Ib txwm sib piv ntawm cov pawm

Tsuas yog muab piv nrog cov pawm thiab cov pawm ib txwm muaj, nyob rau hauv cov nqe lus ntawm huab cua permeability, ntawm chav kawm, cov ntaub qhwv ib txwm zoo, thiab zoo dua, vim nws tsuas muaj ntaub thiab tsis muaj cov khoom siv dej. Tab sis nws tsis ncaj ncees heev los txiav txim qhov zoo ntawm ob qho tib si los ntawm kev sib piv. Vim hais tias nyob rau hauv cov ntaub qhwv ib txwm, tib neeg feem ntau siv cov txheej txheem dej rwb thaiv tsev rau sab nraud ntawm daim pawm: cov ntawv yas uas tsis yog breathable kiag li. Yog li peb yuav tsum sib piv cov ntaub qhwv ib txwm siv nrog "tag nrho" daim pawm uas tsis muaj cua permeability txhua. Cov ntaub qhwv nrog cov ntaub tsis-woven, lined nrog tsuas yog cia cua hauv thiab tawm tab sis tsis txhob cia cov dej molecules hauv thiab tawm ntawm cov khoom, yog li txawm hais tias huab cua permeability tsis tuaj yeem muab piv nrog cov ntaub ntshiab, tab sis piv rau "tag nrho version" ntawm cov tsoos. cov pawm, cov pa permeability tuaj yeem ua tau zoo dua.
Nrog rau kev txhim kho tas mus li ntawm cov txheej txheem tsim khoom, cov ntaub qhwv tau raug txhim kho los ntawm qhov qub kev ua haujlwm ntawm kev tiv thaiv thiab nqus cov zis rau ob qho tib si tiv thaiv thiab tso pa tawm thiab tso zis nqus thiab tshuaj tua kab mob, thiab tau nce lub duav elastic duav, peb-dimensional to. -pov thawj muab faib thiab lwm yam haujlwm.