Moisture Absorption of Fibres

1. Introduction

Most of the fibres are hydroscopic and hydrophobic in nature,moisture absorbency divided whether the fabric is suitable for particular puspose.

  1. Moisture Regain
  2. Moisture Content
1. 1 Moisture Regain

It  is defined as weight of water in a material expressed as a percentage of oven dry weight.
It is denoted by R.                                                                         
R=W/D*100 Where,W=Weight of water and D=Oven dry weight

1.2 Moisture Content

It is defined as the weight of water in a material expressed as a percentage of total weight.
It is denoted by M.                                                                       
M=W/(W+D)*100                                                             Where,W=Weight of water and D=Oven dry weight  

       

2. Relationship between Moisture Regain and Moisture Content

M=R/(1+R/100)

Where : M= Moisture Content, R= Moisture Regain

MR and MC values of various fibres:

FibreM.C.%M.R.%
Cotton7.348.5
Silk9.9111
Wool13.811
Viscose9.9111
Nylon3.14.5
PET00.4
Acetate06.0
Acrylic01.5
Flax10.412.4
Hemp10.412.4

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