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%.
Claims11
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, 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 method of manufacturing a product, generally in sheet form, and suitable for use as an underlay for a floor covering intended for permanent installation, the method comprising the steps of:
- manufacturing a scrim-less sheet comprising crumbs of rubber bonded to each other to each other to form a crumb-rubber layer;
- and
- applying a pressure sensitive adhesive directly to at least part of an exposed surface of the crumb-rubber layer,
- wherein the adhesive, after 24 hours adhesive binding dwell-time, has 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 comprising:
- a layer comprising crumb-rubber material and having a first side and a second side, and
- a coating of a high-grab pressure sensitive adhesive applied directly to at least part of an exposed surface of at least one of said first and second sides without a scrim or other intervening layer being interposed between the adhesive and the crumb-rubber material 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%.
Dependencies are inferred from the claim text.