Permeation resisting composite film

A composite film and permeation-resistant technology, which is applied in the field of edible packaging, can solve the problems of image packaging aesthetics and firmness, detachment between layers of packaging structure, affecting packaging sealing, etc., to achieve good printing adaptability and dimensional stability, barrier Improved performance and anti-medium performance, good anti-pollution performance

Active Publication Date: 2016-09-07
永新股份(黄山)包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the packaged gluten contains more oily substances, the defect of oil leakage is very easy to occur
The reasons are as follows: First, due to the influence of oil on the seal, the blending of low-density polyethylene and ordinary linear low-density polyethylene is often difficult to seal in the presence of oily substances such as oil, so it is prone to insufficient sealing strength, which affects packaging. Second, low-density polyethylene and ordinary linear low-density polyethylene blended films generally have insufficient density and poor strength, so they are easily infiltrated by grease, resulting in the problem of detachment between layers in the packaging structure. The beauty and firmness of the packaging, and it is easy to contaminate the packaged food
[0003] In view of this, how to further improve the permeation resistance of the composite membrane in view of the problem that the traditional composite membrane structure is prone to oil leakage has become a technical problem to be solved urgently by those skilled in the art.

Method used

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  • Permeation resisting composite film

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The preparation method of the second polyethylene layer is as follows: add the composite layer resin, the intermediate layer resin and the heat-sealing layer resin into the three barrels of the extruder, and heat each barrel in three stages, and the heating temperature of each barrel is one section It is 120-130℃, the second-stage heating temperature is 130-140℃, the third-stage heating temperature is 140-150℃, the die temperature is 140-160℃, and the extrusion melt pressure is controlled to be less than 45Mpa. The polymer particles in the above three barrels are melted by the extruder and formed into a tube blank. After the tube blank is stretched, compressed air is blown out from the center of the extruder die head to inflate the tube blank into a bubble film, and the bubble The second polyethylene layer is obtained by cooling and shaping the shaped film through an air ring.

[0032] The second polyethylene layer composed of the aforementioned composite layer, intermedia...

Embodiment 1

[0035] The first polyethylene layer is made of 100% by weight of Mitsui 1C7A polyethylene.

[0036] Add the composite layer resin raw material, the intermediate layer resin raw material and the heat-sealing layer resin raw material into the three barrels of the co-extrusion machine. The formula of each resin raw material is as follows:

[0037] Composite layer: 25Kg Yangba 2420H+75Kg Yangzi 7042

[0038] Middle layer: 25Kg Yangba 2420H+25Kg Yangzi 7042+25KgHTA108

[0039] Heat sealing layer: 50Kg Q281+25KgSP1520.

[0040] First, print the polyester layer and dry composite with the first polyethylene layer to form a PET / PE semi-finished product, then dry composite with the polyester aluminized layer, and finally dry composite with the prepared second polyethylene layer , And finally form the composite film of the present invention.

[0041] The thickness of the polyester layer is 6 microns, the thickness of the first polyethylene layer is 6 microns, the thickness of the polyester alumini...

Embodiment 2

[0043] The first polyethylene layer is made of 85% Mitsui 1C7A polyethylene and 15% DuPont AE. The thickness of the polyester layer is 25 microns, the thickness of the first polyethylene layer is 15 microns, the thickness of the polyester aluminized layer is 15 microns, and the thickness of the second polyethylene layer is 90 microns. The rest is the same as in Example 1.

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Abstract

The invention discloses a permeation resisting composite film. The permeation resisting composite film comprises a polyester layer, a first polyethylene layer, a polyester aluminum coated layer and a second polyethylene layer from outside to inside in sequence. The second polyethylene layer is composed of a composite layer, a middle layer and a heat sealing layer, wherein the composite layer is composed of low-density polyethylene and linear low-density polyethylene according to the weight ratio of 1:3, the middle layer is composed of low-density polyethylene, linear low-density polyethylene and high-density polyethylene according to the weight ratio of 1:1:1, and the heat sealing layer is composed of low-density polyethylene and metallocene polyethylene according to the weight ratio of 2:1. By improving the formula of the second polyethylene layer and using 2050 glue between the polyester aluminum coated layer and the second polyethylene layer, barrier property and medium resistance of the product are improved greatly while the requirement for heat sealing strength is met; meanwhile, pollution resistance is high, and the permeation resisting composite film is especially suitable for packaging oily substances such as gluten.

Description

Technical field [0001] The invention relates to the field of edible packaging, in particular to a permeation-resistant composite membrane. Background technique [0002] In recent years, the fast-moving consumer food industry is gradually rising, its demand is increasing, and more and more consumers have higher and higher requirements for functional packaging of fast-moving consumer goods. However, when the packaged gluten contains more oily substances, the defect of oil leakage is very easy to occur. The reasons are as follows: First, because of the influence of grease at the seal, the blending of low-density polyethylene and ordinary linear low-density polyethylene is often difficult to seal in the presence of oily substances such as grease, so it is easy to have insufficient sealing strength and affect packaging The sealing performance; Second, the low-density polyethylene and ordinary linear low-density polyethylene blended films generally have the problems of insufficient de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/36B32B27/32
CPCB32B27/08B32B27/32B32B27/36B32B2250/05B32B2307/31B32B2307/558B32B2307/7265B32B2439/70
Inventor 潘健胡继超张春生王卫民张军林镇海
Owner 永新股份(黄山)包装有限公司
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