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Polythene physics foaming material and preparing method thereof

A physical foaming and polyethylene technology, applied in the field of foaming materials, can solve problems such as limited application and corrosion

Inactive Publication Date: 2007-08-08
徐晓冰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the foamed materials obtained by chemical foaming usually contain chemical residues, which have a corrosive effect on the human body and other metal materials, thus greatly limiting its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 , Preparation of polyethylene physical foaming material

[0017] According to formulas 1 to 6, low-density polyethylene, high-density polyethylene, foaming agent (OBSH, TSH or azo foaming agent (ABN, barium azocarbonate, azodicarbonamide)) and additives (Mica powder, talc powder, glass powder, wood powder or calcium carbonate) mix evenly, then add to the single-screw / twin-screw extruder, set the temperature of each section of the extruder at 100-230°C for mixing , make it evenly distributed, and finally extrude and granulate to obtain polyethylene physical foaming material.

[0018] Recipe 1:

[0019] raw material

parts by weight

Low-density polyethylene

20

High-density polyethylene

70

OBSH

5

ABN

5

Mica powder

5

[0020] Recipe 2:

[0021] raw material

parts by weight

Low-density polyethylene

30

High-density polyethylene

...

Embodiment 2

[0030] Example 2 , Performance test of polyethylene physical foaming material

[0031] According to the conventional test method in this area, the performance indexes of the polyethylene physical foaming material prepared by the 6 formulations of Example 1 are tested, and the results are as shown in the following table 1:

[0032] Table 1. Performance indicators of polyethylene physical foaming materials

[0033] Melt flow rate (g / 10mim)

[0034] It can be seen from the results in Table 1 that the various performance indexes of the polyethylene physical foaming material of the present invention have reached a relatively high level in the industry.

Embodiment 3

[0035] Example 3 , Polyethylene physical foaming material is used for foaming

[0036] Get the polyethylene physical foaming material that embodiment 1 obtains and carry out physical foaming, specifically as follows:

[0037] Put the obtained particles into the single-screw / twin-screw extruder. The temperature of each section of the extruder is set between 100-230°C, and then filled with inert gas nitrogen, and the equipment is kept at a pressure of about 30MPa for pre-explosion. Finally, the pre-expanded material is introduced into the mold from the die mouth to make it fully foamed, so as to obtain a foamed material.

[0038] Get the foamed material obtained, and calculate the degree of foaming according to the following formula:

[0039] Foaming degree=1-(weight after foaming / original weight)

[0040] The result is as follows:

[0041] formula

[0042] In summary, the polyethylene physical foaming material prepared according to the formula of the present inve...

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PUM

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Abstract

The invention discloses a physical polyethylene foaming material and making method, which comprises the following steps: adopting low-density polyethylene and high-density polyethylene as raw material; adding foamer and adjuvant; blending in the single-screw / double-squeezer to grain; obtaining the product.

Description

technical field [0001] The invention relates to a foaming material, in particular to a polyethylene physical foaming material and a preparation method thereof. Background technique [0002] Polyethylene foam material is a packaging material and building material with sound insulation, heat preservation, vibration resistance, and high-strength cushioning capabilities, and it has a wide range of uses. [0003] Most of the existing foaming materials used for polyethylene foaming are chemical foaming materials, that is, the final product needs to be further obtained by chemical foaming. As we all know, the foamed material obtained by chemical foaming usually contains chemical residues, which have a corrosive effect on the human body and other metal materials, thus greatly limiting its application. Contents of the invention [0004] The purpose of the present invention is to adjust the formula of polyethylene foaming material to make it suitable for physical foaming, thereby p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08J9/14C08K5/23C08K5/20C08K3/00
Inventor 徐晓冰
Owner 徐晓冰
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