| 摘要 |
PURPOSE:To prevent winding adhesion after forming a photopolymerizable photosensitive resin on a support in a manufacturing process by forming a backing layer on the side of the support opposite to the side of the resin layer. CONSTITUTION:The backing layer contg. a matting agent of an inorg. fine powder, such as silicon dioxide including colloidal silica, dispersed into acetyl cellulose is formed on the surface of the support reverse to the side on which the photopolymerizable photosensitive resin layer is formed, and as the acetyl cellulose, monoacetyl cellulose, etc., are enumerated, and, preferably, it has an acetylation degree of 40-60% and an average polymn. degree of 50-400. It is preferred to add the matting agent in an amt. of 1-60wt% of the acetyl cellulose. |
