Study on the Properties of Water Absorption and the Process Standardization of NYLON 6/66 Buckle Product

• Main Authors: Wen-Ching Chiang, 江文境
• Other Authors: Chun-Ming Liu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/78725941776745581548

碩士 === 龍華科技大學 === 工程技術研究所 === 100 === Nylon 6 and Nylon 66 are widely used in different kind of buckles, recently. However, the tensile stress of the Nylon 6 or Nylon 66 made buckles becomes unstable, due to the water absorption characteristics are varied under different environments. To make the tensile stress of the buckles becomes stable, this study made a standard of water absorption percentage for the manufacturing and quality control. Furthermore, we found that the water absorption time and the thickness of buckles were two main parameters for the water absorption percentage of buckles. In this study, three procedures were used to make a water absorption standard of buckle manufacturing： 1. Determine the water absorption percentage for different thickness. The water absorption percentage of 1 mm, 2 mm, and 3 mm thick Nylon 6 and Nylon 66 samples in the atmosphere at normal temperature environmentand in the 90℃hot water will be compared and evaluated to make this standard. 2. Determine the water absorption time and water absorption percentage for different buckle products. Calculate the average thickness of the buckle. Then choose the water absorption percentage and water absorption time for that buckle product based on the previous results. 3. Standardize the tensile stress strength of that buckle. Tensile stress tests for 32 buckles with the water absorption time which was made as the previous procedure were analyzed for manufacturing capability. Regulate the tensile stress strength of the buckle by the manufacturing capability analysis. The results show that after the standard of water absorption was made for manufacturing buckles, the tensile stress of the Nylon 6 and Nylon 66 made buckles becomes stable and the manufacturing capability Cpk value reaches to 1.5.