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Biaxial stretching polypropylene 9 mu m ultra thin type compound film and method of preparing the same

A biaxially stretched, polypropylene technology, applied in the field of packaging materials, can solve the problems of reducing the elastic modulus, stiffness, and product performance of the composite film that cannot meet the requirements for use, affecting the anti-blocking and anti-static effects of the film, and saving Effect of processing material, high elastic modulus, high gloss

Active Publication Date: 2008-09-03
江苏恒创包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the thickness of the biaxially stretched composite film is reduced unilaterally, the elastic modulus and stiffness of the composite film will be reduced, and the anti-blocking and antistatic effects of the film will be affected.
The performance of the product cannot meet the requirements of use

Method used

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  • Biaxial stretching polypropylene 9 mu m ultra thin type compound film and method of preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Ingredients

[0018] Upper surface layer and lower surface layer: weigh 96.5kg of homopolypropylene and 3.5kg of cross-linked methyl acrylate.

[0019] Middle layer: take 91.6kg of homopolypropylene, 8.0kg of C9 hydrogenated petroleum resin, 0.2kg of alkyl (C14-18) bis(2-hydroxyethyl)amine and 0.2kg of oleic acid amide 0.1-0.3%.

[0020] 2) Extrude thick slices

[0021] 3) cast piece

[0022] 4) Longitudinal stretching

[0023] The longitudinal stretching is 4.50 times, during the longitudinal stretching process, the preheating temperature is 130-140°C, and the stretching temperature is 120-130°C.

[0024] 5) Horizontal stretch

[0025] The transverse stretching is 7.80 times. During the transverse stretching process, the preheating temperature is 160-170°C, and the stretching temperature is 150-160°C.

[0026] 6) Rewinding.

Embodiment 2

[0028] 1) Ingredients

[0029] Upper surface layer: weigh 96.0kg of homopolypropylene and 4.0kg of cross-linked methyl acrylate.

[0030] Lower surface layer: weigh 97.0kg of homopolypropylene and 3.0kg of cross-linked methyl acrylate.

[0031] Middle layer: Weigh 92.6kg of homopolypropylene, 7.0kg of C9 hydrogenated petroleum resin, 0.1kg of oleic acid amide and 0.3kg of alkyl (C14-18) bis(2-hydroxyethyl)amine.

[0032] 2) Extrude thick slices

[0033] 3) cast piece

[0034] 4) Longitudinal stretching

[0035] The longitudinal stretching ratio is 4.80, during the longitudinal stretching process, the preheating temperature is 130-140°C, and the stretching temperature is 120-130°C.

[0036] 5) Horizontal stretch

[0037] The transverse stretching ratio is 7.50. During the transverse stretching process, the preheating temperature is 160-170°C, and the stretching temperature is 150-160°C.

[0038] 6) Rewinding.

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Abstract

The invention relates to a biaxial-tensile 9-mum ultra-thin composite polypropylene membrane, which comprises an upper surface layer, a middle layer and a lower surface layer, wherein each layer adopts homo-polypropylene as the base material. The composite membrane is characterized in that cross-linked methyl acrylate with a particle diameter of 2 mum is added into the homo-polypropylene base layer material of the upper and the lower surface layers at a ratio of 3.0 to 5.0% the total weight of the homo-polypropylene base layer material as an anti-adhesion material; and adding C9 hydrogenated petroleum resin into the homo-polypropylene base layer material of the middle layer at a ratio of 5 to 10% the total weight of the homo-polypropylene base layer material as a stiffening agent, adding oleamide with a ratio of 0.1 to 0.3% the total weight of the homo-polypropylene base layer material and adding alkyl(C14 to 18)bis(2-hydrox-yethyl)amine at a ratio of 0.1 to 0.3% the total weight of homo-polypropylene base layer material. The composite membrane has stiffness and no adhesion.

Description

technical field [0001] The invention relates to a biaxially stretched polypropylene composite film, in particular to a biaxially stretched polypropylene 9 μm ultra-thin composite film and a preparation method thereof. It belongs to the technical field of packaging materials. Background technique [0002] With the rapid development of the economy, the social demand for biaxially oriented polypropylene composite films has grown rapidly. Recently, the price of crude oil in the international market has risen steadily, which has prompted the price of raw material PP (polypropylene) particles and films to also rise, which has greatly increased the production costs of composite film trial manufacturers that occupy 1 / 3 of the market share. At present, the thickness of biaxially stretched composite films produced by biaxially stretching technology in the market is in the range of 12-18 μm. If the thickness of the biaxially stretched composite film can be reduced, the production cos...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/18B29C55/12B29D7/01B65D65/40
Inventor 张进麦少华郭华山
Owner 江苏恒创包装材料有限公司
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