PP: The Chemical-Resistant All-Rounder
We offer many different plastic materials at PlastShop.se, but one of the most useful and chemical-resistant is polypropylene (PP). People often use this material in environments where chemicals are present, but what makes PP so special? In this article, we'll go through the properties and applications of PP, and we'll examine the differences between PP-H, PP-C, and PP-R.
What is polypropylene?
PP is a thermoplastic that's lightweight, chemical-resistant, and has a low absorption capacity. This makes it suitable for use where chemicals and liquids are present. But what type of PP should you choose? There are different variants, such as PP-H, PP-C, and PP-R, which all have their own properties.
PP-H, PP-C, and PP-R: What's the difference?
PP-H is a homopolymer variant of PP, which means it consists of a single type of monomer. This gives PP-H high chemical resistance and low absorption capacity. PP-C is a copolymer variant that consists of a mixture of monomers. This gives PP-C a slightly lower chemical resistance, but it's still very resistant to many chemicals. PP-R is a block copolymer variant that consists of a combination of PP-H and PP-C. This gives PP-R high chemical resistance and low absorption capacity, as well as high mechanical strength.
The type of PP you should choose depends on the application. If you need high chemical resistance and low absorption capacity, PP-H may be the best choice. If you need a slightly lower chemical resistance, but still high mechanical strength, PP-C may be a better choice. If you need both high chemical resistance and high mechanical strength, PP-R may be best.
Chemical Resistance
One of the most important properties of PP is its chemical resistance. PP resists many chemicals, such as acids, bases, and solvents. However, remember that if PP is exposed to a chemical it isn't resistant to, the material can break down. This can lead to the material losing its strength and chemical resistance. Therefore, always check the chemical resistance of PP before you use it.
Weldability
Another important property of PP is that it's weldable. You can weld PP with methods such as hot air welding and ultrasonic welding. This makes it possible to create complex shapes and structures. When you weld PP, remember that the material can become brittle if exposed to high temperatures. Therefore, always follow the recommendations for welding PP and use the right equipment and technique.
Applications
People use PP in many different areas, such as tanks, ventilation, and chemical processing. This is due to its high chemical resistance and low absorption capacity, which makes it a suitable choice where chemicals and liquids are present. But why is PP the first choice in chemical environments? One reason is that PP is very chemical resistant, which means it can withstand many different chemicals without breaking down. Another reason is that PP is lightweight and has a low absorption capacity, making it suitable where weight and absorption capacity are important. Finally, PP is also affordable.
PP is also used in the food industry for packaging and containers, as well as in healthcare for medical instruments and equipment. One reason for this is that PP is hygienic and easy to clean. In addition, PP is chemical resistant and affordable.
Temperature Limits
You can use PP in temperatures up to 65° Shore D, which means you can use it in applications where high temperatures are present. However, if PP is exposed to higher temperatures, it can break down and lose its strength and chemical resistance. Therefore, always check the temperature limits before you use PP.
Are you wondering if PP is the right material for your project? Feel free to contact us, and we'll help you find the right one!
PP: The Chemical-Resistant All-Rounder