Wallpaper

Abstract

To contribute to Target 12.5 of Goal 12 of the SDGs, "Significantly reduce waste generation through prevention, reduction, recycling, and reuse of waste," and to provide wallpaper with a simplified structure and manufacturing method for efficiently containing shell powder, which is a recycled material. 【Solution means】The wallpaper 1 according to the present disclosure has a backing paper 11 and a paint layer 12 provided on the backing paper 11, and the paint layer 12 contains a synthetic resin emulsion excluding PVC and a crushed shell material.

Description

Technical Field

[0001] The present invention relates to wallpaper.

Background Art

[0002] Conventionally, there have been known techniques using shell powder as a filler for paper materials and wallpapers including a synthetic resin layer containing shell powder.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the above-described techniques and wallpapers have a problem in that their configurations and manufacturing methods are complex.

[0005] Therefore, the present disclosure has been made in view of the above problems, and contributes to Target 12.5 of SDGs Goal 12, "Take responsibility for production and consumption," which aims to "substantially reduce waste generation through prevention, reduction, recycling, and reuse of waste," and provides a wallpaper with a simplified configuration and manufacturing method for efficiently containing shell powder, which is a recycled material.

Means for Solving the Problem

[0006] The first feature of the present disclosure is wallpaper, which has a backing paper and a paint layer provided on the backing paper, and the paint layer contains a synthetic resin emulsion excluding PVC and a ground shell material.

Effect of the Invention

[0007] According to the present disclosure, it is possible to provide wallpaper that contributes to Target 12.5 of SDGs Goal 12, "Take responsibility for production and consumption", which is to "significantly reduce waste generation through prevention, reduction, recycling and reuse of waste", and simplifies the structure and manufacturing method for efficiently containing shell powder, which is a recycled material.

Brief Description of the Drawings

[0008]

Figure 1

Mode for Carrying Out the Invention

[0009] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the ratios of the respective dimensions are different from the actual ones. Therefore, specific dimensions and the like should be determined with reference to the following description. Also, there may be parts where the relationships and ratios of the dimensions are different between the drawings. In this specification and the drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals, and redundant descriptions are omitted, and elements not directly related to the present invention are not shown.

[0010] (First Embodiment) Hereinafter, with reference to FIG. 1, the wallpaper 1 according to the first embodiment of the present invention will be described. FIG. 1 is a cross-sectional view showing an example of the layer structure of the wallpaper 1 according to this embodiment.

[0011] The wallpaper 1 may be a paper-based wallpaper, a fiber-based wallpaper, a plastic-based wallpaper, or an inorganic-based wallpaper.

[0012] Here, the paper-based wallpaper is a wallpaper mainly made of paper (ordinary paper, fire-retardant paper, or paper cloth).

[0013] Also, the fiber-based wallpaper is a wallpaper mainly made of organic fibers. Specifically, the fiber-based wallpaper may be a wallpaper mainly made of vegetable fibers or cellulose-based recycled fibers such as rayon (including blended or woven with chemical fibers), a wallpaper mainly made of chemical fibers (acrylic, polyester, etc.), or a wallpaper mainly made of animal fiber fabrics.

[0014] Also, the plastic-based wallpaper is a wallpaper mainly made of plastics excluding vinyl chloride resin. Furthermore, the inorganic-based wallpaper is a wallpaper mainly made of inorganic materials such as inorganic paper, inorganic aggregates, and glass fibers.

[0015] As shown in FIG. 1, the wallpaper 1 according to this embodiment has a backing paper 11 and a paint layer 12 provided on the backing paper 11.

[0016] The backing paper 11 is the base material of the wallpaper 1 and is formed using ordinary paper, fire-retardant paper, inorganic paper, woven fabric, non-woven fabric, etc. containing pulp. Note that the configuration of the backing paper 1 is not particularly limited as long as it has mechanical strength, heat resistance, etc. suitable as the base material of the wallpaper 1.

[0017] The coating layer 12 contains a ground product of unburned or burned shells. Such shells are not particularly limited, and shells such as oyster, clam, scallop, turban shell, ark shell, short-necked clam, abalone, and mussel can be used. Among these, it is particularly preferable to use scallop shells, which are excellent in antibacterial and bactericidal properties against Trichophyton (athlete's foot fungus). In addition, since impurities such as dust are less likely to adhere to the surface of scallop shells, it is easy to use because there is no need to perform an operation to remove impurities as a pretreatment when producing a ground product of shells.

[0018] Here, the average particle size of the ground product of shells contained in the coating layer 12 is preferably in the range of 0.1 to 100 μm.

[0019] An example of the process for producing such a ground product of shells is as follows.

[0020] First, a coarse grinding step of grinding the shell into a ground product of shells with an average particle size of 5 to 100 mm is performed. In the coarse grinding step, it is sufficient if the shell can be coarsely ground into a ground product with a size of about 5 to 100 mm that is easy to handle, and any dry mechanical grinding means can be adopted. For example, a rotary vane mill or the like can be adopted.

[0021] Second, a firing step of firing the ground product of shells at 600 to 1000 °C for 1 to 15 hours is performed. In the firing step, any firing means can be adopted as long as the ground product of shells can be fired at 600 to 1000 °C for 1 to 15 hours. For example, a batch-type kiln such as an electric furnace used for firing ceramics or a continuous kiln such as a tunnel kiln can be adopted. When firing, the reason for setting the temperature to 600 to 1000 °C and the time to 1 to 15 hours is that the temperature at which calcium carbonate, which is the main component of unburned shells, is converted to calcium oxide is about 900 °C.

[0022] Thirdly, a fine pulverization step is performed in which the fired shell fired product is pulverized into a shell pulverized product having an average particle size of 0.1 to 100 μm. In the fine pulverization step, any pulverization means can be employed as long as shell fine powder having a particle size of 0.1 to 100 μm is finally obtained. Preferably, however, the fired shell fired product after firing is pulverized by a pulverization method of at least two steps.

[0023] Specifically, the fine pulverization step is further divided into a first pulverization step and a second pulverization step. In the first pulverization step, it is preferable to use a rolling ball mill, a planetary ball mill, a tube mill, a hammer mill for fine pulverization, or the like. In the second pulverization step, it is preferable to further pulverize the pulverized product of the first pulverization step with a jet mill or the like. Further, for the jet mill used in the second pulverization step, it is preferable to install a device having a classification ability such as a cyclone in a closed circuit.

[0024] As described above, by performing the fine pulverization step after the firing step, it is possible to efficiently pulverize into a shell pulverized product, so that it is possible to efficiently obtain a shell pulverized product capable of efficiently decomposing dioxin and formaldehyde.

[0025] Furthermore, by using a rolling ball mill or the like in the first pulverization step, it becomes possible to apply sufficient impact force, compressive force, and shear force to the fired shell product. By using a jet mill in the second pulverization step, it becomes possible to promote the collision between the fired shell products and the collision with the jet mill wall surface, and it is possible to quickly and easily obtain a shell pulverized product pulverized into a desired shape and size.

[0026] And, by installing a classification device or the like in a closed circuit in the jet mill in the second pulverization step, if particles having a large particle size are classified and removed, it is possible to obtain a shell pulverized product having a more uniform particle size with a smaller average particle size at the maximum particle size, so that a higher quality shell pulverized product can be obtained.

[0027] In addition, the paint layer 12 contains a synthetic resin emulsion other than PVC (polyvinyl chloride). In recent years, the number of cases of sick house syndrome caused by volatile organic compounds (hereinafter referred to as VOCs) emitted from building materials and the like has been increasing.

[0028] Since adhesives mainly composed of PVC often contain volatile organic solvents, when an adhesive mainly composed of PVC is used in wallpaper manufacturing, VOCs (volatile organic compounds) are generated, leading to problems such as deterioration of the working environment, and the problem that wallpapers with residual VOCs are supplied to general living spaces, resulting in a lower safety level of the indoor environment of houses and the like. Therefore, it is preferable to use a synthetic resin emulsion other than PVC in the paint layer 12.

[0029] For example, examples of the synthetic resin emulsion include aqueous resin emulsions such as acrylic resin emulsion, vinyl acetate resin emulsion, acrylic-styrene resin emulsion, acrylic-vinyl acetate resin emulsion, silicone acrylic-fluorine acrylic emulsion, and urethane resin emulsion.

[0030] In addition, as the synthetic resin emulsion, it is preferable to use an acrylic resin emulsion or a vinyl acetate resin emulsion in terms of versatility or the uniform dispersibility of the crushed shell powder in the resin emulsion.

[0031] Hereinafter, an example of the process of forming the paint layer 12 on the backing paper 11 will be described.

[0032] First, a paint is manufactured from the above-mentioned crushed shell powder, the above-mentioned synthetic resin emulsion, diatomaceous earth, titanium oxide, inorganic pigments, flame retardants, and the like.

[0033] Second, such paint is sprayed onto the backing paper 11. Alternatively, such paint may be applied to the backing paper 11 by a known method such as gravure coating, bar coating, spray coating, roll coating, reverse roll coating, comma coating, or the like.

[0034] Thirdly, the backing paper 11 coated with the paint is dried.

[0035] Further, the paint layer 12 may be a paste-like paint layer containing titanium oxide as a pigment while mainly composed of a powdery porous inorganic mineral on the backing paper 11.

[0036] According to such a configuration, there is an effect that the crushed shell material, which is a recycled material, can be efficiently attached to the wallpaper 1.

[0037] According to such a configuration, there is an effect that a deodorizing and antibacterial effect can be realized by using the crushed shell material.

[0038] Also, according to such a configuration, there is an effect that the air permeability and moisture retention of the wallpaper 1 can be improved.

[0039] Furthermore, according to such a configuration, by mixing the crushed shell material into the paint, the labor of attaching the crushed shell material to the backing paper or the resin layer using an adhesive can be omitted, and there is an effect that the production efficiency is improved.

[0040] Wallpaper 1m 2 The weight of the crushed shell material around is preferably 10% to 50% of the weight of the wallpaper 1.

[0041] Here, for the wallpaper 1m 2 If the weight of the crushed shell material around is less than 10% of the weight of the wallpaper 1, it has been found that the effects according to the configuration of the present embodiment cannot be achieved.

[0042] On the other hand, since the unit price of the crushable shell material that can be recycled is higher than that of ordinary calcium carbonate, for the wallpaper 1m 2 If the weight of the crushed shell material around is 50% or more of the weight of the wallpaper 1, the manufacturing cost of the wallpaper 1 will increase significantly.

[0043] Also, recycled materials may be used in the backing paper 11. Here, the content ratio of the recycled materials in the backing paper 11 is preferably 5% to 100%. The inventor has found that when the content ratio of the recycled materials in the backing paper 11 is 30% or more, the desired strength of the backing paper 11 cannot be maintained.

[0044] According to such a configuration, by using recycled paper for the backing paper 11, the usage ratio of the recycled materials in the wallpaper 1 can be improved.

[0045] According to the present embodiment, it is possible to realize the wallpaper 1 including shell powder and recycled paper, which are recycled materials, in the backing paper with a simplified configuration and manufacturing method. Therefore, it can contribute to Target 12.5 of Goal 12 of the SDGs, "Significantly reduce waste generation through prevention, reduction, recycling, and reuse of waste", in "Responsibility to produce and responsibility to use".

[0046] Although the present invention has been described in detail using the above-described embodiments, it is obvious to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention as defined by the claims of the utility model registration. Therefore, the description of this specification is for the purpose of illustration and has no restrictive meaning for the present invention.

Explanation of Reference Numerals

[0047] 1... Wallpaper 11... Backing paper 12... Paint layer

Claims

1. a backing paper, and a paint layer provided on the backing paper, and the paint layer contains a synthetic resin emulsion excluding PVC and a ground shell material, a wallpaper.

2. The wallpaper according to claim 1, wherein the synthetic resin emulsion is an acrylic resin emulsion or a vinyl acetate resin emulsion.

3. The wallpaper 1m ２ The weight of the shell powder around is 10% to 50% of the weight of the wallpaper. The wallpaper according to claim 1.

4. The wallpaper according to claim 1 or 2, wherein a recycled material is used in the backing paper.

5. The wallpaper according to claim 3, wherein the content ratio of the recycled material in the backing paper is 5% to 100%.

6. The wallpaper according to claim 1, wherein the content ratio of the recycled material used in the backing paper and the paint layer is 15% to 80%.

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