DE714638C - Process for the production of insulating material for electrotechnical purposes - Google Patents
Process for the production of insulating material for electrotechnical purposesInfo
- Publication number
- DE714638C DE714638C DES134005D DES0134005D DE714638C DE 714638 C DE714638 C DE 714638C DE S134005 D DES134005 D DE S134005D DE S0134005 D DES0134005 D DE S0134005D DE 714638 C DE714638 C DE 714638C
- Authority
- DE
- Germany
- Prior art keywords
- insulating material
- production
- calcium carbonate
- purposes
- electrotechnical purposes
- 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
- 238000000034 method Methods 0.000 title claims description 5
- 239000011810 insulating material Substances 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 4
- 229920003043 Cellulose fiber Polymers 0.000 claims description 3
- 230000000397 acetylating effect Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 239000002253 acid Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000021736 acetylation Effects 0.000 description 2
- 238000006640 acetylation reaction Methods 0.000 description 2
- 239000007900 aqueous suspension Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- HFNUUHLSQPLBQI-UHFFFAOYSA-N acetic acid;calcium Chemical compound [Ca].CC(O)=O HFNUUHLSQPLBQI-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Paper (AREA)
Description
Verfahren zur Herstellung von Isoliermaterial für elektrotechnische Zwecke Für verschiedene Zwecke bedeutet das hohe Wass:eraufnahmevermögen natürlicher Cellulosefaserni. -einen :großen Nachteil. Dieser kann bekanntlich durch teilweise Ver.estei-ung, insbesondere Acetylierung, wesentlich behoben werden. Hiernt werden die Fa.sierstoffe in der Regel mit .einer Acetylierungsflüs:sigkeit behandelt, die aus seinem Gemisch von Ess,igsäureanhydrid, Essigsäure und einem geeigneten Katalysator besteht, wobei die Behandlung so geführt wird, :daß die Struktur und Festigkeit :der Fäsern nicht leiden. Nach beendeter Acetylierung müssen die Reste der Aoectylierungsfüssigkeit aus den .Faserstoffen entfernt werden. Dies ist besonders wichtig bei solchen Faserstoffen, die als Isolierstoff für. elektrotechnische Zwecke Verwendung finden sollen, da etwa darin verbleibende Säurereste die dielektri.-schen Eigenschaften der Stoffe beeinträchtigen würden. In der Regel erfolgt die Reinigung durch Auspressen oder Ausschleudern und nachfolgendes Auswaschen.Process for the production of insulating material for electrotechnical Purposes For various purposes, the high water absorption capacity means more natural Cellulose fibers i. -a: big disadvantage. As is well known, this can be partly due to Stiffening, especially acetylation, can be substantially eliminated. To be learned the company usually treats the substances with an acetylating liquid which from its mixture of acetic anhydride, acetic acid and a suitable catalyst consists, the treatment being carried out so that: that the structure and strength : the fibers do not suffer. After the acetylation has ended, the remnants of the aoectylation liquid must removed from the fibers. This is particularly important for such fibers used as insulating material for. Electrotechnical purposes should be used because Any acid residues remaining in it affect the dielectric properties of the substances would affect. As a rule, cleaning is done by squeezing or Spin out and subsequent washing out.
Es wurde nun gefunden, daßeine rasche und gründliche Reinigung anacetylierten Faserstoftgutes aus natürlichen Cellulosefas:ern durch Behandlung mit .einer wäßrigen Aufschlämmung von fein verteiltem Caleiuincarbonat in der Wärme, zweckmäßig bei Siedehitze, nach mechanischerEntfernung des Großteiles der :anhaftenden Flüssigkeit aerzi;elt wird. Zwecks vollständiger Entfernung der Säurereste muß hierbei eine solche; Menge von Calciiimcarbonat angewandt werden, daß nach Abschluß des Auswasclivorganges das Wasser noch einen Überschuß von Calciumcarbonat !enthält und nicht sauer reagiert. Faserstoffbahnen, z. B. Gewebe oder Papierbannen, können aber auch fortlaufend durch kochendes Wasser, in dem das Calciumcarboalat aufgeschlänunt-ist, hindurchgezogen werden. Nach diesem Auswaschvorgang ist das hierbei gebildete essigsaure Calcium noch durch Auskochen in reinem Wasser zu entfernen.It has now been found that a quick and thorough purification anacetylated Fiber goods made from natural cellulose fibers by treatment with an aqueous one Slurry of finely divided Caleiuincarbonat in the heat, expediently at Boiling heat, after mechanical removal of the majority of the adhering liquid aerzi; elt is. In order to completely remove the acid residues, a such; Amount of calcium carbonate are applied that after the completion of the washout process the water still contains an excess of calcium carbonate and does not react acidic. Fibrous webs, e.g. B. tissue or paper banners, but can also continuously through boiling water in which the calcium carbonate is looped up, be pulled through. After this wash-out process, the resulting acid is acetic acid Calcium can still be removed by boiling in pure water.
Es ist bereits bekannt, die Auswaschung von aaetyli:ertem Fasergut mit verdünnten wä.ßrigen Alka:iläsungen vorzunehmen oder dasselbe mit wäßrigen Suspensionen von Magnesiumcarbonat zu behandeln. Bei Anwendung höherer Temperaturen besteht unter diesen Umständen aber "die Gefahr, däß das acetylierte Fasergut teilweise wiederverseift wird. Man muß sich daher mit der Anwertdung niedrigerer Temperaturen begnügen, bei denen aber auch bei längerer Einwirkung eine ausreichende Auswaschung nicht mit Sicherheit erzielt werden kann. Demgegenüber war nicht ohne weiteres zu erwarten, daß mit wäßrigen Suspensionen von Calciumcarbonat in verhältnismä£ig kurzer Zelt eine restlose Beseitigung der Säurereste aus dem amylierten Fmergut mit S>cherheit zu erzielen ist, und zwar ohne das Fasergut durch Verseifung anzugreifen.It is already known that aaetyli: ertem fibrous material is washed out to do the same with dilute aqueous alkali solutions or the same with aqueous suspensions of magnesium carbonate to treat. When using higher temperatures there is under under these circumstances, however, "the danger that the acetylated fiber material will partially re-saponify will. One must therefore be content with the evaluation of lower temperatures which, however, do not have sufficient leaching even after prolonged exposure Security can be achieved. In contrast, it was not to be expected without further ado that with aqueous suspensions of calcium carbonate in a relatively short time a complete elimination of the acid residues from the amylated Fmergut with certainty can be achieved without attacking the fiber material by saponification.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES134005D DE714638C (en) | 1938-09-25 | 1938-09-25 | Process for the production of insulating material for electrotechnical purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES134005D DE714638C (en) | 1938-09-25 | 1938-09-25 | Process for the production of insulating material for electrotechnical purposes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE714638C true DE714638C (en) | 1941-12-03 |
Family
ID=7539581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES134005D Expired DE714638C (en) | 1938-09-25 | 1938-09-25 | Process for the production of insulating material for electrotechnical purposes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE714638C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1191912B (en) * | 1954-11-25 | 1965-04-29 | Siemens Ag | Process for the production of low-temperature electrolytic capacitors using paper as a spacer |
-
1938
- 1938-09-25 DE DES134005D patent/DE714638C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1191912B (en) * | 1954-11-25 | 1965-04-29 | Siemens Ag | Process for the production of low-temperature electrolytic capacitors using paper as a spacer |
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