Researchers at Bayer MaterialScience evaluated alternative blowing
agents in two commercial HCFC-22 blown foam systems for refrigerated trailers and entry doors.
Session 1 on markets and legislation will include the presentation, "Impact of regulatory developments on the demand for blowing
agents in foam," by Paul Ashford, Caleb Management Services Ltd.
The core blowing
simulation took less than one day of computer time.
Features: Injection unit has 5 or 10 cavities; blowing
wheel module has 2 molds; 5:1 ratio between injection and blowing
cavities; continuously turning extruder screw for melt homogeneity; low-cost tooling (shell molds, one set of tools).
With the phase-out of HCFCs imminent, the presentations in Session A on "Construction" will turn to practical issues involving alternative blowing
Custom-formulated concentrates for most thermoplastics can include a nontoxic blowing
agent for food-contact applications and can contain color and other additives.
Issues sessions will be held on the three ingredients for a highly productive workforce, product stewardship in polyurethane systems, respiratory protection, furnishings flammability, product quality, MDI/TDI emissions, blowing
agents, writing a technical paper, automotive OEMs and MDI/TDI transportation guidelines.
Cure ingredients and blowing
agents were added to the masterbatch on a 16" two roll mill.
Extrusion blow introductions include new fast-cooling technology that slashes cycle time and "tandem" blowing
that makes two bottles per parison.
Bekum will demonstrate tandem blowing
on a BM-406D continuous-extrusion shuttle machine making 8-oz HDPE single-serve milk bottles.