Ntau lawm txheej txheem ntawm waterproof thiab breathable membrane

Kev tsim cov txheej txheem ntawm cov dej tsis muaj dej thiab cov pa ua pa feem ntau yog muab faib ua ob pawg: txoj kev flash evaporation thiab txoj kev ncab. Txoj kev flash evaporation yog ib txoj kev tsim khoom uas tsis yog woven, tseem hu ua cov kuab tshuaj tam sim ntawm lub vev xaib. Nws siv cov tshuab ziab khaub ncaws qhuav es tsis txhob yaj spinning, uas yog tsim los ntawm dissolving cov polymer hauv ib qho hnyav. Cov kua spinning yog ces ejected los ntawm spinneret, thiab cov polymer yog recirculated rau hauv fibers vim ceev evaporation ntawm cov kuab tshuaj. Nyob rau tib lub sijhawm, kev siv tshuab spinning siv nyob rau hauv txoj kev flash evaporation yog txawv los ntawm cov tshuab ziab khaub ncaws. Qhov no yog qhov tseem ceeb hauv qhov tseeb tias cov txheej txheem flash evaporation siv qis dua viscosity ntawm cov tshuaj spinning, thiab siv cov kev kub siab thiab ceev heev los tig lub spinneret. Squirting tawm ntawm lub qhov. Vim qhov tsis muaj viscosity thiab fluidity zoo ntawm cov tshuaj, cov kua filaments solidify thaum lub sij hawm high-ceev txav mus rau ib tug heev zoo fiber filaments, uas yog thaum kawg adsorbed rau ntawm lub mesh curtains ncaj qha tsim fiber ntau mesh. Cov polyethylene non-woven fiber uas tsim los ntawm txoj kev no tuaj yeem ua nyias li 0.1 dtex (1 dtex=0.1 mg/m). Yog li ntawd, nws muaj cov dej tsis zoo thiab ua tsis taus pa thiab tuaj yeem cais ntau cov kua dej thiab cov khoom qhuav thiab ntub dej. Kev tso rau hauv dej tsis cuam tshuam rau nws lub cev, thiab tib lub sijhawm tso cai rau huab cua txaus thiab dej vapor nkag mus rau hauv; fiber ntau muaj crystallinity siab, zoo orientation, thiab nruam fibers, yog li daim ntawv muaj lub zog zoo heev, tsim kua muag, thiab puncture kuj. , Lub zog tawg yog 2-3 lub sij hawm ntawm polypropylene non-woven fabrics; vim tias txoj kev electrostatic tuaj yeem khaws cov fibers nyob rau hauv ib lub xeev, qhov kev ntxhib los mos ntawm daim ntawv yog heev uniform.