.~ With chemical or physical modification of liberated fiber
DEFINITION
Classification: 162/9
(under subclass 1) Processes combined with a chemical or physical modification of the liberated fiber.
(1) Note. Examples of chemical or physical modifications included a formation of a cellulose derivative, change of shape of the fiber as curling, twisting, untwisting, puffing, swelling (with agent other than water), etc.
(2) Note. Excluded from this subclass are (1) dyeing, (2) removal of a constituent of the fiber unless accompanied by some physical deformation of the fiber such as curling, puffing, etc., and (3) hydration, mercerizing or parchmentizing of the fiber, even though combined with a digestion or purification of the fibrous material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
79, for processes of parchmentizing cellulose fibers by use of zinc chloride.
82, for processes of parchmentizing cellulose fibers by use of sulfuric acid.
90, for processes of mercerizing cellulose fibers. 146, and 157.1+, for processes of making paper products (depositing from liquid suspension) in which chemically modified fibers are employed.
