Technical Documents

Technical Documents

General Sewing Information
Stitch Code Number	Number of Yarn	Number of Needles	Stitch Type
101	1	1	single needle chain stitch
301	2	1	Lock Stitch
304	2	1	Lock Stitch zig-zag
401	2	1	Two thread chain stitch
404	2	1	Two thread chain stitch zig-zag
504	3	1	three thread overlock
512	4	2	Four thread safety stitched overlock
514	4	2	Four thread overlock
515	4	2	Four thread chain safety stitched overlock
516	5	2	Five thread chain safety stitched overlock
606	9	4	Four needle Fletlok

 

Yarn Twisting

Twisting a fiber is important in terms of the strength conditions of the process it will use. The number of twists in a yarn determines strength, elasticity, etc. It affects yarn properties such as A thread can be twisted in two directions. Twist is indicated by the letters “Z” and “S”. Twist calculation according to Köchlin;

T: twist

T/m: number of turns per meter

α : Twist coefficient

Formula for Tex:  T/m = αtex/sqrt(tex)

Formula for Nec : T/inch= αsqrt(Ne)

Formula for Nec: T/m= α_msqrt(Nm)

Descriptions                                                                   Transformation of values

a_tex       : twist coefficient in Tex unit                                  T/inç=T/m0.0254

a_e        : Twist coefficient in British system                        T/m = T/inç39.97

a_m        : twist coefficient in the metric system

T/inç    :turns per inch

T/m     : number of turns per meter

 

Yarn Count Conversion Formulas

	tex	dtex	den	Nm	Nec
Tex		Dtex/10	den/9	1000/Nm	590.54/Nec
dtex	10 x Tex		den/0.9	1000/Nm	5905.4/Nec
den	9 x Tex	0.9 x dtex		9000/Nm	5314.9/Nec
Nm	1000/tex	10000/dtex	9000/den		Nec x 1.6934
Nec	590.54/tex	5905.4/dtex	5314.9/den	Nm x 0.5905