Lederartikel, insbesondere schuh und verfahren zu dessen herstellung

[0001] The invention concerns a leather article, in particular shoe with waterproof sewing of the polishing with a leather hurry, in particular with Sicherheitsschuhen, gloves, sport clothing od.

dgl.

A first, upper leather layer always is overlapping with a second, lower leather layer sewn. But in principle all leathers are suitably, thus e.g. Nubuk leather, all nubukartige exterior surface exhibiting leathers and practically also all other coated or not coated Leder.

The invention concerns in particular a shoe, as e.g. a Sicherheitsoder outdoor sport shoe, whose shoe upper section exists made of leather, which, examined according to DIN EN ISO 20345, takes up 20346 and 20347, less than 30 Gew % water and less than 0.2 g through water Iässt.

In all rule a shoe upper section consists of at least two parts, i.e. of the front part and the shoe back part, which are connected by at least a at least single-row seam. The water entrance by the holes, which by the Einbzw.

Durchstiche of the needles in the leather developed alone, are enormously highly, particularly with shoes, which when working within the wet range and/or in wet environment carried werden.

The thread with its Dochtwirkung favours the water transportation from the outside the inside the shoes still zusätzlich.

From the conditions of the technology various wet-strength is exhibiting shoes, e.g. on basis of textile material such as Goretex or Sympatex, bekannt.

These shoes exhibit a waterproof layer, whereby this layer is however not outside on the outer hull of the shoe applied, but as intermediate layer, like e.g. in form a fluorine polymer foil, thus within the shoe between its sturdy outer hull and the interior fodder of the shoe. It is thus with these well-known shoes like that water can penetrate in principle into the outer hull of the shoe and thus into its seams and at least up to the waterproof intermediate layer vordringt.

Is recommended by relevant companies, for a good stretcher comfort additionally to the semipermeable fluorine polymer foil to bring in between the shoe interior fodder and upper leather an adhesive film which sticks together with the interior seam of the leather wird.

The process of the production of such shoes is expensive and pedantic and the disposal that fluorine polymer containing foil no more zeitgemäß.

The outer hull of the shoe forming diaphragms it is breathe active which means that air and humidity can penetrate from the inside from the shoe outward, however then only if an appropriate humidity downward gradient exists outside world between shoe lnnenraum and. If the outer hull of the shoe is however damp, such a downward gradient is not sufficiently given not or, what the stretcher comfort of the shoes beeinträchtigt.

With modern leathers a hydrophobe external layer is located on that the wetness and/or the water accessible exterior of the leather articles, thus e.g. by shoes, so that humidity and in particular water the inside the outer hull cannot even penetrate, but of the external surface abperlt, whereby however the humidity from the inside outward escape kann.

Critical still the tie-in welds are between the polishing with a leather hurrying also with these leathers up to now in each case, since in these places water can penetrate the inside the shoe formed with the waterproof leather. The sewing threads and/or threads have a certain Dochtwirkung and to suck the water influencing from the outside quasi by the seam openings through inward and/or to the often rauen lower surface of the Leders.

From the conditions of the technology is well-known to apply on the inside of the seams a Polymerklepatentamt RK 11,184 U1 2010-06-15 more ber and/or to stick together thus the descriptive seams. As consequence of friction and/or movement it is added however again and again in the use the fact that in such a manner stuck together places and/or seams, if necessary actually only at few, “come up” more strongly strained places and kind of such becomes in the long run water leaky, which the stretcher comfort of the leather articles, in particular shoes drop, completely substantially Iässt.

The invention placed itself the task, on the inner surface of a covering e.g. a shoe, glove, a sport clothing article formed from a leather od. to such, in particular on the seam and on the overlap zone of two by a seam for bound polishing with a leather hurry a polymer mass to apply together, which sufficient sticking strength, softness and/or flexibility and extensibility possess if necessary, around described above, unpleasant coming up of the leather seam sealing over be enough and/or over entire Gebrauchsund/or stretcher duration of the leather articles effectively too verhindern.

Thes subject of the invention are thus a leather article, in particular a shoe, in accordance with which generic term of the requirement 1, which covers the characteristics specified in the characteristic part of this requirement, as well as further a procedure for the equipment of the leather articles with high value in use and stretcher comfort an exhibiting sewing the leather article forming individual polishing with a leather hurry with one another as well as a Kit.

suitable for it The requirement 3 the sizes of the polymer mass merged, expanded micro hollow balls or polymer particle guaranteeing preferred in the context of the invention in the solidified, the wet-strength within the seam range are too entnehmen.

The requirement 4 gives over prefers micro hollow balls and/or micro hollow cells which can be used the Auskunft.

The requirement 5 are favourable-proves densities of the solidified sewing seals polymer mass which can be kept too entnehmen.

The requirement 6 concerns after solidification on and of the way preferential into the seam range aufund brought in seam seals polymer mass MaximalShore-Härte.

which can be reached In the requirement 7 are the polymers used with advantage aufgezählt.

In the requirement 8 is the penetration of all sewing ranges favourable for the high wet-strength responsible person and - elements with the expandable polymer mass beschrieben.

Out of the requirement 9 the procedure for the production of the new leather articles, in particular shoes, and/or for the water resistant equipment, preferred in the context of the invention, goes from their seams hervor.

In the first process step the polymer adhesive on the inside is applied both on the seams themselves and beyond (cutting) the edge of lower and/or polishing with a leather ILS on the inside. The adhesive penetrates into the parting holes of the seams and distributes themselves also in all gaps, whereby a certain sealing effect obtains already from the beginning wird.

In the next process step a higher temperature is put on, whereby the micro hollow balls and/or the polymer particles in on the seam range applied the polymer mass and/or in the polymer adhesive expandieren.

Hiebei a closed cellular polymer foam with closed expanded micro hollow balls and/or cells with sizes forms preferentially within the range of 15 to 85 over. From the expansion a certain positive pressure results inside the seam parting holes and between the surfaces of the polishing with a leather hurry, whereby the polymer foam leather lnnenseite more deeply into the surface matrix penetrates and fully sealing the same covered. In such a way expanding polymer penetrates also directly into the sewing thread thus between its filaments and intersperses in this way the sewing thread completely, whereby the fatal Dochtwirkung patent office RK 11,184 U1 2010-06-15 of the thread described above is reduced practically to zero. Further the foam in the cells of the polishing with a leather hurry and the foam distribute themselves also into the gap between each other course-turned surfaces of the polishing with a leather hurry are pressed in and lead to the actually effective, high-responsible gluing the same miteinander.

by the positive pressure In addition thereby the polymer becomes particularly deep in all existing leather-interiorlateral pores, cavities, cracks and such of the leather hineingedrückt.

It is completely substantial that closed cellular hollow balls or - particle containing polymer adhesives to remain softly its and permanently soft must that it exhibits high Haftkraft and that it anyhow at least forwards and during the expansion of the micro hollow particles caused by heat effect thermoplastic its muss.

After expansion it does not have to be actually any longer thermoplastic, it must however in any case flexible and/or flexibly remain and may not also after long meter time of the leather article inflexibly werden.

As polymer adhesive an aqueous dispersion of the respective plastic output product with small is, the fluidity of the same limiting quantities of solvent (n) been suitable in particular PU, acrylates, vinyl acetate or various copolymers and mixtures the same, as well as PU with crystalline Struktur.

A polymer foam, which is particularly applicable, is for example in the DE 20105603 U1 descriptive. This polymer foam exhibits particularly exactly those characteristics, which are important for the purpose of the available invention, and has the closed cells in the form of micro hollow body, - balls or - cells with the certain Durchmesser.

already above mentioned It is the result of the procedure a product out sewn with one another leather elements, its seams and seams with one klebebzw. detentionable expanding polymer sealed sind.

Importantly it is here to apply not too much pressure there the micro hollow balls bzw.

Polymer particles otherwise not sufficiently expand könnten.

This is important, since the foam then also a certain height over that seam ranges reached and also the edge edges of each other overlapping pieces of leather are rounded off trained, whereby herein the advantage exists that unpleasant pressure points are avoided, what in particular with shoes completely substantially ist.

The requirement 10 are preferential additives in the output polymer dispersion and/or in the polymer coating and/or sealing in the long run interlaced too entnehmen.

The requirement 11 shows a possibility of a further improvement of the expansion of the micro hollow balls and/or expandable polymer particle auf.

It is particularly favourable in this sense, if as in accordance with requirement 12 planned according to creation and drying process of the expandable polymer adhesive easily dampened and according to it with heat treats the seams werden.

The hot water vapour penetrates extremely intensively in all pores and gaps and supports there the expansion and distribution of the micro hollow balls wirkungsvoll.

Finally the requirement 13 concerns a device and/or a kit for the execution of the Leder-Nahtversiegelung.

On the basis the design the invention is more near described:

The Fig shows. 1 the cutaway view of a waterproof, double-row sewing of two polishing with a leather hurry in accordance with the invention with for instance 10-10-facher enlargement and the Fig. 2 in a substantially higher enlargement with a multiplicity of filaments the formed, and water resistantly equipped thread according to invention sealed of a sewing of two polishing with a leather hurry likewise in Schnittansicht.

patent office RK 11,184 U1 2010-06-15 in accordance with the Fig. 1 are upper first polish with a leather-hurry 1 and lower second polish with a leather-hurry over an overlap zone 11 with one another by means of thread 3 laminar with one another verbunden.

By their lower surfaces 2 and/or by the inside I are subjected ago the entire overlap zone 11 and the same to reciprocally accompanying edge zones 110, 110 ', high-responsible polymer mass 6 containing with the solidified and expanded micro hollow balls and/or polymer particles. This mass 6 sticks on the one hand to the interiorlateral i overlap zone 11 and their edge zone 110, and goes einstückig over the edge edge 20 of lower second polishing with a leather ILS 10 all detention-covering integral into this coating of the edge zone 110 über.

Due to the suction effect of the single filaments 300 and between the same micro gaps 301 it comes to high eyes of the laid on micro hollow balls containing polymer dispersion into the thread 3, and to of them haftfest with the side walls 31 the polishing with a leather hurry 1 and 10 interspersing seam parting holes 20 and to the intensive stick lmprägnierung the individual yarn filaments 300 and the fine gaps 301 between the same, so that after solidification of the polymer mass 6 in consequence of the closed cellular micro hollow balls absolutely none can take place water-depressed through the seam 30 and the seam range 11. Substantially still it contributes hiezu that the expanded polymer penetrated 6 naturally also into the overlap gap 4 between the polishing with a leather hurrying 1 and 10, so that also in this sensitive zone water-depresses impossible ist.

From the Fig. 1 is finally still evidently like the Übergangszone 110 between lower second and upper first polish with a leather-hurries 10 and 1 in particular at the lip of lower polishing with a leather ILS 10 rounded off trained is, around unpleasant pressure points, e.g. in a shoe too vermeiden.

During otherwise continuous reference symbol meanings the Fig shows. 2 the parting opening 20 in one the polishing with a leather hurry 1 or 2 completely close: It is from these Fig. evidently, like the gaps 301 between the same, exhibiting in the polymer mass 6 embedded, expanded closed micro hollow balls 60 itself expanding between the individual filaments 300 of the thread 3 urge and in this way those actually a suction effect, fully sealing verschließen.

It is appropriate, if the interior of the parting recesses in second polish with a leather-hurry completely and/or the interior of the parting recesses in first do not polish with a leather-hurry or at least partly filled with polymer coating sind.

Favourably the pass recesses are 25 in the second leather 10 completely and the pass recesses 25 in the first leather, i.e. within the range of the gap 4, partly or not gefüllt.

The assigned polymer coating 6 should be applied along the lip surface 20, in particular in column 4, continuous, noly-break. Same is valid for range inner surface 2 second leather 10, which should be covered over the range, within which pass recesses are present 25, full-laminar with polymer coating 6.