news Resin cures by light
Engineering Design Guides
A new ICI resin-with-catalyst system, called 'lmpol' K that cures when exposed to a special bright light and stops when the light is removed has been added to the 'lmpol' range of unsaturated polyester resins which came on to the market in February of 1974.
Oxford University Press have published the first four of an extensive series of Engineering Design Guides: the series is being sponsored by the Design Council, the British Standards Institution and the Council of Engineering Institutions. The first four, titled 'Introduction to Fastening Systems'; 'Adhesive Bonding'; 'Miscellaneous Fasteners' and 'Rolling Bearings', form part of an initial set of sixteen: other titles in this set include 'The Use of Glass in Engineering'; 'Fatigue'; 'Selection of Materials' and 'Non-destructive Testing'.
Updated technical literature about Duraform asbestos reinforced rigid vinyl sheet is available from the manufacturers TBA Industrial Products, Rochdale, Lancashire (a subsidiary of Turner & Newall). Three new data leaflets describe different methods of fixing Duraform. Applications given include internal cladding and suspended ceiling panels, cladding in a cold store, and balustrades on a housing development.
'lmpol' K, it is claimed, will bring a number of advantages to the handling of unsaturated polyester resins. ICI say that it permits greater flexibility of workshop and production planning because the operator has complete control of when curing starts and when it stops. The greatest advantage is expected to be in traditional contact moulding, in both hand lay-up and spray lay-up processes widely used in the manufacture of boats, land transport and prefabricated building units: another application will be in the mechanical process of filament winding. ICI Ltd, Millbank, London SW1P 4QG
The stated aim of the series is to supply texts which are not only 'authoritative and useful' but which also 'convey information for the designing of particular products in a convenient form'. A prospectus for the series, and order forms, can be obtained from: Pam Solomon, Publications Department, Design Council, 28 Haymarket, London SW1Y 4SU
The leaflets (Ref RP/10/11/12) are available from: TBA Industrial Products, Reinforced Plastics Division, PO Box 40, Rochdale, Lancs, England OL12 7EQ
FRC saves money The University of Salford have announced a new composite concrete construction using fibrereinforced cement that, it is claimed, can result in savings of up
Kevlar 29 and 49 Fothergill and Harvey Ltd have introduced a range of fibre reinforcement materials using Du Pont's Kevlar 29 and Kevlar 49. The forms available are uni- and bi-directional woven sheets and pre-preg sheets: typical applications given by Fothergill and Harvey include lowstress aircraft panels, sporting goods and protective clothing. A data sheet, giving more details of the products, is available from Fothergill and Harvey Ltd, Summit, Littleborough OL15 9OP. Also available, from Du Pont, is their latest information bulletin on both Kevlar 29 and Kevlar 49, which again gives details of the uses of the fibres together with a summary of their properties. This information sheet is available from: Du Pont de Nemours International SA, Textile Fibers Department, 50--52 Route des Acacias, CH-1211 Geneva 24, Switzerland.
COMPOSITES. MARCH 1975
Fig.1 'Torayca', the carbon fibre made by Toray Industries Inc of Japan, was used to make the tone arm and head shell and to stiffen the speakercone (seealso Composites news, May 1974) shown above -- a new area of application for carbon fibres. Theseand other Torayca products were on show at the 5th International Fair of Plasticsin Tokyo last November