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Low-emission, low-floating-fiber, low-warping and ultra-dispersed long glass fiber polyamide composite material and preparation method thereof

A long glass fiber polyamide and composite material technology, applied in the direction of coating, etc., can solve the problems of difficult to achieve good dispersion of glass fiber, poor material wetting effect, etc., to increase the wetting effect and fluidity, easy to control, and good economic benefits Effect

Active Publication Date: 2021-05-28
中广核俊尔(浙江)新材料有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to achieve good dispersion of glass fiber with this conventional pressure rod group, and the material wetting effect is poor

Method used

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  • Low-emission, low-floating-fiber, low-warping and ultra-dispersed long glass fiber polyamide composite material and preparation method thereof
  • Low-emission, low-floating-fiber, low-warping and ultra-dispersed long glass fiber polyamide composite material and preparation method thereof
  • Low-emission, low-floating-fiber, low-warping and ultra-dispersed long glass fiber polyamide composite material and preparation method thereof

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The operating methods not indicated in the following examples are generally in accordance with conventional conditions, or in accordance with the conditions suggested by the manufacturer.

[0050] The raw material formulations of the following examples and comparative examples are shown in Table 1, and the figures are all mass percentages, in units of %. PA6 Xinhui Meida M2000 and M2400. The cross section of flat glass fiber ECS301HP-3-M3 is about 24 μm long and 8 μm wide, with an aspect ratio of 3. Coupling agent KH560. Lubricant, Zhonglan Chenguang GM-100. Black female, Cabot 3785.

[0051] Following each embodiment, the equipment that comparative example adopts such as Figure 1~4...

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Abstract

The invention discloses a low-emission, low-floating-fiber, low-warping and ultra-dispersed long glass fiber polyamide composite material and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing all the raw materials except long glass fibers, and adding the mixture into a double-screw extruder from a main feeding hopper; enabling the long glass fibers to penetrate through a fiber adding hole; and performing melt impregnation extrusion in the double-screw extruder to obtain the low-emission, low-floating-fiber, low-warping and ultra-dispersed long glass fiber polyamide composite material. A melt impregnation section in the double-screw extruder is provided with a plurality of sequentially-arranged infiltration type extrusion compression bar groups; each infiltration type extrusion compression bar group comprises two compression bars which have opposite cambered surfaces and are arranged in a staggered mode; the cambered surfaces of the compression bars with the downward cambered surfaces are provided with a plurality of protrusions arranged and distributed in the direction perpendicular to the moving direction of the long glass fibers; and a plurality of grooves which are arranged and distributed in the direction perpendicular to the moving direction of the long glass fibers are formed in the cambered surfaces of the compression bars with the upward cambered surfaces.

Description

technical field [0001] The invention relates to the technical field of long glass fiber polyamide composite material and its preparation, in particular to a low emission, low floating fiber, low warpage, ultra-dispersed long glass fiber polyamide composite material and a preparation method thereof. Background technique [0002] As an engineering plastic, polyamide has been widely used in automobiles, electronic appliances, etc., but its water absorption results in the reduction of some mechanical properties and dimensional instability, causing various problems in the use of parts, so it needs to be passed Modification is used to maintain the stability of the material, and glass fiber reinforcement is the main way to solve this problem. However, due to the addition of glass fiber, the fluidity of the material is reduced, and the wetting effect of the material is not good, and the appearance of the part is prone to floating fibers. For parts with high surface requirements, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B15/14B29K77/00
CPCB29B15/14B29K2077/00
Inventor 周琴恩陈智文郑云磊陈永波
Owner 中广核俊尔(浙江)新材料有限公司
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