Table 14.2.
Tire yarn, cord, and fabric properties and associated test methods (Fung & Hardcastle, 2001; ASTM D885, 2010)
| Property | Test method |
|---|---|
| Yarns and cords | |
| Commercial mass of yarns | ASTM D2494, option II |
| Commercial mass of cords | As agreed upon between the purchaser and the supplier |
| Linear density | ASTM D1907 for yarns, ASTM D885 for cords |
| Thickness of cords | ASTM D885 |
| Twist in yarns and cords | ASTM D885 |
| Identification of fibers | ASTM D276 |
| Extractable matter in yarns and cords | ASTM D2257 |
| Moisture regain | ASTM D885 |
| Breaking strength (force) of conditioned yarns and cords | ASTM D885 |
| Breaking strength (force) of rayon yarns and cords at specified moisture regain level | ASTM D885 |
| Elongation at break of conditioned yarns and cords | ASTM D885 |
| Elongation of rayon yarns and cords at a specified moisture regain level | ASTM D885 |
| Force at specified elongation (FASE) of conditioned yarns and cords | ASTM D885 |
| Breaking tenacity of conditioned yarns and cords | ASTM D885 |
| Modulus of conditioned yarns and cords | ASTM D885 |
| Breaking strength (force) of oven-dried rayon yarns and cords | ASTM D885 |
| Elongation at break of oven-dried rayon yarns and cords | ASTM D885 |
| Force at specified elongation (FASE) of oven-dried rayon yarns and cords | ASTM D885 |
| Breaking tenacity of oven-dried rayon yarns and cords | ASTM D885 |
| Work-to-break of yarns and cords | ASTM D885 |
| Breaking toughness of yarns and cords | ASTM D885 |
| Breaking strength (force) of yarns and cords at elevated temperature | ASTM D885 |
| Shrinkage of conditioned yarns and cords at elevated temperature | ASTM D885, ASTM D4974 |
| Shrinkage force of conditioned yarns and cords at elevated temperature | ASTM D885 |
| Contraction of wet yarns and cords | ASTM D885 |
| Growth of conditioned yarns and cords | ASTM D885 |
| Dip (adhesive) solids pickup on yarns and cords | ASTM D885 |
| Adhesion of cord to elastomers | ASTM D4393, ASTM D4776, ISO 4647 |
| Longitudinal air permeability of tire of cords and yarns | ASTM D2692 |
| Tire cord fabrics | |
| Commercial mass of cord fabric | As agreed upon between the purchaser and the supplier |
| Width | ASTM D3774 |
| Mass of per unit area | ASTM D3776 |
| Count | ASTM D3775 with modification |
| Stiffness | ASTM D885 |
| Longitudinal air permeability of tire fabrics and cord fabrics | ASTM D2692 |