Ko te parahi whero, e mohiotia ana ko te parahi whero, he tino pai te hiko o te hiko me te wera wera, te kirihou pai, me te ngawari ki te tukatuka ma te wera wera me te makariri.Kei te whakamahia nuitia i roto i te hanga waea, taura, paraihe hiko, me te parahi waikura hiko mo nga hiko hiko, me etahi atu hua pai.
Ko te hiko me te waiariki o te parahi he tuarua ki te hiriwa, ka whakamahia nuitia ki te hanga taputapu hiko me te waiariki.Ko te parahi he pai te aukati i te waikura i roto i te hau, te wai moana me etahi waikawa kore-oxidizing (waikawa pūhaumāota, waikawa pungatara dilute), alkali, otinga tote me nga momo waikawa waro (waikawa acetic, waikawa citric), ka whakamahia i roto i te ahumahi matū.I tua atu, he pai te weldability o te parahi, a ka taea te tukatuka ki nga momo hua kua oti te mahi me nga hua kua oti ma te tukatuka makariri me te thermoplastic.I te tekau tau atu i 1970, ko te putanga o te parahi whero i nui ake i te katoa o te whakaputanga o etahi atu koranu parahi.
Te wa tuku: Maehe-21-2023