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Патент USA US2407603

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Patented Sept. 10, 1946
2,407,602
UNITED STATES PATENT OFFICE"
21,407,602
PROCESS FOR MILLIN G FABRICS CONTAIN -
ING Woof. AND
CELLULOSE ACETATE ‘
Alan Shirley Cluley and Tom Gladstone Allen,
Nuneaton, England, assignors to Courtaulds
Limited, London, England, a British company
N0 Drawing. Application January 16, 1945, Serial
No‘.
573,140. In Great Britain‘ February 25, ‘
19 4
1
7 Claims. (01. 26-19)
-This invention relates to obtaining improved.
fabrics containing blends of wool and cellulose
acetate staple ?bre, and more particularly to
obtaining a milled ?nish on these fabrics.
The process of milling fabrics involves the ap
plication of friction and pressure to the fabric
while it is running in a hot soapy, acid or alkaline
solution. A heavily milled cloth presents a close
by weight of plasticiser to 100 parts by weight
of cellulose acetate is a convenient proportion,
but lower or higher quantities of plasticiser, for
instanceup to 80 or 100 parts by weight, may
. be’ used when a greater milling effect is required.
Examples of suitable plasticisers which may
be used in our invention include dimethyl
phthalate, tricresyl phosphate, glycerol monolac
compact ?brous surface which obscures the
weave. It has also been found thatwhen fabrics 10 tate triacetate, dimethyl cyclohexanol oxalate,
triacetin, diacetone alcohol, ethyl lactate and
of this nature are dyed and ?nished an unpleas
cyclohexanone.
ant harsh cold and “papery” handle results.
The following examples will serve to illustrate
This unpleasant handle may be due to insu?i
the present invention which is by no means re
cient or irregular shrinking of the fabric. As
disclosed in the speci?cation of British applica 15 stricted to the examples:
Example 1
tion No. 356,681 cellulose acetate ?bre has the
property of reducing the tendency to shrink of
A
length
of
woven
fabric constructed from
?bres associated therewith which are made from
equal parts of wool and cellulose acetate staple
materials that tend to shrink when exposed to
?bre is scoured with 0.5 per cent solution of soap
water or other aqueous liquids.
.
20 on a combined scouring and rotary milling ma,
The object of the present invention is to pro
chine. The fabric is then impregnated at 40°
vide a process of obtaining a milled ?nish on
centigrade with 40 volumes of an aqueous emul
a fabric consisting of a blend of wool ?bres and
sion containing ?ve grams of dimethyl phthalate
cellulose acetate staple ?bres.
per
which has been emulsi?ed by the addi
A further object is to provide fabrics having 25 tion litre,
of
1.0
gram of triethanolamine oleate, and
a, heavily milled ?nish and a soft handle from
is then squeezed until it contains its own weight
blends of wool ?bres and cellulose acetate staple
of liquid. The fabric is then impregnated with
?bres.
a soap solution containing 100 grams per litre
We have now found that We can obtain a sat
and a milling operation is carried out for seventy
isfactory milled ?nish on a fabric containing a 30 ?ve minutes at a temperature of from 35° to 40°
blend of wool ?bres and cellulose acetate staple
centigrade. The fabric is then thoroughly washed
?bre if the latter contains a plasticiser.- The
and dried. It will be found that the fabric has
plasticiser may be introduced into the cellulose
shrunk in width and length to a much greater
acetate staple ?bre either before or during the
extent than a similar fabric milled under similar
milling operation. For instance a fabric obtained
conditions but omitting the pretreatment with -,
from wool and cellulose acetate staple ?bre may 35 the dimethyl phthalate.
Moreover the fabric
be treated with an aqueous solution or dispersion
has a softer handle.
of a substance which plasticises cellulose acetate
Example 2
prior to the milling operation, or the plasticiser
may be added to the milling solution. The mill 40 A piece of fabric knitted from wool and cellu
ing‘ operation may be carried out on the dyed
lose acetate staple ?bre is impregnated with 40
fabric and in this case the plasticiser may be
volumes of a solution containing 20 grams per
added to the dyeing solution. If desired the
litre of diacetone alcohol in thirty minutes at
plasticiser can be incorporated in the cellulose
room temperature, and then squeezed until it
acetate ?bre during its formation or at any other 45 contains its own weight of solution. Itis then
time previous to blending it with wool.
impregnated with a solution containing 50 grams
The plasticiser used for carrying out the proc
per litre of sodium oleate and again squeezed un
ess of our invention is preferably a, high boiling
til it contains its own weight of liquid. It is then
liquid organic solvent or softener for the cellulose
milled for thirty minutes in the milling stocks at
acetate. Water-insoluble plasticisers are parties‘ 50 ordinary temperature. On comparing the fabric
ularly useful for carrying out our process. The
amount of plasticiser used depends on the type
of plasticiser, the proportion of cellulose acetate
present in the fabric and the liquor to fabric
ratio of the treating bath. From 20 to 30 parts
with a similar fabric milled without the pretreat—
ment it will be found that considerably more
area shrinkage has taken place.
What we claim is:
55
,
1. A process of obtaining on a wovenor knitted
2,407,602
a solution of a plasticiser for the cellulose acetate
fabric containing a blend of wool ?bres and cel
and thereafter subjecting the plasticiser-contain
lulose acetate staple ?bres, a close compact ?brous
ing fabric to a milling operation.
surface which obscures the original structure,
5. A process of obtaining on a Woven or knitted
which comprises milling said fabric in the pres
fabric-.ueontainingl». a blend“ Ufa-W601‘ ?bres and
5
ence of »3,:~' plasticisem for theecellulosemcetatee
celluloseae acetates staples. ?b'rew. a I. closet compact
staple ?bres. ..
?brous surface which obscures the original struc
2. A process of obtaining on a woven or knitted
ture, which comprises treating the fabric with
fabric containing a blend of wool ?bres and eel-1e ‘
lulose acetate staple ?bres, a close compact ?
an emulsion of a plasticiser for the cellulose ace
tate'eandiathereafterl“ subjecting the plasticiser
brous surface which obscures‘the=ori'gmai1:struc= 101." containing ‘fabric-to a milling operation.
ture, which comprises milling said'fa‘bric ‘ifrtlie"
6-.'-..A.process;of)obtaining on a woven or knitted
presence of a water-insolubleaplasticiser..for the‘:
fabrics! containing; a' blend of wool ?bres V and
cellulose acetate staple ?bressw
cellulose-sacetateéistaple ?bres, a close compact
3. A process of obtaining onta'swoveniorfknittedx
?brous surface which obscures the original struc
fabric containing a blend ofwool ?bres ,and cel- l5. turejiwh'icli‘icomprises"subjecting the fabric to a
lulose acetate staple ?bres,ia; close: compacti'?;
n‘iilli‘n‘g op‘erationina milling solution containing
brous surface which obscures th'e‘original'struc
a plasticiser for the ‘cellulose acetate.
‘
ture, which comprises milling said fabric in, the
'kAi-p'rocess of obtaining on a woven or knitted
presence of from 20 to 30 parts by weight-cigar -> fabric containing a blend of wool ?bres and
20
plasticiser for cellulose acetate for 100 parts by
weight of “cellulose 1306173178 :staple :?brea
4;»Azprocess .oflobtaining on atwoven rorlkrlittedn
fabl‘iczscontaining;~ a“. blends-0f» wool ?bres‘: and;
cellulose: acetate. staple e?bres, a1 closezrcompact-i
?brousr'surfacewhichiobscuresxthe original ‘st-mew
turetzwhi'chv comprises: treatingcth‘ew fabric‘: with
cellulose“ acetateestaple- ?bres,‘ a’: close; compact
?brousrsurf ace which’. obscures: the io-rigina-l strucee
ture;whichicomprises millingzsaid ‘fabric inathes
presenceo?dimethyl phthalates
V
’
ALAN: SHIRLEY CLULEYa ~
TOM- GLADSTONEeALLEN-al
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