JPS6234844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spinning device for a sea-island composite fiber bundle having a special structure.

An object of the present invention is to obtain a fiber bundle having continuous changes in physical and chemical properties intermittently in the fiber axis direction.

Most conventional fibers, especially artificial fibers for knitting and weaving, have uniform chemical and physical properties in the fiber axis direction. However, the demands placed on fiber materials by the industry and users are extremely wide-ranging and diverse. Until now, fibers have been required to have as much uniformity as possible in terms of physical properties and structure, but now fibers have been required to be as uniform as possible in terms of their physical properties and structure. There was a growing demand for functionality.

The sea-island type composite fiber bundle of the present invention attempts to satisfy some of these requirements, and is a new type of sea-island type composite fiber bundle. In other words, it has a region in which the chemical and physical properties can be changed in the direction of the fiber axis.For example, by dyeing this fiber with a certain color,
When molded, the product exhibits a mélange-like color tone, has a unique lighting, texture, and feel, and has an effect that fully satisfies the tastes of modern people.

The gist of the present invention is as follows.

In an island-in-the-sea type composite fiber bundle spinning device, which has an inlet for spinning components that form a sea part and an inlet for a spinning component that forms an island part, and is configured by combining a joining chamber and a spinning nozzle, a. Each inlet is connected to a distribution plate having a plurality of holes for forming a flow of a plurality of components, and (b) the inlet of the distribution plate for the island-forming spinning component is provided above the joining chamber for the sea-forming spinning component. , C. A switch is rotatably provided in contact with the entrance side surface of the hole provided in the distribution plate for the island-forming spinning component, and d. The switch is provided in the distribution plate for the island-forming spinning component. an opening surface and a closed surface capable of intermittent flow of the spinning component are provided at a portion facing the hole formed in the spinning component; , the number of island component guide holes facing the nozzle is at least one, and the number of island component guide holes facing at least one nozzle is different from the number of island component guide holes facing the other nozzles. A sea-island type composite fiber bundle spinning device consisting of a combination of having a plurality of nozzles.

To explain the present invention in more detail, FIGS. 1A to 1D are model diagrams of a composite fiber bundle obtained by the spinning apparatus of the present invention (a cross section cut in half along the fiber axis direction). ) shows an island region 1 having tapered ends 3 and a sea region 2.

The sea-island type composite fiber bundle described in the present invention is a component region 4 that has physical and chemical properties different from the sea and has tapered ends in a sea consisting of a sea component region 4 that does not have both tapered ends. Islands consisting of islands are arranged intermittently in the fiber axis direction, and two or more sea-island composite fibers having different numbers of islands are bundled to form a composite fiber.

Next, tapered ends mean that when a sea-island type composite fiber is cut in the fiber axis direction, the area of each island gradually becomes smaller with no sea part existing in the surface occupied by the island. It refers to a shape that appears to change and eventually disappear.

The island portions having both tapered ends 3 may be surrounded by the sea on all sides and do not need to form a fiber surface, as shown in FIG. An island surrounded by a fiber may coexist with an island forming a part of the fiber surface, or any island may form a part of the fiber surface, as shown in Figure 1 C. .

In addition, as shown in Figure 1 D, sea-island type composite fibers with a large number of islands are made up of only islands surrounded on all sides by the sea, while sea-island type composite fibers with a large number of islands are surrounded on all sides by the sea. It may be composed of sea-island type composite fibers in which islands and islands forming the fiber surface coexist, and in a sea-island type composite fiber bundle, two or more sea-island type composite fibers with different numbers of islands are aggregated. It is not limited to the above example.

The arrangement of the island parts in the fiber axis direction is as shown in Figure 1 A and C. The sea part 4, which does not include any island parts, overlaps in all constituent single yarns, and the part consisting only of the sea part is the fiber. They may be arranged intermittently in a bundle, or they may be arranged alternately and overlappingly, as shown in Figure 1 B and D, so that islands are present in any cross section of the sea-island composite fiber. Good too.

Furthermore, the effect of the present invention was found when the length of the island ranged from 5 mm to 200 cm; when the length was less than 5 mm, the islands became connected to each other and it was difficult to maintain intermittentness.
When it exceeds cm, the melange effect is not sufficient.

The islands having both tapered ends may be adjacent to each other in a range where the island parts do not adhere to each other, and the cross-sectional shape of the island part may be any shape such as a circle, an ellipse, or a polygon. Further, the effects of the present invention are not impaired in any way regardless of the fineness and shape of the islands in the fiber axis direction.

The length of only the sea area shown in Figure 1 A and C is 1
You can choose from a range of mm to 200cm depending on the purpose and product. If it is less than 1 mm, it will be difficult to manufacture, and if it exceeds 200 cm, it will be difficult to obtain a melange-like coloring effect.

When bundling several sea-island type composite fibers with tapered ends and different numbers of islands, the melange-like coloring effect can be made even more vivid by aligning the sea areas shown in Figure 1 A and C with the fiber axis direction. be able to. In this case, as shown in Figure 1A, the length of the island part of the sea-island type composite fiber with a small number of islands may be shorter than the length of the island part of the sea-island type composite fiber with a large number of islands, or the length of the island part of the sea-island type composite fiber with a large number of islands may be the same. For example, when used for high piles, a shorter length is better, and the length may be adjusted depending on the purpose and product.

Furthermore, after crimping, it can be cut into short pieces and used as spun yarn to obtain a melange-like coloring effect.

The components of the sea-island composite fiber bundle used in the present invention are:
Any organic polymer having fiber-forming ability can be used. Vinyl polymers such as acrylonitrile polymers, polyamide polymers such as nylon 6 and nylon 66, polyester polymers, polyolefins such as polyethylene and polypropylene, polyethers, polyurethanes, polystyrene, ABS, and polycarbonate. etc. However, it is not limited to these.

The combination of the island component having both tapered ends and the sea component is determined by considering the use and purpose of the sea-island composite fiber bundle to be produced from the synthetic organic polymer,
The combination of these two component polymer substances is determined by taking into consideration the bonding state of the island portion. In other words, if it is necessary to strengthen the bond between each component of the sea-island type composite fiber to be obtained, a polymer suitable for this should be selected; conversely, it should weaken the bond between each component of the composite fiber. If it is better, it is necessary to select a suitable polymer.

The combination of these synthetic organic polymers must have different chemical and physical properties, and may be any combination of chemical composition, molecular orientation, physical strength, elongation, shrinkability, solubility in solvents, etc. For example, it is of course possible to combine components having the same chemical composition but different degrees of polymerization.

For example, when making the sea-island type composite fiber bundle of the present invention using wet yarn protection, a combination of a cationically dyeable acrylonitrile polymer as the island component having both tapered ends and an acidically dyeable acrylonitrile polymer as the other component, A combination of an acrylonitrile polymer as the island component having both tapered ends and a polyamide polymer as the other component is exemplified.

When produced by dry spinning, there is a combination of an acrylonitrile polymer as the island component with both tapered ends and a modacrylic polymer as the other component, and when produced by melt spinning, the island component with both tapered ends is polyester. A typical example is a combination of a polyamide-based polymer and a polyamide-based polymer as the other component.

Next, the spinning apparatus for the sea-island composite fiber bundle of the present invention will be described in detail.

FIG. 2 is a sectional view illustrating the main parts of a composite spinning apparatus for producing the sea-island type composite fiber bundle of the present invention. In the figure, the island component inlet 5 is located at the top of the pedestal 7.
A first distribution plate 10 , then a second distribution plate 12 , and then a nozzle plate 15 are integrally connected under the pedestal 7 by a holder 11 .

The island component spinning dope introduced from the island component inlet 5 passes through the island component distribution groove 8 formed at the lower part of the pedestal 7 and the upper part of the first distribution plate 10, and then passes through the second distribution plate 10.
It passes through the island component large guide hole 25 provided in 2, passes through a plurality of island component guide holes 16, and enters the nozzle 1 with the sea component spinning dope.
7, a plurality of islands are joined, and the island component introducing hole 1 is directly arranged at the bottom of the island component chamber 19.
6', it is extruded through the nozzle 17 together with the sea component spinning dope, one island is joined together, and then passed through a coagulation medium (usually an aqueous coagulation bath in the wet method, air cooling in the dry method, and air cooling in the melt method) to form sea-island shapes with different numbers of islands. It is considered to be a composite fiber bundle.

The sea component spinning stock solution is introduced from the sea component inlet 6, passes through the sea component distribution chamber 9, which is composed of the lower half of the pedestal 7, and the upper half of the first distribution plate 10, and is provided in the second distribution plate 12. A spacer 14 (usually a metal ring is used) is introduced into a sea component conduit 13.
In the joining chamber 20 configured through the island component introducing hole 16, both component spinning dope are merged and joined together so that the island component spinning dope extruded from the island component introducing hole 16 is enveloped in the sea component spinning dope, and then flowing from the nozzle 17. By extruding into a coagulation medium, it is possible to obtain sea-island composite fiber bundles having different numbers of islands.

The above-mentioned sea-island composite spinning and its apparatus are basically similar to conventionally known sea-island composite spinning techniques.

The island-in-the-sea type composite fiber bundle spinning apparatus of the present invention is characterized by being significantly different from the prior art in the following points.

That is, the island component spinning dope is stored in the island component chamber 1.
9, through the large island component introducing hole 25, through the plurality of island component introducing holes 16, and at the same time directly from the island component chamber 19 into the bonding chamber 20 through one or more island component introducing holes 16'. It is an essential requirement of the present invention that the inflow is intermittently interrupted by the vessel 21. Due to this interruption, the flow of the island component spinning dope forms a tapered end 3 at the time of joining with the sea component spinning dope, forming a desired sea-island type composite fiber bundle.

From the results of numerous experiments conducted by the present inventors, it has been confirmed that the intermittent supply of the island component spinning dope is most suitable at least immediately before joining the two components. Even if this intermittent supply is performed at or near the island component introduction port 5, the intermittency of the island portion is poor and it is difficult to obtain the island portion having both tapered ends.

The intermittent supply of the island component spinning dope can be carried out by various means. That is, a stopper, a baffle plate, or the like may be provided in the middle of the island component introducing hole 16 to intermittently interrupt the island component spinning stock solution passing through the island component introducing hole 16.

In the present invention, the large island component introducing hole 25 and the island component introducing hole 16 are opened and closed by the rotation of the switch 21, so that the island component spinning stock solution flow is intermittently supplied. .

The effect will be explained. The switch 21 has a disc shape and is attached to the lower end of the switch shaft 18 that passes through the center of the pedestal 7 and the first distribution plate 10 and reaches the island component chamber 19. The lower surface of the switch 21 is in contact with the island component large conduit hole 25 and the island component conduit hole 16, and at a position facing the same hole there is a blade 22 (FIG. 3) for opening and closing the same hole 25, 16, and a circular hole plate. (Fig. 4 1), rectangular hole plate (Fig. 4 2), other modified hole plates (Fig. 4 3,
4) etc., and by rotating the switch 21, the supply of the island component spinning stock solution is interrupted.

The switch 21 is rotated by a drive device (not shown) attached to the other end of the coaxial shaft 18. When a large number of sea-island type composite spinning devices are installed, the shaft 18 of each switch may be driven from the same drive source via a suitable transmission means such as a flexible shaft, belt, gear, chain, etc. They may be driven one-to-one from a driving source.

The upper ends of the island component introducing holes 16 may be passed through each independently, or may be gathered in the middle to form a larger guide hole and open to the island component chamber 19.

The state of collection of the island component introducing holes 16 can be changed depending on the arrangement of the island parts in the sea area. When arranging the islands so that they do not form the fiber surface,
The island component guide hole 16 is connected to the opposing nozzle stock solution conduit 23.
If the island portion forms part of the fiber surface, it may be placed so as to be located on the circumference of the nozzle stock solution conduit 23 or outside it. In a sea-island composite fiber or a sea-island composite fiber bundle, when island portions that form the fiber surface and island portions that do not form the fiber surface are mixed, the island component guide hole 16 is connected to the opposite nozzle stock solution conduit 23. It can be made by arranging it to be located inside and circumferentially or outside.

The tapered ends are formed according to the change in the opening area that is opened and closed by the overlap of the blade 22 of the switch 21 or the stock solution passage hole 26, the island component large guide hole 25, and the island component guide hole 16. .

For example, in the vane 22 of the switch 21 in FIG. 3, the large island component introducing hole 25 and the island component introducing hole 16 are fully opened, so that the island component spinning dope can pass through the maximum amount. Eventually, as the blade 22 rotates and overlaps with the inlets of the island component large inlet 25 and the island component inlet 16, the amount of the island component spinning dope decreases, and finally reaches zero when they completely overlap. Furthermore, the blade 22 rotates, and the island component large conduit 2
5. As the entrance of the island component inlet 16 is gradually opened,
The amount of the island component spinning stock solution passing through increases again from 0, and when the blade 22 leaves the island component large introducing hole 25 and the island component introducing hole 16, it becomes fully open, and the discharge of the island component spinning stock solution becomes maximum.

The position of the island part of each sea-island type composite fiber can be arbitrarily determined by changing the shape of each island component large conduit hole 25, the circle pitch of the island component conduit hole 16, the blade 22, the concentrate passage hole 26, and their positions. Can be adjusted.

For example, in the switch illustrated in FIG. 4, the inner and outer solution passage holes are shifted in the circumferential direction, so it is possible to obtain a sea-island type composite fiber bundle in which the positions of the island portions are shifted. In the intermittent supply of the island component spinning dope, the sea component spinning dope is constantly supplied, and the sea component spinning dope is constantly supplied to the joint part 2.
0 and flowing through the nozzle stock solution conduit 23, the island component spinning stock solution forms both tapered ends.
The sea-island type composite fiber bundle of the present invention is formed by encapsulating or joining the sea-component spinning dope.

When the island component introducing hole 16 forms a large diameter island component large introducing hole 25 from the middle, the island component introducing hole 16 connected to the island component large introducing hole 25 can change the flow rate of the same island component spinning dope. The fabric is raised to form a sea-island type composite fiber having a region consisting only of sea components as shown in FIG. A sea-island type composite fiber bundle having only a sea component region can be obtained by overlapping the sea-island type composite fiber.

The length, fiber diameter, shape, etc. of the island part 1 are the island component guide hole 1.
6, island component large guide hole 25, blade 22 of switch 21,
In addition to being adjustable by the shape of the stock solution passage hole 26,
By using the island component auxiliary groove 27 (FIGS. 4, 3 and 4) in combination, even more diverse adjustment of changes is possible. That is, by varying the width and length of the island component auxiliary groove 27, the tapered shape, length, and fiber diameter of the island portion can be varied in various ways.

Specifically, when the groove width of the auxiliary groove 27 is widened, the diameter of the island becomes thicker, forming a tapered tip 3 having an obtuse angle, but when narrowed, a long tapered tip 3 with an acute angle is formed. I can do it.

The island component guide hole 16 that communicates with the island component large guide hole 25 is
The individual island component large guide holes 25 may be different or may be the same. If they are the same, as shown in FIG. 2, the island component guide holes 16 are present at the same time, and a sea-island composite fiber bundle consisting of sea-island composite fibers having different numbers of islands is obtained.

The position and number of island component undiluted solution guide holes 16, and the combination with the island component large guide holes 25 are not limited to the above example, and may be changed depending on the application and product performance.

Next, examples of the present invention will be shown.

Example 1 Using a combination of ammonium persulfate and acidic sodium sulfite as a polymerization catalyst, polymerization was carried out at 55°C at the following monomer weight mixing ratio in water adjusted to pH 2.5 with sulfuric acid.
Polymerization was carried out for 5 hours to obtain a polymer.

: Acrylonitrile (hereinafter referred to as AN) = 100 : AN/methyl acrylate/sodium methallylsulfonate = 90/9/1 : AN/acrylamide/dimethylaminoethyl methacrylate = 80/10/10 Each polymer was thoroughly dried and heated at 0°C. , was dissolved at a rate of 25 g per 100 c.c. of 69% nitric acid aqueous solution to prepare a spinning stock solution.

The spinning dope of the polymer 1 was introduced into the island component inlet 5 of the spinning device shown in FIG. 2, and the spinning dope of the polymer was introduced into the sea component inlet 6 of the spinning device shown in FIG. 8 island component large holes each having 16 island component holes 16, and a second island component hole having 8 island component holes 16.
A distribution plate 12 was used.

The large island component guide hole 25 has a diameter of 5 mm, a depth of 3 mm, and includes five island component guide holes 16 with a diameter of 0.4 mm. The island component introducing hole 16 has a diameter of 0.6 mm.

The diameter of the nozzle 17 in FIG. Diameter 0.4mm, depth
It is 4.5mm.

The switch 21 has eight blades 22, and the width of the blades 22 is 10 mm at the position of the large island component guide hole 25 and 5 mm at the position of the island component guide hole 16.

This was rotated at a speed of 30 times/min, and the sea component spinning stock solution was supplied to the spinning apparatus at a rate of 1.6 cc/min and the island component spinning stock solution at a rate of 3.2 cc/min.

The spinning stock solution was coagulated in a 35% nitric acid aqueous solution at -2°C, thoroughly washed with water, stretched six times in boiling water, and then dried and heat-relaxed.

The sea-island type composite fiber bundle thus obtained was subjected to boil dyeing with 10% owf of Cevron Green B (registered trademark of dye manufactured by EI Dupont) at 100° C. for 60 minutes.

The obtained sea-island type composite fiber bundle exhibited a repeating change in color density from dark green to light green to white to light green with a period of approximately 8 cm.

Example 2 The polymer obtained in Example 1 was dissolved at 0° C. in a proportion of 25 g per 100 c.c. of a 69% nitric acid aqueous solution to prepare a spinning dope.

In place of the bladed switch 21 of the spinning device used in Example 1, the switch shown in FIG. Next, the spinning stock solution was introduced into the sea component inlet 6 and spun.

The undiluted solution passage holes 26 of the switch shown in FIG. Individuals are listed.

The switch 21 rotates at a speed of 40 times/min, and the sea component spinning stock solution is 1.2 cc/min and the island component spinning stock solution is 3.6 cc/min.
cc/min.

The spinning stock solution was coagulated in a 35% nitric acid aqueous solution at -2°C, thoroughly washed with water, stretched six times in boiling water, and then dried and heat-relaxed.

The thus obtained multifilament was boiled dyed with 10% owf of Cebron Green B at 100℃ for 60 minutes, thoroughly washed with water, and then dyed with acid dye CIAcid.
Boil staining was performed using Red 114, 1.0% owf at 100°C for 40 minutes at normal pressure.

The multifilament after dyeing had a periodic color tone change in the fiber axis direction from green to black to red to green, and the fabric knitted from this fiber had a melange appearance.

Example 3 14 g of polyethylene terephthalate with an intrinsic viscosity of 0.65 measured at 35°C in orthochlorophenol
minutes, intrinsic viscosity measured at 35°C in metacresol
1.20 nylon 6 was melt-spun at a rate of 4 g/min using the spinning apparatus used in Example 2 heated to 280° C. at a discharge temperature of 270° C. to obtain an 8-denier unrolled yarn. Thereafter, the film was stretched twice using heated rolls kept at 80°C to coat it with oil.

The fiber thus obtained is CIAcid Red.
114, boil staining was performed at 100°C for 60 minutes at normal pressure with 1.0% owf.

The obtained sea-island type composite fiber exhibited a melange-like coloration in which white, pale red, dark red, and pale red were repeatedly developed.

[Brief explanation of the drawing]

FIG. 1 is an axial cross-sectional view showing an example of the sea-island type composite fiber bundle of the present invention, FIG. 2 is a longitudinal cross-sectional view showing an example of the sea-island type composite fiber bundle spinning apparatus of the present invention, and FIG. 3 is A of FIG.
- A sectional view taken along line A; FIG. 4 is a top view showing an example of a switch. The symbols in the figure are as follows. 1: Island component region having tapered ends, 2: Sea component region, 3: Tapered end, 4: Region consisting of the sea component, 5: Island component inlet, 6: Sea component inlet, 7: Pedestal, 8: Island component distribution groove, 9: Sea component distribution groove, 10: First distribution plate, 1
1: Holder, 12: Second distribution plate, 13: Sea component conduit, 14: Spacer, 15: Nozzle plate, 1
6: Island component guide hole, 17: Nozzle, 18: Switch shaft, 19: Island component chamber, 20: Bonding chamber, 21: Switch, 22: Vane, 23: Nozzle stock solution conduit, 24:
Rotator bearing, 25: island component large guide hole, 26: stock solution passage hole, 27: island component auxiliary groove.

Claims (1)

[Scope of Claims] 1. A sea-island type composite fiber bundle having an inlet for a spinning component forming a sea part and an inlet for a spinning component forming an island part, and configured by combining a joining chamber and a spinning nozzle. In the spinning device, (a) both of the above inlets are connected to a distribution plate each having a plurality of holes for forming a flow of a plurality of components, and (b) the inlet of the distribution plate for the island-forming spinning component is connected to the sea-forming spinning component. (c) A switch is rotatably provided in contact with the entrance side surface of the hole provided in the distribution plate for the island-forming spinning component; (d) The switch is rotatably installed in the island-forming spun component. The distribution plate for the spinning component is provided with an open surface and a closed surface that can interrupt the flow of the spinning component at a portion facing the hole provided in the distribution plate for the spinning component, Component guide holes are provided, and the number of island component guide holes facing the nozzle is at least one, and the number of the island component guide holes facing at least one nozzle is equal to the number of island component guide holes facing the other nozzle. A sea-island type composite fiber bundle spinning device comprising a plurality of nozzles having different numbers of guide holes. 2 The rotation of the switch was installed on the spinning device stand.
A spinning device that provides the same rotation speed to a plurality of sea-island type composite fiber bundle spinning devices according to claim 1, which rotates from a rotating shaft of a book using gears, chains, flexible shafts, etc. 3. The spinning device according to claim 1, wherein the switch is rotated by a constant speed motor directly connected to the spinning device.