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pa6680g25hsl dupont 80g25hsl super-tough grade, heat-stable impactresistant and glass fiber 25% pa66 is also known as polyester 66;polyadipylenediamine; english name: polyamide 66, short nylon 66. acrystalline polymer of transparent or milky white color used in themanufacture of parts for machinery, vehicles, organic chemistry,and electrical e, such as transmission gears, rollerbearings, rollers, work rollers, centrifugal impeller in the pumpshell, fan impeller, high-pressure seal enclosure, high-pressuregate valve, gasket, shaft sleeve, a variety of door handles, fixedsupport, cable insulation layer. can also be made into plastic filmas packaging products. in addition, it can also be used to makemedical machinery, sports articles, daily necessities, etc. ,characteristics: pa66 acrylic resin 66 or polyester 66 chemical andphysical characteristics of pa66 in acrylic resin material has ahigh solution point. it is a semi-crystalline-crystalline material.pa66 also maintains high strength and stiffness at highertemperatures. in the design of products, must take into account theharm of water absorption to the stability of geometric graphics. inorder to ensure the mechanical properties of pa66, a variety ofmodified materials are often added. laminated glass is a commonadditive, sometimes in order to ensure impact resistance also addsbr, such as epdm and sbr. pa66 has a low viscosity and therefore avery good mobility (but not as good as pa6) . this feature can beused to manufacture very thin components. its viscosity isparticularly sensitive to temperature changes. the shrinkage ofpa66 was in the middle of 1% ~ 2% . the shrinkage of pa66 could bereduced to 0.2% ~ 1% by adding glass fiber additive. the shrinkageratio is different in the step azimuth and the vertical directionof the step azimuth. pa66 is resistant to most organic solvents,but less resistant to acids and some other sodium cyanateagents.