Fabric manufacturing needs a full proof calculation to make a better profit. Every production manager always does calculation to reduce the wastage and make larger profit. Calculation can help to make a cheaper deal with buyer as no one able to do. In this following article I’m going to show you some critical calculation formula which is important to know every textile professional, textile engineer, Professor even a textile student.
Calculation of fabric manufacturing
Technical Formula
Motor pulley diameter
Loom speed = Motor RPM x ——————————-
Loom pulley diameter
Actual production
Loom Efficiency % = ——————————-x 100
Calculated production
Yarn weight – Dried yarn weight
Moisture Regain % = ——————————————— x 100
Dried yarn weight
Yarn weight – dried yarn weight
Moisture Content % = ———————————————— x 100
Yarn weight
Total ends x Tape length in meter
Warp weight in Kg. = ——————————————————
1693.6 x Warp count
RS in centimeters x Cloth length in meters x PPI
Weft weight in Kg. = ——————————————————————
4301.14 x Weft count
EPI PPI
Cloth weight in GSM = —————– + —————– x 25.6
Warp count Weft count
GSM (Grams per sq. meter)
Oz (Ounce) per sq. yard = ——————————————
34
Mathematical formula
Total wt. of size on warp = wt. of sized warp – wt. of upsized warp.
The wt. of size to be put on warp = wt. of upsized warp x % of size reqd to be put on warp.
Length of warp in yds
the wt. of upsized warp = ——————————- x no. of ends + wt. of size.
840 x count
Wt. of size
Wt. of sized warp = —————————— x 100%
Wt. of upsized warp
Wt. of size
% of size on warp = —————————– x 100%
Wt. of upsized warp
length of warp in yds
Count of sized yarn = ——————————————- x no. of ends
840 x wt. of sized warp (in lbs)
100
Count of sized yarn = count of upsized yarn x ———————– 100 + % of size
