Layered product comprising superabsorbent polymer
AssigneeWaterdrager Holding B.V.
InventorsMarco Johannes Cornelis Marie Claessens, Thomas Roeling
Life of this patent
Estimating the term…
Abstract
A layered product including at least one natural fiber layer including a web of natural fibers and at least one SAP layer including a non-woven substrate including a thermoplastic polymer fibers and a superabsorbent polymer adhered to thermoplastic polymer fibers, wherein the non-woven substrate is a high loft fabric, for example an airlaid or spunlaid non-woven, and wherein the natural fiber layer and the SAP layer are connected to each other by needle punching, stitch bonding or using an adhesive. A process to prepare the layered product and the use of the layered product in for example horticulture.
Claims13
A layered product for use in horticulture, comprising:
- at least one natural fiber layer comprising a web of natural fibers and
- at least one SAP layer comprising a non-woven substrate comprising a thermoplastic polymer fibers and a superabsorbent polymer adhered to the thermoplastic polymer fibers,
- wherein the non-woven substrate is a carded, an airlaid or spunlaid non-woven,
- wherein the at least one SAP layer is in the form of a sheet,
- wherein the thermoplastic polymer in the at least one SAP layer comprises a polylactic acid,
- wherein the natural fibers are selected from the group consisting of hemp, jute, flax, coir, cotton and wood fibers,
- wherein the natural fibers have an average length of 2-15 cm,
- wherein the at least one natural fiber layer has an average density of 12.5-75 g/L,
- wherein the at least one natural fiber layer comprises less than 5 wt. % of a thermoplastic polymer, and wherein the at least one natural fiber layer and the at least one SAP layer are connected to each other by needle punching, wherein the layered product has the at least one natural fiber on one side and the at least one SAP layer on an opposite side.
Dependencies are inferred from the claim text.