纯棉股线定形工艺优选

Pure Cotton Ply Shaping Process Optimization

优选纯棉股线定形工艺参数。以缝纫线为例,选择热定形温度、保温时间、捻系数比和预调回潮率等影响定形效果和定形后股线质量的因素,通过单因素试验和正交试验分析对比了不同定形工艺下股线的回捻数和断裂强力。结果表明:当定形温度90℃、保温时间35min、捻系数比1.6、预调湿回潮率20%时,股线断裂强力下降小,满足了用户对强力的要求,同时股线的回捻数最小,外观无明显变色现象。认为:工艺参数的优选要同时兼顾生产效率和产品质量。

Pure cotton ply shaping process parameters were optimized.Sewing thread was taken as an example,factors such as heat setting temperature,holding time,twist factor ratio and preset moisture regaining were selected to influence the shaping effect and the quality of ply after shaping.Twist run back and breaking strength with different process configurations were compared by single factor test and orthogonal test analysis.The result showed that when the setting temperature 90 ℃,thermal insulation time 35 min,twist factor ratio 1.6 and preset moisture regaining 20%,breaking strength of ply was decreased which satisfied the user′s requirement for strength.Twist run back was the smallest at the same time.There was no obvious discoloration in appearance.It is considered that optimization of process parameters must take into account both production efficiency and product quality.