| 摘要 |
PURPOSE:To enhance printing sensitivity and printing durability, by using two kinds of specific resins in combination as thermoplastic polymer for forming a polymer coating layer. CONSTITUTION:A polymer coating layer based on a resin having a hydroxyl group in the molecule thereof and a polyolefinic resin is provided to one surface of a porous thin material as a thermal screen printing layer. As the porous thin material, a thin fabric composed of a natural fiber such as Manila hemp, or MITSUMATA, a synthetic fiber such as polyester or nylon, a polyester fiber or silk can be used. As the resin having a hydroxyl group in the molecule thereof, nitrocellulose, ethylcellulose and a polyester resin are designated and, as the mixing ratio of both resins, the ratio of the polyolefinic resin occupying in the total amount of the resins is pref. set to 40-80wt.%. By this method, printing sensitivity becomes especially good, high density printing generating no broken character or blur can be performed and printing durability is enhanced and the generatation of fog can be prevented. |
