US 12,305,313 B2
Base fabric, bonded fabric, high performance belt and manufacturing processes thereof
Giuliano Costa, Podenzano (IT)
Assigned to COSTA S.R.L., Podenzano (IT)
Appl. No. 17/911,674
Filed by COSTA S.R.L., Podenzano (IT)
PCT Filed Mar. 16, 2021, PCT No. PCT/IB2021/052169
§ 371(c)(1), (2) Date Sep. 15, 2022,
PCT Pub. No. WO2021/186339, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 1020200005740 (IT), filed on Mar. 18, 2020.
Prior Publication US 2023/0136103 A1, May 4, 2023
Int. Cl. B29C 65/00 (2006.01); D03D 1/00 (2006.01); D03D 13/00 (2006.01); F16G 1/10 (2006.01); B29C 65/48 (2006.01)
CPC D03D 1/0094 (2013.01) [D03D 13/00 (2013.01); F16G 1/10 (2013.01); B29C 65/48 (2013.01); D10B 2401/061 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A process for manufacturing a bonded fabric for a belt, the process comprising:
providing a base fabric made up of warp yarns in a longitudinal direction and weft yarns in a transverse direction, orthogonal to the longitudinal direction, wherein the warp yarns are provided with a predefined elasticity and the weft yarns are provided with a lower elasticity than the warp yarns;
subjecting the base fabric to a bonding treatment, wherein the warp yarns and the weft yarns are coated with a covering made of solidified polymeric materials, wherein the bonding treatment comprises an imbibition step, a drying step in a furnace, and a resinification step,
wherein, during the imbibition step, the base fabric is impregnated with an aqueous solution based on resorcinol, formaldehyde, and latex; and
wherein, after the resinification step, the bonded fabric has a weight (g/m2) between 20% and 32% greater than the weight of the base fabric.