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Polyethylene foam material and preparation method thereof

A technology of polyethylene foaming and grafting polyethylene, applied in the field of materials, can solve the problems of poor heat resistance, poor mechanical strength, poor flame retardant effect, etc., and achieve the effects of improving mechanical strength, strength and flame retardant performance.

Pending Publication Date: 2022-07-22
SHIJIAZHUANG QIHONG RUBBER PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current low-density polyethylene foam materials generally have the defects of poor mechanical strength, poor heat resistance, and poor flame retardant effect, and halogen-containing flame retardants are often used to improve the flame retardant effect.

Method used

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  • Polyethylene foam material and preparation method thereof
  • Polyethylene foam material and preparation method thereof

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preparation example Construction

[0037] And, the preparation method of above-mentioned polyethylene foam material comprises the following steps:

[0038] Step a, weigh described low density polyethylene, mica powder and maleic anhydride grafted polyethylene by weight and mix to obtain the first mixture;

[0039] Step b, weighing the chitosan, the polyaziridine crosslinking agent and the flame retardant in parts by weight and mixing at 10-20° C. to obtain a second mixture;

[0040] Step c, add foaming agent (when the component contains stearic acid, stearic acid and foaming agent are added in the first mixture) to the first mixture and mix, then add the second mixture The materials are mixed, thinly smelted into sheets, molded and foamed to obtain the polyethylene foamed material.

[0041] Step c also includes adding the stearic acid when adding the blowing agent to the first mix.

[0042]The present invention can improve the mechanical strength of the foamed material on the one hand and the heat resistance ...

Embodiment 1

[0047] A polyethylene foam material, comprising the following components in parts by weight: 18 parts of low-density polyethylene, 1 part of mica powder, 1.5 parts of maleic anhydride grafted polyethylene, 6.5 parts of chitosan, 2 parts of joint agent, 2 parts of flame retardant, 3 parts of foaming agent and 1.2 parts of stearic acid;

[0048] Wherein, the flame retardant is a mixture of sodium carboxymethyl cellulose and sodium alginate, and the weight ratio of sodium carboxymethyl cellulose and sodium alginate is 2:1; the foaming agent includes AC foaming agent and foaming agent H , the weight ratio of foaming agent AC foaming agent and foaming agent H is 1.4:1.

[0049] Its preparation method comprises the following steps:

[0050] Step a, taking by weight low density polyethylene, mica powder and maleic anhydride grafted polyethylene and mixing to obtain the first mixture;

[0051] Step b: Weighing chitosan, polyaziridine cross-linking agent and flame retardant in parts ...

Embodiment 2

[0054] A polyethylene foam material, comprising the following components in parts by weight: 15 parts of low-density polyethylene, 0.8 parts of mica powder, 1.2 parts of maleic anhydride grafted polyethylene, 6 parts of chitosan, 1.5 parts of joint agent, 1.5 parts of flame retardant, 2.5 parts of foaming agent and 1 part of stearic acid;

[0055] Wherein, the flame retardant is a mixture of sodium carboxymethyl cellulose and sodium alginate, and the weight ratio of sodium carboxymethyl cellulose and sodium alginate is 2:1; the foaming agent includes AC foaming agent and foaming agent H , the weight ratio of foaming agent AC foaming agent and foaming agent H is 1.2:1.

[0056] Its preparation method comprises the following steps:

[0057] Step a, taking by weight low density polyethylene, mica powder and maleic anhydride grafted polyethylene and mixing to obtain the first mixture;

[0058] Step b. Weigh chitosan, polyaziridine cross-linking agent and flame retardant in parts...

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PUM

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Abstract

The invention relates to the field of materials, in particular to a polyethylene foam material and a preparation method thereof. The polyethylene foam material comprises the following components in parts by weight: 10-25 parts of low-density polyethylene, 0.5-2 parts of mica powder, 1-2 parts of maleic anhydride grafted polyethylene, 5-10 parts of chitosan, 1-3 parts of a polyaziridine cross-linking agent, 1-3 parts of a flame retardant and 2-4 parts of a foaming agent. Through cooperation and interaction of different components, the prepared polyethylene foam material is obviously improved in structural stability, mechanical strength, heat resistance and flame retardant effect, meanwhile, the components have antibacterial and preservative effects, and breeding of bacteria and fungi in high-humidity environments such as fruit packaging and the like can be effectively reduced.

Description

technical field [0001] The invention relates to the field of materials, in particular to a polyethylene foam material and a preparation method thereof. Background technique [0002] Polyethylene foam material has excellent physical, chemical and mechanical properties. It is flexible, light in weight, elastic and good in recovery. It can absorb and disperse external impact force by bending to achieve the effect of buffering. Foam material has a series of superior use characteristics such as heat preservation, moisture resistance, friction resistance and corrosion resistance, and is widely used in packaging, chemical and construction fields. [0003] Low-density polyethylene foam materials are generally prepared by using low-density polyethylene as a matrix and adding appropriate amounts of auxiliary agents and foaming agents. Low-density polyethylene, also known as high-pressure polyethylene, is a white resin with a waxy texture. Its molecular structure is a nonlinear struct...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L51/06C08L5/08C08L1/28C08L5/04C08K3/34C08K5/09C08J9/10
CPCC08J9/103C08J9/107C08J9/0061C08J9/0066C08J9/0023C08J2203/04C08J2203/18C08J2323/06C08J2451/06C08J2405/08C08J2401/28C08J2405/04
Inventor 焦建培马少怀董占琢田振领苗春燕
Owner SHIJIAZHUANG QIHONG RUBBER PLASTIC PROD
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