PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
What is the difference between UPVC and PFA, and what is the difference between PP and PFA?
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2024-05-09
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What material is 1. PFA?
PFA, that is, perfluoroalkoxy polymer, is a high-grade fluoroplastic. It is a change from polytetrafluoroethylene (PTFE), which has many special advantages by adding perfluoroalkoxy side chains to the PTFE molecules to change their structure.
1. Chemical stability: Like PTFE, PFA is not afraid of almost all chemical potions, solvents and strong acids and alkalis, so it is called "plastic king".
2. High temperature resistance: PFA can be used for a long time at a high temperature of 260 ℃, and can withstand higher temperatures in the short term. Even at high temperatures, it is still very strong and does not conduct electricity.
3. Good processing: Compared with PTFE,PFA is easier to heat and shape, and can be easily made into various shapes, such as injection molding, extrusion, blow molding, etc. It is especially suitable for those items that require fine or complex structure.
High transparency: PFA is transparent, you can see the liquid inside, and it can also be used for optical inspection.
5. Small friction, non-stick: PFA surface slippery, friction is small, not easy to stick to other things, commonly used in the manufacture of anti-stick coating and sliding parts.
What is the difference between 2. UPVC and PFA?
UPVC, the full name of rigid polyvinyl chloride, is a commonly used plastic material. Compared with PFA, there are obvious differences in material characteristics, performance and application scope:
1. Chemical stability: UPVC has weak resistance to strong acids, strong bases and some organic solvents, and is suitable for use in relatively mild chemical environments. In contrast, PFA has greater chemical resistance and can better cope with harsh chemical environments.
2. Heat resistance: The maximum continuous use temperature of UPVC is about 60 ℃, and it is easy to soften, deform and even decompose at high temperature. PFA has excellent heat resistance and can withstand high temperatures up to 260°C without being easily affected.
3. Processing: UPVC is easy to process and manufacture by extrusion, injection molding, welding, etc., and the cost is relatively low. Although the processability of PFA is better than that of PTFE, its overall processing cost and difficulty are still higher than that of UPVC.
4. Application: UPVC is widely used in construction (such as drainage pipes, door and window frames), packaging, furniture and medical equipment industries because of its economic benefits and environmental protection. On the contrary, PFA mainly serves the high-end industrial fields with extremely high material requirements, such as semiconductor manufacturing, chemical industry, aerospace, food and medicine, etc. These fields require materials with excellent corrosion resistance, high temperature resistance, high cleanliness and high stability.
3. what is the difference between PP and PFA?
PP, also known as polypropylene, is a commonly used translucent plastic. Compared with PFA, they are very different in material characteristics and uses:
Corrosion resistance: PP can resist some acids and solvents, but the degree is far less than PFA. In the face of strong acid, alkali, alcohol, ketones and other chemical substances, the resistance of PP is much weaker.
High temperature resistance: PP can be used for a long time at most about 100 ℃, which is far lower than 260 ℃ of PFA. Once the temperature is too high, PP is easy to become soft deformation.
Strength and durability: Although PP anti-wrestling, anti-bending is good, but in terms of hardness, wear resistance and long-term stress without deformation (creep), it is not as good as PFA. Especially in high temperature environment, this gap will be more prominent.
Use field: Because PP is cheap, good processing, and all aspects of performance are passable, it is often used to make packaging, auto parts, home appliances, toys, daily necessities, etc. PFA is mainly used in industrial fields with particularly high requirements, such as chemical corrosion prevention, semiconductor equipment, medical equipment, high temperature liquid transportation, etc. These places are very demanding on material performance.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
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