Anti UV treatment of textiles

Prepared by Rajib Chandra Gosh

The electromagnetic spectrum

Why UV protection’s necessary

Ultraviolet protection factor

Classification UPF Approximate % UV blocked

Good UV protection 15-24 93.3%-95.8%

Very good UV protection 25-39 96%-97.4%

Excellent UV protection 40-50 97.5%-98%

Textile’s UV protection performance is determined by ultraviolet protection factor

Fabric performance according to UPF

• Cotton / polyester has higher UPF• Woven fabrics has higher UPF than knitted

fabrics• Cotton / polyester blended fabrics has higher

UPF

Factors of UV protection

Methods of UV protection in textiles

1. Nano finishes2. UV absorbers3. Colors

Nano finishes

Procedure for Nano finishes

Pretreatment

Dyeing

After treatment

In after treatment nano finishes at 100° c for 2.5 hrs

UV absorbers

By using gamma radiation to develop UV protection factor into textiles

Procedure of UV absorber

• At first cut the cotton fabrics into small 50*50cm

• Then it is washed by 5gm/l soap at 90c for 20 min

• Then applied Nano particles zno into both sides of fabrics

• Then again washed by soap 4gm/l and dried horizontally .

Colors performance

• Black ,navy, deep red resists UV a little .• Direct, reactive and vat dyes has UV

protection properties• Optical brightening agents enhances

brightness by UV emission and excitement

Thank you for your attention