Tensile Orientation Of The Wound Film

Kev taw qhia nyob rau hauv tus txheej txheem ntawm winding zaj duab xis ntau lawm mas tshwm sim nyob rau hauv tus txheej txheem ntawm longitudinal thiab transverse stretching. Tom qab longitudinal stretching, uniaxial longitudinal orientation ntawm lub polymer saw zoo heev txhim kho lub longitudinal mechanical zog ntawm daim ntawv, thaum lub transverse zog yog txo. Tom qab txuas ntxiv rub tawm, cov saw hlau polymer yog biaxially oriented, uas tuaj yeem txhim kho kev ua haujlwm ntawm PE winding zaj duab xis. Txawm li cas los xij, thaum lub sij hawm preheating thiab transverse stretching, lub sij hawm so ntawm molecular saw yog luv vim qhov nce ntawm qhov kub thiab txias, uas yog qhov tsim nyog rau kev daws teeb meem. Ua ke nrog cov nyhuv ntawm transverse tensile quab yuam, longitudinal orientation ntawm molecular saw yuav raug txo mus rau ib qho twg, uas ua rau txo qis ntawm longitudinal thermal shrinkage ntawm zaj duab xis.