| 摘要 |
<p>1481212 Moulding matrices NIPPON PAINT CO Ltd 8 April 1974 [6 April 1973] 15488/74 Heading B5A [Also in Divisions B6 and C3] A matrix for the .preparation of printing plates or decorative surfaces is produced by embossing a sheet of syndiolactic 1,2-polybutadiene containing a photoinitiator and hardening the sheet by irradiation, e.g. with a mercury lamp. The sheet is either extruded to a thickness of 0À1-10 mm. or is laminated or coated on a paper support to give a layer 0À01- 0À1 mm. thick. The printing plates may be produced by embossing or casting a sheet of thermoplastics material, e.g. 1,2-polybutadiene and/or polypropylene in contact with the matrix. As shown a roll 8 of thermoplastics material is softened by heater 2 (100-200‹ C.) and passed through nip rollers 3 and 4 one of which carries a matrix 10 of syndiolactic 1, 2 PBD.</p> |
