JPS626955A - Raised sheet and its production - 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 1] The present invention relates to a raised sheet made of core-sheath type microfibers and having a natural-looking color.

[Prior Art] High-quality wool products are extremely elegant and have a mild and calming feel. This is a color effect that comes from mixing wool dyed in several different shades of gold. This means that the more colors are mixed, the more natural and deep colors can be obtained.

On the other hand, techniques for obtaining similar effects have been provided in the field of artificial leather. For example, JP-A-50-116708
, JP-A-5-1-10668, etc. disclose this technique. Although these techniques are effective to a certain extent in obtaining simple marbled preparations, they also have the following drawbacks.

(1) Due to the use of different dyes (1/1 polymer), the color difference between the fibers is noticeable during dyeing, and the 1q color has a floppy marbled tone, giving it a deep, mild, natural color. 1*It is difficult to do.

(2) Due to redundant staining with isomeric dyes,
Dye contamination occurs on the other side, and the inherent coloring ability of the polymer cannot be fully utilized, making it impossible to obtain a substantial different color effect.

(3) When attempting to obtain a deep color, precipitation and aggregation of the dye added to one layer occur, making it impossible to obtain stable dyeing properties.

(4) Since it uses isomeric dyes, reduction washing or saw pinking is required depending on the number of dyes, which is disadvantageous in terms of cost.

(5) Because the stable adsorption temperatures of the dyes used are different, it is necessary to raise the temperature several times, leading to fiber deterioration or binder deterioration, and increasing costs due to longer dyeing time. It is disadvantageous.

Despite the many shortcomings mentioned above, the problem has remained unresolved.

[Problems to be Solved by the Invention] As a result of intensive study by the present inventors on an X′-noge sheet that does not have the above-mentioned drawbacks, has dyeing stability of ↑1, color development of 1 no., and has a natural-looking color, We have finally discovered the present invention.

E-problem solution] The gist of the present invention is as follows.

<1> An ultrafine fiber having a core-sheath type structure of 0.5 denier or less, the sheath component of the ultrafine fiber being a polyester copolymerized with 2.0 moles or more of 5-sodium sulfoisophthalate, A napped sheet in which the core component is composed of a sheath component and a polymer that completely covers the dyeability, and in which at least two or more types of ultrafine fibers having a core/sheath component ratio different by 5% by weight or more are mixed, and the napped sheet is A raised sheet characterized by a mixture of dark and light colors.

(2) At least two types of cores having an ultrafine core-sheath structure of 0.5 denier or less and having core-sheath component ratios different by 5% by weight or more, including a polyester copolymerized with 2.0 moles or more of 5-sodium sulfate small isophthalate as a sheath component. Spinning sheath-type ultrafine fibers,
1. A method for producing a napped sheet, which comprises forming a napped sheet of mixed fibers, and then dyeing the napped sheet with a cadion dye.

(3) Claim No. 2 in which the spinning is simultaneous spinning
) A method for producing the piloerection sheet described in item ).

The present invention will be explained in detail below.

The fiber denier used in the raised sheet of the present invention is 0.5
Denier or less, preferably 0.01 to 0.3 denier. If it exceeds this range, the texture of Sea 1- becomes hard, the surface touch is rough, and it is inconvenient to obtain a suede-like appearance.

The fibers used in the present invention are ultrafine fibers having a core-sheath type structure. The core-sheath type structure means one arranged substantially concentrically. Therefore, it does not include an eccentric core-sheath type structure for the purpose of obtaining a crimp effect or a silk-like luster. From the viewpoint of spinning stability and processing stability, the manufacturing method is generally obtained by forming a sea-island type composite fiber and dissolving and removing the sea component. For example, JP-A-54-11
A method such as that disclosed in No. 6417 is preferred. .

Combination of polymers forming a core-sheath structure 1! The sheath component is a polyester copolymerized with 5-sodium sulfoisophthalate in an amount of 2.0 moles or more (total acid content), preferably 113.0 moles or more. If the copolymerization ratio is less than 2.0 moles, it is inappropriate to change the dye adsorption balance due to the difference in core-sheath ratio and to obtain a difference in color development in Kaji A dye bath dyeing, which will be described later. The core component is not particularly limited as long as it has a dyeability different from that of the sheath component, but in consideration of the strength reinforcing effect of the sheath component, a homopolymer of highly polymerized polyester is preferably used.

In the present invention, in order to obtain a natural-looking, deep color, it is necessary that the core-sheath component ratios of the mixed fibers differ by 5% by weight or more.

5% by weight unvortexed O-C is unsuitable for producing a difference in shade, that is, a color difference, in the same color system.

In order to obtain the woolly and iris color feeling of a multicolored mixed wire, it is sufficient to mix two, three, or four types of fibers having the difference in core-sheath component ratio. Since it is not a combination of metachromatic polymers but a co-library polymer, it is possible to easily obtain ultrafine fibers with different core-sheath component ratios simply by preparing two types of polymers. In addition, in addition to the core-sheath type fibers, fibers having a thickness that does not change the texture by 1↓ or fibers that do not have a core-sheath structure are mixed at a proportion that does not give an extreme chroma to the color. It's okay.

The blending methods used in the present invention include a method in which ultrafine fiber staples are made separately and then blended together, and a blending method by simultaneous spinning. Although the former can have a wide range of mixed fiber ratios, the surface color mixture is rough, and it has a severe degree of marbling. ? This is an effective method if you are trying to

In addition, the latter simultaneous spinning and blending method includes
At least two or more spinnerets as described in No. 16417 are installed adjacently during spinning, and fibers with different core-sheath component ratios are simultaneously spun, and the fibers are bundled, mixed, and wound to form a mixed fiber staple. There are two methods: one method is to simultaneously spin m miscellaneous yarns with different ratios of core and sheath components using the same spinneret, and wind them up to form a mixed fiber staple.

) In the former case, the method for setting the kong fiber ratio may be such that the number of nozzle discharge holes through which fibers with different core/sheath component ratios are spun is set to a desired mixed ratio. in this case,
The fineness of the fibers having different ratios of core/sheath components spun from the die may be the same, and the effects of the present invention will not be lost even if the fineness is different. The method for setting the mixing ratio in the latter case may be designed so that the number of composite fibers having different core-sheath component ratios spun from the same spinneret reaches the desired mixing ratio. In this case, the number of island components (the number of components having a core-sheath type structure arranged in the sea component) in each composite 8M having different core-sheath component ratios may be the same or different. In short, the ratio of ultrafine core-sheath type fibers with different core-sheath ratios after removing the sea component may be set so that the mixed fiber ratio meets the objective. Furthermore, as a blending method using the same spinneret, a method of setting H1 so that the core-sheath ratio of each island component forming the core-sheath structure in the composite fiber M1 to be simultaneously spun becomes the desired blending ratio. But that's fine.

The fiber blending method used in the present invention is achieved by changing the means described above depending on the purpose and use. Among these, the co-spinning (combination) method is suitable for exhibiting the effects of the present invention.

The fiber blend ratio varies depending on the core/sheath ratio, the sheath component copolymerization ratio, the type of mixed AAI fibers, the color to be dyed, etc. - Although it cannot be determined generally, although the entire fiber is dyed in the same color system with differences in shade, To obtain a deep, calm, and mild color, for example, if the two types of fibers are mixed, the blend ratio is 70/30.
A range of 30/70% by weight is preferred. In addition, in the case of three types of mixed fibers, the blend ratio of the fiber with the highest sheath component ratio and the binding cord with the lowest ratio should be in the range of 70/30 to 30/70 weight percent, based on the total weight of these two types of fibers. , =b It is preferable to mix the other fiber in a range of 10 to 30% by weight in order to obtain a milder, natural-looking color than the color of a two-type mixed fiber product. On the other hand, the colors in the conventional technology are mainly marbled-like colors, and
1 or (51 is said to be "heli-toned". The former IJ
The latter is mainly dark colors mixed with a little light color, and the latter is mainly light colors mixed with a little dark color -b, which had some effect. However, when trying to obtain natural-looking colors that are deep and free from bling, which is a feature of the present invention, using conventional techniques,
For example, when blending fibers of the same color with slightly different colors into J, which is mainly a dark color, the dye types are different because they all use different dye 14 polymers, and when dyeing in the same bath, the dyes on the high concentration side will agglomerate, The disadvantages are that precipitation occurs, dyeing stability is poor, Hakata fibers are contaminated with dye Fl, and the color development 141 inherent in the polymer cannot be fully utilized.

Furthermore, if three or four types of polymers are mixed together, not only will the above-mentioned defects occur, but it must be said that it is completely impossible from an industrial perspective in terms of operational stability, economic efficiency, etc. become. However, according to the present invention, these problems can be solved all at once.

The napped sheet in the present invention is a fiber sheet made of nonwoven fabric, woven or knitted fabric, or a combination thereof,
It has piloerection. Various known techniques can be used to make the napped sheet, and there are no particular limitations. Raising means include sandpaper, sand cloth, sand net, whetstone, steel brush, polishing brush, sand roll,
The means may be selected depending on the condition of the sea 1.Furthermore, the method also includes means that generate raised hair in the spirit using liquid flow pressure or a grindstone in the dyeing machine.Also, The napped sheet may be subjected to heat treatment, gluing, ultrafine treatment, and binder application depending on the purpose.The order of these steps is not particularly limited.

The dyeing method used in the present invention is a bath dyeing method using cationic dyes. The conventional dyeing method for obtaining a marbled nap sheet requires a different dye because it is a combination of different polymers, and it requires a different dyeing method to prevent sedimentation of dyes and to prevent mutual contamination of dyes.
Due to such problems, although it is called a -bath dyeing method, it is necessary to raise the temperature in the same bath several times to the temperature required for adsorption of the dye used (1), and reduction washing and cleaning depending on the type of dye.
Soaping was required several times. Further, even if these means are used in combination, they interfere with each other and have no sufficient effect. However, in the raised fiber mixed fiber sheet of the present invention having a core/sheath component ratio, the raised sheet is dyed in a different color by one dyeing with the same stretch cut A dye in the same bath at the same temperature, This solves all of the problems at once. Normally, if the polymers have the same dyeability and the same dyeing seat, there will be no difference in color development in ultra-fine 8tiU of 0.5 denier or less due to the synergistic effect of the undyed core component polymer and the difference in sheath thickness. Although it is thought that it is difficult to obtain a unique color effect, it has surprisingly been found that by adopting the structure of the napped sheet of the present invention, a unique color effect having a wool-like, mild natural feel can be obtained. As a test based on conventional thinking, for example, a raised sheet using fibers with different ratios of sheath components that make up the raised sheet was independently dyed under the same conditions using the same bath ratio and the same concentration of the same type of cationic dye. In this case, it is certain that although the color development '1 no 1 of each is somewhat different, the color itself is not that different.

Therefore, it is expected that no difference in color will occur even if materials with different sheath ratios are dyed in the same bath. However, when such napped sheets are dyed in the same bath and at the same concentration, an unexpected large difference in color development occurs, and it is found that the colors themselves are different.

As a result of various studies, the reason for this is that the dye adsorption rate of polyester having -8O3N8 groups shows very little decrease even at high concentrations.On the contrary, the slight imbalance in the amount of dye adsorption and adsorption rate is caused, resulting in poor color development and color tone. It is conceivable that the results would be different. Therefore, the important point 1 of the present invention is how to incorporate these factors into the napped sheet. This unexpected effect occurs when the copolymerization ratio of 18O3Na groups in the sheath component polymer is 2.0 mol or more, preferably 3.0 mol or more, and in a mixed fiber state in which the sheath component ratios are far apart. J: Effectively demonstrated.

In the present invention, a mixture of dark and light colors means a mixture of fibers of the same color but with different degrees of color development.

In the present invention, the natural-looking colors are not the conventional floppy, marbled toned colors that have a distinctly different color effect, but the mild, deep six-color colors that are a mixture of fibers of the same color but with different degrees of color development. It refers to something that has an effect.

Next, examples according to the present invention will be shown, but the present invention is not limited or restricted by these examples.

[Example] Example 1 The following two kinds of thi island type stable polymer arrays each having a core-sheath structure were sold at a unit price.

■ Stable (T) Island component (sheath component-8): Copolymerized with 2.43 moles of 5-sodium sulfoisophthalate (total acid content), polyethylene terephthalate with intrinsic viscosity of 0.58.

Island component (core component-B): Poly JTI ethylene terephthalate-1 with intrinsic viscosity of 1.15
fart.

Sea component (C): Polystyrene component ratio: A/B = 80/20% (A/B)/C = 57/43% 111i fiber denier: Approx. 3.8 d Fiber length: Approx. 51 mm Number of crimps: Approx. 13111/ i n ■ Staple (n) △/B=50150% (unless otherwise specified, simply indicate the percentage)
, and this is a staple formed in the same manner as staple (I).

The weight ratio of these two types of staples was adjusted to staple (I〉/stable (1) = 70/30%), put on a card cloth wrapper, and then needle punched. Fells 1 to 1 having a basis weight of /Tr12 were obtained. This sheet (b) was passed through boiling water to shrink, nipped in a mangle, and dried in hot air.The sheet was then washed with trichlene and dried in hot air to form an ultrafine fiber sheet with a basis weight of 210 CI/W12.

This sheet was dyed blue with a cationic dye. In this way, the dyed product is dyed with the same type of dye at the same bath temperature at the same temperature, and after undergoing the dyeing process - times, the dyed product has an overall nacho-coloured color with a mix of different blues in deep blue, and a soft texture with a 16-color texture. It was a raised sheet.

Example 2 Using the same staple as in Example 1, the cotton was mixed at a blending ratio of staple (I)/stable (IT) - 30/70%, and then processed in the same manner as in Example 1. An ultrafine fiber sheet with a basis weight of 220 g/Tr12 was obtained.

This sheet was dyed green with a cationic dye.

In this way, the dyed product obtained in one dyeing process using the same type of dye in the same bath at the same temperature has a deep and vivid color that is a mixture of pale green and different darker greens. It was a soft raised sheet.

Example 3 Using the same core component (B) and sea component (C) polymer as in Example 1, only the sheath component (A) was copolymerized with 5.0 mol of 5-sodium sulfoisophthalate (total acid content). The following staples were prepared using polyethylene terephthalate having an intrinsic viscosity of 0.63.

■ Staple (I) component ratio: A/B=80/20% (A/B)/C=57/43% ■ Staple (TI) component ratio: △/B=50150% (Δ/B)/C= 57/43% ■ Staple (III) Component ratio: A/B = 10/90% (A/B)/C = 57/4.3% The fiber denier of each staple is approximately 3.8 d, the cut length is approximately 51 mm, It was processed to have a crimped number of 12111/irl.

These staples have a cotton blend ratio of staples (1>/
(TI)/(III) -60/10/30% cotton was mixed. Thereafter, the same processing as in Example 1 was performed to obtain an ultrafine fiber sheet with a basis weight of 2600/TIT2. This sheet was dyed violet with a cationic dye.

In this way, the dyed product is dyed once using the same type of dye in the same bath and temperature, resulting in an elegant, mild and deep color that is a mix of three different shades of violet without any bling or lint. It was a soft raised sheet with a texture.

Example 4 The same staples and cotton blend ratio as in Example 3 were used, and after the cotton was opened, needle punching was performed to obtain felt with a basis weight of 590 g and 7.2. Next, it is subjected to shrinkage treatment and dried in hot air.
A sheet with a fiber density of 0.365 g/- was obtained. This sheet was impregnated with polyvinyl alcohol in an amount of 23 parts per fiber, dried in hot air at 130°C, and then immersed in trichlene to remove polystyrene. Thereafter, it was impregnated with DMF polyurethane in an amount of 45 parts per IAIM, and wet-coagulated. Then in warm water II
RDM ", perform polyvinyl alcohol treatment,
Dry in hot air. This composite sheet was cut into approximately equal halves using a slicing M/C. The surface opposite to the sliced surface of the half-cut sheet was puffed with sandpaper to obtain a gray fabric having a basis weight of 230 CI/m2.

This gray fabric was dyed brownish using cadion dye. In this way, the dyed product is dyed once using the same type of dye in the same bath at the same temperature, and has a suede-like surface touch with a calm, mild, natural-looking color that is a mixture of three different shades of brown. It was a raised sheet with a texture.

Example 5 The following two types of caps (T) and (II) were placed adjacent to each other,
The same polymer shown in Example 3 was co-spun and spun. Such mixed fiber yarns are drawn in a liquid bath to produce two types of staples (1) and (I) with different core-sheath ratios as shown below.
A staple with mixed fibers was obtained.

= 19- ■ Type of cap - After processing the mixed fiber staple described in
It was passed through a cross wrapper to form a web, and then needle punched to obtain Fell 1~ with a basis weight of 2500/m2. Thereafter, the same processing as in Example 1 was carried out to obtain a Gokull1 Shinra sheet with a basis weight of 205 g/-+n2. This sheet was dyed blue using the same cationic dye used in Example 1. In this way, the dyed product that was dyed with the same type of dye in the same bath at the same temperature for - times has a better "matured" state than Example 1, in which different colors of blue were mixed into the dark blue. Moreover, it was a soft raised sheet with a texture that had a mild and deep color throughout.

Example 6 0 gold discharge holes are concentrically arranged in an inner row of 12 holes and an outer row of 1 hole.
With a cap with 8 holes, 30 holes in total, 3 out of 12 holes in the inner row and 6 out of 18 holes in the outer row, a total of 9 holes, have the same core-sheath ratio, and the remaining inner and outer rows have a total of 2 holes.
The same polymer as in Example 3 was used for spinning using a core-sheath type composite die in which each hole had the same core-sheath ratio, and the 9 holes and 21 holes were equally divided in 8 inner and outer peripheral rows. The obtained mixed fiber yarn was drawn in a liquid bath to form 1 q of mixed staples as shown below.

(2) Konsen Staple The above-mentioned mixed fiber staple was subjected to the same processing steps as in Example 5 to obtain a 1sN sheet with a fabric weight of 220Q/v+2m. The same type of cationic dyeing that was used in Example 5 using this sheet! , 'l was used to dye the sample in a blue system. In this way, the dyed product that has undergone the dyeing process - times using the same type of dye in the same bath at the same temperature has a more mature state than Example 5, in which blues of different colors are mixed into deep blue. It was a soft raised sheet with a nice texture and a texture that quickly imparted a mild, deep, and calm color to the entire surface.

[Effects of the Invention] According to the present invention, by dyeing the same type of dye in the same bath, a mixture of dark and light colors can be obtained, and the dyeing stability i, which was possessed by the conventional marbled texture napped sheet manufacturing technology; It is possible to solve the problems of luminescence, cost, etc., and to obtain a raised sheet having a natural-looking, calm, and mild color.

Since the raised sheet of the present invention has a natural-looking color, it can be particularly effectively used in fields where color is important, such as for clothing, furniture, interior decoration, wall coverings, etc.

Claims (3)

[Claims] (1) An ultrafine fiber having a core-sheath structure of 0.5 denier or less, the sheath component of the ultrafine fiber being a polyester copolymerized with 2.0 moles or more of 5-sodium sulfoisophthalate, and the core component is composed of a polymer having different dyeability from the sheath component, and is a napped sheet in which at least two or more types of ultrafine fibers having a core/sheath component ratio different by 5% by weight or more are mixed, and the napped sheet is dark and light colored. A raised sheet characterized by a mixture of. (2) 5-sodium sulfoisophthalate in the sheath component 2.
At least two kinds of core-sheath type ultrafine fibers having a core-sheath structure of 0.5 denier or less and containing a copolymerized polyester of 0 mol or more and having core-sheath component ratios different by 5% by weight or more are spun, mixed, and then raised. A method for producing a napped sheet, comprising forming a sheet, and then dyeing the napped sheet with a cationic dye. (3) The method for producing a raised sheet according to claim (2), wherein the spinning is simultaneous spinning.