Abstract
Effective textiles are a part of technical textiles that are defined as comprising all those textile-based products that are used principally for their performance or functional characteristics rather than their aesthetic or decorative characteristics. protective clothing is specially designed for sun protection and generally produced from the fabric rated for its level of ultraviolet (UV) protection. Ultraviolet rays constitute a very low fraction of the solar spectrum but influence all leaving organism. The sun is the principal source of UV exposure for most people. Exposure to the sun is known to be associated with various skin diseases, skin cancers, accelerated skin aging and other eye diseases, and probably has an adverse effect on persons ability to resist infectious diseases. The rating system of fabric specifies an ultraviolet protection factor (UPF) value, which can be thought as a time factor for the protection of Caucasian skin compared to exposure without exposure without any protection from sun's UV as a means of protecting skin from damage. The shorter the wavelength, the higher the energy of radiation.UVA rays account for 90 to 95% of UV radiation that reaches the earth. While UVB makes only 5 to 10% of solar radiation, its high-energy damages surface epidermal layers and cause sunburn.UVB is strongest particularly between 10 AM to 4 pm from April to October and UVA present equally throughout daylight hours and throughout seasons both types of UV rays can cause skin cancer because they damage skin cells and alter their DNA, and also causes premature aging of the skin. A novel weave structure and denier (related to thread count per inch) may provide the sun protective properties. nowadays textiles and fabrics used for sun protective clothing are pre-treated with chemically modified UV- inhibiting ingredients during manufacturing to enhance their effectiveness, here in this paper author tried to use some environment-friendly natural ingredients as an alternative to chemically modified UV-inhibiting ingredients. All-natural ingredients from herbs like green tea leaf, pudina, and neem leaf extracts are used and experimental findings related to UPF(Ultraviolet protection factor) are discussed.
Highlights
The problem that humans dealing with harmful UV radiation is not unknown to the world, Incidence of skin cancer increasing since last few dacades
Various factors affect the ability of fabrics to provide enough protection from ultraviolet radiation (UVR) such as Chemical composition, fabric construction, textile auxiliaries, colour and finishing processes etc, most of the times dyes used provide good resistance against the ultraviolet light transmittance, and the protection level generally increases with the increase in dye concentration, Light colours reflect solar radiation more effectively than the dark ones allowing incident radiation to penetrate the fabric supported by reflecting actions(scattering).[5]
All the relevant result related to treated and untreated samples with three different extract are summarized in table 3 to have better comparison and analysis, when the sample 1,2 and 3 are compared on the basis of three different extract treatment,sample 1 has shown incremental behavior when treated with extracts of Pudina, Neem and green tea leaf as far as the ultraviolet protection factor (UPF) value is concerned, the same trend is not continued in the values of UVA% and UVB% when sample treated with neem extract and there is no significant difference observed between treated and untreated sample
Summary
The problem that humans dealing with harmful UV radiation is not unknown to the world , Incidence of skin cancer increasing since last few dacades. The major cause of skin cancer is known to be a long exposure to solar ultraviolet (UV) radiation. The solar ultraviolet radiation of importance to human health consists of UVA and UVB, there fore the main UV radiation that should be blocked by textiles are UV-A and UV-B. Various factors affect the ability of fabrics to provide enough protection from ultraviolet radiation (UVR) such as Chemical composition, fabric construction, textile auxiliaries, colour and finishing processes etc, most of the times dyes used provide good resistance against the ultraviolet light transmittance , and the protection level generally increases with the increase in dye concentration, Light colours reflect solar radiation more effectively than the dark ones allowing incident radiation to penetrate the fabric supported by reflecting actions(scattering).[5]. UV light at 280nm is 1000 times more damaging than light at 340 nm so a fabric ability to block UV-B is the most important factor in preventing the negative side effects of sun exposure. [7]
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