BIODEGRADABLE CONJUGATE MONOFILAMENT AND ITS PRODUCTION

PURPOSE:To provide a biodegradable sheath-core conjugate monofilament having a certain heat-resistance satisfiable as a fishery material, agricultural material- and general industrial material and completely decomposable by microorganisms after use. CONSTITUTION:This biodegradable sheath-core conjug...

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Bibliographische Detailangaben
Hauptverfasser:	HIRANO MADOKA, MURASE SHIGEMITSU
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC MACROMOLECULAR COMPOUNDS SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To provide a biodegradable sheath-core conjugate monofilament having a certain heat-resistance satisfiable as a fishery material, agricultural material- and general industrial material and completely decomposable by microorganisms after use. CONSTITUTION:This biodegradable sheath-core conjugate monofilament is produced by using a polybutylene succinate as the core part and a copolymer of polybutylene succinate and polyethylene succinate at a molar ratio of 100/0 to 65/35 or 20/80 to 0/100 and having a melting point lower than that of the core polymer as the sheath part, melt-spinning the polymers through a spinneret having a circular sheath-core conjugate spinning nozzle, cooling the spun filament in a cooling water bath having a temperature lower than the crystallization temperature of the sheath polymer by 10-40 deg.C, subjecting the cooled filament immediately to multistage drawing in a hot water bath at a 1st-stage draw ratio of >=5 and =7 and carrying out the relaxed heat-treatment of the drawn filament in an oven.