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Teflon® PTFE 7A
聚四氟乙烯
DuPont Fluoropolymers

產(chǎn)品說明

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.

總體

材料狀態(tài) • 已商用：當(dāng)前有效   
供貨地區(qū) • 北美洲 • 歐洲  
 • 南美洲 • 亞太地區(qū)  
    
 • 低摩擦系數(shù) • 耐化學(xué)性良好 • 延展性，高 
性能特點(diǎn) • 剛性，良好 • 食品接觸的合規(guī)性  
 • 抗溶解性 • 煙釋放，低  
 • 薄膜 • 墊圈 • 密封裝置 
用途 • 襯里 • 隔膜 • 片材 
 • 電器導(dǎo)線絕緣材料 • 密封 • 軸承 
機(jī)構(gòu)評(píng)級(jí) • FDA 21 CFR 177.1550   
外觀 • 白色   
形式 • 粉狀   
加工方法 • 燒結(jié) • 壓縮模塑  

物理性能 額定值單位制 測(cè)試方法
比重 2.15g/cm³ ASTM D792
表觀密度 0.46g/cm³ ASTM D1895
收縮率 - 流動(dòng) 3.4% ASTM D955
機(jī)械性能 額定值單位制 測(cè)試方法
抗張強(qiáng)度 34.5MPa ASTM D638
伸長(zhǎng)率 (斷裂) 380% ASTM D638
熱性能 額定值單位制 
熔融溫度 327 到 342°C 
補(bǔ)充信息  
Average Particle Size, ASTM D4894: 34 µm  

備注
1 一般屬性：這些不能被視為規(guī)格。

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