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Low-friction and biaxially oriented polypropylene heat-sealing membrane and manufacturing method thereof

A technology of biaxial stretching and polypropylene, applied in the field of polymers, can solve problems such as difficulty in meeting ultra-high-speed production, and achieve good physical properties

Active Publication Date: 2013-04-03
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent application CN200810244355 discloses a low-friction polypropylene film, which makes the surface friction coefficient ≤0.2 by adding synthetic silica to the raw material; however, the friction coefficient in this range is still difficult to meet the needs of ultra-high-speed production

Method used

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  • Low-friction and biaxially oriented polypropylene heat-sealing membrane and manufacturing method thereof

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Effect test

Embodiment 1

[0024] Films with a thickness of 22 microns were produced. Ingredients: The thickness of the upper layer is 1.0 microns, of which the content of copolymerized polypropylene is 97%, the particle size of 2 μm polybutylene terephthalate is 1%, the polymer silicone is 2%; the thickness of the middle layer is 20 microns, of which homopolypropylene 98%, blended antistatic agent 2% with 20% erucamide, 40% ethoxylated amine and 40% glyceryl monostearate. The thickness of the lower layer is 1.0 microns, and the content of copolymerized polypropylene is 99%, and the content of synthetic silica is 1%.

[0025] Film production: The low-friction coefficient biaxially oriented polypropylene heat-sealing film of the present invention is produced by using a biaxially oriented co-extrusion process, wherein the temperature of the extruder: 225°C; the temperature of the casting machine: 20°C; the longitudinal stretch ratio: 500 %, longitudinal stretching preheating temperature: 112°C, longitudi...

Embodiment 2

[0029] Films with a thickness of 18 microns are produced. Ingredients: the thickness of the upper layer is 0.9 microns, of which the content of copolymerized polypropylene is 97%, polybutylene terephthalate with a particle size of 2 μm is 1.5%, and high molecular silicone is 1.5%; the thickness of the middle layer is 16 microns, of which all polypropylene 99%, blended antistatic agent 1% containing 20% ​​erucamide, 40% ethoxylated amine and 40% glyceryl monostearate. The thickness of the lower layer is 1.1 microns, and the content of copolymerized polypropylene is 99%, and the content of synthetic silica is 1%.

[0030] Film production: The low-friction coefficient biaxially oriented polypropylene heat-sealing film of the present invention is produced by using a biaxially oriented co-extrusion process, wherein the temperature of the extruder: 245°C; the temperature of the casting machine: 25°C; the longitudinal stretch ratio: 530 %, longitudinal stretching preheating temperat...

Embodiment 3

[0032] Films with a thickness of 25 microns are produced. Ingredients: the thickness of the upper layer is 1.0 microns, of which the content of copolymerized polypropylene is 96%, polybutylene terephthalate with a particle size of 2 μm is 2%, high molecular silicone 2%; the thickness of the middle layer is 23 microns, of which homopolypropylene 98%, blended antistatic agent 2% containing 30% erucamide, 30% ethoxylated amine and 40% glyceryl monostearate. The thickness of the lower layer is 1.0 microns, the content of copolymerized polypropylene is 99.5%, and the content of synthetic silica is 0.5%.

[0033] Film production: The low-friction coefficient biaxially oriented polypropylene heat-sealing film of the present invention is produced by using a biaxially oriented co-extrusion process, wherein the temperature of the extruder: 235°C; the temperature of the casting machine: 20°C; the longitudinal stretch ratio: 490 %, longitudinal stretching preheating temperature: 110°C, l...

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Abstract

The invention discloses a low-friction and biaxially oriented polypropylene heat-sealing membrane and a manufacturing method thereof. Aiming at the problem of high friction coefficient of a conventional polypropylene heat-sealing membrane, the silicone is used as a high temperature slipping agent to make the membrane keep relatively low friction coefficient at various temperature, polybutylene terephthalate with the particle size of 2-3 [mu]m is used as an anti-blocking agent to make the membrane have an anti-blocking effect and to reduce the friction coefficient, and erucyl amide of a mixed antistatic agent is used in an interlayer which can be migrated to a surface layer so as to play a slipping role. The obtained low-friction and biaxially oriented polypropylene heat-sealing membrane has very good physical properties, with the friction coefficient of 0.12-0.15, and can meet the requirements of a high speed packaging machine.

Description

technical field [0001] The invention relates to a low-friction biaxially stretched polypropylene heat-sealing film and a manufacturing method thereof, belonging to the technical field of polymers. Background technique [0002] With the development of industrialization, factories are pursuing cost and benefit, and the speed of production and packaging equipment is getting faster and faster. For example, the usual packaging speed of cigarette packaging machines is 350-400 packs / min, and the speed of the newly installed packaging machine is 800 packs / min. The thin film must also keep up with the speed of the equipment. To keep up with the speed of the equipment, the friction coefficient of the film is one of the important parameters. It requires that the friction coefficient be as small as possible. Patent application CN200810244355 discloses a low-friction polypropylene film, which makes the surface friction coefficient ≤ 0.2 by adding synthetic silica to the raw material; how...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/18B32B27/32B65D65/40B29C55/12B29C47/92B29C48/92
Inventor 冯任明黎坛黎海鸥邢青涛
Owner HAINAN SHINER IND
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