Moisture-regulating fabric

Abstract

To provide a humidity conditioning fabric that improves hygroscopicity to significantly improve humidity conditioning performance while achieving both waterproofness and strength, and has proper elasticity.SOLUTION: The humidity conditioning fabric having a multilayer structure including at least three layers in which a moisture-permeable film, a humidity conditioning film, and a fabric are laminated sequentially. The moisture-permeable film has a pore-free structure. The humidity conditioning film contains a moisture absorbent and has a porous structure in which 10 to 600 pores each having a pore size of 50 μm or larger are present in a cross section vertical to a surface. The pores each have a longitudinal pore size ranging from 1.0 to 4.0 with respect to a lateral pore size.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a moisture-conditioning fabric that is exposed to water vapor generated from the user's body in seating articles such as mattresses, beds, cushions, sofas, car seats, and chairs, and futons. [Background technology]

[0002] Conventionally, covering materials made of waterproof sheet materials have been used for cushioning and padding materials in bedding, clothing, vehicle interiors, and other items that are exposed to water vapor generated by the user's body. However, waterproof sheet materials have poor moisture absorption and breathability, and therefore, when used for extended periods, they can cause discomfort to the user due to humidity and lead to the development of heat rash. Furthermore, seating articles are required to be strong enough to withstand the wear and load that accompanies use over long periods of time. However, when a strong protective film is used to prioritize strength, moisture permeability is limited.

[0003] For example, mattresses are typically made with waterproof coverings to prevent bodily waste from seeping into the inner material of the product. However, prioritizing waterproofing limits breathability, which means sweat and water vapor from the skin can accumulate between the body and the bed cover, causing stuffiness and making the skin more susceptible to becoming damp. Furthermore, bedridden care recipients are unable to change positions voluntarily, which increases the risk of developing "bedsores," a condition in which parts of the skin necrotize due to constant pressure on the body. This risk increases in damp conditions.

[0004] For example, automobile seats are expected to be used for more than 10 years, and therefore must be strong enough to withstand the wear and load that accompanies use. Furthermore, it is important that they maintain their strength without being affected by ultraviolet rays or temperature changes. To withstand such environments, seat covers with strong protective membranes are often used. However, prioritizing strength limits breathability. When driving for long periods of time, drivers maintain a constant posture, which can easily cause sweat and moisture vapor from the body to accumulate between the body and the seat, resulting in stuffiness and discomfort, especially in summer or when the heater is on.

[0005] To reduce the stuffiness felt between the body and the cover material, for example, Patent Document 1 discloses a mattress equipped with a breathable, waterproof mattress covering fabric and air cells with exhaust holes and a means for ventilating air on the opposite side of the exhaust holes. This allows for the forced exhaust (ventilation) of water vapor trapped inside due to sweating, ensuring safety and hygiene. However, the need for exhaust equipment to exhaust water vapor from inside the mattress increases costs, and maintenance of the exhaust equipment requires effort and time. Furthermore, the air currents generated by ventilation make the user more susceptible to feeling cold.

[0006] Patent Document 2 discloses a synthetic leather seating material with excellent abrasion resistance. According to this material, a light-resistant, high-strength polyurethane resin layer is bonded to a substrate, and a protective layer made of a mixture of silicone-acrylic copolymer and polycarbonate-based polyurethane is laminated on top of the base material, further enhancing abrasion resistance. However, the polyurethane resin layer and the protective layer are non-porous to enhance abrasion resistance, and a polyurethane resin with extremely low hydrolysis resistance and low water vapor permeability is used to enhance weather resistance. As a result, the material has low moisture permeability, resulting in a structure that makes the user feel stuffy. Furthermore, as strength increases, hardness also increases, resulting in a stiff feel when seated.

[0007] Furthermore, Patent Document 3 discloses a moisture-conditioning cover material in which a moisture-permeable film is laminated on the surface layer that contacts the body, a moisture-conditioning film on the middle layer, and a non-moisture-permeable film on the back layer that is the filling side, in that order. The moisture-permeable film that contacts the body allows water vapor to pass through, and the moisture-conditioning film containing a moisture absorbent absorbs it, thereby reducing the feeling of stuffiness. In addition, waterproofing is achieved by making the moisture-permeable film non-porous and using a laminated structure with a non-moisture-permeable film. However, the mechanical foaming process in the manufacturing process is highly susceptible to temperature and humidity during preparation and application, as well as the passage of time, posing many challenges for consistently producing a porous structure that provides the appropriate elasticity for user comfort. Furthermore, there are significant limitations on the balance between moisture-absorbent content and foaming ability, and considering the cost-effectiveness of moisture absorbents, which are expensive, it has been difficult to achieve even greater moisture absorption. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-006956 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-214774 [Patent Document 3] Japanese Patent Application Publication No. 2017-124552 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention solves the above-mentioned problems and aims to provide a moisture-conditioning fabric that has both waterproofness and strength, significantly improves moisture-conditioning properties by improving moisture absorption, and has appropriate elasticity. [Means for solving the problem]

[0010] The present invention has been made as a result of extensive research to achieve the above object. That is, the present invention provides a moisture-conditioning fabric having a multilayer structure consisting of at least three layers in which a moisture-permeable film, a moisture-conditioning film, and a fabric are laminated in this order, wherein the moisture-permeable film has a non-porous structure, The moisture permeability of the moisture-permeable film is 2000 g / m 2 / 24hr or more, The humidity-conditioning film contains a moisture absorbent and has a porous structure in which there are 10 to 600 pores with a pore diameter of 50 μm or more in a cross section perpendicular to the surface, and the ratio of the vertical pore diameter to the horizontal pore diameter of the pores is in the range of 1.0 to 4.0. In the present invention, the longitudinal direction refers to the thickness direction of the humidity-conditioning fabric, and the transverse direction refers to the direction perpendicular to the thickness direction of the humidity-conditioning fabric.

[0011] The ratio of the pore size in the longitudinal direction to the thickness of the humidity-conditioning film is preferably 20 to 80%.

[0012] The ratio of the thickness of the moisture-conditioning film to the thickness of the moisture-permeable film is preferably 5 to 30. [Effects of the Invention]

[0013] The present invention can provide a moisture-conditioning fabric that has both waterproofness and strength, and that has significantly improved moisture-conditioning properties by improving moisture absorption, and that also has appropriate elasticity. DETAILED DESCRIPTION OF THE INVENTION

[0014] The humidity-conditioning fabric of the present invention has a multilayer structure consisting of at least three layers laminated in order: a moisture-permeable film, a humidity-conditioning film, and a fabric, in which the moisture-permeable film has a non-porous structure and the humidity-conditioning film contains a moisture absorbent. Note that, in this specification, "pores" refer to through-holes that pass through the humidity-conditioning film and / or non-through-holes.

[0015] It is essential that the moisture-conditioning fabric has a multilayer structure consisting of at least three layers, laminated in that order: a moisture-permeable film, a moisture-conditioning film, and a fabric. By placing the surface that comes into contact with the body on the moisture-permeable film side, water vapor generated by sweating and other factors from the body can pass through the moisture-permeable film and be absorbed by the moisture-conditioning film, thereby reducing the feeling of stuffiness. Furthermore, the inclusion of a fabric reduces the risk of tearing or ripping due to external stress and increases the strength of the seams at the sewn locations. Furthermore, by making the surface that comes into contact with the body the moisture-permeable film side with a non-porous structure, excellent waterproofing can be achieved, and the penetration of odors into the inner material can be suppressed.

[0016] Each component of the moisture-conditioning fabric will be described in detail below.

[0017] First, the moisture-permeable film will be described.

[0018] The moisture-permeable film is not particularly limited as long as it has a non-porous structure and is moisture-permeable. When the moisture-permeable film has a non-porous structure with moisture permeability, water droplets on the surface of the moisture-conditioning fabric do not pass through to the inner material, and only water vapor generated by perspiration can be transmitted to the underlying moisture-conditioning film.

[0019] Examples of the moisture-permeable resin substrate used to form the moisture-permeable film include moisture-permeable polyurethane resins, moisture-permeable polyamide resins, and moisture-permeable polyester resins. More specifically, moisture-permeable polyurethane resins include polyester-based, polyether-based, and polycarbonate-based polyurethane resins, as well as polyurethane resins copolymerized with amino acids, etc.; moisture-permeable polyamide resins include polyamide resins having polyether block amide copolymers, etc.; and moisture-permeable polyester resins include resins consisting of at least one selected from polyester resins having block copolymers, etc. Among these, moisture-permeable polyurethane resins are preferably used in terms of abrasion resistance, elastic recovery, flexibility, moisture permeability, etc., and polyether-based polyurethane resins are more preferably used in terms of hydrolysis resistance and flexibility.

[0020] When a film is formed using a resin substrate solution in which a moisture-permeable resin substrate is dissolved in a solvent, the solvent is not particularly limited and examples thereof include N,N-dimethylformamide (DMF), toluene (TOL), tetrahydrofuran (THF), hexane, methyl ethyl ketone, chloroform, benzene, etc. In some cases, poor solvents such as water and lower alcohols may be used. A mixture of two or more of the above solvents may also be used.

[0021] Furthermore, the moisture-permeable film may contain additives such as flame retardants, antibacterial agents, antifungal agents, antiviral agents, insect repellents, deodorizers, antistatic agents, water repellents, oil repellents, anti-tack agents, thickeners, film-forming aids, crosslinking agents, anti-yellowing agents, and pigments, as long as the additives do not impair the object of the present invention.

[0022] The thickness of the moisture-permeable film is preferably 10 to 40 μm. If it is 10 μm or more, strength aspects such as abrasion resistance can be sufficiently satisfied. Also, if it is 40 μm or less, texture, elasticity, and moisture permeability can be easily obtained.

[0023] As a method for producing a moisture-permeable film, various known methods can be employed, and examples include production methods in which a moisture-permeable resin substrate is formed into a film by a T-die method, an inflation method, a casting method, etc. Furthermore, as a method for forming a film from a resin substrate solution in which a moisture-permeable resin is dissolved in a solvent, a method in which the solution is directly applied onto a moisture-conditioning resin using a comma coating method, a die coating method, a gravure coating method, etc., or a method in which the solution is applied onto release paper or a release film and the solvent is removed to form a film alone, but there are no particular limitations as long as the method produces a moisture-permeable film with a non-porous structure.

[0024] The moisture permeability of the breathable film is 2000g / m 2 / 24hr or more is preferable. 2 If the permeability is 24 hours or more, the moisture vapor emitted from the body can be sufficiently passed through to the lower layer, reducing the feeling of stuffiness. On the other hand, the permeability of a breathable film is 5000 g / m 2 / 24hr is preferably less than 5000g / m 2 If the moisture absorption rate is less than 24 hours, sufficient moisture absorption is obtained, improving the comfort of the user.

[0025] It is also preferable that the water swelling rate of the moisture-permeable film is 5% or less. If it is 5% or less, the film will be less likely to float or deform when wiped with water, disinfected, or cleaned using alcohol or detergents for the purpose of removing sebum stains, etc., and shape stability will be improved.

[0026] Next, the humidity-conditioning film will be described.

[0027] The humidity-conditioning film used in the present invention is a porous film containing a moisture-absorbing agent. It is essential that the humidity-conditioning film has a plurality of pores on the surface facing the moisture-permeable film and inside the structure. This allows a portion of the moisture-absorbing agent to be exposed on the surface of the pores inside the structure, and when water vapor that has passed through the moisture-permeable film is taken into the humidity-conditioning film through the pores on the surface, it comes into contact with the moisture-absorbing agent present throughout the humidity-conditioning film, thereby exhibiting excellent moisture absorption.

[0028] The humidity-conditioning film has 10 to 600 pores with a diameter of 50 μm or more, preferably 30 to 500. If there are 10 or more pores, the number of pores present in the structure is sufficient, improving moisture absorption and moisture permeability. Furthermore, if there are 600 or fewer pores, the network structure formed within the film is strong, allowing elasticity to be maintained against stress from the surface. The number of pores is measured by counting the number of pores with a diameter of 50 μm or more formed within a 1 mm horizontal dimension. Measurements are taken at 10 random locations and the average value is calculated. The network structure refers to a porous structure similar to a honeycomb structure, in which the through-holes and voids that penetrate the film are partially connected.

[0029] The diameter of the pores present in the humidity-conditioning film is set so that the ratio of the vertical pore diameter to the horizontal pore diameter is in the range of 1.0 to 4.0. The ratio of the vertical pore diameter to the horizontal pore diameter is preferably in the range of 1.5 to 3.0. When the ratio of the vertical pore diameter to the horizontal pore diameter is 1.0 or more, the surface area of ​​the pores can be made sufficient, resulting in excellent moisture absorption. Furthermore, when the ratio of the vertical pore diameter to the horizontal pore diameter is 4.0 or less, the network structure formed within the film becomes strong, resulting in sufficient elasticity.

[0030] The ratio of the longitudinal pore size to the thickness of the humidity-conditioning film is preferably set to 20 to 80%, more preferably 25 to 75%, and even more preferably 30 to 70%. If the ratio of the longitudinal pore size is 20% or more, the pore volume relative to the structure can be made sufficient, which tends to improve moisture absorption and moisture permeability. Furthermore, if the ratio is 80% or less, waterproofing can be maintained, and the network structure formed within the film becomes strong, making it easy to obtain sufficient elasticity.

[0031] The ratio of the thickness of the moisture-conditioning film to the thickness of the moisture-permeable film is preferably in the range of 5 to 30, i.e., the ratio of the thickness of the moisture-permeable film to the thickness of the moisture-conditioning film is preferably in the range of 1:5 to 1:30. Within this range, the moisture-absorbing agent can be sufficiently dispersed, thereby maintaining a suitable texture and elasticity while fully satisfying moisture absorption. Furthermore, when a functionalizing agent is added to the moisture-conditioning film, the agent can be easily dispersed, making it easy to obtain functionality. For example, when a flame retardant is added, the flame retardant can be easily dispersed, making it easy to maintain flame retardancy.

[0032] Examples of the humidity-conditioning resin substrate used to form the humidity-conditioning film include polyurethane resin, polyamide resin, polyester resin, polyethylene resin, polypropylene resin, and polyacrylic resin, with polyurethane resin being preferred because of its excellent elasticity and stretchability.

[0033] The moisture absorbent is not particularly limited, and examples thereof include organic materials such as acrylonitrile copolymer fine particles, inorganic materials such as smectite, zeolite, silica gel, mesoporous silica, and other silicon-containing silicas, and metal salts such as sodium sulfate, sodium hydroxide, magnesium oxide, magnesium sulfate, aluminum oxide, calcium oxide, calcium sulfate, and calcium chloride, and these may be used alone or in combination of two or more. Among these, silicon-containing moisture absorbents are preferred from the viewpoint of chemical stability against other components, and silica gel is more preferably used from the viewpoints of moisture absorption, dispersibility, and cost.

[0034] The moisture absorbent contained in the humidity-regulating film is 10 to 100 g / m 2 It is preferable that the range is 10 g / m 2 If the density is 100 g / m or more, the moisture absorbent can be easily exposed to the pore surface inside the structure, improving the moisture conditioning property. 2 If it is equal to or less than this, sufficient strength can be obtained and wear resistance can be improved.

[0035] The particle size of the moisture absorbent is preferably 0.5 to 30 μm. If it is 0.5 μm or more, it can be exposed on the resin surface, improving moisture absorption. If it is 30 μm or less, the network structure formed within the film becomes strong, making it easier to obtain sufficient elasticity.

[0036] It is preferable that the moisture absorbent is uniformly dispersed within the humidity-conditioning film. By uniformly dispersing the moisture absorbent in the humidity-conditioning film having a porous structure, the pore area of ​​the moisture absorbent exposed to the space can be made large, which makes it easier to improve moisture absorption.

[0037] The thickness of the humidity-conditioning film is preferably 100 to 1000 μm. If it is 100 μm or more, strength aspects such as abrasion resistance and elasticity can be fully satisfied. Also, if it is 1000 μm or less, the texture is less likely to be impaired.

[0038] Examples of methods for producing humidity-conditioning films include a method in which a substrate kneaded with a moisture absorbent and a synthetic resin is mechanically foamed to form a film having multiple open cells that communicate with each other; a method in which a W / O emulsion in which an aqueous phase component is dispersed in a continuous oil phase component is formed into a film; and a method in which a resin substrate solution in which a moisture-conditioning resin substrate is dissolved in a solvent is formed into a film by a wet method. Alternatively, a substrate kneaded with a moisture absorbent and a synthetic resin may be formed into a film by a T-die method, an inflation method, a casting method, or the like, and then holes may be formed by punching or the like. Furthermore, a foaming agent may be added during kneading, and holes may be formed by a heating process. Among these, a wet film formation method is preferred from the viewpoints of the dispersibility and moisture absorption of the moisture absorbent.

[0039] When a film is formed using a resin substrate solution in which a humidity-controlling resin substrate is dissolved in a solvent, the solvent is not particularly limited and examples thereof include N,N-dimethylformamide (DMF), toluene (TOL), tetrahydrofuran (THF), hexane, methyl ethyl ketone, chloroform, benzene, etc. In some cases, poor solvents such as water and lower alcohols may be used. A mixture of two or more of the above solvents may also be used.

[0040] When forming a humidity-conditioning film by a film-forming method using a wet method, the substrate is not particularly limited, but synthetic resin is preferably used.Synthetic resins include polyurethane resin, polyester resin, polyethylene resin, polypropylene resin, polyacrylic resin, aromatic polyamide, etc., but polyurethane resin is preferably used from the viewpoint of texture, moisture absorption, and moisture permeability, and more specifically, polyester-based, polyether-based, and polycarbonate-based polyurethane resins are exemplified.Among them, polycarbonate-based polyurethane resin is more preferably used from the viewpoint of hydrolysis property, film strength, and oil resistance.

[0041] Furthermore, the humidity-conditioning film may contain additives such as flame retardants, antibacterial agents, antifungal agents, insect repellents, deodorizers, conductive agents, antistatic agents, water repellents, oil repellents, thickeners, foaming agents, foam stabilizers, film-forming aids, crosslinking agents, plasticizers, anti-yellowing agents, and pigments, provided that the purpose of the present invention is not impaired.

[0042] The flame retardant is not particularly limited and may include metal hydroxides such as aluminum hydroxide and magnesium hydroxide, halogen-based compounds containing chlorine or bromine, antimony-based compounds containing antimony trioxide or antimony pentoxide, phosphorus-based compounds containing phosphate esters or phosphonate esters, and nitrogen-based compounds containing melamine cyanurate or ammonium phosphate, which may be used alone or in combination of two or more. Among these, halogen-based compounds, phosphorus-based compounds, and nitrogen-based compounds are preferred because of their stability and high flame retardancy relative to the amount added.

[0043] Next, the fabric will be described.

[0044] The fabric is not particularly limited, and examples thereof include knitted fabrics, woven fabrics, nonwoven fabrics, etc. In the case of knitted fabrics, for example, tricot, double raschel, circular knit, jersey knit, rib knit, smooth knit, and jacquard are exemplified, in the case of woven fabrics, for example, plain weave, twill weave, and satin weave are exemplified, and in the case of nonwoven fabrics, for example, spunbonded nonwoven fabrics, needle-punched nonwoven fabrics, and spunlace nonwoven fabrics are exemplified. Among these, knitted fabrics are preferred in terms of stretchability, and smooth knitted fabrics are more preferred in terms of appropriate conformability and texture during product use.

[0045] The fabric may be imparted with functionality such as antibacterial properties, antifungal properties, insect repellent properties, deodorizing properties, antistatic properties, water absorbency, water repellency, oil repellency, stain resistance, flexibility, and yellowing prevention, as long as the purpose of the present invention is not impaired, and may be subjected to processing such as pH adjustment and hardening processing.

[0046] The method for laminating the moisture-permeable film, the moisture-conditioning film, and the fabric can be any of various known methods, and is not particularly limited. Examples include lamination methods using an adhesive, such as dry lamination, wet lamination, and hot-melt lamination, thermal lamination, and die coating. Among these, lamination methods using an adhesive are preferably used in consideration of productivity.

[0047] When an adhesive is used in the lamination method, the adhesive is not particularly limited. Examples of the adhesive include polyurethane resin, polyester resin, nylon resin, polyacrylic resin, and epoxy resin, and among these, polyurethane resin having elasticity is preferred.

[0048] Furthermore, as long as the object of the present invention is not impaired, a coating layer, a film layer, a resin adhesive layer, a laminate of a fabric similar to or different from the fabric, etc. may be present between the moisture-permeable film and the moisture-conditioning film, and between the moisture-conditioning film and the fabric. Furthermore, this layer may have functionality such as flame retardancy, antibacterial properties, antifungal properties, conductivity, antistatic properties, high strength, flexibility, moisture permeability, low moisture permeability, impermeability, waterproofness, etc., and may be laminated in two or more layers, but the functionality and the number of layers are not particularly limited.

[0049] Other properties required for the moisture-conditioning fabric of the present invention include moisture absorption, moisture permeability, flame retardancy, waterproofness, etc., and it is preferable to optimize these properties. The moisture absorption capacity of the moisture-regulating fabric is 3.0 g / m 2 It is preferable that the density is 3.0 g / m or more. 2 If the thickness is more than this, excellent moisture absorption properties can be obtained, improving the comfort of the user. The moisture permeability of the moisture-regulating fabric is 3000g / m 2 / 24hr is preferably less than 3000g / m 2 If the moisture content is less than 24 hours, excellent moisture absorption properties are obtained, improving the comfort of the user. The flame retardancy of the moisture-conditioning fabric is preferably such that the burning length after a flame approaches or contacts it for 30 seconds and then extinguishes is 10 cm or less. If the burning length is 10 cm or less, the risk of fire spreading can be reduced if the fabric comes into contact with the burning part of a cigarette or the like during use as a product. The moisture-conditioning fabric preferably has a water pressure resistance of 20 kPa or more, preferably 20 kPa or more, and more preferably 100 kPa or more. A water pressure of 20 kPa or more can prevent water from seeping in during cleaning work with water or disinfectant, and can also prevent moisture on the surface from reaching the filling due to body pressure. [Example]

[0050] The present invention will be described below with reference to examples, but the present invention is not necessarily limited to these examples. The properties of the moisture-permeable films, moisture-conditioning films, fabrics, and laminated samples of Examples 1 to 9 and Comparative Examples 1 to 4 were measured by the following methods. Performance evaluations were also carried out by the following methods. The results are shown in Table 1.

[0051] <Measurement and evaluation methods> (1) Thickness At any five points, cross sections of the obtained laminated sample perpendicular to the surface of the moisture-permeable film and the moisture-conditioning film were observed under a microscope at 100x magnification, and the thickness (μm) was measured and the average value was calculated.

[0052] (2) Water swelling rate The moisture-permeable film was cut into 5 cm x 5 cm pieces at any five points, placed on a smooth glass plate, and the entire film was covered with water. After immersion for 30 minutes, the lengths of the four sides (cm) and the diagonal length were measured, and the average length of each of the five points was calculated. The water swelling ratio was calculated using the following formula. Water swelling rate (%) = ((length after immersion - length before immersion) / length before immersion) x 100

[0053] (3) Moisture permeability At any five points, the moisture permeability (g / m) of the moisture permeable film and the obtained laminated sample was measured according to JIS L1099 A-1 method (calcium chloride method). 2 24 hours) and calculated the average value.

[0054] (4) Number of holes At 10 random locations, the cross section of the obtained laminated sample perpendicular to the surface of the humidity-conditioning film was observed under a microscope at 100x magnification, and the number of pores with a diameter of 50 μm or more formed within 1 mm in the horizontal direction was counted and the average value was calculated.

[0055] (5) Pore diameter Among the pores with a diameter of 50 μm or more measured in the test (4), one was randomly selected from each measurement point, and the maximum pore diameter (μm) in the horizontal direction and the maximum pore diameter in the vertical direction were measured. The average values ​​of the maximum pore diameters at 10 points were calculated as the pore diameters in the horizontal and vertical directions. Then, the ratio of the pore diameter in the vertical direction to the pore diameter in the horizontal direction was calculated using the following formula. Vertical pore size to horizontal pore size = Vertical pore size / Horizontal pore size

[0056] (6) Ratio of vertical pore diameter to humidity-conditioning film thickness Using the longitudinal pore diameter determined in the test (5), the ratio of the longitudinal pore diameter to the thickness of the humidity-conditioning film was calculated using the following formula. Percentage of vertical pore size to humidity-conditioning film thickness (%) = (vertical pore size / humidity-conditioning film thickness) x 100

[0057] (7) Particle size of the moisture absorbent Measurements were carried out using a laser diffraction particle size distribution analyzer (SALD (registered trademark)-200V, manufactured by Shimadzu Corporation) using water as a dispersion medium, and the volume average particle size was determined from the particle size distribution expressed on a volume basis.

[0058] (8) Moisture absorption The laminated sample obtained was cut into 10cm x 10cm pieces at five random locations and placed in a weighing bottle. The weight was measured after 2 hours in a thermo-hygrostat at 20°C and 40% humidity, and the average weight was calculated. The weight was then measured again after 2 hours in a thermo-hygrostat at 20°C and 90% humidity, and the average weight was calculated. The moisture absorption amount was calculated using the following formula. Moisture absorption (g / m 2 ) = (weight after 90% humidity conditioning - weight after 40% humidity conditioning) x 100

[0059] (9) Flame retardancy The burn length (cm) of the obtained laminated sample was measured at any five points based on the method using methenamine tablets in JIS L1091 8.2 Method B (surface combustion test) (Annex 9 Surface flammability test method - 45° methenamine tablet method), and the average value was calculated.

[0060] (10) Waterproof The water pressure resistance (kPa) of the obtained laminated sample was measured from the moisture-permeable film side at any five points according to JIS L1092 7.1.2 Method B (high water pressure method), and the average value was calculated.

[0061] (11) Abrasion resistance The moisture-permeable film side of the laminated sample obtained was rubbed 500 times under a load of 500 g at five randomly selected points according to JIS L1096 8.19.3 C method (Taber method), and the surface condition was then observed. ○: No change in appearance such as tearing or peeling. △: Small tears or peeling occurred, but in less than 5 places. ×: Tears or peeling occurred in 5 or more places.

[0062] (12) Elasticity 200g / 25cm at any 5 points 2 A load of 1000 kJ / cm was applied to the obtained laminated sample for 24 hours, and the surface condition was observed when the load was removed. ○: No change in appearance such as dents. △: Some denting is observed, but the dent is restored within 12 hours after the load is removed. ×: Dents were observed and did not recover even after 12 hours.

[0063] [Example 1] First, the following moisture-permeable resin substrate solution was applied to a release paper using a comma coater, and after drying at 100°C, a moisture-permeable film with a thickness of 20 µm and a water swelling rate of 1% was formed. (Moisture-permeable resin substrate solution) Ether-based polyurethane resin (DIC CRISBON S-125) 100 parts Pigment (titanium dioxide) 20 parts DMF / TOL(1:1) 40 copies

[0064] Next, the following humidity-regulating resin substrate solution was applied to a polyester release film using a comma coater, immersed in water for 10 minutes, and then dried at 120°C to form a humidity-regulating film with a thickness of approximately 210 μm. (humidity-controlling resin base solution) Polycarbonate-based polyurethane resin (DIC CRISBON MP-120) 100 parts Moisture absorbent (particle size 20 μm, silica gel) 10 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts DMF 30 parts

[0065] Next, adhesive solution A, which had been heated to 200° C. and dissolved, was applied onto the moisture-conditioning film using a gravure roll, and the film was then laminated to a moisture-permeable film using a hot-melt lamination method. (Adhesive liquid A) 100 parts thermoplastic polyurethane resin (DIC Tyforce FH-100)

[0066] Next, adhesive liquid B was applied using a comma coat to the surface opposite to the surface where the moisture-regulating film and moisture-permeable film were bonded, dried at 120°C, and then bonded to a knitted fabric (polyester, structure: smooth knit) using the dry lamination method. (Adhesive liquid B) 100 parts polyurethane adhesive resin (Dainichi Seika Color & Chemicals Mfg. Co., Ltd., Heimullen Y-119E) Crosslinking agent (UD-crosslinking agent manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd.) 5 parts Crosslinking accelerator (UD-120 accelerator manufactured by Dainichiseika Color & Chemicals Mfg. Co., Ltd.) 1 part 50 copies of DMF

[0067] [Example 2] The same procedure as in Example 1 was repeated, except that the formulation of the moisture-permeable resin substrate solution was changed as follows to make the water swelling rate of the moisture-permeable film 5%, and the fabric was changed to a woven fabric (polyester, structure: plain weave). (Moisture-permeable resin substrate solution) 100 parts water-absorbent polyurethane resin (Dainichi Seika Color & Chemicals Mfg. Co., Ltd., Heimullen Y-208-1) Pigment (titanium dioxide) 20 parts DMF / TOL(1:1) 40 copies

[0068] [Example 3] The same procedure as in Example 1 was repeated except that the formulation of the humidity-conditioning resin base material solution was changed as follows, the thickness was set to about 100 μm, and the immersion time in water was increased by 0.5 times. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 20 μm, silica gel) 5 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts 1 part film-forming agent (Dainichiseika Color & Chemicals Co., Ltd. CUT-30) DMF 30 parts

[0069] [Example 4] The same procedure as in Example 1 was followed, except that the thickness of the moisture-permeable film was 30 μm, the formulation of the humidity-regulating resin substrate solution was changed as follows, the thickness was made approximately 900 μm, and the water immersion time was doubled. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 20 μm, silica gel) 3.5 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts 1 part film-forming agent (Dainichiseika Color & Chemicals Co., Ltd. CUT-30) 20 copies of DMF

[0070] [Example 5] The same procedure as in Example 1 was followed, except that the thickness of the moisture-permeable film was 18 μm, the formulation of the humidity-regulating resin substrate solution was changed as follows, the thickness was set to approximately 500 μm, and the water immersion time was increased by 1.5 times. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 5 μm, silica gel) 8 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts DMF 30 parts

[0071] [Example 6] The same procedure as in Example 1 was repeated except that the formulation of the humidity-conditioning resin base solution was changed as follows, and the thickness was changed to about 180 μm. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 0.7 μm, silica gel) 20 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts 1 part film-forming agent (Dainichiseika Color & Chemicals Co., Ltd. CUT-30) 1 part film-forming agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd. CUT-180) DMF 40 parts

[0072] [Example 7] The same procedure as in Example 1 was carried out except that the formulation of the humidity-conditioning resin base solution was changed as follows. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 30 μm, silica gel) 7 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts 1 part film-forming agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd. CUT-180) DMF 30 parts

[0073] [Example 8] The same procedure as in Example 1 was followed, except that the thickness of the moisture-permeable film was 15 μm, the formulation of the humidity-conditioning resin substrate solution was changed as follows, the thickness was approximately 350 μm, the water immersion time was increased by 1.2 times, and the fabric was changed to a nonwoven fabric (polyester, spunbond nonwoven fabric). (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 20 μm, silica gel) 10 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts 3 parts of film-forming agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd. CUT-180) DMF 30 parts

[0074] [Example 9] The same procedure as in Example 1 was carried out except that the formulation of the humidity-conditioning resin base solution was changed as follows. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 20 μm, silica gel) 45 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts DMF 70 copies

[0075] [Comparative Example 1] First, the following moisture-impermeable resin substrate solution was applied to a release paper using a comma coater, and after drying at 100°C, a moisture-impermeable film with a thickness of 20 µm and a water swelling rate of 0.5% was formed. (non-moisture permeable resin base solution) 100 parts moisture-proof polyurethane resin (DIC CRISBON S-705) Pigment (titanium dioxide) 20 parts DMF / TOL(1:1) 40 copies

[0076] Next, a humidity-conditioning film was formed in the same manner as in Example 1, and the moisture-impermeable film, humidity-conditioning film, and fabric were each laminated in the same manner as in Example 1.

[0077] Comparative Example 2 First, the following moisture-permeable resin substrate solution containing a moisture absorbent was applied to a release paper using a comma coater, and after drying at 100°C, a moisture-permeable film with a thickness of 30 μm and a water swelling rate of 1% was formed. (Moisture-permeable resin substrate solution) 100 parts ether-based polyurethane resin (DIC CRISBON S-125) Pigment (titanium dioxide) 10 parts Moisture absorbent (particle size 20 μm, silica gel) 20 parts DMF / TOL(1:1) 40 copies

[0078] Next, the following resin substrate solution was applied to a polyester release film using a comma coater, immersed in water for 10 minutes, and then dried at 120°C to form a film with a thickness of approximately 210 μm. (Resin substrate solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts DMF 25 parts

[0079] Next, this film, a moisture-permeable film, and a fabric were each bonded together in the same manner as in Example 1, except that the fabric was the same woven fabric as in Example 2.

[0080] Comparative Example 3 The same procedure as in Example 1 was repeated except that the formulation of the humidity-regulating resin substrate solution was changed as follows, the thickness was set to approximately 150 μm, the water immersion time was increased to 0.8 times, and the fabric was changed to the same nonwoven fabric as in Example 8. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 20 μm, silica gel) 10 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts Film-forming agent (Dainichiseika Color & Chemicals Co., Ltd. CUT-30) 5 parts DMF 30 parts

[0081] Comparative Example 4 The same procedure as in Example 1 was repeated except that the formulation of the humidity-conditioning resin base solution was changed as follows, the thickness was set to about 700 μm, and the immersion time in water was increased by 1.8 times. (humidity-controlling resin base solution) 100 parts polycarbonate polyurethane resin (DIC CRISBON MP-120) Moisture absorbent (particle size 10 μm, silica gel) 5.5 parts Flame retardant (phosphate ester compound) 10 parts Stabilizer (Dainichiseika Color & Chemicals HH-1728) 5 parts Film-forming agent (Dainichiseika Color & Chemicals Mfg. Co., Ltd. CUT-180) 5 parts DMF 30 parts

[0082] [Table 1]

[0083] As is clear from Table 1, the moisture-conditioning fabrics obtained in each example were excellent in waterproofness, moisture absorption, and abrasion resistance, and had appropriate elasticity.

Claims

1. A moisture-conditioning fabric having a multilayer structure consisting of at least three layers in which a moisture-permeable film, a moisture-conditioning film, and a fabric are laminated in this order, The moisture-permeable film has a non-porous structure, The moisture permeability of the moisture-permeable film is 2000 g / m 2 / 24 hr or more, The humidity-conditioning fabric comprises a moisture-absorbing agent, and has a porous structure in which 10 to 600 pores having a pore diameter of 50 μm or more are present in a cross section perpendicular to the surface, and the ratio of the vertical pore diameter to the horizontal pore diameter of the pores is in the range of 1.0 to 4.

0.

2. 2. The humidity-conditioning fabric according to claim 1, wherein the ratio of the longitudinal pore size to the thickness of the humidity-conditioning film is 20 to 80%.

3. 3. The moisture-conditioning fabric according to claim 1, wherein the thickness of the moisture-conditioning film relative to the thickness of the moisture-permeable film is 5 to 30 mm.

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