{"product_id":"sp-21-rod-20-307mm","title":"DuPont Vespel® SP-21 Polyimide Bar Stock Ø20×307mm | PI High-Temperature Plastic Rod","description":"\u003ch2\u003eDuPont Vespel® SP-21 Polyimide Rod Ø307mm — SP-21 (15% Graphite Filled)\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eVespel® SP-21 polyimide (PI) bar stock\u003c\/strong\u003e from DuPont is recognized as the gold standard for extreme-temperature engineering applications. With no melting point and a long-term service range of −269°C to +300°C, Vespel components outperform metals and conventional plastics in the most demanding environments.\u003c\/p\u003e\n\u003ch3\u003eKey Properties\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Resistance:\u003c\/strong\u003e Continuous use from −269°C to +300°C; short-term to +400°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadiation Resistance:\u003c\/strong\u003e Withstands ionizing radiation — ideal for nuclear and space applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Resistance:\u003c\/strong\u003e Stable in most organic solvents, fuels, and lubricants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensional Stability:\u003c\/strong\u003e Extremely low coefficient of thermal expansion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Insulation:\u003c\/strong\u003e Excellent dielectric properties across wide temperature and frequency ranges\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachinability:\u003c\/strong\u003e Superior CNC machinability — tight tolerances achievable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cp\u003eAerospace bushings and thrust washers, semiconductor process components, vacuum chamber seals, rocket engine components, precision scientific instruments\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDuPont Vespel® SP-21 — Polyimide (PI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGrade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSP-21 (15% Graphite Filled)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYellow-Brown (SP-1) \/ Black (SP-21)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContinuous Service Temp.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e−269°C to +300°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eCustom dimensions and CNC machined parts available.\u003c\/strong\u003e Contact us for a quote.\u003c\/p\u003e","brand":"shunhan","offers":[{"title":"Default Title","offer_id":47668464255193,"sku":null,"price":750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0788\/2483\/3241\/files\/1768319392945.jpg?v=1769532533","url":"https:\/\/www.shunhanplastics.com\/products\/sp-21-rod-20-307mm","provider":"ShunHan Plastics","version":"1.0","type":"link"}