WO2007115680A1 - Expansion sans pression au moyen d'ir - Google Patents

Expansion sans pression au moyen d'ir Download PDF

Info

Publication number
WO2007115680A1
WO2007115680A1 PCT/EP2007/002680 EP2007002680W WO2007115680A1 WO 2007115680 A1 WO2007115680 A1 WO 2007115680A1 EP 2007002680 W EP2007002680 W EP 2007002680W WO 2007115680 A1 WO2007115680 A1 WO 2007115680A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic dispersion
leather
infrared
solidified
dispersion
Prior art date
Application number
PCT/EP2007/002680
Other languages
German (de)
English (en)
Inventor
Philipp Schäfer
Original Assignee
Lanxess Deutschland 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 Lanxess Deutschland Gmbh filed Critical Lanxess Deutschland Gmbh
Priority to PL07723626T priority Critical patent/PL2004864T3/pl
Priority to AT07723626T priority patent/ATE488607T1/de
Priority to EP07723626A priority patent/EP2004864B1/fr
Priority to KR1020087024217A priority patent/KR101437697B1/ko
Priority to CN2007800124163A priority patent/CN101415845B/zh
Priority to MX2008012667A priority patent/MX2008012667A/es
Priority to DE502007005675T priority patent/DE502007005675D1/de
Publication of WO2007115680A1 publication Critical patent/WO2007115680A1/fr
Priority to NO20084417A priority patent/NO20084417L/no

Links

Classifications

    • 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
    • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
    • 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
    • C14C11/003—Surface finishing of leather using macromolecular compounds
    • 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
    • C14C13/00—Manufacture of special kinds or leather, e.g. vellum
    • 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
    • C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
    • 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
    • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
    • C14C9/04—Fixing tanning agents in the leather

Definitions

  • the invention relates to a method and a device for applying a coating, preferably a base coat, to the grain side of a leather, in particular a cowhide, wherein an aqueous, containing a blowing agent containing compact particles
  • Plastic dispersion is applied to this grain side and solidify and are formed by supplying heat from the compact micro hollow microspheres.
  • This thick foam coating has a cushioning function, it has more than 10% open cells, and can not be used as a base coat.
  • AT 006040 U1 discloses a leather and a method for producing the same, in which the rear side of the leather opposite the visible side is provided with a foam finish which is obtained by solidification of a finished, applied liquid
  • Hollow microspheres containing plastic material is formed by brief exposure to hot air.
  • the hot air in this case has a temperature of more than 280 0 C, preferably a temperature between 350 0 C and 650 0 C, is thus very hot and dry, which leads to the fact that the leather is deprived of natural moisture, and that it shrinks and hardens. Furthermore, due to the large heat, the hollow microspheres in the top of the hot air.
  • this coating can not be used as a base coat for the construction of further finishing finishes.
  • Plastic dispersion by the application of infrared radiation leads to a very turbulent, uneven and therefore unsightly surface covered by the hollow microspheres, which is unsuitable in particular as a primer coating for a finish application to be applied subsequently.
  • plastic dispersion is applied.
  • the application takes place here in thin layers between 0.015 mm and 0.08 mm, either via rollers that rotate in the opposite direction to the transport direction of the leather, or preferably by spraying, because then the thin plastic dispersion better even in fine depressions from the leather surface starting deep in the leather penetrates.
  • the application can also be done manually, e.g. by the so-called plush.
  • the present invention has set itself the task of avoiding the disadvantages of the known, provided with a foam coating leather and a leather, in particular a cowhide, which has a foam coating on its grain side, based on economic
  • the heat supply to form the hollow microspheres from the compact particles be effected by the solidified plastic dispersion containing the compact particles having an infrared radiation with a wavelength between 0.7 .mu.m and 100 .mu.m is suspended.
  • the compact particles containing solidified plastic dispersion of infrared dark radiation having a wavelength between 2 microns and 10 microns is exposed, since in this case a deep penetration of heat is ensured in the leather and therefore uniform heating of the solidified plastic dispersion to form the hollow microspheres is ensured in all areas within a short time. It is sufficient if, according to the invention, the compact particles containing, solidified plastic dispersion during a period of less than 30 sec, preferably less than 20 sec, is exposed to infrared radiation.
  • thermoplastic and / or thermoelastic plastic dispersions which contain a propellant having compact particles.
  • These compact particles consist in a known manner of a thermoplastic or plastic copolymer, preferably of polyvinylidene chloride copolymer, as
  • Propellant for example, isobutane
  • Propellant for example, isobutane
  • a plastic dispersion which preferably contains a wetting agent and / or density-increasing additives, such as barite, they penetrate easily into the depressions on the leather surface.
  • Particularly suitable are soft plastic dispersions having a hardness of less than 70 Shore A. The preferred viscosity of
  • Plastic dispersion is, in particular when applied with a spray device or by so-called plush, in which the low-viscosity plastic dispersion penetrates particularly deep into the finest wells on the leather, in the range between 5 sec and 15 sec, measured in a Ford cup with a nozzle diameter of 6 mm. If the plastic dispersion is applied to it by means of a roller rotating in opposite directions to the direction of transport of the leather in order to assist penetration of the plastic dispersion into the depressions on the leather surface, the viscosity is between 10 and 40 sec measured in a Ford cup with a diameter of 6 mm.
  • the device according to the invention for applying a coating, preferably a base coat, to the grain side of a leather comprising a known application device for Application of an aqueous, compact particle containing plastic dispersion containing a blowing agent on the grain side of the leather and a solidifying the plastic dispersion causing heat source, characterized in that an infrared radiator is provided with directed against the solidified plastic dispersion beam surface, the infrared rays having a wavelength between 0, 7 pm and 10 pm out.
  • an infrared dimmer is provided, the beam surface emits infrared rays with a wavelength between 2 microns and 10 microns.
  • the use of such an infrared radiator causes uniform heat supply in all areas of the solidified plastic dispersion, even in the deeper areas of the same, namely where the plastic dispersion has penetrated before their solidification in Narbge wisdomen,
  • Micro hollow spheres are formed and thus also in these areas creates a foam structure that is not subject to shrinking.
  • the jet surface of the infrared radiator is provided at a distance from the surface of the solidified plastic dispersion between 45 mm and 220 mm.
  • a continuous production process is achieved in that the infrared radiator above a circulating the leather supported with the solidified plastic dispersion
  • Transport device is arranged so that the formation of the hollow microspheres in the solidified
  • the transport device expediently consists of a plurality of spaced, parallel, circumferential plastic threads, such as polyamide or polyester threads. Such plastic threads are not heated as much by the infrared rays as the leather, which contains moisture, so that they endure the temperature caused by the infrared radiation as a continuous load.
  • the infrared radiator is designed as a surface radiator, so that the moving means of the transport device below the infrared radiator leather is extensively exposed to the infrared radiation.
  • the infrared radiator seen in the direction of transport of the leather, is provided for a traversed by the leather drying tunnel, so that the applied to the leather plastic dispersion after passing through the drying tunnel not only anhydrous and therefore solidified, but the leather and the solidified plastic dispersion at an action of infrared radiation already at a temperature between 65 ° C and 80 0 C. exhibit.
  • the heating can be done by means of infrared radiation at a temperature of 105 0 C in less than 12 sec.
  • a drying tunnel is also provided behind the infrared radiator, in which drying of the leather provided with the foam coating takes place.
  • the leather produced with the device according to the invention is characterized in that the coating treated with infrared radiation has on its surface a homogeneous, nubuck-like, recess-free appearance, such as finely grained grain leather, even having a slight writing effect typical of nubuck, and microscopically the finest Has pores with an inner diameter of less than 35 ⁇ m.
  • the closed pores are close to each other and consist of well-formed hollow microspheres, whose shells viewed under the microscope at 25x magnification, the color of the coating in color transparent form. If, for example, the coating is blue, then the shells of the hollow microspheres are transparent blue.
  • the coating of such a leather contains pigments and / or a
  • Silicone emulsion preferably a silicone dispersion having a solids content of more than 2 wt .-%, based on the solidified plastic dispersion and a crosslinking agent.
  • an additional finish layer can be omitted.
  • Such a leather despite its softness is not or almost not losnarbig.
  • this leather has an optimum appearance because when compressed, many small wrinkles are formed which have the appearance of high-grade full-grain aniline leather. Due to the nubuck-like appearance of the surface of the base coat, a subsequently applied finish coat can also be mechanically anchored.
  • the coating of the leather can be treated after formation of the hollow microspheres on the surface with very fine sandpaper so that only the foam structure having a coating, but not the natural grain layer is removed.
  • such a leather is particularly suitable for the production of automotive components, in which the leather is drawn into molds and optionally backfoamed.
  • Fig. 1 shows the principle of the device according to the invention and Fig. 2 shows schematically an embodiment of this device.
  • a leather 3 is supported on the in a manner not shown, known per se, for example by spraying or by roller application, preferably by a counter-rotating to the transport direction 1 applicator roll, an aqueous, compact particles containing plastic dispersion 4 was applied by heat, for example by means of
  • the transport device 2 consists expediently of a plurality of spaced, parallel polyamide or polyester threads, between which spaces are kept free. These threads are shown enlarged in the drawing. In practice, its diameter is less than 4 mm.
  • Infrared radiator 5 is provided, from whose planar radiation surface 6 infrared radiation with a wavelength between 0.7 .mu.m and 100 .mu.m emerges in the direction of the solidified plastic dispersion 4.
  • micro hollow balls 7 are formed when passing the provided with the solidified plastic dispersion 4 leather 3 from the compact particles within a very short time, so that on the leather a foam coating is formed on their
  • the hollow microspheres 7 are shown for better visibility because of enlarged.
  • the distance a between the radiation surface 6 and the top of the solidified plastic dispersion 4 is between 45 mm and 220 mm and is chosen so that the formation of the hollow microspheres 7 is ensured within a period of less than 30 sec.
  • a hot air duct 9 is provided, in which over the interstices between the polyamide or polyester threads and the underside of the leather 3 warm air can be supplied.
  • the complete solidification of the applied on the leather 3 plastic dispersion 4, and a preheating to usually between 65 ° C and 80 0 C before the formation of the hollow microspheres 7 takes place from the compact particles in the infrared radiator 5.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé d'application d'un revêtement, de préférence un revêtement de base, sur le côté fleur d'un cuir, en particulier d'un cuir de boeuf, procédé dans lequel une dispersion plastique aqueuse (4) comprenant des particules compactes contenant un propulseur est appliquée sur ledit côté fleur, et rendu adhérente, cependant qu'il se forme par apport de chaleur, des sphères creuses microscopiques (7) à partir des particules compactes. L'invention est caractérisée en ce que la dispersion plastique adhérente, contenant les particules compactes (4) est exposée à un rayonnement infrarouge de longueur d'onde comprise entre 0,7 µm et 100 µm.
PCT/EP2007/002680 2006-04-05 2007-03-27 Expansion sans pression au moyen d'ir WO2007115680A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
PL07723626T PL2004864T3 (pl) 2006-04-05 2007-03-27 Bezciśnieniowa ekspansja za pomocą IR
AT07723626T ATE488607T1 (de) 2006-04-05 2007-03-27 Drucklose expansion mittels ir
EP07723626A EP2004864B1 (fr) 2006-04-05 2007-03-27 Expansion sans pression au moyen d'ir
KR1020087024217A KR101437697B1 (ko) 2006-04-05 2007-03-27 Ｉｒ에 의한 비가압 팽창
CN2007800124163A CN101415845B (zh) 2006-04-05 2007-03-27 借助红外线的无压力膨胀
MX2008012667A MX2008012667A (es) 2006-04-05 2007-03-27 Expansion sin presion por medio de ir.
DE502007005675T DE502007005675D1 (de) 2006-04-05 2007-03-27 Drucklose expansion mittels ir
NO20084417A NO20084417L (no) 2006-04-05 2008-10-21 Trykklos ekspansjon ved hjelp av IR

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT267/2006 2006-04-05
AT0026706U AT8680U1 (de) 2006-04-05 2006-04-05 Verfahren und vorrichtung zum aufbringen einer beschichtung auf die narbenseite eines leders

Publications (1)

Publication Number Publication Date
WO2007115680A1 true WO2007115680A1 (fr) 2007-10-18

Family

ID=41128124

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/002680 WO2007115680A1 (fr) 2006-04-05 2007-03-27 Expansion sans pression au moyen d'ir

Country Status (11)

Country Link
EP (1) EP2004864B1 (fr)
KR (1) KR101437697B1 (fr)
CN (2) CN101415845B (fr)
AR (1) AR060298A1 (fr)
AT (2) AT8680U1 (fr)
DE (2) DE202006016363U1 (fr)
MX (1) MX2008012667A (fr)
NO (1) NO20084417L (fr)
PL (1) PL2004864T3 (fr)
WO (1) WO2007115680A1 (fr)
ZA (1) ZA200808048B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014047300A1 (fr) * 2012-09-21 2014-03-27 Eagle Ottawa, Llc Procédé et système de durcissement de finissage pour substrats à base de cuir

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013225132A1 (de) 2013-12-06 2015-06-11 Evonik Industries Ag Vorschäumung von Poly(meth)acrylimid-Partikeln für das anschließende Formschäumen in geschlossenen Werkzeugen
CN108014958A (zh) * 2017-12-29 2018-05-11 重庆捷科隆金属科技有限公司 一种金属件的防腐处理设备
IT202200011222A1 (it) 2022-05-27 2023-11-27 Lamberti Spa Nobilitazione di pelli in crust

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06192459A (ja) * 1992-12-25 1994-07-12 Three Bond Co Ltd 近赤外光硬化型発泡樹脂組成物
US6231932B1 (en) * 1999-05-26 2001-05-15 Ppg Industries Ohio, Inc. Processes for drying topcoats and multicomponent composite coatings on metal and polymeric substrates
DE20117724U1 (de) * 2001-10-04 2002-01-31 Schaefer Philipp Vollnarbiges Rindnappaleder
AT5281U1 (de) 1999-09-13 2002-05-27 Schaefer Philipp Leder, insbesondere narbenleder oder mit einer zurichtung versehenes spaltleder, das an seiner der sichtseite gegenüberliegenden rückseite eine schicht aufweist, sowie verfahren zur herstellung eines solchen leders
EP1279746A1 (fr) * 2001-12-21 2003-01-29 AKZO Nobel N.V. Procédé de préparation de cuir
AT6040U1 (de) 2002-04-19 2003-03-25 Schaefer Philipp Leder und verfahren zur herstellung desselben
DE20318311U1 (de) 2003-10-20 2004-02-12 Schaefer, Philipp Vollnarbiges Leder, dessen Fehlstellen in der Narbenschicht beseitigt sind

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06192459A (ja) * 1992-12-25 1994-07-12 Three Bond Co Ltd 近赤外光硬化型発泡樹脂組成物
US6231932B1 (en) * 1999-05-26 2001-05-15 Ppg Industries Ohio, Inc. Processes for drying topcoats and multicomponent composite coatings on metal and polymeric substrates
AT5281U1 (de) 1999-09-13 2002-05-27 Schaefer Philipp Leder, insbesondere narbenleder oder mit einer zurichtung versehenes spaltleder, das an seiner der sichtseite gegenüberliegenden rückseite eine schicht aufweist, sowie verfahren zur herstellung eines solchen leders
DE20117724U1 (de) * 2001-10-04 2002-01-31 Schaefer Philipp Vollnarbiges Rindnappaleder
EP1279746A1 (fr) * 2001-12-21 2003-01-29 AKZO Nobel N.V. Procédé de préparation de cuir
AT6040U1 (de) 2002-04-19 2003-03-25 Schaefer Philipp Leder und verfahren zur herstellung desselben
DE20318311U1 (de) 2003-10-20 2004-02-12 Schaefer, Philipp Vollnarbiges Leder, dessen Fehlstellen in der Narbenschicht beseitigt sind

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199432, Derwent World Patents Index; AN 1994-260634, XP002447047 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014047300A1 (fr) * 2012-09-21 2014-03-27 Eagle Ottawa, Llc Procédé et système de durcissement de finissage pour substrats à base de cuir

Also Published As

Publication number Publication date
ZA200808048B (en) 2009-12-30
EP2004864A1 (fr) 2008-12-24
KR101437697B1 (ko) 2014-09-03
AT8680U1 (de) 2006-11-15
DE202006016363U1 (de) 2007-02-01
KR20080111031A (ko) 2008-12-22
MX2008012667A (es) 2009-02-03
ATE488607T1 (de) 2010-12-15
AR060298A1 (es) 2008-06-04
DE502007005675D1 (de) 2010-12-30
CN101415845B (zh) 2012-12-05
PL2004864T3 (pl) 2011-04-29
CN101415845A (zh) 2009-04-22
EP2004864B1 (fr) 2010-11-17
NO20084417L (no) 2008-10-28
CN102787184A (zh) 2012-11-21

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