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High performance composite long fiber reinforced polypropylene material and preparation method thereof

A polypropylene material and long fiber technology, which is applied in the field of high-performance composite long glass fiber reinforced polypropylene material and its preparation, can solve the problems of poor interphase compatibility, increased material processing flow and cost, etc. The effect of strong resistance, rigidity and impact resistance improvement, and high fiber surface activation energy

Inactive Publication Date: 2019-11-15
上海华合复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at this performance defect problem, the current existing solution is to add a third type of high-performance matrix or reinforcement other than PP and GF, such as a nanomaterial composite long glass fiber reinforced polypropylene material described in CN105623097A, 1-5% nano-reinforced masterbatch can significantly improve the mechanical properties of LFT-PP materials, but the degree of improvement of this performance also depends on the dispersion of nanomaterials. Therefore, it must be processed into masterbatches to add, Dispersion increases the process flow and cost of material processing; CN103709512A introduces high-performance nylon (PA) material as the second resin matrix of LFT-PP, but due to the difference in material properties between PP and PA, the two The interphase compatibility of the LFT-PP material is not good, so its improvement in the mechanical properties of the LFT-PP material is actually very limited

Method used

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  • High performance composite long fiber reinforced polypropylene material and preparation method thereof
  • High performance composite long fiber reinforced polypropylene material and preparation method thereof
  • High performance composite long fiber reinforced polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take by weighing polypropylene resin, high-efficiency compatibilizer by the embodiment 1 data shown in table 1, mix homogeneously, obtain mixed raw material:

[0037] The dried mixed raw materials are placed in the main feeding bin of a tightly meshed co-rotating twin-screw extruder, and fed into the barrel of the extruder through the feeding screw. The diameter of the extruder screw is 36mm. The length-to-diameter ratio L / D is 44, and the temperature of each zone of the main barrel from the feeding port to the nozzle outlet is set as: 100°C, 190°C, 200°C, 215°C, 220°C, 220°C, 220°C, and the main engine speed is 300 rpm, the resulting molten polypropylene resin is injected into the impregnation cavity through the die of the extruder.

[0038] The continuous glass fiber and continuous basalt fiber are respectively placed on the creel, pre-tensioned by the tension roller to divide the yarn, and then they are exported from different bobbins and arranged in parallel, and th...

Embodiment 2

[0042] Take by weighing polypropylene resin, high-efficiency compatibilizer by the embodiment 2 data shown in table 1, mix homogeneously, obtain mixed raw material:

[0043] The dried mixed raw materials are placed in the main feeding bin of a tightly meshed co-rotating twin-screw extruder, and fed into the barrel of the extruder through the feeding screw. The diameter of the extruder screw is 36mm. The length-to-diameter ratio L / D is 44, and the temperature of each zone of the main barrel from the feeding port to the nozzle outlet is set as: 100°C, 190°C, 200°C, 215°C, 220°C, 220°C, 220°C, and the main engine speed is 300 rpm, the resulting molten polypropylene resin is injected into the impregnation cavity through the die of the extruder.

[0044] The continuous glass fiber and continuous basalt fiber are respectively placed on the creel, pre-tensioned by the tension roller to divide the yarn, and then they are exported from different bobbins and arranged in parallel, and th...

Embodiment 3

[0046] Take by weighing polypropylene resin, high-efficiency compatibilizer by the embodiment 3 data shown in table 1, mix homogeneously, obtain mixed raw material:

[0047] The dried mixed raw materials are placed in the main feeding bin of a tightly meshed co-rotating twin-screw extruder, and fed into the barrel of the extruder through the feeding screw. The diameter of the extruder screw is 36mm. The length-to-diameter ratio L / D is 44, and the temperature of each zone of the main barrel from the feeding port to the nozzle outlet is set as: 100°C, 190°C, 200°C, 215°C, 220°C, 220°C, 220°C, and the main engine speed is 300 rpm, the resulting molten polypropylene resin is injected into the impregnation cavity through the die of the extruder.

[0048] The continuous glass fiber and continuous basalt fiber are respectively placed on the creel, pre-tensioned by the tension roller to divide the yarn, and then they are exported from different bobbins and arranged in parallel, and th...

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Abstract

The invention relates to a high performance composite long fiber reinforced polypropylene material and a preparation method thereof. The high performance composite long fiber reinforced polypropylenematerial is specifically composed of the following raw materials by weight: 30-70 parts of polypropylene resin, 10-20 parts of continuous glass fiber, 10-20 parts of continuous basalt fiber, and 2-10parts of a high efficiency compatilizer. The invention has the advantages that: the high-performance and shear resistant novel basalt fiber is introduced as a second fiber reinforcement for compounding, and the long fiber processing way of "melt impregnation, particle long cutting" is employed to maximumly retain the effective retention length of fiber after forming machining of the reinforced polypropylene material. Compared with the 1.5-2mm retention length in conventional long glass fiber reinforced polypropylene material, the composite long fiber reinforced material has significantly higher fiber retention length after forming machining up to 2.5-4mm, and the fiber dispersion is more uniform, the main rigid indexes of the material, like tensile strength and impact strength, are also increased by 30-50% on the same basis, wherein the tensile strength can reach 140MPa or above, and the highest impact strength is 70kJ / m<2>.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-performance composite long glass fiber reinforced polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a crystalline polyolefin material composed of saturated hydrocarbon molecular chains. The saturated hydrocarbon molecular chains and crystallinity endow the material with good chemical resistance and relatively good mechanical properties. As one of the ideal materials for high-performance thermoplastic-based composite materials. The biggest advantage of PP materials is that the synthesis process is simple, and the polymerized monomers can be derived from the by-products of the oil refining industry. Therefore, compared with other thermoplastic matrix materials such as ABS, PC, PA, PBT, etc., PP has very obvious low cost and high quantity. productive advantage. [0003] With the continuous upgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L51/06C08K7/14C08K7/10C08J5/04
CPCC08J5/043C08J5/047C08J2323/10C08J2451/06C08K7/10C08K7/14C08J5/0405
Inventor 徐凯华
Owner 上海华合复合材料有限公司
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