High-strength and flame-retardation thermoplastic composite material for subway tunnel platform, and preparation method of composite sheet thereof

A composite material and thermoplastic technology, applied in the field of polymer materials, can solve the problems of non-recyclable thermosetting composite materials, poor control of formaldehyde content, low molecular formaldehyde volatilization, etc., and achieve the effect of light weight, easy replacement, and fire protection safety

Active Publication Date: 2013-04-24
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phenolic composite materials have good flame retardancy, but the formaldehyde content is not well controlled, and low-molecular-weight formaldehyde will volatilize and pollute the environment
At the same time, thermoset composites are not recyclable

Method used

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  • High-strength and flame-retardation thermoplastic composite material for subway tunnel platform, and preparation method of composite sheet thereof
  • High-strength and flame-retardation thermoplastic composite material for subway tunnel platform, and preparation method of composite sheet thereof
  • High-strength and flame-retardation thermoplastic composite material for subway tunnel platform, and preparation method of composite sheet thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] Composite material of the present invention and sheet material preparation method thereof, such as figure 1 shown, including:

[0054] Using a twin-screw extruder to melt and blend the component A in claim 1 according to the ratio of raw materials and extrude it to the dipping die;

[0055] Continuously feeding the glass fiber of component B according to claim 1 into the impregnation die, impregnating and coating the melt formed by component A, to form a flame-retardant reinforced thermoplastic composite material;

[0056] The composite material is continuously drawn to obtain a composite material flat strip;

[0057] warp weaving the webbing strips into a sheet;

[0058] A number of woven sheets are superimposed and hot-pressed into a sheet to obtain a flame-retardant reinforced composite sheet for the manufacture of the tunnel platform.

[0059] According to the present invention, the preparation method of the composite board is as follows: after homogeneously mixi...

Embodiment

[0065] Resin and additives such as flame retardants are homogeneously mixed and then added to a twin-screw extruder for continuous melt blending and extruding to the die head. The glass fiber is continuously fed into the die head, impregnated and coated by the melt, and reinforced by long glass fibers by traction. Flame retardant thermoplastic composite tape. Twin-screw blending extrusion temperature: 230-270°C, choose the appropriate extrusion temperature according to different base materials.

[0066] Strips are woven into sheets by a knitting machine

[0067] Overlay molding of multi-layer sheets to obtain the required sheet

[0068] Molding process conditions: temperature: 240-280°C, heating time: 2-3h, pressure: 7-10MPa, the molding temperature and pressure can be selected according to the different resins of the body and the thickness of the board.

[0069] The plate is engraved and sampled, and the mechanical properties and flame retardancy of the material are tested ...

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Abstract

The invention provides a high-strength and flame-retardation thermoplastic composite material for a subway tunnel platform. The composite material comprises a component A and 40-60 parts by weight of a component B which is glass fibers, and the component A comprises 100 parts by weight of a thermoplastic resin, 10-20 parts by weight of a flame retardant, 2-5 parts by weight of a flame retardation synergist, 5-10 parts by weight of a flexibilizer and 0.1-1.0 part by weight of an antioxidant. The subway tunnel platform made through using the sheet of the composite material has a high strength, and can guarantee no fracture or collapse in the people walking process. The composite material has a very good flame retardation property and can guarantee the cable safety and the fireproof safety. Compared with steel, the composite sheet has the advantages of light weight, high strength, corrosion resistance, easy replacement and the like. Compared with a thermosetting composite material, the thermoplastic composite material has the advantages of good low temperature toughness, good safety and good reliability. The invention also provides a preparation method of the composite sheet, and the subway tunnel platform using the composite sheet.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-strength flame-retardant thermoplastic composite material for a subway tunnel platform and a preparation method for a composite plate thereof. Background technique [0002] In recent years, my country's high-speed railway and subway construction have developed rapidly. In the subway tunnel design, evacuation platforms are set on both sides of the track, and the platforms have two functions. One is to quickly evacuate the passengers through the platform when the train breaks down, so that the passengers can quickly run out of the tunnel. The second is that the platform support frame can be used as a cable support frame in addition to being used as a platform support frame. [0003] Therefore, the subway tunnel platform must meet the two major safety requirements of passage and cable support. On the one hand, it is required to have sufficient strength to keep people from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L23/00C08L51/06C08K13/04C08K5/03C08K5/136C08K3/22C08K3/38C08K7/14B29C70/40E21F11/00H02G9/08
Inventor 邓凯桓王雄刚
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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