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Chopped glass fiber reinforced polypropylene composite material and preparation method and application thereof

A composite material, polypropylene technology, applied in the field of polypropylene modification, can solve the problems of glass fiber breakage and performance degradation, and achieve the effects of reducing damage and damage, high impact strength, and long retention length

Active Publication Date: 2013-10-09
WUHAN JINFA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method will cause serious damage to the glass fiber during processing, and the remaining length of the glass fiber in the product after injection molding is only in the range of 0.2-0.5mm
At least 20% lower performance than LFT products

Method used

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  • Chopped glass fiber reinforced polypropylene composite material and preparation method and application thereof
  • Chopped glass fiber reinforced polypropylene composite material and preparation method and application thereof
  • Chopped glass fiber reinforced polypropylene composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Preparation of short glass fiber reinforced polypropylene composite

[0039] Pre-mix other components other than chopped glass fiber, place the uniformly mixed material in the main feeding port of the twin-screw extruder, put the chopped glass fiber into the side feeding machine from the side feeding port, and melt and extrude. The pelletizing of the mold surface under water was carried out to prepare the short glass fiber reinforced polypropylene composite material.

[0040] The side feeder has a length-to-diameter ratio of 8:1, a speed setting of 200rpm, and a heating function. The twin-screw extruder adopts a special screw element and screw combination, and the glass fiber dispersion area is a large-lead, non-meshing screw element. For specific parameters, see figure 1 (purchased from Sichuan Zhongzhuang Technology Co., Ltd.).

[0041] The melt extrusion process parameters are set as follows: the temperature of the first zone of the main machine is 140°C...

Embodiment 2

[0043] Example 2: Preparation of short glass fiber reinforced polypropylene composite

[0044] Pre-mix other components other than chopped glass fiber, place the uniformly mixed material in the main feeding port of the twin-screw extruder, put the chopped glass fiber into the side feeding machine from the side feeding port, and melt and extrude. The pelletizing of the mold surface under water was carried out to prepare the short glass fiber reinforced polypropylene composite material.

[0045] The side feeder has a length-to-diameter ratio of 8:1, a speed setting of 200rpm, and a heating function. The twin-screw extruder adopts a special screw element and screw combination, and the glass fiber dispersion area is a large-lead, non-meshing screw element (purchased from Sichuan Zhongzhuang Technology Co., Ltd.).

[0046] The melt extrusion process parameters are set as follows: the temperature of the first zone of the main machine is 140°C, the temperature of the second zone is ...

Embodiment 3

[0048] Example 3: Preparation of short glass fiber reinforced polypropylene composite

[0049] Pre-mix other components other than chopped glass fiber, place the uniformly mixed material in the main feeding port of the twin-screw extruder, put the chopped glass fiber into the side feeding machine from the side feeding port, and melt and extrude. The pelletizing of the mold surface under water was carried out to prepare the short glass fiber reinforced polypropylene composite material.

[0050] The side feeder has a length-to-diameter ratio of 8:1, a speed setting of 200rpm, and a heating function. The twin-screw extruder adopts a special screw element and screw combination, and the glass fiber dispersion area is a large-lead, non-meshing screw element (purchased from Sichuan Zhongzhuang Technology Co., Ltd.).

[0051] The melt extrusion process parameters are set as follows: the temperature of the first zone of the main machine is 140°C, the temperature of the second zone is ...

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Abstract

The invention belongs to the technical field of polypropylene modification and discloses a chopped glass fiber reinforced polypropylene composite material and a preparation method and application thereof. The chopped glass fiber reinforced polypropylene composite material is prepared from the following ingredients in percentage by mass: 35-75% of polypropylene, 3-10% of grafted modified polypropylene, 20-60% of chopped glass fibers, 0.1-0.5% of antioxidant and 0.2-0.8% of lubricant. During the preparation of the chopped glass fiber reinforced polypropylene composite material disclosed by the invention, glass fiber dispersion zones of screws of a twin-screw extruder adopt large-lead and non-meshed screw elements, so that the damage and destruction to the glass fibers caused by chopping are reduced, and the reserved length of the glass fibers is guaranteed; and the obtained composite material has the advantages that the mechanical properties are excellent, the tensile strength reaches up to 132MPa, the bending strength reaches up to 187MPa, the bending modulus reaches up to 12,733MPa, and the notched impact strength reaches up to 51 KJ / m<2>.

Description

technical field [0001] The invention belongs to the technical field of polypropylene modification, in particular to a short glass fiber reinforced polypropylene composite material and its preparation method and application. Background technique [0002] Due to the ease of processing, low cost and excellent mechanical properties of short glass fiber reinforced polypropylene composite materials, some properties can be compared with engineering plastics, making it increasingly competitive in the electrical, electronic and automotive markets, especially in the automotive industry. Widespread, more and more automotive components are manufactured from glass fiber reinforced polypropylene. [0003] There are three main ways of glass fiber reinforced polypropylene composite materials. The first is to add continuous fiber yarn into the twin-screw extruder, and use reasonable screw design to cut the continuous fiber through screw shearing, and mix and disperse with the melt. Finally,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/06C08K7/14C08J5/04B29B9/06
Inventor 易新袁志敏叶南飚刘乐文王大中钱永红饶湘余兴兴
Owner WUHAN JINFA TECH CO LTD
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