JP3281267B2 - Method for producing fibrillated polyester fiber fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing a fibrillated polyester fiber woven fabric having a uniform appearance.

[0002]

2. Description of the Related Art In recent years, a fiber is prepared by dispersing and blending an additive made of an organic compound incompatible with the polymer as a base material of the fiber, and a solvent for dissolving the base polymer or the additive in the fiber. A method of generating fibrils by performing a dissolving treatment using a polymer and obtaining a novel tactile sensation, feeling, appearance function and the like is being carried out for various fiber products.

For example, Japanese Patent Publication No. 2-58374 and JP-A-6-248512 disclose a woven or knitted fabric obtained by adding a metal salt of an organic sulfonic acid to a polyester fiber as an organic compound incompatible with the polyester. There is disclosed an example in which a fibril is generated in the polyester fiber by subjecting the polyester fiber to a post-alkaline hydrolysis treatment to impart a feeling of suede or rayon or a water absorption.

However, in the conventional method, fibrils can be generated, but it is very difficult to uniformly generate fibrils throughout the fiber product, and there is a problem that the appearance tends to be uneven.

That is, the fineness, length, and amount of fibrils are partially different, which results in differences in dyeing and morphology, making them more conspicuous. Originally, the dyeability of polyester fibers is influenced by the fiber structure. In addition to being remarkably susceptible, when an organic compound incompatible with the polyester is added to the polyester fiber and then subjected to stretching or the like, the organic compound is subjected to a stretching action at the same time as the polyester and dispersed in a streak shape in the fiber axis direction. When subjected to an alkali hydrolysis treatment, the weight loss proceeds from the interface between the organic compound and the polyester, and a fibril phenomenon occurs. Therefore, the generation state of the fibrils is affected by the dispersion state of the organic compound in the spinning process. This is because, in addition to being easy, the product is likely to be non-uniform due to the influence of the force and heat received in the production process.

In order to solve such a problem, Japanese Patent Application Laid-Open No.
No. 197375 discloses a method in which a fabric composed of polyester fibers in which an incompatible organic compound is mixed with polyester is pressurized using a calender roller or the like, and then alkali-reduced to fibrillate.

However, in this method, the bulkiness, waist resilience, strength, etc. of the fabric are reduced, and in addition, cracking spots tend to occur particularly when the splittable conjugate fibers are arranged in the warp of the woven fabric. There were drawbacks.

That is, the warp of the woven fabric is unwound in the weaving process, twisted, twisted set, warping, sizing, opening during weaving, tension such as reed pressing, mechanical strain such as bending, compression, and abrasion, and heat distortion. Alternatively, it is more likely to be affected by moisture or the like than a weft or a knitted fabric, so that spots are likely to occur.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a method for producing a fibril-formed polyester fiber woven fabric using polyester fibers in which an organic compound incompatible with polyester is dispersed and blended. It is an object of the present invention to provide a method for preventing a decrease in resilience or strength, preventing a spot on a warp, and uniformly generating fibrils over the entire surface of a woven fabric.

[0010]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, have added a woven fabric in which a polyester fiber in which an organic compound incompatible with polyester is dispersed and blended is arranged in a warp. It has been determined that a desired fabric can be obtained when pressure is applied intermittently along the warp direction of the fabric in reducing the alkali after pressing.

[0011] Thus, according to the present invention, a fabric which arranged polyester fibers blended with organic compounds incompatible in port Riesuteru the warp, the rollers along the warp direction of the fabric product
The width in the circumferential direction is 0.4 to 3.0 mm, and the height is 0.2 to 2
mm, the protrusion extending continuously in the axial direction of the roller is
Roller with 2 / cm or more in the circumferential direction of the roller
Ri After pressure intermittently pressurized, and caustic treatment, producing how fibrillated polyester fiber fabric, characterized in that to fibrillation is provided.

[0012]

DETAILED DESCRIPTION OF THE INVENTION The present inventors are studying a method for uniformly generating fibrils over the entire surface of a woven fabric in which polyester fibers in which an organic compound incompatible with polyester is dispersed and oriented are arranged. It has been found that the application of compressive deformation affects the generation of fibrils, but as described above, ordinary calendering reduces bulkiness and repulsion, drapability, etc. By diligently examining the method of imparting compressive deformation, by applying a strong strain locally at a short pitch along the length direction of the polyester fiber, a much smaller compression than the conventional method of compressing the entire woven fabric. Finding the same or better effect with force,
This has led to the present invention.

The polyester fibers used in the present invention are:
The following (1) to (5) are preferably exemplified.

(1) The polyester fiber has the general formula RS
Polyester represented by O ₃ M, in which a metal salt of an organic sulfonic acid incompatible with polyester is added and oriented. here,
R is an alkyl group having 3 to 30 carbon atoms, or 7 to 4 carbon atoms.
0 represents an aryl group or an alkylaryl group, and M represents an alkali metal or an alkaline earth metal. When using an organic metal sulfonic acid salt, it is not necessary to use a single compound, and a mixture of various metal sulfonic acid salts having an alkyl group or an alkylaryl group may be used.

(2) Polyester represented by the general formula (I) obtained by adding and blending a modified polyester obtained by copolymerizing an incompatible organic sulfonic acid compound with the polyester. Here, A is a trivalent aromatic group or an aliphatic hydrocarbon group, M ¹ is a metal or hydrogen atom, X is an ester-forming functional group, Y is the same or different ester-forming functional group as X, Or a hydrogen atom.

[0016]

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(3) A polyester compound represented by the general formula (II), in which a phosphorus compound incompatible with polyester is added and blended. Here, M ² is a metal, m is 0 or 1, V is a monovalent organic group, Z is —OH, —OV ¹ , —OM ⁵ or a monovalent organic group, and V ¹ is as defined above for V And V ¹ V may be the same or different, M ⁵ is the same as the definition of M ² above, and M ⁵ and M ² may be the same or different. Further, the monovalent organic group is the same as the definition of the organic group in V, and may be the same or different from V.

[0018]

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(4) A polyester represented by the general formula (III) to which an incompatible sulfonic acid compound is added and blended. Here, M ³ and M ⁴ are metals, n is 1 or 2, and W is a hydrogen atom or an ester-forming functional group.

[0020]

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(5) A compound in which a water-insoluble polyoxyethylene polyether represented by the general formula (IV) is added and blended. Here, Z is an organic compound residue having 1 to 6 active hydrogens, R ¹ is an alkylene group or a substituted alkylene group having 6 or more carbon atoms, R ² is a hydrogen atom, a monovalent having 1 to 40 carbon atoms. A hydroxy hydrocarbon group having 2 carbon atoms
A monovalent hydroxy hydrocarbon group of -40 or a monovalent acyl group of 2-40 carbon atoms, k is an integer of 1-6, l is k
X represents an integer of 70 or more, and m represents an integer of 1 or more.

[0022]

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The amount of the additive comprising an organic compound incompatible with the polyesters described in the above (1) to (5) is added in consideration of the spinning properties, fiber properties, fibril properties and the like. 0.1 to 30 with respect to the weight of
% By weight is preferred.

The form of the polyester fiber is as follows:
A round cross section, an irregular cross section, fineness, the number of constituent filaments, whether long fibers or short fibers, crimping, presence or absence of inorganic additives, and the like may be appropriately selected depending on the purpose.

Further, the polyester fibers may be used alone or as a mixture with other fibers.

Next, local indentations are applied to the entire surface of the woven fabric prepared using the polyester fiber at a pitch of 2 / cm or more in the longitudinal direction of the polyester fiber. When a dissolving treatment is carried out with a solvent that dissolves the fibrils, even if there is unevenness in physical properties that slightly affects the generation of fibrils in the spinning or production process, the fibrils are uniformly generated without mixing the unevenness in physical properties Can be done.

Here, as a method of applying a local impression to the entire surface of the fabric, for example, as shown in FIG. 1, at least one of a pressure nip roller composed of two rollers A and B as shown in FIG.
As shown in FIG. 1A or FIG. 2 ( 3), by using a roller having a pattern of irregularities extending continuously in the axial direction of the roller and supplying a uniformly expanded fabric to the roller. A method of uniformly applying the indentations of the uneven pattern to the fabric is used.

As shown in FIG. 1A, the concavo-convex pattern has a roller width of 0.4 to 3.0 mm and a height of 0.2 to 2 mm on the roller surface. The projections extending continuously in the axial direction of the gear like teeth of a gear,
One provided with two / cm or more pitches in the circumference direction of the roller, walk book as illustrated in (3) in FIG. 2, such as those in the waveform linear projection, width and height and the pitch of the projections The present invention is not limited to these examples and can be widely used as long as it has the indentation form of the present invention.

The temperature of these rollers is preferably 120 ° C. or less, preferably room temperature, for polyester fibers. When the roller is heated to 120 ° C. or higher, the fabric is heat-set in a crushed form, despite the fact that the pressure of the angle pressing roller is reduced to prevent the bulk of the woven fabric from being reduced. Will decrease.

In addition, despite the fact that a strong strain is intentionally imparted inside the fiber to promote the generation of fibrils, heating the roller to 120 ° C. or higher facilitates the deformation of the fiber, resulting in a strong strain effect. It cannot be given.

Further, as shown in FIG.
That the width W of the circumferential length direction of the roller of the protrusion of the roller 0.
It needs to be 4-3.0 mm, which is 0.4 mm.
It is less than mm, the strength or fibers are cut or reduced, whereas or become fibers hardly marked with indentations exceeds 3.0 mm, bulk of the fabric may turn liable to lower.

The shape of the projection is preferably a shape obtained by rounding a rectangular corner as shown in FIG. 3B to an obtuse angle rather than an acute rectangle so as not to damage the fiber.

The pitch of the indentation must be 2 / cm or more.
Yodea Ru. Sufficient effect can not be obtained to resolve the two / the less cm heterogeneity of the raw yarn and nonuniformity received at commercialization step. Further, it is preferable that the pitch is coarser as the width of the protrusion is wider, and conversely, the pitch is finer as the width of the protrusion is narrower.
That is, if the interval between the indentation and the indentation is too short, it will not be different from a simple calendering and the bulkiness will be reduced,
A large pressing force is required.

The height t of the projection is 0.2 mm or more.
Is necessary . If it is less than 0.2 mm, a sufficient fibril promoting effect cannot be obtained. Conversely, when too high addition such as strength reduction stiff raised, but not be generalized by the thickness of the fabric caused machining time and the like susceptible to such Toka damage problems roller approximate preferably 2mm or less as a guide. The magnitude of the pressing force is preferably about 1 to ³ kg / cm ² , and a considerably smaller force is required as compared with general embossing or calendering.

The indentation has a large influence on fibril development. By applying the indentation at a pitch of 2 / cm or more, uniform fibril nuclei grow in the length direction of the fiber. It is believed that the potential for small, non-uniform fibrils is eliminated.

The above-mentioned indentation imparting roller may be used at a position before winding up the woven fabric on a weaving machine, or may be used at a position before a dissolution treatment during a dyeing finishing process, or in a completely different process. May be used.

Further, when a woven fabric surface having a rubbing action such as buffing or needle cloth raising is applied after the dissolution treatment, each fibril is opened well, and the span touch, suede touch and warm touch are further improved. And a uniform appearance is obtained.

Hereinafter, the present invention will be described specifically with reference to examples.

[0039]

EXAMPLE 100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, 0.06 part of calcium acetate monohydrate and 0.009 part of cobalt acetate tetrahydrate were charged into a transesterification vessel, and subjected to transesterification in a nitrogen gas atmosphere. Was. Thereafter, 0.058 part of trimethyl phosphate as a stabilizer and 0.024 part of dimethylpolysiloxane as an antifoaming agent and 0.04 part of antimony trioxide were added, the temperature was raised to 240 ° C., and the following chemical formula (V) (provided that: j is an integer of 14 to 16, l is about 180 as an average value, and m is about 1 as an average value.
0. ) Was added, and the temperature was raised to 280 ° C., and 0.4 parts of Irganox 1010 (manufactured by Ciba Geigy) was added as an antioxidant during the polymerization to polymerize.

[0040]

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The intrinsic viscosity of the polymer obtained is 0.645.
０．６0.655, and its softening point was in the range of 260-263 ° C. After chipping the polymer by a conventional method,
It is dried and melt-spun at 285 ° C. using a spinneret having 24 round spinning holes having a hole diameter of 0.3 mm, and then stretched at 80 ° C. at a draw ratio such that the obtained drawn yarn has an elongation of 30%.
And a drawing heat treatment using a 160 ° C. plate heater to obtain a drawn yarn of 75 denier / 24 filaments.

Then, separately from the polyester, a high heat-shrinkable polyester fiber obtained by copolymerizing isophthalic acid with 50 denier / 12 filaments was combined with polyester, and the mixture was reconsidered with an air nozzle, and then twisted at 600 T / M. Was used for the warp and the weft to make a 2/2 twill weave.

Next, the woven fabric is scoured, dried, heat-set, indented, alkali-reduced, dyed in a conventional manner.
It passed through each process of a buffing process and a final heat set.

The conditions for the indentation treatment are as follows: a calender roller provided with a pair of pressure nip rollers (manufactured by Yuri Roll, "Pneumatic Embossing Machine") shown in FIG. A metal roller having a corrugated linear protrusion pattern shown in (3) of 2 was used, the width of the protrusion portion was 1 mm, the height was 0.6 mm, and the pitch in the circumferential direction was about 4 / cm. The pressure of the pressure nip roller was 2.5 kg / cm ^{2 at} 90 ° C.

The woven fabric obtained through the above steps has a uniform fibril appearance without any warp spots, and has a soft spun rayon-like touch by fibril fibers on the woven fabric surface and a different shrinkage / denier mixed fiber. It is an unusual elegant casual new texture and sensibility fabric that combines swelling, drape and repellency.

Incidentally, the fabric produced as a trial without applying the indentation treatment had many light-stained streaks in the warp direction, and the appearance quality was very poor.

[Comparative Example 1] Using a ready-made calender roller as the indentation roller A on the woven fabric of Example 1, a roller temperature of 110 ° C under normal conditions, a pressure of 4 kg / cm ² , and a roller temperature of 130 ° C under severe conditions , Pressure 5
Except for performing the so-called calendering under the two conditions of kg / cm ² , all fabrics were trial-produced in the same manner as in Example 1. Transformation spots similar to the untreated fabric were generated under any conditions, Again, no uniform woven fabric of a plain appearance as obtained in Example 1 was obtained.

[0048]

Conventionally, polyester fibers in which an incompatible organic compound is blended with polyester are liable to have inhomogeneity in the fibril generation characteristics in the yarn forming process and the subsequent productizing process, and the uniformity of the fibril when formed into a product. It was extremely difficult to obtain a fibril appearance. In particular, when used for a warp of a woven fabric, spots such as warps tend to occur.

According to the present invention, a strong strain due to fine indentations is uniformly imparted to a woven fabric using a polyester fiber in which an incompatible organic compound is mixed with the polyester before the dissolution treatment is performed. Even if it is arranged in the warp, it can eliminate the non-uniformity of the fibrils received in the production process, and the product has a uniform fibril appearance without much labor and cost for yarn production and uniformity management at the time of production Is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an emboss roller used in the present invention.

FIG. 2 is a perspective view showing another example of an emboss roller used in the present invention.

FIG. 3 is a cross section 1 of an emboss roller used in the present invention.
Sectional drawing which shows an example.

[Explanation of symbols]

 W Projection width t Projection height

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Sadato Hashidate 3-4-1 Amihara, Ibaraki-shi, Osaka Teijin Limited Osaka Research Center (56) Reference JP-A-7-197375 (JP, A) JP-A-7-300767 (JP, A) JP-A-10-96122 (JP, A) JP-A-56-165069 (JP, A) JP-A-9-13268 (JP, A) Patent 3184102 (JP, B2) JP-B63-6667 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D03D 1/00-27/18 D06M 11/00-11/84 D06B 1/00-23 / 30 D06C 3/00-29/00

Claims (1)

(57) [Claims] 1. A woven fabric in which a polyester fiber in which an incompatible organic compound is mixed with a polyester is arranged in a warp yarn, a roller having a width in the circumferential direction of a roller of 0.4 to 0.4 mm along the warp direction of the woven fabric.
3.0mm, height 0.2 ~ 2mm, roller axis
Two protrusions extending continuously in the circumferential direction of the roller
/ Cm after intermittently pressurized by a roller having
A method for producing a fibrillated polyester fiber woven fabric, which comprises subjecting an alkali weight reduction treatment to fibrillation.