Sera ya polyethylene, yomwe imadziwikanso kuti sera ya polima.Ndi mankhwala omwe ali ndi malo osungunuka kwambiri, kuuma kwakukulu, gloss, mtundu woyera, ndi zina zotero.Lero Qingdao Sainuo akukutengerani ku ...
Sera ya polyamide imakhala ndi magulu ambiri a hydroxyl ndi amide, omwe amatha kupanga mphamvu zamphamvu za hydrogen bond ndikupanga maukonde, potero amawonjezera kukhuthala kwadongosolo kuti akwaniritse zotsutsana ndi kukhazikika ndi zotsutsana ndi sagging....
Sera yolumikizidwa ya polyethylene ndi yabwino kwambiri yolumikiza unyolo wautali chifukwa cha mawonekedwe ake.Gawo lotsika la polyethylene la polyethylene la sera yomezanitsidwa limagwirizana bwino ndi utomoni ndipo limatha kupanga ma intermolecular entanglements.Gulu ndi zodzaza zimapanga mgwirizano wovuta ...
Mwina pali zifukwa ziwiri zosiyana kwambiri za nkhawa za zaka 35: Anthu ena sangaone zam'tsogolo;anthu ena amaona zam’tsogolo mwachidule.Anthu omwe ali ndi zaka pafupifupi 35, kodi pali nkhawa zamakampani?Pali pafupifupi mfundo ziwiri: imodzi ndi botolo la incr ...
Lero, wopanga sera wa pe apitiliza kukambirana nanu kuti mumvetsetse momwe mavutowa amayambira pomwe zida za chingwe za PVC zimatulutsidwa.1. Pamwamba pa PVC chingwe zinthu si zabwino chifukwa chiyani?Kodi kusintha?(1) Utomoni womwe ndi wovuta kuyika pulasitiki umatulutsidwa popanda p ...