EP0296542A2 - Matériau en cuir ainsi que procédé et appareillage pour le fabriquer - Google Patents

Matériau en cuir ainsi que procédé et appareillage pour le fabriquer Download PDF

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Publication number
EP0296542A2
EP0296542A2 EP88109879A EP88109879A EP0296542A2 EP 0296542 A2 EP0296542 A2 EP 0296542A2 EP 88109879 A EP88109879 A EP 88109879A EP 88109879 A EP88109879 A EP 88109879A EP 0296542 A2 EP0296542 A2 EP 0296542A2
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EP
European Patent Office
Prior art keywords
leather
layer
cover layer
base
compensating
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.)
Withdrawn
Application number
EP88109879A
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German (de)
English (en)
Other versions
EP0296542A3 (fr
Inventor
Helmuth Schmoock
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0296542A2 publication Critical patent/EP0296542A2/fr
Publication of EP0296542A3 publication Critical patent/EP0296542A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C11/00—Surface finishing of leather

Definitions

  • the invention relates to a leather which has a coating covering a base leather in the area of at least one of its surfaces.
  • the invention also relates to a method for producing a leather which has a coating covering a base leather in the area of at least one of its surfaces.
  • the invention further relates to a device for producing a leather which has a coating covering a base leather in the area of at least one of its surfaces.
  • the undesired grain and any existing Scar disorders mean that the material waste when dressing the leather generally exceeds the material waste during tanning.
  • the object of the present invention is therefore to improve a leather of the type mentioned at the outset in such a way that it has a predeterminable characterization in the region of a visible surface and its natural properties are largely retained.
  • the coating is designed as an unevenness in the area of a cover layer which is arranged facing the base leather surface and which, at least in the area of its cover layer surface facing away from the base leather surface, has a design which can be predetermined to characterize the leather.
  • the cover layer gives the leather an optical design that is independent of the physical properties of the base leather, at least in the area of a cover layer surface facing away from the base leather.
  • the cover layer fills scarring disorders and undesired scars in the area of this surface and can be designed as desired in the area of its cover layer surface facing away from the base leather surface.
  • the cover layer is formed from at least two partial cover layers, the first of which is designed as a compensation layer and is arranged in the region of the base leather surface.
  • the compensating layer has an essentially planar configuration in the region of its compensating layer surface which faces away from the base leather surface.
  • a cover layer is arranged, which is designed, for example, as a lacquer layer.
  • the formation of the cover layer from two partial cover layers makes it possible to combine different material properties for the desired design of the leather surface.
  • a material can be used for the leveling layer, which in particular has good leveling properties and adhesive properties.
  • a material can be used for the cover layer, which, for example, has, in particular, scratch-resistant and moisture-resistant properties and, in particular, gives the user the impression of a good grip.
  • Another object of the present invention is therefore to improve a method for producing a leather so that it has a definable characterization of a high quality leather, at least in the area of a visible surface, its natural properties are at least preserved and existing defects are eliminated.
  • the leather is coated with a cover layer which can be predetermined and at least leveled in the area of a cover layer surface facing away and leveling unevenness in the area of a base leather surface which is arranged away from the cover layer surface.
  • the base leather surface By coating the base leather surface with the cover layer, an undesirable optical design that may be present in the area of the base leather surface is no longer perceptible to a viewer of the leather. Instead, the viewer looks at the cover layer surface, which can be designed to any extent and which is designed depending on the intended field of application of the leather.
  • the coating largely preserves the natural properties of the leather and adds to it the other positive properties required for the respective application, such as water resistance, lubricity, color design and resistance to solvents.
  • the cover layer is at least partially transferred from a support to the leather surface in the transfer process.
  • the transfer of the cover layer in the transfer process makes it possible to produce the cover layer at a first plant and to apply it to the leather with simple means at another plant.
  • the use of the trans process allows leather processing with very simple and therefore also inexpensive and failure-prone machines that are available in almost all tanneries.
  • This very simple equipment design of the The process is particularly important in the underdeveloped areas, since generally there is no well-trained operating staff and any necessary repairs to special machines can only be carried out by foreign specialists. Continuous operation is always at risk when using special machines of this type.
  • Another object of the present invention is therefore to use simple means to produce a leather which has a predeterminable characterization in the region of a visible surface while largely maintaining its natural properties.
  • a top coat connecting the leather has at least one press, the pressure surface of which is movably mounted in the direction of a heated abutment, a cover layer substrate to be transferred to the base leather is arranged between the base leather and the base surface is.
  • Such a device makes it possible to provide the base leather surface with a uniform surface over the entire area of its expansion and to largely avoid material losses.
  • the heated abutment heats the cover layer substrate briefly and with sufficient energy to soften the cover layer, without the heat penetrating into the base leather. In this way, a good connection between the cover layer substrate and the base leather is ensured without the base leather therefore being disturbed in its structure, for example hard.
  • the cover layer substrate is applied to a carrier which is guided from an unwinding roller via the coater to a winding roller.
  • the arrangement of a heater in the area of the abutment enables the leather to be coated with a thermoplastic material, in a manner that compares the surface that is created, with relatively low and therefore inexpensive pressures.
  • the heating of the cover layer material ensures good penetration into unevenness arranged in the area of the base leather surface and a good connection of the cover layer to the base leather surface.
  • the use of a carrier also enables extensive preparation of the covering layer to be applied outside the press and the coating can be carried out in one operation using simple tools.
  • the cover layer substrate applied to the carrier can be unwound from a roll with the carrier and continuously transferred to the base leather.
  • a cover layer (1) for coating a base leather (2) essentially consists of a compensating layer (3) which fills out unevenness (5) arranged in the area of a base leather surface (4) delimiting the base leather (2), and a cover layer (6), which is connected to the compensating layer (3) in the region of a compensating layer surface (7) which faces away from the base leather surface (4).
  • the leveling layer (3) is directly connected to the base leather (2). It is applied in the form of a compensation substrate (9) to the base leather surface (4), which can be designed as a compensation powder. It is also possible to spray on the compensation substrate (9) or to apply it in the form of a solution.
  • the compensation substrate (9) is designed as a thermoplastic, for example as a hot melt, which has thermally activatable adhesive properties.
  • the compensating substrate (9) can be applied in the form of a dispersion, the aqueous portion of which is evaporated after the application, but before the pressing.
  • the cover layer (6) is designed as a uniform layer det; However, it is also possible to form the covering layer (6) from partial covering layers (11, 13) arranged one above the other.
  • a color layer (14) is provided as the cover layer (13) and is designed, for example, as a polyurethane varnish. However, it is also possible to form the partial covering layer (13) from acrylate, polyamide or aceto-butyrate.
  • the base leather (2) is designed as split leather, but it is also possible to use other types of leather. In particular, it is possible to provide leather from pigs, cattle, goats, sheep or other animals with usable skins with the cover layer (1). Types of leather with severely damaged scars are used.
  • the cover layer (6) and the compensation layer (3) are applied directly to the base leather surface (4); However, it is also possible to arrange at least the covering layer (6) in the region of a carrier (15) and to transfer it from the carrier (15) to the base leather surface (4) covered with the compensating layer (3).
  • the cover layer (6) is applied by the carrier (15) to the compensation layer (3) connected to the base leather (2); However, it is also possible to arrange both the covering layer (6) and the compensating layer (3) on the carrier (15) and to apply them together to the base leather surface (16).
  • the cover layer (6) is arranged directly on a carrier surface (16) facing the base leather (2). However, it is also possible to arrange a separating layer (17) which enables the covering layer (6) to be easily detached from the carrier (15) between the carrier surface (16) and the covering layer (6).
  • the separating layer (17) can be designed as a separating lacquer.
  • the carrier (15) is designed as a plastic film, for example polyester, polyvinyl chloride or polyethylene. However, it is also possible to form the carrier (15) from paper or metal, for example aluminum. Finally, the carrier (15) can also consist of a combination of a plastic and a metal.
  • the cover layer (6) is colored, but it is also possible to make the cover layer (6) colorless, transparent or pigmented. In addition, it is possible to give the cover layer (6) a design that improves the grip of the leather.
  • the carrier (15) is essentially flat in the region of its carrier surface (16); it is also possible, however, to provide the carrier (15) with an embossing which is modeled on the surface structure of a leather to be represented.
  • a structured paper can be used for this purpose, which is provided with a separating layer, for example a silicone layer.
  • a device for coating a base leather (2) with a cover layer (1) essentially consists of a coater (18) which has a pressure surface (23) which is movable in the direction of an abutment (21).
  • the abutment (21) has, in the area of its extension facing the base leather (2), a contact surface (43) which acts on the base leather (2) with a cover layer substrate (2o).
  • the coater (18) is designed as a press (22) which has a pressure surface (23) which can be adjusted essentially perpendicular to the base leather (2). In the area of the abutment (21) there is a heating (24) heating it.
  • cover layer (6) and then the compensation layer (3) are applied to the carrier (15).
  • the carrier (15) is guided into the area of the base leather (2), where the base leather (2) is pressed by the press (22) against the carrier (15) resting on the abutment (21) and thereby the compensation layer (3 ) and cover layer (6) is connected to the base leather (2).
  • the Abutment (21) of the press (18) is heated and connects the compensation layer (3) with the base leather surface (4).
  • the abutment (21) is heated to a temperature in the range of 12o to 14o degrees C depending on the pressure time. However, it is also possible to provide other temperatures adapted to the compensation layer material.
  • the pressure has a value in the interval from 2o to 5o Kp / cm2. However, it is also possible, depending on the base leather (2) and the compensating layer material, to provide other pressing pressures.
  • the pressing takes 3 to 8 seconds. Depending on the materials used, other pressing times can also be provided.
  • the compensation layer (3) can be applied, for example, in powder or film form.
  • a polyurethane can be selected as the compensation layer (3).
  • the polyurethane can also be applied from a hot melt and cure in the air with or without the influence of atmospheric moisture.
  • the properties of the leather present on the one hand and the desired presentation of the end product on the other must be taken into account.
  • an amount of 20 to 25 gr / cm 2 is expediently selected.
  • an amount of 25 to 40 gr / cm 2 is expediently applied.
  • an amount of 25 to 40 gr / cm2 is also expediently applied.
  • a normal split leather with severe damage needs an amount of 4o to 5o gr / cm2 in order to be able to produce a flat surface.
  • this compensation layer (3) In order to connect this compensation layer (3) firmly to the base leather (2), pressure and temperature act on the compensation substrate (9). This will be convenient a temperature of 130 ° C. is selected, with which the compensation layer (3) to be pressed with the base leather (2) is acted on for 3 seconds. It is also possible to select a temperature of 125 degrees C, which is used to act on the base leather (2) for 4 to 5 seconds. Finally, it is conceivable to act on the compensation layer (3) for 8 seconds at a temperature of 120 ° C. A pressure which is at least 20 Kp / cm 2 is expediently used.
  • the carrier (15) is expediently first provided with a separating layer on its surface facing the base leather (2) during pressing for example made of silicone.
  • a release varnish is preferably used, which improves the wearing properties and the grip.
  • the cover layer (6) is then applied to this silicone layer.
  • printing for example gravure printing, can be provided between the separating layer (17) and the covering layer (6). This can be provided in one or more colors.
  • different application methods can be used to apply the covering layer (6); for example, the covering layer (6) can be rolled on or painted on. Other types of orders can also be used.
  • the compensation layer (3) is then applied to the cover layer (6).
  • Various coating methods can also be used here, for example spreading, rolling or extruding. If, for example, the compensating layer (3) is applied to the cover layer (6) from a dispersion, for example by evaporating the aqueous portion, the dispersion is expediently brushed on.
  • the substrate forming the compensation layer (3) can be moved onto the cover layer (6) with the aid of a heated slot die.
  • a pressure surface can be used to press the coated carrier (15) with the base leather (2) and transfer the pressure to the carrier (15), which is designed according to the desired surface structure of the end product.
  • a pressure surface (23) of a table press (22) can have a smooth surface if the end product is to have a smooth surface.
  • Such a smooth surface can be used, for example, to produce a patent leather. If, however, the end product is to have a grained surface, a scarred scar plate (4o) will be used in the table press (22), with the aid of which the graining provided on the scar plate (4o) is transferred to the compensating layer (2).
  • the carrier (15) can be pressed, if the compensation layer (3) is connected to the base leather (2).
  • the grain can also be produced with a correspondingly shaped carrier (15), for example a carrier paper provided with a grain, the surface of which facing the cover layer (6) is siliconized.
  • the carrier (15) can have a smooth or matt surface, depending on whether a smooth or matt leather is to be produced.
  • the temperature of the abutment (21) activates an adhesive property of a compensating layer (3) already on the base leather (2) and this with the base leather ( 2) connected.
  • the compensation layer (3) initially becomes pasty and blurs at a pressure of 4o to 8o Kp / cm2.
  • the compensation layer (3) which has become pasty, penetrates into the base leather surface (4) and equalizes the grain of the base leather (2).
  • the pasty compensation layer (3) compensates for defective areas located within the base leather surface (4).
  • the leveling layer surface (7) or the top layer surface (33) is also designed with the aid of a scar plate (4o) applying pressure to the top layer (1).
  • the carrier surface (16) can also have a shape which shapes the cover layer surface (33).
  • the unevenness (5) located on the base leather surface (4) is filled on the basis of the mass of the compensation layer (3), which fills the unevenness (5) and also enables the compensation layer surface (7) to be designed.
  • the mass of the leveling layer (3) should be chosen so that a desired top layer surface (33) can be created in any case, regardless of the size of the unevenness (5).
  • the carrier (15) is pulled off a cover layer (6) and is the surface of the cover layer (6) which is arranged away from the compensation layer (3) visible. It is also possible to connect the compensation layer (3) to the cover layer (6) without using a carrier (15) and to apply it as a combination product to the base leather (2).
  • a calender (34) provided with a heater (24) is arranged opposite a pressure roller (36). Between the pressure roller (36) and the calender (34) there is a slot (31), the height of which corresponds to the thickness of a base leather (2).
  • the carrier (15) provided with the cover layer (1) extends through the slot (31) and the base leather (2) to be coated is placed on its cover layer surface (33). With the help of the carrier (15) transported in the transport direction (32), the base leather transported on the carrier (15) is also pulled into the slot (31) between the calender (34) and the pressure roller (36).
  • the speed of both the calender (34) and the pressure roller (36) is determined so that the base leather (2) remains within the slot (31) until the compensation layer (3) due to the heating by the heater (24) has become soft that it can form a connection with the base leather surface (4).
  • the pressure roller (36) is provided on its circumference with a calender coating (35) which prevents the base leather (2) from sticking when the base leather (2) passes the slot (31).
  • the base leather (2) After the base leather (2) has passed through the slot (31), the base leather (2) is covered with a cover layer (1) on its underside facing the calender (34). The finished base leather (2) can now be removed from the carrier (15) and placed in a bearing (3o).
  • a pigskin is sanded on one side with 170 grit sandpaper. Then a black pigmented plastic varnish is applied to a paper surface applied, which is to be transferred as a cover layer to the pigskin. Then a hot activatable surface-compensating adhesive with a thickness of 30 gr / m2 is applied to the cover layer.
  • This adhesive is a polyamide, for example Eurolan from Schering.
  • the paper coated in this way is placed with the adhesive layer on the sanded surface of the pigskin and at a pressure of 40 Kp / m2 and a temperature of 130 degrees C for 3 seconds. pressed. The paper can then be removed from the cover layer as a carrier material.
  • a release varnish is applied to a plastic film serving as a carrier material - e.g. polyester film. C.A.B. by Eastman.
  • An aliphatic polyurethane from Bayer which can also be pigmented or transparently colored, is applied to this release coating as a covering layer.
  • This polyurethane is applied dry in a thickness of 15 gr / m2.
  • a polyamide with a thickness of 45 gr / m2 is applied to this leveling layer as an adhesive.
  • the coated film is placed with its adhesive side on the sanded surface of the split leather and at a pressure of 40 Kp / m2 and a temperature of 130 degrees C for 3 seconds. pressed.
  • the press die has a scar plate with a scar structure that shapes the covering layer. After pressing, the plastic film with the separating layer is removed from the cover layer.
  • a polyurethane is spread onto siliconized paper with a grain structure, which is then coated with a thermally activatable compensation layer from a wide-layer nozzle.
  • a polyester can be used as a leveling layer resin from Dynamit AG with a weight of 25 gr / cm2 can be used.
  • This leveling layer can be colored with a soluble dye. Sudan dye from BASF can be used as the soluble dye.
  • the siliconized paper is placed on a scar plate by hand.
  • the base leather to be processed is then placed on the siliconized paper on its surface facing away from the paper, and the table press is then moved in the direction of the abutment.
  • the leveling layer presses itself into the unevenness of the base leather and creates a surface layer surface that is adapted to the grain of the grain plate.
  • the pressing process continues until the leveling layer has firmly adhered to the base leather surface. The time is so short that the heat necessary to heat the compensation layer cannot penetrate the base leather. After the pressing process has ended, the table press is lifted off the abutment so that the base leather can be removed from the scar plate. The paper is then removed from the top layer surface.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP88109879A 1987-06-24 1988-06-22 Matériau en cuir ainsi que procédé et appareillage pour le fabriquer Withdrawn EP0296542A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3720776 1987-06-24
DE19873720776 DE3720776A1 (de) 1987-06-24 1987-06-24 Ledermaterial sowie verfahren und vorrichtung zu seiner herstellung

Publications (2)

Publication Number Publication Date
EP0296542A2 true EP0296542A2 (fr) 1988-12-28
EP0296542A3 EP0296542A3 (fr) 1990-07-25

Family

ID=6330145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109879A Withdrawn EP0296542A3 (fr) 1987-06-24 1988-06-22 Matériau en cuir ainsi que procédé et appareillage pour le fabriquer

Country Status (15)

Country Link
EP (1) EP0296542A3 (fr)
JP (1) JPS6433200A (fr)
KR (1) KR890000242A (fr)
CN (1) CN1036408A (fr)
BR (1) BR8803082A (fr)
CZ (1) CZ279146B6 (fr)
DD (1) DD281817A5 (fr)
DE (1) DE3720776A1 (fr)
HU (1) HUT57835A (fr)
IN (1) IN170951B (fr)
MX (1) MX169684B (fr)
PT (1) PT87813B (fr)
RU (1) RU2067622C1 (fr)
YU (1) YU46629B (fr)
ZA (1) ZA884221B (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
IT201900011601A1 (it) * 2019-07-12 2021-01-12 Cos T A S R L Impianto per la nobilitazione di pelli e procedimento per la nobilitazione di pelli
WO2021009642A1 (fr) * 2019-07-12 2021-01-21 Cos.T.A. S.R.L. Installation pour ennoblir des peaux et procédé d'ennoblissement de peaux

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DE9006024U1 (de) * 1990-05-28 1990-11-29 Rolf, Matthias, Dr., 3000 Hannover Plattenformatiger Fußboden- und Wandbelag aus Leder
US5457361A (en) * 1992-02-17 1995-10-10 Mitsubishi Denki Kabushiki Kaisha Ion removing device, ion removing method and electron accumulating ring having ion removing device
DE19510240A1 (de) * 1994-03-29 1995-10-05 Philipp Schaefer Leder oder Kunstleder
DE9406225U1 (de) * 1994-04-14 1994-08-11 Schaefer, Philipp, 30519 Hannover Vollnarbiges Naturleder
DE29806416U1 (de) * 1998-04-08 1998-07-30 Schaefer, Philipp, 30519 Hannover Ziegenleder mit einer genarbten Beschichtung
DE29902635U1 (de) 1999-02-15 1999-05-06 Schaefer, Philipp, 30519 Hannover Mit einer Zurichtung versehenes Narbenleder
AT3436U1 (de) 1999-04-13 2000-03-27 Schaefer Philipp An seiner oberfläche mit einer zurichtung versehenes leder und verfahren zur herstellung desselben
CN1321197C (zh) * 2005-06-29 2007-06-13 广州市晶鼎恒艺科技有限公司 真皮转移涂饰制作方法
EP1882610A3 (fr) 2006-07-28 2011-08-31 Se Basf Siège de véhicule et substrat adapté
DE202008004906U1 (de) 2008-02-13 2008-06-19 Schaefer, Philipp Beschichtetes Spaltleder
JP5421907B2 (ja) * 2008-05-16 2014-02-19 ミドリホクヨー株式会社 トップコート
CN104017919B (zh) * 2014-06-25 2015-10-14 四川非意欧国际皮革制品有限公司 流水线式气动皮革热压粘合机及其生产工艺
GB201418007D0 (en) 2014-10-10 2014-11-26 Xeros Ltd Animal skin substrate Treatment apparatus and method
CN108161587A (zh) * 2018-02-07 2018-06-15 海宁星皓进出口有限公司 一种防腐蚀型仿皮革复合面料的制作工艺

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WO2021009642A1 (fr) * 2019-07-12 2021-01-21 Cos.T.A. S.R.L. Installation pour ennoblir des peaux et procédé d'ennoblissement de peaux

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CN1036408A (zh) 1989-10-18
MX169684B (es) 1993-07-19
IN170951B (fr) 1992-06-20
CZ279146B6 (cs) 1995-01-18
RU2067622C1 (ru) 1996-10-10
PT87813A (pt) 1989-05-31
KR890000242A (ko) 1989-03-13
JPS6433200A (en) 1989-02-03
DD281817A5 (de) 1990-08-22
HUT57835A (en) 1991-12-30
ZA884221B (fr) 1988-12-22
PT87813B (pt) 1994-03-31
EP0296542A3 (fr) 1990-07-25
CS8804451A2 (en) 1990-03-14
YU46629B (sh) 1994-01-20
BR8803082A (pt) 1989-01-10
YU121288A (en) 1989-10-31
DE3720776A1 (de) 1989-01-12

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