Nylon caster yog cov khoom lag luam tseem ceeb ntawm cov khoom abrasives, thiab nws yog cov khoom abrasive tom qab muaj zog txiav thiab abrasive khoom xws li abrasive siv lub log. Lub caster ua los ntawm cov khoom siv polyurethane yog softer, thiab lub zog yog qis dua li cov nylon caster, tab sis lub suab nrov txo cov nyhuv yuav zoo dua, thiab kev muaj peev xwm yuav siab.

1. Cov khoom siv ntawm ob qhov sib txawv. Polyurethane log yog mos, nrog kev sib txhuam zoo thiab tsis muaj suab nrov; thaum nylon log yog qhov nyuaj, thiab lawv cov kev sib txhuam tsis sib haum yog me ntsis txawv ntawm polyurethane. Piv txwv li, fabrics ua los ntawm nylon kuj hnav-resistant.

2. Cov ntaub ntawv ntawm polyurethane log thiab nylon log yog txawv. Polyurethanes yog tsim los ntawm polymerizing isocyanates (monomers) nrog hydroxyl compounds. Vim muaj zog polar urethane pawg, nws yog insoluble nyob rau hauv non-polar pawg thiab muaj zoo roj kuj, toughness, abrasion kuj, laus kuj thiab adhesion. Cov ntaub ntawv tsim nyog rau ntau qhov kub thiab txias (-50-150 degree) tuaj yeem npaj nrog cov ntaub ntawv sib txawv, suav nrog elastomers, thermoplastic resins thiab thermosetting resins. Tsis resistant rau hydrolysis ntawm qhov kub thiab txias, los yog resistant rau alkaline xov xwm.