currently widely used as plastic packaging materials. In addition, PE film has excellent water vapor and gas barrier properties, and is especially suitable for use as a packaging film ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/20B29D7/01B29C47/06B29C59/10
CPCB29C48/18B29C59/10B29D7/01B32B27/20B32B27/327B32B33/00B32B2307/558
Inventor 陈付兵汪飞方洲胡鸿波谢永胜
Owner 永新股份(黄山)包装有限公司
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