JP2002036449A - Moisture absorbable and dischargeable decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moisture absorbable and dischargeable decorative material capable of converging a change width of a humidity in association with outdoor temperature and humidity changes with high moisture absorbability and dischargeability and having an easy manufacture and stable quality. SOLUTION: The moisture absorbable and dischargeable decorative material 1 comprises a moisture absorbable and dischargeable resin layer 3 made of a polyolefin resin containing a diatomaceous earth and provided on a base 2 by melt extruding, laminating and adhering.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-absorbing and decorative material used as an interior decorative material for houses and the like.

[0002]

2. Description of the Related Art Since a conventional interior decorative material does not have a humidity adjusting effect, if the indoor relative humidity rises due to a change in outdoor temperature and humidity, dew condensation on the surface of the decorative material and furthermore due to the condensation. Generation of mold, mites, corrosion of building materials, rust,
Or, there is a concern that the fluctuation of the humidity in the house may affect the health condition of a person.

[0003] Therefore, as described in Japanese Patent Application Laid-Open No. 11-207853, a cosmetic material is proposed in which a moisture absorbing / releasing resin layer in which diatomaceous earth is added as a moisture absorbing / releasing material to an emulsified binder resin is coated on a substrate. Have been.

[0004]

However, in the above-mentioned cosmetic materials, if diatomaceous earth is added in an amount of 100 parts by weight or more in order to obtain a sufficient moisture absorbing and releasing effect, the emulsion thickens at the time of film formation and coating suitability deteriorates. Diatomaceous earth has been found to cause separation and sedimentation. In addition, there is a problem in that polyolefin resins are limited to ethylene-vinyl acetate copolymers as resins which can be emulsified.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a high moisture absorption / desorption property, and can converge a fluctuation range of humidity accompanying a change in temperature and humidity in the outside world. It is an object of the present invention to provide a moisture-absorbing and releasing cosmetic material of easy and stable quality.

[0006]

The present invention is characterized in that a moisture absorbing / releasing resin layer made of a polyolefin resin containing diatomaceous earth is melt-extruded on a substrate and laminated and bonded. The present invention provides a moisture-releasing cosmetic material.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the moisture absorbing and releasing cosmetic material 1 of the present invention
Is obtained by laminating and adhering a hygroscopic resin layer 3 made of a polyolefin resin 3b containing diatomaceous earth 3a on a base material 2 by melt extrusion.

The substrate 2 serves as a support for the moisture-absorbing and desorbing resin layer 3 and can be used as a substrate for a decorative material. The shape may be a sheet shape or a plate shape. Materials include wood such as cedar, pine, oak, oak, lauan, teak, etc., wood veneer, wood plywood, particle board, wood fiberboard (MDF) and other metals, metals such as iron, copper, and aluminum. Non-porcelain ceramic materials, paper, fabrics, such as resins such as polyvinyl chloride, polyvinyl chloride, acrylic resin, polyolefin resin, polyester resin, ABS resin, and phenol resin, ceramics such as glass and ceramics, gypsum, calcium silicate, and cement , And non-woven fabrics.

When the moisture-absorbing and releasing cosmetic material 1 is used as a sheet (decorative sheet) such as a wallpaper, the basis weight of the base material is 20 to
It is preferable to use paper such as high-quality paper, thin paper, kraft paper, backing paper for wallpaper, Japanese paper, etc. of about 120 g / m ² , or woven or non-woven fabric made of fibers such as glass fiber, asbestos, polyester fiber, and vinylon fiber. In the case of paper, a flame retardant such as aluminum hydroxide powder may be added.

When a moisture-absorbing and releasing material such as paper and wood is used as the base material 2, the moisture-absorbing and releasing resin layer 3
The moisture adsorbed on the substrate may pass through the base material 2 and penetrate into the back surface (for example, the inside of a wall). In some cases, the moisture permeating the back surface may cause the rear surface to become moist, warp, or generate mold and rust. Therefore, in order to prevent this phenomenon, a moisture-proof / water-proof layer can be laminated on the back surface side of the base material 2 (the surface opposite to the moisture-absorbing and releasing resin layer).

The moisture-proof / water-proof layer may be laminated on the front side of the base material 2 (on the moisture-absorbing / release resin layer 3 side) or on both front and back surfaces. The moisture-proof / water-proof layer may be made of a moisture-proof or waterproof material such as polyethylene, polyvinylidene chloride, or silica-deposited polyethylene terephthalate. The thickness of the moisture-proof / waterproof layer is preferably 30 to 100 μm, and is formed by bonding with an adhesive such as a two-component curable urethane resin, or by applying by a melt extrusion method (extrusion coating method) or the like. Can be.

The resin 3b of the moisture absorbing / releasing resin layer 3 serves as a binder for holding diatomaceous earth as a moisture absorbing / releasing material to form a layer, and a polyolefin resin is used. Specifically, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-propylene copolymer, ethylene-propylene-butene copolymer, polybutene, polyisobutylene, polyethylene, polypropylene, polyisoprene or these And copolymers of one or more of the ethylenically unsaturated monomers. The thickness of the hygroscopic resin layer 3 is preferably about 50 to 200 μm.

As shown in FIG. 2, for example, the moisture-absorbing and desorbing resin layer 3 supplies a sheet-like base material 2 and places the base material 2 between the impression cylinder 4 and the cooling roll 5. A composition 6 obtained by adding diatomaceous earth to a polyolefin-based resin is heated and melted, and extruded from a T-die 7 to form a film to form a moisture-absorbing and desorbing resin layer 3. Cooling while in contact with the substrate, and peeling from the cooling roll 5 by the peeling roll 8, the moisture absorbing / releasing resin layer 3 and the substrate 2
And glue them together.

Improve the adhesive strength between the base material 2 and the moisture absorbing / releasing resin layer 3
For this purpose, use the following means (a) to (c) as necessary.
Can be. (a) The surface of the extruded moisture-absorbent resin layer 3 on the base material 2 side (adhesion side)
Ozone spraying treatment or corona discharge treatment
Hydroxyl group, carboxyl group, carbon
A polar functional group such as a hydroxyl group. (b) Chlorinated polypropylene is provided on the moisture absorbing / releasing resin layer 3 side of the base material 2.
Adhesives, such as urethane resin and epoxy resin
A layer is formed in advance. The coating amount of the adhesive layer is 5 ~ 20g / m ^TwoAbout
Degree. (c) The above (a) and (b) are used in combination.

Further, in order to promote the cooling and solidification and adhesion of the moisture-absorbing and desorbing resin layer 3 extruded onto the substrate 2, the surface of the moisture-absorbing and desorbing resin layer 3 extruded by the cooling roll 5 is pressed as shown in FIG. Is preferred. The cooling roll 5 is usually made of a metal cylinder, such as iron or copper, having excellent thermal conductivity and high mechanical strength. To further increase the cooling efficiency, the inside of the cooling roll may be hollow, and cooling water may be passed through the hollow part. Also, by forming a desired uneven shape (uneven pattern) on the surface of the cooling roll 5, it is possible to emboss the desired uneven pattern on the surface at the same time as forming and laminating the moisture-absorbing and releasing resin layer 3. I can do it. The irregular pattern may be any of a grain pattern, a satin pattern, a hairline, a wood grain conduit groove, a granite cleavage plane, a skin squeezing surface, a joint groove for tiled or brickwork, and the like. Of course, when an uneven pattern is not desired, the surface of the cooling roll 5 is mirror-finished.

Diatomaceous earth 3a, which is used as a moisture absorbing and releasing material for the moisture absorbing and releasing resin layer 3, is a hydrated colloidal silicic acid and is a kind of protein stone, and is formed by depositing diatom remains on the sea floor.
In addition to diatoms, it includes radiolarians, sponges thorns, lime grains, and the like. Generally, the specific gravity is about 2.0, and the hardness is high, similar to clay.
Diatomaceous earth has pores inside, and keeps moisture (moisture) in the pores depending on the humidity of the atmosphere, or releases moisture from the inside of the pores to act as a moisture absorbing and releasing agent, and Changes can be converged. The humidity in the present invention refers to relative humidity. Diatomaceous earth does not dissolve in water or swell with water, and even if exposed to air for a long period of time, does not deteriorate or produce mold, and can repeat the cycle of moisture absorption and desorption well. it can.

The average particle size of the diatomaceous earth used is 0.1 to 100 μm.
m is preferred. In addition, the average pore diameter of diatomaceous earth
2 to 6 nm is preferable in order to keep it at ~ 60%, and the specific surface area is 100
m ² / g or more is preferable. The diatomaceous earth is concretely produced from various places mined in Wakkanai, Akita, Okayama, Ishikawa, Oita, etc. Among them, diatom shale from Wakkanai is preferably used. The diatom shale from Wakkanai has a pore volume with a pore radius of 2 to 8 nm occupying more than 70% of the total pore volume, and its pore volume is also large.

The amount of diatomaceous earth to be added depends on the polyolefin resin
The amount is preferably 5 to 200 parts by weight, more preferably 30 to 150 parts by weight, per 100 parts by weight. If the amount of diatomaceous earth added is less than 5 parts by weight, the effect of absorbing and releasing moisture is insufficient for practical use in converging the humidity change with the temperature change of the normal indoor atmosphere. In addition to the saturation of the moisture absorbing / releasing effect, there is a possibility that the strength of the moisture absorbing / releasing resin layer is reduced and the film formation is also difficult.

The moisture-absorbing and desorbing resin layer 3 may include a flame-retardant material such as magnesium hydroxide or aluminum hydroxide, if necessary.
Adds fungicides such as 10'-oxybisphenoxyarsine, antibacterial agents such as zeolite carrying silver ions, coloring agents such as dyes or pigments, heat stabilizers, plasticizers, and additives such as extender pigments and ultraviolet absorbers. can do.

The moisture-absorbing / releasing resin layer 3 may be constituted as a non-foamed body containing no bubbles therein, or may be a cellular foam having a large number of bubbles inside. When the moisture-absorbing / desorbing resin layer 3 is a cellular foam and has a large number of cavities opened on the surface, the air permeability is good, and therefore, the moisture absorbing / desorbing property is good. That is, in the cellular foam as described above, the contact of the diatomaceous earth, which is a moisture absorbing and releasing agent, with the outside air,
This is because it is performed efficiently.

The cavity opened on the surface of the foam is a cavity communicating from the inside of the resin layer to the surface of the resin layer. Such cavities communicate with each other,
It is preferable that the communicating cavities are distributed to the inside of the resin layer because the moisture absorption / release effect is good. Further, a cavity may be communicated from the front surface to the back surface of the resin layer.
In particular, when the decorative material base material is a moisture absorbing and releasing material such as paper, moisture absorption and release from the decorative material substrate side can also be used. Of course, cavities that do not open on the surface may exist in parallel with cavities that open on the surface.

The diameter of the hollow body is usually in the range of about 10 to 100 μm. The hollow body may be directly opened on the surface of the resin layer, or may be connected to the surface of the resin layer by a passage. The diameter of the passage is also in the same range as the diameter of the cavity body. The shape of the cavity body may be a sphere, a spheroid, a polyhedron, and various other shapes. The walls of the cavity body and the passage are made of a binder resin.

As a method of forming a cellular foam,
A typical method is to heat the composition in which a foam is added to the above resin to foam the composition. As the foaming agent, the following compounds (1) to (3) are used. (1) Acrylic nitrile, vinylidene chloride, in a resin hollow body such as vinylidene chloride-acrylonitrile copolymer,
A microcapsule-type foaming agent containing a volatile and thermally expandable substance such as butane, hexane, and pentane. (2) azodicarbonamide, azobisisobutyronitrile, 4-4′-oxybisbenzenesulfonyl hydrazide,
NN-dinitrosopentamethylenetetramine, ammonium bicarbonate, ammonium carbonate, sodium bicarbonate,
And pyrolytic foaming agents such as sodium boron hydride.
If necessary, foaming accelerators such as metal soaps such as lead, calcium and tin, dibasic lead sulfite, tribasic lead and zinc white are added. (3) A mixture of the above (1) and (2).

The amount of the foaming agent is usually 1 to 10 parts by weight based on 100 parts by weight of the binder resin. By adding a relatively large amount of a pyrolysis type foaming agent or adding a surfactant to the resin, a cavity opened on the surface can be formed.

The decorative material may be provided with a decorative layer on the surface of the moisture-absorbing / desorbing resin layer 3 (if the resin layer is transparent, the back surface is also possible) as long as the moisture-absorbing / desorbing property is not impaired. good.
Examples of the decorative layer include a picture print layer provided by a known ink and a printing method, and a metal thin film layer of aluminum, chromium, or the like. In this case, it is preferable to provide the partial area instead of the entire area. The pattern may be any of a wood grain pattern, a stone grain pattern, a cloth grain pattern, a leather squeezing, a tile application, a brickwork, a character, a geometric figure, and the like. As the ink binder, a two-component curable urethane resin, chlorinated polypropylene, or the like is used. Ink colorants include red pigment, graphite, ultramarine blue, carbon black, titanium white, aluminum foil powder, titanium dioxide-coated mica, inorganic powders such as foil powder, polyazo red,
Organic pigments such as quinacridone red, benzidine yellow, isoindolinone yellow, and phthalocyanine blue are used.

The decorative material can also be provided with a decorative effect by adding a known coloring agent such as a dye or pigment to the interior of the resin layer within a range that does not impair the moisture absorption and release properties. . Further, the surface of the moisture-absorbing / releasing resin layer may be embossed with a concavo-convex pattern by the above-mentioned method, or the concave portion of the emboss may be filled with a coloring ink by wiping to be colored.

The moisture-absorbing and releasing cosmetic material of the present invention is typically used for interior materials of buildings such as walls, floors and ceilings, and in addition to vehicles, such as automobiles, trains, ships, and aircraft. It is also used for interior materials, doors, fusuma, window frames, fittings such as handrails, furniture such as chests, partitions, containers and the like.

[0028]

EXAMPLES Example 1 Flame-retardant backing paper “E-140RS” (Kishu Paper Co., Ltd., basis weight 140 g / m ² )
Diatomaceous earth with an average particle diameter of 20 μm and an average pore diameter of 6 nm (Suzuki Sangyo
The melt extrusion of Co. The olefin thermoplastic elastomer resin having the following composition added with "Wakkanai diatomaceous shale") from the T-die, and laminated in a coated amount of 100 g / m ² (Figure 2). Then, foaming was performed in a heating foaming furnace at 220 ° C. for 1 minute to obtain a wall material sheet having moisture absorption / release properties. Neither did the sedimentation and sedimentation of diatomaceous earth occur, the surface of the moisture-absorbing and releasing resin layer was flat, and no streak or fish-eye-like defects occurred. [Olefin-based thermoplastic elastomer resin composition]-Binder resin: 100 parts by weight of low-density polyethylene resin-Microcapsule type foaming agent: 12 parts by weight of Matsumoto Yushi Co., Ltd. "F-85"-Pigment: titanium oxide powder (white pigment) 19 parts by weightLight stabilizer: hindered amine radical scavenger 0.5 parts by weightHygroscopic material: diatomaceous earth (as above) 100 parts by weight

Comparative Example 1 Flame-retardant backing paper "E-140RS" (Kishu Paper Co., Ltd., basis weight 140 g / m ² )
An olefin-based thermoplastic elastomer resin having the following composition was laminated thereon at a coating amount of 100 g / m ² by a T-die extrusion method. Next, foaming was performed in a heating foaming furnace at 220 ° C. for 1 hour to obtain a wall material sheet. [Olefin-based thermoplastic elastomer resin composition]-Binder resin: 100 parts by weight of low-density polyethylene resin-Microcapsule type foaming agent: 12 parts by weight of Matsumoto Yushi Co., Ltd. "F-85"-Pigment: titanium oxide powder (white pigment) 19 parts by weightLight stabilizer: hindered amine radical scavenger 0.5 part by weight

Comparative Example 2 Flame-retardant backing paper "E-140RS" (Kishu Paper Co., Ltd., basis weight 140 g / m ² )
The aqueous emulsion composition of the following composition was coated by a comma coater on, then heated for 2 minutes in a 120 ° C. atmosphere, is dried and solidified, the coating film of the coated amount 100 g / m ^2, further 1 in 170 ° C. atmosphere
After heating for 1 minute, the coating film was foamed to form a moisture-absorbing and releasing resin layer. However, the diatomaceous earth gradually settled in the paint storage tank during the application of the emulsion, and stable application was difficult. In addition, a streak-like and fish-eye-like defect was partially observed on the coating film. [Aqueous emulsion composition]-Binder resin: ethylene-vinyl acetate copolymer resin (100 parts by weight of "BE-920" manufactured by Chuo Rika Chemical Industry Co., Ltd.)-Microcapsule type foaming agent: 14% by weight of Matsumoto Yushi "F-85" Parts ・ Dispersant: 4 parts by weight of polycarboxylic acid ・ Defoaming agent: 4 parts by weight of non-silicone ・ Hygroscopic material: diatomaceous earth (average particle diameter 20 μm, average pore diameter 6 nm, Suzuki Sangyo Co., Ltd. Shale '' 100 parts by weight

[Test of Humidity Adjusting Effect] The humidity control performance (humidity adjusting effect) of the sheets of Example and Comparative Example was compared by the following method. After bonding the above-mentioned sheet 25cm x 25cm, each one sheet to the inner wall surface of the aluminum case of inner size 25cm x 25cm x 25cm, respectively, in the aluminum case, the initial set temperature and humidity are constant at 20 ° C and 50% RH. Then, the aluminum case was sealed, and the outside air temperature was changed at a cycle of 0.5 hours at 20 ° C., 2 hours at 30 ° C., 2 hours at 20 ° C., and 2 hours at 10 ° C., and the change in humidity in the aluminum case was measured. FIG. 3 shows the measurement results. As shown in FIG. 3, it was confirmed that the example 1 had a smaller fluctuation range of the humidity than the comparative example 1.

[0032]

According to the conventional interior decorative material, the humidity change in the room is very large with respect to the change in the temperature and humidity in the outside world. In addition to having a moisture control effect, a wide range of polyolefin resins with excellent water resistance and other properties can be used as the binder resin, and even if 100 parts by weight of diatomaceous earth is added, separation and sedimentation and poor film formation are unlikely to occur. Can be sufficiently stabilized. Further, a cosmetic material having an excellent appearance can be obtained without causing streak-like or fish-eye-like defects on the surface of the moisture-absorbing and releasing resin layer.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a moisture absorbing and releasing cosmetic material of the present invention.

FIG. 2 is an explanatory diagram of a method for producing a moisture-absorbing and releasing cosmetic material of the present invention.

FIG. 3 is a graph showing the results of a humidity adjustment effect test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Moisture-absorbent cosmetic material 2 Base material 3 Hygroscopic resin layer

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) E04B 1/64 E04B 1/64 D // B29K 23:00 B29K 23:00 105: 16 105: 16 B29L 9:00 B29L 9:00 31:58 31:58 F-term (reference) 2E001 DA01 DB03 FA03 GA03 GA24 GA28 GA42 GA85 HA01 HA03 HA11 HA14 HA21 HB02 HB04 HB05 HC01 HC02 HC04 HC07 HC11 HD11 HD13 JA03 JA06 JA22 JB03 JD04 LA04 4F100 AA21 AA21H AC10B AC10A ACH AH03H AK03B AK06 AK62B AK66B AT00A BA02 CA01 CA05 CA13 DG10 DJ01 EH23B GB08 HB00 JD15 JD15B JD16 JD16B JL02 JL07 4F207 AA03 AA07 AB02 AB12 AB16 AG03 AH48 KA01 KA11 KA17 KB13 KF

Claims (1)

[Claims] 1. A moisture-absorbing and moisture-absorbing decorative material characterized in that a moisture-absorbing and releasing resin layer made of a polyolefin resin containing diatomaceous earth is melt-extruded, laminated and adhered on a substrate.