EP1212953A2 - Watertight shoe - Google Patents

Abstract

A waterproof, water vapour permeable shoe comprises an upper (1), a functional layer (2) in the shape of a sock made from a dispersion or solution of a waterproof, water vapour permeable polymer, a lining (3), and a sole (5). The functional layer has a thickness between 10 and 150 microns, pref.40 to 100 microns, and is attached to the top opening only of the upper, the top portion of which is folded over the ends of the lining and the functional layer and secured by a seam (4). The sole may be secured to the bottom of the shoe by bonding or sewing, and the seam resealed by a further application of waterproof water vapour permeable polymer. Alternatively the sole may be injection moulded and further sealing is unnecessary. Items (1,3,5) may be made from any conventional materials. The functional layer may be adapted to fit a variety of shoe sizes by making a cut in the bottom of the layer and bonding the edges together.

Description

The invention relates to a waterproof, water vapor permeable Shoe construction containing an outer shaft, a waterproof, water vapor permeable functional layer shaft, a feed shaft and a Sole and a method for manufacturing a waterproof shoe.

Such shoe constructions are widely known. For example, in US Re 34 890 describes a shoe construction which has an outer shaft and a contains sock-shaped lining, the lining consisting of a three-layer laminate consists. This laminate is used to make the footwear waterproof and water vapor permeable and typically contains a Functional layer that gives the laminate the waterproof, water vapor permeable Gives property, and more layers of other material, such as includes textile layers, for example.

The production of waterproof, water vapor permeable shoe constructions Using laminates is very expensive because the production of the three-dimensional shoe shape from two-dimensional laminates only through Cutting into fittings and subsequent joining, preferably sewing the fittings can be made, after which the joints, in the case of seams the seams, then resealed to ensure water resistance of the three-dimensional structure thus formed.

In the embodiment known from US Re 34 890 one is made from the laminate sock-shaped three-dimensional structure, which is then in the Outer shaft is introduced. This sock-shaped three-dimensional structure can can only be achieved by several seams from the two-dimensional laminate. each the individual seam must then be sealed again in order to To achieve watertightness of this sock-shaped three-dimensional structure.

A laminate can be produced, for example, by the individual Layers that are to form the laminate, for example a first layer from one Functional layer and at least a second layer to be glued together. The functional layer is watertight, while the other layers, the usual way textile fabrics, such as fabric or Knitted fabrics are permeable to water vapor, but are not waterproof. If so different layers are glued together flatly, the surface hampers applied adhesive the water vapor permeability of the functional layer, so that the finished laminate has a lower water vapor permeability than that Functional layer alone. That is why such laminates are often produced in such a way that the individual layers are connected using distributed adhesive dots. Nevertheless, the number of glue dots with this method is still so high that here too a reduction in the water vapor permeability of the laminate compared to the functional layer alone.

It is often difficult to ensure the tightness of the necessary seams, too when the seams have been sealed again, because every seam and also the threads of the Transport textile fabrics into the interior via capillary forces can. You also have to make sure that the seal is through the textile Flat structures penetrate through to the functional layer, since the connection of the functional layer molded parts, which are from the sealing side behind the textile Fabrics are arranged, which must be sealed, which is not always completely successful. Furthermore, when using the shoe construction, it can occurring stress that the seams are sealed dissolves again, so that watertightness is no longer guaranteed in such places is.

It is also the case with the above-described types of production of waterproof, Water vapor permeable shoe constructions required for every shoe size a three-dimensional structure from the Form laminate. This also increases production costs.

Another problem is that so far the manufacturing of constructions used in waterproof, water vapor permeable shoes are different from the shoe constructions that are used for other shoes were used. In this respect, there is a variety of designs that can be applied to one Series production has a very costly impact.

The object of the present invention is a shoe construction of the beginning to provide the type mentioned, in which the problems described above are at least reduced.

This task is solved with a waterproof, water vapor permeable Shoe construction containing an outer shaft, a waterproof, water vapor permeable functional layer shaft, a feed shaft and a Sole, in that both the waterproof, water vapor permeable Functional layer shaft and the lining shaft are sock-shaped and are separately introduced into the shoe.

According to the invention, the term "separately introduced" means that Functional layer shaft and feed shaft in the manufacture of the invention Shoe construction are made separately and only when building the shoe construction according to the invention are merged. functional layer and lining are therefore not built up together as a laminate to form a shaft. This feature can also be clearly seen in the finished shoe construction.

In the event that the functional layer shaft is sewn together from molded parts, it can be clearly seen that the seam is only in and on the functional layer is arranged. The feed shaft can, for example, be shaped or Form knitting be made and then has no seams. If the Feed shaft is also sewn together from molded parts, these seams are only associated with the feed of the feed shaft. So there is not a single seam at the same time molded parts of the feed shaft and molded parts of the functional layer shaft combines.

In the case of seamless functional layer shafts, it is also clearly recognizable that The functional layer shaft and the feed shaft were present separately, since even then, when the two shafts are connected, it is clear that the Connection of the two shafts only after the two shafts have been manufactured separately can be done.

Because the functional layer shaft and the lining shaft are separate in the outer shaft can be used for the production of waterproof, Construction permeable to water vapor is also provided on simple Way can also be used for other (not inventive) shoes by is omitted in the production of the functional layer shaft. In this way the variety of varieties can be significantly reduced by the shoe manufacturers.

The shoe construction according to the invention can be manufactured particularly inexpensively if the functional layer shaft and the lining shaft are only on an upper one Opening the shoe construction through which a foot is inserted with the Outer shaft is connected. This will repair the Footwear according to the invention increased significantly. Because functional layer shaft and Feed shaft can only be connected to the outer shaft at the upper opening Functional layer shaft and lining shaft from the inside of the shoe be pulled out before repairs to the rest of the footwear be made without the usually sensitive, thin Functional layer shaft is endangered. The functional layer shank can also be In the event of a leak, replace it easily as there is only one connection to the Outside shaft must be renewed.

For the connection at the upper opening, it is particularly useful if the Outer shaft at the upper opening over the functional layer shaft and the Feedstock is folded to connect the functional layer and To form feed stock.

The shoe construction according to the invention is characterized in that the Functional layer shaft is composed of individual parts, which over seams are joined together and the seams are sealed.

Because the functional layer shaft and the lining shaft are separate in the shoe are introduced, special care in the formation of the sock shape of the Functional layer shaft can be used. If the sock shape of the Functional layer stock from a flat, two-dimensional functional layer takes place, the individual fittings cut from the functional layer were connected much easier again. In the simplest Way, the connection of the fittings by gluing or welding can be achieved. The connection of the fittings can also be done by sewing done, the subsequent sealing is much less problematic, because there is no textile structure on the functional layer which Laminates make it difficult to seal the seams. He also needs at Sealing these seams to the adhesive to be used only on one material, namely to be matched to that of the functional layer, which creates a permanent Sealing is much easier to do.

It is particularly advantageous if the functional layer shank is seamless.

For this purpose, the functional layer shaft of the shoe construction according to the invention be directly sock-shaped, i.e. three-dimensional, and no seams or have other connection points. Such a functional layer shaft can produced for example by the method described in EP 0 665 259 A1 according to which three-dimensional articles are achieved by a three-dimensional form with an aqueous dispersion of a copolyetherester is coated at least once, analogously to latex dispersions of the Rubber industry, for example, after expelling the water Heat to get a film that is peeled from the mold. To become one To arrive at the shoe construction according to the invention has to manufacture the Functional layer shaft shape used, the three-dimensional shape of a sock or the outer contour of a foot.

In this respect, the shoe construction according to the invention is particularly distinguished characterized in that the functional layer shaft by coating a foot shape in a dispersion or solution containing a polymer and subsequent Reshaping the polymer into a film is made.

To in the shoe construction according to the invention in seamlessly manufactured Functional layer shafts the number of different shoe sizes to reduce the required functional layer shafts, it has proven particularly useful if an initially seamless functional layer shaft in the sole area is cut open and the cut edges are connected by a seam.

By pulling the cut edges together to different degrees Sewing together can have different sizes of the functional layer shaft can be achieved. The remnants of the cut edges protruding over the seam can be cut off before or after sewing together or otherwise be removed.

It is also possible to cut open the underside of the functional layer shaft and to introduce an insole, which is then connected to the functional layer upper becomes part of the functional layer shaft.

It has been used to stabilize the functional layer upper in the sole area proven when the functional layer upper is connected to an insole.

Here, the functional layer shaft with the insole over a seam be connected. As already stated above, such a seam can be inexpensive be sealed because the functional layer shaft is separated from the feed shaft is introduced and thus the textile structure forming the feed shaft at Sealing is not a hindrance.

It is particularly advantageous if the seams on the Functional layer shaft are attached by coating with a waterproof polymer-containing dispersion or solution are sealed. Dispersions or solutions penetrate favorably into those formed by the seams Holes in the insole and in the functional layer and in the seams contained capillaries so that after hardening of the in this dispersion or Solution contained polymer has a good seal.

Particularly good results are achieved if this is done in the dispersion or Solution containing polymer is selected from the same group as the polymer, from which the functional layer shaft is made.

It is particularly advantageous here if this is in the dispersion or solution polymer contained after coating waterproof and is permeable to water vapor.

If desired, the functional layer shaft can be connected to the feed shaft his. The connection between the functional layer shaft and the feed shaft can be released be trained, but it can also have a variety of adhesive dots with the Feed shafts are accomplished. Here it has proven to be particularly cheap emphasized if the adhesive dots are designed to be activated under heat. The Glue dots can be attached to the feed shaft or on in a particularly simple manner Apply the inside of the functional layer shaft inside out before this is introduced into the shoe construction. In the same way, the Functional layer shaft are connected to the outer shaft. By then applying heat in the form of air or a hot last then the feed shaft with the functional layer shaft or the Functional layer shaft connected to the outer shaft.

The shoe construction according to the invention is also characterized in that the Functional layer shaft is connected to the sole, being special It is useful if the functional layer shaft, the outer shaft and the sole are interconnected.

It is advantageous if the functional layer shaft, the outer shaft and the Sole are connected by a seam and the seam is sealed.

Alternatively, the shoe construction according to the invention is characterized in that Outer shaft and functional layer shaft combined with a molded-on sole are.

• Herstellen des Außenschaftes,
• Herstellen eines wasserdichten, wasserdampfdurchlässigen Funktionsschichtschafts in Form eines Sockens,
• Herstellen eines Futterschafts in Form eines Sockens,
• Einbringen des Funktionsschichtschafts in den Außenschaft,
• Einbringen des Futterschafts in den Funktionsschichtschaft,
• Anfügen der Sohle von unten.

The object of the invention is also achieved by a method for producing a waterproof, water vapor-permeable shoe, characterized by the following steps:

• Manufacture of the outer shaft,
• Manufacture of a waterproof, water vapor-permeable functional layer shaft in the form of a sock,
• Production of a feed shaft in the form of a sock,
• Inserting the functional layer shaft into the outer shaft,
• Inserting the feed shaft into the functional layer shaft,
• Attach the sole from below.

The insertion of the feed shaft into the functional layer shaft can also take place outside the outer shaft, then the functional layer shaft be introduced into the outer shaft together with the feed shaft.

It can be advantageous here if the functional layer shaft is on the inside or the feed shaft is equipped with adhesive dots on the outside which after inserting the functional layer shaft into the outer shaft and after inserting the feed shaft into the functional layer shaft of the Functional layer shaft are connected to the feed shaft.

The invention is explained in more detail with reference to the following figures.

Figur 1

den Querschnitt eines erfindungsgemäßen Schuhs,

Figur 2

den Querschnitt eines erfindungsgemäßen Schuhs mit angespritzter Laufsohle,

Figur 3

die Sicht auf einen Funktionsschichtschaft von unten, welcher aufgeschnitten und wieder zusammengenäht ist,

Figur 4

einen Ausschnitt des aufgeschnittenen und wieder zusammengenähten Funktionsschichtschafts gemäß Figur 3,

Figur 5

den Ausschnitt gemäß Figur 4, bei dem die Naht über einen Kleber auf einem Band abgedichtet ist,

Figur 6

den Querschnitt eines Schuhs, bei dem bei einem Funktionsschichtschaft der untere Teil entfernt und durch eine Brandsohle ersetzt ist.

Show it:

Figure 1

the cross section of a shoe according to the invention,

Figure 2

the cross section of a shoe according to the invention with molded outsole,

Figure 3

the view of a functional layer shaft from below, which is cut open and sewn together again,

Figure 4

3 shows a section of the functional layer shaft cut open and sewn together again, as shown in FIG. 3,

Figure 5

the section according to FIG. 4, in which the seam is sealed on an adhesive tape,

Figure 6

the cross section of a shoe, in which the lower part of a functional layer shaft is removed and replaced by an insole.

According to FIG. 1, the shoe construction according to the invention consists of an outer shaft 1, a functional layer shaft 2, a lining shaft 3 and a sole 5, which in the construction shown in FIG. 1 represents a glued-on outsole and in FIG. 2 an injection-molded outsole. The functional layer shaft 2 is arranged between the outer shaft 1 and the chuck shaft 3.
In the footwear according to the invention, the upper edge of the outer shaft 1 can be folded over the upper edge of the functional layer shaft 2 and the upper edge of the lining shaft 3 and sewn over the seam 4. One of the preferred constructions of the footwear according to the invention is characterized in that the seam 4 is the only connection between the functional layer shaft and the lining shaft. This construction is particularly inexpensive to manufacture.
On the underside, the outer shaft is connected to an outsole 5, preferably by gluing or sewing. The adjacent areas of the functional layer shaft 2 and the outsole 5 can be connected to one another, for example with the aid of adhesives or seams. If the functional layer shaft 2 is sewn to the outsole 5, care must be taken that the seam is then sealed again, as described above.

According to FIG. 2, a molded part is molded onto the shoe construction according to the invention Shoe sole 6 used. In this case, the material used to manufacture seals the molded sole is used, all seams in the sole area and also penetrates between the spaces between outer shaft 1 and Functional layer shank 2 or other cavities that arise during manufacture. In this way, the lower area of the footwear is waterproofed. In this respect, also in the case when the functional layer shaft 2 below is cut open and sewn again, the resulting seam of the Functional layer shaft sealed by the sole material.

Such seams in the functional layer shaft do not disturb the wearer of the shoe, since the functional layer shaft usually consists of a very thin functional layer is built up, for example, has a thickness of 10 to 150 microns, so that Hardly apply folds and seams and are therefore caught by the feed shaft become.

The materials from which the outer shaft 1, the functional layer shaft 2 and the Feed shaft 3 are made are generally known in the art. A Such materials are listed, for example, in US Pat. No. 5,678,236.

The outer shaft can, for example, be made of leather, synthetic leather, textiles, fabrics, Canvas, chintz, terry cloth, velvet, Manchester velvet, corduroy, cotton velvet, Muslin, satin, fur or similar materials.

The feed shaft can be made of terry, goatskin, sheepskin, cowhide, Pig leather, velvet, camel hair, fabric, knitted or woven material, Cotton, wool, synthetic fibers or cellulosic material exist.

The outsole should be made of waterproof material such as Rubber, polyurethane, polyvinyl chloride and its derivatives, or mixtures thereof Materials.

The functional layer shaft consists of a waterproof, water vapor permeable material and can be produced for example from polymers that are able to form a microporous polymeric matrix, such as for example, described in US 5,732,479. But materials also come in Question that are not porous, but waterproof and permeable to water vapor. Suitable polymers for this are polyolefins, polyethylene-propylene copolymers, Polyethylene, terephthalate, polycaprolactam, polyvinylidene fluoride, Polybutylene terephthalate, polyester copolymers, polytetrafluoroethylene and Copolyetheresters. The material of the functional layer shaft can also be several Have layers of different polymers. For example, a porous polytetrafluoroethylene film have a second layer of polyurethane.

If the functional layer shaft is produced by coating a mold, can a multi-layer functional layer shaft can also be produced there, in which one the mold is first coated with a dispersion or solution with a polymer, the polymer cures and then the resulting film with a dispersion or Solution coated with a second polymer and the polymer hardens and so further. An easy way to coat a mold is by dipping the Form can be achieved in the dispersion or solution. The layer is still closed formed thin, the mold can be dipped several times until the layer on the Form has the desired thickness. Preferred thicknesses for the functional layer are 10 to 150 μm, preferably 40 to 100 μm.

A functional layer shaft made of copolyetherester, which material under the Trademark SYMPYTEX has become known for the invention Shoe construction ideally suited.

According to Figure 3, a functional layer shaft 2 is shown from below, which was cut in a line along line 7. As shown in Figure 4, are the cut edges 13a and 13b are sewn together via the seam 8. The cut edges can also be connected by gluing. If the cut edges are too long, can be easily shortened by cutting. On this simple one It is possible to attach the functional layer shank in a simple manner to adapt different shoe sizes.

In FIG. 5, a seam according to FIG. 4 illustrates how such a seam is effective can be sealed by the adhesive comprising the cut edges 13a and 13b and thus closes the gap that may exist between them. The glue can be covered by a tape 9. In the field of processing waterproof, water vapor permeable functional layers have become Adhesive tapes that consist of a tape and a polymer layer on it exist, whereby the polymer layer becomes liquid by heat and as a dense adhesive acts, well proven. The tapes can be easily attached to the seam for example, be ironed on with an iron.

In a further embodiment according to FIG. 6, the sole area of the Functional layer shaft cut out and replaced by an insole 11. The Insole 11 is connected to the functional layer shank via a seam 12, so that in this embodiment the functional layer 2 with the insole together forms the functional layer shaft. If in the area of the insole waterproofness is also required, the insole can be made from one waterproof and possibly water vapor permeable material. In in this case the seam 12 should also be sealed watertight. This too It is possible by using insoles of different sizes Adapt functional layer shaft to different shoe sizes.

Claims (22)

Waterproof, water-vapor-permeable shoe construction, comprising an outer shaft, a waterproof, water-vapor-permeable functional layer shank, a lining shaft and a sole, characterized in that both the waterproof, water-vapor-permeable functional layer shaft and the lining shaft are of sock-shaped design and are separately introduced into the shoe. Shoe construction according to claim 1, characterized in that the functional layer shaft and the lining shaft are connected to the outer shaft only at an upper opening of the shoe construction, through which a foot is inserted. Shoe construction according to claim 1 or 2, characterized in that the outer shaft is folded at the upper opening over the functional layer shaft and the lining shaft to form the connection between the functional layer shaft and lining shaft. Shoe construction according to one or more of claims 1 to 3, characterized in that the functional layer shaft is composed of individual parts which are connected to one another via seams and the seams are sealed. Shoe construction according to one or more of claims 1 to 3, characterized in that the functional layer shaft is seamless. Shoe construction according to claim 5, characterized in that the functional layer shaft is produced by dipping a foot shape into a dispersion or solution containing a polymer. Shoe construction according to claim 6, characterized in that an initially seamless functional layer upper is cut open in the sole region and the cut edges are connected to one another via a seam. Shoe construction according to one or more of claims 1 to 7, characterized in that the functional layer upper is connected to an insole. Shoe construction according to claim 8, characterized in that the functional layer shaft is connected to the insole via a seam Shoe construction according to one or more of claims 6 to 9, characterized in that the seams are sealed by coating with a dispersion or solution containing a waterproof polymer. Shoe construction according to claim 10, characterized in that the polymer contained in the dispersion or solution is selected from the same group as the polymer from which the functional layer upper is made. Shoe construction according to claim 11, characterized in that the polymer contained in the dispersion or solution is waterproof and water vapor permeable after coating. Shoe construction according to one or more of claims 1 to 12, characterized in that the functional layer shaft is connected to the lining shaft. Shoe construction according to claim 13, characterized in that the functional layer shaft is releasably connected to the lining shaft. Shoe construction according to claim 13, characterized in that the functional layer shaft is connected to the lining shaft via a plurality of adhesive points. Shoe construction according to claim 15, characterized in that the adhesive dots are designed to be activated under heat. Shoe construction according to one or more of claims 1 to 16, characterized in that the functional layer shaft is connected to the sole. Shoe construction according to claim 17, characterized in that the functional layer shaft, the outer shaft and the sole are connected to one another. Shoe construction according to claim 18, characterized in that the functional layer shaft, the outer shaft and the sole are connected via a seam and the seam is sealed. Shoe construction according to one or more of claims 1 to 17, characterized in that the outer shaft and functional layer shaft are connected to a molded-on sole. Process for the production of a waterproof, water vapor permeable shoe, characterized by the following steps: Manufacture of the outer shaft, Manufacture of a waterproof, water vapor-permeable functional layer shaft in the form of a sock, Production of a feed shaft in the form of a sock, Inserting the functional layer shaft into the outer shaft, Inserting the feed shaft into the functional layer shaft, Attach the sole from below. A method according to claim 22, characterized in that the functional layer shaft is equipped on the inside with adhesive points, via which the functional layer shaft is connected to the lining shaft after the functional layer shaft has been introduced into the outer shaft and after the feed shaft has been introduced into the functional layer shaft.

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