JP5358109B2 - Manufacturing method of humidity control building materials - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a moisture-conditioning building material capable of preventing a moisture-conditioning performance from being impaired by allowing water content to surely pass through an adhesive layer. <P>SOLUTION: In this moisture-conditioning building material 10, a permeable surface layer material 12 is installed on the upper surface of a base 11 having a moisture-conditioning property, and the adhesive layer 13 is formed therebetween. The adhesive layer 13 is so structured that the gaps 3 scattered in a hard emulsion adhesive agent 1A around a dry polymeric moisture-conditioning agent 2 form permeable holes 4 communicating between the base 11 and the surface layer material 12. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention, a surface layer material having a substrate and a moisture permeability with humidity conditioning to a method of manufacturing a regulating Shimeken material adhered with emulsion adhesive.

  Conventionally, when a humidity control building material is manufactured by adhering a surface layer material such as a veneer or a sheet having moisture permeability to an adhesive base material with an adhesive, the adhesive layer hinders moisture movement, and moisture absorption performance and This was a factor in the loss of moisture release performance.

In order to solve such problems, it is naturally possible to use an aqueous adhesive such as starch paste having moisture permeability. Patent Document 1 describes the contents of laminating a moisture absorbing / releasing sheet on a substrate using an adhesive having moisture permeability.
JP 2000-351102 A

  However, even if a moisture-permeable adhesive such as a water-based adhesive or silica gel is used as the adhesive, it is configured to block the base material from the surface material by the cured adhesive layer. Therefore, moisture transfer to or from the humidity control substrate is not ensured, and therefore a humidity control building material capable of reliably passing water through the adhesive layer has been demanded.

The present invention has such circumstances has been proposed in consideration of, its objective is the production of novel tone Shimeken material more reliably be caused by humidity performance liquid passing of the adhesive layer is prevented from being inhibited It is to provide a method.

In order to achieve the above object, a method for producing a humidity control building material according to claim 1, wherein the humidity control base material and the moisture permeable surface layer material are bonded with a thermosetting emulsion adhesive. A manufacturing method for building materials, in which a thermosetting emulsion adhesive is added and mixed with a polymer humidity conditioner, and the base material and the surface layer material are bonded together and hot-pressed, thereby thermosetting Curable emulsion adhesive is cured, and then the polymer humidity conditioner is dried and shrinks later, so that the polymer humidity conditioner is surrounded by the previously cured thermosetting emulsion adhesive. Voids are formed, and moisture permeable holes communicating with the base material and the surface layer material are formed by these voids .

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According to the humidity control building material produced by the method of manufacturing a humidity control building material of the present invention, a dried polymer humidity control agent is applied to the adhesive layer between the base material having humidity control and the surface layer material having moisture permeability. Since there are continuous moisture-permeable holes formed by voids formed around the periphery of the substrate, the moisture-permeable holes can ensure moisture passage through the adhesive layer, thereby adjusting the substrate. The wet function can be maintained.

  Further, according to the method for producing a humidity-control building material of the present invention, a polymer humidity-controlling agent is added to and mixed with the emulsion-based adhesive, and the adhesive is used for communication by a method such as pressing or hot pressing. Since it is a structure which forms a moisture permeable hole, manufacture can be performed easily and methods, such as a conventional press and a hot press, can be utilized as it is.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an example of a method for producing a humidity-control building material according to a first embodiment of the present invention in time series, and (a) to (c) are schematic longitudinal sectional views.

  In FIG. 1, 11 is a base material having humidity control (hereinafter referred to as a humidity control base material), 12 is a surface layer material, 13 is an adhesive layer, and 10 is a humidity control building material manufactured by the same manufacturing method.

  As the humidity control substrate 11, various materials having a function of adjusting ambient humidity by independently absorbing and releasing water vapor can be used. For example, activated humidity, diatomaceous earth, silica gel, zeolite, allophane, activated clay, sepiolite, etc., as a humidity control substrate 11, a gypsum board, a cement board, a calcium silicate board, a rock wool fiber, and the like having a humidity control function. Inorganic materials such as boards, and wood materials such as wood fiber boards, plywood, and particle boards can be used. There are many pores (not shown) in these humidity conditioner raw materials, and these exhibit a humidity control action.

  The surface layer material 12 is laminated on the surface of the humidity control substrate 11 and appears on the surface of the humidity control building material 10 after manufacture, and has moisture permeability. Examples of the surface layer material 12 include a veneer obtained by thinly slicing natural wood, a vinyl chloride resin sheet, printing paper, a nonwoven fabric, and a cross sheet.

  As the adhesive 13a for forming the adhesive layer 13, an aqueous emulsion adhesive 1A can be used as a main material. As the aqueous emulsion adhesive 1A, for example, in addition to a starch adhesive, a resin such as vinyl acetate, vinyl chloride, ethylene-vinyl acetate copolymer, or silicone is added with a solvent such as water and an emulsifier to emulsify or Those produced by emulsion polymerization can be used. As such, an adhesive that adheres when the solvent evaporates and the solute hardens is used as the aqueous emulsion adhesive 1A used in the present embodiment.

  In this aqueous emulsion adhesive 1A, a polymer humidity conditioner (organic polymer moisture absorbent / release agent) 2 is added and mixed so that they are dispersed and scattered. The particles are swollen with moisture in the adhesive 13a.

  This organic polymer moisture-absorbing / releasing agent 2 is an organic substance having a relatively sparse structure containing many hydrophilic functional groups such as hydroxyl groups and carboxyl groups, and can absorb and store a large amount of water exceeding its own volume. Can be used. Specifically, a known general superabsorbent polymer is used. For example, starch-acrylic acid graft polymer, starch-acrylonitrile graft polymer, cellulose-acrylonitrile graft polymer, polyvinyl alcohol cross-linked polymer, polyacrylic polymer Sodium acid cross-linked product, saponified product of methyl acrylate-vinyl acetate copolymer and the like are used. It is also possible to use natural products such as potato starch and dextrins. These organic moisture absorbing / releasing agents can be used alone or in admixture of two or more.

  Moreover, as a suitable organic polymer moisture absorbent / release agent 2, one having a moisture absorption rate of 45 to 55%, a volume change by moisture absorption / release of about 10% of the diameter, and a particle size of 0.9 to 4 μm can be used. Of course, it is not limited to those in the above range, and other than the above as long as it is mixed in the adhesive 1A and shrinks after the adhesive 1A is cured to form a void that functions as a moisture permeable hole. It may be a thing.

  In addition, the organic polymer moisture absorbing / releasing agent 2 is added in consideration of the adhesive performance of the adhesive 1 </ b> A, the amount of voids formed after shrinkage described later, and the like. Needless to say, it is desirable to use an organic polymer moisture-absorbing / releasing agent 2 that is slower to dry and cure than the aqueous emulsion adhesive 1A.

  Subsequently, the manufacturing method of the humidity-control building material of this invention is demonstrated, referring FIG.

  First, the adhesive 13a containing the organic polymer moisture absorbent 2 is applied to the surface of the humidity control substrate 11 with a roll coater, nozzle spray, etc., and the surface layer material 12 is laminated thereon, and is integrally formed by pressing. (See FIG. 1 (a)).

  Next, the aqueous emulsion adhesive 1A in the adhesive 13a thinly stretched by pressing is dried and cured, whereby the surface layer material 12 is bonded to the humidity control substrate 11. When the aqueous emulsion adhesive 1A is cured, the organic polymer moisture absorbent 2 scattered in the adhesive 13a is in a swelled state due to slow progress of drying and curing (FIG. 1B). reference).

  Thereafter, as the drying of the organic polymer moisture absorbent 2 progresses over time, the organic polymer moisture absorbent 2 gradually shrinks due to evaporation of moisture, and the respective particles become smaller. Harden. That is, since the aqueous emulsion adhesive 1A is already cured at the stage of drying and curing of the organic polymer moisture absorbent / release agent 2, there is a cured aqueous emulsion around the shrunk organic polymer moisture absorbent / release agent 2. A gap 3 is formed so as to be surrounded by the system adhesive 1A (see FIG. 1C).

  Since the cured adhesive layer 13 is dotted with a large number of organic polymer moisture-absorbing / releasing agents 2, voids 3 formed around each of them are connected, and the humidity control substrate 11 side and the surface layer material 12 side. A fine communicating moisture permeable hole 4 is formed in communication with each other. In addition, the continuous moisture permeable hole 4 may be formed by the void 3 of one particle of the organic polymer moisture absorbent / release agent 2.

  In this way, a large number of fine communicating moisture permeable holes 4 are formed in the adhesive layer 13, and as shown by the arrows in FIG. Thereby, the humidity control function of the humidity control substrate 11 can be maintained.

  In addition, since the particle size of the organic polymer moisture absorbent / release agent 2 added to the adhesive 1A is about 0.9 to 4 μm, the generated continuous moisture permeable holes 4 have a gap size of 0. . Although it is formed as a very fine cavity of several μm or less, it is sufficient to allow water molecules to pass therethrough and has a desired moisture permeability.

  Next, the manufacturing method of the humidity control building material which is the 2nd Embodiment of this invention is demonstrated.

  In the present embodiment, a thermosetting emulsion adhesive 1B is used instead of the aqueous emulsion adhesive 1A used in the first embodiment. In addition, about the humidity control base material 11 and the surface layer material 12, since it is the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As the adhesive 13a for forming the adhesive layer 13, a thermosetting emulsion-based adhesive 1B can be used as a main material. As the thermosetting emulsion adhesive 1, for example, a thermosetting resin such as a phenol resin, a melamine resin, an epoxy resin, a urea resin, and an unsaturated polyester resin is a main component. An adhesive that adheres when a solvent such as an organic solvent is vaporized and the solute is cured is used.

  This thermosetting emulsion-based adhesive 1B is mixed so that a polymer moisture conditioner (organic polymer moisture absorbent / release agent) 2 is added and dispersed and scattered. The organic polymer moisture absorbent / release agent 2 can be the same as in the first embodiment.

  Moreover, as the organic polymer moisture absorbent / release agent 2, it is desirable to use an organic polymer moisture-absorbing / releasing agent 2 that cures more slowly than the thermosetting emulsion adhesive 1B.

  Next, the manufacturing method will be described with reference to FIG.

  First, the adhesive 13a containing the organic polymer moisture absorbent / release agent 2 is applied to the surface of the humidity control substrate 11 by a roll coater, nozzle spray, etc., and the surface layer material 12 is bonded thereto, and integrated by hot pressing. Molding is performed (see FIG. 2A).

  Next, the thermosetting emulsion adhesive 1B in the adhesive 13a thinly extended by hot pressing is cured, whereby the surface layer material 12 is bonded to the humidity control substrate 11. When the thermosetting emulsion adhesive 1B is cured, the organic polymer moisture absorbent 2 scattered in the adhesive 13a is in a swelled state due to the slow progress of drying and curing (FIG. 2 ( b)).

  Thereafter, as the drying of the organic polymer moisture absorbent 2 progresses over time, the organic polymer moisture absorbent 2 gradually shrinks due to evaporation of moisture, and the respective particles become smaller. Harden. That is, since the thermosetting emulsion adhesive 1B has already been cured at the stage of drying and curing of the organic polymer moisture-absorbing / releasing agent 2, it has been cured around the shrunk organic polymer moisture-absorbing / releasing agent 2. A space 3 is formed so as to be surrounded by the thermosetting emulsion adhesive 1B (see FIG. 2C).

  In the solidified adhesive layer 13, a large number of organic polymer moisture-absorbing / releasing agents 2 are interspersed. Therefore, the air-conditioning base material 11 side and the surface layer material 12 side are formed by the gaps 3 formed around each of them. Fine communicating moisture permeable holes 4 that communicate with each other are formed.

  In the above two embodiments, water-based (dry-curing) and heat-curing adhesives are shown as adhesives, but those having UV (ultraviolet) -curing and pressure-curing resins as the main components are used. May be used.

In addition, these humidity conditioning building materials are not limited to the above-described manufacturing method, but may be based on other methods, and at least voids are formed around the dried polymer humidity conditioning agent, and the voids are coupled. As long as the moisture permeable hole 4 communicating between the humidity control substrate 11 and the surface layer material 12 is formed.

(A)-(c) is a schematic longitudinal cross-sectional view which shows an example of the manufacturing method of the humidity control building material which is the 1st Embodiment of this invention with a humidity control building material. (A)-(c) is a schematic longitudinal cross-sectional view which shows an example of the manufacturing method of the humidity control building material which is the 2nd Embodiment of this invention with a humidity control building material.

DESCRIPTION OF SYMBOLS 10 Humidity control building material 1A Aqueous emulsion type adhesive 1B Thermosetting emulsion type adhesive 2 Polymer humidity control agent 3 Cavity 4 Moisture permeable hole 11 Base material 12 Surface layer material 13 Adhesive layer 13a Adhesive

Claims (1)

A method for producing a humidity-conditioning building material in which a base material having humidity conditioning and a surface layer material having moisture permeability are bonded with a thermosetting emulsion adhesive,
In the above thermosetting emulsion adhesive, a polymer humidity conditioner is added and mixed,
The base material and the surface layer material are bonded together and hot-pressed, whereby the thermosetting emulsion adhesive is cured, and then the polymer humidity conditioner is dried and contracted with a delay. Voids surrounded by the previously cured thermosetting emulsion adhesive are formed around the molecular humidity conditioner, and moisture permeable holes communicated between the base material and the surface layer material by these voids. A method for producing a humidity-controlled building material, wherein

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