Glass fiber reinforced polypropylene composite material and its preparation method and application thereof

A composite material and polypropylene technology, applied in the field of modified plastics, can solve serious problems, such as glass fiber reinforced polypropylene is not easy to spray sink marks, and achieve low shrinkage, increased cooling and solidification speed, and good compatibility.

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

AI Technical Summary

Problems solved by technology

[0005] 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 composite material that is easy to spray and has shallow sink marks

Method used

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  • Glass fiber reinforced polypropylene composite material and its preparation method and application thereof
  • Glass fiber reinforced polypropylene composite material and its preparation method and application thereof
  • Glass fiber reinforced polypropylene composite material and its preparation method and application thereof

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Embodiment 1～6

[0038] A kind of easy to spray, shallow sink mark glass fiber reinforced polypropylene composite material, its raw material formula is as shown in table 1, and its preparation method comprises the following steps:

[0039] 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 composite material that is easy to spray and has shallow sink marks can be obtained.

[0040] 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 melt index of polypropylene grafted maleic anhydride is 80g / min (230°C, 2.16kg), the grafting rate is 0.8%, the length of the c...

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Abstract

The invention belongs to the technical field of modified plastics and discloses a glass fiber reinforced polypropylene composite material which is easy to spray and has shallow shrink mark and a preparation method and an application thereof. The composite material includes the following components: by weight, 45-79% of polypropylene, 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. With the addition of short-cut glass fiber and the mineral filler, the obtained glass fiber reinforced polypropylene composite material has better mechanical property. The composite material is applied to household appliances and automobile industry, can be used to replace engineering plastics. By the adoption of high-crystallinity polypropylene, cooling and solidification speed during the injection molding process of the material is raised effectively, and the surface of a finished product has characteristics of shallow shrink mark, low warpage and high surface glossiness. In addition, the product has advantages of high bending strength and flexural modulus, good processability, low cost, high dyne index and good printing-ink wellability.

Description

technical field [0001] The invention belongs to the technical field of modified plastics, and in particular relates to a glass fiber reinforced polypropylene composite material which is easy to spray and has shallow sink marks, and a preparation method and application thereof. 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, which increases the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/06C08K13/04C08K7/14B29B9/06B29C47/92B29C48/92
CPCB29B9/14B29B7/46B29B7/72B29B7/90B29B9/06B29B9/12C08L23/12B29C48/92B29C2948/92704C08K2201/003C08K2201/004C08L2205/025C08L2205/035C08L23/14C08L51/06C08L63/00C08K13/04C08K7/14C08K2003/265C08K2003/3045C08K3/34
Inventor 李聪李建军陈国雄陶四平宋晓东李晟李欣钱永红
Owner TIANJIN KINGFA NEW MATERIAL
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