Vim li cas cov npas ntab saum dej?
Tswb Pob tsim cov khoom thiab Hollow PP Yas pob ntab rau hauv dej, vim tias cov khoom ntom ntom 0.9g / cm3, nws yog sib dua li dej.
Dab tsi yog daim ntawv thov ntawm hollow yas npas?
Polypropylene Hollow yas npas yog siv cov ntsiab lus asfloating, lawv pab kom txo tau cov evaporation ntawm cov kua thiab emission ntawm unwanted chav. Lawv kuj tau nquag siv txawm tias yog cov khoom siv kho kom zoo nkauj, tshuaj pleev ib ce rollon, ntau yam kev kho mob thiab kev ntim khoom siv.
