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FEP & PFA (Fluoropolymer)
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Fluoropolymer FEP & PFA (Neoflon, Polyflon)
FEP and PFA are fluoropolymers that are ideal for use in injection molded biomedical devices and thin-walled, complex parts. Learn more about the properties of FEP and PFA and their different applications below.
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Fluoropolymers
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Fluoropolymers are a great choice for parts that must perform in unique conditions
When you need parts that can withstand extreme operating conditions, fluoropolymers may fit the bill. Parts like roofing membranes, fuel tubes, biomedical devices, and wires are all common applications of fluoropolymers.
To meet these demanding and various expectations, our supplier DAIKIN has developed two series of fluoropolymers:
– POLYFLON Series, a variety of high-performance PTFE. Available in fine powder, molding powder or dispersion used for tubes, membranes, etc.
– NEOFLON Series, a complete array of melt-processable fluoropolymers such as FEP, PFA, ETFE, PCTFE, suitable for pipe, sealant, roofing, etc.
FEP Fluoropolymer:
Fluorinated ethylene propylene (FEP plastic) was created as a melt-processable fluoropolymer alternative to PTFE. FEP has several advantages to PTFE. FEP has low gas and permeability properties, can be extruded in long continuous lengths, and possesses excellent UV transmission rating. FEP is also suitable for use in a biomedical setting and is gamma sterilizable.
All of these attributes and more make FEP an ideal fluoropolymer for a diverse range of applications from environmental monitoring equipment to medical devices and electronics. Because it is a thermoplastic, FEP is also easily heat-formed, tipped, tapered, flared, and flanged.
PFA Fluoropolymer:
Perfluoroalkoxy (PFA plastic) is a melt-processable fluoropolymer that combines many of the best traits of PTFE and FEP. At 500 °F (260 °C), PFA has a higher service temperature than FEP and maintains its mechanical integrity in extreme temperatures even when exposed to caustic chemicals. PFA has greater tensile strength than PTFE and a smoother surface finish than both PTFE and FEP.
PFA’s is a top choice in semiconductor, chemical, oil and gas, aerospace, automotive, pharmaceutical, and medical industries. This fluoropolymer has excellent lubricity, clarity, flexibility, and chemical resistance, making it a versatile choice.
Fluoropolymer Selection Guide
| PTFE | PFA | FEP | ETFE | EFEP | CPT | PCTFE | VT | ||
|---|---|---|---|---|---|---|---|---|---|
| Chemical field | Chemical resistance + Heat resistance |
● | ● | ● | ● | ● | ● | ||
| Chemical resistance + Mechanical property |
● | ● | ● | ● | |||||
| Electronics field | Electrical property | ● | ● | ● | ● | ● | |||
| Electrical property + mechanical property |
● | ● | |||||||
| Industry field | Low friction | ● | ● | ● | ● | ||||
| Low expansion coefficient | ● | ||||||||
| Other fields | Weatherability | ● | ● | ● | ● | ● | ● | ● | ● |
| Flame retardancy | ● | ● | ● | ● | ● | ● | ● | ● | |
| Optical transparency | ● | ● | ● | ● | ● | ● | ● | ||
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FEP vs PFA Fluoropolymers
FEP and PFA are injection moldable, highly inert, compatible with most organic compounds, have good barrier properties and high continuous use temperatures. They are virtually impervious to chemical, enzyme and microbiological attack and stiffer than PTFE. The non-stick properties of these polymers can also be useful to reduce liquid, gel and powder adhesion. Fluoropolymers in general, have good dielectric properties and are resistant to atmospheric degradation.
While significantly less expensive than PFA, FEP is very difficult to mold due to its low viscosity. However, Performance Plastics has developed proprietary tooling and processes enabling the injection molding of small, thin-walled, complex FEP parts.
- More transparent than PTFE (not injection moldable)
- Better gas and vapor permeability properties than PTFE
- Maximum working temperature 400°F
- Approximately 1/3 the cost of PFA
PFA is significantly easier to mold than FEP, however, it is significantly more expensive.
- Higher continuous service temperature than FEP
- Maximum working temperature 500°F
- Difference in molecular structure gives PFA improved flow, creep resistance and thermal stability.
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Fluoropolymers in Biomedical Devices
We are experts in injection molding biomedical devices made of fluoropolymers.
Potential applications include:
- IV system components
- Liquid and powder inhalation devices
- Storage bottles, containers, vials and closures
- Plastic pumps and fittings
- Syringes and plungers
- Tube fittings
- Surgical equipment
- Valves and seals
- Forceps and clip applicators
- Instrument handles
Learn more about Fluoropolymers
Injection Molded PFA & PPSU in the Lithium Ion Battery
Designing and Molding Complex Plastic Parts
Tight Tolerances & Material Selection
Plastic Injection Molding vs 3D Printing
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Let us solve your toughest engineering problems.
We work with our customers to design solutions utilizing the capabilities of ultra and high-performance thermoplastic resins, including but not limited to PEEK, Torlon®, Ultem®, EXTEM®, PFA, FEP, PVDF, ETFE. Capitalizing on advanced injection molding techniques most appropriate for the project, we leverage our vast experience and suite of thermoplastic design and manufacturing skills to solve engineering challenges and deliver components that enhance product performance.
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Contact an Engineer to Get Started
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