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Response surface optimization of the feed compositions of biodegradable packaging foams
Author(s) -
Peng Jinchyau,
Wei Kaishuen,
Lui WaiBun
Publication year - 2005
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/pts.706
Subject(s) - cushioning , die swell , materials science , response surface methodology , compressibility , composite material , composite number , polyvinyl alcohol , calcium carbonate , central composite design , extrusion , chemistry , chromatography , thermodynamics , physics
Response surface methodology (RSM) was used to analyse the effects of polyvinyl alcohol (PVOH) and calcium carbonate (CaCO 3 ) on the physical and mechanical properties (radial expansion ratio, bulk density, compressibility and spring index) of a biodegradable cushioning extrudate. A rotatable central‐composite design (CCD) was used to develop models for the objective responses. The experiments were run at 125°C with a feed rate of 27.8 l/h, screw speed of 215 r.p.m. and die diameter of 3.92 mm. Responses were most affected by changes in PVOH levels and to a lesser extent by CaCO 3 levels. Individual contour plots of the different responses were overlaid. An optimum radial expansion ratio of 3.39, bulk density of 0.065 (g/cm 3 ), compressibility of 32.27(N), and spring index of 0.906 were identified at 36% PVOH and 5% CaCO 3 . Copyright © 2005 John Wiley & Sons, Ltd.