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Method for preparing leached fibre felt by electrostatic dry method

A fiber mat and electrostatic technology, which is used in the field of thermoplastic or thermosetting fiber mat preparation, can solve the problems of inability to bond, difficult to mix resin powder uniformly, and difficulty in industrialized production, and achieves rapid impregnation, low energy consumption, and low investment. small effect

Inactive Publication Date: 2009-04-29
黄云清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Changhai Group adopts the powder-sprinkling method to produce continuous glass fiber mat. The powder-sprinkling process is difficult to achieve uniform mixing of resin powder in the mat body, let alone point bonding rather than surface bonding between the glass fiber and resin powder interface. Therefore, it is difficult to realize the direct production of GMT materials by plasticizing and baking the glass fiber mat
[0005] In the production process of thermally bonding fiber mats by dusting, many binders are difficult to be compatible with resins, resulting in delamination when the material is molded. Therefore, when making thermoplastic reinforced composite materials, the binder or solvent must be removed first. This makes it difficult for industrial production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for preparing leached fibre felt by electrostatic dry method
  • Method for preparing leached fibre felt by electrostatic dry method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Material preparation: 50kg of modified non-alkali glass fiber roving (diameter: 13μm, 1200tex glass fiber surface has been processed by the manufacturer according to requirements), 50kg of modified polypropylene fiber filaments (diameter: 20μm), 25kg of polypropylene powder (particle size 10μm.), polypropylene non-woven fabric 50m2 roll (25g / m 2 );

[0029] (2) Place the modified glass fiber roving and the modified polypropylene fiber evenly on the creel, and send them to the molding section of the chopped strand mat production line at the same time according to the ratio of the above-mentioned materials for chopping, blending, and chopping. The length is 60-90mm, and then settle and lay the net to form a fluffy and evenly mixed glass fiber blank mat;

[0030] (3) Import the polypropylene powder into the powder spreading device 1 and press 250g / m on the surface of the glass fiber blank felt 2 Sprinkle powder to spread a uniform layer of resin powder on the surface...

Embodiment 2

[0040] (1) Material preparation: 50kg hemp fiber (diameter: 15μm), 50kg modified polypropylene fiber (diameter: 30μm), 25kg polypropylene powder (particle size 10μm.), polypropylene non-woven fabric 50m 2 rolls (25g / m 2 );

[0041] (2) Place the hemp fiber and the modified polypropylene fiber evenly on the creel, and send them into the molding section of the chopped strand felt production unit at the same time according to the ratio of the above-mentioned stock preparations, and chop and blend them. The chopped length is 60-90mm, Then settle and lay the net to form a fluffy and evenly mixed hemp fiber blank felt;

[0042] (3) Import the polypropylene powder into the powder spreading device 1 and press 250g / m on the surface of the hemp fiber blank felt 2 Sprinkle powder to spread a uniform layer of resin powder on the surface of the blank felt;

[0043](4) Start the high-voltage DC generator 3 and pass through the electrostatic generator 2 to energize the negative electrode p...

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Abstract

The invention discloses a method for preparing an electrostatic dry impregnated fiber felt, which comprises the following main steps: (1) two kinds of different fiber yarns are chopped, blended, and settled for mesh paving to form a fluffy and evenly-blended blank felt; (2) resin powder is scattered on the surface of the blank felt according to the mixture ratio; (3) the blank felt is subjected to dry impregnation under the action of an electric field through an impregnating machine; (4) an interface and the bottom of the blank felt are paved with non-woven fabrics, and the double-sided needling is performed for reinforcement; and (5) the felt is formed through edge cutting and rolling. The method has the advantages that the method overcomes the technical defects existing in the prior powder scattering process, realizes the even impregnation of the resin powder to the fiber felt, has small investment and low energy consumption, does not use solvents and adhesives, relates to broad industry products, is suitable for industrialized production, is more scientific and reasonable compared with the prior chopped strand felt preparation technology, and provides a novel process route for manufacturing thermoplastic reinforced fiber felts.

Description

technical field [0001] The invention relates to a preparation method of thermoplastic or thermosetting fiber felt, which is a new technology for preparing reinforced composite materials, and relates to related GMT products and manufacturing fields of navigation, aviation, vehicles, containers, textiles and architectural decoration. Background technique [0002] At present, the domestic textile industry mostly adopts the saturated impregnation method. Its process flow: the formed fiber mat is conveyed into the impregnation tank filled with adhesive liquid, after the fiber mat passes through the adhesive liquid, the excess adhesive is removed by rollers or liquid suction devices, and the adhesive is bonded by the drying system. The agent is plasticized by heat. The product contains difficult-to-recycle solvents that make material recycling difficult. [0003] The glass fiber of GMT (Glass mat reinforced thermoplastics, GMT) material is produced abroad, and the surface of the...

Claims

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Application Information

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IPC IPC(8): D04H1/48B32B5/16B32B7/08D04H1/60
Inventor 黄云清黄亦赛
Owner 黄云清
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