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Low-linear thermal expansion coefficient, flocking effect polypropylene composite material and preparation method thereof

A technology of thermal expansion coefficient and composite material, which is applied in the field of low linear thermal expansion coefficient, flocking-like polypropylene composite material and its preparation field, can solve the problems of easy warping and deformation of parts, affecting the appearance of parts, cumbersome processing process, etc. Achieve the effect of reducing post shrinkage and linear thermal expansion coefficient, improving comprehensive performance, and simple preparation process

Inactive Publication Date: 2018-06-01
CHONGQNG PRET NEW MATERIAL +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing process of this kind of method is cumbersome, and the parts are easy to warp and deform. At the same time, the glass fiber is easy to be exposed, which affects the appearance of the part.
There are also patents to reduce the linear thermal expansion coefficient of composite materials by adding long whiskers, special talcum powder with high thickness-to-diameter ratio, and special elastomers, such as patents CN105504528A, CN106674742A, etc., but these fillers are expensive and the products are stronger. The plastic feeling cannot be effectively improved

Method used

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  • Low-linear thermal expansion coefficient, flocking effect polypropylene composite material and preparation method thereof
  • Low-linear thermal expansion coefficient, flocking effect polypropylene composite material and preparation method thereof
  • Low-linear thermal expansion coefficient, flocking effect polypropylene composite material and preparation method thereof

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Embodiment 1

[0032] The main components of the polypropylene composite material of the present invention include 80.6% polypropylene, 5% talc, 5% acicular wollastonite, 0.5% cellulose, 5% elastomer, 0.5% compatibilizer, 0.1% antioxidant 3314 , 0.1% antioxidant DSTP and 0.2% secondary antioxidant 168 and 2% other additives.

Embodiment 2

[0034] The main components of the polypropylene composite material of the present invention include 72.6% polypropylene, 5% talc, 10% acicular wollastonite, 1.0% cellulose, 8% elastomer, 1.0% compatibilizer, 0.1% antioxidant 3314 , 0.1% antioxidant DSTP and 0.2% secondary antioxidant 168 and 2% other additives.

Embodiment 3

[0036] The main components of the polypropylene composite material of the present invention include 67.6% polypropylene, 5% talc, 15% acicular wollastonite, 1.0% cellulose, 8% elastomer, 1.0% compatibilizer, 0.1% antioxidant 3314 , 0.1% antioxidant DSTP and 0.2% secondary antioxidant 168 and 2% other additives.

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Abstract

The invention discloses a low linear thermal expansion coefficient, a flocking effect polypropylene composite material and a preparation method thereof. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 45 to 90 of polypropylene, 0 to 15 of talc powder, 5 to 15 of acicular wollastonite, 0.2 to 5 of cellulose, 1 to 15 of elastomer, 0.5 to 2 of compatilizer, 0.1 to 1 of antioxidant, 0 to 2 of other additives. According to the low linear thermal expansion coefficient, the flocking effect polypropylene composite material and the preparationmethod thereof, high aspect ratio acicular wollastonite and the cellulose are adopted to replace part or all of the talc powder for compounding and filling, and are added into an extruder through a side feeding method, so that the structures of the acicular wollastonite and the cellulose are maintained farthest, the post-shrinkage and linear thermal expansion coefficient of the composite materialare greatly reduced, a stronger plastic feel of the composite material is improved, and the material has a flocking effect, can be widely used in automotive interior trim parts such as automotive pillars, door panels, and instrument panels.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to a polypropylene composite material with low linear thermal expansion coefficient and imitation flocking effect and a preparation method thereof. It is a polypropylene composite material with simple process and low cost, and has a relatively low It has the advantages of linear thermal expansion coefficient and excellent imitation flocking effect, and the comprehensive performance of the composite material is excellent. It can be widely used in the field of automotive interior parts such as odor pillars, door panels and instrument panels, and belongs to the field of polymer modification and processing technology. Background technique [0002] Polypropylene is widely used in industries such as automotive interior and exterior trims, household appliances and electronic components because of its good molding performance, excellent oil resistance and chemical resistance, light weigh...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L1/02C08L23/08C08L51/06C08K13/04C08K7/10C08K3/34B29C47/92B29B9/06B29C48/92
Inventor 付武昌蔡青周文
Owner CHONGQNG PRET NEW MATERIAL
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