Ulusi Wopanga

Njira yokonzekera
Magwero awiri akuluakulu a rayon ndi petroleum ndi biological sources.Ulusi wopangidwanso ndi rayon wopangidwa kuchokera kuzinthu zachilengedwe.Njira yopangira ntchentche imayamba ndi kutulutsa kwa alpha-cellulose (yomwe imadziwikanso kuti zamkati) kuchokera ku zida za cellulose.Zamkati izi zimakonzedwa ndi caustic soda ndi carbon disulfide kuti apange cellulose yamtundu wa lalanje sodium xanthate, yomwe imasungunuka mu njira yothetsera sodium hydroxide.Kusamba kwa coagulation kumapangidwa ndi sulfuric acid, sodium sulfate, ndi zinc sulfate, ndipo mucilage umasefedwa, kutenthedwa (kuyikidwa pa kutentha kwapadera kwa maola pafupifupi 18 mpaka 30 kuti muchepetse esterification ya cellulose xanthate), yonyowa, kenako yonyowa. wopota.Mu coagulation bath, sodium cellulose xanthate imawola ndi sulfuric acid, zomwe zimapangitsa kuti cellulose ipangidwenso, mpweya, komanso kupanga cellulose fiber.

Gulu Silika wolemera, ulusi wokhuthala, ulusi wa nthenga, silika wochita kupanga wosanyezimira

Ubwino wake
Ndi mikhalidwe ya hydrophilic (kubwerera kwa chinyezi cha 11%), viscose rayon ndi nsalu yapakatikati mpaka yolemetsa yokhala ndi mphamvu yabwino komanso kukana abrasion.Ndi chisamaliro choyenera, ulusi umenewu ukhoza kutsukidwa ndi kutsukidwa m'madzi opanda magetsi osasunthika kapena mapiritsi, ndipo siwokwera mtengo.

Zoipa
Rayon's elasticity ndi kulimba mtima kwake ndizosauka, zimachepa kwambiri pambuyo posambitsidwa, komanso zimagwidwa ndi nkhungu ndi mildew.Rayon imataya 30% mpaka 50% ya mphamvu yake ikanyowa, choncho chisamaliro chiyenera kutengedwa pochapa.Pambuyo kuyanika, mphamvu imabwezeretsedwa (kuwongolera viscose rayon - high wet modulus (HWM) viscose fiber, palibe vuto lotere).

Ntchito
Ntchito zomaliza za rayon zili m'minda ya zovala, upholstery, ndi mafakitale.Zitsanzo ndi nsonga za akazi, malaya, zovala zamkati, makoti, nsalu zolendewera, mankhwala, zopanda nsalu, ndi zinthu zaukhondo.

Kusiyana kwa rayon
Silika yochita kupanga imakhala ndi kuwala kowala, mawonekedwe owoneka bwino komanso olimba, komanso kumva konyowa komanso kuzizira.Ikakhala yokhwinyata komanso yosakhwinyata ndi dzanja, imapanga makwinya ambiri.Ikaphwanyidwa, imasunga mizere.Pamene mapeto a lilime anyowa ndikugwiritsidwa ntchito kutulutsa nsalu, silika wochita kupanga amawongoka mosavuta ndikusweka.Pamene youma kapena yonyowa, elasticity imasiyana.Zidutswa ziwiri za silika zikatikita, zimatha kumveka momveka bwino.Silika amadziwikanso kuti “silika,” ndipo akamangirira kenako n’kumasulidwa, makwinya saonekera kwenikweni.Zopangira silika zimakhalanso zowuma komanso zonyowa.