JP2003239199A - Humidity-controlling wallpaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a humidity-controlling wallpaper having excellent fireproof effects and capable of providing a comfortable living space. <P>SOLUTION: The wallpaper contains an inorganic filler and Kanuma soil incorporated by paper making. The content of the Kanuma soil exceeds 50 wt.%, and the content of pulp is 5-10 wt.%. The wallpaper contains a binder, a pH regulator, a coagulant and an antifoamer. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a humidity control wallpaper which absorbs moisture in a high humidity atmosphere and releases the absorbed moisture in a low humidity atmosphere.

[0002]

The following are known as flame-retardant wallpaper. (1) A wallpaper made of vinyl chloride whose resin itself is flame retardant. (2) A sheet made of a cellulose paper base paper, a woven fabric or a composite of a base paper and a woven fabric is impregnated with a flame retardant chemical such as an organic phosphorus nitrogen compound, ammonium polyphosphate, guanidine sulfamate, or guanidine phosphate. A wallpaper that has been coated or has a flame retardant chemical added internally when it is made into paper. (3) A wallpaper in which resin is filled with inorganic fibers such as glass fiber, rock wool and asbestos.
(4) A wallpaper in which a large amount of aluminum hydroxide, which releases a large amount of water when heated and is accompanied by an endothermic reaction, has a combustion suppressing effect, is internally added. The conventional flame-retardant wallpaper is more difficult to burn than ordinary wallpaper, and therefore can exhibit a fireproof effect. In particular, wallpaper made of paper made of inorganic fibers such as glass fibers having excellent non-combustibility and heat resistance can exhibit extremely excellent fireproofing effect.

Also, a sheet material made of paper made from organic fibers such as pulp and diatomaceous earth is known (Japanese Patent Laid-Open No. 58-1513).
No. 60 publication). Since this sheet material is made of diatomaceous earth, which is excellent in noncombustibility and heat resistance, it can exhibit an extremely excellent fireproofing effect. Also, since diatomaceous earth is porous, this sheet material is lightweight. Therefore, this sheet material can be used as a lining material for interior building materials as a substitute for asbestos felt, asbestos paper, or the like.

Further, a humidity control functional building material in which a carbon humidity control material is carried on an inorganic fiber is also known (Japanese Patent Laid-Open No. 2000-3257).
No. 33 publication). The inorganic fibers are rock wool, slag wool, glass wool and the like. The charcoal humidity control material is composed of a granulated product of powdered coal and a noncombustible humidity control material. The non-combustible humidity conditioner is sepiolite, zeolite, diatomaceous earth, porous silica stone, allophane, or the like. In this humidity control function building material, the humidity control function is exhibited by the non-combustible humidity control material such as pulverized coal and sepiolite.
Therefore, according to the humidity control function building material, the humidity is automatically adjusted, and a comfortable living space can be provided. In addition, since the inorganic fiber and the noncombustible humidity control material have noncombustibility and heat resistance, the humidity control functional building material can exhibit a fireproof effect to some extent.

[0005]

However, although the conventional flame-retardant wallpaper and the sheet material described in JP-A-58-151360 described above can exhibit the fire-preventing effect, Since we did not actively use materials with a moistening effect, we could not automatically adjust the humidity, and we could not realize a comfortable living space.

Further, since the humidity control function building material described in JP 2000-325733 A is a building material having high rigidity, it cannot be wound in a roll shape,
It cannot be used as wallpaper. Further, since the granular coal contained in this humidity control functional building material is extremely easy to burn, the fire prevention effect of this humidity control functional building material was still insufficient.

The present invention has been made in view of the above-mentioned conventional circumstances, and it is an object to be solved to provide a humidity-controlling wallpaper which has an excellent fireproof effect and can realize a comfortable living space by humidity control. I am trying.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies and found that the above problems can be solved by making an inorganic fiber and Kanuma soil into paper, and have completed the present invention.
That is, the humidity-controlling wallpaper of the present invention is characterized in that inorganic fibers and Kanuma soil are produced.

The humidity-controlling wallpaper of the present invention has an excellent fire-preventing effect because it is made of inorganic fibers and Kanuma soil which are excellent in non-combustibility and heat resistance. Examples of the inorganic fiber include glass fiber, rock wool, slag wool, and the like, but glass fiber is preferable from the viewpoint of cost.
Chopped strands of suitable length are suitable as the glass fiber. In particular, chopped strands having a maximum diameter of less than 6 μm are preferable from the viewpoint of the texture of wallpaper.

Further, Kanuma soil has extremely small pores on the order of nanometers, and water molecules are adsorbed by the pores in an atmosphere of high humidity, and water molecules adsorbed by the pores are desorbed in an atmosphere of low humidity. . Therefore, this humidity control wallpaper can automatically adjust the humidity.

Therefore, the humidity-controlling wallpaper has an excellent fireproof effect and can realize a comfortable living space by controlling the humidity.

In addition to Kanuma soil, if diatomaceous earth or activated carbon is internally added, this humidity control wallpaper will have a VOC (volatile organic chemical substance) adsorption function.

Kanuma soil preferably exceeds 50% by mass. The humidity control effect of the humidity control wallpaper that automatically controls the humidity is due to the humidity control effect of Kanuma soil. If the humidity control wallpaper contains as much Kanuma soil as possible, the humidity control effect of the humidity control wallpaper becomes large. According to the test results of the inventors, the humidity control wallpaper has
If a large amount of Kanuma soil exceeding 0% by mass is contained, the humidity-controlling wallpaper will adsorb and desorb a large amount of water depending on the ambient humidity, and exhibit a humidity-controlling effect that is more than practical. Becomes

It is preferable that the humidity-controlled wallpaper is made of paper with as little pulp as possible. Since the inorganic fibers have high rigidity and are difficult to bend, the degree of entanglement of the inorganic fibers during papermaking is small. For this reason, even if it is attempted to make a paper only with the inorganic fiber and Kanuma soil, the paper making is difficult. Even if the paper can be made, it will be a humidity controlled wallpaper with low strength. On the other hand, since pulp is highly flexible, if it is mixed with inorganic fibers to make a paper, the pulp will be entangled with the inorganic fibers and the paper can be easily made. On the other hand, since pulp is a flammable substance, if the amount of pulp increases, the fireproof effect of the humidity-controlled wallpaper may decrease. For this reason, it is preferable that the humidity-controlled wallpaper is made of as little pulp as possible. According to the test results of the inventors, the humidity control wallpaper has
When 10% by mass of pulp is contained, papermaking is easy and the fireproof effect is hardly reduced. As the pulp, in addition to ordinary pulp made of cellulose, phosphoric acid pulp impregnated with phosphate to make it flame-retardant may be used. In addition to pulp, organic fibers such as aramid fibers may be used.

It is preferable that the humidity-controlled wallpaper is formed by making a papermaking slurry containing a binder. In this case, the Kanuma soil is firmly fixed to the inorganic fibers, the Kanuma soil is less likely to fall off from the humidity control wallpaper, and the production yield is improved. As the binder, acrylic resin, SBR, starch, casein or the like can be used.

The humidity control wallpaper is preferably made by making a papermaking slurry containing a pH adjusting agent, a coagulant and a defoaming agent. When the inorganic fibers and Kanuma soil are made into paper, their dispersion state changes depending on pH. Therefore, if the humidity-controlling wallpaper is made of papermaking slurry containing a pH adjusting agent, it is possible to always carry out papermaking in a constant dispersion state, and the quality becomes stable. In addition, if the humidity-controlling wallpaper is made from a papermaking slurry containing a flocculant, inorganic fibers and Kanuma soil are likely to coagulate during the papermaking. Therefore, papermaking can be easily performed. Furthermore, if the humidity control wallpaper is made from a papermaking slurry containing an antifoaming agent,
Foaming of the dispersion liquid in which the inorganic fibers and Kanuma soil are dispersed can be prevented during the papermaking, and the papermaking can be easily performed and the occurrence of defects due to the foams can be prevented.

[0017]

Embodiments 1 to 3 embodying the present invention will be described below with reference to the drawings.

Example 1 As the inorganic fibers, glass fibers (maximum diameter 6 μm) and rock wool are prepared. Also prepare pulp.

Further, Kanuma soil powder is prepared by crushing Kanuma soil with a wet mill which does not use a dispersant and dried with a spray dryer. The average particle size of this Kanuma soil powder is 8 to 2
It is 0 μm, and the maximum particle diameter is 300 μm or less.

Further, an acrylic resin as a binder,
Aluminum sulfate as a pH adjusting agent, polyacrylamide as an aggregating agent, and a higher alcohol surfactant as an antifoaming agent are prepared.

The above glass fibers, rock wool, Kanuma soil powder, pulp, binder, pH adjusting agent, coagulant, and defoaming agent are weighed in the following proportions, and these are mixed with water in a mass ratio of 1:99. And make a papermaking slurry. Glass fiber: 2.0 mass% Rockwool: 9.0 mass% Kanuma soil powder: 73.0 mass% Pulp: 7.0 mass% Binder・ ・ ・ 7.0 mass% pH adjuster ・ ・ ・ 1.0 mass% Flocculant ・ ・ ・ 0.5 mass% Defoamer ・ ・ ・ 0.5 mass%

Using the papermaking slurry thus obtained, papermaking is carried out using the Fourdrinier paper machine shown in FIG. 1 which has been used for papermaking. This fourdrinier paper machine is provided with a head box 1 for supplying papermaking slurry, a wire netting 2 for conveying the papermaking slurry, and an upper surface of the metal netting 2 facing each other. Dandy Roll 3
A felt 4 and a press roll 5 which are further pressed to dehydrate the paper product on the wire net 2, a cylinder dryer 6 for drying the paper product, a size press 7 for sizing, and a calendar 8. And a winder 9. The wire netting 2 and the felt 4 are guided by rollers to rotate endlessly.

When papermaking is carried out using this Fourdrinier paper machine,
First, the papermaking slurry is supplied from the head box 1 onto the wire mesh 2. The papermaking slurry on the wire net 2 is squeezed by the dandy rolls 3 and dehydrated to form a papermaking product.

The paper product is sent from the wire mesh 2 onto the felt 4, and is further squeezed by the press roll 5. After that, the paper product is dried by the cylinder dryer 6, passed through the size press 7 and the calender 8, and wound up by the winder 9. Thus, the humidity control wallpaper 10 of Example 1 is obtained.

(Example 2) The humidity-controlled wallpaper 10 of Example 2 is a papermaking slurry in the following proportions. Glass fiber: 2.00 mass% Rock wool: 7.00 mass% Kanuma soil powder: 78.00 mass% Pulp: 6.00 mass% Binder・ ・ ・ ・ ・ 6.0 mass% pH adjuster ・ ・ ・ 0.50 mass% Flocculant ・ ・ ・ 0.25 mass% Defoamer ・ ・ ・ 0.25 Mass% Other conditions are the same as in Example 1.

(Example 3) The humidity controlled wallpaper 10 of Example 3 is a papermaking slurry in the following proportions. Glass fiber: 1.00 mass% Rock wool: 6.00 mass% Kanuma soil powder: 80.00 mass% Pulp: 6.00 mass% Binder・ ・ ・ ・ ・ 6.0 mass% pH adjuster ・ ・ ・ 0.50 mass% Flocculant ・ ・ ・ 0.25 mass% Defoamer ・ ・ ・ 0.25 Mass% Other conditions are the same as in Example 1.

(Evaluation) Regarding the humidity control wallpaper 10 of Examples 1 to 3 thus obtained, the water absorption amount and the relative humidity when the relative humidity was changed from 50% to 90% were from 90% to 50%.
The amount of water discharged when it was changed to% was determined by the weight change. The measurement was performed at 25 ° C. The results are shown in Table 1.

[0028]

[Table 1]

As shown in Table 1, in the humidity control wallpapers 10 of Examples 1 to 3, due to the humidity control effect of Kanuma soil, water molecules are adsorbed in the pores in a high humidity atmosphere and in the pores in a low humidity atmosphere. Adsorbed water molecules are desorbed. Therefore, the humidity control wallpaper 10 can automatically adjust the humidity.

Further, the humidity-controlling wallpaper 10 has excellent fireproofing effect because it is made of glass fiber, rock wool and Kanuma soil powder which are excellent in non-combustibility and heat resistance.

Further, since 5 to 10% by mass of pulp is formed on the humidity-controlling wallpaper 10, the pulp is entangled with glass fibers and rock wool during the papermaking process.
Papermaking can be easily performed. Moreover, since the humidity control wallpaper 10 has the pulp content as low as possible, the fireproof effect is hardly reduced.

Further, since the humidity control wallpaper 10 is made of a papermaking slurry containing a binder, the Kanuma soil is firmly fixed to the glass fiber or rock wool, and the Kanuma soil is hard to fall off from the humidity control wallpaper 10. Therefore, the yield in manufacturing is extremely good.

Since the humidity-controlling wallpaper 10 is composed of a papermaking slurry containing a pH adjusting agent, a coagulant and a defoaming agent,
The quality is stable, papermaking can be easily performed, and defects due to bubbles are prevented.

Therefore, the humidity controlled wallpaper 10 of Examples 1 to 3
Can provide a comfortable living space with excellent fire protection.

In the humidity controlled wallpaper of the present invention, white pigments such as titanium oxide, aluminum hydroxide, kaolin and calcium carbonate may be internally added to the wallpaper in addition to Kanuma soil. When titanium oxide is added internally, a photocatalytic function is imparted to the wallpaper, and effects such as VOC decomposition can be obtained. Further, when aluminum hydroxide is internally added, the wallpaper has a combustion suppressing function.

[Brief description of drawings]

FIG. 1 is a block diagram of a paper machine.

[Explanation of symbols]

1 ... Headbox 2 ... Wire mesh 4 ... felt 6 ... Cylinder dryer 9 ... Winding machine 10… Humidity control wallpaper

Claims (6)

[Claims] 1. A humidity control wallpaper, characterized in that inorganic fibers and Kanuma soil are produced. 2. The humidity controlled wallpaper according to claim 1, wherein Kanuma soil exceeds 50 mass%. 3. The humidity controlled wallpaper according to claim 1, wherein as little pulp as possible is produced. 4. The humidity controlled wallpaper according to claim 3, wherein the pulp is 5 to 10 mass%. 5. The humidity control wallpaper according to claim 1, wherein the humidity control wallpaper is formed by making a papermaking slurry containing a binder. 6. A papermaking slurry containing a pH adjusting agent, a coagulant and a defoaming agent, which is produced by papermaking.
The humidity control wallpaper according to any one of 1.