Ngaba PU Lubushushu Sewe?
Pu (i-polyurethane) ulusu sisixhobo sokwenziwa esiqhele ukusetyenziswa njengendawo yofele lokwenyani. Yeyona ndlela ingabiziyo kwaye ingenakhohlakalo enikezela ngoburhabaxa obufanayo kunye nokugqiba njengesikhumba sokwenyani.. Isikhumba sePU sisetyenziswa kakhulu kwiimpahla, izihlangu, iingxowa, ifanitshala, kunye ne-upholstery yeemoto. Kodwa, umbuzo ngulo, i-PU yesikhumba ikhuselekile?
Ukhuseleko lwesikhumba sePU sisihloko ekuthethwa ngaso, njengoko inokuba neempembelelo ezilungileyo nezibi. Kwelinye icala, Isikhumba sePU sithathwa njengekhuselekile ngokwentlalontle yezilwanyana njengoko ayifuni ukubulawa kwezilwanyana okanye ukusetyenziswa kweekhemikhali eziyingozi kwinkqubo yokuvelisa.. Kodwa kwelinye icala, ezinye iinkxalabo zokusingqongileyo kunye nempilo ziye zaphakanyiswa ngenxa yokusetyenziswa kweekhemikhali ezithile ekwenzeni i-PU yesikhumba.
Enye yeenkxalabo eziphambili malunga nokhuseleko lwe-PU yesikhumba kubukho beekhemikhali ezifana ne-DMF (I-Dimethylformamide) kunye neeVOCs (IiCompounds eziguquguqukayo zeOrganic) kwinkqubo yemveliso. I-DMF sisinyibilikisi esisetyenziswa ngokuqhelekileyo ekwenzeni izinto zokwenziwa, kubandakanywa PU ngesikhumba, ukwandisa ukuqina kunye nokuguquguquka. Nangona kunjalo, ichazwe njengeyona tyhefu yiManyano yaseYurophu ngenxa yeengozi zayo zempilo, ezifana nokukrala kwesikhumba, iingxaki zokuphefumla, kunye nomonakalo wesibindi.
Ngaphezulu, iindlela ezahlukeneyo zokuvelisa zinokubangela ukukhutshwa kwezinto eziphilayo eziguquguqukayo (IiVOCs), eziyimichiza eyingozi enokuthi ibangele iingxaki zokuphefumla kunye nokungahambi kakuhle xa ibonakaliswe ngobuninzi. Ukuqinisekisa ukhuseleko lwemveliso yokugqibela, Abavelisi besikhumba be-PU kufuneka balandele izikhokelo kunye nemimiselo engqongqo yokunciphisa ukusetyenziswa kweekhemikhali ezinobungozi kunye nokunciphisa ukukhutshwa kwe-VOC..
Nangona kunjalo, kubalulekile ukuqaphela ukuba isikhumba sePU esihlangabezana nemigangatho yokhuseleko kunye nemimiselo ikhuselekile ukusetyenziswa. Uninzi lweemveliso zesikhumba ze-PU ziyavavanywa kwaye ziqinisekiswe ngabasemagunyeni abafanelekileyo kwaye zithobela imigangatho efana ne-REACH. (Ubhaliso, Uvavanyo, Ugunyaziso, kunye noThintelo lweMichiza) kunye ne-OEKO-TEX, ebeka imida ekusetyenzisweni kweekhemikhali eziyingozi kwimveliso yelaphu kunye nofele.
Ngokokhuseleko lokusingqongileyo, ukuveliswa kwesikhumba sePU kuneempembelelo zokuzinza, njengoko ifuna ukusetyenziswa kwemithombo engahlaziyekiyo kwaye ivelise inkcitho. Izinto ezisetyenziselwa ukuveliswa kwesikhumba sePU, njengeoli ekrwada kunye namalahle, zizixhobo ezisikelwe umda ezinegalelo ekukhutshweni kweegesi zegreenhouse nezonakalise imekobume. Ukongeza, Imveliso yesikhumba yePU yenza inkunkuma eninzi kunye nongcoliseko, kuquka nenkunkuma yeekhemikhali, inkunkuma yamanzi, kunye nenkcitho yamandla.
Nangona kunjalo, njengoko imfuno ye-eco-friendly materials isanda, Abavelisi besikhumba bePU babandakanya iindlela ezizinzileyo, ezifana nokurisayikilishwa kunye nokunyusa umgangatho, ukunciphisa impembelelo yokusingqongileyo yenkqubo yabo yokuvelisa. Ukongeza, Amathuba awohlukeneyo okuphinda asetyenziselwe izinto ezilahlwayo ezifana nesitulo semoto esisetyenzisiweyo ngesikhumba sePU ajongiwe..
Ukuququmbela, ukhuseleko lwesikhumba PU kuxhomekeke kwizinto ezahlukeneyo, kubandakanywa nenkqubo yokuvelisa, Umgangatho, kunye nokuhambelana nemigaqo yokhuseleko. Xa ziveliswa kwaye zisetyenziswa ngokuthembekileyo, Isikhumba se-PU sinokunikezela ngenye indlela ekhuselekileyo nengabiziyo kwisikhumba sokwenyani ngaphandle kokuthomalalisa umgangatho okanye ukuqina.. Abathengi banokuqinisekisa ukhuseleko lweemveliso zabo zesikhumba ze-PU ngokuthenga kwiimpawu ezithembekileyo kunye nabathengisi., kunye nokuqinisekisa ukuba iimveliso abazithengayo zihambelana nokhuseleko kunye nemigangatho yokusingqongileyo. Nje ngeziphumo, Isikhumba sePU sikhuselekile kodwa sigcinelwe ukhuseleko oluzinzileyo kunye nenkxalabo.
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