Fabric for toothed power transmission belt and belt
View Patent ↗A fabric for reinforcing a power transmission belt including fibers of polyarylene sulfide and a belt utilizing the fabric. The fabric may have textured or elastic core wrapped stretch yarns in the longitudinal direction. Longitudinal yarns may include PPS and textured transverse yarns include nylon. Yarns may include blends of high performance fibers and nylon or other fibers.
1. A woven stretch fabric for reinforcing a power transmission belt consisting of textured continuous fibers of polyarylene sulfide and optionally some textured continuous fibers of polyamide.
2. The fabric of claim 1 comprising warp and weft threads, wherein at least one of said warp and weft threads comprises said continuous fibers of polyarylene sulfide in the form of a textured multifilament yarn of poly p-phenylene sulfide fibers.
3. The fabric of claim 2 wherein said poly p-phenylene sulfide fibers are present in the weft and textured to have at least 50% elongation at 2 kg tension, and said warp comprises textured polyamide fiber.
4. The fabric of claim 3 wherein said fabric further comprises as said polyamide fiber nylon-66 fibers textured to have from 1 to 20% elongation at 2 kg tension, and wherein said fabric has no elastic core thread.
5. A power transmission belt having an elastomeric body, a tensile member embedded within said body, a pulley contact surface, and a back surface; comprising on at least one of said surfaces a woven stretch fabric consisting of textured continuous fibers of polyarylene sulfide and optionally some textured continuous fibers of nylon.
6. The belt of claim 5 in the form of a toothed belt having teeth on said pulley contact surface and with said fabric covering said teeth.
7. The belt of claim 5 wherein said fabric is woven with transverse and longitudinal threads with respect to their orientation in the belt, and wherein said transverse threads comprise nylon-66 fibers, and said longitudinal threads comprise both textured nylon-66 fibers and said polyarylene sulfide fibers in the form of poly p-phenylene sulfide fibers.
8. The belt of claim 7 wherein said transverse threads are textured to achieve from 1% to 20% elongation at 2 kg tension, and said longitudinal threads are textured to achieve at least 50% elongation at 2 kg tension.
9. The belt of claim 7 wherein said longitudinal threads comprise no elastic core.
10. A power transmission belt reinforced with a woven stretch fabric comprising longitudinal yarns oriented in the belt longitudinal direction that are capable of stretching at least about 50% and transverse yarns oriented in the belt transverse direction;
with the longitudinal yarns consisting of polyamide fibers and fibers of polyarylene sulfide; and
the transverse yarns consisting of textured multifilament polyamide yarn.
11. The belt of claim 10 wherein the longitudinal yarns are textured to achieve said stretching capability.
12. The belt of claim 10 wherein the transverse yarns are textured to achieve the capability of stretching in the range of from about 1% to about 20%.
13. The belt of claim 10 wherein the transverse yarns are textured to achieve the capability of stretching in the range of from about 2% to about 10% under 2 kg tension, and said longitudinal yarns are capable of stretching at least about 80%.
14. The belt of claim 12 in the form of a toothed power transmission belt.