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High-strength high-breathability polrvinyl chloride (PVC) preservative film

A polyvinyl chloride and polyvinyl chloride resin technology, which is applied in the preservation of fruits and vegetables, food preservation, food science, etc., can solve the problems of poor moisture permeability, low mechanical strength, affecting the use of polyvinyl chloride plastic wrap, etc. The effect of increased moisture permeability, good moisture permeability, strong adsorption and permeability

Inactive Publication Date: 2011-01-19
天津市食品加工工程中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although the existing polyvinyl chloride cling film has a good fresh-keeping effect, its mechanical strength is not very high and its moisture permeability is poor, which affects the use of polyvinyl chloride cling film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] A formula of high-strength and high-moisture-permeable polyvinyl chloride preservative film by weight: 100 kg of polyvinyl chloride resin (SG-4 type), 4-6 kg of calcium-zinc composite stabilizer, 0.5-1 kg of stearic acid, phthalate Dioctyl formate (DOP) 25-30 kg, polypropylene adipate 20-25 kg, nano-scale silicon dioxide (SiO 2 ) 2-5 kg, 1-3 kg of silane coupling agent, nano calcium carbonate (CaCO 3 ) 2-5 kg, titanate coupling agent 1-3 kg. The above components are made into a film of a certain thickness after kneading, extrusion, blow molding and other processes, which are used for fresh-keeping of agricultural products.

[0027] The main technical feature is that the tensile strength and elongation at break of the plastic wrap are 10%-30% higher than that of ordinary plastic wrap, and the moisture permeability is increased by 10%-20%. To prevent fogging. The nano-scale silicon dioxide particles added in the high-strength and high-moisture-permeable PVC fresh-keepi...

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Abstract

The invention relates to a high-strength high-breathability polrvinyl chloride preservative film which comprises the following components in parts by weight: 100 parts of PVC resin (SG-4 type), 4-6 parts of calcium-zinc compound stabilizing agent, 0.5-1 part of stearic acid, 25-30 parts of dioctyl phthalate (DOP), 20-25 parts of 1,2-propylene glycol adipate, 2-5 parts of nano scale silicon dioxide (SiO2), 1-3 parts of silane coupling agent, 2-5 parts of nano scale calcium carbonate (CaCO3) and 1-3 parts of titanate coupling agent. The components are prepared into a film with a certain thickness through the working procedures of mediating, extruding, blow molding, and the like, and the film is used for retaining the freshness of agricultural products. The preservative film has the main technical characteristics that the tensile strength and the elongation at break of the preservative film are 10-30 percent higher than that of ordinary preservative films, the breathability rate is improved by 10-20 percent, and the preservative film has better packability to the agricultural products and good breathability and can effectively prevent frosting.

Description

technical field [0001] The invention belongs to fruit and vegetable fresh-keeping film, in particular to a high-strength and high-moisture-permeable polyvinyl chloride fresh-keeping film. Background technique [0002] Although the existing polyvinyl chloride cling film has a good fresh-keeping effect, its mechanical strength is not very high and its moisture permeability is poor, which affects the use of the polyvinyl chloride cling film. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-strength and high-moisture-permeable polyvinyl chloride cling film. High strength and high moisture permeability, its stretchability, tearability, coefficient of friction, light transmittance, and heat sealability all meet national standards. [0004] Technical scheme of the present invention is: [0005] A high-strength and high moisture-permeable polyvinyl chloride cling film, characterized in that: [0006] Its formula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L67/02C08K13/06C08K9/04C08K3/26C08K9/06C08K3/36C08K5/09C08K5/12A23B7/00
Inventor 李喜宏王彪肖尧邢亚阁
Owner 天津市食品加工工程中心
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