Method for producing compacted free-flowing raw materials for varnish
View Patent ↗A process for producing compacted free-flowing nitrocellulose based lacquer raw materials is described. The process involves pressing a nitrocellulose based lacquer feed material, which is moistened with alcohol or water, through the holes of a die. The pressing step may be performed by means of at least one circulating breaker. The process optionally comprises shearing off the compacted lacquer raw material into pieces of selected length, below the die. The compacted nitrocellulose based lacquer raw materials prepared by the process of the present invention are free flowing and have a moisture content of at least 25%.
1. A process for producing compacted free-flowing fibrous lacquer raw materials based on nitrocellulose comprising:
moistening fibrous lacquer raw material with a solvent selected from the group consisting of water and alcohol; and
pressing the moistened fibrous lacquer raw material through a die having a plurality of holes.
2. The process of claim 1 wherein said process is carried out at a pressing ratio, P, as represented by the following formula, P=(length of bore)+(diameter of bore) of from 0.5-5.0.
3. The process of claim 2 wherein said pressing ratio P is from 0.5 to 3.0.
4. The process of claim 1 wherein the lacquer raw material is pressed through the die holes by means of one or more circulating breakers.
5. The process of claim 1 wherein the lacquer raw material is pressed through the die holes by means of one or more oscillating wheels.
6. The process of claim 1 further comprising shearing off the compacted lacquer raw material, below the die, into pieces of selected length.
7. The process of claim 1 wherein the lacquer raw material has a nitrogen content ≦12.6%.
8. A compacted free-flowing fibrous lacquer raw material based on nitrocellulose prepared by the process of claim 1 .
9. The process of claim 1 wherein the compacted free-flowing lacquer raw material has a moisture content of at least 25%.