| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| Documento principal | 7.96 MB | Adobe PDF |
Advisor(s)
Abstract(s)
A componente ultravioleta da radiação solar, benéfica em pequenas doses, pode ser
nociva pelo efeito acumulativo sobre a pele. Os dermatologistas aconselham à protecção
das quantidades excessivas de radiação UV. Habitualmente pensa-se na protecção da
pele não coberta, mas há que ter em conta a protecção proporcionada pelos tecidos, em
particular o vestuário de Verão.
O objectivo desta dissertação é o estudo da influência das variáveis mais significativas
de que depende o factor de protecção ultravioleta (UPF) dos tecidos. Para tal,
seleccionaram-se tecidos para vestuário de Verão, onde se pôde estudar a influência das
fibras de cupro, acetato, poliéster e linho na protecção UV de tecidos.
Analisa-se também a influência do tratamento com produtos absorventes UV assim
como a influência da aplicação de branqueadores ópticos nos tecidos pré-tratados com
absorventes UV.
Por fim, estuda-se a variação do índice UPF com o tratamento doméstico da peça de
vestuário relativamente à peça de vestuário nova, através da simulação de três lavagens
domésticas com posterior passagem a ferro.
The ultraviolet component of the solar radiation, beneficial in small doses, can be very harmful due to its accumulative effect on the skin. Dermatologists recommend the protection of the skin against excessive amounts of UV radiation. Generally, people think in the protection of the uncovered skin, but the protection provided by fabrics should be also taken into account, particularly in light garments. The objective of this dissertation is the study of the most significant variables, which depends the ultraviolet protection factor (UPF) in fabrics. To that, were selected fabrics used for light garment, where was possible to study the influence of fibres like, cupro, polyester, acetate and linen in the fabrics UV protection. Is also analyzed the influence of treatment made with UV absorber products, as well as the influence of the fluorescent whitening agents in the pre-treated fabrics with UV absorbers. Finally, is studied the variability of UPF with the garment domestic treatment compared with the new garment, through three domestic washes with posterior ironing.
The ultraviolet component of the solar radiation, beneficial in small doses, can be very harmful due to its accumulative effect on the skin. Dermatologists recommend the protection of the skin against excessive amounts of UV radiation. Generally, people think in the protection of the uncovered skin, but the protection provided by fabrics should be also taken into account, particularly in light garments. The objective of this dissertation is the study of the most significant variables, which depends the ultraviolet protection factor (UPF) in fabrics. To that, were selected fabrics used for light garment, where was possible to study the influence of fibres like, cupro, polyester, acetate and linen in the fabrics UV protection. Is also analyzed the influence of treatment made with UV absorber products, as well as the influence of the fluorescent whitening agents in the pre-treated fabrics with UV absorbers. Finally, is studied the variability of UPF with the garment domestic treatment compared with the new garment, through three domestic washes with posterior ironing.
Description
Keywords
Radiação ultravioleta - Pele Radiação ultravioleta - Protecção têxteis - Materiais Materiais Têxteis - Radiação UV - Protecção Vestuário - RadiaçãoUV - Factores externos