JPS61289144A - Single twisted blended spun yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a single-twist blended yarn with a soft texture that can be piece-dyed to obtain a yarn-dyed unique color effect.

[Conventional technology] Cellulose M! Conventional heathered yarns using fibers are manufactured by blending fibers dyed in predetermined different colors or twisting yarns together. However, the heathered effect obtained by such a method is very monotonous, and has drawbacks such as not only a long manufacturing time but also a complicated process. Because of this situation, expectations are increasing for yarns that can be dyed in unique colors. In other words, yarn with a different color dyeing effect is a yarn that exhibits a uniform color tone at the yarn finishing stage, but has parts with different dyeability intertwined within it, and when piece-dyed, it becomes a mixed state of different color tones, that is, heather. It means a thread that exhibits a tone.

However, a blended yarn with such a unique color dyeing function has not yet been proposed and its development is awaited.Under these circumstances, the present inventors provide a blended yarn with the above-mentioned characteristics. After a lot of research, we have developed an acid-dyeable rim that chemically introduces cationic groups into cellulose fibers! l
(We came up with the idea of blending modified fibers with unmodified cellulose fibers, and thought that by doing so, we could obtain a blended yarn that would meet the purpose.

By the way, in producing the above-mentioned blended yarn, various methods can be considered as means for mixing the modified fibers and the non-machined fibers.

In other words, blended yarn is manufactured through the following steps: blending, pre-spinning, spinning, and yarn finishing, but the mixing process for modified fibers and non-modified fibers is (1) Raw cotton blending method, in which they are mixed at the raw cotton stage. ,(2)
(3) A sliver blending method in which modified m-fibers and unmodified fibers are individually subjected to a pre-spinning process to produce a sliver and then mixed, and (3) modified fibers and unmodified fibers are separately finished into yarn. A twisting blending method is considered in which the two are mixed at the twisting stage.

[Problems to be Solved by the Invention] However, in the case of the above (1) raw cotton blend, although it is possible to obtain a good blended state, the blending state of the fibers progresses too much, so it is difficult to obtain a good result by piece dyeing. The resulting yarn is in a so-called marbled state, making it difficult to achieve the desired unique color.Also, in the case of (2) sliver blending, the blending condition is almost good, but m# increases during the pre-spinning and spinning steps. Since the Is mix with each other and create an MR state, the unique color effect becomes poor. On the other hand, 3) In the case of twisted yarn blending, the yarns do not mix with each other, so a unique effect can be obtained sufficiently, but since the twisting of the single yarn is twisted, the texture becomes stiff, and the blended yarn It will make you look thinner.

As mentioned above, (1) raw cotton blend, (2) sliver blend, (3
) All of the twisted yarn blends have their own drawbacks, and it is impossible to obtain the desired different-color blend yarn.

Under these circumstances, the present invention aims to provide a single-twist blended yarn that exhibits an excellent unique color effect through piece dyeing and has a soft texture.

[Means for Solving the Problems] The single-twisted blended yarn of the present invention that achieves the above object comprises at least two types of cellulose-based staple fibers having different dyeability.
The gist of this is that each yarn is divided into sections and then mixed and spun with a real twist of a twist coefficient of 2.5 to 4.5.

[Function] As mentioned above, in obtaining the blended yarn targeted by the present invention, the problem is how well to blend at least two types of cellulose fibers with different dyeability, such as modified fibers and non-modified fibers. 0 In the present invention, we have conducted extensive research on this point and have decided to blend the yarns at the roving stage. In other words, the roving produced through the blending and pre-spinning processes has much better cohesiveness than sliver fibers, and is only heated in the spinning process before being finished as yarn, so it is difficult to form a fiber bundle. The added mixing effect is relatively small.

Therefore, when the rovings of modified staple fibers and unmodified staple fibers are aligned and heated in the draft in the spinning process, the fibers do not mix with each other and form modified fiber 1, as shown in Figure 1 (a). The unmodified fibers 2 are burned in an alternating manner. That is, when looking at the cross-sectional shape of the blended yarn, as shown in FIG.
As shown in Figure (c), modified fibers 3 and 4 and non-modified fibers 5
Therefore, by piece-dying it after yarn finishing, only the modified staple fiber portion is dyed, and a single-twist blended yarn having a different color effect can be obtained.

In the present invention, at least two types of cellulose staples tR1il having different stainability are anionized cellulose staple tR1il and anionized cellulose staple tR1il. Combinations of cellulose-based staple am, cationized cellulose-based staple am and unmodified cellulose-based staple fibers, combinations of 7-ionized cellulose-based staple fibers and cationized cellulose-based staple fibers, and non-repurchased cellulose-based staples. For example, combinations including m and 111 may be mentioned, and one or more types of each fiber may be combined.

Examples of the anionized cellulose fibers used in the present invention include cotton, hemp (linen, ramie, etc.), regenerated cellulose fibers,
Examples include fibers in which carboxylic acid groups have been introduced into polynosic fibers through carboxymethylation, phosphoric acid or phosphorous acid groups have been introduced through phosphonomethylation or phosphoric acid esterification, or sulfonic acid groups have been introduced into polynosic fibers. However, it is particularly preferable to introduce a sulfonic acid group. Examples of methods for introducing an aion group include (1) a method of intramolecular polymerization of an ethylenically unsaturated monomer containing an anionic group; (2)
A method of reacting an anionic group-containing reactive compound with cellulose fibers, (3) graft polymerizing or reacting a compound with a polymerizable or reactive group containing a functional group that can be converted into an anionic group onto cellulose fibers, and then converting the anionic group into an anionic group. Examples of how to change the information are given below. Examples of compounds used as anionizing agents include acrylic acid, methacrylic acid, and styrene sulfonic acid in method (1), chloromethylsulfonic acid and phosphoric acid in method (2), and polyepoxy compounds in method (3). , N-methylol acrylamide, glycidyl methacrylate, maleic acid, styrene and the like. Epoxy groups, double bonds, methylol groups, etc. can be easily sulfonated with acidic sulfites or sulfites.
Can be anionized. Furthermore, styrene can be anionized by sulfonating the aromatic ring.

Furthermore, monomers that produce a 7-ion group upon saponification can also be used. The step of converting into sulfonic acid may be performed immediately after the reaction of the compound, or may be performed at any stage after passing through various processes such as desizing, scouring, bleaching, and mercerization, but before dyeing.

The anionized cellulose fibers are not dyed with acid dyes, reactive dyes, direct dyes, etc., but only with basic dyes and cationic dyes.

Examples of non-modified (non-ionic) cellulose fibers include fibers such as ordinary cotton, hemp, and regenerated cellulose, which may or may not be mercerized, but cotton fibers and hemp, in particular, may not be mercerized. It is preferable to be there.

Examples of cationized cellulose fibers include fibers obtained by modifying the cellulose fibers described above with a cationizing reagent such as 3-chloro-2-hydroxypropyltrimethylammonium chloride or β,γ-epoxypropyltrimethylammonium chloride.

The unmodified cellulose fiber and/or the cationized cellulose fiber can be dyed with reactive dyes, direct dyes, acid dyes, etc., but not with cationic dyes.

In the present invention, when mixing the anionized cellulose-based staple fiber and/or cationized cellulose-based staple fiber with the non-number W cellulose-based staple fiber, the modified fiber accounts for 10-90% of the total, more preferably 25-90% of the total. It is desirable to blend the fibers in an amount of 75%; if the blending amount is out of the above range, the amount of modified fibers or non-modified fibers will be too large, making it impossible to obtain a satisfactory unique color effect. The characteristics of the above fibers include an average fiber length of 1.
A material having a diameter of 0 to 1.5 inches and an average fineness of 3.0 to 7.0 micronaires is preferably used. When blending such modified cellulose-based staple fibers and unmodified cellulose-based staple fibers, the twist coefficient should be 2.5 to 2.5.
It is necessary to twist so that the actual twist in the range of 4.5 is added. As a result, it is desirable to obtain a blended yarn having a thickness of English cotton count 5's to 200°S. Furthermore, if the twist coefficient is outside the above range, that is, if it is less than 2.5, fuzz increases.

On the other hand, if it exceeds 4.5, the different color effect becomes blurred, and the texture becomes hard.

[Example] Cationized cellulose fiber (ioo gelen/15 yards) and unmodified wire fiber! 1 (100 gels/15 yards) of staple fibers is processed using the apparatus shown in Fig. 2 (6 and 7 are shinomaki, 8 is a trumpet, 9 is a back roller, 10 is a middle roller, 11 is an apron, 12 is a collector, 13 is a is the front roller, 14 is the ring, 15 is the traveler 116
indicates pipe yarn, R1+R2 indicates roving, and Y indicates yarn.
) was used to produce a spun yarn with an English cotton count of 20°S at a draft of 32 times and a twist number of 15.8 (turns/inch). On the other hand, for comparison, sliver blended yarns made from the same combination of materials were woven into sheeting (plain weave) with a warp density (68 threads) x weft density (68 threads), and only cationized cellulose fibers were dyed. When the different color effect of each fabric was inspected by single-sided dyeing, the fabric according to the present invention showed a much better different color effect than the comparative example.

[Effects of the Invention] The present invention is configured as described above, and can obtain the effects summarized below.

(1) Since modified fibers or modified fibers and non-modified m#I are blended at the roving stage, spinning is carried out while maintaining a partitioned state between the two. Therefore, by piece dyeing, it is possible to obtain a blended yarn with an excellent unique color effect and a soft texture.

(2) In the case of yarn-dyed cotton, it is impossible to spin 100% cotton and synthetic fibers such as polyester must be mixed, but since the blended yarn according to the present invention is piece-dyed, it is possible to spin 100% cotton.
Can be spun at 0.00%.

Since there is no need to mix synthetic fibers, a product with a soft texture and excellent moisture absorption can be obtained.

[Brief explanation of the drawing]

Figure 1 (a) is a schematic diagram showing the blending situation of modified fibers and non-modified fibers, Figure 1 (b) and (c) are schematic diagrams showing the cross-sectional shape of the blended yarn, and Figure 2 is the blending device. FIG.

Claims (1)

[Claims] At least two types of cellulose-based staple fibers with different dyeability are each separated and have a twist coefficient of 2.5 to 4.
A single-twist blended yarn characterized by being blended with 5 real twists.