Demoulding Principple of Polyurethane Release Agent Thaum lub sij hawm PU Tyre Production
PU (polyurethane) pwm tso tawm tus neeg sawv cev, qhov adhesion ntawm polyurethane thiab pwm nto feem ntau suav hais tias yog vim li cas ob qho tib si. Ua ntej, qhov saum npoo ntawm pu log pwm feem ntau yog them los ntawm ib qho nyias nyias lossis txawm tias monomolecular txheej ntawm dej zaj duab xis. Cov yeeb yaj kiab dej no nyias nyias ua haujlwm nrog isocyanate los ua kom muaj zog adhesion. Qhov thib ob, qhov adhesion yog tsim los ntawm sab hauv ntawm lub log tsheb pwm. Nws yog tshwm sim los ntawm cov tshuaj tiv thaiv tsim los ntawm cov tshuaj tiv thaiv ntawm pawg polar ntawm polyurethane thiab pawg polar ntawm polyurea. Txhawm rau tso cov khoom lag luam zoo, cov yeeb yaj kiab du thiab du uas tsis tau hnov nrog cov ntaub ntawv raw thiab muaj qee yam advesion rau cov pwm, thiab tib lub sijhawm muaj ib qho yooj yim. Cov khoom siv demoulding zoo (feem ntau yog cov khoom siv tsis zoo) yog txau sib npaug ntawm cov pwm los ntawm qhov nruab nrab (dej), thiab cov yeeb yaj kiab du yog tsim tom qab qhov nruab nrab (dej) volatilizes, thiaj li muaj cov nyhuv demoulding.
