| 摘要 |
<p>PURPOSE:To obtain an ink roll for a printer excellent in the impregnation of ink and the uniformity of the impregnated ink by press-molding soft polyurethane foam having a three-dimensional reticulate structure without cell films in the axial direction of an ink roll. CONSTITUTION:Soft polyurethane foam having a three-dimensional reticulate structure without cell films and with 20-60 per 1cm number of cell is heated to 130-220 deg.C and then compressed and permanently deformed at a compression ratio of 1/3-1/15 by a hot press in the direction of an axis 2 of an ink roll 1 to be obtained. Hardness of thus compressed polyurethane foam is measured by a rubber hardness meter of Ascar C type (Japan Rubber Association Standard SR1S-0101) and arranged to be in a range of 15 deg.-60 deg.. Then, the compressed foam is cut out into a desired shape to obtain the ink roll 1. By so doing, communicating spaces are formed in such a manner that internal communicating spaces 4 are flatly crushed to the compression direction (the axial direction of the roll 1), so that ink is impregnated in the spaces 4.</p> |
