FRP (fiber reinforced plastic) rib preparation method and FRP rib prepared thereby

A rib, pre-forming technology, applied in the preparation of thermoplastic resin FRP rib, FRP rib field, can solve the problems of high production cost, high energy consumption, high equipment requirements, achieve low production cost, low resin high temperature degradation rate, molding simple craftsmanship

Active Publication Date: 2011-11-09
SHANGHAI KNP CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems of high equipment requirements, high energy consumption, high production cost, and severe degradation of the resin in a high-temperature molten state for a long time due to the process of impregnating thermoplastic resin in the preparation of FRP bars in the prior art. problem, and provide a method for preparing FRP bars with simple molding process, low energy consumption and low production cost, and the present invention also provides the FRP bars prepared by the method

Method used

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  • FRP (fiber reinforced plastic) rib preparation method and FRP rib prepared thereby
  • FRP (fiber reinforced plastic) rib preparation method and FRP rib prepared thereby

Examples

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preparation example Construction

[0029] A preparation method for FRP bars, using thermoplastic resin fibers 2 and inorganic reinforcing fibers 1 as raw materials, comprising the following steps:

[0030] A. Drying: The thermoplastic resin fiber 2 is dried to reduce its water content to below 40ppm. The best drying condition is to dry the thermoplastic resin fiber 2 under a vacuum condition with a temperature of 115-160°C. Avoid bubbles when the fibers are melted at high temperature, and better ensure the performance of FRP bars.

[0031] B. Bundling: The dried thermoplastic resin fibers 2 and inorganic reinforcing fibers 1 are uniformly bundled at cross intervals to better bond the thermoplastic resin fibers 2 and inorganic reinforcing fibers 1, so as to enhance the durability and strength of the FRP bars and other performance.

[0032] C. Winding: The bundled fiber bundles are wound through monofilament fibers to form a thread structure. On the one hand, it can ensure the shape of the FRP tendon, and on the...

Embodiment 1

[0045] The thermoplastic resin fiber 2 in this embodiment is PP fiber, that is, polypropylene fiber, and the inorganic reinforcing fiber 1 is glass fiber. Firstly, the polypropylene fiber is vacuum-dried at 115° C. for 12 hours to reduce its water content to below 40 ppm, wherein the content of the polypropylene fiber is 10% of the total weight of the raw material.

[0046] Bundle the dried polypropylene fibers and glass fibers in a crossed and evenly spaced manner to ensure that the polypropylene fibers are evenly distributed in the FRP tendon body. The diameter of the prepared FRP tendon rod is 16mm; The silk fiber is wound to form a thread structure on the surface of the FRP tendon; the FRP tendon is pulled into the pre-forming drying tunnel by the drafting machine, and the FRP tendon passes through the pre-forming preheating zone, extrusion zone, and pre-forming zone in sequence. The temperatures are 165°C, 170°C, and 175°C respectively, and the time for the FRP bars to st...

Embodiment 2

[0049] In this embodiment, the thermoplastic resin fiber 2 is polyester (polyester) fiber, and the inorganic reinforcing fiber 1 is glass fiber. First, vacuum-dry the polyester fiber at 140° C. for 12 hours to reduce the water content to below 40 ppm, wherein the content of the polyester fiber is 15% of the total weight of the raw material.

[0050] Bundle the dried polyester fibers and glass fibers in a crossed and evenly spaced manner to ensure that the polyester fibers are evenly distributed in the FRP bar body, and the diameter of the prepared FRP bars is 20mm; the bundled fiber bundles are made of high-strength monofilament Filament winding forms a thread structure on the surface of the FRP tendons; the FRP tendons are drawn into the pre-forming drying tunnel by a drafting machine, and the FRP tendons pass through the pre-forming preheating zone, extrusion zone, and pre-forming zone in sequence. The temperature of each zone They are 240°C, 250°C, and 260°C respectively, a...

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Abstract

The invention discloses an FRP (fiber reinforced plastic) rib preparation method. The preparation method solves the technical problems that in the prior art, the requirement for the equipment is high, the energy consumption is large, the production cost is high and the resins are in a high-temperature molten state for a long time to cause serious degradation and the like due to adoption of the process of dipping thermoplastic resins when the FRP rib is prepared. In order to solve the technical problems, the adopted technical scheme comprises the following steps of: taking thermoplastic resin fibers and inorganic reinforcing fibers as raw materials, and then carrying out the steps of drying, bundling, winding, drawing, preforming, forming, cooling, curing and cutting and the like. The adopted technical scheme has the advantages that the preparation process is simple, the energy consumption is less and the production cost is low. The invention also provides the FRP rib prepared by the method, and can be rapidly and widely applied in various engineering.

Description

technical field [0001] The invention relates to a method for preparing a building material FRP tendon used in civil engineering, in particular to a method for preparing a thermoplastic resin FRP tendon. [0002] The present invention also relates to the FRP bars prepared by the above method. Background technique [0003] FRP bars, as a rock-soil reinforcement bar system for civil engineering, have a broad market and application value, and are related to the safety of the country and people's lives and property. Therefore, the product must have high strength, corrosion resistance, easy forming and low cost. The advantages of cost can be effectively applied in civil engineering. [0004] The existing FRP rib forming process includes yarn feeding, dipping, monofilament winding, pre-curing, curing molding, drafting, cutting and other processes. The resin generally used is thermosetting resin. The disadvantage of this forming process is that there are rods in the forming process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C53/56B29C70/28E21D21/00E02D5/74E02D17/20
Inventor 张杰曾志海胡勇何唯平
Owner SHANGHAI KNP CHEM
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