Chii chinonzi PU zvinhu?
Tsanangudzo yekutanga yePU zvinhu
PU inomirira Polyurethane, chinhu chepolymer chinoshandiswa zvakanyanya mumaindasitiri akasiyana. Polyurethane inogadzirwa nemakemikari reaction pakati pe isocyanate uye polyol, uye ine huwandu hwakawanda hwemuviri uye makemikari ehupfumi. Nekuti PU inogona kuita kuti zvimiro zvayo zvigadziriswe nekuchinja kuumbwa kwayo, inoshandiswa mumhando dzakasiyana dzekushandisa, kubva pakupfeka kuenda kune zvekuvaka.
Kurongeka uye Zvivakwa zvePU
Polyurethane inogona kuiswa mumhando dzakasiyana siyana, kusanganisira mafuro akaomarara, anochinjika furo, elastomers, machira uye zvinonamira. Mafuro akaomarara anowanzo shandiswa kuvharisa uye mapaneru ekuvaka, nepo mafuro anochinjika achishandiswa zvakanyanya mufenicha, zvigaro zvemotokari uye metiresi. Elastomers, kune rumwe rutivi, anoratidza rabha-kunge elasticity uye anoshandiswa kune shangu, matai uye zvichingodaro. Nekuda kwekunaka kwayo, abrasion kuramba, mafuta kuramba uye kuramba kuchembera, zvinhu zvePU zvinoratidza kuita kwakanakisa mumashandisirwo akasiyana.
Kushandiswa kwePU mumaindasitiri akasiyana
Polyurethane ine huwandu hwakawanda hwekushandisa munzvimbo dzakasiyana. Semuyenzaniso, muindasitiri yemachira, PU inowanzoshandiswa mukugadzira dehwe rekugadzira, rine maumbirwo akafanana nematehwe asi akachipa uye ari nyore kuchengeta. Muindasitiri yekuvaka, PU furo rinoshandiswa seyepamusoro-mhando yekutsikisa zvinhu, inofarirwa kune yakaderera yekupisa conductivity uye yakanaka kunyorova. Muindasitiri yemotokari, zvinhu zvePU zvinoshandiswa kugadzira mafuro ezvigaro uye zvemukati zvimedu zvemukati sezvo zvichipa kunyaradza kwakanaka uye kusimba.
Kushamwaridzana kwezvakatipoteredza uye kusimba kwePU zvinhu
Sezvo kuziva kwezvakatipoteredza kuchiwedzera, kugadzikana kwezvinhu zvePU kwave kunetseka kukuru. Sechinyakare, mamwe makemikari anokuvadza anogona kushandiswa mukugadzirwa kwePU, asi mumakore achangopfuura, indasitiri iyi yakagadzira mamwe maitiro ekugadzira ane hushamwari kwezvakatipoteredza akadai semvura-yakavakirwa polyurethane uye kushandiswa kwezvinhu zvinogonekazve. Izvi zvitsva zvePU zvinhu hazvingodzikisi kukanganisa kwezvakatipoteredza, asi zvakare zvinowedzera kuchengetedza chigadzirwa uye kusimba.
Summary
Chii chinonzi PU zvinhu? Iyo inosiyana-siyana, yakakwirira-inoita polymer zvinhu iyo inoshandiswa zvakanyanya mumaindasitiri akasiyana. Ingave mukupfeka, kuvaka, mota, kana kuchengetedzwa kwezvakatipoteredza, PU inofarirwa neakanakisa physicochemical properties. Nekufambira mberi kwetekinoroji uye nekuvandudzwa kwezvinodiwa zvekuchengetedza kwezvakatipoteredza, chiyero chekushandisa uye tekinoroji yePU zvinhu zvicharamba zvichikura nekuvandudza.