| 摘要 |
PURPOSE:To obtain a warp sizing agent for glass woven fabric suitable as a reinforcing material for a resin board such as a board material of an electronic material, having more excellent tensile strength, electrical insulating properties and CAF resistance than those of a conventional material. CONSTITUTION:This warp sizing agent comprises a polyvinyl alcohol as a main constituent component and the amount of an alkali metal compound remaining in the main component is <=0.5wt.%. |
