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Novel reinforced reaction injection molding (RRIM) processing: Computer‐controlled multiple‐stream RRIM production of interpenetrating polymer networks and polyurethanes
Author(s) -
Coates P. D.,
Johnson A. F.,
Armitage P. D.,
Hynds J.,
Leadbitter J.
Publication year - 1987
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760271602
Subject(s) - materials science , molding (decorative) , injection molding machine , polyurethane , one shot , composite material , raw material , polymer , production (economics) , mechanical engineering , engineering , mold , chemistry , organic chemistry , economics , macroeconomics
A four‐stream computer‐controlled reinforced reaction injection molding (RRIM) machine has been developed that attains high accuracy in dispense ratios throughout the injection period. This machine has been used for novel processing of polyurethanes, offering a route to varying product properties either throughout a shot or on a shotto‐shot basis. It also has been used for what appears to be the first production on commercial scale RRIM equipment of a polyurethane‐acrylic interpenetrating polymer network (IPN) in commercial cycle times of around 2 min.