Bedding

Abstract

To provide bedding that is less likely to shift in position. 【Solution means】The bedding according to the present invention includes ultra-fine fibers with a single fiber diameter of 8 μm or less, and is characterized in that the cover factor Er calculated by the following formula is 60 to 90%. Cover factor Er = Ej + Ew - (Ej × Ew) / 100 Ej = Number of warp threads (within 10 cm) × Thread diameter (mm), Ew = Number of weft threads (within 10 cm) × Thread diameter (mm)

Description

Technical Field

[0001] The present invention relates to bedding.

Background Art

[0002] For bedding such as quilts, quilt covers, and pillowcases, generally, a smooth surface property with a good touch is preferred. Also, for the quilt fabric, it is necessary to prevent the batting stuffed inside the fabric from bulging outwards. Therefore, the fabric used for bedding often has a high weave density or is subjected to embossing processing (calendering) by pressing with a heating roller.

[0003] On the other hand, when the weave density is increased or embossing processing is performed, there is a problem that displacement is likely to occur. That is, there are problems such as the quilt being displaced inside the quilt cover or the pillow slipping off on a reclining bed. As a method for preventing such displacement, for example, in the invention of Patent Document 1, small pieces of friction materials made of a soft resin, synthetic rubber, etc. are fixed to the quilt cover or the quilt. However, with such a method, there is a risk of impairing the lightness and softness of the quilt and the quilt cover.

[0004] Also, the invention of Patent Document 2 has been proposed as a quilt cover that is less likely to be displaced. The invention of this Patent Document 2 uses a fiber A with a single fiber fineness of 10 to 10000 nm that is difficult to slip and is mixed with a fiber B of highly shrinkable polyester for shape retention. However, with such a method, since the anti-slip performance of the fiber A with a single fiber fineness of 10 to 10000 nm is inhibited by the fiber B of highly shrinkable polyester, displacement prevention is not necessarily sufficient.

[0005] On the other hand, in order to prevent the displacement of the quilt, usually, a string sewn inside the quilt cover is tied to a loop (ring) sewn at a plurality of locations around the four corners of the quilt. However, since displacement prevention by the loop is local, it is not possible to evenly prevent the displacement of the quilt over the entire quilt.

[0006] Therefore, there are problems such as: 1) wrinkles form on the surface of the hanging cover, resulting in a poor appearance; 2) the hanging futon and the hanging cover rub against each other, generating an annoying rubbing sound; 3) gaps are likely to form around the neck, and the heat retention is not good. Also, when taking the futon in and out for washing the hanging cover, there is a problem that the detachment of the ties at multiple locations is extremely troublesome.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0008] The present invention has been made in view of the above circumstances, and an object thereof is to provide bedding that is difficult to shift in position.

Means for Solving the Problems

[0009] The bedding of the present invention for achieving the above object includes ultra-fine fibers having a single fiber diameter of 8 μm or less, and is characterized in that the cover factor Er calculated by the following formula is 60 to 90%. Cover factor Er = Ej + Ew - (Ej × Ew) / 100 Ej = number of warp threads (within 10 cm) × thread diameter (mm), Ew = number of weft threads (within 10 cm) × thread diameter (mm)

Effects of the Invention

[0010] According to the present invention, it is possible to prevent the displacement of the bedding.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the bedding according to the present invention will be described. Here, "bedding" refers to all things necessary for sleeping, such as futons, pillows, sheets, and mattresses used when sleeping. Bedding includes feather futons, synthetic fiber futons, futon side fabrics, covers, box sheets, pillow covers, bed pads, and the like.

[0013] The fabric of the bedding according to the embodiment of the present invention contains ultra-fine fibers with a single fiber diameter of 8 μm or less. The surface of the fabric becomes an adhesive fine three-dimensional structure due to the ultra-fine fibers of 8 μm or less, and a large frictional resistance can be obtained. In addition, the ultra-fine fiber yarn produces not only a fitting property that adheres but also a soft texture (anti-wrinkle effect), so it is optimal as a fabric for futon side fabrics, covers, or pillow covers.

[0014] Specifically, the fabric of the bedding according to the embodiment of the present invention contains ultra-fine fiber yarns (filament yarns) with a single fiber diameter of 0.2 μm to 8 μm, and the cover factor Er calculated by the following formula is 60% to 90%. Cover factor Er = Ej + Ew - (Ej × Ew) / 100 Ej = number of warp yarns (within 10 cm) × yarn diameter (mm), Ew = number of weft yarns (within 10 cm) × yarn diameter (mm)

[0015] If the single fiber diameter is smaller than 0.2 μm, the fiber strength decreases, which is not preferable in practical use. Conversely, if the single fiber diameter is larger than 8.0 μm, there is a possibility that a sufficient anti-slip effect cannot be obtained, which is not preferable.

[0016] Here, when the cross-sectional shape of the single fiber is an irregular cross-section other than a round cross-section, the diameter of the circumscribed circle is taken as the single fiber diameter. The single fiber diameter can be measured by photographing the cross-section of the fiber with a transmission electron microscope.

[0017] The material constituting the ultrafine fiber is not particularly limited. Examples of the material constituting the ultrafine fiber include polyester, polyamide, polyolefin, polyphenylene sulfide (PPS), and the like.

[0018] Examples of polyester include polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polylactic acid (PLA), and the like. Examples of polyamide include nylon 6 (N6), nylon 66 (N66), nylon 11 (N11), and the like.

[0019] Examples of polyolefin include polyethylene (PE), polypropylene (PP), polystyrene (PS), and the like. In addition to the above materials, it is also possible to use phenolic resin, polyacrylonitrile (PAN), polyvinyl alcohol (PVA), polysulfone, fluorine-based polymer, cellulose, and their derivatives.

[0020] There are two types of fabrics for the futon side fabric or the futon cover, namely Embodiment 1 and Embodiment 2. The material of Embodiment 1 has two specifications, A and B, which will be described later, depending on the difference in the number of yarn filaments.

[0021] ● Embodiment 1 The details of the fabric of Embodiment 1 are as shown in Table 1 below. It should be noted that each numerical value in the table is exemplary, and it goes without saying that the fabric according to the present invention is not limited to these numerical values.

Table 1

[0022] <Calculation formula for cover factor Er> Er = Ej + Ew - (Ej × Ew) / 100 Here, Ej = number of warp yarns (within 10 cm) × diameter of yarn (mm), Ew = number of weft yarns (within 10 cm) × diameter of yarn (mm).

[0023] When calculating Ej and Ew based on the total fineness and diameter of the warp and weft yarns, Ej = 58.76377953 and Ew = 75.7007874. Therefore, the cover factor is 89.98% according to the above calculation formula.

[0024] Specification A Warp: 100% polyester, 83.325 dtex / 144 f (Single fiber diameter 7.32 μm, single fiber fineness 0.58 dtex) Weft: 80% polyester / 20% nylon split fiber composite yarn (150 d / 72 f) Total fineness: 166.65 dtex Diameter: 124 μm (polyester single fiber diameter 0.462 μm, single fiber fineness 0.23 dtex / nylon single fiber diameter 0.232 μm, single fiber fineness 0.058 dtex)

[0025] Specification B Warp: 100% polyester, 83.325 dtex / 288 f (Single fiber diameter 5.16 μm, single fiber fineness 0.289 dtex) Weft: 80% polyester / 20% nylon split fiber composite yarn (150 d / 72 f) Total fineness: 166.65 dtex Diameter: 124 μm (polyester single fiber diameter 0.462 μm, single fiber fineness 0.23 dtex / nylon single fiber diameter 0.232 μm, single fiber fineness 0.058 dtex)

[0026] ●Embodiment 2 Details of the fabric of Embodiment 2 are as shown in Table 2 below. In this fabric, the fibers are refined by raising treatment, thereby enhancing the effect of preventing displacement. It should be noted that each numerical value in the table is exemplary, and it goes without saying that the fabric according to the present invention is not limited to these numerical values.

Table 2

[0027] Specifications of the warp and weft (single fibers) are as follows. Warp: 100% polyester 83.325 dtex / 144 f (filament diameter 7.32 μm, filament fineness 0.58 dtex) Weft: 100% polyester 83.325 dtex / 144 f (filament diameter 7.32 μm, filament fineness 0.58 dtex)

[0028] <Calculation formula for cover factor Er> Er = Ej + Ew - (Ej × Ew) / 100 Here, Ej = number of warp threads (within 10 cm) × thread diameter (mm), Ew = number of weft threads (within 10 cm) × thread diameter (mm).

[0029] Based on the total fineness and diameter of the warp and weft threads, when calculating Ej and Ew, Ej = 54.61574803 and Ew = 31.11023622. Therefore, the cover factor is 68.73% according to the above calculation formula.

[0030] On the entire surface of the futon-side fabric or the cover fabric, ultrafine fibers such as nanofibers (0.2 μm) to microfibers (2.64 μm) are evenly exposed over the entire futon-side fabric and cover according to the above conditions. As a result, the contact area between the futon-side fabric and the cover becomes wider over the entire fabric surface, generating a large frictional resistance. Thereby, the futon and the cover are less likely to slip, and an anti-wrinkle effect is exhibited in which they fit together and wrinkles are less likely to form on the cover surface.

[0031] However, considering the insertion and removal of the futon and the attachment and detachment of the cover, it is desirable that the futon and the cover are less likely to slip and the magnitude of the frictional resistance is within a range where the insertion and removal of the futon and the attachment and detachment of the cover are easy. That is, it is desirable to set the specifications of the fabric so that the coefficient of friction between the fabrics is within the range of 1.6 to 1.8.

[0032] Specifically, as shown in Fig. 1, the cushion modeled after a futon has a size such that it does not slide even at an inclined plate angle of 64°, and it has a coefficient of friction such that when the angle of the inclined plate is further increased from 65° to 70°, it begins to slide. In contrast, the cushion in the comparative example of Fig. 2 began to slide between an inclined plate angle of 40° and 45°.

[0033] (Specifications of the cushion in Fig. 1) Size: 38 cm x 38 cm, Weight: approximately 100 g (filled with 100 g of feathers), Contact area with the floor: 0.6 m 2 Side fabric: Using the high-density woven fabric of Embodiment 1 (Specification A) of the present invention modeled after the futon side fabric (Specifications of the inclined table) Using a material with the high-density woven fabric of Embodiment 1 (Specification A) of the present invention modeled after the hanging cover fabric attached to the surface of a plywood board

[0034] (Specifications of the cushion in the comparative example of Fig. 2) Size: 38 cm x 38 cm, Weight: approximately 100 g (filled with 100 g of feathers), Contact area with the floor: 0.6 m 2 Side fabric: Using a general high-density woven fabric modeled after the futon side fabric (Specifications of the inclined table) Using a material with a general high-density woven fabric modeled after the hanging cover fabric attached to the surface of a plywood board

[0035] When a general high-density woven fabric is used for the cushion and the inclined table, as shown in Fig. 2, the cushion began to slide between 40° and 45°. In contrast, when the high-density woven fabric of Embodiment 1 (Specification A) of the present invention is used for the cushion and the inclined table, as shown in Fig. 1, it did not slide even at an angle of 64°. The coefficient of friction μ at an angle of 60° is μ = cos60° / sin30° = 1.73.

[0036] Table 3 shown below is the result of examining the fit between the duvet and the duvet cover and the ease of putting the duvet in and out when the coefficient of friction between high-density woven fabrics is changed. When the coefficient of friction is less than 1.6, the ease of putting in and out is sufficient (○), but the fit is insufficient (△). When the coefficient of friction exceeds 1.8, the fit is sufficient (○), but the ease of putting in and out is insufficient (△).

Table 3

[0037] On the other hand, when the coefficient of friction is in the range of 1.6 to 1.8, both the fit and the ease of putting in and out are sufficient (○). From the results of this Table 3, it was confirmed that by setting the specifications of the fabric so that the coefficient of friction is in the range of 1.6 to 1.8, good fit and ease of putting in and out can be obtained. Also, due to the good fit, an anti-wrinkle effect can be obtained in which wrinkles are less likely to form on the surface of the duvet cover.

[0038] ● Blended weaving of antistatic yarn When static electricity is generated between the duvet and the duvet cover, the ease of putting the duvet in and out may deteriorate. Therefore, in order to prevent the generation of such static electricity, antistatic yarn can be blended in the warp direction of the fabric.

[0039] For the blending ratio, for example, one antistatic yarn is blended at intervals of 2 cm. Various antistatic yarns can be used as the antistatic yarn. For example, a core-sheath composite fiber with a two-layer structure of core and sheath can be used, and a core-sheath fiber yarn using nylon for the sheath part and a metal compound for the core part can be used.

[0040] The single fiber diameter of this core-sheath fiber yarn is preferably in the range of 0.2 μm to 8.0 μm, but it may also be outside the range of 0.2 μm to 8.0 μm. If the blending ratio is one antistatic yarn at intervals of 2 cm, even if the single fiber diameter of the antistatic yarn is outside the range of 0.2 μm to 8.0 μm, it will not particularly affect the good fit and ease of putting in and out of the fabric.

[0041] As described above, the present invention has been specifically described based on the embodiments. However, it goes without saying that the present invention is not limited to the above embodiments and can be variously modified within the scope of the technical idea described in the claims. For example, the ultra-fine fiber yarn with a single fiber diameter of 0.2 μm to 8.0 μm may be composed of polyester as in Embodiments 1 and 2, or may be composed of other polymers such as polypropylene, nylon 6, and nylon 66.

Claims

1. A bedding product comprising ultra-fine fibers having a single fiber diameter of 8 μm or less, and having a cover factor Er calculated by the following formula of 60 to 90%, The bedding comprises ultra-fine fiber yarns as warp yarns, the ultra-fine fiber yarns having a single fiber diameter of 4 μm to 8 μm and made of 100% polyester, and ultra-fine fiber yarns as weft yarns, the ultra-fine fiber yarns having a single fiber diameter of 4 μm or less and made of split fiber composite yarns of 80% polyester and 20% nylon, the single fiber diameter of the polyester weft yarn being 0.4 to 0.5 μm, and the single fiber diameter of the nylon weft yarn being 0.2 to 0.3 μm. Cover factor Er = Ej + Ew - (Ej x Ew) / 100 Ej = number of warp threads (within 10 cm) x thread diameter (mm), Ew = number of weft threads (within 10 cm) x thread diameter (mm)

2. 2. The bedding of claim 1, wherein the surfaces of the warp and weft threads are napped.

3. 3. The bedding according to claim 1, wherein the coefficient of friction between the fabrics of the bedding is 1.6 to 1.

8.

4. 4. The bedding according to claim 3, characterized in that electrostatic yarns are mixed and woven into the warp yarns.

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