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Process for forming thermoplastic elastomer/filler composite foam material

A thermoplastic elastomer and compound foaming technology, which is applied in the field of composite materials, can solve the problems of poor dispersion of fillers, and achieve the effects of good dispersion, excellent overall performance, and high elasticity

Inactive Publication Date: 2017-09-05
HUBEI UNIV FOR NATITIES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product has excellent performance and the filler is uniformly dispersed, which solves the problem of poor filler dispersion in traditional composite products

Method used

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  • Process for forming thermoplastic elastomer/filler composite foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put the polyurethane elastomer and disperse dye Disperse Red 343 in the autoclave body, feed carbon dioxide and pressurize to make the pressure reach 30Mpa and the temperature is 60°C. At this time, the carbon dioxide is in a supercritical state. In this state, pressurize and infiltrate for 3 hours, and control the process to release the pressure slowly so that the dispersible filler in the base material does not mix with CO 2 Discharged and evenly dispersed in the polyurethane elastomer. After pressure relief, the polyurethane elastomer / dyed filler was foamed at 100° C. for 10 minutes to obtain a dyed polyurethane elastomer foam material. Put the dyed polyurethane elastomer foam material into the mold cavity heated to 150°C from the material gun, and then feed high-pressure steam with a steam pressure of 0.3MPa. At this time, close the condensate valve on one side, open the steam inlet valve, and at the same time , so that the steam inlet valve on the opposite side is...

Embodiment 2

[0028] Put the polyurethane elastomer and disperse dye Disperse Red 343 in the autoclave body, feed carbon dioxide and pressurize to make the pressure reach 30Mpa and the temperature is 60°C. At this time, the carbon dioxide is in a supercritical state. In this state, pressurize and infiltrate for 3 hours, and control the process to release the pressure slowly so that the dispersible filler in the base material does not mix with CO 2 Discharged and evenly dispersed in the polyurethane elastomer. After pressure relief, the polyurethane elastomer / dyed filler was foamed at 120° C. for 6 minutes to obtain a dyed polyurethane elastomer foam material. Put the dyed polyurethane elastomer foam material into the mold cavity heated to 150°C from the material gun, and then feed high-pressure steam with a steam pressure of 0.3MPa. At this time, close the condensate valve on one side, open the steam inlet valve, and at the same time , so that the steam inlet valve on the opposite side is ...

Embodiment 3

[0032] The polyurethane elastomer and the dispersive filler graphene are placed in the autoclave body, and carbon dioxide is introduced and pressurized, so that the pressure reaches 40Mpa and the temperature is 55°C, and the carbon dioxide is in a supercritical state at this time. In this state, keep the pressure and infiltrate for 4 hours, and control the process to release the pressure slowly, so that the dispersed filler graphene in the base material will not be mixed with CO 2Discharged and evenly dispersed in the polyurethane elastomer. After the pressure relief, the polyurethane elastomer / graphene was foamed at 110°C for 2 minutes to obtain a polyurethane elastomer / graphene foam material. Put the foaming material into the mold cavity heated to 170°C from the material gun, and then feed high-pressure steam with a steam pressure of 0.4 MPa. At this time, close the condensate valve on one side and open the steam inlet valve. The steam inlet valve is closed and the condensa...

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Abstract

The invention belongs to the field of composite materials and in particular relates to a process for forming a thermoplastic elastomer / filler composite foam material through a supercritical CO2 technology. The forming process comprises the following steps: adding a thermoplastic elastomer and a filler into an autoclave body, introducing CO2 to enable the pressure in the autoclave to be higher than 7.38Mpa and enable the temperature to be higher than 31 DEG C, permeating for a period of time and then relieving pressure; rapidly putting the prepared thermoplastic elastomer / filler composite material into foaming equipment, heating and foaming so as to prepare foam particles; and performing steam compression molding on the foam particles, thereby obtaining the thermoplastic elastomer / filler composite foam product. The product is excellent in performance, the filler is uniformly dispersed, and the problem that the filler in the traditional composite material product is poor in dispersion property is solved.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a 2 Technology The molding process for preparing thermoplastic elastomer / filler composite foaming materials. Background technique [0002] Blending thermoplastic elastomer materials with fillers can not only significantly improve the performance of thermoplastic elastomer materials, but also greatly reduce the cost of thermoplastic elastomer material development and development. But the premise is that the filler can be incorporated into the matrix to deagglomerate and evenly disperse during the process of mixing with the elastomer. However, due to the poor mutual affinity between the elastomer material and the filler, the dispersion of the filler using the traditional melt blending method is poor, and these filler particles are easy to agglomerate in the elastomer matrix, making the performance of mixing the two It cannot reach the level that is theoretically pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12B29C44/60C08L75/04C08L53/02C08L23/08C08L101/00
CPCB29C44/60C08J9/0033C08J9/0066C08J9/122C08J2203/06C08J2203/08C08J2300/00C08J2353/02C08J2375/04C08J2423/08
Inventor 秦柳李强徐灵钢
Owner HUBEI UNIV FOR NATITIES
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