The present study embodies the sewability of single jersey knitted fabric based on needle penetration force and needle cut index. Four types of single jersey fabric, viz. 100% cotton, polyester/cotton, polyester/lycra, and cotton/lycra, are taken for investigation. The materials are prepared on circular knitting machine by varying the yarn count and loop length. The influence of various parameters, viz. type of fibre, yarn count and loop length, on needle penetration force and needle cut index have been analyzed. In addition, the influence of seam direction on the needle cut index is also studied. A 3^_level factorial design is employed to analyse the influence of there parameters. The statistical analysis shows that yarn count and loop length has a significant effect on needle penetration force and needle cut index. It has been observed that in all single jersey knitted fabrics, cotton-lycra and polyester-lycra half plated fabrics have higher value of needle penetration force than cotton and polyester/cotton.  The test results also show that for both coarser yarn and finer yarn count, longer loop length gives a lower value of needle penetration force. The needle cut index decreases with increase in the yarn count and loop length. Also it is observed that, the needle cut index is more in wale direction as compared to that in course direction. It is also concluded that cotton fabric samples are more susceptible to needle damages as compared to their counterparts.

中文翻译：

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支数和线圈长度对单面针织面料中针刺力和针刺指数的影响

本研究体现了基于针刺力和切针指数的单面针织物的可缝纫性。四种类型的单面针织面料，即。进行100％棉，聚酯/棉，聚酯/莱卡和棉/莱卡的调查。这些材料是在圆型针织机上通过改变纱线支数和线圈长度来制备的。各种参数的影响，即。分析了纤维的类型，纱线支数和线圈长度，针刺力和切针指数。另外，还研究了接缝方向对针切指数的影响。A 3 ^_采用水平因子设计来分析那里参数的影响。统计分析表明，纱线支数和线圈长度对针刺力和切针指数有显着影响。已经观察到，在所有单面针织物中，棉-莱卡和聚酯-莱卡半镀层织物的针刺力值高于棉和聚酯/棉。测试结果还显示，对于较粗的纱线和较细的纱线支数，较长的线圈长度会产生较低的针刺力值。针刺指数随纱线支数和线圈长度的增加而降低。还观察到，与纵行方向相比，纵行方向的断针指数更大。