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Preparation method of polypropylene homogeneous fiber composite foaming material

A technology of polypropylene fiber and foaming material, which is applied in the field of preparation of polypropylene foaming material and fiber reinforced polypropylene foaming material, can solve the problems of poor foaming performance and low melt strength of polypropylene, and achieve foam cell Uniform distribution, reduced cell diameter, and improved foaming performance

Inactive Publication Date: 2021-05-07
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the existing production technology, the present invention provides a polypropylene homogeneous fiber composite foaming material in order to solve the problems of low polypropylene melt strength and poor foaming performance as well as the compatibility between the polypropylene matrix and the reinforcement. Preparation method, the method is as follows:

Method used

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  • Preparation method of polypropylene homogeneous fiber composite foaming material
  • Preparation method of polypropylene homogeneous fiber composite foaming material
  • Preparation method of polypropylene homogeneous fiber composite foaming material

Examples

Experimental program
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Embodiment 1

[0026] Weigh random polypropylene according to mass percentage: polypropylene fiber = 95:5, put the weighed material in an oven and dry it at 60°C for 6 hours, and then add the dried material into the internal mixer in two batches Physical blending in the middle, the first batch of materials added is atactic polypropylene, the temperature of the mixing chamber is set to 165 °C, the mixing time is set to 6min, the second batch of materials added is polypropylene fiber, the temperature of the mixing chamber is set to The temperature is 150°C, the mixing time is set to 6min, and the screw speed remains constant at 50rpm during the mixing process. After the mixing, the obtained binary composite material was crushed and placed in a mold for hot-press molding to prepare a foamed sample. The hot-press temperature was set at 155°C and the hot-press pressure was set at 10 MPa. Set to 12min. The hot-pressed sample is placed in a reaction kettle, using supercritical carbon dioxide as a ...

Embodiment 2

[0028] Weigh random polypropylene according to mass percentage: polypropylene fiber = 90:10, put the weighed material in an oven and dry it at 60°C for 6 hours, and then add the dried material into the internal mixer in two batches Physical blending in the middle, the first batch of materials added is atactic polypropylene, the temperature of the mixing chamber is set to 165 °C, the mixing time is set to 6min, the second batch of materials added is polypropylene fiber, the temperature of the mixing chamber is set to The temperature is 150°C, the mixing time is set to 6min, and the screw speed remains constant at 50rpm during the mixing process. After the mixing, the obtained binary composite material was crushed and placed in a mold for hot-press molding to prepare a foamed sample. The hot-press temperature was set at 155°C and the hot-press pressure was set at 10 MPa. Set to 12min. The hot-pressed sample is placed in a reaction kettle, using supercritical carbon dioxide as a...

Embodiment 3

[0030] Weigh random polypropylene by mass percentage: polypropylene fiber = 80:20, place the weighed material in an oven and dry it at 60°C for 6 hours, then add the dried material into the internal mixer in two batches Physical blending in the middle, the first batch of materials added is atactic polypropylene, the temperature of the mixing chamber is set to 165 °C, the mixing time is set to 6min, the second batch of materials added is polypropylene fiber, the temperature of the mixing chamber is set to The temperature is 150°C, the mixing time is set to 6min, and the screw speed remains constant at 50rpm during the mixing process. After the mixing, the obtained binary composite material was crushed and placed in a mold for hot-press molding to prepare a foamed sample. The hot-press temperature was set at 155°C and the hot-press pressure was set at 10 MPa. Set to 12min. The hot-pressed sample is placed in a reaction kettle, using supercritical carbon dioxide as a foaming age...

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Abstract

The invention discloses a preparation method of a polypropylene homogeneous fiber composite foaming material. The foaming material is composed of a polypropylene matrix and polypropylene fibers, a physical melt blending method is adopted to prepare composite materials with different contents of fibers, and a to-be-foamed sample strip of the composite materials is prepared through hot press molding. The sample strip is put into a high-pressure reaction kettle, and the polypropylene homogeneous fiber composite foaming material is prepared by adopting a batch foaming method. The method disclosed by the invention is low in equipment requirement, simple to operate, low in material cost and recyclable, the preparation process is green and environment-friendly, and the prepared foaming material is excellent in mechanical property, convenient for industrial production and wide in application prospect.

Description

Technical field: [0001] The invention belongs to the field of foaming materials, and in particular relates to a polypropylene foaming material and a preparation method of a fiber-reinforced polypropylene foaming material. Background technique: [0002] Polypropylene foam material is a kind of microporous structure material with excellent performance. It has good thermal stability, impact resistance, low cost and can be recycled. These excellent characteristics make it the fastest growing new type in recent years. Eco-friendly cushioning insulation. However, due to the linear molecular structure of polypropylene, its melt strength is too low, cell rupture and merger are prone to occur, and it is difficult to prepare polypropylene foam materials with ideal cell structure. In order to improve the foaming properties of polypropylene, researchers add various fillers when preparing polypropylene foam materials, but the presence of these fillers makes polypropylene materials diffi...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08L23/12
CPCC08J9/122C08J9/0061C08J9/0085C08J2203/06C08J2203/08C08J2323/12C08J2423/12C08J2205/044
Inventor 陈静波张晓黎魏豫恒左凯龙杨扬徐建伟王阳正
Owner ZHENGZHOU UNIV