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Modified preparation technology for light GMT sheet material

A preparation process and plate technology, which is applied in the field of preparation technology of lightweight GMT plates, can solve the problems of complex preparation process, large glass fiber damage and obvious orientation, and achieve simple preparation process, small glass fiber damage and high utilization rate of raw materials. Effect

Inactive Publication Date: 2014-04-23
合肥杰迈特汽车新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the dry process is that it can card fibers as long as 100-150 mm, and does not emit waste gas or waste water. The production process is environmentally friendly, but the preparation process is complicated, the glass fiber is damaged, and the orientation is obvious, and the mechanical properties of the sheet are anisotropic. , and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Using 60kg of non-alkali glass fiber and 40kg of modified polypropylene fiber as raw materials, the non-alkali glass fiber is first opened through an opener, and then the modified polypropylene is prepared into a thick resin block; For the mold of the heating system, ring grooves are engraved on the mold to accelerate the flow of resin. The loosened alkali-free glass fiber is placed at the bottom of the mold, and then polypropylene thick resin blocks are laid on the glass fiber, and then sealed with a vacuum bag. In a hot environment, vacuum technology is used to suck the resin from top to bottom, and the polypropylene is fully infiltrated with glass fibers to obtain a base mat, and then the base mat is double-sidedly needled and reinforced with a needling machine, with a needle punching density of 60 punches up and down. / cm 2 , the needling frequency is 600 needles / min, the needling depth is 7mm downward and 3mm upward; the reinforced base felt is sent to a double-st...

Embodiment 2

[0023] Using 70kg of alkali-free glass fiber and 30kg of modified polypropylene fiber as raw materials, the alkali-free glass fiber is first opened through an opener, and then the modified polypropylene is prepared into a thick resin block; The mold of the heating system, grooves are carved on the mold to speed up the flow of resin, the loosened alkali-free glass fiber is placed at the bottom of the mold, and then polypropylene thick resin block is laid on the glass fiber, and then sealed with a vacuum bag. Vacuum technology is used to suck the resin from top to bottom in the environment, and the polypropylene is fully soaked in glass fiber to make the base mat; then the base mat is double-sidedly needled and reinforced with a needle punching machine, and the needle punching density is 60 punches / cm 2 , the needling frequency is 600 needles / min, the needling depth is 8mm downward and 4mm upward; the reinforced base felt is sent to a double-steel belt continuous press, compos...

Embodiment 3

[0026] Using 80kg of non-alkali glass fiber and 20kg of modified polypropylene fiber as raw materials, the non-alkali glass fiber is first opened through an opener, and then the modified polypropylene is prepared into a thick resin block; The mold of the heating system, grooves are carved on the mold to speed up the flow of resin, the loosened alkali-free glass fiber is placed at the bottom of the mold, and then polypropylene thick resin block is laid on the glass fiber, and then sealed with a vacuum bag. Vacuum technology is used to suck the resin from top to bottom in the environment, and the polypropylene is fully soaked in glass fiber to make the base mat; then the base mat is double-sidedly needled and reinforced with a needle punching machine, and the needle punching density is 60 punches / cm 2 , the needling frequency is 600 needles / min, the needling depth is 9mm downward and 5mm upward; the reinforced base felt is sent to a double-steel belt continuous press machine, ...

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Abstract

A modified preparation technology for a light GMT sheet material comprises: employing base-free glass fiber and low-melting-point modified polypropylene according to a certain weight ratio as raw materials, employing vacuum infiltration technology, placing base-free glass fiber at the bottom of a mold, then paving polypropylene thick resin blocks on glass fiber, sealing with a vacuum bag, in hot environment, employing vacuum technology to suck resin from top to bottom, wherein the mold comprises an injection system, an exhaust system and a heating system, and is carved with grooves for accelerating resin flow, guaranteeing resin smooth flow, exhausting all gas in the mold cavity and thoroughly infiltrating fiber. The preparation technology is high in efficiency, low in equipment cost and small in energy consumption; the whole preparation technology is free of pollution, small in glass fiber damage and high in raw material utilization rate; and the preparation process is simple.

Description

[0001] technical field [0002] The invention relates to the field of interior materials for automobiles and other vehicles, in particular to an improved preparation process of light-weight GMT plates. [0003] Background technique [0004] Lightweight GMT sheet is a thermoplastic glass fiber reinforced polypropylene composite sheet. It is a new type of composite material composed of continuous glass fiber mat and thermoplastic resin. It has high strength, high impact toughness, good bearing capacity, and high temperature resistance. Light weight, recyclable, not easy to deform, good sound absorption and sound insulation, no smell and so on. The surface of the sheet can be covered with different surface coverings according to actual requirements, such as: adhesive film, barrier film, decoration, rigid polypropylene film, non-woven fabric, reinforcing material or no covering. Widely used in transportation, construction, aviation and other fields. [0005] At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/28
CPCB29C70/44
Inventor 周建国吉宏伟李维栋
Owner 合肥杰迈特汽车新材料有限公司
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