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New Zealand Listener, Volume 21, Issue 535, 23 September 1949, Page 4

Versatility a few moulded LCI plastics -garden hose , bathroom fittings as used on the Queen Elizabeth" and radio cabinet_ EROx TIDDLEYWNKS T0 TELEPHONES The lovely curves and shapes obtainable with moulded plastics have enabled designers to give beauty, as well as more durable utility, to many everyday products-_plus the greatly lowered costs of fast production. Most moulded plastics start off as moulding powders, which are based on two main types thermosetting and thermoplastic: The principal ther- mosetting powders are urea formalde- hyde and phenol for- maldehyde_ Th e S e powders are used for compression mould- ings and when sub- jected to heat and pressure flow and set into a solid infusible mass; which no amount of further heating will alter. Better products made fror powders ! Thermoplastic pOW- ders such as poly- thene, polyvinyl chlor- ide, cellulose acetate and a number of others are used for extrusion and injec- tion moulding, and when subjected to heat, soften, and on cooling become rigid: U r e a formaldehyde powders (thermoset- ting) give you the light colours; Pheno- lic (thermosetting) the dark colours. Products moulded from L.C.I. Thermosetting powders, "Mould- rite;' include radio cabinets, telephones, light switches, door knobs, etc., and from Thermoplastic powders ~combs, garden hose, elec- tric wire covering, brush backs, hairclips, toys, etc: Some of L.CIs 1[ Thermoplastics include Nylon, 'Welvic; "Diakon and Alka- thene_ Tenth of an informative series by IMPERIAL CHEMICAL INDUSTRIES (N.z ) LTD , makers of "Perspex; Nylon, 6 Alkathene; "Welvic; etc: ICI Pactica