Moisturizing fabrics and underwear containing such fabrics

Abstract

This invention provides a moisturizing fabric comprising regenerated collagen fibers. The fabric exhibits a skin moisture increase rate of 0.8% to 1.8% over two hours, and a moisture absorption of 0.70 mg / cm³ over two hours. 2 The above is true. Preferably, the moisturizing fabric contains 40% to 70% by weight of regenerated collagen fibers. Furthermore, the present invention relates to underwear comprising a moisturizing fabric. Thus, it is possible to provide a moisturizing fabric and underwear comprising such a fabric that offers good moisturizing and softness and is not stuffy.

Description

Technical Field

[0001] This invention relates to a moisturizing fabric with excellent moisture retention and softness, and which is not stuffy, and to underwear containing the fabric. Background Technology

[0002] In the past, for fabrics that come into contact with the skin, such as underwear, moisturizing properties were imparted to prevent dryness due to loss of moisture from the skin. For example, in Patent Document 1, moisturizing properties were imparted by attaching a moisturizing agent to the fabric using an adhesive.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2-300301 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] However, in conventional underwear materials such as those cited in Reference 1, there are concerns about poor durability due to the pre-applied moisturizing agents.

[0008] In addition, for underwear fabrics, in order to ensure a comfortable wearing experience, they are also required to be breathable and soft.

[0009] In view of the above, the present invention provides a moisturizing fabric with good moisture retention and softness, and which is not stuffy, as well as underwear made of the fabric.

[0010] Methods for solving problems

[0011] This invention relates to a moisturizing fabric, characterized in that: the moisturizing fabric comprises regenerated collagen fibers, the skin moisture increase rate of the moisturizing fabric is 0.8% or more and 1.8% or less over two hours, and the moisture absorption is 0.70 mg / cm³ over two hours. 2 above.

[0012] Furthermore, the present invention relates to underwear, characterized in that it comprises a moisturizing fabric.

[0013] Invention Effects

[0014] According to the present invention, a moisturizing fabric with good moisture retention and softness, and which is not stuffy, and underwear containing the fabric can be provided. Detailed Implementation

[0015] The inventors of this invention conducted in-depth research on improving the moisturizing properties, softness, and heat resistance of fabrics that come into contact with the skin surface. The result was the discovery that by incorporating regenerated collagen fibers into the fabric, achieving a two-hour skin moisture increase rate and two-hour moisture absorption at a predetermined level, excellent moisturizing properties are maintained even without the application of a moisturizer, along with good softness and the ability to suppress skin heat, thus completing this invention. The reason for this is not entirely clear, but it is speculated that the fabric containing regenerated collagen fibers prevents dryness of the skin surface and also prevents skin heat by moderately absorbing and retaining moisture. Furthermore, when the skin is properly covered with a fabric containing regenerated collagen fibers, the fabric, with its excellent moisturizing properties, absorbs moisture while limiting moisture evaporation, thus providing insulation without lowering the temperature. In one or more embodiments of this invention, "regenerated collagen fibers" means regenerated collagen fibers in a cross-linked state (also referred to as insoluble).

[0016] (Moisturizing fabric)

[0017] The skin moisture increase rate of the moisturizing fabric after two hours is 0.8% or more and 1.8% or less. If the skin moisture increase rate exceeds 1.8% after two hours, it causes skin stuffiness. If the skin moisture increase rate is less than 0.8% after two hours, the skin becomes dry. From the viewpoint of moisturizing, it is preferable that the skin moisture increase rate of the moisturizing fabric after two hours is 0.9% or more, more preferably 1.0% or more, further preferably 1.1% or more, and particularly preferably 1.2% or more. From the viewpoint of not causing stuffiness, it is preferable that the skin moisture increase rate of the moisturizing fabric after two hours is 1.7% or less, more preferably 1.6% or less, further preferably 1.5% or less, and particularly preferably 1.4% or less. Specifically, it is preferable that the skin moisture increase rate of the moisturizing fabric after two hours is 0.9% or more and 1.7% or less, more preferably 1.0% or more and 1.6% or less, further preferably 1.1% or more and 1.5% or less, and particularly preferably 1.1% or more and 1.4% or less.

[0018] The moisture-absorbing fabric has a moisture absorption rate of 0.70 mg / cm³ after two hours. 2 The above. Therefore, it can prevent dryness of the skin surface. The preferred moisturizing fabric has a moisture absorption of 0.75 mg / cm³ over two hours. 2 The above, more preferably 0.80 mg / cm³ 2 The above is further preferred to be 0.85 mg / cm³. 2 That's all. Furthermore, from a skin feel perspective, the preferred moisture-wicking fabric has a two-hour moisture absorption of 1.8 mg / cm³. 2 The following is more preferably 1.5 mg / cm³ 2 The following is a further preferred value: 1.10 mg / cm³2 Specifically, the preferred moisture-absorbing fabric has a two-hour moisture absorption of 0.70 mg / cm³. 2 Above and 1.8 mg / cm 2 The following is more preferably 0.75 mg / cm³. 2 Above and 1.5 mg / cm 2 The following is a further preferred value: 0.80 mg / cm³ 2 Above and 1.3 mg / cm 2 The following is particularly preferred: 0.85 mg / cm³ 2 Above and 1.10 mg / cm 2 the following.

[0019] The two-hour skin moisture increase rate and two-hour moisture absorption of the moisturizing fabric were measured as follows.

[0020] (Skin moisture gain rate and moisture absorption rate over two hours)

[0021] (1) Cut the fabric of the test object into a certain size (3cm×6cm). In order to fix it to the skin surface, stick transparent tape on the cut fabric and measure the weight of the fabric with tape attached, which is set as W1.

[0022] (2) The skin moisture content of the inner forearm with the attached fabric was measured using a capacitive moisture meter and denoted as Sw1.

[0023] (3) Apply the adhesive tape to the inside of the forearm with the fabric in contact with the skin.

[0024] (4) After two hours of storage, the adhesive tape fabric was collected, the weight was measured and set as W2, and the moisture absorption amount after two hours was calculated by the following formula (1).

[0025] (5) Measure the moisture content of the skin surface on the inner side of the forearm after the fabric is peeled off, denoted as Sw2, and calculate the skin moisture increase rate over two hours using the following formula (2).

[0026] Furthermore, the measurements were conducted at a temperature of 23±2℃ and a relative humidity of 65±5%.

[0027] [Formula 1]

[0028] Moisture absorption in two hours (g / cm³) 2 )=(W2-W1)g / (3×6)cm 2

[0029] [Formula 2]

[0030] Two-hour skin moisture increase rate (%) = [(Sw2-Sw1) / Sw1]×100

[0031] The moisturizing fabric has excellent wash durability. For example, preferably, the increase in skin moisture after 50 washes is 0.8% or more and 1.8% or less two hours later, more preferably 0.9% or more and 1.7% or less, even more preferably 1.0% or more and 1.6% or less, even more preferably 1.1% or more and 1.5% or less, and particularly preferably 1.1% or more and 1.4% or less.

[0032] Moisturizing fabrics exhibit excellent wash durability; for example, preferably, the moisture absorption after 50 washes is 0.70 mg / cm³ two hours later. 2 Above and 1.8 mg / cm 2 The following is more preferably 0.75 mg / cm³. 2 Above and 1.5 mg / cm 2 The following is a further preferred value: 0.80 mg / cm³ 2 Above and 1.3 mg / cm 2 The following is particularly preferred: 0.85 mg / cm³ 2 Above and 1.10 mg / cm 2 the following.

[0033] Moisturizing fabrics possess excellent bending properties; for example, from the viewpoint of having a soft hand feel, a stiffness B of 0.19 gf·cm is preferred. 2 / cm or less, more preferably 0.18 gf·cm 2 Below / cm, further preferably 0.16gf·cm 2 / cm or less. For moisture-retaining fabrics, considering excellent elasticity and sewingability, a stiffness B of 0.015 gf·cm is preferred. 2 / cm or more, more preferably 0.020 gf·cm 2 / cm or higher, further preferably 0.030gf·cm 2 / cm or higher. Specifically, the preferred stiffness B is 0.015gf·cm. 2 / cm or more and 0.19gf·cm 2 / cm or less, more preferably 0.020 gf·cm 2 / cm or more and 0.18gf·cm 2 Below / cm, further preferably 0.030 gf·cm 2 / cm or more and 0.16gf·cm 2 / cm or less.

[0034] The moisture-retaining fabric exhibits excellent bending properties. For example, from the viewpoint of having a soft hand feel, a bending hysteresis 2HB of 0.45 gf·cm / cm or less is preferred, more preferably 0.42 gf·cm / cm or less, even more preferably 0.40 gf·cm / cm or less, and particularly preferably 0.38 gf·cm / cm or less is also preferred. From the viewpoint of excellent elasticity and sewingability, the moisture-retaining fabric preferably has a bending hysteresis 2HB of 0.015 gf·cm / cm or more, more preferably 0.020 gf·cm / cm or more, even more preferably 0.040 gf·cm / cm or more, and particularly preferably 0.070 gf·cm / cm or more. Specifically, the moisture-retaining fabric preferably has a bending hysteresis 2HB of 0.015 gf·cm / cm or more and 0.45 gf·cm / cm or less, more preferably 0.020 gf·cm / cm or more and 0.42 gf·cm / cm or less, even more preferably 0.040 gf·cm / cm or more and 0.40 gf·cm / cm or less, and particularly preferably 0.070 gf·cm / cm or more and 0.38 gf·cm / cm or less.

[0035] The stiffness (B) and bending hysteresis (2HB) of the moisture-retaining fabric can be determined using a KES-FB3 (manufactured by Katolac). One end of the sample (effective length 20cm, width 1cm) is fixed, and the other end is moved, with a curvature K = ±2.5cm. -1 The range is within a constant speed (deformation speed 0.5cm). -1 The measurement was performed under conditions of ( / second).

[0036] Moisturizing fabrics possess excellent cutting properties. For example, from the viewpoint of softness and body comfort, a shear stiffness G of 0.45 gf / cm·deg or less is preferred, more preferably 0.42 gf / cm·deg or less, and even more preferably 0.39 gf / cm·deg or less is preferred. From the viewpoint of having a soft hand feel and sewingability, a shear stiffness G of 0.15 gf / cm·deg or more is preferred, more preferably 0.18 gf / cm·deg or more, and even more preferably 0.20 gf / cm·deg or more is preferred. Specifically, a moisturizing fabric preferably has a shear stiffness G of 0.15 gf / cm·deg or more and 0.45 gf / cm·deg or less, more preferably 0.18 gf / cm·deg or more and 0.42 gf / cm·deg or less, and even more preferably 0.20 gf / cm·deg or more and 0.42 gf / cm·deg or less is preferred.

[0037] The shear stiffness G of the moisture-retaining fabric can be measured using a KES-FB1 (KATOLEC) specimen (20cm×20cm) under the conditions of a shear force of 2.5gf / cm, a shear strain rate of 0.00834 / s, and a shear angle of ±8°.

[0038] From the viewpoint of excellent heat retention, when the moisturizing fabric is applied to the skin, the difference (T1-T2) between the skin surface temperature T1 after 1 hour and the skin surface temperature T2 after 2 hours is preferably less than 0.10°C, more preferably less than 0.08°C, and even more preferably less than 0.06°C.

[0039] Moisturizing fabrics contain regenerated collagen fibers. There are no particular limitations on the regenerated collagen fibers used; any known regenerated collagen fibers may be suitable. For example, regenerated collagen fibers can be obtained by dissolving collagen raw materials to make them soluble, spinning the resulting soluble collagen solution, and then cross-linking (insoluble) the resulting soluble regenerated collagen fibers.

[0040] As a raw material for collagen, the hides of animals such as cattle, pigs, horses, deer, and rabbits can be used. Fresh hides and salt-treated raw hides from animals such as cattle are preferred. Since the collagen contained in such raw materials is partially cross-linked and insoluble, it undergoes a soluble treatment to break down the cross-links. Known methods for soluble treatment include alkali-soluble methods and enzyme-soluble methods.

[0041] Collagen that can be dissolved in water through a soluble treatment can be prepared into a spinning solution with a collagen (solids) concentration of 1% to 15% by weight, preferably 2% to 10% by weight, and a pH of 2 to 4.5, using aqueous solutions of acids such as hydrochloric acid, acetic acid, or lactic acid. Furthermore, the obtained collagen spinning solution can be degassed under reduced pressure and stirred as needed, and filtered to remove water-insoluble components, i.e., fine dust. By expelling the collagen spinning solution, for example, through a spinning nozzle and slit, into an aqueous solution of inorganic salts or an organic solvent and allowing it to solidify, soluble regenerated collagen fibers can be formed. Collagen fibers can be obtained by crosslinking the obtained soluble regenerated collagen fibers with a crosslinking agent to make them insoluble. There are no particular limitations on the crosslinking agent; for example, organic crosslinking agents or metal compounds can be used. Examples of organic crosslinking agents include aldehyde compounds such as formaldehyde and epoxy compounds such as epichlorohydrin. Examples of metal compounds include zirconium salts and aluminum salts. These organic crosslinking agents or metal compounds can be used alone or in combination of two or more.

[0042] From the viewpoints of moisture retention, softness, and resistance to stuffiness, the moisturizing fabric preferably contains 40% by weight or more of regenerated collagen fibers, more preferably 45% by weight or more, even more preferably 50% by weight or more, and particularly preferably 55% by weight or more. The moisturizing fabric may also be formed from 100% by weight of regenerated collagen fibers, but from the viewpoints of tensile properties, cut properties, and bending properties, it is preferable to contain 80% by weight or less of regenerated collagen fibers, more preferably 75% by weight or less, and even more preferably 70% by weight or less.

[0043] From the viewpoint of excellent moisturizing properties, softness, non-suffocating properties, hand feel, and tensile strength, the moisturizing fabric preferably contains 40% to 70% by weight of regenerated collagen fibers and 30% to 60% by weight of other fibers. More preferably, it contains 45% to 65% by weight of regenerated collagen fibers and 35% to 55% by weight of other fibers. Even more preferably, it contains 45% to 60% by weight of regenerated collagen fibers and 40% to 55% by weight of other fibers.

[0044] There are no particular limitations on other fibers; commonly used natural and chemical fibers, such as those found in underwear, can be used. Examples of natural fibers include animal hair fibers such as wool, and natural cellulose fibers such as cotton and linen. Suitable chemical fibers include polyester fibers, acrylonitrile fibers (polyacrylonitrile fibers), acrylic fibers (modified polyacrylonitrile fibers), nylon fibers, and cellulose fibers. Cellulose fibers include regenerated cellulose fibers such as viscose rayon and cupro rayon, and solvent-spun rayon such as lyocell. Polyester fibers include polyethylene terephthalate fibers. From the viewpoint of moisture retention and resistance to stuffiness, regenerated cellulose fibers such as viscose rayon are preferred. From the viewpoint of stiffness and shear strength, acrylic fibers and natural cellulose fibers are preferred. Other fibers can be used alone or in combination of two or more. Other fibers can also be selected from polyester fibers, acrylonitrile fibers, and cellulose fibers.

[0045] In moisturizing fabrics, there are no particular limitations on regenerated collagen fibers and other fibers. However, from the viewpoint of good skin feel, a single fiber fineness of 10 dtex or less is preferred, more preferably 8 dtex or less, further preferably 5 dtex or less, and particularly preferably 3 dtex or less is preferred. Furthermore, from the viewpoint of accessibility and versatility, a single fiber fineness of 0.5 dtex or more is preferred for regenerated collagen fibers and other fibers, more preferably 0.6 dtex or more, and further preferably 0.8 dtex or more.

[0046] In moisture-retaining fabrics, regenerated collagen fibers and other fibers can be long or short fibers. When used as staple yarn, the regenerated collagen fibers and other fibers are preferably 26 mm or more and 126 mm or less in length, more preferably 35 mm or more and 76 mm or less. There is no particular limitation on the thickness of the staple yarn; for example, from the point of view of hand feel, the count of cotton yarn in English units can be 5 / 1 or more and 100 / 1 or less.

[0047] Moisturizing fabrics can be either woven or woven. Both woven and woven fabrics can be single-layered or multi-layered (two or more layers). The weave of woven fabrics is not particularly limited and can be any of the following: circular knit, weft knit, warp knit, or terry knit. Examples include plain knit, plain weave, circular rib knit (rib structure, rib weave, rib weave), double rib (double-sided knit), rib weave, double reverse weave, warp plain weave, warp pile weave, warp-knitted satin weave, chain weave, and interlining weave. The weave of woven fabrics is also not particularly limited and can be plain weave, twill weave, satin weave, or other three-dimensional weaves, or fancy fabrics made using special looms such as multi-arm looms or jacquard looms. From the viewpoints of skin feel, body fit, and breathability, woven fabrics are preferred when used for underwear.

[0048] There are no particular limitations on the moisture-retaining fabric, but from the perspective of strength and comfort when used in underwear, a weight per unit area of ​​80g / m² is preferred. 2 Above and 350g / m 2 The preferred value is 85g / m 2 Above and 330g / m 2 The preferred value is 90 g / m². 2 Above and 320g / m 2 The following is a further preferred value: 100g / m 2 Above and 315g / m 2 The following is a further preferred value: 110g / m 2 Above and 315g / m 2 The following is a further preferred value: 120g / m 2 Above and 315g / m 2 The following is a further preferred value: 140g / m 2 Above and 315g / m 2 The following is a further preferred value: 160g / m 2 Above and 315g / m 2 The following is a further preferred value: 180g / m 2 Above and 315g / m 2 The following is a further preferred value: 200g / m 2Above and 315g / m 2 The following is a further preferred value: 220g / m 2 Above and 315g / m 2 The following is a further preferred value: 240g / m 2 Above and 315g / m 2 The following is a further preferred value: 260g / m 2 Above and 315g / m 2 The following is a further preferred value: 280g / m 2 Above and 315g / m 2 the following.

[0049] (underwear)

[0050] The moisturizing fabric is suitable for use in underwear, which has good moisturizing and soft properties and is breathable. The moisturizing fabric of this invention can be used to constitute the entirety of underwear, or it can be used to constitute a part of it.

[0051] Underwear is any clothing worn in direct contact with the skin; there are no specific limitations. Examples include shirts, loungewear, women's underwear, underpants (including shorts and belly bands), loincloths, socks, gloves, and sporting goods. Moisturizing fabrics, besides underwear, can also be used for other fiber products that come into contact with the skin, such as bedding and towels.

[0052] Example

[0053] The present invention will now be described in more detail through embodiments. However, the present invention is not limited to the embodiments described below.

[0054] The measurement and evaluation methods are as follows. Furthermore, the measurements and evaluations were conducted at a temperature of 23±2℃ and a relative humidity of 65±5%.

[0055] (Skin moisture gain rate and moisture absorption rate over two hours)

[0056] (1) Cut the fabric of the test object into a certain size (3cm×6cm). In order to fix it to the skin surface, stick transparent tape ("transparent tape (registered trademark)" manufactured by NICHIBAN, 18mm×35m, CT405AP-18) on the cut fabric. Measure the weight of the fabric with tape attached, and set it as W1.

[0057] (2) The skin moisture content of the inner forearm with the attached fabric was measured using a capacitive moisture meter and denoted as Sw1.

[0058] (3) Apply the adhesive tape to the inside of the forearm with the fabric in contact with the skin.

[0059] (4) After two hours of storage, the adhesive tape fabric was recycled, its weight was measured, and its average value was set as W2. The amount of moisture absorbed in two hours was calculated using the following formula (1).

[0060] (5) Measure the moisture content of the skin surface on the inner side of the forearm after the fabric is peeled off, denoted as Sw2, and calculate the skin moisture increase rate over two hours using the following formula (2).

[0061] Set n to 7.

[0062] [Formula 1]

[0063] Moisture absorption in two hours (g / cm³) 2 )=(W2-W1)g / (3×6)cm 2

[0064] [Formula 2]

[0065] Two-hour skin moisture increase rate (%) = [(Sw2-Sw1) / Sw1]×100

[0066] (Insulation properties)

[0067] The fabric used for the test was cut to a specific size (3cm × 6cm). Transparent tape was used to secure it to the skin, and the tape-covered fabric was applied to the inside of the forearm in contact with the skin. Temperature changes were observed. Infrared thermal imaging cameras were used to capture images and measure the surface temperature of the fabric covering the skin. The surface temperature of the fabric was measured immediately after application, after one hour, and after two hours. The average of these six measurements was calculated as the skin surface temperature. The skin surface temperature immediately after application was designated T0, the temperature after one hour was designated T1, and the temperature after two hours was designated T2.

[0068] (Shear properties)

[0069] The shear stiffness was determined using a KES-FB1 (KATOLEC) specimen (20cm × 20cm) under conditions of a shear force of 2.5gf / cm, a shear strain rate of 0.00834 / s, and a shear angle of ±8°.

[0070] (Bending characteristics)

[0071] Regarding the stiffness B and bending hysteresis 2HB of the moisture-retaining fabric, a KES-FB3 (manufactured by KATOLEC) can be used. One end of the sample (effective length 20cm, width 1cm) is fixed, and the other end is moved, with a curvature K = ±2.5cm. -1 The range is within a constant speed (deformation speed 0.5cm). -1Stiffness B and bending hysteresis 2HB were measured under conditions of ( / second). Stiffness B and bending hysteresis 2HB are the average values ​​of the warp and weft directions.

[0072] In the examples and comparative examples, the following fibers were used.

[0073] (1) Regenerated collagen fiber: The fiber is made according to manufacturing example 1 below.

[0074] <Manufacturing Example 1>

[0075] Using cowhide as raw material, a 30% by weight hydrogen peroxide aqueous solution was added to alkali-soluble hide pieces, followed by dissolution with lactic acid aqueous solution to adjust the pH to 3.5 and the solid content to 7.5% by weight, to prepare a stock solution. The stock solution was then subjected to degassing treatment under reduced pressure using a stirring degassing machine (DALTON 8DMV model), and transferred to a piston-type spinning stock solution tank for further degassing under reduced pressure. After the stock solution was extruded using a piston, it was metered and pumped through a sintered filter with a 10μm pore size, and then extruded at a spinning speed of 5m / min into a 25°C coagulation bath containing 20% ​​by weight sodium sulfate (adjusted to pH 11 with boric acid and sodium hydroxide). Next, the obtained soluble regenerated collagen fibers were immersed in an aqueous solution containing 1.7 wt% epichlorohydrin, 0.0246 wt% sodium hydroxide, and 17 wt% sodium sulfate (using neutral anhydrous sodium sulfate manufactured by TOSOH) at 25°C for 4 hours. The temperature of the reaction solution was then increased to 43°C, and the fibers were immersed for another 2 hours. After the reaction, the reaction solution was removed, and the fibers were washed three times in batches with water at 25°C. Subsequently, the fibers were immersed in an aqueous solution containing 5.0 wt% aluminum sulfate (using aluminum sulfate manufactured by Nippon Light Metals Co., Ltd.), 0.9 wt% trisodium citrate (using refined sodium citrate M manufactured by Fuso Chemical Industry Co., Ltd.), and 1.2 wt% sodium hydroxide at 30°C. At 2, 3, and 4 hours after the start of the reaction, 5 wt% sodium hydroxide aqueous solution was added to the reaction solution. The fibers were then washed three times in batches with water at 25°C. The washed fibers were immersed in an oil bath containing an oil agent containing a Pluronic (registered trademark) type polyether antistatic agent, allowing the oil agent to adhere. The fibers were then dried under tension using a hot air convection dryer set to 50°C, yielding regenerated collagen fibers (tows) with a single fiber fineness of 2 dtex. The tows, which had been crimped by a gear crease, were then cut into fibers of 51 mm length using a rotary cutter, thus obtaining regenerated collagen fibers with a single fiber fineness of 2 dtex and a fiber length of 51 mm.

[0076] Acrylonitrile fibers

[0077] The single fiber fineness is 0.9 dtex, the cut length is 38 mm, and it is manufactured by Toray Industries, Inc.

[0078] <Polyester Fibers>

[0079] Polyethylene terephthalate fiber, with a single fiber fineness of 1.7 dtex and a cut length of 38 mm, manufactured by Toray Industries, Inc.

[0080] <Rayon Fiber>

[0081] Lyocell fiber, with a single fiber fineness of 0.9 dtex and a cut length of 38 mm, is "Micro Tencel" manufactured by Lenzing.

[0082] Cotton

[0083] The average fiber diameter is 4μm, and the average cutting length is approximately 30mm.

[0084] (Example 1)

[0085] Using the regenerated collagen fibers obtained according to Manufacturing Example 1, ring spinning was performed on a two-inch spinning machine to produce a staple yarn composed of 100% by weight of regenerated collagen fibers (cotton yarn English count: 10 / 1). This staple yarn was then used to construct a knitted fabric (313 g / m²) in a plain weave. 2 ).

[0086] (Examples 2-15)

[0087] Regenerated collagen fibers are blended with acrylonitrile fibers, polyester fibers, rayon fibers or cotton according to the contents shown in Tables 1 and 2 below, and the blended yarn is produced by ring spinning on a two-inch spinning machine (cotton yarn English count: 10 / 1). The blended yarn is then used to make a knitted fabric with the unit area weight shown in Tables 1 and 2 below in plain knit weave.

[0088] (Comparative Example 1)

[0089] Acrylonitrile fibers are used to produce staple yarn (cotton yarn English count: 10 / 1) composed of 100% acrylonitrile fibers through ring spinning on a two-inch spinning machine. Fabrics (319 g / m²) are then made from this staple yarn using a plain knit weave. 2 ).

[0090] (Comparative Example 2)

[0091] Using polyester fibers, ring spinning is performed on a two-inch spinning machine to produce staple yarn composed of 100% polyester fibers (cotton yarn count: 10 / 1 in English). This staple yarn is then used to make fabrics with a plain knit weave (337 g / m²). 2 ).

[0092] (Comparative Example 3)

[0093] Cotton is used, and ring spinning is performed on a two-inch spinning machine to produce a staple yarn composed of 100% cotton by weight (cotton yarn count: 10 / 1 in English). This staple yarn is then used to make a knitted fabric in plain weave (362 g / m²). 2 ).

[0094] (Comparative Example 4)

[0095] Using rayon fibers, ring spinning is performed on a two-inch spinning machine to produce a staple yarn composed of 100% rayon fibers (cotton yarn English count: 10 / 1). This staple yarn is then used to make fabrics in a plain knit weave (309 g / m²). 2 ).

[0096] (Comparative Examples 5-6)

[0097] Regenerated collagen fibers and acrylonitrile or polyester fibers are blended according to the contents shown in Table 3 below, and the blended yarn is produced by ring spinning on a two-inch spinning machine (cotton yarn English count: 10 / 1). The blended yarn is then used to make a knitted fabric with the unit area weight shown in Table 3 below in plain knit weave.

[0098] The two-hour skin moisture increase rate and two-hour moisture absorption of the fabrics (woven fabrics) of the Examples and Comparative Examples were measured as described above, and the results are shown in Tables 1 to 3 below. In addition, the shear stiffness G, stiffness B, and bending hysteresis 2HB of the fabrics (woven fabrics) of the Examples and Comparative Examples were measured as described above, and the results are shown in Tables 1 to 3 below.

[0099] Table 1

[0100]

[0101] Table 2

[0102]

[0103] Table 3

[0104]

[0105] Table 4

[0106]

[0107] As can be seen from Tables 1 and 2 above, in the embodiments, the skin moisture increase rate of the fabric after two hours is more than 0.8% and less than 1.8%, and the moisture absorption after two hours is 0.70 mg / cm³. 2In addition, it is not stuffy and has excellent moisture retention. Furthermore, it has low shear stiffness, making it a soft fabric.

[0108] On the other hand, as shown in Table 3, in Comparative Examples 1, 2, 5, and 6, the skin moisture increase rate of the fabrics exceeded 1.8% after two hours, resulting in stuffy skin, and the moisture absorption after two hours was less than 0.70 mg / cm³. 2 Furthermore, its moisturizing properties were poor. In Comparative Example 3, the fabric's two-hour skin moisture increase rate was less than 0.8%, and its two-hour moisture absorption was less than 0.70 mg / cm³. 2 It has poor moisture retention. In Comparative Example 4, the moisture absorption was less than 0.70 mg / cm³ after two hours. 2 It has poor moisturizing properties.

[0109] As shown in Table 4, when the skin was covered with the fabrics of the Examples and Comparative Examples, the surface temperature of the skin tended to rise from immediately after being covered until one hour later. On the other hand, the temperature decreased after two hours compared to one hour later. It is speculated that this is because, from immediately after being covered until one hour later, the temperature of the fabric rises due to the absorption of moisture from the skin to maintain body temperature by covering it with the fabric. However, after one hour, the temperature decreases due to increased evaporation of moisture from the fabric.

[0110] As shown in Table 4, when applied to the skin, the example containing regenerated collagen fibers exhibited a smaller difference (T1-T2) in skin surface temperature (T1) after 1 hour and (T2) after 2 hours compared to the comparative example without regenerated collagen fibers, indicating superior heat retention. This is presumably because, although the fabric containing regenerated collagen fibers with excellent moisturizing properties absorbs moisture, the evaporation of moisture from the fabric is limited, thus preventing the temperature from easily dropping and demonstrating its heat-retaining properties.

[0111] The present invention is not particularly limited, but preferably includes at least the following embodiments.

[0112] [1] A moisture-retaining fabric, characterized in that:

[0113] The moisturizing fabric contains regenerated collagen fibers.

[0114] The moisturizing fabric exhibits a skin moisture increase rate of 0.8% to 1.8% over two hours, and a moisture absorption of 0.70 mg / cm³ over two hours. 2 above.

[0115] [2] According to the moisturizing fabric described in [1] above, the stiffness B of the moisturizing fabric is 0.015 gf·cm. 2 / cm or more and 0.19gf·cm 2 The bending hysteresis 2HB is above 0.015 gf·cm / cm and below 0.45 gf·cm / cm.

[0116] [3] According to the moisturizing fabric described in [1] or [2] above, wherein the shear stiffness G of the moisturizing fabric is above 0.15gf / cm·deg and below 0.45gf / cm·deg.

[0117] [4] The moisturizing fabric according to any one of [1] to [3] above, wherein when the moisturizing fabric is applied to the skin, the difference (T1-T2) between the skin surface temperature T1 after 1 hour and the skin surface temperature T2 after 2 hours is less than 0.10°C.

[0118] [5] The moisturizing fabric according to any one of [1] to [4] above, wherein the moisturizing fabric contains 40% by weight or more and 70% by weight or less of regenerated collagen fibers.

[0119] [6] The moisturizing fabric according to any one of [1] to [5] above, wherein the moisturizing fabric further comprises at least 30% by weight and less than 60% by weight of one or more fibers selected from polyester fibers, acrylonitrile fibers and cellulose fibers.

[0120] [7] The moisturizing fabric according to any one of [1] to [6] above, wherein the unit area weight of the moisturizing fabric is 80 g / m². 2 Above and 350g / m 2 the following.

[0121] [8] The moisturizing fabric according to any one of [1] to [7] above, wherein the moisturizing fabric is a woven fabric.

[0122] [9] An underwear, characterized in that it comprises a moisturizing fabric as described in any one of [1] to [8] above.

Claims

1. A moisture-retaining fabric, characterized in that: The moisturizing fabric contains 40% to 70% regenerated collagen fibers, and further contains 30% to 60% fibers selected from polyester fibers, acrylonitrile fibers, and cellulose fibers. The moisture-retaining fabric has a unit area weight of 110g / m². 2 Above and 350g / m 2 the following, The moisturizing fabric exhibits a skin moisture increase rate of 0.8% to 1.8% over two hours, and a moisture absorption of 0.70 mg / cm³ over two hours. 2 above.

2. The moisture-retaining fabric according to claim 1, wherein, The stiffness B of the moisture-retaining fabric is 0.015 gf·cm. 2 / cm or more and 0.19gf·cm 2 The bending hysteresis 2HB is above 0.015 gf·cm / cm and below 0.45 gf·cm / cm.

3. The moisture-retaining fabric according to claim 1 or 2, wherein, The shear stiffness G of the moisture-retaining fabric is above 0.15 gf / cm·deg and below 0.45 gf / cm·deg.

4. The moisture-retaining fabric according to claim 1 or 2, wherein, When the moisturizing fabric is applied to the skin, the difference (T1-T2) between the skin surface temperature T1 after 1 hour and the skin surface temperature T2 after 2 hours is less than 0.10℃.

5. The moisture-retaining fabric according to claim 1 or 2, wherein, The moisture-retaining fabric has a unit area weight of 280g / m². 2 Above and 315g / m 2 the following.

6. The moisture-retaining fabric according to claim 1 or 2, wherein, The moisture-retaining fabric is a woven material.

7. The moisture-retaining fabric according to claim 1 or 2, wherein, The moisture-absorbing fabric has a moisture absorption of 1.8 mg / cm³ over two hours. 2 the following.

8. The moisture-retaining fabric according to claim 1 or 2, wherein, The regenerated collagen fiber has a single fiber fineness of 0.5 dtex or more and 10 dtex or less.

9. The moisture-retaining fabric according to claim 1 or 2, wherein, The moisturizing fabric contains other fibers in addition to regenerated collagen fibers, wherein the fineness of the other fibers is 0.5 dtex or more and 10 dtex or less.

10. An underwear, characterized in that: The fabric comprising any one of claims 1 to 9.

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