Manufacture and application of a polyamide antiblock master batch

The invention relates to a compounding method of a polyamide antiblock master batch, which comprises incorporating 4-23 wt.% non-surface-treated, synthetic, amorphous silica into a carrier polyamide in a single extrusion pass, which is characterized by using a double-screw extruder with a processing...

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Bibliographische Detailangaben
Hauptverfasser:	MELILLO NICOLA, PFLEGHAR MARK, HAHN STEFFEN, TUOR GION ANTONI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention relates to a compounding method of a polyamide antiblock master batch, which comprises incorporating 4-23 wt.% non-surface-treated, synthetic, amorphous silica into a carrier polyamide in a single extrusion pass, which is characterized by using a double-screw extruder with a processing length of at least 40 times its screw diameter. The silica is fed to different zones of the extruder through at least two dosing sites, so that part of non-surface-treated, synthetic, amorphous silica is metered and added in the carrier polyamide, and one of the two dosing sites is a first side feeder.