Patent ID: 11920263
Assignee: NATURAL FIBER WELDING, INC.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 6:
7. A dyeing and welding process comprising:
a) creating a suspension of a plurality of indigo dye particles in a first process solvent, wherein said first process solvent comprises an ionic liquid;
b) dissolving a first portion of said plurality of indigo dye particles in said first process solvent, wherein the dissolving does not include reduction of the indigo;
c) applying said first process solvent to a substrate, wherein said substrate comprises a cellulosic-based biopolymer;
d) controlling a temperature of said first process solvent and said substrate;
e) applying an amount of electromagnetic energy to said substrate;
f) controlling a time for which said first process solvent interacts with said substrate; and,
g) removing at least a portion of said first process solvent.