Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
1330~
Thl-ead, More P~rtic~larly Sewing Thre~d~ as wel as a Methed and
Apparatus S~it~ble for Produciny su~h Thread~
The invention relate~ t~ a thre~d, more pa ticularly sewin~
thread having c.ne clr ~or~ m~in str~nds and on or more bohdin~
strand~ ervin~ to conylutinate the thread tomp site, and t~ an
ap~atus suitabl~ for prc~ducing s~ch thread.
The bondinq str~nd ~ntained in ~hreads of his type ~ts to
co~solidate ~nd conglutinate the thread comp site or twisted
thread. In su~h threads, in~ividu~l twi~ts sh uld be kept fr~m
mc/ving, so as to prevent their ~lidin~ into each ~ther during the
sewin~ p~oce~ure.
'. , '' .
Such a con~lutination or ~onding process sh~uld, h~wev~rr provide
a level ~f ~lasti~ity and bend~ility ~ufficie t to prev~nt the
thread or twisted thr~ad from bec~min~ wiry. ~:
A ~n~wn method ~f above type is predicat d ~n the idea of
twisting the thermoplasti~ bonding filament ~ether with the `~`
main filaments ln such ~ w~ th~t the ~onding filament ~mes ~o
rest in th~ ~ntre of the twist c~mpusiteJ a d that the main
ments, h~vin~ b~en twisted under high tensi n, are ~apable cf
sealin~ Q~f the ~onding filam~nt from the ut~ide 5Q as to
prevent lea~.a~e to the C~Ut5i1ie ot the bond ¦n~a fiiament a~ it
becemes plastic duriny the heating.
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1330411
SUCI1 a me~h~d ne~s~itates~ however~ a very hi~h number ~f twists
that in turn drive up production c~sts. Due to ~uch
unsatisf~:t~ry sealin~a, a p~rtic;ln of the pla~ti i~ecl materi~l i5
liable t~ escap~ fr~m the thre~d ~mpesite. T re~d~ b~,n~ed ~y
this method m~rethr~u~h exhibi~ ~n urls~tisf ctory de~ree ~f
b ~n d i nta or c on t~ 1 ut i nat i on h ~mo~3en i et y .
ICn~wn in ad~itiGn t4 bondin~ proces~e~ inv~ ing melt ~t2nding
filaments~ ~re bondin~ proce~ase5 wherein a chemi ~al bondin~ agent
is first Applied t~ th~ strands t~ be~ nded a ~ ~hen allowed to
set. Threads pr~duced ~y the~;e methods exhi it unsatisf~ctoYy
b~nd s~ren!3th.
the obje~tive of the inventi~n is to cre~ e a thread Qf ~he
fc~resl~in~a type wh~se produ~tion~ despite improved str~nd ~;
siitat~ility, does nc;~t inv~lv~ ~isting~ Alsc~ pr p~d i5 a method
and an appar~t~s suit~e f~r prc,ducing s~h th ead.
The invention satisfies this ~b~ective by an ermin~lin~ a main
s~r~nd ~ormed frotn ~ multifilament main filam nt strand with a -
bondin~a ~trand formed by a m~}~ifilament bondin fi~ament stran~.
;~
The swirled ~tructure ~f the proposed thr~ d, which can be ~ .
-~ pt~duced by a known meth~d involvin~ airstreatll ext-lrir~g inside a
textu~ing n~;z:~le~ pr~m~t~s particulaYly favo~Ara le ~onding
::
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` 1330~1~
cc~nditi~ns ~y addin~ b~ndîn~ fil~ment str~nds ~r the purp~se c~f
~c,nsllutinating indivi~l filamsnt~; of m~in str ~ds ~ormed by the
filament strands The latter are hence re erred tc, as main
filament str~nd~, The c4mmon swirling ~f eith r th~ individual
~ ments ~f the multifila~ent m~in filamen str~nd~s~ or the
individual filaments ~f the multi filament bondi y filament strand
causes l~op5 and ~ends t~ ~ccur i~ ~ne r m~re individual
fil~ment~ Pf the main-or-b~nding f~la~ent str~n s. Su~h 1G~PS and
bEnds dif~use thro~lgh the entire ~ross se.- ic~n ~f the thr~d
c~mposite, ~nd permit a very durable and venly distributed
cc~n~lutinati cln when the bondi n~ f i 1 aments mel t uriny th~ bondi ng
pr~ce~s. The high ~ondin~ stability th~s ~tt~i hëd in the thread
c~-~mpc~site c~viates the need for the strand t~ b twiste~, Should
the prc~pc~sed thread conti3in only a singl0 main filameht ~trar~
lOops ~n~ ~ends c~f individual filamen~ of th ~c~ndiny filament
strand dif~us~ la~er~lly throu~ll th~ indi~i~u~l filaments ~S such
indiYidu~l ~ain filament st~d and a~e~ ue t~ the b~nding
actic,n in~ti3~ted by meltin~, capable cf hc,ldi g t~e individual
~ilaments cf ~he main filament strand to~ ther~ In thss
connertion, the individual filament~ of the ma n filament ~tr~n~
can be premitted tc, run Lln~;wirled ~nd parall 1 te ~ne an~ther.
The bonding capability of the thre~d composit can be further
improved if, during ~wirlin~, the occurence f loop~ and ben~s ~-
~ permits the individ~aI filaments of the main f lament strand to
,~ ,
~: in~erI~ck~ If th~ ~roposed thre~d is constr~c e~ of a pl~lrality
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l4330~
uf main fil~ ?nt strands, the loops and b~ds of the individu~lfilaments of the bonding filam6?nt strand :, ill be able to
r~enetrate the individual filament~ of the Velr ~U5 main filamen~
st r and~ pr esent ~
In one emb~dimen~ ~f the~ p~ posed ~hread c~mp i~in~ one or more
main filam~nt ~tr~nd~, it is ~peci~lly adv~nta~eous if
intermin~lin~ of indiv;d~al filaments of th~ ~ main filament is
aided by loops ancl ~endsr A particularly st2~bl s~r~nd st,Yu~t~re
is produced if indivi~u~l filaments of the mai fil~ment str~nds
mut~la~ ly per,e~rate e~ch other with th~?ir bends ~nd }CC~p5 ~nd i r
the intertwin~d structure i~ con~lutin~ted ~t many different
pc.int5 by the bondin~ filament strancl~s~. A very well--b~nded
thread cc~rnposite can be produced at this stag with the h~elp of
the l:,ondin~3 filament s~rand~? if the l~op ~nd bend~ f the m~in
filanient str~nd that serves al5 the effect ~re permitted to
l~ter~lly intersper~e with the main filament trand~ serving a5
the core~
.
In ~ preferred embodiment Qf the thr~ad ~cc,fdin~ to the -
inventi~n~ the l~ops ~nd ber.ds ~f the main fil~ment str~ndts~ ~ .
t:hat are formed d~ring swirlin~ ~;;ause th~ compr ssi~n of a ~ro~s--
. ~ . ~ .
section~l area clf the ~ posite rclulahly eqllival ~nt t~ thç? cr~s~-
secti~n~al ar~ ctf 'che unswirled thread comp~si e. Su~h a thre~d
`. ~ i5 par~icularly suitable ~or sewin~, sin~e lo~p ; ~nd bend~ a
.
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1330411
faveuY c~mp~r~ticln oS the thre~ s~rf~ce ~ r~cture th~t i 5
required in sewin~. Su~h a ~tr~ture h~w~ ver ~15.~ permits
s~fFi~i~nt ~mc.u~ts ~f cc~ler ~ir to penetrate the ~trand during
sewi ng .
T~e main filament strand~ can als~ be produc~d ro~ pol~amides or
polyester~ fea~uring meltin~ p4in~5 high~r th~n that ~f the
b~ndin~ fil~ent strand. It is parti~ularly ad~ ~ntagec.us if the
main filAment ~trands and ~r b~n~ing filament ~tr~nd~ feat~re a
hi~h ~ilament rount~ Lar~e numbers of fil~men s or Gapillarie~
pern~it mere effecti~ swirlinr~.
B~.~ndin~ filament strands ~nsisting ~f ~ op~lymer~ ~r m~r~
partic~larly a ~opolyamide, are particularly sui~ble in this
c:~nne}tic~n. The meltiny p~int c~f the b~hdins ~ilamerlt ~;tr2~nd~
whi~h in this case shc~uld n~t exceed that ~f he main filament
strand, can r~nge between 60 and 16~ ~ ~nd thus meet th~
requiremehts Gf di~feren~ applic,ations~ Tl ~e proportic~n of
eop~lyme~ ~sed as the br~nding fila~ent ~ependl ; upon the type cif
eOmposite required as well as ~he intended use. High propc.~ti~ns
o~ bondin~ filament~ prod~ce ~ s~r~n~ly bonde~ hr~d, while the
use ~f l~wer pr~p~rtir~ns ~ br~ndin~ filament p Omotes a te~;tile
~tru~ture i'n th~ thre~ c~mp~sit~ that i5 non~ heles~ quite well
: conglutinated~
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1330411
A pr~ce5s suitable fe,r prc~d~cinQ the pr4p~sed thr~ad ~nd lyihg
within the sc~pe o~ the invention invo ves uniting ~nd
songlutinating by heat treatment ~ne ~r m re main filament
~tr~nds with on~ ~r m~re m~lt - b4ndin~ fil~m n~ ~trands and i~
distin~uished ~y th~ .-omin~lin~ ~f the m ltifilament main
filament str~nd and ~he multi~ ent bondi g fil~mRnt ~trand
sa~s~d by airstre~m t~turing an~ the subsequ nt he~t treatmerlt :
of th~ integrated thr~ad comp~site~ ;~
~hile l~.~ps an~ bends 4f the main filament stra d and th~ b~din~
filament strand are at first di-tributed by a rst~e~m texturin~
thr4~gh ~he cross secti~h of the threa~ comp4 ite1 the fil~ment
thre~d c4mp~site i5 l~er shru~k under h~aa treatment ~hich
sh4rtens the l~c~p~ an~ bends. ~he b~ndiny act s~n ~f the bonding -.
~ ments is simultane~s~y insti~ated by eat treatment at
temperatures equivalent to th~ meltin~ p~i t ef such b~nding
filament~ te~sile stressiny ~c~uring in th thre~d c~mp~site
duYing heat treatment pr~mot~s dur~ble and c~mp st cs~ngl~tin~tie~n
~inc~ the bonding process involves th~ re~sure--ini'Giated
cc~nglutin~tion of the strands. 5ingle ~trand~ c.r simple strands
:: prr~lduced by air~;tr~am texturin~a ~ccordiny tc~ t le propcised methc~d
achieYes properti~s th~t are at le~9t ec~ual to hc~se p4ssessed by
simil~r twist~ iewinS1 properti~ conf~re ¦ by the proposed
~: method surpass those tlf conventiona~ thre~ds.
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In ~n~the~ variation ~.f the pr~posed meth d, main filamertt
stran~ ~nd b~ndin~ filament st~a~ m4ve al ny at pr~a~v~nce
speeds ~ef~re ~uch str~nds are fed int~ the a rstream texturin~
device. Suc~ pre-advancing cause~ the feed velo ity to exceed the
rem~v~l velc.city and ~n ~e s~lectively empl~y d f~ he purp~s~
~ ntr~l 1 ing the sh~e ~nd ~i~e of l~ps and ~end~ formed
during the airst~eam ~ext~ring sta~e.
A variatlon of ~uch a pro~ ~ompri~e5 s bjectin9 the main
filament strand ~ç. ~ ht preadvan~e~ where y the individual
~lements ~re cau~ed only to separate f~m e~ch ~ther~ whil~
~ubjQctin~ the ~rldin~ fil~ment str~nd t~ ~ hi~her preadvançe
~ate. Thus, alth~u~h the irldividu~l fila ent~ c~f the main
filament ~tr~ndCs~ will ~,nly sepa~ate when subj ~ted t~ ~irst~eam
texturing, such filaments will essenti~lly ret in their parallel ~
orientation ~ithout the f~rmati4n 4f loop~ c,r bends~ whi le the ~ .
individual filaments of the bonding filame strand featuYin~ ~ -
hi~her pYeadvancE YateS will be ~lown aterally to the ~ :
lc~n~itudin~l thread direc~i~n and be dispe ~d betweer~ the
j h~i Vi dual fiI~ments ~f the main filament strand~ 5~ . The
indivi~u~l fil~l~nts of ~he m~ih filament tre~nd~s~ are then .
cc~n~lutinated in the f~ win~ b~ndin~ s~ep.
. ~ ~ . i
A variatiorl of su~h a pr~c~ss wo~ld involv~ th employm~nt of a
furth~r main ~il~ent strand bein~ preadvance ¦ at a hi~heY rate.
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1330~1i i
~uch main filament str~nd, which can, fo~ exam le~ b~ ~n effect
filam~nt str~nd~ fo~ms, lik~ the bondi~g fila ent ~tr~nd~ lo~p~
and b~nds ~p~t:le -f penetr~in~ be~ween the in i~idu~l fibrea; ~.f
tb~ ~ther filam~nt str~nds t~t adv~nc~ at th lo~er prearlvan~e
re~te. In khis malnr-er~ th~ pt~p~sed pY~e 5 ~an acilie~e a
cc.r~?~ef fect stran~ ructure e~;hibiti n~ ef fe~ti e bc~ndin~a
Anc.t~er variation ~f the meth~d involves pre d~ancin~ the main
filament str~ncl and the l~onding filament st~a d at rou61h1y the
~ame r~te, whereby th~ individua~ fi~aments ~f the main fil.~ment
str~nd are evenly swirled t~ether~ S~ch ~n arran~ement also
prom~t~s the c~evel~pment of c7 ~o~p structure in the main fil~ment
stran(i which f~ster~; p~rtic~dlarly effractive con lutination.
.
An especi~lly advan~ageous emb~.di~e~t of the rc,p~sed m~th~d is
c~istin~Llished by the stretchin~ c~f the swirle thread composite
bef~re heat tre~tment. The stret~hin~ step imm diately f~11c~wing
airstrearn texturin~ prevent~ the 140ps ~r~d berl ~i to be sh~rtenecl
and shrunl~, and thu~ prc.nnc~te~e ful~ther cons~lida icr7 c~f the thread
cc~m~ si~eA This emborJiment fav~urs ~onsolidat ~n ~f the surface
~tru, t~lre c,f the ~hre~d ~mposite whi~h i ~it 1~ impc,Ytant in
pr~du;: i ng sewi ng thr~?ads~
. ~ ~ .
Fi~ lly~ in a ~urther em~odiment of the pr pt,~ etl~i d~ tl~e
thread ~c~mposite i5 c~led ~ff after heat treat nent. This
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~33041~
ccll~ling ~tep, which immediately f~llc~ws the cc~n~lutin2~ic,n ~
b~:.ndihg ~3tep~ serve5 t~ accelerate the bc.ndin pr~ess and the
ha~denin~ ~f the bond thus pr~ .
Even thc~uQh the strRnd need n~t be twi~it~d at all On a~ unt of
the imprs.Yed t;~ndability ef the prc~po5ed str cture~ a further
~n-bodim~nt flf the prc~se~ metho~ can c~mpri e a twi5tin~ step
p r i or tc~ h eat t reatment. 5uch ~wi~ting can e ar C s~mp l i sh~dl b y
employing a false twi~ting procedlure 4~ ~y mea s ~f twi~ting and
subse4u~nt ~d~i~i~nal prc.~essin~ in a separ~te perati~n~
Alternatively, an~ther variati~n inv~lves the o~t-procee~ing ef
the str~nd, in ~hich the ~1eat treated th ead c.:.mpcsite is
twisted.
~`,''
~n ~ppa~atus fallin~ within th~ scop~ ~f the inventi~n t~lat i~
suitable f~r implementin~ ~he pr~pos~d meth ~d featuYes ~r, its
entry side an airstr~am text~ing device that s n ~e fed with e,ne
4r ~re multifilamènt m~in filam~nt strand 5 and c,ne cr mvre
n,ultifilament and b~nding fil ament st r and~ and a ~ettin~ device
l~cated db~nstYE~m ~ sush ~irstream tex~urir ~ device~ in ~hich
6ettin~ ~evice the ~ondin~ activity of a ~c.nding filament
featuring a lc~er melting p4int than th~t cf he main fil~ments
can be ihitiate~ y the heat tre~tment ~f al eady~ nselidated
len~ths s.f thre~d c~mpc!sit6? issuiny ~rQn~ the e irstream texturin~
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1330~1~
devi ce.
The prmpr~sed device is ~naYked by a simple d ~si~n and can be
e~sily cc~ns~r~lcted with c:~mpenents of cenv ~ntional airC;tYean~
devic~s. Th~ pr~pc.se~l de~ n cc~ntribut~es to pr4blem--fr~se
~per~tic~n ~nd incre~sed pr~uctivity
In an advant~ec.us embodimen~ of the pro ~ased ~pparatus,
pre~dvance system i- inst~lled ups~Fe~m an~ c~n ~he entry side c~
tlle airs~ream textuYirl~ device. Thi~ pr~adva lce system permits
the selective contrc,l of the speed at whi :h the ihdivdual
filaments are advancedA Becau~s~ the sp{eed wf a ~v~n~e of the l-)~in
~nd ~on~in~ fi~ment strands can be adjust ~ as the latter
adv~n,-e in the direction ~f the airstream textu ~ing device~ it is
~c~ssible t.-, ~lter certain str~nd charact~Yist c~ in conformity
with di f ferent applica~ions.
~ trusturally a~vantayeous i f, in th s cennectien, the
pread~ance ~ystem for e~c~ main fil~ment stra ~d features two
pairs ~f pinch rollers installed in serie B~ whc,se oper~tir)g
s;peed 5 '_ ~n be adjuste~- 5uch a simplified c~~~n ,t YUCti ~n n~:~t s~nly
permits the matchin3 ~f the advancement ~r pre 3dv~ncement speeds
c,~ both main ~ilamç?nt s~r~nds m~vins~ in t~e ~iirectic.n of th~
te~turing d~?vi~e~ but 2~1sc~ allows th~ main fil~ nent st~ands t~ ~e
st~etched~ if required, between the seria~ ly-inst~lled pinch
rc~lleY pairs that serve to ~uide such m~in fil~ment stran~
S~c h stretchin~ is Qn the cne hand necessary wh enever preoriente~
mai~ filament strancis ~F!OY strands~ are bein!a used, in c~rder t~
~btain the final stretchiny re~uired. AnGth~ ~ purpc~se 0~ 5~lch
stretchin~ i~ t~ stretch the ~,ain filament str an~s prior to heat
tr~a~mer~tt whic~ pre~i~po~es ~hem ~o ~hr~nk~e.
I~ e. preferred emb~diment c.f the prc~pc sed ~ppar~t~s, a
stabili~iny de~ice i5 installed between the a irstream te~turirlg
device ~nd the s~tting device in ord~r t~ 5 tret~h the thread .
composite i 55Lli h9 from th~ ~i r ~t r ea~ t exturin y device. 5~-;h ~n
~rrang~ment permits the pr~posed apparatu~ t~ stretch the thread
and produ~e a th~ead ~tructure wh~rein th e lc~'p5 and bends
produced during th~ airstre~m texturin~ pY~ce5~ are sh4rtened and
shr un ~; .
In this c~nne~tion~ it is con~eni~nt frc m the struct~ral
vi~wpoint for the stabili~ing devi~e to feat ure twcl pairs of
pirleh roller~ lo~ated ~t ~ di5tance from eac ¦ other in the feed
direction, of ~hich th~ pinch rc~ller pair arrar ~ed d~wn~tream in
the feed dire~ti~n ~eatu~es ~ hi~her cc~nve~ in~ speed tl~an the
pinch rall~r pair ~3rr~nged upst~e~m~ Such ~n arr~n~ement
p~rmits the thr~d c~mp~site t~ ~e momentaril~ 2~rrest~d ~y each
o~ the pin;:h rc~ller pair~; ~n:i simultaneou51y c tretched by vir'Gue
1330~11
-12-
of the differing advancemen~ speeds exhibited by both roller
pairs. Because the stabilizing device is arranged upstream of
the setting device, the downstream pinch roller pair of the
stabilizing device is also able to act as the entrance to such
setting device and serves to set the length of the thread before
it enters the setting device~
The cooling operation forming part of one embodiment of the
proposed method is facilitated by another design of the proposed
apparatus, wherein a cooling device is installed downstream on
the exit side of the setting device. In this case, it is
particularly suitable if the cooling device is arranged between
a pinch roller pair located on the entry side and a takeup device
featuring a pinch roller and a takeup roller. This pinch roller
pair located on the cooling device can, for example, be formed
by a pinch roller pair arranged on the exit side of the setting
device. Such a pinch roller pair is able to determine on the
exit side of the setting device the length of the thread
traversing the setting device and to control on the entry side
of the cooling device the length of the thread to traverse such
cooling device.
.
In a broad aspect, the present invention relates to a method for
producing a sewing yarn in which at least one multifilament main
filament yarn is swirled with at least one melt-bonding
multifilament bonding filament yarn by airstream texturing and
thereafter respective fixed lengths of the swirled yarn composite
are bonded together by a heat treatment initiating the bonding
~ 133~
-12(a)-
action of the bonding filament yarn, characterized in that the
swirled yarn composite is stretched prior to the heat treatment.
In another broad aspect, the present invention relates to an
apparatus having an airstream texturing device which can be fed
on the entry side with at least one multifilament main filament
yarn and at least one multifilament bonding filament yarn and a
set~ing device which follows the airstream texturing device and
in which the bonding action of the bonding filament yarns having
a lower melting point than the main filament yarns can be
initiated by a heat treatment of respective fixed lengths of the
yarn composite adapted to be fed from the airstream texturing
device characterized in that between the airstream texturing
device and the setting device a stabilizing device is provided
for stretching the yarn composite supplied by the airstream
texturing device.
~: :
In another broad aspect, the present invention relates to sewing
: yarn comprising at least one main strand formed by a
multifilament main filament yarn and at least one bonding strand
formed by a multifilament bonding filament yarn which is swirled
with the main strand, is melt-bonding and is supérficially melted
or fully melted in the yarn composite for the bonding thereof,
characterized in that loops and bends, formed by the swirling,
of the main filament yarn or yarns which are unmelted in the yarn
composite are contracted, seen in cross-section of the yarn
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1330~1i
-12(b)-
composite, to a size corresponding substantially to the cross-
sectional size of the unswirled yarn composite.
Further distinguishing features, details and advantages of the
invention are revealed by the following description and drawings.
Referred to are all details of the invention not treated in the
-
1 /
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l~l33o~ll
t~ t~ ShGwn are:
~r~wins 1 an appar~tu~ itabl~ for im lementin~ ~a rnethod
~uit~ble fs~r pr~dusing a thread ~mposi~e fYom tw~ main fil~ment
~trar,ds and one bonding fil~ment strand, shuch an app2,ratus
feat~lring an e.irstream t~axt-\rin~ d~rice and ~ etting device.
~rawir~g ~~ an ~ppli~ti~n of the app~l~atus of ~ ~Yawing 1 SUite~le
f~Y producin~ ~ ~hread c~mp~site f~4m onl one m~in filament
strancl and ~ ~ondin~a filament ~tr~nd.
ln Dr~win~ 1, a~ app~ratu~ suitable for produ~ n~ a sewin~ thread
fea~:ure~ a pread~an~ 5y5tem 1 whi~hl in the embodiment ~xample
illustrated~ c~mprises three p~r2llel feed paths for t~lree
filament str~nds tha~ ~re to ~e united n a sin~le ~hYead
romposit~. The number ~f feed p~ths indicated ~an v~ry accr~rding
to t-he embodiment. There must, hc,weYert be at l~a~;t tws~ feed
p 1~ t tl g r
..
: Multifilament main filament ~trand ~, whi~ h thu~ fea~ur~ a
plur~lity of single fll~ments and ~eYyes ~c the sore, i5 drawn
fr~m a 5p~1 3 an~ runs ~on~ one o~ ~h~ feec paths shown. The
feRd path assign~d t.. main filamen~ ~trand, fe2~ures two pinch
~c~ r pairs 4, 4' installecl in se~ ies in the feed dire~tic~n~
through ~hose Rin~h 9~1R main f~l=mont stra,nd ~:2 is permittod t:o
~ ~ .
-14-
l 1~30~11
r~ln pra.:ti~:~lly without slipFIin51~ The s~r~nd 5 then advansed by
a p~.wered pinch r~ler pair 4~ further similarly desirgned
feed p~th accclmcl~:la~es a further n~ultifilar ~ent main filament
i~' stran~ se~vins;~ as an effect ~nd is drawh ~ f frclm a spo~l 6.
,
i~Qference numbers 7, 7' d~ n~te the pinch r~l ler pairs as~igned
i.......... t~ tlle~ feed path ~ main ~ilament str~nds 5 such pinch roller
'.`:
~, p~irs corre~ipclndiny to the pinch r~ller p~irs , 4' ~ the feed
, p~th ~f rnain fil~ment trand ~. The third ~ ~ p~th is designecl
t~ ~c~._.modate~ ~ mul~ifil~ment b~ndins~ filament trand If' th~t is
. ' dr~wn fr~n- sp~ol 8t whE~reby ~nly a ~inyle, pc~ ered pinch )-c~l ler
.! p~ir ~ is installesi~
.,,
The ~-dvar)~:erne~nt speed ~f pinch r~ller pair 4, ~ ~f main
fil~ment ~trand ~ can be aldjusted independen ly QS ~a~ h otller,
wl;ich pE~rmit~ the ~ipe~d ~f the downstream rc~ll Y p~i~ 4~ t~ ~e
iri.-r~.~sed beyond ~hat ~f upstream rc,ller air 4~ and n~ain
filamellt str~and ? t~ be stretched t;letween pinc roller p~irs ~
4'. T~7e ~peeds ~f pinch rGllers 7~ 7' can simi arly ~e adjusted,
thu~ permittiny m~in filament str~nds t~ be st etch~d. ~nding
fil~ent str~nd 1~ is, ~y contra~t, nGt tG be ~ ret~hed.
: ~ ,
, Th~ stret~hin3 oper~tion thking place ~eween F inch roller pairs
~, 4' or 7, 7' can ~e a cold stretching ~perati ~n preparat~ry t~
a subseq~l~rlt shrinkin~ st~p. When pre~rien~e~ ~Ir maln filament
st r ~nds ~r e empl oyed ~ e hot st r et ch i n~ pr ~ c ess i ~ r eq~i r ed i n
:
. ~ - 1 5-
1330411
~rder to imprc.ve clur~ability anc7 faci1it.3te f inal stret~hing Gf
the P~IY maih fi1amerlt str6~nd~
Preadvance 5y5te~ 1 f~eds b~ndin~ filament str~ nd 1~ to airstre~m
te~turing devi~e 11, in whi~h fil~ment stran d5 ~ 5 and 10 are
combined into ~ ~in~le thread ~c~posite and sw irled t~get~er by
th~ air~tream prclduced by the te~buriny nc.~ zl~ lo~ated inside
airstream texturing device 11~ ~in filament strand ~ wl~ich
act~ ~s the cr-~re~ is rur~ thr~uyh wat~r bef4r e beiny expc:~sed to
the ~irstYeam. This ~wiYlin~ method i~ well n~wn and nr~ed n~t
be discusseL7 any f~lrther in this disclos~re. I t sh4u1d be n4ted~
h~wever, ~h~t pinch roller p~irs 4', 7' and ~ can, depending c.n
the type ~f swi~lin~ r~ir~d~ be adjus~ed t sp~rific rat~s c.f
pread~ance speed~ Swirlinc in th~ textu i~ no~1e ~au5~
bonding ~ ment st~and 10 ~nd main filament s~r~nds ~ and 5 to
c.~mbine and intec~rtwine~ whereby 1GOP5 and ben 5 ar~ produced in
the individual filament~ duriny ~he swirliny p ocr~cs.
~ '::
The n,ultifilamer7t m~in filament strand ~ theAt ~erve~ ~s t~e cc~re
can .Also ~e ~dvanced~ fo~ ~xample~ by means ~f pin~h ro11 er pair
4' of air~tre~m texturiny device 11 eAnrl ~y me n~ a Yelativ~ly
~;1i5jl,t F;rec.dvarlce sufficir~rt to ~ause th~ indi iclual fil~m~nts c,f
main fil~n~ent strar~d ~ ~c~ separ~e~ whereby on the ~thrs7~ hand
ma.ir- ~i lament strand 5 serYing ~5 the effect is arlvanced at a
r el at i vel y hi gher r at e o f pr e-ldvanc e . Thi s p~ c~c es~ c iiuses l oop s
,~
~; :
1330411
~nd bends t~ form basic~lly c~n the individu~l filaments c~f the
~ain filament ~trand acting as the ef~e~t w~ le ~he l~ps ~nd
bend~ penetrate the cross s~cti~n of ~he e~ enti~lly parallel
irldividual fila~ents ~f main fil~ment ~tra d 2 serving as the
coYe. B~nding filament str~nd 1~ c~n be adv nced ~t a rate of
pread~an~e ~qual t~ ~r hi~her than that of ~ai filament strarld 5
! th~t sefves ~5 the effect, for the purp~s~ G achieving ~ mGre :i.
ir,terlse ~i~tribution ~f it~ individual fil~m nt~ thro~gho~t the
, .r.}ss serti4~ c.f main fila~nt strands ~ 5. ltern~tively~ m~in
, filamer.t str~nd~ ~, 5 can al5~ b~ ~dYanced at ~he ~ame high ra~
i bf p~eadvanre~ whereby beth main filament 5 r~nd~ ~, S ~an be
bl~wn k~yether m~r~ ~r less evenly. :~
- A stabilizin~ ~evice 1~ loca~e~ d~wnstr~am Gf irstream texturing
d~vice 11 ~nd servin~ t~ stabili~e the t re~d c~p.-site 13
f~tur~s tw~ pinch r~ller pairs 14~ 14' lo~at d in serieC in the
; ~eed ~irecti~n and b~tween ~ach Qf wh~se pinc gaps i6 conveyed
;~ thre~d c~mp~site 1~ pr~ctically with~ut slipp~ e. A slave rc~ller
15 ~ituated between r~ r pair~i 14~ 14~serves merE!ly t~ redire~t
the lenr~th clf ~trand stret~hQd t~at~eer~ rc. lers 14, 14'. The
ad~an~-ement speed ~f downstream situated pinch r~.~ller pair 1~ is
: adjusted highe~ than the ~dv~ncement ~=pee ~.f the upstream-- :
sltuatE~d pin~_h r~ller p~ir 1~, which determ nes the speed L~t
: whi~t-, thread ~mp~site 1~ ~ken up fr~ irstream te.~tur~nr~
devir:e 11. The ~hr~ 4mposite 1:~, alrE~dy t xt~red ~y the
~ ' ~ ,'
,~ .
~:
l~
, -17
.. . .
i 1330~
. air~tream prcc~dure, i5 thus F.tretched to th~ E ~tent per~itted ~y
i:. the advancement ~pee~ ~elected~ ~hereby the 1l ,~ps and bends a~E
¦' red~ed and partially dr~wn t~ether. This p ~cedure causes ~he
tl~re~d ~ pcl~itet which cc~mprises m~in filamen str~nd~ nd
bc..nding filament s~r~nd 10, tG densi fy.
~:
After leavin~ pin.~ r~ller 14, the uncompre~s~ ?d thre~d cc~mp.-site
enters settin~ device i~, at whose e~it sid~ t~ le th~ead comp.~site
~j is Yedire~ted ~y a slave rc~ller 17 thr~u~h p n~h r~ller pair 18
~hi~h ~efve~ uide and advance ~uch thr~ad o~pesite. A lleat .
tre~tment pr-~cedure takes plac~ in ~ettiny d~ ~vice 1~ antl causes
maln ~ilament strandei :~ ~nd 5 t~ shrink, s~ h~t the len~atll c~f
thYead c~mp~site h~ld ~etween rc~ller pairs 1~ ~ and 18 under~es
~ tensile t~s5in~. The m~ynitud~ ~f ~ch ~en! ,i~n is determined
: ~y adju5tin~ th~ a~van~emen~ speed ~f pinch r~ ;.ller pairs 1~' ar,~
. 5~ch heat~-induc~d s~hrinkage can in this ~ase in~re2~se the?
~dvancemen~ sp~sed of pinch rc~ pai~5 14 ~l ~y4nd th~t clf pin~
~` roller pair 1~ The temperature of the ht,~t t e2tment F~r~cess is
me~nwhile a~dju~ted nhtil the meltiny pQin of ~he b4ndin~
fil~ment stra.^ld 10 ih ~he str~nd cclmp~site is re~ch~ l, whereupon
the t~nding fil21n~nt straed melts~ in contrast with main filanlent
.trands A7 ~nd 5, ~hich feature hi~her meltln~ ~l~ints. Th~? entir~
thYeaCI ccmp~site is n~w subjeeted t~ tensile 5 tl-ess. ~rri~d c~ut
urlde~ ten~ile s~ the ~ n~lutinati~n p~ Ge ,5 is imp4s~ad upon ~:
the ~mewhat bulky thread co~nposite 13 leavin a the air5tream
:
' ~` :
R, ~.,.'. .' ', '.' .'. ~
R ~.; . ~ ~: . .~ ~ ' i ' ~ ' . ': ; . ~ ` ' ~' . ' ,. ` ~ ; '
' -18-
I ~ 13304~1
~, te~:tllring clevi~ e S1~ and pr~du~ ; an eff~ct ~ely b4ndiad thYead
` c ~rl~poF.i te~
I'
L~c~ted d~wnstream ~f th~? exi~-side pinch rolle~ pai~ 1~3 clf
s~ttihg deYice 1~ are sla~e ~uide rolleYs 1~ ~c~ that redireçt
the thre~d comp~Site tC~ a t~l;eup roller 2~ tha~ ; ,_~op~r~t~3 ~i th ~
pinch r~ller ~1. A co~llin~ devi~e :23 i5 arr, In~ed b~hind pinch
rc~ller pair 18 i~ the ~ne travers~ by tl ~e thre~d c~mp~r.it~
between pinsh r~ller pair 1~3 and tt~e pir7ch ~- ~p e~istin6~ b~t~een
pinch r~ller ~1 and ~keup roller ~. The thread~ in pa55iny
alc~n5~ this ~c~ling device ~:3, i5 co~led of f ~lr the pLrpose of
a.celeratin51 ~74ndirl~ an~ 'Ghe t-ardenin~ c~f the t7c,nd The
de3~ri~ed ~peratin~ sequence ~154 ~ffords a vil ~ ~f the structure
of th~ ~wirle~ ~hr~d cc.mp~.site 13 a5 it 1~ ~ave~ the air~tream
te~xturiny device~ S~lch a ~wirlin~ prc~ess pr' ~d~ces in filarnent
strands -, 5 ~and 10 lo~ps ~nd bends th~ lt are then able to
pene~Yate ~he thread compc~site irl the direc tic~n ~f itC- cr~
section ~nli thus pr~du~e ~ ~o~newhat irre! ;ula~ ul~:y thread
~ompc-si~e ~uYface. The he~t pro~ess th~t tahe , p1a~e in setting
devil e 1~ c~u~se~;~ on the other h~nd, th~ ~ e::sternal SLll' f2:;ce
stru~tur6? ~f the tllr~ad composite t~ sleni fy. 1 ~ can be çlat~lered
fY~m the overview c~f the prc~ces~, ma~n fil2~ml ~nt strands ~:~ 5 of
the finish~t:l thr~ad composite feature n~ mutua I twisting.
;'~
, ~: Dre~wing ~ p~serlt~; ~ pr~cess suit~ble f~r U5e in the proposed
''~
,~
-
~:
. 1~30411
d~vi~ e if nnly ~ sins~le multifilament main t'i '~m~nt sttrand 2 i~
tc~ be ~,-,mbined ~ith a single b~ndin~3 fil~ment trand lC). In this
prc~ ss t1)e fe~d path defined by pin~h r411er p~irs 71 7~ is nc~t
used~ This prpc~ss ~15c~ p~rmits the 1-5~? ~f Y~rying rates ~f
pre~d~n~:e f~ main filantent st~and ~ and b~nd ng filamen~ str~nd
~0. i~lair, filam~nt stt~nd ~ C~h~ for exampl ~ be fed with a
r~latively slight preadvance sufficient to pr~ ke the mlltual
eparatis,n ~ its indiYldual filamen~ t n exp~s~d the ;
a..rstre~R~ in texturin~ de~ice 11~ while t~ e ~n~ing fil~ment
strand l~ under~es preadvahce suffi~i~nt tG f rm lCI~p5 and ~end~
in it~ indi~idual filament~ Thus~ bc~n~insa fi ament s~rand 1
~n b~ distri~uted ~hr~lugh~ut t51e sr~ss secti~. s~f ~n~in filam~?nt
stYand :2. Alt~rnatively~ main filament s rand ~ and b~jr~din!a
filament str~nd lC1 can ~e advahced at appr~xim t~ the same r~te
-.f preadvan~e, ~n c,rder f~r the l~c:ps and bend ~f the indi~id~
filamertts clf ~he main filament strand ~ an b~n~ing fila~,ent
~;trand 1~ to intermin~le. Main ~ilament st and ~ and bl~ndin~
fil~ment st~ ~,nd lt: can, in ~ontrast tc, the ~pera,tion eihe,wrl in
D~^awing ~, ~e guided par~,llel to e~ch other th c,~ h the air~.tr6?am
te.~ urirlg ~evi~e by means of a ~in~le pin~7 r ler pair. ~ ~.
~.: '
-.
As can be 5e~h in the operati~n se~u~nces illu trate~ ~y Drawings
1 and 2, the t~-read cc~mp~lsite d~es n~t und~rg twistin~. Sl~u~d
twisting however be desira~le~ the thr~,d composite alrea~y
n~lutin~t~ in settin~ device 1~ ~an be twi teJ in a separa~e .
' ~:
.,
~, ~ ~.,.. X. ., . ,~ ~ ` ' `
~4 :~ ~, :~ ;~ .:: ~'` ` . ` . : ` i' ;
1330411
proseC.~ foll ::.win~3 ~he des~riberi s~p~r~ti4n. l ~lteYn~tive:ly~ ~nce
the ~tr~td h~s left airstream tes~turins deYic 11 ~r st~bili~in~
~, de~ e 1~, it can b~ bGnded in a separate p~r~ti~n in ~hic~-,~; bondin~ is trig~ered. ~t is fin~lly alse p~ ~ibl~ tr~ aYt a
~15E twist t.:. sush thread as it traverses set in~ ~;ievice lC'~.
Ar~,~,fdln~ tr~ the prec~eding dEs~..ripticn, the ~ole pre~-c~nditior~
fsr the effe~ti~re GpE~ratic,n of the meth~d implemented o~ the
dE~cribed app~r~tuB i5 that th~ bGndin~ ~il me?nt strands C10~
fe2~ture a l~wer n~ in~ F:~int than the m~in il~mer,t str~nd~Cs~ -
~ ~. Regar~ing the ~h~ic~ of materi~ls in parti~ular~
g ~c~;~lymert mc~Ye p~rti~ larly ~ ss~ps~ly~mii~e~ 5 ciuld l~e ~onsideYedthf~ bondin~ filament str~nd~ ~he meltin~ p int of the b~mdins
filament str~nd~ ~h~uld lie between 60 ~ d ~ OC. For the
~ p~lrp~;e ~f the pr~ nt ~pe~ati~n, th~ m~i filament str~nds
;~: should ~on~ist of polyamide ~r p~ly~ster. ~ n ~ ment ~trands
fe~turil1s ~ ~iyh fil~ment ~ount ~e parti~ ~rLly suit~ble, a~
` ~hey permit the producti~n ~f num~rous loops ~nd ~ends ~nd thL~s
the a~hi~vernent o~ a particul~rly sc~lid thr~ad comp~site~
'
.
.
: ~:
~ ~ ~ `
,,~:"-:,
:~ ~
; ~ :~
,~ ~
-~
