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Heat-seal interface easily-torn PE thin film and preparation method thereof

An interface and film technology, applied in chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of poor sealing and not easy to tear of PE composite film, and achieve good sealing, good temperature resistance, and ensure processability. Effect

Inactive Publication Date: 2018-12-07
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to provide a PE film that can be easily peeled off at the heat-sealing interface, so as to solve the problem of poor sealing or difficult tearing of the existing PE composite film

Method used

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  • Heat-seal interface easily-torn PE thin film and preparation method thereof
  • Heat-seal interface easily-torn PE thin film and preparation method thereof
  • Heat-seal interface easily-torn PE thin film and preparation method thereof

Examples

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preparation example Construction

[0036] The present application also provides a method for preparing a heat-sealed interface easy-to-open PE film, comprising the following steps:

[0037] 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;

[0038] Inflate, cool and shape the melt film, and then corona treat the corona layer to obtain a PE film;

[0039] The corona layer includes 20 to 30 parts by mass of low-density polyethylene resin and 70 to 80 parts by mass of high-density polyethylene resin;

[0040] The middle layer includes 20-30 parts by mass of low-density polyethylene resin and 40-60 parts by mass of high-density polyethylene resin;

[0041] The inner layer includes 55-75 parts by mass of coated low-density polyethylene resin, 20-30 parts by mass of high-density polyethylene resin and 3-15 parts by mass of polybutene resin.

[0042] In the p...

Embodiment 1

[0054] 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.

[0055] 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.

[0056] 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

[0058] The preparation process of the PE film in this example is the same as in 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. The layer thickness ratio is 1:1.5:1. 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 discloses a heat-seal interface easily-torn PE thin film, which is formed by coextruding a corona layer, a middle layer and an inner layer, wherein the corona layer contains low-densitypolyethylene resin and high-density polyvinyl resin; the middle layer contains low-density polyethylene resin and high-density polyvinyl resin; the inner layer contains coated low-density polyethylene, high-density polyvinyl resin, polybutylene resin and polyester modified organosilicone. The coated low-density polyethylene is added into the inner layer, so that the thin film has good heat seal property, and the polyester modified organosilicone added into the inner layer has heat seal property, so that the heat-seal intensity value of the thin film is controlled within certain range and is easily torn off a heat-seal surface without complete damage or filament raising, and therefore, the PE thin film is suitable for being used as an easily-torn seal cup lid film, easily-torn mask productpackages and easily-torn medical dressing packages.

Description

technical field [0001] The invention relates to the field of composite flexible packaging, in particular to a PE film with an easily peelable heat-sealing interface and a preparation method thereof. Background technique [0002] With the development of society and the improvement of people's living standards, the requirements for packaging are becoming more and more abundant. In some fields, production and consumers are constantly requiring product packaging to ensure that the product will not be damaged and deteriorated during storage and transportation. It is convenient for consumption and use, and can be disassembled quickly. Especially in the packaging of medical dressings and mask products, it can also be used as a cover film on cup products such as jelly. Medical dressings are mainly used by doctors in hospitals during surgery. It is required that the packaging bag should be easy to open and must not have tiny membranes or debris. The existing packaging is mainly a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/18B32B27/08B32B27/06B32B33/00B65D65/40B29C69/02B29L7/00
Inventor 姚荣潘健董文辉汪学文
Owner HUANGSHAN NOVEL
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