Cov txheej txheem txhais ntawm cov khoom siv roj hmab

Lub qhov hws ntawm cov khoom porous no yuav tsum yog thoob plaws hauv tag nrho cov khoom. Raws li cov qauv sib txawv ntawm qhov pores, nws tuaj yeem muab faib ua cov pores kaw (qhov pores tsis txuas nrog ib leeg), thiab qhib qhov pores (qhov pores tsis sib cais tag nrho los ntawm phab ntsa pore). , nrog rau qee qhov kev sib koom ua ke) thiab cov pores sib xyaw (ob qho tib si qhib-pore thiab kaw-pore qauv). Raws li, microporous roj hmab feem ntau suav nrog ob hom roj hmab nthuav dav thiab daim txhuam cev roj hmab. Vim muaj kev siv sib txawv, lub ntsiab lus ntawm "sponge rubber" hauv cov ntaub ntawv tshawb fawb hauv tsev tsis paub qhov txawv ntawm qhov qhib thiab kaw cov txheej txheem ntawm cov hlwb.