Improvements in Dissolving Nitro-cellulose, and in the Treatment therewith of Vegetable Textile Material, such as Cotton Yarn, for Imparting to it a Silk-like Gloss.
Year: 1897

page_text: Date of Application, 22nd July, 1857
Complete Specification Left, 19th Apr., 1898-Accepted, 20th May, 1898
Date of Application, can vary, Tor
Complete Specification Left, 19th Apr., 1898-Accepted, 20th May, 1898
PROVISIONAL SPECIFICATION.
Improvements in Dissolving Nitro-cellulose, and in the Treatment
therewith of Vegetable Textile Material, such as Cotton Yarn, for
Imparting to it a Silk-like Gloss.
I, JASPER WETTER, Patent Agent, of 37 and 39, Essex Street, Strand, in the
County of London, do hereby declare the nature of this invention (a communication
from the Firm of Heberlein & Co., Manufacturers, of Wattwyl, Switzerland,)
to be as follows:-
The Specification of British Letters Patent No. 13198 of 1896 describes a
process for dyeing cotton and other vegetable fibres with a silk-like gloss by
means of collodion, that is to say, a solution of nitro-cellulose in alcohol and
ether.
The present invention has for its object, to impregnate cotton fibres with
nitro-cellulose in a simpler, cheaper, and more perfect manner, so that with the
aid of suitable apparatus the yarn may be treated in the hank, or while wound on
spools.
The invention consists in a new process for dissolving nitro-cellulose, and
in the application of solutions thus obtained, for imparting to vegetable textile
material, such as cotton yarn, a silk-like gloss.
If nitro-cellulose be steeped in an equal weight of alcohol and allowed to
stand for some time, it acquires the property of dissolving in many inorganic
substances, such as solutions of certain metallic oxides and acids, but especially
in caustic alkalies, at ordinary atmospheric temperatures. The strength of the
alkaline solvent, and the quantity of nitro-cellulose to be dissolved in the same,
are variable within wide limits. As a rule, the best results are obtained with
solutions of 3 to 5 per cent. of nitro-cellulose in caustic soda lye of 5° to 10° Bé.
With the new process it is no longer necessary, to pass each thread separately
through the liquid; the yarn may be impregnated in hanks of any desired
length, the nitro-cellulose penetrates the fibres, instead of being merely deposited
on the surface, and the fibre treated with this process is soft and pliable, and can
subsequently be dyed without losing its gloss.
Dated this 22nd day of July 1897
Improvements in Dissolving Nitro-cellulose, and in the Treatment
therewith of Vegetable Textile Material, such as Cotton Yarn, for
Imparting to it a Silk-like Gloss.
I, JASPER WETTER, Patent Agent, of 37 and 39, Essex Street, Strand, in the
County of London, do hereby declare the nature of this invention (a communication

page_text: from the Firm of Heberlein & Co., Manufacturers, of Wattwyl, Switzerland,)
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
a
The Specification of British Letters Patent No. 13198 of 1896 describes
process for dyeing cotton and other vegetable fibres with a silk-like gloss, by
means of collodion; that is to say, a solution of nitro-cellulose in alcohol and
ether.
The present invention has for its principal object, to impregnate cotton fibres with
nitro-cellulose in a sinipler, cheaper, and more perfect manner, so that with the
aid of suitable apparatus the yarn may be treated in the hank, or, while wound on
spools, but it may be applicable also for other purposes.
The invention consists in a new process for dissolving nitro-cellulose; and
in the application of solutions thus obtained for imparting to vegetable textile
material, such as cotton yarn, a silk-like gloss.
If nitro-cellulose is steeped in an equal weight of alcohol having a strength of
about 95 per cent and is allowed to remain in the same for at least an hour,
it acquires the property of dissolving in many inorganic substances, such as
solutions of certain metallic sulphides, but especially in caustic' alkalies, 'ät
ordinary atmospheric temperatures. The strength of the alkaline-solvent and the
quantity of nitro-cellulose to be dissolved in the same, are variable within-wide
limits. As a rule, the best results are obtained with solutions of 3 to 5 per cent. of
nitro-cellulosè in caustic soda solution of 5° to 10° Bé.
Besides caustic alkalies (hydrate of soda and of potash) the sulphides of sodium,
potassium, and ammonium have. been found useful as solvents for nitro-cellulose
previously treated with alcohol, and among the different varieties of.. highly
nitrated cellulose; trinitro cellulose, tetranitro-cellulose, pentanitro-cellulose, and
mixtures of the same have been tried with good results.
न!
With the new process it is no longer necessary to pass each thread separately
through the liquid; the yarn (Long Island or Egyptian cotton) may be impreg-
nated in hanks of any desired length,, the nitro-cellulose penetrates the fibres,
instead of being merely deposited on the surface, and the fibre treated with this
process is soft and pliable, and can subsequently be dyed without losing its
gloss.
Having now particularly described and ascertained the nature of, my, said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The process for dissolving nitro-cellulose, which consists in first impregnating
it with alcohol, and then dissolving it in an alkali-hydrate or sulphide,
substantially as described..
2. The preparation of nitro-cellulose by treating it with alcohol for at least an
hour, as a preliminary for dissolving it in a solution of an inorganic salt or
compound, substantially as described.
7
3. The process for imparting to vegetable fibre, such as cotton yarn, a silk-like
gloss, which consists in impregnating it with a solution of nitro-cellulose, produced
by means of alcohol and caustic soda, substantially as described.
Dated this 10th day or April 1898.
FAIRFAX & WETTER,
Agents; 37 and 39; Essex Street, Strand, London.
5.
and of
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