JPS60104510A - Spinneret for spinning ultrafine multifilament - Google Patents

Abstract

PURPOSE:To enable the stable spinning of uniform ultrafine multifilament, by using a distribution plate furnished with plural distribution holes for receiving the polymer from the central introducing hole and branching and distributing the polymer radially to the nozzles. CONSTITUTION:The distribution plate 1 furnished with the distribution holes 3 to receive the polymer from one introducing hole 2, and to branch and distribute the polymer radially to the nozzles 4, is placed between the spinneret plate 7 and the straightening plate 6. The polymer passed through the straightening plate 6 is collected in the central introducing hole 2 of the distribution plate 1, distributed uniformly from the distribution holes to the nozzles 4, and extruded from the nozzles 4. The upper surface of the distribution plate 1 is preferably inclined toward the introducing hole.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an improvement in a spinneret for spinning ultrafine multifilaments having a single filament fineness of 1.0 denier or less.

[Prior art]

Ultra-fine multifilaments have recently attracted attention as materials for clothing suede, filters, etc., and attempts have been made to produce ultra-fine multifilaments using conventional melt spinning methods.

However, producing ultra-fine multifilaments using the usual melt spinning method requires advanced spinning technology, and it is particularly difficult to stably obtain ultra-fine multifilaments with a single fiber fineness of 1.0 denier or less. Ta.

In other words, in order to obtain ultrafine multifilaments using conventional melt spinning technology, it is necessary to either reduce the amount of discharged or use an extremely large number of filaments.
In either case, there were problems as described below.

For example, when maintaining the discharge amount above a certain level and increasing the number of filaments (if a conventional spinneret device is used, uneven distribution of polymer occurs in the center and outer periphery of the spinneret, resulting in a uniform yarn flow). It is difficult to stably spin the
Keeping the number of filaments constant and reducing the discharge amount (then,
Similar to the above problem, it is difficult for the polymer to flow around the outer periphery of the spinneret (and because the residence time of the polymer becomes longer, gel-like substances tend to form in the polymer flow path, resulting in more yarn breakage during spinning).

[Purpose of the invention]

It is an object of the present invention to provide a spinneret device that solves these conventional problems and can spin uniform ultrafine multifilaments in an extremely stable manner.

[Structure of the invention]

The present invention has one introduction hole in the center for introducing the polymer, and a plurality of distribution holes branching radially from the introduction hole and distributing the polymer to the plurality of discharge holes of the mouth plate. This is an ultra-fine multifilament spinneret apparatus characterized in that a distribution plate having a structure of the present invention is provided in contact with an upper surface of a spinneret plate.

The present invention will be described in detail below with reference to the drawings.
B) is a vertical side view of a conventional spinneret device for polyester fibers, in which (5) is the spinneret back, (7) is the spinneret plate, (4) is the discharge hole, and (6) is the rectifier plate. In order to obtain ultra-fine multifilaments using a spinneret device, although the discharge rate is small, the polymer pool is large, so the residence time becomes long, gel-like substances are likely to form in the polymer flow path (and the pressure distribution is affected). A distributed bed of such polymer is created and contributes to the output rate.

FIG. 1(B) is a plan view of the cap plate (7), and there is no particular restriction on the number of ejection holes, but for multifilament use, the number is generally 6 to 200.

FIG. 2 (0) is a plan view of the distribution plate of the mouthpiece according to the present invention, and (B) is a cross-sectional view thereof, in which the distribution plate (1) has one polymer introduction hole ( 2)
It also has distribution holes (3) that branch out radially from the introduction hole (2) and distribute the polymer to the discharge holes. There is no particular limit to the number of distribution holes, but it is generally 2 to 8.
, one distribution hole usually corresponds to a plurality of discharge holes in the mouth plate.

FIG. 3 is a longitudinal sectional side view of the spinneret device according to the present invention,
In the figure, the cap back (5), cap plate (7), and rectifier plate (6) are the same as those in Fig. 1, but the cap plate (7) and rectifier plate (6) The distribution plate (1) is installed between and in contact with the upper surface of the cap plate (7).

In such a nozzle, the polymer is once concentrated at the central introduction hole (2) from the current plate (6) to the distribution plate (11), then uniformly distributed from the distribution hole (3) to the discharge hole (4), and then It is discharged from the discharge hole (4).

The upper surface of the distribution plate (1) is preferably inclined toward the introduction hole (2) as shown in the figure.

〔Effect of the invention〕

According to the present invention configured as described above, the polymer pool is small and the residence time is short (so that gel-like substances are generated in the polymer flow path even under a low discharge rate, and uniform ultrafine multifilaments can be stably produced. It is spun into yarn, and its industrial value is extremely large.

[Brief explanation of the drawing]

Figure 1 (a) is a vertical side view of a conventional spinneret device.
Figures (cap l is a plan view of the cap plate, FIG. 2 (a) is a plan view of the distribution plate of the cap according to the present invention, FIG. 2 ←) is its sectional view, and FIG. 3 is a cap device according to the present invention. Figure 1~
In Figure 3, (1) is the distribution plate, (2) is the introduction hole, (
3) is a distribution hole, (4) is a discharge hole, (5) (5) is a cap back, (6) is a rectifying plate, and (7) is a cap plate. (6) Se f (a) (b) Blue 3rd - + 2 figure (a j (b)

Claims (1)

[Claims] It has one introduction hole in the center for introducing polymer,
Further, a distribution plate having a plurality of distribution holes branching radially from the introduction hole and distributing the polymer to the plurality of discharge holes of each mouth metal plate is provided in contact with the upper surface of the mouth metal plate. Multifilament spinning spinneret device.