JPH07238430A - Flat yarn having uneven shape in thickness direction and in width direction and production thereof - Google Patents

Abstract

PURPOSE:To provide flat yarn rich in the change of the shape, giving an excellent lustrous feeling, and useful for clothing. CONSTITUTION:The flat yarn comprises substantially filmy flat parts 1 in which individual filaments composing the yarn are strongly bonded to each other and collected, and bulkily collected flat part 2 in which the individual filaments composing the yarn are weakly bonded to each other and collected in a thick state, the flat parts 1 and the flat parts 2 being alternately formed, and the widths of the bulkily collected flat parts being smaller than those of the filmy flat parts, and has uneven shapes in the thickness direction and in the width direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat yarn for garments, which is rich in morphological changes and has an excellent glossiness, and a method for producing the same.

[0002]

2. Description of the Related Art Flat yarns are light and rich in gloss because they can increase the specific volume, and are used as women's clothing for summer.
Generally, spun yarns and multifilament yarns of thermoplastic synthetic fibers are bundled and used as flat yarns by heating and pressing, but in order to change the appearance of the fabric, the multifilament yarns that are false twist crimped are processed. A flat yarn having a more varied appearance such as a flat yarn or an uneven flat state is preferred and used. (JP-A-61-
(83335 publication)

[0003]

However, in recent years, as fashion tastes have increased, there has been a growing demand not only for summer clothing applications but also for a wide range of season clothing, and a variety of appearances and glossiness are required. In addition to the above, there are many unsolved problems such as relief of coarse and hard feeling as texture and elimination of loose spots peculiar to flat yarn.

The present invention has solved the above problems, and an object of the present invention is to provide a flat yarn which has a soft texture while being flat and which is rich in appearance change.

[0005]

DISCLOSURE OF THE INVENTION The present invention comprises a thermoplastic synthetic fiber yarn bundled in a tape shape, and the individual fibers constituting the yarn bundle are firmly bonded to each other and bundled. The substantially film-shaped flat portion and the bulky-focused flat portion in which the individual fibers constituting the yarn are lightly adhered and bundled in a state having a thickness, Are formed alternately along the longitudinal direction of the, and the width of the bulky converging flat portion is narrower than the width of the film flat portion. A flat yarn having a shape is defined as the gist of the first invention, and a thermoplastic synthetic fiber yarn bundled in a tape shape is pressed by a heated roll pair having a gear-shaped protrusion on at least one side. For producing flat yarn having unevenness in the thickness and width directions It is an gist of the second invention.

The present invention will be described below with reference to the drawings. Figure 1
FIG. 1 is a perspective view of an appearance of a flat yarn having an uneven shape in a thickness direction and a width direction of the present invention (hereinafter, simply referred to as an uneven flat yarn),
Along the longitudinal direction of the thermoplastic fiber yarn, the individual fibers constituting the yarn are firmly adhered and bundled, and the film-shaped flat portion 1 having a substantially film-like shape and a certain amount of bulkiness In the bundled state in which the filaments are left, the bulky flat portions 2 in which the individual constituent fibers constituting the yarn are lightly bonded and have a thickness are alternately formed, and as a result, a film-like shape is formed. The flat portion 1 and the bulky flat portion 2 have an uneven shape along the longitudinal direction of the yarn.

FIG. 2 is a plan view of the uneven flat yarn of the present invention. The width B of the film-shaped flat portion 1 is wider than the width D of the bulky flat portion 2. That is, the uneven flat yarn of the present invention has a change in the yarn diameter in the thickness direction and the width direction of the yarn along the longitudinal direction of the yarn, and both changes are staggered.

The length A of the film-shaped flat portion 1 and the length C of the bulky flat portion 2 may be appropriately set as needed.

Next, the thermoplastic synthetic fiber yarn bundled into a tape used in the present invention will be described. As the thermoplastic synthetic fiber yarn bundled in a tape shape, a state in which the thermoplastic synthetic fiber multifilament yarn or spun yarn such as acrylic, nylon, polyester, etc. used for clothing and the like is aligned in parallel Any fiber may be used as long as the fibers are adhered to each other by heating or a solvent to have a flat shape. In particular, acrylic fibers are preferable because they can be easily bonded by a solvent and can be bonded in a state where the yarn has flexibility. In this case, as the acrylic fiber, it is not necessary that all the constituent fibers are acrylic fibers,
You may mix with other fibers in the range which can form the target flat yarn.

When an acrylic filament yarn is used as the thermoplastic synthetic fiber yarn bundled in a tape shape, the film-shaped flat portion 1 is easily formed, and the film-shaped flat portion 1 and the bulky flat portion are formed. It is possible to form a flat yarn having a large contrast with No. 2.

Furthermore, if the fineness of the individual filaments constituting the acrylic multifilament yarn to be used is 1 denier or less and the number of constituent filaments is 300 or more, a soft touch uneven flat yarn having excellent flexibility can be obtained. On the other hand, if the fineness of the individual filaments that make up the multifilament yarn to be used is 5 denier or more and the number of constituent filaments is 100 or less, a soft and soft feeling with a softness is obtained. It is possible to form the uneven flat yarns that it has.

Therefore, by using an acrylic multifilament yarn having a specific fiber diameter and number of fibers, the flexibility is used as a base, and a wide range of irregularities from highly flexible to mildly hard It can be a flat yarn.

Next, a method for manufacturing the uneven flat yarn of the present invention will be described with reference to the drawings. FIG. 3 is a process diagram for continuously producing the uneven flat yarn of the present invention from a thermoplastic synthetic fiber yarn.

3 is a supply roll pair, 4 is a solvent tank, 5 is a fiber solvent, 6 is a solvent squeezing roll pair, 7 is a fiber array guide,
8 is a preheating roll, 9 is a shaping roll pair, 10 is a dryer, 11 is a winding roll pair, Y is a thermoplastic synthetic fiber yarn,
Y'is a thermoplastic synthetic fiber yarn bundled on the tape,
Y "indicates uneven flat yarns, respectively.

The thermoplastic synthetic fiber yarn Y sent out from the supply roll pair 3 passes through a solvent tank 4 containing a fiber solvent 5 of the thermoplastic synthetic fiber yarn Y, and a solvent squeezing roll pair 6,
The amount of fiber solvent is appropriately adjusted by the fiber arrangement guide 7, and a thermoplastic synthetic fiber yarn Y ′ bundled into a tape is obtained. Subsequently, the thermoplastic synthetic fiber yarn Y ′ bundled into a tape is preheated by the preheating roll 8 and then
The fiber solvent 5 remaining after being shaped by the shaping roll pair 9 is removed by the dryer 10 and wound as the uneven flat yarn Y ″ of the present invention.

As the fiber solvent 5 used in the present invention, one suitable for each fiber may be used. For example, ethylene carbonate, dimethylformamide, etc. are used for acrylic fibers, acetone, methanol, etc. are used for acetate fibers, and ethylene glycol, etc. are used for polyester fibers.

As the fiber array guide 7 used in the present invention, a normal guide may be used without any particular limitation. However, if a triangular cross-section guide is used, it becomes easy to tension and scrape the fibers on the guide, and the fibers adhere excessively. This is convenient because the fiber solvent 5 is squeezed out and the amount of solvent adhered is uniform. In particular,
When a multifilament yarn is used, it is effective because individual filament fibers can be easily arranged in parallel.

The preheating roll 8 used in the present invention is not particularly limited as long as it is generally used. If the temperature of the preheating roll 8 is set so that the thermoplastic synthetic fiber yarn Y ′ bundled in a tape shape during the shaping by the shaping roll pair 9 is immediately raised to the temperature of the shaping roll pair 9. Good.

In the present invention, it is necessary that at least one of the pair of shaping rolls 9 is a heated roll pair having a gear-shaped protrusion (FIG. 3 shows only one side of the gear-shaped protrusion. Showing a roll with. Thermoplastic synthetic fiber bundled in tape form Yarn in flat form Y '
Is heated and pressed by a pair of shaping rolls 9 so that the pressing portion becomes a film shape and is spread in the width direction, and the film-shaped flat portion 1 is applied to a flat yarn having a width wider than the bulky flat portion 2. Typed.

The length A of the film-shaped flat portion 1 and the length C of the bulky flat portion 2 can be changed by changing the circumferential length of the projection of the shaping roll pair 9 and the projection spacing.

When both rolls of the shaping roll pair 9 have gear-like protrusions, it is essential to arrange the rolls so that the protrusions press against each other without the gears meshing with each other. . When the gears mesh with each other, the uneven flat yarn of the present invention cannot be obtained.

In the present invention, the temperature of the shaping roll pair 9 is determined by the type, the fiber diameter, the number of constituent filaments, etc. of the thermoplastic fiber yarns constituting the thermoplastic synthetic fiber yarns Y'converged in a tape shape. Although it needs to be adjusted, for example, it can be set with reference to the softening point of the fiber described on page 288 of "Textile Handbook 1993" (edited by Japan Chemical Fiber Association). Further, the pressure at the time of shaping needs to be adjusted depending on the type, the fiber diameter, the number of constituent filaments, etc. of the thermoplastic fiber yarns forming the thermoplastic synthetic fiber yarns Y ′ bundled in a tape shape. 0.5 to 5 kg / cm ² is suitable. If the temperature of the shaping roll pair 9 and the pressure at the time of shaping are equal to or lower than appropriate values, the shaping is not sufficient.

The dryer 10 used in the present invention is not particularly limited as long as it is any generally used dryer. The set temperature of the dryer 10 may be set to a temperature at which the fiber solvent 5 volatilizes.

In the above description, the method for producing a flat yarn using a single yarn was described, but a plurality of yarns may be produced at the same time in view of production efficiency, and a plurality of yarns may be combined. It is also possible to use flat yarn.

The present invention will be specifically described below with reference to examples.

[0026]

【Example】

(Example 1) thermoplastic synthetic fiber yarn acrylic filament 600d / 2,000f yarn speed 80m / min solvent, concentration ethylene carbonate 3.5% aqueous solution preheating roll temperature 8a 130 ° C 8b 140 ° C 8c 160 ° C 8d 170 ° C 8e 230 ℃ Molding gear specification Projection spacing 20 mm Pressing section length 2 mm Gear, roll diameter 150 mmφ Molding roll pair temperature 235 ℃ Molding pressure 2.0 kg / cm ²

Under the above manufacturing conditions, the uneven flat yarn having a length of the film portion of 1.8 mm, a width of 1.6 mm, a length of the bulky flat portion of 10.8 mm and a minimum width of 0.6 mm. was gotten. Fabrics made using this have a mirror-like gloss of the film-shaped flat portion, a feeling of coarseness and hardness that is brought about by the light adhesion of the bulky flat portion, and a flexible texture effect that is part-divisional, and is effective for surface changes. It was rich and lightweight.

(Example 2) Thermoplastic synthetic fiber yarn Polyester filament 300d / 650f Yarn speed 24m / min Solvent, concentration Polyethylene glycol (molecular weight 1,000) 3% aqueous solution Preheating roll temperature 8a 90 ° C 8b 100 ° C 8c 160 ℃ 8d 190 ℃ 8e 210 ℃ Molding gear specifications Projection spacing 10 mm Pressing part length 1 mm Gear, roll diameter 100 mm φ Molding roll pair temperature 220 ℃ Molding pressure 1.0 kg / cm ²

In the thus obtained uneven flat yarn, the length of the film portion is 1.1 mm and the width is 0.8 mm, and the length of the bulky flat portion is 10.8 mm and the minimum width is 0. .2
mm, the fabric made using this is a mix of the mirror gloss of the film-shaped flat portion and the mild adhesive effect of the bulky flat portion, with a moderate waist, a refreshing, lightweight gloss change, and appearance. It was very varied.

Example 3 Thermoplastic Synthetic Fiber Yarn Mixed Spinning of Ultrafine Acrylic Short Fibers and Cotton Ultrafine Acrylic Short Fibers 0.8d × 38 mm 70% Cotton 30% Yarn Speed 35 m / min Solvent, Concentration Ethylene Carbonate 2.2 % Aqueous solution Preheating roll temperature 8a 100 ° C. 8b 140 ° C. 8c 160 ° C. 8d 180 ° C. 8e 200 ° C. Molding gear specifications Convex spacing 10 mm Pressing part length 2 mm Gear, roll diameter 100 mm φ Molding temperature 245 ° C. Molding pressure 2.3 kg / cm ²

In the thus obtained uneven flat yarn, the length of the film portion is 1.8 mm and the width is 0.8 mm, and the length of the bulky flat portion is 10.5 mm and the minimum width is 0. .2
The fabric made of this material has a synergistic effect such as fluff and twist peculiar to spun yarn, and water absorption, moisture absorption, and function of cotton, in addition to the above-mentioned mixing effect, and has a refreshing feeling and light weight. It was a feeling.

(Example 4) Thermoplastic synthetic fiber yarn Acrylic filament 600d / 120f Yarn speed 75m / min Solvent, concentration Ethylene carbonate 3.0% aqueous solution Preheating roll temperature 8a 130 ° C 8b 140 ° C 8c 160 ° C 8d 190 ° C 8e 235 ° C. Molding gear specifications Projection interval 10 mm Pressing part length 1 mm Gear, roll diameter 100 mm φ Molding temperature 235 ° C. Molding pressure 2.2 kg / cm ²

In the thus obtained uneven flat yarn, the length of the film portion is 1.2 mm, the width is 1.7 mm, and the length of the bulky flat portion is 9.3 mm, and the minimum width is 0. .4m
The fabric produced by using the film has a flat luster and a film-like flatness, and a moderate dry-touch feel and flat yarn properties brought about by the light adhesion of the bulky flat portion. It had a firm, elastic feel and a lightweight feel with a rich surface effect.

Example 5 Thermoplastic Synthetic Fiber Yarn Acrylic Filament 400d / 40f (Full Dal) Yarn Speed 85m / min Solvent, Concentration Ethylene Carbonate 3.5% Aqueous Solution Preheating Roller Temperature 8a 130 ° C 8b 140 ° C 8c 160 ° C 8d 200 ° C. 8e 235 ° C. Molding gear specifications Projection interval 10 mm Pressing part length 2 mm Gear, roll diameter 100 mm φ Molding temperature 235 ° C. Molding pressure 2.5 kg / cm ²

In the thus obtained flat yarn, the length of the film portion is 2.2 mm and the width thereof is 1.6 mm, and the length of the bulky flat portion is 9.5 mm and the minimum width is 0. 5 mm, and the fabric made using this has a film-shaped flat portion and a bulky flat portion that have a relatively firm film-like and adhesive property, and have a dry straw-like appearance, texture, and waist. It was unique with a strong, lightweight feel.

[0036]

EFFECTS OF THE INVENTION The uneven flat yarn of the present invention has a film portion and a bulky portion coexisting, has a rich glossy feeling, and has a morphological difference in both the thickness direction and the width direction, In addition, it has a large change in appearance and morphology, which has both a soft feel and a hard feel, which cannot be achieved by conventional flat yarns.

[Brief description of drawings]

FIG. 1 is a perspective view of the appearance of an uneven flat yarn of the present invention.

FIG. 2 is a plan view of the uneven flat yarn of the present invention.

FIG. 3 is a process diagram for continuously producing the uneven flat yarn of the present invention from a thermoplastic synthetic fiber yarn.

[Explanation of reference numerals] 1 film-shaped flat portion 2 bulky flat portion 3 supply roll pair 4 solvent tank 5 fiber solvent 6 solvent squeezing roll pair 7 fiber array guide 8a to e preheating roll 9a, b shaping roll 10 dryer 11 Winding roll pair A Length of film-shaped flat portion B Width of film-shaped flat portion C Length of bulky and focused flat portion D Width of bulky and focused flat portion Y Thermoplastic synthetic fiber yarn Y ' Thermoplastic synthetic fiber yarn bundled in tape shape Y "Uneven flat yarn

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Toshio Yamazaki 1 2217-2, Hirosawa-cho, Kiryu-shi Asahi Sewing Co., Ltd.

Claims (7)

[Claims] 1. A substantially film-shaped flat surface comprising a thermoplastic synthetic fiber yarn bundled in a tape shape, wherein individual fibers constituting the yarn bundle are firmly bonded to each other and bundled. And the bulky and concentric flat portion in which the individual fibers constituting the yarn are lightly adhered and bundled in a state having a thickness, are alternately arranged along the longitudinal direction of the yarn. A flat yarn having an uneven shape in the thickness direction and the width direction, characterized in that the width of the bulky and convergent flat portion is smaller than the width of the film flat portion. 2. The flat yarn having irregularities in the thickness direction and the width direction according to claim 1, wherein the thermoplastic synthetic fiber yarn is an acrylic multifilament yarn. 3. The uneven shape in the thickness direction and the width direction according to claim 2, wherein the fineness of each filament constituting the acrylic multifilament yarn is 1 denier or less, and the number of constituent filaments is 300 or more. Flat yarn. 4. The uneven shape in the thickness direction and the width direction according to claim 2, wherein the fineness of each filament constituting the acrylic multifilament yarn is 5 denier or more, and the number of constituent filaments is 100 or less. Flat yarn. 5. A thermoplastic synthetic fiber yarn bundled in a tape shape is pressed by a pair of heated rolls having at least one gear-shaped protrusion, so that an uneven shape is formed in a thickness direction and a width direction. A method for producing a flat yarn having 6. The thickness direction and width according to claim 5, wherein an acrylic multifilament yarn having a fineness of constituent filaments of 1 denier or less and a number of constituent filaments of 300 or more is used as the thermoplastic synthetic fiber yarn. A method for producing a flat yarn having an uneven shape in the direction. 7. The thickness direction and width according to claim 5, wherein an acrylic multifilament yarn having a fineness of constituent filaments of 5 denier or more and a number of constituent filaments of 100 or less is used as the thermoplastic synthetic fiber yarn. A method for producing a flat yarn having an uneven shape in the direction.