Tenei rapa raw pono, me te pūkenga

mohiotia Rubber te mai te wa o te kitea o Amerika e Columbus. whakamahia nga Inia te wai Academy o rapa rakau Hevea ki hiritia nga take o poti, te hanga rihi, hū parewai, me te mo te hanga o pōro. Otiia i roto i Europe mo te potae wa roa kore e whakamahia whānuitia (ki runga, ki te rau tau XIX). A no te mea katoa te rapa raw i runga i te wā maroke atu, ka riro pakeke. hoki te tukanga tenenga rapa āhuatanga tuatahi me te tona pāmahana stabilization hanga tōnuitanga tūturu i roto i te hanga o ngā tuhinga rapa.

Ka rite ki te rapa-mahuri e kore i taea e whakarato i te tono tupu vitiviti nei, i runga i te wā, whakawhanakehia reira he tikanga o te whiwhi rapa waihanga, tatou e whakamahi tonu i tenei ra. I roto i te hou te hanga i te rapa, me te rapa pūhui raw. I roto i tona puka raw whakamahia mo te hanga o ngā hua, ka rite ki te tikanga - kekeno, me te hanga o potae me kāmera tikanga wera (te whakaora i). Mai i ranunga whakarato i te whānui o ngā hua momo e kua whakamahia i roto i tata rāngai katoa. Rua tetahi me ētahi atu rauemi e wātea ana i roto i te puka o whārangi Unuhia tonu (tukutuku) ranei. Wāhui taea e ratou rawa rerekē - hauora, kai, uruhanga, te hinu-ātete, etc.

Ko te whakamahi o te rapa raw mō te pakaru potae

Kaitaraiwa maha haukotia ki ngā take o te kino aunoa ki te tupare (me te kāmera). I roto i te nuinga o te wā, e taea te hanga ko te huira pakaru. Ka taea te mahi i tēnei e rua vulcanization matao, me te wera. whakamana matao kei te whakamahi i te hanganga motuhake (apa activator butyl), me te vulcanisation wera - rapa masivesivá.

Ko te wāhanga pūhui rapa i te vulcanization matao whakamana te kahore maimoatanga wera. e tenei tikanga nui roa me titau pipiki tino ki te hangarau whakapumautia. Ka taea te whakamana haamărôraa Hot i roto i te katoa, tae atu me te i roto i te mara, tikanga. Me whiwhi tēnei anake te rapa raw me te vulcanizer. kia haamărôraa pahoho, kawe (rere i 220) me te kawe (rere pereoo i runga i te whatunga).

Me pēhea te ki te whakamahi i te rapa raw i roto i vulcanization

Tuatahi o te katoa, te rohe pakaru kia ata horoia o paru, hamani pepa me te degrease. Na e hiahia ana koe ki te hoatu i runga i tapahia i te rapa faufau ka whakanohoia i roto i te vulcanizer te papaki mo. Kia kore ai adhesion i waenganui i te papaki, me te huānga whakawera he nuinga he whārangi o te pepa me'ume'uraa.

rite te ahua o te ranunga kirihou nei i roto i vulcanization ô makona hohonu ki te lesion titiro rapa faufau, me te humarie kötui reira. A, no te wera, riro te reira kaha, engari tonu ngāwari. Ko te pāmahana i i puta haamărôraa ko e pā ana ki 140-160 ° ^C. runga ki pa tenei pāmahana (whakaritea e te huringa i roto i te tae o te pepa) vulcanizer momotuhia. Kia te tino te matao o te hua, he mea rite hoki te whakamahi anō.

Ehara i ape i piki pāmahana i runga i 160 ^{° C tūtohu,} rite arata'i tenei ki desiccation o rapa me te, rite te tupu - ki te mate o te elasticity.