DE1030300B - Process for hardening artificial skin or synthetic leather - Google Patents
Process for hardening artificial skin or synthetic leatherInfo
- Publication number
- DE1030300B DE1030300B DEA21749A DEA0021749A DE1030300B DE 1030300 B DE1030300 B DE 1030300B DE A21749 A DEA21749 A DE A21749A DE A0021749 A DEA0021749 A DE A0021749A DE 1030300 B DE1030300 B DE 1030300B
- Authority
- DE
- Germany
- Prior art keywords
- artificial
- leather
- synthetic
- hardening
- resins
- 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.)
- Pending
Links
- 239000002649 leather substitute Substances 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 8
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000057 synthetic resin Substances 0.000 claims description 6
- 229920003002 synthetic resin Polymers 0.000 claims description 6
- 239000005711 Benzoic acid Substances 0.000 claims description 5
- 235000010233 benzoic acid Nutrition 0.000 claims description 5
- 239000010985 leather Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000000080 wetting agent Substances 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000005018 casein Substances 0.000 claims description 4
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 claims description 4
- 235000021240 caseins Nutrition 0.000 claims description 4
- 239000004816 latex Substances 0.000 claims description 4
- 229920000126 latex Polymers 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 235000013311 vegetables Nutrition 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims 2
- 239000007864 aqueous solution Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000006185 dispersion Substances 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- 235000018102 proteins Nutrition 0.000 claims 1
- 102000004169 proteins and genes Human genes 0.000 claims 1
- 108090000623 proteins and genes Proteins 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-M Butyrate Chemical compound CCCC([O-])=O FERIUCNNQQJTOY-UHFFFAOYSA-M 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Natural products CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 1
- 240000008886 Ceratonia siliqua Species 0.000 description 1
- 235000013912 Ceratonia siliqua Nutrition 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 239000001828 Gelatine Substances 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/06—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Verfahren zum Härten von Kunsthäuten oder von Faserkunstleder Die Erfindung bezieht sich auf ein Verfahren zum Härten von Kunsthaut oder von Faserkunstleder, die auf der Basis mittels syntheüisehen oder Naturlatex verbundener Kunst- oder Naturfasern hergestellt sind.Method for hardening artificial skins or synthetic fiber leather Die The invention relates to a method for hardening artificial skin or fiber artificial leather, those on the basis of synthetic or natural latex connected artificial or Natural fibers are made.
Die Herstellung von Kunsthaut oder Kunstleder, die aus den vorstehend genannten Rohstoffen, gemischt mit Vulkanisationsmitteln, geeigneten Füllstoffen und anderen notwendigen Rohstoffen, hergestellt sind, ist bereits bekannt.The manufacture of artificial skin or artificial leather resulting from the above named raw materials, mixed with vulcanizing agents, suitable fillers and other necessary raw materials, are already known.
Obwohl die Kunsthaut oder das Kunstleder, die unter Verwendung der vorstehend genannten Rohstoffe hergestellt werden, für die verschiedensten Anwendungsgebiete brauchbar sind, können sie nicht geformt (abgegossen) oder halb verfor.nt werden, und es ist auch nicht einfach, sie zu härten oder zu appretieren und dabei gleichzeitig ihre hohe Porosität aufrechtzuerhalten.Although the artificial skin or the artificial leather made using the above-mentioned raw materials are produced for a wide variety of applications are usable, they cannot be molded (poured) or semi-deformed, and it is also not easy to harden or finish them and at the same time maintain their high porosity.
Wenn die Härte durch einen starken Druck erreicht werden soll, dann verliert das Kunstleder seine Porosität und damit sein wichtigstes Merkmal, um als Sohlenleder, für Schulivorder- und Hinterkappen und Brandsohlen für Schuhwerle verwendet zu werden.If hardness is to be achieved by applying strong pressure, then the artificial leather loses its porosity and thus its most important characteristic in order to be considered Sole leather, used for school toe and heel caps and insoles for shoes to become.
Um die genannten Nachteile zti vermeiden und um ein gehärtetes Kunstleder oder eine Kunsthaut herzustellen, die dennoch porös und für die genannte Anwendung geeignet sind, ist das erfindungsgemäße Verfahren entwickelt worden, das im wesentlichen darin besteht, dem aus mittels synthetischen oder Naturlatex verbundenen synthetischen oder Naturfasern hergestellten Kunstleder oder der Kunsthaut in seinem Stadium der höchsten Porosität eine härtende oder appretierende Substanz beizufügen, deren Einbringung im Augenblick der Herstellung der Kunsthaut oder des Kunstleders erfolgen kann oder wenn diese beendet ist. In diesem letzteren Fall erfolgt das Einbringen mittels eines warmen oder kalten Bades, je nach dem beabsichtigen Verwendungszweck des Erzeugnisses.To avoid the disadvantages mentioned and to use a hardened synthetic leather or to produce an artificial skin that is nonetheless porous and suitable for the application mentioned are suitable, the inventive method has been developed that essentially consists of the one made of synthetic or natural latex linked by means of synthetic or natural fibers made of artificial leather or the artificial skin in its stage of the to add a hardening or finishing substance to the highest porosity, its introduction can take place at the moment of production of the artificial skin or the artificial leather or when this is finished. In the latter case, it is introduced by means of a warm or cold bath, depending on the intended use of the product.
Die härtenden oder appretierenden Substanzen, die verwendet werden können, können natürlicher Art sein, z. B. Stärke, Maniok, Casein, Gelatine, Leim, Gummilack, Dextrin, Johannisbrotsamen, Naturharze, oder auch synthetischer Art, wie Polyvinylchlorid, Polyvinylbutyrat, Polyvinylazetat, Acrylharze u. a., zusammen mit ihren üblichen Ergänzungsstoffen. Bei dein genannten Einbringen kann es vorteilhaft sein, Netzmittel zti verwenden.The hardening or finishing substances that are used can be natural, e.g. B. starch, cassava, casein, gelatine, glue, Rubber lacquer, dextrin, carob seeds, natural resins, or synthetic ones, such as polyvinyl chloride, polyvinyl butyrate, polyvinyl acetate, acrylic resins and others together with their usual supplements. In the case of your mentioned contribution, it can be advantageous be, use wetting agent zti.
Das Härten kann auch erreicht werden, indem das Einbringen der vorstehend genannten Appreturmittel vermindert wird und statt dessen bei der Herstellung der Kunsthaut oder des Kunstleders der Mischung Latex zusammen mit anderen notwendigen Ergänzungsstoffen und einem Härtungsmittel für Gummi beigegeben wird, wovon als Beispiel Benzoesäure genannt wird; das gleiche Ergebnis kann auch erzielt werden, indem der Anteil an Schwefel wesentlich erhöht wird.Hardening can also be achieved by incorporating the above said finishing agent is reduced and instead in the production of the Mixture latex artificial skin or artificial leather along with other necessary ones Supplements and a hardener for rubber is added, of which as Benzoic acid is mentioned as an example; the same result can also be achieved by significantly increasing the proportion of sulfur.
Die behandelten Kunsthäute oder Faserkunstleder zeigen eine nicht herabgesetzte Porosität und sind genügend hart, so daß sie für die Herstellung von Sohlen, hinteren und vorderen Schuhkappen und Brandsohlen geeignet sind.The treated artificial skins or synthetic leather do not show any reduced porosity and are sufficiently hard that they are suitable for the manufacture of Soles, rear and front shoe caps and insoles are suitable.
Kunstleder auf der Grundlage einer mit Vinyl-oder Acrylliarzen und Plastifiziermitteln agglomerierten Fasermasse sind bekannt. Demgegenüber ist erfindungswesentlich die Erzielung einer Härtung durch Zusatz von den Kautschuk nachhärtenden Mitteln zum Latex, wie durch den Zusatz von Benzoesäure oder von einem erhöhten Anteil Schwefel. Es wird dadurch ein künstliches Leder erhalten, das für bestimmte und fest umrissene Anwendungen, wie z. B. im Schuhinnern. als Vorder- und Hinterkappen, Ränder usw., geeignet ist.Imitation leather on the basis of a vinyl or acrylic resin and Plasticizers for agglomerated fiber mass are known. In contrast, is essential to the invention the achievement of hardening by adding the rubber post-hardening agents to latex, for example by adding benzoic acid or an increased proportion of sulfur. An artificial leather is thereby obtained, which is suitable for specific and clearly defined Applications such as B. inside the shoe. as front and back caps, rims, etc., suitable is.
Ferner wird nach dein neuen Verfahren die Härtung durch Eintauchen der bereits fertigen Stücke in ein Bad erreicht, das die härtenden und appretierenden Substanzen enthält, wobei vorzugsweise in der Wärme gearbeitet wird, damit die im Bad enthaltenen Substanzen in das Innere der Poren des Kunstleders eintreten können, ohne dessen Porosität zu verändern, weil bei Eindringen einer Lösung nach Verdampfung des Wassers der von diesem eingenommene Raum als Hohlraum, d. h. als Pore, bestehenbleibt. Gegebenenfalls kann das Imprägnieren - mit Netzmitteln vorgenommen werden, wobei dann keine erhöhte Temperatur erforderlich ist.Furthermore, according to your new method, the hardening is done by immersion of the already finished pieces reaches a bath, which the hardening and finishing Contains substances, preferably working in the heat so that the im Substances contained in the bath can enter the interior of the pores of the synthetic leather, without changing its porosity, because if a solution penetrates after evaporation of the water that taken by it Space as a cavity, d. H. as a pore, persists. If necessary, impregnation - with wetting agents be made, in which case no elevated temperature is required.
_ Beispiel 1 100 Teile Wasser, 10 Teile Casein, l Teil Ammoniak, zwischen 1/2 und l Teil Netzmittel werden bei Räumtemperatur -gemischt._ Example 1 100 parts of water, 10 parts of casein, 1 part of ammonia, between 1/2 and 1 part wetting agent are mixed at room temperature.
Die Platten Faserkunstleder der beschriebenen Art werden 12 bis 48 Stunden in obiges Gemisch eingetaucht, vorzugsweise 24 Stunden; sodann werden sie herausgenommen und bei normaler Temperatur oder beschleunigt durch Wärme getrocknet. Beispiel 2 Dieselbe Mischung gemäß Beispiel 1, jedoch ohne Netzmittel, wird im Wasserbad erwärmt; sodann werden die Kunstlederstücke einige Minuten in dieses Bad eingetaucht, herausgenommen und getrocknet. Beispiel 3 Im laufenden Kunstlederfabrikationsprozeß wird das Kunstleder durch ein Bad gemäß Beispiel 1 bewegt, worauf dann der nicht unterbrochene Trocknungsvorgang stattfindet.The synthetic leather panels of the type described are 12 to 48 Immersed in the above mixture for hours, preferably 24 hours; then they will taken out and dried at normal temperature or accelerated by heat. Example 2 The same mixture as in Example 1, but without a wetting agent, is made in a water bath warmed; then the artificial leather pieces are immersed in this bath for a few minutes, taken out and dried. Example 3 In the ongoing artificial leather manufacturing process the artificial leather is moved through a bath according to Example 1, whereupon it is not interrupted drying process takes place.
Bei Verwendung pflanzlicher Leime oder Harze sind die gleichen Mengenverhältnisse und Arbeitsbedingungen anzuwenden, wie sie in den Beispielen 1 und 3 angegeben sind, nur daß an Stelle des Caseins Leime oder Harze zu verwenden sind. Bei all diesen Arbeitsweisen kann bei Verwendung von Leimen oder Harzen dem Eintauchbad etwas Formaldehyd zugesetzt werden. Dieses Formaldehyd kann auch bereits auf das mit den Leimen oder Harzen behandelte Leder aufgebracht werden. Beispiel 4 Wenn es sich darum handelt, das Härten des Kunstleders durch Zusatz von Benzoesäure zur Kautschukmischung hervorzurufen, so ist nachstehend die Zusammensetzung der zum Imprägnieren der Fasern zur Verwendung kommenden Mischung angegeben: 100 Teile (Trockensubstanz) Latex, 3 Teile Zinkoxyd, 1/2 Teil Schwefel, 1%, Beschleuniger, 1% Antioxydans, 100 Teile Füllmaterial, zwischen 1 und 10% Benzoesäure, 3 Teile Stabilisierungsmittel und das eiförderliche Wasser.When using vegetable glues or resins, the same proportions are used and to apply working conditions as given in Examples 1 and 3, only that glues or resins are to be used in place of casein. With all of these When using glues or resins, the immersion bath can use a little formaldehyde can be added. This formaldehyde can already be applied to the glue or Resin-treated leather can be applied. Example 4 If it is a question of cause the artificial leather to harden by adding benzoic acid to the rubber mixture, so below is the composition that for impregnating the fibers for use The following mixture is indicated: 100 parts (dry matter) latex, 3 parts zinc oxide, 1/2 part sulfur, 1% accelerator, 1% antioxidant, 100 parts filler, between 1 and 10% benzoic acid, 3 parts stabilizer and the egg-conducive water.
Beispiel 5 Ist ein Härten von mittels Kunstharzemulsion hergestelltem Faserkunstleder erwünscht, so kann dies dadurch erreicht werden, daß man den prozentualen Anteil an Plastifizierungsmittel, den die Kunstharze benötigen, auf ein Verhältnis herabsetzt, das nur zwischen 5 und 15% des Trockengewichtes der Kunstharze liegt.Example 5 is a curing of synthetic resin emulsion If synthetic leather is desired, this can be achieved by the percentage Percentage of plasticizer that the synthetic resins require on a ratio reduces, which is only between 5 and 15% of the dry weight of the synthetic resins.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES1030300X | 1953-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1030300B true DE1030300B (en) | 1958-05-22 |
Family
ID=8311617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA21749A Pending DE1030300B (en) | 1953-12-17 | 1954-12-16 | Process for hardening artificial skin or synthetic leather |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1030300B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB640245A (en) * | 1940-03-01 | 1950-07-19 | Joseph Seraphim | Method for the preparation of synthetic hide |
| GB644856A (en) * | 1944-10-28 | 1950-10-18 | Joseph Seraphim | Method for the manufacture of artificial leather or hide |
| FR971406A (en) * | 1940-05-15 | 1951-01-17 | Process for manufacturing a plastic material usable as a leather substitute, and material obtained by this process |
-
1954
- 1954-12-16 DE DEA21749A patent/DE1030300B/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB640245A (en) * | 1940-03-01 | 1950-07-19 | Joseph Seraphim | Method for the preparation of synthetic hide |
| FR971406A (en) * | 1940-05-15 | 1951-01-17 | Process for manufacturing a plastic material usable as a leather substitute, and material obtained by this process | |
| GB644856A (en) * | 1944-10-28 | 1950-10-18 | Joseph Seraphim | Method for the manufacture of artificial leather or hide |
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