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Ultra-thick PVDC membrane and preparation method thereof

A manufacturing method and film technology, which are applied in the field of ultra-thick PVDC film and its manufacturing, can solve the problems of increasing the water temperature of thick film socks, and achieve the effects of good mechanical adaptability and high tensile strength

Inactive Publication Date: 2019-01-01
洛阳兴瑞新材料科技有限公司
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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 solve the technical problem of rising water temperature in the production of thickened film socks, thereby providing a solution for the production of ultra-thick films, obtaining stable production, and solving the problems raised in the above-mentioned background technology

Method used

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  • Ultra-thick PVDC membrane and preparation method thereof
  • Ultra-thick PVDC membrane and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. According to the above formula, it consists of the following parts by weight: including 1000 parts of PVDC, 3 parts of red pigment or yellow-brown pigment, 1 part of DBS, 0.5 part of internal lubricant, 0.5 part of external lubricant, 0.5 part of SiO2 , batching, and mixing in a high-speed mixer, the stirring time is controlled within 5 minutes, and the stirring temperature is controlled below 60°C. Sieve and let stand for more than 24 hours.

[0037] 2. The rotation speed of the extruder screw is 28 rpm; the process parameters of each zone are 125°C for the first zone, 155°C for the second zone, 165°C for the third zone, 158°C for the fourth zone, 158°C for the fifth zone, and 155°C for the first zone of the die head. , The second zone is 155°C, the third zone is 155°C, the temperature of the cold water tank is 8°C, the temperature of the warm water tank is 18°C, and the controlled room temperature is 25°C.

[0038] 3. The film blank is blown by compressed air and ...

Embodiment 2

[0042] 1. According to the above formula, it consists of the following parts by weight: including 1000 parts of PVDC, 3.5 parts of red pigment or yellow-brown pigment, 1.5 parts of DBS, 0.75 parts of internal lubricant, 0.75 parts of external lubricant, and 0.75 parts of SiO2 The batching is carried out, and the mixing is carried out in a high-speed mixer, the stirring time is controlled within 5 minutes, and the stirring temperature is controlled below 60°C. Sieve and let stand for more than 24 hours.

[0043] 2. The rotation speed of the extruder screw is 28 rpm; the process parameters of each zone are 130°C for the first zone, 160°C for the second zone, 170°C for the third zone, 163°C for the fourth zone, 163°C for the fifth zone, and 160°C for the first zone of the die head. , The second zone is 160°C, the third zone is 160°C, the temperature of the cold water tank is 10°C, the temperature of the warm water tank is 20°C, and the controlled room temperature is 27°C.

[004...

Embodiment 3

[0048] 1. According to the above formula, it consists of the following parts by weight: including 1000 parts of PVDC, 4 parts of red pigment or yellow-brown pigment, 2 parts of DBS, 1 part of internal lubricant, 1 part of external lubricant, and 1 part of SiO2 The batching is carried out, and the mixing is carried out in a high-speed mixer, the stirring time is controlled within 5 minutes, and the stirring temperature is controlled below 60°C. Sieve and let stand for more than 24 hours.

[0049] 2. The extruding screw speed of the extruder is 28 rpm; the process parameters of each zone are 135°C in the first zone, 165°C in the second zone, 175°C in the third zone, 168°C in the fourth zone, 168°C in the fifth zone, and 165°C in the first zone of the die head , The second zone is 165°C and the third zone is 165°C, the temperature of the cold water tank is 15°C, the temperature of the warm water tank is 22°C, and the controlled room temperature is 29°C.

[0050] 3. The film blan...

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Abstract

The invention discloses an ultra-thick PVDC membrane and a preparation method thereof. For the ultra-thick PVDC membrane and the preparation method, by adopting an active circulation method, the problem of circulation of water in PVDC stocking pipe is effectively solved, and the problem that too high water temperature caused by enrichment of heat to cause instability of membrane bubbles and uneventhickness is avoided; and meanwhile, by adopting an infrared drying oven, the shrinking percentage of PVDC is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of PVDC production and processing, in particular to an ultra-thick PVDC film and a manufacturing method thereof. Background technique [0002] PVDC was originally used in moisture-proof packaging for military products. In the middle of the 1950s, it was promoted by the American DOW company to civilian use, and it solved the blown film technology with a thickness of 12 microns and its self-adhesiveness, which was accepted by American housewives. It is still popular as a food preservation film until today. And develop the application of PVDC to western enema. The traditional PVDC casing film is produced by the two-bubble flat blowing process. It is extruded by a single-screw extruder, and the molten resin enters a cold water tank to inhibit crystallization, and then returns to the temperature in a warm water tank to soften the molecular chain for subsequent inflation. Usually the film thickness produced is b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/08C08K13/02C08K3/36C08J5/18B29C55/28
CPCB29C55/28C08J5/18C08J2327/08
Inventor 赵新峰罗中华高俊伟
Owner 洛阳兴瑞新材料科技有限公司
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