Kuyini ukwaziswa kwe-pu?
Ukuchazwa Okuyisisekelo Kwezinto Ze-PU
I-Pu imi ye-polyurethane, impahla ye-polymer esetshenziswa kabanzi emikhakheni ehlukahlukene. I-Polyurethane ikhiqizwa ukusabela kwamakhemikhali phakathi kwe-isocyanate ne-polyol, futhi inezakhiwo eziningi zenyama nangamakhemikhali. Ngoba i-PU ingaba nezindawo zayo ezilungiswe ngokushintsha ukwakheka kwalo, isetshenziswa ezinhlobonhlobo zezicelo, kusuka kuma-probel ezintweni zokwakha.
Ukuhlukaniswa nezakhiwo ze-pu
I-Polyurethane ingahlukaniswa ibe ngamafomu ahlukahlukene, kufaka phakathi amagwebu aqinile, amagwebu aguqukayo, ama-lastomers, ukumboza kanye nama-adhesives. Ama-foam aqinile asetshenziselwa ukusetshenziselwa ukufakwa kanye namaphaneli wokwakha, ngenkathi amagwebu aguquguqukayo asetshenziswa kabanzi efenisha, izihlalo zemoto nakumatilasi. Ngakolunye uhlangothi, ama-elastomers akhombisa ukuqina okufana nerabha futhi asetshenziselwa izicathulo, amathayi nokunye. Ngenxa yokuqina kwayo okuhle, ukumelana ne-abrasion, ukumelana kawoyela kanye nokumelana nokuguga, izinto ze-pu kukhombisa ukusebenza okuhle kwezicelo ezihlukile.
Ukusetshenziswa kwe-PU ezimbonini ezahlukahlukene
I-Polyurethane inezinhlobonhlobo zezicelo emikhakheni ehlukene. Isibonelo, embonini yezindwangu, i-PU isetshenziswa kakhulu ekukhiqizweni kwesikhumba sokufakelwa, esinokwehla okufana nesikhumba kodwa kushibhile futhi kulula ukulugcina. Embonini yezokwakha, i-PU FOAM isetshenziswa njengezinto ezisezingeni eliphakeme zokufakelwa, ezithandwa ngokuvuselelwa kwayo okuphansi okuphansi kanye nokuphikiswa okuhle komswakama. Embonini yezimoto, izinto ze-pu zisetshenziselwa ukukhiqiza amagwebu esihlalo nezingxenye zangaphakathi ze-trim njengoba zinikeza induduzo enkulu nokuqina.
Ubungane bezemvelo kanye nokusimama kwezinto ze-pu
Njengoba ukuqwashisa ngezemvelo kukhuphuka, ukuqina kwezinto zokwenziwa kwe-pu sekuyinto ekhathazayo enkulu. Ngokwesiko, amanye amakhemikhali alimazayo angasetshenziswa ekukhiqizeni i-PU, kepha eminyakeni yamuva nje, imboni iye yathuthukisa izinqubo zokukhiqiza ezinobungane ezemvelo ezinjenge-polyurethane esekelwe emanzini kanye nokusetshenziswa kwezinto zokusetshenziswa kabusha. Lezi zinto ezintsha ze-pu azinciphisi nje umthelela emvelweni, kepha futhi zithuthukisa ukuphepha komkhiqizo nokusimama.
Ukubeka kafushane
Kuyini ukwaziswa kwe-pu? Kuyinto eguquguqukayo, esebenza kahle ye-polymer esetshenziswa kabanzi ezinhlokweni ezahlukahlukene. Noma ngabe ngezingubo, ukwakhiwa, izimoto, izimoto, noma ukuvikelwa kwezemvelo, i-PU iyathandwa ngezinto zayo ezinhle kakhulu ze-physicochemical. Ngokuthuthuka kobuchwepheshe kanye nokwenza ngcono izidingo zokuvikelwa kwemvelo, ubukhulu besicelo kanye nezinga lobuchwepheshe lezinto zokwenziwa kwe-pu kuzoqhubeka ukwandisa nokwenza ngcono.