Board derived from recycled waste material comprising polyvinylchloride
AssigneeSika Technology AG
InventorsBrian J. Whelan, Albert J. Duhamel, Xiong Jiang, Blaise W. Leeber, Ajay Padwal
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Abstract
A board for use in a construction related application, the board including: a) a core layer having first and second major surfaces and b) a first facing layer directly adjacent to the first major surface of the core layer, wherein the core layer includes recycled polyvinylchloride membrane waste material.
Claims10
A method for producing a board that is suitable for use in a construction related application and includes (i) a core layer having first and second major surfaces, and (ii) a first facing layer directly adjacent to the first major surface of the core layer, wherein the core layer includes recycled polyvinylchloride membrane waste material and comprises a thermoplastic bonding material including polyvinylchloride resin, the method comprising steps of:
- I) providing a waste material feedstock including a first waste material fraction comprising polyvinylchloride membrane waste;
- II) providing a second waste material fraction comprising residual fluff, which is a by-product that is separated from polyvinylchloride membrane waste when the membrane waste is processed to decrease the particle size of the membrane waste;
- III) combining the first waste material fraction and the second waste material fraction to provide a waste material feedstock having 15-85 wt. % of the first waste material fraction and 15-85 wt. % of the second waste material fraction,
- IV) heating and compressing the waste material feedstock obtained from step III) within a fixture to form the core layer of the board.
Dependencies are inferred from the claim text.