Parameters and performance characteristics of PTFE rods
Physical and mechanical properties
PTFE rods (polytetrafluoroethylene rods) have the following physical and mechanical properties:
The relative density is large and almost no water absorption.
It has a very small friction coefficient and exhibits excellent lubricity. Specifically, the static friction coefficient of PTFE is smaller than the dynamic friction coefficient, and the friction coefficient remains almost unchanged from ultra-low temperature to melting point.
However, PTFE has a low hardness and is easily worn by other materials. If a layer of PTFE film is formed on the surface of the abrasive, the wear of PTFE can be reduced to a certain extent.
Thermal properties
The thermal properties of PTFE rods are as follows:
PTFE's thermal stability is extremely outstanding among engineering plastics. Between 200°C and the melting point, its decomposition rate is extremely slow and the amount of decomposition is also extremely small. After heating at 200°C for one month, the amount of decomposition is less than one millionth, which can be ignored.
PTFE is still not brittle at -250°C and can be used for a long time at -250~260°C.
Electrical properties
The electrical properties of PTFE rods include:
PTFE is a highly non-polar material with extremely excellent dielectric properties. When the temperature is above 0°C, the dielectric properties are not affected by frequency and temperature, nor by humidity and corrosive gases.
The volume resistivity and surface resistivity of PTFE are the highest among all engineering plastics. Even if it is immersed in water for a long time, it will not drop significantly. In air with 100% relative humidity, the surface resistivity remains unchanged.
When the crystallinity of PTFE is between 50% and 80%, the dielectric strength is almost independent of the crystallinity and has the lowest dielectric constant. PTFE has excellent arc resistance.
Corrosion resistance
PTFE rods have excellent corrosion resistance and can withstand the effects of all strong acids, strong oxidants, strong reducing agents and various organic solvents except molten alkali metals, fluorinated media and temperatures above 300°C.
Application fields
Due to the above performance characteristics, PTFE rods are widely used in various fields, such as:
In chemical equipment, it can be used to make linings and coatings for reactors, distillation towers and anti-corrosion equipment.
In machinery, it can be used as self-lubricating bearings, piston rings, oil seals and sealing rings, etc. The self-lubricating property can reduce the wear and heat of machine parts and reduce power consumption.
In electronics and electrical appliances, it is mainly used to manufacture various wires and cables, battery electrodes, battery separators, printed circuit boards, etc.
In medical materials, it can be used as materials for various medical devices and artificial organs by taking advantage of its heat-resistant, water-resistant and non-toxic properties.
In summary, PTFE rods have become an indispensable and important material in many industrial fields due to their unique physical, mechanical, thermal, electrical properties and excellent corrosion resistance.
Real product display
01 Exhibition
High and low temperature resistance
It has good mechanical toughness, working temperature range: -200ºC to +260ºC, does not become brittle at low temperature, does not decompose at high temperature. It can maintain 5% elongation.
02 Exhibition
Corrosion resistance
It is insoluble in most chemicals and solvents (except molten alkali metals and high-temperature fluorine gas), exhibits inertness, and is resistant to strong acids and alkalis, water, and various organic solvents.
03 Exhibition
High lubricity
The friction coefficient is as low as 0.05-0.10, the surface is anti-sticky and easy to clean, suitable for sealing viscous media. As a solid material, it has the characteristics of self-lubrication.
04 Exhibition
Good flexibility
It has small surface tension, high stability, is not easy to deform or bend, has good extensibility and high hardness.
Mechanical properties
| Properties |
unit |
Rseult |
| Apparent density |
g/cm3 |
2.30-2.50 |
| Tensile strength(min) |
MPA |
15 |
| Ultimate elongation(min) |
% |
150 |
| Working Temp |
ºC |
-180~260 |
| Melting point |
ºC |
327 |
| Produce Max Temp |
ºC |
385 |
| Compressive strength |
Pa |
(1834~2030)x104 |
| hardness HB |
|
0.13~0.16 |
| Friction coefficient |
|
14.5 |
Dielectric properties
| Properties |
unit |
Rseult |
Dielectric constant
50HZ |
|
2.1
2.1 |
Dielectric loss tangent
50HZ |
|
0.5x10-4 |
| Withstand voltage |
KV/mm |
60 |
| Volume specific resistance |
Ω.cm |
1014 |
| Surface specific resistance |
Ω |
1014 |
Thermal properties
| Propertiesu |
unit |
Rseult |
Thermal expansion coefficient
20~60ºC
20~100ºC
20~150ºC |
10-5X1/ºC10.3
|
10.5
11.4
12.8
|
Specific melting point ºC
50º
|
CJ/kg.K |
0.96x103
1.05x103 |
| Thermal conductivity |
W/m.k |
0.24 |
Cangzhou Shengxin Sealing Materials Co., Ltd. is located in Cangzhou City, Hebei Province, China, the world-famous "hometown of martial arts" and "capital of flange elbows". The company was established in 1985 and was formerly known as Cangxian Litong Sealing Products Factory. It has a history of more than 30 years of producing rubber products. After years of careful cultivation, the factory expanded its business scope in 1997 and added chemical sealing products such as metal spiral wound gaskets, asbestos gaskets, PTFE gaskets, graphite coated gaskets, toothed gaskets, heat exchanger gaskets, stainless steel ring gaskets, and packings. The company always adheres to the corporate spirit of "unity, endeavor, integrity, and innovation". With first-class product quality, good corporate reputation, and thoughtful and enthusiastic service, we welcome new and old customers at home and abroad to visit and negotiate business.
FAQ:
1. Are you a trading company or manufacturer?
A: We are a manufacturer with more than 30 years of production experience and have our own factory in Hebei.
2. Can you provide OEM or ODM service?
A: Yes, welcome.
3. Can you send me a sample? For free?
A: Yes, the sample is free, but the express fee should be on your side.
4. Is there any discount on the price you offer me?
A: The discounted price depends on the order quantity.
5. What are your payment terms?
A: 30% as deposit, 70% before delivery. Before you pay the balance,
We will show you the photos of the products and packages.
6. How about the delivery time?
A: Usually 15-30 days after receiving the 30% deposit. Samples are ready within 3 days.
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