PVDF: the fluoroplastic for the chemical process industry
We offer a range of materials for the chemical process industry, but one of the most interesting is PVDF. This fluoroplastic is known for its excellent chemical resistance and mechanical strength. But what makes PVDF so unique, and how does it compare to other materials like PP and PTFE?
Chemical resistance
PVDF is known for its exceptional chemical resistance. It can withstand a range of acids, bases, and solvents, making it an excellent choice for the chemical process industry. For example, PVDF can withstand concentrated hydrochloric acid, sulfuric acid, and nitric acid, as well as bases like sodium hydroxide and potassium hydroxide. But how well does it withstand organic solvents? Can it withstand for example acetone or ethanol?
We have tested PVDF against a range of solvents, and the results show that it has excellent resistance to most common solvents. However, it is important to note that PVDF is not completely resistant to all solvents, and it is therefore important to test the material against the specific chemicals to be used.
Mechanical strength
PVDF has high mechanical strength compared to other fluoroplastics like PTFE. It has high tensile strength and a high elongation at break, making it an excellent choice for applications where high mechanical strength is required. But how does it compare to PTFE? Does PTFE not have an even higher chemical resistance?
Yes, PTFE has an even higher chemical resistance than PVDF, but it also has a lower mechanical strength. PTFE is a very soft material, with a Shore hardness of around 50-60 Shore D, while PVDF has a Shore hardness of around 75-85 Shore D. This makes PVDF a better choice for applications where high mechanical strength is required.
Weldability
PVDF is a material that is easy to weld, making it possible to create complex shapes and structures. It can be welded using common welding methods such as for example melt welding or ultrasonic welding. But how do you weld PVDF in the best way? What parameters are most important to control during the welding process?
We have extensive experience of welding PVDF, and we can attest that it is a relatively easy material to work with. The most important thing is to control the temperature and pressure during the welding process, to ensure that the weld joint becomes strong and reliable.
Temperature range
PVDF has a wide temperature range, from -40°C to 150°C, making it an excellent choice for applications where the temperature varies. But how does the temperature affect the material's properties? Does it become weaker or stronger at high temperatures?
We have tested PVDF at different temperatures, and the results show that the material retains its mechanical strength and chemical resistance over the entire temperature range. However, it is important to note that PVDF can become slightly softer at high temperatures, which can affect its mechanical properties.
Applications
PVDF is used in a range of applications, from chemical tanks and pipes to the semiconductor industry. It is an excellent choice for applications where high chemical resistance and mechanical strength are required. But what are the most common applications for PVDF, and how can you choose the right material for your specific application?
We have experience of working with PVDF in a range of applications, and we can help you choose the right material for your specific application. Our experts can give you advice on how you can use PVDF in the best way, and what properties you should look for when choosing a material.
Comparison with PP and PTFE
PVDF is often compared to PP and PTFE, but it has a range of unique properties that make it a better choice for certain applications. For example, PVDF has a higher chemical resistance than PP, and a higher mechanical strength than PTFE. But how well does PVDF stand up in comparison to other materials?
- PP: PP is a cheaper material than PVDF, but it also has a lower chemical resistance and mechanical strength.
- PTFE: PTFE has a higher chemical resistance than PVDF, but it also has a lower mechanical strength and is more expensive.
We believe that PVDF is an excellent choice for applications where high chemical resistance and mechanical strength are required. But we also want to hear from you: what are your needs and requirements, and how can we help you choose the right material?
If you want to know more about PVDF or want to discuss your specific needs, you are welcome to contact us. We look forward to hearing from you and helping you find the right material for your application.
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