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Glass fiber reinforced polypropylene/polystyrene alloy composite material and its preparation and application thereof

A polystyrene and composite material technology, applied in the field of modified plastics, can solve the problem of difficult spraying sink marks, serious problems, etc., and achieve the effects of improving the cooling and solidification speed, improving the dyne index, and having no flow marks on the surface.

Active Publication Date: 2014-02-19
TIANJIN KINGFA NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of glass fiber reinforced polypropylene in the prior art that are not easy to spray and serious sink marks, the primary purpose of the present invention is to provide a glass fiber reinforced polypropylene / polystyrene alloy composite that is easy to spray and has shallow sink marks. Material

Method used

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  • Glass fiber reinforced polypropylene/polystyrene alloy composite material and its preparation and application thereof
  • Glass fiber reinforced polypropylene/polystyrene alloy composite material and its preparation and application thereof
  • Glass fiber reinforced polypropylene/polystyrene alloy composite material and its preparation and application thereof

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Embodiment 1～6

[0041] A kind of easy to spray, shallow sink mark glass fiber reinforced polypropylene / polystyrene alloy composite material, its raw material formula is as shown in table 1, and its preparation method comprises the following steps:

[0042] Mix raw materials other than chopped glass fiber and feed from the main feed port of the twin-screw extruder; chopped glass fiber is fed from the side feed port of the twin-screw extruder; raw materials are fed in the extruder After melting, extruding and granulating, a glass fiber reinforced polypropylene / polystyrene alloy composite material that is easy to spray and has shallow sink marks can be obtained.

[0043] In Table 1, the melt index of homopolypropylene is 5g / min (230°C, 2.16kg), the melt index of copolymerized polypropylene tree is 50g / min (230°C, 2.16kg), and the melt index of high crystalline polypropylene is 15g / min (230°C, 2.06kg), the polystyrene is GPPS-123P (Shanghai Secco), the melt index of polypropylene grafted maleic a...

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Abstract

The invention belongs to the technical field of modified plastics and discloses a glass fiber reinforced polypropylene / polystyrene alloy composite material which is easy to spray and has shallow shrink mark and a preparation method and an application thereof. The alloy composite material includes the following ingredients: by weight, 40-69% of polypropylene, 10-30% of polystyrene, 15-30% of short-cut glass fiber, 1-20% of a mineral filler, 2-5% of graft polypropylene and 1-2% of a spray improver. By the adoption of high-crystallinity polypropylene, cooling and solidification speed during the injection molding process is raised effectively, and the surface of a finished product has characteristics of shallow shrink mark, low warpage and high surface glossiness. In addition, dyne index is high, and printing-ink wellability is good. With the addition of short-cut glass fiber and the mineral filler, the composite material has better mechanical property. The composite material is applied to household appliances and automobile industry, can be used to replace engineering plastics, and also meets requirements of products which highly require dimensional stability, warpage and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of modified plastics, and in particular relates to a glass fiber-reinforced polypropylene / polystyrene alloy composite material which is easy to spray and has shallow sink marks, as well as its preparation method and application. Background technique [0002] Glass fiber reinforced polypropylene has the advantages of high mechanical strength, good heat resistance, chemical corrosion resistance, dimensional stability, etc. It is widely used in household appliances, automobiles, machinery and other fields. The strength and modulus of glass fiber reinforced polypropylene are comparable to engineering plastics, which further expands the application prospects of reinforced polypropylene. However, due to the low polarity of the polypropylene material itself and the low surface dyne index, it is necessary to add chlorinated polypropylene for pretreatment during the spraying process to increase its surface polarity, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L25/06C08L51/06C08K13/04C08K7/14B29B9/06B29C47/92B29C48/92
CPCB29B9/14B29B7/46B29B7/72B29B7/90B29B9/06B29B9/12C08L23/12B29C48/92B29C2948/92704C08K2201/003C08K2201/004C08L23/14C08L25/06C08L2205/025C08L2205/035C08L51/06C08L63/00C08K13/04C08K7/14
Inventor 李聪李东李欣宋晓东张春怀肖华明聂德林刘乐文
Owner TIANJIN KINGFA NEW MATERIAL
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