Menene ma’auni na epoxy resin allo

Domin cimma mafi kyawun tasirin amfani da allon resin epoxy, ana buƙatar wasu sigogi. A cikin masu zuwa, ƙwararrun masana’antun za su ba mu cikakken gabatarwar. Ku zo ku ƙarin koyo game da shi.

Rarraba siga na epoxy guduro takardar: dielectric akai-akai siga, dielectric asarar siga, TG darajar siga

Epoxy resin takardar takarda PCB ce mai fuska biyu tagulla wanda aka yi da resin epoxy + gilashin gilashi. Shafi na FR4 da aka saba amfani da shi na jan karfe yana da madaidaicin dielectric na dangi na 4.2-4.7. Wannan dielectric akai-akai zai canza tare da zafin jiki. A cikin kewayon zafin jiki na digiri 0-70, matsakaicin canjin canjin zai iya kaiwa 20%. Canji a cikin dielectric akai-akai zai haifar da 10% canji a cikin jinkirin layin, kuma mafi girma da yawan zafin jiki, mafi girma jinkiri. Madadin dielectric shima zai canza tare da mitar sigina. Mafi girman mitar, ƙarami na dielectric akai-akai. Gabaɗaya, ƙimar ƙimar dielectric akai-akai shine 4.4. Dielectric akai-akai yana canzawa tare da mita kamar yadda aka nuna a cikin siffa.

Dielectric akai-akai (Dk, ε, Er) yana ƙayyade saurin da siginar lantarki ke tafiya a cikin matsakaici. Gudun da siginonin lantarki ke tafiya ya yi daidai da tushen murabba’in madaurin dielectric. Ƙananan dielectric akai-akai, saurin watsa siginar. Bari mu yi misali na gani. Kamar kuna gudu a bakin rairayin bakin teku, kuma zurfin ruwa yana nutsar da ƙafafu. A danko na ruwa ne dielectric akai. Yawan ruwan da yake da danko, mafi girman madaurin dielectric, kuma a hankali kuke gudu.

Matsakaicin dielectric ba mai sauqi bane don aunawa ko ayyana. Ba wai kawai yana da alaƙa da halayen matsakaicin kanta ba, har ma da hanyar gwaji, mitar gwaji, da yanayin kayan kafin da lokacin gwajin. Dielectric akai-akai kuma zai canza tare da canjin zafin jiki. Wasu abubuwa na musamman suna la’akari da yanayin zafin jiki a cikin ci gaba. Danshi kuma wani muhimmin abu ne da ke shafar ma’aunin wutar lantarki, saboda yawan ruwa na dielectric shine 70, kuma akwai danshi kadan. , zai haifar da gagarumin canje-canje.

Dielectric asarar epoxy guduro takardar: da makamashi asarar a cikin insulating abu saboda hysteresis sakamakon dielectric conductance da dielectric polarization a karkashin tasirin lantarki. Hakanan ana kiransa asarar dielectric, wanda ake kira asarar dielectric. A ƙarƙashin tasirin madaidaicin filin lantarki, madaidaicin kusurwar δ na kusurwar da aka haɗa (angle factor angle Φ) tsakanin phasor na yanzu da ƙarfin lantarki da ke gudana a cikin dielectric ana kiransa kusurwar asarar dielectric. Asarar dielectric na takardar resin epoxy gabaɗaya shine 0.02, kuma asarar dielectric zai ƙaru tare da haɓakar mitar.

TG darajar epoxy guduro takardar: kuma aka sani da gilashin mika mulki zazzabi, kullum 130 ℃, 140 ℃, 150 ℃, 170 ℃.