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Low-VOC (volatile organic compound) long glass fiber reinforced polypropylene composite material and preparation method thereof

A technology of long glass fiber and polypropylene materials, which is applied in the field of low VOC, long glass fiber reinforced polypropylene composite materials and its manufacturing, and can solve the problems of reducing the fluidity of crystalline polymer substrates, performance degradation of reinforced composite materials, and insufficient fiber Impregnation and other issues, to achieve good low VOC emission performance, good tensile, excellent heat resistance

Inactive Publication Date: 2012-07-04
SHANGHAI PRET COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during the injection molding process, a high proportion of reinforcement materials, such as glass fiber, carbon fiber or other reinforcement materials, and insufficient fiber impregnation, will reduce the fluidity of the rapidly solidifying crystalline polymer matrix, especially in high reinforcement. ratio and in the case of molded articles with large wall thicknesses, resulting in a deterioration of the properties of the resulting reinforced composite and a decrease in surface quality

Method used

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  • Low-VOC (volatile organic compound) long glass fiber reinforced polypropylene composite material and preparation method thereof
  • Low-VOC (volatile organic compound) long glass fiber reinforced polypropylene composite material and preparation method thereof
  • Low-VOC (volatile organic compound) long glass fiber reinforced polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Use the TE-35 (length-to-diameter ratio L / D=48) twin-screw extruder that has side feeding port, add 900 grams of polypropylene resin PP-1, 0.5 gram 1,4-( Two tert-butyl peroxy) dicumyl and 1.5 grams of maleic anhydride, add 3 grams of white carbon black-1 and 95 grams of polypropylene PP-1 of the remaining part at the side feed port. The processing temperature (from the feed port to the die head) is: 140°C, 180°C, 200°C, 220°C, 240°C, 240°C, 260°C, 260°C, and the speed of the main machine is 300rpm.

[0040] The compound and the continuous glass fiber melted and reacted by the extruder adopt the pultrusion process, the impregnating temperature is 240°C, and the impregnated head is cooled and cut into pellets, and the fiber weight percentage is 10% and its length is the same as that of the resin pellets. The long glass fiber reinforced PP pellets with the same material length were used to prepare standard mechanical test samples by injection molding machine. The test res...

Embodiment 2

[0042] Use the TE-35 (length-to-diameter ratio L / D=48) twin-screw extruder that has side feeding port, add 900 grams of polypropylene resin PP-1, 1 gram of 1,4-( Two tert-butyl peroxy) dicumyl and 2 grams of maleic anhydride, add 10 grams of white carbon black-1 and 87 grams of polypropylene PP-1 of the remaining part at the side feed port. The processing temperature (from the feed port to the die head) is: 140°C, 180°C, 200°C, 220°C, 240°C, 240°C, 260°C, 260°C, and the speed of the main machine is 300rpm.

[0043] The compound and the continuous glass fiber melted and reacted by the extruder adopt the pultrusion process, the impregnation temperature is 260°C, and the fiber weight percentage is 20% and the length is the same as the resin pellet. The long glass fiber reinforced PP pellets with the same material length were used to prepare standard mechanical test samples by injection molding machine. The test results are shown in Table 1.

Embodiment 3

[0045]Use the TE-35 (length-to-diameter ratio L / D=48) twin-screw extruder that has side feeding port, add 900 grams of polypropylene resin PP-1, 1 gram of 1,4-( Two tert-butyl peroxy) dicumyl and 4 grams of maleic anhydride, add 25 grams of white carbon black-1 and 70 grams of polypropylene PP-1 of the remaining part at the side feed port. The processing temperature (from the feed port to the die head) is: 140°C, 180°C, 200°C, 220°C, 240°C, 240°C, 260°C, 260°C, and the speed of the main machine is 300rpm.

[0046] The compound and continuous glass fiber melted and reacted by the extruder adopt the pultrusion process, and the impregnation temperature is 260°C. After passing through the impregnation head, it is cooled and cut into pellets, and the fiber weight percentage is 30% and its length is the same as that of the resin pellets. The long glass fiber reinforced PP pellets with the same material length were used to prepare standard mechanical test samples by injection molding...

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Abstract

The invention discloses a low-VOC (volatile organic compound) long glass fiber reinforced polypropylene composite material and a preparation method thereof. The composite material comprises the following components by weight percent: 10-60% of long glass fiber arranged parallel to particle length and 90-40% of modified polypropylene resin, wherein the modified polypropylene resin is prepared by carrying out reaction and extrusion on known commercialized polypropylene resin through melting and kneading equipment such as a two-screw extruder. The preparation method has the beneficial effects that high-flowability polypropylene resin does not need to be singly produced or purchased in advance, and the production process is simplified. The prepared low-VOC long glass fiber reinforced polypropylene composite material has the beneficial effects of good apparent performance, no exposed glass fiber, no warping, good heat resistance, and easiness for processing. The product prepared by the method has the advantages of good low-VOC diffusion property and good mechanical properties such as good stretch and bending strengths and good impact resistance.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to a low VOC, long glass fiber reinforced polypropylene composite material and a manufacturing method thereof. Background technique [0002] With the rapid development of the automobile industry, people spend more and more time in the car, and the poor air quality inside the car seriously threatens people's health. The quality of the air inside the car has become the focus of social attention. [0003] Studies have shown that there are more than 160 types of volatile organic compounds (Volatile Organic Compounds, VOCs) at room temperature, mainly some aliphatic hydrocarbons and aromatic compounds, among which benzene, acetone, toluene, ethylbenzene, and xylene are more harmful , 1,3-butadiene, ethylene glycol butyl ether, free formaldehyde, polybrominated diphenyl ethers, phthalates, etc. These chemical substances are volatile and lipophilic, and are widely used in the industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/04C08K7/14C08K3/36C08K5/1539C08K5/14B29C47/92B29C48/92
CPCB29C48/40
Inventor 陈永东李宏张祥福周文
Owner SHANGHAI PRET COMPOSITES
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