PVDF: The Fluoroplastic for the Chemical Process Industry
We offer a wide range of materials for the chemical processing industry, but one of the most interesting is PVDF. This fluoroplastic is renowned for its excellent chemical resistance and mechanical strength. But what makes PVDF so special, and how does it compare with other materials, such as PP and PTFE?
Chemical Resistance
PVDF is particularly valued for its exceptional chemical resistance. It can withstand a wide range of acids, bases and solvents, making it an excellent choice for the chemical processing industry. For example, PVDF withstands concentrated hydrochloric acid, sulphuric acid and nitric acid, as well as bases such as sodium hydroxide and potassium hydroxide. But how well does it withstand organic solvents? Can it cope with acetone or ethanol, for instance?
We have tested PVDF against many different solvents, and the results show that it has good resistance to most common solvents. It is important to note, however, that PVDF is not completely resistant to all solvents, and it is therefore important to test the material against the specific chemicals that will be used.
Mechanical Strength
PVDF has high mechanical strength compared to other fluoroplastics such as PTFE. It has high tensile strength and high compressive strength, making it suitable for applications where high mechanical strength is a requirement. But how does it compare to PTFE? Doesn't PTFE have even higher chemical resistance?
PTFE has higher chemical resistance than PVDF, but it also has lower mechanical strength. PTFE is a soft material, with a Shore hardness of about 50 to 60° Shore D, while PVDF has a Shore hardness of about 75 to 85° Shore D. This makes PVDF a better choice for applications where high mechanical strength is needed.
Weldability
PVDF is relatively easy to weld, making it possible to create complex shapes and structures. It can be welded using standard methods such as fusion welding or ultrasonic welding. But what is the best way to weld PVDF? Which parameters are most important to control during the welding process?
We have experience of welding PVDF, and we know 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 is strong and reliable.
Temperature Range
PVDF has a wide temperature range, from -40°C to 150°C, making it suitable for applications where the temperature varies. But how does temperature affect the material's properties? Does it become weaker or stronger at high temperatures?
We have tested PVDF at various temperatures, and the results show that the material retains its mechanical strength and chemical resistance across the entire temperature range. It is important to note, however, that PVDF can become slightly softer at high temperatures, which may affect its mechanical properties.
Applications
PVDF is used in many different applications, from chemical tanks and piping systems to the semiconductor industry. It's a good choice for applications where high chemical resistance and mechanical strength are necessary. But what are the most common applications for PVDF, and how do you choose the right material for your specific application?
We have experience of working with PVDF in a wide range of applications, and we can help you choose the right material for your particular application. Our experts can advise you on how best to use PVDF, and which properties you should consider when selecting a material.
Comparison with PP and PTFE
PVDF is often compared to PP and PTFE, but it has unique properties that make it a better choice in some cases. For example, PVDF has higher chemical resistance than PP, and higher mechanical strength than PTFE. But how well does PVDF compare to other materials?
- PP: PP is a cheaper material than PVDF, but it also has lower chemical resistance and mechanical strength.
- PTFE: PTFE has higher chemical resistance than PVDF, but it also has 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’d also like 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 discuss your specific needs, please feel free to contact us. We look forward to hearing from you and helping you find the right material for your application.
PVDF: Fluorplasten för kemisk processindustri