JP2015063854A - Interior sheet for bathroom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interior sheet for a bathroom, which can be easily applied, which makes unevenness of an application surface hardly appear on a surface after application, and which is hardly broken.SOLUTION: An interior sheet for a bathroom, which is applied to a wall surface or a ceiling surface of the bathroom, includes a body layer 2 that is formed from a resin, and first and second reinforcement layers 3 and 4 that are sequentially stacked on the back side of the body layer 2. The two reinforcement layers 3 and 4 each have a sheet-like material including a thread-like body.

Description

  The present invention relates to an interior sheet for a bathroom that is constructed on the wall surface or ceiling surface of a bathroom.

In recent years, renovations have been actively carried out in ordinary houses such as detached houses and condominiums; various facilities such as hotels, health care facilities for the elderly, nursing care facilities, and hospitals. In these buildings, not only rooms and corridors but also bathroom renovations are required.
In particular, the wall surfaces and ceiling surfaces of the bathrooms of the general houses and various facilities are likely to be dirty, easily proliferate with mold and bacteria, and look bad, so they are often targeted for renovation and new construction. For this reason, various methods for easily remodeling the walls and ceiling of the bathroom have been studied.
Generally, interior materials such as porcelain tiles and FRP are constructed on the wall and ceiling of the bathroom. When refurbishing bathroom walls and ceilings, existing interior materials such as porcelain tiles and FRP may be removed and replaced with new interior materials. It is desired to apply a bathroom interior material for renovation.
In recent years, unit baths are often used for bathrooms from the viewpoint of ease of construction. In general, a unit bath is a combination of floor panels, side panels, ceiling panels, bathtubs, wash basins, ventilation equipment, electrical equipment, and the like, which are made of hard resin such as FRP, which constitute the bathroom. It refers to a bathroom that is built in (see, for example, Patent Document 1). In such a unit bath, the surface temperature of the panel made of hard resin tends to be low in the winter, and thus a bathroom interior material having a high contact temperature feeling may be required.

Conventionally, as an interior material for a bathroom, a panel-like wall material (Patent Document 2) and a resin sheet with makeup on the surface are used.
However, it is difficult to cut the panel-like wall material in accordance with the size of the bathroom and the distortion of the wall surface, and it is difficult to carry in and handle it particularly in a narrow bathroom. In addition, since the panel-like wall material has a large thickness, it may not be constructed in relation to the bathtub.
On the other hand, the bathroom interior sheet made of the resin sheet is easy to cut, has good workability, and can be rolled up, so that it can be carried into a narrow bathroom.
However, the conventional interior sheet for a bathroom is made of a single-layer sheet of resin, so it does not have a waist, and wrinkles and irregularities are likely to occur. Therefore, it is difficult for unskilled workers to apply the interior sheet neatly. Furthermore, the interior sheet for bathroom without waist also follows slight irregularities on the construction surface, so that a fine irregular pattern is generated on the surface of the interior sheet after application, and the irregularities are recognized visually or by touch. There is. To prevent this, clean the work surface so that no dust remains, or scrape off with a cutting tool such as a file or grinder, or fill with a putty material to smooth the work surface. Additional work must be done. Moreover, the interior sheet for bathrooms has a relatively low strength and may be broken by a foreign object. When the sheet breaks in this way, moisture in the bathroom enters from there, and the interior sheet may be peeled off, mold or bacteria may be generated, or rust may be generated to deteriorate the structural casing. . Furthermore, it is not preferable in terms of appearance if the wall surface of the bathroom becomes dirty due to generation of mold, bacteria, rust and the like.

JP 2001-32546 A Japanese Patent No. 3939567

  An object of the present invention is to provide an interior sheet for a bathroom which is easy to construct, and is difficult to cause unevenness on the surface after construction and is not easily broken.

  The present inventors have considered increasing the thickness of the vinyl chloride resin layer, considering that the thickness of the conventional bathroom interior sheet is a cause of the above problem. If the thickness of the resin layer is increased, a certain degree of effect is observed for preventing unevenness and breakage of the construction surface, but because it is a hard and heavy interior sheet, it is difficult to construct it. May be peeled off from the edge. Thus, the present invention has been completed by examining various other elements that can solve the above problems even if the resin layer is made relatively small.

  The present invention provides an interior sheet for a bathroom constructed on a wall surface or a ceiling surface of a bathroom, a main body layer formed of a resin, and a first reinforcing layer and a second reinforcing layer that are sequentially laminated on the back surface side of the main body layer. The two reinforcing layers have a sheet-like material including a thread-like body.

In a preferred bathroom interior sheet of the present invention, the two reinforcing layers each independently include at least one selected from a nonwoven fabric, an orthogonal fabric, a woven fabric, and a mesh sheet, and the two reinforcing layers are different from each other. It is a sheet.
In a preferred bathroom interior sheet of the present invention, the first reinforcing layer has an inorganic fiber nonwoven fabric, and the second reinforcing layer has a thermoplastic resin fiber nonwoven fabric.
In a preferred bathroom interior sheet of the present invention, the inorganic fiber nonwoven fabric is a glass fiber nonwoven fabric, and the thermoplastic resin nonwoven fabric is a polyester fiber nonwoven fabric.

  Since the interior sheet for a bathroom of the present invention is provided with two reinforcing layers made of a sheet-like material including a thread-like body, it is easy to handle at the time of construction and can be easily applied even by an unskilled worker. Furthermore, the interior sheet for bathroom according to the present invention is less likely to show unevenness on the construction surface, and is difficult to break. Therefore, by using this interior sheet, the interior sheet can be used in a smooth state for a long period of time. Can build bathroom walls and ceilings.

Sectional drawing of the interior sheet for bathrooms concerning one embodiment of the present invention. Sectional drawing of the interior sheet for bathrooms which concerns on other embodiment of this invention. The reference perspective view explaining the test method of a strength test in an example. In an Example, the reference front view of the apparatus used by the heat insulation test. The graph which shows the result of a heat insulation test.

[Outline of interior sheet for bathroom]
The layer structure of the interior sheet for bathroom of the present invention will be described with reference to the drawings. In this specification, the description “AAA to BBB” means “AAA to BBB”. In each figure, it should be noted that the thickness and size of each layer are different from the actual ones.

In FIG. 1, a bathroom interior sheet 1 includes a main body layer 2 formed of a resin, and a first reinforcing layer 3 and a second reinforcing layer 4 that are sequentially laminated on the back surface side of the main body layer 2. The bathroom interior sheet 1 of the present invention may have other layers in addition to the main body layer 2 and the two reinforcing layers 3 and 4.
In the example shown in FIG. 1, the bathroom interior sheet 1 has a surface protective layer 5, a printed layer 6, a main body layer 2, a first reinforcing layer 3, a binder layer 7, and a second layer in order from the front surface side to the back surface side. A reinforcing layer 4 is laminated.
Moreover, in the other example shown in FIG. 2, the interior sheet 1 for bathrooms is the surface protective layer 5, the printing layer 6, the main body layer 2, the 1st reinforcement layer 3, and the binder layer in order from the surface side to the back surface side. 7, the 2nd reinforcement layer 4 and the back layer 8 are laminated | stacked.
The two reinforcing layers 3 and 4 have a sheet-like material including a thread-like body. Preferably, the 1st reinforcement layer 3 and the 2nd reinforcement layer 4 respectively have at least 1 sort (s) chosen from a nonwoven fabric, a woven fabric, an orthogonal cloth, and a mesh sheet | seat independently. Although the 1st reinforcement layer 3 and the 2nd reinforcement layer 4 may be comprised from the same sheet-like thing, in order to add a different function to an interior sheet, the said 2 reinforcement layers 3 and 4 are different sheet-like. It is preferable that it is a thing.
The resin of the main body layer 2 is preferably embedded in the first reinforcing layer 3, and among the filaments constituting the first reinforcing layer 3, the resin of the first reinforcing layer 3 facing the main body layer 2 is used. More preferably, at least the resin is impregnated around the surface of the filamentous body.
The bathroom interior sheet 1 of the present invention is applied to a bathroom wall surface or a bathroom ceiling surface. Therefore, the interior sheet for bathroom 1 of the present invention can be said to be a bathroom wall sheet or a bathroom ceiling sheet.

[Surface protective layer and printed layer]
The surface protective layer is located on the outermost surface of the interior sheet for bathroom and is a layer that further improves the durability, antifungal property and antibacterial property of the interior sheet.
The printed layer is a layer that imparts designability to the bathroom interior sheet.
The surface protective layer and the printing layer are laminated as necessary.

The surface protective layer is formed from, for example, a resin. The resin is not particularly limited, and examples thereof include various thermoplastic resins such as polyvinyl chloride resin, low density polyethylene resin, high density polyethylene resin, polyester resin, and ethylene vinyl acetate copolymer; unsaturated dicarboxylic acid and many other resins. Unsaturated polyesters such as polyhydric alcohol condensates, methacrylates such as polyester methacrylate, polyether methacrylate, polyol methacrylate, melamine methacrylate, acrylates such as polyester acrylate, epoxy acrylate, urethane acrylate, polyether acrylate, polyol acrylate, melamine acrylate UV curable resin such as; As the resin for the surface protective layer, it is preferable to use a thermoplastic resin because it is excellent in water resistance and flexibility, and it is more preferable to use a vinyl chloride resin because it is relatively inexpensive and easy to process. Moreover, since the resin of the surface protective layer does not hinder the visual recognition of the design of the printed layer, it is preferably transparent or translucent. The thickness of the surface protective layer is not particularly limited, but is, for example, 0.05 mm to 0.50 mm. Yes, preferably 0.08 mm to 0.30 mm, and more preferably 0.1 mm to 0.2 mm.

  The surface protective layer is a paste sol gel method, calender molding method, melting using known equipment such as a roll or calender molding machine, an extruder, an injection molding machine, a blow molding machine, a laminating apparatus, a casting molding apparatus, etc. It can be formed by an extrusion method, a solvent casting method, an inflation method, or the like. Among these, the calender molding method is preferable because a surface protective layer having high strength and high water resistance can be formed.

The printed layer can be formed on the surface of the main body layer by a method such as transferring a printed pattern using a transfer sheet, directly printing, or laminating a printed resin film.
Although the thickness of a printing layer is not specifically limited, For example, they are 2 micrometers-30 micrometers, Preferably, they are 5 micrometers-20 micrometers, More preferably, they are 5 micrometers-15 micrometers.

[Main body layer]
A main body layer is a layer laminated | stacked on the surface side of a reinforcement layer, Comprising: It is the main resin layer of an interior sheet. The main body layer contains a resin as a main component. The resin is not particularly limited as long as the reinforcing layer can be firmly adhered, and a conventionally known resin can be used, and a thermoplastic resin is generally used. The resin constituting the main body layer only needs to be firmly adhered to at least the surface of the reinforcing layer. However, the resin is preferably embedded in the reinforcing layer, and the resin is further included in the reinforcing layer. More preferably, the filamentous body is impregnated. The impregnation means a state in which a resin is attached to the surface of the filamentous body of the reinforcing layer.
Examples of the thermoplastic resin include vinyl chloride resin, olefin resin, vinyl acetate resin such as ethylene-vinyl acetate copolymer, acrylic resin such as ethylene-methacrylate resin, amide resin, ester resin, olefin elastomer, styrene elastomer, and the like. And various elastomers.
In view of excellent flexibility, the main body layer is preferably formed of a vinyl chloride resin as a resin component. An interior sheet having a main body layer mainly composed of a vinyl chloride resin is excellent in flexibility, is easy to construct, and is relatively inexpensive.

The main body layer may be foamed, but is preferably non-foamed in order to impart sufficient water resistance to the interior sheet.
The main body layer usually contains various additives in addition to the resin.
As the additive, conventionally known additives can be used, and examples thereof include an antifungal agent, a filler, a plasticizer, a flame retardant, a stabilizer, an antioxidant, a lubricant, and a colorant.
The filler is not particularly limited, and examples thereof include calcium carbonate, calcium oxide, barium carbonate, magnesium hydroxide, aluminum hydroxide, clay, talc, and mica.
The plasticizer is not particularly limited, and examples thereof include dioctyl phthalate (DOP), dibutyl phthalate (DBP), and butyl octyl phthalate (BOP).
Although content of a filler is not specifically limited, Usually, they are 75 mass parts-105 mass parts with respect to 100 mass parts of resin.

If the content of the filler is too large, the weight of the interior sheet becomes heavy and the main body layer becomes relatively brittle, which may make it difficult to handle during construction. On the other hand, if the content of the filler is too small, the interior sheet becomes hard at low temperatures such as in winter, which may make it difficult to construct, and it is difficult to conceal the color and pattern of the bathroom wall and ceiling. .
Moreover, although content of a plasticizer is not specifically limited, Usually, it is 20 mass parts-100 mass parts with respect to 100 mass parts of resin, Preferably it is 30 mass parts-80 mass parts. When the content of the plasticizer is too large, the main body layer becomes too soft and the strength is reduced, and the plasticizer is easily bleeded. On the other hand, when there are too few plasticizers, a main body layer will become hard and construction of an interior sheet will become difficult.
Although the thickness of a main body layer is not specifically limited, For example, it is 0.15 mm-0.5 mm, Preferably, it is 0.2 mm-0.4 mm, More preferably, it is 0.2 mm-0.3 mm.
The main body layer can be usually formed by a paste sol gelation method, a calendar molding method, a melt extrusion method, or the like. Among these, when a vinyl chloride resin is used, it is preferably formed by a paste sol gelation method because the layer thickness can be easily set and foaming and non-foaming of the layer can be selected as appropriate.

[Two reinforcing layers]
Each of the two reinforcing layers is a sheet-like material including a thread-like body. The two reinforcing layers may be the same, but preferably different sheet-like materials are used.
The sheet-like material including the filamentous body is, for example, a nonwoven fabric formed by randomly or regularly entwining the filamentous body into a sheet shape; weaving or knitting a filamentous body such as plain weave, twill weave, or entangled weave (skin weave). Woven cloth formed in a sheet form; an orthogonal cloth formed by crossing a filamentous body (without wefting warp and weft) into a sheet and fixing the filamentous body with a binder at the intersection; consisting of a filamentous body having a mesh Mesh sheet; and the like. In addition, what is generally called a mat | matte is also contained in a nonwoven fabric. The filamentous body is also called “fiber” when it is used for a nonwoven fabric, “thread” when it is used for a woven fabric, and “filament” when it is used for an orthogonal fabric or a mesh sheet.

The material of the filament is not particularly limited, and includes thermoplastic resin fibers such as polyester resin, polyolefin resin, aramid resin, and acrylic resin; inorganic fibers such as glass and carbon; natural fibers such as cotton, hemp, and animal hair. Can be mentioned.
The nonwoven fabric is not particularly limited, and examples thereof include a spunbond nonwoven fabric, a thermal bond nonwoven fabric, a chemical bond nonwoven fabric, a needle punch nonwoven fabric, and a spunlace nonwoven fabric.
The woven fabric is not particularly limited, and examples thereof include plain weave, twill weave, and satin weave.
The orthogonal cloth is formed by alternately stacking a first layer composed of a plurality of filaments arranged in approximately one direction and a second layer composed of a plurality of filaments arranged in a direction substantially orthogonal to the one direction. In addition, there may be mentioned those in which the intersections of the filaments of the first layer and the second layer are adhesively bonded or heat-sealed. As a commercial item of the said orthogonal cloth, the brand name "Kuranet" by Kurabo Industries, etc. are mentioned.
The mesh sheet refers to a sheet made of natural fibers or synthetic fibers knitted, woven or molded so as to have a mesh, and the material thereof is not particularly limited. For example, vinylon fiber, polyester fiber, nylon fiber, polyethylene fiber, Acrylic fiber, rayon fiber, aramid fiber, cotton, hemp, etc. are mentioned. Specific examples of the mesh sheet include fabrics used in mosquito nets manufactured by Koshu Sangyo Co., Ltd.
The two reinforcing layers preferably include a non-woven fabric using thermoplastic resin fibers or a non-woven fabric using inorganic fibers as the filamentous body.
When the reinforcing layer is a thermoplastic resin fiber nonwoven fabric or an inorganic fiber nonwoven fabric, the filaments constituting the nonwoven fabric may be either short fibers or long fibers. The basis weight of the nonwoven fabric is not particularly limited, is preferably ^{30g / m 2 ~50g / m 2} .

In particular, the first reinforcing layer preferably has an inorganic fiber nonwoven fabric such as glass, and the second reinforcing layer preferably has a thermoplastic resin fiber nonwoven fabric such as a polyester resin. The inorganic fiber nonwoven fabric may be not only inorganic fibers but also inorganic fiber nonwoven fabrics (for example, pulp-mixed glass mats) in which inorganic fibers and natural fibers such as pulp are mixed.
An inorganic fiber non-woven fabric such as a glass fiber non-woven fabric hardly changes its shape even when it receives heat, and can impart dimensional stability to the interior sheet. On the other hand, a thermoplastic resin fiber nonwoven fabric such as a polyester resin fiber nonwoven fabric tends to shrink when it receives heat, but can impart mechanical strength to the interior sheet. And the interior sheet of this invention has the 1st reinforcement layer and the 2nd reinforcement layer arrange | positioned in order on the back surface side of the main body layer which consists of resin. As described above, since the first reinforcing layer including the inorganic fiber nonwoven fabric is unlikely to change in shape, when heat or the like is applied to the interior sheet, the main body layer and the second reinforcing layer have a larger shrinkage as they move away from the first reinforcing layer. Become. For this reason, the main body layer warps in a concave shape on the front surface side, and the second reinforcing layer warps in a concave shape on the back surface side. By using an inorganic fiber non-woven fabric as the first reinforcing layer and a thermoplastic resin fiber non-woven fabric as the second reinforcing layer, warpage of the main body layer and the second reinforcing layer is antagonized, and excellent in dimensional stability and mechanical strength and warpage. A difficult interior sheet can be obtained.

[Binder layer]
A binder layer is a layer for interposing between two reinforcement layers and bonding both reinforcement layers.
The binder layer is formed of a resin that can be bonded to the two reinforcing layers. For example, polyethylene, polyethylene ethylene-propylene copolymer, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol copolymer, polyvinyl alcohol, or the like is used. it can. Since the adhesiveness is excellent, it is preferable to use polyethylene as the binder layer.

[Back layer]
The back surface layer is provided as necessary to impart adhesiveness and the like, and can exert a desired effect on the back surface of the bathroom interior sheet.
The back surface layer can be formed using, for example, a resin exemplified in the main body layer.

[Uses and effects of interior sheet for bathroom of the present invention]
The interior sheet of the present invention is used when repairing a wall surface or ceiling surface of a bathroom such as a condominium, a hotel, or a general house, or by pasting on a wall surface or ceiling surface of a new bathroom.
The bathroom interior sheet of the present invention is provided with two reinforcing layers made of a sheet-like material including a thread-like body. The reinforcing layer including the filament has fine voids inside. Even when this reinforcing layer is laminated on the main body layer, fine voids remain inside the reinforcing layer, so that the specific gravity of the reinforcing layer is smaller than that of a resin layer such as vinyl chloride resin. Therefore, the interior sheet of the present invention is lighter and more flexible than the case where the entire interior sheet is formed of a resin layer. The light and flexible interior sheet of the present invention is easy to handle at the time of construction and can be easily pasted even by unskilled workers.
Furthermore, since the interior sheet for bathrooms of the present invention is provided with two reinforcing layers, unevenness of the construction surface hardly appears on the surface after construction. For this reason, when attaching an interior sheet, additional work, such as cleaning of a construction surface (a wall surface and a ceiling surface), and smooth repair, can be omitted as much as possible.
Moreover, since the interior sheet for bathrooms of this invention is provided with two reinforcement layers, it is excellent in mechanical strength and can disperse or absorb the impact even if a foreign object hits. For this reason, at the time of construction, it is difficult to inadvertently break the interior sheet, and after construction, moisture can be prevented from entering due to tearing.

Furthermore, since the interior sheet for bathroom of the present invention is excellent in dimensional stability, there is no risk of opening joints between the sheets after construction, and since the warpage is small and the weight is relatively light, the edge of the sheet Hard to peel off. In particular, an interior sheet using an inorganic fiber nonwoven fabric as the first reinforcement layer and a thermoplastic resin fiber nonwoven fabric as the second reinforcement layer is excellent in dimensional stability and warpage prevention effect. That is, since the inorganic fiber nonwoven fabric which is the first reinforcing layer has a small shrinkage due to heat, it is possible to suppress the dimensional change of the entire bathroom interior sheet. Thereby, since the opening of the joint of the interior sheet for bathroom after construction can be prevented, the generation of mold at the joint and the adhesion of dirt can be suppressed. Moreover, since the thermoplastic resin fiber nonwoven fabric which is a 2nd reinforcement layer is located in the back surface side of a 1st reinforcement layer, and shows the thermal behavior similar to resin of the surface side of a 1st reinforcement layer, the temperature of the interior sheet for bathrooms Warpage due to change can be prevented.
In addition, since the interior sheet for bathrooms of this invention is provided with two reinforcement layers, it is excellent in heat insulation and can anticipate the dew condensation prevention effect.

  Examples of the present invention and comparative examples are shown below. However, the present invention is not limited to the following examples.

[Materials used]
(Surface protective layer forming material)
A vinyl chloride resin sheet (calendar sheet manufactured by Hiroshima Chemical Industry Co., Ltd.) having a thickness of 0.15 μm was used. The main component of this sheet is composed of 100 parts by mass of vinyl chloride resin (average polymerization degree 1,100) and 35 parts by mass of plasticizer (DOP).
(Print layer forming material)
A transfer sheet (manufactured by Toppan Cosmo) was used.

(Body layer forming material)
100 parts by weight of vinyl chloride resin paste (vinyl chloride paste with an average degree of polymerization of 1,200: vinyl chloride paste with an average degree of polymerization of 1,000 = 80: 20 (mass ratio)), 63 parts by weight of filler (calcium carbonate), , 45 parts by mass of a plasticizer (DOP) and 15 parts by mass of a white pigment (titanium oxide) were used.
The viscosity at 20 ° C. of the main body layer forming material was 4,000 Pa · s as measured using a viscometer (trade name “Bisco Tester” manufactured by Rion Co., Ltd.).

(First reinforcement layer)
A glass fiber nonwoven fabric (trade name “Grabest” manufactured by Olivest Co., Ltd.) was used. The basis weight of this glass fiber nonwoven fabric was 53 g / m ² .
(Binder layer forming material)
Polyethylene resin was used.
(Second reinforcement layer)
A polyester fiber spunbonded nonwoven fabric (trade name “Ecule” manufactured by Toyobo Co., Ltd.) was used. The basis weight of this polyester fiber spunbonded nonwoven fabric was 30 g / m ² .

[Example 1]
On the second reinforcing layer, a binder layer forming material is melt extruded and laminated into a film shape having a thickness of about 30 μm, and then the first reinforcing layer is overlaid thereon to form a second reinforcing layer / binder layer / first reinforcing layer. A laminate comprising: A main body layer forming material was applied onto the first reinforcing layer of the laminate, and a coating film of the forming material was formed while impregnating some of the main body layer forming material into the first reinforcing layer. Then, the main body layer forming material was pregelled by heating within a range of 130 ° C. to 150 ° C. for 1 minute using a ceramic heater, thereby forming a main body layer having a thickness of 0.25 mm. On this main body layer, the printing of the transfer sheet, which is a printing layer forming material, is transferred, heated for 30 seconds within a range of 130 ° C. to 150 ° C., and further, a surface protective layer forming material is formed thereon. A vinyl chloride resin sheet was laminated to form a surface protective layer having a thickness of 0.15 mm. Furthermore, the main body layer was completely gelatinized by heating the whole within the range of 130 ° C. to 150 ° C. for 3 minutes.
In this way, a bathroom interior sheet having a layer structure shown in FIG. 1 was produced. The thickness of the entire interior sheet obtained was about 0.8 mm.

[Comparative example]
A commercially available interior sheet (trade name “Reartec TA-7319” manufactured by Sangetsu Co., Ltd.) was stacked four times, and each sheet was bonded with an adhesive, and used as a comparative example. This interior sheet has a thickness of 0.2 mm in which an adhesive is applied to the back surface of a vinyl chloride resin sheet. Therefore, the sheet of the comparative example in which four sheets are bonded together can be regarded as an interior sheet having a thickness of 0.8 mm.

[Strength test]
In order to confirm the strength of each interior sheet of Example 1 and Comparative Example, the following test was performed.
As a construction surface, a steel plate having a thickness of 0.8 mm, a length of 150 mm, and a width of 70 mm coated with a vinyl chloride resin was prepared. On this steel plate, the interior sheet was affixed using a polyurethane adhesive. The interior sheet together with this steel plate was installed at an angle of 30 degrees with respect to the horizontal plane. After the fall height is 150 mm and a weight of 180 g having an arcuate tip of thickness × length × width = 1 mm × 6 mm × 24 mm is naturally dropped onto the surface of the interior sheet, as shown in FIG. Was visually observed. The results are shown in Table 1. Further, the same test was performed with the drop height changed as shown in Table 1.

  As is clear from the strength test, the interior sheet of Example 1 was not torn even when the weight was dropped from the height of 150 mm, but the interior sheet of the comparative example was torn at the stage where the weight was dropped from the height of 150 mm. Oops.

[Surface smoothness test]
In order to confirm whether or not unevenness of the construction surface appears in each interior sheet of Example 1 and Comparative Example, the following three types of tests were performed.
In the table, ◯ indicates that the protrusion cannot be confirmed, Δ indicates that the protrusion can be confirmed slightly, and x indicates that the protrusion can be clearly confirmed.
(Test Example 1)
A protrusion having a height of 0.05 mm was formed on the surface of the steel sheet by attaching a tape having a thickness of 0.05 mm, a length of 20 mm, and a width of 20 mm to the surface of the steel sheet. After covering the tape and pasting the interior sheet with polyurethane adhesive, observe the surface of the interior sheet with illumination light from an oblique direction and touch the surface with your fingers The presence or absence was confirmed. The results are shown in Tables 2 and 3. However, Table 2 shows the result of visual observation, and Table 3 shows the result of touching with a finger. Further, the tapes were stacked and pasted to form protrusions having heights as shown in Tables 2 and 3, and the same test was performed.

(Test Example 2)
A plate made of vinyl chloride resin having a thickness of 3.0 mm was prepared as a construction surface. A linear groove having a width of 0.1 mm and a depth of 1.0 mm was formed on the surface of the resin plate. After the interior sheet is attached to the surface of the resin plate using a polyurethane-based adhesive so as to cover this groove, the surface of the interior sheet is visually observed while applying illumination light from an oblique direction, and the surface Was touched with a finger to confirm the presence or absence of protrusions. The results are shown in Tables 4 and 5. Furthermore, the same test was performed by changing the width of the groove formed in the resin plate as shown in Tables 4 and 5.

(Test Example 3)
A plate made of vinyl chloride resin having a thickness of 3.0 mm was prepared as a construction surface. A circular hole having a diameter of 1.0 mm and a depth of 3.0 mm was formed on the surface of the resin plate. After the interior sheet is attached to the surface of the resin plate with a polyurethane adhesive so as to cover this hole, the surface of the interior sheet is visually observed while illuminating illumination light from an oblique direction. Was touched with a finger to confirm the presence or absence of protrusions. The results are shown in Tables 6 and 7. Furthermore, the same test was performed by changing the diameters of the holes formed in the resin plate as shown in Tables 6 and 7.

  As apparent from the surface smoothness test, the interior sheet of Example 1 showed almost no unevenness in the construction surface, but the interior sheet of the comparative example was easily affected by the unevenness in the construction surface.

[Insulation test]
In order to confirm the heat insulation properties of the interior sheets of Example 1 and Comparative Example, the following test was performed.
The interior sheet was affixed to the entire body of a cylindrical iron can having a diameter of 110 mm and a height of 75 mm using a polyurethane adhesive. The can was filled with water with ice.
On the other hand, as shown in FIG. 4, a digital weighing scale on which a foamed polystyrene plate was placed on a weighing pan was disposed between the left and right pedestals fixed on a horizontal plane. The gap between the left and right pedestals and the polystyrene foam plate was made almost free from contact, so that the upper surface of the pedestal and the upper surface of the polystyrene foam were at the same level. A can with an interior sheet containing the ice water is placed on the foamed polystyrene plate, and a container containing 1 liter of 98 ° C. hot water is placed on the pedestal, and then the can and the boiling water container are covered and 2 A hollow rectangular parallelepiped sealing cover having a bottom opening type of 50 cm in length, 32 cm in width, and 30 cm in height was placed so as to straddle one pedestal. In this test apparatus, the humidity in the hermetic cover is approximately 100% due to the water vapor from the hot water, condensation occurs on the surface of the interior sheet cooled with ice water, and the amount of the condensed water is displayed on the digital weighing scale. . The value of the digital weigh scale (the weight of condensed water) was read every minute, and the value was converted per square meter of the interior sheet. The average value of the results of performing this test three times for each interior sheet is shown in the graph of FIG. In addition, in FIG. 5, a blank is a result when the same test is performed without winding an interior sheet around the trunk of the can.
As is clear from FIG. 5, it can be seen that the interior sheet of Example 1 is difficult to condense.

[Example 2]
On the second reinforcing layer, a binder layer forming material is melt extruded and laminated into a film shape having a thickness of about 30 μm, and then the first reinforcing layer is overlaid thereon to form a second reinforcing layer / binder layer / first reinforcing layer. A laminate comprising: On the first reinforcing layer of this laminate, a tack sheet having a thickness of 0.2 mm (trade name “Riatec TA-7319” manufactured by Sangetsu Co., Ltd., the material of which is made of vinyl chloride resin) is attached. A sheet of Example 2 consisting of 2 reinforcing layers / binder layer / first reinforcing layer / commercially available interior sheet was produced. The total thickness of the obtained sheet was about 0.6 mm. The commercially available interior sheet of Example 2 corresponds to the main body layer.

[Reference example]
By attaching one sheet of a commercially available interior sheet (trade name “Riatec TA-7319” manufactured by Sangetsu Co., Ltd., the material of the sheet is vinyl chloride resin) used in the comparative example on the first reinforcing layer, A sheet of a reference example including the first reinforcing layer / commercially available interior sheet was prepared. The total thickness of the reference example sheet was about 0.5 mm.

[Warp test]
In order to confirm the warpage of the sheets of Examples 1 and 2 and the reference example, the following test was performed.
The sheet was cut into a length of 300 mm and a width of 300 mm to prepare a test piece.
The test piece was allowed to stand on a horizontal plane, and the distance (vertical length) between one edge of the test piece and the horizontal plane was measured. Next, about the test piece, the surface of the interior sheet and the back surface of the tack film were each heated for 30 seconds using a jet heater. In addition, when it heats with this heater, each surface temperature of an interior sheet and a tack film is heated to 40-50 degreeC. After heating, the test piece was allowed to stand on a horizontal plane, and the distance between one edge of the test piece and the horizontal plane was measured in the same manner as before heating. And the distance after a heating-the distance before a heating was computed, and this was made into the curvature value (mm). As a result, the interior sheet of Example 1 has a warp value of 0 mm, the interior sheet of Example 2 has a warp value of 5.0 mm, and the interior sheet of the reference example has a warp value of 19.0 mm. It was.
From this, it can be seen that the interior sheet of the present invention having two reinforcing layers as in Examples 1 and 2 is less likely to warp. It is considered that although the main layer is warped by heating, the warp is antagonized by warping the second reinforcing layer to the opposite side, and as a result, the warp is hardly generated as a whole.
Moreover, since the interior sheet of Example 1 is impregnated with the main body layer forming material (vinyl chloride resin) in at least the surface portion of the first reinforcing layer, the main body layer and the first reinforcing layer 3 are physically integrated, It is presumed that the dimensional stability against heat is high and no warpage has occurred.

  The interior sheet for a bathroom of the present invention is used by being attached to a wall surface or ceiling surface of a bathroom of a general house, a condominium, a hotel or the like.

  DESCRIPTION OF SYMBOLS 1 ... Bathroom interior sheet, 2 ... Main body layer, 3 ... 1st reinforcement layer, 4 ... 2nd reinforcement layer, 5 ... Surface protective layer, 6 ... Printing layer, 7 ... Binder layer

Claims (4)

In the interior sheet for the bathroom constructed on the wall or ceiling of the bathroom,
A main body layer made of resin, and a first reinforcing layer and a second reinforcing layer laminated in order on the back surface side of the main body layer,
The interior sheet for a bathroom, wherein the two reinforcing layers have a sheet-like material including a filamentous body.   The two reinforcing layers each independently have at least one selected from a nonwoven fabric, a woven fabric, an orthogonal fabric, and a mesh sheet, and the two reinforcing layers are different from each other in sheet form. The interior sheet for bathroom as described.   The interior sheet for bathroom according to claim 1 or 2, wherein the first reinforcing layer has an inorganic fiber nonwoven fabric and the second reinforcing layer has a thermoplastic resin fiber nonwoven fabric.   The interior sheet for bathroom according to claim 3, wherein the inorganic fiber nonwoven fabric is a glass fiber nonwoven fabric, and the thermoplastic resin nonwoven fabric is a polyester fiber nonwoven fabric.

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