الفهرس 
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Abstract
Non-traditional and technical applications of textile account for nearly 20% of the global textile market. Automotive textiles are one of the most important markets in the technical textile sector. An average car uses 18% of the automotive textiles for upholstery (seating fabric). Various types of requirements have to be taken into account in the development of interior fabrics, to satisfy both aesthetic and functional demands. The automobile industry in Egypt has been growing fast over the last decade. About 70% of the parts used in car industry in Egypt arc imported. The remainder is locally manufactured; most of them are manufactured by the private sector. The automobile industry in Egypt has to improve the quality of the car interior to face the competition in the international markets. There are many factors affecting the properties of the car upholstery fabrics: fiber type, yarn construction, fabric structure and finishing process. The weathering conditions must be taken into consideration. The primary cause for degradation of fibers is ultraviolet (UV) rays with wavelengths between 2900 - 4000 Angstroms. Radiation by longer wavelengths (visible and infrared rays) also damages some fibers, but this damage is minor compared to that from ultraviolet rays. In this work, the different upholstery fabrics that are available in the Egyptian market (imported and locally produced) are investigated to study the effect of climatic conditions on the automotive upholstery fabrics. This is to make evaluation of the fabrics used in automotive upholstery. Also a simulation ofa car cabin in a shape ofa wooden box covered with a car glass was constructed to expose different fabric specimens to the Egyptian atmospheric conditions. This was for four exposure periods and four seasons (12 months). The specimens were tested after every period.