Process and apparatus for shrinking prepared bonded fiber color

Details Process and apparatus for shrinking prepared bonded fiber color Process and apparatus for shrinking prepared bonded fiber color

1994-10-28

1996-06-11

Willis, Jr., Prince

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

Cellulose fibers

811551, 8147, 162 70, D06M 1100, D21H 2500

Patent

active

055251226

ABSTRACT:
A process and apparatus for the shrinkage of prepared bonded fiber color printed cellulosic type currency where in the process the prepared bonded fiber color printed cellulosic type currency is substantially free (known as oven dry and/or bone dry) before starting the procedure, then is immersed in anhydrous ammonia solution at low temperature, withdrawn and dried by different techniques. The process of immersing and drying is repeated 1 to 8 times. The apparatus to accomplish this provides for a closed loop and/or stainless steel rack and/or stainless steel tong with a thermally controlled vessel. All apparatus to be immersed and all apparatus to be used to contain the anhydrous ammonia solution should be made from a non-corrosive material (i.e. stainless steel and/or glass) to anhydrous ammonia. The color printing to the shrunken prepared bonded fiber color printed cellulosic type currency is not removed.

REFERENCES:
patent: 4869782 (1989-09-01), Nelson et al.
Coles & Walker, Induced Shrinkage and Structural Reorganization in Ammonia--Treated Wood, 1978, Paperchem No. 50-03407.
Heap, S. A., Liquid Ammonia Treatment of Cotton Fabrics, Apr. 1976, Paperchem No. 48-03351.
CA 76(18):100991m, 1971.

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