Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1979-02-14
1981-09-15
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 469, 264 54, 264 68, 264173, 2642093, 264DIG18, 2642096, 425113, 425817C, B29D 2700
Patent
active
042897165
ABSTRACT:
A blend of high and low density polyethylene and azodicarbonamid added as blowing agent is heated in an extruder to a temperature above the melting point of the high density component and fed to a shear head having a hollow rotating mandrel through which tubing is fed for depositing thereon a hose at the nozzle exit of the head. A peroxide is fed to the shear head for mixing with the polymer blend and immediately initiating crosslinking; blowing begins just prior to the depositing, the material being already crosslinked to a considerable extent.
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"Websters's New Collegiate Dictionary", Springfield, Mass., G. & C. Merriam Co., .COPYRGT.1961, pp. 91, 98, 138 and 139.
Whittington, Lloyd R., "Whittington's Dictionary of Plastics", Stamford, Conn., Technomic, .COPYRGT.1968, Preface, pp. 98, 155, 179, 180, 181.
"Wire and Cable Coaters' Handbook", First Edition, Wilmington, Del., E. I. DuPont de Nemours and Co., Inc. .COPYRGT.1968, pp. 13-22.
Anderson Philip
Kabel und Metallwerke Gutehoffnungshutte A.G.
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