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Method for preparing polytetrafluoroethylene-based three-dimensional orthogonal composite material

A PTFE-based, composite material technology, applied in fiber types, fiber processing, textiles, etc., can solve problems such as poor consistency and poor mechanical properties, and achieve good bonding performance, low cost, and good deformation recovery sexual effect

Inactive Publication Date: 2010-07-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absence of pressure or vacuum assistance makes this composite less consistent, which explains its inferior mechanical properties to conventionally crafted composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Method for making three-dimensional orthogonal woven glass fiber fabric reinforced polytetrafluoroethylene composites

[0023] Glass fibers were selected as the fibers of the three-dimensional composite reinforcement, and were woven into three-dimensional orthogonal fabrics on a three-dimensional positive interweaving machine. Polytetrafluoroethylene, a thermoplastic polymer, was used as a matrix for curing three-dimensional orthogonal fabrics, and the solid content (%wt) of the polytetrafluoroethylene dispersion used was 60%.

[0024] Pretreatment: Place the three-dimensional orthogonal glass fiber woven fabric in an oven, dry it at 80 °C for 1 hour, remove the moisture inside the three-dimensional orthogonal woven fabric, and weigh; soak the dried three-dimensional woven fabric in In the polytetrafluoroethylene dispersion, and flattened with a roller for 1 hour, then the front and back of the three-dimensional orthogonal woven fabric was turned over, flattened with a ...

Embodiment 2

[0028] Basalt fiber was selected as the fiber of the 3D composite material reinforcement, and woven into a 3D orthogonal fabric on a 3D positive interweaving machine. Polytetrafluoroethylene, a thermoplastic polymer, was used as the matrix for curing the three-dimensional orthogonal fabric, and the solid content (%wt) of the polytetrafluoroethylene dispersion was 70%.

[0029] Pretreatment: Place the three-dimensional orthogonal basalt fiber woven fabric in an oven, dry it at 80°C for 1 hour, remove the moisture inside the three-dimensional orthogonal woven fabric, and weigh; the dried three-dimensional orthogonal woven fabric Immerse in the polytetrafluoroethylene dispersion, roll flat with a roller, keep it for 1 hour, then turn the front and back of the three-dimensional orthogonal woven fabric, roll flat with a roller, keep it for 1 hour, and then place it in an oven to dry at 80 °C After 2 hours, weigh; repeat this process until the weight of the three-dimensional orthogo...

Embodiment 3

[0033]Aramid fiber was selected as the fiber of the 3D composite material reinforcement, and woven into a 3D orthogonal fabric on a 3D positive interweaving machine. Polytetrafluoroethylene, a thermoplastic polymer, was used as the matrix for curing the three-dimensional orthogonal fabric, and the solid content (%wt) of the polytetrafluoroethylene dispersion liquid was 50%.

[0034] Pretreatment: The three-dimensional orthogonal aramid woven fabric was placed in an oven, dried at 80°C for 1 hour to remove the moisture inside the three-dimensional orthogonal woven fabric, and weighed; the dried three-dimensional orthogonal woven fabric was Immerse in the polytetrafluoroethylene dispersion, and roll it flat with a roller for 1 hour, then turn the front and back of the three-dimensional orthogonal woven fabric, flatten it with a roller, keep it for 1 hour, and then place it in an oven to dry at 80 °C After 2 hours, weigh; repeat this process until the weight of the three-dimensio...

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Abstract

The invention relates to a method for preparing polytetrafluoroethylene-based three-dimensional orthogonal composite material, which includes the following steps: (1) a three-dimensional orthogonal woven fabric is dried and weighed; the three-dimensional orthogonal woven fabric is then socked in polytetrafluoroethylene dispersing agent, evened up by a roller, turned over, evened up, dried and weighed; the process is repeated; after weighing, the presoaked three-dimensional orthogonal woven fabric is put into a die, and receives the pressure of 30 MPa to 40MPa; after evening, the evened presoaked three-dimensional orthogonal woven fabric is put into an oven with the temperature of 80 DEG C, and the temperature is increased to 200 DEG C; (2) the temperature continues to increase for agglomeration; (3) the three-dimensional orthogonal woven fabric is cooled along with the oven, taken out and trimmed, and thereby the polytetrafluoroethylene-based three-dimensional orthogonal composite material is obtained. The invention has the advantages of simplicity, low cost and stable performance, and is suitable for industrialized production; the invention can be used to shape structures related to intelligent composite material; the resin content in the obtained composite material is high and stable, and the bonding property of the fibers and the polytetrafluoroethylene resin is good.

Description

technical field [0001] The invention belongs to the field of preparation of polytetrafluoroethylene composite materials, in particular to a preparation method of a polytetrafluoroethylene three-dimensional orthogonal composite material. Background technique [0002] Polytetrafluoroethylene (PTFE) resin has high temperature resistance, oxidation resistance, insolubility, excellent chemical stability and dielectric properties, and has become one of the indispensable and important materials in almost all industrial sectors such as chemical and mechanical industries. PTFE resin is mostly powder or dispersion liquid, with extremely high relative molecular weight and high crystallinity, with a melting point of 327 ° C. Due to the strong F-C bond in its molecular structure, its excellent performance is widely used in national defense, Aerospace, petrochemical, electronics, machinery and other fields. Although PTFE is a thermoplastic resin, due to its extremely high melt viscosity,...

Claims

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Application Information

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IPC IPC(8): D03D15/00D03D15/02D02G3/04D06M15/256D06M101/00D06M101/36D03D15/242D03D15/267D03D15/283
Inventor 周冬春赵达姚澜张文文吴昊蒋牧文张坤周楠婷姜茜张博文罗瑞邱夷平
Owner DONGHUA UNIV
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