Kuyini isikhumba se-PU?

Isikhumba se-PU sibizwa ngokuthi isikhumba se-polyurethane, okuyisikhumba esenziwe ngezinto ze-polyurethane. Isikhumba se-Pu siyisikhumba esivamile, esisetshenziswa kabanzi emikhiqizweni eyahlukahlukene yemboni, njengezingubo, izicathulo, ifenisha, ingaphakathi lezimoto nezesekeli, ukupakisha kanye neminye imboni.

Ngakho-ke, isikhumba se-pu sithatha indawo ebaluleke kakhulu emakethe yesikhumba.

Kusukela enkambisweni yokukhiqiza kanye nomqondo wokuvikela imvelo, isikhumba se-pu sihlukaniswe kakhulu sibe izinhlobo ezimbili zesikhumba se-pu esiphinde sasetshenziswa kanye nesikhumba se-pu sendabuko.

Uyini umehluko phakathi kwezinhlobo ezimbili zesikhumba?

Ake siqale sibheke umehluko ezinqubweni zabo zokukhiqiza.

Inqubo yokukhiqiza isikhumba se-pu yendabuko:

1. Isinyathelo sokuqala ekukhiqizweni kwesikhumba se-pu ukwenza i-polyurethane, kanti i-isocyanate (noma i-polyol) kanye ne-polyether, i-polyester nezinye izinto zokusetshenziswa kwenziwa i-polyurethane resin ngokusebenzisa ukusabela kwamakhemikhali.

2. Ukumboza i-substrate, i-polyurethane resin embozwe i-substrate, njengoba ubuso besikhumba se-pu bunjalo, i-substrate ingakhethwa ngezindwangu ezahlukahlukene, njengokotini, indwangu ye-polyester, njll., noma ezinye izinto zokwenziwa.

3. Uma icutshungulwa futhi iphathwa, i-substrate embossed iyacutshungulwa futhi iphathwe, njengokuqopha, ukuphrinta, ukudaya nezinye izinqubo, ukuze kutholakale ukuthungwa, umbala kanye nomphumela wobuso obudingekayo. Lezi zinyathelo zokucubungula zingenza isikhumba se-PU sibukeke njengesikhumba sangempela, noma sibe nomphumela othile wokuklama.

4. Ngemva kokwelashwa: Ngemva kokuqeda ukucutshungulwa, isikhumba se-PU singadinga ukuthatha izinyathelo ezithile ngemuva kokwelashwa, njengokuvikelwa kokumboza, ukwelashwa okungangeni manzi, njll., ukuze kuthuthukiswe ukuqina kwaso kanye nezici zaso.

5. Ukulawulwa kwekhwalithi nokuhlolwa: Kuzo zonke izigaba zokukhiqiza, kuzokwenziwa ukulawulwa kwekhwalithi nokuhlolwa ukuqinisekisa ukuthi isikhumba se-PU sihlangabezana nezidingo zomklamo kanye nemininingwane.

Inqubo yokukhiqiza isikhumba se-pu esiphinde sasetshenziswa:

1. Qoqa futhi uvuselele imikhiqizo ye-polyurethane engcolile, njengemikhiqizo yesikhumba esidala se-pu, imfucuza yokukhiqiza, ngemva kokuhlunga nokuhlanza ukungcola okungaphezulu kanye nokungcola, bese uyomisa;

2. Gaya izinto ze-polyurethane ezihlanzekile zibe yizinhlayiya ezincane noma impuphu;

3. Sebenzisa i-mixer ukuxuba izinhlayiya ze-polyurethane noma izimpushana ezinama-prepolymers e-polyurethane, ama-filler, ama-plasticizer, ama-antioxidants, njll., bese uzifaka emishinini yokushisa ukuze kusetshenziswe amakhemikhali ukuze kwakheke i-matrix entsha ye-polyurethane. I-matrix ye-polyurethane ibe seyenziwa ifilimu noma isimo esithile ngokufaka, ukumboza noma ukufaka ikhalenda.

4. Izinto ezibunjiwe ziyashiswa, zipholiswe futhi zilungiswe ukuqinisekisa izakhiwo zomzimba kanye nokuqina kwamakhemikhali.

5. Isikhumba se-pu esiphinde sasetshenziswa esilungisiwe, esimboziwe, esimboziwe, esidaywe kanye nokunye ukwelashwa kwendawo ukuze kutholakale ukubukeka nokuthungwa okufiselekayo;

6. Yenza ukuhlolwa kwekhwalithi ukuze ihlangabezane nezindinganiso nezidingo ezifanele. Bese ngokwezidingo zamakhasimende, sika zibe osayizi abahlukene kanye nezimo zesikhumba esiqediwe;

Ngenqubo yokukhiqiza, kungaqondakala ukuthi uma kuqhathaniswa nesikhumba sendabuko se-pu, isikhumba se-pu esiphinde sasetshenziswa sinaka kakhulu ukuvikelwa kwemvelo kanye nokusetshenziswa kabusha kwezinsiza, kunciphisa ukungcoliswa kwemvelo. Sinezitifiketi ze-GRS zesikhumba se-pu kanye ne-pvc, ezihambisana nomqondo wentuthuko esimeme kanye nokuvikelwa kwemvelo, kanye nokusebenza ekukhiqizeni isikhumba.