Yarn Consumption for a Fabric

sYarn Consumption for a Fabric:
To produce a particular woven fabric of particular fabric specification, yarn consumption can be theoretically calculated. The process of yarn consumption calculation of a particular woven fabric is explained with the help of an example.

Problem:
Calculate the yarn consumption per yard of a woven fabric of specification (20 X 16)/(128 X 60) X 58”, 100% cotton 3/1 twill fabric.

Solution:
The requirement of yarn for the fabric is to be calculated for both warp yarn and weft yarn separately because the warp and weft yarns are of the 20s and 16s respectively. Here, for easy understanding yarn consumption for 100 yards grey fabrics production is done. In the end, yarn consumption per yard of grey fabrics will be converted.

Warp yarn (20s) requirement
= (128 X 58)/1 X 100/1 X 1/(840 X 20) lbs
= 44.19 lbs

Weft yarn (16s) requirement
= (60 X 36 X 100 X 58)/(1 X 36) X 1/(840 X 20) lbs
= 25.89 lbs

Some allowances to be added to the yarn requirements for the following factors:

a. Crimp allowances ………. 10%
b. Yarn wastage ………………. 5%
………………………………………………….
Total …………………………….= 15%

Hence the actual yarn requirements including crimp allowance and yarn wastage allowance will be:

Warp yarn (20s) = 44.19 lbs X 1.15 = 50.82 lbs
Weft yarn (16s) = 25.89 X 1.15 = 29.77 lbs

Now, for each yard of the production of the said fabrics yarn consumption will be –

Warp yarn (20s) = 50.82 / 100 = 0.51 lbs
Weft yarn (16s) = 29.77 / 100 = 0.30 lbs

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