Process for manufacturing multilayer pellets and use of the multilayer pellets
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United States of America Patent
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Dec 30, 2003
Grant Date -
N/A
app pub date -
Mar 1, 2000
filing date -
Jun 25, 1999
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Abstract
A process for manufacturing multilayer pellets having a core-sheath structure with a molding material forming a sheath which covers the outer circumference of another molding material forming a core, which includes (a) supplying the core material and the sheath material to a die extruder having multiple extrusion-forming parts arranged along a circumference, (b) extruding multiple multilayer strands from the extrusion-forming parts by covering around the outer circumference of the core material concentrically with the sheath material, and (c) cutting the extruded multilayer strands to manufacture multilayer pellets.
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