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Патент USA US2105509

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Patented Jan.’ 18, 1938
2,105,509
TREATMENT OF TEXTILE MATERIALS
Harvey A. Schwartz, Cleveland, Ohio, assignor to
Industrial Rayon Corporation, Cleveland, Ohio,_
a corporation of Delaware
No Drawing. Application March 8, 1934,
Serial No. 714,690
11 Claims.
This invention relates to the treatment of
textile materials to alter the dyeing characteris—
tics of the same and, more particularly, to a
method of securing cross-dyeing effects by com
5 bining materials so treated with others which
have not been treated and dyeing the fabric thus
formed.
In the manufacture of cross-dyed fabrics, the
warp threads may be of one material and the
1" weft threads of another material, the two mate
'
(Cl. 8-5) '
The amount of treatment required can be readily
determined for any set of operating conditions
which may prevail. Preferably, the thread
should be exposed in the untwisted condition in
order to illuminate a greater thread area and, in CH
practice, the thread may be caused to travel be
tween a plurality of lights which irradiate all
sides of it, the rate of travel of the thread through
the zone of exposure being so chosen that the de
sired modi?cation of the dyeing characteristics
iials having different dyeing properties when the
results.
fabric is dyed. As a result, one set of threads
comes out a lighter shade than the other and a
Thread so treated, when woven or knitted into
a fabric and compared with a control fabric made
cross-dyeing effect is secured.
from untreated thread of the same nature, dyes
15
a considerably lighter shade than the control.
The treated thread may be stored for a time
until it is desired to work the same up into fabric
or the irradiation may be effected and the thread
As examples of
'
15 materials used for thispurpose, there may be
mentioned cellulose acetate yarn and viscose yarn,
the mixed fabric giving a two-color effect due to
the fact that the viscose yarn takes the dye more
readily than the acetate yarn.
It has now been found that similar cross-dye
ing effects may be obtained by the use of only one
kind of thread in the fabric. The result may be
secured by exposing a quantity of the thread to
the effect of radiation containing actinic rays.
1:‘- The thread thus treated, when woven or knitted
into a fabric with other untreated thread, will
have previously been of one material and the weft
threads of another material, the two materials
having different dyeing properties. By means of
the present invention, it is possible to secure these
take a dye in a different manner from the un
cross-dyeing effects by the use of one kind of
treated thread and produce effects similar to
those achieved by the use of two quite different
thread, for example, viscose thread. The vthread
to comprise the warp threads is treated with radi
then immediately woven or knitted into fabric
and dyed. One practical application of the in 20
vention is in the making of cross-dyed fabrics,
as mentioned above, in which the warp threads
5“) kinds of yarn.
ation containing actinic rays, in accordance with‘ '
It is, accordingly, an object of the invention to
provide a method of treating textile materials‘ to
alter the dyeing qualities of the same. Another
object of the invention is to provide a method of
:35 treating‘ arti?cial silk thread consisting essen
tially of regenerated cellulose by means of radia
the invention, and combined with otheruntreated
tion containing actinic rays to modify its dyeing
qualities. A further object of the invention is to
provide a method of treating regenerated cellu
w lose thread with radiation containing actinic rays,
incorporating this in fabric with untreated
thread, and then dyeing the fabric to secure cross
dyeing effects. vOther objects of the invention
will inpart be obvious and will in part appear
4.3‘ hereinafter.
The method of the invention may be carried
out by subjecting thread, such as viscose, cupram
monium cellulose or nitro-cellulose thread, to the
light from a carbon arc lamp, a mercury vapor
7'" lamp, or the like. All sides of the thread are ex
posed to the radiation and the treatment con
' tinued as’long as necessary to give the desired
result. The time of exposure will, of course, vary
according'to the power of the lamp used and the
:35 distance therefrom at which the yarn is located.
thread used as the weft threads. The formed
fabric is then dyed and, upon completion of this
operation, it is found that the irradiated threads
have been dyed a lighter shade than the untreated
threads, thus giving a cross-dyeing effect.
The type of radiation may be varied but it is
found preferable to include ultra-violet rays
therein. The effect is probably super?cial, ‘af
fecting only the surface layer of the individual 40
fibers or ?laments but, whether or not the effect
is more deep-seated than this, the fact remains
that the dyeing characteristics of the treated ma
terial are changed. Direct dyes have shown a
distinct contrast when applied to a fabric com
posed of treated and untreated threads, but acid
and basis dyes may also be applied where cross
dyeing is desired.
4
It is intended that the patent shall cover, by
suitable expression in the appended claims, what-' ‘'
ever features of patentable novelty reside in the
invention.
What I claim is:
'
1. A method of v securing cross-dyeing effects
which comprises subjecting viscose thread to '
2
aroasoo
radiation containing actinic rays, meanwhile
controlling the duration and intensity of said
and duration of said radiation so as to effect a
radiation so vas to effect a modi?cation ‘in the
generated cellulose, and, after modi?cation of
the dyeing properties of the regenerated cellulose,
dyeing properties of said thread, weaving or
knitting said thread with viscose thread which
li’as not been so treated, and dyeing the fabric so
formed.
.
2. A method of securing cross-dyeing e?ects
which comprises subjecting regenerated cellulose
10 thread to radiation containing ultra-violet rays,
meanwhile controlling the duration and intensity
of said radiation so as to effect a modi?cation in
modi?cation of the dyeing properties Of the re
dyeing the same.
5
6. A method of manufacturing dyed viscose
thread comprising subjecting the viscose thread
to radiation containing actinic rays, meanwhile
controlling the intensity and duration of said
radiation so as to effect a modi?cation of the 10
dyeing properties of the viscose thread, and
thereafter dyeing the same.
the dyeing properties of said thread, combining
7. Cross~dyed fabric embodying regenerated
said thread in a fabric with thread which has
not been so treated, and dyeing the fabric.
3. A method of securing cross-dyeing effects
cellulose threads the dyeing properties of which
have been modi?ed by actinic radiation.
8. Cross-dyed fabric embodying threads of re
generated eellulose the dyeing properties of which
have been modified by aetinic radiation and other
threads the dyeing properties of which have not
been modi?ed.
9. Cross-dyed fabric embodying threads of re—
which comprises subjecting regenerated cellulose
thread to radiation containing ultra-violet rays,
meanwhile controlling the duration and intensity
20 of said radiation so as to effect a modification
in the dyeing properties of said thread, combining
said thread in a fabric with regenerated cellulose ‘ generated cellulose the dyeing properties of which
thread which has not been so treated, and dyeing
have been modi?ed by ultra-violet radiation and
the fabric.
‘
4. A - method of manufacturing dyed re
‘ generated cellulose comprising subjecting the re
generated cellulose to radiation containing actinic
rays, meanwhile controlling the intensity and
vduration of said radiation so as to effect a modi?
cation of the dyeing properties of the regenerated
cellulose, and, after modi?cation of the dyeing
properties of the regenerated cellulose, dyeing
similar threads of regenerated cellulose the dye;
ing properties of which have not been so modi?edv
10. Cross-dyed
fabric
embodying
viscose
threads the dyeing properties of which have been >
modi?ed by ultra-violet radiation.
11. A cross-dyed fabric comprising threads of
normal regenerated cellulose, other threads of 30
similar regenerated cellulose modi?ed by ultra
5. A method of manufacturing dyed regen
erated cellulose comprising subjecting the re
violet radiation, and a dyestu? in the respective
threads added from a single dye bath in varying
character and amount according to the extent of
modi?cation of said other threads by such ultra
generated cellulose to radiation containing ultra
violet radiation. '
the same.
'
violet rays, meanwhile controlling the intensity
’
HARVEY A. SCHWARTZ.
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