Robar halitta wani abu ne na halitta wanda aka yi shi da polyisoprene a matsayin babban sashi. Tsarin kwayoyin halittarsa shine (C5H8)n. Kashi 91% zuwa 94% na abubuwan da ke cikinsa sune hydrocarbons na roba (polisoprene), sauran kuma furotin ne. Abubuwan da ba na roba ba ne kamar fatty acids, toka, sukari, da sauransu. Robar halitta ita ce robar da aka fi amfani da ita a aikace.
Roba Mai Haɗaka: Roba Mai Haɗaka yana nufin cewa abun da ke cikin robar halitta shine kashi 95%-99.5%, kuma an ƙara ƙaramin adadin stearic acid, robar styrene-butadiene, robar butadiene, robar isoprene, zinc oxide, carbon black ko peptizer.
Sunan kasar Sin: robar roba
Sunan Turanci: robar roba
Ma'ana: Abu ne mai laushi sosai wanda ke da nakasa mai iya canzawa bisa ga mahaɗan polymer na roba.
●Rarraba roba
An raba roba zuwa rukuni uku: roba ta halitta, robar da aka haɗa, da robar roba ta roba.
Daga cikinsu, robar halitta da robar da aka haɗa su ne manyan nau'ikan da muke shigo da su a yanzu; robar roba tana nufin waɗanda aka fitar daga man fetur, don haka ba za mu yi la'akari da ita a yanzu ba.
Roba ta halitta (roba ta halitta) tana nufin roba da aka yi daga shuke-shuken da ke samar da roba ta halitta. Ana yin roba mai hade ta hanyar haɗa roba ta halitta da ƙaramin robar roba da wasu samfuran sinadarai.
● Roba na halitta
An raba robar halitta zuwa roba ta yau da kullun da robar da aka yi hayaki bisa ga tsarin masana'antu daban-daban. Robar da aka yi daidai ita ce roba ta yau da kullun. Misali, robar da aka yi daidai da ita a China ita ce robar da aka yi daidai da ita a China, wacce aka takaita a matsayin SCR, haka nan kuma akwai SVR, STR, SMR da sauransu.
Manna na yau da kullun yana da ma'auni daban-daban, kamar SVR3L, SVR 5, SVR10, SVR20, SVR 50… da sauransu; gwargwadon girman lambar, girman lambar, ingancin ya yi muni; ƙaramin lambar, ingancin ya fi kyau (abu mafi mahimmanci don bambance tsakanin nagarta da mugunta. Abin da ya fi muhimmanci shine tokar da abubuwan da ke cikin samfurin, ƙarancin tokar, ingancin ya fi kyau).
Manna takardar hayaƙi shine Ribbed Smoked Sheet, wanda ke nufin siririn roba mai hayaƙi, wanda aka taƙaita shi da RSS. Wannan taƙaitaccen bayanin ya bambanta da manne na yau da kullun, kuma ba a rarraba shi bisa ga wurin samarwa ba, kuma yanayin magana iri ɗaya ne a wurare daban-daban na samarwa.
Akwai kuma nau'ikan manne na takarda mai hayaƙi daban-daban, RSS1, RSS2, RSS3, RSS4, RSS5, iri ɗaya, RSS1 kuma shine mafi kyawun inganci, RSS5 shine mafi munin inganci.
● Roba mai hadewa
Ana yin sa ne ta hanyar haɗawa da tace robar halitta da ɗan robar roba da wasu kayayyakin sinadarai. Tsarin robar da aka fi amfani da ita shine wannan, kamar robar Malaysia mai hade da roba SMR 97% SMR 20 (roba ta Malaysia) + 2.5% SBR (roba ta styrene butadiene, robar roba mai hade) + 0.5% acid na stearic acid).
Robar da aka haɗa ta dogara ne akan robar halitta wadda ta ƙunshi babban ɓangarenta. Ana kiranta da compound. Kamar yadda aka ambata a sama, babban bangaren shine SMR 20, don haka ana kiransa da compound ɗin roba na Malaysia No. 20; akwai kuma compound ɗin takardar hayaki da compound ɗin roba na yau da kullun.
Lokacin Saƙo: Nuwamba-17-2021
