# GATE (TF) Textile 2022 Question Paper Solution | GATE/2022/TF/23

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###### Question 23 (Textile Technology & Fibre Science)

If moisture regain of polyester and cotton is 0.4 % and 8.5 %, respectively, then moisture regain (%) of 70:30 polyester-cotton blend (correct up to 2 decimal places) is ____.

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Given in the question-

Moisture regain of polyster=0.4%

Moisture regain of cotton=8.5%

Then,moisture regain(%) of 70:30 polyster-cotton blend=?

Moisture regain(%) of 70:30 polyster-cotton blend=(70 x moisture regain of polyester+30 x Moisture regain of cotton)/100

Moisture regain(%) of 70:30 polyster-cotton blend=70 x 0.4%+30 x 8.5%/100

Moisture regain(%) of 70:30 polyster-cotton blend=255+28/100

Moisture regain(%) of 70:30 polyster-cotton blend=283/100

Moisture regain(%) of 70:30 polyster-cotton blend=2.83 (Ans)

### What is moisture regain ?

Moisture regain is the amount of moisture absorbed by a material, such as a textile fiber, after it has been dried to a constant weight. Moisture regain is expressed as a percentage of the original weight of the material and is an important factor that can impact the physical properties and performance of a material.

Textile fibers, for example, can absorb and retain moisture, which can change their dimensions, strength, and other properties. The moisture regain of a material can be influenced by various factors, such as temperature, humidity, and atmospheric conditions.

Moisture regain is an important consideration in the selection and processing of textile fibers, as well as in the manufacture of textiles and other products that are made from these fibers. In general, materials with low moisture regain are more stable and less susceptible to changes in dimensional and physical properties when exposed to moisture.