DE2606281A1 - Multi-layer lining for sports shoes, esp ski boots - comprises air transmitting matl coated with polyurethane foam and close fitting outer cover - Google Patents

Abstract

A multi layer lining for sports shoes e.g. in partic. for the foamed inner shoes of ski boots, having an air transmitting material, partic. a textile or leather with a foamed coating and close fitting outer cover, has the foamed material consisting of a coarse, open celled polyurethane foam or similar matl. which can be severely compressed which is attached to the inner layer whilst retaining its open cellulasity. The covering layer is also of polyurethane, and forms a thin layer which covers the cellular apertures of the foamed material in the manner of a skin.

Description

Multi-layer lining for sports shoes and the like.

The invention relates to a multilayer lining for sports shoes and the like., In particular for foamed inner shoes of ski boots, with one made of air-permeable Material, in particular a knitted fabric or an inner layer made of leather, to which a foam layer adjoins, which with a dense outer cover layer is provided.

Such a lining can, inter alia, become a sock-like cover for a molding is processed, which forms the inner part or core of a mold, in which an inner shoe made of foamed polyurethane is made. Such inner shoes are preferred for shoes and boots with a fully synthetic outer shell, in particular Plastic ski boots, ice skates and other sports shoes are used.

The outer shape of the inner shoe is the inner shape of the boot shaft precisely adapted, whereas the inner shape of the inner shoe and thus the last or Mold core essentially corresponds to the shape of the foot or lower leg.

Corrections of the inner shape for an exact adaptation to the HUßform Attachment of inserts or pads made of cushioning material, plastically deformable material etc. are possible.

Polyurethane foam is usually used as the material for the inner shoe itself used. Normally, during the foaming process, the outer mold is heated or it is foamed under overpressure so that it is on the outside of the inner shoe forms an outer skin that increases wear resistance.

A lining of the type mentioned can also be used in other ski and Sports shoes are glued in place.

In a known multi-layer lining of the type mentioned there is the foam layer made of PVC foam, which is foamed directly onto the inner layer will. To allow the foam to penetrate into the pores or openings of the inner layer To prevent this, it is customary to have this inner layer in front of the coating side applying the PVC foam with a fine coating, e.g. also made of PVC, 9 A thin layer of polyurethane is applied to the outside of the PVC layer, e.g. in the form of a polyurethane coating, indicating which measure is necessary, to ensure good adhesion between the shoe material, especially in the case of foamed inner shoes and to achieve feed.

A particular disadvantage of a layer of PVC foam is the fact that that the degree of elasticity of this foam depends very much on the temperature depends and such a foam layer is essential even at temperatures around + looc is harder than at those temperatures, which they under the influence of body temperature achieved. In In practice, this means that the layer when tightened a ski boot or the like. is relatively hard, making it difficult and difficult to put on short gestation time under the warming by the body temperature gives way, so that the foot loses the desired hold in the ski boot and a tightening of the boot fasteners becomes necessary. Another feed, which is more fine-pored, has the same disadvantages Foam rubber is poured onto a knitted fabric, with the free foam rubber surface a layer of lacquer is applied. This lining is intended for shoes, which Between the upper and the lining there is a subsequent foaming when the shoe is on Gap remains free. Because of the fine pores of the foam rubber, the lining becomes hard the foam rubber must be made with a surface skin to prevent penetration to prevent the paint. This also increases the hardness of the feed.

Based on a feed of the type mentioned, there is the Invention essentially in that the foam layer made of open-cell, coarse-pored, highly compressible polyurethane foam or similar properties Another foam exists, which is connected to the inner layer while maintaining the open-cell structure In the connection area by gluing, flaming or the like. Connected, the The top layer is also made of polyurethane and has a thin-walled, pore or Cell openings of the foam layer closing or covering skin.

In the case of the feed according to the invention, the pores or

Cells of the foam layer connected to the inside of the lining and can therefore absorb moisture, among other things, so that the feed in its entirety becomes highly absorbent.

-The material of the foam layer is highly compressible and suffers when cooling, even to temperatures around or none below 0 0C substantial reduction in inherent elasticity and compressibility. Because of the strong Compressibility of the material of the foam layer makes it possible, among other things, a from a terry cloth, a polyurethane layer of for example 5 mm and one thin outer skin of existing lining when foaming an inner shoe in the mold to compress the initial thickness of the FoTees.toffes by the pressure that occurs, so that the lining in its entirety is practical in the manufacture of the inner shoe does not take up any space in the mold and the mold core or strips used adhere to the Foot shape can be adapted.

In practice, the foam layer is preferably of the order of magnitude a layer thickness of 5mm, a specific weight of 0.05g / cm3, a cell diameter or pore diameter of 0.5 mm on average and compressibility of over 90 °, 4 with a surface load of 0.1 kp / cm2aif. The thickness of the outer skin is of the order of magnitude or less than 0.1 mm. The information given above relate to a preferred lining for foamed liners. Depending on the intended use In practice, the layer thickness is also chosen to be larger or smaller, e.g. 1 cm and also the specific weight as well as the compressibility and the pore size vary depending on the intended use.

Claims (2)

Patent claims: 1. Multi-layer lining for sports shoes and the like, especially for foamed inner boots of ski boards, with one made of air-permeable material, in particular a fabric, knitted fabric or leather existing inner layer, to the one Foam layer adjoins, which is provided with a dense outer cover layer is, characterized in that the foam layer is made of open-cell, coarse-pored, highly compressible polyurethane foam or dgl0 exists, the one with the inner layer while maintaining the open-cell structure by gluing, flaming or the like. is connected, the top layer also consists of polyurethane and single-walled, the pores or cell openings of the foam layer final or covering skin forms. 2. Lining according to claim 1, characterized in that the foam layer of the order of magnitude, a layer thickness of 5 mm, a specific weight of 0.05 g / cm3, a cell or pore diameter of 0.5 mm on average and compressibility of over 90% with a surface load of 0.1 kp / cm2 and the thickness the outer skin is less than 0.1 mm