EP2762575A1 - Procédé de fabrication destiné à fabriquer un cuir refendu fin à partir d'une peau d'animal - Google Patents

Procédé de fabrication destiné à fabriquer un cuir refendu fin à partir d'une peau d'animal Download PDF

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Publication number
EP2762575A1
EP2762575A1 EP13153581.7A EP13153581A EP2762575A1 EP 2762575 A1 EP2762575 A1 EP 2762575A1 EP 13153581 A EP13153581 A EP 13153581A EP 2762575 A1 EP2762575 A1 EP 2762575A1
Authority
EP
European Patent Office
Prior art keywords
layer
animal skin
gap
split
grain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13153581.7A
Other languages
German (de)
English (en)
Other versions
EP2762575B1 (fr
Inventor
Andreas Kindermann
Manuel ZOTTLER
Gregor ACKERMANN
Gottfried Tandl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wollsdorf Leder Schmidt and Co GmbH
Original Assignee
Wollsdorf Leder Schmidt and Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wollsdorf Leder Schmidt and Co GmbH filed Critical Wollsdorf Leder Schmidt and Co GmbH
Priority to ES13153581T priority Critical patent/ES2740728T3/es
Priority to EP13153581.7A priority patent/EP2762575B1/fr
Priority to PL13153581T priority patent/PL2762575T3/pl
Priority to PT13153581T priority patent/PT2762575T/pt
Priority to PCT/EP2014/051169 priority patent/WO2014118037A1/fr
Publication of EP2762575A1 publication Critical patent/EP2762575A1/fr
Application granted granted Critical
Publication of EP2762575B1 publication Critical patent/EP2762575B1/fr
Active legal-status Critical Current
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B7/00—Special leathers and their manufacture
    • C14B7/02—Composite leathers
    • C14B7/04—Composite leathers by cementing or pressing together leather pieces, strips or layers, Reinforcing or stiffening leather by means of reinforcing layers

Definitions

  • the document DE 203 17 423 U1 discloses a process for the production of leather with a textile reinforcing layer to give the finished leather, when used in spite of its small thickness, the required tensile and tear strength and puncture resistance.
  • an adhesive layer is applied either to a separated from the animal skin meat gap or grain gap, in which the textile reinforcing layer is introduced and in which it is fixed by a pressure and heat treatment. Subsequently, the dressing is made on the textile reinforcement layer.
  • Bovine skins for example, are 5 to 10 millimeters thick, so that several layers can be obtained by splitting the skins.
  • the bottom layer of the animal skin, the flesh side is inferior, since the density and entanglement of the protein fibers, which make up leather, decreases down to the meat side, which is why the meat side also has the least internal cohesion.
  • the highest mechanical strength has the so-called grain gap, which is the top layer containing the smooth leather top, the grain side.
  • the invention has for its object a method for producing thin grain gap and / or meat gap to obtain, in which the above disadvantages are avoided. According to the invention this task is solved in that before splitting the animal skin on the grain side and / or on the meat side of a Strengthening layer is applied, which gives the animal skin during splitting additional mechanical strength.
  • the reinforcing layer before the splitting process By applying the reinforcing layer before the splitting process, the advantage is obtained that much thinner layers can be split off from the animal skin. This is particularly advantageous on the meat side and especially in a middle gap, as they could be split only relatively thick by the low inner cohesion in previous cleavage process.
  • a textile / nonwoven layer introduced into an adhesive layer and in particular a layer of binder have proven to be advantageous.
  • the reinforcing layer can be removed after splitting off the split leather.
  • the finished leather obtains additional mechanical strength and a more uniform surface through the reinforcing layer not only in the splitting but also in its use as a finished leather product.
  • FIG. 1 Figure 1 shows an animal skin 1 subdivided into an epidermal papillary layer, a reticular layer known as dermis and subcutaneous connective tissue. From such an animal skin 1, individual layers are split off in a process for the production of leather, wherein one distinguishes a scar side 2 and a meat side 3 of the animal skin 1.
  • the uppermost split-off layer, the so-called grain gap 4 has the Papillar für, which is qualitatively the highest quality due to their high mechanical strength.
  • the so-called middle gap 5 and below the meat gap 6 have only a lower density and entanglement of the protein fibers, which is why they have only a relatively low mechanical strength.
  • the meat gap 6 and optionally one or more central gaps 5 the split-off layers are tanned and further processed to finished leather.
  • FIG. 2 shows the animal skin 1 according to FIG. 1 schematized, wherein on the grain side 2 and on the meat side 3 each have a reinforcing layer 7 was applied.
  • the reinforcing layer 7 is formed by a binder and / or by a textile / nonwoven layer.
  • the binder was applied to the animal skin 1 by spraying, pouring or rinsing.
  • the binder can be formed for example by a mixture of polymers (acrylates, polyurethanes) with the use of fillers (eg microcapsules) and auxiliaries (waxes, silicones).
  • the binder penetrates into the depressions of the animal skin 1 and forms after curing the reinforcing layer 7, which gives the animal skin 1 on both the scar side 2 and on the meat side 3 additional mechanical strength.
  • the meat gap 6 is split off from the grain gap 4 of the animal skin 1 along a split line 8.
  • the thickness of the meat gap 6 can be selected to be particularly thin, since the reinforcing layer 7 gives the meat gap 6 sufficient mechanical strength that it does not crack when it is split off. This particularly thin meat gap 6 is very light and yet resistant, which is why the split leather produced therefrom for a variety of applications is usable.
  • FIG. 3 shows that of the animal skin 1 according to FIG. 2 split column gap 4.
  • a further solidification layer 7 is applied to the meat side 3.
  • the further hardening layer 7 may again be formed by a binder or else by a textile / nonwoven layer, which will be discussed in more detail below.
  • a first middle gap 5 can be split off from the animal skin 1. Since the animal skin 1 in this layer a special Having lower density and entanglement of protein fibers, it is only possible by the application of the solidification layer 7 to split off a thin central gap 5 from the animal skin 1.
  • the thickness of the layers cleavable by the method according to the invention also depends on the cleavage machine used for cleavage, but by providing the solidification layer 7, for example, grain gaps 4 having the thickness of only 0.5-0.7 mm, center gaps 5 having the thickness of only 0.7-0.9 mm and meat gap 6 with a thickness of only 0.7-0.9 mm can be achieved. These are advantageously particularly light and yet mechanically strong.
  • middle gaps 5 can subsequently be split off.
  • the solidification layer 7 on the grain side 2 enables a particularly thin grain nip 4 to be split off from the last split-off middle gap 5.
  • a textile layer in particular the following types of fibers have proved to be advantageous: woven fabric, knitted fabric, felt made of synthetic fiber, in particular polyamide or polyester, natural fiber, especially cotton or wool, carbon fiber material, in particular aramid fiber.
  • the textile layer fulfills several functions in the finished leather. For the time being, the textile layer has the function to compensate for excessively large depressions or elevations, which occur in particular on the grain side 2.
  • the thickness of the textile layer or the weight per unit area of the textile layer is chosen to be thicker or heavier, the thinner the layer to be split off and / or the greater the skin damage. Due to this balancing function of the textile layer, its surface is much calmer or smoother than the surface of the epidermis.
  • dressing can be sprayed or rolled up after tanning, which then remains as a thin film.
  • the ingredients include pigments, acrylates, binders mainly from polyurethanes, waxes and silicones.
  • the inventive application of the solidification layer 3 before splitting the animal skin 1 thus has the advantage that particularly thin layers can be split off, and the additional advantage that the solidification layer 3, the surface of the finished leather improved.
  • the solidification layer 7 could be applied. This could be advantageous, for example, if the grain gap 4 is not intended to be split off particularly thinly and it is only necessary to split off as many center gaps 5 or as thin a meat gap 6 as possible in the case of an animal skin 1. On the other hand, for a particular use, a particularly thin grain gap 4 may be required, for example, the remaining animal skin 1 should be split off only in a single meat gap 6 without middle gap 5. This depends on the intended use of the finished leather.
  • the textile layer can be made thicker with, for example, a basis weight of 20 g / m 2 if the surface of the leather 1 is to have an embossing.
  • the textile layer could also be flame-retardant or electrically conductive for seat heating.
  • the textile layer can avoid static charges, for example in the area of electronics (consumer electronics, electrical appliances).
  • an electrostatic charge conductive layer in the textile / nonwoven layer could be incorporated an electrostatic charge conductive layer, which could optionally be grounded via a contact, but need not.
  • Such leather could also be used for trim parts of electronics (e.g., cell phone covers), thus fulfilling an antistatic function. This improves the indoor climate and protects the devices against unintentional discharging.
  • nonwoven is understood by the person skilled in the art to mean a textile fabric of individual fibers. In contrast, woven, knitted and knitted fabrics are made from yarns.
  • the textile / nonwoven layer can thus consist of either a textile or a fleece or a combination of the two types. It may be mentioned that the textile / nonwoven layer can be fixed not only by gluing or fixing by a layer of dressing. The person skilled in further known methods for fixing two layers together. For example, the textile / nonwoven layer could be fixed by a raster method.
  • an adhesive any other commercially available adhesive that is not thermally activated, can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Laminated Bodies (AREA)
EP13153581.7A 2013-02-01 2013-02-01 Procédé de fabrication destiné à fabriquer un cuir refendu fin à partir d'une peau d'animal Active EP2762575B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES13153581T ES2740728T3 (es) 2013-02-01 2013-02-01 Procedimiento de fabricación para la fabricación de un cuero dividido fino a partir de una piel animal
EP13153581.7A EP2762575B1 (fr) 2013-02-01 2013-02-01 Procédé de fabrication destiné à fabriquer un cuir refendu fin à partir d'une peau d'animal
PL13153581T PL2762575T3 (pl) 2013-02-01 2013-02-01 Sposób wytwarzania cienkiej skóry dwojonej ze skóry zwierzęcej
PT13153581T PT2762575T (pt) 2013-02-01 2013-02-01 Método de fabrico de um couro fino cortado a partir de peles de animais
PCT/EP2014/051169 WO2014118037A1 (fr) 2013-02-01 2014-01-22 Procédé de production d'un fin cuir refendu à partir d'une peau d'animal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13153581.7A EP2762575B1 (fr) 2013-02-01 2013-02-01 Procédé de fabrication destiné à fabriquer un cuir refendu fin à partir d'une peau d'animal

Publications (2)

Publication Number Publication Date
EP2762575A1 true EP2762575A1 (fr) 2014-08-06
EP2762575B1 EP2762575B1 (fr) 2019-05-22

Family

ID=47709916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13153581.7A Active EP2762575B1 (fr) 2013-02-01 2013-02-01 Procédé de fabrication destiné à fabriquer un cuir refendu fin à partir d'une peau d'animal

Country Status (5)

Country Link
EP (1) EP2762575B1 (fr)
ES (1) ES2740728T3 (fr)
PL (1) PL2762575T3 (fr)
PT (1) PT2762575T (fr)
WO (1) WO2014118037A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111996306A (zh) * 2020-09-11 2020-11-27 重庆隆发皮革制品有限责任公司 一种高稳固性的牛皮席生产工艺
EP4060463A1 (fr) * 2021-03-16 2022-09-21 Mercurius SLG Ltd. Produit de cuir fonctionnel et son procédé de fabrication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT523247B1 (de) * 2019-11-25 2022-04-15 Wollsdorf Int Gmbh Vorrichtung zum Strecken von Tierhaut

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1660078A1 (de) * 1966-11-05 1971-04-22 Heinrichs Karl Heinz Verfahren zur Herstellung von Verbundplatten aus Leder und einer hiermit verbundenen Deckschicht
FR2727430A1 (fr) * 1994-11-30 1996-05-31 Guenoun Henri Stratifie constitue d'une mince couche de croute de cuir obtenue par sciage de croute d'epaisseur traditionnelle prealablement finie et/ou teinte sur ses deux faces, liee a un produit en renfort
DE20317423U1 (de) 2003-11-12 2004-02-19 Schaefer, Philipp Mit einer Zurichtung versehenes Leder
DE102010042103A1 (de) * 2010-10-07 2012-04-12 Bader Gmbh & Co. Kg Verfahren zur Herstellung von Lederteilen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE90395T1 (de) * 1989-12-13 1993-06-15 Lindgens Ludwig Kg Verfahren zum herstellen eines spaltleders und verwendung desselben.
GB9108870D0 (en) * 1991-04-25 1991-06-12 Feeney John Improvements relating to the lamination of polyvinyl-chloride and,or viscose rayon materials to leather
DE9302479U1 (de) * 1993-02-20 1993-04-15 Norddeutsches Lederwerk GmbH, 19306 Neustadt-Glewe Lederverbundwerkstoff
AT7055U1 (de) * 2003-06-23 2004-09-27 Schaefer Philipp Leder
KR100853546B1 (ko) * 2007-05-31 2008-08-21 (주)남청 자동차 시트용 스플릿 가죽원단 및 그 제조방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1660078A1 (de) * 1966-11-05 1971-04-22 Heinrichs Karl Heinz Verfahren zur Herstellung von Verbundplatten aus Leder und einer hiermit verbundenen Deckschicht
FR2727430A1 (fr) * 1994-11-30 1996-05-31 Guenoun Henri Stratifie constitue d'une mince couche de croute de cuir obtenue par sciage de croute d'epaisseur traditionnelle prealablement finie et/ou teinte sur ses deux faces, liee a un produit en renfort
DE20317423U1 (de) 2003-11-12 2004-02-19 Schaefer, Philipp Mit einer Zurichtung versehenes Leder
DE102010042103A1 (de) * 2010-10-07 2012-04-12 Bader Gmbh & Co. Kg Verfahren zur Herstellung von Lederteilen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111996306A (zh) * 2020-09-11 2020-11-27 重庆隆发皮革制品有限责任公司 一种高稳固性的牛皮席生产工艺
EP4060463A1 (fr) * 2021-03-16 2022-09-21 Mercurius SLG Ltd. Produit de cuir fonctionnel et son procédé de fabrication

Also Published As

Publication number Publication date
PL2762575T3 (pl) 2019-10-31
EP2762575B1 (fr) 2019-05-22
WO2014118037A1 (fr) 2014-08-07
ES2740728T3 (es) 2020-02-06
PT2762575T (pt) 2019-09-05

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