产品名称: 美国杜邦 DUPONT TEFLON PTFE 7A X 聚四氟乙烯 低粒径 适用大型毛胚件 科慕
产品详情
Product Information
Description
Teflon™ PTFE 7A X is a white powder with a small particle size. Its small particle size helps to minimize voids, even at relatively low molding pressures. High bulk density increases the size of moldings possible from a given mold or press opening. Teflon™ PTFE 7A X is preferred for large moldings requiring optimum mechanical and electrical properties.
It offers an excellent combination of properties that are characteristic of Teflon™ fluoroplastic resins:
• Chemical inertness
• Exceptional dielectric properties
• Heat resistance
• Toughness and flexibility
• Low coefficient of friction
• Non-stick characteristics
• Negligible water absorption
• Excellent weather resistance
Properly processed products made from neat Teflon™ PTFE 7A X provide the superior properties typical of fluoroplastic resins. It’s easy to process, handle, and machine.
Typical Applications
Many end products are fabricated from billets, which include skived film and sheet. It can be used for applications, such as:
• Gaskets • Packings
• Mechanical seals • Bridge or pipeline bearing pads
• Shaft bearings • Electrical insulators
• Piston rings • Expansion bellows
• Diaphragms • Chemical linings
The use of fillers provides a wide choice of modified mechanical properties.
Processing
Teflon™ PTFE 7A X usually is processed in two steps: preforming and sintering. The powder is first compacted into a preformed shape approximating that of the desired molding.
A precise heating (sintering) and cooling cycle is then used to consolidate the molding at temperatures above the crystalline melting point of the neat powder. The properties of a finished molding are dependent on perform pressure, sintering time and temperature, and cooling rate. Teflon™ PTFE 7A X is
used to make relatively large objects in molds that can be filled manually. Small particle resins do not flow properly in automatic feeding systems. Refer to the typical property data in Table 1.
Food Contact Compliance
Properly processed products (sintered at high temperatures common to the industry) made from Teflon™ PTFE 7A X resin can qualify for use in contact with food in compliance with FDA 21 CFR 177.1550 and European Regulation (EU) No. 10/2011. For details and information, please contact your Chemours sales representative.
Safety Precautions
Before processing any fluoroplastics, read the Material Safety Data Sheet, available upon request from our Customer Service Group at (844) 773-CHEM/2436 in the
U.S. or (302) 773-1000 outside of the U.S. Also read the detailed information in the latest edition of the “Guide to the Safe Handling of Fluoropolymer Resins,” published by the Fluoropolymers Division of The Society of the Plastics Industry (www.fluoropolymers.org) or by PlasticsEurope
