EP0847453A1 - Procede de traitement des peaux - Google Patents

Procede de traitement des peaux

Info

Publication number
EP0847453A1
EP0847453A1 EP96929284A EP96929284A EP0847453A1 EP 0847453 A1 EP0847453 A1 EP 0847453A1 EP 96929284 A EP96929284 A EP 96929284A EP 96929284 A EP96929284 A EP 96929284A EP 0847453 A1 EP0847453 A1 EP 0847453A1
Authority
EP
European Patent Office
Prior art keywords
hides
weight
treatment
mixture
composition
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
EP96929284A
Other languages
German (de)
English (en)
Other versions
EP0847453B1 (fr
Inventor
Giovanni Tempesti
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.)
Tempesti SpA
Original Assignee
Tempesti SpA
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 Tempesti SpA filed Critical Tempesti SpA
Publication of EP0847453A1 publication Critical patent/EP0847453A1/fr
Application granted granted Critical
Publication of EP0847453B1 publication Critical patent/EP0847453B1/fr
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
    • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
    • C14C9/02—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring

Definitions

  • the present invention relates to the treatment of hides for the production of shoes, handbags, belts and the like.
  • the invention relates to a process for the treatment of hides comprising their vegetable tanning, and more precisely for the so-called stuffing stage; the invention also relates to compositions of fatty substances that can be used for the said stuffing stage.
  • salts generally sodium chloride
  • acids such as formic, hydrochloric or sulphuric acid
  • tanning proper effected by treating the hides in drums with concentrated extracts of various vegetable materials rich in tannins, for example the bark of oak, chestnut, holm oak, birch, wood of quebracho, cherry plums, fruit of the algoravilla, etc., also using, if necessary, synthetic tannins such as tanning auxiliaries;
  • the problem at the root of the present invention is that of making available a process for the treatment of hides comprising vegetable tanning thereof, which process makes it possible to obtain a hide that has characteristics of softness to the touch superior to those obtained hitherto with known processes.
  • the aforementioned mixture of fatty substances preferably contains, as percentages by weight relative to the total weight of the mixture, 55-65% of tallow, 12-17% of marine animal oil and 22-27% of oxidized marine animal oil.
  • the aforementioned compression is preferably carried out at a pressure of 380-420 atmospheres, using a plate press.
  • drum used in the treatment described above it is preferable for the drum used in the treatment described above to be rotated at a speed of 16-18 rev/min.
  • Drum treatment of the hides with the mixture of fatty substances generally takes from 1.5 to 4 hours.
  • the aforementioned mixture of fatty substances prefferably contain from 0.3 to 1.0% of a fungicide.
  • the hide obtained by the process according to the invention can then be sent to the usual stages of smoothing and drying and to optional stages of finishing, polishing, stamping, etc., before being used for the manufacture of leather goods, shoe uppers, etc.
  • the hide produced using the process of the invention is characterized, relative to all hides produced hitherto using known processes of the art, in that it has a very special "handle" that is immediately recognizable by any person skilled in the art. That is, the hide is extremely and pleasantly soft to the touch, though without displaying excessive yielding, and on the contrary exhibiting excellent properties of resistance to mechanical deformation.
  • the special handle of the hide obtained with the process according to the invention is due both to the particular way in which the hide is prepared during the stuffing stage and to the specific composition of fatty substances used for that stage.
  • the stage of compression to which the hide is subjected has the purpose of adjusting its moisture content to an ideal value for penetration of the fatty substances during the subsequent stage of stuffing.
  • An excessively high moisture content would not permit sufficient and uniform penetration of the fatty substances, producing a hide with a handle that is too "greasy” and therefore too yielding.
  • composition of the mixture of fatty substances used for the stuffing stage is critical for achieving an optimum result in terms of handle of the final hide.
  • An excessive deviation from the ranges stated for the various components can result in hides that are too dry or conversely too soft and characterized by a greasy handle.
  • EXAMPLE 1 750 "shoulders" (i.e. those portions of hide corresponding to the neck) of hides of adult cow each weighing approx. 5.5-5.8 kg were subjected to the usual stages of the conventional process of vegetable tanning described above.
  • the hides were then again divided into three lots of 250 hides each and each lot was placed in a drum with a diameter of 3 metres and a volume of approx. 11 m* .
  • composition shown above was prepared by adding the tallow, made fluid by heating at 60°C, to the mixture of the other components and allowing the whole to cool to room temperature.
  • the hides were, kept in contact with the aforementioned mixture for about 3.5 hours in the drum, rotating at a speed of 16 rev/min, until the temperature of the hides reached a value of 34°C.
  • the final product obtained from the drying stage had a fatty substance content equal to 21% by weight.
  • EXAMPLE 2 750 hides treated as in the preceding Example and each with an average weight of about 3.75 kg, a thickness of 2.3 mm and a pH of around 3.5 were put on top of one another to form three stacks of 250 hides each; each stack was placed on a plate press and compressed at a pressure of 420 atmospheres for 4 hours.
  • the hides were then again divided into three lots of 250 hides each and each lot was placed in a drum with a diameter of 3 metres and a volume of approx. 11 3 .
  • the hides were kept in contact with the aforementioned mixture for about 4 hours in the drum rotating at a speed of 18 rev/min, until the temperature of the hides reached a value of 35°C.
  • the final product obtained from the drying stage had a fatty substance content equal to 19% by weight.
  • the hides were then again divided into three lots of 250 hides each and each lot was placed in a drum with a diameter of 3 metres and a volume of approx. 11 m 3 .
  • the hides were kept in contact with the aforementioned mixture for about 3 hours in the drum rotating at a speed of 18 rev/min, until the temperature of the hides reached a value of 34°C.
  • the final product obtained from the drying stage had a fatty substance content equal to 22% by weight.
  • the hides prepared according to the above examples all possessed handle characterized by extreme softness yet accompanied by characteristics of excellent elasticity and resistance to mechanical deformation.
  • composition of fatty substances used in the process according to the invention offers the advantage that it i ⁇ absolutely stable and can be stored perfectly at room temperature for long periods of time. It is not therefore necessary for the composition to be prepared at the very moment of application of the process according to the invention, on the contrary it can be prepared in great quantities, to meet the needs of production for several weeks.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Glass Compositions (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

Ce procédé de traitement des peaux par tannage végétal consiste à soumettre des peaux parées et teintes à une compression d'une pression d'au moins 380 atmosphères pendant environ 4 à 5 heures, à les mettre en suif dans un tanneau à témpérature ambiante avec 15 à 20 % en poids d'un mélange de substances grasses à base de graisses et huiles animales comprenant 1,2 à 2,5 % en poids d'une huile de poisson sulfonée, puis à poursuivre ce traitement jusqu'à ce que le température des peaux atteigne 24 à 36 °C. On décrit aussi une composition de mise en suif des peaux parées et teintes. Les peaux obtenues par le procédé et la composition décrits se caractérisent par une grande douceur au toucher accompagnée d'une excellent résistance aux contraintes et déformations mécaniques.
EP96929284A 1995-08-30 1996-08-20 Procede de traitement des peaux Expired - Lifetime EP0847453B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI951830 1995-08-30
ITMI951830A IT1260161B (it) 1995-08-30 1995-08-30 Processo per la lavorazione di pelli
PCT/EP1996/003656 WO1997008346A1 (fr) 1995-08-30 1996-08-20 Procede de traitement des peaux

Publications (2)

Publication Number Publication Date
EP0847453A1 true EP0847453A1 (fr) 1998-06-17
EP0847453B1 EP0847453B1 (fr) 2001-07-11

Family

ID=11372201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96929284A Expired - Lifetime EP0847453B1 (fr) 1995-08-30 1996-08-20 Procede de traitement des peaux

Country Status (6)

Country Link
EP (1) EP0847453B1 (fr)
AT (1) ATE203059T1 (fr)
AU (1) AU6874996A (fr)
DE (1) DE69613844D1 (fr)
IT (1) IT1260161B (fr)
WO (1) WO1997008346A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20010060A1 (it) * 2001-03-13 2002-09-13 Ge Ma Ta Spa Procedimento di tintura ingrasso e fissaggio delle pelli
US6707037B2 (en) * 2001-05-25 2004-03-16 Analytica Of Branford, Inc. Atmospheric and vacuum pressure MALDI ion source

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB773825A (en) * 1954-02-18 1957-05-01 Nopco Chem Co Fat-liquoring compositions
US4285688A (en) * 1979-03-28 1981-08-25 Leather Life, Inc. Saddle oil
SU1493679A1 (ru) * 1987-01-12 1989-07-15 Опытное конструкторско-технологическое бюро по интенсификации тепломассообменных процессов Института технической теплофизики АН УССР Способ выработки м гких кож

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9708346A1 *

Also Published As

Publication number Publication date
ITMI951830A1 (it) 1997-03-02
ATE203059T1 (de) 2001-07-15
DE69613844D1 (de) 2001-08-16
AU6874996A (en) 1997-03-19
ITMI951830A0 (it) 1995-08-30
EP0847453B1 (fr) 2001-07-11
IT1260161B (it) 1996-04-02
WO1997008346A1 (fr) 1997-03-06

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