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Short glass fiber reinforced polypropylene composite material and preparation method thereof

A technology of composite materials and polypropylene, which is applied in the field of short glass fiber reinforced polypropylene composite materials and its preparation, can solve the problems of low impact strength, poor fluidity, and low floating fibers of materials, so as to improve toughness and impact resistance, improve Effect of grafting rate and improvement of dispersibility

Active Publication Date: 2020-04-07
WANHUA CHEMICAL (NINGBO) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN 103788490 A uses calcium sulfate whiskers to replace part of the glass fiber, so that the material has better mechanical properties and lower floating fiber, but the addition of whiskers makes the impact strength of the material lower
[0006] CN 103772813 A uses high-flow resin to prepare anti-floating fiber masterbatch, so that the material has better anti-floating fiber effect, but the main resin uses low-melt index PP, resulting in poor fluidity and low impact strength of the material
[0007] At present, there is no good solution to the aforementioned problems, which greatly limits the application range of glass fiber reinforced polypropylene

Method used

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  • Short glass fiber reinforced polypropylene composite material and preparation method thereof
  • Short glass fiber reinforced polypropylene composite material and preparation method thereof
  • Short glass fiber reinforced polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0069] Embodiment 1-7 (being S1-7) and comparative example 1-3 (being D1-3)

[0070] According to each raw material and consumption thereof in table 1, carry out the preparation of grinding flat glass fiber master batch and grinding conventional glass fiber master batch;

[0071] The preparation method is as follows: according to Table 1, each raw material is weighed and added to an internal mixer for internal mixing and grafting; then it is extruded and granulated by a single screw to obtain ground glass fiber masterbatches A1-7 and A1'-3'( Including grinding flat glass fiber masterbatch and grinding regular glass fiber masterbatch);

[0072] The preparation conditions are shown in Table 2, and the prepared ground flat masterbatch is shown in Table 3.

[0073] Raw materials and their dosage in Table 1 S1-7 and D1-3

[0074]

[0075] Preparation conditions in Table 2 S1-7 and D1-3

[0076] Preparation conditions S1 S2 S3 S4 S5 S6 S7 D1 D2 D3 Mixin...

Embodiment 8-14

[0079] Embodiment 8-14 (being S8-14) and comparative example 4-6 (being D4-6)

[0080] According to each raw material and consumption thereof in table 4, carry out the preparation of short glass fiber reinforced polypropylene composite material;

[0081]The preparation method is as follows: take each raw material according to Table 4, grind the glass fiber masterbatches A1-7 and A1'-3' (ground flat glass fiber masterbatches or Grinding conventional glass fiber masterbatch) and the first polypropylene, the first compatibilizer, polyolefin elastomer, the first antioxidant and the first lubricant are mixed together and then sent into the twin-screw extruder through the main feed port, Feed the chopped glass fiber into the twin-screw extruder through the side feeding port, and then extrude and granulate to obtain short glass fiber reinforced polypropylene composite materials B1-7 and B1'-3';

[0082] Wherein, the preparation conditions are as follows: the aspect ratio of the twin...

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Abstract

The invention provides a short glass fiber reinforced polypropylene composite material and a preparation method thereof. The composite material is prepared from the following raw materials in parts byweight: 10-80 parts of first polypropylene, 1-10 parts of a first compatibilizer, 5-30 parts of a polyolefin elastomer, 5-20 parts of grinded flat glass fiber master batch, 20-50 parts of chopped glass fiber, 0.1-1 part of a first antioxidant, and 0.2-1 part of a first lubricant, wherein the grinded flat glass fiber master batch is obtained by mixing raw materials including second polypropylene,a second compatilizer, grinded flat glass fibers, a second antioxidant and a second lubricant and then extruding and granulating. The preparation method comprises the following steps: (1) mixing raw materials for preparing grinded flat glass fiber master batch, and extruding and granulating to obtain grinded flat glass fiber master batch; and (2) feeding chopped glass fibers into a double-screw extruder through a side feeding port, feeding other raw materials into the double-screw extruder through a main feeding port, and extruding and granulating. The composite material has the advantages oflow floating fiber, excellent appearance, high strength and high toughness. The preparation method is simple.

Description

technical field [0001] The invention belongs to the field of polymer materials and processing, and in particular relates to a short glass fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Glass fiber reinforced polypropylene is a composite material with excellent performance. It has the advantages of high mechanical strength, good heat resistance, and stable size. It has broad application prospects in the automotive and home appliance industries. The performance of glass fiber reinforced polypropylene is greatly affected by the glass fiber content. Generally speaking, the higher the glass fiber content, the higher the mechanical properties of glass fiber reinforced polypropylene, but as the glass fiber content increases, the surface finish of the product decreases. 1. The phenomenon of floating fibers is serious, which greatly limits the application range of glass fiber reinforced polypropylene, especially for a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L51/06C08L23/08C08K9/04C08K7/14C08K5/134C08K5/526C08K5/098C08K13/06C08J5/08
CPCC08J5/08C08J2323/14C08J2451/06C08J2423/08C08K9/08C08K7/14C08K5/1345C08K5/526C08K5/098C08K13/06
Inventor 陆佳伟李保印王绍杰
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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