EP4149314A1

EP4149314A1 - High-heeled shoe comprising a main body produced by a 3d printing process

Info

Publication number: EP4149314A1
Application number: EP21725770.8A
Authority: EP
Inventors: Florian Fischer
Original assignee: BASF SE
Current assignee: BASF SE
Priority date: 2020-05-15
Filing date: 2021-05-14
Publication date: 2023-03-22
Also published as: KR20230006022A; CN115666312A; US20230189928A1; WO2021229068A1; JP2023526326A

Abstract

The present invention relates to a high-heeled shoe comprising an insole (E) and a main body (G), wherein the main body (G) is produced as a single part using a 3D printing process. The insole (E) comprises a flat section (EF), having an upper face (EO) and a lower face (EU), wherein a heel (A) is formed on the lower face (EU). The main body (G) comprises a base (F) and an inner tongue (I), wherein the base (F) has an upper face (FO), a lower face (FU) and a first cavity (H1), and the inner tongue (I) has an upper face (IO) and a lower face (IU), wherein the lower face (IU) of the inner tongue (I) is connected to the upper face (FO) of the base (F) of the main body (G) such that a second cavity (H2) is formed between the lower face (IU), the upper face (FO) and the first cavity (H1), which second cavity forms an overall cavity (HG) with the first cavity (H1), wherein the overall cavity (HG) corresponds substantially to the shape of the insole (E). The insole (E) is positioned in the overall cavity (HG) such that the lower face (EU) of the flat section (EF) of the insole (E) is fully in contact with the upper face (FO) of the base (F) of the main body (G), and the lower face (IU) of the inner tongue (I) completely covers the upper face (EO) of the flat section (EF) of the insole (E). The present invention further relates to a method for producing the high-heeled shoe and to the use of an inner tongue (I) for completely covering the upper face (EO) of the flat section (EF) of an insole (E) in a high-heeled shoe.

Description

High-heel shoe comprising a base body produced using a 3D printing process

description

The present invention relates to a high-heel shoe comprising an insert (E) and a base body (G), the base body (G) being produced as an individual part using a 3D printing process. The insert (E) comprises a surface (EF) which has an upper side (EO) and an underside (EU), a shoulder (A) being formed on the underside (EU). The base body (G) comprises a base (F) and an inner flap (I), the base (F) having an upper side (FO), a lower side (FU) and a first cavity (H1), and the inner flap (I) has a top (IO) and a bottom (IU), the bottom (IU) of the inner flap (I) being connected to the top (FO) of the base (F) of the base body (G) in such a way that between the bottom (IU ), the top (FO) and the first cavity (H1) a second cavity (H2) is formed, which forms a total cavity (HG) with the first cavity (H1), the total cavity (HG) essentially having the shape of the insert (E) corresponds to. The insert (E) is positioned in the overall cavity (HG) in such a way that the bottom (EU) of the surface (EF) of the insert (E) is completely in contact with the top (FO) of the base (F) of the base body (G) and the lower side (IU) of the inner flap (I) completely covers the upper side (EO) of the surface (EF) of the insert (E). The present invention also relates to a method for producing the high-heel shoe and the use of an inner flap (I) to completely cover the upper side (EO) of the surface (EF) of an insert (E) in a high-heel shoe.

The manufacture of shoes, which is also known as “shoe construction” in a professional manner, comprises a large number of work steps and is basically the same for all shoe shapes, for example low shoes and ankle boots. A shoe normally comprises an upper part, the upper, and a lower part, the floor or the sole, the upper and the sole being connected to one another. In the case of bespoke shoes, the shoemaker adapts the shaft and sole to the individual shape of the feet. Shoes that are manufactured in industrial mass production are based on fixed clothing sizes, i.e. average values that are used for the last construction of the shoe.

The lasts that reshape the foot form the basis for every pair of shoes. They take size and shoe model into account and are also responsible for wearing comfort. Standardized lasts for "average feet" are used for industrially manufactured shoes. Moldings are traditionally made from solid wood such as beech. Especially in the shoe industry too Plastic strips or aluminum strips used. As a rule, a right and a left last (pedal last) are made.

Depending on the shoe model, the bottom of the shoe consists of one or more soles. A moccasin, for example, is characteristic of a shoe with only one sole. Otherwise, shoes usually have two or more soles: the inner sole (insole) and the outer sole. In addition, some shoes are equipped with additional, cushioning midsoles or additional insoles between the insole and the outsole. To produce the upper, the shoemaker or stock maker designs a pattern for the upper parts based on a copy of the last. Using this pattern, the individual shaft parts are cut or punched and sewn or glued. Good uppers consist of an inner upper (lining), an intermediate upper (intermediate lining) and an outer upper (upper material).

The actual shoe construction takes place in such a way that the shaft is stretched over the last with shaft pliers, shaped and connected (pinched) to the insole. Depending on the design, this connection is flexibly sewn, sewn through or welted. In mass production, the shaft and the insole are often glued.

At the end of the shoe manufacturing process, the shaping last is pulled out of the finished shoe. This strenuous work is done both by hand and by machine.

The individual parts of the upper and the sole (s) usually contain a large number of different materials and are usually manufactured separately using different processes. For example, the materials for the sole (s) and the upper are selected from real leather, synthetic leather, various other polymers and cardboard. If the upper and the sole (s) contain a polymer, they are usually manufactured by injection molding into a mold.

A high-heel shoe usually contains a particularly large number of individual materials: For example, it can include an outsole made of a thermoplastic rubber, a heel made of an acrylonitrile-butadiene-styrene copolymer with a metal insert, an insole made of an ethylene-vinyl acetate copolymer Foam and a shaft made of a polyvinyl chloride layer (artificial leather) and a polyester layer, the individual components preferably being produced individually via an injection molding process and then connected to one another.

The disadvantage here is that many different individual parts have to be connected to one another, which involves a large number of work steps and is therefore very time-consuming and is expensive. In addition, the resulting high-heel shoe is difficult to recycle because of the many different materials.

Further costs arise from the fact that a last is usually required for the production of every high-heel shoe. In addition, if the sole (s) and the upper are manufactured using an injection molding process, a mold is required for each sole and each upper. Post-processing steps are also often necessary after injection molding, for example cutting off unwanted parts.

EP 3 381 314 and US 2018/0271211 disclose a midsole for footwear that contains a three-dimensional mesh. The entire midsole or the three-dimensional mesh can be manufactured using an additive manufacturing process.

US 2014/0109441 describes a shoe construction that contains a sole made of sintered material. The shoe construction is drainable and can be used as a shower shoe.

WO 2019/160632 discloses the processing of a sintering powder that can be used to produce a sole structure for footwear.

The object on which the present invention is based is to provide a new method for producing a high-heel shoe or a new high-heel shoe as such.

This object is achieved by a high-heel shoe comprising the following components: an insert (E) which comprises a surface (EF) which has an upper side (EO) and an underside (EU), with the underside (EU) a shoulder (A) is formed, and a base body (G) which comprises a base (F) and an inner tab (I), the base (F) having a top (FO), a bottom (FU) and a first cavity (H1), and the inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap (I) so with the upper side (FO) of the base (F) of the base body ( G) is connected that between the bottom (IU) of the inner flap (I), the top (FO) of the base (F) and the first cavity (H1), a second cavity (H2) is formed, which is connected to the first Cavity (H1) forms a total cavity (HG), the total cavity (HG) essentially corresponding to the shape of the insert (E), the insert (E) being positioned in the total cavity (HG) in such a way that the underside (EU) the surface (EF) of the insert (E) is completely in contact with the top (FO) of the base (F) of the base body (G) and the bottom (IU) of the inner flap (I) the top (EO) of the surface (EF) of the insert (E) is completely covered and the base body (G) is produced as an individual part using a 3D printing process.

The use of the 3D printing process in the method according to the invention for producing the high-heel shoe allows the base body (G) to be produced without the use of casting molds. Instead, the base body (G) is produced layer by layer. By saving on, or doing without, casting molds, the costs for the manufacturer in the case of small series of the high-heel shoe according to the invention and thus for the buyer are reduced considerably.

In addition, the base body (G) is produced as an individual part from a single material using a single process, while the base body (G) from the prior art each contain several different elements made of different materials, which are optionally produced using different processes and are also joined together have to. By using a 3D printing process in the production of the high-heel shoe according to the invention, work steps such as gluing individual elements, such as the base and the inner tab, are saved and the resulting high-heel shoe according to the invention is easier to use recycle versus prior art high heel shoes.

In addition, the use of a 3D printing process in the production of high-heel shoes makes it easier to customize the high-heel shoe, as there is no need to make a large number of molds. For example, the base body (G), in particular its base (G), its inner tab (I) and possibly its shaft (S), and / or the insert (E) can be individually adapted to the length and width of a foot of a high heel. Shoe wearer as well as their weight and gait.

Another advantage of the method according to the invention for producing a high-heel shoe is that no post-treatment steps, such as cutting off unwanted parts, are necessary after the production of the base body (G). This also improves the consistency and reproducibility in the manufacture of the high-heel shoe. In cases in which the high-heel shoe according to the invention contains a thermoplastic polymer such as thermoplastic polyurethane (TPU), polyethylene (PE), polystyrene (PS) or polypropylene (PP), this can be a regenerative thermoplastic polymer that is used for Example was obtained from marine waste.

Furthermore, it is advantageously possible, in the event that the underside (IU) of the inner flap (I) is not irreversibly connected to the upper side (EO) of the surface (EF) of the insert (E), to lift the inner flap (I) and the Replace insert (E).

The high-heel shoe according to the invention also has a high level of stability, even while walking. Even after a large number of loads, no external damage, for example to paragraph (A), can be seen.

The high-heel shoe according to the invention and the method according to the invention for its production are explained in more detail below.

The term “high heel shoe” is known to the person skilled in the art. A high-heel shoe usually comprises a heel (A), which preferably has a height of at least 3 cm, more preferably of at least 4 cm, and most preferably of at least 5 cm. The paragraph (A) can have any three-dimensional geometric shapes, for example it can have the shape of a cube or a cylinder. Depending on the shape of paragraph (A), paragraph (A) can be referred to as a stiletto, block or funnel heel, for example.

The high-heel shoe according to the invention comprises an insert (E) and a base body (G). In addition, the high-heel shoe can also contain further components, for example at least one further component selected from the group consisting of a heel cap, a metal insert, an outsole and an insole.

It is also possible that the high-heel shoe according to the invention comprises, in addition to the insert (E) and the base body (G), an upper (S1), the upper (S1) containing at least one third thermoplastic polymer (TP3) which preferably differs from the at least one second thermoplastic polymer (TP2) described below, and wherein the base body (G) and the shaft (S1) are each produced using a 3D printing process.

The at least one third thermoplastic polymer (TP3) is preferably a polyamide. The present invention also relates to an upper (S1) containing at least one third thermoplastic polymer (TP3), preferably a polyamide, for use in a high-heel shoe, the upper (S1) being produced using a 3D printing process is.

Two shafts (S1) produced using a selective laser sintering process are shown in FIGS. 6 and 7.

The insert (E) comprises a surface (EF) which has an upper side (EO) and an underside (EU), a shoulder (A) being formed on the underside (EU).

In the context of the present invention, the expression “paragraph (A)” is understood to mean a raised part on the underside (EU) of the surface (EF) of the insert (E). This raised part can have any three-dimensional geometric shape, preferably it has the shape of a cube, a cuboid or a cylinder.

If the shoulder (A) has the shape of a cube, the edge length of the cube is preferably at least 3 cm, more preferably at least 4 cm and most preferably at least 5 cm.

If the shoulder (A) has the shape of a cuboid, at least one edge length of the cuboid is preferably at least 3 cm, more preferably at least 4 cm and most preferably at least 5 cm.

If the shoulder (A) is in the form of a cylinder, the height of the cylinder is preferably at least 3 cm, more preferably at least 4 cm and most preferably at least 5 cm.

It is clear to a person skilled in the art that the above-mentioned edges mean the edges which extend from the underside (EU) of the surface (EF) of the insert (E) to a lower end of the paragraph (A). In the context of the present invention, the “lower end of paragraph (A)” is understood to mean the end of paragraph (A) close to the substrate. The edge lengths mentioned above thus correspond to the height of paragraph (A). Furthermore, it is clear to the person skilled in the art that the above-mentioned height of the cylinder means the height that extends from the underside (EU) of the surface (EF) of the insert (E) to a lower end of the paragraph (A) extends. It therefore corresponds to the height of paragraph (A).

The surface (EF) is preferably curved. It preferably has a heel end and a toe end. The shoulder (A) is preferably formed on the underside (EU) of the heel end. If the surface (EF) is curved, the top of the Paragraph (A), which begins on the underside (EU) of the surface (EF) of the insert (E), also preferably curved. In this case, the height of the paragraph (A) corresponds to the length of the edge with the maximum length or the maximum height of the cylinder.

The insert (E) can be produced by any method known to the person skilled in the art. The insert (E) is preferably produced using a 3D printing process or an injection molding process, more preferably an injection molding process.

The insert (E) can be made, for example, of polyamide, polypropylene, polyester, polyurethanes or a thermoset.

In the context of the present invention, the insert (E) preferably contains at least one first thermoplastic polymer (TP1), preferably a polyamide (PA).

A particularly suitable polyamide (PA) is, for example, polyamide 11 (PA 11).

In addition, the insert (E) can contain at least one further component selected from the group consisting of reinforcing agents and additives.

In the context of the present invention, a reinforcing agent is understood to mean a material which improves the mechanical properties of shaped bodies (here the insert (E)) compared to shaped bodies (inserts (E)) which do not contain the reinforcing agent.

Reinforcing agents as such are known to the person skilled in the art. The reinforcing means can be, for example, spherical, platelet-shaped or fibrous.

The reinforcing agent is preferably platelet-shaped or fibrous.

A "fibrous reinforcing agent" is understood to mean a reinforcing agent in which the ratio of the length of the fibrous reinforcing agent to the diameter of the fibrous reinforcing agent is in the range from 2: 1 to 40: 1, preferably in the range from 3: 1 to 30: 1 and in particular preferably in the range from 5: 1 to 20: 1, the length of the fibrous reinforcing agent and the diameter of the fibrous reinforcing agent being determined by microscopy by means of image evaluation on samples after incineration, at least 70,000 parts of the fibrous reinforcing agent being evaluated after incineration. The length of the fibrous reinforcing agent is then usually in the range from 5 to 1000 μm, preferably in the range from 10 to 600 μm and particularly preferably in the range from 20 to 500 μm, determined by microscopy with image evaluation after ashing

The diameter is then, for example, in the range from 1 to 30 μm, preferably in the range from 2 to 20 μm and particularly preferably in the range from 5 to 15 μm, determined by microscopy with image evaluation after ashing.

In a further preferred embodiment, the reinforcing agent is plate-shaped. In the context of the present invention, “platelet-shaped” is understood to mean that the particles of the at least one reinforcing agent have a diameter to thickness ratio in the range from 4: 1 to 10: 1, determined by microscopy with image evaluation after incineration.

Suitable reinforcing agents are known to the person skilled in the art and are selected, for example, from the group consisting of carbon nanotubes, carbon fibers, boron fibers, glass fibers, glass spheres, silica fibers, ceramic fibers, basalt fibers, aluminum silicates, aramid fibers and polyester fibers.

Additives as such are also known to the person skilled in the art. For example, the additive is selected from the group consisting of anti-nucleating agents, stabilizers, conductive additives, end group functionalizers, dyes, antioxidants (preferably sterically hindered phenols) and colored pigments.

A suitable anti-nucleating agent is, for example, lithium chloride. Suitable stabilizers are, for example, phenols, phosphites and copper stabilizers. Suitable conductive additives are carbon fibers, metals, stainless steel fibers, carbon nanotubes and carbon black. Suitable end group functionalizers are, for example, terephthalic acid, adipic acid and propionic acid. Suitable dyes and color pigments are, for example, carbon black and iron chromium oxides.

A suitable antioxidant is, for example, Irganox® 245 from BASF SE.

An insert (E) according to the invention is shown schematically in FIG. It comprises a surface (EF) which has an upper side (EO) and a lower side (EU), a shoulder (A) being formed on the lower side (EU). The heel (A) is formed on the underside (EU) of the heel end. The surface (EF) is curved.

The base body (G) comprises a base (F) and an inner tab (I). Optionally, the base body (G) can also comprise a shaft (S) in addition to the base surface (F) and the inner link (I). The base (F) has an upper side (FO), an underside (FU) and a first cavity (H1). The base area (F) preferably has, like the insert (E), a heel end and a toe end. The first cavity (H1) is preferably positioned at the heel end of the base (F).

The inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap (I) being connected to the upper side (FO) of the base (F) of the base body (G), that between the underside (IU) of the inner link (I), the upper side (FO) of the base (F) and the first cavity (H1), a second cavity (H2) is formed which, together with the first cavity (H1), forms a total cavity ( HG), the overall cavity (HG) essentially corresponding to the shape of the insert (E).

In FIG. 2, a base body (G) according to the invention, initially without an inner tab (I), is shown schematically. It comprises a base area (F) which has an upper side (FO), an underside (FU) and a first cavity (H1). Furthermore, the base body (G) also has a shaft (S). The first cavity (H1) is positioned at the heel end of the base (F). A second cavity (H2) is formed between the bottom (IU) of the inner link (I) (not shown), the top (FO) of the base (F) and the first cavity (H1). In Figure 3, a base body (G) according to the invention including the inner tab (I) is shown schematically. It comprises a base (F), an inner link (I) and a shaft (S). The base (F) has an upper side (FO), an underside (FU) and a first cavity (H1). The inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap (I) being connected to the upper side (FO) of the base (F) of the base body in such a way that between the Underside (IU) of the inner flap (I), the upper side (FO) of the base (F) and the first cavity (H1) a second cavity (H2) is formed, which forms a total cavity (HG) with the first cavity (H1) , the total cavity (HG) essentially corresponding to the shape of the insert (E).

In the context of the present invention, the expression "substantially corresponds to the shape of the insert (E)" means that the insert (E) has a shape that is preferably at least 90%, more preferably at least 95%, particularly preferably at least 98% and in particular 100% of the shape of the total cavity (HG), and has a size that preferably corresponds to at least 90%, more preferably at least 95%, particularly preferably at least 98%, and in particular 100% of the size of the total cavity (HG) . The base body (G) preferably contains at least one second thermoplastic polymer (TP2). In a preferred embodiment, the at least second thermoplastic polymer (TP2) is different from the at least one first thermoplastic polymer (TP1).

The at least one second thermoplastic polymer (TP2) is preferably selected from the group consisting of impact-modified vinyl aromatic copolymers, thermoplastic styrene-based elastomers (S-TPE), polyolefins (PO), aliphatic-aromatic copolyesters, polycarbonates, thermoplastic polyurethanes (TPU) , Polyamides (PA), polyphenylene sulfides (PPS), polyaryletherketones (PAEK), polysulfones and polyimides (PI), more preferably from thermoplastic styrene-based elastomers (S-TPE), thermoplastic polyurethanes (TPU) and polyamides, and particularly preferably from thermoplastic polyurethanes (TPU).

The thermoplastic polyurethane (TPU) can be produced by any of the methods known to the person skilled in the art. In a preferred embodiment, the thermoplastic polyurethane (TPU) is produced by reacting components a) at least one isocyanate, b) at least one isocyanate-reactive compound, and c) optionally at least one chain extender with a number average molecular weight M _N in the range from 50 to 499 g / mol, if appropriate in the presence of d) at least one catalyst, e) at least one additive and / or f) at least one reinforcing agent.

The number average molecular weight M _N is determined in the context of the present invention by means of gel permeation chromatography.

The thermoplastic polyurethane (TPU) preferably has a weight average molecular weight M _w of at least 100,000 g / mol, more preferably of at least 400,000 g / mol and particularly preferably of at least 600,000 g / mol. In addition, the thermoplastic polyurethane (TPU) preferably has a weight-average molecular weight M _w of at most 800,000 g / mol. The weight average molecular weight M _w is determined in the context of the present invention by means of gel permeation chromatography.

In addition, the base body (G) can also contain at least one further component selected from the group consisting of reinforcing agents and additives.

The examples and preferences with regard to the insert (E) apply accordingly.

In the context of the present invention, the insert (E) is positioned in the overall cavity (HG) in such a way that the bottom (EU) of the surface (EF) of the insert (E) completely coincides with the top (FO) of the base (F) of the base body (G) is contacted.

The term “completely contacted” is understood in the context of the present invention that the underside (EU) of the surface (EF) of the insert (E) is preferably at least 90%, more preferably at least 95%, particularly preferably at least 98% and in particular 100% contact is made with the upper side (FO) of the base area (F) of the base body (G).

In addition, the term “contacted” in the context of the present invention means that the bottom (EU) of the surface (EF) of the insert (E) touches the top (FO) of the base (F) of the base body (G). The bottom (EU) of the surface (EF) of the insert (E) is preferably not irreversibly connected to the top (FO) of the base (F). However, it is also possible that the bottom (EU) of the surface (EF) of the insert (E) is also irreversibly connected to the top (FO) of the base (F), for example by gluing or thermal welding.

Furthermore, the insert (E) is positioned in the overall cavity (HG) in such a way that the underside (IU) of the inner flap (I) completely covers the upper side (EO) of the surface (EF) of the insert (E).

The term “completely covered” is understood in the context of the present invention that the upper side (EO) of the surface (EF) of the insert (E) is preferably at least 90%, more preferably at least 95%, particularly preferably at least 98% and in particular 100% of the underside (IU) of the inner flap (I) is covered.

The term "cover" is understood in the context of the present invention that the top (EO) of the surface (EF) of the insert (E) is below the bottom (IU) the inner tab (I) is hidden. The term “cover” does not mean, however, that the upper side (EO) of the surface (EF) of the insert (E) and the lower side (IU) of the inner flap (I) are irreversibly connected to one another.

However, it is also possible that the underside (IU) of the inner flap (I) is also irreversibly connected to the upper side (EO) of the surface (EF) of the insert (E), for example by gluing or thermal welding. In a preferred embodiment, the lower side (IU) of the inner flap (I) covers the upper side (EO) of the surface (EF) of the insert (E), but reversibly.

A high-heel shoe according to the invention is shown in FIGS. It comprises an insert (E) and a base body (G), the base body (G) including a base surface (F) and an inner tab (I). The insert (E) is positioned in the overall cavity (HG) in such a way that the bottom (EU) of the surface (EF) of the insert (E) is completely in contact with the top (FO) of the base (F) of the base body (G) and the lower side (IU) of the inner flap (I) completely covers the upper side (EO) of the surface (EF) of the insert (E). In addition, the high-heel shoe contains a shaft, a metal insert and a heel cap.

The base body (G) is manufactured as a single part using a 3D printing process.

In the context of the present invention, the expression “as an individual part” is understood to mean that the base body (G) is and is not produced as a single element comprising a base surface (F) and an inner tab (I) in a single 3D printing process by connecting individual elements, i.e. the base (F) and the inner link (I).

If the base body (G) comprises a shaft (S) in addition to the base surface (F) and the inner plate (I), the expression “as an individual part” in the context of the present invention means that the base body (G) is a single element , which comprises a base (F), an inner plate (I) and a shaft (S), is produced in a single 3D printing process and not by connecting individual elements, i.e. the base (F), the inner plate (I) and of the shaft (S).

However, it is also possible that, as described above (shaft (S1)), the shaft is manufactured separately, for example using a separate 3D printing process, and for example sewn onto the base body (G) after the manufacture thereof. In this case, the shaft is not understood as part of the base body (G).

3D (three-dimensional) printing processes as such are known to the person skilled in the art. According to the invention, in principle, all known different 3D Printing techniques such as selective laser melting, electron beam melting, selective laser sintering (SLS), the multi-jet fusion process (MJF), stereolithography or the fused deposition modeling (FDM) process can be used. The same applies analogously to the corresponding starting materials such as powder or filaments, which are applied layer by layer in the respective 3D printing process in order to produce the desired three-dimensional (3D) object.

In the context of the present invention, the 3D printing process is preferably a sintering process, more preferably a selective laser sintering process (SLS) or a multi-jet fusion process (MJF).

The provision of the base body (G) via a sintering process preferably comprises the following steps b-1) and b-2): b-1) Providing a layer of a sintered powder (SP) containing at least one second thermoplastic polymer (TP2), preferably At least one second thermoplastic polymer (TP2), selected from the group consisting of impact-modified vinyl aromatic copolymers, thermoplastic styrene-based elastomers (S-TPE), polyolefins (PO), aliphatic aromatic copolyesters, polycarbonates, thermoplastic polyurethanes (TPU), polyamides (PA) , Polyphenylene sulfides (PPS), polyaryl ether ketones (PAEK), polysulfones and polyimides (PI), more preferably from thermoplastic styrene-based elastomers (S-TPE), thermoplastic polyurethanes (TPU) and polyamides, and particularly preferably from thermoplastic polyurethanes (TPU), b -2) Sintering the layer of the sintering powder (SP) provided in step b-1).

Following step b-2), the layer of sinter powder (SP) is usually lowered by the layer thickness of the layer of sinter powder (SP) provided in step b-1) and a further layer of sinter powder (SP) is applied. This is then sintered again according to step b-2).

As a result, on the one hand the upper layer of the sinter powder (SP) connects to the lower layer of the sinter powder (SP), in addition, the particles of the sinter powder (SP) connect to one another within the upper layer by melting.

In the method according to the invention, steps b-1) and b-2) can thus be repeated. By repeating the lowering of the powder bed, the application of the sintered powder (SP) and the sintering and thus the melting of the sintered powder (SP), the base body (G) is produced. An additional support material is not necessary, since the unmelted sinter powder (SP) itself functions as a support material.

The particularly preferred 3D printing processes, the selective laser sintering process (SLS) or the multi-jet fusion process (MJF), are known to the person skilled in the art and, for example, in US Pat. No. 4,863,538 (SLS), US Pat. No. 5,658,412 (SLS), US Pat. No. 5,647,931 (SLS ) and WO 2015/108543 (MJF) in detail.

The sintered powder (SP) usually has particles. These particles have, for example, a size (D50 value) in the range from 10 to 190 μm, preferably in the range from 15 to 150 μm, more preferably in the range from 20 to 110 μm and particularly preferably in the range from 40 to 100 μm.

In the context of the present invention, the “D50 value” is understood to mean the particle size at which 50% by volume of the particles, based on the total volume of the particles, are less than or equal to the D50 value and 50% by volume of the particles are based on the total volume of the particles is greater than the D50 value.

The sintering powder (SP) usually has a melting temperature (T _{M (Sp)} ) in the range from 80 to 220.degree. The melting temperature (T _{M (Sp)} ) of the sintered powder (SP) is preferably in the range from 100 to 190.degree. C. and particularly preferably in the range from 120 to 170.degree.

The melting temperature (T _{M (Sp)} ) is determined in the context of the present invention by means of dynamic differential calorimetry (DDK; Differential Scanning Calorimetry, DSC). A heating run (H) and a cooling run (K) are usually measured, each with a heating rate or cooling rate of 20 K / min. A DSC diagram is thereby obtained. The melting temperature (T _{M (Sp)} ) is then understood to mean the temperature at which the melting peak of the heating run (H) of the DSC diagram has a maximum.

The present invention also relates to a method for producing a high-heel shoe comprising the following steps a) to c): has an underside (EU), a shoulder being formed on the underside (EU), b) providing a base body (G) which comprises a base area (F) and an inner tab (I), the base area (F) having an upper side (FO), one Underside (FU) and a first cavity (H1), and the inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap (I) so with the upper side (FO) the base (F) of the base body is connected that between the bottom (IU) of the inner tab (I), the top (FO) of the base (F) and the first cavity (H1) a second cavity (H2) is formed, which with the first cavity (H1) forms an overall cavity (HG), the overall cavity (HG) essentially corresponding to the shape of the insert (E), and c) positioning the insert (E) in the overall cavity (H) so that the The bottom (EU) of the surface (EF) of the insert (E) is completely in contact with the top (FO) of the base (F) of the base body (G) and the bottom (IU) of the inner flap (I) is in contact with the top (EO) of the The surface (EF) of the insert (E) is completely covered, with the base body (G) in step b) as an individual part via a 3D printing process is provided.

Another object of the present invention is the use of an inner flap (I) for completely covering the top (EO) of a surface (EF) of an insert (E) in a high-heel shoe, comprising the insert (E), which the surface (EF) comprises, which has an upper side (EO) and an underside (EU), a shoulder being formed on the underside (EU), and a base body (G), which has a base area (F) and the inner tab (I) comprises, wherein the base (F) has a top (FO), a bottom (FU) and a first cavity (H1), and the inner flap (I) has a top (IO) and a bottom (IU), the bottom (IU) of the inner tab (I) is connected to the top (FO) of the base (F) of the base body in such a way that between the bottom (IU) of the inner tab (I), the top (FO) of the base (F) and the first cavity (H1) a second cavity (H2) is formed, which forms a total cavity (HG) with the first cavity (H1) et, the total cavity (HG) essentially corresponding to the shape of the insert (E), the insert (E) being positioned in the total cavity (HG) in such a way that the underside (EU) of the surface (EF) of the insert (E ) is in full contact with the top (FO) of the base (F) of the base body (G), the base body (G) being produced as an individual part using a 3D printing process. The present invention is further illustrated by the following examples, without being limited thereto.

Inventive example B1:

A high-heel shoe was produced by positioning an insert (E) in the overall cavity (HG) of a base body (G), which comprises a base (F) and an inner flap (I), the base (F) having an upper side ( FO), an underside (FU) and a first cavity (H1), and the inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap (I) so with the Top (FO) of the base (F) of the base body is connected, that between the underside (IU) of the inner flap (I), the top (FO) of the base (F) and the first cavity (H1) a second cavity (H2) is formed, which forms a total cavity (HG) with the first cavity (H1), the total cavity (HG) essentially corresponding to the shape of the insert (E). The insert comprises a surface (EF) which has an upper side (EO) and an underside (EU), a shoulder being formed on the underside (EU). The insert was made from polyamide 11 (PA 11) in a selective laser sintering process. The base body (G) was produced from thermoplastic polyurethane in a multi-jet fusion process (MJF).

The insert (E) was positioned in the overall cavity (HG) in such a way that the bottom (EU) of the surface (EF) of the insert (E) is completely in contact with the top (FO) of the base (F) of the base body (G) and the lower side (IU) of the inner flap (I) completely covers the upper side (EO) of the surface (EF) of the insert (E).

In addition, the high-heel shoe has been reinforced with a metal insert and a heel cap. In addition, an outsole was glued on.

A test in accordance with PFI 00/1002 was carried out with the high-heel shoe produced. Even after 100,000 loads with a force of ± 120 N, no visual damage to the high-heel shoe produced, in particular to the heel (A), could be determined. This proves the high mechanical stability of the high-heel shoe according to the invention.

Examples according to the invention (B2a) and (B2b)

(B2a) A shaft (S1) is produced using a selective laser sintering process. A polyamide 6 (PA6; Ultrasint® PA6 from BASF SE) is used to manufacture the upper (S1). The outer thickness of the shaft (S1) is 0.7 mm, the The diameter of the printed structure inside is 0.8 mm. The shaft (S1) is shown in FIG.

(B2b) A shaft (S1) is produced using a selective laser sintering process. A polyamide 6 (PA6; Ultrasint® PA6 der

BASF SE) is used. The outer thickness of the shaft (S1) is 0.7 mm, the diameter of the printed structure on the inside is 0.8 mm. The shaft (S1) is shown in FIG.

Claims

Expectations

1. High-heel shoe comprising the following components: an insert (E) which comprises a surface (EF) which has an upper side (EO) and an underside (EU), with a heel (A ) is formed, and - a base body (G) which comprises a base surface (F) and an inner tab (I), the base surface (F) having an upper side (FO), a lower side (FU) and a first cavity (H1) and the inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap (I) so connected to the upper side (FO) of the base (F) of the base body (G) is that between the

Underside (IU) of the inner flap (I), the upper side (FO) of the base (F) and the first cavity (H1) a second cavity (H2) is formed, which forms a total cavity (HG) with the first cavity (H1) , the total cavity (HG) essentially corresponding to the shape of the insert (E), the insert (E) being positioned in the total cavity (HG) in such a way that the underside (EU) of the surface (EF) of the insert (E) is completely in contact with the top (FO) of the base (F) of the base body (G) and the bottom (IU) of the inner flap (I) the top (EO) of the surface (EF) of the

The insert (E) is completely covered and the base body (G) is manufactured as an individual part using a 3D printing process.

2. High-heel shoe according to claim 1, characterized in that the 3D printing process is a sintering process, preferably a selective one

Laser sintering process (SLS) or a multi-jet fusion process (MJF).

3. High heel shoe according to claim 1 or 2, characterized in that i) the insert (E) has at least a first thermoplastic

Polymer (TP1), preferably a polyamide (PA), contains and / or ii) the insert (E) is produced via a 3D printing process or via an injection molding process, preferably via an injection molding process.

4. High-heel shoe according to one of claims 1 to 3, characterized in that the underside (IU) of the inner flap (I) is also irreversibly connected to the upper side (EO) of the surface (EF) of the insert (E), preferably by gluing or by thermal welding.

5. High-heel shoe according to one of claims 1 to 4, characterized in that the base body (G) i) contains at least one second thermoplastic polymer (TP2), preferably the at least one second thermoplastic polymer (TP2) is selected from Group consisting of impact-modified vinyl aromatic copolymers, thermoplastic styrene-based elastomers (S-TPE), polyolefins (PO), aliphatic-aromatic copolyesters, polycarbonates, thermoplastic polyurethanes (TPU), polyamides (PA), polyphenylene sulfides (PPS), polyaryl ether ketones ( PAEK), polysulfones and poly imides (PI), more preferably made of thermoplastic styrene-based elastomers (S-TPE), thermoplastic polyurethanes (TPU) and polyamides, and particularly preferably made of thermoplastic polyurethanes (TPU), and / or ii) in addition to the base area (F) and the inner plate (I) comprises a shaft (S).

6. High-heel shoe according to one of claims 1 to 5, characterized in that the insert (E) and / or the base body (G) additionally contains at least one further component selected from the group consisting of reinforcing agents and additives .

7. High-heel shoe according to claim 1, characterized in that i) the high-heel shoe contains at least one further component selected from the group consisting of a heel cap, a metal insert, an outsole and an insole, and / or ii) the high-heel shoe, in addition to the insert (E) and the base body (G), comprises an upper (S1), the upper (S1) containing at least one third thermoplastic polymer (TP3), which is preferably to the at least one second thermoplastic polymer (TP2) is different, and wherein the base body (G) and the shaft (S1) are each produced via a 3D printing process.

8. High-heel shoe according to one of claims 1 to 7, characterized in that the at least second thermoplastic polymer (TP2) is different from the at least one first thermoplastic polymer (TP1).

9. A method for producing a high-heel shoe according to one of claims 1 to 8, comprising the following steps a) to c): a) providing an insert (E) which comprises a surface (EF) which has an upper side ( EO) and an underside (EU), a shoulder being formed on the underside (EU), b) providing a base body (G) which comprises a base area (F) and an inner tab (I), the base area (F ) has an upper side (FO), an underside (FU) and a first cavity (H1), and the inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap (I ) is so connected to the top (FO) of the base (F) of the base body that between the bottom (IU) of the inner tab (I), the top (FO) of the base (F) and the first cavity (H1) a second Cavity (H2) is formed, which forms a total cavity (HG) with the first cavity (H1), the total cavity (HG) essentially hen corresponds to the shape of the insert (E), and c) positioning the insert (E) in the overall cavity (HG) so that the bottom (EU) of the surface (EF) of the insert (E) completely aligns with the top (FO) the base area (F) of the base body (G) is in contact and the underside (IU) of the inner flap (I) completely covers the top side (EO) of the surface (EF) of the insert (E), the base body (G) in step b ) as a single part via a 3D

Printing process is provided.

10. The method according to claim 9, characterized in that the base body (G) is provided in step b) via a sintering process, preferably via a selective laser sintering process (SLS) or a multi-jet fusion process (MJF).

11. The method according to claim 10, characterized in that the provision of the base body (G) via a sintering process comprises the following steps b-1) and b-2): b-1) Providing a layer of a sintered powder (SP) which contains at least one second thermoplastic polymer (TP2), preferably at least one second thermoplastic polymer (TP2), selected from the group consisting of impact-modified vinyl aromatic copolymers, thermoplastic styrene-based elastomers (S- TPE), polyolefins (PO), aliphatic-aromatic copolyesters, polycarbonates, thermoplastic polyurethanes (TPU), polyamides (PA), polyphenylene sulfides (PPS), polyaryl ether ketones (PAEK), polysulfones and poly imides (PI), more preferably made of thermoplastic styrene-based elastomers (S-TPE), thermoplastic polyurethanes (TPU) and polyamides, and particularly preferably made of thermoplastic polyurethanes (TPU), b-2) sintering the layer of sintering powder (SP) provided in step i).

12. The method according to claim 11, characterized in that the

Sintering powder (SP) has particles with a size in the range from 10 to 190 μm.

13. The method according to any one of claims n or 12, characterized in that the sintering powder (SP) has a melting temperature (T _{M (Sp)} ) in the range from 80 to 220 ° C.

14. Use of an inner flap (I) to completely cover the upper side (EO) of a surface (EF) of an insert (E) in a high-heel shoe, comprising the insert (E) which comprises the surface (EF) has an upper side (EO) and a lower side (EU), a shoulder being formed on the lower side (EU), and a base body (G) which comprises a base area (F) and the inner tab (I), the base area ( F) has an upper side (FO), an underside (FU) and a first cavity (H1), and the inner flap (I) has an upper side (IO) and an underside (IU), the underside (IU) of the inner flap ( I) is so connected to the top (FO) of the base (F) of the base body that between the bottom (IU) of the inner flap (I), the top (FO) of the base (F) and the first cavity (H1) second cavity (H2) is formed, which forms a total cavity (HG) with the first cavity (H1), the total cavity (HG) essentially the F orm of the insert (E), the insert (E) being positioned in the overall cavity (HG) so that the underside (EU) of the surface (EF) of the insert (E) is completely in contact with the top (FO) of the base (F) of the base body (G), the base body (G) being produced as an individual part using a 3D printing process.

15. Upper (S1) containing at least one third thermoplastic polymer (TP3), preferably a polyamide, for use in a high-heel shoe, the upper (S1) being produced using a 3D printing process.