From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Sales leaflet describing the properties, grades, and applications of Paxolin insulation material.
| Identifier | ExFiles\Box 39\3\ Scan135 | |
| Date | 1st October 1920 | |
| Sales Leaflet. No. 5. X.3573. THE MICANITE & INSULATORS CO LTD PERFECT MICANITE INSULATOR REGISTERED EMPIRE WORKS. WALTHAMSTOW. LONDON. E.{Mr Elliott - Chief Engineer} 17. PAXOLIN INSULATION. "PAXOLIN" is an insulating material manufactured from paper and synthetic resin, the resin fulfilling the double function of cementing the layers of paper together and acting as an impregnating material, the paper acting as the "carrier" of the resin. The synthetic resin employed is a condensation product obtained from Phenol and Formaldehyde and possesses the property that while it can be prepared suitable for use as cement in a fusible and soluble condition, it may by suitable treatment be converted into a material which is infusible and insoluble, unaffected by ozone, oil, dilute acids or alkalis and also impervious to moisture. Such material therefore employed as a binding and impregnating agent with suitable paper enables the production of insulating material which is mechanically strong, has excellent dielectric properties and is of an extremely permanent character. One of the great advantages of PAXOLIN as compared to paper insulation built up with shellac, is its heat resisting properties. While shellac products tend to soften with heat, particularly in hot oil, PAXOLIN remains quite hard under the effect of heat, even in hot oil. In a dry heat the temperature may be raised until the material ultimately carbonises, but there is no softening. It is practically non-inflammable although it will eventually support combustion if brought into prolonged contact with a flame. Another point of advantage of PAXOLIN over shellac products is that while in common with all fibrous insulating materials it is not absolutely non-hygroscopic, it is very nearly so, and is not so readily physically damaged, in the presence of moisture, as shellac insulators on which the layers of insulating material may separate. PAXOLIN can be prepared in the form of sheet or tube and insulators may be manufactured in any desired shape, in some cases by moulding during the manufacturing process or more generally by machining after manufacture. The material may be turned, sawn, milled, drilled, tapped and threaded and will take a good polish, giving the surface that is so necessary for high tension work. PAXOLIN is manufactured in two grades, Standard and Admiralty. The latter contains a larger percentage of resin and is therefore stronger mechanically and more nearly non-hygroscopic. STANDARD QUALITY PAXOLIN is excellent material where the conditions are not unduly severe and very suitable for the manufacture of Insulating Washers, Bushes, Bobbins, Discs, Troughs, Channels, etc. For high tension work we recommend ADMIRALTY QUALITY PAXOLIN, which is specially suitable for use on high tension transformers and switchgear, especially under oil, in every shape and form from thin plate to large transformer cylinders and in the manufacture of bushings and terminals, both solid and condenser type. This grade should also be used where intricate machinery is necessary, particularly in the case of tubes and cylinders. Our Engineers are at your disposal. Send us your enquiries and let us help you to solve your High Tension Insulation Problems. Telegrams : "MYTILITE" 'PHONE, LONDON. Telephones : WALTHAMSTOW 738, 739, 942. Sales Department : MICANITE & INSULATORS Co., Ltd., "Empire Works," Blackhorse Lane, WALTHAMSTOW, E.17 G.B.-10/20. | ||