JP7572699B2 - Easily removable wallpaper and its removal and application methods - Google Patents

Description

The present invention relates to easily removable wallpaper that can be easily attached to a wall surface and easily peeled off from the wall surface by allowing liquid to penetrate into the surface (one side) when attached to the wall surface, and in particular to easily removable wallpaper that can be easily attached to a wall surface and easily peeled off from the wall surface by spraying a liquid such as water on the surface.

In Japan, wallpaper made with polyvinyl chloride (vinyl chloride wallpaper) accounts for over 80% of wall covering finishes. PVC wallpaper is inexpensive, has water resistance and stain resistance from the surface, and shortens the construction time for wall covering finishes, making it ideal for meeting housing demand during the period of high economic growth. However, there was a problem in that mold was prone to growing on the back side of PVC wallpaper in hot and humid environments such as Japan.

In addition, the vinyl chloride used in vinyl chloride wallpaper is an inherently hard material, so plasticizers are added to make it flexible before use. However, after being exposed to direct sunlight for around 5 to 15 years, vinyl chloride begins to harden. This results in gaps forming between the wallpaper and the wall surface, which reduces the wallpaper's design quality. For these reasons, in Japan today, vinyl chloride wallpaper is generally replaced after around 10 to 15 years.

Then, when vinyl chloride wallpaper is peeled off from the wall when it is replaced, the backing paper often remains on the plasterboard side (the wall side), and since the backing paper often has poor contact with the wall, it is difficult to peel the vinyl chloride wallpaper off the wall cleanly. As a result, the backing paper residue creates unevenness on the wall surface (poor base), and when replacing the wallpaper a second or third time, only wallpaper made from thick foamed vinyl chloride for renovations can be used. In addition, if the backing paper remains on the wall, it will generate more heat when burned, which could cause the wallpaper to fall outside the regulations for non-combustible certification.

On the other hand, in light of recent increased environmental awareness, measures to combat global warming, and the SDGs, there is a demand for wallpaper that can be used for a long time and wallpaper that can be removed without damaging the structure during renovations.

In such a situation, applicable wallpapers have been proposed. For example, Patent Document 1 proposes an adhesive wallpaper comprising a wallpaper body consisting of a decorative layer and a backing paper layer provided on the back side of the decorative layer, and an adhesive layer (remoisturizing glue) provided on the back side of the wallpaper body, in which the moisture content of the backing paper layer is 0.1% by weight to 2.5% by weight when the absolute humidity is 1.9 g/m ³ to 27.3 g/m ³ , the density of the backing paper constituting the backing paper layer is 0.1 g/cm ³ to 0.8 g/cm ³ , and even if the wallpaper is pasted on top of an already pasted wallpaper, it is not affected by environmental changes and can maintain its beautiful condition, and furthermore, the pasting position can be finely adjusted, the joints formed by butting the wallpaper together can be maintained in a beautiful condition, and pasting to a ceiling surface can be easily performed.

JP 2009-19293 A

However, the adhesive wallpaper described in the above-mentioned Patent Document 1 is intended to be applied over wallpaper that is already applied, and is not intended to improve peelability. In addition, as the moisture content of the backing paper layer is described as 0.1% to 2.5% by weight, there is no idea of actively adding moisture to the adhesive wallpaper described in Patent Document 1 to peel it off from a wall surface, etc. Furthermore, as is clear from the description that a surface film may be laminated on the surface of the decorative layer, Patent Document 1 also does not include the idea of actively supplying moisture to the surface of the wallpaper while it is applied to the wall surface to supply moisture to the re-moistened glue on the back side.

In view of the above-mentioned circumstances, the present invention aims to provide an easily removable wallpaper that can be easily attached to a wall surface and can also be easily peeled off from the wall surface by allowing liquid to penetrate the surface when attached to the wall surface.

As a result of extensive research and development into the problems mentioned above, the inventors of the present invention have discovered the following revolutionary easy-to-peel wallpaper.

The first aspect of the present invention for solving the above problem is an easily peelable wallpaper that can be easily peeled off from a wall surface by allowing liquid to penetrate from one side while it is attached to a wall surface on the other side, and is characterized in that the easily peelable wallpaper has a wallpaper body that allows liquid to penetrate from one side to the other side, and a re-wettable layer is provided on the other side of the wallpaper body, which absorbs liquid and reduces its adhesive strength with the wall surface.

According to this first aspect, when the wallpaper is attached to a wall surface, liquid can be permeated from the surface on one side, making it easy to peel the easily removable wallpaper from the wall surface.

A second aspect of the present invention is the easily peelable wallpaper according to the first aspect, characterized in that the wallpaper body has a liquid moisture permeability of 600 g/ ^m2 ·24 h or more.

Here, the term "liquid moisture permeability" refers to a value indicating how many grams of liquid permeates per square ^meter of fabric in 24 hours. Note that the moisture permeability can be measured, for example, by JIS L 1099:2012 (calcium chloride method).

According to this second aspect, when the wallpaper is attached to a wall surface, liquid can penetrate more effectively from the surface, making it easier to peel the easily removable wallpaper from the wall surface.

A third aspect of the present invention is an easily peelable wallpaper as described in the first or second aspect, characterized in that the wallpaper body has a plurality of holes formed therein that penetrate from one side to the other side.

According to this third aspect, when the wallpaper is attached to a wall surface, liquid can be more easily absorbed from the surface, making it easier to peel the easily removable wallpaper from the wall surface.

A fourth aspect of the present invention is an easily peelable wallpaper as described in the first or second aspect, characterized in that the wallpaper body is a nonwoven fabric containing 5 to 40% by weight of polyester fibers and 60 to 95% by weight of pulp.

According to the fourth aspect, the nonwoven fabric of this configuration has low elongation in water (submerged elongation), and therefore does not expand easily even when it absorbs water (humidity). As a result, the easily peelable wallpaper can be more easily peeled off from the wall surface. Furthermore, according to the fourth aspect, the strength of the easily peelable wallpaper is increased, so the wallpaper is less likely to deteriorate, and the aesthetic appearance of the easily peelable wallpaper can be maintained for a longer period of time.

A fifth aspect of the present invention is an easily peelable wallpaper as described in the fourth aspect, characterized in that the crystallinity of the polyester fibers on one or the other side of the wallpaper body is lower than the crystallinity of the polyester fibers inside the wallpaper body.

According to the fifth aspect, the nonwoven fabric of this configuration can improve the flexibility of the wallpaper body without changing the tensile strength or underwater elongation. As a result, the embossing described below can be easily formed. In addition, there is no need to use a highly pure (low crystallinity) material to manufacture the polyester fiber, and polyester fiber made from recycled resin, for example, can be used.

A sixth aspect of the present invention is an easily peelable wallpaper as described in the first aspect, characterized in that the wallpaper body comprises at least one of diatomaceous earth, lime plaster and porous material.

Here, "plaster" refers to a building material whose main ingredient is calcium hydroxide.

According to the sixth aspect, when the wallpaper is attached to a wall surface, liquid can be more easily absorbed from the surface, making it easier to peel the easily removable wallpaper from the wall surface.

The seventh aspect of the present invention is an easily peelable wallpaper as described in the first aspect, characterized in that the underwater elongation of the wallpaper body is 0.5% or less.

According to the seventh aspect, even if liquid is supplied to the surface, the wallpaper body is unlikely to break, and the easy-to-peel wallpaper can be easily peeled off from the wall surface. In addition, according to the seventh aspect, the dimensional stability of the easy-to-peel wallpaper is improved, thereby improving the durability of the wallpaper.

The eighth aspect of the present invention is an easily peelable wallpaper as described in claim 1, characterized in that a surface layer is provided on one side surface of the wallpaper body.

According to this eighth aspect, the decorativeness of the easily peelable wallpaper can be improved.

A ninth aspect of the present invention is an easily peelable wallpaper as described in the first aspect, characterized in that the liquid is water.

According to the ninth aspect, the easy-to-peel wallpaper can be easily peeled off from a wall surface without placing a burden on the environment. In addition, there is no need to use glue or the like when attaching the wallpaper to a wall surface, which shortens the construction time required for attaching the wallpaper and reduces the construction costs, and also shortens the construction time required for removing the wallpaper from the wall surface and reduces the construction costs.

The tenth aspect of the present invention is a method for removing easily peelable wallpaper, comprising the steps of: penetrating a liquid into the easily peelable wallpaper; and peeling the easily peelable wallpaper from the wall surface, the method comprising the steps of: penetrating a liquid into the easily peelable wallpaper; and peeling the easily peelable wallpaper from the wall surface.

According to this tenth aspect, the easy-to-peel wallpaper can be easily peeled off from the wall surface.

An eleventh aspect of the present invention is a method for removing easily removable wallpaper, as described in claim 9, characterized in that the liquid contains a surfactant.

According to this 11th aspect, the specified liquid can be easily penetrated into the wallpaper body.

The twelfth aspect of the present invention is a method for removing easily-peelable wallpaper, comprising the steps of: a surface layer peeling step for peeling the surface layer from the main body of the wallpaper; a penetration step for allowing a liquid to penetrate the easily-peelable wallpaper; and a peeling step for peeling the easily-peelable wallpaper from the wall surface, the method comprising the steps of: a surface layer peeling step for peeling the surface layer from the main body of the wallpaper; a penetration step for allowing a liquid to penetrate the easily-peelable wallpaper; and a peeling step for peeling the easily-peelable wallpaper from the wall surface.

According to this 12th aspect, the easily peelable wallpaper having a surface layer can be easily peeled off from the wall surface.

The thirteenth aspect of the present invention is a method for attaching easily peelable wallpaper, which comprises attaching the easily peelable wallpaper described in the first aspect to a wall surface, and is characterized in that the method comprises a re-moisturizing layer forming step of forming a re-moisturizing layer on the wall surface, and an adhesion step of adhering the wallpaper body to the re-moisturizing layer.

According to this 13th aspect, the easily peelable wallpaper can be easily attached to a wall surface.

The fourteenth aspect of the present invention is a method for attaching easily peelable wallpaper, which comprises attaching the easily peelable wallpaper described in the eighth aspect to a wall surface, and is characterized in that the method comprises a re-moisturizing layer forming step of forming a re-moisturizing layer on the wall surface, and an adhesion step of adhering a wallpaper body having a surface layer provided thereon to the re-moisturizing layer.

According to this 14th aspect, the easily peelable wallpaper having a surface layer can be easily attached to a wall surface.

FIG. 1 is a schematic cross-sectional view of an easily peelable wallpaper according to a first embodiment in a state where the wallpaper is attached to a wall surface. FIG. 2 is a flowchart showing a method for removing easily removable wallpaper according to the first embodiment. FIG. 1 is a schematic cross-sectional view of an easily peelable wallpaper according to a second embodiment in a state where the wallpaper is attached to a wall surface.

Below, an embodiment of the easily peelable wallpaper according to the present invention will be described with reference to the attached drawings. Note that the present invention is not limited to the following embodiment.

(Embodiment 1)
Fig. 1 is a schematic cross-sectional view of the easily peelable wallpaper according to the first embodiment in a state of being attached to a wall surface. As shown in this figure, the easily peelable wallpaper 1 according to this embodiment is a wallpaper to be attached to a wall surface 100, and is composed of a wallpaper body 10 and a remoisturizing layer 20 provided on the back surface (other surface) of the wall surface side of the wallpaper body 10 and adhered to the wall surface 100. Herein, the material, shape, etc. of the wall surface 100 are not particularly limited as long as it is a wall surface inside a building. Hereinafter, the wall surface side surface of the wallpaper body 10 is defined as the back surface (other surface) 10b, and the opposite surface is defined as the front surface (one surface) 10a.

First, the wallpaper body 10 will be described. The wallpaper body 10 is not particularly limited as long as it can allow liquid supplied to the surface 10a to permeate from the surface 10a to the back surface 10b, or has holes through which the liquid can seep. Materials constituting the wallpaper body 10 include, for example, those having a moisture permeability to liquid of 600 g/m ² ·24 h or more (paper (including porous paper), inorganic paper solidified into a sheet shape with inorganic substances such as diatomaceous earth and glass fiber as the main component, cloth-like materials woven from fibers such as rayon, acrylic, and polyester, woven fabrics such as denim fabric, porous sheets containing polyethylene (PE) and polypropylene (PP), those having a plurality of holes penetrating from the surface 10a to the back surface 10b, or those containing at least one of diatomaceous earth, plaster, and porous materials), and those having a moisture permeability of 700 g/m ² ·24 h or more are more preferable. The upper limit of the moisture permeability of the wallpaper body 10 is not particularly limited, but examples of the upper limit of the moisture permeability include 1000 g/ ^m2 ·24h and 1400 g/ ^m2 ·24h. The holes are not particularly limited as long as they ultimately penetrate from the front surface 10a to the back surface 10b, and may be bent or twisted. The diameter and shape of the holes are not particularly limited.

Furthermore, it is desirable that the tensile strength of the wallpaper body 10 when wet in the vertical direction (the direction in which the wallpaper roll travels) is in the range of 1.5 to 3 kN/m, and more desirably in the range of 1.9 to 2.5 kN/m. The tensile strength when wet can be measured according to JIS P8135:1998, etc.

Examples of wallpaper bodies 10 having multiple holes formed through from the front surface 10a to the back surface 10b include paper-based wallpapers whose main material is paper (regular paper, flame-retardant paper, paper cloth, etc.), woven wallpapers whose main material is natural materials (cotton and linen) or rayon made from trees, wallpapers made of synthetic resins such as polyvinyl chloride with multiple holes, wallpapers whose main components are polyethylene or polypropylene (olefin wallpapers), sliding door paper containing fibers such as silk, wallpapers sprayed with eggshells (Egg Wall (registered trademark)), nonwoven fabrics, denim fabrics, porous sheets, etc.

In this embodiment, the wallpaper body 10 is made of a single layer of material, but it may be a multi-layer structure of two or more layers that allows liquid supplied to the front surface 10a to penetrate from the front surface 10a to the back surface 10b, or has holes through which the liquid can seep in.

Here, nonwoven fabric is suitable for the wallpaper body 10. The nonwoven fabric is not particularly limited, but preferably contains 5 to 40% by weight of polyester fiber and 60 to 95% by weight of pulp. As the pulp, softwood bleached chemical pulp (NBCP), hardwood bleached chemical pulp (LBCP), or a mixture of these can be used. The cross-sectional shape of the pulp is not particularly limited, but circular or elliptical shapes (excluding irregular cross-sections) are preferred, as the tensile strength is improved by the pulp particles being moderately entangled with each other. The diameter of the pulp and polyester fiber is preferably 5 μm to 20 μm, and more preferably 10 μm to 15 μm.

There is no particular limitation on polyester fibers, but fibers such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) are preferred.

A nonwoven fabric with this configuration has a high tensile strength (e.g., 100 N/15 mm or more), which can prevent the easy-to-peel wallpaper 1 from cracking or breaking due to the movement of the structure caused by drying of the structure or shaking of the earth's crust, etc. If the tensile strength is less than 100 N/15 mm, the easy-to-peel wallpaper may crack or break due to the movement of the structure.

Furthermore, a nonwoven fabric of this configuration has low underwater elongation (wet elongation) (for example, 0.5% or less, preferably 0.3% or less), so it is less likely to expand even when it absorbs water (humidity). As a result, tearing of the easily peelable wallpaper 1 due to water absorption can be prevented. If the underwater elongation is greater than 1%, there is a possibility that tearing of the easily peelable wallpaper due to water absorption may occur.

The weight ratios of polyester fibers and pulp are preferably 20-35% by weight and 65-80% by weight. A nonwoven fabric with this configuration combines high tensile strength with low elongation in water, and can better prevent cracks and tears in the easily peelable wallpaper 1 caused by movement of the structure or absorption of moisture. The nonwoven fabric may be configured to contain glass fibers in addition to polyester fibers and pulp. The inclusion of glass fibers can improve the strength and durability of the nonwoven fabric.

In addition to these fibers, the nonwoven fabric may contain titanium oxide or the like as a stabilizer, and may contain synthetic rubber, acrylic, vinyl acetate, vinyl chloride, or urethane binders. It goes without saying that the nonwoven fabric does not have to contain anything other than polyester fibers and pulp.

Furthermore, it is preferable that the crystallinity of the polyester fibers on the front and back surfaces of the nonwoven fabric is lower than the crystallinity of the polyester fibers inside the nonwoven fabric. A nonwoven fabric with such a structure can improve the flexibility of the wallpaper body without changing the tensile strength or elongation in water. The crystallinity of the polyester fibers can be determined, for example, by comparing the melting points of the polyester fibers (it can be determined that polyester fibers with lower melting points have a lower crystallinity than polyester fibers with higher melting points). Such nonwoven fabrics can be manufactured by heating and then rapidly cooling, for example.

The thickness of the wallpaper body 10 is not particularly limited, but is preferably 0.15 mm to 3.5 mm, and particularly preferably 0.3 mm to 1.2 mm. If the thickness of the wallpaper body 10 is thinner than 0.15 mm, the strength will decrease, and the wallpaper body 10 may tear when attached to the wall surface 100, or the unevenness formed on the wall surface may appear on the wallpaper surface when attached to the wall surface 100. On the other hand, if the thickness of the wallpaper body 10 is thicker than 3.5 mm, it will be difficult to attach to the wall surface 100 and liquids will not penetrate easily, and as a result, the wallpaper body 1 will be difficult to peel off from the wall surface 100.

Next, the rewetting layer 20 will be described. The rewetting layer 20 is not particularly limited as long as it absorbs liquid and its adhesive strength with the wall surface 100 decreases. The rewetting layer 20 may be formed, for example, by impregnating the back surface 10b of the wallpaper body 10 with an adhesive having rewetting properties (the property of reducing adhesive strength with the wall surface 100 by absorbing liquid), or by applying an adhesive having rewetting properties to the surface of the back surface 10b of the wallpaper body 10, or by impregnating the back surface 10b of the wallpaper body 10 with a portion of an adhesive having rewetting properties and applying the other adhesive to the surface of the back surface 10b of the wallpaper body 10.

Here, the re-wetting adhesive is not particularly limited as long as it is an adhesive that has the property of reducing its adhesive strength with the wall surface 100 by absorbing a specified liquid. The specified liquid is not particularly limited as long as it is absorbed by the adhesive and reduces the adhesive strength of the adhesive. Examples of the specified liquid include water (including warm water at 60°C to 90°C), acetone, dimethylformamide, boric acid, alcohol, toluene, etc.

A surfactant may be added to the specified liquid. There are no particular limitations on the surfactant as long as it reduces the interfacial tension (surface tension) of the specified liquid. When the specified liquid is water, examples of surfactants include sodium alkyl sulfate, sodium alkylamino fatty acid, polyoxyethylene alkyl ether, etc. By adding a surfactant to the specified liquid, the specified liquid can be easily penetrated into the wallpaper body 10. As a result, the easy-to-peel wallpaper can be more easily peeled off from the wall surface. There are no particular limitations on the amount of surfactant added, but it is desirable to add 3 to 15% by weight of the specified liquid.

The adhesive is not particularly limited as long as it contains a water-soluble polymer with rewetting properties. Specific examples of adhesives include adhesives containing starch, glue, dextrin, polyvinyl alcohol, polyvinyl acetate, silicic acid, polyacrylic acid, etc.

In addition, a thickener that improves viscosity may be added to the adhesive. By adding a thickener, the viscosity and water retention of the adhesive can be improved. As a result, the adhesive strength and drying time can be adjusted, so that the adhesive can be easily applied to the wall surface. Examples of thickeners include glycerin such as purified glycerin (Sakamoto Yakuhin Kogyo Co., Ltd.), acrylic acid-based water-soluble polymers such as AQUALIC (registered trademark) L and H, guar gum, xanthan gum, etc. The amount of thickener added is not particularly limited, but is preferably 5 to 35% by weight of the adhesive, and more preferably 15 to 30%. If the amount of additive added is less than 5% by weight of the adhesive, the improvement in water retention and viscosity will be insufficient, and if it is more than 35%, the adhesive strength will decrease and the curing time will be delayed.

The thickness of the re-moisturizing layer 20 is not particularly limited, but is preferably 0.01 mm to 1 mm. If the thickness of the re-moisturizing layer 20 is less than 0.01 mm, the adhesive strength will be insufficient and the easily peelable wallpaper will be easily peeled off even without supplying liquid such as water. On the other hand, if the thickness of the re-moisturizing layer 20 is more than 1 mm, there is a possibility that the easily peelable wallpaper 1 will be applied in a position other than the intended location.

<How to apply easy-to-peel wallpaper to a wall>
Next, a method of attaching the easily peelable wallpaper 1 to the wall surface 100 will be described. The method of attaching the easily peelable wallpaper 1 to the wall surface 100 involves first applying an adhesive having re-wetting properties to the back surface 10b of the wallpaper body 10 to provide a re-wetting layer 20. Then, before the re-wetting layer 20 dries, the easily peelable wallpaper 1 is attached to the wall surface 100 and allowed to dry, thereby making it possible to easily attach the easily peelable wallpaper 1 to the wall surface 100.

In addition to this method, for example, a re-wetting adhesive is first applied to the wall surface 100 to provide a re-wetting layer 20 (re-wetting layer formation process). Then, the wallpaper body 10 is adhered onto the re-wetting layer 20 (adhesion process), so that the easily peelable wallpaper 1 can be easily attached to the wall surface 100. Note that the wallpaper body 10 may be adhered after a liquid such as water is supplied to the re-wetting layer 20.

<How to remove wallpaper that is easy to peel off from a wall>
Next, a method for peeling off the easily removable wallpaper 1 from a state in which the easily removable wallpaper 1 is attached to a wall surface 100 as shown in FIG. 1 will be described.

First, as shown in Figure 2, a liquid such as water is supplied to the surface 10a of the wallpaper body 10 (S1). Methods for supplying the liquid include spraying the liquid onto the surface 10a of the wallpaper body 10 or applying the liquid (penetration process).

Water supplied to the surface 10a of the wallpaper body 10 permeates from the surface 10a to the back surface 10b of the wallpaper body 10 (S2) and reaches the rewettable layer 20. The rewettable layer 20 then absorbs the liquid (S3) and begins to lose its adhesive strength (S4). After that, it is left for a while, and when the adhesive strength of the rewettable layer 20 to the wall surface 100 has sufficiently decreased, the end of the easily peelable wallpaper 1 is peeled off from the wall surface 100 (S5). This is continued until the easily peelable wallpaper 1 is completely peeled off from the wall surface 100 (peeling process) (S6), allowing the easily peelable wallpaper 1 to be easily peeled off from the wall surface 100.

Here, it is possible that a portion of the remoisturizable layer 20 (e.g., adhesive contained in the remoisturizable layer 20) remains (adheres) to the wall surface 100, but by spraying or applying the same liquid onto it and leaving it for a while, the adhesive strength between the portion of the remoisturizable layer 20 and the wall surface 100 can be reduced, and it can then be easily removed.

By constructing the easily peelable wallpaper 1 as described above, the easily peelable wallpaper 1 can be easily attached to the wall surface 100, and by supplying a liquid such as water to the surface of the easily peelable wallpaper 1, the easily peelable wallpaper 1 can be easily peeled off from the wall surface 100.

(Embodiment 2)
In the first embodiment, nothing is provided on one surface of the wallpaper body, but a surface layer may be provided. Fig. 3 is a schematic cross-sectional view of the easily peelable wallpaper according to this embodiment in a state where it is attached to a wall surface.

As shown in this figure, the easily peelable wallpaper 1A according to this embodiment has a surface layer 50 provided on one side surface of the wallpaper body 10. Specifically, the surface layer 50 is provided on one side surface of the wallpaper body 10 via an adhesive or the like (not shown). The other configurations are the same as those of the easily peelable wallpaper of embodiment 1.

Here, the surface layer 50 is not particularly limited, and may be colored, liquid-impermeable, or have a multi-layer structure. Examples of the surface layer 50 include painted or printed polyvinyl chloride, plastic (olefin, etc.), wood slices, cork, etc. By providing the surface layer 50, the decorativeness of the easily peelable wallpaper 1A can be improved.

In addition, since vinyl chloride and olefin do not allow liquids to pass through, using these as the surface layer 50 can improve the water resistance of the easy-to-peel wallpaper 1A. Therefore, such easy-to-peel wallpaper 1A can be attached even to walls that are constantly exposed to water.

<How to apply easy-to-peel wallpaper to a wall>
The following method can be used to peel off the easily peelable wallpaper 1A from a state in which the easily peelable wallpaper 1A has been attached to the wall surface 100. First, as in the first embodiment, an adhesive having re-wetting properties is applied to the back surface 10b of the wallpaper body 10 on which the surface layer 50 is provided, to provide a re-wetting layer 20. Then, before the re-wetting layer 20 dries, the easily peelable wallpaper 1A is attached to the wall surface 100 and dried, whereby the easily peelable wallpaper 1A can be easily attached to the wall surface 100.

In addition to this method, for example, a re-wetting adhesive is first applied to the wall surface 100 to provide a re-wetting layer 20 (re-wetting layer formation process). Then, the wallpaper body 10 provided with the surface layer 50 is adhered onto the re-wetting layer 20 (adhesion process), so that the easily peelable wallpaper 1A can be easily attached to the wall surface 100. Note that the wallpaper body 10 may be adhered after supplying a liquid such as water to the re-wetting layer 20.

<How to remove wallpaper that is easy to peel off from a wall>
The following method can be used to peel the easily peelable wallpaper 1A from the wall surface 100. First, a surface layer peeling step is performed to peel the surface layer 50 from the wallpaper body 10, and then the same penetration step and peeling step as in the first embodiment are performed to peel the wallpaper body 10 from the wall surface 100. In this way, the easily peelable wallpaper 1A can be easily peeled from the wall surface 100.

Other Embodiments
In the above-described embodiment, the surface of the easily peelable wallpaper is not colored. However, the surface of the easily peelable wallpaper may be colored, for example, by using an inkjet printer.

In addition, in the above-described embodiment, the surface of the easily peelable wallpaper is not embossed, but it may be embossed. The embossing may be performed using a method similar to that used for embossing conventional wallpaper. By embossing the surface of the easily peelable wallpaper, the unevenness of the base of the building wall or the like is less likely to appear on the surface of the easily peelable wallpaper, thereby improving the aesthetic appearance of the easily peelable wallpaper.

1, 1A Easily peelable wallpaper 10 Wallpaper body 10a Surface (one side) of wallpaper body
10b Back surface (other surface) of wallpaper body
20 Rewetting layer 50 Surface layer 100 Wall surface

Claims (12)

An easily removable wallpaper that can be easily peeled off from a wall surface by allowing a liquid to penetrate from the surface of one side while the other side is attached to the wall surface,
A wallpaper body capable of permeating the liquid from the surface on the one side to the surface on the other side;
a re-wetting layer is provided on the surface of the other side of the wallpaper body, the re-wetting layer being capable of reducing adhesive strength with the wall surface by absorbing the liquid;
The wallpaper body has a plurality of holes formed therein, the holes penetrating from the one surface to the other surface.
1. An easily peelable wallpaper characterized by the above. An easily removable wallpaper that can be easily peeled off from a wall surface by allowing a liquid to penetrate from the surface of one side while the other side is attached to the wall surface,
A wallpaper body capable of permeating the liquid from the surface on the one side to the surface on the other side;
a re-wetting layer is provided on the surface of the other side of the wallpaper body, the re-wetting layer being capable of reducing adhesive strength with the wall surface by absorbing the liquid;
The wallpaper body is a nonwoven fabric containing 5 to 40% by weight of polyester fiber and 60 to 95% by weight of pulp,
the crystallinity of the polyester fiber on the one surface or the other surface of the wallpaper body is lower than the crystallinity of the polyester fiber inside the wallpaper body ;
1. An easily peelable wallpaper characterized by the above. 3. The easily peelable wallpaper according to claim 1 , wherein the wallpaper body has a moisture permeability to the liquid of 600 g/ ^m2 ·24 h or more. 3. The easily peelable wallpaper according to claim 1, wherein the wallpaper body contains at least one of diatomaceous earth, lime plaster and a porous material. 3. The easily peelable wallpaper according to claim 1, wherein the wallpaper body has an elongation in water of 0.5% or less. 3. The easily peelable wallpaper according to claim 1, wherein a surface layer is provided on one surface of the wallpaper body. 3. The easily removable wallpaper according to claim 1, wherein the liquid is water. A method for removing the easily removable wallpaper according to claim 1 or 2 from the wall surface, comprising the steps of:
a penetration step of penetrating the liquid into the easily peelable wallpaper;
A method for removing easily removable wallpaper, comprising: a removing step of removing the easily removable wallpaper from the wall surface. 9. The method for removing easily removable wallpaper according to claim 8 , wherein the liquid contains a surfactant. A method for removing the easily removable wallpaper according to claim 6 from the wall surface, comprising the steps of:
a surface layer peeling step of peeling the surface layer from the wallpaper body;
a penetration step of penetrating the liquid into the easily peelable wallpaper;
A method for removing easily removable wallpaper, comprising: a removing step of removing the easily removable wallpaper from the wall surface. A method for attaching the easily removable wallpaper according to claim 1 or 2 to the wall surface, comprising:
a rewetting layer forming step of forming the rewetting layer on the wall surface;
a bonding step of bonding the wallpaper body to the remoisturizing layer. A method for attaching the easily removable wallpaper according to claim 6 to a wall surface, comprising the steps of:
a rewetting layer forming step of forming the rewetting layer on the wall surface;
a bonding step of bonding the wallpaper body provided with the surface layer to the re-moisturizing layer.