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A STUDY ON UV PROTECTION ACTIVITY OF SELECTED HERBS ON BAMBOO/COTTON WOVEN FABRIC
Abstract
The increasing hazard posed by UV radiation due to thinning of the ozone layer forces the textile producers to pay attention to provide textile products with some value-added properties that would guarantee the protection against harmful UV radiation. The UV absorptive efficacy of the ethanolic extract of plants was studied by using SPF analyzer. In this study, Bamboo/Cotton blended woven fabric was used for UV protection finish using herbal extracts, fruit shell of Borassus flebelliter and Phyllode of Opuntia littoralis extracts through soxhlet method and was applied on Bamboo/Cotton fabric by using Dip and dry method. The fruit shell of Borassus flabellate and Phyllode of Opuntia littoralis extract indicates sun protective property above 50 Ultraviolet Protection Factor rating. The fruit shell of Borassus flebelliter and Phyllode of Opuntia littoralis plant extracts showed similar UPF value, providing excellent UV protection when compared to the untreated sample. This type of UV protection finished sample will not only provide protection from environmental hazard but also promotes eco-friendly textiles for UV protection.
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The incidence of skin cancer is increasing by epidemic proportions. Basal cell cancer remains the most common skin neoplasm, and simple excision is generally curative. On the other hand, aggressive local growth and metastasis are common features of malignant melanoma, which accounts for 75% of all deaths associated with skin cancer. The primary cause of skin cancer is long exposure to solar ultraviolet radiation (UV-R) crossed with the amount of skin pigmentation and family genetics. It is believed that in childhood and adolescence, 80% of UV-R gets absorbed while in the remaining, 20 % gets absorbed later in the lifetime. This suggests that proper and early photoprotection may reduce the risk of subsequent occurrence of skin cancer. Reducing the exposure time to sunlight, using sunscreens and protective textiles are the three ways of UV protection. Most people think that all the clothing will protect them, but it does not provide full sun screening properties. Literature sources claim that only 1/3 of the spring and summer collections tested give off proper UV protection. This is very important during the summer months, when UV index is the highest. Fabric UV protection ability highly depends on large number of factors such as type of fiber, fabric surface, construction, porosity, density, moisture content, type and concentration of dyestuff, fluorescent whitening agents, UV-B protective agents (UV absorbers), as well as nanoparticles, if applied. For all of these reasons, in the present paper, the results of UV protecting ability according to AS/NZS 4399:1996 will be discussed to show that standard clothing materials are not always adequate to prevent effect of UV-R to the human skin; and to suggest the possibilities for its improvement for this purpose enhancing light conversion and scattering. Additionally, the discrepancy in UV protection was investigated in distilled water as well as Adriatic Sea water.
The properties of ring-spun yarns made from cotton and regenerated bamboo cellulosic fibres and their blends have been studied. Three blend proportions (100% cotton, 50:50 cotton-bamboo and 100% bamboo) have been used to produce yarns of three different counts (20s, 25s and 30s) and these yarns are then tested for their diameter, tensile, evenness and hairiness related properties. It is found that the yarn diameter reduces as the proportion of bamboo fibre increases. The yarn tenacity first reduces and then increases but the elongation increases continuously as the proportion of bamboo fibre increases. The yarn unevenness is found to be maximum for 50:50 cotton-bamboo yarns. The 100% cotton and 100% bamboo yarns are having comparable unevenness except for 30s count. Hairiness of yarn in different length classes and mean hair length reduce continuously as the percentage of bamboo fibre increases. However, for the same blend proportion, mean hair length is found to be independent on the yarn count. 1 Introduction Blending of different fibres is a very common practice in the spinning industries. The blending is primarily done to enhance the properties of resultant fibre mix and to optimise the cost of the raw material. The properties of blended yarns primarily depend on the properties of the constituent fibres and their compatibility. Moreover, the proportion of fibres in the blend also plays a significant role. It has been observed that the stronger component has to be mixed at least by a certain proportion in order to gain in terms of tensile properties 1. Ratnam et al. 2 developed an expression to predict the strength of the blended yarn spun at optimum twist, in terms of the strengths of yarns spun from the two components at optimum twist. Good agreement between the predicted and the observed values was found over a range of cottons and counts. Zurec
The increased incidence of skin cancer in recent years has resulted in a repeated call for the prevention of UV radiation damage and so investigation on the effects of UV radiation has become more and more important for researchers. In an effort to reduce solar UV radiation exposure, one important method is to use UV-protective textiles. Swimwear fabrics are mostly exposed to sunlight during the summer days, so that it is expected that they provide more UV protection than other textiles. In this study, swimwear fabrics with the same knitting construction and different fiber composition (80% PET+20% /Elastane, 80% PA+20% Elastane) were treated with suitable dyestuffs and UV absorber agents at different concentrations. Then, all the treated swimwear fabrics were tested for UV absorbance (AS/NZS 4399), color fastness to rubbing (EN ISO 105X12), light fastness (TS 1008 EN ISO 105-B02), color fastness to perspiration (acidic and basic-TS EN ISO 105 E04), color fastness to sea water (EN ISO 105 E02), and color fastness to chlorinated water (EN ISO 105 E03) to evaluate the effect of their treatment parameters (such as UV absorber agent, dye concentration) on the UV protection characteristics of the swimwear fabrics.
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Chen.J et al., (2008) "Bio Engineering Informatics, Vol -I, Pp.50.185
Green textile manufacturing
- E Dharani
- S Janani
- P Mythili
- S Shampavibalu
- K Surya
- Kumar
E.Dharani,S.Janani,P.Mythili,Shampavibalu,S.Surya,K.Senthil kumar, "Green textile manufacturing", Colourage, 2011,LVII (3), Pg.no-36
Sustainability in Indigo Dyeing
- . H Mercer
- . M R Tyndall
Mercer,. H and Tyndall,.M.R., (2014)."Sustainability in Indigo Dyeing" -International Dyer, issue 3, Published by WTIN. Est.1881. Pp. 34, 37.
In-vitro evaluation of sun protection factor of a cream formulation prepared from extracts of Musa Accuminata, Psidium Gujava and Pyrus communis
Shahlla Imam, Iqbal Azhar & Zafar Mahmood (2015), "In-vitro evaluation of sun protection factor of a cream formulation prepared from extracts of Musa
Accuminata, Psidium Gujava and Pyrus communis", Asian Journal of Pharmaceutical and clinical research, Vol-8, Issue-3, Pg.no-234-237.