DE1008252B - Process for covering packaging materials or the inner surfaces of casting molds - Google Patents
Process for covering packaging materials or the inner surfaces of casting moldsInfo
- Publication number
- DE1008252B DE1008252B DED11941A DED0011941A DE1008252B DE 1008252 B DE1008252 B DE 1008252B DE D11941 A DED11941 A DE D11941A DE D0011941 A DED0011941 A DE D0011941A DE 1008252 B DE1008252 B DE 1008252B
- Authority
- DE
- Germany
- Prior art keywords
- pectin
- packaging materials
- casting molds
- solutions
- inner surfaces
- 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
- 239000005022 packaging material Substances 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 8
- 238000005266 casting Methods 0.000 title claims description 7
- 229920001277 pectin Polymers 0.000 claims description 15
- 239000001814 pectin Substances 0.000 claims description 14
- 235000010987 pectin Nutrition 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 235000010443 alginic acid Nutrition 0.000 claims description 6
- 229920000615 alginic acid Polymers 0.000 claims description 6
- 239000000783 alginic acid Substances 0.000 claims description 5
- 229960001126 alginic acid Drugs 0.000 claims description 5
- 150000004781 alginic acids Chemical class 0.000 claims description 5
- 229920002230 Pectic acid Polymers 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- LCLHHZYHLXDRQG-ZNKJPWOQSA-N pectic acid Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)O[C@H](C(O)=O)[C@@H]1OC1[C@H](O)[C@@H](O)[C@@H](OC2[C@@H]([C@@H](O)[C@@H](O)[C@H](O2)C(O)=O)O)[C@@H](C(O)=O)O1 LCLHHZYHLXDRQG-ZNKJPWOQSA-N 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims 1
- AEMOLEFTQBMNLQ-BKBMJHBISA-N alpha-D-galacturonic acid Chemical compound O[C@H]1O[C@H](C(O)=O)[C@H](O)[C@H](O)[C@H]1O AEMOLEFTQBMNLQ-BKBMJHBISA-N 0.000 claims 1
- 239000010318 polygalacturonic acid Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 238000005470 impregnation Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical class [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 229910001385 heavy metal Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical class [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 206010042674 Swelling Diseases 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical class [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229940072056 alginate Drugs 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Chemical class 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011133 lead Chemical class 0.000 description 1
- 229940046892 lead acetate Drugs 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- -1 putties Substances 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Chemical class 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
Description
Verfahren zum Oberziehen von Verpackungsmaterialien oder der Innenflächen von Gießformen Das Hauptpatent beschreibt ein Verfahren zum Überziehen von Verpackungsmaterialien für klebende bzw. durch Temperatureinwirkungen weich werdende Massen, wie Bitum,itia" Teerprodukte, Harze, Kunstharze,. Wachse, Kitte., Pasten, Paraffin-Gatsche u. dgl., sowie zur Behandlung der Innenflächen von Gießformen. Nach diesem Verfahren werden Verpackungsmaterialien üblicher Art, z. B. solche aus Metall, Holz, Papier, Faserstoffen oder Gewebe, oder Gießformen mit der Auflösung eines löslichen Derivats der Algi.nsä@ure behandelt und die aufgetragenen Impr ägnieruugs- bzw. Überzugsschichten durch eine anschließende in ein unlösliches Derivat der Alginsäure übergeführt.Process for covering packaging materials or the inner surfaces of casting molds The main patent describes a method for coating packaging materials for adhesive compounds or compounds that become soft due to the effects of temperature, such as bitum, itia " Tar products, resins, synthetic resins ,. Waxes, putties, pastes, paraffin slacks and the like, as well as for treating the inner surfaces of casting molds. Following this procedure will be Packaging materials of the usual type, e.g. B. those made of metal, wood, paper, fibers or tissue, or casting molds with the dissolution of a soluble derivative of Algi.nsä@ure treated and the applied impregnation or coating layers through a subsequently converted into an insoluble derivative of alginic acid.
Nach dem Hauptpatent verwendet man zu der imprägnierenden Behandlung vorteilhaft wäßrige Lösungen von Ammonium- oder Alkalialginat in Konzentrationen von i/2 bis 51/o. Bei diesem Verfahren kann die Überführung der Imprägnierungs- bzw. Überzugsschichten in ein unlösliches Derivat der Alginsäure durch Behandlung mit gelösten oder gasförmigen Säuren, beispielsweise Salzsäure, Essigsäure, Propionsä.ure, oder durch Bethandlung mit fällend wirkenden Salzen, beispielsweise Erdalkalisalzen oder Schwernietallsalzen, vorgenommen werden. Besonders vorteilhaft ist die Verwendung einen konzentrierten Lösung von Calciumchlorid - als Fällungsmittel.According to the main patent, it is used for the impregnating treatment advantageously aqueous solutions of ammonium or alkali alginate in concentrations from i / 2 to 51 / o. In this process, the transfer of the impregnation or coating layers in an insoluble derivative of alginic acid by treatment with dissolved or gaseous acids, e.g. hydrochloric acid, acetic acid, propionic acid, or by treatment with precipitating salts, for example alkaline earth salts or heavy metal salts. The use is particularly advantageous a concentrated solution of calcium chloride - as a precipitant.
Nach dem Hauptpatent können der Imprägnierlösung und bzw. oder auch gegebenenfalls dem Fällungsbad ein wasserlöslicher hygroskopischer Stoff, z. B. Glycerin, Glykol, und bzw. oder Mittel zur Erhöhung der Elastizität und Plastizität zugegeben werden, beispielsweise Celluloseaabköminlitige, wie Cellulo-seä ther, oder Derivate der Stärke: bzw. Zuckerarten, vorzugsweise solche mit hygroskopischen Eigenschaften.According to the main patent, the impregnation solution and / or also optionally the precipitation bath a water-soluble hygroscopic substance, z. B. Glycerine, glycol, and / or means to increase elasticity and plasticity are added, for example, cellulosic acid, such as cellulosea ether, or derivatives of starch: or types of sugar, preferably those with hygroscopic Properties.
Schließlich können der Imprägnierungslösung nach dem Hauptpatent Füllmaterialien in Faser- oder Pulverform, Beispielsweise gemahlene Faserstoffe, Mineralien, Papiermehl, Holzmehl od. dgl., und/oder abstrahlend wirkende Metallpulver, beispielsweise Aluminiumpulver, und/oder auch lösliche- Farbstoffe bzw. Pigmentfarbstoffe beigemischt werden.Finally, the impregnation solution according to the main patent can contain filling materials in fiber or powder form, e.g. ground fiber, minerals, paper flour, Wood flour or the like, and / or metal powder with a radiating effect, for example aluminum powder, and / or soluble dyes or pigment dyes are added.
Nach dem Verfahren des Hauptpatents entstehen auf der Oberfläche oder in den Poren der Verpackungsmaterialien oder auf der Innenfläche von Gießformen Filme, die für klebende oder bei höheren Temperaturen weich werdende Massen, wie Bitumen, Harze usw., undurchlässig ,und temperaturbeständig sind. Man kann daher z. 13. in einen behandelten Papiersack bei etwa 200 bis 250° C verflüssigtes Bitumen eingießen und nach dein Erkalten zum Versand bringen. Das Verpackungsmaterial bleibt an dem eingefüllten Bitumen nicht kleben, so daß das Versandgut leicht aus dein bzw. vom Verpackungsmaterial getrennt werden kann.According to the process of the main patent, films are formed on the surface or in the pores of the packaging materials or on the inner surface of casting molds, which are impermeable and temperature-resistant to adhesive compounds or compounds which become soft at higher temperatures, such as bitumen, resins, etc. You can therefore z. 13. Pour liquefied bitumen into a treated paper sack at around 200 to 250 ° C and send it to shipping after it has cooled down. The packaging material does not stick to the bitumen that has been filled in, so that the goods to be shipped can easily be separated from the packaging material.
Es wird nun vorgeschlagen, die in der Verpackungsindustrie bereits bekannten Pektinstoffe an Stelle von Alginsäurederivaten zu verwenden. Die bisher bekannten Pektinüberzüge dienten als Verpackungsmaterial für Nahrungsmittel. Sie wurden durch Antrocknen von wäßrigen Pektinlösungen allein oder unter Zusatz von Zucker und Konservierungsmitteln hergestellt. Derartige Überzüge sind jedoch nicht @unlöslich und enthalten wenig oder gar kein Wasser. Beim Einfüllen der heißen erweichten bituminösen Stoffe werden sie spröde und brechen. Das Ziel der Erfindung ist dagegen, unlösliche Pektinü'berzüge herzustellen, die durch ihren Wassergehalt selbst bei den hohen Einfülltemperaturen für erweichte bituminöse Stoffe elastisch und dicht bleiben.It is now proposed to be used in the packaging industry to use known pectin substances instead of alginic acid derivatives. The so far known pectin coatings served as packaging material for food. she were made by drying aqueous pectin solutions alone or with the addition of Sugar and preservatives made. However, such coatings are not @ Insoluble and contain little or no water. Softened when pouring the hot bituminous substances they become brittle and break. The aim of the invention, on the other hand, is to produce insoluble pectin coatings which, due to their water content, contribute to the high filling temperatures for softened bituminous materials elastic and tight stay.
Es wurde nun gefunden, d'aß man dies - wie im Hauptpatent - erreichen kann, wenn man die Verpackungsmaterialien bzw. Gießformen statt mit Lösungen von Alginsäurederivaten mit Lösungen bzw. Anquellungen von Pektinstoffen imprägniert bzw. überzieht und dann diurch Behandlung der aufgetragenen Schichten bzw. Überzüge die löslichen Pektinstoffe in unlösliche Verbindungen überführt.It has now been found that this can be achieved - as in the main patent can, if one uses the packaging materials or casting molds instead of solutions from Alginic acid derivatives impregnated with solutions or swellings of pectin substances or coated and then by treating the applied layers or coatings converts the soluble pectin substances into insoluble compounds.
Unter Pektinstoffen sind im Sinn der Erfindung alle in Wasser löslichen oder quellbaren Derivate der Pektinsäure zu verstehen, z. B. deren Ester oder Salze, wie sie als Pektine, Pektate und Pektinate bezeichnet werden. Als Fäldungsmittel können, wie nach dem Hauptpatent, gasförmige oder in Wasser gelöste Säuren oder wasserlösliche Salze der Erdalkali- bzw. Schwermetalle usw. verwendet werden, beispielsweise Salzsäure, Essigsäure, Eisen-, Kupfer-, Zink-, Bleisalze, wie Eisenchlorid, Kupfersulfat, Bleiacetat.-Besonders vorteilhaft .eignen sich konzentrierte wäßrige Lösungen des Caleiumchlorids.For the purposes of the invention, pectin substances are all those which are soluble in water or to understand swellable derivatives of pectic acid, e.g. B. their esters or salts, as they are called pectins, pectates and pectinates. as As according to the main patent, precipitants can be gaseous or dissolved in water Acids or water-soluble salts of the alkaline earth or heavy metals etc. are used are, for example, hydrochloric acid, acetic acid, iron, copper, zinc, lead salts, such as iron chloride, copper sulfate, lead acetate.-Particularly advantageous. Suitable concentrated aqueous solutions of calcium chloride.
Wie nach dem Hauptpatent können auch den nach der Erfindung zu verwendenden Imprägnierungslösungen bzw. Fällungsbädern die gleichen Zuschlagstoffe zugegeben werden.As according to the main patent can also be used according to the invention The same additives are added to impregnation solutions or precipitation baths will.
Vorteilhaft werden die nach vorliegender Erfindung verwendeten Pektinstofflösungen in einer Konzentration von 1/2 bis 5 % angewandt und neutral oder schwach alkalisch eingestellt, vorzugsweise auf einen p11-Wert 7 bis 9. Ausführungsbeispiel Ein Sack aus grobporigem Jutegewebe wird in eine 2o/eige Lösung von Pektin, denen p11-Wert ,durch Zusatz von Natronlauge auf 7 bis 8 eingestellt ist, getaucht. Anschließend wird der Sack 5 Minuten in einem Bad aus 25o/aiger Calciumchlo,ridlösung belassen. N achdem die Hauptmenge des Wassers abgetropft ist, kann der Sack mit bis zu 200° C heißem Bitumen gefüllt werden, von dem sieh der Sack nach Abkühlung leicht und sauber abläsen läßt.The pectin solutions used according to the present invention are advantageous Applied in a concentration of 1/2 to 5% and neutral or slightly alkaline set, preferably to a p11 value 7 to 9. Exemplary embodiment A sack coarse-pored jute fabric is converted into a 2o / own solution of pectin, which has a p11 value , adjusted to 7 to 8 by adding sodium hydroxide solution, immersed. Afterward the sack is left in a bath of 25% calcium chloride solution for 5 minutes. After most of the water has drained off, the sack can move up to 200 ° C hot bitumen, from which the bag looks slightly after cooling can be drained clean.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED11941A DE1008252B (en) | 1952-03-31 | 1952-03-31 | Process for covering packaging materials or the inner surfaces of casting molds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DED11941A DE1008252B (en) | 1952-03-31 | 1952-03-31 | Process for covering packaging materials or the inner surfaces of casting molds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1008252B true DE1008252B (en) | 1957-05-16 |
Family
ID=7033933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DED11941A Pending DE1008252B (en) | 1952-03-31 | 1952-03-31 | Process for covering packaging materials or the inner surfaces of casting molds |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1008252B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB443911A (en) * | 1933-09-07 | 1936-03-09 | Fruit Growers Exchange Ca | Improvements in or relating to food preservative means |
-
1952
- 1952-03-31 DE DED11941A patent/DE1008252B/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB443911A (en) * | 1933-09-07 | 1936-03-09 | Fruit Growers Exchange Ca | Improvements in or relating to food preservative means |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2146859C3 (en) | Process for the production of coatings from sugar on tablet cores containing medicaments | |
| DE1596579B2 (en) | PROCESS FOR COVERING GLASS SPRINGS BY USING AN APPLICATOR AND DEVICE FOR CARRYING OUT THE PROCESS | |
| DE1023448B (en) | Process for covering packaging materials or the inner surfaces of casting molds for masses that stick or soften under the action of temperature | |
| CH415446A (en) | Preservative wrapping and packaging material and process for its production | |
| DE1008252B (en) | Process for covering packaging materials or the inner surfaces of casting molds | |
| DE605890C (en) | Process to prevent undesired drying out of concrete, wood and other materials | |
| DE598426C (en) | Process for the production of webs of cellulose fiber masses used for decorative, covering, clothing or similar purposes | |
| DE642204C (en) | Process for achieving a surface finish on rubber goods | |
| GB723231A (en) | Process for the manufacture of packing materials for sticky masses or masses which soften under the action of temperature, and for the treatment of the inner surfaces ofcasting moulds | |
| DE420673C (en) | Process for producing foam for fire extinguishing purposes | |
| AT145834B (en) | Process for the production of goods with a refined surface. | |
| DE518195C (en) | Sizing process for yarns | |
| DE493758C (en) | Method of making a waterproofing mixture | |
| DE718123C (en) | Process for the manufacture of parchment tubes | |
| CH400718A (en) | Process for producing a boehmite layer on aluminum objects | |
| DE590067C (en) | Process for the production of high quality glue from bones | |
| DE747748C (en) | Process for bonding rubber or rubber substitutes to metal | |
| DE949238C (en) | Process for the transfer of urea solutions into solid, hard, uniform and storage-stable spheres | |
| AT241039B (en) | Glass articles with a protective layer, process for their manufacture and means for carrying out the process | |
| DE691679C (en) | Process for making low-smoke powder | |
| DE551549C (en) | Vulcanization of rubber | |
| DE846621C (en) | Production of foils with fabric covering for packaging purposes | |
| DE462077C (en) | Gastight fabric, in particular balloon fabric, made of impregnated fabric | |
| DE556191C (en) | Process for the production of rubber compounds | |
| DE624668C (en) | Application of glue solutions with or without the addition of elastic substances to fabric |