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Method for manufacturing light GMT sheet material

A sheet, lightweight technology, used in non-woven fabrics, textiles and papermaking, fiber processing, etc., can solve the problems of difficult bonding between resin matrix and glass fiber interface, high resin melt viscosity, and difficult thermal impregnation. Fast production speed, light weight and high rigidity for sound insulation, good impregnation uniformity

Inactive Publication Date: 2009-05-27
黄云清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The GMT material is produced by hot-pressing process by melting and impregnating glass fiber felt at high temperature. Since polypropylene is a non-polar high polymer and has no affinity with glass fiber, it is difficult to bond the interface between the resin matrix and glass fiber because of the high viscosity of the resin melt. , Poor fluidity, so it is even more difficult to thoroughly hot dipping. It is one of the technical bottlenecks restricting the industrial production and marketing of GMT materials in my country.

Method used

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  • Method for manufacturing light GMT sheet material
  • Method for manufacturing light GMT sheet material

Examples

Experimental program
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specific Embodiment approach

[0027] figure 2 For the structural representation of the lightweight GMT plate prepared by the present invention, refer to figure 2 , the lightweight GMT sheet includes: a surface covering layer 4, an intermediate layer 5a, 5b, a sandwich layer 6, and a bottom layer 7, wherein the intermediate layer is electrostatic dry impregnated glass fiber chopped strand mat (mixed mat), and the sandwich layer is selected from thermoplastic glass One of the roll materials such as fiber cotton, honeycomb foam material, thin aluminum sheet, etc., the bottom layer is non-woven fabric.

[0028] The specific implementation process is shown in the following examples:

Embodiment 1

[0030] Produce lightweight GMT panels for car roofs.

[0031] (1) Material preparation: ① According to the above product requirements, produce 1 roll of E-glass fiber chopped chopped mixed mat uniformly impregnated by electrostatic dry method (specification: 1050g / m 2 , 60m long, width 1.32m), ②PP film 60m (50g / m 2 , width 1.3m), ③ polyester non-woven fabric 60m (100g / m 2 , width 1.3m);

[0032] (2) E-glass fiber chopped chopped mixed mat uniformly impregnated by unwinding electrostatic dry method;

[0033] (3) The alkali-free glass fiber chopped mixed mat uniformly impregnated by electrostatic dry method is baked, plasticized and melted at low temperature (120-140°C), medium temperature (140-170°C) and high temperature (170-210°C) in an oven. Melt impregnation. In the oven, the running speed of the glass fiber mixed felt is ≤8m / min, and the moisture exhaust outlet is opened at the outlet of the high temperature area to remove the smoke. After the glass fiber mixed felt co...

Embodiment 2

[0036] Production of lightweight GMT panels for passenger compartments.

[0037] (1) Material preparation: ① 2 rolls of E-glass fiber chopped chopped mixed mat uniformly impregnated by electrostatic dry method, each 60m (specification: 600g / m 2 , width 1.1m), ②PP film 60m (50g / m 2 , width 1m), ③ polyester non-woven fabric 60m (50g / m 2 , width 1m)); ④ thermoplastic glass fiber cotton 60m (500g / m 2 , width 1m));

[0038] (2) E-glass fiber chopped chopped mixed mat uniformly impregnated by unwinding electrostatic dry method;

[0039] (3) Unwind thermoplastic fiberglass wool on the impregnated even alkali-free glass fiber chopped strand mat of above-mentioned unwinding according to product structure;

[0040] (4) Unwind the alkali-free glass fiber chopped chopped mixed mat uniformly impregnated by electrostatic dry method on the above-mentioned product;

[0041] (5) The three-layer material is subjected to composite double-sided needling, so that the material is entangled int...

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Abstract

The invention discloses a method for manufacturing a light GMT board. The method mainly comprises the following steps: making semi-finished felt by a method of mixing chopped modified alkali-free glass fiber and chopped modified polypropylene fiber; producing an evenly impregnated glass fiber chopped mixed felt by dusting, electrostatic impregnation by a dry method and compound needle punching, and making the light GMT board by baking plasticization, fusing impregnation, compound filming, non-woven fabrics covering, continuous rolling, cooling, shaping and edge trimming. The method has the advantages of low energy consumption, high yield, good impregnation uniformity and rapid continuous production speed, the board structure is changed by controlling the content of the glass fiber and resin so that the cost is greatly reduced, and the method is applicable to industrialized production. Meanwhile, the light GMT board can replace wood or steel for environment-friendly recycle. The board also has a sandwich froth layer which enhances expanding, thermal insulation and sound insulation performances of the board, thus achieving unification of light weight and high rigidity.

Description

technical field [0001] The invention relates to a manufacturing method of light GMT boards, especially a method for manufacturing lightweight GMT boards using glass fiber chopped strand mat impregnated by electrostatic dry method, and relates to related office partition boards, vehicle and ship box boards, container boards, building boards, etc. Decorative products and manufacturing fields. Background technique [0002] The material of GMT (Glass mat reinforced thermoplastics, GMT) produced abroad is that in the process of producing glass fiber, the single filament glass fiber is directly covered with polypropylene melt, and then made into continuous glass fiber needle mat directly. Production of GMT materials, the technology of impregnating glass fibers by melting method is controlled by foreign patents. [0003] figure 1 Schematic diagram of the structure of the lightweight GMT sheet prepared for the traditional process, such as figure 1 As shown, domestic production of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/00D06M17/00D04H1/48
Inventor 黄云清黄亦赛陈彦
Owner 黄云清
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