Teflon® PFA 345
fluoropolymer resin
Extrusion and Molding Resin

General Purpose：Extrusion and injection molding resin. Intermediate flow rate with higher stress crack resistance than 340.
Applications：1、Tubing 2、Injection- or blow-molded articles 3、Chemical linings

Brand
Teflon® is a registered trademark of DuPont for its brand of fluoropolymer resins, which can only be licensed by DuPont for use in approved applications. Customers who wish to use the Teflon® trademark in connection with DuPont PFA products under license from DuPont should contact (86)13662986968. Without a license, customers may not identify their product as containing Teflon®, but may refer to the resin as PFA 345.

Description
Teflon® PFA 345 is a medium-flow-rate resin avail-able in clear 2.5-mm (0.1-in.) pellets. Compared with Teflon® PFA 340, it offers increased flex life and greater resistance to environmental stress cracking.

All grades of Teflon® PFA combine the pro-cessing ease of conventional thermoplastics with properties similar to those of Teflon® PTFE fluoro-carbon resin. They have high melt strength, stability at high processing temperatures, and resistance to creep at high service temperatures.

Teflon® PFA retains its properties after service at 260℃ (500℉) and has useful properties at tem-peratures as low as –196℃ (–320℉). It is inert to nearly all industrial chemicals and solvents, and its dielectric properties are excellent. Products made with Teflon® PFA have moderate stiffness and high elongation.

In a flame situation, products of Teflon® PFA resist ignition and do not themselves promote flame spread. When ignited by flame from other sources, their contribution of heat is very small and added at a slow rate with very little smoke.

Typical End Products
Applications for Teflon® PFA 345 include tubing; wire and cable insulation; injection-molded parts; and chemically resistant linings for bellows, valves, fittings, pipes, pumps, and other fluid- handling components.

 

Table 1 Typical Property Data for Teflon® PFA Fluoropolymer Resin Grade 345
Property		ASTM Test Method	Unit	Value
Thermal	Melt Flow Rate	D3307	g/10 min	4.1–8.9
	Melting Point	D3307	℃(℉)	305(581)
	Continuous Service Temperature	-	℃(℉)	260(500)
	Flame Rating*	D635	s	5
		-	mm	5
		UL94		94V-0
	Coefficient of Linear Thermal
	Expansion,38–71℃(100–160℉)	D696	10–5 K–1	12.1–20.0
	Thermal Capacity,20℃(68℉)	C177	J/(kg•K)	1080
	Thermal Conductivity	C177	W/(m•K)	0.22
Mechanical	Specific Gravity	D792	-	2.15
	Tensile Strength	D638	MPa(psi)	29(4,206)
	Elongation	D638	%	300
	Flexural Modulus	D700	MPa(psi)	690(100,076)
	Hardness,Shore	D2240	-	D60
	Impact Strength,Notched Izod,23℃(73℉)	D256	-	No break
	MIT Folding Endurance	D2176	Cycle	100,000
Electrical	Dielectric Constant,Short Term(60 Hz to 1 GHz)	D150	-	2.03
	Dielectric Strength 0.025 mm film	D149	kV/mm	80(2,000)
	Volume Resistivity	D257	ohm•m	1018
	Dissipation Factor(tan delta)(60 to 109 Hz)	D150	-	0.0002–0.001
Environmental and Chemical Effects	Weather and Chemical Resistance		-	Excellent
	Water Absorption	D570	-	<0.01
* These results are based on laboratory tests under controlled conditions and do not reflect performance under actual fire conditions.

 

Safety Precautions
WARNING!
VAPORS CAN BE LIBERATED THAT MAY BE HAZARDOUS IF INHALED.
Before using Teflon® PFA 345, read the Material Safety Data Sheet and the detailed information in the “Guide to the Safe Handling of Fluoropolymer Resins,” latest edition, published by the Fluoro-polymers Division of The Society of the Plastics Industry—available from DuPont.

Open and use containers only in well-ventilated areas using local exhaust ventilation (LEV). Vapors and fumes liberated during hot processing, or from smoking tobacco or cigarettes contaminated with Teflon® PFA 345, may cause flu-like symptoms (chills, fever, sore throat) that may not occur until several hours after exposure and typically pass within about 24 hours. Vapors and fumes liberated during hot processing should be exhausted com-pletely from the work area; contamination of tobacco with polymers should be avoided.

Mixtures with some finely divided metals, such as magnesium or aluminum, can be flammable or explosive under some conditions.

Processing
Teflon® PFA 345 can be processed by conventional melt extrusion and by injection, compression, trans-fer, and blow-molding processes. High melt strength and heat stability permit the use of rela-tively large die openings and high-temperature draw-down techniques, which help increase extru-sion rates. For injection molding, reciprocating screw machines are preferred. Equipment should be corrosion resistant and capable of operation from 316℃ to 425℃ (600℃to 800℉).

Packaging
Teflon® PFA 345 fluoropolymer resins are pack-aged in 55-lb (24.9-kg) sealed bags.

PFA:http://www.pa66-suliao.com/product/gcsuliao/PFA