| 摘要 |
1,237,671. Laminae; seaming non-metallic sheet material. EASTMAN KODAK CO. 3 Jan., 1969 [3 Jan., 1968; 27 May, 1968], No. 434/69. Headings B5K and B5N. [Also in Divisions C3 and D1] In Example 3, a lap joint between two pieces of heavy kraft paper is made by placing between them a film cast from a solution in water of the polyester derived from 0À25 mole dimethyl isophthalate, 0À125 mole dimethyl terephthalate, 0À075 mole hexahydroisophthalic acid, 0À05 mole dimethyl 5-sodiosulphoisophthalate and 0À65 mole diethylene glycol, and then pressing with a hot iron. In Example 4, two poly(ethylene tere. phthalate) films are coated with a solution of the polyester of Example 3 in water and after drying the two such pieces are pressed together with a hot iron. |
