Floor underlay
AssigneeInstaFibre Ltd
InventorDuonne Erasmus
Life of this patent
Estimating the term…
Abstract
A product, generally in sheet form, and suitable for use as an underlay for a floor covering intended for permanent installation, including a layer comprising crumb-rubber material and having a first side and a second side. A coating of a high-grab pressure sensitive adhesive is applied directly to at least part of the exposed surface of the crumb-rubber material. The adhesive is determined to be a high-grab adhesive if, after 24 hours adhesive binding dwell-time, it has a 90° peel adhesion at 300 mm/minute, as measured by the FINAT Test Method No: 2, of between 4.35 and 21.76 Newtons/25 mm width at room temperature (23° C.±1° C.) and at a relative humidity of 50%±5%.
Claims6
A product, generally in sheet form, and suitable for use as an underlay for a floor covering intended for permanent installation, the product comprising:
- a layer comprising crumb-rubber material and having a first side and a second side without a scrim or other strengthening layer applied to the crumb-rubber layer on the first side thereof, and without a scrim or other strengthening layer applied to the crumb-rubber layer on the second side thereof;
- and
- a coating of a high-grab pressure sensitive adhesive applied directly to at least part of an exposed surface of the crumb-rubber material on at least one of the first and second sides.
- wherein the high-grab adhesive comprises an adhesive having, after 24 hours adhesive binding dwell-time, a 90° peel adhesion at 300 mm/minute, as measured by FINAT Test Method No. 2, of between 4.35 and 21.76 Newtons/25 mm width at room temperature (23° C.±1° C.) and at a relative humidity of 50%±5%.
A product, generally in sheet form, and suitable for use as an underlay for a floor covering intended for permanent installation, the product consisting essentially of:
- a first layer comprising crumb-rubber material and having a first side and a second side;
- a second layer consisting of a coating of a high-grab pressure sensitive adhesive applied directly to at least part of an exposed surface of the crumb-rubber material on at least one of the first and second sides;
- and
- a third layer comprising a release sheet adhered to an exposed adhesive coated surface;
- wherein the high-grab adhesive comprises an adhesive having, after 24 hours adhesive binding dwell-time, a 90° peel adhesion at 300 mm/minute, as measured by FINAT Test Method No. 2, of between 4.35 and 21.76 Newtons/25 mm width at room temperature (23° C.±1° C.) and at a relative humidity of 50%±5%.
A product, generally in sheet form, and suitable for use as an underlay for a floor covering intended for permanent installation, the product consisting essentially of:
- a first layer comprising crumb-rubber material and having a first side and a second side
- a second layer consisting of a coating of a high-grab pressure sensitive adhesive applied directly to at least part of an exposed surface of the crumb-rubber material on the first side;
- a third layer comprising a release sheet adhered to an exposed surface of the second layer;
- a fourth layer consisting of a coating of a pressure sensitive adhesive, selected from a group consisting of the high-grab pressure sensitive adhesive and a low-grab pressure sensitive adhesive, applied directly to at least part of an exposed surface of the crumb-rubber material on the second side;
- and
- a fifth layer comprising a release sheet adhered to an exposed surface of the fourth layer;
- wherein the high-grab adhesive comprises an adhesive having, after 24 hours adhesive binding dwell-time, a 90° peel adhesion at 300 mm/minute, as measured by FINAT Test Method No. 2, of between 4.35 and 21.76 Newtons/25 mm width at room temperature (23° C.±1° C.) and at a relative humidity of 50%±5%;
- and
- wherein the low-grab adhesive comprises an adhesive having, after 24 hours adhesive binding dwell-time, a 90° peel adhesion at 300 mm/minute, as measured by FINAT Test Method No. 2, of between 1.77 and 3.96 Newtons/25 mm width at room temperature (23° C.±1° C.) and at a relative humidity of 50%±5%.
Dependencies are inferred from the claim text.