Normally
fabrics are knitted with one kind of yarn but in some cases more than
one type of yarn of different counts and combination (mixing of two
different fibres) are used. One very common example is knitting of
fleece fabric, which is knitted by using fine and course yarns, and one
yarn is made of polyester and cotton. Another example is knitting of
fabric by using spandex filament and cotton or pure polyester. In such
condition there is a requirement to mention exact percentage of
different fibres in the fabric. Supplier has to mention this ratio on
label. In this post I will discuss the methods to calculate such
percentage with the help of examples.
Find exact composition of different fibres in fleece fabric from the following data:
Yarn count front 30s 100 cotton
Yarn count for loop 20s 50:50 P/C
Consumption ratio Front: loop 2:1 (by weight)
Suppose for front we need 2Kg yarn and for loop we will be requiring 1 Kg yarn
Front yarn 2 KGS 100 % cotton Cotton 2000 grams
Loop yarn 1 Kg 50:50 P/C Cotton 500 grams and Polyester 500 grams
Exact Ratio
Cotton total 2.5 Kgs
Polyester 0.5 Kgs
Ratio:
Cotton: 83.33%
Polyester : 16.66
No comments:
Post a Comment