IS 834: Textiles- Ring Spun Grey Cotton Yarn for Hosiery

2006·1.3 MB·English

by  Bureau of Indian Standards

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“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 834 (2006): Textiles- Ring Spun Grey Cotton Yarn for
Hosiery [TXD 31: Man-Made Fibres, Cotton and their
Products]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

IS 834:2006
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Indian Standard
TEXTILES — RING SPUN GREY COTTON YARN FOR
HOSIERY — SPECIFICATION
(F@h Revision)
ICS 59.080.20:61.020
.,.

0 BIS 2006
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

Februaty 2006 Price Group 4
Man-Made Fibres, Cotton and Their Products Sectional Committee,TX31
FOREWORD
This Indian Standard (Fifth Revision) wasadopted bythe BureauofIndian Standards, afterthe draft finalized by
the Man-Made Fibres, Cotton andTheirProducts Sectional Committee hadbeen approved-by theTextile Division
.
Council.
This standard, originally published in 1967,wassubsequently revised in 1970,1975, 1985and 1993.Thisrevision
hasbeentakenuptoincorporatetherequirementsofbetterqualityofringspungreycottonyamsbeingmanufactured .
withtheuseofadvanced technology inspinning millsintended foruseinhosiery withemphasis onexport market.
Inthis standard, the requirements ofhairiness indexhas alsobeen specified.
The composition of the Committee responsible forthepreparation ofthis standard isgiven inAnnex D.
For the purpose of deciding whether a particular requirement ofthis standard iscomplied with, the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
1S2: 1960 ‘Rules for rounding offnumerical values (revised’. Thenumber ofsignificant places retained inthe
rounded off value should bethe same asthat ofthe specified value inthis standard.
IS 834:2006
Indian Standard
TEXTILES — RING SPUN GREY COTTON YARN FOR
HOSIERY — SPECIFICATION
(Fijih Revision)
1SCOPE 3.7 Ring Spun Yarn — Yarn spun on a system
employing flat top cards and roller draft assemblies
1.1 This standard specifies requiFemen~sof ring spun
with or without aprons on drawing, roving and ring
(singleanddoubled) greycottoncardedorcombedyam
frames.
for useinhosiery.
1.2This standard does not cover yam produced from 3.8 Single Yarn Tenacity — Tensile stressofasingle
strand at rupture expressed as force per unit linear
blends of cotton with man-made fibres or any other
density oftheunstrained specimen expressed ususally
fibre.
ascN/tex (gf/tex).
2REFERENCES
3.9 Tex — Anumber indicating the mass ingrams of
The Indian Standards listed in Annex A contain 1kmofyam, therelationship between thecotton count
provisions which through reference in this text, (Ne) andthetex being asunder:
constitute provisions of this standard. At the time of
publication, the editions indicated were valid. All tex = 590.5
standards are subject to revision and parties to Ne
agreements based on this standard are encouraged to
4 REQUIREMENTS
investigate the possibility of applying the most recent
editions ofthe standards indicated inAnnex A. 4.1 Single Yarn .,,,
3 TERMINOLOGY The single grey cotton carded and combed yarn shall
comply withtherequirements given inTables 1and2.
For the purpose of this standard the following
However the average count ofyarn shall beasagreed
definitions shall apply.
to between the buyer and the seller with a tolerance
3.1 Cotton Count (Ne) — Thenumber ofhanks(each of *3.O percent permissible on the count of yarn
measuring 768 mor 840yd) in453. 6 g(or 1lb). when determined as per the method prescribed
in IS 1315.
3.2 Count Lea Strength Product (CSP) — Anumber
obtained bythe following relationship: 4.1.1 Twist in Yarn
CSP = Breaking loadofa leainkgxCottoncount Thetwistinyamshallbeasagreedtobetweenthebuyer
(Ne) x 2.2046 andtheseller.However,thetwistmultiplier(seeNotes 1
and 2) of single yam shall not exceed 3.8 in case of
3.3 Grey Cotton Yarn — Yarn as it leaves the
combed yam and4.0 incase of carded yam. Insingle
spinning frame without any bleaching, dyeing or
yarn the average twist shall be within+ 10percent of
finishing treatment and it may have been waxed or
the specified value.
not waxed.
NOTES
3.4Hairiness Index (H) — Totallength ofprotruding
1 Indirectsystemofyarnnumberingtwistfactorcorresponds
fibres in the yam in cm with reference to the sensing inthe twist multiplier inindirect system ofyarn numbering.
length of 1cm yarn. Thesearecalculated asunder:
3.5 Lea — A continuous length of yarn measuring Twistfactor= ‘“r~p x@niversal countintex
109.73m(120 yd)intheformofacoilhaving 80wraps
wound or areel of 1.37m (1.5 yd) girth. Turns/inch
Twistmultiplier=
4Cotton count, Ne
3.6 Lea Breaking Load — Thebreaking loadofalea
2 The relationship between twist multiplier andtwist factor
determined on a pendulum type testing machine, the
forcottonyam isasunder:
rate oftraverse being 300+ 15mm/min.
Twistfactor =9.6xtwistmultiplier

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IS 834:2006
Table 1 Ring Spun Grey Cotton Carded Hosiery Single Yarn
(Ckmse 4.1)
. SI Requirement Count ofYarn Method
No. ofTest,
259 tex 37-53.7 29.5-34.2 20.3-28.1 15.11-19.7 10.9-14,8 2 10tex Refto
(<10s) tex tex tex tex tex (<55s)
(11s-16s) (16s-20s) (21s-29s) (30s-40s) (30s-39s)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo)
i) CountCV,percent, 1.80 2.00 2.00 2.00 2.20 2.20 2.40 1s1315
Max
ii) CSP,Min 1700 1800 1800 1900 1900 2000 2100 IS 1671
iii) LeabreakingloadCV, 6.0 IS 1671
percent,Mm
iv) Yarntenacity, cN/tex, 13.0 13.5 14.0 15.0 15.5 16.0 16.0 IS1670
Min
v) YarntenacityCV, 11.0 11.0 11.5 11.5 12.0 12.0 12.5 IS1670
percent,Mux
vi) Breakingelongation, 5.6 5.3 5.0 IS 1670
percent,A&
vii) Unevenness,percent, 11.0 11.5 11.8 12.5 13.0 15.0 15.5 SeeNotes 1
Max and2
viii) UnevennessCV, 13.75 14.38 14.75 15.36 16.25 18.75 19.38
percent,A40x
ix) Hairiness index 10.0 9.0 8.5 8.0 7.5 6.5 6.0 SeeNote3
x) Imperfections/km
Thin 3 3 8 12 20 50 50
Thick 85 90 120 180 260 275 350 SeeNote 1
Neps 90 100 172 238 420 475 800
Total 178 193 300 430 700 800 1200
xi) Classimat faults See4.1.3:2
Objectionable faults, o 5 10 15 40 60 60 See Annex
Max

Totalfault,M – 200 250 300 400 750 1200 1750

NOTES
1 Theunevenness percentage(Upercent)(seealsoNote2)andtheimperfectionsperkmoftheyarnonpackagesshallnotexceedthe
vahresgiveninTable 1whentestedataspeedof400m/minandatsensitivitylevelof–50, +50and+200percentforthinplaces,thick
places andneps respectively. Thespeed andsensitivity levelsmaybealtered, subjecttotheagreement betweenthebuyerandtbe
seller.
2 Theunevenness percentcanbeexpressedascoefficientofvariationofunevennessusingtheformula
CVpercent= 1.25xUpercent
3 Theevennesstestersareequippedwithhairinesstestingmodulewhichisusedtomeasurehairinessinyarnsdirectly.Themeasurement
zoneisformedbyafieldofhomogeneousparallelbeamoflight.Thescatteredlightiscausedbythosefibresprotrudingoutside the
yarnbody.Thescattered lightisameasureofthehairinessandismeasuredelectrically.

2
1S834:2006
Table 2 Ring SpunGrey Cotton Combed Hosiery Singte Yarn
(clau4s.1e)
sl Requirement Count ofYarn Method of
No. Test,
259 tex 37-53.7 29.5-34.7 29.3-28.1 15.1-19.7 10.9-14.8 7.9-10.7 >7.8 tex Refto
(<]0s) tex tex tex tex tex tex (<75s)
(10s-16s) (16s-20s) (20s-30s) (30s-40s) (40s-54s) (54s-75s)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) (11)
i) CountCV,percent,Max 1.60 1.80 1.80 1.80 t.80 1.80 2.20 2.20 Is 1315
ii) CSP,&fin 2000 2100 2100 2200 2200 2300 2350 2300 IS 1671
iii) LeabreakingloadCV, 5.5 6.0 6.2 6.4 6.6 6.6 6.8 7.0
percent,A40x
iv) Yarntenacity cN/tex 14.0 14.0 14.5 15.O 15.5 16.0 16.5 16.5 IS 1670
&fin
v) YarntenacityCV, 9.0 9.0 9.0 9.5 9,5 10.0 10.5 10.5 1S1670
percent,Mux
vi) Breakingelongation, 5.0 4.8 4.8 4.6 1S1670
percent,Mu-x
vii) Unevenness,percent, 8.20 8.50 8.80 9.60 10.50 12.00 12.50 13.50
Max See Notes 1
viii) UnevennessCV, 10.25 10.63 11.00 12.00 13.13 15.00 15.63 16.88 and2
percentM, u-r
ix) Hairiness index 6.5 6.0 5.7 5.5 5.0 4.5 4.0 3.5 SeeNote3
x) Imperfections/km
Thin o 0 0 0 1 4 12 35
Thick 4 8 9 14 22 38 72 125 SeeNote 1
Neps 6 15 18 26 47 78 146 240
Total 10 23 27 40 70 120 230 400
xi) Classimat faults See4.1.3:2
Objectionable faults, o 0 0 5 10 15 21 60
See AnnexC
Mox
Totalfault,J&r 100 125 150 200 350 600 850 950
NOTES
1 Theunevennesspercentage(Upercen t)(seealso Note2)andtheimperfectionsperkmoftheyarnonpackagesshallnotexceedthe

valuesgiveninTable 1whentestedataspeedof400m/minandatsensitivitylevelof-50, +50and+200percentforthinplaces,thick

places andnepsrespectively. Thespeeda ndsensitivity levelsmaybealtered, subject totheagreement between thebuyer andthe
seller.
2 Theunevenness percentcanbeexpressedascoefficientofvariationofunevenessusingtheformula:
CVpercent= 1.25x Upercent
3 Theevennesstestersareequippedwithhairinesstestingmodulewhichisusedtomeasurehairinessinyamsdirectly.Themeasurement
zone isformedbyafieldofhomogeneousparallelbeamoflight.Thescatteredlightiscausedbythosefibresprotrudingoutside the
yarnbody.Thescattered lightisameasureofthehairinessandismeasuredelectrically.
4.1.1.1 The twist in yarn shall be determined by the faults andthe values shallnot exceed the values given
method prescribed inIS 832. inTable 1orTable 2.
4.1.2 Yarn Appearance NOTE—Theclassimat faultsaretestedbytheCLASSIMAT
SYSTEM most commonly used in the mills. These are
The average black board appearance (5 boards) shall tested inclassimat tester where the yarn passes through the
beat least of Grade Basspecified inIS 13260. sensors andthe faults areexpressed asnumber of faults per
onelakhmeterofyarn,TMssystemworksonthecapacitance
4.1.3 Freedom from Defects principle. Classimat faults shall becategorized asspecified
inAnnexC.
4.1.3.1 The yarn shall be free from defects listed in
Annex B. 4.1.4 Moisture Regain
4.1.3.2 If agreed to between the buyer andthe seller, Unless otherwise.agreed tobetween the buyer andthe
the yam onpackages may also betested for classimat sellerthemoisture regain shallnotexceed 8.5percent.

3
IS 834:2006
4.1.4.1 Themoisture content shall be determinedly 5 MARKING
themethod prescribed in1S199.Themoisture content
5.1 Each cone of theyarn shall be marked with the
so determined shall be converted to moisture regain
following:
using the following formula:
.
a) Count ofyarn followed bythe word ‘Carded
100x MC
A4R= Hosiery’ or ‘Combed Hosiery’ asapplicable,
Ioo-Mc
forexample,’ 10tex(59sNe)Carded Hosiery’
where
or ‘15tex (40s Ne) Combed Hosiery’;
M. ==moisture regain, percent, and b) Net mass ofyarn inpackage;
A4C= moisture content, percent.
c) Indication ofthe source of manufacture; and
4.2 Two-Fold Yarn(Doubled Yarn) d) Any other information required bythe buyer
orbythe law inforce.
4.2. I The single yarn used for producing two-fold
yarns shall satisfy the requirements specified in4.1. 5.2 Eachbaleorcasecontaining conesshallbemarked
withthefollowing:
4.2.2 The average resultant count ofthetwo-fold yarn
shalIbe asagreed to between the buyer andthe seller. a) Count of yam followed bythe word ‘Carded
IIowever, a tolerance of +3.0 percent shall be Hosiery’ or ‘Combed Hosiery’ asapplicable,
permissible onthe average resultant count. for example, ‘10 tex (59s Ne) Hosiery’ or
‘15tex (40s Ne) Combed Hosiery’;
4.2.2.1 The resultant count shall be determined
according tothe method prescribed inIS 1315. b) Net mass ofyam inbulk packing;
c) Grossmass ofyarn inbulk packing;
4.2.3 Lea Breaking Load
d) Indication ofthe source of manufacture; and
The lea breaking load of two-fold yarn shall be
e) Any other information required bythe buyer
determined by the method prescribed inIS 1671.
orbythe law inforce.
4.2.4 The ply twist in the two-fold yarn shall be as
agreed to between the buyer and the seller, and the 5.3 BIS Certification Marking
average ply twist shall be within +5 percent of the Theconeofyams andbaleorcasemay alsobemarked
.,,.
specified value. with the Standard Mark.
4.2.4.1 The twist shall be determined by the method 5.3.1 The use of the Standard Mark is governed by
prescribed in IS 832. the provisions oftheBureau of Indian Standards Act,
4.2.5 The yam quality parameters ofthe double yarn 1986andtheRulesandRegulations made thereunder.
shalIbe asagreed to between the buyer andthe seller, ThedetailsofconditionsunderwhichtheIicencefor the
however, theyarnqualityimprovement duetodoubling useof StandardMarkmaybe grantedtomanufacturers

when compared to the single yam quality parameters orproducersmaybe obtainedfromtheBureauofIndian

would beasgiven inTable 3. Standards.
Table 3 Yarn Quality Improvement Due to Doubling
(Clause 4.2.5)
S1No. Quality Parameters Single Yarn Couot Extent ofImprovement, Percent
(1) (2) (3) (4)
i) LeaCSP,A4irr 29.5-14.7 tex (20s-40s) 10
14.7-9.8 tex(40s-60s) 12
9.8 tex(60s) &finer 15
11) LeacountCV(percent) AllCounts 0,5”
iii) LeastrengthCV(percent) AllCounts 1.0’)
ii,) SingleyarnstrengthCV(percent) AllCounts 20
v) TwistCV(percent) AllCounts 20-40
vi) “rotalimperfections a9.8tex(<60s) 90
<9.8 tex(60s)&finer 75
vii) Classimat objectionable faults AllCounts 75
NOTES “
I Percentimprovementisinrelationtothelevelofyarnqualityatsingleyarnstage.
2 ‘rhestrength improvementdependsuponthedirectionandamountofdoublingtwist,
1‘Absolutevalues,

4
IS 834:2006
6PACKING 7.4 In case two or less bales or cases are selected in
thesample, atleast 10cones shallbedrawn atrandom
Unless otherwise agreed, the yam shall be packed in
from each.of the selected bale or case. However, in
accordance with the procedure laid down in either
case three or more bales or cases are selected in the
IS 3086 or IS 3325 agreed to between the buyer and
sample, at least five cones shall be drawn at random
theseller.
from each ofthe selected bale orcase. The number of
7SAMPLING leastobeprepared from eachcone shall notbegreater
than 5. As far aspossible, equal number of leas shall
7.1 Lot bepreparedfromeachoftheselectedcone.Thenumber
Inany consignment the bales orcasescontaining yarn of leassoprepared from the lot shall beequal to 30.
ofthe same type and of the same nominal count shall 7.4.1 In case single yam tenacity is determined, the
constitute alot. number oftests shallnot be lessthan 50.
7.2 Samples shall bedrawn from.each lottodetermine
7.5 Criteria for Conformity
itsconformity with the requirements ofthe standard.
The lot shall be considered as conforming to the
7.3 Unless otherwise agreed tobetween thebuyer and
requirements of this standard, if the following
the seller the number of cases or bales to be selected conditions are satisfied:
from a lotshall be.in accordance with Table 4. The
a) The average count calculated from the test
bales orcases shallbeselected atrandom, andinorder
resultslieswithinthetolerances specified and
to ensure the randomness of selection, guidance may
thecoefficient ofvariation forthecount isless
be obtained from IS4905.
than those specified values.
Table 4 Sampling b) The count leastrength product ortenacity, as
the case may be, is greater than or equal to
S1 No. Lot Size Sample Size the minimum specified values, and the
(1) (2) (3) coefficient of variation is less than the
O up to3 1 specified values.
ii) 4-1o 2 c) All the test specimens examined for defects,
iii) 11-30 3 appearance, evenness, twist, moistii’re,
iv) 31-50 5
hairiness index shall satisfy the relevant
v) Over50 8
requirements.

ANNEX A
(Clause 2)
LIST OF REFERRED INDIAN STANDARDS
ISNo. Title ISNo. Title
199:1989 Textiles — Estimation of moisture, 1671:1977 Method for determination of yarn
total size or,finish, ash and fatty strengthparameters ofyams spunon
matter in grey and finished cotton cotton system ~rst revision)
textile materials (third revision)
3086:1965 Code for seaworthy packaging of
832:1985 Methods for determination of twist
cottonhosieWyam andgoods
inyarn @-st revision)
3325:1965 Code for inlandpackaging ofcotton
1315:1977 Method for determination of linear
hosiery yati andgoods
density of yarns spun on cotton
system @rst revision) 4905:1968 Methods forrandom sampling
1670:1991 Textiles—Yarn— Determinationof 13260:1993 Method ofgrading forappearance of
breaking loadandelongationatbreak cotton yarn using photographic
ofsinglestrand(second revision) standard

5