JPS6212332B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for producing bulky fibers, and more specifically to a ventilate-type bulky fiber processing apparatus used for producing bulky fibers using high-pressure fluid as a medium. The bulky fibers produced by this apparatus can be widely used in the fields of interior decoration such as carpets, wall coverings, and upholstery, clothing, industrial materials, and other fields.

A bulky fiber manufacturing device consisting of a yarn guiding nozzle, a ventilate section, and a bulking section has been known for a long time, but no device has been found that actively provides a turbulent flow chamber for ejected fluid connected to the ventilate outlet section. .
The area after the ventilate outlet is usually flat with no taper, or a type of tapered yarn storage tube is provided on the side opposite to the yarn guiding nozzle. This kind of conventional equipment is especially useful when bulking fibers that are multifilament aggregates (even when they are single fibers, especially when they are thermoplastic synthetic fibers). Since the filaments (usually several hundred to several thousand deniers) are sufficiently thick (usually several hundred to several thousand deniers), the pushing effect of the high-pressure fluid cannot be fully utilized, resulting in coarse crimp. Furthermore, it has drawbacks such as the generation of giant loops and the fact that only products with non-uniform bulk and high performance can be obtained. When such fibers are made into a final product, such as a tufted carpet,
The texture lacks flexibility and becomes rough and hard, and the pile surface is uneven and fuzz often occurs. Furthermore, during tufting, large loop-like fibers may get caught on the neighboring needles, which further deteriorates weaving performance and prevents the surface of the woven carpet from being finished neatly.
It had serious drawbacks such as: The apparatus of the present invention can be used to process fibers of a multifilament aggregate (even single fibers can be applied when thermoplastic synthetic fibers are heated and a high-pressure fluid is used as a medium). After the fibers are separated into single fibers with a small diameter, they are forced into a bulk fixing chamber using high-pressure fluid to convert the fibers into bulk, so that densely crimped fibers with excellent bulk can be obtained.

The outline and drawbacks of three known examples will be explained.

In the device of Japanese Patent Publication No. 37-11274, as shown in Fig. 4, the taper of the ventilate outlet of the turbulent flow chamber is tapered to the opposite side of the yarn guiding nozzle (not shown in Fig. 4). Disturbance of the ejected jet flow is insufficient, and a product with excellent bulkiness cannot be obtained. The device of Japanese Patent Publication No. 13021/1973 has a ventilate outlet that is flat without a taper, and has better bulk and performance than the device of Japanese Patent Publication No. 11274/1972, but its bulkiness is still insufficient. Tokuko Showa 50-
In the device No. 160547, the nozzle spout for guiding the yarn tapers toward the opposite side from the nozzle guiding port, and a gap is created between it and the ventilator inlet to create a kind of turbulent flow chamber. Separated filaments may clog the ventilate hole, and to solve this problem, it is necessary to further increase the pressure of the introduced fluid, which significantly reduces operability, and the resulting filaments It is also less bulky.

An object of the present invention is to provide a bulky fiber production apparatus that can economically produce fibers with excellent bulkiness at high speed.

The present invention relates to an apparatus for manufacturing bulky fibers using high-pressure fluid as a medium, in which a yarn-guiding nozzle and a ventilate outlet part of a ventilee main body are connected to each other, and a turbulent flow of an ejected jet flow having a diameter larger than the diameter of the ventilate outlet is provided. The turbulent flow chamber is composed of a ventilator main body having a chamber and a bulky fixed chamber connected to the turbulence chamber and capable of discharging high-pressure fluid, and the ventilator outlet part of the turbulent flow chamber is tapered toward the yarn guiding nozzle body. This is a bulk processing device equipped with.

The device and effects of the present invention will be explained in detail.

The thread guiding nozzle body 1 and the ventilate main body 9 are screwed together by a screw 5, and a gap 8 is formed between the nozzle ejection port taper 7 of the thread guiding nozzle body 1 and the ventilate fluid introduction port taper 12. It is possible to adjust the distance between them (although they do not necessarily have to be engaged in a threaded manner, it is convenient in practice).

The ventilate main body 9 has a ventilate outlet taper 19 tapered toward the yarn guiding nozzle body and is continuous with the inner wall 17 of the turbulent flow chamber 15 having a diameter larger than the diameter of the ventilate outlet 18. By adopting this structure, a turbulent flow increasing portion 16 is formed, and the turbulent flow chamber 1 is
The degree of turbulence of the fluid is increased in the filaments ejected together with the fluid in step 5, and the filaments imparted with conjugation properties by oil, twisting, etc., are easily separated into single fibers and become bulky.

Furthermore, when a heated high-pressure fluid is used as a medium, the thermal effect becomes sufficiently effective.

Uniform, bulky filaments without loops or fuzz can be obtained.

The taper 19 of the ventilate spout part is required to be tapered toward the yarn guiding nozzle 1 side, and the degree of taper is not particularly limited and may be curved.

The turbulence chamber wall 17 may have irregularities 24 such as annular grooves, dimple-shaped recesses, and recesses with irregular cross-sections.

The bulky fixed chamber connected to the turbulent flow chamber means that the fiber introduction port of the bulky fixed chamber 20 is in close contact with the turbulent flow chamber outlet 21' to prevent the fibers from getting caught in the turbulent flow chamber discharge port 21', and the bulky fixed chamber is connected to the turbulence chamber discharge port 21'. It is a cylinder with a structure that allows it to be separated.

For example, there are stainless wire meshes, brass wire meshes, stainless steel tubes with narrow openings, tubes of metal pieces arranged in a comb shape with minute gaps, and the like.

The exhaust device main body 20' is for discharging the high-pressure fluid separated in the bulky fixed chamber to the outside of the system, has an exhaust port 22, and may be connected to an exhaust blower.

The high-pressure fluid may be compressed air, high-pressure steam, or the like, and may be further heated to a desired temperature with a heater. Normally, high-pressure steam is used, and the pressure at the fluid introduction port 10 through a filter is 4 to 10 Kg/cm ² (in the case of polypropylene fibers).The temperature of the high-pressure fluid is not particularly limited, but the higher the temperature, the better the bulk and performance. do. It varies depending on the type of fiber, fiber diameter, processing speed, etc. (in the case of polypropylene fibers)
130-200℃).

Fibers include synthetic fibers, semi-synthetic fibers, natural fibers, etc., including various types, number of single fibers, and two or more types of fibers. Among thermoplastic synthetic fibers, it often refers to fibers consisting of multifilament aggregates (although it can also be used in the form of single fibers).

The fibers pass through the yarn guide nozzle hole 4 from the yarn guide port 2 of the yarn guide nozzle body 1, are combined with high-pressure fluid at the ventilate hole 14, are introduced into the turbulent flow chamber 15, and are introduced into the bulky fixing chamber 20 with flexibility. The fibers are deposited as a bulk of fibers, discharged as bulky fibers from the fiber discharge port 23, and then wound into a winder or the like to become a product.
The yarn guiding nozzle body 1 has a yarn guiding port taper 3 at the yarn guiding port 2, a nozzle jet port 6, a nozzle jet port taper 7, and a thread connecting portion 5 with the ventilate main body.
It has a structure in which the gap distance between the nozzle ejection port taper 7 and the ventilate fluid introduction port taper 12 can be freely changed in a screwed manner. The high-pressure fluid that has passed through the filter is introduced from the fluid inlet 10, passes through the fluid chamber 11, the cavity 8, the ventilate inlet 13, the ventilate hole 14, and the turbulence chamber 15, and is surrounded by a permeable tube 21 made of wire mesh, for example. The fluid exhaust chamber 2 is opened from the gap of the bulky fixed chamber 20
1". The ventilate main body 9 is connected to a turbulent flow chamber 15, and the turbulent flow chamber is further connected to a bulky fixed chamber 2.
0, and further connected to the exhaust device main body 20'.

The unprocessed fibers, especially when they are multi-fiber aggregates, are sufficiently opened into single fibers in the turbulence chamber, and are given firm crimp in the bulk fixing chamber.

FIGS. 2 and 3 show a case in which the turbulent flow chamber wall 24 has two annular recesses in the present invention.
If a bulky fixing chamber and an exhaust device body are attached to the main body having this structure as shown in Figure 1, and a bulky fiber is manufactured using the same process as shown in Figure 1, a fiber with excellent bulk and high performance will be obtained. I can do it. When manufactured using a conventional device not according to the present invention, for example, a device having a turbulent flow chamber 26 in which the taper 27 of the ventilate outlet shown in FIG. Only products with very poor bulk and performance can be obtained, and the crimp becomes coarse. Furthermore, a huge loop may occur, and other problems mentioned above may occur.

Example 1 Using the apparatus shown in Fig. 1, the thread guide introduction denier was
2500d/100 polypropylene fibers were introduced at a speed of 800m/min. The high-pressure fluid at this time was high-pressure steam, and the pressure at the fluid inlet was 5.5 Kg/cm ² . The gap distance was 0.25 mm. The bulky fibers discharged from the fiber outlet were wound into a winder. The obtained fibers had excellent bulk and high performance, and had uniform crimp with very little occurrence of giant loop fibers.
The yarn physical properties were strength: 2.03 g/d, elongation: 192%, elongation rate: 21.5%, and elastic modulus: 87.2%. When this fiber was woven into a tufted carpet with a pile length of 8 mm using a loop pile tufting machine with a 1/8 inch gauge needle, it showed good weavability and a clean pile surface with very little fuzz. A carpet was obtained. The texture was good with plenty of flexibility, and the covering property was also good. The stretching elongation rate and elastic modulus described in this example and Examples 2 and 3 were obtained by winding the obtained fiber into a strand of several meters, heat-treating it at 130°C for 30 minutes under no load, and using the following formula. Calculated.

Stretching elongation rate (%) = b-a/a x 100 Stretching modulus (%) = b-c/b-a x 100 where a: A load of 0.002 g/d is applied to the heat-treated fiber for 30 seconds. After marking a certain length of the sample, the length
b: A after 30 seconds after applying a load of 0.1 g/d after unloading
Length of trial length attached with c: After removing 0.1 g/d load, applying a load of 0.002 g/d, and after 30 seconds a
Indicates the length of the trial length attached.

Comparative Example 1.2 A device using the ventilator shown in Fig. 4, having a bulky fixed chamber and an exhaust device body similar to Fig. 1, under the same conditions as Example 1 (Comparative Example 1), and with a pressure of 7 kg/cm ² at the fluid inlet port. A bulky polypropylene fiber was produced at a fiber introduction speed of 500 m/min (Comparative Example 2).

In all of the comparative examples, there were a large number of giant loop fibers with poor crimp performance, and the fibers were coarsely crimped. The weavability of tufted carpet is very poor, with large loop fibers frequently getting caught in the needle, the weaving machine stopping frequently, and even the finished carpet product has a lot of fuzz on the pile surface and has a rough texture. It was hard and warm. As for the yarn physical properties, Comparative Example 1 has a strength of 2.01g/
d, elongation 181%, stretch elongation rate 11.4%, elastic modulus
59%, comparative example 2 has a strength of 1.85 g/d, an elongation of 164%,
The elastic elongation rate was 14.8%, and the elastic modulus was 74.6%.

Example 2 A ventilator main body having two annular grooves on the wall of the turbulent flow chamber as shown in FIGS. 2 and 3 was used, and the other parts were the same as in FIG. 1, and the fluid inlet pressure was 5.2
A bulky fiber was produced under the same conditions as Example 1 except for Kg/cm ² . A fiber with excellent bulk and performance, dense crimping, and few giant loop fibers was obtained. The yarn physical properties are
Strength 1.97g/d, elongation 188%, stretch rate 20.6
%, and the elastic modulus was 88.9%.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the bulking device of the present invention, showing the yarn guiding nozzle, the ventilate body, the bulking fixing chamber, and the exhaust device body, and Fig. 2 is the turbulent flow chamber wall of the bulking device of the present invention. a cross-sectional view of a ventilate body having a turbulent flow chamber with two annular grooves;
3 is a plan view of the pentuary main body shown in FIG. 2, and FIG. 4 is a sectional view of the pentuary main body of the conventional bulking device.

Claims (1)

[Scope of Claims] 1. In an apparatus for producing bulky fibers using a high-pressure fluid as a medium, a jet stream is connected to a yarn guiding nozzle and a ventilate jetting port of a ventilate main body, and has a diameter larger than the diameter of the ventilizing jetting port. It consists of a ventilator main body having a turbulent flow chamber and a bulky fixed chamber connected to the turbulent flow chamber and capable of discharging high-pressure fluid. A bulky processing device equipped with a flow chamber. 2. The bulk processing device according to claim 1, wherein the inner wall of the turbulent flow chamber has irregularities.