Wallpaper

Abstract

To provide a wallpaper which can be easily attached to a wall surface by heating an adhesive layer, can easily correct positional deviation before the adhesive layer is solidified, and can be easily peeled off from the wall surface by heating the adhesive layer.SOLUTION: The wallpaper comprises a wallpaper body made of paper or a nonwoven fabric as a base material and an adhesive layer provided on the other side of the wallpaper body, and is attached to or peeled off from a wall surface after heating the adhesive layer. The open time of the adhesive contained in the adhesive layer falls within the range of 60 s to 1500 s.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to wallpaper having an adhesive layer, and in particular to wallpaper that can be easily attached to a wall surface by heating the adhesive layer, that can easily correct any misalignment before the adhesive layer hardens, and that can also be easily peeled off from the wall surface by heating the adhesive layer. [Background technology]

[0002] BACKGROUND ART Conventionally, wallpapers that are easy to apply to wall surfaces and wallpapers that allow easy replacement have been proposed.

[0003] For example, Patent Document 1 discloses wallpaper having a substrate primarily made of cellulose material, one side of which is laminated with a hot-melt adhesive layer made of hot-melt resin; the hot-melt adhesive layer of the wallpaper is adhered to gypsum board and heated at 100°C for 1 minute, and the 90-degree peel strength measured in accordance with JIS K 6854-1 is 5N / 50mm to 12N / 50mm; and when the storage modulus of the hot-melt resin at temperature T1°C is G1 and the storage modulus at temperature T2°C is G2, the temperatures T1°C and T2°C satisfy G2 / G1≧1000 and T2-T1≦40. This wallpaper is less likely to warp or wrinkle due to drying shrinkage during installation, does not require energy for drying, and can be easily aligned, temporarily fixed, removed, and replaced. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-169397 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the wallpaper in Patent Document 1 has the problem that the adhesive layer tends to harden when it is applied, and if the application position is misaligned from the intended position after application, it is difficult to correct (correct the misalignment). Another problem is that it takes time to peel the wallpaper from the wall surface.

[0006] In view of the above-mentioned circumstances, the present invention aims to provide wallpaper that can be easily attached to a wall surface by heating the adhesive layer, that can easily correct any misalignment before the adhesive layer hardens, and that can also be easily peeled off from the wall surface by heating the adhesive layer. [Means for solving the problem]

[0007] The inventors of the present invention have continued to conduct extensive research into the above-mentioned problems and have discovered the following revolutionary wallpaper.

[0008] The first aspect of the present invention for solving the above problems is a wallpaper body having a base material of paper or nonwoven fabric (wallpaper having a surface layer mainly composed of plastic (including vinyl chloride resin) on one side of the wallpaper body) and a 20 g / m 2 The wallpaper comprises a wallpaper having a surface layer made of the above plastic (excluding wallpapers having a surface layer made of vinyl chloride resin) and an adhesive layer provided on the other side of the wallpaper body, and is attached to a wall surface or peeled off from the wall surface after the adhesive layer is heated, and is characterized in that the open time of the adhesive contained in the adhesive layer is in the range of 60 seconds to 1500 seconds.

[0009] Here, "open time" refers to the time measured using the following measurement method. First, adhesive heated to 150°C is applied in a bead shape to a 5 cm square piece of corrugated cardboard (B flute, K5 on the front, K5 on the back) using a nozzle-type applicator so that the amount applied is 1 g / m, and the piece is left to stand for 1 minute at room temperature (25°C). Next, another 5 cm square piece of corrugated cardboard of the same type is pressed against the adhesive-coated surface at 0.1 MPa for 4 seconds. The other piece of corrugated cardboard is then peeled off vertically, and the adhesive strength of the adhesive is measured. The open time is then determined as the maximum time from when the adhesive was applied to the corrugated cardboard until an adhesive strength of 4.0 kg or more is achieved.

[0010] As will be described later, the properties of the adhesive used in the wallpaper of the present invention vary significantly depending on the composition and ratio of the resins contained therein. Therefore, it is not possible to identify the adhesive used in the wallpaper of the present invention based on the composition and ratio of the resins contained therein. Therefore, the inventors of the present invention conducted repeated trial and error to identify the characteristics necessary to identify the adhesive of the present invention, and as a result, found that the characteristic that can be appropriately identified is open time.

[0011] According to the first aspect, by heating the adhesive layer, the wallpaper can be easily attached to a wall surface, and any misalignment can be easily corrected before the adhesive layer hardens.In addition, by heating the adhesive layer, wallpaper can be provided that can be easily peeled off from a wall surface.

[0012] A second aspect of the present invention is the wallpaper according to the first aspect, characterized in that the open time is in the range of 300 seconds to 1500 seconds.

[0013] According to the second aspect, it is possible to provide wallpaper that allows misalignment to be more easily corrected by heating the adhesive layer before the adhesive layer hardens.

[0014] A third aspect of the present invention is the wallpaper according to the first aspect, characterized in that the open time is in the range of 450 seconds to 1000 seconds.

[0015] According to the third aspect, it is possible to provide wallpaper that allows misalignment to be corrected more easily by heating the adhesive layer before the adhesive layer hardens.

[0016] A fourth aspect of the present invention is the wallpaper according to the first aspect, characterized in that the softening point of the adhesive is in the range of 65°C to 90°C.

[0017] According to the fourth aspect, it is possible to provide wallpaper that can be more easily attached to a wall surface and can also be more easily peeled off from the wall surface.

[0018] In a fifth aspect of the present invention, there is provided the wallpaper according to the first aspect, wherein the viscosity of the adhesive is in the range of 300 mPa·s to 3500 mPa·s at 180°C and in the range of 500 mPa·s to 7000 mPa·s at 160°C.

[0019] According to the fifth aspect, it is possible to provide wallpaper that can be more easily attached to a wall surface and that can more easily correct any misalignment before the adhesive layer hardens.

[0020] A sixth aspect of the present invention is an adhesive comprising a polypropylene copolymer resin as a main component, and an elastomer resin contained in the adhesive having a density of 0.85 g / cm 3 ~0.90g / cm 3 The wallpaper according to any one of the first to fifth aspects is characterized in that the thickness of the wallpaper is in the range of 100 μm to 150 μm.

[0021] According to the sixth aspect, it is possible to provide wallpaper that can be more easily applied to a wall surface and that allows for easier correction of misalignment before the adhesive layer hardens.

[0022] In a seventh aspect of the present invention, the weight of the adhesive contained in the adhesive layer is 30 g / m 2 ~100g / m 2 The wallpaper according to the first aspect is characterized in that the thickness is in the range of

[0023] According to the seventh aspect, the adhesive strength after application is sufficient and the adhesive will not peel off over time.

[0024] An eighth aspect of the present invention is the wallpaper according to the first aspect, wherein the wallpaper body has a rectangular shape and is rolled up so that one surface of the wallpaper body is disposed on the front side.

[0025] According to the eighth aspect, it is possible to provide wallpaper that is easy to transport and handle. A ninth aspect of the present invention is a wallpaper application method for applying the wallpaper according to the first aspect to a wall surface, the method comprising: an application heating step for heating the adhesive layer; an application step for applying the wallpaper to a desired position on the wall surface after the application heating step; and a cooling step for leaving the wallpaper fixed to the wall surface for a predetermined period of time.

[0026] According to the ninth aspect, by heating the adhesive layer, the wallpaper can be easily attached to the wall surface, and any misalignment of the wallpaper can be easily corrected before the adhesive layer hardens.

[0027] A tenth aspect of the present invention is a wallpaper peeling method for peeling the wallpaper described in claim 1 from a wall surface, comprising a peeling heating step of heating the adhesive layer from one side of the wallpaper body, and a peeling step of peeling the wallpaper from the wall surface after the peeling heating step.

[0028] According to the tenth aspect, the wallpaper can be easily peeled off from the wall surface by heating the adhesive layer. [Brief explanation of the drawings]

[0029] [Figure 1] FIG. 1 is a schematic side view of wallpaper according to the first embodiment. [Figure 2] FIG. 2 is a table showing the compositions of adhesive examples and comparative examples. [Figure 3] FIG. 3 is a table showing the experimental results of examples and comparative examples of adhesives. [Figure 4]FIG. 4 is a schematic side view of the wallpaper according to the first embodiment during transportation. [Figure 5] FIG. 5 is a schematic side view of the wallpaper according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0030] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the wallpaper according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the following embodiment.

[0031] (Embodiment 1) 1 is a schematic side view of the wallpaper according to the present embodiment. As shown in this figure, no surface layer is provided on one surface 10a of the wallpaper body 10, and an adhesive layer 20 is provided on the other surface 10b.

[0032] First, the wallpaper body 10 will be described. The wallpaper body 10 has a rectangular shape when viewed from the front. The substrate of the wallpaper body 10 is not particularly limited as long as it is paper or nonwoven fabric. As the paper, wallpaper base paper, wallpaper lining paper, etc. are preferred, and as the nonwoven fabric, polyester-blended paper is preferred.

[0033] The thickness of the wallpaper body 10 is not particularly limited, but is preferably 0.1 mm to 0.5 mm, and particularly preferably 0.2 mm to 0.4 mm. Within this range, the surface will not become uneven even if the wall has minute irregularities, and the wallpaper will not bend when rolled up.

[0034] Next, the adhesive layer 20 will be described. The adhesive layer 20 is not particularly limited as long as it contains an adhesive with an open time in the range of 60 seconds to 1500 seconds. Specifically, the adhesive layer 20 may be formed by impregnating the other side 10b of the wallpaper main body 10 with the adhesive, or by applying the adhesive to the surface of the other side 10b of the wallpaper main body 10, or by forming the other side 10b of the wallpaper main body 10 with part of the adhesive impregnated and the other part of the adhesive applied to the surface of the other side 10b of the wallpaper main body 10.

[0035] The adhesive contained in adhesive layer 20 is not limited as long as the open time is in the range of 60 s to 1500 s, but an open time in the range of 300 s to 1500 s is preferred, and an open time in the range of 450 s to 1000 s is particularly preferred.

[0036] If the open time is shorter than 60 seconds, the adhesive will harden easily, making it difficult to correct misalignment and reducing the ease of application to the wall.On the other hand, if the open time is longer than 1500 seconds, the adhesive will be difficult to harden, and even if the wallpaper is applied in the intended position, the wallpaper's own weight may cause it to shift out of position depending on the application location.

[0037] The softening point of the adhesive is preferably in the range of 65°C to 90°C, more preferably in the range of 70°C to 84°C, and particularly preferably in the range of 74°C to 82°C. When the softening point of the adhesive is within this range, misalignment can be easily corrected. Here, "softening point" refers to the temperature at which softening and deformation occur when heated. If the softening point is lower than 65°C, the adhesive is difficult to solidify, and even if it is applied to the intended position, the wallpaper's own weight may cause it to shift out of position depending on the application location. Furthermore, if the softening point is lower than 65°C, the adhesive is likely to soften when stored at room temperature (20°C to 30°C). On the other hand, if the softening point is higher than 90°C, the adhesive is likely to solidify, making it difficult to correct misalignment and reducing the ease of application to wall surfaces. The softening point can be measured according to JIS K6863:1994, "Test method for softening point of hot melt adhesives."

[0038] Furthermore, the adhesive preferably has a viscosity in the range of 300 mPa·s to 3500 mPa·s at 180°C and 500 mPa·s to 7000 mPa·s at 160°C, more preferably 1000 mPa·s to 2500 mPa·s at 180°C and 2000 mPa·s to 3500 mPa·s at 160°C, and particularly preferably 1200 mPa·s to 2000 mPa·s at 180°C and 2300 mPa·s to 3500 mPa·s at 160°C. When the adhesive viscosity is in this range, wallpaper can be easily attached to the wall surface. Adhesives with viscosities outside the range of 300 mPa·s to 3500 mPa·s at 180°C and outside the range of 500 mPa·s to 7000 mPa·s at 160°C change viscosity with temperature, making it difficult to correct misalignment and reducing workability. Viscosity can be measured in accordance with JIS K 6862 (Method A). Specifically, 300 g of adhesive pre-melted at 190°C in a heating bath is placed in a test container and heated in the atmosphere while thoroughly stirring with a rod thermometer. Once the adhesive temperature reaches 180°C or 160°C, the viscosity is measured using a B-type viscometer (Tokimec Viscometer Model: BM, manufactured by Tokimec Sangyo Co., Ltd.). A rotor appropriate for the adhesive can be used.

[0039] The composition and ratio of the elastomer resin contained in the adhesive are not particularly limited as long as the open time of the adhesive is in the range of 60 to 1500 seconds. Examples of elastomer resins include polypropylene copolymer resin (PPCO resin), ethylene-unsaturated ester copolymer resin, polyolefin, polyamide, polyurethane, etc. Among these elastomer resins, polypropylene copolymer resin is included as the main component, and the density of the polypropylene copolymer resin is 0.85 g / cm. 3 ~0.90g / cm 3Preferably, the softening point of the polypropylene copolymer resin is in the range of 65° C. to 90° C. Furthermore, it is more preferable that the softening point of the polypropylene copolymer resin is in the range of 65° C. to 90° C. By using such a polypropylene copolymer resin, it is possible to achieve both a long open time and sufficient adhesive strength.

[0040] Furthermore, the adhesive may contain, in addition to the above-mentioned elastomer resin, a tackifier, oil, etc. Examples of tackifiers include aliphatic hydrocarbon resins, alicyclic hydrocarbon resins, aromatic hydrocarbon resins, polyterpene resins, rosin resins, styrene resins, and coumarone-indene resins. Examples of oils include paraffinic process oils such as paraffin oil, naphthenic process oils, and aromatic process oils. Of these, paraffinic process oils and naphthenic process oils are preferred from the viewpoint of compatibility with the above-mentioned resins.

[0041] The content of elastomer resin in 100% by mass of adhesive is preferably 30% by mass to 90% by mass, more preferably 40% by mass to 80% by mass. The content of tackifier is preferably 10% by mass to 70% by mass, more preferably 20% by mass to 60% by mass. Furthermore, the content of oil is preferably 5% by mass to 15% by mass. An adhesive that satisfies these conditions has optimal ranges for softening point, viscosity, and open time, and is an adhesive with optimal ease of position adjustment.

[0042] The weight of the adhesive contained in the adhesive layer is not particularly limited, but is preferably 30 g / m 2 ~100g / m 2 The range of 40 g / m 2 ~70g / m 2 The adhesive weight is more preferably in the range of 30 g / m 2 If the adhesive weight is less than 100 g / m, the wallpaper 10 may not have sufficient adhesive strength. 2 If it is larger, the adhesive layer 20 is more likely to crack.

[0043] <How to apply wallpaper to a wall> Next, a method for attaching wallpaper 10 to a wall surface will be described. First, a heater is used to heat adhesive layer 20 to 120°C to 180°C (heating step for attachment) to soften the adhesive contained in adhesive layer 20. The heater is not particularly limited as long as it can heat adhesive layer 20, and examples include a hair dryer and an iron. Here, heating of adhesive layer 20 may be performed from one surface 10a of wall main body 10 or from the other surface 10b of wall main body 10.

[0044] Next, the wallpaper 10 is attached to the desired position on the wall (attaching step). If the wallpaper 10 is not attached to the desired position on the wall, the adhesive has sufficient open time and adhesive strength, so the wallpaper 10 can be easily moved relative to the wall. As a result, the misalignment can be easily corrected.

[0045] Thereafter, the wallpaper 10 is left to stand for a predetermined time (10 to 30 minutes) while being fixed to the wall surface (cooling step).

[0046] In this way, the wallpaper 10 can be attached accurately to the desired position on the wall surface.

[0047] <How to remove wallpaper from a wall> Next, a method for peeling wallpaper from a wall surface will be described. First, a heater is used to heat the adhesive layer 20 from one surface 10a of the wall surface main body 10 of the wallpaper 1 pasted on the wall surface (peeling heating step), thereby softening the adhesive contained in the adhesive layer 20. There are no particular limitations on the heater, and the same heater as that used in the pasting heating step can be used.

[0048] Next, the wallpaper 1 is peeled off from the wall surface (peeling step). Note that there are no particular limitations on the method for peeling off the wallpaper 1 from the wall surface, and for example, hands or general tools can be used.

[0049] By constructing wallpaper 1 as described above, it can be easily attached to a wall surface by heating adhesive layer 20, and any misalignment can be easily corrected before adhesive layer 20 hardens.In addition, it can be easily peeled off from the wall surface by heating adhesive layer 20.

[0050] <Adhesive Examples and Comparative Examples> Adhesive Examples 1 to 12 and Comparative Examples 1 and 2 shown in Figure 2 were produced using a general manufacturing method. Here, in the composition column, PP / PE indicates a copolymer resin of polypropylene and polyethylene, and PP / PB indicates a copolymer resin of polypropylene and polybutene. Furthermore, hydrocarbon resin 1 and hydrocarbon resin 2 indicate different hydrocarbon resins.

[0051] The results of experiments on the softening points of these adhesives, their viscosities at 180°C and 160°C, their open time evaluation, and their ease of position adjustment are shown in Figure 3. Here, in the open time evaluation, adhesives with open times of 300 to 1500 seconds (s) are indicated by "○", those with open times of 60 to less than 300 seconds (s) are indicated by "△", those with open times of less than 60 seconds (s) are indicated by "×", and those with open times of more than 1500 seconds (s) are indicated by "-" because they are not applicable.

[0052] In addition, in the evaluation of ease of position adjustment, very easy to move is indicated by "◎", easy to move is indicated by "○", slightly movable is indicated by "△", and immovable is indicated by "×". Here, ease of position adjustment was evaluated as follows. First, the adhesive was applied at 100 g / m 2 Wallpaper (Remiria (product number LE3-5), manufactured by Nagai Co., Ltd.) coated with the adhesive at a thickness of 1000 μm was cut into 25 mm x 80 mm pieces to prepare samples. The samples were then placed on gypsum board (Yoshino Gypsum Co., Ltd.'s "Tiger Board" (registered trademark) JIS A 6901 Gypsum Board GB-R), heat-sealed at 0.1 MPa and 160°C for 1 second, and left at room temperature (25°C) for 30 seconds. The wallpaper was then manually shifted in the shear direction to evaluate ease of shifting.

[0053] As can be seen from these figures, it was found that position adjustment was easy (wallpaper was easy to move) for Examples 1 to 12. In particular, it was found that position adjustment was extremely easy (wallpaper was extremely easy to move) for Example 5.

[0054] On the other hand, it was found that the open time of Comparative Example 1 was less than 60 seconds, making it difficult to adjust the position. Also, the open time of Comparative Example 2 exceeded 1500 seconds, making it easy to adjust the position, but depending on the application location, the weight of the wallpaper could cause the application position to shift.

[0055] <Wallpaper shape during transportation> The wallpaper 1 according to this embodiment may be rolled up so that one surface 10a of the wallpaper body 10 is disposed on the front side, as shown in FIG.

[0056] By making the wallpaper 1 in this state, it can be made compact, making it easier to transport. Also, since one surface 10a of the wallpaper body 10 is arranged on the front side, it can be prevented from adhering to other objects. Furthermore, the adhesive layer 20 provided on the other surface 10b of the wallpaper body 10 will not adhere to the one surface 10a of the wallpaper body 10 unless heated, so it can be easily returned to its original plate shape (rectangular shape). As a result, the workability of the pasting work is improved.

[0057] (Embodiment 2) In the first embodiment, no surface layer is provided on one side of the wallpaper body, but a surface layer may be provided as shown in Fig. 5. Fig. 5 is a schematic side view of wallpaper 1A according to this embodiment.

[0058] There is no particular limitation on the surface layer 30. Examples of the surface layer 30 include gypsum board, concrete, wooden substrates such as plywood, stone substrates such as tiles, vinyl chloride, and olefin.

[0059] In the above-described embodiment, the surface (one side and the other side) of the wallpaper body is not embossed, but it may be embossed by the same method as that used to emboss conventional wallpaper. [Explanation of symbols]

[0060] 1, 1A wallpaper 10 Wallpaper itself 10a One side of the wallpaper 10b Other side of wallpaper body 20 Adhesive layer 30 Surface layer

Claims

1. A wallpaper body having a base material of paper or nonwoven fabric (a wallpaper body having a surface layer mainly composed of plastic (including polyvinyl chloride resin) on one side of the wallpaper body and a thickness of 20 g / m ２ (excluding wallpaper with a surface layer made of the above plastics (including polyvinyl chloride resin)) and An adhesive layer provided on the other surface of the wallpaper body; The wallpaper is attached to a wall surface or peeled off from the wall surface after the adhesive layer is heated, The open time of the adhesive contained in the adhesive layer is in the range of 60 s to 1500 s.

2. 2. The wallpaper according to claim 1, wherein the open time is in the range of 300 s to 1500 s.

3. 2. The wallpaper according to claim 1, wherein the open time is in the range of 450 s to 1000 s.

4. 2. The wallpaper according to claim 1, wherein the softening point of the adhesive is in the range of 65°C to 90°C.

5. 2. Wallpaper according to claim 1, characterized in that the adhesive has a viscosity in the range of 300 mPa·s to 3500 mPa·s at 180°C and in the range of 500 mPa·s to 7000 mPa·s at 160°C.

6. The adhesive contains a polypropylene copolymer resin as a main component, The density of the elastomer resin contained in the adhesive is 0.85 g / cm ３ ~0.90g / cm ３ in the range Wallpaper according to any one of claims 1 to 5.

7. The weight of the adhesive contained in the adhesive layer is 30 g / m ２ ~100g / m ２ 7. The wallpaper according to claim 6, wherein the thickness of the wallpaper is in the range of 0.1 to 1.0 mm.

8. The wallpaper body has a rectangular shape, 2. The wallpaper according to claim 1, wherein the wallpaper body is rolled up so that one surface of the wallpaper body is disposed on the front side.

9. A method for attaching the wallpaper according to claim 1 to a wall surface, comprising the steps of: a bonding heating step of heating the adhesive layer; a sticking step of sticking the wallpaper to a target position on the wall surface after the sticking heating step; a cooling step of leaving the wallpaper fixed to the wall surface for a predetermined period of time; A method for attaching wallpaper having the above structure.

10. A method for removing the wallpaper according to claim 1 from a wall surface, comprising the steps of: A peeling and heating process of heating the adhesive layer from one side of the wallpaper body; a peeling step of peeling the wallpaper from the wall surface after the peeling heating step; A method for removing wallpaper comprising the steps of:

Images