PFA 美国杜邦 440HP 注塑级 热稳定 耐高温 耐腐蚀

PFA 美国杜邦 440HP 注塑级 热稳定 耐高温 耐腐蚀

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加工成制品。适于制作件，减磨件、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。

Chemours Teflon? PFA Grade 440 HP Extrusion and MoldingResin

Polymer,Thermoplastic,Fluoropolymer,PFA

Chemours

产品说明:

DuPont? Teflon? PFA 440 HP fluoropolymer is a special purposeresin available in clear, 2.5-mm (0.1-in.) pellets. This resin is achemically modified form of Teflon? PFA 340 that combines many ofthe benefits of the parent resin with several new ones. Theadditional benefits may include enhanced purity, improved thermalstability while processing, and chemical inertness, for example, toozonated fluids.

The enhanced purity of Teflon? PFA 440 HP makes it suitable forapplications that require improved color, lower extractablefluorides, and freedom from other foreign materials. This productcontains no additives and is designed for hostile chemicalenvironments where purity in the parts-per-billion range is needed.Examples are in semiconductor manufacture, fluid handling systemsfor industry or life sciences, and instrumentation for precisemeasurements of fluid systems.

The improved thermal stability of Teflon? PFA 440 HP results inreduced amounts of bubbles in final parts and decreased corrosionof processing equipment. Teflon? PFA 440 HP combines the processingease of conventional thermoplastics with properties similar tothose of polytetrafluoroethylene. Properly processed products madefrom neat Teflon? PFA 440 HP resin provide the superior propertiestypical of fluoropolymer resins: retention of properties afterservice at 260°C (500°F), useful properties at –196°C (–320°F), andchemical inertness to nearly all industrial chemicals and solvents.Dielectric properties are excellent. Molded products have moderatestiffness and high ultimate elongation.

Three categories (A, B, and D) of Teflon? PFA 440 HP resincovering a broad range of melt flow rates (MFR) are available. Thelow MFR resin provides a higher degree of stress crack resistancewhile the high MFR resin is easier to process. In a flamesituation, products of Teflon? PFA 440 HP resist ignition and donot themselves promote flame spread. When ignited by flame fromother sources, their contribution of heat is very small and addedat a slow rate with very little smoke.

Statements, or data, regarding behavior in a flame situation arenot intended to reflect hazards presented by this or any othermaterial when under actual fire conditions.

Applications

Applications for Teflon? PFA 440 HP include tubing; unsupportedpipe or pipe linings for production of ultrapure chemicals;semiconductor component and fluid handling systems forhighperformance chemical filters.

Chemours was formed from former DuPont performance chemicalsbusinesses, including DuPont Fluoroproducts, in 2015.

Chemours Teflon? PFA Grade 440 HP Extrusion and Molding Resin物性表