亚洲国产精品第一区二区|人人人人澡|操大姨姐|免费视频久久看|欧美国产激情二区三区

 內容編輯

Teflon® PTFE 8B
聚四氟乙烯
DuPont Fluoropolymers

產品說明

Teflon® PTFE 8B is a free-flowing white powder composed of relatively large particles. It has high bulk density and excellent powder flow. Compared with Teflon® PTFE 8 and Teflon® PTFE 8A, its most unique feature is particles designed to provide the highest quality of surface smoothness on finished parts, while maintaining outstanding flow and moldability.

The high bulk density and low compression ratio Teflon® PTFE 8B permit the use of shallow molds for small parts and complex shapes. Good powder flow is necessary for use in equipment that feeds resin automatically, and for filling deep and narrow molds that are pressed isostatically. Surface smoothness of molded parts is enhanced without sacrificing powder flow necessary for both automatic preforming and isostatic molding.

Teflon® PTFE 8B is used for high-speed automatic preforming of small parts that require optimum powder flow, a high level of physical properties, and very smooth surfaces. It is often preferred for isostatic molding.

Properly processed products made from neat Teflon® PTFE 8B 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 8B 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 • 已商用：當前有效   
供貨地區 • 北美洲 • 歐洲  
 • 拉丁美洲 • 亞太地區  
    
 • 低摩擦系數 • 良好的表面光潔度 • 耐化學性良好 
性能特點 • 剛性，良好 • 良好的成型性能 • 食品接觸的合規性 
 • 抗溶解性 • 良好的流動性 • 延展性，高 
用途 • 襯里 • 密封  
 • 閥門/閥門部件 • 實驗室器具  
    
機構評級 • FDA 21 CFR 177.1550   
外觀 • 白色   
形式 • 粉狀   
加工方法 • 燒結 • 壓縮模塑  

物理性能 額定值單位制 測試方法
比重 2.15g/cm³ ASTM D792
表觀密度 0.71g/cm³ ASTM D1895
收縮率 - 流動 2.8% ASTM D955
機械性能 額定值單位制 測試方法
抗張強度 27.6MPa ASTM D638
伸長率 (斷裂) 300% ASTM D638
熱性能 額定值單位制 
熔融溫度 327 到 342°C 
補充信息  
Powder Flow, ASTM D1855 Modified: 300 g/10 min  
Average Particle Size, ASTM D4894: 450 µm  

備注
1 一般屬性：這些不能被視為規格。

1 / 1