He aha ka Polyurea Coating a me ka Polyurethane Coatings

ʻO ka Polyurea a me ka Polyurethane Coatings

Ka uhi ʻana o Polyurea

ʻO ka uhi polyurea he ʻōnaehana ʻelua ʻāpana e pili ana i ka Amine i hoʻopau ʻia i ka prepolymer i hoʻopaʻa ʻia me Isocyanate e hana i nā pilina urea. ʻO ka hoʻokuʻi ʻana ma waena o nā polymers reactive e hana ʻia me ka wikiwiki wikiwiki i ka mahana ambient. ʻAʻole pono kēia hopena i kekahi catalyst. No ka mea, aia ke ola o ka ipuhao i loko o kekona; ʻano kūikawā o Plural Pono e hoʻokō i ka hoʻohana ʻana i ka pū puhi mea.

Hiki i nā uhi ke kūkulu i 500 a 1000 microns o ka mānoanoa i hoʻokahi appllication. Ma muli o ia ʻano mānoanoa kiʻekiʻe e hāʻawi maikaʻi ai i ke kemika a me ka pale ʻana i ka abrasion. Eia naʻe, ʻo ka waiwai i makemake ʻia e hilinaʻi nui ʻia i ka hoʻomākaukau ʻana o ka ʻili o ka mea e uhi ʻia. Manaʻo ʻia e hoʻolele i ke one a i ʻole e puhi ʻia ka ʻili e like me ke ʻano maʻamau [e laʻa, Sa 2½, SSPC-SP10/NACE No.2] i kahi metala keʻokeʻo kokoke. ʻOiai ka mānoanoa kiʻekiʻe e hāʻawi mau ana i ka maʻalahi; elongation [ma kahi o 300%] a me ka haʻahaʻa permeability. Hoʻokomo ʻia ka hoʻohana maʻamau ma ke kaʻa i loko o ke kaila wai kahi e kahe ai ka wai kiʻekiʻe me ka wikiwiki a me ke kaomi kiʻekiʻe, ka uhi pahu, ka papahele ʻoihana a me nā ʻano metala like ʻole.

Ka pale Polyurethane

Hāʻawi ka uhi ʻana o Polyurethane i kahi kiʻiʻoniʻoni lahilahi, hoʻopau ʻālohilohi kiʻekiʻe me nā hiʻohiʻona hoʻokō ʻokoʻa. Hoʻohana ʻia kēia uhi i nā mākeke ʻoihana āpau e hāʻawi i kahi hoʻopau paʻa paʻa i ʻoi aku ka maikaʻi o ka pale ʻana i ka corrosion, abrasion, a me ka ʻike kemika. Hoʻohana maʻamau ʻia nā polyurethanes e uhi i ka epoxy kūkulu kiʻekiʻe a me ka zinc inorganic.