JP2002317399A - Wall paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorization wall paper carrying a built-in gas absorbing agent, excellent in gas absorbing property, scarcely dropping off the gas absorbing agent and at the same time capable of having beauty appearance. SOLUTION: The deodorization wall paper is prepared by placing a gas absorbing agent between a base paper and an upper paper having air permeability. Or, the deodorization wall paper is prepared by placing a gas absorbing agent between a base paper and an upper paper having air permeability, and further coating an air permeable decoration paper over the upper paper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to wallpaper.

[0002]

2. Description of the Related Art In recent years, there has been an increasing need for deodorizing not only the odor of a living room in a residence, but also the odor specific to a hospital and the aging odor emitted by people over the years. ing.

[0003] The occurrence of allergic diseases in detached houses and condominiums has been taken up as a major problem. These are commonly called "sick house syndrome"
One of the causes is considered to be volatile organic compounds (hereinafter referred to as VOCs) such as formaldehyde present in the indoor space, and the need to remove these compounds has been increasing remarkably.

On the other hand, in order to deodorize the indoor space and remove VOCs, it is usually necessary to frequently ventilate the room or to deodorize using a specific deodorant or adsorbent. Is being done.

[0005] Examples of the deodorant and the adsorbent include a porous substance and a layered compound, and there is a method of adsorbing and removing odor components by bringing them into contact with room air over a wide contact area. In the indoor space, the area of the ceiling and wall is large,
A lot of contact with indoor air can be maintained. Therefore,
Conventionally, porous materials such as diatomaceous earth, for example, are fired into bricks or tiles and used as wall materials or ceiling materials in order to carry porous materials on ceilings and wallpapers.

[0006] However, conventional bricks and the like are heavy, so that the burden of transporting them to the construction site is large. In addition, bricks and tiles have to be detained one by one at regular intervals in order to maintain the beauty of the appearance, requiring a high level of skill and great effort.

[0007] As another method, a method of kneading a porous substance into a paint and applying it to a wall surface or the like has been used. However, when the porous material is kneaded into the paint,
Since the coating covers the pores where gas should be adsorbed, there is a problem that the gas adsorbing performance of the porous substance cannot be fully utilized. Further, there is also a problem that the gas adsorbent is exposed or seen through, so that the beauty of the indoor space is impaired.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a deodorizing wallpaper which has excellent gas adsorption performance, has a small amount of gas adsorbent, and can maintain a beautiful appearance, and a method for producing the same. It is in.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of the above problems, and as a result, have found that the following structure can solve such problems.

That is, the present invention provides: 1. A wallpaper characterized by interposing a gas adsorbent between a base paper and an air-permeable top paper, The top paper is a nonwoven or pulp paper having air permeability. 2. Wallpaper described in The above paper is a decorative paper having air permeability; Or 2. The wallpaper described in 4. A decorative paper having air permeability is applied on the top paper. Or 2. 4. Wallpaper described in 1. Particles or fibers made of a thermoplastic material are interposed between the base paper and the top paper.
~ 4. 5. The wallpaper according to any of the above, The gas adsorbent is a particle having a particle size of 0.05 to 0.8 mm; ~ 5. 6. Wallpaper according to any of the above, The gas sorbent contains diatomaceous earth; ~ 6. 7. Wallpaper according to any of the above, A gas adsorbent is interposed between the base paper and the upper paper while the base paper and the upper paper having air permeability are fed out, and the base paper, the gas adsorbent and the upper paper are pressurized, and the base paper and the gas adsorbent are absorbed. 8. A method for producing a wallpaper, which comprises integrating an agent and an upper paper; A gas adsorbent is interposed between the base paper, the top paper having air permeability, and the decorative paper while being fed out, and the base paper, the gas adsorbent, the top paper, and the decorative paper are added. A method for producing a wallpaper, wherein the base paper, the gas adsorbent, the top paper and the decorative paper are integrated by pressurizing.

In the wallpaper of the present invention, since the top paper has air permeability, the air in the room passes through the top paper and comes into contact with the gas adsorbent. In addition, since the gas adsorbent is not exposed on the surface, the appearance is not significantly impaired.

Further, according to a preferred embodiment of the present invention, since the particles or fibers made of the thermoplastic material are interposed between the base paper and the top paper, the holes for adsorbing the gas of the gas adsorbent are unnecessary. The base paper, the top paper, and the gas adsorbent can be joined without blocking, and the original adsorption performance of the gas adsorbent can be effectively used.

In general, the adhesive contains a volatile organic solvent, and often generates VOC from the adhesive itself, and the adsorbent adsorbs VOC generated from the adhesive, and is originally used in indoor space. The ability to adsorb VOCs may be impaired. However, by bonding using particles or fibers made of a thermoplastic material according to the preferred embodiment described above, the problem of VOC generation is also eliminated.

In the present invention, the base paper refers to a sheet located on the wall side when the wallpaper is placed on the wall, and the top paper refers to a sheet located on the indoor space side when the wallpaper is placed on the wall. . The decorative paper is a sheet which is located on the outermost surface when wallpaper is arranged on a wall and has a design property.

As the base paper of the present invention, a paper made of pulp or cellulose may be used, a nonwoven fabric or a woven fabric made of synthetic fibers or natural fibers, or a plastic film may be used. . If the indoor surface of the base paper is too smooth, problems such as slipping of the gas adsorbent during supply of the gas adsorbent and bonding in the manufacturing process are likely to occur. It is preferable that there is unevenness such that moderate friction occurs between them. This also has the effect of increasing the bonding strength when bonding the base paper to the top paper or the gas adsorbent using an adhesive or a thermoplastic material.
For the same reason, it is preferable that the wallpaper surface of the upper paper also has irregularities. The base paper is preferably air-permeable because a hot blast stove can be used as the heating furnace when the base paper is processed by heating.

If the upper paper is a sheet having air permeability,
It may be a paper made of pulp or cellulose, or a cloth such as a nonwoven fabric or a woven fabric made of synthetic fibers or natural fibers.
There is no particular limitation. However, if the space is too large, there arises a problem that the gas adsorbent can be seen from the indoor space side and cannot be kept beautiful, or the gas adsorbent drops off. In addition, wallpaper often receives shocks such as contact with humans, but if such shocks cause damage such as tearing, problems such as falling off of the gas adsorbent from the area may occur. I do. In order to prevent this, it is preferable to use an upper paper having appropriate strength and air permeability. In order to have such performance, a preferable basis weight (weight per 1 m ² ) of the upper paper is 20 g / m ² or more and 500 g / m ² . If it is lighter than 20 g / m ² , the top paper will be too thin and the gas adsorbent will be visible,
In some cases, the adsorbent will fall off. 500g / m
^When it is heavier than ² , the air permeability of the upper paper is greatly impaired, and the deodorizing performance is deteriorated. A more preferred range of the basis weight is 30
g / m ² or more and 250 g / m ² or less. Specifically, spunbonded nonwoven fabric and wet paper pulp paper are preferably used as those having such characteristics.

Here, the spunbond nonwoven fabric is a nonwoven fabric formed by drawing a filament obtained by melt-spinning a thermoplastic polymer from a die with an air jet or the like while cooling, and collecting the filaments in a sheet shape. . As a more specific example, the filament spun from the spinning hole group of the melt spinneret is pulled by an air jet or the like while being cooled, accumulated in a sheet shape on a moving net below, and further pressed by a heat roller. An example is a filament molded by a method of partially thermocompression bonding filaments.
The single-filament fineness of the filament of the spun-bonded nonwoven fabric is generally about 0.3 to 20 dtex. It is preferable to use one having about 0.5 to 10 dtex.

[0018] As wet papermaking pulp paper, a slurry-like stock in which a pulp is dispersed by adding a dispersing agent is flowed on a long belt-like or cylindrical papermaking net, and the paper layer is dewatered to form a paper layer. It is good to use what was obtained by squeezing and drying. Since natural pulp is used, the texture is good, and in some cases, it can be used as decorative paper as well as top paper. It is superior to wet-made pulp paper in that it has higher air permeability and is easier to maintain. Therefore, pulp paper manufactured by a dry paper-making method may be used.

In the present invention, the gas adsorbent is not particularly limited as long as it has a gas adsorbing ability. For example, diatomaceous earth, activated carbon, zeolite, and porous silica particles can be used. The gas adsorbent preferably has a light surface color. This is because if the top paper is thin, the adsorbent may be seen through, and if the color of the adsorbent is dark, the design is restricted. Diatomaceous earth is a preferable material as the gas adsorbent of the present invention because it is pale in color and inexpensive.

When the gas adsorbent is particles, the particle size is as follows:
A range of 0.05 to 0.8 mm is preferred. Particles having a particle size larger than 0.8 mm are too large to secure a sufficient surface area of the adsorbent, and it is difficult to obtain high deodorant performance. Further, the shape of the gas adsorbent may come out of the upper paper, and the design may be deteriorated. Also, 0.05m
If it is smaller than m, the adsorbent will be in the form of fine powder and easily fall off from the interior of the wallpaper. Therefore, the preferable particle size range of the gas adsorbent particles is 0.05 to 0.8 mm, and more preferably 0.1 to 0.5 mm. Here, the particle diameter of the particles is defined by the spherical diameter of a sphere having the same volume when the gas adsorbent particles are not spherical.

When a material having a performance of adsorbing and desorbing water vapor is used as the gas adsorbent used in the present invention, a humidity control effect can be imparted in addition to deodorization. Examples of such a water vapor adsorbing / desorbing substance include silica gel, zeolite, diatomaceous earth, and activated carbon.

When a material having a gas absorbing / releasing property for appropriately adsorbing a gas is used in advance as a gas adsorbent, an effect as an aromatic wallpaper can be imparted in addition to deodorizing. Examples of such a material having a gas absorbing / releasing property include zeolite, diatomaceous earth, and a polymer material having the same function.

By applying a decorative paper having air permeability on the top paper, it is possible to obtain a wallpaper having a high designability. Here, when the decorative paper is applied on the top paper, it is necessary to prevent air permeability from being lost on the applied surface. For example, if an adhesive or the like is applied and adhered to the entire surface, ventilation will be blocked on the adhered surface. Therefore, as a means for applying without causing such a problem,
There is a method in which an adhesive is sprayed on a top paper (or a decorative paper) so as to be distributed in a spot shape, and the decorative paper (or the top paper) is pressed. However, the adhesive generally contains a volatile organic solvent, and often generates VOC from the adhesive. Therefore, as described above, more preferably, means for spraying particles or fibers made of a thermoplastic material and performing thermocompression bonding, or means for interposing a net-like material made of a thermoplastic material between the top paper and decorative paper and performing thermocompression bonding are used. preferable. The use of a thermoplastic material eliminates the problem of VOC generation, and adheres only portions where particles, fibers or nets made of the thermoplastic material are interposed, so that the other portions maintain air permeability. The top paper and the decorative paper can be applied as they are.

Further, the upper paper itself may be a decorative paper having a design property. It is very preferable that the upper paper itself is a decorative paper, because the number of constituent materials is reduced by one, and the step of applying the decorative paper to the upper paper by the above-mentioned means becomes unnecessary, leading to cost reduction.

The material of the decorative paper is not particularly limited as long as it has air permeability like the top paper. For example, paper made of pulp or cellulose, natural fiber such as cotton or hemp, or synthetic fiber such as polyester can be used. A woven or non-woven fabric is preferably used. The decorative paper may be printed in advance in order to enhance the design property, or may be subjected to a process of forming irregularities or the like, specifically, an embossing process. By using a decorative paper that is breathable and highly designable, the wallpaper that can maintain the contact between the air in the indoor space and the adsorbent, have excellent adsorption performance, and maintain aesthetic appearance Obtainable.

As a method of interposing a gas adsorbent between the base paper and the air-permeable upper paper, a mixture of a gas adsorbent and an adhesive is interposed between the base paper and the air-permeable upper paper. Adhesive may be applied, but in this case, a large area of the gas adsorbent surface will be covered with the adhesive, and the holes that adsorb gas will be blocked, and the gas adsorption performance will be impaired. It may be difficult to fully demonstrate deodorant performance. Therefore, it is preferable to interpose a gas adsorbent and particles or fibers made of a thermoplastic material between the base paper and the air-permeable top paper. When heat fusion is performed with a thermoplastic material, only the gas adsorbent, the base paper, and the top paper that are in contact with the thermoplastic material are bonded in a spot shape. Therefore, since the entire surface of the gas adsorbent is not necessarily covered, the holes for adsorbing the gas are not closed more than necessary, and the original adsorption performance of the gas adsorbent can be effectively utilized. Furthermore, the problem of VOC generation can be solved as described above. As the thermoplastic material, polyethylene, polyvinyl alcohol, polypropylene and the like are preferable. In particular, as the fiber, core-sheath type fiber,
In addition, it is preferable to use a combination in which the melting point or the softening point of the core portion of the core-sheath type fiber is higher than the melting point or the softening point of the sheath portion. As described above, the particles or fibers made of a thermoplastic material can be bonded in a spot-like manner without emitting an offensive odor as in the case of using an adhesive, and a high gas adsorbent holding power can be obtained. Adsorbent shedding can be minimized.

[0027]

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

FIG. 1 is a sectional view of a wallpaper as an example of an embodiment of the present invention. In FIG. 1, the wallpaper 100 is a base paper 3
A wallpaper in which a gas adsorbent 1 and short fibers 4 having a core-in-sheath structure made of a thermoplastic material having a melting point lower than that of the core portion are interposed between the air-permeable paper 2 and the upper paper 2 having air permeability. is there. Gas adsorbents 1 or gas adsorbent 1 and paper 2
Alternatively, the base paper 3 retains its shape by point bonding in which a portion in contact with the fiber 4 made of a thermoplastic material is fused. In the present example, the upper paper and the base paper are thermocompression-bonded to each other without interposing the gas adsorbent at the end of the wallpaper, thereby sealing off the gas adsorbent from the end. In order to prevent the adhesive from falling off from the end, a method of increasing the adhesive strength by applying a sealing tape, increasing the pressure of thermocompression bonding, or the like may be used.

When the wall paper is mounted on the wall, the base paper 3 is the surface to be mounted on the wall, and the top paper 2 is on the indoor space side. Although the gas adsorbent 1 and the indoor space are separated by the upper paper 2, the air in the indoor space is
It passes through the upper paper 2 and comes into contact with the gas adsorbent 1. Then, the odor components and the like are adsorbed and deodorized, and return to the indoor space again. In addition, the gas adsorbent 1 is not only the top paper 2 but also
Since the short paper 4 made of a thermoplastic material is also supported three-dimensionally, a high adhesive strength between the upper paper 2 and the base paper 3 can be obtained. Also, the gas adsorbent 1 is spot-bonded only at the point where the short fibers 4 made of a thermoplastic material are in contact, and most of the surface of the gas adsorbent 1 is covered with an adhesive or the like. Since there is no gas sorbent, the original high deodorizing performance of the gas adsorbent can be maintained.

FIG. 2 is a sectional view corresponding to FIG. 1 of a wallpaper according to another embodiment of the present invention. The wallpaper 200 of the present embodiment has a point that a decorative paper 6 having air permeability is covered by short fibers or particles 5 made of a thermoplastic material on the top paper 2 in FIG.
It is a wallpaper different from the form. Decorative paper 6 having air permeability
Is attached to the top paper 2 by a method of spot bonding with short fibers or particles 5 made of a thermoplastic material, so that the air permeability between the gas adsorbent 1 and the indoor space is the same as that of FIG. Since the decorative paper 5 is applied in addition to the top paper 2, it is possible to obtain a more beautiful wallpaper.

Next, a method for producing the above-described wallpaper will be described.

FIG. 3 is a schematic view of a longitudinal section parallel to the direction of travel of the wallpaper of the apparatus for producing the wallpaper of FIG. The apparatus includes a base paper roll 7 for feeding a base paper, a mixture supply unit 8 for feeding a mixture of particles or short fibers made of a thermoplastic material and a gas adsorbent, and an upper paper roll 10 for feeding a top paper.
A press roll 11 for pressing a laminate of the base paper 3, the mixture 9 and the base paper 3 to make the thickness uniform, a heating furnace 12 for thermocompression bonding the laminate, and a press roll 13; Wallpaper roll 1 that winds up the completed wallpaper
Consists of five.

When the wallpaper is manufactured, first, the base paper 3 is unwound from the base paper roll 7 while being stretched in the horizontal direction. On the base paper 3, a mixture 9 of particles or short fibers made of a thermoplastic material and a gas adsorbent, which have been mixed in a predetermined ratio in advance, is introduced from a mixture supply section 8, and an amount to be carried is dispersed. Further, the upper paper 2 is extended from the upper paper roll 10 in a stretched state, and is laminated thereon.

While keeping the laminated sheet horizontal, the sheet is passed through a heating furnace 12 set at a temperature higher than the melting point (or softening) point of the thermoplastic material to melt (or soften) the thermoplastic material. Press. The press roll 13 may be provided at only one place, or may be provided at a plurality of places and pressed in multiple stages as shown in FIG. Since the pressure is gradually increased by using multiple stages, an excessive force is not applied, and the occurrence of wrinkles and the like is reduced, and the pressure can be stably pressed. Thus, the integrated wallpaper 14 can be obtained.

Instead of the heating furnace 13, a hot blast furnace that blows hot air from above may be used. If not only the top paper 2 but also the base paper 3 is made of a material having air permeability, the hot air passes through the laminated sheets in a direction perpendicular to the surface, so that heat can be easily transferred to the inside and the top paper 2 can be evenly distributed. And the base paper 3 are easily bonded.

Further, the above-described laminated sheet is placed in a heating furnace 12.
By passing through the hot press roll 13 without passing through, hot pressing may be performed.

Next, a method for obtaining a wallpaper 200 shown in FIG. 2 by applying decorative paper to the top paper will be described. In this case, there are two methods. The first method is to obtain the wallpaper shown in FIG. 2 by subjecting the wallpaper obtained as shown in FIG. 3 to the same steps again. That is, particles or fibers made of a thermoplastic material are scattered on the upper paper after the process of FIG. 3, and decorative paper is fed out and laminated thereon, and the thermoplastic material is melted and pressed through a heating furnace or the like. In this way, a wallpaper in which the decorative paper is integrated is obtained.

The second method is a method in which the adhesion between the decorative paper and the top paper is performed simultaneously with the adhesion between the top paper and the base paper.
FIG. 4 is a schematic view of a longitudinal section parallel to the direction of travel of the wallpaper of the apparatus for producing the wallpaper shown in FIG. 2 by the second method. This apparatus has almost the same structure as the apparatus shown in FIG. 3, but supplies particles or short fibers of a thermoplastic material between a press roll 11 after a top paper roll 10 and a heating furnace 12. The difference is that there is a bonding material supply unit 16, a decorative paper roll 17 for feeding out decorative paper, and a holding roll 11 for holding these laminated bodies.

In the same manner as in the above method, the base paper 3 is unwound from the base paper roll 7, and a mixture 9 of a gas adsorbent and particles or short fibers of a thermoplastic material is sprayed thereon. The top paper 2 is unwound from the roll 10 and fibers or particles 4 made of a thermoplastic material are sprinkled thereon from a bonding material supply section 16 made of a thermoplastic material. The laminate is fed out, laminated, and heated to a temperature higher than the melting point or the softening point of the thermoplastic material in the heating furnace 12 and pressed by the press roll 13 to apply the decorative paper to the top paper to form the integrated wallpaper 14. It is to get.

This method is preferable because the number of times of passing the decorative paper through the heating furnace can be reduced as compared with the first method of applying the decorative paper through the heating furnace twice, so that the process is simplified and the cost is reduced. .

When the wallpaper thus obtained is applied to a wall with an adhesive, the adhesive permeates from the base paper side and exudes to the internal gas adsorbent side to cover the surface of the gas adsorbent. In order not to impair the deodorizing performance, a moisture-impermeable film such as polyethylene or polyester may be heated and laminated on the wall side of the base paper after the above steps.

As described above, the gas adsorption performance is excellent,
It is possible to obtain a wallpaper in which the gas adsorbent is less likely to fall off and the aesthetic appearance can be maintained.

[0043]

EXAMPLES Specific examples of the wallpaper of the present invention will be described below. Example 1 The wallpaper 100 shown in FIG. 1 was manufactured using the manufacturing apparatus shown in FIG.

As a gas adsorbent, a particle size distribution of 0.2 to
0.5 mm diatomaceous earth was prepared. Polyester staple fiber having a core-sheath structure composed of diatomaceous earth and a modified polyester having a softening point of a sheath portion of 110 ° C. and a core portion of polyester (fiber length: 5 m
m to 52 mm) were mixed so that the former was 70% by weight and the latter was 30% by weight to obtain a mixture 9 of a short fiber made of a thermoplastic material and a gas adsorbent.

As base paper 3 and top paper 2, polyester 100%, basis weight 50 g / m ² , air permeability 160 cc / cm ²
/ S spunbond nonwoven fabric is prepared. As the non-woven fabric to be used as the upper paper, a material on which a design pattern was printed in advance was used.

5 m / mi with the base paper 3 spread horizontally
n, and 250 g of the above mixture 9 was further added.
/ M ² , and the upper paper 2 is fed out at the same speed so that the pattern printing surface is on the upper surface, and the thickness is adjusted by the pressing roll 11 so that the thickness is substantially uniform. Into a heating furnace 12 having a length of 15 m and having been heated to a temperature of about 15 m. By passing through two press rolls 13 in a heating furnace, wallpaper 14 was obtained in which base paper 3, mixture 9 and top paper 2 were integrated. The wallpaper thus manufactured did not show particles of diatomaceous earth as an internal adsorbent from the top paper side (the indoor space side), and kept the aesthetic appearance of the wallpaper. No diatomaceous earth was dropped off from the surface layer.

Regarding the deodorizing performance, a formaldehyde adsorption test was conducted.

The formaldehyde adsorption test is as follows. The wallpaper is cut out in a size of 15 cm × 15 cm, and an evaluation sample obtained by aging for 4 hours in a room at a room temperature of 20 ° C. and a humidity of 50% is obtained. The evaluation sample is put in an odor bag and sealed, and the air in the odor bag is exhausted with an aspirator. Into the odor bag, 2 liters of formaldehyde gas previously adjusted to a concentration of 50 ppm is put. Twenty-four hours later, the amount of formaldehyde gas remaining in the odor bag is measured using a gas detector tube (manufactured by Gastech, formaldehyde 91L).

As a result of the formaldehyde adsorption test, the residual amount of formaldehyde was less than the detection limit of the detector tube (0.1 p.
pm) and excellent deodorizing performance. [Embodiment 2] Hereinafter, the manufacturing apparatus shown in FIG.
An example of a method for manufacturing the wallpaper 200 shown in FIG.

A mixture 9 of the same diatomaceous earth and a polyester short fiber having a core-sheath structure as in Example 1, a base paper 3 and a top paper 2 are prepared. Pulp 100%, basis weight 30g / m as decorative paper 6
^{2. A} design having a design pattern printed on the surface layer with an air flow rate of 150 cc / cm ² / s is prepared.

5 m / mi with the base paper 3 horizontally extended
n, and 250 g of the above mixture 9 was further added.
/ M ² , and the upper paper 2 is fed out at the same speed, and the thickness thereof is adjusted to be almost uniform by the holding roll 11, and the short fibers 16 made of the heat-fusible material are further placed thereon.
0 g / m ² , the decorative paper 17 was further fed out, and the thickness was adjusted to a substantially uniform state with the pressing roll 11 again. It is put into the heating furnace 12. By passing through two press rolls 13 in a heating furnace, a wallpaper 14 in which the base paper 3, the mixture 9, the top paper 2, and the decorative paper 6 are integrated is obtained.

As with the wallpaper of the first embodiment, the interior adsorbent particles cannot be seen from the indoor space side of this wallpaper, and the aesthetic appearance of the wallpaper can be maintained. Also, as for the deodorizing performance, the same performance as the wallpaper of the first embodiment can be obtained.

[0053]

As described in detail above, according to the present invention,
By interposing a gas adsorbent between the base paper and the upper paper having air permeability, it is possible to obtain a wallpaper which is excellent in gas adsorption performance, has little gas adsorbent falling off, and can maintain aesthetic appearance. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the wallpaper of the present invention.

FIG. 2 is a second sectional view of the wallpaper of the present invention.

FIG. 3 is a schematic view showing an example of steps of an apparatus for producing the wallpaper of FIG.

FIG. 4 is a schematic view showing an example of steps of an apparatus for producing the wallpaper of FIG. 2;

[Explanation of symbols]

1: Gas adsorbent 2: Top paper 3: Base paper 4: Short fibers made of a heat-fusible material 5: Particles or short fibers made of a heat-fusible material 6: Decorative paper 7: Base paper roll 8: Hot-fusible material 9: A mixture of particles or short fibers made of a heat-fusible material and a gas adsorbent 10: Top paper roll 11: Holding roll 12: Heating furnace 13: Press Roll 14: wallpaper 15: wallpaper roll 16: composite material supply unit 17: decorative paper roll

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) D06N 7/00 D06N 7/00 4L055 D21H 27/30 D21H 27/30 A E04F 13/00 E04F 13/00 B // B01J 20/14 B01J 20/14 F-term (reference) 4C080 AA05 BB02 CC12 HH05 JJ06 KK08 LL03 LL10 MM02 MM06 NN24 NN26 QQ03 4F055 AA15 CA14 CA18 DA02 EA04 EA24 EA25 EA38 FA40 GA34 4F100 AC10BA10B10A10BA10B10A10BA10B10A10BA10B10A10 DG15D DG15E GB08 JB16A JD02D JD02E JD14 JD14B YY00B 4G066 AA70B AC23C BA03 BA05 BA09 BA13 BA17 BA18 BA20 CA02 CA52 DA03 EA20 FA20 FA21 4L047 AA21 AA27 AA29 CA05 CA07 CB08 AG30 AGA18A30 AG15 AGA18

Claims (9)

[Claims] A wallpaper comprising a gas adsorbent interposed between a base paper and an upper paper having air permeability. 2. The wallpaper according to claim 1, wherein the top paper is a nonwoven or pulp paper having air permeability. 3. The above paper is a decorative paper having air permeability.
The wallpaper according to claim 1. 4. A wallpaper according to claim 1, wherein a decorative paper having air permeability is applied on said top paper. 5. The wallpaper according to claim 1, wherein particles or fibers made of a thermoplastic material are interposed between the base paper and the top paper. 6. The gas adsorbent has a particle size of 0.05 to 0.8 m.
The wallpaper according to any one of claims 1 to 5, which is a particle of m. 7. The wallpaper according to claim 1, wherein the gas adsorbent contains diatomaceous earth. 8. A gas adsorbent is interposed between the base paper and the upper paper while the base paper and the upper paper having air permeability are being fed, and the base paper, the gas adsorbent and the upper paper are pressurized. A method for producing wallpaper, comprising integrating a base paper, a gas adsorbent, and a top paper. 9. A gas adsorbent is interposed between the base paper, the upper paper having air permeability, and the decorative paper while paying out the base paper, the gas adsorbent, and the upper paper. And a decorative paper, wherein the base paper, the gas adsorbent, the top paper and the decorative paper are integrated by pressurizing the decorative paper.