For inventory control purposes, product name may be followed by an X. Products labeled PFA 451HP and PFA 451HP X are equivalent, and all  information in this document is applicable to both. 

Typical Applications  

Applications for Teflon™  PFA 451HP include tubing, unsupported pipe  linings for the production of ultra-pure chemicals, semiconductor fluid  handling components, and high-performance chemical delivery systems  where purity in the parts-per-billion range is needed. Teflon™  PFA 451HP is  preferred in applications where surface smoothness and the highest levels  of chemical permeation resistance are required. 

Description  

Teflon™  PFA 451HP is a special purpose fluoroplastic resin available in  pellet form. This resin is a chemically modified form of Teflon™  PFA 350  that combines many of the advantages of the parent resin with several  additional benefits. Teflon™  PFA 451HP exhibits improved surface  smoothness achieved through minimization of spherulite size, enhanced  chemical permeation resistance achieved by increasing its crystallinity  from Teflon™  PFA 450HP, enhanced purity, and improved thermal stability  while processing. 

Teflon™  PFA 451HP is a relatively low melt flow rate (typical MFR of 2),  premium resin with the lowest level of extractables designed to meet  ultra-high purity requirements. An enhanced resistance to environmental  stress-cracking and chemical permeation make Teflon™  PFA 451HP a  preferred resin when extended service is required in hostile environments  involving chemical, thermal, and mechanical stress. Additionally, the  enhanced purity of Teflon™  PFA 451HP 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 partsper-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. Compared to other  thermoplastics, the high melt strength and thermal stability of Teflon™ PFA 451HP can be used to improve processing rates, combining the  processing ease of conventional thermoplastics with many properties  similar to those of polytetrafluoroethylene.  

Properly processed products made from neat Teflon™  PFA 451HP  resin provide the superior properties characteristic of fluoroplastic  resins: chemical inertness, exceptional dielectric properties, heat  resistance, toughness and flexibility, low coefficient of friction, nonstick characteristics, negligible moisture absorption, low flammability,  performance at temperature extremes, and excellent weather resistance. 

In a flame situation, products of Teflon™  PFA 451HP 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.