PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
The difference between new material and recycled material of PTFE sheet
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-11-25
Visits:
The new material PTFE plate is made of suspension polymerized PTFE resin by plunger extrusion. Among the known plastics, polytetrafluoroethylene has good chemical resistance and dielectric properties. has
Low friction coefficient, wear resistance, chemical corrosion resistance, good sealing, no hydrolysis, no hard and other excellent properties. Gasket seals and lubricating materials for work in various media, and at various frequencies
The use of electrical insulation, capacitor media, wire insulation, electrical instrument insulation, etc.
Figure 1: PTFE sheet Source: Dankai
The technical indicators of pure material PTFE plate are as follows:
(1) The color of the plate is the natural color of resin.
(2) The texture shall be uniform, the appearance shall be smooth, and there shall be no defects such as cracks, bubbles, delamination, mechanical damage, and knife marks.
(3) A slight cloud-like tightness is allowed.
(4) No more than 1 non-metallic impurity with a diameter of 0.1-0.5mm and no more than 1 non-metallic impurity with a diameter of 0.5-2mm is allowed in an area of 10 × 10cm.
(5) The density is 2.1-2.3T/m3.
Figure 2: PTFE sheet Source: Dankai
Pure material PTFE plate (PTFE plate) use:
1. It is suitable for the lining and gasket of reaction kettle, storage tank, valve and container working under various corrosive media.
2. It can be used as the lining of anti-corrosion pipeline, the coating of anti-corrosion roller, the oil-free lubrication and anti-sticking material of mechanical sliding track.
3. It can be made into a large number of fluorine plastics such as insulating parts used at various frequencies and has a wide range of uses.
4, the construction industry is mostly used as a stair pad.
Figure 3: PTFE sheet Source: Dankai
In recent years, PTFE has been listed as an ideal insulation material for cables and wires. The reason is that PTFE itself has low loss, friction resistance, anti-aging, dielectric constant, thermal stability and certain
Flexibility, PTFE porous design can reduce the loss and distortion rate, it is also a good filling medium material, is widely used in computers, telecommunications, national defense and many other pick.
The area of war.
So, what are the differences between pure PTFE materials and recycled materials?
1. First of all, the appearance: look at the color and brightness of the products. There is a slight green light in the white of the products made of brand-new materials, and there are always some white rigid appearance or yellow feeling when adding back materials. The surface is not as light as the new products.
Clean and bright.
2. Identification of mechanical operation: when machining new material products, the cutting surface is fine and smooth, and the products added with recycled materials are not smooth and are always Mao Mao.
3. Test equipment inspection: density/tensile strength/elongation at break, etc. The index of adding and returning materials must be worse than that of new materials.
4. The new PTFE factory particle size is 20-50 microns, and the particle size of recycled materials is difficult to reach this particle size, and various modified fillers are often added in the application process of PTFE, plus poly four
Fluorine fluoride with charge, in the application process is always easy to adsorb various impurities, resulting in the composition of the recycled material is very complex, the performance of PTFE recycled material itself has also changed, due to the shadow of the above factors
The sintering property of the recycled material is greatly reduced, so the recycled material is easy to crack.
The difference between PTFE and recycled PTFE (recycled material) is mainly in performance, because the performance of recycled material is much worse than that of new material, because the connecting chain of recycled material has been destroyed, electrical
The characteristics will change a lot. There are also different degrees of impurities in the recycled materials, which will have a great impact on electrical characteristics, such as electric breakdown value. Colors will also be different.
The advantages of PTFE plate pure material:
1. Strong acid and alkali resistance, almost all chemical media, except for molten alkali metals and elemental fluorine.
2. Outstanding aging resistance, good weather resistance.
3. The friction coefficient is low, not easy to bond, easy to install and disassemble.
4. The product is clean and can be used for sealing parts that are not allowed to be contaminated, such as food and medicine.
5. High mechanical strength, good turning performance and easy processing into different sealing products.
6. The linear expansion coefficient is low, and it is easy to produce creep or stress relaxation phenomenon when cold flow is high temperature after compression, which is not suitable for high temperature and high pressure parts.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
PTFE, various, performance, strong acid resistance, aging resistance, weather resistance, non-stick, low friction coefficient, high mechanical strength
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