Boots – shoes – and leggings – Insoles – Laminated
Patent
1979-01-29
1980-11-25
Ball, Michael W.
Boots, shoes, and leggings
Insoles
Laminated
428244, 428281, 428290, 428306, 428408, A43B 1338, B32B 532
Patent
active
042350271
ABSTRACT:
Air permeable wear-resistant insoles comprising a web or matt layer of fibres, bonded with active carbon and bonded thereto a wear-resistant fabric which is different from and has greater wear-resistance than said web or matt layer, in which the ply bond strength of the said bond between the wear-resistant fabric and the said matt or web layer is greater than the ply bond strength of the matt or web layer itself, said insoles being produced by forming a web or matt of fibres loaded with active carbon by an air-laying method onto a wear-resistant fabric, impregnating the web or matt of fibres with a latex binder and effecting migration of the binder from the interior of the web or matt to the surfaces thereof and curing the binder to form an air permeable insole. The bond strength between the wear-resistant fabric and the web or matt layer is increased without lowering the permeability of the web or matt to the point where it fails to achieve its object by coating the outer surface of the wear-resistant fabric section of the insole with latex binder which contains sufficient wetting agent to effect penetration of the latex binder through the wear-resistant fabric and partially but not completely into the surface of the web or matt attached thereto and the binder is cured.
REFERENCES:
patent: 2254711 (1941-09-01), Sehur et al.
patent: 2501988 (1950-03-01), Boffinston
patent: 3382090 (1968-05-01), Meisel et al.
patent: 3852897 (1974-12-01), Bridge et al.
Associated Paper Industries Limited
Ball Michael W.
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