iosr-jpte   Volume-1 ~ Issue-4 ~ sep. – Oct. 2014

Abstract: The printed fabrics were subjected to ISO2, ISO3, and ISO4 wash fastness test and assessed for change in colour and staining using the grey scale. The change in colour of the tested specimen and the staining of the adjacent undyed cloths were assessed with the appropriate grey scales. The fabrics were also tested for light fastness property. The specimen and the blue standard were exposed behind a glass and inserted into the light fastness testing machine. Exposure was carried out for 48 hours. Based on the research carried out, it was found that the selected foreign fabrics show a higher wash and light fastness property as compared to the local fabrics which also show high wash and light fastness property.

Abstract: Bullet proof vest is one of the protective application which helps for protection of ballistic impact to the fabric who wears the vest. In previous days hard rigid materials are used to protect the ballistic impact to the wearer, which resist the penetration and dissipated the impact. Then synthetic textile fibres are used for ballistic resistance and in recent days, the high performance textile fibres are used to resist the ballistic impact. Now a day, Kevlar fibre is used to produce bullet proof vest which has some disadvantages of less is compression property. Nylon filament yarn and Carbon nanotube can an alternative for existing Kevlar bullet proof vest. So combining of nylon filament yarn and carbon nanotube can be effectively fulfilling the requirements of ballistic impact and safe the life of wearer. Nylon filament yarn of 858 denier and 1330 denier was taken for the work. The multi layer woven fabric was produced by using nylon filament yarn of two various deniers. The fabric weave structure is plain weave. Double cloth and triple cloth was produced for protection of ballistic impact, because each fabric layer reduces the energy of projectile. The developed multi layer fabrics can be coated with multiwalled carbon nanotube by using textile coating method. The technical test and field test can be carried to existing bullet proof vest, un coated nylon bullet proof vest and coated bullet proof vest. The developed triple cloth will shows more ballistic resist than double cloth. The developed plaited Glass/Wool bended fabrc can used for thermal proof application because of high Limiting oxygen Index. Nylon with Carbon nanotube coated fabric can also be used for thermal proof application.

Keywords: Ballistic impact, Tearing strength, Cover factor , multi layer fabric, thermal conductivity

Abstract: The leather used was obtained from cow hides; goat and sheep skins. The dyeing of the leather was carried out with the use of anionic dyes: direct dyes (Solophenyl black) and acid dyes (Erionyl red, Ingrain black and Amido black). It was found that dyeing the leather with Ingrain back which is a metal complex dye had the highest dye levelling and quick rate of exhaustion, as compared to the other anionic dyes, owing to presence of metal ions which attach themselves readily to specific sites on the leather substrate, forming a strong ionic bond. It was also discovered that at certain temperature above 60°C that the leather tends to shrink and becomes strong and rigid after drying.

Abstract: During injection molding process, the mold temperature is one of the most important influences on the product quality. In this paper, the temperature of the core plate with the size of 100 mm × 100 m × 40 mm will be examined for different product sizes. Different types of heating and cooling channels are inserted in the core plate. The size of the plastic product will be changed from 40 mm to 80 mm, with varying heights. Simulation method will be utilized to observe the heating and cooling steps. The temperature values and distribution will be collected and compared. Results show that when the product size changes, the heating and cooling steps have a slight variation. However, the product height has a strong effect on the mold temperature. When the height increases from 1 mm to 9 mm, the highest heating temperature reduces from 104 °C to 82.5 °C. The simulation results were verified by an experiment. The comparison between the simulated and the experimental results shows a good agreement between them.

Keywords: Injection Molding, Mold Temperature Control, Mold Heating, Mold Cooling, plastic process