DE2106784A1 - Mixed fiber structure - Google Patents

Description

PATENT LAWYERS

DR.-ING. H. FINCKE DIPL.-ING. H. BOHR DIPL.-1NG. S. STAEGER

Telephone: * 26 6060

8 MUNICH S, Müllerstrasse 31

1971

TOX fiz - 3j; ν «..? 0, ^ - 5! 7

B E S Ö H.R B I B U H . '■ rar patent application of the

IMPERIAL CHEMICAL I] JJ) USiORIES LIHIiEED, London S.Vu iPABlTEH,

subject enäι
"Misühfasei? Structure ' ¹

PEIOEIiüÄSi February 13, 1970

The invention is based on improved synthetic 3-ply structure, and in particular on yarns with improved antistatic properties, which have been obtained by mixing the threads or fibers forming the pas structure with such fibers, v / which have a high electrical conductivity and v / eiche in the PoJ.ge as "leading" pasers • λ ö i chii et vio vä on>

109834/1631

According to the invention, e: lno I-iis - :: hi'aserstruktLvr Yoi-gszolij.a. · - gen, vrelclie d ».a <v ili gek. ^ In ^ iAc ^ riDt lot, i.e., Bxe synthetic threads or! contains fibers with a high electrical resistance and extremely rough structured fibers according to the definition below, where the straight ? ■ ?. » Spoiinenen fibers svrisohen 5 and 20 G-avi, - ^, voräugav / sicü 5 to -5 Gevi. ~ 54 contain conductive soot,

By the term "straight spun fibers" ¹ is meant an extruded synthetic polyester or polyamide barrels with a tear strength of at least 200 %, measured as defined in a series of 3. The term "straight spun fibers" includes partially or variably veratrockte Pasers with an elongation of at least 200 ⁰ yes at any point along their length,

Suitable straight spun fibers for use in accordance with the invention are polyester fibers such as ZoB, those derived from polyethylene terephalate, and polyamide fibers such as those derived from polyhexa m ethylene adipamide or polycaproamide.

The lasers that have just been woven can be in the streaked fiber structure as continuous loading or as monofilaments or as discontinuous threads are present. It is preferred that the fibers being spun be at least 0.5% by weight Make up mixed fiber structure, although there are also quantities of straight spun fibers of only 0 ,! Wt .- ^ are useful. the The upper limit for the amount of fibers just spun * which is present in the fiber structure is determined by the desired Conductivity and the tolerable color are determined »

The expression "threads or fibers with a high electrical resistance ¹¹ means threads or fibers which

109834/1631

BATH ORIGINAL

ci-ien -: 0.ο1ζ Arisen <ra V ^ Ciavst-arifi from iar> lir as ί, Ο χ 10 Olini at a relative humidity of 60 ^c j » if the determination is carried out by the method given below. Examples of such threads or fibers are those made of polyethylene terephthalate and polyhexamethylene adipaaliß.

For the Svecke eier present invention, the electric yiid purchase of a yarn is determined by the fact that * 25 G-ai? Nv. ^r inclp.ug <jn be wound up on a porffi, which is s \ tfoi parallel stainless steel fitting rods (4 mm in diameter ) n.ufw-ö, which have an ab ε ta ml of f cn, and that hisraui four elelitriisolie VJ arose ISS o ce: <: · au bars at 20 ⁰ O - rad is measured at oi'.icr given relative humidity..

Until ReissuehnuHg äer Gersäe ^ r.apoiinc-: icn LVaser vfird on a ü ". * icl: 35.1 XiictroK-Sugieiitiglieitsiorüfapparat under the following Conditions gciaeosen:

Test length öer jj- ^ sern 5 cas

Load '100 g

G-encüviiDoigkeit des EreusköpiCa 30 cm / man lescüv. ^r indigkeit fies registration =

Strip 50 cm / rain

. 'Oil speed tüOÜ fi

relative humidity $ 66

temperature 2O ⁰ O for polyamide fibers

■? 50 ° C for polyester fibers.

(Joeigneto conductive slipcover for Verv / extension according to the invention are solclie * v / elehe show Uncl good conductivity in the mass which entwedei * alone or with the aid of dispersing agents in a polyester or polyamide polymer he äisp yaws wesöi-in can _C. Examples for suitable conductive carbon blacks siiii. "the -X.ofenruSe Yu; '. oan Σ0 '.? i'R _f YuIcan 3X and

10983 ^ / 1631. ORiOINAL

Yulcan 63 ?. Examples of suitable M ßp erg i suffered are oxyäthyiierter 03eyl ~ and cetyl alcohol or mixtures thereof, which _{contain approximately 5 5} 5 moles of ethylene oxide per hydroxyl group, sodium sulfonate condensed naphthalene sulfonate !!, disodium salts of meth.ylene ~ Äina.iJhthaX . sulfated alkylphenol adducts «,

The hollow fiber structures of the present invention are useful are suitable for the production of textile fabrics and are particularly useful for the production of carpets «Such tea: - Fabrics or carpets can be added to the mixed yarn may contain other yarns, provided that sufficient blended yarn is present to feed the fabrics or Do not give carpets antistatic properties

The following examples, in which all ropes are expressed in percentages by weight, explain the invention,

A conductive carbon black, Tulcan XC - T2R, vmrde yaws in such an amount in the closed Polycaproaiaid disper that the carbon black IQ §ew accounted ₃ »fä5 dss Semi ULTRASONIC. ! The molten Ge; jisGii -was artriidiert and a G-eschv / indigkeit of ISI, 9 la / sis ayf.s ^ apult, with a 5 ~ £ ä <3iges just ge spciiöeass "ism -7,021 120 ae": sit an electric ¥ ider ~

i 70Ώ 5 ₅ C ζ 'O ^ OMi imfi ^ insr SsJdsnung von annälisrn 3n', vird €, Aüea «? ues vfar der Elolctrischs" -iidsr -.- ii isy ^ λί-Λ ^ Ιτς}! TsvcJr '; «^ n ^ ibjaSngig., Uach ieja "^ ar-. . uis j5 · ^ <i: d ¹ ^^^ "^^ 1wr.f ^£: xi: f a yets ^^ ok ^

70Ώ

7.'UiM-:

Blended yarn with good antistatic properties was obtained by as that PoXyhsxartnethylenadiparaidfäden vairden mixed with the above as-spun yarn, such that the latter 1 wt _e = $ of the mixed yarn constituted _B

Example 2

A molten dispersion containing 90 ropes of polycaproamide and 10 parts of Yulean XG-72R carbon black was extruded and wound up at a speed of 432.8 m / min to produce a monofilament yarn of 14 denier. The resistance of the monofilament at the sag of the spinning was β χ 10 ohms. The resistance was then increased during aging, changes in humidity were also carried out, followed, with the following results being obtained:

Ι «, the yarn was kept for 3 days at a relative humidity of 60 i» , - resistance 4 χ 10 ⁸ ohms,

2ο The yarn was then exposed to a relative humidity of 20 i "and left for 5 hours - 1 χ resistor 10 ⁸ ohms.

Bas yarn was another 19 hours at a relative

ff

light held by $ 20 «- Resistance 8 χ 10 Obm.

ο Bas S-ai? ^ vmra® üs & m

üs & m v? l

3äsr in an atmosphere nit 60 si. ^ Abraöht -anc "äovt 10 days on

Ij OJr.::-.

BATH

Yarn with a lower moisture content also reduced the * Resistance, however, was the change with the relative humidity apparently reversible. The absence of the usual Increasing resistance with decreasing humidity is useful Property of the synthetic yarns according to the invention.

example

This example illustrates the significantly improved conductivity of straight spun fibers containing conductive carbon black as compared to drawn clay, but otherwise identical fibers,

Polycaproamide j which held 10 ° ß> Vulcan XC 72R dispersed ent ", was extruded and at 275-280 ⁰ C spooled under such conditions at a speed of 121.9 m / min, that just spun monofilaments with a {Piter of 19» 5 Å and 40.0 den were obtained. The monofilaments just spun had an elongation at break of approximately 350 5 ». The as-spun monofilaments with a! Pus from T9 "5 äBTi and 40.0 to have electrical resistances * measured at 20 $ relative humidity of 6.0 χ 10 or Ohio, 4.5 χ 10 ^β 0hm.

A tucked Konofaden with a fiter of 17.3 was obtained öadureh, which the above polymer composition with a? Sessfeiindigksifc of 304 3 m / m ± n ertrucicrt 3? Ii'l; iciXjicei ';.; toi. _"5} S yes / \ v -" .. n in sinem Gain-

extruded at a speed of 228.6 m / min and was executed under the above conditions.

The drawn monofilaments containing dispersed carbon black had elongations at break of approximately 20 %.

The drawn monofilaments with a title of 17.3 den and 4-ί, Ο den had electrical resistances, measured at 20 ^{% relative humidity, of 1.5 x 10 1} ^ ohms and 2.0 χ 10 ^ ohms, respectively.

example

A drawn and crimped yarn of 136 polyhexamethylene adipamide filaments of 2450 denier was plied with a straight-spun polycaproamide monofilament of 25 denier containing 10% by weight & conductive carbon black Vulcan XC-72R. The yarn was wound on a Porm, and its electrical resistance vrarde measured before and after cleaning "The unpurified and the purified mixed yarn had an electric ¥ esistance measured at approximately 25 f> relative light, of 3.2 χ 10 ¹⁰ 0hm bsw * 7.5 x 10 ⁵ 0hm, compared to 2 χ 10 ^J 0hm purified Polyhexa m ethylenad ipamidgarn _o

example

; in * um u Γΐι-ι ι ι-ι i

Ma geraös gepciii- ^ sss: Ussm sjm 52 i'äöea with 6SO den was

, which is 10% by weight. is higher; Opposition WGü Iy ^: "-"; ~: _: ->λ'2 QiMm? ~ && iiii.gfflig ^ rough StfVi'X'ig.

Ϊ09834 / 1831

crimped in a stauohfco-siiier and the crimped yarn is converted into staple fibers from K), 2 ο the staple fibers were mixed with crimped polyhexaiaethylene adipaiaidstapeX fibers (E2 den / thread) »in such a way, üass 0.5, ί, Ο bav / o 2.0 ψ of the carbon black containing fibers in the blended yarn o The blending was carried out while the yarn was being spun in a conventional wool process to produce a 55's Drewshury Count * double staple yarn which had 3 1/2 2 ™ twists each 25 mm in the single strand and 2 3/4 S-twists each 25 ram in the plied yarn.

The mixed yarns, which 0 _s 5? ?? 0 baw «, 2 * 0 '$> of the soot-containing fibers had electrical resistances, measured at 25 ^c /> relative light, after cleaning and rinsing, of 1.8 1Cr 0hm _s 3» 4 x 10 ohms bzvi. 3.2 χ 10 ⁸ ohms,

The mixed yarns are used to make a loop pile and making a cut pile carpet that is good antistatic Properties

B e i S P i e 1

Conductive carbon black, Vulcan XG «= 72R, was dispersed in molten polyethylene terephthalate in such an amount _? that the carbon black 10% by weight of the mixture η r. stacht ö _e Dae molten mixture vrarde extruded and ait a speed of 152.4 m / min wound, wherein a 5-filamentous just spun yarn of '20 now having an electrical resistance, measured at 20 i * relative humidity of ₉ ?? 5 .x 10 ⁵ GIm n & eli cleaning uvA SpU "." ng received * ^ rde,

109834/1631

2108784

This yarn t-rarüe darni with an extended, crimped yarn made of 136 polyhexainetiiyXenaclipainidfaden of 2450 den plied, and the wiööiigarn vraräe wound on a form. The electrical resistance of the mixed yarn was measured on this i? Orm j, before and After cleaning, it was found that the electrical resistance at a residual humidity of 20 $ was approximately 1.7 x 10 ohms or Ui? s 10 ⁶ ohms. This is 2.0 χ IO ^J3 ohms for a cleaned Compare polyhexaasethylene adipamide at the same relative humidity _{or similar}

Example 7

rü ^ Wvi

Example 6 vmxüQ repeated, Rait the difference that instead of polyethylene terephthalate used Polyhessiaethylenadipamid ■ ^T .furde, the just-spun yarn containing 5 3? Aeden and I20 having the ₉ had an electric V / ider-

stood, measured at $ 20 relative peu _. of 1.0 χ 10 ohms after cleaning and washing «,

The yarn was then pinned with a crimped polyhexainethylene adipamide yarn with 136 pads and 2450 pads. The mixed yarn was wound on a shape and the electrical resistance was measured before and after cleaning. "The uncleaned and the cleaned Mixed yarn had an electrical resistance, measured at approximately 20 ^u / o relative luminosity, of 6.0 χ 10 ohms or 2.0 χ 10 ohms, which is 2 x 10 ^ ohms for a purified polyhexamethylene adipamide yarn with the same relative 3 ? euchte to compare «.

PAiEHiCAIISPRUOHE:

109834/1631

Claims (1)

? o - P A 3; E B I A ΪΓ S P. E Ü C II JS ί Mixed fiber structure, characterized in that it contains synthetic threads or Pas em Hit a high electrical resistance inid auaserdera straight spun fibers as defined, the just spun IF fibers containing between 5 and 20% by weight of conductive carbon black 2 ο Hischfaserstrtsktur according to claim I ₁ characterized 9 that the as-spun fibers is between 5 and) 5 wt _ö - $ conductive EUSS contain ". Mixed fiber structure according to claim 2, characterized in that g3 ~ that the just spun. Soot-containing lasers at least O ₇ 5 G-sw _β Η »the His-shfaserst ^ 'ktur sub« make » ι: -, Yervjsndung der Misoltfaserst structureoa according to one of claims 1 taia 5 for the production of iOeppiche'io WWN. H. FINCKE, DIPPING. H. . S. STAEGER 109834/1631