Nā huahana PTFE a me nā hiʻohiʻona

He haʻahaʻa nā waiwai mechanical o PTFE ke hoʻohālikelike ʻia me nā plastics ʻē aʻe, a hiki ke hoʻohana ʻia ma luna o kahi ākea ākea o -100°F a +400°F (-73°C a 204°C).).Loaʻa iā ia nā waiwai insulation wela a me ka uila a me ka coefficient haʻahaʻa o ka friction.ʻOi loa ka PTFE a ʻaʻole hiki ke hana ʻia e ka hoʻoheheʻe ʻana.Pono e hoʻopili ʻia a hoʻopaʻa ʻia ʻo PTFE e hana i nā ʻano kūpono.

Pepa PTFE, Rod, & Tube- ʻO PTFE kūpaʻa wela kekahi o nā mea paʻa paʻa thermally.ʻAʻohe decompositions mahalo ʻia ma 260 ° C, no laila ʻo PTFE, i kēia mahana, loaʻa ka hapa nui o kāna mau waiwai.Hoʻomaka ka decomposition maikaʻi ma luna o 400°C.Nā wahi hoʻololi PTFE-ʻO ka geometry o nā molekala PTFE (ka hoʻolālā crystalline) ʻokoʻa me ka mahana.Aia nā wahi hoʻololi like ʻole, me nā mea nui loa penei: ma 19 ° C e pili ana i ka hoʻololi ʻana o kekahi mau waiwai kino a ma 327 ° C e pili ana i ka nalo ʻana o ke ʻano crystalline: manaʻo ka PTFE i kahi ʻano amorphous. ka mālama ʻana i kona ʻano geometric ponoʻī.Hoʻonui PTFE-ʻO ka linear thermal expansion coefficient e like me ka mahana.Eia kekahi, ma muli o ka orientation i hoʻokumu ʻia e ke kaʻina hana, nā ʻāpana PTFE maʻamau he anisotropic;ʻo ia hoʻi, ʻokoʻa ka coefficient o ka hoʻonui e pili ana i ka kuhikuhi.PTFE Thermal conductivity-ʻAʻole like ka coefficient o ka thermal conductivity o PTFE me ka mahana.He mea kiʻekiʻe, no laila hiki ke noʻonoʻo ʻia ʻo PTFE he mea insulating maikaʻi.ʻO ka hui ʻana o nā mea hoʻopihapiha kūpono e hoʻomaikaʻi i ka conductivity thermal (e ʻike i ka PTFE piha).PTFE wela kūikawā- Hoʻonui ka wela kikoʻī, a me ka ʻike wela (enthalpy) me ka mahana.ʻO ka hana PTFE i mua o nā ʻelele haolePTFE Kū'ē i nā mea hana kemika-Maikaʻi ʻole ʻo PTFE i nā mea i ʻike ʻia a me nā pūhui.Hoʻouka ʻia ʻo ia e nā metala alkaline ma ka mokuʻāina haʻahaʻa, e Chlorine trifluoride a me Fluorine elementary i nā wela kiʻekiʻe a me nā kaomi.PTFE Solvent kū'ē- ʻAʻole hiki ke hoʻoheheʻe ʻia ʻo PTFE i nā mea hoʻoheheʻe a pau ma kahi o 300 ° C.ʻO nā hydrocarbons fluorinated ke kumu o kekahi pehu a hiki ke hoʻohuli ʻia;kekahi mau aila fluorinated loa, ma nā mahana ma luna o 300°C, e hoʻohana i kekahi hopena dissolving ma luna o PTFE.ʻO ka PTFE Ke kū'ē i nā mea hana lewa a me ka māmā-ʻO nā ʻāpana hoʻāʻo o PTFE, i hōʻike ʻia no nā makahiki he iwakālua i nā kūlana climatic ʻokoʻa loa, ʻaʻole i hōʻike i kahi hoʻololi o kā lākou mau ʻano.PTFE Ke kū'ē i nā radiations-ʻO nā radiation ikehu kiʻekiʻe ke kumu i ka haki ʻana o ka mole PTFE, no laila ʻoi aku ka maikaʻi o ke kūʻē ʻana o ka huahana i nā radiations.PTFE Gas permeability-ʻO ka permeability o PTFE e like me nā mea plastic ʻē aʻe.ʻAʻole hilinaʻi ka permeability, maopopo, ma ka mānoanoa a me ke kaomi wale nō, akā ma nā ʻenehana hana.ʻAno kino - mechanicalʻO nā waiwai tensile a me ka compressive ʻO kēia mau waiwai i hoʻololi nui ʻia e nā kaʻina hana a me ka pauda i hoʻohana ʻia.ʻO ka PTFE naʻe, hiki ke hoʻohana mau ʻia i nā mahana a hiki i 260 ° C, ʻoiai e loaʻa ana kekahi plasticity compressive i nā mahana kokoke i ka Zero piha.ʻO ka hoʻololi ʻana o ka PTFE-He maʻalahi loa ka PTFE a ʻaʻole e uhaʻi i ka wā i hoʻokau ʻia i nā koʻikoʻi o 0,7 N / mm2 e like me ASTM D 790. ʻO ka modulus flexural e pili ana i 350 a 650 N / mm2 i ka lumi wela, e pili ana i 2000 N / mm2 ma -80 ° C , ma kahi o 200 N/mm2 ma 100°C a ma kahi o 45 N/mm2 ma 260°C.Nā waiwai piliLoaʻa iā PTFE nā hiʻohiʻona resilience kiʻekiʻe loa i nā haʻahaʻa haʻahaʻa.Hoʻomanaʻo palaki-Inā hoʻokomo ʻia kahi ʻāpana o ka PTFE i ka tensile a i ʻole ke koʻikoʻi ma lalo o ka helu hua, ʻo kahi hapa o nā deformations hopena e mau ana (e like me nā deformations mau loa) ma hope o ka hoʻopau ʻana o nā koʻikoʻi, me ka hopena i hoʻokomo ʻia kekahi mau ʻāpana i ka ʻāpana.Inā hoʻomaʻamaʻa ʻia ka ʻāpana, e hoʻokuʻu kēia mau ʻāpana iā lākou iho i loko o ka ʻāpana e hoʻi hou i kona ʻano kumu.Hōʻike pinepine ʻia kēia waiwai o ka PTFE ma ke ʻano he "plastic memory" a hoʻohana ʻia i nā noi like ʻole.ʻO ka hapa nui o nā huahana semi-finished, ma muli o nā kaʻina hana hoʻololi, loaʻa nā ʻano like ʻole, i kekahi pae.Ke makemake ʻia e loaʻa nā ʻāpana semi-finished dimensionally stable i nā wela kiʻekiʻe, hiki ke hoʻokuʻu i nā ʻāpana i kahi mahana o 280 ° C no hoʻokahi hola i kēlā me kēia 6 mm o ka mānoanoa a laila hoʻomaha mālie.ʻO nā ʻāpana i loaʻa ma kēia ʻano ʻaneʻane ʻokoʻa loa mai nā ʻili o loko a ʻike ʻia ma ke ʻano he mea "conditioned" a i ʻole "thermostabilised".ʻoʻoleʻa-ʻO ka paʻakikī Shore D, ana ʻia e like me ke ʻano ASTM D 2240, aia nā waiwai ma waena o D50 a me D60.Wahi a DIN 53456 (hoʻouka i ka 13,5 Kg no 30 kekona) ʻoi aku ka paʻakikī ma waena o 27 a me 32 N / mm2.Paʻi ʻana-Loaʻa iā PTFE nā mea haʻahaʻa haʻahaʻa haʻahaʻa o nā mea paʻa a pau;ma waena o 0.05 a me 0.09:* ʻaneʻane like nā coefficient friction static a me ka ikaika, no laila ʻaʻohe hana hopu a i ʻole ka hana lāʻau.* i ka wā e hoʻonui ai i ka ukana, e emi ana ka friction coefficient a hiki i ka waiwai paʻa* piʻi ka pānaʻi ʻana me ka wikiwiki* e mau ana ka heluna friction ma nā ʻano wela.ʻaʻahu-ʻO ka ʻaʻahu e pili ana i ke ʻano o ka ʻili ʻē aʻe a hilinaʻi ʻia i ka wikiwiki a me nā ukana.Hoʻemi nui ʻia ka lole i ka hoʻohui ʻana i nā mea hoʻopiha kūpono i ka PTFE (e ʻike i ka PTFE i hoʻopiha ʻia).Nā waiwai uilaPTFE InsulationʻO ka PTFE kahi insulator maikaʻi loa a me ka dielectric waiwai e like me ka hōʻike ʻana i ka ʻikepili pili i hōʻike ʻia ma ka datasheet a mālama i kēia mau hiʻohiʻona i loko o kahi nui o nā kūlana kaiapuni, nā mahana a me nā alapine.Ka ikaika dielectric-ʻO ka ikaika dielectric o PTFE e like me ka mānoanoa a emi iho me ka hoʻonui pinepine.Hoʻomau mau ia a hiki i 300°C a ʻaʻole ʻokoʻa ʻoiai ma hope o ka mālama lōʻihi ʻana i nā wela kiʻekiʻe (6 mahina ma 300°C).Aia nō ma luna o nā kaʻina hana hoʻololi.Dielectric mau a me ka dissipation kumu -PTFE loaʻa haʻahaʻa dielectric mau a me dissipation kumu waiwai;ʻAʻole hoʻololi kēia mau mea a hiki i 300°C, ma ke kahua alapine a hiki i ka 109 Hz ʻoiai ma hope o ka mālama wela lōʻihi (6 mahina ma 300°C).ʻO ka dielectric mau, dissipation factor a me ka volume resistivity a me ka surface resistivity, i manaʻo ʻia he kūʻokoʻa mai nā kaʻina hana hoʻololi.ʻAka-kūʻē- He kū'ē maikaʻi ka PTFE i ka arc.ʻO ka manawa kūpaʻa arc e like me ASTM D 495 he 700 sec..Ma hope o ka hana lōʻihi, ʻaʻohe hōʻailona o ka ʻili o ka ʻili.Ka pale ʻana i ka hopena Corona-ʻO ka hoʻokuʻu ʻia ʻana e ka hopena corona hiki ke hopena i nā erosions o ka ʻili PTFE, akā naʻe, ua hōʻike ʻia he insulator kūpono inā loaʻa nā ʻokoʻa kiʻekiʻe.Nā waiwai o ka ʻiliʻO ka hoʻonohonoho molecular o PTFE e lawe mai i kona mau papa i kahi anti-adhesiveness kiʻekiʻe.No ke kumu like ʻole kēia mau ʻili i hiki ʻole ke pulu, ʻo ka huina pili me ka wai ma kahi o 110 ° a hiki ke hōʻoia ʻia, ma waho aʻe o ka haʻalulu ʻili o 20 dine/cm, ʻaʻole pulu hou ka wai i ka PTFE.ʻO ka hoʻomaʻamaʻa etching kūikawā e hoʻopaʻa ʻia nā ʻili a hiki ke pulu.