KR100842197B1 - Cup consisting of composite fiber structure and production method therefor - Google Patents

Abstract

A non-elastic polyester crimped short fiber aggregate is used as a matrix, and is composed of a thermoplastic elastomer and an inelastic polyester having a melting point of at least 40 ° C. lower than the melting point of the polyester polymer constituting the short fiber. After laminating and bonding a knitted fabric made of polyester with a polyester adhesive, which is a hot melt type resin binder, to both surfaces of a sheet-shaped polyester-based elastic fiber structure in which exposed elastic composite fibers are dispersed and mixed, The composite fiber structure is thermoformed into a curved shape by die molding to obtain a cup.

Description

Cup made of composite fiber structure and its manufacturing method {CUP CONSISTING OF COMPOSITE FIBER STRUCTURE AND PRODUCTION METHOD THEREFOR}

The present invention relates to a cup made of a composite fiber structure and a manufacturing method thereof. In particular, the present invention relates to a breast cup and a method of manufacturing the same, which have a high shaping function to adjust the shape of the breast, which is excellent in wearing comfort, and which has a high durability of washing.

Bras, long-line bras, body suits, three-in-one, bra teddys, bra chemoles, bra slips, underwear, such as biscuits, and cups to cover breasts such as leotards, swimwear, evening dresses, and biscuit types. Women's clothing having a cup) is widely used as women's clothing. These cups have been manufactured and provided on the market with the following three.

The most common is a cup made of polyurethane which has been used because of its good elasticity. In the cup made of polyurethane, the cup member bent from a large urethane block through a process such as slicing and cutting is produced as an integral structure. However, there have been problems such as a yellowing inherent to urethane, a problem of light resistance, a problem of dry cleaning durability, and a wet feeling caused by lack of breathability. In particular, the problem of yellowing is serious, and therefore, when the urethane cup is actually used, it is actually used to cover and cover it with several layers or cloths so that the yellow color due to yellowing cannot be seen from the outside.

Moreover, various medical fibers are recovered and recycled from the recent trend of ecology. In general medical care and the like, since various materials are in a mixed state, they are usually semi-shape and are often recycled to industrial mop or farm gloves. However, in the conventional cup whose main member is a urethane pad, the recycling is also impossible and it was forced to incinerate or landfill. However, when incinerated, there is a problem of generating toxic gas such as cyan gas, and when disposed of in landfill, there is only a disposal method that is not good for the global environment in any case, such as pressurizing an industrial waste treatment plant. It can be a problem.

Another breast cup, which is made of fibers, is a thin sheet of nonwoven fabric, prepared by punching several sheets of different sizes in the form of a predetermined size, and forming four to eight layers of the sheet to form a curved shape. It is produced by bonding each other with each other with an adhesive and thermoforming, or a method of obtaining a cup by mixing so-called binder fibers to laminate card webs and melting and bonding the binder fibers during thermoforming. have.

However, these cups had a large change in shape due to washing and the like, and had problems in form retention.

In addition, Japanese Patent Laid-Open No. 5-195397 discloses a method of manufacturing a pad material by thermoforming a single cushion structure. In this method, formability is improved because the pad is molded from a single structure. However, when the pad member is manufactured by attaching the outer fabric and the lining to a single structure, the pad member does not cause a change in the texture, and a pad material having a softer feel and a shape retaining property is known.

Disclosure of the Invention

An object of the present invention is to solve the problems of the prior art, it has a high elasticity, a high feel, excellent breathability, excellent washing durability and shape retention, and a mold-formed outer cup and lining breast cup And a method for producing the same.

That is, according to the present invention, the polyester woven fabric is composed of a composite fiber structure in which a polyester knitted fabric is bonded to a polyester adhesive on both surfaces of a polyester-based elastic fiber structure having a structure shown in the following (1) to (5). A cup made of a composite fiber structure

(1) A non-elastic polyester crimped short fiber aggregate is used as a matrix, and is composed of a thermoplastic elastomer and an inelastic polyester having a melting point of at least 40 ° C. lower than the melting point of the polyester polymer constituting the short fiber, and the thermoplastic elastomer is at least The elastic composite fiber exposed to the fiber surface is dispersed and mixed,

(2) these elastic composite fibers have a heat-bonding point with each other in the crossed state,

(3) It has a hot-bonding point formed by heat fusion in the state where this elastic composite fiber and this inelastic polyester crimped short fiber intersect,

(4) The mixing ratio of this elastic composite fiber and this inelastic polyester crimped short fiber is 10: 90-50: 50, and

(5) a polyester elastic fiber structure having a fineness of 2 to 15 dtex of the inelastic polyester crimped short fiber, and

On both sides of the sheet-like polyester-based elastic fiber structure composed of the structures represented by the following (1) to (5), a knitted fabric made of polyester is laminated and bonded by a polyester adhesive, which is a hot melt type resin binder, to form a composite fiber structure. And then the composite fiber structure is thermoformed into a curved shape of the cup by die molding.

(1) A non-elastic polyester crimped short fiber aggregate is used as a matrix, and is composed of a thermoplastic elastomer and an inelastic polyester having a melting point of at least 40 ° C. lower than the melting point of the polyester polymer constituting the short fiber, and the thermoplastic elastomer is at least The elastic composite fiber exposed to the fiber surface is dispersed and mixed,

(2) these elastic composite fibers have a heat-bonding point with each other in the crossed state,

(3) has a heat-sealing point formed by thermal fusion in the state where this elastic composite fiber and this inelastic polyester-based crimped short fiber intersect,

(4) The mixing ratio of this elastic composite fiber and this inelastic polyester crimped short fiber is 10: 90-50: 50, and

(5) Polyester elastomeric fiber structure having a fineness of 2 to 15 dtex of this inelastic polyester crimped short fiber

Is provided.

Best Mode for Carrying Out the Invention

Polyester-based elastic fiber structure used in the present invention,

(1) A non-elastic polyester crimped short fiber aggregate is used as a matrix, and is composed of a thermoplastic elastomer and an inelastic polyester having a melting point of at least 40 ° C. lower than the melting point of the polyester polymer constituting the short fiber, wherein the thermoplastic elastomer is at least a fiber The elastic composite fiber exposed to the surface is dispersed and mixed,

(2) these elastic composite fibers have a heat-bonding point with each other in the crossed state,

(3) has a heat-sealing point formed by thermal fusion in the state where this elastic composite fiber and this inelastic polyester-based crimped short fiber intersect,

(4) The mixing ratio of this elastic composite fiber and this inelastic polyester crimped short fiber is 10: 90-50: 50, and

(5) The fineness of this inelastic polyester crimped short fiber is 2-15 dtex.

In the present invention, thermoplastic elastomers are used for the components of the elastic composite fibers serving as heat-adhesive fibers in order to fix the intersection points of the matrix and the elastic composite fibers or the intersection points of the elastic composite fibers. By using the thermoplastic elastomer, a fiber structure made of 100% fiber is formed.

The elastic composite fibers are uniformly dispersed in the fiber structure and intersect with the matrix fibers and / or the elastic composite fibers to form an entanglement point. When the entanglement point is heated, the thermoplastic elastomer, which is a component of the elastic composite fiber, is covered as if the entanglement point is wrapped to fix the entanglement point. The entanglement sometimes forms an omni-directional flexible fixation point. Since these fixing points are formed of thermoplastic elastomers, they are very strong and rich in elasticity.

Moreover, in the thermoforming process for final molding of the cup material, the fiber structure is thermoformed into a predetermined shape, but the fixing point with this elasticity remains.

In addition, when the thickness of the fiber structure is squeezed to increase the density, the usual one made of inelastic thermally bonded fibers only becomes hard, but the elastic fiber structure of the present invention leaves a feeling of elasticity. Thus, the present invention makes it possible to form a cup consisting only of high elastic fibers.

An important characteristic of the cup made of fiber is the durability in water washing, dry cleaning, etc., and it is important that the dimensional change or shape change does not occur even after several decades of washing process.

As a result of various studies by the present inventors, in order to maintain so-called shape retention, the entanglement between the fibers is maintained from the inside to the outside of the fiber structure, and the outer surface and the lining are bonded by the adhesive component, and then into a cup shape. It has been found that integral molding is effective.

For example, when attempting to mold the laminated web of fibers only at once, by thermoforming, generally only the surface layer is strongly heat-bonded and the texture is remarkably hard, which is not suitable for the cup material, and the inner layer remains an unbonded structure, This is undesirable from the standpoint of long-term morphology.

In the fiber structure used in the present invention, first, an appropriate mechanical entanglement is added to increase the steric entanglement of the fibers in the fiber structure, while leaving the gap of the fiber structure as much as possible to form a mesh structure.

For this purpose, it is preferable to fuse the mechanically entangled fiber structure in advance with a heat treatment machine so that many three-dimensional entanglement points formed by the mechanical entanglement are fixed with the thermoplastic elastomer component to almost complete the mesh structure.

After that, the final molding is performed by thermoforming the fibrous structure. However, in the case where the mesh structure as the fibrous structure is already formed by fusing in advance at this time, the purpose of thermoforming is limited to providing only the shaping. For this reason, since the heating does not require more than necessary in final shaping | molding, it is not necessary to harden a surface unnecessaryly.

In the present invention, since the fiber structure is formed by the above-described process and composition, the texture is not only soft as a whole, but also the elastic repulsion force between the center portion and the outer peripheral portion of the fiber structure does not cause a large difference, and the form retainability of the fiber structure The structure of this stable cup becomes possible.

Thermoplastic elastomers play an important role as described above in order to form a firmness point between the fibers which stabilized the softness of the texture, the formation of the elasticity and the shape maintenance.

In the present invention, as the fibers of the inelastic polyester crimped short fiber aggregate constituting the matrix, ordinary polyethylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, polytetramethylene terephthalate, poly1,4 Suitable are dimethylcyclohexane terephthalate, polyfivalolactone, short fibers composed of these copolymer esters, or hybrids of these fibers, or composite fibers composed of two or more of the above polymer components. The cross-sectional shape of the short fibers may be any of circular, flat, mold release or hollow.

Although the crimped short fiber of the inelastic polyester crimped short fiber aggregate in this invention is not specifically limited, The short fiber which crimp is already present is preferable. The present crimped fiber can be obtained by mechanical crimping by crimper or the like during manufacture, spiral crimping by anisotropic cooling or the like, heating of side-by-side or eccentric sheath-core composite fibers. In addition, the use of latent crimped fibers which have a small amount of crimp but further crimped by subsequent heat treatment results in a lack of elasticity, and a dimensional change is so large that there is a drawback in moldability. Not.

As for the single yarn fineness of the fiber of the inelastic polyester crimped short fiber aggregate used by this invention, 2-15 dtex is preferable, More preferably, it is 2-13 dtex, More preferably, it is 3-7 dtex. When the fineness is smaller than 2 dtex, the structure becomes excessively dense and a moderate elasticity as a cup cannot be obtained. When the fineness is larger than 15 dtex, the texture becomes coarse, and a cup with a good texture cannot be obtained.

The elastic composite fibers used in the present invention are formed from thermoplastic elastomers and inelastic polyesters. As for the surface of an elastic composite fiber, it is preferable that a thermoplastic elastomer occupies at least 1/2 of surface area. As for a weight ratio, it is suitable that a thermoplastic elastomer and an inelastic polyester exist in the range of 30/70-70/30 by a composite ratio. Although it does not specifically limit as a form of an elastic composite fiber, It is preferable that a thermoplastic elastomer and an inelastic polyester are a side by side, a sheath core type, More preferably, it is a sheath core type. In this sheath-core elastic composite fiber, inelastic polyester becomes a core and a thermoplastic elastomer becomes a sheath, but this core may be concentric or eccentric. In particular, an elastic composite fiber having an eccentric shape is more preferable than one having a concentric shape because a coil-like elastic crimp is expressed.

Although it does not specifically limit as said thermoplastic elastomer, A polyurethane type elastomer or a polyester type elastomer is preferable.

The polyurethane-based elastomer is a low-melting polyol having a molecular weight of about 500 to 6000, such as dihydroxypolyether, dihydroxypolyester, dihydroxypolycarbonate, dihydroxypolyesteramide, and the like, and organic diisocyanate having a molecular weight of 500 or less. For example, p, p 'diphenylmethane diisocyanate, tolylene diisocyanate, isophorone diisocyanate, hydrogenated diphenylmethane diisocyanate, xylylene diisocyanate, 2,6 diisocyanate methyl caproate, hexamethylene diisocyanate, etc., molecular weight Polymers obtained by reaction with up to 500 chain extenders such as glycols, aminoalcohols or triols.

Particularly preferred among these polymers is polyurethane using polytetramethylene glycol or polycaprolactone or polybutylene adipate as polyol. In this case, as organic diisocyanate, p, p 'diphenylmethane diisocyanate is preferable. Moreover, as a chain extender, p, p 'bishydroxyethoxybenzene or 1,4 butanediol is preferable.

As the polyester elastomer, a polyether ester block copolymer formed by copolymerizing a thermoplastic polyester as a hard segment and a poly (alkylene oxide) glycol as a soft segment, more specifically terephthalic acid, isophthalic acid and phthalic acid , Aromatic dicarboxylic acids such as naphthalene 2,6 dicarboxylic acid, naphthalene 2,7 dicarboxylic acid, diphenyl 4,4 'dicarboxylic acid, diphenoxy ethane dicarboxylic acid, and sodium sulfoisophthalate Aliphatic dicarboxylic acids such as acids, alicyclic dicarboxylic acids such as 1,4 cyclohexanedicarboxylic acid, succinic acid, oxalic acid, adipic acid, sebacic acid, dodecanediic acid, dimer acid, or ester formation thereof At least one kind of dicarboxylic acid selected from an acid derivative and the like, 1,4 butanediol, butylene glycol, ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexame Aliphatic diols such as ethylene glycol, neopentyl glycol, decamethylene glycol, alicyclic diols such as 1,1 cyclohexanedimethanol, l, 4cyclohexanedimethanol, tricyclodecanedimethanol, or ester ester derivatives thereof At least one diol component selected from the group consisting of polyethylene glycol, poly (1,2 or 1,3 propylene oxide) glycol, poly (tetramethylene oxide) glycol, ethylene oxide and the like having an average molecular weight of about 400 to 5000 It is a ternary copolymer comprised from at least 1 sort (s) among poly (alkylene oxide) glycol, such as a copolymer with a propylene oxide and a copolymer with ethylene oxide and tetrahydrofuran.

In addition, the polyester-based elastomer is a block copolymer in which the hard segment is polybutylene terephthalate and the soft segment is polyoxybutylene glycol in consideration of the adhesiveness to the inelastic polyester crimped short fibers, and the like. Polyether polyesters are preferred.

In this case, as for the polyester part which comprises the hard segment of a polyester-type elastomer, polybutylene terephthalate whose main acid component is a terephthalic acid and a main diol component is a butylene glycol component is preferable. A part (usually 30 mol% or less) of this acid component may be substituted by the other dicarboxylic acid component or the oxycarboxylic acid component, and a part (usually 30 mol% or less) of the diol component is similarly butylene glycol It may be substituted by deoxy components other than a component. The polyether moiety constituting the soft segment of the polyester elastomer may be a polyether substituted with a dioxy component other than butylene glycol.

In the polymer, various stabilizers, ultraviolet absorbers, thickeners, gloss removers, colorants, and other various modifiers may also be blended as necessary.

The weight ratio of the elastic composite fiber in the polyester-based elastic fiber structure of the present invention is preferably 10 to 50%, more preferably 25 to 35%. If the weight ratio is less than 10%, a sufficient number of heat attachment points cannot be obtained, and the durability is insufficient. On the contrary, in the case of a weight ratio exceeding 50%, the number of hot-fixing points increases excessively, resulting in a rough and hard cup. Moreover, about the density of the elastic fiber structure (cup material) of this invention, it is preferable that the fiber density of the largest thickness part of a curved structure is 0.01-0.035 g / cm <3>.

In the present invention, the surface treatment agent mainly composed of polyether ester block copolymer on the surface of the constituent fibers of the polyester-based elastic fiber structure based on the total weight of the polyester-based elastic fiber structure 0.02 to 5.0% by weight It is preferable to attach.

Since the surface treatment agent mainly composed of the polyether ester block copolymer is attached to the surface of the constituent fibers of the polyester elastic fiber structure, adhesion between the constituent fibers in the polyester elastic fiber structure can be made stronger, Washing durability and shape retention of the cup can be further improved.

The surface treating agent mainly composed of polyether ester block copolymer is most preferably attached to the entire constituent fiber of the polyester-based elastic fiber structure. However, even if only the elastic composite fiber is attached, the adhesion between the constituent fibers can be improved. And the effect of the present invention can be sufficiently obtained without being attached.

As the surface treating agent mainly composed of polyether ester block copolymers, terephthalic acid, isophthalic acid, metasodium sulfoisophthalic acid, or lower alkyl esters, lower alkylene glycols, polyalkylene glycols, and polyalkylene glycols Polyether ester block copolymer composed of monoether, dispersed using alkali metal salt of polyoxyethylene alkylphenyl ether phosphate, alkali metal of polyoxyethylene alkylphenyl ether sulfate and / or surfactant such as ammonium salt or alkanolamine salt The one which was made.                 

The resin binder used in the present invention needs to be a hot melt type resin binder which is melt-bonded by heat in the form of powder or sheet, net or the like. In general, liquid resin binders are widely used at room temperature for lamination, but they have a poor handling and working environment in the manufacturing process, and because the adhesive penetrates into the inside of the fiber structure, the soft and elastic texture is damaged. Throw it away. In addition, the composition of the resin binder is polyester resin similarly to polyester elastic fiber structure, outer fabric, and lining.

The raw material used as the outer and lining of the cup of this invention will not be specifically limited if it is a raw material which consists of polyester fiber which has higher melting | fusing point than the hot melt type resin binder used for this invention. Moreover, it is preferable that the composition of the dough used as an outer material and lining consists only of polyester. In addition, although the dough of the outer fabric and the lining is preferable, a nonwoven fabric etc. may be sufficient.

Next, the manufacturing method for obtaining the breast cup of this invention is demonstrated. The elastic composite fibers containing the thermoplastic elastomer as one component and the inelastic polyester crimped short fibers are mixed at a predetermined ratio, laminated to a weight per required unit area in a cross layer through a conventional carding process, and then needle punched and And / or mechanical entanglement is applied to the sheet by a method such as water needling to obtain a nonwoven fabric sheet having a fiber structure density of 0.009 to 0.040 g / cm 3. Subsequently, the nonwoven fabric sheet is fused in advance by using a heat treatment machine at a temperature within the range of Em (thermoplastic elastomer) melting point or above [Tm (melting point of non-elastic polyester) -30] to fix the inter-fiber entanglement point and wind up with a winding machine. do.

Then, in order to adhere the outer fabric and the lining of polyester fiber manufacture to both surfaces of a nonwoven fabric sheet, a hot melt type resin binder is placed between a nonwoven fabric sheet, an outer fabric, and a lining. The binder sandwiched between the resin binders is heated to dissolve the binder, and the nonwoven fabric sheet is laminated to the outer fabric and the lining to obtain a composite fiber structure. In the composite fiber structure, the outer and linings made of polyester fibers are bonded to both sides of the nonwoven fabric sheet with a polyester adhesive.

Thereafter, the composite fiber structure is set in a cup-shaped mold for thermoforming, and the outer fabric, the lining and the fiber structure are thermoformed integrally to obtain a predetermined curved cup.

The cup of the present invention and its manufacturing method are not limited to the cup due to a change in a mold, for example, having a fiber structure inside, such as a pad such as a burst pad, a shoulder pad, a hip pad, and the surface of which is covered with a cloth. And the production method thereof.

Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited by these.

Example 1

Polybutylene terephthalate 38% (weight) obtained by polymerizing butylene glycol with an acid component obtained by mixing terephthalic acid and isophthalic acid at 80/20 (mol%), further polybutylene glycol (molecular weight 2000) 62% ( Weight) to heat and obtain a block copolymer polyether polyester elastomer.                 

The intrinsic viscosity (dissolved in orthochlorophenol and measured by a conventional method at 35 ° C) of the thermoplastic elastomer was 1.0, the melting point was 155 ° C, the elongation at break was 1500%, and the 300% elongation stress was 0.3 kg / Mm 2 and 300% elongation recovery was 75%.

The elastic composite fiber was spun by a conventional method so that this thermoplastic elastomer was made into the sheath, polybutylene terephthalate into the core, and 50/50 by the core / sheath weight ratio. This elastic composite fiber is an eccentric sheath-core composite fiber. This fiber was stretched about twice and cut into 64 mm, then heat-treated in hot water at 95 ° C., expressed with low shrinkage and crimp, and dried, followed by application of a surface treatment agent (oil agent). The obtained elastic composite fiber was 6.6 dtex.

Polyethylene terephthalate having 30% (weight) of this elastic composite fiber and a circular cross section of 6.6 dtex in thickness of a single fiber obtained by a conventional method, a fiber length of 51 mm, and a number of crimps of 12 / inch (4.7 / cm). 70% (weight) of short fibers (melting point of polyethylene terephthalate) were blended with a card to prepare a web, and then, using a needle punching machine manufactured by Ferrasa, the needle depth was 10 mm using a 36 times regular barb. 40 times / cm 2 needling was carried out, and dry heat treatment (pre-fusion) was carried out for 60 seconds under no pressure at 175 ° C., and a heat-bonding point was formed to obtain a weight of 35Og / m 2, a thickness of 20 mm, and a density of 0.0175 g per unit area. A fiber aggregate of / cm 3 was obtained.

In addition, a sheeting cloth made of polyester wool yarn using polyester and a tricot made of polyester are used as the outer fabric, respectively, and each is a polyester-based hot-bonded melt sheet (manufactured by Toyobo, Dynac Sheet G-4000 (trade name)) and The laminates were simultaneously laminated and laminated at 160 占 폚 to give a composite fiber structure in which the outer and linings were bonded.

Then, the composite fiber structure was put into a thermoforming cup mold, and thermoformed at 200 ° C. for 30 seconds to produce a curved breast cup material. Table 1 shows the physical properties of the obtained breast cup material.

In Table 1, the washing durability judged the visibility of the formability after repeating 20 cycles of continuous 20/50 cycle washing 100 times using a household washing machine.

Moreover, the repulsive force g in the center part (thickness maximum position) of a cup material read the stress (repulsive force, g) when 10 mm of iron bars were pressed on the product.

In addition, although the touch was also related to repulsion, the touch was judged to be soft and repulsive, and 0 was used for hard touch or repulsive elasticity.

Example 2, Comparative Examples 1-2

The single yarn fineness of the inelastic polyester short fibers was 13.0 dtex in Example 2, 0.6 dtex in Comparative Example 1, and 20.0 dtex in Comparative Example 2, except that the cup material was obtained. . Table 1 shows the physical properties of the obtained breast cup material.

Fineness of inelastic polyester (dtex) Structure density (g / cm 3) Central repulsive force (g) Texture                                                                                        Laundry durability Example 1  6.6 0.023 35 0 0 Example 2 13.0 0.022 40 0 0 Comparative Example 1  0.6 0.022 43 △ (hardness) 0 Comparative Example 2 20.0 0.022 22 △ (rough) △ (fluff)

In 6.6 dtex of Example 1 and 13.0 dtex of Example 2, the single yarn fineness of an inelastic polyester fiber obtained the cup material which was excellent in elasticity, was good in touch, and was excellent in shape maintainability.

In addition, the same treatment as in Example 1 was also attempted to produce a cup material containing no elastic composite fibers, but it is natural that it was obtained, but there was no fixation point, no elasticity, and no shape retention by washing. Not obtained.

Examples 3-5, Comparative Examples 3-4

Ring cross-section polyester crimped short fiber (single fineness 6.6 dtex, fiber length 51 mm, number of crimps 14 pieces / inch (5.5 piece / cm)) obtained by the conventional method, and elastic composite fiber (eccentric sheath Core type) Surface treatment agent which has a polyether ester block copolymer as a main component in each of 6.6 dtex and 51 mm length (sheath: melting | fusing point 155 degreeC, block copolymer polyether polyester elastomer, core: polybutylene terephthalate) To about 0.16% by weight relative to the total fiber weight, in Example 3, 10% of the elastic composite fiber blend in the polyester-based elastic fiber structure, 20% in Example 4, 50% in Example 5, Comparative Example 3 60% and 5% in Comparative Example 4 were mixed with a card to produce a web.

The web was needled at a needle density of 45 times / cm 2 by a 40 barb using a Ferrasa type needle punching machine at a needle depth of 7 mm, and heat-treated at 175 ° C. for 90 seconds on a mesh conveyor (pre-fusion welding). ) Was performed.

Next, a sheeting fabric made of polyester wool yarn using polyester and a tricot made of polyester are used as the outer fabric, respectively, and each is a polyester-based hot-bonded melt sheet (manufactured by Toyobo Co., Ltd., Dynac Sheet G-4000 (trade name)). It was laminated together and laminated at 160 ° C. to obtain a composite fiber structure in which the outer and linings were bonded.

This composite fiber structure was put into a thermoforming machine and subjected to heat treatment at 190 ° C. for 10 seconds to obtain a curved cup material.

The physical properties of the obtained breast cup material are shown in Table 2.

Elastic composite fiber mixing rate (%) Structure density (g / cm 3) Elasticity Texture Laundry durability Example 3 10 0.031 0 0 0 Example 4 20 0.029 0 0 0 Example 5 50 0.028 0 0 0 Comparative Example 3 60 0.030 0 △-× 0 Comparative Example 4  5 0.030 △ 0 △-×

The cup material prepared in the range of 10-50% of the mixing ratio of the elastic composite fiber is excellent in texture, elasticity and washing resistance, and in Comparative Example 3 having a mixing ratio of 60%, the texture becomes rough and hard, and in Comparative Example 4 having 5% It has been found to be not suitable for practical use because of problems in elasticity and laundry durability.

The cup made of the composite fiber structure of the present invention has a high elasticity and excellent breathability because the melt sheet of the polyester-based elastic fiber structure, the outer fabric and the lining, and the resin binder are integrally molded by the die molding process. It has excellent washing durability and shape maintenance.

In addition, by integrally molding the polyester-based elastic fiber structure, outer fabric and lining, and the molten sheet, peeling of the outer or lining and the polyester-based elastic fiber structure hardly occurs, the internal polyester-based elastic fiber structure Is supported as an outer or lining, so form collapse is less likely to occur.

In addition, since the cups made of the composite fiber structure of the present invention are all made of polyester, handling such as washing at the time of manufacture or after manufacture is easy, quick drying, low cost, and recycling are also possible.

Claims (4)

The polyester knitted fabric is composed of a composite fiber structure in which a polyester knit fabric is bonded to a polyester adhesive on both sides of a polyester elastic fiber structure having a structure represented by the following (1) to (5), and the polyester elastic fiber A surface treating agent composed mainly of a polyether ester block copolymer is attached to the surface of the constituent fibers of the structure based on 0.02 to 5.0% by weight based on the total weight of the polyester elastic fiber structure. Cup made of fiber structure: (1) A non-elastic polyester crimped short fiber aggregate is used as a matrix, and is composed of a thermoplastic elastomer and an inelastic polyester having a melting point of at least 40 ° C. lower than the melting point of the polyester polymer constituting the short fiber, and the thermoplastic elastomer is at least The elastic composite fiber exposed to the fiber surface is dispersed and mixed, (2) these elastic composite fibers have a heat-bonding point with each other in the crossed state, (3) has a heat-sealing point formed by thermal fusion in the state where this elastic composite fiber and this inelastic polyester-based crimped short fiber intersect, (4) The mixing ratio of this elastic composite fiber and this inelastic polyester crimped short fiber is 10: 90-50: 50, and (5) The polyester elastic fiber structure whose fineness of this inelastic polyester crimped short fiber is 2-15 dtex. delete The composite textile structure was laminated by laminating a polyester woven fabric on both surfaces of the sheet-shaped polyester elastic fiber structure having a structure represented by the following (1) to (5) using a polyester adhesive, which is a hot melt type resin binder. The composite fiber structure is thermoformed into a curved shape of a cup by die molding, and the method for producing a cup made of a composite fiber structure, wherein the surface of the constituent fibers of the polyester-based elastic fiber structure The manufacturing method of the cup which adheres 0.02 to 5.0 weight% of the surface treating agent which has a polyether ester block copolymer as a main component on the basis of the total weight of this polyester elastic fiber structure: (1) A non-elastic polyester crimped short fiber aggregate is used as a matrix, and is composed of a thermoplastic elastomer and an inelastic polyester having a melting point of at least 40 ° C. lower than the melting point of the polyester polymer constituting the short fiber, and the thermoplastic elastomer is at least The elastic composite fiber exposed to the fiber surface is dispersed and mixed, (2) these elastic composite fibers have a heat-bonding point with each other in the crossed state, (3) has a heat-sealing point formed by thermal fusion in the state where this elastic composite fiber and this inelastic polyester-based crimped short fiber intersect, (4) The mixing ratio of this elastic composite fiber and this inelastic polyester crimped short fiber is 10: 90-50: 50, and (5) The polyester elastic fiber structure whose fineness of this inelastic polyester crimped short fiber is 2-15 dtex. The fiber of claim 3, wherein the polyester-based elastic fiber structure blends the non-elastic polyester-based crimped short fibers and the elastic composite fibers into a blended web, and then mechanically entangles the blended web to form a fiber of 0.009 to 0.04 g / cm 3. At a temperature below the melting point (Em) of the thermoplastic elastomer constituting the elastic composite fiber and below the melting point (Tm) -30 ° C. of the polyester polymer constituting the inelastic polyester-based crimped short fiber. Method for producing a cup made of a composite fiber structure that is a polyester-based elastic fiber structure prepared by fusion in advance.