JP2000291224A - Wall body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wall paper from being broken even in the case when a crack occurs on a base material made of concrete or the like by sticking a flexible foam sheet on the surface of a wall base material, and sticking the wall paper on the flexible foam sheet. SOLUTION: A soft foam sheet 2 comprising a closed cell electron beam bridged polyethylene foam sheet is stuck on one face of a concrete base material 1 by using a vinyl acetate-based emulsion adhesive. Wall paper 3 formed of a flexible polyvinyl chloride sheet is stuck on the surface of the sheet 2 by using the vinyl acetate-based emulsion adhesive to form a wall body. The flexible foam sheet 2 has preferably tensile strength of 10 kg/cm2 or larger, and elongation ratio of 120% or larger, an olefin-based resin foam sheet excellent in again resistance is suitable, and the thickness is preferably 0.5-15 mm. In addition, the expansion ratio of the flexible foam sheet 2 is preferably 3-40 times. In addition, for instance, a thermoplastic resin sheet can be mentioned as the wall paper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a wall.

[0002]

2. Description of the Related Art Conventionally, a concrete structure of reinforced concrete (RC) constructed by casting concrete in a formwork having reinforcing bars reinforced in place is made of concrete due to internal strain generated by solar heat unless the roof is insulated. There has been a problem that cracks occur in the wall base material, and the wallpaper stuck on the surface of the wall base material is broken.

In order to prevent the wallpaper from being broken due to internal distortion, for example, Japanese Patent Application Laid-Open Nos. 10-88767 and
As disclosed in Japanese Patent Application Publication No. 0-227117, for example, a wallpaper is pasted on a surface of a wall base made of concrete after being boarded.

[0004]

However, such a wall requires extra materials and man-hours, and there is a problem that the indoor space is narrowed.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a wall body which can prevent the occurrence of cracks in the wallpaper even if cracks occur in the wall base material made of concrete or the like. .

[0006]

The wall body of the present invention is characterized in that a flexible foam sheet is adhered to the surface of a wall base material, and wallpaper is adhered on the flexible foam sheet.

As the wall substrate used in the present invention, any conventionally known wall substrate can be used, and a concrete substrate, gypsum board or the like is usually used.

The flexible foamed sheet used in the present invention preferably has a tensile strength of at least 10 kg / cm ² and an elongation of at least 120%, and is a closed-cell, electron-beam crosslinked polyethylene foamed sheet having excellent aging resistance. Olefin-based resin foam sheets are suitably used.

The thickness of the flexible foam sheet is not particularly limited, but is preferably 0.5 to 15 mm. 0.5mm
If it is less than 15 mm, the amount of deformation of the wall base material cannot be sufficiently absorbed, and if it exceeds 15 mm, it becomes too flexible, giving a sense of incongruity at the time of contact and narrowing the indoor space. When the purpose is only to prevent the tearing of the wallpaper, the thickness is 0.5
The thickness is preferably 5 mm when heat insulation, soundproofing, etc. are required in addition to the prevention of torn wallpaper.
It is preferably between 15 and 15 mm.

[0010] The expansion ratio of the flexible foam sheet is not particularly limited, but is preferably 3 to 40 times. If the ratio is less than 3 times, the deformation amount of the wall base material cannot be sufficiently absorbed, and if it exceeds 40 times, it becomes too flexible and causes an uncomfortable feeling upon contact. In addition, when the purpose is only to prevent the tearing of the wallpaper, the foaming ratio is preferably 3 to 30 times. In addition to the prevention of the tearing of the wallpaper, when heat insulation, soundproofing, and the like are required, The expansion ratio is preferably 20 to 40 times.

When fire resistance is required for the flexible foam sheet, it is preferable to mix 2 to 50 parts by weight of a flame retardant with respect to 100 parts by weight of the resin component of the flexible foam sheet.
Further, a non-combustible material such as a glass fiber or a semi-combustible material may be laminated.

The wallpaper used in the present invention is not particularly limited, and any conventionally known wallpaper can be used. For example, a thermoplastic resin sheet such as a soft polyvinyl chloride sheet that can be wiped with water can be used.

The adhesive for adhering the flexible foam sheet or wallpaper is not particularly limited, and any conventionally known adhesive can be used. For example, a starch paste, a vinyl acetate-based emulsion adhesive and the like can be mentioned. In order to improve the adhesion between the flexible foam sheet and the wall substrate or wallpaper, a nonwoven fabric or the like may be laminated on the surface of the flexible foam sheet.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing one example of the wall body of the present invention.

[Embodiment 1] In FIG. 1, 1 is a thickness of 5 m.
A flexible foam sheet 2 made of a closed-cell, electron-beam cross-linked polyethylene foam sheet having a foaming ratio of 10 times and a thickness of 1 mm on one side of a concrete base material having a length of 100 mm and a width of 25 mm and a width of 25 mm, a vinyl acetate emulsion adhesive ( Application amount 1
50 g / m ² ). In addition, the concrete substrate 1 is divided into two in order to perform a tensile test described later, and is composed of two concrete plates having a thickness of 5 mm, a length of 50 mm, and a width of 25 mm.

Next, on the surface of the flexible foam sheet 2, a thickness of 1
A wallpaper 3 made of a soft polyvinyl chloride sheet having a thickness of ² mm was adhered using a vinyl acetate emulsion adhesive (application amount 150 g / m ² ) to obtain a wall of the present invention.

Example 2 A nonwoven fabric made of polyethylene terephthalate (PET) having a basis weight of 30 g / m ² was adhered to both sides of a closed-cell, electron-beam-crosslinked polyethylene foam sheet having an expansion ratio of 10 and a thickness of 1 mm as a flexible foam sheet. A wall of the present invention was obtained in the same manner as in Example 1 except that the laminated body used was used.

Example 3 A wall body of the present invention was prepared in the same manner as in Example 1 except that a closed-cell, electron-beam-crosslinked polyethylene foam sheet having an expansion ratio of 20 and a thickness of 2 mm was used as a flexible foam sheet. Obtained.

Comparative Example A wall was obtained in the same manner as in Example 1 except that wallpaper was directly adhered to one surface of a concrete base material without using a flexible foam sheet.

With respect to the walls obtained in Examples 1 to 3 and Comparative Example, the following tensile tests were carried out to evaluate the prevention of tearing of the wallpaper. [Tensile test method] Constituting the concrete substrate of the wall 2
One of the concrete plates is fixed, and the other one is pulled longitudinally at a speed of 5 mm / min with a universal tensile tester,
The distance between the two concrete plates when the wallpaper was broken was measured, and the results are summarized in Table 1.

[0021]

[Table 1]

As is clear from Table 1, it is understood that the walls of Examples 1 to 3 have a breaking distance exceeding 2 mm, which is generally called the maximum width of a crack in a concrete base material.

Since the wall of the present invention is constructed as described above, even if cracks occur in the wall base material, it is possible to prevent the wallpaper from being broken.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing one example of a wall body of the present invention.

[Explanation of symbols]

 1 Concrete substrate 2 Soft foam sheet 3 Wallpaper

Claims (1)

[Claims] 1. A wall comprising a flexible foam sheet adhered to a surface of a wall base material, and wallpaper adhered to the flexible foam sheet.