Kev xaiv ntawm cov iav fiber ntau mesh daim ntaub feem ntau yog nyob ntawm peb yam, thawj yog alkali tsis kam ntawm iav fiber mesh daim ntaub, qhov thib ob yog seb cov iav fiber ntau mesh daim ntaub muaj zog stretch, thiab tom qab ntawd cov iav fiber ntau mesh daim ntaub yuav tawg. thaum nws undergoes ib qho degree ntawm tensile quab yuam. Txawm li cas los xij, thawj ntawm peb lub ntsiab lus no yog alkali tsis kam, thiab kev txiav txim siab seb lub iav fiber ntau daim ntaub puas tsim nyog kuj yog qhov taw qhia tseem ceeb.
