Method for peeling wallpaper

Abstract

To provide a method for easily removing backing paper remaining on a substrate, when peeling wallpaper.SOLUTION: Before old wallpaper stuck to a substrate is replaced, the old wallpaper is peeled. The wallpaper is formed by stacking and integrating a wallpaper body composed of a vinyl chloride resin and backing paper by an adhesive. When the old wallpaper is peeled, the backing paper of the old wallpaper remains on the substrate in many cases. Then, a peeling agent is coated onto the remaining backing paper. The peeling agent contains a surface active agent, a cellulose nanofiber and water. After the lapse of predetermined time after coating, the remaining backing paper is removed by fingers and a spatula. Then, a starch-based adhesive is coated onto the substrate or backing paper of new wallpaper, new wallpaper is stuck to the substrate, and the wallpaper is replaced.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a method for peeling old wallpaper adhered to a base for the purpose of replacing old wallpaper or the like, and particularly to a method for peeling wallpaper capable of satisfactorily removing the backing paper remaining on the base after peeling the old wallpaper.

Background Art

[0002] To replace wallpaper, first, the old wallpaper adhered to the base with an adhesive such as a starch-based adhesive or an adhesive must be peeled off. At this time, it is preferable to completely remove the old wallpaper. However, when the wallpaper consists of a wallpaper body and a backing paper, when peeling the old wallpaper from the surface, although the wallpaper body can be peeled off well, the backing paper of the old wallpaper often remains on the base.

[0003] To remove the remaining backing paper, various peeling agents have been proposed conventionally. For example, Patent Document 1 proposes a peeling agent containing a surfactant, a humectant, and water (Patent Document 1, Claim 1). However, when such a peeling agent is applied to the backing paper, the peeling agent may drip, making it difficult to remove the part of the backing paper that has not sufficiently absorbed the peeling agent. To prevent the dripping of the peeling agent, a means of containing a thickener in the peeling agent has also been proposed (Patent Document 1, Paragraph 0020). However, when the viscosity of the peeling agent increases, it becomes difficult for the peeling agent to penetrate into the backing paper, and it becomes difficult to soften or dissolve an adhesive or an adhesive such as a starch-based adhesive, making it difficult to satisfactorily remove the remaining backing paper.

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a method for peeling wallpaper that can easily remove the backing paper remaining on the base.

Means for Solving the Problems

[0006] The present invention solves the above problems by using a peeling agent that is difficult to drip and easily penetrates the backing paper. That is, the present invention provides a peeling step of peeling wallpaper, which is formed by laminating and integrating a wallpaper body and a backing paper, from the base, a coating step of applying a peeling agent containing a surfactant, cellulose nanofibers, and water to the backing paper remaining on the base after the peeling step, and a removing step of removing the remaining backing paper after the coating step.

[0007] The wallpaper to be peeled in the present invention is formed by laminating and integrating a wallpaper body and a backing paper. The wallpaper body is made of a conventionally known plastic sheet, plastic film, or plastic layer such as a vinyl chloride resin, or a conventionally known fabric such as a woven fabric or non-woven fabric. Various prints and embossings are often applied to the surface of the wallpaper body to impart design properties. A conventionally known material such as pulp paper is used for the backing paper. Also, the base to which the wallpaper is adhered is a conventionally known material such as a gypsum board. Note that the wallpaper is not limited to being adhered to the walls of a building and may also be adhered to other locations such as the ceiling.

[0008] The wallpaper is adhered by adhering the backing paper and the base with an adhesive such as a starch-based adhesive or an adhesive. When replacing this wallpaper, first, the wallpaper must be peeled from the base. To peel the wallpaper from the base, for example, a cut is made on the surface of the wallpaper with a cutter or the like, and the wallpaper body or the wallpaper body and the backing paper are grasped with fingers and peeled. At this time, since the adhesive force between the backing paper and the base is high, the wallpaper body can be peeled off, but the backing paper remains on the base.

[0009] Apply a peeling agent to the remaining backing paper. Any conventionally known application method can be adopted, such as brush coating or spray coating. The application amount of the peeling agent is also arbitrary, but generally about 100 - 200 g / m 2 is sufficient. The peeling agent contains a surfactant, cellulose nanofibers, and water. The surfactant is formulated to facilitate the penetration of water into the backing paper. Specifically, an anionic surfactant and / or a nonionic surfactant are used. Cellulose nanofibers are those obtained by refining cellulose fibers to a nanometer size and are used to thicken the peeling agent. Cellulose nanofibers thicken the peeling agent but are less likely to reduce the penetrability of the peeling agent into the backing paper. Conventionally known cellulose nanofibers are used. In particular, those in which -COONa groups are bonded to cellulose molecules in the cellulose nanofibers are preferably used.

[0010] The mass ratio of the surfactant incorporated in the peeling agent is preferably as follows. That is, with respect to 100 parts by mass of water, the surfactant is 0.01 - 0.5 parts by mass. When the blending ratio of the surfactant is less than 0.01 part by mass, the penetrability of the peeling agent into the backing paper tends to decrease. When the blending ratio of the surfactant exceeds 0.5 part by mass, the substrate tends to be easily damaged. Also, the mass ratio of the cellulose nanofibers incorporated in the peeling agent is preferably as follows. That is, with respect to 100 parts by mass of water, the cellulose nanofibers are 0.01 - 0.3 parts by mass. When the blending ratio of the cellulose nanofibers is less than 0.01 part by mass, the peeling agent tends to drip when applied. When the blending ratio of the cellulose nanofibers exceeds 0.3 part by mass, the penetrability of the peeling agent into the backing paper tends to decrease.

[0011] In addition to the surfactant, cellulose nanofibers, and water, other compounds may be added in small amounts to the stripping agent. For example, alkanol, water-soluble silicone oil, phenoxyethanol, sodium hydroxide, etc. may be added. Also, it is effective to add a preservative and a fungicide to prevent the aging deterioration of the stripping agent.

[0012] After applying the stripping agent to the remaining backing paper, the backing paper is removed after a predetermined time has elapsed. The predetermined time may be about 2 to 15 minutes. The stripping agent used in the present invention is less likely to drip and easily penetrates, and since water is retained by the cellulose nanofibers, this predetermined time can be extended. The removal method may be a conventionally known method. For example, the backing paper may be picked off with fingers and removed, or wiped off with a spatula. After removing the remaining backing paper, an adhesive such as a starch-based adhesive or an adhesive agent is applied to the base or the backing paper of the new wallpaper, and the new wallpaper is pasted onto the base to replace the wallpaper.

Advantages of the Invention

[0013] By adopting the wallpaper peeling method according to the present invention, the time allowance becomes longer, and the effect of being able to cleanly remove the backing paper remaining on the base can be achieved.

Examples

[0014] 〈Stripping Agent 1〉 Stripping Agent 1 having the following composition was prepared. Surfactant 0.5 parts by mass (“Texport SN-10” manufactured by Nippon Kayaku Co., Ltd.) Cellulose nanofibers 1 part by mass (“Reocrista 12-SX” manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) Water The balance The blending amounts of the surfactant (Texport SN-10 manufactured by Nippon Kayaku Co., Ltd.) and cellulose nanofiber (Reocrista 12-SX manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) are shown as they are in the product. Therefore, since the solid content concentration of Reocrista 12-SX manufactured by Daiichi Kogyo Seiyaku Co., Ltd. is 2% by mass, the blending amount of cellulose nanofiber alone is 0.02 parts by mass. Also, the surfactant (Texport SN-10 manufactured by Nippon Kayaku Co., Ltd.) contains a nonionic surfactant, an anionic surfactant, an alkanol, a silicone, and water.

[0015] <Peeling Agent 2> Peeling Agent 2 was prepared with the same composition as Peeling Agent 1, except that the blending amount of cellulose nanofiber (Reocrista 12-SX manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) was changed to 0.5 part by mass.

[0016] <Peeling Agent 3> Peeling Agent 2 was prepared with the same composition as Peeling Agent 1, except that the blending amount of cellulose nanofiber (Reocrista 12-SX manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) was changed to 5 parts by mass.

[0017] <Peeling Agent 4> Peeling Agent 2 was prepared with the same composition as Peeling Agent 1, except that the blending amount of cellulose nanofiber (Reocrista 12-SX manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) was changed to 15 parts by mass.

[0018] <Peeling Agent 5> Peeling Agent 5 having the following composition was prepared. Surfactant 0.5 part by mass (Texport SN-10 manufactured by Nippon Kayaku Co., Ltd.) Hydroxypropylmethylcellulose 0.02 part by mass (Marborose 90EMP15000 manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) Water The balance The blending amount of hydroxypropylmethylcellulose (Marborose 90EMP15000 manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) is shown as it is in the product.

[0019] <Release Agent 6> A release agent 6 was prepared with the same composition as the release agent 5, except that the blending amount of hydroxypropylmethylcellulose ("Marborose 90EMP15000" manufactured by Matsumoto Yushi Seiyaku Co., Ltd.) was changed to 0.1 part by mass.

[0020] <Release Agent 7> A release agent 7 was prepared with the same composition as the release agent 1, except that cellulose nanofibers ("Leocristal 12-SX" manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) were not blended.

[0021] <Release Agent 8> A release agent 8 consisting of 100 parts by mass of water was prepared.

[0022] Example 1 Sample 1 in which a vinyl chloride resin-based wallpaper ("RM-639" manufactured by L'oreal Co., Ltd.) was adhered to a gypsum board ("Tiger Board with a thickness of 9.5 mm" manufactured by Yoshino Gypsum Co., Ltd.) was prepared. The vinyl chloride resin-based wallpaper and the gypsum board are adhered with a starch-based adhesive ("Wallbond 100" manufactured by Wallbond Co., Ltd.). When the wallpaper was peeled off from this sample 1, the vinyl chloride resin could be peeled off well, but the backing paper remained on the gypsum board surface. <Release Agent 1> was applied to the remaining backing paper surface. The application was carried out with a brush and the application amount was 150 g / m 2 Then, immediately after the elapsed time shown in Table 1, the remaining backing paper was removed with fingers. Those in which the backing paper could be removed cleanly without being torn and there was almost no damage to the base were evaluated as "○", and those in which the backing paper was torn and could not be removed cleanly and damage to the base was observed were evaluated as "×", and the results are shown in Table 1.

[0023] Example 2 Except that <Release Agent 2> was used instead of <Release Agent 1>, the backing paper was removed in the same manner as in Example 1, the results were evaluated, and are shown in Table 1.

[0024] Example 3 Except for using <Release Agent 3> instead of <Release Agent 1>, the backing paper was removed and the results were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0025] Example 4 Except for using <Release Agent 4> instead of <Release Agent 1>, the backing paper was removed and the results were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0026] Comparative Example 1 Except for using <Release Agent 5> instead of <Release Agent 1>, the backing paper was removed and the results were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0027] Comparative Example 2 Except for using <Release Agent 6> instead of <Release Agent 1>, the backing paper was removed and the results were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0028] Comparative Example 3 Except for using <Release Agent 7> instead of <Release Agent 1>, the backing paper was removed and the results were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0029] Comparative Example 4 Except for using <Release Agent 8> instead of <Release Agent 1>, the backing paper was removed and the results were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0030] [Table 1] ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Example Comparative Example ─────────────────────────── Elapsed Time 1 2 3 4 1 2 3 4 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2 minutes ○ ○ ○ ○ ○ ○ ○ ○ 4 minutes ○ ○ ○ ○ ○ ○ ○ ○ 6 minutes ○ ○ ○ ○ ○ ○ ○ ○ 8 points ○ ○ ○ ○ ○ ○ ○ ○ 10 points ○ ○ ○ ○ ○ ○ ○ ○ 12 points ○ ○ ○ ○ × × × ○ 14 points ○ ○ ○ ○ × × × ○ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

[0031] Example 5 Except that sample 2, in which a synthetic resin embossed wallpaper ("EB-9801" manufactured by Sange Tsusho Co., Ltd.) was adhered to a gypsum board ("Tiger Board with a thickness of 9.5 mm" manufactured by Yoshino Gypsum Co., Ltd.) instead of the vinyl chloride resin-based wallpaper ("RM-639" manufactured by Leno Co., Ltd.), was used, the backsheet was removed and the results were evaluated in the same manner as in Example 1 and shown in Table 2.

[0032] Example 6 Except that <peeling agent 2> was used instead of <peeling agent 1>, the backsheet was removed and the results were evaluated in the same manner as in Example 5 and shown in Table 2.

[0033] Example 7 Except that <peeling agent 3> was used instead of <peeling agent 1>, the backsheet was removed and the results were evaluated in the same manner as in Example 5 and shown in Table 2.

[0034] Example 8 Except that <peeling agent 4> was used instead of <peeling agent 1>, the backsheet was removed and the results were evaluated in the same manner as in Example 5 and shown in Table 2.

[0035] Comparative Example 5 Except that <peeling agent 5> was used instead of <peeling agent 1>, the backsheet was removed and the results were evaluated in the same manner as in Example 5 and shown in Table 2.

[0036] Comparative Example 6 Except that <peeling agent 6> was used instead of <peeling agent 1>, the backsheet was removed and the results were evaluated in the same manner as in Example 5 and shown in Table 2.

[0037] Comparative Example 7 The backing paper was removed and the results were evaluated in the same manner as in Example 5, except that <Release Agent 7> was used instead of <Release Agent 1>, and the results are shown in Table 2.

[0038] Comparative Example 8 The backing paper was removed and the results were evaluated in the same manner as in Example 5, except that <Release Agent 8> was used instead of <Release Agent 1>, and the results are shown in Table 2.

[0039] [Table 2] ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Examples Comparative Examples ────────────────────────── Elapsed Time 5 6 7 8 5 6 7 8 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2 minutes ○ ○ ○ × ○ × ○ × 4 minutes ○ ○ ○ ○ ○ ○ ○ × 6 minutes ○ ○ ○ ○ ○ ○ ○ × 8 minutes ○ ○ ○ ○ ○ ○ × × 10 minutes ○ × ○ ○ ○ × × × 12 minutes × × ○ ○ × × × × 14 minutes × × ○ ○ × × × × ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

[0040] From the results of Table 1 and Table 2, it can be seen that the methods according to Examples 1 to 8 are effective methods that can cleanly remove the backing paper without damaging the base over a long period of time after the application of the release agent, as compared with the methods according to Comparative Examples 1 to 8. In particular, from the results of Table 2, it can be seen that when a synthetic resin embossed wallpaper is used as the wallpaper, it is more effective.

Claims

1. A peeling process of peeling off a wallpaper in which a wallpaper body and a backing paper are laminated and integrated and adhered to a base, from the base, After the peeling process, an application process of applying a peeling agent containing a surfactant, cellulose nanofibers and water to the backing paper remaining on the base and After the application process, a removal process of removing the remaining backing paper, a wallpaper peeling method comprising.

2. The wallpaper peeling method according to claim 1, wherein the base is a gypsum board.

3. The wallpaper peeling method according to claim 1, wherein the wallpaper body is a vinyl chloride resin.

4. The wallpaper peeling method according to claim 1, wherein the wallpaper is adhered to the base by a starch-based adhesive.

5. The wallpaper peeling method according to claim 1, wherein the composition of the peeling agent is 0.01 to 0.5 parts by mass of a surfactant and 0.01 to 0.3 parts by mass of cellulose nanofibers with respect to 100 parts by mass of water.

6. The wallpaper peeling method according to claim 1, wherein the surfactant is a nonionic surfactant and / or an anionic surfactant.

7. A peeling agent used when peeling off wallpaper, the peeling agent containing 0.01 to 0.5 parts by mass of a surfactant and 0.01 to 0.3 parts by mass of cellulose nanofibers with respect to 100 parts by mass of water.