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Heat-sealing polyvinylidene chloride coating film and manufacture method thereof

A technology of polyvinylidene chloride and its manufacturing method, which is applied in the direction of chemical instruments and methods, coatings, layered products, etc., can solve the problems of weak heat sealing strength, high cost, complicated process, etc., and achieve good heat sealing performance, Effects of reducing packaging costs and expanding the range of applications

Active Publication Date: 2011-11-23
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, in order to expand the application scope of polyvinylidene chloride coating film, people try every means to modify polyvinylidene chloride coating emulsion, mainly to improve the oxygen barrier performance and barrier property of polyvinylidene chloride coating film. However, these technologies cannot solve the problem of weak heat-sealing strength of traditional polyvinylidene chloride coating films. In order to apply the oxygen barrier properties and water barrier properties of polyvinylidene chloride coating films, it is necessary to use High performance materials are compounded, and the increase in the compounding process also increases the cost. The complicated process and expensive cost cause users to simply replace them with various aluminized films, which greatly limits the application of traditional polyvinylidene chloride coated films. scope

Method used

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  • Heat-sealing polyvinylidene chloride coating film and manufacture method thereof

Examples

Experimental program
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Embodiment 1

[0022] Pass 48kg of deionized water into a 200L reactor, add 1.5kg of sodium persulfate, stir at 60 rpm, and control the temperature at 38°C. Use a constant flow pump to add 2.8 kg of ethylene and 36 kg of polyvinylidene chloride to the reactor at a constant speed at a rate of 200 g / min. During the feeding process, the temperature of the reactor is 40°C and the stirring speed is 60 rpm. Raise the temperature of the reactor and control it at 72°C, add 5 kg of acrylic acid to the reactor at a constant speed using a constant flow pump, and keep the temperature constant for 30 minutes after the addition. The temperature was raised to 88° C., and 4 kg of ethyl methacrylate was added at a constant speed using a constant flow pump. The addition rate was 80 g / min. Keep the temperature at constant temperature for 1 hour and stir at a speed of 80 revolutions per minute to prepare a polyvinylidene chloride coating solution with heat-sealing properties for coating. Turn on the reel coat...

Embodiment 2

[0024] Pass 48 kg of deionized water into a 200L reactor, add 2 kg of sodium persulfate, stir at 100 rpm, and control the temperature at 35°C. Use a constant flow pump to add 2 kg of ethylene and 39 kg of polyvinylidene chloride to the reactor at a constant speed at a rate of 250 g / min. During the feeding process, the temperature of the reactor is 40°C and the stirring speed is 80 rpm. Raise the temperature of the reactor to control it at 65° C., add 4 kg of acrylic acid to the reactor at a constant speed using a constant flow pump, and keep the temperature constant for 30 minutes after the addition. The temperature was raised to 85° C., and 3.5 kg of ethyl methacrylate was added at a constant speed using a constant flow pump. The addition rate was 80 g / min. Keep the temperature constant for 1 hour and stir at 100 rpm to prepare a polyvinylidene chloride coating solution with heat-sealing properties for coating. Turn on the reel coater, unwind the OPP substrate film into the...

Embodiment 3

[0026] Pass 52 kg of deionized water into a 200L reactor, add 1 kg of sodium persulfate, stir at 80 rpm, and control the temperature at 40°C. Use a constant flow pump to add 3.5 kg of ethylene and 37 kg of polyvinylidene chloride to the reactor at a constant speed at a rate of 250 g / min. During the feeding process, the temperature of the reactor is 35° C. and the stirring speed is 100 rpm. Raise the temperature of the reactor and control it at 75°C, add 5.5 kg of acrylic acid to the reactor at a constant speed using a constant flow pump, and keep the temperature constant for 30 minutes after the addition. The temperature was raised to 90° C., and 4.5 kg of ethyl methacrylate was added at a constant speed using a constant flow pump. The addition rate was 50 g / min. Keep the temperature at constant temperature for 1 hour and stir at a speed of 80 revolutions per minute to prepare a polyvinylidene chloride coating solution with heat-sealing properties for coating. Turn on the re...

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Abstract

The invention relates to a heat-sealing polyvinylidene chloride coating film, comprising a base material and a coating layer on a base material surface. A primer layer is arranged between the coating layer and the base material; the coating layer is formed by coating a modified heat-sealing polyvinylidene chloride latex prepared by the invention on the primer layer and drying; and the heat-sealing polyvinylidene chloride latex is prepared from raw materials of, by weight, 1-2 parts of sodium persulfate, 48-52 parts of deionized water, 2-3.5 parts of ethylene, 34.5-39.5 parts of polyvinylidenechloride and 4-5.5 parts of acrylic acid. The manufacture method comprises steps that a polyvinylidene chloride emulsion is first modified to prepare a heat-sealing polyvinylidene chloride latex withgood heat-sealing performance, and the heat-sealing polyvinylidene chloride latex prepared by the invention is coated on various base materials by coating equipment, dried and solidified to obtain the heat-sealing polyvinylidene chloride coating film of the invention finally.

Description

Technical field [0001] The invention relates to a heat-sealable polyvinylidene chloride coating film and a manufacturing method thereof. On the premise of maintaining the high barrier performance of the original polyvinylidene chloride coating film, its heat sealing performance is improved, and the traditional polyvinylidene chloride coating film is solved. The problem of low heat-sealing strength of vinylidene chloride-coated film reduces the need for traditional polyvinylidene chloride-coated film to be compounded with other heat-sealing materials such as unstretched polypropylene film to meet the heat-sealing performance of packaging materials, reducing the need for packaging The cost makes the application field of polyvinylidene chloride coated film wider. The invention belongs to the field of novel polymer materials. Background technique [0002] In recent years, in order to expand the application scope of polyvinylidene chloride coating film, people try every means to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B7/12C09D151/06C08J7/04
Inventor 王波胡连芹
Owner HAINAN SHINER IND