High Purity PCTFE Rod for Chemical Industry

Product Description

Product Description

Performance Category	Specific Indicator	Unit	Value	Test Standard/Remarks
Physical Properties	Density	g/cm³	2.10~2.20	ASTM D792
	Water Absorption	%	<0.01	ASTM D570-81
	Coefficient of Linear Expansion	K-¹	4.5×10-5 ~ 7×10-5	ASTM D696
Mechanical Properties	Tensile Strength	MPa	≥30 (max. 35)	ASTM D638
	Elongation at Break	%	20~100	ASTM D638
	Hardness (Shore D)	—	90	ASTM D2240
Thermal Properties	Melting Point	℃	208~212	—
	Long-term Service Temperature	℃	-196~125 (up to 150 for short-term use)	—
	Heat Deflection Temperature (0.455MPa)	℃	126	ASTM D648
	Thermal Conductivity	W/m·K	0.84	ASTM C177
Electrical Properties	Dielectric Strength	KV/mm	≥15	ASTM D149
	Volume Resistivity	Ω·cm		—
Other Properties	Flame Retardancy Rating	—	Non-flammable	ASTM D635
	Gas Permeability	cc·cm/sq.cm·sec·atm		—

Specification Type	Thickness (mm)	Length × Width (mm)	Tolerance Range	Remarks
Standard Molded Sheet	3~50	300×300, 500×500	Thickness: ±3%~5%; Length & Width: ±5%	Mainstream conventional size
	1~100	1220×2440, 615×1220	Thickness: ±5%; Length & Width: ±5%	Common specification for imported sheets
Customized Specification	Max. 50	Max. 500×500	Adjustable on demand	Customized for special working conditions, e.g., oversized sheets, ultra-thin sheets

Material Introduction

PCTFE is a semicrystalline fluoropolymer synthesized via free-radical polymerization of  CTFE monomers. Launched in the mid-20th century, it integrates PTFE's extreme chemical resistance with enginee 

•Chemical Resistance: Near-inert to concentrated acids, alkalis, solvents, and corrosives (except molten alkali metals/fluorinating agents), outperforming PTFE in aromatic hydrocarbons.

•Barrier Performance: Ultra-low permeability ( 0.01 cm³·mm/(m²·day·atm); water vapor: 0.005 g·mm/(m²·day))—ideal for hermetic protection. •Mechanical & Thermal Stability: Tensile strength 35–45 MPa, retains 80% strength at -100°C, flexible down to -200°C; operates -200°C to 120°C (short-term 150°C) with minimal creep.

•Safety & Compliance: UL94 V-0 non-flammable (LOI 65%), FDA/ISO 10993 biocompatible, compatible with autoclaving/EtO sterilization.

•Electrical Insulation: Dielectric constant 2.3–2.5 (1 MHz), dielectric strength 20–25 kV/mm—stable across temp/frequency ranges. Processing Methods Processable via injection molding (230–260°C), extrusion (films/tubes), machining (precision parts), and compression molding (thick components), with controlled cooling to avoid shrinkage. Key Applications •Aerospace: Seals, wire insulation, satellite electronics packaging (resists jet fuels/vacuum). •Medical: Sterilizable components, drug blister packs, implantable devices (biocompatible). •Chemical Processing: Valve liners, tank liners, semiconductor etching chamber parts (corrosion-resistant). •Electronics: PCB moisture barriers, high-frequency connectors (low permeability/dielectric stability). •Cryogenics: Liquid gas handling valves/gaskets (retains flexibility at -200°C). Competitive Advantages Vs. PTFE: Higher rigidity/creep resistance; vs. PFA/FEP: Superior barrier performance; vs. engineering plastics: Extreme chemical/thermal stability. Ideal for high-stakes environments demanding reliability.

FAQ

Q1:What are the key advantages of PCTFE compared to other fluoropolymers like PTFE?

A1:PCTFE has higher compressive strength, better dimensional stability, lower moisture absorption, and superior gas barrier properties than PTFE, while maintaining excellent chemical resistance and low-temperature performance.

Q2:In which industries and applications is PCTFE most commonly used?

A2: PCTFE is widely used in aerospace, cryogenic systems, medical devices, semiconductor components, chemical processing, and high performance sealing applications requiring extreme stability.

Q3:Is PCTFE suitable for injection molding or only machining?

A3:PCTFE can be processed by both injection molding and compression molding, but due to its high melt viscosity, it is also commonly produced as rods, sheets, and tubes for precision machining into finished parts.