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Raw material composition, EPE pearl wool material and preparation method thereof

A raw material composition, pearl cotton technology, applied in the field of packaging materials, can solve the problems of cell shrinkage of EPE pearl cotton materials, shrinkage of EPE pearl cotton materials, etc., to ensure the safety of transportation and use, good product performance, and high magnification. Effect

Active Publication Date: 2021-09-28
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved in the present invention is to overcome the CO in the prior art 2 The EPE pearl cotton material prepared as foaming agent is seriously shrinking during the aging period (referring to the standing time after EPE pearl cotton is foamed), and how to overcome pure LDPE foaming to prepare EPE pearl cotton is not studied in the prior art The problem of serious shrinkage of cells in the material, and a kind of raw material composition, EPE pearl cotton material and preparation method thereof are provided

Method used

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  • Raw material composition, EPE pearl wool material and preparation method thereof
  • Raw material composition, EPE pearl wool material and preparation method thereof
  • Raw material composition, EPE pearl wool material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 2

[0043] The talc powder in Example 2 was purchased from Shanghai Titan Technology Co., Ltd. with a specification of 800 mesh.

[0044] In embodiment and comparative example, the N that adopts 2 The fixed amount is 0.008g / g LDPE, and this N can be adjusted arbitrarily in actual production 2 fixed amount, then CO 2 According to N 2 The amount of addition can be according to a certain ratio.

Embodiment 1

[0046] A kind of EPE pearl cotton material, by weight, it comprises following component:

[0047] 100 parts of LDPE resin pellets, 1.5 parts of mixed foaming agent; wherein, the mixed foaming agent is 0.7 parts of carbon dioxide and 0.8 parts of nitrogen, and the weight of nitrogen accounts for 55% of the total weight of the mixed foaming agent.

[0048] It is prepared by the following method:

[0049] Heat the extrusion foaming machine to heat up; add LDPE pellets, talc powder and mixed foaming agent to the extrusion foaming machine, and after mixing thoroughly, extrude through the die, cool, shape, flatten, pull, and coil That's it. In this example, N 2 The fixed addition amount is 0.008g / g LDPE; CO 2 The added amount is 0.007g / g LDPE.

[0050] Example 2

[0051] A kind of EPE pearl cotton material, by weight, it comprises following component:

[0052] 100 parts of LDPE resin pellets, 0.7 parts of talcum powder, and 2.2 parts of mixed foaming agent; wherein, the mixed ...

Embodiment 3

[0057] A kind of EPE pearl cotton material, by weight, it comprises following component:

[0058] 100 parts of LDPE resin pellets, 2.8 parts of mixed blowing agent; wherein, the mixed blowing agent is 2 parts of carbon dioxide and 0.8 part of nitrogen, and the weight of nitrogen accounts for 29% of the total weight of the mixed blowing agent.

[0059] It is prepared by the following method:

[0060] Heat the extrusion foaming machine to heat up; add LDPE pellets, talc powder and mixed foaming agent to the extrusion foaming machine, and after mixing thoroughly, extrude through the die, cool, shape, flatten, pull, and coil That's it. In this example, N 2 The fixed addition amount is 0.008g / g LDPE; CO 2 The added amount is 0.020g / g LDPE.

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Abstract

The invention discloses a raw material composition, an EPE pearl wool material and a preparation method thereof. The raw material composition comprises the following components in parts by weight: 100 parts of LDPE resin granules and 1-10 parts of a mixed foaming agent, wherein the mixed foaming agent comprises a mixture of carbon dioxide and nitrogen, and the weight of the nitrogen accounts for 20%-55% of the total weight of the mixed foaming agent. According to the invention, only 100% LDPE is adopted as a base material, the foaming temperature range is relatively wide, and under the condition that other blended resin materials and nucleating agents are not needed, proper types and proportions of mixed foaming agents are selected and matched with other necessary technical characteristics, and the EPE pearl wool material which is not shrunk, compact and uniform in foam hole, high in multiplying power and good in product performance can be prepared.

Description

technical field [0001] The invention relates to packaging materials, in particular to a raw material composition, EPE pearl cotton material and a preparation method thereof. Background technique [0002] EPE pearl cotton is a non-cross-linked closed-cell structure, usually made of low-density polyethylene (LDPE) foamed with butane as a physical foaming agent. It has the properties and advantages of shock resistance, sound insulation, heat insulation, water and moisture resistance, and is widely used Applied to sound insulation, heat insulation materials, thermal insulation materials, life-saving materials in industrial production, as well as internal and external packaging of household appliances, computers, audio, handicrafts, fragile gifts, etc. EPE pearl cotton not only has a lot of advantages, but also its waste can be recycled repeatedly without polluting the environment. It is a new type of environmentally friendly packaging material. With the advancement of technolog...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L23/06C08K3/34C08K3/36C08K3/04C08K3/26
CPCC08J9/122C08J9/0066C08J2323/06C08J2203/06C08J2203/182C08J2205/052C08K3/34C08K3/36C08K3/041C08K2003/265Y02W30/80
Inventor 刘涛张洪高波曹志怀金耿
Owner EAST CHINA UNIV OF SCI & TECH
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