WO2014096910A1 - Procédé et appareil pour sécher des peaux pendant le processus de finition - Google Patents

Procédé et appareil pour sécher des peaux pendant le processus de finition Download PDF

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Publication number
WO2014096910A1
WO2014096910A1 PCT/IB2012/057798 IB2012057798W WO2014096910A1 WO 2014096910 A1 WO2014096910 A1 WO 2014096910A1 IB 2012057798 W IB2012057798 W IB 2012057798W WO 2014096910 A1 WO2014096910 A1 WO 2014096910A1
Authority
WO
WIPO (PCT)
Prior art keywords
hides
layer
finishing
drying
liquid
Prior art date
Application number
PCT/IB2012/057798
Other languages
English (en)
Inventor
Antonio Polato
Original Assignee
Officine Di Cartigliano S.P.A.
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 Officine Di Cartigliano S.P.A. filed Critical Officine Di Cartigliano S.P.A.
Priority to MX2015007924A priority Critical patent/MX364843B/es
Priority to EP12829162.2A priority patent/EP2935631B1/fr
Priority to CN201280078219.2A priority patent/CN105008552B/zh
Priority to KR1020157019373A priority patent/KR101940852B1/ko
Priority to ES12829162.2T priority patent/ES2613762T3/es
Priority to BR112015014689-9A priority patent/BR112015014689B1/pt
Publication of WO2014096910A1 publication Critical patent/WO2014096910A1/fr

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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
    • C14B1/58—Drying
    • 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
    • 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
    • C14B2700/00—Mechanical treatment or processing of skins, hides or leather in general; Pelt-shearing machines; Making driving belts; Machines for splitting intestines
    • C14B2700/07—Leather tensioning or stretching frames; Stretching-machines; Setting-out boards; Pasting boards; Fastening devices; Drying of leather

Definitions

  • the present invention generally finds application in the field of tanning and nonwoven (imitation leather) fabrics, and particularly relates to a method of forming crust leather by drying, during the finishing process.
  • the invention in another aspect, relates to an apparatus for drying hides (crust) that uses the method.
  • the dried hides undergo a process typically known as finishing, whereby such defects are removed or made less visible, for better use of the hides.
  • Finishing may be a mechanical or chemical process.
  • chemical finishing which is the one of interest herein, the hides are coated with generally liquid products, which are designed to form a grain side layer that may have various thicknesses or be elastic or tough according to the type of finishing and leather.
  • the finishing products may be selected, for instance, from the group of synthetic (acrylic, butadiene, polyurethane) resins or natural binders (caseins, albumins, protein-based film-forming agents, based on modified cellulose) possibly added with pigments, dyes, opacifiers, polishing agents, various auxiliary additives. These products are mixed with 20% to 40%, preferably 25% to 30% water, based on the total mass. The aqueous solution is deposited on the grain side of the hides and forms a film that is designed to intimately bind with the fibers, to become integral with the hide.
  • the finishing liquid may be applied essentially using three methods: spray, roller or curtain coating.
  • the spray coating method consists in applying finishing chemicals to the hide surface, in automatic spray lines where hides are laid on appropriate belt conveyors, and their surface is sprayed in tunnels or cabins by rotating or reciprocating guns (curtain coating machine).
  • the roller coating method is carried out in a roller coating unit, with rollers designed to transfer the substances to the hide surface.
  • the unit has a metal roller with a given pattern engraved thereon, which is dipped in the finishing liquid bath, and a blade, which is used to limit the amount of liquid being transferred.
  • the hide contacts the product-wetted roller and is supported by an opposed conveying roller. This will optimize the finishing process. A continuous, uniform and easily adjustable coating is obtained.
  • a further layer of a fixing agent is typically deposited, for stabilization and preservation of the underlying finishing layer.
  • This layer of fixing agent should also undergo drying in a hot air tunnel as described above.
  • the drying process has been typically carried out to date using an oven or a tunnel operating with infrared rays, catalytic gas and more often with hot air.
  • FIG. 1 shows a typical finishing plant R comprising two spray units R1 with two air drying tunnels T1 , T2 downstream therefrom, between the two paint and fixing agent coating stations, and upstream from a chiller C and a staker K for imparting softness to the hides again.
  • Hot air is conveyed into the tunnels T1 , T2, using high-capacity compressors and blowers, with a capacity of thousands of cubic meters/hour.
  • the drying temperatures in these apparatus generally range from 80 °C to 1 20 °C.
  • a further drawback is that after the deposition of the finishing layer, the dried hides have a hot surface and cannot be easily handled and stacked. Therefore, completely dried hides shall be typically cooled using a cooling device, such as a cold air chiller, which has high power consumption.
  • any shrinking effect of the hot drying process will cause unevenness and some skrinkage in the hides, thereby leading to a significant reduction of the useful leather area, and to a reduction of the final inherent value of the treated hides.
  • the object of the present invention is to obviate or at least alleviate the above drawbacks, by providing a method and an apparatus for drying crust hides during finishing, that is highly efficient and relatively cost- effective.
  • Another object of the invention is to provide a drying method that uses a lower temperature than prior art drying methods.
  • a further object of the invention is to provide a drying method that has a lower power consumption and minimizes the costs of the final product.
  • Another object of the invention is to provide a drying method performed after finishing that maintains the useful area of the finished hides substantially unaltered.
  • Yet another object is to devise a drying method performed during finishing that does not harden hides and maintains the hand of the treated hides.
  • drying and the whole finishing process will have very low running costs.
  • power consumption will be about 1 electric kW per liter of extracted water.
  • drying process will be substantially uniform and require very little moisture extraction, thereby avoiding the infiltration of dust and other foreign matter.
  • the invention relates to a plant for drying hides being finished, as defined in claim 7.
  • FIG. 1 is a general view of a prior art finishing plant using hot air drying tunnels
  • FIG. 2 is a perspective view of a finishing plant which incorporates drying apparatus of the invention ;
  • FIG. 3 shows a side view of a detail of FIG. 2 in an enlarged scale
  • FIG. 4 is a partially broken-away side view of the apparatus of FIG. 3;
  • FIG. 5 is a front view of the apparatus of FIG. 3;
  • FIG. 6 shows a block diagram of the drying method of the invention.
  • the drying plant of the invention is designed to be part of a plant for finishing crust hides P, generally referenced R.
  • the finishing plant R comprises, as is known in the art, a first finishing unit R1 , for depositing a first layer or film S' of a liquid finishing product on a surface of the hides P, on the grain side or the flesh side.
  • the first finishing unit R1 has an inlet section I for the hides P to be treated and an outlet section O for the treated hides.
  • a moving transfer surface is interposed between the inlet I and the outlet O, for automatically and continuously feeding the hides P in a predetermined direction V.
  • the finishing unit R1 may be of spray, roller or curtain coating type, as is known per se and not included in the scope of the present invention, for spraying or spreading the finishing solution on one face of the hides P being treated.
  • the rate of the finishing solution will range from 3 to 30 g/inch 2 .
  • a second finishing unit R2 is provided, substantially identical to the first, for uniform application of a second layer S" of a liquid product on the first layer S', for stabilizing and protecting said first layer.
  • the rate of the fixing solution will range from 2 to 1 5 g/inch 2 .
  • a first drying apparatus 1 of the invention is placed downstream from the first finishing unit R1 , and has a frame that supports a shielding tunnel 2 having an inlet 3 and an outlet 4.
  • a moving transfer surface 5 slides in the tunnel 2, for feeding hides lying thereon in the direction V.
  • the moving transfer surface 5 may consist of a belt conveyor or annular wires subtended by end rollers 6, 7, one of which is motorized, for automatic feeding of the hides P.
  • An electromagnetic wave irradiator irradiating waves in the RF range, generally referenced 8, is placed in the shielding tunnel 2 and is designed to irradiate the surface of the hides P to be dried.
  • the irradiator 8 essentially comprises a series of upper electrodes 9 and a series of lower electrodes 1 0 located on each side of the belt conveyor 5 to irradiate the opposite surfaces of the hides P.
  • the upper electrodes 9 and the lower electrodes 1 0 have such a size as to ensure substantially complete drying of the first finishing layer S'.
  • the electrodes 9, 1 0 are connected to a high frequency voltage and current generator 1 1 , as is known per se and within the reach of the skilled person, which is controlled by an inverter 1 2 or by mechanical electrode adjustment 1 2 located in a cabinet 1 3, which will allow control of the supply voltage and current to the electrodes of the irradiator 8.
  • the irradiator 8 will be adjusted to ensure extraction of at least an amount of liquid ranging from 5 to 20 g/inch 2 .
  • a second drying apparatus 1 ' substantially identical to the first 1 is located downstream from the second finishing unit R2, and is adjusted to ensure extraction of at least an amount of liquid ranging from 3 to 30 g/inch 2 .
  • the final temperature of hides does not exceed 40 °C, and is preferably lower than 30 °C.
  • the finishing liquids are known to be aqueous solutions of organic and pigmenting products, representing about 20% to 40%, preferably about 25% to 30% based on the total weight of the solution.
  • the organic component of the finishing layer deposited on the hide is almost instantaneously dried and cross-linked, and forms some sort of impermeable film on the grain side. Therefore, the interfibrillar water molecules cannot come out of the grain side, due to the presence of the impermeable film, and are forced to penetrate the leather fibers in the downward direction, to come out of the flesh side, where not impermeable barrier exists. Such penetration actually provides a one-way pumping effect toward the side opposite to the finishing side.
  • Such one-way pumping of water molecules was surprisingly found to open out the fibers and to impart superior softness to the hide, as well as a hand that avoids crutch staking.
  • the overall power consumption will be about 1 electric kW per liter of extracted water.
  • the drying apparatus 1 of the invention may be used with any existing finishing plant, using the belt conveyors 6 of the finishing plant as a moving transfer surface, and placing the pairs of electrodes of the first 12 and second 1 3 drying units on each side of the common belt conveyor 6.
  • FIG. 6 shows a block diagram of the drying method of the invention, when used with a per-se known finishing process.
  • the method comprises at least one step a) of substantially evenly applying a first layer S' of a finishing product solution on one surface of the hides.
  • This step is followed by at least one second step c) of evenly distributing a second layer S" of a liquid fixing agent on the first layer S', for stabilizing and protecting the first layer S'.
  • the drying method comprises, after each of the steps a) of applying the first layer S' and b) of distributing the second layer S", a first step b) and a second step d) of irradiating the wet portion of the hides P with an alternating electromagnetic field whose frequency is within the RF range, for substantially complete drying of said first and said second layers.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Drying Of Solid Materials (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Coloring (AREA)

Abstract

La présente invention concerne un procédé de séchage de peaux (P) pendant le processus de finition. Le procédé de finition comprend au moins une première étape a) de dépôt d'une première couche (S') de mélange de revêtement ou de finition liquide ou de fin de mélange sur les peaux (P), éventuellement suivie d'une deuxième étape c) de dépôt d'une deuxième couche d'un agent de fixation (S") sur la première couche (S'). Le séchage comprend une première étape b) d'irradiation de la première couche de finition (S') avec un champ électromagnétique alternatif dont la fréquence est dans la plage RF, pour le séchage sensiblement complet de la première couche (S'), suivi d'une deuxième étape d) d'irradiation de la deuxième couche d'agent de fixation (S") déposée dans ladite deuxième étape de dépôt c). Un appareil pour sécher des peaux (P) pendant le processus de finition, qui est conçu pour être situé dans une installation de finition de cuir (R) comprend un tunnel de protection (2), dans lequel sont disposés une surface de transfert de mouvement (5) pour faire avancer les peaux dans une direction prédéterminée (V) et un dispositif d'irradiation d'ondes électromagnétiques (8) pour irradier des ondes dans la gamme RF, qui est dirigée vers la surface des peaux (P) enduites avec les couches (S', S").
PCT/IB2012/057798 2012-12-19 2012-12-28 Procédé et appareil pour sécher des peaux pendant le processus de finition WO2014096910A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
MX2015007924A MX364843B (es) 2012-12-19 2012-12-28 Metodo y aparato para secar pieles durante el proceso de acabado.
EP12829162.2A EP2935631B1 (fr) 2012-12-19 2012-12-28 Procédé et appareil pour sécher des peaux pendant le processus de finition
CN201280078219.2A CN105008552B (zh) 2012-12-19 2012-12-28 在涂饰工序期间用于干燥生皮的方法及装置
KR1020157019373A KR101940852B1 (ko) 2012-12-19 2012-12-28 마감 공정 동안 하이드를 건조시키기 위한 방법 및 장치
ES12829162.2T ES2613762T3 (es) 2012-12-19 2012-12-28 Método y aparato para secar pieles durante el proceso de acabado
BR112015014689-9A BR112015014689B1 (pt) 2012-12-19 2012-12-28 Método de acabamento de couros crus secados e instalação para o acabamento de couros crus secados

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI2012A000338 2012-12-19
IT000338A ITVI20120338A1 (it) 2012-12-19 2012-12-19 Metodo ed apparato per l'essicatura di pelli durante il processo di rifinizione

Publications (1)

Publication Number Publication Date
WO2014096910A1 true WO2014096910A1 (fr) 2014-06-26

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ID=47633498

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/057798 WO2014096910A1 (fr) 2012-12-19 2012-12-28 Procédé et appareil pour sécher des peaux pendant le processus de finition

Country Status (9)

Country Link
EP (1) EP2935631B1 (fr)
KR (1) KR101940852B1 (fr)
CN (1) CN105008552B (fr)
BR (1) BR112015014689B1 (fr)
ES (1) ES2613762T3 (fr)
IT (1) ITVI20120338A1 (fr)
MX (1) MX364843B (fr)
PT (1) PT2935631T (fr)
WO (1) WO2014096910A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2651594C1 (ru) * 2017-04-25 2018-04-23 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Микроволновая сушилка пушно-мехового сырья роторного типа
RU2651593C1 (ru) * 2017-04-24 2018-04-23 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Аэродинамическая сушилка пушно-мехового сырья с воздействием электромагнитного поля сверхвысокой частоты
RU2655748C1 (ru) * 2017-07-03 2018-05-29 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Микроволновая установка, обеспечивающая отделение меха от кожи шкур кроликов
RU2655770C1 (ru) * 2017-04-24 2018-05-29 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Сверхвысокочастотная установка с передвижными цилиндрическими резонаторами для сушки пушно-мехового сырья в непрерывном режиме
IT201700037050A1 (it) * 2017-04-04 2018-10-04 Ge Ma Ta Spa Apparato per la deposizione in continuo di due differenti sostanze chimiche su una pelle e metodo per la deposizione in continuo
IT201900025135A1 (it) * 2019-12-20 2021-06-20 Ge Ma Ta Spa Tunnel di asciugatura del film di prodotto chimico depositato sulla superficie della pelle nella fase di rifinizione della pelle stessa e linea di rifinizione di pelli che comprende detto tunnel di asciugatura
IT202000010873A1 (it) * 2020-05-13 2021-11-13 Todesco S R L Metodo, impianto e stazione per la lavorazione di pelli animali
CN116287483A (zh) * 2023-03-23 2023-06-23 桐乡市恒宸皮草有限公司 一种具有往复运动结构的烘干设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2890998T3 (es) * 2017-11-30 2022-01-25 Officine Di Cartigliano S P A Planta para secar productos laminares flexibles pretratados

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WO1986007389A1 (fr) * 1985-06-12 1986-12-18 Jiri Dokoupil Procede et appareil pour conditionnement de cuirs, peaux, fourrures et autres
WO1990005196A1 (fr) * 1988-11-11 1990-05-17 Joachim Spahrmann Dispositif pour secher le cuir et des matieres du meme type
WO1990013671A1 (fr) * 1989-05-08 1990-11-15 Jiri Dokoupil Procede et dispositif pour le traitement de pieces de materiau plat souples
US5048455A (en) * 1987-06-23 1991-09-17 Centre Technique Cuir Chaussure Process and apparatus for automatic finishing of flexible materials, and particularly leathers and hides
EP0739715A2 (fr) * 1995-04-27 1996-10-30 Gidue S.R.L. Procédé pour embellir des peaux et installation pour mettre en oeuvre ce procédé
WO2006100055A1 (fr) * 2005-03-23 2006-09-28 Cos.T.A. S.R.L. Procede de finition du cuir ou d'un materiau revetu d'une feuille et usine de fabrication correspondante
WO2011045666A1 (fr) * 2009-10-16 2011-04-21 Feltre Srl Système de séchage amélioré

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DK1321731T3 (da) * 2001-12-22 2006-11-13 Moletherm Holding Ag Energitransmitter som bestanddel af et coatings- og/eller törringsanlæg, især til en lakcoating
DE10211293A1 (de) * 2002-03-14 2003-09-25 Basf Ag Verfahren zur automatisierten Oberflächenkontrolle und Oberflächenkorrektur
US20070292702A1 (en) * 2004-08-10 2007-12-20 Rupert Saumweber Water-Repellent and Self-Cleaning Leather
DE102005001683B4 (de) * 2005-01-13 2010-01-14 Venjakob Maschinenbau Gmbh & Co. Kg Verfahren und Vorrichtung zum Trocknen von Lackschichten

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986007389A1 (fr) * 1985-06-12 1986-12-18 Jiri Dokoupil Procede et appareil pour conditionnement de cuirs, peaux, fourrures et autres
US5048455A (en) * 1987-06-23 1991-09-17 Centre Technique Cuir Chaussure Process and apparatus for automatic finishing of flexible materials, and particularly leathers and hides
WO1990005196A1 (fr) * 1988-11-11 1990-05-17 Joachim Spahrmann Dispositif pour secher le cuir et des matieres du meme type
WO1990013671A1 (fr) * 1989-05-08 1990-11-15 Jiri Dokoupil Procede et dispositif pour le traitement de pieces de materiau plat souples
EP0739715A2 (fr) * 1995-04-27 1996-10-30 Gidue S.R.L. Procédé pour embellir des peaux et installation pour mettre en oeuvre ce procédé
WO2006100055A1 (fr) * 2005-03-23 2006-09-28 Cos.T.A. S.R.L. Procede de finition du cuir ou d'un materiau revetu d'une feuille et usine de fabrication correspondante
WO2011045666A1 (fr) * 2009-10-16 2011-04-21 Feltre Srl Système de séchage amélioré

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700037050A1 (it) * 2017-04-04 2018-10-04 Ge Ma Ta Spa Apparato per la deposizione in continuo di due differenti sostanze chimiche su una pelle e metodo per la deposizione in continuo
RU2651593C1 (ru) * 2017-04-24 2018-04-23 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Аэродинамическая сушилка пушно-мехового сырья с воздействием электромагнитного поля сверхвысокой частоты
RU2655770C1 (ru) * 2017-04-24 2018-05-29 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Сверхвысокочастотная установка с передвижными цилиндрическими резонаторами для сушки пушно-мехового сырья в непрерывном режиме
RU2651594C1 (ru) * 2017-04-25 2018-04-23 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Микроволновая сушилка пушно-мехового сырья роторного типа
RU2655748C1 (ru) * 2017-07-03 2018-05-29 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Микроволновая установка, обеспечивающая отделение меха от кожи шкур кроликов
IT201900025135A1 (it) * 2019-12-20 2021-06-20 Ge Ma Ta Spa Tunnel di asciugatura del film di prodotto chimico depositato sulla superficie della pelle nella fase di rifinizione della pelle stessa e linea di rifinizione di pelli che comprende detto tunnel di asciugatura
IT202000010873A1 (it) * 2020-05-13 2021-11-13 Todesco S R L Metodo, impianto e stazione per la lavorazione di pelli animali
WO2021229493A1 (fr) * 2020-05-13 2021-11-18 Todesco Paolo Procédé et système de finition pour peaux tannées ou synthétiques
CN116287483A (zh) * 2023-03-23 2023-06-23 桐乡市恒宸皮草有限公司 一种具有往复运动结构的烘干设备
CN116287483B (zh) * 2023-03-23 2024-02-13 重庆能源职业学院 一种具有往复运动结构的烘干设备

Also Published As

Publication number Publication date
ITVI20120338A1 (it) 2014-06-20
KR20150096512A (ko) 2015-08-24
CN105008552A (zh) 2015-10-28
MX364843B (es) 2019-05-08
BR112015014689B1 (pt) 2021-03-30
EP2935631B1 (fr) 2016-11-16
PT2935631T (pt) 2017-02-03
BR112015014689A2 (pt) 2017-07-11
ES2613762T3 (es) 2017-05-25
MX2015007924A (es) 2016-02-05
CN105008552B (zh) 2017-08-22
KR101940852B1 (ko) 2019-01-21
EP2935631A1 (fr) 2015-10-28

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