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High-barrier composite plastic allowing direct blow molding and preparation method

A composite plastic and high-barrier technology, which is applied in the field of preparation of high-barrier composite plastics, can solve problems such as difficulty in comprehensive barrier properties, high cost of multi-layer composites, unstable blown film formation, etc., to achieve excellent barrier properties and post-processing Convenience, mild results

Inactive Publication Date: 2017-11-28
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-barrier composite plastic that can be directly blown, which can solve the shortcomings of traditional multi-layer composites, such as high cost, difficulty in recycling, unstable blown film formation, and difficulty in possessing comprehensive barrier properties. Most importantly, creative The ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, silica aerogel and graphene are compounded with high-density polyethylene, and the obtained composite plastic can be directly blown into film or prepared into various packaging containers. And has excellent barrier properties, gloss, mechanical strength, stretchability, wear resistance, cold resistance and surface hardness

Method used

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  • High-barrier composite plastic allowing direct blow molding and preparation method

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Effect test

Embodiment 1

[0032] A high-barrier composite plastic capable of direct blow molding and a preparation method thereof, the specific process of preparing the high-barrier composite plastic is as follows:

[0033] Disperse 10kg of graphite oxide in 10kL of deionized water, perform ultrasonic treatment for 60min, then take 9kg of dodecyltrimethylammonium bromide, dissolve it in 1kL of deionized water, stir it well, slowly add it to the graphite oxide dispersion, and raise the temperature to 60°C, magnetically stirred for 80min, then suction filtered, washed with water and dried, and then treated with pulsed ultrasonic waves in a constant temperature cold water bath at about 20°C for 40min to peel off the surface-modified graphite into graphene, and the number of layers is 3~ The 10-layer graphene product is ready for use; 1kg graphene and 40kg ethylene-vinyl alcohol copolymer (vinyl mass fraction is 35%), 30kg ethylene-vinyl acetate copolymer (vinyl acetate mass fraction is 30%) and Add 29kg o...

Embodiment 2

[0036] A high-barrier composite plastic capable of direct blow molding and a preparation method thereof, the specific process of preparing the high-barrier composite plastic is as follows:

[0037] Disperse 11kg of graphite oxide in 10kL of deionized water, perform ultrasonic treatment for 50min, then take 8kg of tetradecyltrimethylammonium bromide, dissolve it in 1kL of deionized water, stir it well, slowly add it to the graphite oxide dispersion, and raise the temperature to 60°C, magnetically stirred for 70 minutes, then suction filtered, washed with water and dried, and then treated with pulsed ultrasonic waves in a constant temperature cold water bath at about 20°C for 30 minutes to peel off the surface-modified graphite into graphene, and the number of layers is 3~ The 10-layer graphene product is ready for use; 2kg graphene and 35kg ethylene-vinyl alcohol copolymer (vinyl mass fraction is 35%), 35kg ethylene-vinyl acetate copolymer (vinyl acetate mass fraction is 30%) an...

Embodiment 3

[0040] A high-barrier composite plastic capable of direct blow molding and a preparation method thereof, the specific process of preparing the high-barrier composite plastic is as follows:

[0041] Disperse 12kg of graphite oxide in 10kL of deionized water, perform ultrasonic treatment for 55min, then take 10kg of dodecyltrimethylammonium bromide, dissolve it in 1kL of deionized water, stir it well, slowly add it to the graphite oxide dispersion, and raise the temperature to 60°C, magnetically stirred for 70 minutes, then suction filtered, washed with water and dried, and then treated with pulsed ultrasonic waves in a constant temperature cold water bath at about 20°C for 35 minutes to peel off the surface-modified graphite into graphene, and the number of layers is 3~ The 10-layer graphene product is ready for use; 2kg graphene and 40kg ethylene-vinyl alcohol copolymer (vinyl mass fraction is 35%), 30kg ethylene-vinyl acetate copolymer (vinyl acetate mass fraction is 30%) and ...

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Abstract

The invention belongs to the technical field of preparation of high-barrier composite plastic and provides high-barrier composite plastic allowing direct blow molding and a preparation method. According to the method, surface-modified graphene oxide is firstly prepared and mixed with an ethylene-vinyl alcohol copolymer, an ethylene-vinyl acetate copolymer and silicon dioxide aerogel in a certain ratio, high-density polyethylene grafted maleic anhydride is added, and low-temperature grinding and homogenization are performed; a product, high-density polyethylene and an antioxidant are subjected to extrusion palletization, and the high-barrier composite plastic allowing direct blow molding is obtained. Silicon dioxide aerogel has a porous network structure and is interwoven and compounded with a polymer and graphene, an interweaving body structure capable of obstructing oil, gas and water is formed in the whole system, a directly blow-molded film has high barrier property, and defects of complicated conventional barrier film multi-layer composite process and high cost are overcome.

Description

technical field [0001] The invention relates to the technical field of preparation of high-barrier composite plastics, in particular to a high-barrier composite plastic capable of direct blow molding and a preparation method. Background technique [0002] According to a market report on high-barrier packaging films recently released by a British consulting firm, global high-barrier packaging films are expected to maintain a compound annual growth rate of 4.7%, and the global high-barrier packaging film market will continue to grow from $9 billion in 2016 to It could reach $11.32 billion in 2021. In 2016, a total of 1.86 million tons of high-barrier films were consumed globally, and the consumption is expected to continue to grow at a compound annual growth rate of 4.6%, reaching an annual consumption of 2.23 million metric tons by 2021. In my country's food packaging materials, the amount of plastic application has exceeded 50% of the total food packaging materials. Food p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L51/06C08K13/06C08K9/04C08K3/04C08K7/26C08K5/134C08J5/18
CPCC08L23/06C08J5/18C08J2323/06C08J2423/08C08J2451/06C08L2201/14C08L2203/16C08L2205/02C08L2205/035C08L2207/062C08L23/0861C08L23/0853C08L51/06C08K13/06C08K9/04C08K3/04C08K7/26C08K5/1345
Inventor 陈庆曾军堂陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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