DE643591C - Process for the production of vulcanized fiber - Google Patents
Process for the production of vulcanized fiberInfo
- Publication number
- DE643591C DE643591C DED67677D DED0067677D DE643591C DE 643591 C DE643591 C DE 643591C DE D67677 D DED67677 D DE D67677D DE D0067677 D DED0067677 D DE D0067677D DE 643591 C DE643591 C DE 643591C
- Authority
- DE
- Germany
- Prior art keywords
- vulcanized fiber
- production
- parchment
- water
- vulcanized
- 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
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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/02—Chemical or biochemical treatment
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
Verfahren zur Herstellung von Vulkanfiber Die vollständige Entfernung der für die Pergamentierung bei der Herstellung von Vulkanfiber benutzten Chemikalien bietet große Schwierigkeiten, ist aber für viele Verwendungszwecke, , insbesondere in der Elektrotechnik, von großer praktischer Bedeutung. Selbst durch lange dauernde Behandlung mit den üblicherweise angewandten Waschwässern gelingt es nur sehr -ungenügend, die Pergamentierungsmitbel, beispielsweise Schwefelsäure ;oder Chlorzink, aus dem gewissermaßen aus @ein-er Vielzahl von Membranen bestehenden pergamentierten Material herauszuwaschen.Process for the production of vulcanized fiber Complete removal the chemicals used for parchment in the manufacture of vulcanized fiber offers great difficulty, but is suitable for many uses,, in particular in electrical engineering, of great practical importance. Even long lasting Treatment with the commonly used washing water is only very successful, the parchment agents, for example sulfuric acid; or zinc chloride, from the parchmented material, so to speak, consisting of a multitude of membranes to wash out.
Es wurde nun gefunden, daß die nahezu vollständige Entfernung der für die "Pergamentilerung benutzten Chemikalien sicher herbeigeführt werden kann, wenn man die in üblicher Weise bereits mehr oder weniger weitgehend gewässerte Vulkanfiber seiner Nachbehandlung mit kaltem oder vorzugsweise heißem, ielektrolytfrefem Wasser, z. B. mit destilliertem Wasser, Kondenswasser oder elektroiosmotisch gereinigtem Wasser, unterwirft. Besonders vorteilhaft ist ges, wenn. dieser nachträglichen Behandlung der Vulkanfiber eine an sich bekannte Behandlung mit solchen Stoffen vorangeht, durch die die Pergamentierungsmitbeloder ihre Umwandlungsprodukte neutralisiert bzw. leicht löslich gemacht werden. Als Beispiel für solche Stoffe sei das Ammoniak genannt, das in der Vulkanfiber evtl. noch vorhandene Reste von Schwefelsäure neutralisiert bzw. aus zur Pergam:entierung angewandtem Zinkchlorid bei der üblichen Art des Auswaschens gebildete, schwerer lösliche basische Zinkverbindungen, wie Zinkoxychloridoder basisches Zinkcarhonat, in leicht lösliche, komplexe Zinkammoniaksalze überzuführen vermag, die dann bei der nachträglichen Waschung mit reinem Wasser aus der Vulkanfiber herausgelöst werden.It has now been found that the almost complete removal of the chemicals used for "parchment filtering" can be safely brought about, if you use the vulcanized fiber, which is already more or less extensively watered in the usual way its aftertreatment with cold or preferably hot, electrolyte-free water, z. B. with distilled water, condensed water or electroiosmotic purified Water, subject. It is particularly advantageous if. this subsequent treatment the vulcanized fiber is preceded by a known treatment with such substances, through which the parchment agents or their conversion products are neutralized or be made easily soluble. Ammonia is an example of such substances called, which neutralizes any residues of sulfuric acid that may still be present in the vulcanized fiber or from zinc chloride used for parchment removal in the usual way of washing out sparingly soluble basic zinc compounds formed, such as zinc oxychloride or basic Zinc carbonate, able to convert into easily soluble, complex zinc ammonia salts, which are then removed from the vulcanized fiber during subsequent washing with pure water will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED67677D DE643591C (en) | 1934-03-13 | 1934-03-13 | Process for the production of vulcanized fiber |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED67677D DE643591C (en) | 1934-03-13 | 1934-03-13 | Process for the production of vulcanized fiber |
Publications (1)
Publication Number | Publication Date |
---|---|
DE643591C true DE643591C (en) | 1937-04-12 |
Family
ID=7059777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED67677D Expired DE643591C (en) | 1934-03-13 | 1934-03-13 | Process for the production of vulcanized fiber |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE643591C (en) |
-
1934
- 1934-03-13 DE DED67677D patent/DE643591C/en not_active Expired
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