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Preparation method of polytetrafluoroethylene composite steel pipe

A technology of polytetrafluoroethylene and composite steel pipes, which is applied to pipes, rigid pipes, mechanical equipment, etc., can solve problems such as poor mechanical properties, achieve the effects of improving service life, reducing uneven force, and solving the problem of cavity gaps

Pending Publication Date: 2022-04-05
无锡恒丰祥钢管科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems in the prior art, the present invention provides a preparation method of polytetrafluoroethylene composite steel pipe, which solves the problem of poor mechanical properties of the existing polytetrafluoroethylene composite pipe, and utilizes the microporous characteris

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] A polytetrafluoroethylene composite steel tube is an inner lining of puffed polytetrafluoroethylene, and a methyl silicone resin is an adhesive layer; the preparation method comprises the steps of:

[0022] Step 1, adding the polytetrafluoroethylene powder to ethanol and stir well, then put the wet ball milling treatment for 1 h in the ball mill, the constant temperature drying to obtain polytetrafluorine fine powder; the mass of the polytetrafluoroethylene powder and ethanol The ratio is 5: 1, the stirring speed is 1000 r / min, the pressure of the wet ball mill is 0.3 MPa, the temperature is 30 ° C; the temperature of the constant temperature is 80 ° C;

[0023] Step 2, the sodium chloride is added to anhydrous ethanol to stir well, then uniformly disperse with the polytetrafluoroethylene fine powder ultrasound, resulting in a mixed slurry, the concentration of sodium ethanol in anhydrous ethanol is 40g. / L, the stirred temperature is 10 ° C; the mass ...

Example Embodiment

[0030] Example 2

[0031] A polytetrafluoroethylene composite steel tube is an inner lining of puffed polytetrafluoroethylene, and a methyl silicone resin is an adhesive layer; the preparation method comprises the steps of:

[0032] Step 1, the polytetrafluoroethylene powder is added to ethanol and stir well, then put the wet ball milling treatment for 3 h in the ball mill, and the constant temperature drying is obtained by polytetrafluoroethylene powder; the mass of the polytetrafluoroethylene powder and ethanol The ratio is 5: 3, the stirring speed is 2000 r / min, the pressure of the wet ball mill 0.6 MPa, the temperature is 50 ° C; the temperature of the constant temperature is 90 ° C;

[0033] Step 2, the sodium chloride is added to anhydrous ethanol to stir well, and then uniformly disperse with the polytetrafluoroethylene fine powder ultrasound, obtain a mixed slurry, the concentration of sodium chloride in anhydrous ethanol is 80g. / L, the stirred temperature is 30 ° C; t...

Example Embodiment

[0040] Example 3

[0041] A polytetrafluoroethylene composite steel tube is an inner lining of puffed polytetrafluoroethylene, and a methyl silicone resin is an adhesive layer; the preparation method comprises the steps of:

[0042] Step 1, the polytetrafluoroethylene powder is added to ethanol and stir well, and then put the wet ball milling treatment for 2 h in the ball mill, and the constant temperature is dry to obtain polytetrafluoroethylene fine powder; the mass of the polytetrafluoroethylene powder and ethanol The ratio is 5: 2, the stirring speed is 1500 r / min, the pressure of the wet ball mill is 0.5 MPa, the temperature is 40 ° C; the temperature of the constant temperature is 85 ° C;

[0043] Step 2, add sodium chloride to anhydrous ethanol to stir well, then uniformly dispersion with the polytetrafluoroethylene fine powder ultrasound, resulting in a mixed slurry, and the concentration of sodium chloride in anhydrous ethanol is 60g. / L, the stirred temperature is 20 ...

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Abstract

The invention belongs to the technical field of pipelines, and particularly relates to a preparation method of a polytetrafluoroethylene composite steel pipe, the polytetrafluoroethylene composite steel pipe takes expanded polytetrafluoroethylene as a lining film and methyl silicone resin as an adhesion layer, and the preparation method is provided. The problem that an existing polytetrafluoroethylene composite pipe is poor in mechanical performance is solved, the micropore characteristic of expanded polytetrafluoroethylene is utilized, the anti-corrosion protection requirement of polytetrafluoroethylene is met, air pressure shock absorption of bubble permeation can be formed, the problem of uneven stress caused by bubbles is solved, and the service life of polytetrafluoroethylene in liquid transmission is prolonged.

Description

technical field [0001] The invention belongs to the technical field of pipelines, and in particular relates to a preparation method of polytetrafluoroethylene composite steel pipes. Background technique [0002] With the continuous improvement of the use of steel pipes, the performance requirements of steel pipes are also continuously improved. Among them, in order to improve the corrosion resistance of steel pipes and meet the transmission requirements of corrosive liquids, PTFE-lined steel pipes have emerged as the times require. At present, there are many types of PTFE composite steel pipes on the market, with uneven performance, and molded steel-lined PTFE straight pipes are the main ones. The excellent non-stickiness of polytetrafluoroethylene itself promotes the analysis of the gap between the steel pipe and the polytetrafluoroethylene lining layer in the composite steel pipe prepared by this process. The gap causes it to be uniformly compressed and easy to fall off. ...

Claims

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Application Information

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IPC IPC(8): B29D23/00F16L9/147F16L58/10
Inventor 张义山张仁杰
Owner 无锡恒丰祥钢管科技有限公司
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