Bimodally-distributed glass fiber reinforced polypropylene composite material and preparation method thereof

A bimodal distribution, composite material technology, applied in the field of polymer materials, can solve the problems of insufficient distribution length, low mechanical performance index, short glass fiber length, etc., and achieve the effect of improving dimensional stability, improving performance defects and reasonable distribution.

Inactive Publication Date: 2015-09-16
SHANGHAI JUNER NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For conventional short glass fiber reinforced polypropylene composites, because the distribution length of its reinforcement is not as good as that of long glass fiber materials, the improvement of dimensional stability for polypropylene is not outstanding, and in injection molding, glass fibers are due to The length is short, and it is easy to find the orientation dispersion along the flow direction, which leads to structural and performance problems of the composite material in the vertical flow direction
Not only the mechanical performance index of the material is low, but also the shrinkage rate is too large, and it is easy to fluctuate with the change of ambient temperature

Method used

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  • Bimodally-distributed glass fiber reinforced polypropylene composite material and preparation method thereof
  • Bimodally-distributed glass fiber reinforced polypropylene composite material and preparation method thereof
  • Bimodally-distributed glass fiber reinforced polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh each component according to the data of Example 1 shown in Table 1, mix each component other than the glass fiber chopped strand mat evenly with the high-speed mixer, and put it into the main feeding bin of the twin-screw extruder, The glass fiber chopped strand mat is put into the side feeding bin, the screw diameter of the extruder is 35mm, the length-to-diameter ratio L / D is 40, the speed of the main engine is set at 250 rpm, and the temperature of each zone of the main barrel (from the feeding port to Head outlet) is set at 60°C, 160°C, 190°C, 195°C, 200°C, 210°C, 210°C, and the product is obtained after melt extrusion, cooling, granulation, drying and other processes.

[0043] The formula table of the glass fiber reinforced polypropylene composite material of table 1 bimodal distribution (unit: gram)

[0044]

[0045]

Embodiment 2

[0047] Weigh each component according to the data of Example 2 shown in Table 1, mix the components other than the glass fiber chopped strand mat evenly with the high-speed mixer, and put it into the main feeding bin of the twin-screw extruder. The glass fiber chopped strand mat is put into the side feeding bin, the screw diameter of the extruder is 35mm, the length-to-diameter ratio L / D is 40, the speed of the main engine is set at 250 rpm, and the temperature of each zone of the main barrel (from the feeding port to Head outlet) is set at 60°C, 160°C, 190°C, 195°C, 200°C, 210°C, 210°C, and the product is obtained after melt extrusion, cooling, granulation, drying and other processes.

Embodiment 3

[0049] Weigh each component according to the data of Example 3 shown in Table 1, mix each component other than glass fiber chopped strand mat with a high-speed mixer, and put it into the main feeding bin of the twin-screw extruder. The glass fiber chopped strand mat is put into the side feeding bin, the screw diameter of the extruder is 35mm, the length-to-diameter ratio L / D is 40, the speed of the main engine is set at 250 rpm, and the temperature of each zone of the main barrel (from the feeding port to Head outlet) is set at 60°C, 160°C, 190°C, 195°C, 200°C, 210°C, 210°C, and the product is obtained after melt extrusion, cooling, granulation, drying and other processes.

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Abstract

The invention relates to a bimodally-distributed glass fiber reinforced polypropylene composite material and a preparation method thereof, belonging to the technical field of high polymer materials. The bimodally-distributed glass fiber reinforced polypropylene composite material comprises the following raw materials in percentage by weight: 40%-70% of polypropylene, 3%-10% of a graft compatilizer, 20%-40% of a glass fiber chopped felt, 10%-30% of glass fiber powder and 3%-10% of an olefin elastomer. The bimodally-distributed glass fiber reinforced polypropylene composite material has the superiorities; by adding and compounding glass fiber reinforcement bodies of different lengths, a specific composite reinforcing system in which glass fiber lengths are of a bimodal distribution effect is built in polypropylene, the structural and performance differences of traditional glass fiber reinforced polypropylene in the longitudinal direction and the transverse direction are changed, the mechanical performance and thermal performance of the material in a vertical flow direction are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a bimodal distribution glass fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is widely used in automobiles, electrical appliances, building materials and other fields because of its excellent comprehensive performance, good chemical stability, good molding processing type and relatively low price. It is currently one of the most widely used general-purpose plastics. First, because its molecular chains are easy to stack regularly, resulting in large molding shrinkage and dimensional fluctuations of the resulting parts, therefore, adding inorganic reinforcing materials such as glass fiber GF can not only effectively make up for the performance defects of polypropylene, but also benefit Improve the molding and processing of polypropylene materials. Long glass fiber reinforced polypr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/06C08L53/00C08K7/00C08K7/14
CPCC08L23/12C08L23/14C08L2205/03C08L2205/16C08L51/06C08L53/00C08K7/00C08K7/14
Inventor 郑云龙黄志杰杨仓先
Owner SHANGHAI JUNER NEW MATERIALS
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