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DE486977C - Method of weighing and fastening leather - Google Patents

Method of weighing and fastening leather

Info

Publication number
DE486977C
DE486977C DER67186D DER0067186D DE486977C DE 486977 C DE486977 C DE 486977C DE R67186 D DER67186 D DE R67186D DE R0067186 D DER0067186 D DE R0067186D DE 486977 C DE486977 C DE 486977C
Authority
DE
Germany
Prior art keywords
leather
weighing
parts
fastening
glue
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.)
Expired
Application number
DER67186D
Other languages
German (de)
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.)
Roehm GmbH Darmstadt
Original Assignee
Roehm and Haas GmbH
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 Roehm and Haas GmbH filed Critical Roehm and Haas GmbH
Priority to DER67186D priority Critical patent/DE486977C/en
Application granted granted Critical
Publication of DE486977C publication Critical patent/DE486977C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14CCHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C9/00Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes

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)

Description

Verfahren zum -Beschweren und Festmachen von Leder Bisher hat man versucht, durch Anwendung von Leire, der in Gegenwart von überschüssigem Gerbstoff unlöslich gemacht wurde, Leder fester zu machen. Für diesen Zweck eignet sich aber Leim nur 'unvollkommen, weil. er wegen seiner hochmolekularen Zusammensetzung schwer in das Leder eindringt. Auch ist es bekannt, mit Säure oder Alkali gespaltenen Leim zum Festmachen von Leder zu verwenden. Derart abgebauter Leim hat aber den Nachteil, daß er zuviel Alkaüsalz enthält, welches im Leder unerwünscht ist. Außerdem ist mit Alkali behandelter Leim wegen der noch immer beträchtlichen Molekülgröße nicht geeignet, vollständig in das Leder einzudringen.Method for weighting and securing leather So far, one has tried by applying leire in the presence of excess tanning agent made insoluble to make leather stronger. For this purpose, however, is suitable Glue just 'imperfect because. it is heavy because of its high molecular composition penetrates the leather. It is also known to split glue with acid or alkali to be used for fastening leather. However, such degraded glue has the disadvantage that it contains too much alkali salt, which is undesirable in leather. Also is alkali treated glue does not because of the still considerable molecular size able to penetrate completely into the leather.

Es wurde gefunden, daß Eiweißstoffe, die bei gewöhnlicher oder höherer Temperatur mit Enzymen so weit abgebaut werden, daß der Formolstickstoff io % des Gesamtstickstoffes nicht überschreitet, den überschüssigen Gerbstoff im Leder sehr gut abbinden, das Leder beschweren und festmachen.It has been found that protein substances, which at ordinary or higher Temperature are reduced so far with enzymes that the formol nitrogen io% des Total nitrogen does not exceed the excess tannin in the leather very much Tie off well, weigh down the leather and fasten it.

Gegebenenfalls können noch Haltbarkeitszusätze gemacht werden. Beispielsweise wird so gearbeitet, daß ioo Teile Leder mit a Teilen, mit Enzym abgebautem Eiweiß und mit io Teilen Wasser gewalkt werden. Das zur Verwendung gelangende abgebaute Eiweiß. kann z. B. so gewonnen werden, daß. 65 Teile Leim mit 4.o Teilen Wasser versetzt werden. Diese Lösung wird alkalisch gemacht und mit o,o5 Teilecu handelsüblichem Pankreatin versetzt. Nach einstündiger Reaktionsdauer wird der Abbauprozeß, durch Erhitzen auf 9o bis ioo° beendet. Die so abgebauten Erzeugnisse können gegebenenfalls Zusätze zwecks Haltbai-machung erhalten.If necessary, shelf life additions can be made. For example it is worked in such a way that 100 parts of leather with a parts of enzyme-degraded protein and tumbled with 10 parts of water. The dismantled that is to be used Protein. can e.g. B. be obtained so that. 65 parts of glue with 4.o parts of water be moved. This solution is made alkaline and with 0.05 parts cu commercially available Pancreatin spiked. After a reaction time of one hour, the degradation process is through Heating to 90 to 100 ° ended. The products degraded in this way can, if necessary Received additives for the purpose of holding.

Claims (1)

PATENTANSPRUCH: Verfahren zum. Beschweren und Festmachen von Leder, dadurch gekennzeichnet, daß Eiweißstoffe verwendet werden, die bei gewöhnlicher oder höherer Temperatur mit Enzymen so weit abgebaut werden, daß der Formo'lstickstoff io % des Gesamtstickstoffes nicht überschreibet und wobei gegebenenfalls noch Haltbarkeitszusätze gemacht werden.PATENT CLAIM: Method for. Weighting down and fastening of leather, characterized in that protein substances are used that with ordinary or higher temperature can be broken down with enzymes to such an extent that the formo'l nitrogen io% of the total nitrogen is not overwritten and, if necessary, shelf life additions be made.
DER67186D 1926-04-01 1926-04-01 Method of weighing and fastening leather Expired DE486977C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER67186D DE486977C (en) 1926-04-01 1926-04-01 Method of weighing and fastening leather

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER67186D DE486977C (en) 1926-04-01 1926-04-01 Method of weighing and fastening leather

Publications (1)

Publication Number Publication Date
DE486977C true DE486977C (en) 1929-11-28

Family

ID=7413068

Family Applications (1)

Application Number Title Priority Date Filing Date
DER67186D Expired DE486977C (en) 1926-04-01 1926-04-01 Method of weighing and fastening leather

Country Status (1)

Country Link
DE (1) DE486977C (en)

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