Expanded polystyrene (EPS), extruded polystyrene (XPS) ndi polyurethane (PU) pakadali pano ndi zinthu zitatu zomwe zimagwiritsidwa ntchito kwambiri pakutchinjiriza khoma.Pakati pawo, PU pakadali pano imadziwika kuti ndiyo njira yabwino kwambiri yotchinjirizira padziko lapansi, yomwe imakhala ndi matenthedwe otsika kwambiri pakati pa zida zonse zotchinjiriza.Pamene kachulukidwe a PU okhwima ndi 35 ~ 40 kg/m3, matenthedwe madutsidwe ake ndi 0.018 ~ 0.023W/(mK) yekha.Mphamvu yotchinjiriza ya thovu lolimba la PU la 25mm ndi lofanana ndi la EPS la 40mm-thick, 45mm-thick mineral wool, 380mm-thick konkriti kapena 860mm-wamba njerwa.Kuti mukwaniritse zomwezo, makulidwe ake ndi pafupifupi theka la EPS.

Lipoti laposachedwa linanena kuti chimodzi mwa zifukwa zomwe zinachititsa kuti moto ufalikire mofulumira ku Hangzhou Ice ndi Snow World chinali chakuti zipangizo zotsekemera za PU ndi zomera zobiriwira za pulasitiki zomwe zimagwiritsidwa ntchito m'nyumbazi sizinakwaniritse zofunikira za kusayaka ndi kuzizira kwamoto, ndipo utsiwo unafalikira msanga moto utatha.Chifukwa chachiwiri ndikuti miyeso yolekanitsa moto ndi njira zopewera utsi pakati pa Hangzhou Ice ndi Snow World ndi madera ena mnyumbayi sizinalipo.Khoma lamkati limapangidwa ndi gulu la masangweji a PU, ndipo zitseko zotuluka ndi zitseko zotenthetsera zotenthetsera m'malo mwa zitseko zamoto, zomwe zidapangitsa kuti motowo ufalikire mwachangu kuchipinda chonse chachiwiri moto utayaka.

Chimodzi mwa zomwe zimayambitsa ngozi ndi chakuti moto utatha, zipangizo monga PU ndi zomera zapulasitiki zinawotchedwa m'dera lalikulu, kutulutsa utsi wochuluka wautsi woopsa kwambiri, ndipo utsi woyaka wotuluka unkasonkhana ndipo pamapeto pake unayambitsa kuphulika, kubweretsa ovulala.

Mwadzidzidzi, zida zotchinjiriza za PU zidakhala chandamale chotsutsidwa ndikugwera mkuntho wamalingaliro a anthu!

Poganizira za ndimeyi, zolankhulazo zimakhala za mbali imodzi, ndipo pali zolakwika ziwiri.

Choyamba: Zida zotetezera za PU ndi zomera zobiriwira za pulasitiki zomwe zimagwiritsidwa ntchito m'nyumbazi sizinakwaniritse zofunikira za kusayaka komanso kuyatsa moto.

Malinga ndi Gulu la GB8624-1997 la Kuwotcha Makhalidwe a Zomangamanga, B2-level polyurethane ikhoza kukwezedwa mpaka mulingo wa B1 mutawonjezera zoletsa zapadera zamoto.Ngakhale matabwa otchinjiriza a PU ali ndi mawonekedwe azinthu zakuthupi, amatha kufikira kalasi ya B1 yoyaka moto pansi pamikhalidwe yamakono.Kuphatikiza apo, pali zopinga zaukadaulo ndi zovuta pakupanga ndi kupanga ma board a B1-level PU.Ma board a PU opangidwa ndi mabizinesi ang'onoang'ono komanso apakatikati aku China amatha kufikira mulingo wa B2 kapena B3.Komabe, opanga angapo akuluakulu ku China angakwanitsebe.Ma board otchinjiriza a PU amapangidwa kuchokera ku polyether yophatikizika ndi PMDI (Polymethylene polyphenyl polyisocyanate) kuti achite thovu ndipo amatchulidwa ngati B1-retardant flame-retardant ndi muyezo GB8624-2012.Izi organic kutchinjiriza zinthu makamaka ntchito m'minda ya nyumba zopulumutsira mphamvu mpanda, yaikulu kusungirako ozizira ndi ozizira unyolo kutchinjiriza.Itha kugwiritsidwanso ntchito popewera moto komanso kutsekemera kwamafuta m'mafakitale, zombo, magalimoto, zomangamanga zosungira madzi ndi magawo ena ambiri.

Chachiwiri: Utsiwo umafalikira mofulumira moto ndi PU zotetezera zinthu zimakhala zapoizoni.

Panali mkangano wambiri wokhudzana ndi kawopsedwe wa polyurethane, makamaka pamene ngozi monga PU zidayaka moto.Pakadali pano, polyurethane yochiritsidwa imadziwika kuti ndi yopanda poizoni, ndipo zida zina zachipatala za PU zakhala zikugwiritsidwa ntchito pazida ndi zida zachipatala zomwe zimayikidwa.Koma polyurethane yosachiritsika imatha kukhala poizoni.Olimba PU thovu ndi mtundu wa zipangizo thermosetting.Ikatenthedwa, mpweya wa carbonized umapangidwa pamwamba pake, ndipo mpweya wa carbonized ungalepheretse kuti lawi lisafalikire.EPS ndi XPS ndi zida za thermoplastic zomwe zimasungunuka ndikudontha zikayaka moto, ndipo madontho awa amathanso kuyaka.

Moto sikuti umangobwera chifukwa cha zinthu zotsekereza.Zomangamanga ziyenera kutengedwa ngati dongosolo.Kugwira ntchito kwa moto kwa dongosolo lonse kumakhudzana ndi zinthu zosiyanasiyana monga kasamalidwe ka zomangamanga ndi kukonza tsiku ndi tsiku.Ndizofunikira pang'ono kutsindika mwachimbulimbuli kuti zida zomangira sizimayaka moto.Kunena zoona, nkhaniyo ndi yabwino.Chinsinsi chake ndikuchigwiritsa ntchito moyenera komanso bwino. ”Zaka zambiri zapitazo, a Li Jianbo, wachiwiri kwa mlembi wamkulu wa China Polyurethane Industry Association, adatsindika mobwerezabwereza nkhani ngati izi m'mabwalo ndi masemina osiyanasiyana.Kasamalidwe ka chipwirikiti pa malo omangira komanso kusayang'anira bwino kwa zinthu zosayenera komanso zosagwirizana ndizomwe zimayambitsa moto, ndipo sitiyenera kuloza chala kuzinthu pakagwa vuto.Choncho ngakhale panopa, vuto likadalipo.Kuzindikiridwa mwakhungu ngati vuto la zida za PU, zomaliza zitha kukhala za mbali imodzi.

Chidziwitso: Nkhaniyi idatengedwa kuchokera ku https://mp.weixin.qq.com/s/8_kg6ImpgwKm3y31QN9k2w (ulalo walumikizidwa).Pokhapokha kuyankhulana ndi kuphunzira, osachita zina zamalonda, sikuyimira maganizo ndi malingaliro a kampani, ngati mukufuna kusindikizanso, chonde funsani wolembayo woyambirira, ngati pali kuphwanya, chonde tilankhule nafe nthawi yomweyo kuti tichite kukonza.