JPH11117410A - Interior finishing decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a moisture absorbing/discharging property and converge the fluctuation width in a room caused by the temperature/humidity changes of the outside field by using a moisture absorbing/discharging resin layer extended with a resin layer dispersed with moisture absorbing/discharging material grains in one axis or two axes and forming voids at least partially between the moisture absorbing/discharging material grains for an interior finishing decorative material. SOLUTION: A resin having a moisture absorbing discharging property to some degree by itself, good familiarity with moisture absorbing/discharging material grains, and the good dispersibility of the moisture absorbing/discharging material grains, e.g. ethylene, a vinyl acetate copolymer, or its saponified material, is used. The solid moisture absorbing/discharging material grains are added to a resin layer to form a moisture absorbing/discharging resin layer 1. When the moisture absorbing/discharging resin layer 1 is extended in one axis or two axes, boundary peeling occurs due to the shearing stress between the periphery of the moisture absorbing/discharging material grains dispersed in the moisture absorbing/discharging resin layer 1 and the resin caused by extension, and voids are generated in the resin. This trimming decorative material using the moisture absorbing/discharging resin layer 1 has a good moisture absorbing discharging effect, and it can converge the fluctuation width of the relative humidity in a room caused by the temperature/humidity changes of the outside field.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic material suitably used for interiors of buildings, vehicles and the like.

[0002]

Hitherto, as a typical interior decoration material such as wallpaper, a material having a structure in which a resin layer such as a polyvinyl chloride resin layer is formed on a base material has been used. However, the decorative material having such a configuration has poor moisture absorption and desorption properties, and it is not possible to converge the change in humidity inside the building to a lesser degree with respect to changes in temperature and humidity in the outside world. Rather, the change in indoor humidity greatly increases as compared with a decorative material that is itself made of a material having moisture absorption and release properties, such as traditional wall clay and wood (particularly paulownia wood). In particular, if the humidity fluctuates in the direction of increasing humidity, not only does the discomfort index increase, but also condensation occurs on the surface of the decorative material and, if the wall is hollow, inside the hollow, causing mold and corrosion and rust on the building material. There was a problem that would occur.

The present invention has been made in view of the above-mentioned problems, and has as its object the purpose of the present invention is to have a high moisture absorption / desorption property and to converge the fluctuation range of a room due to a change in temperature and humidity in the outside world. An object of the present invention is to provide an interior decoration material that can be made to work.

[0004]

In order to achieve the above object, the interior decorative material of the present invention basically comprises a resin layer in which moisture absorbent particles are dispersed as shown in FIG. It is characterized by comprising a moisture-absorbing / releasing resin layer 1 in which a void is formed in at least a part of the periphery of the moisture-absorbing / desorbing material particles by axial stretching or biaxial stretching. Then, as shown in FIG. 2, a configuration in which the hygroscopic resin layer 1 is laminated on the base material 2 may be employed. Further, as shown in FIG. 3, the voids in the moisture-absorbing and releasing resin layer 1 may be cellular foams communicating with each other.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The resin used in the present invention includes:
At room temperature (the temperature at which the interior decoration material is used, that is, the normal indoor environment temperature. Since the temperature rises due to sunlight coming in through windows, the temperature is higher than the ambient temperature, usually up to about 80 ° C.) There is no particular limitation as long as it is a solid organic polymer substance. Usually, the typical one is ethylene
Vinyl acetate copolymer or saponified product thereof, polymethyl (meth) acrylate, polyethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth)
Acrylate / butyl (meth) acrylate copolymer,
Methyl (meth) acrylate / ethyl (meth) acrylate copolymer, 2-ethylhexyl (meth) acrylate,
Acrylic resins such as homo- or copolymers of alkyl (meth) acrylates such as β-hydroxymethyl (meth) acrylate and glycidyl (meth) acrylate (however, (meth) acrylate means acrylate or methacrylate); Polyester resins such as polyethylene terephthalate and polybutylene terephthalate,
Examples include polyethylene, polypropylene, polyolefin resins such as ethylene-propylene-butene 1 copolymer, and polyvinyl chloride. Among these resins, the resin itself has a certain degree of moisture absorption / desorption properties, is well compatible with the moisture absorption / desorption material particles, and has good dispersibility of the moisture absorption / desorption material particles, so that the amount of addition can be increased. For this reason, it is preferable to use an ethylene / vinyl acetate copolymer or a saponified product thereof.
Note that a mixed resin of an ethylene / vinyl acetate copolymer and an acrylic resin can also be used.

When the decorative material has a single-layer structure of a moisture-absorbing / releasing resin layer, these resins are formed into a film by an inflation method, a calender method, an extrusion method, a casting method, and the like, and a stretched layer is used. When the decorative material is a laminate of a base material and a moisture-absorbing and releasing resin layer, a film is formed in advance, and the stretched layer is bonded and laminated to the base material with an adhesive or heat fusion. In any case, the film-forming methods such as the inflation method and the calendering method, in which the heated molten resin containing no water is cooled and solidified to form a film, have more active water and organic components than the casting method using a coating method. The resin component and the moisture-absorbing / desorbing material particles are separated and settled before being adsorbed by the moisture-absorbing / desorbing material particles such as white clay or solidified in a paint (liquid) state, and the effect of the moisture absorbing / desorbing resin layer is reduced. This is a more preferable method because it is not performed.

These resins contain moisture absorbing / releasing material particles. If necessary, a flame retardant such as magnesium hydroxide, aluminum hydroxide, antimony trioxide or the like may be used.
Antifungal agents such as 0,10'-oxybisphenoxyarsine, antibacterial agents such as zeolite carrying silver ions, coloring agents such as dyes or pigments, additives such as heat stabilizers, plasticizers, extenders, and ultraviolet absorbers. Added.

As the moisture absorbing / releasing material, a material composed of solid particles is used. As the material, various known materials can be used. For example, inorganic materials such as activated clay (montmorillonite), ettringite, tobermorite, shells such as scallop, or organic materials such as saponified graft copolymer of starch and acrylonitrile, cross-linked polyvinyl alcohol, rice hull, wood flour, etc. Is used. The amount of the moisture absorbing and releasing material particles is about 5 to 200 parts by weight based on 100 parts by weight of the resin. Among these, activated clay (montmorillonite) is particularly preferred as the moisture absorbing and releasing material. Activated clay particles do not dissolve in or swell with water, and do not deteriorate or mold during prolonged exposure to air, and can repeat the cycle of moisture absorption and desorption. . The particle size of the activated clay used is about 0.1 to 100 μm. Further, in order to maintain the relative humidity at 40 to 60% RH, the average pore diameter is 10 to 10%.
Those having an angle of about 60 ° are good in terms of the moisture absorption / release effect.

As shown in FIGS. 1 and 2, the moisture absorbing / releasing resin layer may have a structure in which voids (or bubbles) between the resin and the moisture absorbing / releasing material formed inside by stretching are mutually independent. 3
As shown in the above, a cellular structure having a passage in which a number of internal voids communicate with each other may be used. In any case, the thickness of the moisture absorbing / releasing resin layer is usually about 50 to 300 μm. In any structure, those having a large number of voids opened on the surface have good air permeability, and therefore have good moisture absorption / release properties. That is, in such a structure, the moisture absorbing / releasing material particles are efficiently brought into contact with the outside air. In order to form a cellular structure as shown in FIG. 3, it is necessary to add a known thermal decomposition type foaming agent such as azodicarbonamide and heat-foam the formed moisture-absorbing / desorbing resin layer, and then stretch it. Alternatively, a method is used in which voids around the hygroscopic particles generated by stretching are interconnected.

[0010] The voids opening to the surface are voids communicating from the inside of the resin layer to the surface of the resin layer. It is preferable that such a plurality of voids communicate with each other and the communicating voids are distributed to the inside of the resin layer because the moisture absorption / release effect is good. Voids may communicate from the front surface to the back surface of the resin layer. In this case, particularly when the base material is a moisture-absorbing and releasing material such as paper, moisture absorption and desorption between the substrate and the outside air can also be used. Needless to say, a void that is not opened on the surface may exist in parallel with a void that is opened on the surface.

The void around the moisture-absorbing / desorbing material particles only needs to be formed at least partially around the moisture-absorbing / desorbing material particles. The diameter of the void body is usually in the range of about 1 to 1000 μm.
The void 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 void body may be a sphere, a spheroid, a polyhedron, or other various shapes. The cavity body and the wall surface of the passage are made of a resin constituting a resin layer.

The voids in the moisture-absorbing / releasing resin layer are formed by a method of uniaxially or biaxially stretching the moisture-absorbing / releasing resin layer formed in advance by the above-described method. Due to the shearing stress between the resin and the moisture-absorbing / desorbing material particles dispersed in the moisture-absorbing / desorbing resin, the interface is separated, and a part of the moisture-absorbing / desorbing material particles is exposed on the surface. And the structure as shown in FIG. Although the degree of stretching, the moisture absorption / release material is exposed on the film surface, and good moisture absorption / desorption performance is obtained, the film strength decreases, stretching unevenness, the stretch ratio is determined from the content of the moisture absorption / release material per unit volume. 1.5 to 3.0 times is preferable.

The substrate also serves as a support for the moisture-absorbing and releasing resin layer, and may be in the form of a sheet or a plate. Materials include wood, such as wood veneer, wood plywood, particle board, and wood fiber board (MDF, etc.), metals such as iron, copper, and aluminum, vinyl chloride resin, and acrylic resin.
Polyolefin resin, polyester resin, ABS resin,
There are resins such as phenolic resins, ceramics such as glass and ceramics, non-ceramic ceramic materials such as gypsum, calcium silicate and cement, papers, fabrics and nonwoven fabrics.

In particular, when the interior decorative material is used as a sheet (decorative sheet) for wallpaper or the like, the substrate has a basis weight of 20%.
It is preferable to use a paper such as high-quality paper, thin paper, backing paper for wallpaper, Japanese paper or the like of about 120 g / m ² , or a 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.

In the case of using a material such as paper or wood which has a moisture absorbing / releasing property or a water permeable property, the moisture adsorbed by the moisture absorbing / releasing resin layer passes through the substrate and is applied to the back surface (for example, inside the wall). May penetrate. In some cases, the back surface may be moistened, warped, corroded, or moldy or rusted due to moisture permeating the back surface. Therefore, when it is necessary to prevent this phenomenon, polyethylene, polypropylene,
It is preferable to form a moisture-proof / water-proof layer such as polyvinylidene chloride and silica-deposited polyethylene terephthalate. FIG. 4 shows an example of an interior decorative material in which a moisture-proof / water-proof layer 3 of this type is formed on the back surface of a base material 2. The thickness of the moisture-proof / waterproof layer 3 is about 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. .

If necessary, a decorative layer may be provided on the surface of the moisture-absorbing / desorbing resin layer (or on the back surface if the resin layer is transparent) as long as the moisture-absorbing / desorbing property is not impaired. As the decorative layer, for example, there are a picture print layer provided by a known ink and printing method, a metal thin film layer of aluminum or the like. In this case, it is preferable to provide a part instead of the entire surface. In addition, a decorative effect can be obtained by adding a known dye or pigment to the inside of the resin layer and coloring the resin layer within a range that does not impair the moisture absorption / release properties. Alternatively, the surface of the resin layer may be embossed with a concavo-convex pattern, or the embossed concave portions may be filled with a coloring ink by a wiping method and colored.

The cosmetic material of the present invention can be used for walls,
Architectural interior materials such as floors and ceilings are typical.In addition, interior materials for vehicles such as cars, trains, ships, and aircraft, doors, sliding doors,
It is also used for window frames, fittings such as handrails, furniture such as chests, partitions, containers and the like.

[0018]

【Example】

(Example) A compound having the following composition A containing a moisture absorbing / releasing material was used, and was extruded at an extrusion temperature of 1 by an inflation method.
A film was formed at 80 ° C. to a thickness of 80 μm to obtain a film. Next, the obtained film was stretched at a stretching temperature of 50 ° C. and a stretching ratio of 2
Uniaxially stretched by a factor of 2 to expose part of the moisture absorbing and releasing material to the surface,
In addition, a moisture absorbing / releasing wall material sheet having voids around the moisture absorbing / releasing material particles was manufactured.

<Composition A> Hygroscopic material: Activated clay ("Galeon Earth V 2R" manufactured by Mizusawa Chemical Co., Ltd., average particle diameter 20 μm, average pore diameter 25 mm) 53 parts by weight Resin: low-density polyethylene 45 parts by weight Foaming Inhibitor: calcium oxide 2 parts by weight Antioxidant 0.1 part by weight Dispersant 1 part by weight

(Comparative Example) Using a compound having the same composition as that used in the examples, a film having a thickness of 80 μm was formed at an extrusion temperature of 180 ° C. by an inflation method to obtain an unstretched film.

The humidity control performance of each wall material sheet obtained in the example and the comparative example was compared. Specifically, inside size 25cm
A cubic aluminum case of × 25 cm × 25 cm is prepared, a wall material sheet cut to a size of 25 cm × 25 cm is attached to the inner wall surface of the aluminum case, and kept at an initial set temperature and humidity (20 ° C., 50% RH). After quantification, the aluminum case is sealed and the outside air temperature is set to 20 ° C.
For 0.5 hour, 30 ° C for 2 hours, 20 ° C for 2 hours, 10
The temperature was changed in a cycle of 2 hours at 2 ° C., and the change in relative humidity in the aluminum case was measured. The results obtained are shown in FIG. As can be seen from the graph of FIG. 5, when the wall material sheet of the comparative example was used, the relative humidity fluctuated in a range of + 6% and -9% (a fluctuation range of 15%) with respect to the initial set humidity of 50%. The degree of use of the wall material sheet of the embodiment was such that the relative humidity was in a range of approximately + 1% and -8% with respect to the temperature change (variation range 9
%), And an excellent humidity control effect was recognized.

[0022]

As described above, the interior decorative material of the present invention has a good moisture absorption / release effect, and can focus on the fluctuation range of the relative humidity in the room due to the temperature and humidity of the outside world.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a decorative material according to the present invention.

FIG. 2 is a sectional view showing another example of the decorative material according to the present invention.

FIG. 3 is a sectional view showing still another example of the decorative material according to the present invention.

FIG. 4 is a cross-sectional view showing an example of a decorative material having a moisture-proof / water-proof layer formed on the back surface of a base material.

FIG. 5 is a graph comparing the humidity control performances of the examples.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Moisture absorption / release resin layer 2 Base material 3 Moisture / waterproof layer a Moisture absorption / release material particles

──────────────────────────────────────────────────の Continuation of front page (51) Int.Cl. ⁶ Identification code FI B32B 27/18 B32B 27/18 Z 33/00 33/00 D06M 15/00 D06M 15/00 D21H 19/38 E04F 13/00 B E04F 13/00 13/08 V 13/08 D21H 1/22 B // B29K 7:00

Claims (2)

[Claims] 1. A moisture-absorbing / releasing resin formed by uniaxially or biaxially stretching a resin layer in which moisture-absorbing / desorbing material particles are dispersed to form voids in at least a part of the periphery of the moisture-absorbing / releasing material particles. An interior decorative material comprising a layer. 2. An interior decorative material comprising the moisture-absorbing and releasing resin layer according to claim 1 laminated on a substrate.