the polyester dtys are woven with the warp of 75 denier per 36 filaments and the weft of 150 denier per 48 filaments wherein the warp density is about 8 800 yarns and the weft density is 72 t per inch furthermore the polyester dtys may be woven with the warp of 75 denier per 72 filaments and the weft of 75 denier per 72 filaments next the fabric is heated and cooled rapidly so that its width is reduced by 10 to 15 there are various heating methods but in this invention a jig type machine is used and in this instance the fabric is treated for 7 to 8 hours while keeping temperature of 180 u00b0 c when the width of the fabric is 74 inches after the above process the fabric is cooled rapidly to thereby be shrunk the rapidly cooling process is carried out twice in such a way that the fabric is shrunk sufficiently till it becomes a 74 inch fabric with a width ranging 64 inches to 65 inches then the fabric density gets higher so that yarns close together and get dense and hence it can be prevented that the coating liquid is permeated to the rear face of a coated face during a rear face coating process which will be carried out later it also can prevent the curling of the fabric and.