Polypropylene open-cell foaming material and preparing process thereof

A porous material, polypropylene technology, applied in the field of polypropylene foamed open-cell material and its preparation, can solve the problems of flammability, explosion, environmental impact, etc., and achieve the effects of environmental friendliness, low cost, and wide source of raw materials

Inactive Publication Date: 2008-10-01
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses fluorine-containing foaming agent, which has an impact on the environment, or uses alkane foaming agent, which has the disadvantages of being flammable and explosive, so it has limitations in actual production

Method used

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  • Polypropylene open-cell foaming material and preparing process thereof
  • Polypropylene open-cell foaming material and preparing process thereof
  • Polypropylene open-cell foaming material and preparing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Put 97 parts of resin matrix, 1 part of talc powder with an average particle size of 0.8 μm, and 2 parts of glycerol monostearate into a high-speed mixer and mix thoroughly, wherein the resin matrix is ​​made of 99 parts of polypropylene resin (F401 of Panjin Petrochemical, The melt flow rate (MFR) is 2.0g / 10min, measured according to the standard ISO1133:1997) and 1 part of ultra-high molecular weight polyethylene with a weight average molecular weight of 5 million;

[0040] 2) Put the mixture obtained in step 1) into a twin-screw extruder with a screw diameter of 32mm and an aspect ratio of 48 through the feeding port. The temperatures of each section of the extruder are 150°C, 170°C, 180°C, 190°C, and 190°C. , 200°C, 200°C, extruding strips through a circular die, cooling with water, and cutting into pellets to obtain a polypropylene resin composition;

[0041] 3) Add the polypropylene resin composition obtained in step 2) into a twin-screw extruder with a screw d...

Embodiment 2

[0046] 1) Put 95 parts of resin matrix, 2 parts of talcum powder with an average particle size of 0.8 μm, and 3 parts of glycerol monostearate into a high-speed mixer and mix thoroughly, wherein the resin matrix is ​​made of 92 parts of polypropylene resin (Qilu Petrochemical Copolymerized Polypropylene EP2S34F, melt flow rate (MFR) is 1.8g / 10min, measured according to standard ISO1133:1997), 3 parts of ultra-high molecular weight polyethylene with a weight average molecular weight of 4 million and 5 parts of EPDM rubber (Jilin Petrochemical J3080) composition;

[0047] 2) Put the mixture obtained in step 1) into a twin-screw extruder with a screw diameter of 32mm and an aspect ratio of 48 through the feeding port. The temperatures of each section of the extruder are 150°C, 170°C, 180°C, 190°C, and 190°C. , 200°C, 200°C, extruding strips through a circular die, cooling with water, and cutting into pellets to obtain a polypropylene resin composition;

[0048] 3) Add the polypr...

Embodiment 3

[0052] 1) Put 95 parts of resin matrix, 2 parts of talcum powder with an average particle size of 0.8 μm, and 3 parts of glycerol monostearate into a high-speed mixer and mix thoroughly, wherein the resin matrix is ​​made of 90 parts of polypropylene resin (Qilu Petrochemical Copolymerized Polypropylene EP2S34F, melt flow rate (MFR) is 1.8g / 10min, measured according to standard ISO1133:1997), 5 parts of ultra-high molecular weight polyethylene with a weight average molecular weight of 3 million and 5 parts of EPDM rubber (Jilin Petrochemical J3080) composition;

[0053] 2) Put the mixture obtained in step 1) into a twin-screw extruder with a screw diameter of 32mm and an aspect ratio of 48 through the feeding port. The temperatures of each section of the extruder are 150°C, 170°C, 180°C, 190°C, and 190°C. , 200°C, 200°C, extruding strips through a circular die, cooling with water, and cutting into pellets to obtain a polypropylene resin composition;

[0054] 3) Add the polypr...

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Abstract

The invention relates to a polypropylene foaming material for opening aperture and a preparation method thereof, which pertains to the polymeric material field and aims at solving the disadvantages of the existing foaming material for opening aperture of high technological cost, difficulty in recovery, environmental pollution and complicated operation. The foaming material of the invention consists essentially of polypropylene resin composition, and the composition consists of polypropylene A with a melt flow velocity of 0.01 to 10g/10min, polyethylene B with an Mw of 600,000 to 5,000,000, a compatilizer C and a normal additive; the additive accounts for no more than 10 weight percent, and B accounts for 1 to 40 weight percent while C accounts for 0 to 5 weight percent in the mixture of A, B and C. The composition is heated over the molten temperature thereof in the invention, a physical foaming agent with 1 to 20 percent of the melt in weight is injected under the pressure larger than the pressure of the melt, then the mixture is exposed under the environment with a pressure lower than the pressure of the composition melt, thus the polypropylene foaming material for opening aperture is prepared. The invention has the advantages of low cost, simple operation, no pollution, uniform and unblocked foam pores, and the opening percentage of at least 50 percent.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a polypropylene foamed open-cell material and a preparation process thereof. The polypropylene foamed open-cell material provided by the invention can be widely used in microfiltration materials in the food industry and medical and health fields, and water-absorbing, sound-absorbing and shock-resistant materials in the packaging industry. Background technique [0002] Polymer foamed open-cell materials include polyurethane foam, rubber foam and EVA foam, etc., because of their flexibility and ease of processing, they are widely used as cleaning sponges, shock-resistant materials, cushion materials, sound-absorbing materials and various filters. Material. However, because these foams themselves have poor chemical resistance (acid resistance, alkali resistance) and weather resistance, in addition, polyurethane and foam rubber are difficult to recycle, and EVA fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08J9/12
Inventor 信春玲何亚东付中玉李晓宁李庆春闫宝瑞杨中开李青
Owner BEIJING UNIV OF CHEM TECH
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