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Luminous materials in their different forms have recently become a fertile area for study and research because of their new benefits and distinctive characteristics. Luminous yarns are one of these materials, which is not only characterized by giving a decorative effect in normal conditions but also a luminous effect in the dark, and also for functional purposes because they have the ability to emit light for a period of time after the light source is turned off or disappeared. These yarns can be used in many textile domains due to the fact that they are safe in contact with the skin, non-radioactive, recyclable and also have good fastness properties in different circumstances. They can also be integrated into fabrics by weaving, embroidery or knitting.
The objective of this research is to study the different properties of the luminous yarn fabrics. Also, making innovative fabric designs by using modern design software which helps in saving time and effort. To achieve this goal, this research includes:
1- Making surface textile designs inspired by the Victorian era using computer programs such as adobe illustrator to produce decorative designs with different motives and choosing the best and most convenient designs from them for producing decorative fabrics after that by jacquard machine. Sixteen designs were made, ten of them were excluded and six were implemented, moreover, the sixth design was produced twice by using different color palettes for each.
2- Using the Jacquard CAD Software to edit the designs which were made by Adobe Illustrator and choosing the best weave structures for them to achieve the desired shades and effects. Furthermore, by using the extra-weft method of weaving, luminous materials were saved from wasting by being integrated in specific parts of the fabric and not in all of it.
3- Studying the different properties of yarns and fabrics such as: their emitting and absorption spectrums, their afterglow behavior after exposing to light and their fastness properties in case of exposing to water, perspiration and light for a relatively long period of time to determine if these yarns are having enough toughness and durability to bear the severe stress which they will pass through during weaving process and during use after applying them in different end uses.
4- Studying the effect of variable textile weaving parameters on the afterglow intensity such as using different textile structures differ in terms of their float size in the fabric surface as well as using two Jacquard machines differ in the yarn density and accumulation of yarns wherefore, five different samples were woven by the jacquard machine, three with different weave structures which are 4, 8 and 16 sateen weaves, as well as two samples with different yarn densities in cm: 15 / 35 where sample number 2 is used twice during the experiment, the five samples are listed below:
1- Sateen 4 weave - 25 yarns/cm
2- Sateen 8 weave - 25 yarns/cm
3- Sateen 16 weave - 25 yarns/cm
4- Sateen 8 weave - 15 yarns/cm
5- Sateen 8 weave - 35 yarns/cm
5- Studying the fastness properties of the luminous yarns towards the repeated exposure to wash, light and perspiration which are unavoidable in case of using the fabrics for making wearable textiles or home-furnishing.
6- Producing different decorative fabrics containing luminous yarns with different characteristics because of using two jacquard machines with different properties which provide the opportunity to produce fabrics with different properties and weights and then employing those fabrics in products such as clothes and furnishing depending on the fabric’s textile design which differ in motives sizes as well as construction method.
The results of the present study can be summarized as follows:
1- Using different textile weaving structures and yarn densities changed significantly in the afterglow intensity of the yarns. Comparing all the experimental fabric samples, it can be noticed that while changing the float sizes to higher lengths the luminosity was clearer and brighter. Furthermore, regarding the density change; the higher the yarn accumulation the higher and brighter the luminosity. The sateen 16 sateen weave and the 35 yarns/cm density sample had the highest significant values compared to the remaining eight samples.
2- The luminous yarn fabrics can be as both decorative and functional fabrics to glow in the dark depending on the desired end use.
3- The survey results show that the fabrics which were used for furnishing were well received better than those fabrics which were used for clothing, in addition to, the fabrics with bigger luminous motives were higher rated than their counterparts.
4- Luminous yarn fabric structure affected the glowing percentage which open doors to further investigations.