DuPont™ Teflon® PTFE 60
fluoropolymer resin

Fine Powder Lubricated Extrusion 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 applica-tions. Customers who wish to use the Teflon® trademark in connection with DuPont Fine Powder 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 PTFE 60.

Description
DuPont™ Teflon® PTFE 60 is a white powder composed of agglomerate particles. As with other grades of Teflon® polytetrafluoroethylene (PTFE) fine powders, it can be lubricated and extruded by pressure alone into long lengths of a coherent, fibrous matrix with useful structural integrity. The low-density extrudate can be used for its unique conformability or processed further, with heat, to produce void-free solid products.

Compared with other grades of PTFE fine powder, Teflon® PTFE 60 is a special-purpose resin designed to facilitate the production of high-quality, low-density tape and beading made by low-reduction ratio extrusions. These products are widely used as conformable, high-performance sealing materials.

Properly processed products made from virgin Teflon® PTFE 60 provide the superior properties typical of the fluoropolymer resins: retention of properties after service at 260°C (500°F), useful properties at –240°C (–400°F), chemical inertness to nearly all industrial chemicals and solvents, and low friction and antistick surfaces. Dielectric properties are outstanding and stable with frequency and temperature.

In a flame situation, products of Teflon® PTFE 60 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.

Teflon® PTFE 60 is ASTM D4895, Type I, Grade 2, Class A (ASTM D1457, Type III, Grade 2, Class C).

Typical End Products
Applications for Teflon® PTFE 60 include unsintered tape for sealing pipe threads and for wire wrapping; tape or beading for flange gaskets; shaft packings; and other sealing uses in contact with steam, chemicals, or reactive gas.

FDA Compliance
Properly processed products (sintered at high temperatures common to the industry) made from Teflon® PTFE 60 resin can qualify for use in contact with food in compliance with FDA Regulation 21 CFR 177.1550.

Processing
Teflon® PTFE 60 is prepared for extrusion by mixing with a liquid extrusion aid. The damp powder is compressed into a cylindrical preform slug and placed in the cylinder of a ram-type extruder. Under high pressure, the billet is forced through a finishing die with a large cross section selected for making beading or other special profiles.

After extrusion, the product is a low-density, fibrous structure. If beading is being produced as a finished product, the liquid extrusion aid is removed by heat within the range of 100–300°C (212–572°F), and the beading is cut to length. For making unsintered tape, a special profile is usually extruded and calendered into the desired thickness before removal of the lubricant. Teflon® PTFE 60 is designed to provide an optimum balance of directional strength and elongation in finished tape or beading.

Reduction ratio (RR) is the ratio of cross section of preform to that of extrudate; it is an extruder option also affecting the selection of resin grade.

Safety Precautions
WARNING!
VAPORS CAN BE LIBERATED THAT MAY BE HAZARDOUS IF INHALED
Before using Teflon® PTFE 60, 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 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® PTFE 60, may cause flu-like symptoms (chills, fever, sore throat) that may not occur until several hours after exposure and pass within 36 to 48 hr. Vapors and fumes liberated during hot processing should be exhausted completely from the work area; contamination of tobacco with polymers should be avoided. Mixtures with some finely divided metals, such as magnesium or alumi-num, can be flammable or explosive under some conditions.

Flammable liquid extrusion aids can cause fires in ovens and in mixing areas. Before using, obtain manufacturer’s recommendations.

Storage and Handling
Teflon® PTFE 60 must be handled carefully to avoid shearing the powder prior to extrusion. Fibrillation by shearing is not reversible, and damaged particles can appear as defects in the finished product. As temperature is reduced, the powder becomes progressively less sensitive to mechanical damage or compaction in its containers.

Fine powder can withstand significantly more abuse when it is in the below room temperature transition state. For this reason, DuPont stores and delivers Teflon® PTFE 60 at or below 7°C (45°F). Teflon® PTFE 60 will remain in this cold transition state until it is warmed above 19°C (66°F). If this resin is allowed to go above 19°C (66°F) at any time, it must be cooled below about 10°C (50°F) to bring it back to the cold state.

All processing steps prior to preforming are facilitated at reduced temperature, but ambient dew point must be controlled to prevent conden-sation on the resin.

Storage and handling facilities should be clean. Very small foreign particles are highly visible in the white resin. Keep resin drums closed and clean. Good housekeeping and careful handling are essential.

Table 1
Typical Property Data for DuPont™ Teflon® PTFE 60 Fluoropolymer Resin

Property		ASTM Test Method	Unit	Nominal Value
General	Bulk Density	D4895	g/L	485
	Average Particle Size	D4895	µm	485
	Standard Specific Gravity	D4895	-	2.19
	Rheometer Pressure*	D4895	MPa(psi)	8(1,170)
	Melting, Peak Temperature
	Initial	D4895	(℉)	342 (648)
	Second	D4895	(℉)	327 (621)
Typical properties are not suitable for specification purposes. *Reduction Ratio 100:1

Freight Classification
Teflon® PTFE 60, when shipped by rail or express, is classified “Plastics, Synthetic, O.T.L., NOIBN.” Resin shipped by truck is classified “Plastics, Materials Granules.”

Packaging
Teflon® PTFE 60 resin is packaged in 27.2-kg (60-lb) plastic containers.

 

聚四氟乙烯官网：http://www.pa66-suliao.com/product/gcsuliao/PTFE