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ResearchonEvennessofWoollenCashmereYarn

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ResearchonEvennessofWoollenCashmereYarn

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    Res e a r c h on Eve n nes s of Wooll e n Ca s h me re Ya r n

    3 ( ) ( ) ( )XU Xi a n2l i n 徐先, HUAN G Gu , L I Pei2l i n g

    S c hool o f Te x t i l es , T i an j i n Pol y tec h nic U ni ve rsi t y , T i an j i n 300160 , Chi na

    Abs t r a ct : Pa r a met e rs i nf l ue nci ng t he e ve n nes s of t he me t h o d of n o n2li ne a r a n al ysis w as us e d t o ge t t h e woolle n c a s h me re ya r n we re a n a l yze d , a n d f if t y ba t c hes of qua nt i t a t i ve r el a t i o ns hip be t w e e n ya r n e ve n ness C V val ue ya r ns wi t h f i ne nes s of 38 . 5 t ex we re us e d t o s t u dy t he a n d r el a t e d i n de xes . A n d t h e mai n f ac t o rs t h a t i nf l ue nce d q u a li t y cont r ol p a r a met e rs i n rel a t i on t o t he e ve n nes s . t he ya r n e ve n ness C V val ue w as f ou n d . Th r oug h s t a t is t ic al a na l ys is , t he models of ya r n e ve n nes s

    we re buil t . Mor eove r , t he rel a t i ons hip bet wee n t he eve n nes s Exp e ri m e n t al 1of sp i n ni ng ya r n a n d r ovi ng ya r n w a s als o i nves t i ga t e d . The

    res ul t s s howe d t h a t a p os i t i ve cor rel a t i on e xis t e d bet wee n 1 . 1 Mater ial s and equipments t he m , a n d t he a mou nt of t hi n p l a ce p e r kil omet e r w a s t he Cas h me re use d i n t he rsea rc h was p r ovi de d by Er dos mos t i mp or t a nt f a ct or w hi c h coul d i nf l ue nce t he e ve n nes s of Cas h me re Co. , L t d. P R Chi na . The t e nsile st re ngt h of t he woolle n c a s h me re ya r n . The i nf l ue nce of t he a mou nt of nep s () cas h me re is 3. 4 ?0. 2cN , t he a ve rage dia met e r is meas ure d a n d t hi c k p l a ce on t he ya r n e ve n nes s w a s i n dis t i nct i ve . The 15. 45 μm , el ongati on at brea k is ( 4 ?0. 05) % , moist ure concl us i ons obt a i ne d woul d be helpf ul t o i mp r ove t he p re2 () regai n 19 ?1% , a nd s h ort f i bre c ont e nt is less t ha n 12. 5 % . cont r ol a bili t y on ya r n e ve n nes s .

    Sp i nni ng c onditi ons : ya r n c ount is 26 N ?m , t e mp e rat ure Ke y wo r ds : w ool le n c as h me re y a rn ; y a rn eve nness ;

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    Document code : A e mpl oye d duri ng t he p r oducti on a re list e d i n Ta ble 1. CL C n u m be r : TS131 . 9

    ( ) Article ID : 167225220 20090520522206 Table 1 Pr oc essi ng p a r a me t e rs

    Equip me n t Co n t r ol p a r a me t e rs Int r o d uc t i o n W o ol oil : F X2K902 B le n di n g M O N T EL EO N E Μi xi n g f o r t w o t i m es U ne ve n ness w as o ne of t he m ai n p r o ble ms i n t h e Fee di n g a m ou n t : 440 g/ h op p e r p r o duc t i o n of w o olle n c as h me r e k ni t t i ng ya r n . Af t e r Fee di n g f r e que ncy: t i m es/ 84Ca r di n g O C TI R p r o duc e d , li t t le w o r k c o ul d be d o ne t o i mp r o ve t he ya r n Roving y ra n count: 20. 8 N ?m e ve n ness i n t he f oll owi n g p r oc ess es . T he r e w e r e n u me r o us [ 1 ] Ya r n c ou n t : 26 N ?m .f a c t o rs i nf l ue nci ng t he ya r n e ve n ness T hes e m a y Tw is t f act o r : 17. 69 B I GA GLI i ncl ude d : t he f i ne ness va ri a t i o n of t he f i b r e , t he e ve n ness Sp i n ni n g D r af t r a t i o n : 1 ?1. 25 M o del B5 a n d s t r uc t ur e va ri a t i o n of t he r o vi ng ya r n , t h e d r af t i n g M ec ha nical ef f icie ncy: 80 % t e c h ni que d u ri ng sp i n ni ng , t he f a ul t y ma nip ul a t i o n d uri n g

    A U TO CO N E R p a c ka ge wi n di n g as w ell as u nwi n di ng et c . Wi n di n g m ac hi ne M o del 338 Th e ya r n e ve n ness c o n t r ol w as a c o mp r e h e nsi ve

    M U R A T EC t e c h ni que , a n d i t m a y i n v ol ve va ri o us p a r a me t e rs , s uc h as D oubl in g f r a me M o del N o . 283 t he q uali t y of t he r a w m a t e ri als , f i b r e bl e n di ng p r ocess ,

    p r oc essi ng p a r a me t e r va ri a t i o n , w o r ks h op c o n di t i o ns , M U R A T EC Twis t i n g di rect i o n : S D oubl in g a n d M o del N o . 373 e q uip me n ts , s kill of w o r ke rs , a n d f i ne ness of t h e p r o d uce d t w is t i n g f r a me Twis t f act o r : 9 . 23 ? [ 2 ] .ya r n Tr a di t i o nall y , p a r a me t e rs c o nc e r ne d t h e ya r n

    e ve n ness w e r e o nl y c o nsi de r e d , b ut t h e r el a t i o ns hips a m o n g All t he p a ra met e rs list e d i n Ta ble 1 we re base d on t he l ong t he f a c t o rs w e r e h a r dl y t a ke n i nt o a cc o u n t . I n t his p ap e r , ti me w or k exp e rie nce , a nd it might be rega r de d as t he t he n u m be r of t hi n p l a ce , t hic k p l ac e , nep s , a n d ya r n op ti mum selecti on f or t he 38 . 5 t e x cas h me re ya r n c once r ne d. ( ) e ve n ness C oef f icie nt of V a ri a t i o n C V val ue w e r e all

    1 . 2 Data collect ion c o nsi de r e d as t he i mp o r t a nt f a c t o r w hic h mi g h t i nf l ue nc e

    Th e i ns t r u me n ts , M o del YG136 Ya r n Eve n ness t h e ya r n e ve n n ess f o r w o oll e n c as h me r e k ni t t i n g ya r n . Th e

    3 R ec ei ve d da t e : 2008211225

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    ( )( )J o ur nal of D o n ghua Uni v e rs i t y En g . Ed . Vol . 26 , N o . 5 2009 523

    Tes t e r , M o del Y331A Twis t Tes t e r a n d M o del YG029 F I n ge ne r al , t h e c o r r el a t i o n be t w e e n t w o va ri a bles

    mi g h t be r e ga r de d as si g nif ic a n t l y if t h e c o r r el a t i o n Ya r n Te nsile Tes t e r w e r e us e d i n t he r es e a r c h , w hic h w e r e

    c oef f icie nt w as gr e a t e r t h a n 0 . 7 , as m o de r a t e if 0 . 3 - m a de i n C hi n a . Fif t y ba t c hes of ya r n s a mp les wi t h t h e [ 4 ] f i ne ness of 38 . 5 t e x w e r e bas e d o n t he p r oc essi n g . 0 . 69 ; as ne gli gi ble if less t h a n 0 . 3 p a r a me t e rs i n Ta bl e 1 . A n d t h e w o r ks h op c o n di t i o ns w e r e , F r o m Ta ble 2 , i t c o ul d be c o ncl ude d t h a t t h e C V val ue r el a t i ve h u mi di t y 65 % a n d t e mp e r a t ur e 22 ? f o r 24 h of sp i n ni n g ya r n e ve n ness a n d r ovi n g ya r n e ve n ness w as

    si g nif ic a n t l y c o r r el a t e d wi t h a c o r r el a t i o n c oef f icie n t of bef o r e t h e t es t .

    Ei g h t i n de xes w e r e us e d t o e val ua t e t h e ya r n q uali t y , 0 . 837 912 w hile r el a t i vel y less c o r r el a t i o n is n ot ic e d as w ell a n d t he y w e r e as f oll ows . i ts f o r t he C V val ue of r o vi ng ya r n e ve n ness a n d

    ( c o r r esp o n di n g t hi n p l a c e wi t h c o r r el a t i o n c oef f icie n t of Thi n p l ac e qua nt i t y of r o vi ng ya r n less t h a n 50 % of

    ) t he o r di n a r y ya r n , n u m be rs/ k m, X; 0 . 613 237 , C V val ue of sp i n ni n g ya r n e ve n ness a n d i ts 1

    ( Thic k p l a c e qua nt i t y of r ovi n g ya r n g r e a t e r t h a n 50 % c o r r esp o n di n g t hi n p l a c e wi t h c o r r el a t i o n c oef f icie n t of

    ) of t h e o r di n a r y ya r n , n u m be rs/ k m, X; 0 . 764 325 , r esp e c t i vel y . A n d t h e ot h e r c o r r el a t i o n 2

    ( N ep s q ua n t i t y of r ovi n g ya r n g r e a t e r t h a n 200 % of c oef f icie nts w e r e i n dis t i nc t i ve a n d t he c o r r el a t i o ns c o ul d be

    ) t he o r di n a r y ya r n di a me t e r , n u m be rs / k m, X; 3 c o nsi de r e d s m alle r .

    ( ) C V val ue of r ovi n g ya r n e ve n ness %, X; 4 2 . 2 Relat ion ship of evenness CV val ue bet ween ( Thi n p l ac e q ua nt i t y of sp i n ni n g ya r n l ess t h a n 50 % of roving yarn and spinn ing yarn ) t he o r di n a r y ya r n , n u m be rs/ k m, X; 5 Ta ble 3 w as t h e n o n2li ne a r s t a t is t ic al a nal ysis r es ul ts of ( Thic k p l a c e qua nt i t y of sp i n ni n g ya r n gr e a t e r t h a n t he sp i n ni n g ya r n C V val ue a n d r o vi n g ya r n C V val ue . ) 50 % of t h e o r di na r y ya r n , n u m be rs/ k m, X; 6 Ta ble 3 T he p r e cis e of t h e m o dels ( N ep s qua n t i t y of sp i n ni ng ya r n gr e a t e r t h a n 200 % of

    ) t he o r di n a r y ya r n di a me t e r , n u m be rs/ k m, X; 7 Fu nc ti o n L i ne a r L oga ri t h mic Cu bic Pow e r S Exp o ne nt i al ( ) C V val ue of sp i n ni n g ya r n e ve n ness %, X. 8

    R 0 . 844 . 821 . 848 . 831 0 . 815 . 842 0 0 0 0 Eac h da t u m w as t h e me a n of f o u r de t e r mi na t i o ns . Th e St d . e r r o r 0 . 086 0 . 503 0 . 471 0 . 038 0 . 039 0 . 037 da t a w e r e p r es e n t e d i n t h e ap p e n di x .

    w he r e R s t a n ds f o r s ys t e m f u nc t i o n a n d S s t a n ds f o r t h e 2 Re s ul t s a n d Dis c us s i o n r el a t e d c oef f icie nt .

    As se e n i n Ta ble 3 , t h e L i ne a r a n d Cubic m o dels h a ve 2 . 1 Correlat ion analysis a hi g h e r p r ecis e , s o t h e t w o m o dels w e r e p r es e nt e d i n of t h e v a r i o us d a t a T o e li m i n a t e t h e i nf l ue n c es Fi g . 1 . I n t e r ms of t h e St d . Er r o r , t h e L i ne a r m o del m a y ( )disc r e t e i n t h e ap p e n di x , e q u a t i o n 1 w as us e d t o be t h e be t t e r o ne . s t a n d a r diz e t h e c olle c t e d d a t a , a n d t h e c o r r e l a t i o n [ 3 , 4 ] c oef f icie n ts of t h e s t a n d a r diz e d d a t a w e r e c a lc ul a t e d

    a n d lis t e d i n Ta ble 2 .

     μ X - ij j( ), 1 Y= ij σ j

    w he r e , Y: t h e s t a n da r dize d i n de x ; ij

    X : t h e u ns t a n da r diz e d i n de x ; ij

    ( ) i : t he n u m be r of t he ya r n i n de x , i = 1 , 2 , , 7 , 8;

    ( ) j : t he n u m be r of ya r n ba t c h , j = 1 , 2 , , 49 , 50;

    μ: a ve r a ge of e a c h q uali t y i n de x i n 50 ba t c hes ; j

    σ: va ri a nc e of e a c h quali t y i n de x i n 50 ba t c h es . j

    Ta ble 2 T he c o r r el a t i o n m a t ri x

    C V val ue of r ovi n g C V val ue of sp i n ni n g Co r r el a ti o n Fi g . 1 R el a t i o ns hip of e ve n ness C V val ue be t w e e n ya r n e ve n ness ya r n e ve n ness sp i n ni n g ya r n a n d r ovi n g ya r n Thi n place p er kil omet er 0 . 613 237 0 . 764 325 M o r e o ve r , si g nif ic a n t c o r r el a t i o n be t w e e n e ve n ness Thic k place p er kil omet er 0 . 309 398 . 312 091 0 C V val ue of sp i n ni ng ya r n a n d r ovi n g ya r n w as f ou n d i n N ep s p e r kil o me t e r 0 . 150 913 0 . 459 086 Ta ble 2 wi t h t h e c o r r el a t i o n of t he i n de x of 0 . 837 912 , CV value of r ovi ng ya r n 1 . 000 000 0 . 837 912 w hic h w as c o nf i r me d by t h e va ri a nce a n a ylsis lis t e d i n e ve n ness Ta ble 4 .

    ( ) ( )J o ur nal of D o n gh ua Uni v e rs i t y En g . Ed . V ol . 26 , N o . 5 2009 524

    [ 7 ] Table 4 Th e va ri a nc e a n al ysis of ya r n e ve n ness C V val ue be t w e e n t h e t w o f a c t o rs w as .

    a n d t he t hi n p l a c e Th e r e w e r e s o me ap p lic a t i o ns of t h e sc a t t e r di a gr a m

    a n d li ne a r r e gr essi o n e qua t i o n i n t he p r e2c o nt r ol a n d Si gnif ic a ntFCo nt e nt D F SS MS F2val ue 0. 05 m a n a ge me n t of ya r n q uali t y . N a mel y , t h e sp i n ni n g ya r n

    e ve n ness C V val ue c oul d be p r e dic t e d by t he r o vi ng ya r n R e gr essi o n 1 . 182 53 26 . 182 53 113 . 126 4 26 . 00 o bvi ous 4 ( ) e ve n ness C V val ue bas e d o n Eq . 3 . If t he p r e dic t i o n of 11 . 109 36 0 . 231 445 R esi dual 48 t he sp i n ni ng ya r n e ve n ness C V val ue w o ul d e xc e e d t h e Tot al 49 37 . 291 88 i n t e r n al e n t e rp ris e s t a n da r ds , me as ur es w oul d be t a ke n i n

    t he c a r di n g p r oc ess . Th e p r e dic t e d C V values of sp i n ni ng N ot e : D F s t a n ds f o r de g r e e of f r e e d o m ;

    ya r n e ve n ness w e r e s h ow n i n t he ap p e n dix w hic h t he r e w as a SS s t a n ds f o r s u m of s q ua r e ;

    ce r t ai n r esi dual e r r o r be t w e e n t he me as ur e d a n d t he MS s t a n ds f o r me a n s qua r e ;

    p r e dic t e d values c a use d by s o me unce r t ai n f ac t ors i n t he F2val ue = MS/ SS .

    dr af ti ng p r ocess . Fur t he r m or e , t he st a n da r d of t he r ovi ng A bs ol ut el y , r e g r essi o n m o del c oul d be es t a blis he d as [ 5 , 6 ] ya r n e ve n ness C V value mig ht be est a blis he d base d o n t he f oll ows : e ve n ness CV value of sp i n ni ng ya r n . ( )Y = A + B X + ε, 2 A n ot h e r ap p lic a t i o n w as t o es t i m a t e t h e s t a t e of t h e

    ( ) Y : t he e ve n ness C V val ue of s