He mea pono loa ka PTFE no ka mea he hui kū hoʻokahi o nā waiwai.PTFE mea kemika inert, weatherable, maikai uila insulation, kiʻekiʻe wela kū'ē, he haʻahaʻa coefficient o friction a me ka ole-pili waiwai.Hoʻohana pū ʻia nā paipu hoʻohaʻahaʻa e like me nā uhi ʻōwili a no ka pale ʻana i nā ʻāpana uila a i ʻole nā ʻāpana.Hiki i ka PTFE ke skived a extruded i loko o nā lipine a me nā kiʻiʻoniʻoni hiki ke hoʻohana ʻia no nā sila a me nā mea gasket.ʻO ka polymer he inoa kālepa maʻamau no ka polytetrafluoroethylene (PTFE) i hana ʻia.
ʻO keʻano maʻamau o nā papa a pau o ka Polymer PTFE (polytetrafluoroethylene) pauka maikaʻi, hiki ke lubricated a hoʻokuʻuʻia e nāʻano hana extrusion paste maʻamau. Hoʻohālikelikeʻia me nā papa'ē aʻe o ka pauka maikaʻi o ka PTFE, he resin ka polymer PTFE i hoʻonui i ka ikaika heheʻe a me ka emi haʻahaʻa.ʻO ia kekahi o nā resins kūlike a maʻalahi hoʻi.He kūpono loa ia no nā huahana me nā extrusions hoʻēmi haʻahaʻa a kiʻekiʻe.
ʻO nā huahana i hana pono ʻia mai ka PTFE polymer maʻemaʻe e hāʻawi i nā waiwai maikaʻi loa o nā resins fluoropolymer: ka mālama ʻana i nā waiwai ma hope o ka lawelawe ʻana ma 260°C (500°F), nā waiwai pono ma –240°C (–400°F), ʻaʻole inertness kemika i ʻaneʻane nā mea kemika a me nā mea hoʻoheheʻe ʻoihana, a me nā ʻili liʻiliʻi a me nā antistick.ʻOi aku ka maikaʻi a paʻa nā waiwai dielectric me ka pinepine a me ka mahana.Loaʻa nā huahana i ka ʻoʻoleʻa haʻahaʻa a me ka elongation kiʻekiʻe loa. Ma kahi kūlana lapalapa, nā huahana o ka polymer PTFE e kūʻē i ka ʻā ʻana a ʻaʻole lākou e hoʻolaha i ka laha ahi.Ke hoʻā ʻia e ka lapalapa mai nā kumu ʻē aʻe, liʻiliʻi kā lākou hāʻawi ʻana i ka wela a me ka uahi liʻiliʻi loa.
Hoʻomākaukau ʻia ka polymer PTFE no ka extrusion ma ka hui ʻana me kahi kōkua extrusion wai.Hoʻopili ʻia ka pauka maʻemaʻe i loko o kahi slug preform cylindrical a waiho ʻia i loko o ka cylinder o kahi extruder ʻano hipa.Ma lalo o ke kaomi kiʻekiʻe, koi ʻia ka haku mele ma o ka make hoʻopau ʻana e hana i ka beading, tubing, a i ʻole nā uhi.Hiki ke uhi ʻia nā mea like ʻole, e like me ka uea metala a i ʻole nā mea wela wela ma ka hānai ʻana iā lākou ma o ke axis o ka pahu extruder.Ma hope o ka extrusion, ʻo ka huahana he haʻahaʻa haʻahaʻa, akā paʻa, ʻano fibrous.ʻO ka polymer PTFE 640 ka hana maʻamau, me ka wela, i loko o kahi huahana resin paʻa, e like me ka tubing. Hoʻohana ʻia ka wela ma nā ʻanuʻu ʻelua, hiki ke hana ʻia ma ka laina me ka extrusion a ʻokoʻa paha.Pono e wehe mua ʻia ka lubricant, ma ke ʻano maʻamau ma ka hoʻomehana ʻana i loko o ka laulā o 100–300°C (212–572°F).Ma hope o ka hoʻoheheʻe ʻana i ka resin puʻupaʻa ma luna o kona wahi hoʻoheheʻe crystalline ma kahi o 342°C (648°F) a hoʻohua i kahi huahana paʻa ʻole o ka PTFE resin.Ke hoʻokō 'ia i loko o ka laina, ua hoʻoholo ka hoʻomehana ʻana i ka laina laina kiʻekiʻe.ʻO ia kahi ʻāpana extrusion e pili ana i ke koho ʻana i ka pae resin.
Ka manawa hoʻouna: Mei-04-2018