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Teflon® PTFE NXT 75
聚四氟乙烯
DuPont Fluoropolymers

产品说明

Teflon® NXT 75 is a chemically modified polytetrafluoroethylene polymer.

When properly processed, Teflon® NXT 75 exhibits the superior properties typical of the fluoropolymer resins: nonaging characteristics, chemical inertness, heat resistance, toughness and flexibility, low coefficient of friction, nonstick characteristics, negligible moisture absorption, and weather resistance. In addition, this resin offers weldability, improved resistance to deformation under load, increased resistance to permeation of chemicals, and a higher dielectric breakdown voltage. This resin provides a high degree of weldability for applications where

the use of elevated pressure and temperature are limited.

Teflon® NXT 75 is a fine-cut resin designed for general compression molding of blocks and sheets and for use as a base resin for compounds. It can be used for such applications as: seal rings, valve seats, bearing pads, linings, encapsulations, and as a base resin for filled compounds. This resin is particularly useful in applications where welding of parts to other fluoropolymers such as PFA or standard PTFE is required, e.g., fluid-handling systems.

Properly processed products (sintered at high temperatures common to the industry) made from
Teflon® NXT 75 resin can qualify for use in contact with food in compliance with FDA Regulation 21 CFR 177.1550.

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 • 耐气候影响性能良好 • 无粘性 
性能特点 • 可焊接 • 耐热性，高  
 • 良好的柔韧性 • 韧性良好 • 吸潮性差 
    
 • 耐化学性良好 • 食品接触的合规性  
用途 • 衬里 • 混合 • 轴承 
 • 阀门/阀门部件 • 密封  
    
机构评级 • FDA 21 CFR 177.1550   
形式 • 颗粒料   
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 2.16g/cm³ ASTM D4894
表观密度 0.44g/cm³ ASTM D4894
收缩率 - 流动 2 4.7% ASTM D955
颗粒大小 33.0µm ASTM D4894
机械性能 额定值单位制 测试方法
抗张强度 31.0MPa ASTM D4894
伸长率 (断裂) 500% ASTM D638
负载变形 3 (23°C, 1.4 MPa) 3.20% ASTM D621
电气性能 额定值单位制 测试方法
介电强度 (0.0762 mm) 210kV/mm ASTM D149
补充信息 额定值单位制 测试方法
Void Content 4 0.0 到 0.50% 
Weld Strength 5 66 到 87% ASTM D4894

备注
1 一般属性：这些不能被视为规格。

2 at preform pressure of 35 MPa [5,000 psi]

3 24 hrs, Method A

4 FTIR-Infra Red Spectroscopy

5 Specimens Welded After Sintering

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