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Патент USA US2130460

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Patented Sept. 2c, 1938
'
r
2,130,460
UNITED STATES PATENT, OFFICE
£130,460
TREATING OELLULOSIC FIBER
John Gwynant Evans, Blackley, and Sidney
Arthur Slater, Stretford, England, assignors to
Imperial Chemical Industries Limited, a cor
poration of Great Britain
No Drawing. Application March 23, 1936, ‘Serial
No. 70,548. In Great Britain March 25, 1935
4 Claims. ‘(CL 19-66)
It is known that certain dif?culties are en~
countered in the spinning of staple ?ber, that is
The following example illustrates but does not
limit the invention. The parts are by weight.
?ber composed of short lengths of viscose, acetate
'
and similar rayon, into yarnowing to the tend-
7
5 81.105.’ of the ?bers to Shp when bfamg twlsted'
Similar, though less pronounced difficulties are
met with in the spinning of the smoother cell'u-
'
'
Example
Staple viscose ?ber is treated for 16 minutes at 5
450 C in 1000 parts of water containing 10 parts
of a x'nixture or emulsion consisting Of_
losic ?bers such as ?ax and ramie or in the
spinning of short staple cotton ?ber such as some
‘
10 kinds of Indian cotton, which in order to obtain
Part3
Glue ____ _; ____ __'_ __________________ .._
a commercially useful thread, have to be spun
Cetyl sodium sulphate___________ __Y____
75
with a considerable amount of twist.
It is an object of the present invention to avoid
colophony _________________________ __
Caustic soda ?akes"; _______________ __
330
35
or minimize these di?iculties. It is a further
l5 object to produce spun thread of improved properties.
.
‘250
10
Salicylic acid ______________________ __~_
71/2
Water _____________________________ __ 1, 425
15
It is a further object to produce new and
_
_ useful compositions of matter_ other objects
will become apparent as the description pro_
_
_
.
After treatment the material is centrifuged and
dried. The ?ber is then spun in the normal
ceeds.
We carry out our invention by treating ¢e11u_
manner and owing to the increased adherence
between the ?bers, a yarn of increased strength 20
losic ?ber of whatever origin, whether natural
with a given twist results Short staple cotton
20 I
or arti?cial or composed of pure cellulose or of
?ber, ?ax and ramie ?ber may ‘be _ slmllarly
cellulose derivatives, with a solution'or emulsion
treated in Order to improve‘ then‘ SDlnnlng quali
of colophony.
25
It is known to treat rayon fabric, i. e. already
ties.
_
We clalmi
woven material, with resin acids or alkali metal
salts of resin acids to produce on the surface of
_
-
_
the-component threads a deposit which imparts
con?ammg a small amoun? of colophony’ cetyl
to it a non-displacement ?nish (see British spec-
Sodlum Sulphate’ and caustlc Soda
30 i?cation 388,157) but it was not to have been ex-
2- Staple Qenulosic ?bers prod‘lced by the 30
pected from anything disclosed in that speci?ca-
Process of clalm 1-
tion that treatment of ?ber according to the
present invention would facilitate its spinning as
above mentioned or indeed that such treatment
35 would not impede spinning or make it jmpgssjbla
Our preferred method of applying the colo-
3- The
_
_
tiseptics, stiffening agents, weighting agents.
The ?ber is immersed in a suitable solution until'
permeated, excess solution removed and the ?ber
dried.
There is thus obtained a new composition
45 of matter, namely unspun cellulosic ?ber attached
Smooth Staple ?laments of a chemically modi?ed
, cellulose taken from the class consisting of WS
cose and cellulose acetate with a solution obtained 35
by mlxlng
colophony _________________________ __
i0 dition, as compared with ordinary ?ber, as has
been described.
,
330
40
.
andWater
adding 10 parts of the mixture to 1000 parts 45
of
'
been employed in conjunction with colophony.
This improved composition possesses improved
Parts
250
. 75
Caustic soda _______________________ __
35
Salicylic acid _______________________ __
7. 5
Water _____________________________ __ 1, 425
to colophony and any assistant which may have
properties, whether in the unspun or spun con-
_
Process which compnses treatmg
phony is from an aqueous solution or emulsion dissolved or emulsi?ed by means of alkali in conGlue _______________________________ __
junction with other assistants used in textile
Cetyl sodium sulphate _______________ __
40 treatments, more especially softening agents, an-
25
1- The process which COmPI‘ISBS treatlng
Sm°°t_h._ Staple cellulosic ?bers with a solution
.
l4; sgaple ?bers obtamed by the Process Qf
calm
.
-
_
JOHN GWYNANT EVANS.
SIDNEY AR'I'HUR SLATER.
50
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