JPS6143450B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blended yarn of splittable composite filaments that can be split into a special two-component mixed filament product of different sizes and shapes that provides a novel feel and appearance.

Traditionally, synthetic fiber filaments are physically strong and stable, and are homogeneous between fibers and in the fiber axis direction, making them suitable for making durable woven and knitted fabrics with extremely beautiful surfaces. They were in an advantageous position compared to natural fibers in terms of obtaining products. However, today, as clothing becomes more diversified and more fashionable properties are required, yarns with complex changes that are more like natural fibers are preferred over traditional plain yarns, with subtle color tones, textures, and appearances. The development of synthetic fiber filaments is desired.
However, there is no point in increasing the manufacturing cost of the yarn too much, and an important requirement is that the yarn can be manufactured stably within a range that is not far from the conventional level.

In view of this situation, the present inventor investigated composite fibers, and created fibers with as much fineness distribution as possible.
Furthermore, the inventors have discovered that a useful yarn can be obtained by making all the filaments have a non-circular cross section, leading to the present invention.

That is, the present invention consists of two polymers with poor affinity for each other, such as polyester and nylon, and one polymer is divided into two by the other polymer.
The gist is a mixed yarn of splittable composite filaments in which composite filaments with different numbers of divisions selected from composite filaments with cross sections divided into ~10 and arranged at rotationally symmetrical positions are mixed.
The present invention provides a mixed fiber yarn that can be made into a complex mixed filament product of different fineness and shape by peeling and splitting both polymer components through physical and/or chemical treatment.

1 to 4 are diagrams schematically showing cross sections of specific examples of composite filaments constituting the mixed fiber yarn of the present invention. 1 to 5 in each figure indicate cases where the number of divisions is 2 to 6, respectively, but the number of divisions up to 10 is also possible, and the mixed fiber yarn of the present invention is preferably two or more types from the composite filament group shown in each figure. is composed of three or more types.

Next, to explain the yarn of the present invention in more detail, the fineness composition varies depending on the purpose of use, but in order to make a fabric with a rich volume between thick fabrics, the maximum fineness of the filament produced by splitting is set to 10. It is best to set it to about denier (DE), and if you are aiming for relatively thin fabrics, it is best to keep it to a maximum of 3 DE. Furthermore, if you are aiming for an ultra-thin and highly flexible material, it can be used down to a minimum of 0.1 de. The composition ratio of fineness cannot be generalized depending on the application, but in order to create a sense of volume, it is preferable to emphasize the difference in fineness. 1 of 2 diagrams
There is a combination of cross sections of and 5, and it is better to mix the intermediate 2 or 3. Particularly when there is such a difference in fineness, if there is no intermediate fineness, one side may be emphasized in terms of texture, or large spots may appear in the color tone after dyeing, which is not preferable. In this sense, it is generally preferable that the composition ratio of the filaments after splitting be the same for all filaments in terms of weight, or a gentle normal distribution centered on intermediate filaments. Also, Figures 1 and 2
In the case of the cross section shown in the figure, a filament with a cross section having various protrusions with uniform fineness is produced, but it has a unique effect on the color tone and gloss of the fabric, and has bulkiness in terms of texture. . Furthermore, a marbling effect can be imparted by utilizing the difference in dyeing properties between the two components. To give a specific example, for example,
If the different fineness component is polyester and the irregular cross-section component with protrusions is nylon 6, the difference in color tone effect from polyester will be emphasized, and if the opposite combination is used, the hardness, waist, and bulkiness of polyester will be emphasized. can be emphasized. In this sense, as a generally versatile combination of polymers, one in which one is polyester and the other is nylon (nylon 6 or 66) is most preferred.

However, in a filament having the structure as described above, the effect of the irregular cross-section yarn with protrusions may be overemphasized, and it may be preferable that there is no morphological difference between the two components.
On the other hand, if composite filaments having the cross-sectional shapes shown in FIGS. 3 and 4 are mixed together, they can each have a similar cross-section and have a fineness distribution. The characteristic feature of this mixed yarn is that when the fibers are split, the two components are mixed more closely, resulting in a mixed filament product with an extremely fine marbling effect. However, the effects are essentially the same as those shown in the cross sections shown in FIGS. 1 and 2, and the considerations regarding the fineness range, fineness distribution, and applied polymer can be considered to be the same.

Next, a method for manufacturing the mixed fiber yarn of the present invention will be explained. FIG. 5 shows the composite flow forming part of the die device for obtaining composite filaments of the cross-sections of FIGS. 1, 3, and 4. FIG. In the upper part of the cap device, the A and B2 components are separately metered and dispensed and guided to the A component inlet 1 and the B component inlet 2. First, the A component enters the divided part 4, is divided by the segment discharge port 6, and reaches the upper part of the mouthpiece hole 9. On the other hand, the B component is similarly divided from the outside of the divided part 4 by the slit groove 5 and reaches the upper part of the mouthpiece hole 9, and is arranged alternately with the A component to form a composite flow. The bottom view of this divided part is shown in the sixth figure.
As shown in the figure, in this figure, the first, third, and fourth
In the figure, the A component is divided into four parts, corresponding to each case of 3. The slit grooves 5 and the segment discharge ports 6 are alternately arranged at equal intervals at rotationally symmetrical positions with respect to the center of the divided part 4. 3 is an upper plate, 7 is a lower plate, and 8 is a base plate.

The mixed yarn of the present invention can be obtained by preparing divided parts having slit grooves 5 and segment discharge ports 6 according to the number of divisions, and performing composite spinning using a spinneret equipped with two or more types of divided parts. At this time, by adjusting the discharge ratio of the two types of polymers, a composite filament of the type shown in FIG. For example, a hollow composite filament of the type shown in FIG. 4 can be obtained.

FIG. 7 shows a die apparatus for obtaining a composite filament of the cross-section shown in FIG. Basically the 5th
It is exactly the same as the cap device shown in the figure, but the divided part 4'
The structure is different and does not have slits. That is, the A component is dividedly introduced from the right angle direction directly into the B component flow path by the segment discharge port 6',
A multiple branched flow is formed in the divided parts and reaches the mouthpiece hole 9 as it is. Therefore, the introduction ports for the A and B components are different from those in the case of FIG. 5, and the A component is introduced from 1' and the B component is introduced from 2'. FIG. 8 shows a plan view of this divided part, and the segment discharge ports 6' are arranged rotationally symmetrically with respect to the center of the divided part 4', and the discharge ports can be provided according to the required number of divisions. good.
As for the arrangement of the various divided parts within the cap device, there are many possible examples, so they are not particularly illustrated, but it is not preferable to arrange them at random, and they should be arranged in uniform and symmetrical positions. be.

An important point for a spinning device is that each divided flow path is provided at a rotationally symmetrical position with respect to the center of the divided parts; otherwise, the yarn may bend during spinning and a stable operating condition may not be achieved. I can't hope. Conventionally,
When yarns of different fineness are spun from the same spindle device,
Differences in tension between each filament occur, causing problems such as sag during winding, and loops often occur during the drawing process, which is an extremely difficult situation. However, in the present invention, since the fineness of the composite filament before splitting is uniform, there is no such problem. Moreover, as mentioned above, the cap device only needs to be prepared with various divided parts, so it does not need to have a particularly complicated structure, and is extremely advantageous in terms of cost.

When the mixed fiber yarn of the present invention is produced by the method of spinning from the same spindle device as described above, a difference in the degree of orientation may occur between the filaments produced by splitting, which may appear as a difference in dyeability. Because it is in such good condition, there are no visible staining spots on the fabric, which actually has the effect of increasing the depth of the color.

Furthermore, differences in shrinkage occur between the filaments produced by splitting, and when subjected to heat treatment such as dyeing, the difference in shrinkage results in a product with high bulkiness.

It is also useful to use polyesters or nylons with special end groups such as sulfonic acid groups to emphasize tonal effects;
It is also possible to make one of them a sporadically deposited polymer. However, in this case, if care is not taken, both polymers may develop an affinity and the two components cannot be separated by ordinary physical or chemical treatment, and such cases are of course excluded.

Further, the method for manufacturing the mixed fiber yarn of the present invention may be carried out by the conventional method for manufacturing composite filaments in melt spinning using the spindle device described above. Although no special stretching method is required, spin-draw or stretch false-twisting methods can also be employed. Especially in the latter case, it is desirable to have a faster winding speed during spinning.
It is recommended that the speed be 2500m/min or more.

In addition, the method of using the mixed fiber yarn of the present invention is to subject the drawn yarn as it is to a weaving and knitting process, and before dyeing the fabric, peel and divide the two components by chemical treatment, or to physically apply such as false twisting to the mixed fiber yarn. After peeling and dividing the two components by applying a strong force, a fabric can be obtained by performing a weaving and knitting process. Furthermore, by raising the surface of the obtained fabric, it is also possible to make some of the filaments fluffy, which is a useful method.

Example 1 Polyethylene terephthalate with an intrinsic viscosity [η] of 0.55 was used as the A component, and nylon 6 with an intrinsic viscosity [η] of 1.0 was used as the B component and spun at a spinning temperature of 280°C using the spindle device shown in Figure 5. . In the cap device, the divided parts shown in Fig. 6 have two channels each.
A total of 9 pieces, 3 pieces each, 3 pieces, and 6 pieces, were arranged in order in a row on the same circumference. The spinning winding speed was 1800 m/min, and the A/B discharge ratio was adjusted to 3/3 so that the total fineness after drawing was 180 de.
The discharge amount was adjusted in step 2. As a result, Figure 1 1, 2,
A mixed fiber yarn containing three composite filaments each having three yarn cross sections of 5 was obtained. This undrawn yarn was wound around a heated roll at 85°C at a stretching ratio of 2.6 times.
It was stretched at 715 m/min. This yarn is made by Mitsubishi Heavy Industries LS
-Number of false twists at heater temperature 180℃/180℃ using type 6 false twisting machine
Two-stage heater false twisting was performed at 2000T/M and a speed of 150m/min. As a result, the two components were almost separated, and a processed yarn with high bulkiness was obtained. When this processed yarn was circular knitted with a 20 gauge Motsuku Milano rib structure and dyed, a fabric with a very voluminous feel was obtained. The other method is to use normal polyester 150de double twisted yarn as the warp, and after weaving this textured yarn into the weft in a flat weave, chemically treat it with an 8% aqueous solution of N-butanol at 120℃ for 30 minutes. did. As a result, the two components of the weft were completely separated by the shrinkage of the nylon, and then dyed, resulting in a beautiful fabric with a soft, firm color on the surface.

In this case, the filament structure consists of 18, 12, and 6 filaments of polyester with 2, 4, and 6 de, respectively, and 9 filaments of nylon with different protrusions of 8 de.

Example 2 The cap device was made in exactly the same way as Example 1, except that the divided parts were changed to those of the same type as in Example 1, and 24 pieces were arranged in a row on the same circumference in order.
The discharge ratio was set to 2/1, the discharge amount was adjusted to 75 DE after stretching, and spinning was carried out at a winding speed of 3000 m/min.
This yarn had cross sections 1, 2, and 5 in FIG. 3 each consisting of 8 filaments. This undrawn yarn was cold-stretched at a stretching ratio of 1.8 times, and then an interlock was knitted using a 28-gauge (circular knitting). When this knitted fabric was treated with N-butanol and dyed only on the nylon side in the same manner as in Example 1, it had a very high volume despite being a thin fabric.
A knitted fabric with excellent drapability was obtained and had a very fine marbled appearance. The composition of the filament in this case is that the polyester is approximately
48, 32, and 16 filaments each of 0.35, 0.70, and 1.05 de, and 48 each of nylon of 0.18, 0.36, and 0.54 de,
It has a similar wedge-shaped cross section of 32 and 16 filaments.

For comparison, when a similar composite filament (corresponding to 5 in Figure 3) was made into a fabric, it was too soft and lacked elasticity, lacking in practicality. Ta. Therefore, a comparison was made with a drawn yarn of 72 filaments of ordinary polyester 75de and a cross-knitted yarn, but in this case, although it had elasticity, the color tone effect was poor and it could not exhibit the characteristics like the mixed fiber yarn of the present invention.

Example 3 The undrawn yarn obtained in Example 2 was drawn and false-twisted at a draw ratio of 1.6 times using an FK-5 model draw-false twister manufactured by Barmarg, with a heater temperature of 180°C and a number of false twists of 3000T/M. . Two of the obtained textured yarns were twisted together to form a weft yarn, and a normal polyester 150de false twisted yarn was used as the warp yarn to weave with a weft stagnation structure. When the obtained fabric was dyed and then brushed, it became a fabric with a flannel-like soft surface and color tone.

[Brief explanation of the drawing]

FIGS. 1, 2, 3, and 4 are diagrams schematically showing cross sections of specific examples of composite filaments constituting the mixed fiber yarn of the present invention, and FIG. figure,
FIG. 4 is a sectional view of the composite flow forming part of the die device for obtaining the composite filament having the cross section shown in FIG. 4, FIG. 6 is a bottom view of the divided part 4 shown in FIG. 8 is a cross-sectional view of the composite flow forming part of the mouthpiece device for obtaining the
FIG. 9 is a plan view showing the shape of the die hole 9 for obtaining a hollow composite filament.

Claims (1)

[Claims] 1. Consisting of two types of polymers with poor affinity for each other,
The number of divisions between one polymer and the other is 2 to 10.
A mixed fiber yarn of a splittable composite filament, in which composite filaments with different numbers of divisions selected from composite filaments having cross sections divided at rotationally symmetrical positions are mixed. 2. The mixed fiber yarn according to claim 1, wherein the two types of polymers are polyester and nylon.