Shoe and process for sealing the sole area of a shoe
AssigneeW.L. Gore & Associates, Inc.
InventorMax Rauch
Life of this patent
Estimating the term…
Abstract
A process which serves to seal and waterproof the outsole-side end area of a waterproof shoe shaft and/or to pad the outsole-side end of a shoe by putting a liquid, curable, filling material into the space between the insole and outsole is described. The outsole is provided with an input opening for putting in the filling material. The outsole is adhered to the shaft only in a circumferential area and in such a way that the outsole-side end area of the shaft remains unadhered. The liquid filling material is put in through the input opening, between the insole and the outsole, from where it flows into the outsole-side end area of the shaft due to its good flowability. The liquid material contains polyurethane precursor ingredients which react to form a foam polyurethane.
Claims14
Process for filling the area between an upper and an insole, in which the upper is lasted around the insole, which comprises:
- providing footwear comprising an insole and an outsole spaced apart, and an upper lasted around the insole, said outsole having an opening for inserting a liquid into the space between the insole and outsole;
- providing a liquid mixture comprising methylene diisocyanate having an isocyanate content of 15-25% by weight, a polyol having an OH number between 60 and 280, water, and a catalyst for initiating a reaction of the recited ingredients, the weight ratio of the polyol to diisocyanate being between 100:20 and 100:100;
- introducing the liquid mixture through the opening and into said space, causing liquid mixture ingredients to react and foam while filling said space, whereby the foam reaction product is a polyurethane material.
A process for waterproof sealing of the outsole-facing end area of a waterproof shoe shaft and/or for padding the outsole-facing area of a shoe with glued outsole by applying a liquid, curable, waterproof and/or padding filling material in which:
- (a) a polyurethane foam is used as the filling material which foams almost without pressure, which has a high creepability in the liquid state and a high bondability and which is produced by cross-linking using polyol with an OH-number in a range between about 60 and 280 and isocyanate with an NCO-content in a range between about 15 and 25;
- and
- (b) the outsole and/or the insole is provided with an input opening at least at one spot lying within the area enclosed by the end area of the shaft, liquid-filling material is put through the input opening into the space between the insole and the outsole from where the filling material creeps up to the end area of the shaft facing the outsole, due to its high creepability.
A shoe comprising an insole and an outsole spaced apart, and an upper lasted around the insole, in which said space is filled with a foam formed from curing a mixture comprising a liquid mixture comprising methylene diisocyanate having an isocyanate content of 15-25% by weight, a polyol having an OH number between 60 and 280, water, and a catalyst for initiating reaction of the recited ingredients, the weight ratio of the polyol to diisocyanate being between 100:20 and 100:100.
A shoe with a shaft, an insole, an outsole and a filling material in between the insole and the outsole to seal and make waterproof the outsole-side end area of the shaft and/or to pad the shoe towards its outsole side end, characterized in that the shaft is bonded to the outsole in such a way that the outsole and/or the insole is provided with at least one insertion opening for putting in the filling material, said filling material being a polyurethane foam which contains as cross-linking components polyol with an OH-number ranging between about 60 to 280 and isocyanate with an NCO-content ranging between about 15 and 25.
Dependencies are inferred from the claim text.