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Method for enhancing transverse strength of FRP (fiber reinforced plastics) pultruded profile by utilizing weaving technology

A technology of pultrusion profile and strength, applied in the direction of coating, etc., can solve the problem of weak transverse strength of FRP pultrusion profile, and achieve the effect of enhancing transverse strength

Active Publication Date: 2014-04-09
HARBIN FRP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the weak transverse strength of FRP pultruded profiles prepared by existing methods, and provide a method for enhancing the transverse strength of FRP pultruded profiles by using weaving technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0022] Specific Embodiment 1: This embodiment is a method of using weaving technology to enhance the lateral strength of FRP pultruded profiles, which is specifically completed according to the following steps:

[0023] 1. Preparation of resin matrix: ①Weigh 100 parts of resin, 1-3 parts of initiation system, 10-60 parts of filler and 0.2-2.5 parts of release agent according to parts by weight; ②Weigh 100 parts of step ① Resin, 1-3 parts of initiation system, 10-60 parts of filler and 0.2-2.5 parts of release agent are placed in a stirring vessel, and stirred for 30-120 minutes at a stirring speed of 100r / min-500r / min Pour into the dipping tank to obtain a resin matrix containing resin, initiation system, filler and release agent;

[0024] The resin described in step 1. 1. is unsaturated polyester resin, epoxy resin, vinyl ester resin or phenolic resin;

[0025] The initiation system described in step one ① is one or more mixtures in benzoyl peroxide, acid anhydrides, amines ...

specific Embodiment approach 2

[0041] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: in step ①, ① Weigh 100 parts of resin, 1 part to 2.5 parts of initiating system, 10 parts to 50 parts of filler and 0.2 parts of ~ 2 parts mold release agent. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0042] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is: Step 1 ① In ① weigh 100 parts of resin, 1 part to 3 parts of initiation system, and 20 parts to 50 parts of filler in parts by weight And 0.5 to 2 parts of release agent. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for enhancing the transverse strength of an FRP (fiber reinforced plastics) pultruded profile by utilizing a weaving technology, relates to a method for enhancing an FRP material, and aims to solve the problem of low transverse strength of the FRP pultruded profile prepared by a conventional method. The method comprises the following steps of 1, preparing a resin substrate; 2, drying and arranging fibers; 3, wetting the fibers; 4, pre-forming longitudinal fibers; 5, weaving a surface layer; 6, pre-forming a woven layer; and 7, performing solidification shaping. The method for enhancing the transverse strength of the FRP pultruded profile by utilizing the weaving technology has the advantages that the transverse tensile strength of the prepared FRP pultruded profile reaches 50 to 90MPa, and is improved by 20 to 50 percent compared with that of the FRP pultruded profile prepared by the conventional method; the longitudinal tensile strength of the FRP pultruded profile reaches 600 to 900MPa; the surface layer fibers of the pultruded profile form a spiral trajectory, and are interwoven into a seamless whole.

Description

technical field [0001] The present invention relates to methods of reinforcing FRP materials. Background technique [0002] Fiber reinforced resin matrix material, abbreviated as FRP material. FRP material is an anisotropic material. Its tensile strength in the longitudinal and fiber directions is very high, which can reach 2 to 4 times that of steel bars, but the strength in the transverse direction and perpendicular to the fiber direction is weak. Traditional FRP pultrusion profiles are produced along the fiber direction, and the transverse strength is mainly obtained by resin bonding force. This pultrusion production method makes the disadvantage of weak transverse strength of FRP materials more obvious. At the same time, the weakening of transverse force is also certain. To a certain extent, it also affects the mechanical properties such as longitudinal tensile strength, so the traditional FRP pultruded profiles cannot meet the requirements of high transverse strength o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52B29C70/54B29B15/10
CPCB29B15/10B29C70/52B29C70/525
Inventor 孙云龙王菲梁钒栾世琳
Owner HARBIN FRP INST
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