| 摘要 |
<p>1508253 Printing process SCHERING AG 4 Aug 1976 [5 Aug 1975] 32484/76 Heading C4A In a process for printing surfaces by the intaglio or flexographic printing process, there is used a solvent-free printing ink which is contained in the molten state in the ink boxes of the apparatus and which comprises a pigment or dyestuff and, as thermoplastic binding agent, a polyamide or polyesteramide or mixture of two or more thereof, and which has a softening point (ring and ball) in the range of from 90 to 160‹C and which at the working temperature of the printing process has a viscosity no more than 0À5 Pa.S. The terms polyamide and polyesteramide refer to products prepared from reactants at least one of which has at least two functional groups i.e. including dimers and other oligomers.</p> |
