The hardness of glass is very high, when the use is not easy to scratch and scratch the general sodium calcium glass vickers hardness (HV) is 400~480MPa, and the hardness of plastic are relatively low, easy to scratch, such as polyvinyl chloride (PVC) HV is 10~15MPa, thermosetting polyester (PET) is 10~21MPa, polyethylene (PE) is 5~8MPa, polypropylene (PP) is 6~11MPa.
Post time: Jan-10-2020