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A kind of PVC heat-shrinkable film and preparation method thereof

A heat-shrinkable film and PVC resin technology, applied in the field of PVC heat-shrinkable film and its preparation, can solve the problems of restricting the use of PVC packaging materials, reducing the transparency of PVC materials, and prone to yellowing of PVC, and achieving excellent visible light transmittance , Improve transparency and improve processing performance

Active Publication Date: 2020-11-10
嘉兴新安包装材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the poor stability of polyvinyl chloride to light and heat, it will be decomposed to produce hydrogen chloride during its processing or when it is exposed to ultraviolet radiation, and further autocatalyzed decomposition will cause PVC to easily yellow and reduce the transparency of PVC materials. Therefore, most of the PVC materials used for packaging are colored materials, which also limits the use of PVC packaging materials; and with the prolongation of the light time, the flexibility of PVC shrink film gradually decreases, becomes brittle and its mechanical strength decreases, so in order to improve PVC material The light resistance performance of PVC materials is usually improved by adding light stabilizers

Method used

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  • A kind of PVC heat-shrinkable film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0041] One, the preparation example of light stabilizer

[0042] The nano-titanium dioxide in the following preparations is selected from the model JL-TiO produced by Ningbo Jinlei Nano Material Technology Co., Ltd. 2 -8 rutile nano titanium dioxide; Tetraethyl orthosilicate is selected from the tetraethyl orthosilicate produced by Jinjinle Chemical; Zinc stearate is selected from the zinc stearate that the model produced by Shanghai Chuangyu Chemical Co., Ltd. is 5030; The polymethyl methacrylate is selected from the polymethyl methacrylate produced by Taiwan Chimei with the brand name of CM-203; the silane coupling agent is selected from the silane of the model KH-570 produced by Beijing Jintong Letai Chemical Products Co., Ltd. Coupling agent; triethanolamine is selected from the triethanolamine that the model that U.S. Dow Chemical produces is DOW.

preparation example 1

[0043] Preparation Example 1: ① Take 4kg of silane coupling agent and 1kg of triethanolamine, dissolve them in 20kg of absolute ethanol, and stir to obtain a mixed solution;

[0044] ②Take 10kg of nano-titanium dioxide, heat it up to 110°C, and keep it warm for 10 minutes; then add the mixed solution to the nano-titanium dioxide while stirring within 30 minutes, and stir at a speed of 300r / min for 1 hour to obtain modified nano-titanium dioxide;

[0045] ③Take 4kg of modified nano titanium dioxide, 1kg of tetraethyl orthosilicate, 1kg of zinc stearate, 0.5kg of hexahydrophthalic anhydride and 50kg of polymethyl methacrylate, heat up to 150°C, and use 200r / min After stirring at a high speed for 20 minutes, the light stabilizer was obtained after granulation and drying.

preparation example 2

[0046] Preparation Example 2: ① Take 5kg of silane coupling agent and 1.5kg of triethanolamine, dissolve them in 25kg of absolute ethanol, and stir to obtain a mixed solution;

[0047] ② Take 15kg of nano-titanium dioxide, heat it up to 115°C, and keep it warm for 15 minutes; then add the mixed solution to the nano-titanium dioxide while stirring within 30 minutes, and stir at a speed of 400r / min for 1.5h to obtain modified nano-titanium dioxide;

[0048] ③Take 5kg of modified nano titanium dioxide, 1.5kg of tetraethyl orthosilicate, 1.5kg of zinc stearate, 0.75kg of hexahydrophthalic anhydride and 55kg of polymethyl methacrylate, heat up to 155°C, and use 250r / After stirring at a speed of 25 min, the light stabilizer was obtained after granulation and drying.

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Abstract

The invention discloses a PVC (polyvinyl chloride) heat-shrinkable film and a preparation method thereof, and belongs to the technical field of polymer packaging materials, the PVC heat-shrinkable film comprises the following components in parts by weight: 90-100 parts of PVC resin, 5-7 parts of a flexibilizer, 3-5 parts of a plasticizer, 1-2 parts of a heat stabilizer, 1-2 parts of a light stabilizer, 1-2 parts of a lubricant and 0.5-1 part of an anti-blocking agent; the light stabilizer is prepared from modified nano titanium dioxide, tetraethyl orthosilicate, zinc stearate, hexahydrophthalic anhydride and polymethyl methacrylate through melting and granulation. According to the invention, through the cooperation of the light stabilizer and the thermal stability, the PVC can be protectedduring the PVC processing process and during long-time illumination, so that yellowing is prevented, and good transparency is kept.

Description

technical field [0001] The invention relates to the technical field of polymer packaging materials, more specifically, it relates to a PVC heat-shrinkable film and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) heat shrinkable film is a kind of film packaging material made by blow molding PVC resin and other additives. It is characterized by good transparency, easy shrinkage, high strength and strong operability. It is widely used in the packaging of wine, food, sporting goods, disinfection tableware, daily necessities, handicrafts, audio-visual products, medicines, stationery and other commodities. [0003] Due to the poor stability of polyvinyl chloride to light and heat, it will be decomposed to produce hydrogen chloride during its processing or when it is exposed to ultraviolet radiation, and further autocatalyzed decomposition will cause PVC to easily yellow and reduce the transparency of PVC materials. Therefore, most of the PVC m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L51/04C08L23/30C08L33/12C08K13/06C08K9/06C08K3/22C08K5/12C08K5/11C08K5/57C08K3/36C08K5/1539C08K5/098C08J5/18
Inventor 杨孔飞
Owner 嘉兴新安包装材料股份有限公司
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