EP1124994B1 - Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäuten - Google Patents
Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäuten Download PDFInfo
- 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
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
- 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)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Description
- 10 bis 50 Gew.-%
- einer Polysaccharidlösung,
- 5 bis 25 Gew. -%
- einer Mercaptocarbonsäure oder eines ihrer Salze und
- 1 bis 10 Gew.-%
- eines Mercaptoalkohols oder eines seiner Alkalisalze enthält.
Material: | gesalzene Rindshäute | |||
Arbeitsgefäß: | Faß | |||
%-Angaben bezogen auf Salzgewicht | ||||
Schmutzweiche: | 200 % | Wasser | 30°C | |
0,1 % | Bakerizid | |||
0,2 % | anionisches Tensid | 90 Min. bewegen | ||
Flotte ablassen | ||||
Hauptweiche: | 150 % | Wasser | 28°C | |
0,3 % | Bakterienprotease | |||
0,2 % | anionisches Tensid | |||
0,1 % | Bakerizid | |||
0,3 % | Natronlauge, 45% 1:3 pH 9,2-9,5 Temp. 27-29°C | 270 Min. bewegen | ||
Flotte ablassen | ||||
Äscher: | 70 % | Wasser | 28°C | |
0,8 % | Polysaccharidlösung Na-Salze von Thioglykolsäure und Mercaptoethanol | |||
1,3 % | Natriumsulfid, 60% | |||
1,0 % | Kalkhydrat | |||
0,1 % | anionisches Tensid | 30 Min.bewegen, 15 Min.ruhen | ||
+ | 2,0 % | Kalkhydrat | ||
0,3 % | Natriumsulfid, 60% | 30 Min.bewegen, 30 Min.ruhen | ||
+ | 80 % | Wasser | 28°C | |
0,4 % | Natronlauge, 45% 1:3 | 60 Min.bewegen,30 Min.ruhen dann im Wechsel: 60 Min.ruhen, 5 Min. bewegen Gesamtdauer:16-18 Stunden | ||
pH 12,2-12,5 | ||||
Temp. 26-28°C | ||||
Flotte ablassen | ||||
Waschen | 200 % | Wasser | 26°C | 15 Min. bewegen |
Flotte ablassen | ||||
Waschen | 200 % Wasser | 26°C | ||
0,3 % Polyphosphat | 10 Min. bewegen | |||
Flotte ablassen |
Material: | gesalzene Rindshäute | |||
Arbeitsgefäß: | Faß | |||
%-Angaben bezogen auf Salzgewicht | ||||
Schmutzweiche: | 200 % | Wasser | 30°C | |
0,1 % | Bakterizid | |||
0,2 % | anionisches Tensid | 90 Min. bewegen | ||
Flotte ablassen | ||||
Hauptweiche: | 150 % | Wasser | 28°C | |
0,3 % | Bakterienprotease | |||
0,2 % | anionisches Tensid | |||
0,1 % | Bakterizid | |||
0,3 % | Natronlauge, 45% | 1:3 | 270 Min. bewegen | |
pH 9,2-9,5 | ||||
Temp. 27-29°C | ||||
Flotte ablassen | ||||
Äscher: | 70 % | Wasser | 28°C | |
0,8 % | polysaccharidlösung Na-salze von Thioglykolsäure und Mercaptoethanol | |||
+ | 1,0 % | Kalkhydrat | ||
0,1 % | anionisches Tensid | 30 Min. bewegen, 15 Min. ruhen 15 Min. bewegen | ||
+ | 1,1 % | Natriumsulfhydrat, 72% | 60 Min. bewegen, nach 30 Min. Haare separieren (Haarfilter) | |
+ | 80 % | Wasser | 28°C | |
2,0 % | Kalkhydrat | |||
0,1 % | Gleitmittel | |||
0,5 % | Natronlauge, 45% 1:3 | 30 Min. bewegen, 30 Min. ruhen dann im Wechsel: | ||
60 Min. ruhen, 5 Min. bewegen Gesamtdauer: 16-18 Stunden | ||||
pH 12,2-12,5 | ||||
Temp. 26-28°C | ||||
Flotte ablassen | ||||
Waschen | 200 % | Wasser | 26°C | 15 Min. bewegen |
Flotte ablassen | ||||
Waschen | 200 % | Wasser | 26°C | |
0,3 % | Polyphosphat | 20 Min. bewegen |
Claims (10)
- Hilfsmittel für den Hautaufschluss und die Haarlockerung von Tierhäuten, dadurch gekennzeichnet, dass es in wässriger Lösung
10 bis 50 Gew.-% einer Polysaccharidlösung, 5 bis 25 Gew.-% einer Mercaptocarbonsäure oder eines ihrer Salze und 1 bis 10 Gew.-% eines Mercaptoalkohols oder eines seiner Alkalisalze enthält. - Hilfsmittel nach Anspruch 1, dadurch gekennzeichnet, dass als Polysaccharidlösung Melasse oder eine 10 bis 70 Gew.-% wasserlösliche Kohlenhydrate enthaltende Lösung eingesetzt wird.
- Hilfsmittel nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass als Mercaptocarbonsäure Thioglykolsäure eingesetzt wird.
- Hilfsmittel nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass als Mercaptoalkohol Mercaptoethanol eingesetzt wird.
- Hilfsmittel nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass es zusätzlich eine hydrotrope Substanz enthält.
- Hilfsmittel nach Anspruch 5, dadurch gekennzeichnet, dass es als hydrotrope Substanz Harnstoff, Thioharnstoff, Formamid, Acetamid, N-Methylacetamid, Guanidinhydrochlorid, Cumolsulfonat oder Calciumchlorid enthält.
- Hilfsmittel nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, dass es zusätzlich ein anionisches oder nichtionisches Tensid enthält.
- Verfahren zum Hautaufschluss und zur Haarlockerung von Tierhäuten durch Äschern mittels einer Alkalien, anorganische Sulfide oder Hydrogensulfide und anionische oder nichtionische Tenside enthaltenden Lösung, dadurch gekennzeichnet, dass der Lösung zusätzlich ein Hilfsmittel gemäß den Ansprüchen 1 bis 7 zugesetzt wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass der zum Äschern verwendeten Lösung das Hilfsmittel in einer Menge von 0,1 bis 5,0 Gew.-% zugesetzt wird.
- Verfahren nach den Ansprüchen 8 und 9, dadurch gekennzeichnet, dass es bei einem pH-Wert über 11, vorzugsweise bei einem pH-Wert zwischen 12 und 12,5 und bei Temperaturen zwischen 25 und 35°C über einen Zeitraum von 15 bis 20 Stunden unter zeitweiser Bewegung der Tierhäute in den zum Äschern eingesetzten Walkfässern durchgeführt wird.
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 (de) | 1999-07-20 | 2000-06-03 | Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäuten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1124994A1 EP1124994A1 (de) | 2001-08-22 |
EP1124994B1 true EP1124994B1 (de) | 2004-03-17 |
Family
ID=7915401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00940306A Revoked EP1124994B1 (de) | 1999-07-20 | 2000-06-03 | Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäuten |
Country Status (11)
Country | Link |
---|---|
US (1) | US6689172B1 (de) |
EP (1) | EP1124994B1 (de) |
KR (1) | KR20010079687A (de) |
CN (1) | CN1242073C (de) |
AT (1) | ATE262043T1 (de) |
AU (1) | AU5528400A (de) |
BR (1) | BR0006176A (de) |
DE (2) | DE19933968A1 (de) |
ES (1) | ES2215677T3 (de) |
WO (1) | WO2001006020A1 (de) |
ZA (1) | ZA200007294B (de) |
Families Citing this family (9)
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)
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 |
-
1999
- 1999-07-20 DE DE19933968A patent/DE19933968A1/de not_active Withdrawn
-
2000
- 2000-06-03 EP EP00940306A patent/EP1124994B1/de not_active Revoked
- 2000-06-03 KR KR1020017002410A patent/KR20010079687A/ko not_active Application Discontinuation
- 2000-06-03 BR BR0006176-0A patent/BR0006176A/pt not_active Application Discontinuation
- 2000-06-03 AT AT00940306T patent/ATE262043T1/de not_active IP Right Cessation
- 2000-06-03 DE DE50005677T patent/DE50005677D1/de not_active Revoked
- 2000-06-03 ES ES00940306T patent/ES2215677T3/es not_active Expired - Lifetime
- 2000-06-03 CN CNB008008876A patent/CN1242073C/zh not_active Expired - Fee Related
- 2000-06-03 AU AU55284/00A patent/AU5528400A/en not_active Abandoned
- 2000-06-03 WO PCT/EP2000/005076 patent/WO2001006020A1/de not_active Application Discontinuation
- 2000-06-30 US US09/786,907 patent/US6689172B1/en not_active Expired - Fee Related
- 2000-12-08 ZA ZA200007294A patent/ZA200007294B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
CN1304455A (zh) | 2001-07-18 |
DE50005677D1 (de) | 2004-04-22 |
WO2001006020A1 (de) | 2001-01-25 |
ES2215677T3 (es) | 2004-10-16 |
BR0006176A (pt) | 2001-04-17 |
KR20010079687A (ko) | 2001-08-22 |
CN1242073C (zh) | 2006-02-15 |
EP1124994A1 (de) | 2001-08-22 |
ZA200007294B (en) | 2001-10-11 |
DE19933968A1 (de) | 2001-01-25 |
AU5528400A (en) | 2001-02-05 |
US6689172B1 (en) | 2004-02-10 |
ATE262043T1 (de) | 2004-04-15 |
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