ASTM D298-29 Specification for 23/5/3 Carded American Tire Cord (Withdrawn 1938)

STANDARD SPECIFICATIONS AND TOLERANCES
POR

23/5/3 CARDED AMERICAN TiRE CORD1

A.S.T.M . Designation: D 298- 29

These specifications are is5uL-d 'unctcr the fixed designation D 298; the Cinnl
number indicates the year of original adoption as stnndnrd or, in the case ol 1·evision,
the year of -Inst revision.

lssuuo A!! T1tNTAT1vn, 1928; Aoot'11iD, 192.9.

1. These specifications are intended to cover the requirements Scope.
of a tire cord of 23/5/3 construction made from carded American
cotton. The tolerances of these specifications are bused on the
tolerances in the Standard Specifications for Tolerances ·and Test
Methods for Tire Cord, Woven and on Cones (A.S.T.M. Designation :
D 179) of the American Society for Testing Materials.~

NOTE.-lt is recognized that mWlufncturers and consumer:i each have their own
theories as to certain cluiractcristics which the cord shou~d have but U1ese specitica·
tions are offered a9 a standard for those seeking a general a ll-around ~rd of this type.

2. The cord shall be that known in the trade as 23/5/3 construe- Conatructton.
Cotton.
tion. The actual size of the single yarn shall be so adjusted as to Put-up. ·
give the finished size of cord specified.

3. These specifications arc based on cord made from American

Middling cotton of good hard character with a staple length of I h in.

Ya.ms shall be single carded.
4. The cord shall be wound on cones to the dimensions and

yardage specified in the purchase contract, or if woven into tire-
cord fabric shall conform to the contract specifications.

PROPERTIES

5. The average tensile strength of the cord, conditioned, ns Tea11Jo

determined by. test shall not be less than 15.0 lb. Suon1th.

6. The average elongation or stretch of the cord, conditioned, as Blon1at1on

determined by test, taken at the IO-lb. load shall be 12.5 per cent

in the case of cord on cones and 14.0 per cent in the case of cord from

fabrics, subject to a pem1issiblc variation of plus or minus 10 per cent

1 Uader tho 1!4odardl...tJon proc:edure of t he Society, thDlll apodficat:ioaa are undet the juriadiction
of the A.S.T.M. Committco D· IJ on Tcstilo Ma terlals.

I Sea p. JOSS.

(1079)

1080 SPECIFICATIONS FOR CARDED AMERICAN TIRE CORD

Size or (not less than 11.25 nor more than 13.75 per cent in the case of cord
Yardage. on cones, and not less than 12.6 nor more than 15.4 per cent in the
case of cord from fabrics).
Thickness
(Gage). 7. The average size of the cord, conditioned, as determined by
Twist. test shall be l.25, or the yardage per pound, subject to a permissible
variation of plus or minus 3.0 per cent (average not less than 1018
nor more than 1082 yd. per lb.), shall be 1050 yd. per lb.

8. The average thickness or gage of the cord, as determined by
test shall be 0.033 in., subject to a permissible variatioµ of plus or

minus 3.5 per cent (not less than 0.032 nor more than 0.034 in.).
9. (a) The single yarn shall be spun with right-hand twist, with

a twist multiple of four times the square root of the actual single
yarn size.

(b) The forming twist of the 23/5 ply cord shall be right hand in
direction and shall be made with 18 turns per inch subject to a per-
missible variation of plus or minus 5 per cent (not less than 17.0 nor
more than 19.0 turns per inch).

(c) The final twist of the 23/5/3 ply cord shall be left hand in
direction and shall be made with 8 turns per inch subject to a per-
missible variation of plus or minus 4 per cent (not less than 7.7 nor
more than 8.3 turns per inch).

NOTE.-Direction of twist is defined in the Standard Definitions of Terms

Relating to Textile Materials (A.S.T.M. Designation: D 123) of the American
Society for Testing Materials.1

METHODS OF TESTING

Methods ol 10. All tests shall be in accordance with the methods of testing

Testing. prescribed in the Standard Specifications for Tolerances and Test

Methods for Tire Cord, Woven and on Cones (A.S.T.M. Designation:

D 179) of the American Society for Testing Materials.2

•Seep.1107.
•See p. 1085.