Method of making shoes using a particular shoe stiffener

Details Method of making shoes using a particular shoe stiffener Method of making shoes using a particular shoe stiffener

1987-09-23

1989-03-21

Ives, P. C.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156580, 428412, 428216, 4284758, 4284761, 428516, 36 45, 36 68, B29C 6700, B32B 3100, B32B 2736, A43D 2100

Patent

active

048140376

ABSTRACT:
The invention presents to the art a novel, improved shoe stiffener which comprises co-extruded layers of plastics film. The shoe stiffener comprises co-extruded layers of plastics film, a first of the layers comprising an ionomeric material and providing a main body of the stiffener and a second layer comprising a plastics material which does not adhere to a fusion press under conditions normally encountered therein during bonding of a shoe stiffener to a shoe upper. Nylon 6 is the preferred second layer plastics material. The co-extrusion product replaces fabric backed shoe stiffeners in which flaws induced in the film by the fabric may provide notches from which cracks in the material can propagate.

REFERENCES:
patent: 3964951 (1976-06-01), Kremer et al.
patent: 4038449 (1977-07-01), Uemura et al.
patent: 4115612 (1978-09-01), Closson, Jr.
patent: 4197069 (1980-04-01), Cloeren
patent: 4220684 (1980-09-01), Olson
Chemical Abstracts (101: 8417r), vol. 101, 1984, p. 52, Abstract No. 8417r, Belg. BE 898,132, "Heat Resistant Laminated Packing Film".
Chemical Abstracts (82: 126089), vol. 82, 38-Plastics Manuf., 1975, p. 37, Abstract #126089x, Japan Kokai 74, 117,574 "Adhering Polyamides with Polyolefins".
Chemical Abstracts 104(20): 169808w, 38-Plastics Fabr., Uses, 1986, p. 63, Abstract #169808w, Eur. Pat. Appl. EP 170,385 "Nylon-Based . . . ".

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