The Study of Mechanical Properties for ABS Regrind Materials

• Main Authors: Min-Long Lin, 林敏龍
• Other Authors: 韓麗龍
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/5f4u5m

碩士 === 國立臺北科技大學 === 製造科技研究所 === 98 === The concerns of environment will be taken notice today. The reclaim of plastic is also paid attention gradually. Regrind material added to the virgin plastic material is considerable for the plastic parts. The greatest effects on the mechanical properties are the proportion of the regrind material. In this study, regrind material is added to ABS and kneaded for the test material. The specification of tensile test is ASTM D638, impact test is ASTM D256, melt flow index test is ASTM D1238. The tensile test specimen was prepared by single and double gate with three types of thickness 1, 2, and 3 mm, respectively. Tensile test results show that the more the proportion of regrind material added, the lower the tensile strength obtain. When the regrind material was added from 0% to 100%, the tensile strength of 1, 2, and 3 mm thickness (single gate) decrease to 13%, 10.11%, and 4.92%; for double gate specimen, tensile strength decrease to 19.26%, 13.82%, and 6.50%, respectively. Impact test results also show the impact strength is 25.27% of decline (single gate); for double gate of impact specimen, the strength is 32.40% of decline. When the regrind material added to the virgin plastic, mechanical strength reduction is due to its molecular chains in the screw were cut short during molding process. The shorter of the molecular length, the weaker bonding strength is between the molecular chains.