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Preparation method of high-sound-absorption ultralight high-strength GMT composite board

A composite sheet and high-absorption technology, which is applied in chemical instruments and methods, lamination devices, lamination auxiliary operations, etc., can solve the problems of insufficient air infiltration, product design freedom and NVH performance backwardness, etc., to reduce the amount of materials , degree of freedom and NVH performance improvement, and the effect of mechanical performance improvement

Active Publication Date: 2017-02-22
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It effectively solves the problems of traditional lightweight GMT, such as the difficulty of further ultra-lightweight, insufficient air infiltration, product design freedom and NVH performance lag far behind foreign imported products, etc.

Method used

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  • Preparation method of high-sound-absorption ultralight high-strength GMT composite board
  • Preparation method of high-sound-absorption ultralight high-strength GMT composite board
  • Preparation method of high-sound-absorption ultralight high-strength GMT composite board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A high-sound-absorbing ultra-light and high-strength GMT composite sheet for preparing automobile bottom guards, which consists of thermoplastic polypropylene fibers as a bonding matrix, glass fibers as a reinforcing material, and the expansion of the sheet can be adjusted by changing the lattice point connection mode between the glass fibers Specific efficacy of microsphere foaming agent 3 composition, such as figure 1 As shown, and made into ultra-light and high-strength GMT composite sheet for automobile bottom guard plate by hot pressing, the surface density of the composite sheet is 1000g / m 2 . Its specific preparation method comprises the following steps:

[0037] (1) 60wt% thermoplastic polypropylene fibers and 40wt% glass fibers are uniformly mixed in proportion, and through carding, laying and needle punching, a blended composite fiber mat is obtained;

[0038] (2) The blended composite fiber felt is passed through the water-based mixture made of 3wt% water-s...

Embodiment 1

[0064] Example 1 Introduce microsphere foaming agent 3 inside the existing light-weight GMT composite board felt net. The introduction of microsphere foaming agent 3 makes the connection mode between glass fibers more diverse. In addition to traditional point connections, microspheres The foaming agent 3 binds the glass fibers around it as a connecting bridge, and the microsphere foaming agent 3 is connected to each other again, as figure 2 As shown, these diverse connection methods have fundamentally changed the internal felt network structure of the composite board, so the prepared bottom protection product has significantly improved mechanical properties compared with Comparative Example 1 at the same density, and compared with the traditional high-density GMT composite board. The mechanical properties of ratio 2 are equivalent, so that it can reduce the amount of its own materials and achieve the purpose of ultra-lightweight under the premise of ensuring the safety and str...

Embodiment 2

[0066] A high-sound-absorbing ultra-light and high-strength GMT composite sheet for preparing automotive roof components, which is composed of thermoplastic ES fiber as a bonding matrix, plant fiber as a reinforcing material, and the expansion ratio of the sheet can be adjusted by changing the connection mode between the two lattice points of the reinforcing fiber Composed of 3 effective microsphere foaming agents, and made into ultra-light and high-strength GMT composite sheets for automobile roofs by hot pressing, the surface density of the composite sheets is 600g / m 2 . Its specific preparation method comprises the following steps:

[0067] (1) 48wt% thermoplastic ES fiber and 52wt% plant fiber are mixed evenly in proportion, and the blended composite fiber mat is obtained through carding, laying and needle punching;

[0068] (2) The blended composite fiber felt is passed through a water-based mixture made of 8wt% water-soluble acrylate polymer, 5wt% aluminate coupling age...

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Abstract

The invention discloses a preparation method of a high-sound-absorption ultralight high-strength GMT composite board. According to the preparation method, a microsphere foaming agent is introduced into a GMT felt screen through an impregnation technology in the back pass of an existing light GMT dry combing felt forming technology, the expansibility of the board is adjusted by changing a supporting method of connection of lattice points among reinforced fibers and combining the expanding characteristic of the microsphere foaming agent, the obtained board can be expanded in secondary forming, and then the thickness reaches 5-10 times that of the original thickness; pressing fixing is conducted as needed by adjusting the expanded compression ratio according to the product performance requirements, and automotive internal and external ornament products with different strength, rigidity and sound resistance characteristics are obtained. Therefore, the problems that in a traditional light GMT product, further ultra-lightweight design is difficult, the impregnated air volume is insufficient, and the design freedom degree and the NVH performance of the product are far behind of those of foreign imported products are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic composite materials for interior and exterior decoration of automobiles, and in particular relates to a method for preparing a high-sound-absorbing ultra-light and high-strength GMT composite sheet for preparing interior and exterior decorations of automobiles, and using the composite sheet to prepare automobile interior and exterior decorations method of the piece. Background technique [0002] Lightweight glass fiber mat reinforced thermoplastic composite sheet, referred to as lightweight GMT (Glass fiber Matreinforced Thermoplastics), is a new type of composite material composed of continuous glass fiber mat and thermoplastic resin, because of its light weight, environmental protection, sound absorption and heat insulation , high strength and toughness, excellent chemical corrosion resistance and environmental adaptability, it has become the most actively developed variety in today's auto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/06B32B37/08B32B37/10B32B37/12B32B38/08
CPCB32B37/06B32B37/08B32B37/10B32B37/1207B32B38/08B32B2038/0084
Inventor 方晶梁静静丁文鹏梅金波周立何斐鲁马国维
Owner 浙江华江科技股份有限公司
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