| 摘要 |
PURPOSE:To obtain the fabric capable of providing a black printed board excellent in electrical characteristics by depositing a mixture of red, blue and yellow pigments on a glass-fiber fabric and limiting the light reflectivity. CONSTITUTION:A mixture of red, blue and yellow pigments is deposited on a glass-fiber fabric to obtain the glass-fiber fabric, and its optical reflectivity by the double-beam method is controlled to <=60%. The amt. of the red pigment to be deposited is controlled to 0.5-2.0%, that of the blue pigment to 0.15-0.6% and that of the yellow pigment to 0.15-0.6%. In this case, the pigments are dispersed in water, the fabric is dipped in the dispersion to deposit the dispersion of pigments on the fabric, and the fabric is squeezed by a mangle to a fixed pickup to obtain the product fabric. |
