JP2013112911A - Heat insulation material for clothing and clothing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat insulation material for clothing with flexibility as well as heat insulation property, lightness and softness, and to provide a clothing comprising the heat insulation material for clothing.SOLUTION: A heat insulation material for clothing comprises: a non-elastic crimp short fiber consisting of two kinds of polyesters with a micro crimp developed by a potential crimp; and a thermally-fusible composite short fiber, on the surface of which a polymer with a melting temperature lower than that of a polymer composing the non-elastic crimp short fiber by 40°C or more is disposed as a thermally-fusible component. The non-elastic crimp short fiber and the thermally-fusible composite short fiber are mixed together in a weight ratio of 90:10 to 10:90 and thermally-fused to obtain a fiber structure in which thermally-fused points are distributed, the thermally-fused points including a thermally-fused point formed by thermally-fusing the thermally-fusible composite short fibers in an intersecting state and a thermally-fused point formed by thermally-fusing the thermally-fusible composite short fiber and the non-elastic crimp short fiber in an intersecting state. The fiber structure serves as a heat insulation material for clothing that is interposed between a surface layer and a liner.

Description

  The present invention is a garment heat insulating material used as a garment heat insulating material, and includes a garment heat insulating material that has not only heat retention, light weight, and softness but also stretchability, and the garment heat insulating material. Regarding clothing.

Conventionally, as a heat insulating material for clothing used between a surface layer and a back layer of clothing, a cotton structure, a fiber structure composed of inelastic crimped short fibers and heat-bondable composite short fibers, and the like have been proposed ( For example, see Patent Document 1 and Patent Document 2).
On the other hand, in recent years, there is a demand for clothing that is comfortable, light, warm and easy to move.
However, there has been a problem that conventional heat insulating materials for clothing are not sufficient in terms of stretchability.

JP 2007-125153 A Utility Model Registration No. 3148056

  The present invention has been made in view of the above-described background, and its object is to provide a heat insulating material for clothing that has not only heat retention, light weight, and softness but also stretchability, and a clothing using the heat insulating material for clothing. Is to provide.

  As a result of intensive investigations to achieve the above-mentioned problems, the inventors of the present invention, when configuring a heat insulating material for clothing using a non-elastic crimped short fiber and a thermal adhesive composite short fiber, as the non-elastic crimped short fiber, By using composite fibers with microcrimps that develop latent crimps, we have found that it is possible to obtain a heat insulating material for clothing that has not only heat retention, light weight, and softness but also stretchability, and further studies The present invention was completed by overlapping.

  Thus, according to the present invention, “a non-elastic crimped short fiber and a thermal adhesive property in which a polymer having a melting point lower by 40 ° C. or more than the polymer constituting the non-elastic crimped short fiber is arranged on the surface as a heat-fusion component. Adhesive points and / or the heat-adhesive composites blended with the composite short fibers in a weight ratio of 90/10 to 10/90 and heat-sealed in a state where the heat-adhesive composite short fibers intersect with each other A heat insulating material for clothing including a fiber structure in which short fibers and fixing points heat-sealed in a state where the non-elastic crimped short fibers intersect with each other, wherein the non-elastic crimped short fibers are unique There is provided a heat insulating material for clothing, which is a composite fiber composed of two types of polyesters having different viscosities and has a microcrimp in which latent crimp is developed.

In that case, it is preferable that the said micro crimp exists in the range of 30-60 pieces / 25mm. Moreover, it is preferable that the mechanical crimp of 7-15 pieces / 25mm is provided to the said inelastic crimped short fiber. Moreover, it is preferable that the single yarn fineness of the said inelastic crimped short fiber exists in the range of 1-15 dtex. Moreover, in the said fiber structure, it is preferable that a density exists in the range of 0.005-0.035 g / cm < ³ >. Moreover, in the said fiber structure, it is preferable that a fabric weight is in the range of 20-100 g / m < ² >. In the fiber structure, the elongation at break is preferably 30% or more. Moreover, in the said fiber structure, it is preferable that the recovery rate at the time of 10% expansion | extension is 80-100%.
Moreover, according to this invention, the clothing containing the said heat insulating material for clothing is provided. Such clothing is preferably outer clothing.

  ADVANTAGE OF THE INVENTION According to this invention, the clothing which uses the heat insulating material for clothing which has not only heat retention property, lightweight property, softness but also a stretching property, and this heat insulating material for clothing is obtained.

Hereinafter, embodiments of the present invention will be described in detail.
In the present invention, the inelastic crimped short fiber is a composite fiber composed of two kinds of polyesters having different intrinsic viscosities, and has a micro crimp formed of latent crimps. It is particularly important that the inelastic crimped short fibers have the microcrimps described above. Such micro crimps are manifested by heat treatment, and such micro crimps have a structure rich in elasticity like a spring. Further, since the fibers are intertwined in a complicated manner, the fiber structure has particularly excellent heat retention, light weight, softness, and stretchability.

  Here, the number of the microcrimps is preferably in the range of 30 to 60 pieces / 25 mm. If the number of micro crimps is less than 30/25 mm, sufficient stretchability may not be obtained. On the other hand, if the number of microcrimps is more than 60/25 mm, the heat shrinkage during molding of the fiber structure is large, so that problems such as wrinkles and dimensional fluctuations are likely to occur and molding may be difficult. There is.

  The inelastic crimped short fibers are preferably provided with 7 to 15 pieces / 25 mm of mechanical crimps. When the number of crimps is less than 7/25 mm, the entanglement between short fibers is insufficient, the card passing property is deteriorated, and a high-quality fiber structure may not be obtained. On the other hand, when the number of crimps exceeds 40 pieces / 25 mm, the entanglement of the short fibers is too large, and sufficient carding cannot be achieved with the card, and a high-quality fiber structure may not be obtained. is there. Preferred examples of the method for imparting such mechanical crimps include a method for imparting spiral crimps by anisotropic cooling and a method for imparting crimps by an ordinary indentation crimper method.

  The two kinds of polyesters that are different from each other in intrinsic viscosity forming the inelastic crimped short fibers are not particularly limited as long as the above-described microcrimp can be obtained. A range of .4 is preferred. If the difference in intrinsic viscosity is smaller than 0.1, microcrimps are not sufficiently developed, and the number of microcrimps may be smaller than the above range. Conversely, if the difference in intrinsic viscosity is greater than 0.4, the number of microcrimps may be greater than the above range.

  Preferred examples of the two kinds of polyesters having different intrinsic viscosities include polyethylene terephthalate polyester, polybutylene terephthalate polyester, polytrimethylene polyester, polylactic acid (PLA), and stereocomplex polylactic acid. Here, the polyethylene-based polyester is based on all repeating units of the polyester, and the ethylene terephthalate repeating unit is 90 mol% or more (preferably 95 mol% or more), and the polytrimethylene terephthalate-based polyester is all the repeating units of the polyester. Is a trimethylene terephthalate repeating unit of 90 mol% or more (preferably 95 mol% or more), and a polybutylene terephthalate-based polyester is a polybutylene terephthalate repeating unit of 90 mol% or more (based on all repeating units of polyester) Polyester preferably occupying 95 mol% or more).

  In order to select two kinds of polyesters having different intrinsic viscosities, those having different degrees of polymerization in the same kind of polyesters and those having different acid components and diol components in the different kinds of polyesters may be selected.

  If necessary, the polyester may be copolymerized with a terephthalic acid component or an ethylene glycol component with a third component in a range of 5 mol% or less. For example, isophthalic acid, 5-sodium sulfoisophthalic acid, Aromatics such as naphthalenedicarboxylic acid, orthophthalic acid, diphenyldicarboxylic acid, diphenyletherdicarboxylic acid, diphenylsulfonedicarboxylic acid, benzophenonedicarboxylic acid, phenylindanedicarboxylic acid, metal salt of 5-sulfoxyisophthalic acid, phosphonium salt of 5-sulfoxyisophthalic acid Alicyclic such as dicarboxylic acid, adipic acid, heptanedioic acid, octanedioic acid, azelaic acid, sebacic acid, undecanedioic acid, dodecanedioic acid, cycloaliphatic dicarboxylic acid, dichlorohexane dimethylenedicarboxylic acid, etc. Carboxyl, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, octamethylene glycol, decamethylene glycol, neopentylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, aliphatic glycols such as polytetramethylene glycol, Cycloaliphatic glycols such as cyclohexanediol and cyclohexanedimethanol, o-xylylene glycol, m-xylylene glycol, p-xylylene glycol, 1,4-bis (2-hydroxyethoxy) benzene, 1,4-bis ( 2-hydroxyethoxyethoxy) benzene, 4,4′-bis (2-hydroxyethoxy) biphenyl, 4,4′-bis (2-hydroxyethoxyethoxy) biphenyl , 2,2-bis [4- (2-hydroxyethoxy) phenyl] propane, 2,2-bis [4- (2-hydroxyethoxyethoxy) phenyl] propane, 1,3-bis (2-hydroxyethoxy) Benzene, 1,3-bis (2-hydroxyethoxyethoxy) benzene, 1,2-bis (2-hydroxyethoxy) benzene, 1,2-bis (2-hydroxyethoxyethoxy) benzene, 4,4′-bis ( Aromatic glycols such as 2-hydroxyethoxy) diphenylsulfone and 4,4′-bis (2-hydroxyethoxyethoxy) diphenylsulfone, hydroquinone, 2,2-bis (4-hydroxyphenyl) propane, resorcin, catechol, dihydroxynaphthalene , Dihydroxybiphenyl, dihydroxydiphenyl sulfone, etc. Diphenols and the like. These may be used alone or in combination of two or more. Further, in the polyester, a small amount of additives as necessary, for example, lubricants, pigments, dyes, antioxidants, solid phase polymerization accelerators, fluorescent brighteners, antistatic agents, antibacterial agents, ultraviolet absorbers, A light stabilizer, a heat stabilizer, a light-shielding agent, a matting agent, and the like may be contained. In particular, titanium oxide or the like is preferably added as a matting agent.

The inelastic crimped short fiber needs to be a composite fiber having a side-by-side composite form or an eccentric core-sheath composite form. Of these, the side-by-side composite form is particularly preferably used, and two kinds of polyesters having different intrinsic viscosities are appropriately selected and bonded to each other to have latent crimps. Is expressed and a micro crimp is obtained.
Here, the weight ratio of the two polyesters is 20:80 to 80:20 (more preferably 40:60 to 60:40).

The single yarn fineness of the inelastic crimped short fiber is preferably 1 to 15 dtex (more preferably 1 to 13 dtex, particularly preferably 3 to 7 dtex). If the single yarn fineness is less than 1 dtex, there is a possibility that a dense structure will be formed and a low-density fiber structure cannot be obtained. On the other hand, if the single yarn fineness is larger than 15 dtex, the texture becomes rough and there is a possibility that a fiber structure having a good feel cannot be obtained. Such inelastic crimped short fibers are preferably cut to a fiber length of 3 to 100 mm.
The single fiber cross-sectional shape of the inelastic crimped short fiber may be a normal round cross section, or may be an irregular cross section such as a triangle, square, flat or hollow.

  Next, it is important that the heat-sealing (heat-adhesive) component of the heat-adhesive composite short fiber has a melting point that is 40 ° C. or lower than the polymer component constituting the above-mentioned inelastic crimped short fiber. If the temperature is less than 40 ° C., the adhesion is insufficient, and there is a possibility that the fiber structure is hard to handle and has no waist. In addition, fine control of the heat treatment temperature is required, resulting in poor productivity.

  Here, as a polymer arranged as a heat-fusion component, polyurethane elastomer, polyester elastomer, inelastic polyester polymer and copolymer thereof, polyolefin polymer and copolymer thereof, polyvinyl alcohol polymer, etc. Examples of polyurethane elastomers include low melting point polyols having a molecular weight of about 500 to 6000, such as dihydroxy polyether, dihydroxy polyester, dihydroxy polycarbonate, dihydroxy polyester amide, and the like, and organic diisocyanates having a molecular weight of 500 or less, such as p, p'-diphenylmethane diisocyanate, tolylene diisocyanate, isophorone diisocyanate hydrogenated diphenylmethane isocyanate, xylylene isocyanate, 2 6-diisocyanate methyl caproate, hexamethylene diisocyanate, molecular weight of 500 or less chain extender, for example a polymer obtained by a reaction between glycol aminoalcohol or triol.

Of these polymers, polyester-based elastomers or polyurethane-based elastomers are particularly preferable.
The polyurethane-based elastomer is a polyurethane using polytetramethylene glycol, poly-ε-caprolactam, or polybutylene adipate as a polyol. In this case, examples of the organic diisocyanate include p, p′-bishydroxyethoxybenzene and 1,4-butanediol.

  As the polyester elastomer, a polyetherester copolymer obtained by copolymerizing thermoplastic polyester as a hard segment and poly (alkylene oxide) glycol as a soft segment, more specifically, terephthalic acid, isophthalic acid, phthalic acid, Alicyclic dicarboxylic acids such as naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4′-dicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, succinic acid, oxalic acid, adipine At least one dicarboxylic acid selected from an aliphatic dicarboxylic acid such as acid, sebacic acid, dodecanedioic acid and dimer acid, or ester-forming derivatives thereof, 1,4-butanediol, ethylene glycol trimethylene glycol, tetra Methylene glycol, pen Aliphatic diols such as methylene glycol, hexamethylene glycol neopentyl glycol, decamethylene glycol, or alicyclic diols such as 1,1-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, tricyclodecane methanol, or esters thereof Polyethylene glycol, poly (1,2- and 1,3-polypropylene oxide) glycol, poly (tetramethylene oxide) having at least one diol component selected from formable derivatives and the like, and an average molecular weight of about 400 to 5000 A ternary composed of at least one of poly (alkylene oxide) glycols such as glycols, copolymers of ethylene oxide and propylene oxide, copolymers of ethylene oxide and tetrahydrofuran, etc. Mention may be made of a polymer.

  In particular, from the viewpoint of adhesiveness, temperature characteristics, and strength, a block copolymer polyether ester having polybutylene terephthalate as a hard component and polyoxybutylene glycol as a soft segment is preferable. In this case, the polyester portion constituting the hard segment is polybutylene terephthalate in which the main acid component is terephthalic acid and the main diol component is a butylene glycol component. Of course, part of this acid component (usually 30 mol% or less) may be substituted with another dicarboxylic acid component or oxycarboxylic acid component, and part of the glycol component (usually 30 mol% or less) is also butylene. It may be substituted with a dioxy component other than the glycol component. Further, the polyether portion constituting the soft segment may be a polyether substituted with a dioxy component other than butylene glycol.

  Copolyester polymers include aliphatic dicarboxylic acids such as adipic acid and sebacic acid, aromatic dicarboxylic acids such as phthalic acid, isophthalic acid and naphthalenedicarboxylic acid and / or fats such as hexahydroterephthalic acid and hexahydroisophthalic acid. A co-polymer containing a predetermined number of cyclic dicarboxylic acids and aliphatic or alicyclic diols such as diethylene glycol, polyethylene glycol, propylene glycol, and paraxylene glycol, with addition of oxyacids such as parahydroxybenzoic acid as desired. Polymerized esters and the like can be mentioned. For example, polyesters obtained by adding and copolymerizing isophthalic acid and 1,6-hexanediol in terephthalic acid and ethylene glycol can be used.

Examples of the polyolefin polymer include low density polyethylene, high density polyethylene, polypropylene, and further modified products thereof.
In the above-mentioned polymer, various stabilizers, ultraviolet absorbers, thickening and branching agents, matting agents, colorants and various other improving agents may be blended as necessary.

  In the heat-bondable composite short fiber, the non-elastic polyester as described above is preferably exemplified as the counterpart component of the heat-sealing component. In that case, it is preferable that the heat fusion component occupies at least a half of the surface area. It is appropriate that the weight ratio of the heat fusion component and the counterpart component is in the range of 10/90 to 90/10 as a composite ratio. Although it does not specifically limit as a form of a heat bondable composite staple fiber, It is preferable that a heat-fusion component and the other party component are a side-by-side and a core-sheath type, More preferably, it is a core-sheath type. In this core-sheath type heat-adhesive composite short fiber, the heat fusion component is the sheath portion and the counterpart component is the core portion, but the core portion may be concentric or eccentric.

  In such a heat-adhesive conjugate short fiber, the single yarn fineness is preferably 1 to 15 dtex (more preferably 1 to 13 dtex, particularly preferably 3 to 7 dtex). If the single yarn fineness is less than 1 dtex, there is a possibility that a dense structure will be formed and a low-density fiber structure cannot be obtained. On the other hand, if the single yarn fineness is larger than 15 dtex, the texture becomes rough and there is a possibility that a fiber structure having a good feel cannot be obtained. Such a heat-adhesive composite short fiber is preferably cut into a fiber length of 3 to 100 mm.

  In the present invention, the non-elastic crimped short fibers and the heat-adhesive composite short fibers are mixed and heat-treated, whereby the heat-adhesive composite short fibers are heat-sealed in a crossed state and / or Alternatively, a fiber structure is formed in which the heat-bonding composite short fibers and the non-elastic crimped short fibers intersect with heat-bonded fixing points. Since the inelastic crimped short fiber has a micro crimp as described above, it is possible to obtain elasticity as if it were a spring.

  At this time, the weight ratio between the inelastic crimped short fibers and the heat-bonded composite short fibers needs to be 90/10 to 10/90. When the ratio of the heat-bonding composite short fibers is less than this range, the fixing points are extremely small, and there is a possibility that sufficient stretchability cannot be obtained. On the contrary, when the ratio of the heat-bonding composite short fibers is larger than this range, the fixing points are excessively increased and the fiber structure may be hardened.

  Further, in the fiber structure included in the heat insulating material of the present invention, as shown in FIG. 1 of the registered utility model No. 314856, the heat-adhesive composite short fiber and the inelastic crimped short fiber are made of a fiber structure. They may be arranged in the thickness direction. Here, “arranged in the thickness direction” means that the total number of fibers arranged in parallel to the thickness direction of the fiber structure is (T) and the thickness direction of the fiber structure is On the other hand, when the total number of fibers arranged vertically is (W), T / W is 1.5 or more. Moreover, when using the heat insulating material of this invention, it is preferable that the direction of a fiber is the thickness direction of clothing.

There is no limitation in particular in the method of manufacturing the said fiber structure. For example, the inelastic crimped short fibers and the heat-bonded composite short fibers are mixed at a predetermined ratio, and are laminated in a required basis weight by a cross layer through a normal card process to obtain a sheet-like web. At that time, mechanical entanglement may be added to the sheet by a method such as needle punching and / or water needling as necessary to avoid delamination of the structure. The fiber density of such a web is preferably in the range of 0.003 to 0.03 g / cm ³ . Subsequently, the temperature of the heat-bonding component of the heat-bonding composite short fiber is equal to or higher than the melting point of the heat-bonding composite short fiber (preferably the temperature of the heat-bonding component is equal to or higher than the melting point of any one of the two types of polyesters The nonwoven fabric sheet is fused at a temperature lower than the melting point by 30 ° C. or more to develop microcrimps of the heat-bonded composite short fibers, and at the same time, the entanglement points between the fibers are thermally fixed to obtain a fiber structure, Wind up with a take-up machine. Such a micro crimp provides a spring-like structure rich in elasticity and elasticity. At the same time, since the fibers are intertwined in a complicated manner, the number of heat fixing points is increased as compared with a conventional fiber structure using a matrix without a micro crimp. With such a heat fixing point, excellent softness, stretchability, and extension recovery rate can be obtained.

  Further, when arranging the heat-bondable composite short fibers and the inelastic crimped short fibers in the thickness direction of the fiber structure, for example, blending the non-elastic crimped short fibers and the heat-adhesive composite short fibers, After spinning as a uniform web with a roller card, heat treatment is carried out while folding the web into an accordion shape using a heat treatment machine as shown in FIG. 1 of JP-A-2007-025044. The method of forming is preferably exemplified. For example, a device disclosed in Japanese Translation of PCT International Publication No. 2002-516932 (for example, commercially available Strut equipment manufactured by Struto Corporation) may be used.

In the fiber structure thus obtained, the density is preferably in the range of 0.005 to 0.035 g / cm ^{3 (} more preferably 0.005 to 0.02 g / cm ³ ). If the density is smaller than this range, a sufficient elongation recovery rate may not be obtained. On the contrary, if the density is larger than this range, the fiber structure becomes heavy and the lightness may be impaired.

Moreover, it is preferable that the fabric weight of the said fiber structure exists in the range of 20-100 g / m < ² >. If the basis weight is smaller than this range, the heat retention may be impaired. On the contrary, if the basis weight is larger than this range, the fiber structure becomes heavy and the lightness may be impaired.
Moreover, in the said fiber structure, although there is no restriction | limiting as the thickness, It is preferable that it is 3-15 mm. If the thickness is less than 3 mm, the heat retaining property of the heat insulating material may be impaired. Conversely, if the thickness is greater than 15 mm, the stretchability may be impaired.

  In such a fiber structure, the inelastic crimped short fibers used as a matrix as described above have a micro crimp in which latent crimps are expressed by heat treatment, and thus have a structure like a spring. It becomes like this. Further, since the fibers are intertwined in a complicated manner, the number of heat fixing points is increased as compared with a conventional fiber structure using a matrix fiber having no micro crimp. As a result, such a fiber structure has not only heat retention, light weight and softness but also stretchability.

Here, in the fiber structure, the elongation at break is preferably 30% or more (more preferably 30 to 100%). Moreover, in the said fiber structure, it is preferable that the recovery rate at the time of 10% expansion | extension is 80-100%. When the fiber structure has such characteristics, it is possible to provide clothing that is easy to move and does not lose its shape.
Such a fiber structure may be provided with known functional processing such as water repellent processing, flameproof processing, flame retardant processing, negative ion generation processing, and metal deposition.

The heat insulating material for clothing of the present invention may be composed of the above-mentioned fiber structure alone, or may have a structure in which the fiber structures are overlapped. Furthermore, on one side or both sides, resin backing processing, and furthermore, various thin nonwoven sheets (for example, 10 to 20 g / m ² polyester nonwoven fabric), woven / knitted fabric, urethane foam, various films, etc. are appropriately provided with an adhesive layer. It is also preferable to stick together to make a heat insulating material. Further, there is no problem in bonding a film made of a metal such as aluminum or a polymer such as special polyester for heat reflection.
Since the heat insulating material for clothing thus obtained uses the above-described fiber structure, it has not only heat retention, light weight and softness but also stretchability.

Next, the clothing of this invention is clothing containing the said heat insulating material for clothing. Since this garment is a garment including the garment heat insulating material, it has not only heat retention, light weight and softness but also stretchability.
Here, such clothing includes sports clothing, men's clothing, women's clothing, children's clothing, jackets, gloves, hats, trousers, down clothing, winter clothing, and the like. Outer clothing is particularly preferable. Such outer garments include sports garments and winter clothes. When clothing is obtained using the above-mentioned heat insulating material for clothing, it has not only heat retention, light weight, and softness but also stretchability, and it is easy to move and is not easily deformed.

Further, when the heat insulating material for clothing is used between the surface layer and the back layer of the clothing, the stretch rate in the warp direction or the weft direction of the fabric is 5% or more (more preferably 30%). ~ 100%) extensible fabric is preferred.
In that case, such an extensible fabric is a covering yarn, a polytrimethylene terephthalate yarn, a temporary yarn covering polyester fiber to an elastic fiber, as described in JP-A-8-170254 and utility model registration publication No. 2579024. Examples thereof include a fabric using an extensible yarn such as a twisted crimped yarn and a crimped fiber expressing a latent crimp of a side-by-side type composite fiber, and a fabric having a knitted structure.
In this case, examples of the elastic fiber include polyurethane elastic fiber, polyetherester elastic fiber, polyamide elastic fiber, and the like.

  On the other hand, the polyester fiber is preferably a polyester fiber made of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, polyester obtained by copolymerizing a third component, or the like. The polyester may be material-recycled or chemical-recycled polyester or polyethylene terephthalate using a monomer component obtained from biomass, that is, a biological material. Furthermore, the polyester obtained using the catalyst containing the specific phosphorus compound and titanium compound which are described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient.

  In the polymer forming the polyester fiber, a matting agent, an antibacterial agent, a micropore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, as necessary, within the range not impairing the object of the present invention. , A fluorescent brightener, a coloring agent, a hygroscopic agent, or one or more inorganic fine particles may be contained. For example, it is preferable to add a matting agent to the polymer contained in the polymer to form a semi-dal polyester or a full-dal polyester, because the fabric can be provided with permeation resistance and infrared / ultraviolet shielding properties. Moreover, as an antibacterial agent, not only a natural type antibacterial agent and an inorganic type antibacterial agent, but also an ester-forming sulfonic acid metal salt compound or an ester-forming phosphonium sulfonate as described in International Publication No. 2011/048888 pamphlet. A polyester obtained by copolymerizing a salt compound and subjected to an acid treatment may be used.

  The form of the polyester fiber may be a short fiber or a long fiber (multifilament), but a long fiber (multifilament) is preferable for obtaining a soft texture. In particular, it is preferable that the fiber has a single yarn fineness of 1.5 dtex or less (more preferably 0.0001 to 1.2 dtex, particularly preferably 0.001 to 0.9 dtex) because a soft texture can be obtained. In particular, a multifilament having 30 or more filaments (more preferably 70 to 200) and a total fineness of 30 to 200 dtex (more preferably 30 to 150 dtex) is preferable because a further excellent soft texture can be obtained. Superfine fibers called nanofibers having a single yarn fiber diameter of 1 μm or less may be used.

The single fiber cross-sectional shape of the polyester fiber is not particularly limited, and may be not only a circle but also a triangular shape, a flat shape, a flat shape with a constriction as described in International Publication No. 2008/001920, a hollow shape having a different shape such as a hollow shape, etc. .
Further, as the knitted fabric, as the weft knitting structure, flat knitting, rubber knitting, double-sided knitting, pearl knitting, tuck knitting, floating knitting, one-sided knitting, lace knitting, bristle knitting and the like are exemplified, and the warp knitting structure Examples include single denby knitting, single atlas knitting, double cord knitting, half knitting, half base knitting, satin knitting, half tricot knitting, back hair knitting, jacquard knitting, and the like. The number of layers may be a single layer or a multilayer of two or more layers. Such a knitted fabric can be manufactured by a conventional method.

  In addition, for the fabric constituting the surface layer or the back layer of clothing, conventional dyeing processing, raising processing, water repellent processing, UV shielding or antistatic agent, antibacterial agent, deodorant, insect repellent, phosphorescent agent Further, various processings for imparting functions such as a retroreflective agent and a negative ion generator, buffing processing, or brush processing may be additionally applied.

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.
(1) Melting point Using a differential thermal analyzer 990 manufactured by Du Pont, measured at a temperature increase of 20 ° C./min, and obtained a melting peak. If the melting temperature is not clearly observed, the melting point is the temperature at which the polymer softens and starts to flow (softening point) using a trace melting point measuring device (manufactured by Yanagimoto Seisakusho). In addition, the average value was calculated | required by n number 5.
(2) Microcrimp, number of crimps Measured by the method described in JIS L 1015 7.12. In addition, the average value was calculated | required by n number 5.
(3) Weight per unit area, density, thickness Measured according to JIS L 1913.
(4) Elongation at break (elongation)
It was measured according to JIS L 1913.
(5) Recovery rate at 10% extension The fifth repetition was measured by the JIS L 1096D method.
(6) Intrinsic viscosity Measured at 35 ° C. using orthochlorophenol as a solvent. In addition, the average value was calculated | required by n number 5.

[Example 1]
Polybutylene terephthalate 38% (by weight) obtained by polymerizing an acid component obtained by mixing terephthalic acid and isophthalic acid at 80/20 (mol%) and butylene glycol, and further polybutylene terephthalate (molecular weight 2000) A thermoplastic block copolymer polyether ester elastomer was obtained by heating and reaction with 62% (weight). The thermoplastic elastomer has an intrinsic viscosity of 1.0, a melting point of 155 ° C., a breaking elongation at the film of 1500%, a 300% elongation stress of 2.94 Pa (0.3 kg / mm ² ), and a 300% elongation recovery rate of 75%. The elastic composite fiber yarn was spun by a conventional method so that the thermoplastic elastomer was used as a sheath, polybutylene terephthalate was used as a core, and the core / sheath weight ratio was 50/50. This elastic conjugate fiber yarn is an eccentric core-sheath type conjugate fiber. This elastic composite fiber yarn was stretched approximately twice, and after applying a surface treatment agent (oil agent), it was cut to 64 mm to obtain a heat-adhesive composite short fiber having a single yarn fineness of 6.6 dtex.

  On the other hand, polyethylene terephthalate having an intrinsic viscosity of 0.65 (melting point: 256 ° C.) is used as the high-viscosity side polyester, and polyethylene terephthalate (melting point: 256 ° C.) having an intrinsic viscosity of 0.45 is used as the low-viscosity side polyester. 20) The side-by-side type composite fiber yarn was spun by a conventional method so that the weight ratio was 50/50. This side-by-side type composite fiber yarn is stretched approximately twice to give a surface treatment agent (oil agent), then, using a normal crimper device, 10 pieces / 25 mm of mechanical crimps are applied, and further cut to 51 mm as a matrix. An inelastic crimped short fiber having a latent crimping performance with a single yarn fineness of 5.0 dtex was obtained.

Next, 30% (weight) of the heat-adhesive composite short fibers and 70% (weight) of the inelastic crimped short fibers were mixed with a card to prepare a web, and dried at 175 ° C. in a non-pressurized state for 60 seconds. Heat treatment (pre-fusion) is performed to develop latent crimps of the composite short fiber A to form 48 crimps / 25 mm microcrimps and heat fixing points, with a basis weight of 60 g / m ² and a thickness of 5.3 mm A fiber structure having a density of 0.014 g / cm ³ was obtained. In the fiber structure, the elongation at break was 60%, and the recovery rate at 10% elongation was 89%.
Next, a heat insulating material for clothing was constituted by the fiber structure alone, and was placed between the surface layer (extensible fabric) and the back layer (extensible fabric) of the clothing to obtain sports clothing and cold clothing. In addition to lightness and softness, it also has stretchability, and is easy to move and difficult to lose its shape.

[Comparative Example 1]
In Example 1, a fabric having the same basis weight and density as in Example 1 was prepared by using hollow cotton 6.6 dtex made of polyethylene terephthalate instead of inelastic crimped short fibers, and the elongation at break and the recovery rate at the time of elongation were as follows. As a result, the elongation at break was 30%, and the recovery rate at 10% elongation was 70%, which was inferior to that obtained in Example 1 in terms of stretchability.

  According to the present invention, it is possible to obtain a heat insulating material for clothing that has not only heat retention, light weight, and softness but also stretchability, and a clothing using the heat insulating material for clothing, and its industrial value is extremely large. is there.

Claims (10)

The weight ratio of the inelastic crimped short fiber and the heat-adhesive composite short fiber disposed on the surface of the polymer having a melting point lower by 40 ° C. or lower than the polymer constituting the inelastic crimped short fiber as a heat-fusible component Adhering point that is blended so as to be 90/10 to 10/90 and heat-sealed in a state where the heat-adhesive composite short fibers cross each other and / or the heat-adhesive composite short fibers and the inelastic crimped short A heat insulating material for clothing including a fiber structure formed by interspersed with fixing points thermally fused in a state where fibers intersect with each other,
A heat insulating material for clothing, wherein the inelastic crimped short fiber is a composite fiber composed of two kinds of polyesters having different intrinsic viscosities, and has a micro crimp formed of latent crimps.   The heat insulating material for clothes according to claim 1, wherein the number of the micro crimps is in a range of 30 to 60 pieces / 25 mm.   The heat insulating material for clothes according to claim 1 or 2, wherein mechanical crimps of 7 to 15 pieces / 25 mm are imparted to the inelastic crimped short fibers.   The heat insulating material for clothing according to any one of claims 1 to 3, wherein a single yarn fineness of the inelastic crimped short fibers is in a range of 1 to 15 dtex. The heat insulating material for clothing according to any one of claims 1 to 4, wherein the fiber structure has a density in a range of 0.005 to 0.035 g / cm ³ . The heat insulating material for clothing according to any one of claims 1 to 5, wherein the basis weight is in the range of ²⁰ to 100 g / m ^{2 in} the fiber structure.   The heat insulating material for clothing according to any one of claims 1 to 6, wherein the fiber structure has an elongation at break of 30% or more.   The heat insulating material for clothing according to any one of claims 1 to 7, wherein the fiber structure has a recovery rate of 80 to 100% at 10% elongation.   The clothing containing the heat insulating material for clothing in any one of Claims 1-8.   The garment according to claim 9, wherein the garment is an outer garment.