stuffing and clothing

Abstract

To provide a wadding and a clothing excellent in bulkiness and heat retaining properties, and preferably excellent in process passing properties.SOLUTION: A wadding including 5 to 70 wt.% of a staple fiber A having a single fiber fineness of 0.05 to 1 dtex and 30 to 95 wt.% of a hollow staple fiber B having a single fiber fineness of 0.5 to 2.2 dtex is produced. A clothing is then produced from the wadding on an as-needed basis.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This invention relates to stuffing cotton containing short fibers, which is excellent in bulkiness and heat retention, and preferably also in process passability, as well as to clothing. [Background technology]

[0002] Feathers, known for their excellent heat retention and lightness, are widely used as stuffing (also called "padding") for winter clothing, pillows, comforters, and other bedding. These feathers are generally collected from waterfowl and are classified into down (collected from the breast) and feathers (from the wing). A mixture of these is used as stuffing for down jackets, down comforters, and other similar items. Feathers are known for their loftiness, which creates a thick insulating layer and provides excellent heat retention.

[0003] However, obtaining feathers for use as stuffing requires a large quantity of waterfowl, and the supply is subject to fluctuations due to natural conditions and conservation efforts. Furthermore, people with allergies to animal hair may not be able to use feather products, and feathers are not suitable for material recycling, such as being melted down and recycled as a raw material like synthetic fibers.

[0004] For this reason, stuffing materials using short fibers made of synthetic fibers have been proposed (for example, Patent Documents 1-2). However, conventional stuffing materials have not yet been sufficient in terms of bulkiness and heat retention. Generally, short fibers are often opened using a carding machine, but when fine-denier short fibers are opened using a carding machine, neps and other imperfections are generated, resulting in poor process passability. There is also a method of obtaining stuffing materials by cutting sea island fibers after meshing them in a tube and then reducing the weight with alkali, but this method has problems such as a large environmental burden due to the loss of weight-reducing components, a long process to obtain stuffing materials, and poor productivity (Patent Document 3). [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2018-193646 [Patent Document 2] Japanese Patent Publication No. 2020-172726 [Patent Document 3] Japanese Patent Publication No. 2016-101361 [Overview of the project] [Problems that the invention aims to solve]

[0006] This invention has been made in view of the above background, and its purpose is to provide stuffing and clothing that are excellent in bulkiness and heat retention, and preferably also excellent in processability. [Means for solving the problem]

[0007] As a result of diligent research, the inventors have invented stuffing and clothing that can achieve the aforementioned objectives. This invention encompasses the following inventions. 1. A filling cotton characterized by containing 5 to 70% by weight of short fibers A with a single fiber fineness of 0.05 to 1 dtex and 30 to 95% by weight of hollow short fibers B with a single fiber fineness of 0.5 to 2.2 dtex. 2. The stuffing cotton according to item 1, wherein the short fibers A are crimped in a zigzag pattern with a crimp count of 16 to 30 per 2.54 cm. 3. The stuffing cotton according to 1 or 2 above, wherein the hollowness ratio of the hollow short fibers B is 35% or more. 4. The stuffing cotton according to any one of 1 to 3 above, wherein the hollow short fibers B have three-dimensional crimp. 5. The stuffing cotton according to any one of 1 to 4 above, further comprising short fibers made of core-sheath type composite fibers with a single fiber fineness of 0.5 to 8 dtex, wherein at least one of the core portion and the sheath portion contains a short fiber C containing an infrared absorbent. 6. The stuffing cotton according to any one of items 1 to 5 above, wherein the stuffing cotton is in the form of a sheet or granules. 7. The stuffing cotton according to any one of items 1 to 6 above, wherein all of the fibers constituting the stuffing cotton are polyethylene terephthalate fibers. 8. A garment in which the stuffing cotton described in any of items 1 to 7 above is enclosed between the outer fabric and the inner fabric. 9. The air permeability of the outer fabric and inner fabric is 0.05 to 5.00 cm. 3 / cm 2 The clothing described in item 8 above, which is within the range of / s. 10. The garment according to 8 or 9 above, wherein the stuffing is enclosed in such a way that the void ratio of the stuffing is 97% or more and the thickness is 5 mm or more. [Effects of the Invention]

[0008] According to the present invention, stuffing cotton and clothing can be obtained that are excellent in bulkiness and heat retention, as well as in process passability. [Modes for carrying out the invention]

[0009] The embodiments for carrying out the present invention will be described in detail below. The stuffing cotton of the present invention is a mixed stuffing cotton containing 5 to 70% by weight of short fibers A with a single fiber fineness of 0.05 to 1 dtex and 30 to 95% by weight of hollow short fibers B with a single fiber fineness of 0.5 to 2.2 dtex. In this case, it is preferable that the hollowness ratio of the hollow short fibers B is 35% or more (more preferably 35 to 60%).

[0010] Here, if the single fiber fineness of the short fibers A is less than 0.05 dtex, production by conventional spinning is difficult. If fibers less than 0.05 dtex are produced as sea-island yarn, cut after spinning, subjected to alkali weight reduction to obtain shortcut fibers, they contain a large amount of moisture, which makes them unsuitable for both card opening and air opening, and thus not preferable. From the viewpoint of heat retention, a larger number of dense air layers (dead air) with blocked air flow is more advantageous. Short fibers B are hollow, but if the fineness of short fibers B is smaller than 0.5 dtex, short fibers A are also fine fibers with a fineness of 1 dtex or less, which is not preferable from the viewpoint of process passability in card opening due to the occurrence of wrapping around cylinders, fly and neps. Regarding the blending of short fibers A and short fibers B, when card opening is performed with a weight ratio of short fibers A exceeding 70%, the proportion of fine fibers in the blend becomes high, which increases the risk of wrapping around cylinders, generation of fly and neps, and is thus not preferable. When the weight ratio of short fibers A is less than 5%, the number of dense air layers decreases, which is not preferable from the viewpoint of heat retention. Similarly, when the weight blending ratio of short fibers B is less than 30%, card opening results in a high proportion of fine fibers in the blend, which increases the risk of wrapping around cylinders, generation of fly and neps, and is thus not preferable. When the weight blending ratio of short fibers B exceeds 95%, the content of fine short fibers A is low, which is not preferable from the viewpoint of heat retention.

[0011] Further, it is preferable that the number of crimps of the short fibers A is 16 to 30 crimps per 2.54 cm. If the number of crimps is less than 16 crimps per 2.54 cm, fly is likely to be generated, which may reduce the passability in the carding process. Conversely, if the number of crimps exceeds 30 crimps per 2.54 cm, the carding passability may be reduced from the viewpoint of wrapping around the cylinder and generation of neps (fiber lumps). It is preferable that zigzag crimps (planar zigzag crimps) are imparted as such crimps.

[0012] On the other hand, it is preferable that the hollow short fibers B have three-dimensional crimps. If the fibers have planar zigzag (mechanical) crimps, the crimps are imparted by applying mechanical damage to the fibers themselves, which may reduce bulk recovery.

[0013] In the wadding of the present invention, it is further preferable from the viewpoint of heat retention that it also includes short fibers C which are short fibers made of core-sheath composite fibers having a single fiber fineness of 0.5 to 8 dtex, wherein an infrared absorber is contained in at least one of the core portion and the sheath portion of the core-sheath composite fiber. In this case, the weight ratio of the infrared absorbing material is preferably 3 to 30% by weight relative to the weight of the core portion or the sheath portion. If the weight ratio of the infrared absorbing material is less than 3% by weight, it may be difficult to obtain a sufficient heat retaining effect; if it exceeds 30% by weight, problems such as scum generation during spinning and guide wear on the thread path may occur.

[0014] Further, the weight ratio of the short fibers C is preferably 5 to 95% by weight. In this case, it is preferable that the total weight of the short fibers A, the hollow short fibers B and the short fibers C is 100% by weight. If the single fiber fineness of the short fibers C is less than 0.5 dtex, process passability may be reduced; if it exceeds 8 dtex, heat retention may be reduced.

[0015] The aforementioned infrared absorbing material preferably contains 3 to 30% by weight of ceramic oxides having far-infrared radiation. Examples of oxide ceramics include alumina (Al2O3), magnesia (MgO), zirconia (ZrO2), titania (TiO2), as well as silicon dioxide (SiO2), chromium oxide (Cr2O2), ferrite (FeO2·Fe3O4), spinel (MgO·Al12O3), ceria (CeO2), and beryllia (BeO). Among these ceramics, it is preferable that the far-infrared emissivity at 30°C is 65% or more in the 4.5 to 30 μm range, and particularly desirable that it be 75% or more. Furthermore, it is preferable to use the oxide ceramics after fine grinding to a particle size of 5 μm or less, preferably 1 μm or less. As for the method of incorporating oxide ceramics into the fiber-forming polymer, the polymer Any method may be employed, such as adding it during the polymerization process of the polymer or kneading it with the base chip in the spinning process as a master chip. However, it is preferable to use a twin-screw spinner to mix and melt spin the master chip and base chip, as this ensures a uniform dispersion of oxide ceramics and improves spinnability. The polymers used for the sheath component and core component in the composite fiber production of the present invention are not particularly limited, but thermoplastic polymers such as polyethylene, polyolefins such as polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyamides such as nylon-6 and nylon-6,6 are preferably used.

[0016] The ceramic oxide content in the core and / or sheath is preferably 3 to 30% by weight, more preferably 5 to 15% by weight. If the content is less than 3% by weight, the far-infrared radiation performance may be insufficient, and satisfactory performance may not be obtained. On the other hand, if it exceeds 30% by weight, not only will the spinnability of the composite fiber decrease, making it difficult to form fibers, but the fiber properties may also be inferior.

[0017] Furthermore, it is preferable to apply a smoothing agent mainly composed of silicone components to the surface of the composite fiber containing oxide ceramics in an amount of 0.2 to 5% by weight (relative to the fiber weight). If the silicone component is less than 0.2% by weight, there is a risk of wear and deterioration of equipment such as cards due to ceramic oxides. If the silicone component exceeds 5% by weight, the fiber entanglement in the carding process will decrease, and there is a risk that a card web cannot be obtained.

[0018] In the present invention, it is preferable that all short fibers constituting the stuffing are polyester fibers. Examples of such polyesters include polyalkylene terephthalates such as polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate (polytetramethylene terephthalate), or polyalkylene naphthalates such as polyethylene naphthalate, polytrimethylene naphthalate, and polybutylene naphthalate (polytetramethylene naphthalate), which are polyesters of aromatic dicarboxylic acids and aliphatic diols. Other examples include polyesters obtained from alicyclic dicarboxylic acids and aliphatic diols such as polyalkylene cyclohexane dicarboxylate, polyesters obtained from aromatic dicarboxylic acids and alicyclic diols such as polycyclohexanedimethylene terephthalate, polyesters obtained from aliphatic dicarboxylic acids and aliphatic diols such as polyethylene succinate, polybutylene succinate, or polyethylene adipate, or polyesters obtained from polyhydroxycarboxylic acids such as polylactic acid and polyhydroxybenzoic acid. Alternatively, copolymers and blends of these polyester components in any proportion are also exemplified. Furthermore, depending on the purpose, one or more components such as isophthalic acid, phthalic acid, alkali metal salts of 5-sulfoisophthalic acid, quaternary ammonium salts of 5-sulfoisophthalic acid, quaternary phosphonium salts of 5-sulfoisophthalic acid, succinic acid, adipic acid, suberic acid, sebacic acid, cyclohexanedicarboxylic acid, α,β-(4-carboxyphenoxy)ethane, 4,4-dicarboxyphenyl, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, or 1,4-cyclohexanedicarboxylic acid, or diester compounds consisting of organic groups having 1 to 10 carbon atoms, may be copolymerized as the dicarboxylic acid component.

[0019] Furthermore, depending on the purpose, one or more components of diethylene glycol, 1,2-propanediol, 1,2-butanediol, 1,3-butanediol, 1,6-hexanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, 2,2-bis(p-β-hydroxyethylphenyl)propane, polyethylene glycol, poly(1,2-propylene) glycol, poly(trimethylene) glycol, or poly(tetramethylene) glycol may be copolymerized as the diol component. In addition, one or more components of hydroxycarboxylic acids such as ω-hydroxyalkyl carboxylic acids, pentaerythritol, trimethylolpropane, trimellitic acid, or trimesic acid, or compounds having three or more carboxylic acid components or hydroxyl groups, may be copolymerized to create branching. Mixtures of polyesters with different compositions as exemplified above are also included. Material recycled and chemically recycled polyesters, polyesters containing plant-derived components, and aliphatic polyesters are also included.

[0020] In particular, it is preferable that all the fibers constituting the stuffing are polyethylene terephthalate fibers. The thermoplastic resin constituting the short fibers may optionally contain one or more of the following: a pore-forming agent, a cationic dyeing agent, a color-inhibiting agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a colorant, a hygroscopic agent, or inorganic fine particles.

[0021] In the polyester fiber described above, it is preferable that the intrinsic viscosity is 0.35 to 0.50 dL / g. If the intrinsic viscosity is less than 0.35 dL / g, uneven distribution of the resin occurs due to the low melt viscosity during molding, making molding difficult, which is undesirable. On the other hand, if the intrinsic viscosity exceeds 0.50 dL / g, the magnification during stretching may not be sufficient, and the texture of the stuffing may become hard due to the modulus of the fiber.

[0022] In the cotton filling of the present invention, each short fiber preferably contains 10 to 5000 ppm of silicon. Such silicon may be kneaded into the resin constituting the fiber, but it is more preferable that it is attached to the surface of the single fiber as a component of the oil. The silicon content is further preferably 20 to 4000 ppm, and particularly preferably in the range of 30 to 3000 ppm. If the silicon content is less than 10 ppm, there is a risk of increased defects due to fiber splitting and single-fiber breakage, and a decrease in the processability of the cotton filling. On the other hand, if the silicon content exceeds 5000 ppm, there is a risk of decreased processability due to scum generation in the fiber molding process and cotton filling process, as well as a decrease in the physical properties of the fiber.

[0023] The molecular weight of the silicon-containing compound is preferably in the range of 5,000 to 50,000. The silicon-containing compound is particularly preferably used when applied as an oil to the surface of fibers. In this case, the silicon-containing compound may be applied alone or mixed with other components that have functions such as electrostatic, convergent, antibacterial, or repellent properties. The other components preferably include alkyl phosphate metal salts in the oil, and particularly preferably include alkyl phosphate metal salts with 8 to 18 carbon atoms, such as lauryl phosphate metal salts.

[0024] Furthermore, from the viewpoint of durability of the silicon component from shedding from the fibers, it is preferable that the silicon-containing compound undergoes a crosslinking reaction. To achieve a crosslinking reaction, it is necessary to have multiple reactive functional groups, and in this case, using amino-modified polysiloxane, hydroxy-modified polysiloxane, or a mixture thereof is particularly effective. Furthermore, it is also preferable to further mix in reactive components other than amino-modified polysiloxane and hydroxy-modified polysiloxane. If the above durability is not required, non-reactive components such as dimethylpolysiloxane and polyoxyethylene copolymerized dimethylpolysiloxane can be used, resulting in flexible short fibers. For adjusting processability and the hydrophilicity of the fibers, it is preferable to use dimethylpolysiloxane copolymerized with a polyoxyethylene component. Most generally, unmodified dimethylpolysiloxane is preferred. Such silicon-containing compounds are treated by applying them to the fibers as a solution and then drying them, and are then incorporated into the stuffing.

[0025] When added as a compound, if the silicon content is too low, defects such as poor fiber opening and single-fiber breakage may increase. On the other hand, if the silicon content is too high, the excess component may form scum, detach and contaminate during the processing stage, potentially degrading the process performance.

[0026] Furthermore, spray-molded products can also be made by blending the stuffing cotton of the present invention with heat-adhesive fibers in an amount of 5 to 20% by weight (more preferably 10 to 20% by weight) relative to the weight of the spray-molded product. If the weight ratio of heat-adhesive fibers is less than 5% by weight, the shape stability of the spray-molded product may be poor, and if it exceeds 20% by weight, the flexibility, bulkiness, and heat retention may be poor.

[0027] The stuffing cotton of the present invention has an excellent heat retention effect due to (I) interfiber voids, (II) voids (hollows) in the fiber structure, and preferably further (III) infrared absorption by the fibers themselves. Regarding its heat retention, both the short fiber A and the hollow short fiber B are fine-denier fibers, and the interfiber voids are dense, forming a large network structure, resulting in a high heat retention effect through suppression of air convection by physical shielding between fibers and infrared absorption (related to I). As for the voids in the fiber structure, since the short fiber B is highly hollow and fine-denier, both the effect of suppressing air convection and the effect of absorbing infrared rays are obtained (related to II). Furthermore, in a preferred embodiment, by using a short fiber C containing an infrared absorbent, a heat retention effect is obtained due to the infrared absorption effect (related to III).

[0028] There are no specific requirements for the fiber opening method, but mechanical opening (carding) is a common method. Alternatively, you can use an air gun (compressed air) to open the fibers. This method is effective if there are concerns about the fiber wrapping around the cylinder, the generation of fuzzy fibers, or neps during the mechanical opening process.

[0029] In the stuffing cotton of the present invention, the fiber length of the short fibers is preferably in the range of 3 to 80 mm. In particular, when card opening is performed, 20 to 80 mm is preferred, when air opening is performed, 3 to 20 mm is preferred, and 3 to 9 mm is more preferred. Because the stuffing cotton of the present invention has the above-described structure, it has excellent bulkiness and heat retention properties, as well as excellent processability.

[0030] Next, the garment of the present invention is a garment in which the aforementioned stuffing is enclosed between the outer fabric and the inner fabric. In this case, it is preferable that the garment be used in which the stuffing is enclosed as stuffing between the outer fabric and the inner fabric. In this case, the air permeability between the outer fabric and the inner fabric is 0.05 to 5.00 cm. 3 / cm 2 It is preferable that the range is within / s. The breathability between the outer and inner fabrics is 0.05 cm. 3 / cm 2 If the breathability is less than / s, it tends to get stuffy when sweating, which is undesirable from a comfort standpoint. 3 / cm 2If the temperature exceeds 1 / s, body heat is easily lost due to the convection effect of the air, which may reduce heat retention. In particular, it is preferable that the stuffing cotton be enclosed with a porosity of 97% or more (more preferably 98.00 to 99.99%) and a thickness of 5 mm or more (more preferably 10 to 200 mm). The smaller the porosity, the more high-thermal-conductivity fibers can be used for filling, which may reduce heat retention. (The thermal conductivity of synthetic materials such as polyester fibers and nylon fibers is an order of magnitude higher than that of air, which is 0.0241 W / m·K. Generally, lower thermal conductivity results in better insulation and better heat retention.) Regarding thickness, as indicated in JIS A9520, the greater the thickness, the greater the thermal resistance, which makes it harder for heat to be transferred, and the higher the heat retention effect. Therefore, if the thickness is less than 5 mm, heat retention may decrease. When the stuffing cotton is enclosed as stuffing (padding) for clothing, it may be in the form of a sheet or granular form such as fiber balls.

[0031] Because the garment of the present invention has the above-described structure, it has excellent bulkiness and heat retention. Down jackets and the like are particularly suitable. The stuffing may also be used in bedding such as comforters, cushions, and sleeping bags. [Examples]

[0032] The present invention will be described in detail with reference to embodiments. The measurement items were measured by the following method. (1) Fiber diameter For fibers with a single fiber fineness of 0.11 dtex, 100 fibers were extracted, their diameters were measured using an optical microscope, and the average value was calculated. Other fibers were measured using a scanning electron microscope (SEM) at 350-3500x magnification. Fiber cross-sectional images were taken, and the fiber diameter D (μm) was measured (average value of n=5).

[0033] (2) Fineness (dtex) Measurement of fibers other than fibers with a single fiber fineness of 0.11 dtex was performed in accordance with Method A of Clause 8.5.1 of JIS L1015:2010. For fibers with a single fiber fineness of 0.11 dtex, the fineness was calculated from the measured fiber diameter by the formula: radius (μm) × radius (μm) × 3.1415 × specific gravity ÷ 100. The specific gravity of polyester was 1.38 g / cm 3 .

[0034] (3) Fiber length The fiber length L was measured at a magnification of 20 to 500 times using a scanning electron microscope (SEM) (the average value of 5 samples, n=5).

[0035] (4) Number of crimps and degree of crimp The number of crimps was measured in accordance with Clause 8.12.1 of JIS L1015:2010. For fibers that are not easily visible to the naked eye, measurement was performed using a magnifier such as a microscope. Further, for the degree of crimp of fibers with a single fiber fineness of 0.11 dtex, after collecting a tow having a weight of about 0.13 g and a length of 60 mm under no load, one end of the tow was clamped in the chuck of a tensile tester, the test length a was set to 25 mm, a 1 kg load was applied, and the length after loading b was 26.5 mm. Using these values, the degree of crimp of fibers with a single fiber fineness of 0.11 dtex was calculated as 100×(b-a)÷b = 100×(26.5-25)÷26.5 = 5.7%.

[0036] (5) Cross-sectional shape, void fraction The cross-section was observed via SEM to determine whether the fiber was solid or hollow. The apparent cross-sectional area of the staple fiber and the cross-sectional area of the hollow portion were calculated, and the void fraction of the staple fiber, defined as the proportion of the cross-sectional area of the hollow portion in the apparent cross-sectional area of the fiber, was calculated by the following formula. Void fraction (%) = (Cross-sectional area of hollow portion) / (Cross-sectional area of staple fiber (including hollow portion)) × 100

[0037] (6) Method for preparing heat retention evaluation sample and method for evaluating heat retention A plain-woven fabric (nylon fabric) using nylon fibers (22 dtex) was sewn into a 40 cm × 40 cm cushion shape, and the filling cotton was 100 g / m 2 equivalent, 16 g, 200 g / m 2A 32g sample was used, and its heat retention performance was evaluated according to JIS L1096:2010, method 8.27 A.

[0038] (7) Air permeability The air permeability was measured according to Method 8.26 A (Fragile method) of JIS L1096:2010. In this evaluation, the nylon fabric described in (6) above was evaluated to be 0.24 cm 3 / cm 2 It was / s.

[0039] (8) Thickness The thickness of the heat retention evaluation samples described in (6) above was evaluated in the following order i to iii. i) As an initial thickness, a 5cm square plate was subjected to a 3g load for 1 minute, and the thickness of the central part was measured. ii) 0.5 g / cm³ 2 To that end, a 34cm square board was subjected to a 573g load, and the thickness of the central part was measured after 1 minute. iii) As the final thickness, the thickness of the center of a 5cm square plate was measured after applying a 3g load for 1 minute.

[0040] (9) Porosity Cotton density (g / cm³) 3 The void ratio was calculated from the basis weight described in (6) and the initial thickness measurement described in (8), and the void ratio was measured by 100 - 100 × (density ÷ specific gravity 1.38). The formula for calculating density is as follows: 100g / m 2 Density at filling = (100 / (initial thickness / 1000)) / 1,000,000 200g / m 2 Density at filling = (200 / (initial thickness / 1000)) / 1,000,000 Note that in the density formula, 1000 represents the conversion from mm to m, and 1,000,000 represents m 3 to cm 3 This means converting to [a certain value].

[0041] (Air-splitting method) A cylindrical container with a diameter of 20 cm and a length of 20 cm was prepared with an air gun opening of approximately 5 mm. The lower part of the cylindrical opening was sealed with a lid, and 5 to 15 g of short fibers to be opened were placed inside. The container was then covered with a mesh 200 sieve, and the fibers were opened using compressed air from the air gun for approximately 1 minute.

[0042] [Example 1] Polyethylene terephthalate (PET) chips with an intrinsic viscosity of 0.47 dL / g were melted at 290°C and extruded at a rate of 340 g / min from a spinneret with 2504 round holes. This was then drawn back at a speed of 500 m / min to obtain undrawn polyethylene terephthalate yarn with a single fiber fineness of 2.7 dtex. This undrawn yarn was aligned and drawn in warm water to a total draw ratio of 32.8 times, yielding a tow of 120,000 dtex. Subsequently, the tow was dipped in an oil solution mainly composed of lauryl phosphate salt with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component. Furthermore, crimping was applied using a push-in crimper box to obtain short fibers A with a fiber diameter of 2.8 μm and a fiber length of 32 mm. The crimping count was 23 crimps / 25.4 mm. This short fiber A (10% by weight) and short fiber B (90% by weight), which has a hollow cross-section, a fineness of 1.1 dtex, a fiber length of 51 mm, and a crimp count of 13 per 25.4 mm in three-dimensional crimping, with lauryl phosphate salt as the main oil component, were mixed and carded. The mixture was then enclosed in a 40 cm square thermal insulation fabric in a web-like laminated state, sewn, and the thickness, density, porosity, and thermal insulation properties were evaluated. The evaluation results are shown in Table 1.

[0043] [Example 2] In Example 1, 30% by weight of short fiber A and 70% by weight of short fiber B were mixed, carded and opened, and then enclosed in a 40cm square thermal insulation fabric in a web-like state. The fabric was then sewn, and the thickness, density, porosity, and thermal insulation properties were evaluated. The evaluation results are shown in Table 1.

[0044] [Example 3] Short fiber A (10% by weight) and short fiber B (80% by weight) described in Example 1 were mixed with short fiber C (10% by weight), which has a solid core-sheath cross-section with an infrared absorbent in the sheath, a single fineness of 6.6 dtex, a fiber length of 51 mm, a planar zigzag crimp with 10 crimps / 25.4 mm, and whose oil component is mainly lauryl phosphate salt. The mixture was carded and opened, and then enclosed in a 40 cm square heat-retaining fabric in a web laminated state, sewn, and the thickness, density, porosity, and heat retention were evaluated as described above. The evaluation results are shown in Table 1.

[0045] [Example 4] Short fiber A (10% by weight) and short fiber B (80% by weight) described in Example 1 were mixed with short fiber C (10% by weight), which has a solid core-sheath cross-section, contains 10% by weight of an infrared absorbent in the core, has a single fiber fineness of 1.3 dtex, a fiber length of 51 mm, and a planar zigzag crimp with 10 crimps / 25.4 mm, and whose oil component is mainly lauryl phosphate salt. The mixture was carded and opened, and then enclosed in a 40 cm square thermal insulation fabric in a web laminate state, sewn, and the thickness, density, porosity, and thermal insulation properties were evaluated as described above. The evaluation results are shown in Table 1.

[0046] [Comparative Example 1] The cross-section was hollow, the single fiber fineness was 1.1 dtex, the fiber length was 51 mm, and the crimping count was 13 per 25.4 mm in three-dimensional crimping. The oil component was mainly lauryl phosphate salt. Short fibers were carded and opened, then enclosed in a 40 cm square thermal insulation fabric in a web laminated state, sewn, and the thickness, density, porosity, and thermal insulation properties were evaluated. The evaluation results are shown in Table 1.

[0047] [Comparative Example 2] Polyethylene terephthalate (PET) chips with an intrinsic viscosity of 0.47 dL / g were melted at 290°C and extruded at a rate of 340 g / min from a spinneret with 2504 round holes. This was then drawn back at a speed of 500 m / min to obtain undrawn polyethylene terephthalate yarn with a single fiber fineness of 2.7 dtex. This undrawn yarn was aligned and drawn in warm water to a total draw ratio of 32.8 times, yielding a tow of 120,000 dtex. Subsequently, the tow was dipped in an oil solution mainly composed of lauryl phosphate salt with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component. Furthermore, crimping was applied using a push-in crimper box to obtain short fibers with a fiber diameter of 2.8 μm and a fiber length of 32 mm. The crimping count was 23 per 25.4 mm. The obtained short fibers were subjected to carding and fiber opening treatment, but could not pass through the process due to cylinder entanglement and wind fumes.

[0048] [Comparative Example 3] A short fiber with a hollow cross-section, single fiber fineness of 1.1 dtex, fiber length of 51 mm, and 13 crimps per 25.4 mm in three-dimensional crimping, and whose oil component is mainly lauryl phosphate salt, was mixed with a short fiber with a hollow cross-section, single fiber fineness of 7.7 dtex, fiber length of 51 mm, and 13 crimps per 25.4 mm in three-dimensional crimping, whose oil component is mainly lauryl phosphate salt, with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component, was mixed with a short fiber with a hollow cross-section, single fiber fineness of 7.7 dtex, fiber length of 51 mm, and 13 crimps per 25.4 mm in three-dimensional crimping, and whose oil component is mainly lauryl phosphate salt, with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component, was mixed, carded and opened, and the web-laminated material was enclosed in a 40 cm square thermal insulation fabric and sewn, and the thickness, density, porosity and thermal insulation were evaluated as described above. The evaluation results are shown in Table 1.

[0049] [Comparative Example 4] A short fiber with a hollow cross-section, fineness of 1.1 dtex, fiber length of 51 mm, and 13 crimps per 25.4 mm in three-dimensional crimping, and whose oil component is mainly lauryl phosphate salt, was mixed with another short fiber with a hollow cross-section, single fiber fineness of 7.7 dtex, fiber length of 51 mm, and 13 crimps per 25.4 mm in three-dimensional crimping, whose oil component is mainly lauryl phosphate salt, with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component, was mixed with another short fiber with a hollow cross-section, single fiber fineness of 7.7 dtex, fiber length of 51 mm, and 13 crimps per 25.4 mm in three-dimensional crimping, and whose oil component is mainly lauryl phosphate salt, with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component, was mixed with another short fiber with a hollow cross-section, single fiber fineness of 7.7 dtex, fiber length of 51 mm, and whose oil component is mainly lauryl phosphate salt, with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component, was carded and opened, and the resulting web-laminated material was enclosed in a 40 cm square thermal insulation fabric and sewn. The thickness, density, porosity, and thermal insulation properties were then evaluated. The evaluation results are shown in Table 1.

[0050] [Comparative Example 5] Polyethylene terephthalate (PET) chips with an intrinsic viscosity of 0.47 dL / g were melted at 290°C and extruded at a rate of 340 g / min from a spinneret with 2504 round holes. This was then drawn back at a speed of 500 m / min to obtain undrawn polyethylene terephthalate yarn with a single fiber fineness of 2.7 dtex. These undrawn yarns were aligned and drawn in warm water to a total draw ratio of 32.8 times, yielding a tow of 120,000 dtex. Subsequently, the tow was dipped in an oil solution mainly composed of lauryl phosphate salt with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component. Furthermore, crimping was applied using a push-type crimper box to obtain short fibers with a fiber diameter of 2.8 μm and a fiber length of 5 mm. The crimping count was 23 per 25.4 mm. The obtained short fibers were subjected to the aforementioned air-opening treatment and packed into a 40cm square heat-retaining fabric. The thickness, density, porosity, and heat retention were then evaluated. The evaluation results are shown in Table 1.

[0051] [Comparative Example 6] The short fibers, with a hollow cross-section, a single fiber fineness of 1.1 dtex, a fiber length of 51 mm, and 13 crimps per 25.4 mm in three-dimensional crimping, and primarily composed of lauryl phosphate salt as the oil component, were subjected to air-opening treatment and packed into a 40 cm square heat-retaining fabric. The thickness, density, porosity, and heat retention were then evaluated. The evaluation results are shown in Table 1.

[0052] [Comparative Example 7] The cross-section has a core-sheath structure, with an infrared absorbent in the sheath portion. The single fiber has a fineness of 6.6 dtex, a fiber length of 51 mm, and is crimped in a planar zigzag pattern with 10 crimps per 25.4 mm. The oil component is mainly lauryl phosphate salt. Short fibers were subjected to air-opening treatment and packed into a 40 cm square heat-retaining fabric. The thickness, density, porosity, and heat retention were evaluated as described above. The evaluation results are shown in Table 1.

[0053] [Comparative Example 8] The short fibers were hollow in cross-section, with a single fiber fineness of 7.7 dtex, a fiber length of 51 mm, and a crimp count of 13 per 25.4 mm in three-dimensional crimping. The oil component mainly consisted of lauryl phosphate salt, with dimethylpolysiloxane (Mw=10000) added as a silicon-containing component. After carding, the aforementioned air-opening treatment was performed on the short fibers, and the fill power and flexibility were evaluated. The evaluation results are shown in Table 1.

[0054] [Table 1-1]

[0055] [Table 1-2]

[0056] [Table 1-3] [Industrial applicability]

[0057] According to the present invention, stuffing cotton and clothing with excellent bulkiness, heat retention, and processability can be obtained, and their industrial value is extremely high.

Claims

1. A stuffing material characterized by containing 10 to 30% by weight of polyester staple fibers A with a single fiber fineness of 0.05 to 0.1 dtex and 70 to 90% by weight of hollow polyester staple fibers B with a single fiber fineness of 0.5 to 1.1 dtex, wherein the hollowness ratio of the hollow polyester staple fibers B is 35% or more, and the hollow polyester staple fibers B have three-dimensional crimp.

2. The stuffing cotton according to claim 1, wherein the short fibers A are given a zigzag crimp with a crimp count of 16 to 30 per 2.54 cm.

3. Furthermore, the stuffing cotton according to claim 1, comprising short fibers made of core-sheath type composite fibers with a single fiber fineness of 0.5 to 8 dtex, wherein at least one of the core portion and the sheath portion contains an infrared absorbent short fiber C.

4. The stuffing cotton according to claim 1, wherein the stuffing cotton is in the form of a sheet or granules.

5. The stuffing cotton according to claim 1, wherein all the fibers constituting the stuffing cotton are polyethylene terephthalate fibers.

6. A garment in which the stuffing cotton described in any one of Claims 1 to 5 is enclosed between the outer fabric and the inner fabric.

7. The breathability of the outer and inner fabrics is 0.05 to 5.00 cm. ３ / cm ２ The garment according to claim 6, which is within the range of / s.

8. The garment according to claim 6, wherein the stuffing is enclosed such that the void ratio of the stuffing is 97% or more and the thickness is 5 mm or more.

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