JPH0545015U - Clothing - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a garment capable of maintaining the initial fit for a long period of time. [Composition] Training wear 1 worn on the upper half of the body
A garment in which the collar portion 2, the sleeve portion 3, and the hem portion 4 are manufactured by using a copolyester fiber having a shape memory capacity, and the shape is memorized by performing heat-molding processing on these portions.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a garment in which a collar portion, a sleeve portion, and a hem portion have shape memory ability.

[0002]

[Prior Art]

 Traditionally, clothes such as training wear and sweaters have been made in consideration of stretchability and heat retention, and the materials used are fibers such as polyester, nylon, cotton, wool, and acrylic.

When these clothes are worn, the collar, sleeves, and hem are fitted to the body at first, but by wearing the clothes repeatedly or washing the clothes, the body stretches and the body is stretched. It has the drawback of not fitting. To eliminate this drawback, some collars, sleeves, and hem have elastic threads such as rubber threads and spantex woven, but they have the drawback that they are too tight at the beginning of wearing and stretch over time.

[0004]

[Problems to be solved by the device]

 The present invention solves such a problem, and an object of the present invention is to provide a garment capable of maintaining the initial fit property for a long period of time.

[0005]

[Means for Solving the Problems]

 In order to solve this problem, the present invention uses a copolyester fiber having a shape memory capacity to knit a portion that requires appropriate tightening, and heat-molds this portion to memorize the shape. Is the gist.

Next, the configuration of the present invention will be described in detail. The shape-memory copolyester used in the present invention has the following characteristics. (A) After melt molding, the shape is memorized when crystallized in a heating atmosphere. (B) When an external force is applied in a temperature range higher than the glass transition point and lower than the temperature at which the shape is memorized, it deforms relatively easily. (C) When the temperature is below the glass transition point while maintaining the deformed shape, the deformed shape is fixed (shape fixing ability). (D) Furthermore, when a temperature higher than the glass transition point is applied without applying an external force, the shape recovers to the memorized shape (shape recovery ability).

The glass transition temperature of the copolyester is preferably 80 ° C. or lower. If the glass transition temperature exceeds 80 ° C, the temperature required for shape recovery is too high to be practical. When the glass transition point is 45 ° C or higher, the copolyester fiber used for the part of the present invention that requires appropriate tightening up to room temperature or near body temperature is the same flexible wind as ordinary polyethylene terephthalate continuous fiber. When the temperature reaches the glass transition point, the state returns to the memorized state. When the glass transition temperature is lower than room temperature or body temperature, the temperature is higher than the glass transition point during normal use, so that the waist is soft, and there is a tendency to return to a state that is always remembered. If the shape of the knitted polypolyester fiber according to the invention is memorized in advance by ironing at a high temperature without wrinkles, wrinkles will be more difficult to use.

Further, the melting point of the copolyester needs to be 150 ° C. or higher. If the melting point is less than 150 ° C, heat setting for preventing shrinkage during heating of the fiber or high temperature dyeing becomes difficult, which is not practical.

Furthermore, the single fiber strength of the copolyester fiber must be 2.5 g / denier or more. If the single fiber strength is less than 2.5 g / denier, productivity and quality will deteriorate due to single fiber breakage during the knitting and weaving process, which is not practical.

Next, as a method for obtaining a copolyester fiber having a shape memory ability, an aromatic polyester segment (hard segment) and an aliphatic polyester segment (soft segment) are copolymerized at an appropriate ratio with a polymer. And a method in which an aromatic polyester segment (hard segment) and a polyalkylene glycol segment (soft segment) are copolymerized at an appropriate ratio to obtain a polymer, but the former is preferable.

The aromatic polyester segment means a polyester segment having at least one aromatic ring in the repeating unit of polyester, and the aliphatic polyester segment means that the repeating unit of polyester is composed only of an aliphatic compound. Refers to polyester segments.

Examples of the aromatic monomer component constituting the hard segment include terephthalic acid, isophthalic acid, bisphenol A, dicarboxylic acids such as P-oxybenzoic acid, diols and hydroxycarboxylic acids.

Examples of the aliphatic monomer component that constitutes the hard segment with the aromatic monomer or the soft segment itself includes, for example, adipic acid, azelaic acid, dodecanedioic acid, eicosanedioic acid, ethylene glycol, Examples thereof include butanediol, hexanediol, dicarboxylic acids such as ε-caprolactone, diols, and oxycarboxylic acids (or lactones). Polyalkylene glycol such as polyethylene glycol and polytetramethylene glycol may also function as the soft segment component.

As the hard segment, a polyester having an ethylene terephthalate unit or a butylene terephthalate unit is preferable, but an ethylene terephthalate unit is most preferable in view of economy and physical properties.

As the soft segment, a long-chain aliphatic dicarboxylic acid such as azelaic acid, sebacic acid, dodecanedioic acid, etc., and particularly an ester unit of an aliphatic dicarboxylic acid having 6 or more carbon atoms and ethylene glycol is preferable.

In the copolyester used in the present invention, the soft segment acts as an intramolecular plasticizer to accelerate the crystallization of the polymer, and also causes the entanglement of the crystallized portions to generate a fixed point. Seem. Even a copolyester consisting of only these hard segments and soft segments can be made into a polyester having sufficient shape memory capacity.However, even if a molecular structure capable of intermolecular crosslinking is introduced, the rubber will be vulcanized to form a shape. Similar to the memorizing principle, it can function as a fixing point for fixing the shape to be memorized by cross-linking the polyester molecules at important points. Specific examples of the molecular structure capable of intermolecular crosslinking include a structure in which a monomer component having an unsaturated bond is copolymerized to introduce an unsaturated bond into the main chain of the polyester. Intermolecular cross-linking becomes possible by cleaving this unsaturated bond by an appropriate means when the shape is fixedly memorized.

Examples of the monomer component capable of being copolymerized with polyester and having an unsaturated bond include, for example, maleic anhydride, maleic acid, chloromaleic acid, itaconic acid, fumaric acid, citraconic acid, hettic acid, hettic anhydride, Unsaturated dicarboxylic acids or unsaturated diols such as 2-butene-1,4-diol and 3-butene-1,2-diol may be mentioned.

Copolymerizing a trifunctional or higher functional monomer component with polyester is also an effective means. In this case, when the shape is fixed and stored, intermolecular crosslinking can be performed by adding and reacting a crosslinking agent having a hydroxyl group, a carboxyl group, an isocyanate group, an amino group or the like of polyester.

The copolyester according to the present invention may optionally be copolymerized with other auxiliary raw materials as long as the object of the present invention is not impaired, and various additives are included. May be.

The constituent components of the monomers constituting the polyester used in the present invention and the copolymerization ratio thereof can be selected within a wide range, but in consideration of economical efficiency, versatility, physical properties and the like, for example, the following are preferable. That is, terephthalic acid as the dicarboxylic acid is 50 to 95 mol%, preferably 60 to 90 mol%, dodecanedioic acid is 5 to 50 mol%, preferably 10 to 40 mol%, and ethylene glycol is 100 mol% as the diol. It is a polyester used in the ratio of. In this example, the repeating unit consisting of ethylene glycol and terephthalic acid has a hard segment, and the repeating unit consisting of ethylene glycol and dodecanedioic acid has a soft segment.

The copolyester fiber used in the present invention may be produced by the melt-spinning method and the drawing method, like the general-purpose polyester fiber. Spinning conditions and stretching conditions differ depending on the physical properties of the shape-memory polyester used, but can generally follow conventional techniques. That is, spinning may be performed using a general-purpose spinning device or a composite spinning device. The spun fiber is stretched or heat-treated continuously or in another step, if necessary, and subjected to higher-order processing such as crimping or chemical treatment. Further, during spinning, additives such as a stabilizer, a fluorescent agent, a pigment, and a reinforcing material may coexist.

The fiber shape of the copolyester fiber may be a circular cross section, an irregular shape such as a triangular cross section, or a hollow fiber. The obtained copolyester fiber can be made into a long fiber with good productivity by a conventional method, and can be knitted or woven or dyed in the same manner as ordinary polyethylene terephthalate.

The fibers used in the portion of the present invention that requires appropriate tightening are polyester fibers such as ordinary polyethylene terephthalate and polybutylene terephthalate that do not have a shape memory ability, and nylon, as long as the shape memory ability is not impaired. It may be a blend of fibers, rayon fibers, synthetic fibers such as wool, cotton and hemp, recycled fibers and natural fibers.

By the way, the clothing of the present invention refers to not only training wear and sweaters, but also underwear such as underpants and socks. In training wear and sweaters, the collar, sleeves, and hem are referred to as underpants. In the underwear and socks, the ankles may be knitted using the copolyester fiber having the shape memory ability, but the entire garment may be knitted using the copolyester fiber having the shape memory ability.

[0025]

[Action]

 As described above, the part of the clothing that requires proper tightening is made of copolyester fiber having shape memory capacity, and the part is heat-molded to memorize the required shape. Even if elongation occurs, the shape can be restored to the memory shape by warm water treatment during washing or heat during drying, and the initial fit can be maintained for a long time.

[0026]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. The characteristic values of the copolyester in the examples are measured as follows. (1) Intrinsic viscosity An equal weight mixture of phenol and ethane tetrachloride was used as a solvent, and measurement was performed at a temperature of 20 ° C. (2) Melting point and glass transition point Using a differential scanning calorimeter (manufactured by Perkin Elmer Co., Ltd., DSC-2 type), measurement was performed at a temperature rising rate of 20 ° C / min.

First, the method for producing the copolyester fiber used in the present invention will be described. To bis (β-hydroxyethyl terephthalate) and its oligomer 45.0 kg obtained by the esterification reaction of terephthalic acid and ethylene glycol, 2. Dodecanedioic acid 5.8 kg, maleic acid 0.4 kg, ethylene glycol 9.0 kg, and tetrabutyl titanate 26 g as a catalyst were added, and the mixture was heated at 250 ° C. under nitrogen gas suppression 3. The esterification reaction was carried out at 6 kg / cm ² for 2 hours. The copolymerization amount of dodecanedioic acid was 10 mol%, and the copolymerization amount of maleic acid was 1.5 mol%.

The obtained esterified product was transferred to a polycondensation reactor and subjected to polycondensation reaction at 280 ° C. and 0.4 torr for 3 hours to obtain a copolyester. The copolyester obtained had a glass transition point of 49 ° C., a melting point of 232 ° C. and an intrinsic viscosity of 0.65.

After the copolyester chips are dried under reduced pressure, they are melted using an ordinary melt spinning device, passed through a spinneret with 24 spinning holes, and spun at a spinning temperature of 270 ° C. at 1500 m / min. I rolled it up. Next, it was drawn at a temperature of 90 ° C. and a draw ratio of 3.2 and heat set at 150 ° C. to obtain a drawn yarn of 150 d / 24 f. No problems such as yarn breakage occurred, and the spinnability was good. Using this drawn yarn, a collar portion 2, a sleeve portion 3 and a hem portion 4 of the training wear 1 to be worn on the upper half of the body shown in Fig. 1 were produced. Specifically, the collar portion 2, sleeve portion 3, and hem portion 4 are made of two copolyester fibers having a shape memory capacity of 150 denier and 24 filaments, which are arranged in a 20-gauge, 30-inch knitted fabric. The machine knitted into a normal milling structure was cut and sewn to the training wear body 5. The training wear main body 5 may be knitted using a copolyester fiber having a shape memory ability, or may be knitted using a fiber such as general polyester, nylon, cotton, wool, or acrylic. Then, the portion knitted using the copolyester fiber having the shape memory capacity is subjected to a heat-molding process at a temperature of 180 ° C. to store a required shape.

[0030]

[Effect of the device]

 As described above, according to the present invention, a portion of clothing that needs to be properly tightened is made from a copolyester fiber having a shape-memory ability, and the portion is subjected to a heat-molding process to memorize the required shape. Therefore, even if elongation occurs due to wearing, the shape can be restored to the memory shape by warm water treatment during washing or heat during drying, and the initial fit can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a front view of training wear worn on the upper half of the body according to an embodiment of the present invention.

[Explanation of symbols]

 1 Training wear 2 Collar part 3 Sleeve part 4 Hem part 5 Training wear body

Claims (1)

[Scope of utility model registration request] 1. A garment characterized by knitting a portion that needs to be appropriately tightened using a copolyester fiber having a shape-memory ability, and subjecting this portion to a heat-molding process to memorize the shape.