JP2002337301A - Humidity adjustable building material coated with decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a humidity adjustable building material coated with a decorative sheet which has a natural wood appearance and moisture absorption/ desorption properties equivalent to or higher than a Japanese cedar material and is excellent in fire resistance and fireproof properties. SOLUTION: In the humidity adjustable building material coated with the decorative sheet, the decorative sheet of moisture permeability >=1000 g/m<2> ×24 h is stuck on a base material comprising a moisture absobable/desorbable material 100 μm in particle size and a hydraulic substance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a decorative sheet covering moisture-absorbing and releasing property equal to or higher than that of cedar lumber and having fire resistance and fire resistance, and which can be used as a ceiling material, an interior material and the like. Concerning building materials.

[0002]

2. Description of the Related Art Conventionally, in the construction of houses and the like, an architectural style in which wood is used as an earth wall structure and wood-based building materials obtained by processing the same are used. A house having such a structure has an excellent humidity control ability capable of preventing the occurrence of dew condensation and extreme drying in a living space due to the excellent moisture absorbing and releasing ability of earth walls and wood-based materials.

However, in recent years, it has become difficult to obtain good-quality wood-based materials due to the depletion of wood-based resources, and prices have continued to rise. On the other hand, a wood-based building material is a flammable material and has the drawbacks that it is easily attacked by pests such as termites and it is easy to cause corrosion.

On the other hand, with respect to the earth wall structure, the number of skilled and highly skilled workers has become extremely small, and the earth wall has hardly been adopted due to a rise in labor costs.

[0005]

In recent years, houses and the like have been pursued with a structure that is highly airtight and highly heat-insulating.
Moisture generated indoors cannot diffuse to the outside and dew condensation occurs throughout the room, causing wetting and stains, and causing problems such as mites and molds. Conventionally, as means for comfortably utilize living space, but the air conditioning equipment to control the temperature and humidity it has been utilized, leading to CO ₂ generation of the power plant consumes a lot of electric energy, the reduction of CO ₂ generation The above problem occurs when the air conditioner is not operated not only because of the backward movement but also because the resident is absent.
In order to solve such a problem, it has been strongly desired to provide a building material such as a board having excellent moisture absorption / release properties.

[0006] The present invention, while having the appearance of natural wood,
It is an object of the present invention to provide a decorative sheet-covered moisture-regulating building material having a moisture absorption / desorption property equal to or higher than cedar lumber products and having excellent fire resistance and fire resistance.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for manufacturing a base material comprising a moisture-absorbing / desorbing material having a particle size of 100 μm or less and a hydraulic substance, with a moisture permeability of ≧ 1000 g / m ^2.
It is a decorative sheet-covered humidity-control building material to which a decorative sheet of 24 hrs is stuck.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on preferred embodiments.

The moisture-controllable building material covered with a decorative sheet according to the present invention is kneaded by adding 10 to 20 times by weight of water to a mixed raw material of a hygroscopic material having a limited particle size and a hydraulic substance. It is manufactured by adhering a breathable decorative sheet to a humidity-controlling substrate obtained by making the slurry thus obtained. As a papermaking method for obtaining a humidity-controlling substrate, a papermaking method using a well-known round-mesh paper machine can be used.

[0010] The component system of the base material in the decorative sheet-covered humidity control building material of the present invention will be described below. The substrate in the decorative sheet-covered humidity control building material of the present invention is basically
It consists of a hygroscopic material with a limited particle size and a hydraulic substance.

The moisture-absorbing and desorbing materials in the base material of the decorative sheet-covered humidity control building material of the present invention include diatomaceous earth, zeolite,
Zonotolite, sepiolite, apattalite, calcium silicate, allophane, white sand (whitebait), kaolinitic clay, aluminum oxide, charcoal, activated carbon and the like can be used. These are all porous and have excellent moisture absorption / release properties.

The moisture-absorbing and desorbing material in the base material of the decorative sheet-covered moisture-controllable building material of the present invention is expressed by weight (hereinafter, referred to as “weight”) in the compounding material.
the same. ) Is added in the range of 2% to 50%. If the addition amount is less than 2%, the desired moisture absorption / release properties cannot be imparted to the decorative sheet-covered moisture-controllable building material. On the other hand, an addition amount exceeding 90% lowers the hardness and flexural strength, especially the primary physical properties of the decorative sheet-covered humidity-control building material. Preferably, 5% to 45
%.

[0013] In the base material of the decorative sheet-covered humidity control building material of the present invention, the particle size of the hygroscopic material is limited to 100 µm or less. When the particle size exceeds 100 μm, when the blended raw material slurry is wound up by a papermaking machine, the hygroscopic material is separated and a uniform mat cannot be formed. Usually, particle size ≦ 7
Perform at 0 μm. The particle size range of the hygroscopic material is preferably 10 μm to 50 μm.

By adding the hydraulic substance, the matrix can be firmly adhered to enhance the strength of the base material of the decorative sheet-covered humidity control building material, and it can impart properties such as curing and molding easily and inexpensively. It facilitates the production of a base material for a sheet-covered humidity control building material. Further, the hydraulic substance has fire resistance, fire resistance and waterproofness. As the hydraulic substance, slag, cement, gypsum, calcium carbonate, magnesium carbonate, calcium silicate and the like can be used.

In the present invention, the hydraulic substance is 10%
It is blended within the range of ~ 98%. When the amount is less than 10%, it is difficult to exhibit strength imparting ability, waterproofness, curing properties, and molding properties. On the other hand, if the content is more than 98%, the base material of the decorative sheet-covered humidity control building material increases in weight and cracks due to drying and shrinkage are caused.

In the present invention, the following substances can be blended as extenders in the base material of the decorative sheet-covered humidity control building material. That is, gypsum: 2% to 30%, calcium carbonate: 5% to 20%, pearlite: 10% to 15%
%, Slaked lime: 1% to 1.5%, mica: 1% to 8%.

Gypsum has fire-resistance and fire-resistance, has a small amount of expansion and contraction caused by a temperature change, and has the advantages of being easily cured and formed. It has long been used as a fire-resistant material and a fire-resistant material. However, gypsum alone has drawbacks in that, even if it has primary physical properties, the bending strength is low and the screw nail holding force is weak. In the present invention, this point is complemented by the addition of the organic reinforcing fiber and the hydraulic substance.

Gypsum is added in an amount of 2% to 30%. Gypsum also has the effect of accelerating the hardening of hydraulic substances such as slag and cement by hydration, but the addition effect is less likely to be exhibited with an addition amount of less than 2%. On the other hand, if it is added in excess of 30%, the strength imparting ability of a hydraulic substance such as slag and cement and the properties such as waterproofness, curability and moldability are reduced. In addition, the primary physical properties decrease bending strength and screw nail holding power.

Calcium carbonate is conventionally used as a main raw material of Portland cement, but in the present invention, it is used as an extender and is added in the range of 5% to 20%. If the addition amount is less than 5%, the effect of addition is small.
If the amount exceeds 0%, the weight of the product increases.

Perlite increases the fire resistance of the product and
It is also added as a lightweight aggregate for the purpose of reducing the weight of the base material of the decorative sheet-covered humidity control building material. If it is added in excess of 15%, the balance between the moisture absorption / release properties of the base material of the decorative sheet-covered moisture control building material and the primary physical properties is impaired.

Organic reinforcing fibers are added in order to improve the strength of the base material of the decorative sheet-covered humidity control building material and also to improve the papermaking property and workability. Pulp, vinylon and the like can be used as the organic reinforcing fibers. In the present invention, it is added within a range of 3% to 5%. If the addition amount is less than 3%, the effect of improving the strength, papermaking property, and workability of the base material of the decorative sheet-covered humidity control building material cannot be exhibited. On the other hand, if the addition amount exceeds 5%, the characteristics of the base material of the decorative sheet-covered humidity control building material as a non-combustible material are lost from the place where pulp or the like is an organic material.

Inorganic fibers such as rock wool, like organic reinforcing fibers, are added to improve the strength of the base material of the decorative sheet-covered humidity control building material and to improve the processability. In the present invention, it is added within the range of 1% to 8%. If the addition amount is less than 1%, only a small portion contributes to the improvement of the strength of the base material of the decorative sheet-covered moisture-control building material.
%, The kneading operation is hindered, and fiber agglomerates called lumps coexist, thereby impairing the uniformity of the material of the base material of the decorative sheet-covered moisture-control building material.

In the present invention, one or both of the organic reinforcing fiber and the inorganic fiber are added.

Next, the decorative sheet in the decorative sheet-covered humidity control building material of the present invention will be described. It is an essential characteristic of the moisture-controllable building material coated with a decorative sheet of the present invention that it has excellent moisture absorption and desorption properties. Therefore, the decorative sheet coated on the substrate must also have excellent air permeability. In the present invention, moisture permeability by moisture permeability measurement method specified in JIS A 1324 of at least 1000g ^/ m 2 · 24hrs
Is applied to the base material. Preferably, a moisture permeability ≧ 2000g ^/ m 2 · 24hrs.

As such a decorative sheet, a base color of the wood is first printed on a base paper for building material with a nitrocellulose (nitrified cotton) based synthetic resin ink having air permeability, and the wood color is printed on the base color printing layer. Pattern printing is performed, and a coating resin layer is further formed thereon. The coating amount of the coating resin is such that the resin solid content is about 2 g / m ² .

In the production process of the decorative sheet-covered moisture-control building material of the present invention, starch and vinyl acetate are cross-linked with a cross-linking agent to enhance the water-resistance effect in order to form a decorative sheet layer having air permeability on the surface of the base material. Adhesive is used. In addition, it is also possible to apply a bonding agent after forming a sealer layer that does not easily impair the air permeability on the surface of the base material, and attach a decorative sheet.

[0027]

EXAMPLES Example 1 By weight, gypsum dihydrate: 16.5%, blast furnace slag: 40%,
Cement: 3%, perlite: 12%, diatomaceous earth: 20%
(Average particle size: 30 μm) Pulp: 5%, rock wool:
To a raw material composition having a composition of 3% and a coloring pigment: 0.5%, water was added 15 times as much as the raw material composition and kneaded, and the resulting slurry was formed using a round mesh type paper making machine at a paper making speed of 40 m. Per minute to obtain a mat, and then the temperature was increased stepwise to around 70 ° C., followed by steam (90% RH) curing at a temperature of 70 ° C. for 20 hours. Thereafter, natural curing was performed for 100 hours. After that,
After drying at 180 ° C. for 10 minutes in a dryer, cutting is performed to obtain a thickness: 6 mm, a width: 910 mm,
A moisture control substrate having a length of 1820 mm was obtained.

The resulting substrate was tested for humidity control. The result is shown in FIG. As is clear from FIG. 1, the base material in the decorative sheet-covered moisture-controllable building material of the present invention has an excellent moisture absorbing / releasing ability as compared with a cedar lumber product.

As a decorative sheet to be adhered to the surface of the base material, a nitrocellulose (nitrified cotton) synthetic resin and an ink composed of organic and inorganic pigments were first used on a base paper having a basis weight of 30 g / m ² , The base color is solid-colored and printed, and the woodgrain pattern printing is performed on the woodgrain base color print layer. Further, a coat resin containing an acrylic urethane-based synthetic resin, an extender pigment, and silicone oil is solid-coated at 2 g / m2.
^Two coated ones were used. The moisture permeability of this decorative sheet is
2500g ^/ m was 2 · 24hrs.

The above decorative sheet was prepared by mixing starch / vinyl acetate paste (solid content: 20% by weight) with a crosslinking agent in a ratio of starch / vinyl acetate paste / crosslinking agent = 100/5 by weight. After applying 0.5 g / scale ² and leaving for 7.5 minutes (open time), pressure: 7.5 kgf / cm ² , temperature:
It pressed under the conditions of normal temperature and holding time: 2 minutes. After that, 3
After leaving (curing) indoors for a period of time, drying was performed at 60 ° C. for 2 hours.

The humidity control of the decorative sheet-covered humidity control building material thus obtained was tested. The sample is 250 mm thick at 6 mm.
The four sides of the test piece having a square dimension of mm were masked with a Teflon (registered trademark) sheet and an aluminum pressure-sensitive adhesive tape. The test conditions were as follows: a test sample cured at 25 ° C. in a 50% RH (relative humidity) atmosphere at 25 ° C. for 48 hours in a constant temperature and humidity chamber at 90 ° C. at 25 ° C.
Two cycles of a test were performed in which one cycle was a cycle of 24 hours (moisture absorption) at 25 ° C. in a 50% RH atmosphere after 24 hours (moisture absorption) in an H atmosphere. The result is shown in FIG. 2 (Δ: decorative sheet-covered humidity-control building material (1)). As is clear from FIG. 2, the decorative sheet-covered moisture-controllable building material (1) of the present invention has 140 g / m ² · 24 hr.
s to 150 g / m ² · 24 hrs, and a commercial wallpaper (moisture permeability: 100 g / m ^{2) on} a gypsum board
・ 24 hrs) has excellent moisture absorption / desorption ability as compared with the building material to which the adhesive is applied.

Example 2 The same base material as in Example 1 was used, and as a decorative sheet to be adhered to the surface of the base material, a base paper having a basis weight of 32.5 g / m ² (thickness: 51.0 μm) was used. First, solid color printing of a wood grain base color with an ink composed of a nitrocellulose (nitrified cotton) alkyd type synthetic resin and organic and inorganic pigments, wood grain pattern printing on this wood grain base color printing layer, and further A 1.8 g / m ² solid content of a coating resin comprising a urethane hardly yellowing type synthetic resin, an extender pigment, and a curing agent / release agent was used. The moisture permeability of the decorative sheet was 2000g ^/ m 2 · 24hrs.

An acrylic-modified ethylene / vinyl acetate copolymer resin (solid content: 51% by weight) was added to the decorative sheet.
g / scale ² and left for 6 minutes (open time), pressure: 5 kgf / cm ² , temperature: normal temperature, holding time:
Pressing was performed for 2 minutes. Then, after leaving (curing) for 3 hours in a room, drying was performed at 60 ° C. for 2 hours.

The humidity control properties of the decorative sheet-covered humidity control building material (2) thus obtained were tested. The sample had a thickness of 6 mm and a square shape of 250 mm square, and the front and back surfaces of the four corners of the subject were masked with a Teflon sheet and an aluminum adhesive tape. The test conditions were as follows: constant temperature, constant humidity, 48% in a 50% RH (relative humidity) atmosphere at 25 ° C.
After aged for 24 hours (moisture absorption) in a 90% RH atmosphere at 25 ° C., the specimen cured at 50 ° C.
Two cycles were tested, with one cycle of elapse (dehumidification) for 24 hours in an RH atmosphere as one cycle.

The results are shown in FIG. 2 together with the results of Example 1 (□: decorative sheet-covered humidity-control building material (2)). FIG.
As apparent from the decorative sheet-covered Humidity building material of the present invention (2) ^is, 115g / m 2 · ^24hrs~130g /
shows the absorption and retaining ability of m ² · 24hrs, commercial olefin wallpaper plasterboard (moisture permeability: 100g ^{/ m} 2 · 2
4 hrs) as compared with the building material to which it is attached.

[0036]

According to the present invention, while having the appearance of natural wood, it has a moisture absorption / desorption property equal to or higher than that of cedar lumber products, and
It is possible to provide a decorative sheet-covered moisture-controllable building material having excellent fire resistance and fire resistance.

[Brief description of the drawings]

FIG. 1 is a graph showing the moisture absorption / release properties of a substrate in a decorative sheet-covered moisture-control building material of the present invention.

FIG. 2 is a graph showing the moisture absorption and release properties of the decorative sheet-covered humidity-control building material of the present invention

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04F 13/14 102 E04F 13/14 102A // D21J 1/00 D21J 1/00 F-term (Reference) 2E001 DB03 DE01 FA10 FA14 GA03 GA24 HA01 HA03 HA21 HA22 HA23 HA28 HF04 2E110 AA02 AA16 AB03 AB23 BA12 BB02 BB03 GA23X GA32W GA33X GB12X GB16X GB17X GB18X GB23X GB35X GB63W 4F100 AC10 AE00A AE01 AE03 BA25E01 BA25A01 E04A01B01A04 JD15A JD16 JD16A JJ07 YY00A YY00B 4G012 PA05 PA07 PA18 PA22 PA29 4L055 AG05 AG08 AH01 AH02 FA30 GA21

Claims (1)

[Claims] 1. A substrate comprising a hygroscopic material having a particle size of 100 μm or less and a hydraulic material is provided with a moisture permeability ≧ 1000 g / m ^2.
-A decorative sheet covered with a decorative sheet of 24 hrs.