Raws li kev sib xyaw ntawm cov pob zeb, dej txo tus neeg sawv cev ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm pob zeb. Cov dej txo tus neeg sawv cev yog cov khoom sib xyaw uas tuaj yeem txo qhov sib xyaw ntawm cov dej siv thaum ua haujlwm ntawm cov cement paste, mortar thiab pob zeb tsis hloov. Impermeability lossis txo cov cement ntau npaum. Qhov piv txwv no muab ib txoj hauv kev siv pov tsegPET yaslos tsim cov dej txo tus neeg sawv cev, tuaj yeem siv cov khoom pov tsegPET yas, txo cov pa phem, txo cov nqi tsim khoom ntawm cov dej txo tus neeg sawv cev.
Tsiaj-raws li cov ntaub ntawv polyester tsis degradable, thiab nws muaj qhov zoo ntawm kev rov ua dua tshiab, tshem tawm qhov xav tau rov qab siv terephthalic acid thiab ethylene glycol rau polymerization. Txawm li cas los xij, cov txheej txheem ua thiab rov ua dua tshiab ntawmCov ntaub ntawv PETtseem yuav tau txhim kho thiab ua kom tiav. Polyester yog cov khoom tseem ceeb rau spunbonded non-woven fabrics, uas tuaj yeem siv rau ntawm 260 ° C rau lub sijhawm ntev. Cov spunbonded thiab kub-dov tsis-woven fabrics ua los ntawm pov tseg PET tuaj yeem txo cov nqi tsim khoom lag luam. Los ntawm kev siv tag nrho cov yam ntxwv ntawm kev rov ua dua tshiabcov ntaub ntawv polyester, Lub zog muaj zog ntawm polyester spunbonded thiab kub dov tsis-woven fabrics yog ntxiv txhim kho los ntawm cov txheej txheem tswj.
Post lub sij hawm: Sep-15-2022