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A kind of preparation method of glass fiber reinforced thermoplastic resin composite material

A resin composite material and enhanced thermoplastic technology, applied in the field of plastic manufacturing, can solve the problems of uneven length distribution and short length of glass fiber, and achieve the effect of uniform distribution and increased strength

Active Publication Date: 2021-10-22
合聚高分子材料科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if a weak shear (30°~45°) is used in the initial stage, the glass fiber added in the previous stage will be cut into pieces and the length of the glass fiber in the product obtained will be short and the length distribution will be uneven.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The content ratio of each component: polypropylene: 60%, glass fiber: 36.9%, antioxidant: 0.1%, maleic anhydride grafted polypropylene: 3%.

[0043] After mixing polypropylene and antioxidant evenly, it is sheared by a twin-screw extruder. The length-to-diameter ratio of the screw is 48:1. The glass fiber is fed by two side feeders. After granulation and shearing, the glass fiber reinforced thermoplastic is obtained. Resin composite material; wherein, the first side feeding port is in the fifth section of the screw barrel, the second side feeding port is in the eighth section of the screw barrel, and the arrangement of the shearing elements from the main feeding port to the first side feeding port is 30 degrees / 45° / 60° / 90° are alternately arranged, the screw between the first side feeding port and the second side feeding port adopts shearing elements with a staggered angle of 60 degrees, and between the second side feeding port and the vacuum port The screw adopts shea...

Embodiment 2

[0045] The content ratio of each component: PA6: 60%, glass fiber: 39.9%, antioxidant: 0.1%.

[0046] After mixing PA6 and antioxidant evenly, it is sheared by a twin-screw extruder. The length-to-diameter ratio of the screw is within the range of 52:1. The glass fiber is fed by two side feeders. After granulation and shearing, the glass fiber is obtained. Reinforced thermoplastic resin composite material; wherein, the first side feeding port is in the fifth to sixth section of the screw barrel, the second side feeding port is in the eighth or ninth section of the screw barrel, the main feeding port to the first side feeding port The shearing elements are arranged alternately at 30° / 45° / 60° / 90°, and the screw between the first side feeding port and the second side feeding port adopts a staggered angle of 60 degrees in the first half and 90 degrees in the second half. Shear element, the screw rod between the second side feeding port and the vacuum port adopts a shear element wi...

Embodiment 3

[0048] The content ratio of each component: PBT: 60%, glass fiber: 39.9%, antioxidant: 0.1%.

[0049]After mixing PBT and antioxidant evenly, it is sheared by a twin-screw extruder. The length-to-diameter ratio of the screw is within the range of 56:1. The glass fiber is fed by two side feeders. After granulation and shearing, the glass fiber is obtained. Reinforced thermoplastic resin composite material; wherein, the first side feeding port is in the fifth to sixth section of the screw barrel, the second side feeding port is in the eighth or ninth section of the screw barrel, the main feeding port to the first side feeding port The shearing elements are arranged alternately at 30° / 45° / 60° / 90°, and the screws between the first side feeding port and the second side feeding port are evenly distributed with a staggered angle of 60° / 72° / 90° Shearing element, the screw between the second side feeding port and the vacuum port adopts a shearing element with a staggered angle of 30 de...

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Abstract

The invention discloses a method for preparing a glass fiber reinforced thermoplastic resin composite material. By selecting a screw with a higher aspect ratio (the aspect ratio of the screw is in the range of 48:1 to 56:1), and by setting the glass fiber on both sides The glass fiber is fed into the feeding port, and the distribution of the shear strength of the special screw shearing element can improve the length of the glass fiber distributed in the resin more uniformly, and the retention length is longer.

Description

technical field [0001] The invention relates to the field of plastic manufacturing, in particular to a method for preparing a glass fiber reinforced thermoplastic resin composite material. Background technique [0002] High-content glass fiber reinforced thermoplastic composites have the advantages of high strength and high modulus. For example, reinforced PA with a glass fiber content of 50-70% has been used more and more in automotive lightweight and IT parts. Due to the high glass fiber content, the existing twin-screw melt blending preparation method (40:1 aspect ratio, single-side feeding mode, screw combination form with screw shearing elements mainly at 60 degrees and 90 degrees) has glass fiber Difficulty in fiber dispersion, infiltration and dispersion, inability to give full play to the effect of glass fiber reinforcement, and serious floating fibers on the surface of the material. [0003] Generally, even if a high aspect ratio (such as 48:1) and multiple feeding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/92B29C48/40B29C48/625B29C48/505
CPCB29C48/40B29C48/505B29C48/625B29C48/92B29C2948/9258B29C2948/92704
Inventor 陈大华陈金伟
Owner 合聚高分子材料科技(广东)有限公司
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