engleski

Sunprotected White Cotton Knitted Fabrics

In addition to one of the beneficial effects of UV radiation on skin by synthesizing of vitamin D3, this radiation is the main reason for increasing the skin cancer rates, particularly in some countries. It is the consequence of sunburns of the skin and damages of underlying cells accumulated year after year until cancer cells were produced. Summer garments provide some protection but in most cases there are not enough sun screening properties to sunlight. When light meets the fabric or another porous surface, some of it is reflected, some absorbed and some is transmitted. To prevent harmful UV rays transition, fabrics are treated with UV absorbers. The paper will discuss the results obtained on bleached cotton knitted fabrics treated with TINOFAST CEL Liquid (Ciba) on the chemical basis of oxal anilide. For this purpose light cotton knitted fabrics were differently pretreated and finally treated with an UV absorber. It is well known that the fabrics treated in wet conditions like water and alkaline conditions (in scouring and bleaching) undergo some structural changes reflected in lower porosity properties. It was of interest to study the influence of differently treated fabrics on the ultraviolet protection factor (UPF) of light summer fabrics that generally offer poor protection against UV radiation. Additionally, the fabric was treated with fluorescent whitening agents (FWA) to study the influence of these agents on UV protection properties of fabric. For this purpose cotton knitted fabric was scoured, bleached and treated with UV absorber. The influence of pretreatments and structural changes on UV protection was studied.

cotton knitted fabrics; cotton cationisation; UV absorber; UPF

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