Lub hardness ntawm iav yog siab heev, thaum siv tsis yooj yim rau khawb thiab khawb qhov dav dav sodium calcium iav vickers hardness (HV) yog 400 ~ 480MPa, thiab cov tawv tawv ntawm cov yas yog qhov tsawg, yooj yim rau khawb, xws li polyvinyl chloride. (PVC) HV yog 10 ~ 15MPa, thermosetting polyester (PET) yog 10 ~ 21MPa, polyethylene (PE) yog 5 ~ 8MPa, polypropylene (PP) yog 6 ~ 11MPa.
Post lub sij hawm: Jan-10-2020