Dab tsi yog cov yam ntxwv ntawm kub yaj nplaum zaj duab xis

Kub yaj nplaum zaj duab xis muaj ib tug tej yam degree ntawm waterproof permeability tom qab sib txuas. Txawm tias tsis-ntxuav EVA kub yaj nplaum zaj duab xis muaj qee yam ntxwv ntawm qhov no. Qhov no yog vim hais tias cov qauv ntawm cov kub yaj nplaum zaj duab xis yog nyias-film-zoo li. Thaum nws melts ntawm qhov kub siab, cov nplaum molecules yuav tsis nkag mus tob rau hauv cov khoom sib txuas. Tshwj tsis yog tias qhov ntsuas kub uas koj siv siab dhau lawm lossis lub sijhawm nias ntev dhau lawm, cov nplaum nplaum yuav ua lub luag haujlwm sib txuas hauv nruab nrab txheej. Nyob rau lub sijhawm no, thaum cov dej molecules nkag mus rau cov khoom siv sab saud thiab nkag mus rau hauv nruab nrab cov nplaum txheej, cov nplaum nplaum yuav thaiv cov dej molecules thiab tiv thaiv lawv los ntawm kev nkag mus rau qee yam. Lub thicker lub kub yaj nplaum zaj duab xis, qhov ntau pom tseeb cov nyhuv hauv qhov no.

Qhov thib ob tus yam ntxwv ntawm kub yaj nplaum zaj duab xis yog qhov kev xav ntawm kub yaj nplaum zaj duab xis tom qab kev sib txuas yog ib qho nyuaj tshaj li qhov kub yaj nplaum nplaum lub vev xaib. Qhov no tsis yooj yim to taub. Ntxiv rau qhov feem ntau cov nplaum nplaum ntau dua ib square meter ntawm cov nplaum zaj duab xis, cov qauv ntawm cov yeeb yaj kiab kuj ua rau lub siab tawv tom qab sib txuas. Ntxiv nrog rau qhov tuab, qhov kev xav kuj tseem cuam tshuam nrog kev muaj pes tsawg leeg. Yog hais tias koj xav tau ib tug softer, koj yuav tsum xaiv ib tug nyias nplaum zaj duab xis nrog elastic thiab mos Cheebtsam.

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