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Modified micropore foaming polypropylene material and preparation method thereof

A polypropylene material and microcellular foaming technology, which is applied in the field of polymer processing, can solve problems such as high cost and increase production equipment, and achieve the effects of low production cost, improved melt strength, and dense cell structure.

Inactive Publication Date: 2013-09-04
FUJIAN JINJIANG JINYI SHOES MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Before the solid-phase grafting polypropylene is molded and foamed, ordinary polypropylene resin monomers such as maleic anhydride are branched to obtain polypropylene resins with high melt viscosity, and then Carry out molding and foaming process, which increases production equipment and costs high

Method used

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  • Modified micropore foaming polypropylene material and preparation method thereof
  • Modified micropore foaming polypropylene material and preparation method thereof
  • Modified micropore foaming polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of modified microcellular foamed polypropylene material comprises the following steps:

[0049] The formula is as follows:

[0050]

[0051] Put the above-mentioned raw and auxiliary materials into the internal mixer for internal mixing, the temperature is 130°C, and the internal mixing time is 12 minutes. Put the internally mixed material on a two-roller open mixer at 115°C for a thick pass, and then make triangular bags for three times. After the materials are evenly mixed Immediately out of the sheet, cut a 24cm×24cm sheet, weigh 1095g of the sheet and place it in a 25cm×25cm×2.3cm mold, close the mold and heat for 38min under a steam pressure of 0.65MPa to make the material in the mold cross-linked and foamed , the microcellular foamed polypropylene material is obtained by unloading the oil pressure and opening the mold. The physical properties of the tested foamed material are as follows:

[0052]

Embodiment 2

[0054] A preparation method of modified microcellular foamed polypropylene material comprises the following steps:

[0055] The formula is as follows:

[0056]

[0057] Put the above-mentioned raw and auxiliary materials into the internal mixer for internal mixing, the temperature is 130°C, and the internal mixing time is 12 minutes. Put the internally mixed material on a two-roller open mixer at 120°C for a thick pass once, and then make triangular bags for three times. After the materials are evenly mixed Take out the sheet, cut the sheet into a 24cm×24cm sheet, weigh 1095g of the sheet and place it in a 25cm×25cm×2.3cm mold, close the mold and heat for 38min under a steam pressure of 0.65MPa to make the material in the mold cross-linked Foam, release the oil pressure and open the mold to get the microcellular foamed polypropylene material Test the physical properties of the foamed material as follows:

[0058]

Embodiment 3

[0060] A preparation method of modified microcellular foamed polypropylene material comprises the following steps:

[0061] The formula is as follows:

[0062]

[0063] Put the above-mentioned raw and auxiliary materials into the internal mixer for internal mixing, the temperature is 130°C, and the internal mixing time is 12 minutes. Put the internally mixed material on a two-roller open mixer at 120°C for a thick pass once, and then make triangular bags for three times. After the materials are evenly mixed Take out the sheet, cut the sheet into a 24cm×24cm sheet, weigh 1095g of the sheet and place it in a 25cm×25cm×2.3cm mold, close the mold and heat for 38min under a steam pressure of 0.65MPa to make the material in the mold cross-linked Foam, release the oil pressure and open the mold to get the microcellular foamed polypropylene material Test the physical properties of the foamed material as follows:

[0064]

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PUM

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Abstract

The invention discloses a modified micropore foaming polypropylene material and the preparation method thereof, and relates to a superpolymer processing method. The modified micropore foaming polypropylene material comprises the following ingredients in weight parts: 60-80 parts of polypropylene, 20-40 parts of modifier, 1.2-1.5 parts of cross-linking agent, 1.0-1.5 parts of auxiliary cross-linking agent, 1.5-2.5 parts of foaming agent, 1.0-4.0 parts of auxiliary foaming agent, 10-30 parts of nucleating agent, and 0.5 part of stearic acid. The preparation method comprises the following steps: all raw and auxiliary materials are put into an internal mixer for mixing; the mixed material is caused to pass through a two-roll open mill and is then packed in triangular package; the material is uniformly mixed; the material in sheet form is then sliced into sheets; the sheets sliced according to specification are placed into a preheated mould; the mould is closed; and the modified micropore foaming polypropylene material is obtained after pressure release and mould opening. The further cross-link foaming mould pressing method is adopted, so that the manufacture process is simple and feasible, the manufacture cost is low, and the method is suitable for popularization and application; and the structure of the bubble holes of the prepared modified micropore foaming polypropylene material is compact and uniform, and the prepared modified micropore foaming polypropylene material has a good hand feeling and good physical properties.

Description

technical field [0001] The invention relates to a high polymer processing method, in particular to a modified microporous foamed polypropylene material and a preparation method thereof. Background technique [0002] In 2011, the total mass of polypropylene in my country reached 9.805 million tons, an increase of 8.8% year-on-year, which was faster than polyethylene (polyethylene increased by 7.4% year-on-year in 2011), becoming the second among the five general-purpose plastics in my country. Due to the microcellular foaming PP Plastics have the following properties: [0003] 1) Excellent heat resistance up to 120°C. [0004] 2) Excellent mechanical properties. [0005] 3) Good thermal insulation. [0006] 4) It has high impact energy absorption capacity and good resilience. [0007] 5) Good resistance to stress cracking. [0008] 6) Compared with expanded polystyrene, it has less smoke and no toxicity when burned. [0009] 7) The degradation performance is better than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08J9/10C08J3/24C08K13/02C08K5/14C08K5/3492C08K3/22C08K5/098C08K3/26B29C69/02B29C44/02B29C43/24B29B7/02
Inventor 黄礼寿黄臻恺
Owner FUJIAN JINJIANG JINYI SHOES MATERIAL
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