JPH04272242A - Flat yarn - Google Patents

Abstract

PURPOSE:To provide flat yarn retaining flat form despite consisting of filaments, also excellent in hydrophilicity and rich in soft feeling. CONSTITUTION:The objective flat yarns, interlaced filament yarns with a combination of hydrophobic thermoplastic synthetic fiber multifilament yarns and hydrophilic multifilament yarns. with said thermoplastic filaments mutually bonded in a linear or crossed manner and put to gear-crimped shaping. The present flat yarns are hygroscopic due to the hydrophilic fibers as well as rich in flexibility leading to softness as a whole, causing no impairment of its flatness as a whole because of consisting entirely of filaments, being rich in bulkiness and also excellent in form stability because of the above-mentioned combination with the thermoplastic fibers partly bonded and put to gear-crimped shaping.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention has water absorption properties even when using a hydrophobic synthetic fiber multifilament composed of a thermoplastic synthetic fiber multifilament and a hydrophilic non-thermoplastic multifilament. , and relates to a flat thread with excellent flexibility and shape stability.

0002

[Prior Art] When manufacturing flat yarn fibers, methods such as discharging spinning raw materials using a flat spinneret or slitting a film formed into a tape shape of a constant width are adopted. It has been known for a long time that the material is manufactured using woven fabrics, and has been widely used as a material for decoration. However, as the demand for fashionable clothing has increased in recent years, it has become more difficult to use it than for mere decoration. from,
It is beginning to attract attention as a new textile material for clothing. To use flat yarn as a textile material for clothing, multiple multifilament yarns are aligned and bonded together using a fiber solvent or resin. This improves the various disadvantages of fiber performance such as decreased mechanical strength, lack of stiffness, and loss of luster caused by the tendency of conventional flat yarns to crack vertically, and provides flat yarns without vertical cracks. It became like this,
It is especially widely used as a material for women's summer clothing.

0003

[Problem to be solved by the invention] However, although the above-mentioned flat yarn for clothing has excellent texture and gloss, it is difficult to avoid paper-like appearance because it is pressed when manufacturing the flat yarn. The threads lack a soft feel, and are not very good as a product. As a means of imparting a soft feel to such yarns, a flat yarn using spun yarn in combination is proposed in JP-A-60-59143, but when spun yarn is used, the constituent fibers are concentrated. Therefore, the difference in yarn diameter from the multifilament yarn becomes large, and the yarn tends to be thick as a whole and have a poor flatness.

[0004] Also, one of the drawbacks of clothing products using synthetic fibers is that they are non-hygroscopic, and as a way to improve this, it may be possible to mix in hydrophilic fiber yarns, but in this case too, if spun yarns are used, There are many problems such as poor permeability to fiber solvents, lack of flatness, reduced adhesive performance, and difficulty in maintaining the form of flat threads.

The object of the present invention is to provide a flat yarn that does not cause the above-mentioned problems despite being a flat yarn made of filaments, maintains its flat shape, and has excellent hydrophilicity and a rich soft feel. It is something to do.

[0006]

[Means for Solving the Problems] In order to solve the above problems, the thermoplastic synthetic fiber multifilament yarn and the hydrophilic multifilament yarn are mixed and form a partial or total entanglement. The filaments of the thermoplastic synthetic fibers, which are part of the fibers constituting the interlaced yarn, are bonded to each other in dots or lines and are formed into gear crimp shapes. It is important that the filament is a flat thread that is characterized by this. Hereinafter, the present invention will be explained in detail with reference to the drawings. FIG. 1 is a partially enlarged side view of an example of the appearance of a flat yarn according to the present invention, in which reference numeral 1 is a thermoplastic synthetic fiber filament, 2 is a hydrophilic fiber filament, and 3 is a flat yarn. This figure shows the mutually bonded parts of the thermoplastic synthetic fibers that make up the thread.

[0007] In the figure, the flat yarn is formed of an intertwined yarn consisting of a thermoplastic synthetic fiber filament 1 and a hydrophilic fiber filament 2 partially or totally intertwined, and the thermoplastic synthetic fiber filament 1 and the hydrophilic filament 2 are intertwined with each other, and the thermoplastic synthetic fiber filaments 1 have dotted or linear adhesive portions 3, and the entire yarn is gear-crimped.

As the thermoplastic synthetic fiber filament 1 used in the flat yarn of the present invention, commonly used thermoplastic synthetic fiber filaments such as acrylic fibers, polyester fibers, and nylon fibers may be used. As for the fiber filament 2, a known filament such as a rayon filament made of cellulose fiber is used.

The mixing ratio of the hydrophilic fiber filament 2 to the thermoplastic synthetic fiber filament 1 may be set as appropriate depending on the purpose, but sufficient water absorption and flexibility can be imparted by mixing the thermoplastic synthetic fiber filament 1 at a ratio of about 10 to 50%. can.

[0010] The interlaced yarn used in the present invention is an interlaced yarn obtained by subjecting a thermoplastic synthetic fiber filament yarn and a hydrophilic fiber filament yarn to generally known fluid processing such as taslan processing or interlacing processing. If the filaments formed by fluid processing are intertwined with each other, the filaments constituting the yarn are subjected to a restraining force and become flattened, making it difficult for yarn breakage to occur.

[0011] The adhesion between the filaments occurs when the surfaces of the thermoplastic synthetic fiber filaments 1 are bonded together by the fiber solvent of the thermoplastic synthetic fiber filaments 1. However, while the fiber solvent is not dried and removed, gear crimping is performed. By applying this, the yarn form of the flat yarn becomes stronger, and in this case, the amount of fiber solvent attached can be reduced.
It becomes possible to obtain softer flat threads.

[0012] The gear crimping may be carried out by a commonly used method, and the shape of the teeth of the gear may be varied, such as high, low, intermittent, etc., as necessary.

[0013] The flat yarn described above is a case in which one interlaced yarn is used, but it is also possible to use a plurality of interlaced yarns in parallel to form a flat yarn, if necessary.

Next, an example of the method for manufacturing the flat yarn of the present invention will be explained. Thermoplastic synthetic fiber multifilament yarn and cellulose fiber multifilament yarn are supplied to the turbulent fluid region in a aligned state, and subjected to taslan processing or interlacing processing to intertwine and entangle the constituent fibers of the yarn to form a single piece. A plurality of yarns 3 are arranged in a line adjacent to each other, passed through a fiber solvent solution of the thermoplastic synthetic fiber filament 1 to be impregnated with the solvent solution, and then run between squeezing rollers to remove excess liquid. At the same time, the solvent solution adhering to the yarn is squeezed out, the yarns are brought closer to each other, and after preliminary drying with a heating roller, the yarn is then made into a flat yarn by a heating press roller and then passed between heated gear teeth under pressure. It is obtained by crimping and shaping.

As the fiber solvent for the thermoplastic synthetic fiber filament 1, ethylene carbonate, dimethyl formamide, etc. are used in the case of acrylic filaments, and ethylene glycol, etc. are used in the case of polyester filaments.

[0016] The heating temperature of the gear teeth in the gear crimping type may be appropriately set within the range of not less than the softening point temperature and not more than the melting point temperature of the thermoplastic synthetic fiber filament 1 to be used. A stepwise heat treatment may also be performed. By applying gear crimp forming, the entire yarn becomes flat and at the same time its yarn form is fixed, resulting in a flat yarn with good shape stability. Moreover, it is also possible to process a plurality of flat yarns at the same time during gear crimping.

[0017]

[Function] At least some of the fibers constituting the flat yarn according to the present invention are hydrophilic fibers, and the hydrophilic fibers themselves have hygroscopic properties, and at the same time, since the hydrophilic fibers are not bonded to each other, the yarn Provides flexibility throughout and maintains a soft texture. In addition, since all of the constituent fibers are filaments, the yarn itself tends to take a flat shape, and then gear winding is performed around the entire yarn under conditions where the thermoplastic synthetic fiber filaments are bonded in spots or in a line with a solvent or the like. At the same time, the thermoplastic synthetic fiber filaments are bonded at points or in a linear manner to each other, giving the yarn a flat yarn shape through compression molding. It also satisfies the form stability derived from the strip structure.

[0018]

[Example] To explain a specific example of the present invention, acrylic filament yarn 300d/80f and rayon filament yarn 300d/30f are supplied to an interlace nozzle, air pressure is 2.5 kg/cm2, and processing speed is 200 m.
When the present invention was carried out under the following conditions after the fibers were mixed and entangled at a speed of 1/min, the whole became a shaped flat yarn with adhesive parts 3 scattered as shown in Fig. 1. A gear-crimped flat yarn was obtained which was soft and pliable and had excellent hydrophilicity, unlike the coarse, hard, paper-like yarn.

Solvent: ethylene carbonate 3%
Aqueous processing temperature: Pre-drying roller
180℃ press roller 230℃ gear roller 245℃ machining speed
:
60m/min

[0020]

Effects of the Invention As explained in detail above, the flat yarn of the present invention contains hydrophilic multifilament fibers even if hydrophobic synthetic fiber filaments are used in some parts, and at the same time, the hydrophilic fibers themselves contain hydrophilic multifilament fibers. Since it is not bonded, it is possible to have hygroscopicity and flexibility at the same time, resulting in a soft texture. Moreover, since all the fibers forming the yarn are composed of filaments, the flatness of the yarn as a whole is not impaired, and since the entire yarn is subjected to gear crimping, it is highly bulky. It is a flat thread with excellent morphological stability.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of the appearance of a flat thread according to the present invention.

[Explanation of symbols]

1 Thermoplastic synthetic fiber filament 2
Hydrophilic filament 3 Adhesive part

Claims (1)

[Claims] Claim 1: A thermoplastic synthetic fiber multifilament yarn and a hydrophilic multifilament yarn are formed into interlaced yarns in a mixed fiber state and partially or entirely forming an intertwined part, and the intertwined 1. A flat yarn characterized in that the individual filaments of the thermoplastic synthetic fibers, which are part of the fibers constituting the yarn, are bonded to each other in dots or lines to form a gear crimp.