CROWN FIBREGLASS MANUFAC- TURE The manufacturing opera- tion of Crown starts by making molten glass and this is achieved by melting sand, limesthone and other
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suitable constituents in an enclosed tank or furnace by surface melting with Town gas, sometimes boosted with oil.
LIFT
OFFICE
STORE
PSLAGE
ENTRANCE
LOBET
DEPARTMENT
STORE
SOGA POURIS
FOOT
ROAD
MATHAR
Ground floor plan, Theatre Royal,
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Second floor plan.
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Resultant liquid glass runs along a canal (forehearth) and drops a a stream of glass into a rapidly rotating alloy steel dish something like a colander with many hundreds of small side vents. By centrifugal force the glass is thrown through these fine holes to form a fibre and is subjected to further heating whilst in flight to continue the attenuation process and to in- crease the fibre fineness. Fibres so formed have a diameter of approxi mately 0.00024".
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All these resultant fibres directed downwards on a travelling collecting conveyor and on their way down are sprayed with a phnolic resin. This resin has the charac- teristic sprayed with a phenolic This resin has the charac- teristic of producing a joining or welding of any two fibres at the point at which they cross and the elasticity of the fibres makes it possible for this network to be com perssed so that the air can be squeezed out but the mat will still recover to its original size so allow- ing the spaces containing the still air to resume their original function of insulation.
The new Crown material consists of all long fine fibres. It contains no shot, no dust, no fall-out, and, therefore, ensures pleasant handle- ability.
Previously, uniformly fine fibred, dust and shot-free insulants have been available only at many times the price of Crown, which is cheaper than many of the fibreglass products its replace and in all instances, offers economics both in storage and in application.
Not only does the compression packing reduce storage space but it reduces transport costs.
Its great resilience and tear strength permit speedy erection on exposed building sites and afford ad- vantages in the insulation of domes- tic appliances and in the wide field of transport.
BIGGEST MOSQUE IN AUS-, TRALIA A mosque of striking modern design is being built in Canberra the National Capital of Australia, by the Governments of Malaya, Pakistan and Indonesia.
THE HONG KONG & FAR EAST BUILDER — VOLUME 15, NUMBER 1
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