供应氟塑料PFA-340J

TEFLON® PFA 340-J

Fluoropolymer resin

Extrusion and Molding Resin

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 your local DuPont office.

Without a license, customers may not identify their

product as containing Teflon®, but may refer to the

resin as PFA 340-J.

Description

Teflon® PFA 340-J is a general-purpose resin

available in clear, 3.0mm pellets. Compared with

other grades of Teflon® PFA, its most unique features

are a relatively high flow rate and properties that

make it suitable for a variety of processes and

demanding end uses.

Teflon® PFA 340-J and the other Teflon® PFA

(perfluoroalkoxy) fluoropolymer resins combine the

processing ease of conventional thermoplastics with

properties similar to those of polytetrafluoroethylene

(PTFE). They have high melt strength, stability at

high processing temperatures, and resistance to

creep at high service temperature.

Teflon® PFA 340-J is used when traditional extrusion

and molding processes are required for producing

products with the superior properties of a

fluoropolymer resin. For a given process, its high

melt strength and thermal stability can be used to

improve rates. Compared with other fluoropolymers,

its creep resistance at its high service temperatures

provides a superior balance and level of end-use

properties.

Properly processed products made from neat Teflon®

PFA 340-J resin provide the superior properties

typical of the fluoropolymer resins: retention of

properties after service at 260°C, useful properties at

–196°C, and chemical inertness to nearly all industrial

chemicals and solvents. Dielectric constant and

dissipation factor are exceptionally low. Molded

products have moderate stiffness and high ultimate

elongation.

In a flame situation, products of Teflon® PFA 340-J

resist ignition and do not themselves promote flame

spread. When ignited by flame from other sources,

their contribution of heat is small and with very little

smoke.

Statements, or data, regarding behavior in a flame

situation are not intended to reflect hazards

presented by this or any other material when under

actual fire conditions.

Typical End Products

Applications for Teflon® PFA 340-J include extruded

tubing and other profiles for hose, electrical insulators,

and sleeving; industrial film; and injection molded

articles requiring superior electrical, chemical, and

thermal properties.

Processing

Teflon® PFA 340-J can be processed by conventional

melt extrusion and by injection, compression, and

transfer processes. High melt strength and heat

stability permit the use of relatively large die openings

and high-temperature draw-down techniques that

increase production rates. Reciprocating screw

injection molding machines are preferred.

Corrosion-resistant metals should be used in contact

with molten resin. Extruder barrels should be long,

relative to diameter, to provide residence time for

heating the resin to approximately 390°C. ?