GB449955A - Improvements in electric insulating materials - Google Patents
Improvements in electric insulating materialsInfo
- Publication number
- GB449955A GB449955A GB54635A GB54635A GB449955A GB 449955 A GB449955 A GB 449955A GB 54635 A GB54635 A GB 54635A GB 54635 A GB54635 A GB 54635A GB 449955 A GB449955 A GB 449955A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- acetic anhydride
- treated
- tannic acid
- hanks
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/185—Substances or derivates of cellulose
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The electric insulation resistance of animal textile fibres, particularly wool or silk or their mixtures, is improved by treatment with a tannic acid or with other agent capable of tanning leather, or with naphthol sulphonic acid, or with an acid chloride of an organic acid, or with an anhydride of an aliphatic carboxylic acid containing from 2--5 carbon atoms, or with a salt or oxide of a metal giving acid or amphoteric oxides, or with formaldehyde or paraformaldehyde. The material to be treated may be in the loose or in the form of hanks or cops or as fabrics or tape. In examples, wool in hanks is wetted out with hot water and treated with either formaldehyde solution at 80 DEG C. or tannic acid solution at the boil or a boiling solution of aluminium sulphate; alternatively the wool is dried and treated with a bath of acetic anhydride, acetic acid and zinc chloride at 40 DEG C., or with acetic anhydride alone at 80 DEG C., or with a bath of benzoyl chloride containing powdered chalk at 60 DEG C.; as a further alternative, the treatment with tannic acid may be followed by treatment with acetic anhydride; and in each case, after removal of the reagents by washing, the materials are dried for at least 3 hours at 110 DEG C. In other examples, silk in hanks is similarly treated with tannic acid, aluminium sulphate, acetic anhydride, or with tannic acid followed by acetic anhydride. Specification 271,948, [Class 36], is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB54635A GB449955A (en) | 1935-01-07 | 1935-01-07 | Improvements in electric insulating materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB54635A GB449955A (en) | 1935-01-07 | 1935-01-07 | Improvements in electric insulating materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB449955A true GB449955A (en) | 1936-07-07 |
Family
ID=9706257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB54635A Expired GB449955A (en) | 1935-01-07 | 1935-01-07 | Improvements in electric insulating materials |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB449955A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2424068A (en) * | 1941-03-21 | 1947-07-15 | Ici Ltd | Process for mothproofing furs |
US2534315A (en) * | 1947-12-13 | 1950-12-19 | Bigelow Sanford Carpet Co Inc | Treatment of wool to increase its harshness and fullness and to decrease its luster |
-
1935
- 1935-01-07 GB GB54635A patent/GB449955A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2424068A (en) * | 1941-03-21 | 1947-07-15 | Ici Ltd | Process for mothproofing furs |
US2534315A (en) * | 1947-12-13 | 1950-12-19 | Bigelow Sanford Carpet Co Inc | Treatment of wool to increase its harshness and fullness and to decrease its luster |
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