postformingn.
/ˈpəʊs(t)fɔːmɪŋ/, U.S. /ˈpoʊs(t)ˌfɔrmɪŋ/ Materials Science.
Reshaping of a plastic material on reheating after its initial forming or shaping; spec. shaping of a thermosetting plastic laminate carried out on reheating before setting is complete.
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society > occupation and work > industry > working with specific materials > working with rubber or plastic > [noun] > moulding plastics
preforming1931
injection moulding1932
compression moulding1940
transfer moulding1940
slush moulding1943
postforming1945
vacuum forming1946
drape forming1958
thermoforming1958
1945 Metals & Alloys 21 392/2 The term of post-forming is generally used to designate the procedure by which this material is formed after the laminations have been heat-set.
1945 Plastics 9 266/2 The first important reference to laminated plastics for hot post-forming was probably the announcement of ‘Micarta 444’ by the Westinghouse Electric and Manufacturing Co. of America.
1965 Encycl. Polymer Sci. & Technol. II. 53 To facilitate this postforming ability, a melamine-formaldehyde resin with an added plasticizer is used for impregnation.
1987 19th Internat. SAMPE Techn. Conf. (Soc. Advancem. Material & Process Engin.) 588/2 Due to the thermoplastic nature of these composites, subsequent application of heat and pressure permits reforming all or part of the structure if desired. This reshaping or postforming procedure cannot be accomplished with thermoset structures.
2003 Polymer Engin. & Sci. (Nexis) 1 Feb. 297 This method can improve impact behavior, enable postforming of laminates and improve the resistance to hydrolysis of MF materials.
This entry has been updated (OED Third Edition, December 2006; most recently modified version published online March 2022).
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n.1945