ASTM D203-33

Methods of Testing Tolerances for Cotton Yarns (Withdrawn 1936)

General Information

• Status: Withdrawn
• Technical Committee: D13 - Textiles

Standards Content (Sample)

STANDARD SPECIFICATIONS
FOR
TOLERANCES AND TEST METHODS FOR ELECTRICAL
1
COTION YARNS
A.S.T.M. Designation: D 203-33
These spccifirotions nrc issm:d under Lhe fixed designation D 203; the final
number indicates the year of original adoption ns stMdard or, in the cnse of revision,
the year of last revision.
Issunn AS 'l'I!NTATIVI·:, 1924; AuOI'TRU IN AMIHIIJIW FOI(M, 1925; RRVISBD, 1933.
Scope
1. These specifications cover the tolerances and methods of
testing for electrical cotton yams, both single and multiple wound.
TOLERANCRS
Strength
2. The avemge tensile strength of each case or bale of yam, either
single or plied, as dctennincd hy test slmll be not less than the sped tied
strength.
Size or Yarn Number
3. The average size of each case or bale of yarn, in the singles,
either c.1.rdcd or combed, as determined by test slmll not be more
than 3 per cent over or under the spcdticd size .
. Kmmf1le.-No. 36 canlcd yaru specified; tolerance wou!J nllmv 34.92 lo
37.08.
Twist
4. D-ircclion of 1'wist.-The direction of twist shall be as defined
in the Tentative :Oellnitions and Terms Relating to Textile :Materials
(A.S.T.M. Designation : D 123 - 33 T) of the American Society for
Testing Materials, as follows:
Twist, Di,·cctio~t 11].-In the case of yarn or cord: the yam or cord
has right-hand or regular twist if when it is held vertically the spirals
or twists are seen to incline upward in a right·h<~nd direction and has
left-hand or reverse twist when the spirals or twists are seen to incline
upward in a left-hand direction.
NoTE.-Attention is rolled to the fact that this definition of twist is opposite
to that used in sewing thrend manufacture.
'Under tho stAndi\Cdi•.ation proco tioll <>f tho A.S.'l'.M. CommiLtt~ 0.1.1 on Te~tilo MRtedals.
(1171)

---------------------- Page: 1 ----------------------
1172 SPECIFICATIONS FOR ELECTRICAL CoTTON YARNS
Twist of Plied Yarns
5. The average twist of each case or bale 0£ yarn, either single
or plied, as determined by test shall not be more than 5 per cent over
or under the specified twist.
Example.-Twist specified is 20 twists per inch; tolerance 19 to 21.
METHODS OF TESTING
STRENGTH
Testing Machine
6. All skeins shall be broken on an automatic power yarn tester
of inclination balance type of 150 and 300-lb. capacities. The lower
capacity should be used until the swing of the pendulum exceeds an
angle of 45 deg. from the vertical. When yarns break above this
mark, the higher capacity of testing machine should be used.
Spools
7. The spools used in holding skeins during testing shall not be
less than 1 in. in diameter, and not less than 1 in. in width. The upper
or head end spool should be fastened solidly, and the lower spool
be allowed to revolve.
Speed
8. The speed of pulling jaw shall be 12 in. per minute.
Reels
9. Any yarn reel having a 1~-yd. perimeter may be used in pre­
paring the skeins. For yarn wound on cones, where the yarn is drawn
from the top, a speed of 100 to 300 r.p.m. of reel shall be used. For
yarn wound on parallel tubes, the yarn shall be drawn from the side,
and a speed of 20 to 30 r.p.m. of reel shall be used. On reels that have
only one pigtail guide and for yarns on cops or cones, either single
TABLE I,
NUMBER OF ENDS IN LENGTH TO REEL
SINGLE STRAND FOR TEST, YO,
2 . 60
3 . 45
4 and 5 . ' . 30
6 and 7 . 21
8 and above. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
end or multiple wound, the tension shall be applied by making one full
wrap around the guide. For yarns on parallel tubes, either single end
or multiple wound, there shall be no wraps around the guide. On
reels using two or more guides, the yarn, either single end or multiple
wound, shall pass straight through the guides onto the reel, the angles
of the guides supplying the necessary tension. Judgment must be

---------------------- Page: 2 ----------------------
A.S.T.M. DESIGNATION: D 203-33
1173
used in regard to the amount of tension required on yarns having little
or a large amount of twist.
Number of Tests
10. Three .tests from each of four cops, cones or tubes of yarn
from every case shall be made, and the average of these twelve tests
shall be the average of the case.
Two skein test methods are given, A, Preferred Method and B, Alternate
Method. The Alternate Method can be used where routine testing is done on
a large scale. The Preferred Method should always be used in case of dispute.
A. Preferred Method
Strength, Single End Yarn
11. For single end yarn a standard skein (120 yd.) shall be broken
after conditioning in an atmosphere of 65 per cent relative humid
...