De hurdens fan glês is heul heech, as it gebrûk net maklik is om te krassen en te krassen, is de algemiene natriumkalciumglês vickers hurdens (HV) 400 ~ 480MPa, en de hurdens fan plestik binne relatyf leech, maklik te krassen, lykas polyvinylchloride (PVC) HV is 10~15MPa, thermoset polyester (PET) is 10~21MPa, polyetyleen (PE) is 5~8MPa, polypropyleen (PP) is 6~11MPa.
Posttiid: Jan-10-2020