Ultra-light high-strength high-sound-absorption fiber-reinforced thermoplastic foamed composite board and preparation method thereof

A fiber-reinforced, composite plate technology, applied in the direction of chemical instruments and methods, melt spinning, synthetic resin layered products, etc., can solve the problems of difficult operation, environmental hazards, high operating requirements, etc., to reduce manufacturing costs and reduce production costs , Improve the effect of mechanical properties

Inactive Publication Date: 2020-04-21
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] (2) The hot-melt resin and glass fiber are mainly combined by point connection. In order to ensure the mechanical properties, the amount of resin used is relatively large, which not only has a relatively high cost, but also limits the further development of ultra-lightweight;
[0005] (3) The amount of infiltrated air is insufficient, the degree of freedom in product design is low, and the NVH performance originally lags behind imported products
However, because the unraised foaming agent powder is very small (particle size less than 40 μm) and is explosive, in the actual production process, the powdering process mentioned in the patent CN201711451801.X involves serious dust, and the patent CN201711451806.2 mentioned The adhesion method involves uneven adhesion of the microsphere foaming agent, the volatilization of the oil agent causes the foaming agent to fall off, the foaming agent falls off seriously during the carding process, the ope

Method used

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  • Ultra-light high-strength high-sound-absorption fiber-reinforced thermoplastic foamed composite board and preparation method thereof
  • Ultra-light high-strength high-sound-absorption fiber-reinforced thermoplastic foamed composite board and preparation method thereof
  • Ultra-light high-strength high-sound-absorption fiber-reinforced thermoplastic foamed composite board and preparation method thereof

Examples

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Example Embodiment

[0038] Example 1

[0039] A kind of expandable thermoplastic fiber used to prepare fiber reinforced thermoplastic foamed composite board, composed of polypropylene fiber 1 expandable microsphere foaming agent 3, such as figure 1 Shown. The specific preparation method is as follows:

[0040] On a conventional melt spinning machine, the modified polypropylene powders of different particle sizes and the microsphere foaming agent 3 are blended and fed into the screw extruder. The temperature range of each zone on the screw screw extruder is 170-205°C. The produced melt is then extruded from the spinneret by a metering pump. After the melt is extruded, it is wound at a speed of 500-800m / min to obtain a winding wire. The winding wire is pre-drawn at 100-140℃ Hot drawing, the draw ratio is 5-9. The fiber is then heat-set at 100-120°C and retreated under stress at 90-110°C and then wound into finished filaments (referred to as foamed fibers). The foamed fibers prepared by polypropylene ...

Example Embodiment

[0045] Example 2

[0046] An ultra-light and high-strength GMT composite sheet used for the preparation of automobile bottom guards. It is composed of polypropylene fiber 1 as the bonding matrix, glass fiber 2 as the reinforcement, and the connection mode of the glass fiber 2 is changed to adjust the expansion ratio of the sheet Effective microsphere foaming agent 3 composition, such as figure 1 Shown.

[0047] The specific preparation method includes the following steps:

Example Embodiment

[0083] Example 3

[0084] An ultra-light and high-strength GMT composite sheet used for the preparation of automobile roofs. It is made of ES fiber as the bonding matrix, hemp fiber as the reinforcement and microsphere foaming with the effect of changing the connection mode of the reinforcement fibers and adjusting the expansion ratio of the sheet Agent 3 composition.

[0085] The specific preparation method includes the following steps:

[0086] (1) Blend the microsphere foaming agent 3 and polypropylene fiber 1 with the initial foaming temperature of 210℃ to form a thermoplastic foamed polypropylene fiber 1 uniformly containing the microsphere foaming agent 3. Microsphere foaming agent 3 The content is 9.5% by weight of the mass of polypropylene fiber 1;

[0087] (2) The polypropylene fiber 1 and the glass fiber 2 containing the microsphere foaming agent 3 are mixed uniformly in the ratio of 45wt%:55wt%, and are prepared by opening, mixing, carding, laying and needle punching throu...

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Abstract

The invention discloses an ultra-light high-strength high-sound-absorption fiber-reinforced thermoplastic foamed composite board and a preparation method thereof, wherein the ultra-light high-strengthhigh-sound-absorption fiber-reinforced thermoplastic foamed composite board is prepared by using a binder uniformly containing a forming agent and a fiber reinforcement body through a non-woven and continuous board-making composite process. According to the invention, plastic synthetic fibers uniformly containing a microsphere foaming agent are prepared by blending the microsphere foaming agent and thermoplastic resin powder as raw materials through a melt spinning procedure; the advantages of a non-woven process can be fully utilized to stably, continuously and efficiently produce the ultra-light high-strength GMT composite board; and the microsphere foaming agent does not fall off in a felt making link, so that the high-quality composite felt containing the microsphere foaming agent canbe prepared safely in batches without increasing additional investment such as newly increased equipment, personnel training and the like, and the manufacturing cost of the section is remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic composite materials, and in particular relates to an ultra-light, high-strength, high-sound-absorbing fiber-reinforced thermoplastic foam composite board and a preparation method thereof. Background technique [0002] Against the backdrop of global energy conservation and emission reduction, countries around the world have put forward higher standards and stricter market access permits for the automobile manufacturing industry, especially with the rapid development of new energy vehicles. Automobile lightweight is an inevitable trend of automobile development, and composite As one of the most important lightweight materials, materials have attracted much attention in the automotive industry due to their excellent performance. Lightweight glass fiber mat reinforced thermoplastic composites, referred to as lightweight GMT (Glass Fiber Mat Reinforced Thermoplastics), because of its light weight...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/18B32B27/06B32B27/32B32B37/06B32B37/10D01D5/08D04H1/46D04H1/4382B60R13/08
CPCB32B5/02B32B37/06B32B37/10B32B2262/0253B60R13/08D01D5/08D04H1/4382D04H1/46
Inventor 花东龙马国维陈磊方晶梅金波周立
Owner 浙江华江科技股份有限公司
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