Multi-layer combination sponge
AssigneeSBI, Incorporated
InventorsScott Osiecki, Steve Sieckowski, Harry J. Steele
Life of this patent
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Abstract
A multi-layer combination sponge includes a scrubbing layer and a cleaning layer that are each laminated to an intermediate layer. The intermediate layer is more compressible than the cleaning layer and the scrubbing layer, and a groove is formed around a perimeter of the sponge between the cleaning layer and the scrubbing layer. The layers are preferably coextensive, forming a nose portion at the front of the combination sponge and having rounded comers at the rear of the combination sponge. The cleaning and intermediate layers each have an approximately equal thickness, and the scrubbing layer has a thickness less than one-half as thick as either the cleaning layer or the intermediate layer.
Claims19
A multi-layer combination sponge, comprising:
- a cleaning layer of polyester-based polyurethane foam having fully reticulated pores in a uniform network of substantially equilateral cells, the cleaning layer also having a porosity greater than 60 ppi, a density between 1.7 and 2.1 pcf, and a hardness between 0.3 and 0.7 psi;
- a scrubbing layer of polyester foam having non-reticulated, open-cell pores with a porosity of less than 20 ppi, a density between 2.0 and 2.4 pcf, and a hardness greater than the cleaning layer hardness;
- and
- an intermediate layer of polyether-based polyurethane foam having partially reticulated pores in a heterogenous network of irregular cells, a porosity between the cleaning layer porosity and the scrubbing layer porosity, a density less than the cleaning layer density, and a hardness less than the cleaning layer hardness, the intermediate layer also having a first side attached to the cleaning layer and a second side attached to the scrubbing layer such that fluid can travel between the cleaning layer and the scrubbing layer.
A multi-layer combination sponge, comprising:
- a cleaning layer of open-cell, polyol-based polyurethane foam having a hardness;
- a scrubbing layer having a hardness greater than the hardness of the cleaning layer;
- an intermediate layer of polyol-based polyurethane foam having a first side attached to the cleaning layer and having a second side attached to the scrubbing layer, the intermediate layer of foam having a hardness less than the cleaning layer hardness;
- and
- a groove formed between the cleaning layer and the intermediate layer.
Dependencies are inferred from the claim text.