The Bending Strength and Hardness of Recycle Plastic Type HDPE High Density Polyethylene and PP Polypropylene

Abstract

The purpose of this research is to know the strength, flexibility and maximum hardness of plastic waste after pressing of HDPE, PET/PETE and PP type with bending test. Furthermore, the specimen is made referring to ASTM 6272 D and the testing is carried out with the specified measurement. The results show that the strongest recycled plastic with the highest bending level is obtained from the composition of 50% HDPE, 20% PET/PETE and 30% PP, with maximum power of 52.9 N/mm2 and 137.74 Kg/mm2 . In addition, the biggest flexibility strength is plastic with composition 50% HDPE, 20% PET/PETE and 30% PP with strength value of 9.53 N/mm2 . As for hardness value, it reaches 12.76 Kg/mm2 . Because the plastic in used is recycled Plastic, the resulting product cannot be used for food and beverage container. However, it can be used for flower pot and pencil case.