Long fiberglass-reinforced polypropylene composite material and preparation method thereof

A composite material and polypropylene technology, applied in the field of long glass fiber reinforced polypropylene composite material and its preparation, can solve the problems of insufficient strength, rigidity and heat resistance, and achieve good dimensional stability, low elongation at break, high resistance to good corrosion effect

Inactive Publication Date: 2013-02-06
江苏雅泰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in many cases, there are still shortcomings of insufficient strength, rigidity and heat resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of long glass fiber reinforced polypropylene composite material, comprising the following steps:

[0023] (1) Polypropylene, polypropylene grafted maleic anhydride, alkali-free long fiber, cooling masterbatch, antioxidant AT-215, KH-550, P-2015 according to 52.4:4:40:1:0.1:0.5 :2 ratio for mixing and stirring;

[0024] (2) Add the mixture obtained in step (1) into the twin-screw extruder. The barrel temperature of the twin-screw extruder is heated in ten stages. The heating temperature of the first to third stages is 180°C, and the heating temperature of the fourth to sixth stages is 210 °C, the heating temperature of the seventh to ninth stages is 210 °C, the die head temperature is 210 °C, the melt is extruded through the twin-screw extrusion die, the melt temperature is 220 °C, and transported to the impregnation device;

[0025] (3) Preheat and dry the continuous long glass fiber for 2 hours to make the temperature 80°C, and then transport it f...

Embodiment 2

[0028] A preparation method of long glass fiber reinforced polypropylene composite material, comprising the following steps:

[0029] (1) Polypropylene, polypropylene grafted maleic anhydride, alkali-free long fiber, cooling masterbatch, antioxidant AT-215, KH-560, P-2015 according to 52.4:4:40:1:0.1:0.5 :2 ratio for mixing and stirring;

[0030] (2) Add the mixture obtained in step (1) into the twin-screw extruder. The barrel temperature of the twin-screw extruder is heated in ten stages. The heating temperature of the first to third stages is 190°C, and the heating temperature of the fourth to sixth stages is 220 °C, the heating temperature of the seventh to ninth stages is 215 °C, the die head temperature is 210 °C, the melt is extruded through the twin-screw extrusion die, the melt temperature is 220 °C, and transported to the impregnation device;

[0031] (3) Preheat and dry the continuous long glass fiber for 3 hours to make the temperature 85°C, and then transport it f...

Embodiment 3

[0034] A preparation method of long glass fiber reinforced polypropylene composite material, comprising the following steps:

[0035] (1) Polypropylene, polypropylene grafted maleic anhydride, alkali-free long fiber, cooling masterbatch, antioxidant AT-215, KH-550, P-2015 according to 52.4:4:40:1:0.1:0.5 :2 ratio for mixing and stirring;

[0036] (2) Add the mixture obtained in step (1) into the twin-screw extruder. The temperature of the barrel of the twin-screw extruder is heated in ten stages. °C, the heating temperature of the seventh to ninth stages is 220 °C, the die temperature is 210 °C, the melt is extruded through the twin-screw extrusion die, the melt temperature is 220 °C, and transported to the impregnation device;

[0037] (3) Preheat and dry the continuous long glass fiber for 4 hours to make the temperature 90°C, and then transport it from the die head to the impregnation mold, the mold temperature is 100°C, so that the long glass fiber is fully impregnated by...

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Abstract

The invention discloses a long fiberglass-reinforced polypropylene composite material, which is prepared from the raw materials of polypropylene, a compatilizer, a filler, cooling masterbatch, an antioxidant, a coupling agent and a flow modifier at a ratio of 52.4:4:40:1:0.1:0.5:2. The preparation method comprises the steps of: (1) mixing and stirring the raw materials according to the ratio; (2) adding the mixture obtained in the step (1) to a double-screw extruder, extruding melt by a double-screw extrusion mouth mold, and conveying to an immersing device; (3) preheating and drying continuous long fiberglass, conveying to an immersing mold from the mold head, and entering a coating device for coating; and (4) finally cooling, solidifying and pelleting. The composite material has the advantages of high rigidity, high toughness, low elongation at break, high elasticity modulus, resistance to fire, mild, heat and corrosion, good dimensional stability and the like.

Description

technical field [0001] The invention relates to a long glass fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is currently one of the most widely used general-purpose plastics in the world. Its application involves various fields of people's lives and has good comprehensive properties. [0003] Polypropylene (PP) has strong competitiveness in the automotive industry, but because of its low modulus and heat resistance and poor impact strength, it cannot be directly used as auto parts. All cars are modified PP. The heat resistance of the product can be increased from 80°C to 145°C~150°C, and it can withstand high temperature for 750~1000 hours without aging or cracking. According to reports, the new generation of highly oriented crystallinity polypropylene HEHCPP products launched by Japan's Toyota Corporation can be used as automobile dashboards and bumpers, and the cost is 30% lower than tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K7/14B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/90B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40B29C48/875B29C48/92B29C2948/92704
Inventor 杨绪强贾明印樊德选董欣
Owner 江苏雅泰新材料有限公司
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