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Surface-treating method for PTFE/aramid fiber woven pad

A surface treatment and aramid fiber technology, which is applied in the surface treatment field of PTFE/aramid fiber woven gaskets, can solve problems such as poor adhesion, improve adhesion performance, highlight chemical activity, improve softness and stickiness Effect

Active Publication Date: 2015-01-21
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a surface treatment method of PTFE / aramid fiber braided liner, to solve the problem of poor adhesion between the existing PTFE / aramid fiber braided liner and the inner surface of the spherical plain bearing outer ring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The surface treatment method of the PTFE / aramid fiber braided liner of the present embodiment may further comprise the steps:

[0022] 1) Take the PTFE / aramid fiber woven liner, immerse it in the ultrasonic treatment tank containing the rare earth solution, turn on the ultrasonic generator for ultrasonic treatment, the ultrasonic power is 100W, the frequency is 50KHz, the temperature of the rare earth solution is 25°C, and the ultrasonic treatment The processing time is 30min;

[0023] 2) Take the liner after ultrasonic treatment and fully rinse it with distilled water. The temperature of the water used for rinsing is 50°C for 5 minutes. After rinsing, dry the liner in an oven at 80°C for 30 minutes. , that is, the surface-treated pad.

[0024] Wherein, the rare earth solution is composed of the following components by weight percentage: lanthanum chloride 0.5%, ammonium chloride 0.2%, nitric acid 0.2%, urea 0.1%, and the balance is deionized water.

Embodiment 2

[0026] The surface treatment method of the PTFE / aramid fiber braided liner of the present embodiment may further comprise the steps:

[0027] 1) Take the PTFE / aramid fiber woven liner, immerse it in the ultrasonic treatment tank containing the rare earth solution, turn on the ultrasonic generator for ultrasonic treatment, the ultrasonic power is 250W, the frequency is 40KHz, the temperature of the rare earth solution is 25 ℃, ultrasonic The processing time is 60min;

[0028] 2) Take the liner after ultrasonic treatment and fully rinse it with distilled water. The temperature of the water used for rinsing is 50°C for 10 minutes. After rinsing, dry the liner in an oven at 100°C for 20 minutes. , that is, the surface-treated pad.

[0029] Wherein, the rare earth solution is composed of the following components by weight percentage: 2% of lanthanum oxide, 0.06% of ammonium chloride, 0.5% of nitric acid, 0.7% of urea, and the balance is deionized water.

Embodiment 3

[0031] The surface treatment method of the PTFE / aramid fiber braided liner of the present embodiment may further comprise the steps:

[0032] 1) Take the PTFE / aramid fiber woven liner, immerse it in the ultrasonic treatment tank containing the rare earth solution, turn on the ultrasonic generator for ultrasonic treatment, the ultrasonic power is 250W, the frequency is 40KHz, the temperature of the rare earth solution is 25 ℃, ultrasonic The processing time is 90min;

[0033] 2) Take the liner after ultrasonic treatment, and fully rinse it with distilled water. The temperature of the water for rinsing is 50°C for 15 minutes. After washing, dry the liner in an oven at 120°C for 5 minutes. , that is, the surface-treated pad.

[0034] Wherein, the rare earth solution is composed of the following components by weight percentage: 2% of lanthanum oxide, 0.06% of ammonium chloride, 0.5% of nitric acid, 0.7% of urea, and the balance is deionized water.

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Abstract

The invention discloses a surface-treating method for a PTFE / aramid fiber woven pad. The surface-treating method comprises the following steps of (1) immersing the PTFE / aramid fiber woven pad in a rare earth solution, and carrying out ultrasonic treatment; and (2) washing the pad after ultrasonic treatment with water, and drying to obtain a surface-treated pad. According to the surface-treating method for the PTFE / aramid fiber woven pad, the rare earth solution is used as an ultrasonic treatment medium to carry out ultrasonic modification on the pad; by virtue of intense cavitation effect produced by ultrasonic waves, free energy on surfaces of aramid fibers is reduced and the rare earth solution can infiltrate the surfaces of the fibers rapidly and thoroughly; due to a special 4f electronic shell structure, the rare earth element has the characteristics of relatively small electronegativity and prominent chemical activity, so that oxygen-containing active groups in the modifier can be introduced to the surfaces of the fibers; concentration of the active groups on the surfaces of the fibers is increased; and adhesion properties of the pad is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of liner self-lubricating joint bearings, and in particular relates to a surface treatment method for a PTFE / aramid fiber braided liner. Background technique [0002] Spherical plain bearings, also known as spherical plain bearings, are mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. According to whether it needs to add lubricant during operation, spherical plain bearings can be divided into non-self-lubricating spherical plain bearings and self-lubricating spherical plain bearings. Pad self-lubricating spherical plain bearings are made by bonding a self-lubricating material in the form of a pad between the inner and outer rings of the spherical plain bearing. Among them, the liner is usually a polymer plastic and plastic-based composite material, so the liner self-lubricating joint bearing has the characteristics of high load capacity, lon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/06D06M10/08C09J5/02
Inventor 邱明苗艳伟李迎春陈龙卢建军
Owner HENAN UNIV OF SCI & TECH
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