Teflon® PFA451HP

全氟烷氧基

DuPont Fluoropolymers

产品说明：

For inventory control purposes product name may be followed byan X.

Products labeled PFA 451HP and PFA 451HP X are equivalent and allinformation in this document is applicable to both.

Typical Application
Teflon ® PFA 451HP is preferred in applications where purity in theparts-per-billion range, surface smoothness, and the highest levelsof chemical permeation resistance are required; including tubing,unsupported pipe linings for the production of ultra-purechemicals, semiconductor components, and fluid handling componentsfor high-performance chemical delivery systems where stress-crackresistance is critical.

Description
DuPont™ Teflon ® PFA 451HP is a special purpose fluoroplastic resinavailable in pellet form. This resin is a chemically modified formof Teflon ® PFA 350 that combines many of the advantages of theparent resin with several additional benefits. Teflon ® PFA 451HPexhibits improved surface smoothness achieved through minimizationof spherulite size, enhanced chemical permeation resistanceachieved by increasing its crystallinity from Teflon ® PFA 450HP,enhanced purity, and improved thermal stability whileprocessing.

Teflon ® PFA 451HP is a relatively low melt flow rate (typical MFRof 2), premium resin with the lowest level of extractables designedto meet ultra-high purity requirements. An enhanced resistance toenvironmental stress-cracking and chemical permeation make Teflon ®PFA 451HP a preferred resin when extended service is required inhostile environments involving chemical, thermal, and mechanicalstress. Additionally, the enhanced purity of Teflon ® PFA 451HPmakes it suitable for applications that require improved color,lower extractable fluorides, and freedom from other foreignmaterials. This product contains no additives and is designed forhostile chemical environments where purity in the parts-per-billionrange is needed. Examples are in semiconductor manufacture, fluidhandling systems for industry or life sciences, and instrumentationfor precise measurements of fluid systems. Compared to otherthermoplastics, the high melt strength and thermal stability ofTeflon ® PFA 451HP can be used to improve processing rates,combining the processing ease of conventional thermoplastics withmany properties similar to those of polytetrafluoroethylene.

Properly processed products made from neat Teflon ® PFA 451HP resinprovide the superior properties characteristic of fluoroplasticresins: chemical inertness, exceptional dielectric properties, heatresistance, toughness and flexibility, low coefficient of friction,non-stick characteristics, negligible moisture absorption, lowflammability, performance at temperature extremes, and excellentweather resistance.

In a flame situation, products of Teflon ® PFA 451HP resistignition and do not promote flame spread. When ignited by flamefrom other sources, their contribution of heat is very small andadded at a slow rate with very little smoke.

Teflon ® PFA 451HP meets the requirements of ASTM D3307, TypeII