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High-elasticity low-density polyethylene foaming composite material and preparation method thereof

A technology of low-density polyethylene and composite materials, which is applied in the field of foamed composite materials, and can solve problems such as limitations, resilience not exceeding 14%, and high cost

Active Publication Date: 2013-07-31
GUIZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: provide a high-elastic low-density polyethylene foam composite material and its preparation method to solve the current low-density polyethylene (LDPE) ) The resilience of the foamed composite material prepared by the method does not exceed 14%, which cannot meet its technical requirements and has high cost, which limits its industrial application and other problems.

Method used

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  • High-elasticity low-density polyethylene foaming composite material and preparation method thereof
  • High-elasticity low-density polyethylene foaming composite material and preparation method thereof
  • High-elasticity low-density polyethylene foaming composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1, raw material selection:

[0021] Low-density polyethylene, grade 2426H, Dongguan Kelong Plastic Raw Materials Co., Ltd., content 85 parts

[0022] Elastomer is selected polyethylene octene co-elastomer (POE), preferred trade mark 8180, and parts by weight are 15 parts;

[0023] Foaming agent is azodicarbonamide (AC), and parts by weight are 1.5 parts;

[0024] The foaming aid is zinc oxide (ZnO), and the parts by weight are 0.5 parts;

[0025] The crosslinking agent is dicumyl peroxide (DCP), and the parts by weight are 0.2 parts.

[0026] Step 2. Extrusion: The extrusion process is: 90°C in the first zone, 100°C in the second zone, 110°C in the third zone, 125°C in the fourth zone, 125°C in the fifth zone, and 130°C at the head; the screw speed is 40 r / min Under certain conditions, the low-density polyethylene modified material containing elastomer (POE) and crosslinking agent (DCP) is added to the twin-screw extruder, and the modified material A is o...

Embodiment 2

[0031] Step 1. Selection of raw materials: low-density polyethylene, grade 2426H, Dongguan Kelong Plastic Raw Materials Co., Ltd.,

[0032] Low density polyethylene, parts by weight are 85 parts;

[0033] Elastomer is selected polyethylene octene co-elastomer (POE), preferred trade mark 8440, and parts by weight are 15 parts;

[0034] Foaming agent is azodicarbonamide (AC), and parts by weight are 1.5 parts;

[0035] The foaming aid is zinc oxide (ZnO), and the parts by weight are 0.5 parts;

[0036] The crosslinking agent is dicumyl peroxide (DCP), and the parts by weight are 0.2 parts.

[0037] Repeat steps 2-4 in Example 1 to obtain the finished product.

[0038]

Embodiment 3

[0040] Step 1. Selection of raw materials: low-density polyethylene, grade 2426H, Dongguan Kelong Plastic Raw Materials Co., Ltd.,

[0041] Low-density polyethylene, content 85 parts;

[0042] Elastomer is selected polyethylene octene co-elastomer (POE), preferred brand 8450, and parts by weight are 15 parts;

[0043] Foaming agent is azodicarbonamide (AC), and parts by weight are 1.5 parts;

[0044] The foaming aid is zinc oxide (ZnO), and the parts by weight are 0.5 parts;

[0045] The crosslinking agent is dicumyl peroxide (DCP), and the parts by weight are 0.2 parts.

[0046] Repeat steps 2-4 in Example 1 to obtain the finished product.

[0047]

[0048] From the data in Table 1 to Table 6, it can be seen that the high-elastic low-density polyethylene foam composite products made by adding the above-mentioned proportions have ideal foaming quality, and the average cell diameter, cell diameter distribution, and cell density are obvious. It is superior to EP...

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Abstract

The invention discloses a high-elasticity low-density polyethylene foaming composite material and a preparation method thereof. The high-elasticity low-density polyethylene foaming composite material is prepared from the following raw material components in parts by weight: 85-95 parts of low-density polyethylene, 5-15 parts of elastomer, 0.1-0.3 part of crosslinking agent, 1-2 parts of foaming agent and 0.2-0.8 part of blowing promoter. The foaming composite material prepared by the following steps of: burdening, extrusion, drying and injection molding has a high foaming ratio and improved rebound resilience reaching above 16.3%. Compared with present low-density polyethylene foaming sheets on the market, the high-elasticity low-density polyethylene foaming composite material has high cost performance and can be used for solving the problem that the rebound resilience of conventional foaming composite materials prepared by low-density polyethylene (LDPE) generally does not exceed 14%, and as the conventional foaming composite materials cannot reach technical requirements, have high cost and the like, the application of the conventional foaming composite materials in industries is limited.

Description

technical field [0001] The invention belongs to the technical field of foamed composite materials, and in particular relates to a high-elasticity low-density polyethylene foamed composite material and a preparation method thereof. Background technique [0002] Low-density polyethylene (LDPE) composite materials and products are widely used in the market due to their low density, light weight, large specific area, high specific strength, strong energy absorption capacity, good damping, sound insulation and heat insulation performance. In the field of flexible packaging, however, with the fierce market competition, the requirements for the resilience of foamed LDPE products are getting higher and higher. At present, the resilience of foamed composite materials prepared from low-density polyethylene (LDPE) cannot meet its technical requirements, usually not exceeding 14%, and the high cost limits its application in industry. Contents of the invention [0003] The technical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08J9/10C08K3/22C08K5/14B29B9/06B29C47/92B29C45/76B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 龚维张纯何力于杰
Owner GUIZHOU NORMAL UNIVERSITY
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