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A kind of corrosion-resistant high-toughness high-strength composite fiber and its production process

A composite fiber and production process technology, applied in the direction of fiber treatment, fiber chemical characteristics, conjugated synthetic polymer artificial filament, etc., can solve the problem of prolonging the production cycle, poor high temperature resistance, and uneven mechanical properties of composite fiber materials To achieve the effect of improving high temperature resistance and mechanical strength, improving flexibility and corrosion resistance, and excellent self-lubricating performance

Active Publication Date: 2017-10-27
BEIJING RUNHIGH SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has two disadvantages: (1) Since the essence of the PTFE dispersion is a stable suspension of PTFE resin particles in water, and only when the temperature reaches the melting temperature of PTFE, the particles can be bonded to each other, otherwise the particles will Always in a mutually independent and dispersed state, then this method cannot make PTFE form a continuous and complete layered structure on the surface of the fiber product, and there are still many positions on the fiber surface that are exposed and not covered by PTFE
But this method also has two disadvantages: (1) it can basically make PTFE form a complete coating on the fiber surface, but because the actual temperature of the fiber product is inconsistent everywhere at high temperature, and due to the effect of gravity, it is in the The coating formed by molten PTFE on the surface of the fiber will inevitably have a uniform thickness. Although this phenomenon does not affect the alkali resistance of the composite fiber, it will make the mechanical properties of the composite fiber material uneven, and there is anisotropy and it is easy to Local stress is generated, and the effective utilization rate of PTFE raw materials is also low; (2) In the production process, additional baking and sintering processes will generate high energy consumption and inevitably prolong the production cycle: (3) Long Excessive time and high temperature treatment will also cause changes in the structure of the inorganic fibers, resulting in changes in the mechanical properties of the fibers
For fibers with poor high temperature resistance, such as glass fibers, etc., the fiber strength will be greatly reduced
[0007] A common problem with all these methods is that the fibers have already been bundled, formed and then surface treated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Prepare 100kg of composite fluororesin fiber sizing: add 40Kg of composite fluororesin, 0.5Kg of antistatic agent and a small amount of other sizing additives in sequence, and make up the rest with deionized water. After stirring evenly, add it to an oiler for drawing and coating fiber filaments; the composite fluororesin described in this example includes 30Kg of polytetrafluoroethylene and 10Kg of fluoroethylene-vinyl ether copolymer.

[0033] Step 1. Put the basalt fiber raw material into the melting furnace for melting and mixing. The molten fiber raw material flows out of the furnace body from the bushing plate, and the molten material is dispersed into many fiber monofilaments through the traction of the wire drawing machine; when setting out of the furnace body The temperature at the wire drawing port is 1350°C (the temperature is 80°C higher than the highest crystallization temperature of 1270°C for the basalt fiber melt), and the line speed of the wire drawing m...

Embodiment 2

[0042] Prepare 100kg of composite fluororesin fiber sizing: add 40Kg of composite fluororesin, 0.5Kg of antistatic agent and a small amount of other sizing additives in sequence, and make up the rest with deionized water. After stirring evenly, add it to an oiler for drawing and coating fiber filaments; the composite fluororesin described in this example includes 30Kg of polytetrafluoroethylene and 10Kg of fluoroethylene-vinyl ether copolymer.

[0043] Step 1. Put the basalt fiber raw material into the melting furnace for melting and mixing. The molten fiber raw material flows out of the furnace body from the bushing plate, and the molten material is dispersed into many fiber monofilaments through the traction of the wire drawing machine; when setting out of the furnace body The temperature at the wire drawing port is 1270°C (this temperature is equal to the highest crystallization temperature of 1270°C for the basalt fiber melt), and the line speed of the wire drawing machine ...

Embodiment 3

[0050] Prepare 100kg polytetrafluoroethylene fiber sizing agent: add 40Kg polytetrafluoroethylene, 0.5Kg antistatic agent and a small amount of other sizing agents in sequence, and make up the balance with deionized water. After mixing well, add to oiler for drawing and coating fiber filaments.

[0051] Step 1. Put the basalt fiber raw material into the melting furnace for melting and mixing. The molten fiber raw material flows out of the furnace body from the bushing plate, and the molten material is dispersed into many fiber monofilaments through the traction of the wire drawing machine; when setting out of the furnace body The temperature at the wire drawing port is 1350°C (the temperature is 80°C higher than the highest crystallization temperature of the basalt fiber melt), and the line speed of the wire drawing machine is set at 1000m / min;

[0052] Step 2. Let the fiber pass through a coating device equipped with a pre-prepared PTFE fiber sizing agent, so that the surface...

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PUM

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Abstract

The invention relates to a composite fiber and its production process, in particular to a corrosion-resistant, high-toughness, high-strength composite fiber and its production process. The composite fiber uses the inorganic fiber precursor as the core layer and the composite fluororesin as the skin layer. Firstly, the inorganic fiber raw materials are melted and mixed, and the fiber monofilament is formed under the traction of the wire drawing machine, and then the fiber is infiltrated with the composite fluororesin component. agent to form a layer of composite fluororesin coating on the surface of the inorganic fiber, and finally dry, form a film and fix it into shape. The composite fiber prepared by adopting the technological process of the present invention can significantly improve the bonding strength between the fluororesin and the inorganic fiber base material and the continuous, uniform and dense degree of fluororesin film formation, and the utilization efficiency of the fluororesin is high, and the obtained composite fiber The corrosion resistance and flexibility are excellent and stable, and the production process is simple, and the production energy consumption and cost are low.

Description

technical field [0001] The invention belongs to the field of composite fiber and its preparation, and in particular relates to a corrosion-resistant, high-toughness, high-strength composite fiber and a production process thereof. Background technique [0002] Polytetrafluoroethylene (PTFE) has excellent chemical stability and corrosion resistance, and is one of the best corrosion-resistant materials in the world today. In addition to molten alkali metals, chlorine trifluoride, chlorine pentafluoride and liquid fluorine, It is resistant to all other chemicals and does not change when boiled in aqua regia. It is widely used in various occasions that require resistance to acids, alkalis and organic solvents. At the same time, its supple long chain structure makes it have excellent flexibility. The extremely low coefficient of friction gives it excellent self-lubricating properties. In addition, it has excellent sealing, electrical insulation and good aging resistance, can wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/18D01F8/10D01D5/34
Inventor 胡斌黄思辰陈俊路彭湘丽阮军
Owner BEIJING RUNHIGH SCI & TECH