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= αmsqrt(Nm)

Descriptions                                                                   Transformation of values

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

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

am        : 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

 

Arama

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