Abstract:
A melt spinning pack, comprising a pack case, and a spinneret having many spinning holes provided at the bottom of the case, a pack cap having a polymer introducing hole at the center provided at the top of the case and a flow arranging plate having many flow arranging holes provided between the spinneret and the pack cap, respectively contained in the case, said flow arranging holes having restricted portions reduced in cross sectional area compared to the inlets of the holes. It is preferable that the cross sectional area of the restricted portions of the flow arranging holes positioned in the peripheral region of the flow arranging plate is smaller than the cross sectional area of the restricted portions of the flow arranging holes positioned in the central region. It is preferable that the length of the restricted portions of the flow arranging holes positioned in the peripheral region of the flow arranging plate is longer than the length of the restricted portions of the flow arranging holes positioned in the central region.
Abstract:
A device and a method for manufacturing a thread line, the device comprising a spinning ferrule having a large number of spinning holes arranged therein in a straight line and a spinning tubes installed under the spinning ferrule at specified intervals and having filament passages with a longer-side directed in the arrangement direction of the spinning holes and a cross section formed in a rectangular shape; the method for manufacturing the thread line comprising the step of jetting gas from jetting holes for diagonally downwardly jetting the gas installed on both longer-side sides of the filament passages to filaments to arrange the large number of filaments in a row and to form air flow flowing down through the filament passage, wherein the velocity of the air flow flowing down through the filament passages is 60% or more of the receiving speed of the large number of filaments or gas produced from the large number of filaments is sucked and discharged to the outside of a system between the spinning ferrule and the spinning tubes, whereby even if the speed of the thread line is high, the thread line having a high extensibility can be provided.
Abstract:
A melt spinning spinning pack comprising a pack case, a nozzle plate stored in the case at the lower end of the case and having many nozzle holes, a pack lid provided at the upper end of the case and having a polymer introduction hole at the center thereof and a distributing plate provided between the nozzle plate and the pack lid and having many distributing holes, wherein each distributing hole is formed with a restriction portion having a cross-sectional area smaller than that at the inlet. It is preferable that a cross-sectional area of a restriction portion of a distributing hole be smaller at the outer periphery of the distributing plate than at the center thereof. It is preferable that a length of a restriction portion of a distributing hole be larger at the outer periphery of the distributing plate than at the center thereof.