EP1124994B1 - Auxiliaire pour le pelanage et le relachement du poil de peaux d'animaux - Google Patents

Auxiliaire pour le pelanage et le relachement du poil de peaux d'animaux Download PDF

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Publication number
EP1124994B1
EP1124994B1 EP00940306A EP00940306A EP1124994B1 EP 1124994 B1 EP1124994 B1 EP 1124994B1 EP 00940306 A EP00940306 A EP 00940306A EP 00940306 A EP00940306 A EP 00940306A EP 1124994 B1 EP1124994 B1 EP 1124994B1
Authority
EP
European Patent Office
Prior art keywords
liming
hair
solution
weight
adjuvant according
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.)
Revoked
Application number
EP00940306A
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German (de)
English (en)
Other versions
EP1124994A1 (fr
Inventor
Thomas Feigel
Gertrud Wick
Peter Wohlmuth
Martin Heise
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.)
Trumpler & Co Kg Chemische Fabrik GmbH
Original Assignee
Trumpler GmbH and Co Chemische Fabrik
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
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Application filed by Trumpler GmbH and Co Chemische Fabrik filed Critical Trumpler GmbH and Co Chemische Fabrik
Publication of EP1124994A1 publication Critical patent/EP1124994A1/fr
Application granted granted Critical
Publication of EP1124994B1 publication Critical patent/EP1124994B1/fr
Anticipated expiration legal-status Critical
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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
    • C14C1/06—Facilitating unhairing, e.g. by painting, by liming

Definitions

  • the invention relates to an aid for skin disruption and the loosening of hair, which in the case of liming designated manufacture of the epidermis and subcutaneous connective tissue liberated, untanned dermis, the so-called Nakedness, is used.
  • the entire process of leather production consists of three main operations, namely the water workshop, the Tanning and dressing.
  • the salted and dried Skin material first by soaking in the hydrated Condition of the green skin set back. Then one follows Treatment with alkaline hair loosening baths for the purpose of Hair loosening and hair digestion. Hair loosening and Skin digestion is generally done in one Process step carried out, the liming. Furthermore are fermentative loosening processes in use and processes, in which the hair is exposed to keratolizing agents be completely destroyed. Swelling and alkaline reaction are finally eliminated by neutralization. In In this condition the skin is called "nakedness".
  • the measures to remove the hair, the epidermis and the Hair roots depend on whether the hair is chemical may be destroyed or should be preserved. Are the Hair of lesser value then becomes chemical depilatory applied directly to the hair side of the skins, whereby the hair shafts destroyed or at least more or less to be attacked. This is usually done using a sulfide Lime suspension applied. It is industrially common this treatment (liming) in large vessels while moving perform. Except for the hair and hair roots, it works Lime suspension also on the leather-forming skin substance. This change in the substance of the skin, the cremation, is for the Tanning very essential. To achieve an optimal liming effect receive, one is therefore often ready to preserve hair no consideration, even in cases where the hair is still would be good to use.
  • the skin substance is primarily through alkaline swelling disrupted, i.e. in their structure loosened up, leading to greater porosity of the leather and leads to particular softness or speed, e.g. For Glove leather is desired. It also includes some accompanying proteins of the fibrillary connective tissue. Duration and The intensity of the cremation is only empirical determine because the types of skin vary greatly on liming react. Due to excessive swelling, a "loose” or “running” scars develop, i.e. the top layer of skin, the hair root pores, emptied sweat glands and a branched Contains blood vessel system, dissolves when the Leather from the underlying, compact fiber layer and wrinkles.
  • hydrolytically active bases are, for example, calcium hydroxide, hydrated lime [with 80 to 96% Ca (OH) 2 ] and sodium hydroxide solution.
  • Sodium sulfide, sodium hydrogen sulfide and calcium hydrogen sulfide have a reductive effect. The action of these substances also destroys the epidermis, so that this layer together with the hair can be easily lifted off with a blunt hair knife or by machine.
  • sodium sulfide has a reducing effect on the sulfur-containing amino acids in keratin; then the quicklime can attack more easily and cause hydrolytic cleavage of the preceratins in the basal cell layer of the epidermis.
  • DE 29 11 401 describes a method for cremation of animal skins and Describe skinning in which a liming solution containing next to others Components a protective colloid, for example a carbohydrate such as dextrin or The like., Thioglycolic acid and mercaptoethanol is used. You can also these liming solutions contain non-ionic wetting agents.
  • molasses used in the aid according to the invention.
  • the use of molasses in the Leatherworking is known per se. Molasses can be used in all operations be added to the water workshop. The addition of is particularly valuable Molasses when liming, as they increase the solubility of the hydrated lime in the liquor significantly improved and a better skin disruption is achieved.
  • Molasses as a particularly inexpensive polysaccharide solution in general deserves preference, but other solutions can be used, which contain water soluble carbohydrates, e.g. Sugar solutions with one Content of about 10 to 70 wt .-% sugar.
  • Another important component of the aid according to the invention is a Mercaptocarboxylic acid or one of its salts, preferably the Thioglycolic.
  • the use of this Mercaptocarboxylic acid for Keratolytica is already known. She is mainly used in hair treatment, but also as a depilatory used. Thioglycolates are already in the tannery have been used for depilation of fur, but have been used for this application has no particularly great technical importance obtained.
  • mercapto alcohol especially mercaptoethanol in the form of its sodium alcoholate. It is characterized by a pronounced hair loosening Effect out.
  • the aid according to the invention leads to a clear one Quality improvement of the leather obtained with it.
  • the specialist notices that when using the Aid according to the invention can be obtained with lighter pelts and thus an improvement in the range of leather qualities is achievable.
  • the aid mentioned particularly smooth bare and thus the Loss of area in the production of leather from a skin always occurs, is kept very low. It also causes the aid according to the invention has a very high level of lime solubility, the prerequisite for particularly good skin digestion is.
  • the aid according to the invention brings high environmental impact.
  • the tool can namely the amount to be used in the liming inorganic sulfides or hydrosulfides significantly reduced their removal from the wastewater is considerable technical problem.
  • the Ashes swelling due to the invention Combination aids can be regulated more easily than with exclusive addition of sulfides or hydrogen sulfides.
  • the use of primary aliphatic Amines and other organic nitrogen compounds to be dispensed with, which is common in the liming so far can be used to loosen hair. These amines and nitrogen compounds not only lead to odor nuisance, but also need to be removed during wastewater treatment become, which means a further technical effort.
  • the aid according to the invention can further be added of hydrotropic substances can be improved.
  • hydrotropic substances can be improved. This includes one understands substances whose addition the water solubility another, poorly soluble substance improved. For this count organic nitrogen compounds like urea, Thiourea, formamide, acetamide, N-methylacetamide and Guanidine hydrochloride. But also organic sulfonic acids and Carboxylic acids and their salts, e.g. Cumene sulfonate, and even Calcium chloride has hydrotropic effects. Hydrotropica effect for proteins such as in the collagen structure of the skin, one Splitting of the hydrogen bonds between the peptide chains and thus swelling, which prevents access to the keratinolytic Active ingredients, but also those used for fat dissolution anionic or nonionic surfactants relieved.
  • the aid according to the invention is used in the process for Digestion of the skin and for loosening the hair of animal skins in addition to the commonly used alkalis, inorganic Sulfides or hydrosulfides and anionic or nonionic Surfactants used in an aqueous solution, whereby it is usually used in an amount of 0.1 to 5% by weight becomes.
  • the process is generally at a pH above 11, preferably at a pH between 12 and 12.5 and at temperatures between 25 and 35 ° C over a period of 15 to 20 hours with temporary movement of the animal skins in the drums used for liming.
  • Example 1 Hair-destroying treatment of cowhides in soft and liming
  • the skin is then fleshed, split and subjected to normal processing.
  • Example 2 Hair-preserving treatment of cowhides in switches and limbers
  • the skin is then fleshed, split and subjected to normal processing subjected.

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)
  • Cosmetics (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Claims (10)

  1. Auxiliaire pour le pelanage et le relâchement du poil de peaux d'animaux, caractérisé en ce qu'il contient en solution aqueuse
    10 à 50 % en poids d'une solution de polysaccharide,
    5 à 25 % en poids d'un acide mercaptocarboxylique ou un de ses sels et
    1 à 10 % en poids d'un mercaptoalcool ou un de ses sels alcalins.
  2. Auxiliaire selon la revendication 1, caractérisé en ce qu'on utilise comme solution de polysaccharide de la mélasse ou une solution contenant 10 à 70 % en poids de carbohydrates solubles dans l'eau.
  3. Auxiliaire selon les revendications 1 et 2, caractérisé en ce qu'on utilise comme acide mercaptocarboxylique de l'acide thioglycolique.
  4. Auxiliaire selon les revendications 1 à 3, caractérisé en ce qu'on utilise comme mercaptoalcool du mercaptoéthanol.
  5. Auxiliaire selon les revendications 1 à 4, caractérisé en ce qu'il contient en outre une substance hydrotrope.
  6. Auxiliaire selon la revendication 5, caractérisé en ce qu'il contient comme substance hydrotrope de l'urée, de la thiourée, de la formamide, de l'acétamide, de la N-méthylacétamide, de l'hydrochlorure de guanidine, du sulfonate de cumène ou du chlorure de calcium.
  7. Auxiliaire selon les revendications 1 à 6, caractérisé en ce qu'il contient en outre un tensioactif anionique ou non ionique.
  8. Procédé de pelanage et de relâchement du poil de peaux d'animaux par pelanage au moyen d'une solution contentant des alcalins, des sulfures minéraux ou des sulfures d'hydrogène et des tensioactifs anioniques ou non ioniques, caractérisé en ce qu'un auxiliaire selon les revendications 1 à 7 est ajouté en outre à la solution.
  9. Procédé selon la revendication 8, caractérisé en ce que l'auxiliaire est ajouté à la solution utilisée pour le pelanage dans une quantité comprise entre 0,1 et 5,0 % en poids.
  10. Procédé selon les revendications 8 et 9, caractérisé en ce qu'il est réalisé à un pH supérieur à 11, de préférence à un pH compris entre 12 et 12,5, à une température comprise entre 25 et 35 °C durant 15 à 20 heures en agitant de temps en temps les peaux d'animaux dans le tonneau à fouler utilisé pour le pelanage.
EP00940306A 1999-07-20 2000-06-03 Auxiliaire pour le pelanage et le relachement du poil de peaux d'animaux Revoked EP1124994B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19933968 1999-07-20
DE19933968A DE19933968A1 (de) 1999-07-20 1999-07-20 Hilfsmittel für den Hautaufschluß und die Haarlockerung von Tierhäuten
PCT/EP2000/005076 WO2001006020A1 (fr) 1999-07-20 2000-06-03 Auxiliaire pour le pelanage et le relachement du poil de peaux d'animaux

Publications (2)

Publication Number Publication Date
EP1124994A1 EP1124994A1 (fr) 2001-08-22
EP1124994B1 true EP1124994B1 (fr) 2004-03-17

Family

ID=7915401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00940306A Revoked EP1124994B1 (fr) 1999-07-20 2000-06-03 Auxiliaire pour le pelanage et le relachement du poil de peaux d'animaux

Country Status (11)

Country Link
US (1) US6689172B1 (fr)
EP (1) EP1124994B1 (fr)
KR (1) KR20010079687A (fr)
CN (1) CN1242073C (fr)
AT (1) ATE262043T1 (fr)
AU (1) AU5528400A (fr)
BR (1) BR0006176A (fr)
DE (2) DE19933968A1 (fr)
ES (1) ES2215677T3 (fr)
WO (1) WO2001006020A1 (fr)
ZA (1) ZA200007294B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221152B4 (de) * 2002-05-13 2008-10-30 Schill + Seilacher Ag Verfahren zur Herstellung sauberer Blößen in der Wasserwerkstatt
AR039980A1 (es) * 2002-05-22 2005-03-09 Basf Ag Procedimiento para eliminar sustancias corneas de pieles o pellejos
US7162289B2 (en) * 2002-09-27 2007-01-09 Medtronic Minimed, Inc. Method and apparatus for enhancing the integrity of an implantable sensor device
CN102071268A (zh) * 2011-01-12 2011-05-25 宁波工程学院 一种生皮的干法保毛脱毛处理方法
CN104711380B (zh) * 2015-04-07 2016-08-17 无极县星皓皮革制品有限公司 一种酶脱毛助剂及其制备方法
CN105132600B (zh) * 2015-08-21 2017-05-31 四川大学 调控蛋白酶对动物皮内胶原蛋白和弹性蛋白选择性作用的方法
CN110358874A (zh) * 2018-04-09 2019-10-22 徐州鸿丰高分子材料有限公司 保毛脱毛剂制备及其保毛脱毛方法
DE102018110284A1 (de) 2018-04-27 2019-10-31 Werner & Mertz Gmbh Wässrige Zusammensetzung zum Auflösen von Haaren sowie entsprechende Verwendungen und Verfahren
US11700860B2 (en) 2018-09-27 2023-07-18 The United States Of America, As Represented By The Secretary Of Agriculture Method to clean and decontaminate animal carcasses using alkaline thioglycolate-containing compound

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
YU36755B (en) * 1971-11-17 1984-08-31 Basf Ag Process for the elimination of hairs from hides and furs
DE2911401A1 (de) * 1979-03-23 1980-10-02 Roehm Gmbh Verfahren zum aeschern von bloessen aus tierischen haeuten und fellen
DE2917376C2 (de) 1979-04-28 1987-03-26 Röhm GmbH, 6100 Darmstadt Enzymatisches Verfahren zur Haargewinnung und zum gleichzeitigen Hautaufschluß
US4631064A (en) * 1982-06-01 1986-12-23 The Proctor & Gamble Company Depilatory compositions
DE29503135U1 (de) * 1995-02-24 1995-05-24 Röhm GmbH, 64293 Darmstadt Mehrfunktionelle Lederbearbeitungsmittel

Also Published As

Publication number Publication date
KR20010079687A (ko) 2001-08-22
ATE262043T1 (de) 2004-04-15
DE19933968A1 (de) 2001-01-25
CN1304455A (zh) 2001-07-18
CN1242073C (zh) 2006-02-15
BR0006176A (pt) 2001-04-17
AU5528400A (en) 2001-02-05
ZA200007294B (en) 2001-10-11
ES2215677T3 (es) 2004-10-16
WO2001006020A1 (fr) 2001-01-25
US6689172B1 (en) 2004-02-10
EP1124994A1 (fr) 2001-08-22
DE50005677D1 (de) 2004-04-22

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