美国科慕PFA 951HP 食品级 注塑级 高韧性 管材 液体处理 内衬管道防腐

Teflon? PFA 951HP Plus

全氟烷氧基

DuPont Fluoropolymers

产品说明：

For inventory control purposes product name may be followed by an X.

Products labeled PFA 951HP Plus and PFA 951HP Plus X are equivalent and all information in this document is applicable to both.

Typical Application
With permeation resistance that is up to 60% greater than standard PFA, DuPont? Teflon ? PFA 951HP Plus is designed for applications where reduced chemical permeation, resistance to stress-cracking, and surface smoothness are critical to reducing contamination and protecting process yields. Applications for Teflon ? PFA 951HP Plus include fluid handling components for high-performance chemical delivery systems, as well as tubing, unsupported pipe linings for the production of ultra-pure chemicals, and semiconductor components where purity in the parts-per-billion range is needed.

Description
DuPont? Teflon ? PFA 951HP Plus is a premium fluoroplastic resin available in pellet form. Teflon ? PFA 951HP Plus possesses the same exceptional chemical resistance, high purity, and protection against ionic contamination as Teflon ? PFA HP grades with the added benefits of improved flex life and chemical stress-crack resistance. Teflon ? PFA 951HP Plus has unmatched HCl permeation resistance, and is also 45% less permeable to nitrogen than other PFAs (permeation by nitrogen is a general indication of the rate of permeation by other molecules). Additionally, the improved flex life and chemical resistance will reduce the cost of ownership of high purity fluid handling systems by reducing downtime caused by mechanical or chemical stresses. Parts molded with Teflon ? PFA 951HP Plus have an xceptionally smooth finish, which can further help prevent buildup of microbial contamination in water handling systems. Table 1 shows the typical property data for Teflon ? PFA 951HP Plus.

Teflon ? PFA 951HP Plus is a relatively low melt flow rate (typical MFR of 2), special purpose resin with the lowest level of extractables designed to meet ultra-high purity requirements. The enhanced resistance to environmental stress-cracking makes Teflon ? PFA 951HP Plus a preferred resin when extended service is required in hostile environments involving chemical, thermal, and mechanical stress. Additionally, the enhanced purity of Teflon ? PFA 951HP Plus makes it suitable for applications that require improved color, lower extractable fluorides, and freedom from other foreign materials. This product contains no additives and is designed for hostile chemical environments where purity in the parts-per-billion range is needed. Examples are in semiconductor manufacture, fluid handling systems for industry or life sciences, and instrumentation for precise measurements of fluid systems. Teflon ? PFA 951HP Plus combines the processing ease of conventional thermoplastics with the properties similar to those of polytetrafluoroethylene.

With Teflon ? PFA 951HP Plus, components can last longer under dynamic loads and resist damage caused by ozonated fluids nd fluorosurfactants. Combined with exceptional chemical, permeation, and stress-crack resistance, this durability leads to a reduced cost of ownership. The high purity and fully fluorinated molecule end groups of Teflon ? PFA 951HP Plus can reduce contamination to protect process yields.

Properly processed products made from neat Teflon ? PFA 951HP Plus resin provide the superior properties characteristic of fluoroplastic resins: chemical inertness, exceptional dielectric properties, heat resistance, toughness and flexibility, low coefficient of friction, non-stick characteristics, negligible moisture absorption, low flammability, performance at temperature extremes, and excellent weather resistance.

In a flame situation, products of Teflon ? PFA 951HP Plus resist ignition and do not promote flame spread. When ignited by flame from other sources, their contribution of heat is very small and added at a slow rate with very little smoke.

Teflon ? PFA 951HP Plus meets the requirements of ASTM D 2116-07(2012), Type V

PFA塑料为少量全氟丙基全氟乙烯基醚与聚四氟乙烯的共聚物。熔融粘结性增强，溶体粘度下降，而性能与聚四氟乙烯相比无变化。此种树脂可以直接采用普通热塑性成型方法加工成制品。适于制作耐腐蚀件，减磨耐磨件、密封件、绝缘件和医疗器械零件，高温电线、电缆绝缘层，防腐设备、密封材料、泵阀衬套，和化学容器。

PFA物料性能

1、 为少量全氟丙基全氟乙烯基醚与聚四氟乙烯的共聚物。熔融粘结性增强，溶体粘度下降，而性能与聚四氟乙烯相比无变化。此种树脂可以直接采用普通热塑性成型方法加工成制品。

2、长期使用温度-196--260摄氏度，有卓越的耐化学腐蚀性，对所有化学品都耐腐蚀，摩擦系数在塑料中最低，还有很好的电性能，其电绝缘性不受温度影响，有“塑料王”之称。

3、其耐化学药品性与聚四氟乙烯相似，比偏氟乙烯好。

4、其抗蠕变性和压缩强度均比聚四氟乙烯好，拉伸强度高，伸长率可达100-300%。介电性好，耐辐射性能优异。阻燃性达V0级。

5、适于制作耐腐蚀件，减磨耐磨件、密封件、绝缘件和医疗器械零件。

6、高温电线、电缆绝缘层，防腐设备、密封材料、泵阀衬套，和化学容器。

成型性能

1.结晶料,吸湿小。可采用通常得热塑性塑料得加工方法加工成制品。

2.流动性差，极易分解，分解时产生腐蚀气体。宜严格控制成型温度不要超过475摄氏度，模具应加热至150-200摄氏度，浇注系统对料流阻力应小。

3.半透明粒料，注塑、挤出成型。成型温度350-400摄氏度，475摄氏度以上容易引起变色或发生气泡。并注意脱模会较困难。

4、因熔融的材料对金属有腐蚀作用，长期生产，模具需要电镀铬处理。

全氟烷氧基树脂

PFA树脂相对来说是比较新的可熔融加工的氟塑料。

PFA的熔点大约为580F，密度为2.13— 2.16g/cc（克/立方厘米）。PFA与 PTFE和FEP相似，但在302T以上时，机械性能略优于FEP，且可在高达500F下的温度下使用，它的耐化学品性与PTFE相当。PFA的产品形式有用于模塑和挤塑的粒状产品，用于旋转模塑和涂料的粉状产品；其半成品有膜、板、棒和管材。美国市场经销的PFA树脂有DUPOut公司的Teflon牌、Daikin公司的Neoflon牌、Ansimont公司的Hthen牌、HOechst Celanese公司的 Hostafl牌。PFA的用途与FEP类似。

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