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Food-grade rust-proof biaxially-oriented polypropylene film and preparation method thereof

A biaxially oriented film, polypropylene technology, applied in anti-corrosion coatings, flat products, other household appliances, etc., can solve the problems of high cost, single function, flame retardant performance, poor stretchability, etc., and reduce packaging costs. , Expand the scope of application, improve the effect of water vapor barrier performance

Inactive Publication Date: 2019-01-18
SICHUAN GAOSHENG PACKAGING PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional food-grade anti-rust polypropylene biaxially oriented film on the market has poor flame retardancy and stretchability, and has relatively single functions, and does not have antistatic, anti-ultraviolet and other functions. At the same time, the existing food-grade The anti-rust polypropylene biaxially oriented film’s water resistance performance can no longer meet the packaging requirements of products that are sensitive to water vapor, such as Wangwang snow cakes. In order to meet the packaging requirements of these special foods, the current practice is to use various aluminized films or Aluminum foil composite packaging, the cost is high, and this type of packaging is opaque, consumers cannot see the state of the packaged goods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Pass 90 kg of deionized water into a 200L reactor, add 1 kg of sodium percarbonate, stir at 80 rpm, and control the temperature at 36°C. Use a constant flow pump to add 1 kg of vinyl chloride and 38 kg of polypropylene to the reactor at a constant speed at a rate of 240 g / min. During the feeding process, the temperature of the reactor is 80° C., and the stirring speed is 80 rpm. Raise the temperature of the reactor, control it at 89°C, add 3 kg of polyvinyl alcohol to the reactor at a constant speed using a constant flow pump, and keep the temperature constant for 49 minutes after the addition. The temperature was lowered to 70°C, and 9 kg of propionamide was added dropwise to the reactor at a rate of 240 g / min. After one hour, the temperature was lowered to 99°C, and polytetrafluoroethylene propyl ester was added at a constant speed using a constant flow pump. Keep the temperature constant for 1 hour and stir at 80 rpm to prepare a coating liquid with water vapor barr...

Embodiment 2

[0021] Pass 52 kg of deionized water into a 200L reactor, add 0.9 kg of sodium percarbonate, stir at 80 rpm, and control the temperature at 37°C. Use a constant flow pump to add 0.9 kg of vinyl chloride and 37 kg of polypropylene to the reactor at a constant speed at a rate of 200 g / min. During the feeding process, the temperature of the reactor is 90° C., and the stirring speed is 80 rpm. Raise the temperature of the reactor and control it at 88°C, add 3.9 kg of polyvinyl alcohol 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 lowered to 70°C, and 6 kg of propionamide was added dropwise to the reactor at a rate of 70 g / min. After one hour, the temperature was lowered to 90°C, and polytetrafluoroethylene propyl ester was added at a constant speed using a constant flow pump. Keep the temperature constant for 1 hour and stir at 80 rpm to prepare a coating liquid with water va...

Embodiment 3

[0023] Pass 95 kg of deionized water into a 200L reactor, add 1.9 kg of sodium percarbonate, stir at 240 rpm, and control the temperature at 40°C. Use a constant flow pump to add 1.9 kg of vinyl chloride and 39 kg of polypropylene to the reactor at a constant speed at a rate of 300 g / min. During the feeding process, the temperature of the reactor is 80° C., and the stirring speed is 240 rpm. Raise the temperature of the reactor, control it at 90°C, add 2.9 kg of polyvinyl alcohol to the reactor at a constant speed using a constant flow pump, and keep the temperature constant for 49 minutes after the addition. The temperature was lowered to 69°C, and 6.9 kg of propionamide was added dropwise to the reactor at a rate of 80 g / min. After one hour, the temperature was lowered to 99°C, and polytetrafluoroethylene propyl ester was added at a constant speed using a constant flow pump. Constant temperature for 1 hour, stirring speed at 90 rpm, that is, a coating liquid with water vapo...

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PUM

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Abstract

The invention relates to a food-grade rust-proof biaxially-oriented polypropylene film. The food-grade rust-proof biaxially-oriented polypropylene film comprises a substrate and a coating layer on thesubstrate surface, wherein a primer layer is arranged between the coating layer and the substrate; the coating layer is a modified polypropylene coating formed by applying modified barrier polypropylene latex to the surface of the primer layer and drying the latex; the ultrahigh vapor-barrier polypropylene latex is prepared from raw materials in parts by weight as follows: 52-95 parts of deionized water, 0.9-1.9 parts of sodium percarbonate, 0.5-2.3 parts of vinyl chloride, 37-40.9 parts of polypropylene, 2.9-3.9 parts of polyvinyl alcohol, 6-8 parts of propionamide and 1-2 parts of polytetrafluoroethylene propyl ester. The traditional food-grade rust-proof biaxially-oriented polypropylene film is modified, so that the food-grade rust-proof biaxially-oriented polypropylene film is endowedwith ultrahigh vapor barrier performance while keeping original characteristics.

Description

technical field [0001] The invention relates to the technical field of food packaging materials, in particular to a food-grade antirust polypropylene biaxially stretched film and a preparation method thereof. Background technique [0002] Food-grade antirust polypropylene biaxially oriented film is a metal protective packaging material that has developed rapidly in recent years. It is a new generation of innovative high-tech products based on the combination of polymer materials and VCI vapor phase antirust technology. After the anti-rust article is packaged and sealed with this film, the VCI contained in the film begins to sublimate and volatilize the anti-rust gas factor, which diffuses and penetrates to the surface of the anti-rust article and adsorbs on it, forming a dense protective film layer with a thickness of one molecule, which insulates Various factors that induce corrosion are in contact with the surface of the anti-rust object, thereby effectively preventing the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D123/12C09D5/08C09D7/65C08F255/02C08F214/06B29C41/24B29L7/00C08L77/00C08L23/12C08L67/02
CPCB29C41/24B29L2007/00C08F255/02C08J7/042C08J2323/12C08J2367/02C08J2377/00C08J2423/12C08J2475/04C08L2201/14C08L2205/03C09D5/08C09D123/12C08L29/04C08L27/18C08F214/06
Inventor 刘俊成
Owner SICHUAN GAOSHENG PACKAGING PROD
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