BigPatents India

1 A process of manufacturing by upgradation of Indian cow wet blue split leather to value added leather product comprising the following steps. a. Drumming by treating the W/B with water and chemicals depending on the process b. Mechanical operations by setting so as to remove water and flattening the pieces. c. Nailing types of drying the leather, and flat the pcs. d. Hooking dry the leather. e. Mollissa for softening the leather. f. Milling, softness is leather control point is time. g. Buffing the leather surface smooth. The checkpoint is buffing paper and pressure adjustment. h. Spray / Padding put the binder in leather surface, the checkpoints are pressure and temperature wherein. Binder should be uniformly sprayed. i. Platting the surface smooth & nice. The checkpoints are pressure and temperature. j. Buffing the surface fine, the checkpoints are Buffing paper and pressure. k. "Finishing" the crust leather by the Indirect transfer finishing process check points. i) number of coating & letious vii) type of aliphatic / aromatic single and two component polyurethane used for finishing. viii) the thickness of the finishing film. ix) Time and Temperature used for curing the film. x) Method of rolling the composite of split crust, PU film and the release paper to ensure uniform tightness. xi) Curing the composite in the roll form, both time and temperature are important. 1. Releasing of the leather from the composite. in. Post finishing the PU finished split leather with suitable finishing to provide the required feel, touch and appearance. n. Finally assorting measuring and packing.