内容编辑

Teflon® PTFE 7B
聚四氟乙烯
DuPont Fluoropolymers

产品说明

DuPont™ Teflon® PTFE 7B is a white granulated powder with an ultra fine particle size and high bulk density. The ultra-fine particle size minimizes voids even at relatively low molding pressure. Teflon® PTFE 7B is an excellent choice for moldings requiring optimum mechanical and electrical properties.

The ultra-fine particle size of Teflon® PTFE 7B promotes good capture and uniform distribution of inorganic fillers when they are added to modify the mechanical properties of moldings. Teflon® PTFE 7B exhibits a mold shrinkage that is intermediate of the mold shrinkage of 7A and 7C grades.

Properly processed products made from neat Teflon® PTFE 7B 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 7B 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  
 • 拉丁美洲 • 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  
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 0.33g/cm³ ASTM D1895
收缩率 - 流动 4.4% ASTM D955
机械性能 额定值单位制 测试方法
抗张强度 36.5MPa ASTM D638
伸长率 (断裂) 400% 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: 24 µm  

备注
1 一般属性：这些不能被视为规格。

1 / 1