US1940265A - Agent and process for drenching skins - Google Patents
Agent and process for drenching skins Download PDFInfo
- Publication number
- US1940265A US1940265A US586968A US58696832A US1940265A US 1940265 A US1940265 A US 1940265A US 586968 A US586968 A US 586968A US 58696832 A US58696832 A US 58696832A US 1940265 A US1940265 A US 1940265A
- Authority
- US
- United States
- Prior art keywords
- drenching
- skins
- agent
- proteinases
- peptidases
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 8
- 102000035195 Peptidases Human genes 0.000 description 21
- 108091005804 Peptidases Proteins 0.000 description 21
- 235000019833 protease Nutrition 0.000 description 20
- 239000003795 chemical substances by application Substances 0.000 description 8
- 210000000496 pancreas Anatomy 0.000 description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 235000019270 ammonium chloride Nutrition 0.000 description 3
- 239000010985 leather Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 241000282887 Suidae Species 0.000 description 2
- 244000309466 calf Species 0.000 description 2
- 229940088598 enzyme Drugs 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000283707 Capra Species 0.000 description 1
- 102000005367 Carboxypeptidases Human genes 0.000 description 1
- 108010006303 Carboxypeptidases Proteins 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000001828 Gelatine Substances 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 235000010338 boric acid Nutrition 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229940024999 proteolytic enzymes for treatment of wounds and ulcers Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000000126 substance Substances 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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
Definitions
- the present invention relates to agents and a process for drenching skins.
- Drenching agents containing proteolytic enzymes for instance those of the pancreas, are already known.
- the known drenching agents of this kind consist of mixtures of proteinases and aminoand carboxypeptidases, which constituents it was hitherto hardly possible to separate from one another.
- the present-invention is based on the discovery that solutions of pancreas proteinases free from peptidases, and particularly from carboxypetidases, constitute drenching agents giving a particularly good drenching effect.
- the skins drenched with these proteinases and the leathers produced therefrom have, as compared with those drenched with a mixture of pro teinases and peptidases, a more compact and softer touch without, however, being flabby.
- the proteinases free from peptidases can be utilized in the same manner as the drenching agents hitherto used.
- the usual buffering agents may be employed, such as ammonium salts, for instance ammonium sulfate or ammonium chloride, or lactic acid, boric acid, sodium bisulfite or other substances having a similar action.
- the said agents may be employed in a preliminary bath before the drenching process or alternatively,- particularly in the case of ammonium saltsthey may be applied in the drenching solution itself.
- the proteinases free from peptidases, which are utilized in the present ,process can for instance be obtained according to the process set forth in the British Patent Specification No. 356,638, dated January 31, 1930, in the name of Kalle 81 Co. Aktiengesellschaft.
- the quantity of enzyme employed is such that 1.0 kilo of gelati'ne after treatment therewith for 1 hour at 37 C., no longer solidify on cooling. 20
- 20 kilosof unhaired goat skins are treated for hour at about 38 C. in a reel with 100 liters of water and 0.2 kilo of a mixture of ammonium sulfateand pancreas proteinase free from peptidase.
- the quantity of enzymes contained in the mixture is such as to be capable of liquefying 2.5 kilos of gelatine at 37 C. after an hour's action. After having been drenched, the skins are worked up in the usual manner. An excellent leather is thus obtained.
Description
Patented Dec. 19, 1933 PATENT OFFICE 1,940,265 AGENT AND raoosss FOR DRENCHING sxms Wilhelm Neugebauer, Wiesbaden-Biebrich, Germany, assignor to Kalle & Co.
Aktiengesellschatt, Wiesbaden-Biebrich, Germany No Drawing. Application January 15, 1932,
Serial No. 1931 3 Claims.
The present invention relates to agents and a process for drenching skins.
Drenching agents containing proteolytic enzymes, for instance those of the pancreas, are already known. The known drenching agents of this kind consist of mixtures of proteinases and aminoand carboxypeptidases, which constituents it was hitherto hardly possible to separate from one another.
The present-invention is based on the discovery that solutions of pancreas proteinases free from peptidases, and particularly from carboxypetidases, constitute drenching agents giving a particularly good drenching effect. The skins drenched with these proteinases and the leathers produced therefrom have, as compared with those drenched with a mixture of pro teinases and peptidases, a more compact and softer touch without, however, being flabby.
The proteinases free from peptidases can be utilized in the same manner as the drenching agents hitherto used. For the neutralization of the alkalinity of the skins coming from the lime liquor, the usual buffering agents may be employed, such as ammonium salts, for instance ammonium sulfate or ammonium chloride, or lactic acid, boric acid, sodium bisulfite or other substances having a similar action. The said agents may be employed in a preliminary bath before the drenching process or alternatively,- particularly in the case of ammonium saltsthey may be applied in the drenching solution itself.
The proteinases free from peptidases, which are utilized in the present ,process; can for instance be obtained according to the process set forth in the British Patent Specification No. 356,638, dated January 31, 1930, in the name of Kalle 81 Co. Aktiengesellschaft.
The following examples illustrate the invention:
1. 0.1 kilo of ammonium chloride and a quantity oi proteinase free from. peptidase obtained from hogs pancreas by the process according to the specification above-mentioned,
586,968, and in Germany January 24,
are dissolved in liters of water. The quantity of enzyme employed is such that 1.0 kilo of gelati'ne after treatment therewith for 1 hour at 37 C., no longer solidify on cooling. 20
kilos of limed, unhaired and rinsed calf skins 50 of normal quality are treated with this solution for 1 hour at about 37 C.
By that time the pelts will have become drenched. After being worked up in the usual manner, they yield a leather of a softer and more compact touch than a leather which has been drenched with the natural mixture of proteinases and peptidases of hogs pancreas.
2. 20 kilosof unhaired goat skins are treated for hour at about 38 C. in a reel with 100 liters of water and 0.2 kilo of a mixture of ammonium sulfateand pancreas proteinase free from peptidase. The quantity of enzymes contained in the mixture is such as to be capable of liquefying 2.5 kilos of gelatine at 37 C. after an hour's action. After having been drenched, the skins are worked up in the usual manner. An excellent leather is thus obtained.
3. 20 kilos of limed and unhaired calf pelts are stirred in a bath consisting of lactic acid of to 1% strength until a test portion cut from the pelt only yields a slight red coloration with phenolphthaleine. The skins are then taken out of the bath, rinsed and treated with a drenching agent as indicated in Example 1. The quantity of ammonium chloride usually added may be reduced or even omitted.
I claim:
1. The process of drenching skins which consists in causing a solution of pancreas proteinases free from peptidases to act upon the skins.
2. The process of drenching skins whichconsists in causing a solution of pancreas proteinases free from peptidases containing an ad-- WILI-IELM NEUGEBAUER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK118589A DE566111C (en) | 1931-01-24 | 1931-01-24 | Apparatus for spinning seamless tubes made of regenerated cellulose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1940265A true US1940265A (en) | 1933-12-19 |
Family
ID=89428875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US586968A Expired - Lifetime US1940265A (en) | 1931-01-24 | 1932-01-15 | Agent and process for drenching skins |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1940265A (en) |
| DE (1) | DE566111C (en) |
| FR (1) | FR730350A (en) |
| NL (1) | NL31660C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE852900C (en) * | 1951-06-02 | 1952-10-20 | Continental Gummi Werke Ag | Method and device for the manufacture of hoses from latex |
-
1931
- 1931-01-24 DE DEK118589A patent/DE566111C/en not_active Expired
-
1932
- 1932-01-13 NL NL59842A patent/NL31660C/en active
- 1932-01-15 US US586968A patent/US1940265A/en not_active Expired - Lifetime
- 1932-01-23 FR FR730350D patent/FR730350A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE566111C (en) | 1932-12-10 |
| NL31660C (en) | 1933-12-15 |
| FR730350A (en) | 1932-08-11 |
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