Abstract: An inspection system of a filament yarn, including: an irradiation means configured to irradiate the filament yarn with inspection light; a measurement means configured to measure with an area sensor a luminance level of a shade and a background of the filament yarn; an image processing means configured to obtain image information on the basis of information obtained from the area sensor; and a determination means configured to decide a type and a frequency of an error from the image information and determine an inspection result of the filament yarn on the basis of a threshold value according to the error is provided.

Abstract: Glass cloth which is formed of a warp yarn and a weft yarn of the same glass yarn, wherein a ratio of warp yarn width to weft yarn width is not less than 0.80 and not more than 1.20 and a ratio of an elongation rate in a length direction when a load in a range of 25 N to 100 N per 25 mm width of the glass cloth is added in a warp yarn direction, to an elongation rate in a width direction when said load is added in a weft yarn direction is not less than 0.80 and not more than 1.20.

Abstract: Glass cloth which is formed of a warp yarn and a weft yarn of the same glass yarn, wherein a ratio of warp yarn width to weft yarn width is not less than and not more than 1.20 and a ratio of an elongation rate in a length direction when a load in a range of 25 N to 100 N per 25 mm width of the glass cloth is added in a warp yarn direction, to an elongation rate in a width direction when said load is added in a weft yarn direction is not less than 0.80 and not more than 1.20.

Abstract: The present invention is (1) a glass cloth composed of a group of warp yarns and a group of weft yarns wherein one of the group of the warp and weft yarns are arranged with substantially no gap between the yarns, and, in that group, a width A (?m) of a cross-section of the yarn arranged with substantially no gap, a single-fiber diameter L (?m) of the yarn, the number N of single-fibers constituting the yarn and a weaving density C (ends/25 mm) of the glass cloth composed of the yarns satisfy the following equation (1-a): C×A/(25×L×N)?1.

Abstract: Glass cloth which is formed of a warp yarn and a weft yarn of the same glass yarn, wherein a ratio of warp yarn width to weft yarn width is not less than 0.80 and not more than 1.20 and a ratio of an elongation rate in a length direction when a load in a range of 25 N to 100 N per 25 mm width of the glass cloth is added in a warp yarn direction, to an elongation rate in a width direction when said load is added in a weft yarn direction is not less than 0.80 and not more than 1.20.