Wavy splint zipper is one of important criteria in checking jacket product quality when manufacturing in industrial process. Determining the optimal technological parameters to minimize the wave buckle brace phenomenon. We have studied a number of factors affecting the wavy splint zipperphenomenon. The study was conducted according to the method of multivariate orthogonal experimental planning with the help of Design Expert 11.0 software to design the experiments, process data and establish the experimental regression equations. Determined the effects of 4 elements at the same time: the length of shirt, stitch length, compression presser foot, the height of tooth, compression presser foot, the height of tooth bar to wave brace height. The research’s result showed that the splints shirt length has the most effect on the height of wave buckle brace. Applying the optimization model the research has identified that the quadratic model has the statistical significant. The research’s results have indentified the optimal machining technology to reduce the level of the splint wave: brace strip = 553.467mm ( converted to the ratio between the length of the fabric and the buckle is 100.63%) stitch length = 3.453mm, presser foot compression = 28.535mm, tooth bar height = 0.978mm.

Keyword: jacket, wavy splint zipper, optimal.