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Polypropylene composite material as well as preparation method and application thereof

A composite material, polypropylene technology, applied in the field of polypropylene composite materials and preparation, to achieve the effects of improving melt elasticity, outstanding cooling and shaping ability, outstanding melt flow stability and melt viscoelasticity

Active Publication Date: 2022-06-28
CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the appearance defects of rib marks and stress marks in the existing polypropylene composition material when injection molding plastic parts, and to provide a polypropylene composite material through which the main resin of the high-flow polypropylene material Good fluidity, combined with high-molecular-weight copolymerized polypropylene to improve melt elasticity, and adding high-molecular-weight ethylene-propylene multi-block copolymer to improve the dispersion effect of elastomers, and finally eliminate the appearance defects of rib marks and stress marks in injection molded parts , and at the same time reach the balance of rigidity and toughness

Method used

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  • Polypropylene composite material as well as preparation method and application thereof
  • Polypropylene composite material as well as preparation method and application thereof
  • Polypropylene composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1～8

[0072] A polypropylene composite material, in parts by weight, includes the components shown in Table 2 below.

[0073] Table 2

[0074]

[0075] The preparation method of the above-mentioned polypropylene composite material comprises the following steps:

[0076] According to the weight parts of each component in Table 2, the components were mixed uniformly in the mixing equipment, and then added to a twin-screw extruder with a length-to-diameter ratio of 40:1, and melt-kneaded at a temperature of 200 ° C. Then granulation, cooling and drying give polypropylene composition.

[0077] Under the conditions of injection temperature of 200°C, injection pressure of 45MPa, injection speed of 45m / s, holding pressure of 30MPa, and holding time of 5s, respectively, a mesh with a size of 200mm*200mm*2mm on the back with 10mm*10mm mesh was obtained by injection molding. Reinforced plastic square plate, size 200mm*200mm, plastic light plate with thickness from 1mm to 3mm, and ISO sta...

Embodiment 9

[0079] A polypropylene composite material, in parts by weight, comprising the same components as in Example 5, except that polypropylene is a mixture of PP-1-A and PP-2-B, and PP-1-A and The weight ratio of PP-2-B is 1:1.

Embodiment 10

[0081] A polypropylene composite material, in parts by weight, comprising the same components as in Example 5, except that polypropylene is a mixture of PP-1-B and PP-2-C, and PP-1-B and The weight ratio of PP-2-C is 1:1.

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Abstract

The invention discloses a polypropylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polypropylene composite material comprises the following components in parts by weight: 20-120 parts of polypropylene and 5-40 parts of filler, 0-30 parts of an elastomer; and 2-10 parts of a high molecular weight ethylene-propylene multi-block copolymer. According to the polypropylene composite material disclosed by the invention, a high-flowability polypropylene material is taken as main body resin, and high-molecular-weight co-polypropylene with high rubber phase viscosity is added, so that the effect of obviously improving the melt elasticity can be achieved, and good dispersion of an elastomer in two kinds of special polypropylene resin can be realized; the obtained polymer melt has prominent rapid high crystallinity and prominent melt flow stability and melt viscoelasticity, so that the apparent defects of rib position marks and stress marks are well eliminated, and the rib position mark rating and the stress mark rating can both reach the first-level standard.

Description

technical field [0001] The invention relates to the technical field of polymer materials, and more particularly, to a polypropylene composite material and a preparation method and application thereof. Background technique [0002] In recent years, with the development of the automobile industry, more and more plastic materials have been used in the interior and exterior of automobiles. Among them, polypropylene materials have become more popular in automobiles due to their excellent comprehensive properties, wide sources, high quality and low price. Use a larger proportion of plastic. With the improvement of people's living standards, consumers pay more and more attention to details such as the appearance of interior and exterior trim parts of automobiles. The standard for the appearance evaluation of interior and exterior trim parts by auto OEMs is that there are no obvious appearance defects on the surface. Skin texture is a common concern, and now it is also very concern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/14C08L23/12C08L53/00C08K3/34
CPCC08L23/0815C08L23/14C08L23/12C08L53/00C08K3/34
Inventor 陈锐陈延安吴国峰王林
Owner CHENGDU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD