JPH02442B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a spinneret for spinning ultrafine yarn.

Conventionally, in order to spin ultra-fine yarn, the yarn is spun using a spinneret with an ultra-fine spinning solution discharge hole, or the outer periphery of the yarn is covered with other components, and after spinning and drawing, the components on the outer periphery of the yarn are dissolved. There is.

By the way, it is not possible to make a spinneret with a spinning solution discharge hole of 0.01 mm or less because a spinneret with an ultra-fine spinning solution discharge hole cannot make a punch tool of 0.01 mm or less, The precision of the spinning solution discharge hole is poor because breakage, bending, abrasion, etc. occur, and the length of the spinning solution discharge hole cannot be made long. For example, if the spinning solution discharge hole has a hole diameter of 0.01, The length can only be around 0.01 mm, which is extremely short, and the spinning solution cannot be sufficiently restrained during spinning, resulting in uneven denier in the spun yarn.

In addition to processing problems, when using a spinneret with a hole diameter of 0.03 mm or less, impurities in the stock solution,
Hole clogging often occurs due to foreign objects.

The present invention was made to solve these problems, and it is possible to easily spin an ultra-fine yarn, and to spin a yarn with a required degree of ultra-fineness.
Moreover, it is an object of the present invention to provide a spinneret that has a simple structure and is easy to manufacture.

An embodiment of the spinneret according to the present invention will be described below with reference to the drawings. As shown in FIG. In the spinneret plate 4 having a large number of spinning holes 3, as shown in FIG. Spinning liquid guide rods 9, which are provided at intervals and have a small diameter middle part 7 shaped like a column and a lower part 8 shaped like a cone with a sharp tip, are fitted into each spinning hole 3 as shown in FIG. The upper part 5 is fixed to the large diameter upper part of the spinning solution introduction hole 1, and the middle high part 7 is arranged concentrically to form an annular passage 10 at the small diameter lower part of the spinning solution introduction hole 1 and the upper part of the spinning solution discharge hole 2. , the lower part 8 projects downward from the discharge surface 11 through the spinning solution discharge hole 2.

According to the spinneret 12 of the present invention having such a structure,
The spinning solution enters the annular passage 10 through each spinning solution inlet hole 6 provided in the circumferential direction of the large-diameter upper part 5 of the spinning solution guide rod 9 that is fitted and fixed in each spinning hole 3 . The spinning solution flows from the tip along the outer periphery of the conical lower part of the spinning solution guide rod 9, and is pulled out from the sharp tip to spin an ultrafine yarn.

Further, the spinneret 12 of the present invention has a spinning solution guide rod 9
By adjusting the area of the sharp tip of, for example, as shown in FIGS. 4a to 4c, or by adjusting the taper angle of the spinning solution guide rod 9, the degree of fineness of the ultrafine yarn to be spun can be adjusted. By using a spinneret 12 in which a spinning solution guide rod 9 with a required tip area and taper angle is set in advance, an ultra-fine yarn with a required degree of ultra-fineness can be obtained.

Furthermore, the spinneret 12 of the present invention has a spinneret plate 4
A spinning solution guide rod 9 is inserted into the spinning hole 3, and a large diameter upper section 5 having a spinning solution inlet hole 6 in the circumferential direction is fixed to the upper part of the spinning solution introduction hole 1, and a conical lower section 8 with a sharp tip is fixed.
Since it has a simple structure in that it only projects from the spinning solution discharge hole 2 to below the discharge surface 11, it has the advantage of being extremely easy to manufacture.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a spinneret plate in a spinneret of the present invention, FIG. 2 is a perspective view of a spinning solution guide rod in a spinneret of the present invention, and FIG. 3 is a spinning yarn of the present invention. FIGS. 4a, 4b, and 4c are longitudinal cross-sectional views of the principal parts of the spindle, and side views showing examples of changes in the sharp tip area and taper angle of the spinning solution guide rod. 1...Spinning liquid introduction hole, 2...Spinning liquid discharge hole, 3
...Spinning hole, 4...Spinneret plate, 5...Large diameter upper part of spinning solution guide rod, 6...Spinning solution inflow hole, 7...
Small diameter middle and high part of the spinning solution guide rod, 8... lower part of the spinning solution guide rod, 9... spinning solution guide rod, 10... annular passage, 11... discharge surface, 12... spinneret.

Claims (1)

[Claims] 1. In a spinneret plate having a large number of spinning holes consisting of a spinning solution introduction hole and a spinning solution discharge hole connected thereto,
Multiple spinning solution inflow holes are provided in the upper circumferential direction of the large diameter,
A spinning solution guide rod with a small diameter middle part shaped like a column and a lower part shaped like a cone with a sharp tip is inserted into each of the spinning holes, and the large diameter upper part is fixed to the upper part of the spinning solution introduction hole. are arranged concentrically to form an annular passage below the spinning solution introduction hole and above the spinning solution discharge hole,
A spinneret whose lower part protrudes downward from a discharge surface through a spinning solution discharge hole.