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Characteristics of PVDF (Polyvinylidene Fluoride):
PVDF mainly refers to the homopolymer of vinylidene fluoride or the copolymer of vinylidene fluoride and a small amount of other fluorine-containing vinyl monomers. Its appearance is translucent or white powder or granules.
The molecular chains are closely arranged and there are strong hydrogen bonds. In addition to good chemical corrosion resistance, high-temperature resistance, oxidation resistance, weather resistance, and radiation resistance, it also has special properties such as piezoelectricity, dielectricity, and pyroelectricity. It has good chemical resistance, processability, and resistance to fatigue and creep.
It is one of the materials for the overall valves, pipes, pipe fittings, storage tanks, and heat exchangers in the fluid handling systems of petrochemical equipment. Its good chemical stability and electrical insulation properties enable the manufactured equipment to meet the requirements of tocs and flame retardancy, and it is widely used in the storage and transportation in industries such as petrochemical, power electronics, semiconductor industry, and high-purity chemicals. Storage and transportation of high-purity chemicals in the semiconductor industry
Parameters of PVDF pipes
Characteristics |
Inspection method |
Unit of measurement |
Value
Density
ISO 1183
g/cm3
1.78
Water absorption (23℃ 24H)
ISO 62
%
＜0.04
Melt flow index (230℃, 5kg)
ASTM1238/ISO1133
g/10min
6
Vicat softening temperature
ISO 306
℃
140
HDT Bending temperature
0.46 N/mm HDT bending
temperature (0.46 N/mm
143-147
Flexural modulus
ASTM D790
MPa= N/mm2
2200
IZOD Notch Impact Strength I
ASTM D256
J/m
65
Functions of PVDF:
PVDF material has good chemical stability and super weather resistance. For general acids,
it has good anti - corrosion effects on alkalis and salts, and is especially suitable for pipelines of corrosive media such as strong acids and mixed acids.
Therefore, it is often applied in industries such as petrochemical, power electronics, semiconductor industry, and high - purity chemicals.
PVDF has very good resistance to ultraviolet rays and high - energy radiation.
The materials for the pipelines of high - purity water and ultrapure water are all PVDF pipes. Due to the good chemical stability, cleanliness, smoothness and other properties of PVDF pipes,
they have been widely used in the microelectronics industry, achieving good social and economic benefits.
PVDF pipes have good chemical stability, chemical corrosion resistance and thermal stability.
It can be used at-62℃ - +150℃ temperature range for long - term use, resistant to all salts ,
acids, alkalis, aromatics, halogens and other media.
It has good flame - retardant, fatigue - resistant, not easy to break, wear - resistant and self - lubricating properties, and is a good insulating material.
It has high mechanical strength, high tensile strength and high compressive strength. The wear - resistant performance is outstanding. When temperature and pressure exist simultaneously, its performance is far better than other plastic pipes. It is mainly used for the transportation of corrosive media in fields such as waste acid recovery and regeneration in the smelting industry.
PVDF pipes Non - contact infrared (IR) welding
Non - contact infrared (IR) welding is a butt - welding connection method of non - contact convective heating.
Use the heat radiated by the infrared heating plate to heat the connection surfaces of pipes and fittings to the specified temperature for a specified time.
Reach the molten state, and then press the connection surfaces of pipes and fittings together in a pressurized way.
During the heating process of the connection surfaces of pipes and fittings by infrared welding, they do not directly contact the heating plate. So the weld after welding is smaller, and the joint is more beautiful.
Infrared welding is suitable for ultra - pure water pipelines with high purity requirements or biopharmaceutical systems.
1. The welding part does not stick to the heating plate.
2. The heating plate will not contaminate the welding surface.
3. No need for the process of leveling the pipe end face
4. More uniform radiant heating
5. The welding flow is very thin, and the weld bead flange is smaller
6. The process is controlled by software and has repeatability
7. Keep the welding environment temperature at 5 - 40 degrees
8. Only pipes and fittings with the same wall thickness can be welded
9. The MFR range of the parts to be welded is 0.4 - 0.8g/10min (Test conditions: 190 degrees/5kg)
Company Profile:
Henan Senanshun Pipe Industry Co., Ltd. Our company specializes in UPVC, CPVC, ABS,
CL-PVC, HT-PVC, PP, PPH, PVDFABS, PC, PA, POM,
PETP, PBT, PEI, PES, PSU, PPS, COC, LCP, PEEK, PI,
PE, PVC and other plates, bars and plastic pipeline system development, sales, installation one-stop service
The company has rich construction experience and strong technical strength. Our company's products are sold well at home and abroad for their reliable quality, reasonable design
reasonable, beautiful appearance, fast installation and other advantages, and are widely used in environmental protection, oil
fields, hot springs, pharmaceuticals, semiconductors, food, chlor-alkali, fire protection, steel, nuclear power, bioengineering,
Electronics, power, metallurgy, municipal, hotels, water treatment industries, etc.
The product standards of Henan Senanshun Pipe Industry Co., Ltd. include DIN, ANSI (SCH80, SCH40), BS, JIS, CNS, etc.
We adhere to integrity as the foundation, take quality as the core, and seek development through reputation. We always establish long - term and friendly trade relations with domestic and foreign customers on the basis of equality and mutual benefit.
We warmly welcome Chinese and foreign customers to contact us by phone or letter to discuss business.
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