MELT SPINNING METHOD

• Main Authors: FUKUHARA MOTOTADA, NAKAMURA SHUSEI, TANIGUCHI MASAHARU
• Format: Patent
• Language: English
• Published: 05.04.1994
• Edition: 5
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

PURPOSE:To improve uniformity of flow of a discharged polymer by specifying a polymer discharge hole of a spinneret. CONSTITUTION:A polymer discharging hole is constituted of a flow-in part facing to the inlet of the polymer, a throttling part 4 and a discharge part 5 and diameters of the flow-in part, the throttling part and the discharge part are each made continuously smaller at angles of 0-3 degree, 20-50 degree and 3-20 degree to the center axis of the discharge hole. The ratio (L/D) of length L of a discharge part to diameter D of outlet of discharge hole is set to 1-10 and the diameter D is set to 0.1-0.5mm. The length (d) of chamfer of outlet part of discharge hole = (D-D')/2 is set to 3-30mum (D' is minimum pore diameter of polymer discharge hole).