Have you heard of non-iron shirts? Ever wondered how are they manufactured? Find out the answer in my new article.

2. • Cotton is suitable for apparel purpose because of its durability,
good absorbency and ability to take up a wide range of
dyestuffs.
• However, during actual wear, cotton garments are prone to
crease under slight crushing, and the crease is retained for a
long time.
Why is cotton used for your shirts?

3. Why cotton creases?
• The crystalline polymer system of cotton makes it relatively inelastic.
Bending and crushing of cotton textile materials places considerable
strain on its polymer system. This causes cotton textiles to wrinkle
and crease readily.
• Under stress, the hydrogen bonds between adjacent cellulose chains
can break allowing the chains to slip past each other. The stressed
shape of the fiber is just as stable now as was the original shape.

4. What are resins? How do they work?
• Resins are cross-linking agents, which react
with the OH groups of cellulosic materials in
acidic medium at a pH of 3-4 to form covalent
bonds. They are commonly used to make
cellulosic fabric (cotton and cotton blends)
wrinkle resistant.
• Resins work by the reaction of nitrogen atoms
of each resin molecule with the hydroxyl
group of the cotton fabric. The reaction forms
a linkage between the resin and the cotton
fibers giving the cotton unshrink pattern in
which shape is being made & cured.

5. Types of Resins
• Resins mainly fall into two groups:
1. Deposition type of resins
2. Cross linking type of resins
• Deposition type of resins:
These resins are deposited on the fabric as surface coating. No reaction will take place between the fiber and resin.
• They include:
1. Phenol-Formaldehyde resins
2. Urea formaldehyde resin
3. Alkyd resins
4. Ketone resins
5. Vinyl resins

6. Advantages of Resin finishing:
• It improves the Crease Resistance and Crease Recovery property
• It reduces the shrinkage during laundering
• It gives a smooth and quick drying property
• It improves Resilience, Handle and Draping quality
• It improves the weight and Dimensional stability
• It gives resistance to degradation by light and laundering
• It improves the fastness to Light and Washing of many dyestuffs

7. Disadvantages of resin finishing:
• Environmental effect – release of free formaldehyde
• It decreases the Tensile strength and Tear strength
• It decreases the Abrasion resistance
• It gives an unpleasant odour
• It gives harsh and stiff feel

8. To know more about this topic, check out the article on
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