JP6657762B2 - wallpaper - Google Patents

Description

  The present invention relates to wallpaper having the required surface strength.

In order to improve the concealing property of concealing dents, gaps, steps, and the like existing on the wall surface of the base, the wallpaper may require a sense of volume.
Here, in the wall covering composed of the backing paper for wallpaper and the resin layer, the volume feeling is increased by thickening the resin layer or foaming the resin and increasing the expansion ratio as in the wallpaper of Patent Document 1. Can be raised.
However, when the resin layer is thick, the surface strength cannot be maintained, and the surface strength is reduced. Further, there has been a problem that the unevenness of the surface due to embossing does not provide sharp reproducibility.

JP 2008-38265 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a wall covering material having a sufficient volume feeling and a high surface strength to obtain non-landing concealing properties in wallpaper comprising a backing paper and a resin layer.

In order to solve the problem, wallpaper which is one embodiment of the present invention has a foamed resin layer formed on a backing paper, and the backing paper has a basis weight of 50 g / m ² or more and 100 g / m ² or less and a thickness of 100 g / m ² or less. 80 μm or more and 150 μm or less, the resin layer contains a vinyl chloride resin as a resin, and has a basis weight of 50 g / m ² or more and 280 g / m ² or less and an expansion ratio of 3 times or more. Is a polymerization degree of 1000 or more.

  ADVANTAGE OF THE INVENTION According to the wallpaper which is an aspect of the present invention, it is possible to provide a wallpaper having a sufficient volume feeling for obtaining the non-landing concealment property and having improved surface strength.

It is a typical sectional view for explaining wallpaper concerning an embodiment based on the present invention.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the wallpaper of the present embodiment has a resin layer 2 formed on one surface of a backing paper 1, and a printed layer 3 and a coat layer 4 formed on the resin layer 2. I have. The surface of the wallpaper is provided with an uneven pattern 5 by processing such as embossing. Here, as the wallpaper of the present embodiment, the print layer 3, the coat layer 4, and the uneven pattern 5 may be omitted.

<Backing paper 1>
The backing paper 1 is made of a fibrous sheet such as paper. Examples of the fibrous sheet include plain paper, flame-retardant paper (a pulp-based sheet treated with a flame retardant such as guanidine sulfamate and guanidine phosphate), and inorganic additives such as aluminum hydroxide and magnesium hydroxide. Inorganic paper, high-quality paper, thin paper, and the like. In the present embodiment, paper containing little or no inorganic additive, for example, plain paper is used.
However, as the backing paper 1, a paper having a basis weight of 50 to 100 g / m ² and a thickness of 80 to 150 μm is employed. This makes it possible to secure the rigidity required for the wall covering material.

<Resin layer 2>
The resin layer 2 is a foamed resin layer made of, for example, a vinyl chloride resin.
The polymerization degree of this vinyl chloride resin is 1000 or more. By setting the degree of polymerization to 1,000 or more, the surface strength of the wallpaper can be increased.
The resin layer 2 is mixed with a foaming agent and foamed by a heat treatment. The expansion ratio is 3 times or more and 6 times or less.
As the foaming agent, ADCA (azodicarbonamide foaming agent) and OBSH (oxybissulfonylhydrazide foaming agent) are preferably used. For example, in order to secure the expansion ratio and prevent the roughening of the foaming surface, the above two kinds of blowing agents ADCA and OBSH are mixed in a ratio of 3: 1 to 1: 1 with respect to 100 parts of the vinyl chloride resin. And mix to make 1 to 4 parts.
As the foam stabilizer, two kinds of stabilizers (barium salt-based and zinc salt-based) are added at a ratio of 1: 4 to 4: 1 in order to impart thermal stability and increase the foam thickness. It can be mixed so as to become 1 to 4 parts with respect to 100 parts of the vinyl chloride resin.

When the resin layer 2 has a basis weight of 50 to 280 g / m ² and a foaming ratio of 3 times or more, the resin layer 2 has a sufficient volume feeling for obtaining non-landing concealing properties, has excellent surface strength, and has an embossed surface. The surface uneven pattern 5 can also be reproduced sharply.
In the resin layer 2, a plasticizer, a viscosity reducing agent, other organic additives, and inorganic powder may be appropriately mixed according to the intended use.
The inorganic powder includes calcium carbonate, aluminum hydroxide, magnesium hydroxide, silica sand, talc, silicas, magnesium silicate, zinc borate, titanium dioxide and the like. It is preferable to add 40 to 150 parts of the inorganic powder to 100 parts of the vinyl chloride resin constituting the resin layer 2. Here, when the amount of the inorganic powder exceeds 150 parts, the non-combustibility is increased, but the volume feeling may be reduced.

<Printing layer 3>
The printing layer 3 is provided on the resin layer 2 in a sheet shape or a picture pattern shape by a calender molding method, a coating method, a screen printing method, or the like.
The printing layer 3 is formed using a printing ink (non-foamable ink) and / or a foamable ink mainly containing an aqueous emulsion resin, a foamable ink mainly containing a vinyl chloride paste resin, or the like.
<Coat layer 4>
The coat layer 4 is a layer that protects the surface of the wallpaper.
<Uneven pattern 5>
The concavo-convex pattern 5 may be partially foamed with a foam-suppressing ink or chemically embossed by partially heating and foaming with hot air or infrared rays. This is preferable since sharp unevenness can be obtained.

<Action and others>
According to the wallpaper of the present embodiment, it is possible to provide a wallpaper having a sufficient volume feeling and excellent surface strength for obtaining the non-landing concealment property.
This wallpaper can sharply reproduce the uneven shape even when the uneven pattern 5 is provided by embossing or the like.
Here, by adding the inorganic powder to the resin layer 2 in an amount of 40 parts or more, the foaming gas can be appropriately released, and the shape of the void (cell) formed by the foaming can be made appropriate.
However, if the amount of the inorganic powder exceeds 150 parts, the volume is reduced, so the upper limit is 150 parts.

Next, examples of the present invention will be described.
<Example 1>
Plain paper having a basis weight of 65 g / m ^{2 and a} thickness of 110 μm (Nippon Paper Industries Co., Ltd .: “NI65AT”) was used as the backing paper 1 for wallpaper.
On top of the wallpaper backing sheet 1, a vinyl chloride resin (manufactured by Tosoh Corporation: "SP-039", polymerization degree 1050) a basis weight 270 g / ^{m 2} a paste by adding 100 parts of inorganic powder The resin layer 2 was formed by applying a coating method as described above, foamed by heating (foaming ratio: 3 times), cooled and dried to obtain the wallpaper of Example 1. The resin layer 2 was mixed with a foaming agent, and the foaming agent was foamed by heat treatment. ADCA (azodicarbonamide foaming agent) and OBSH (oxybisbenzenesulfonylhydrazide foaming agent) were used as foaming agents.

<Example 2>
Plain paper having a basis weight of 65 g / m ^{2 and a} thickness of 110 μm (Nippon Paper Industries Co., Ltd .: “NI65AT”) was used as the backing paper 1 for wallpaper.
On top of the wallpaper backing sheet 1, a vinyl chloride resin (manufactured by Tosoh Corporation: "SP-039", polymerization degree 1050) a basis weight 280 g / ^{m 2} a paste by adding 100 parts of inorganic powder The resin layer 2 is formed by applying a coating method as described above, and a pattern is printed on the resin layer 2 by gravure printing using an aqueous ink. Embossing was performed, followed by cooling and drying to obtain wallpaper of Example 2. The resin layer 2 was mixed with a foaming agent, and the foaming agent was foamed by heat treatment. ADCA (azodicarbonamide foaming agent) and OBSH (oxybisbenzenesulfonylhydrazide foaming agent) were used as foaming agents.

<Comparative Example 1>
Plain paper having a basis weight of 65 g / m ^{2 and a} thickness of 110 μm (Nippon Paper Industries Co., Ltd .: “NI65AT”) was used as the backing paper 1 for wallpaper.
A paste obtained by adding 120 parts of an inorganic powder to a vinyl chloride resin (manufactured by Tosoh Corporation: “T-70A”, degree of polymerization: 700) on the backing paper 1 for wallpaper has a basis weight of 235 g / m ^2. The resin layer 2 is formed by applying a coating method as described above, and a pattern is printed on the resin layer 2 by gravure printing using an aqueous ink. Embossing was performed, followed by cooling and drying to obtain a wallpaper of Comparative Example 1. The resin layer 2 was mixed with a foaming agent, and the foaming agent was foamed by heat treatment. ADCA (azodicarbonamide foaming agent) and OBSH (oxybisbenzenesulfonylhydrazide foaming agent) were used as foaming agents.

<Comparative Example 2>
A wallpaper of Comparative Example 2 was obtained in the same manner as in Comparative Example 1 except that the number of parts of the inorganic powder was changed to 170 parts.
<Evaluation method>
The feeling of volume was measured by measuring the thickness using a dial thickness gauge and evaluating whether the thickness exceeded 0.4 mm.
The non-landing concealment property is to determine whether or not the location can be visually identified by illuminating one side with a circular seal with a thickness of 110 µm and a diameter of 20 mm on a gypsum board (thickness of 9.5 mm) of quasi-nonflammable standard. evaluated.
The surface strength was determined by visually inspecting the state of surface damage at the time of scratching, and evaluating whether or not the base paper layer was exposed, by a test in accordance with the standard “Surface Reinforced Wallpaper Performance Rules” established by the Wallpaper Industry Association.
<Evaluation results>
Table 1 shows the evaluation results.

As can be seen from Table 1, it was confirmed that the wallpapers of Examples 1 and 2 based on the present invention had good voluminous feel, non-landing concealability, and surface strength.
Here, in Example 1, the wallpaper prepared by adjusting the basis weight of the backing paper 1 to 50 g / m ² or 100 g / m ² and adjusting the basis weight of the entire wallpaper to 270 g / m ² was also evaluated. However, it has been confirmed that the same effect as in the first embodiment is obtained.
On the other hand, the wallpaper of Comparative Example 1 has a low surface strength because the degree of polymerization of the resin in the resin layer is less than 1,000.
Further, in the wallpaper of Comparative Example 2, the volume of the inorganic powder was reduced since the amount of the inorganic powder was increased as compared with Comparative Example 1.

1 backing paper 2 resin layer 3 print layer 4 coat layer 5 uneven pattern

Claims (6)

A foamed resin layer is formed on the backing paper,
The backing paper has a basis weight of 50 g / m ² or more and 100 g / m ² or less, and a thickness of 80 μm or more and 150 μm or less,
The resin layer contains a vinyl chloride resin as a resin, and has a foaming ratio of 50 g / m ² or more and 280 g / m ² or less and 3 times or more and 6 times or less ,
The degree of polymerization of the vinyl chloride resin is Ri der 1000 or 1050 or less,
The resin layer contains a foam stabilizer,
The foam stabilizer includes two types of a barium salt-based stabilizer and a zinc salt-based stabilizer,
The mass ratio of the content of the barium salt stabilizer, the content of the zinc salt-based stabilizers, 1: 4 to 4: wallpaper, characterized in der Rukoto 1 range. Wallpaper foaming agent for foaming, according to claim 1, characterized in that it consists of azodicarbonamide blowing agent and oxybis benzene sulfonyl hydrazide blowing agent. The total amount of the azodicarbonamide blowing agent content and the oxybisbenzenesulfonylhydrazide blowing agent content is in the range of 1 part by mass or more and 4 parts by mass or less based on 100 parts by mass of the vinyl chloride resin. The wallpaper according to claim 2, characterized in that: The mass ratio between the content of the azodicarbonamide blowing agent and the content of the oxybisbenzenesulfonylhydrazide blowing agent is in the range of 3: 1 to 1: 1. Wallpaper described in 3. The wallpaper according to any one of claims 1 to 4, further comprising a printing layer formed on the resin layer using a foamable ink containing a vinyl chloride paste resin as a main component. . The resin layer contains an inorganic powder,
The amount of the inorganic powder added to the resin layer is 40 parts or more and 150 parts or less based on 100 parts of the vinyl chloride-based resin, according to any one of claims 1 to 5 , wherein The described wallpaper.

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