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Teflon® PTFE 7A
聚四氟乙烯
DuPont Fluoropolymers

产品说明

Teflon® PTFE 7A is a white powder with very small particle size. Its most unique feature is high bulk density.

The small particle size of Teflon® PTFE 7A helps to minimize voids even at relatively low molding pressure. High bulk density increases the size of moldings possible from a given mold or press opening.

Teflon® PTFE 7A is preferred for large moldings, such as billets, requiring optimum mechanical and electrical properties. It is also used in a mixture with fillers when they are added to modify the mechanical properties of moldings.

Properly processed products made from neat Teflon® PTFE 7A 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. Molded products have moderate stiffness and high ultimate elongation.

In a flame situation, products of Teflon® PTFE 7A 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.

总体

材料状态 • 已商用：当前有效   
供货地区 • 北美洲 • 欧洲  
 • 南美洲 • 亚太地区  
    
 • 低摩擦系数 • 耐化学性良好 • 延展性，高 
性能特点 • 刚性，良好 • 食品接触的合规性  
 • 抗溶解性 • 烟释放，低  
 • 薄膜 • 垫圈 • 密封装置 
用途 • 衬里 • 隔膜 • 片材 
 • 电器导线绝缘材料 • 密封 • 轴承 
机构评级 • FDA 21 CFR 177.1550   
外观 • 白色   
形式 • 粉状   
加工方法 • 烧结 • 压缩模塑  

物理性能 额定值单位制 测试方法
比重 2.15g/cm³ ASTM D792
表观密度 0.46g/cm³ ASTM D1895
收缩率 - 流动 3.4% ASTM D955
机械性能 额定值单位制 测试方法
抗张强度 34.5MPa ASTM D638
伸长率 (断裂) 380% ASTM D638
热性能 额定值单位制 
熔融温度 327 到 342°C 
补充信息  
Average Particle Size, ASTM D4894: 34 µm  

备注
1 一般属性：这些不能被视为规格。

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