Polypropylene laminate solid safety pool cover with recyclability
AssigneePool Cover Corporation
InventorLeeAnn Pesta
Life of this patent
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Abstract
A light weight, durable, easily recyclable pool cover includes a fabric covering with reinforcing and attachment straps wherein, the reinforcing and attachment straps are attached to said fabric in a criss-crossed pattern. The fabric covering and the straps are produced from a single polymer consisting of polypropylene. The pool cover is entirely recyclable at end of service life by chopping the pool cover components in a simple machine producing granules useful for injection molding of polypropylene products. The pool cover fabric is produced by subjecting three layers of polypropylene sheet material to heat and pressure forming a strong durable fabric wherein the top layer and bottom layer are a solid fabric and the middle layer is multi-filament mesh of polypropylene threads.
Claims4
A swimming pool cover in combination with a swimming pool, consisting essentially of:
- a) a fabric cover enclosing the swimming pool thereunder;
- said fabric cover consisting of:
- i) a top layer of solid plastic polypropylene material as the only polymer present in said top layer, where a copolymer of polypropylene is absent from said top layer;
- ii) an intermediate layer of multi-filament mesh consisting of only polypropylene threads where a copolymer of polypropylene is absent from said intermediate layer of multi-filament mesh;
- said intermediate layer of mesh being coated with said top layer of solid plastic polypropylene material which penetrates said mesh and seals openings in said mesh;
- and
- iii) a bottom layer of solid plastic polypropylene material as the only polymer present in said bottom layer, wherein said bottom layer is attached to said intermediate layer of mesh;
- where a copolymer of polypropylene is absent from said bottom layer of solid plastic polypropylene material;
- said intermediate layer of mesh being coated with said bottom layer of solid plastic polypropylene material which penetrates said mesh and seals openings in said mesh;
- wherein said top layer and said bottom layer are bonded together and become indistinguishable;
- and
- b) reinforcing said swimming pool cover with attachment straps in a cross-crossed pattern on an outer surface of said top layer.
Dependencies are inferred from the claim text.