DE517102C - Process for the pretreatment of vegetable tanned leather for drying - Google Patents
Process for the pretreatment of vegetable tanned leather for dryingInfo
- Publication number
- DE517102C DE517102C DET35471D DET0035471D DE517102C DE 517102 C DE517102 C DE 517102C DE T35471 D DET35471 D DE T35471D DE T0035471 D DET0035471 D DE T0035471D DE 517102 C DE517102 C DE 517102C
- Authority
- DE
- Germany
- Prior art keywords
- drying
- pretreatment
- tanned leather
- vegetable tanned
- weight
- 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
Links
- 238000001035 drying Methods 0.000 title claims description 8
- 239000010985 leather Substances 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 3
- 235000013311 vegetables Nutrition 0.000 title claims description 3
- 240000004808 Saccharomyces cerevisiae Species 0.000 claims description 5
- 241000894006 Bacteria Species 0.000 claims description 4
- 238000000855 fermentation Methods 0.000 claims description 4
- 230000004151 fermentation Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000004061 bleaching Methods 0.000 claims description 2
- 235000014680 Saccharomyces cerevisiae Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009963 fulling Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
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
- C14C7/00—Pasting processes (chemical part)
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 zur Vorbehandlung von vegetabilisch gegerbtem Leder für die Trocknung Bekanntlich hat man die gegerbten Häute vor dem Trocknen mit einer bleichend wirkenden Appreturmischung behandelt. Doch nimmt das Trocknen dieser gegerbten Häute noch übermäßig viel Zeit in Anspruch. Meist dauert es 5 bis 6 Tage, bis die Häute die erforderliche Trockenheit erhalten haben. Diese Zeitdauer kann wesentlich abgekürzt «-erden, wenn erfindungsgemäß mit der Appreturmischung gleichzeitig gärungerregende Stolle, wie Hefen oder Bakterien, mit verwendet werden.Process for the pretreatment of vegetable tanned leather for drying It is well known that the tanned hides are used with a before drying treated with a bleaching finish mixture. Yet drying takes this tanned Skins are still taking an inordinate amount of time. It usually takes 5 to 6 days for the The skins have received the required dryness. This length of time can be substantial abbreviated «earths, if according to the invention fermentation-inducing at the same time as the finish mixture Stolle, such as yeast or bacteria, can also be used.
Zu diesem Zweck wird das fertiggegerbte Leder vor dem Einbringen in den Trockenraum etwa 1,2 Stunde lang im WalkfaG bei einer Temperatur von 20 bis 25°C mit einer Flüssigkeit behandelt, die aus Wasser, gärungerrcgenden Stoffen und Bleichmitteln besteht. Als gärungerregende Stoffe kommen vor allen Dingen Hefen, insbesondere Bierhefe, und Bakterien in Betracht. Als Bleichmittel kommen die bekannten, für diesen Zweck in der Gerberei verwendeteil. Stoffe, insbesondere Wasserstoffsuperoxyd, Natriumhydrosulfit, Natriumhypochlorit u.dgl., in Betracht. Diese Mittel können bis zu einer Menge von 30 v. H. Gewichtsteilen dem Wasser zugesetzt werden. Durch eine derartige Vorbehandlung der Häute kann die Trocknungsdauer bis auf 1i/2 Stunden heruntergedrückt werden. Dabei wird außer der Trocknung zugleich noch eine Fixierung der Gerbstoffe auf der Oberfläche und ein Bleichen der Häute erreicht.For this purpose, the fully tanned leather is treated for about 1.2 hours in a fulling machine at a temperature of 20 to 25 ° C with a liquid consisting of water, fermentation-causing substances and bleaching agents before being placed in the drying room. Yeasts, especially brewer's yeast, and bacteria come into consideration as fermentation-inducing substances. The well-known bleaching agents used for this purpose in the tannery are used. Substances, in particular hydrogen peroxide, sodium hydrosulfite, sodium hypochlorite and the like., Into consideration. These funds can be used up to an amount of 30 per cent. H. Parts by weight are added to the water. By pretreating the skins in this way, the drying time can be reduced to 1½ hours. In addition to drying, the tanning agents are fixed on the surface and the hides are bleached.
Der angestrebte Zweck wird beispielsweise weise mit einer Flüssigkeit erreicht, die zu So Gewichtsteilen aus Wasser, zu 2o Gewichtsteilen aus Bierhefe, zu 5 Gewichtsteilen aus Magnesiasulfat, zu o,5 Gewichtsteilen aus gärungerregenden Bakterien besteht. Die genannten Bestandteile der Flüssigkeit können jedoch in weiten Grenzen je nach der gewünschten Farbe und sonstigen Eigenschaften des zu erzeugenden Leders schwanken.The intended purpose is for example wise with a liquid reached, which are 50 parts by weight from water, 2o parts by weight from brewer's yeast, to 5 parts by weight of magnesia sulfate, to 0.5 parts by weight of fermentation-inducing Bacteria. The mentioned components of the liquid can, however, in a wide range Limits depending on the desired color and other properties of the product to be produced Leather sway.
Die gleiche Mischung unter Fortlassung des Wasserzusatzes wird zweckmäßigerweise auch dem Nachgerbeextrakt zugesetzt.The same mixture, omitting the addition of water, is expedient also added to the retanning extract.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET35471D DE517102C (en) | 1928-07-26 | 1928-07-26 | Process for the pretreatment of vegetable tanned leather for drying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET35471D DE517102C (en) | 1928-07-26 | 1928-07-26 | Process for the pretreatment of vegetable tanned leather for drying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE517102C true DE517102C (en) | 1931-01-31 |
Family
ID=7559224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DET35471D Expired DE517102C (en) | 1928-07-26 | 1928-07-26 | Process for the pretreatment of vegetable tanned leather for drying |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE517102C (en) |
-
1928
- 1928-07-26 DE DET35471D patent/DE517102C/en not_active Expired
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