Calculation of Fabric Production

Fabric production is the ultimate goal in weaving and knitting. For increasing productivity, the production manager has to apply different formula. In this article, I have given a few formulas of calculation of fabric production which will be helpful for fabric manufacturing students and professionals.

Calculation of Fabric Production
Fig: Fabric Production Section

Calculation of Fabric Production:

……………………………………………..Motor pulley diameter
1. Loom speed = Motor RPM x ————————————–
……………………………………………..Loom pulley diameter

…………………………………………Actual production
2. Loom Efficiency %age = ———————————– x 100
……………………………………..Calculated production

…………………………………….Yarn weight – Dryed yarn weight
3. Moisture Regain %age = ————————————————– x 100
……………………………………………….Dryed yarn weight

You may like: Standard Moisture Regain and Moisture Content of Fibers

………………………………………Yarn weight – dried yarn weight
4. Moisture Content %age = ———————————————— x 100
……………………………………………………..Yarn weight

…………………………………..Total ends x Tape length in metre
5. Warp weight in Kg. = ——————————————————
…………………………………………….1693.6 x Warp count

……………………………………RS in centimetres x Coth length in metres x PPI
6. Weft weight in Kg. = ———————————————————————————
…………………………………………………………4301.14 x Weft count

…………………………………………EPI                 PPI
7. Cloth weight in GSM = —————– + —————– x 25.6
…………………………………..Warp count     Weft count

………………………………………..GSM (Grams per sq. metre)
8. Oz (Ounce) per sq.yard = ———————————————-
…………………………………………………………34

Material measurement :
For calculating of length of any rolled fabrics :

……..0.0655 (D – d) (D + d)
L = ————————————-
……………………….T

Where,

L = Length of material (feet)
t = Thickness of fabrics (inches)
D = Outside diameter (inches)
d = Inside diameter (inches)

Weight of yarn in a cloth:
The weight of cloth manufactured on the loom depends upon the weight of yarns in the warp and weft: ends/inch, picks/inch and the weight of size on the warp.

Therefore, Cloth weight = Weight of warp + Weight of weft + Weight of size (All in lbs.)

…………………………………………………..Total No. of Ends x Tape length in yds.
Where as Weight of warp in lbs = ——————————————————————
………………………………………………………………840 x Warp yarn count

Also Weight of weft in-lbs. =

…..Length of cloth (yds) x Picks/inch in cloth x Reed width (inch)
= —————————————————————————————————-
……………………………….840 x Weft yarn count

Author of this Article:
Rofiquzzaman Raju
Fabric Technologist,
B.J.Group, Mawna, Gazipur
Email: rtextile.finance@gmail.com

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