Humidification laminate and humidifier

Abstract

To provide a laminate for humidification which improves moisture permeability performance, and enables miniaturization of a humidifier.SOLUTION: A laminate 1 for humidification has a porous reinforcement material 11, and a non-porous film 12 stacked on at least one surface 11a of the porous reinforcement material 11, wherein moisture permeability of the laminate 1 for humidification is equal to or more than moisture permeability of the single porous reinforcement material 11. The non-porous film 12 preferably has properties such that the thicker the film thickness, the higher the moisture. The adsorption isotherm of the porous reinforcement material 11 is preferably any one of I to VI types represented by IUPAC.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a humidifier laminate and a humidifier. [Background technology]

[0002] A known type of humidifier is a moisture-permeable membrane type that can provide both ventilation and humidification. However, while this type of moisture-permeable membrane type humidifier has better humidification performance than a natural evaporation type humidifier, which supplies water to the surface of an evaporation plate to humidify the air, it has the problem of being expensive.

[0003] In order to reduce costs, efforts are being made to reduce the number of components and the size of the device. For example, moisture-permeable membrane humidifiers with an uneven membrane surface to increase the surface area of ​​the moisture-permeable membrane, such as that described in Patent Document 1, have been considered. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-174008 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the invention described in Patent Document 1, the thickness of the moisture-permeable membrane needs to be increased in accordance with the size of the component used to give the moisture-permeable membrane an uneven shape, so there is a limit to how small the humidifier can be reduced in size, and cost reductions remain insufficient.

[0006] Furthermore, the thickness of the moisture-permeable film must be made thicker than necessary in order to match the uneven shape, which causes moisture resistance and reduces the moisture permeability itself.

[0007] Therefore, an object of the present disclosure is to provide a humidifier laminate that improves moisture permeability and enables the humidifier to be made smaller. [Means for solving the problem]

[0008] As a result of intensive research by the inventors of the present disclosure to achieve the above object, it has been found that a laminate for humidification having a porous reinforcing material and a non-porous membrane that is laminated on at least one surface of the porous reinforcing material and functions as a moisture permeable membrane, and the moisture permeability of the laminate is equal to or higher than that of the porous reinforcing material alone, can improve the moisture permeability performance and enable the miniaturization of a humidifier. The present disclosure relates to a laminate completed based on these findings.

[0009] In other words, the present disclosure provides a laminate for humidification, which has a porous reinforcing material and a non-porous membrane that is laminated on at least one side of the porous reinforcing material and functions as a moisture permeable membrane, and the moisture permeability of the laminate is equal to or greater than the moisture permeability of the porous reinforcing material alone.

[0010] By using a non-porous membrane that has a moisture permeability equal to or greater than that of the porous reinforcing material alone for the humidifying laminate, it is possible to achieve sufficient moisture permeability without providing the humidifying laminate with an uneven shape, making it possible to reduce the size of the humidifier.

[0011] It is preferable that the non-porous membrane has a property that the moisture permeability increases as the membrane becomes thicker. By using such a non-porous membrane, the humidifying laminate can more easily exhibit its moisture permeability.

[0012] The adsorption isotherm of the porous reinforcing material is preferably any one of types I to VI indicated by IUPAC.

[0013] The adsorption isotherm of the porous reinforcing material is preferably Type III as defined by IUPAC.

[0014] The adsorption isotherm of the non-porous membrane is preferably any one of types I to VI indicated by IUPAC.

[0015] The adsorption isotherm of the nonporous membrane is preferably type III as indicated by IUPAC.

[0016] In addition, the nonporous membrane preferably has a moisture content 10 times or more that of the porous reinforcing material at a relative humidity of 100%. When the moisture content of the nonporous membrane is 10 times or more than that of the porous reinforcing material at a relative humidity of 100%, the humidifying laminate can easily exhibit moisture permeability.

[0017] It is also preferable that the non-porous membrane is disposed on the liquid water side of the porous reinforcing material and is used to absorb the liquid water and release it into the air.

[0018] The cationic portion preferably contains a group containing an ammonium ion or a group capable of forming an ammonium ion. By containing a group containing an ammonium ion or a group capable of forming an ammonium ion, the nonporous membrane can exert a bactericidal effect, thereby suppressing the adhesion and accumulation of germs and the like.

[0019] The thermoplastic resin has a hydrophilic portion, and the hydrophilic portion preferably contains a structural unit represented by the following formula (1): When the non-porous membrane has a hydrophilic portion of the structural unit, a water-conducting path can be formed in the non-porous membrane, and moisture permeability can be easily exhibited. [ka] (R 1 ,R 2 each independently represents a hydrogen atom or a methyl group.

[0020] The thermoplastic resin preferably has a hydrophobic portion, and the hydrophobic portion preferably contains a structural unit represented by the following formula (2) and / or the following formula (3). When the nonporous membrane has a hydrophobic portion of the structural unit, a water-conducting path can be formed in the nonporous membrane, making it easier to exhibit moisture permeability. [ka] (R 1 represents a hydrogen atom or a methyl group, and R 3 represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms. [ka] (R 1 represents a hydrogen atom or a methyl group, and R 4 represents a branched alkyl group having 3 or more carbon atoms.

[0021] In the humidification laminate, the non-porous membrane is preferably coated so as to cover at least one surface of the porous reinforcing material.

[0022] The present disclosure also provides a humidifier in which a plurality of bag-shaped water-retaining containers are installed, each of which is formed by bonding the above-mentioned humidification laminate to a frame.

[0023] The present disclosure also provides an air conditioner equipped with the above-mentioned humidifier.

[0024] The present disclosure also provides a ventilation device incorporating the above-mentioned humidifier.

[0025] The present disclosure also provides an air purifier equipped with the above humidifier. Effect of the Invention

[0026] The humidifier laminate of the present disclosure can improve moisture permeability and enable the humidifier to be made smaller. For this reason, the humidifier laminate of the present disclosure is preferably used in moisture-permeable membrane-type humidifiers. [Brief description of the drawings]

[0027] [Figure 1] 1 is a schematic cross-sectional view showing one embodiment of a humidification laminate according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] [Humidification laminate] The humidification laminate according to one embodiment of the present disclosure includes at least a porous reinforcing material and a non-porous membrane provided on at least one surface of the porous reinforcing material. The non-porous membrane may be provided on one surface of the porous reinforcing material, or on both surfaces. The humidification laminate may also have a structure in which the non-porous membrane is sandwiched between two of the porous reinforcing materials. That is, the porous reinforcing material may be provided on both surfaces of the non-porous membrane. In this case, the two porous reinforcing materials may be the same porous reinforcing material, or may be porous reinforcing materials having different materials, thicknesses, etc.

[0029] 1 is a schematic cross-sectional view showing one embodiment of a humidification laminate according to the present disclosure. The humidification laminate 1 includes a porous reinforcing material 11 and a non-porous membrane 12 provided on one surface 11a of the porous reinforcing material 11.

[0030] <Non-porous membrane> The non-porous membrane functions as a moisture-permeable membrane. The humidifying laminate having the non-porous membrane on at least one surface of the porous reinforcing material has moisture permeability equal to or higher than that of the porous reinforcing material alone. This is presumably due to the non-porous membrane having high water retention. Such a non-porous membrane does not need to be provided with an uneven shape to increase the surface area, and the structure of the humidifying laminate can be made compact. The moisture permeability is measured based on the moisture permeability test method (cup method) of JIS Z0208-1976, which is performed under the conditions of a temperature of 20°C, a relative humidity of 30%, and a wind speed of 2.4 m / s, and a temperature of 20°C, a relative humidity of 65%, and a wind speed of 0.1 m / s, by placing a moisture permeable cup containing 40 g of water in a constant temperature and humidity chamber, and measuring the reduction in the total mass of the water and the moisture permeable cup after 1 hour, measured per 1 m of the test piece. 2 Convert to mass per 24 hours and calculate as moisture permeability.

[0031] Furthermore, it is preferable that the non-porous membrane has a property of exhibiting higher moisture permeability as the membrane becomes thicker. In a normal moisture-permeable membrane, moisture resistance occurs as the membrane becomes thicker, and moisture permeability decreases. However, the non-porous membrane has high water retention, so moisture resistance is not caused, and it is presumed that the membrane can exhibit high moisture permeability even if the membrane becomes thick.

[0032] The thickness of the non-porous membrane is preferably 0.5 μm to 5 μm, more preferably 1 μm to 4 μm. When the thickness is 0.5 μm or more, the membrane formability is good, and the gas barrier property and moisture permeability can be further improved. When the thickness is 5 μm or less, thin film formation is easy, and the humidifier can be made smaller while maintaining sufficient moisture permeability, which is also economical.

[0033] The adsorption isotherm of the non-porous membrane is preferably any one of IUPAC types I to VI, more preferably type III. When the adsorption isotherm of the non-porous membrane is any one of IUPAC types I to VI, the water retention capacity of the non-porous membrane tends to increase, so that the humidifying laminate can easily exhibit moisture permeability.

[0034] The moisture content of the nonporous membrane at a relative humidity of 100% is preferably 2% or more, more preferably 2.5% or more, and particularly preferably 3% or more. When the moisture content of the nonporous membrane at a relative humidity of 100% is 2% or more, the humidifying laminate can easily exhibit moisture permeability.

[0035] Furthermore, the nonporous membrane preferably has a moisture content 10 times or more, more preferably 15 times or more, that of the porous reinforcing material at a relative humidity of 100%. When the moisture content of the nonporous membrane at a relative humidity of 100% is 10 times or more than that of the porous reinforcing material, the humidifying laminate can easily exhibit moisture permeability.

[0036] Moreover, the non-porous membrane preferably contains a thermoplastic resin, and the thermoplastic resin preferably has a cationic moiety. Therefore, the non-porous membrane preferably has the cationic moiety. By having the cationic moiety, the non-porous membrane can exert a repulsive force against scale components, which are usually mainly made of metal ions and often have a positive charge, and can suppress adhesion and deposition of scale components on the non-porous membrane.

[0037] In order to absorb moisture into the non-porous membrane, it is preferable that the thermoplastic resin has a hydrophilic portion. In addition, in order to form a water-conducting path in the non-porous membrane, it is preferable that the thermoplastic resin has a hydrophobic portion. Therefore, it is preferable that the thermoplastic resin has both a hydrophilic portion and a hydrophobic portion. In the non-porous membrane, the hydrophilic portion functions as a water-conducting path by forming a structure in which the hydrophilic portion and the hydrophobic portion are phase-separated, and it is possible to transmit more water vapor, so that it is presumed that the moisture permeability is superior.

[0038] Examples of the thermoplastic resin include acrylic resins, cellulose resins, and polyester resins such as polybutylene terephthalate, polyether resins, polyurethane resins, polyvinyl chloride resins, polyethylene, polystyrene resins, polyamide resins, polyacetal resins, polycarbonate resins, polyphenylene sulfide resins, polyether ether ketone, polyimide resins, polytetrafluoroethylene resins, polycaprolactone, and polylactic acid.

[0039] Since the thermoplastic resin preferably has a hydrophilic portion, a hydrophobic portion, and a cationic portion as described above, it is preferably a thermoplastic copolymer containing different monomer components.

[0040] The hydrophilic portion is preferably composed of a monomer (a) (hereinafter, referred to as monomer (a)) unit containing a hydrophilic functional group in the side chain among the constituent units of the copolymer. The hydrophobic portion is preferably composed of a monomer (b) (hereinafter, referred to as monomer (b)) unit containing a hydrophobic functional group in the side chain. The hydrophilic portion and the hydrophobic portion are preferably formed in the copolymer. In the non-porous membrane, the copolymer may maintain a core-shell structure in which the hydrophobic portion is formed on the inside and the hydrophilic portion is formed on the outside, and in that case, the hydrophilic portion and the hydrophobic portion may be formed by the core portion and the shell portion of two or more of the copolymers adjacent to each other. The copolymer may have a core-shell structure before the non-porous membrane is formed, and may not maintain the core-shell structure during the non-porous membrane formation.

[0041] The copolymer preferably contains a structural unit derived from the monomer (a) as a portion constituting the hydrophilic portion. Examples of the monomer (a) include a glycidyl group-containing monomer, a hydrolyzable silyl group-containing monomer, an acetoacetyl group-containing monomer, a hydroxyl group-containing monomer, a carboxy group-containing monomer, methyl (meth)acrylate, and a monomer having a cationic functional group as described below. Among them, a carboxy group-containing monomer, methyl (meth)acrylate, and a monomer having a cationic functional group as described below are preferable. The monomer (a) may be used alone or in combination of two or more kinds. In this specification, "(meth)acrylic" refers to at least one of "acrylic" and "methacrylic".

[0042] Examples of the glycidyl group-containing monomer include glycidyl (meth)acrylate and glycidyl (meth)allyl ether.

[0043] Examples of the hydrolyzable silyl group-containing monomer include vinyl-based silyl group-containing monomers such as vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris(β-methoxyethoxy)silane, and vinylmethyldimethoxysilane; and (meth)acryloxy-based silyl group-containing monomers such as γ-(meth)acryloxypropyltrimethoxysilane, γ-(meth)acryloxypropylmethyldimethoxysilane, γ-(meth)acryloxypropyltriethoxysilane, and γ-(meth)acryloxypropylmethyldiethoxysilane.

[0044] Examples of the acetoacetyl group-containing monomer include diacetoacetic acid allyl ester, acetoacetoxyethyl (meth)acrylate, acetoacetoxyethyl crotonate, acetoacetoxypropyl (meth)acrylate, acetoacetoxypropyl crotonate, and 2-cyanoacetoacetoxyethyl (meth)acrylate.

[0045] Examples of the hydroxyl group-containing monomer include hydroxyl group-containing (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate.

[0046] Examples of the carboxy group-containing monomer include acid anhydride monomers such as crotonic acid, maleic acid, and maleic anhydride, fumaric acid, citraconic acid, glutaconic acid, itaconic acid, acrylamido-N-glycolic acid, cinnamic acid, and (meth)acrylic acid.

[0047] Moreover, as the monomer (a), methyl (meth)acrylate and / or (meth)acrylic acid are particularly preferred, that is, the hydrophilic portion preferably contains a constituent unit represented by the following formula (1). [ka] (R 1 , R 2 each independently represents a hydrogen atom or a methyl group.

[0048] The content of the monomer (a) is preferably 20 mol% to 70 mol%, more preferably 30 mol% to 70 mol%, and even more preferably 40 mol% to 60 mol% based on the total monomer components constituting the copolymer. By adjusting the content of the monomer (a) within this range, a hydrophilic portion can be formed in the nonporous membrane, and a water-conducting path can be easily formed, resulting in superior moisture permeability.

[0049] The copolymer preferably contains a structural unit derived from the monomer (b) as a portion constituting the hydrophobic portion. The monomer (b) is not particularly limited, but is preferably one containing a hydrocarbon group having 2 or more carbon atoms, more preferably a (meth)acrylic acid ester having a hydrocarbon group having 2 or more carbon atoms. The monomer (b) may be used alone or in combination of two or more kinds.

[0050] Examples of the hydrocarbon group having 2 or more carbon atoms include an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, an aromatic hydrocarbon group, and groups in which two or more of these are bonded together.

[0051] Examples of the aliphatic hydrocarbon group include an alkyl group, an alkenyl group, and an alkynyl group. Examples of the alkyl group include a straight-chain or branched-chain alkyl group such as an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a hexyl group, an octyl group, an isooctyl group, a decyl group, a dodecyl group, and a stearyl group. Examples of the alkenyl group include a straight-chain or branched-chain alkenyl group such as a vinyl group, an allyl group, a methallyl group, a 1-propenyl group, an isopropenyl group, a 1-butenyl group, a 2-butenyl group, a 3-butenyl group, a 1-pentenyl group, a 2-pentenyl group, a 3-pentenyl group, a 4-pentenyl group, and a 5-hexenyl group. Examples of the alkynyl group include a straight-chain or branched-chain alkynyl group such as an ethynyl group, a propynyl group, and the like.

[0052] Examples of the alicyclic hydrocarbon group include cycloalkyl groups having 3 to 12 carbon atoms, such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclododecyl group; cycloalkenyl groups having 3 to 12 carbon atoms, such as a cyclohexenyl group; and bridged cyclic hydrocarbon groups having 4 to 15 carbon atoms, such as a bicycloheptanyl group and a bicycloheptenyl group.

[0053] Examples of the aromatic hydrocarbon group include aryl groups having 6 to 14 carbon atoms, such as a phenyl group and a naphthyl group (particularly, an aryl group having 6 to 10 carbon atoms).

[0054] The above-mentioned hydrocarbon group having 2 or more carbon atoms is preferably an aliphatic hydrocarbon group or an aromatic hydrocarbon group, more preferably a straight-chain or branched-chain alkyl group or an aromatic hydrocarbon group.

[0055] Among them, the monomer (b) is preferably a monomer capable of forming a structural unit represented by the following formula (2) and / or the following formula (3). That is, the hydrophobic portion preferably contains a structural unit represented by the following formula (2) and / or the following formula (3). [ka] (R 1 represents a hydrogen atom or a methyl group, and R 3 represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms. [ka] (R 1 represents a hydrogen atom or a methyl group, and R 4 represents a branched alkyl group having 3 or more carbon atoms.

[0056] In the above formula (2), R 3 The bonding position of is preferably any one of the hydrocarbons constituting the benzene ring. Examples of monomers capable of forming the structural unit represented by the above formula (2) include styrene, α-methylstyrene, p-methylstyrene, and p-ethylstyrene.

[0057] In the above formula (3), R 4 The number of carbon atoms is preferably 3 to 10. Examples of monomers capable of forming the constitutional unit represented by the above formula (3) include isopropyl (meth)acrylate, isobutyl (meth)acrylate, tert-butyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate.

[0058] The content of the monomer (b) is preferably 20 mol% to 70 mol%, more preferably 30 mol% to 70 mol%, and even more preferably 40 mol% to 60 mol% based on the total monomer components constituting the copolymer. By adjusting the content of the monomer (b) within this range, hydrophobic parts can be formed in the nonporous membrane, making it easy to form water-conducting paths, and the moisture permeability is improved.

[0059] The thermoplastic resin may have a cationic moiety in the hydrophilic part and / or the hydrophobic part, or may have other parts. The thermoplastic resin preferably has a cationic moiety in the hydrophilic part. The cationic moiety is preferably a cationic functional group or a group capable of generating a cationic functional group. The group capable of generating a cationic functional group refers to a group that does not have a cationic functional group in the thermoplastic resin stage, but generates a cationic functional group at the stage of forming the nonporous membrane or during use. The cationic functional group may be a zwitterionic functional group in which both cations and anions exist. Therefore, the thermoplastic resin may have an anionic moiety. The thermoplastic resin preferably does not have an anionic moiety.

[0060] Examples of the cationic functional group include nitrogen-containing groups. Examples of the nitrogen-containing groups include groups containing ammonium ions or groups capable of forming ammonium ions. Here, the group capable of forming ammonium ions refers to a group that is not ionized at the stage of the thermoplastic resin, but forms an ionized form at the stage of forming the nonporous membrane or during use. Examples of the group containing ammonium ions and the group capable of generating ammonium ions include cyclic groups containing nitrogen atoms such as primary amino groups, secondary amino groups, tertiary amino groups, quaternary ammonium groups, imino groups (-NH- groups and =NH groups), amidino groups, imidino groups, hydrazino groups, amide groups, imide groups, and pyridyl groups. Examples of the zwitterionic functional group include quaternary ammonium-containing groups. Examples of the quaternary ammonium-containing groups include betaine groups and phosphocholine groups. Among these, in the above-mentioned thermoplastic resins, from the viewpoint of exerting antibacterial properties and preventing the dispersion of germs from the non-porous membrane, groups capable of generating ammonium ions after the non-porous membrane is formed are preferred, and groups capable of generating quaternary ammonium groups (quaternary ammonium groups, imide groups) are more preferred.

[0061] When the thermoplastic resin is the copolymer, the copolymer preferably contains a structural unit derived from a monomer having a cationic functional group in a side chain. The monomer having the cationic functional group includes the monomer having the nitrogen-containing group as a functional group. The monomer having the nitrogen-containing group as a functional group includes, for example, an amide group-containing monomer, an amino group-containing monomer, and an imide group-containing monomer. Amide group-containing monomers include N,N-dialkyl(meth)acrylamides such as N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, N,N-dipropyl(meth)acrylamide, N,N-diisopropyl(meth)acrylamide, N,N-di(n-butyl)(meth)acrylamide, and N,N-di(t-butyl)(meth)acrylamide; N-alkyl(meth)acrylamides such as N-ethyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-butyl(meth)acrylamide, and Nn-butyl(meth)acrylamide; N-vinylacetamide, N-(2-hydroxyethyl)(meth)acrylamide, and N-(2-hydroxypropyl)(meth)acrylamide; N-hydroxyalkyl (meth)acrylamides such as N-(1-hydroxypropyl) (meth)acrylamide, N-(3-hydroxypropyl) (meth)acrylamide, N-(2-hydroxybutyl) (meth)acrylamide, N-(3-hydroxybutyl) (meth)acrylamide, and N-(4-hydroxybutyl) (meth)acrylamide; N-alkoxyalkyl (meth)acrylamides such as N-methoxymethyl (meth)acrylamide, N-methoxyethyl (meth)acrylamide, and N-butoxymethyl (meth)acrylamide; and others such as N,N-dimethylaminopropyl (meth)acrylamide and N-(meth)acryloylmorpholine. In addition, examples of amino group-containing monomers include substituted or unsubstituted amino group-containing (meth)acrylates such as aminoethyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate, and t-butylaminoethyl (meth)acrylate.Examples of imide group-containing monomers include N-(meth)acryloyloxymethylene succinimide, N-(meth)acryloyl-6-oxyhexamethylene succinimide, N-(meth)acryloyl-8-oxyhexamethylene succinimide, N-cyclohexylmaleimide, N-isopropylmaleimide, N-laurylmaleimide, N-phenylmaleimide, N-methylitaconimide, N-ethylitaconimide, N-butylitaconimide, N-octylitaconimide, N-2-ethylhexylitaconimide, N-cyclohexylitaconimide, and N-laurylitaconimide. The above-mentioned monomers having cationic functional groups may be used alone or in combination of two or more.

[0062] The content of the monomer having the cationic functional group is preferably 0.5 mol% to 10 mol%, more preferably 1 mol% to 7 mol%, and even more preferably 2 mol% to 5 mol% based on the total monomer components constituting the copolymer. By adjusting the content of the monomer having the cationic functional group within this range, it becomes possible to exert a repulsive force against the scale components, and the adhesion and deposition of the scale components on the nonporous membrane can be suppressed.

[0063] The copolymer may also contain a structural part derived from a crosslinking agent. The crosslinking agent is not particularly limited as long as it is a compound capable of crosslinking with the side chain of the monomer constituting the copolymer. For example, a bifunctional substance having two reactive functional groups is preferred, and a trifunctional or higher crosslinking agent may be used from the viewpoint of increasing the range of the crosslinking density in the polymer and adjusting the mechanical properties. Examples of the crosslinking agent include a bifunctional or higher epoxy group-containing compound and a bifunctional or higher isocyanate group-containing compound. In the copolymer, a bifunctional or higher epoxy group-containing compound is particularly preferred because it is possible to generate quaternary ammonium ions after the crosslinking reaction with the functional group formed on the side chain.

[0064] Examples of the epoxy group-containing compound include bisphenol A and epichlorohydrin type epoxy compounds, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, diglycidylaniline, N,N,N',N'-tetraglycidyl-m-xylylenediamine (e.g., trade name "TETRAD-X", manufactured by Mitsubishi Gas Chemical Co., Ltd.), and 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane (e.g., trade name "TETRAD-C", manufactured by Mitsubishi Gas Chemical Co., Ltd.).

[0065] The amount of the crosslinking agent used is preferably 1 to 60 parts by mole, more preferably 2 to 30 parts by mole, and even more preferably 4 to 15 parts by mole, relative to the total amount (100 parts by mole) of the reactive side chains of the copolymer. By adjusting the amount of the crosslinking agent used within this range, it becomes possible to easily form water-conducting paths in the nonporous membrane, and it becomes easy to achieve excellent moisture permeability.

[0066] The weight average molecular weight of the thermoplastic resin is not particularly limited, but is preferably 20,000 to 2,000,000, more preferably 30,000 to 1,500,000, further preferably 50,000 to 1,000,000, and particularly preferably 70,000 to 500,000. The weight average molecular weight is measured by gel permeation chromatography (GPC) and calculated in terms of polystyrene.

[0067] The non-porous membrane may contain other components other than the thermoplastic resin within a range that does not impair the effect of the humidifying laminate of the present disclosure. Examples of the other components include preservatives, antiblocking agents, release agents, and leveling agents. The content of the other components is preferably 0.1 to 10 parts by mass, more preferably 0.15 to 3 parts by mass, and particularly preferably 0.2 to 2 parts by mass, relative to the total amount (100 parts by mass) of the copolymer.

[0068] Due to the fact that the copolymer has a hydrophilic portion and a hydrophobic portion, the non-porous membrane preferably has a structure in which the hydrophilic portion and the hydrophobic portion are phase-separated on the surface. The maximum diameter of the hydrophilic portion on the surface of the non-porous membrane is preferably 50 nm or less, more preferably 20 nm or less. If the maximum diameter of the hydrophilic portion is 50 nm or less, substances with a size exceeding 50 nm are unlikely to permeate the non-porous membrane, and the non-porous membrane can be used as a barrier film that does not allow substances of 50 nm or more (such as viruses) to permeate. The diameter of the hydrophilic portion is evaluated by the following method. The adhesion force measurement mode of a scanning probe microscope (SPM) is used to digitize the high adhesion force portion (hydrophilic portion) and the low adhesion force portion (hydrophobic portion) according to adhesion force, and the diameter of the hydrophilic portion can be calculated as a circle equivalent diameter by processing the results with image analysis software. The maximum diameter is the largest diameter among the diameters (circle equivalent diameters) of the hydrophilic portions calculated as described above.

[0069] In the present disclosure, the structure in which the maximum diameter of the hydrophilic portion is 50 nm or less does not transmit components with a size of 50 nm or more, and therefore substantially transmits only water vapor, and therefore the pores of the non-porous membrane in the present disclosure exclude those formed in the hydrophilic portion with a diameter of 50 nm or less. In addition, when the maximum diameter of the hydrophilic portion exceeds 50 nm, there is a possibility that components other than water vapor may be transmitted, so a membrane having a plurality of structures in which the maximum diameter of the hydrophilic portion exceeds 50 nm is defined as a porous membrane.

[0070] The non-porous membrane is preferably a layer formed by coating. By forming the non-porous membrane by coating, it is possible to easily produce the non-porous membrane, and it becomes easy to suppress the scattering of scale components, germs, and the like.

[0071] <Polyporous reinforcement material> The porous reinforcing material is an element that serves as a support for the non-porous membrane, and is preferably one that has excellent moisture permeability.

[0072] The material for forming the porous reinforcing material may be either hydrophilic or hydrophobic, but is preferably hydrophobic.When the hydrophobic material is used, when the composition for forming the non-porous membrane is applied, the composition does not soak into the porous reinforcing material, so that the lead substrate for preventing the composition from flowing down from the surface opposite to the surface for forming the coating film is not required.

[0073] Examples of materials for forming the porous reinforcing material include organic materials such as polyolefin resins, cellulose resins, polycarbonate resins, polyamide resins, polyimide resins, polyamideimide resins, and fluorine-based resins, and inorganic materials such as metals, glass, and ceramics. Among them, the non-porous membrane is preferably an organic material because it can be formed on the porous reinforcing material at a relatively low temperature, and from the viewpoint of excellent moisture permeability and water resistance, and polyolefin resins are particularly preferable as the organic material. The material may be fibrous, such as metal fibers and inorganic fibers. The material for forming the porous reinforcing material may be one type only, or two or more types.

[0074] Examples of the porous reinforcing material include a resin porous film, an inorganic porous film, a metal porous film, and a fibrous substrate.

[0075] The polyolefin resin is a polymer (including an olefin elastomer) that is composed of an olefin as an essential monomer component, that is, a polymer that contains at least a structural unit derived from an olefin in the molecule (per molecule). The olefin is not particularly limited, but examples thereof include α-olefins such as ethylene, propylene, 1-butene, and 4-methyl-1-pentene.

[0076] Examples of the polyolefin resin include polymers having ethylene as an essential monomer component (polyethylene resins), polymers having propylene as an essential monomer component (polypropylene resins), ionomers, and amorphous cyclic olefin polymers.

[0077] The porosity of the porous reinforcing material is not particularly limited, but is preferably 30% by volume to 90% by volume, and more preferably 40% by volume to 70% by volume. If the porosity is 30% by volume or more, the moisture permeability is better. If the porosity is 90% by volume or less, the supporting performance of the non-porous membrane is better.

[0078] The thickness of the porous reinforcing material is not particularly limited, but is preferably 5 μm or more, more preferably 10 μm or more, from the viewpoint of being able to sufficiently support the non-porous membrane. Also, the thickness of the porous reinforcing material is preferably 50 μm or less, more preferably 30 μm or less, from the viewpoint of excellent moisture permeability and taking into consideration economical efficiency.

[0079] The surface of the porous reinforcing material on the side where the non-porous membrane is provided (for example, surface 11a shown in FIG. 1) is preferably subjected to a hydrophilization treatment in order to facilitate the formation of the non-porous membrane. In particular, when a hydrophobic material is used as a material for forming the porous reinforcing material, the hydrophilization treatment is preferably performed. Examples of the hydrophilization treatment include corona discharge treatment and plasma treatment. These hydrophilization treatments can generate carboxyl groups, hydroxyl groups, or carbonyl groups on the surface of the porous reinforcing material, making it easier for the composition for forming the non-porous membrane to wet and spread on the surface of the porous reinforcing material, and facilitating the formation of the non-porous membrane. This also improves the adhesion between the porous reinforcing material and the non-porous membrane. In addition, when the porous reinforcing material formed from a hydrophobic base material is stored as a roll, one surface and the other surface of the porous reinforcing material are in contact with each other in the roll, but since one hydrophilic surface and the other hydrophobic surface are in contact with each other, blocking can be suppressed.

[0080] The surface tension of the surface of the porous reinforcing material on which the non-porous membrane is formed is preferably 35 dyn / cm to 55 dyn / cm, more preferably 37 dyn / cm to 50 dyn / cm. When the surface tension is 35 dyn / cm or more, it becomes easy to apply the composition for forming the non-porous membrane, and the non-porous membrane is easily formed. When the surface tension is 55 dyn / cm or less, the composition for forming the non-porous membrane does not wet and spread too much, and the non-porous membrane can be easily formed on the surface of the porous reinforcing material. In addition, when the surface of the porous reinforcing material is hydrophilized, the surface on which the non-porous membrane is formed is the surface that has been subjected to the hydrophilization treatment.

[0081] The surface tension of the inside of the porous reinforcing material (i.e., the inside where the non-porous membrane is not formed) is preferably less than 35 dyn / cm, more preferably 33 dyn / cm or less. If the surface tension is less than 35 dyn / cm, the composition for forming the non-porous membrane is prevented from penetrating into the inside of the porous reinforcing material, and the non-porous membrane can be easily formed on the surface of the porous reinforcing material. In addition, when the surface of the porous reinforcing material is hydrophilized, the inside of the porous reinforcing material is the inside where the hydrophilization treatment is not performed. In addition, the surface tension of the inside can be obtained by measuring the cross section of the porous reinforcing material.

[0082] The moisture content of the porous reinforcing material at a relative humidity of 100% is preferably 0.01% to 0.5%, more preferably 0.05% to 0.4%, and particularly preferably 0.1% to 0.3%. From the viewpoint of making the moisture content of the nonporous membrane 10 times or more that of the porous reinforcing material, the moisture content of the porous reinforcing material at a relative humidity of 100% is preferably within the above range.

[0083] The adsorption isotherm of the porous reinforcing material is preferably any one of IUPAC types I to VI, more preferably type III. When the adsorption isotherm of the porous reinforcing material is any one of IUPAC types I to VI, the water retention of the non-porous membrane tends to increase, making it easier to exhibit moisture permeability.

[0084] The porous reinforcement material has a moisture permeability of 1350g / (m2) under conditions of a temperature of 20°C, a relative humidity of 65%, and a wind speed of 0.1m / s, based on the moisture permeability test method (cup method) of JIS Z0208-1976. 2 24h) or less, and more preferably 1000g / (m 2 24h or less.

[0085] In addition, the porous reinforcing material has a moisture permeability of 18,000 g / (m) under conditions of a temperature of 20°C, a relative humidity of 30%, and a wind speed of 2.4 m / s, based on the moisture permeability test method (cup method) of JIS Z0208-1976. 2 24h) or less, and more preferably 15000g / (m 2 ·24h) or less, and more preferably 10,000g / (m 2 24h or less.

[0086] The humidification laminate has a moisture permeability of 1350 g / (m2) under conditions of a temperature of 20°C, a relative humidity of 65%, and a wind speed of 0.1 m / s, based on the moisture permeability test method (cup method) of JIS Z0208-1976. 2 24h), and more preferably 1370g / (m 2 The humidification laminate has excellent moisture permeability, and the moisture permeability is 1350 g / (m 2 -24h) or more.

[0087] The humidifying laminate has a moisture permeability of 18,000 g / (m) under conditions of a temperature of 20° C., a relative humidity of 30%, and a wind speed of 2.4 m / s, based on the moisture permeability test method (cup method) of JIS Z0208-1976. 2 24h), and more preferably 19000g / (m 2 ·24h) or more, and more preferably 20,000g / (m 2 The humidification laminate has excellent moisture permeability, and the moisture permeability is 18000 g / (m 2 -24h) or more.

[0088] In addition, the humidifying laminate has a moisture permeability difference of 0 g / (m) under conditions of a temperature of 20° C., a relative humidity of 65%, and a wind speed of 0.1 m / s, based on the moisture permeability test method (cup method) of JIS Z0208-1976, in comparison with the porous reinforcing material alone. 2 24h) or more, and more preferably 10g / (m 2 24h) or more, and particularly preferably 30g / (m 2 24h) or more.

[0089] In addition, the humidifying laminate has a moisture permeability difference of 0 g / (m) based on the moisture permeability test method (cup method) of JIS Z0208-1976 under conditions of a temperature of 20°C, a relative humidity of 30%, and a wind speed of 02.4 m / s, in comparison with the porous reinforcing material alone. 2 24h) or more, and more preferably 1000g / (m 2 24h) or more, and particularly preferably 2000g / (m 2 24h) or more.

[0090] The thickness of the humidifier laminate is not particularly limited, but is preferably 5.5 μm to 55 μm, and more preferably 7 μm to 30 μm. When the thickness of the humidifier laminate is 5.5 μm or more, it is easy to exhibit moisture permeability, and when it is 55 μm or less, it is economical and easy to reduce the size when used in a humidifier.

[0091] [Manufacturing method of humidifying laminate] The humidifying laminate of the present disclosure can be produced by forming the non-porous membrane on at least one surface of the porous reinforcing material by a known or conventional method.For example, the non-porous membrane may be directly formed on one surface of the porous reinforcing material, or the non-porous membrane may be formed on another support, and then transferred (laminated) to one surface of the porous reinforcing material to form the non-porous membrane on the porous reinforcing material.Among them, the former method is preferred from the viewpoint of excellent adhesion between the non-porous membrane and the porous reinforcing material.

[0092] The surface of the porous reinforcing material on which the non-porous membrane is to be provided may be subjected to a hydrophilization treatment. Examples of the hydrophilization treatment include those described above.

[0093] The non-porous membrane can be formed by applying (coating) a composition for forming the non-porous membrane onto the porous reinforcing material or other support, and removing the solvent from the resulting coating by heating or the like.

[0094] Since blocking of the porous reinforcing material is suppressed by the hydrophilization treatment, the porous reinforcing material can be produced by a roll-to-roll method in which a non-porous membrane is formed on the porous reinforcing material that has been previously prepared as a wound body, and then the porous reinforcing material is again wound into a wound body.

[0095] The composition can be prepared by a known or conventional method. For example, the composition can be prepared by dissolving or dispersing the copolymer in a solvent and mixing additives such as preservatives as necessary. The solvent is preferably water and / or a water-soluble solvent. When water or a water-soluble solvent is used, it is presumed that the copolymer is dispersed in the composition in a core-shell shape with a hydrophobic part on the inside and a hydrophilic part on the outside. By using such a composition, it is presumed that when the coating film is dried, the hydrophilic part and the hydrophobic part are phase-separated to form a non-porous film with a water-conducting path, and the hydrophobic parts are firmly bonded to each other, resulting in better water resistance.

[0096] Examples of the water-soluble solvent include water-soluble aliphatic alcohols such as methanol, ethanol, n-propanol, and i-propanol; glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, and propylene glycol monoethyl ether. Only one type of the water-soluble solvent may be used, or two or more types may be used.

[0097] The proportion (concentration) of the copolymer in the composition in which the copolymer is dissolved or dispersed is not particularly limited, but is preferably 0.5 to 5% by mass, more preferably 1 to 4% by mass, and even more preferably 1.5 to 3% by mass. If the concentration is 5% by mass or less, the thickness of the coating layer becomes thicker, and the thickness of the non-porous film after drying becomes more uniform. This makes it possible to form a thinner non-porous film while having excellent gas barrier properties, and as a result, the moisture permeability is further improved. In addition, if the concentration is within the above range, it is easy to form a non-porous film that is excellent in coatability, moisture permeability, and gas barrier properties.

[0098] The composition may be applied (coated) by a known coating method. For example, a coater such as a gravure roll coater, a reverse roll coater, a kiss roll coater, a dip roll coater, a bar coater, a knife coater, a spray coater, a comma coater, or a direct coater may be used. Forming the film by such coating makes it easy to form a non-porous film.

[0099] The heating temperature when removing the solvent from the coating film is preferably 35°C to 90°C, more preferably 40°C to 85°C, and even more preferably 45°C to 80°C. The heating time can be appropriately selected, and is, for example, 5 seconds to 20 minutes, preferably 5 seconds to 10 minutes, and more preferably 10 seconds to 5 minutes. Since the composition can be used to form a non-porous film at a low temperature of 90°C or less (particularly 80°C or less), film formation is easy, and a polyolefin resin with excellent moisture permeability can be used as a porous reinforcing material.

[0100] The humidifying laminate in which the non-porous membrane is formed on at least one surface of the porous reinforcing material by the above-mentioned method can reduce the size of the humidifier while having excellent moisture permeability. The humidifying laminate means a laminate through which water vapor can be moved. The humidifying laminate can also be used as a moisture-permeable barrier film since it has a structure in which the hydrophilic portion and the hydrophobic portion are phase-separated. When the diameter of the hydrophilic portion is small, the moisture-permeable barrier film allows small-sized hydrophilic substances (e.g., water vapor) to pass through the hydrophilic portion and prevents large-sized substances (e.g., viruses) from passing through, thereby separating the two.

[0101] Furthermore, since the humidifier laminate can be made thinner than conventional moisture-permeable membranes, when used in a humidifier, the shape itself can be made smaller, which is also economical.

[0102] [Bag-shaped water-retaining container] The humidifying laminate covers the outside of the frame to produce a bag-shaped water-retaining container.

[0103] The frame is preferably made of a material having rigidity, such as a resin, a metal, or an alloy material. The frame may be a plate-shaped or bag-shaped frame produced by extrusion molding, a plate-shaped frame produced by injection molding, or a bag-shaped structure may be produced by bonding two or more plate-shaped frames together. A hole may be provided after the bag-shaped frame is produced, or a frame with a hole provided in advance may be produced.

[0104] It is preferable that the laminate is attached to the frame in part or in whole at the contact portion between the laminate and the frame. The method for attaching the laminate to the frame is not particularly limited, but the laminate can be attached to the frame by a known or commonly used adhesive, or by a fusion method such as ultrasonic fusion, high frequency fusion, or heat fusion.

[0105] The above-mentioned method can be used to fabricate a bag-shaped water-retaining container. The bag-shaped water-retaining container has a laminate disposed on the outside of a frame structure, and liquid water passed through the bag-shaped water-retaining container is absorbed as water vapor by the laminate, which diffuses within the laminate and can release water vapor from the entire laminate.

[0106] In addition, a humidifier can be manufactured by mounting a plurality of the bag-shaped water-retaining containers. Since such a humidifier has improved humidification performance compared to conventional humidifiers, it is possible to miniaturize the humidifier while still achieving the same performance, and it is also advantageous in terms of cost.

[0107] Therefore, since the humidifier has the humidifying laminate and can be made smaller by improving the moisture permeability, the humidifier can be suitably used for applications such as air conditioners, ventilators, and air purifiers.

[0108] Each aspect disclosed in this specification can be combined with any other feature disclosed in this specification. Each configuration in each embodiment and their combinations are examples, and addition, omission, substitution, and other modifications of the configuration are possible as appropriate within the scope of the gist of this disclosure. In addition, each invention according to this disclosure is not limited by the embodiments or the following examples, but is limited only by the scope of the claims. EXAMPLES

[0109] Hereinafter, one embodiment of the present disclosure will be described in more detail based on examples.

[0110] Example 1 100 parts by mass of a thermoplastic resin solution containing 47 mol parts of isobutyl acrylate and 1 mol part of styrene as constituent units forming a hydrophobic portion in a polymer, 21 mol parts of acrylic acid and 28 mol parts of methyl acrylate as constituent units forming a hydrophilic portion, 3 mol parts of imide as constituent units forming a cationic portion, and 2 mol parts of an epoxy compound as a crosslinking agent was diluted with 22 mol parts of ethanol and 143 mol parts of distilled water to prepare a coating liquid with a resin concentration of 10% by mass. On the other hand, a corona treatment was performed on one surface of a porous substrate made of polypropylene resin (thickness: 20 μm, porosity: 48% by volume) to form a hydrophilic surface with a surface tension of 39 dyn. Then, the composition was applied to the hydrophilic surface of the porous reinforcing material using a wire bar, and heated at 70 ° C. for 1 minute to form a non-porous membrane (thickness: 1 μm). In this way, a humidifying laminate of Example 1 was produced.

[0111] Examples 2 to 3 Humidification laminates of Examples 2 and 3 were produced in the same manner as in Example 1, except that the thickness of the nonporous membrane was changed.

[0112] [evaluation] The humidifying laminates obtained in the examples and comparative examples were evaluated as follows. The evaluation results are shown in the table. In addition, a polypropylene resin porous substrate without a non-porous membrane was evaluated as Comparative Example 1.

[0113] (1) Moisture permeability The moisture permeability of the humidifying laminates obtained in the examples and comparative examples was measured based on the moisture permeability test method (cup method) of JIS Z0208-1976. Specifically, the humidifying laminates obtained in the examples and comparative examples were left to stand in a measurement environment for 2 hours or more, and then the moisture permeable cup was covered with a moisture permeable sheet to make it airtight. Then, the moisture permeable cup containing 40 g of water was placed in a thermo-hygrostat chamber at a temperature of 20°C, a relative humidity of 30%, and a wind speed of 2.4 m / s, and the reduction in the total mass of the water and the moisture permeable cup after 1 hour was measured using a test piece of 1 m 2 The moisture permeability was calculated by converting it into mass per 24 hours. The moisture permeability was also measured under the same conditions: temperature 20°C, relative humidity 65%, and essentially no wind (wind speed 0.1 m / s).

[0114] (2) Moisture content The moisture content of each of the humidifying laminates obtained in the examples and comparative examples was measured by a water vapor adsorption method.

[0115] [Table 1]

[0116] As shown by the results of Examples 1 to 3, it was confirmed that the humidification laminate of the present disclosure, having a nonporous membrane, has moisture permeability equal to or higher than that of the porous reinforcing material alone shown in Comparative Example 1. Furthermore, it was also confirmed that the moisture permeability improves as the nonporous membrane becomes thicker.

[0117] Variations of the invention according to the present disclosure are described below. [Appendix 1] A laminate for humidification comprising a porous reinforcing material and a non-porous membrane laminated on at least one surface of the porous reinforcing material and functioning as a moisture-permeable membrane, the moisture permeability of the laminate being equal to or greater than the moisture permeability of the porous reinforcing material alone. [Appendix 2] The humidification laminate according to claim 1, wherein the non-porous membrane has a property that the thicker the membrane, the higher the moisture permeability. [Appendix 3] 3. The humidifying laminate according to claim 1 or 2, wherein the adsorption isotherm of the porous reinforcing material is any one of IUPAC types I to VI. [Appendix 4] 4. The humidifying laminate according to any one of claims 1 to 3, wherein the adsorption isotherm of the porous reinforcing material is type III as indicated by IUPAC. [Appendix 5] 5. The humidifying laminate according to any one of claims 1 to 4, wherein the adsorption isotherm of the nonporous membrane is any one of IUPAC types I to VI. [Appendix 6] 6. The humidifying laminate according to any one of claims 1 to 5, wherein the adsorption isotherm of the nonporous membrane is type III as indicated by IUPAC. [Appendix 7] 7. The humidification laminate according to any one of claims 1 to 6, wherein the nonporous membrane has a moisture content 15 times or more that of the porous reinforcing material at a relative humidity of 100%. [Appendix 8] 8. The humidifying laminate according to any one of claims 1 to 7, wherein the non-porous membrane is disposed on the liquid water side of the porous reinforcing material and is used to absorb the liquid water and release it into the air. [Appendix 9] The non-porous membrane comprises a thermoplastic resin having a cationic moiety, and the cationic moiety contains a group containing an ammonium ion or a group capable of forming an ammonium ion. [Appendix 10] 10. The humidifying laminate according to any one of claims 1 to 9, wherein the thermoplastic resin has a hydrophilic portion, and the hydrophilic portion contains a constitutional unit represented by the following formula (1): [ka] (R 1 ,R 2 each independently represents a hydrogen atom or a methyl group. [Appendix 11] The thermoplastic resin has a hydrophobic portion, and the hydrophobic portion contains a structural unit represented by the following formula (2) and / or the following formula (3): [ka] (R 1 represents a hydrogen atom or a methyl group, and R 3 represents an alkyl group having 1 to 2 carbon atoms. [ka] (R 1 represents a hydrogen atom or a methyl group, and R 4 indicates a branched alkyl group having 3 or more carbon atoms. [Appendix 12] 12. The humidification laminate according to any one of claims 1 to 11, wherein the non-porous membrane is coated so as to cover at least one surface of the porous reinforcing material. [Appendix 13] A humidifier comprising a plurality of bag-shaped water-retaining containers each formed by bonding the humidifying laminate according to any one of claims 1 to 12 to a frame. [Appendix 14] Attachment 13. An air conditioner equipped with a humidifier. [Appendix 15] 14. A ventilation system equipped with a humidifier as described in appended claim 13. [Appendix 16] Attachment 13. An air purifier equipped with a humidifier. [Explanation of symbols]

[0118] 1. Laminate 11 Perforated reinforcement 11a One side of the porous reinforcement 12 Non-porous membrane

Claims

1. A laminate having a porous reinforcing material and a non-porous membrane that is laminated on at least one surface of the porous reinforcing material and functions as a moisture-permeable membrane, the moisture permeability of the laminate being equal to or greater than the moisture permeability of the porous reinforcing material alone, The thickness of the non-porous membrane is 0.5 μm to 5 μm, The non-porous membrane has a property that the moisture permeability increases as the membrane becomes thicker, The non-porous membrane contains a thermoplastic resin, The thermoplastic resin has a hydrophilic portion, and the hydrophilic portion includes one or more structural units selected from the group consisting of a structural unit derived from a glycidyl group-containing monomer, a structural unit derived from a hydrolyzable silyl group-containing monomer, a structural unit derived from an acetoacetyl group-containing monomer, and a structural unit represented by the following formula (1): 【Chemistry 1】 (R 1 and R 2 each independently represent a hydrogen atom or a methyl group).

2. 2. The humidifying laminate according to claim 1, wherein the adsorption isotherm of said porous reinforcing material is any one of IUPAC types I to VI.

3. 3. The humidifying laminate according to claim 1, wherein the adsorption isotherm of said porous reinforcing material is Type III as defined by IUPAC.

4. 3. The humidifying laminate according to claim 1, wherein the adsorption isotherm of said non-porous membrane is any one of types I to VI indicated by IUPAC.

5. 3. The humidifying laminate according to claim 1, wherein the adsorption isotherm of said non-porous membrane is Type III as defined by IUPAC.

6. 3. The humidifying laminate according to claim 1, wherein said non-porous membrane has a moisture content 10 times or more that of said porous reinforcing material at a relative humidity of 100%.

7. 3. The humidifying laminate according to claim 1, wherein the non-porous membrane is disposed on the liquid water side of the porous reinforcing material and is used to absorb the liquid water and release it into the air.

8. 3. The humidifying laminate according to claim 1, wherein the non-porous membrane comprises a thermoplastic resin having a cationic moiety, and the cationic moiety contains a group containing an ammonium ion or a group capable of forming an ammonium ion.

9. A humidifying laminate as described in claim 1 or 2, wherein the hydrophilic portion contains a constituent unit represented by the following formula (1): 【Chemistry 1】 (R １ , R ２ each independently represents a hydrogen atom or a methyl group.

10. The humidifying laminate according to claim 1 or 2, wherein the thermoplastic resin has a hydrophobic portion, and the hydrophobic portion contains a constitutional unit represented by the following formula (2) and / or the following formula (3): 【Chemistry 2】 (R １ represents a hydrogen atom or a methyl group, R ３ represents an alkyl group having 1 to 2 carbon atoms. 【Chemistry 3】 (R １ represents a hydrogen atom or a methyl group, R ４ represents a branched alkyl group having 3 or more carbon atoms.

11. 3. The humidifying laminate according to claim 1, wherein said non-porous membrane is coated so as to cover at least one surface of said porous reinforcing material.

12. A humidifier comprising a plurality of bag-shaped water-retaining containers each formed by bonding the humidifying laminate according to claim 1 or 2 to a frame.

13. An air conditioner equipped with the humidifier according to claim 12.

14. A ventilation device equipped with the humidifier according to claim 12.

15. An air purifier equipped with the humidifier according to claim 12.

Images