JP3270340B2 - Split fiber and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for splitting a filament,
The present invention relates to split fibers that have created a new hand and a method for producing the split fibers.

[0002]

2. Description of the Related Art Hitherto, a technique of dividing a filament into finer pieces to create a new texture has been developed as a technique for producing ultrafine fibers exceeding the spinning limit of the filament. For this purpose, there is a technique (for example, Japanese Utility Model Publication No. 8-9199) in which a multi-ply laminated composite fiber is treated with a chemical to obtain ultrafine fibers, and a fiber composed of inter-island split bodies is treated with a chemical. There is a technology (e.g., Japanese Patent Publication No. 44-18369) that elutes the sea component and makes the island component an ultrafine fiber. The ultrafine fiber obtained by dividing the filament has a round, flat, It takes the form of a wedge or the like, but in each case the dividing surface is smooth and the fineness is at most 0.
It is 25 denier, usually 0.1 denier or less, and is evenly and uniformly divided in the length direction of the fiber.
Therefore, the ultrafine fibers themselves are characterized by an ultra-soft feel, and are suitable for a peach-like fabric having an ultra-soft touch, such as hair growth covering the surface of a peach, or a suede-like fabric impregnated with a urethane resin.

[0003] Further, a technique of dispersing incompatible fine particles in fibers and performing an alkali treatment and a buffing treatment to form fibrillated fluff on the fiber surface (for example,
Japanese Patent Publication No. 2-58374), and the fibril fluff has a fineness of 0.01 to 0.001 denier, which is ultra-fine, and is suitable for a fabric having a strong slimy feeling and a nubuck fabric.

[0004] As described above, the technique of dividing the filament to create a new texture is aimed at producing ultrafine fibers which are difficult to produce by direct spinning of the filament. It was super soft texture.

[0005] With the maturation of these super soft hand synthetic fibers,
As a next-generation new synthetic fiber, it is necessary to create a new split fiber having a feeling different from that of super soft, and development of a split fiber based on a new technical idea has been desired. In particular, a new split fiber that can create a woven texture with a squeaky feel, a dry feel, and an airy (including air) lightweight feel at the opposite end of the conventional ultra soft and compact fabric. The development of the article was desired.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a split filament which can divide a filament into a novel form to create a woven fabric having a squeaky feeling, a dry feeling, and an airy, lightweight feeling, and a manufacturing method. Is to provide.

[0007]

Means for Solving the Problems In order to express the feeling of creaking and dryness, which is one of the objects of the present invention, the concept of splitting of filaments is introduced, and the dividing surface of the filaments is smooth. not,
As if it were a rugged coast like a rugged coast,
The fineness of the split filament was increased to 0.3 denier or more. In addition, in order to express the airy (including air) lightweight feeling, which is another problem, voids were formed in the fibers by partial and uneven splitting.

[0008] is configured this idea is means for solving the problems embodied, the polyester composition comprises a polyester and the polyester composed of an organic compound incompatible
Of multi-lobe shaped filaments
Locally and cut along its length.
When viewed from the plane, at least a part of the lobe joint base
To give fiber internal strain, and then perform alkali weight reduction treatment.
And comprising, locally along the length of the filamentary a split裂繊Article that at least a part lobes of the multi-lobe have a lobe which is Wari裂from filamentary at the junction base portion, Further, the polyester is composed of a polyester composition comprising a polyester and an incompatible organic compound, and a filament having a multilobe-shaped fiber cross section is mechanically pressurized, and the length direction of the filament is changed. Locally and along the cross-sectional direction, the fiber inner strain is applied to at least a part of the lobe joint root, and then the alkali weight reduction treatment is performed, and the fiber inner strain is formed. which is a method of manufacturing a split裂繊Article Ru is Wari裂.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The splitting filament of the present invention is composed of a polyester composition comprising a polyester and an organic compound incompatible with the polyester. It is composed of at least one compound selected from the group consisting of the following general formulas (I), (II) and (III) from the viewpoints of strength, dyeability and the like.

[0010]

Embedded image

Wherein Z is an organic compound residue having 1 to 6 active hydrogens, R ¹ is an alkylene group having 6 or more carbon atoms,
R ² is a hydrogen atom, a monovalent hydroxy hydrocarbon group having 1 to 40 carbon atoms, or a monovalent acyl group having 2 to 40 carbon atoms, and k is 1
An integer from 1 to 6, l is an integer such that k × l is 70 or more, and m is 1
Represents the above integer. )

[0012]

RSO ₃ M (II) (wherein, R represents an alkyl group having 3 to 30 carbon atoms or an aryl group having 7 to 40 carbon atoms, and M represents an alkali metal or an alkaline earth metal.)

[0013]

Embedded image RSO ₃ PR ₁ R ₂ R ₃ R ₄ ... (III) (wherein, R is the same as the definition of R in the above formula (II), and R ₁ R ₂ R ₃ R ₄ is an alkyl group or It is an aryl group.) The content of the organic compound in the polyester matrix is preferably 0.2 to 10% by weight. If the amount is less than 0.2% by weight, the splitting property of the fiber cannot be obtained, and if it exceeds 10% by weight, a decrease in fiber strength and a decrease in color fastness become problems.

The compound of the above formula (I) will be described in more detail.

[0015]

Embedded image

In the above formula, Z is a residue of an organic compound having 1 to 6 active hydrogens, such as methanol, propanol, butanol, phenol, ethylene glycol, bisphenol A, propylene glycol, butylene glycol, butanediol, Residues of hydroxy-containing compounds such as glycerin, trimethylolpropane, triethanolamine, diglycerin, pentaerythritol, and sorbitol, and residues of primary and secondary amines such as ethylenediamine, hexamethylenediamine, and diethylenetriamine Among them, a hydroxy group-containing compound is preferable.

R ¹ is an alkylene group having 6 or more carbon atoms or a substituted alkylene group, among which a substituted alkylene group having 6 to 50 carbon atoms is preferable. Particularly preferred specific examples of R ¹ include a cyclohexyl group, a phenylethylene group, a hexylethylene group, a methyl-pentylethylene group, a heptylethylene group, a methyl-hexylethylene group, and an alkylethylene group having 12 to 40 carbon fibers. I can give it. R ¹ may be a mixture of two or more of the above.

R ² is a hydrogen atom, a monovalent hydrocarbon group having 1 to 40 carbon atoms, a monovalent hydroxy hydrocarbon group having 2 to 40 carbon atoms, or a monovalent acyl group having 2 to 40 carbon atoms. The hydrocarbon is preferably an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkylaryl group or a hydroxyalkyl group. The alkyl group is preferably an alkenoyl group, a cycloalkylcarbonyl group, an arylcarbonyl group, or an alkylarylcarbonyl group.

K is an integer of 1 to 6 corresponding to the number of active hydrogens of the organic compound which is a source of Z. l is k × l is 7
It must be an integer that is 0 or more, and may be the same or different between and within molecules. If the value of k × l is less than 70, the dispersion of the compound in the yarn becomes too fine, the splitting property of the fiber is reduced, and the dry touch and squeaky feeling of the obtained fabric are reduced.

Further, the value of k × l becomes large, and especially when this value exceeds 2,000, the surface of the yarn becomes sticky and the dry touch and squeaky feeling of the obtained woven or knitted fabric are lost. It is preferable that the value of k × l be an integer that is 2000 or less. A more preferred range of k × l is in the range of 100 to 500.

M is an integer of 1 or more and is intermolecular or
Although they may be the same or different in the molecule, m must be an integer of 1 or more in the k branches bonded to Z.

The arrangement of the CH ₂ CH ₂ O unit and the R ₁ O unit constituting the polyoxyethylene-based polyether may be arbitrary, and even if the units are arranged randomly, the units may be arranged in an arbitrary order. May be arranged to form a block, and among them, it is preferable that the R ¹ O unit forms a block alone or forms a block and is localized at the terminal of the polyether molecular chain.

The polyoxyethylene-based polyether may have an oxyalkylene unit having 3 to 5 carbon fiber yarns copolymerized. The introduction of the oxyalkylene group lowers the melting point of the polyether while simultaneously lowering the melting point of the polyether. Since it has an effect of lowering the melt viscosity, it may be preferable in handling polyether. Examples of the oxyalkylene group having 3 to 5 carbon atoms include an oxypropylene group, an oxytetramethylene group, an oxyethylethylene group, an oxyethylpropylene group, and a mixture of two or more thereof.

The polyoxyethylene-based polyether comprises, as an active hydrogen compound, ethylene, an olefin oxide having 6 or more carbon atoms and, if necessary, 3 to 3 carbon atoms.
5 can be synthesized by reacting the alkylene oxide. Among these olefin oxides, nonene oxide, cyclohexene oxide and α-olefin oxides having 12 to 40 carbon atoms are particularly preferable.

FIGS. 1 and 2 are diagrams schematically showing the cross section and side shape of the filament of the present invention. FIG. 1 shows a trilobal cross section and FIG. 2 shows a tetralobal cross section.

The cross-sectional shape of the filament is a multi-lobe shape,
The number of lobes is preferably 3 to 8. The number of lobes is required to be 3 or more in order to locally split some lobes of the multi-lobe along the length direction, and when the number of lobes exceeds 8, the area ratio of the split surface decreases. Is insufficient, and the fineness of the split lobe becomes thin, resulting in insufficient feeling of soaking. Therefore, the number of lobes is particularly preferably 3 to 5. The multi-lobe has an irregularity of 2.3 to 3.
7 is preferred.

Here, the feeling of creaking refers to both the feeling due to the friction between the split surfaces inside the fiber and the hand feeling due to the split surface appearing on the surface of the fiber.

Looking at the state where each lobe is split from the multi-lobe fiber along the length direction of the fiber, one lobe, two lobes, and the like from the part 1 where the lobe is not split at all are shown.
.. And there are sites at various stages of splitting up to site 2 where all the lobes are split. The length of one spot where one lobe is locally split is 50 μm or more.
5 cm is preferred. If it is less than 50 μm, it is insufficient to exhibit the Airy effect as a void in the filament, and if it exceeds 5 cm, it is too long and the airy effect cannot be exhibited as the void in the filament. Here, the length of the split part is represented by an apparent linear distance.

The split surface 3, 3 'of each lobe of the multi-lobe
The 3 '' and 3 '''are made of jagged irregular irregularities like the ria coast. This makes it possible to express a strong texture. The fineness of the fluffs 4, 4 'formed by cutting the splitting lobe is 0.5 denier to 2.5.
Denier is preferred. If it is less than 0.5 denier, it is too thin to give a slimy feeling and the feeling of swelling becomes insufficient.
Beyond 5 denier, the texture becomes too thick and rough. If the number of fluffs is 2 / m or more, the feeling of fluff with a feeling of woven and knitted fabric can be expressed, and if it is large, it may be up to 100 / m. Becomes weaker.

There is a micro-groove 6 along the direction of the fiber axis on the entire surface of the fiber, thereby expressing a dry feeling.

Further, since the filament is locally split along the length direction, there is a portion 1 where the lobe is not split and a portion 2 where all the lobes are split.

Next, the method for producing split fibers of the present invention will be described in detail.

For the production of the split fiber of the present invention, a fiber composed of a polyester composition comprising a polyester and an organic compound incompatible with the polyester and having a multilobe type cross section is used. Here, as the incompatible organic compound, the organic compound described in the embodiment of the split fiber of the present invention is used.

When the filament is mechanically pressurized, the filament has a multi-lobed shape. Therefore, in the filament in which the lobes are directly joined, there is a joint portion at the joint portion, and each of the lobes has a central portion. At the fiber where the lobes are bonded, distortion occurs at the bonded portion, and the inside of the fiber is separated by an external force at the fine particle interface because the incompatible organic compound is dispersed in fine particles in the polyester matrix. Due to its easy property, an internal strain that can be split by a jagged ingress / egress surface like a ria coast is applied according to the state of dispersion of fine particles at the base of each lobe joint of the multilobe.

At this time, the degree of heterogeneity of the multilobe is 2.3 to
If it is set to 3.7, mechanical strain tends to concentrate on the root of each lobe. If it is less than 2, 3, the concentration of strain is insufficient, and if it exceeds 3.7, the strain becomes so strong that all the lobes are split. (The degree of irregularity is represented by the ratio d ₂ / d ₁ between the inscribed circle diameter and d ₁ and the circumscribed circle diameter d ₂ shown in FIG. 3.) When subjected to alkali weight loss treatment, the lobe is split at the site where the internal strain that can be split is embedded, and the split surface becomes a surface with jagged ingress and egress like a ria coast, and splitting of each lobe. Since the state of internal strain varies depending on the portion, the shape becomes irregular. By selecting the relationship between the internal strain and the alkali weight reduction treatment, the split lobes can be cut into fluff.

The mechanical pressurization and the alkali weight reduction can be performed in the state of a filament, a thread and a woven or knitted fabric, respectively, and the mechanical pressurization may be performed before the alkali weight loss.

In the yarn stage, the roller may be heated to room temperature or 80 to 90 ° C. to increase the contact pressure in the yarn stage, and the calender roll may be heated to room temperature using a calendering machine in the weaving and knitting stage. Or by heating to 80-90 ° C,
The treatment may be performed at a pressure of 0 to 160 kg / cm. 40k
At less than g / cm, it is difficult to apply internal strain to the filament,
If it exceeds kg / cm, the multi-lobe of the filament is flattened, and the woven or knitted fabric becomes thinner, which is likely to result. An embossing roll can also be used in place of a calender roll. In that case, even if the pressure is as low as 20 to 70 kg / cm, splitting strain can be imparted.

In the alkali reduction treatment, for example, an alkali concentration of 30 to 40 g / l and a temperature of about 97 ° C.
Preferably, the weight is reduced by 5% by weight. If it is less than 15% by weight, the splitting is insufficient, and if it exceeds 35% by weight, the strength of the fiber is deteriorated.

The filament in the present invention includes both short fibers and long fibers (filaments). In the case of short fibers, it may be used as a spun yarn that is an aggregate thereof, in the case of filaments, it may be used as a multifilament yarn that is an aggregate thereof, or as a long and short composite yarn that is an aggregate of short fibers and long fibers. it can.

Hereinafter, the case of a filament will be described.

The splitting filament of the present invention is a splitting filament multifilament yarn in which only splitting filaments are aggregated, and a splitting filament in which the split filament multifilament is mixed with another different multifilament yarn. It is a mixed fiber, and a woven or knitted fabric can be manufactured.

In the case of a split filament multifilament yarn in which only split filaments are aggregated, one or more lobes are split in each of 20 to 90% of the filaments when viewed in a cross section of the multifilament yarn. Is preferred, and 30 to 7
Those in which splitting is observed in 0% of the filaments are more preferred.

In the case of a split-fiber mixed yarn in which the split-filament multi-filament yarn and another different multi-filament yarn are mixed, polyester, nylon, acetate, rayon is used as the other different multi-filament yarn. Used without any particular limitation, and also has high shrinkage, cationic dyeing,
It is also possible to use a filament yarn having functions such as matte dull, irregular gloss, antistatic property and stretchability.

In the case of a blended yarn in which bulge and waist resilience are imparted by using a copolyester multifilament yarn as a heterogeneous multifilament yarn, the heterogeneous multifilament yarn comprises a main acid component and / or
Or 5 to 1 copolymer component based on the glycol component
8 mol% copolymerized polyester multifilaments are preferred. If it is less than 5 mol%, the swelling and waist rebound are insufficient, and if it exceeds 18 mol%, the color fastness and iron shrinkage become problems. As the copolymerization component, isophthalic acid,
Bisphenol A and its ethylene oxide adduct are preferred.

In the case of a mixed yarn in which different types of multifilaments are mixed, the split filament multifilament yarn is relatively located in the surface layer portion, and the different types of multifilament yarn is relatively located in the inner layer portion. Is preferred. By doing so, the feeling of the split fiber can be expressed on the surface of the woven or knitted fabric.

In the case of a mixed fiber, it is preferable that conjugation properties are imparted by a twisted yarn or an interlace, and the number of interlaces is practically 20 to 120 / m. When the number is less than 20 pieces / m, the conjugation effect is insufficient. When the number exceeds 120 pieces / m, the feeling becomes hard.

Next, a method for producing a split filament multifilament mixed yarn obtained by mixing split multifilament yarns and different types of multifilament yarns will be described.

As a split fiber raw yarn, a multifilament yarn having a multilobed fiber cross-section, which is composed of a polyester composition comprising a polyester and an organic compound incompatible with the polyester, is used. Mixed with multifilament yarn. Here, as the incompatible organic compound, the organic compound described in the method for manufacturing the split fiber is used first, and the number of lobes and the degree of irregularity of the cross section of the multilobe fiber are similarly determined. The method described in the method is used.

The interlacing means is most preferably an interlace nozzle. Both multifilament yarns may be drawn to the same length and mixed, or one of the multifilament yarns may be mixed by several%.
May be overfed and mixed. The interlace conditions are preferably such that the overfeed rate is 0.5 to 5% and the pneumatic pressure is 0.5 to 6 kg / cm ² .

As the fiber mixing means, a Taslan nozzle can be used in addition to the interlace nozzle. In this case, the overfeed ratio is set to 0.5 to 5%, and the difference between the overfeed ratios of both yarns is set to 0 to 5%. By doing so, it is possible to produce from a mixed fiber having no loop to a spanned mixed fiber having fine loops. In the case of a Taslan nozzle, the compressed air pressure is preferably set to 3 to 10 kg / cm ² .

Next, the mixed fiber is mechanically pressurized in a yarn or cloth state, and locally joined along the length direction of the multifilament yarn to each lobe of the multilobe of the multilobe filament yarn. At least a part of the root portion is provided with a fiber internal strain, and then an alkali weight reduction treatment is performed to split the lobe at the fiber internal strain portion. The mechanical pressurization method and the alkali weight reduction method may employ the method described in the method for producing split split fibers.

When a high shrinkage factor is used for different types of multifilaments to be mixed, a multifilament having a boiling water shrinkage factor of 5 to 60% higher than that of the split fiber is preferably used. 5
%, The heat treatment cannot add swelling to the woven or knitted fabric, and it becomes difficult to handle the dyeing and finishing step exceeding 60%.

The high shrinkage yarn may be a multifilament yarn mainly composed of polyethylene terephthalate,
A multifilament yarn made of a copolymerized polyester may be used. When a copolymerized polyester is used, a polyester fiber obtained by copolymerizing the copolymerized component in an amount of 5 to 18 mol% based on the main acid component and / or glycol component constituting the polyester is preferable.

When a copolyester is used as the high shrinkage yarn, a mixed fiber yarn is obtained which shrinks in the twist setting in the fabric preparation step and also in the dyeing finishing step and shrinks in the heat setting step after dyeing. As this copolymerization component, one or more selected from the group consisting of dicarboxylic acids, diols and bisphenols are used.

Other copolymer components have problems such as high polymer cost, poor spinning properties, and failure to obtain the desired heat shrinkability.

Here, the dicarboxylic acid is a dicarboxylic acid other than terephthalic acid, such as sebacic acid, phthalic acid and isophthalic acid. The diol is diethylene glycol, butylene glycol, propylene glycol or the like. Bisphenol is bisphenol A, bisphenol sulfone or an ethylene oxide adduct thereof.

The copolymerization amount is 5 to 5 based on terephthalic acid.
The range is 18 mol%. If it is less than 5 mol%, the necessary heat shrinkage cannot be obtained, and if it exceeds 18 mol%, shrinkage will not be completed in the dyeing and finishing step, causing problems such as poor dimensional stability of the product.

Among the above copolymer components, isophthalic acid is the easiest to use from the viewpoints of polymer cost, spinnability, yarn workability and product quality. When a polyester fiber obtained by copolymerizing bisphenol A or an ethylene oxide adduct thereof as a diol component is used, there is a characteristic that the shrinkage force is high even under the restraining force of the fabric structure. However, since light-fastness of this type of fiber may become a problem, the content is preferably 5 mol% or less.

When the content of bisphenol A is 5 mol% or less, the contraction rate can be increased by copolymerizing isophthalic acid as the fourth component and setting the total copolymerization amount to 18 mol% or less.

It is preferable to impart conjugation properties to the mixed fiber by twisting or interlacing, and the interlacing is practically 20 to 120 yarns / m. When the number is less than 20 pieces / m, the conjugation effect is insufficient. When the number exceeds 120 pieces / m, the feeling becomes hard.

The woven or knitted fabric produced by using the split filament multifilament yarn or the split filament mixed yarn of the present invention has a surface layer made of an organic compound incompatible with the polyester in a polyester matrix. Having a multi-lobed cross-sectional filament in which fine particles are dispersed, and the filament has an airy and lightweight feeling that satisfies the following requirements at the same time,
A woven or knitted fabric having a strong squeaky feeling, a dry feeling and a squeaky fluffy feeling can be obtained.

The surface of the multi-lobe shaped filament has fine grooves along the fiber axis direction formed by removing fine particles by alkali treatment, and a part of the multi-lobe shaped filament. Of the multilobe-shaped cross-section lobe has irregular irregularities on the split surface of the lobe split from the lobe. The cleaved lobe has a fluff having an irregular surface formed by cutting a part thereof.

Further, by adding a buffing process, fibrils can be further generated and the texture of fibrils can be added.

[0064]

【Example】

Example 1 A polyoxyethylene-based polyether was used.
5 parts by weight of the added polyethylene terephthalate polymer is melt-spun using a spinneret for high irregularity trilobal yarn, and drawn and heat-set to form a trilobal section with irregularity of 2.7 and a multifilament with a fineness of 75 denier / 36 filaments. A drawn yarn was obtained. This yarn has a Venetian twill design, a twisted S300 T / M for the warp and a twisted S25 for the weft.
00T / M and Z2500T / M were alternately implanted to obtain a greige having a density of 81 lines / cm and a weft density of 28 lines / cm.

The greige fabric was relaxed and preset according to a conventional method, and then subjected to a calendering treatment at a temperature of 9 ° C.
It is performed under the condition of 0 ° C. and a pressure of 120 kg / cm.
Alkali weight reduction treatment at a temperature of 97 ° C and a caustic soda concentration of 35
g / l and a weight loss rate of 25% by weight to obtain a woven fabric composed of split fibers.

When observing the split fiber, some lobes of the multilobe were locally split from the fiber at the root of each lobe joint along the length direction of the split fiber. The length was distributed between 100 μm and 3 cm, and the split surface was irregular on both the fiber side and the lobe side, and had a concave-convex cross-sectional shape like a ria coast.

The surface layer of the woven fabric is a trilobal cross-section filament in which fine particles made of polyoxyethylene polyether are dispersed in a matrix of polyethylene terephthalate. Micro-grooves along the fiber axis direction formed by the treatment, voids in the fiber formed by splitting some lobes of the multi-lobe of the fiber from the fiber, and splitting caused by the lobe splitting It was covered with irregular shaped irregular surfaces on both sides.

The hand of the woven fabric had a strong squeaky feeling and a dry feeling and a light and light feeling.

[Example 2] The same greige fabric was prepared using the yarn of Example 1, and the pressure treatment was performed at a temperature of 90 ° C and a pressure of 130 kg.
/ Cm, alkali weight loss treatment was performed at a temperature of 97 ° C., a caustic soda concentration of 35 g / l, and a weight loss rate of 30% by weight to obtain a woven fabric composed of split fibers.

Observation of the split fiber showed that it was the same as in Example 1 and that some of the split lobes were further cut to form fluff. The number of fluff was 32 / m and the fineness of the fluff was 0.42 to 0.53 denier.

The surface of the woven fabric was the same as in Example 1, and there was a fluff formed by cutting a part of the split lobe.

The hand of the woven fabric had a strong squeaky feeling and a dry feeling, a fluffy touch with a squeaky feeling, and an airy lightweight feeling.

Example 3 A polyethylene terephthalate polymer to which 1.5 parts by weight of a polyoxyethylene-based polyether was added was melt-spun using a spinneret for a trilobal yarn having a high degree of irregularity as a split yarn. Using a multifilament drawn yarn having a trilobal cross section of irregularity of 2.9 obtained by drawing heat setting, a fineness of 50 denier / 24 filaments, and a shrinkage of boiling water of 8%, isophthalic acid of 12 mol as a heterogeneous multifilament yarn % Copolymerized polyethylene terephthalate polymer was melt spun and stretched at a low temperature, and a multifilament drawn yarn having a round cross section, a fineness of 30 denier / 12 filaments, and a boiling water shrinkage of 25% was used.

Both multifilament yarns were overlaid at a rate of 2% and compressed air pressure of 3% using an interlace nozzle.
The fibers were mixed under a condition of 0 kg / cm ² , and an interlace of 48 pieces / m was provided.

The resulting mixed yarn having a fineness of 80 denier / 36 filaments was used in a Venetian twill structure, and the warp was subjected to twisting S300 T / M and the weft was twisted S2500 T / M.
And Z2500 T / M, alternately driving,
A green fabric having a density of 30 pieces / cm and a weft density of 30 pieces / cm was obtained.

The greige was relaxed and preset according to a conventional method, and then subjected to a calender pressure treatment at a temperature of 90 ° C.
At a temperature of 97 ° C. and a caustic soda concentration of 35 g.
/ L, weight loss 25% by weight, to obtain a woven fabric composed of split filament multifilament mixed yarn.

When the split filament multifilament yarn was observed, it was found that the split filament multifilament yarn was relatively located at the surface layer and the isophthalic acid copolymerized polyethylene terephthalate multifilament yarn was located relatively at the inner layer. .

The split filament multifilament yarn relatively located on the surface layer is formed such that some of the lobes of the multilobe are locally formed along the longitudinal direction of the filament at each lobe joint root. And the length of the splitting lobe is 10
It was distributed between 0 μm and 3 cm, and the split surface was irregular on both the fiber side and the lobe side, and had a concave-convex cross-sectional shape like a ria coast.

The surface layer of the woven fabric is a trilobal cross-section filament in which fine particles composed of polyoxyethylene polyether are dispersed in a polyethylene terephthalate matrix. Fine grooves along the fiber axis direction that have been removed by the processing,
Some of the lobes of the multi-lobe of the fiber were covered with voids in the fiber formed by splitting from the fiber and irregular irregular surfaces on both sides of the split caused by the splitting of the lobe.

The hand of the woven fabric had a swelling sensation due to a difference in shrinkage between the two yarns, a strong squeezing sensation due to split fibers, a dry sensation, and an airy, lightweight sensation.

Example 4 Using the mixed yarn of Example 3,
Make the same greige machine, pressurize at 90 ° C, 130k
g / cm, alkali reduction treatment at a temperature of 97 ° C., a caustic soda concentration of 35 g / l, and a weight loss rate of 25% by weight.
A woven fabric composed of split filament multifilament mixed yarn was obtained.

When the split filament multifilament mixed yarn was observed, it was the same as in Example 3, and there was a fluff formed by cutting a part of the split lobe on the surface layer. The number of fluff is 35 / m, and the fineness of fluff is 0.43 to 0.51.
It was denier.

The structure of the woven fabric was the same as that of Example 3, and there was a fluff formed by cutting a part of the split lobe.

The texture of the woven fabric had a swelling feeling, a strong squeaky feeling, a dry feeling, a fluffy touch with a squeezing feeling, and an airy lightweight feeling.

Example 5 A polyethylene terephthalate polymer containing 1.0% of a metal salt of an organic sulfonate was spun at a spinning speed of 3000 m / min as a raw fiber for splitting filaments, the number of gloves was 4, and the degree of irregularity was 2.38. A highly oriented undrawn yarn having a cross-sectional shape of 78de / 24fil and an elongation of 68% was obtained, then stretched by 0.4% between a pretensioning roller and a heating roller, and then preheated with a heating roller at 95 ° C. A multifilament yarn obtained by heat-treating in a state of 1% relaxation with a non-contact heater at 200 ° C. and a boiling water shrinkage ratio of 5% between the take-up roller and a take-off roller is used as a heterogeneous multifilament yarn. 2,2
Polyethylene terephthalate polymer obtained by copolymerizing 6% by mole of -bis {4- (2-hydroxyethoxy) phenyl} propane and 4% by mole of isophthalic acid has a spinning speed of 1
Spun at 100 m / min to obtain an unstretched yarn having an elongation of 340%, and then stretched 2.7 times at 90 ° C. to obtain a high heat of 50 de / 12fil with a boiling water shrinkage of 46% and an elongation of 42%. A contractile drawn yarn was used.

Both multifilament yarns were mixed using an interlace nozzle under the conditions of an overfeed rate of 1.5% and a compressed air pressure of 2.5 kg / cm ² to give an interlace of 70 yarns / m. The obtained composite yarn is 132 de
/ 36 fill, strength 3.9 g / d, elongation 39%, boiling water shrinkage 37%.

Next, a twist of 250 T / M was applied to the composite yarn to give a warp density of 167 yarns / inch and a weft yarn density of 78 yarns / in.
Create satin fabric with ch, relax according to the usual method,
Presetting, calendering, alkali reduction treatment, dyeing, and final setting were performed. Here, as the calendering conditions, a pressure of 120 kg / cm was performed at 90 ° C.
As the alkali weight loss conditions, a weight reduction treatment of 25% by weight was performed at 97 ° C. using an alkali solution having a concentration of 35 g / l.

The obtained woven fabric has a surface layer mainly covered with splitting fibers, and about 65% of each fiber is 0.3 de.
Split at 2.5 de and the split surface has sharp irregularities like the ria coast, some fibrils, etc., and many relatively deep slit-like grooves on the fiber side surface almost parallel to the fiber length direction. The natural and dry touch was hard to distinguish from natural cellulose fibers.

On the other hand, the split yarn has a boiling water shrinkage of 5%.
In contrast to the following low heat shrinkage, different types of yarn for fiber use have a high heat shrinkage of 46% boiling water shrinkage, so that a high bulkiness due to the difference in shrinkage between the two yarns is developed, and this is very important in combination with the splitting of the yarn for split yarn. In addition, an airy, lightweight, highly sensible fabric was obtained.

[0090]

According to the split filament or the split filament multifilament mixed yarn of the present invention, the air space (including air) is increased due to the space in the filament formed by the splitting of a part of the lobes of the multilobe fiber. A light feeling can be expressed, and the cracked surface can be expressed by a rough irregular shaped irregular surface like a rias coast, and a strong squeaky feeling can be expressed, and a dry fluff texture is expressed by the cut fluff of the split lobe In addition, a dry feeling can be expressed by fine grooves on the entire surface of the fiber.

Further, according to the method for producing split fibers of the present invention or the method for producing multi-filament mixed split yarn of split fibers, split fibers having the above-mentioned characteristics can be produced efficiently.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a cross section and a side shape of an example of the splitting fiber of the present invention.

FIG. 2 is a diagram schematically showing a cross section and a side shape of another example of the splitting fiber of the present invention.

FIG. 3 is a diagram illustrating the degree of irregularity referred to in the present invention.

[Explanation of symbols]

1… A site where the lobe is not split 2… A site where all the lobes are split 3,3 ′, 3 ″, 3 ′ ″… Split surface 4,4 ′… Fuzz 5 …… Split Voids in the fiber created by the above 6 …… Micro grooves

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI D02J 3/02 D03D 15/00 B D03D 15/00 D06M 101: 32 // D06M 101: 32 5/02 EG (72) Invention Person: Norimitsu Kamiyama 3-4-1, Amihara, Ibaraki-shi, Osaka Teijin Limited Osaka Research Center (72) Inventor: Sadato Hashidate 3-4-1, Amihara, Ibaraki City, Osaka Teijin Limited: Osaka Research Center (56 References JP-A-61-12907 (JP, A) JP-A-55-16906 (JP, A) JP-A-57-95340 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) D06M 11/38-11/40 D01D 1/00-13/02 D01F 6/62 301-308 D01F 6/84 301-6/86 307 D01F 6/92 301-309 D02G 3/04 D02J 3/02 D03D 15/00

Claims (20)

(57) [Claims] 1. A filament comprising a polyester composition comprising a polyester and an organic compound incompatible with the polyester , and having a multi-lobed cross section.
Mechanically pressurized locally along its length,
At least some lobes are joined when viewed from the cross-sectional direction
Apply fiber internal strain to the root, then apply alkali reduction
It becomes subjected to physical, locally along the length of the filamentary, split裂繊Article that at least a part lobes of the multi-lobe have a lobe which is Wari裂from filamentary at the junction base portion. 2. The split filament according to claim 1, wherein a part of the split lobe is cut to form fluff. 3. The method according to claim 1, wherein the incompatible organic compound is at least one compound selected from the group consisting of the following general formulas (I), (II) and (III). Split fibres. Embedded image (Wherein, Z is an organic compound residue having 1 to 6 active hydrogens, R ¹ is an alkylene group having 6 or more carbon atoms, R ² is a hydrogen atom, a monovalent hydroxy hydrocarbon group having 1 to 40 carbon atoms, Or a monovalent acyl group having 2 to 40 carbon atoms, k is an integer of 1 to 6, l is an integer such that k × l is 70 or more, and m is an integer of 1 or more.) RSO ₃ M (II) (wherein, R represents an alkyl group having 3 to 30 carbon atoms or an aryl group having 7 to 40 carbon atoms, and M represents an alkali metal or an alkaline earth metal.) RSO ₃ PR ₁ R ₂ R ₃ R ₄ ... (III) (wherein, R is the same as the definition of R in the above formula (II), and R ₁ R ₂ R ₃ R ₄ is an alkyl group or an aryl group.) 4. The split fiber according to claim 1, wherein the number of lobes in the multilobe shape is 3 to 8. 5. The irregularity of the multilobe type is 2.3 to 3.
The splitting fiber according to claim 1, 2, 3, or 4, which is 7. 6. The length of a lobe split from a filament is 50 μm.
The split filament according to claim 1, 2, 3, 4, or 5, which has a diameter of m to 5 cm. 7. The split fiber according to claim 1, wherein the split surface of the split lobe has an irregular cross section. 8. The method of claim 2, wherein the fineness of the cut fluff of the split lobe is 0.3 to 2.5 denier.
4. The split filament according to 4, 5, 6 or 7. 9. The number of cut fluff in the split lobe is 2
Claims 2, 3, 4, 5,
The split fiber according to 6, 7, or 8. 10. A filament composed of a polyester composition comprising a polyester and an organic compound incompatible with the polyester, and having a multilobe-shaped fiber cross section, which is dynamically pressurized to form the filament. Locally along the length direction and when viewed from the cross-sectional direction, at least a part of the lobes is subjected to a fiber internal strain at the joint root portion, and then subjected to an alkali weight reduction treatment, thereby performing the fiber internal strain. method of manufacturing a split裂繊Article that was Wari裂of <br/> the lobe part. 11. The method for producing split fibers according to claim 10, wherein the lobe is split at the strained portion inside the fiber, and a part of the split lobe is cut to form fluff. 12. The method according to claim 1, wherein:
Mounting of the split裂繊conditions is split裂繊Article assembly that has been configured with a plurality of sets. 13. The split filament aggregate according to claim 12, wherein the split filament aggregate is a multifilament yarn. 14. A multifilament according to claim 13,
Yarn and is split裂繊Article assembly and split裂繊conditions multifilament combined filament yarns and multi-filament yarns of different ing been commingled and the multi-filament yarn. 15. The split filament multifilament mixed yarn according to claim 14, wherein the heterogeneous multifilament yarn is a polyester multifilament yarn obtained by copolymerizing a copolymer component with 5 to 18 mol%. 16. The split filament multifilament yarn according to claim 14 or 15, wherein the split filament multifilament yarn is located relatively in the surface layer portion, and different types of multifilament yarns are located relatively in the inner layer portion. . 17. The split filament multifilament mixed yarn according to claim 14, 15 or 16, wherein the number of entanglements is 20 / m to 120 / m. 18. A multifilament yarn comprising a polyester composition comprising a polyester and an organic compound incompatible with the polyester, wherein the multifilament yarn has a multilobe fiber cross section and a multifilament different from the multifilament yarn. After blending the yarn, the yarn is mechanically pressurized so that at least a part of the multi-filament yarn is locally seen along the length direction of the multi-lobed filament yarn and when viewed from the cross-sectional direction. the fiber internal strain imparted to the joint base portion of the lobes, then subjected to caustic treatment, split裂繊Article multifilament combined filament yarn manufacturing method of Ru is Wari裂lobes in the fiber internal strain unit. 19. The method for producing a split filament multifilament mixed yarn according to claim 18, wherein the heterogeneous multifilament yarn is a high shrinkage polyester multifilament yarn obtained by copolymerizing a copolymer component with 5 to 18 mol%. 20. The surface layer of the woven or knitted fabric has a multilobe-shaped cross-sectional filament in which fine particles made of an organic compound incompatible with the polyester are dispersed in a polyester matrix, and the filament has the following characteristics. at the same time satisfy <br/> the requirements of ~, a woven or knitted fabric of the strong feeling of friction in the light amount. On the surface of the multilobe-shaped cross-sectional filament, fine particles are formed along the fiber axis direction formed by removing fine particles by alkali treatment, and some lobes of the multilobe-shaped cross-section filament are formed. The multi-lobed cross-section shaped filament has irregular irregularities on a cleavage surface of a lobe that has an inner space in the filament formed by splitting from the filament. Has a fuzz with an irregular surface formed by cutting a part of the lobe.