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Biaxial stretching polypropylene contraction single film and its preparation method

A technology of biaxial stretching and polypropylene, applied in the direction of chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problem of high cost, and achieve the effect of good tensile performance and good shrinkage performance

Inactive Publication Date: 2004-02-25
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-cost, biaxially oriented polypropylene heat-shrinkable single film suitable for coating processing, so as to reduce the problem of high cost when traditional shrink film is used to process shrink coating film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The weight content of homopolypropylene in the upper layer and the lower layer is 98.8%, and the silicon dioxide is 0.2%, and the middle layer is 90% homopolypropylene and 10% hydrogenated resin. It stretches 5.3 times longitudinally and 8.6 times transversely.

Embodiment 2

[0024] The weight content of copolymerized polypropylene in the upper layer is 97.9%, silicon dioxide 0.1%, and silicone 2%. The middle layer is 85.4% by weight homopolypropylene and 0.2% high molecular weight amine, 0.2% ethoxylated amine, 0.2% glycerol monostearate and 14% hydrogenated resin. The lower layer is 99.8% (wt%) homopolypropylene and 0.2% silica antiblock. It stretches 5.3 times longitudinally and 8.6 times transversely.

Embodiment 3

[0026] The weight content of homopolypropylene in the upper layer is 97.8%, silicon dioxide 0.2%, and silicone 2%. The middle layer is 82.5% by weight homopolypropylene with 0.2% high molecular weight amine, 0.3% ethoxylated amine and 17% hydrogenated resin. The lower layer is 98.8% (wt%) copolymerized polypropylene, 0.2% silica antiblock and 1% silicone. It stretches 5.5 times longitudinally and 8.6 times transversely.

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PUM

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Abstract

The present invention discloses a bidirectional stretched polypropylene single film and its preparation method. The single film is divided into upper, intermediate and lowr three-layer structure. Itsexternal layer is film anti-sticking smooth face layer. Intermediate layer is film core layer and lower layer is film anti-sticking smooth face layer. The upper layer is formed from homopolypolypropylene and anti-sticking slipping agent whose weight content is 0.2-6%, its intermediate layer contains homopolypolypropylene and its lower layer contains homopolypolypropylene and anti-sticking slipping agent whose weight content is 0.2-6%. Its production method includes the steps of preparing material, extruding, casting sheet, longitudinal stretching, transverse stretching and rolling up.

Description

technical field [0001] The invention relates to a biaxially stretched polypropylene shrinkable single film and a manufacturing method thereof, thereby providing the possibility of producing BOPP heat-shrinkable coating films. Background technique [0002] At present, the biaxially stretched film produced by the traditional biaxial stretching process technology can be classified into BOPP single film and BOPP heat-sealing film in terms of structure; in terms of performance, there are BOPP shrink film and BOPP ordinary film, but there is still no such film at home and abroad. Production and test report of BOPP shrinkable single film. BOPP shrinkable single film refers to a BOPP single film with a thermal shrinkage rate of more than 3% in the vertical and horizontal directions of the film in a constant temperature environment of 120 degrees Celsius. Since there is no heat-sealing layer on the surface of the film, the production cost of the shrink film can be effectively reduce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C61/02B32B27/32
Inventor 林小松黎坛曾令丰
Owner HAINAN SHINER IND
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