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A kind of preparation method of plastic packaging material for refrigeration

A technology of plastic packaging and outer materials, which is applied in packaging, wrapping paper, transportation and packaging, etc. It can solve the problems that plastic packaging cannot be refrigerated and fresh-keeping time, affecting food quality, etc., to improve the refrigeration effect, reduce heat dissipation, and maintain internal temperature Effect

Active Publication Date: 2020-12-08
湖州达立智能设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are many foods that need to be refrigerated and kept fresh, such as all kinds of fresh food, cold drinks and cream products that are afraid of heat, etc., often appear on the way from the mall to home. Cold drinks or cream products melt on the way; However, at present, plastic packaging has problems such as inability to refrigerate and keep fresh or for a short time, which affects the quality of food

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] S1: Mix 5 parts of nano-alumina airgel, 3 parts of quartz fiber, 2 parts of polycrystalline mullite fiber and 30 parts of water, stir and react at a rate of 500r / min for 3min; then add 8 parts of citric acid and continue Stir for 35 minutes;

[0022] S2: drying the substance obtained in step S1 at 140° C. for 20 minutes, taking out the solid, crushing and sieving to obtain a prefabricated powder;

[0023] S3: Mix the above-mentioned prefabricated powder body, 2 parts of silicon carbide, 3 parts of zirconium silicate and 40 parts of PVC, raise the temperature to 150°C, and press under a pressure of 15 MPa to form the outer layer material;

[0024] S4: Mix 15 parts of polycarbonate-1,4-butylene glycol, 20 parts of phenolic resin, 8 parts of lauryl alcohol, 10 parts of tributyl citrate, 7 parts of 2-ethylhexanoic acid and 3 parts of hexamethylene Mix the tetraamines, stir at a rate of 800r / min for 10min, heat up to 170°C, and press under a pressure of 10MPa to form an inn...

Embodiment 2

[0028] S1: Mix 7 parts of nano-alumina airgel, 6 parts of quartz fiber, 6 parts of polycrystalline mullite fiber and 50 parts of water, stir and react at a rate of 800r / min for 5min; then add 12 parts of citric acid, continue Stir for 55 minutes;

[0029] S2: drying the substance obtained in step S1 at 160° C. for 30 minutes, taking out the solid, crushing and sieving to obtain a prefabricated powder;

[0030] S3: Mix the above-mentioned prefabricated powder body, 5 parts of silicon carbide, 7 parts of zirconium silicate and 60 parts of PVC, raise the temperature to 170°C, and press under a pressure of 25 MPa to form the outer layer material;

[0031] S4: 25 parts of polycarbonate-1,4-butylene glycol, 30 parts of phenolic resin, 12 parts of lauryl alcohol, 15 parts of tributyl citrate, 10 parts of 2-ethylhexanoic acid and 6 parts of hexamethylene Mix the tetraamines, stir at a speed of 1000r / min for 20min, heat up to 200°C, and press under a pressure of 20MPa to form an inner...

Embodiment 3

[0035] S1: Mix 5 parts of nano-alumina airgel, 4 parts of quartz fiber, 3 parts of polycrystalline mullite fiber and 35 parts of water, stir and react at a rate of 550r / min for 3min; then add 8 parts of citric acid and continue Stir for 40min;

[0036] S2: drying the substance obtained in step S1 at 145° C. for 25 minutes, taking out the solid, crushing and sieving to obtain a prefabricated powder;

[0037] S3: Mix the above-mentioned prefabricated powder body, 3 parts of silicon carbide, 4 parts of zirconium silicate and 45 parts of PVC, raise the temperature to 155°C, and press under a pressure of 17MPa to form the outer layer material;

[0038] S4: Mix 17 parts of polycarbonate-1,4-butylene glycol, 23 parts of phenolic resin, 9 parts of lauryl alcohol, 12 parts of tributyl citrate, 8 parts of 2-ethylhexanoic acid and 4 parts of hexamethylene Mix the tetraamines, stir at a speed of 850r / min for 12min, heat up to 180°C, and press under a pressure of 12MPa to form an inner la...

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PUM

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Abstract

The invention provides a preparation method of a plastic packaging material for refrigeration. The method comprises the steps that nanometer aluminum dioxide gel, quartz fiber, polycrystalline mullitefiber and water are mixed, and a stirring reaction is performed at the rate of 500-800 r / min for 3-5 min; then, citric acid is added, stirring continues to be performed for 35-55 min; the materials are dried under the temperature of 140-160 DEG C for 2030 min, solid is taken out, and smashing and screening are performed to obtain a prefabricated powder body; then, silicon carbide, zirconium silicate and PVC are added to be mixed, the temperature is increased to 150-170 DEG C, and under pressure of 15-25 MPa, the mixture is pressed into an outer layer material; polycarbonate-1,4-butylene phthalate, phenolic resin, laurinol, tributyl citrate, 2-ethylhexoic acid and hexamethylenetetramine are mixed and stirred under the rate of 800-1,000 r / min for 10-20 min, the temperature is increased to 170-200 DEG C, and pressing is performed under the pressure of 10-20 MPa to obtain an inner layer material; a 2-4 cm gap is reserved between the inner layer material and the outer layer material, integral pressing is performed under the temperature of 120-140 DEG C and the pressure of 8-13 MPa to obtain the plastic packaging material for refrigeration.

Description

technical field [0001] The invention relates to the technical field of plastic packaging preparation, in particular to a method for preparing plastic packaging materials for refrigeration. Background technique [0002] Food cold chain refers to the processing, storage, transportation, and distribution of perishable foods after they are purchased or caught from the place of origin. Retail, until it is transferred to the hands of consumers, its various links are always in the low temperature environment necessary for the product, so as to ensure the quality and safety of food, reduce consumption, and prevent pollution. A special supply chain system. With the improvement of people's living standards, the increasing emphasis on food safety, and the deliberate pursuit of food freshness, low-temperature logistics will become a boom. But at present, frozen refrigerated food cannot be more widely used as gift bags and online shopping. All kinds of food sold on the market need to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D65/42
CPCB65D65/42
Inventor 孙世华
Owner 湖州达立智能设备制造有限公司