EP0929698A1 - Gerbprozess - Google Patents

Gerbprozess

Info

Publication number
EP0929698A1
EP0929698A1 EP97943935A EP97943935A EP0929698A1 EP 0929698 A1 EP0929698 A1 EP 0929698A1 EP 97943935 A EP97943935 A EP 97943935A EP 97943935 A EP97943935 A EP 97943935A EP 0929698 A1 EP0929698 A1 EP 0929698A1
Authority
EP
European Patent Office
Prior art keywords
tanning
leather
skins
leathers
colloidal suspension
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
EP97943935A
Other languages
English (en)
French (fr)
Other versions
EP0929698B1 (de
Inventor
Pierre Rigoulot
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.)
JALLATTE SA
Original Assignee
BEAUD CHALLES SOLAP SA
Beaud-Challes-Solap SA
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 BEAUD CHALLES SOLAP SA, Beaud-Challes-Solap SA filed Critical BEAUD CHALLES SOLAP SA
Publication of EP0929698A1 publication Critical patent/EP0929698A1/de
Application granted granted Critical
Publication of EP0929698B1 publication Critical patent/EP0929698B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • C14C1/00—Chemical treatment prior to tanning
    • 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
    • C14C1/00—Chemical treatment prior to tanning
    • C14C1/08—Deliming; Bating; Pickling; Degreasing
    • 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
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • 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
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/28—Multi-step processes

Definitions

  • the present invention relates to a process for tanning skins for the use of full-grain leathers or crusts obtained by this process in the manufacture of various products such as shoes.
  • the known industrial tanning processes consist of a series of operations aimed at transforming the raw natural skin of animals into leather under the chemical action of tannins or organic or mineral agents, in particular chromium salts.
  • the objective of the tanning processes is to make the skins rot-proof and to give the leather obtained properties of mechanical resistance, in particular of resistance to temperature, suitable for the subsequent manufacturing operations.
  • Existing tanning processes allow this optimization of the properties of leather but prove to be unfavorable to the environment due to the use of metals which are difficult to recycle or eliminate such as chromium.
  • the use of metals such as chromium sometimes causes, due to the allergenic action of the latter, reactions in the user.
  • tanning does not does not apply to crusts which constitute a by-product and therefore does not allow the recovery of the waste obtained after carrying out operations such as slitting and declutching.
  • the shrinkage temperature of the leathers obtained by this tanning process is lower than that of the leathers treated by a chromium tanning process, which could cause problems with the leather's behavior. at the temperature during the stages of manufacture of the finished products and in particular for the manufacture of footwear.
  • the present invention proposes to improve this type of chromium-free tanning process so as to increase the shrinkage temperature of the treated leathers.
  • the invention relates to a process for tanning skins for the preparation of leathers used for the manufacture of finished products requiring high shrinkage temperatures for leathers, in particular of the order of 80 ° C., of the type consisting before washing, washing the skins in a first step, called quenching, then subjecting them to a skinning operation to allow, in a subsequent slitting operation, the separation of the skins from leather on the flower side called leather thereafter leather and leather on the flesh side called crust, alkaline substances such as fatty lime contained in flower leathers being eliminated by neutralization by means of an acid during a so-called deliming operation while the crusts are subjected to a pickling action in order to allow their softening, then to carry out the subsequent tanning operation in two stages, said operation comprising a step of pre-tanning prior to the declutching operation known per se and a tanning step subsequent to the declutching operation known per se, at least said pre-tanning stage consisting in subjecting pickled crusts or
  • tanning agents of silica-based compounds such as aluminosilicates are known, which are used in tanning processes for the manufacture of leather and allow partial or total replacement of the auxiliaries which heavily load the factory waste water.
  • Patent EP-B-0 005 546 proposed to reduce the use of commonly used heavily loaded auxiliaries, in particular chrome tanning materials, by recommending the use of water-insoluble aluminosilicates in combination with di- and / or tricarboxylic acids and / or their partial esters in chrome tanning or in combination tanning with chrome, aluminum and silicon tanning materials.
  • This use of aluminosilicates in combination with di- and / or tricarboxylic acids promotes an economy of the chromium tanning process and a reduction in the burden on the environment.
  • the tanning described in this patent is carried out in the usual manner, the pickling and tanning can be combined in a manner known per se and then the leather is lubricated. About 10 to 50 g are used per liter of aluminum silicate calculated as an anhydrous product in the tanning bath and the acids used are brought into the tanning bath in an amount of 1 to 20 g per liter.
  • the aluminum silicates used during the process are generally in a crystalline or amorphous form, can be synthetic or natural, directly prepared or obtained commercially and preferably have at least partial acid solubility in pH range 2.5 to 5 and preferably 3.5 to 4.5.
  • Patent EP-B-0 007 555 proposes a tanning process recommending the use of water-insoluble aluminosilicates in combination with carboxylic acids containing ester and / or urethane and / or amide groups in chromium tanning or tanning combined with chrome, aluminum and silicon tannins that provide also the same advantages as the process described in EP-B-0 005 546.
  • a mixture, free of chromium sulphate, based on aldehydes, tannins and / or resins is introduced.
  • acrylic and which also comprises a mineral product based on silica so as to obtain leathers treated without the use of chromium having an increased shrinkage temperature compared to leathers treated simply by the mixture free of chromium sulphate and this, unexpectedly.
  • the mineral product based on silica in colloidal suspension is presented as a colloidal suspension of amorphous silica.
  • the invention also relates to a leather obtained by the implementation of the method, characterized in that it is composed of the flesh side or the flower side of a skin.
  • the first operations implemented on a rawhide bought in hair consist of washing and then depilating the skins in order to allow their slitting, that is to say the separation of the skin tripe in two parts, one side said flesh side also called crust, the other side said flower side called leather flower.
  • Step 1 groups these operations under the terms quenching, skinning and slitting. The quenching operation therefore consists in washing the skin.
  • this skin is subjected to a skinning operation which consists in carrying out, simultaneously or after the depilation, an alkaline treatment, for example, so as to cause a controlled hydrolysis of the skin in order to make the skin more receptive to subsequent operations, in particular after its separation during the slitting operation, using a lime milk H) oily.
  • a skinning operation which consists in carrying out, simultaneously or after the depilation, an alkaline treatment, for example, so as to cause a controlled hydrolysis of the skin in order to make the skin more receptive to subsequent operations, in particular after its separation during the slitting operation, using a lime milk H) oily.
  • step 2 The grain leather is first subjected to a deliming operation in step 2.
  • Deliming consists in fact of an action
  • the grain leather is subjected to a step 3 which consists of a pre-tanning of the loose grain leather.
  • This pre-tanning step is carried out by means of a mixture based on aldehydes, acrylic resin and / or synthetic or organic tannins further comprising an inorganic product based on silica in colloidal suspension. 5
  • a colloidal suspension of amorphous silica containing 30% SiO 2 stabilized in an alkaline medium is used in the pH range from 10 to 10.5.
  • the silica in colloidal suspension is provided in a proportion of 2 to 4% by weight relative to the resold weight and the diameter of the silica particles in colloidal suspension is less than or equal to 10.10 ⁇ 6 mm so as to allow better penetration of the leather. _t
  • step 4 the leathers thus obtained are wrung out and, in the subsequent step, in this case step 5, a new slitting of the grain leather known as white slitting is carried out.
  • a step 6 the leathers thus obtained are sorted and, in a step 7, a declutching operation is carried out.
  • the thickness of the leather is equalized so as to make this thickness uniform. Generally, this equalization is done by eliminating fine chips on the flesh side.
  • the shifting machine is modified by reducing the speed of rotation of the blades.
  • the speed of rotation of the blades is reduced by 40 to 60%, preferably 50% compared to the speed adopted in conventional tanning processes, in particular those using chromium.
  • the actual tanning operation of the grain leather is carried out.
  • this tanning operation uses a chemical solution based on aldehydes, synthetic tannins and / or preferably acrylic resins.
  • step 9 the leather is neutralized by means of an appropriate chemical solution then again, in the next step numbered 10, a retanning operation is carried out using a solution of composition similar to that of step 8.
  • a solution of products based on sodium silico-aluminates is introduced as an inerting agent.
  • the addition of the inerting agent is 3 to 5% of the derailed weight and said solution comprises 73 to 78% of Si0 2 .
  • This solution comprising inerting agents contributes to improving the mechanical characteristics of the leather and, in particular, allows the leather to better withstand the stresses imposed during the injection of a sole onto a upper made from this leather.
  • steps 11 and 12 being operations of finishing the leather.
  • the crusts can be treated in a similar way to grain leather as it appears on the diagram. Indeed, the split crusts can, if they undergo a pickling operation, be subsequently treated by means of operations in accordance with steps 3 to 12 of the process applied to grain leather. Again, in step 7 consisting of the declutching step, the waste obtained can be recovered. 0
  • the process of the invention make it possible to increase the shrinkage temperature of the treated leathers but, moreover, it makes it possible to improve the properties of the treated leather while promoting the production of waste 5 usable in other fields .

Landscapes

  • 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)
  • Meat, Egg Or Seafood Products (AREA)
  • Laminated Bodies (AREA)
  • Coloring (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
EP97943935A 1996-10-03 1997-10-03 Gerbprozess Expired - Lifetime EP0929698B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9612050 1996-10-03
FR9612050A FR2754274B1 (fr) 1996-10-03 1996-10-03 Procede de tannage de peaux
PCT/FR1997/001754 WO1998014620A1 (fr) 1996-10-03 1997-10-03 Procede de tannage de peaux

Publications (2)

Publication Number Publication Date
EP0929698A1 true EP0929698A1 (de) 1999-07-21
EP0929698B1 EP0929698B1 (de) 2001-01-31

Family

ID=9496317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97943935A Expired - Lifetime EP0929698B1 (de) 1996-10-03 1997-10-03 Gerbprozess

Country Status (8)

Country Link
EP (1) EP0929698B1 (de)
JP (1) JP3834064B2 (de)
AT (1) ATE199026T1 (de)
AU (1) AU4559697A (de)
DE (1) DE69704026T2 (de)
ES (1) ES2154473T3 (de)
FR (1) FR2754274B1 (de)
WO (1) WO1998014620A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4789552B2 (ja) * 2005-09-07 2011-10-12 トヨタ自動車株式会社 皮革材料の製造方法
JP5172228B2 (ja) 2007-06-28 2013-03-27 ミドリホクヨー株式会社 革
DE102023100288B4 (de) 2023-01-09 2025-12-31 CARBBIND solutions GmbH Bindemittel, Verfahren zu dessen Herstellung sowie Verwendung des Bindemittels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822072A1 (de) * 1978-05-20 1979-11-29 Henkel Kgaa Verwendung wasserunloeslicher aluminiumsilikate bei der lederherstellung
DE2831846A1 (de) * 1978-07-20 1980-02-07 Henkel Kgaa Verwendung wasserunloeslicher aluminiumsilikate bei der lederherstellung
FR2686099B1 (fr) * 1992-01-14 1994-11-25 Hoechst France Application de sols de silice a l'obtention d'une peau dite blanc pickle stabilise ou blanc stabilise.
FR2711145B1 (fr) * 1993-10-12 1996-02-02 Jallatte Procédé de tannage de peaux.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9814620A1 *

Also Published As

Publication number Publication date
EP0929698B1 (de) 2001-01-31
ES2154473T3 (es) 2001-04-01
JP3834064B2 (ja) 2006-10-18
DE69704026T2 (de) 2001-08-16
JP2001503086A (ja) 2001-03-06
DE69704026D1 (de) 2001-03-08
FR2754274B1 (fr) 1999-12-31
WO1998014620A1 (fr) 1998-04-09
ATE199026T1 (de) 2001-02-15
AU4559697A (en) 1998-04-24
FR2754274A1 (fr) 1998-04-10

Similar Documents

Publication Publication Date Title
FR2543974A1 (fr) Procede pour le degraissage au mouille de peaux par attaque enzymatique
EP0929698B1 (de) Gerbprozess
FR2680521A1 (fr) Procede de tannage, de retannage ou de retraitement mineral des cuirs.
FR2501717A1 (fr) Procede de protection de l'environnement pour le chaulage de peaux brutes
EP0563139B1 (de) Verfahren zur behandlung von häuten oder leder durch einsatz von methansulfonationen.
NL2024293B1 (en) Process for dehairing and liming of hides, skins or pelts
CA2476649A1 (fr) Utilisation de polymeres acryliques greffes dans le domaine des substrats a base de collagene. substrats, peaux et cuirs ainsi obtenus
EP0551785B1 (de) Anwendung von Kieselsäuresolen zur Erhaltung eines Hauts unter der Bezeichnung "blanc picklé stabilisé" oder "blanc stabilisé"
FR1464309A (fr) Procédé de tannage rapide de cuirs mi-lourds et lourds
FR2701716A1 (fr) Procédé de retannage du cuir.
KR960004528B1 (ko) 방수 가죽의 제조방법
FR2711145A1 (fr) Procédé de tannage de peaux.
FR2534597A1 (fr) Procede de nourriture de cuirs et peaux
RU2195499C1 (ru) Способ обработки меховой овчины
RU2198933C1 (ru) Способ обработки голья
US1036267A (en) Process of making firm, almost entirely waterproof, non-slipping leather.
BE545791A (de)
CH284086A (fr) Procédé de tannage des peaux.
BE554781A (de)
BE453228A (fr) Procédé de picklage des peaux brutes et pelleteries
BE512400A (de)
CH436554A (fr) Procédé d'imperméabilisation du cuir
CH361357A (fr) Procédé de traitement du cuir
BE432969A (de)
BE888759A (fr) Procede de fabrication d'un tannin au titane et son utilisation pour le tannage des peaux

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990419

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR GB IE IT LI

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20000704

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: JALLATTE S.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IE IT LI

REF Corresponds to:

Ref document number: 199026

Country of ref document: AT

Date of ref document: 20010215

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: FRENCH

REF Corresponds to:

Ref document number: 69704026

Country of ref document: DE

Date of ref document: 20010308

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2154473

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20010330

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: JALLATTE S.A.

Free format text: JALLATTE S.A.#RUE DU FORT#30170 SAINT-HIPPOLYTE-DU-FORT (FR) -TRANSFER TO- JALLATTE S.A.#RUE DU FORT#30170 SAINT-HIPPOLYTE-DU-FORT (FR)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20081028

Year of fee payment: 12

Ref country code: DE

Payment date: 20081030

Year of fee payment: 12

Ref country code: CH

Payment date: 20081103

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20081107

Year of fee payment: 12

Ref country code: AT

Payment date: 20081023

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20081023

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20081028

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20081029

Year of fee payment: 12

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091102

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091003

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091031

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091005

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091003

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091003

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110324

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091004