JP2005206973A - Paper for wall paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide paper for wall paper developing no gaps at butt portion of wall papers or between wall paper and construction elements such as pillars or beams over a long period after application work onto walls, and excellent in unevenness hiding ability. <P>SOLUTION: The paper for wall paper is such that a facing paper 2 laminated on a backing paper 5 is mixed with 5-60 wt.% of synthetic fibers, being ≤1% in underwater elongation at beak and embossed. A midpaper may be laminated on the facing paper 2, and it is preferable that the facing paper or the resultant laminate of the facing paper and the midpaper be embossed prior to laminating on the backing paper and the thickness after embossed be 101-300% of that before embossed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  In the present invention, after affixing to a wall, over a long period of time, a gap (joint part) between wallpaper and a gap (opening or gap) between the wallpaper and a structure such as a column or a beam. In addition, the present invention relates to a paper wallpaper that is excellent in non-land concealing property (property that can satisfactorily conceal minute unevenness present on the wall surface).

Wallpapers are generally constructed by laminating a decorative layer made of synthetic resin or paper on a backing paper. Of these, those with a decorative layer made of paper are called paper wallpaper, and they are widely used with increasing natural orientation. It has come to come.
The paper wallpaper is configured by laminating one or more paper layers on a backing paper via an adhesive.
In addition, paper wallpaper in which synthetic fibers are blended (mixed) with paper laminated on backing paper has also been known for a long time (Japanese Patent Laid-Open Nos. 50-161548, 56-26098, 2000-96495). No. 2001, No. 2001-303491, No. 2002-54099, No. 2003-13397, etc.).

By the way, not only paper wallpaper made from 100% natural pulp, but also paper wallpaper blended with synthetic fibers as described above, the main material is paper, so it has the property of expanding and contracting by absorbing and releasing moisture. .
Due to this property, after the application to the wall surface, the opening of the adhesive between the paper wallpaper and the structure between the wallpaper and pillars, beams, etc. due to drying of the adhesive for construction or changes in indoor humidity. May occur.

In addition, the wall surface on which the various paper wallpapers as described above are not necessarily flat, and there are minute irregularities (such as places where the head of the nail that is struck can be seen, cuts, dents, and incompletely repaired places, etc.) There are a lot of land.
When a paper wallpaper such as that described above is applied to such a wall surface, irregularities different from the design may occur on the surface of the paper wallpaper, which may impair the appearance of the finished surface.

Furthermore, in order to improve the design of the paper wallpaper, the paper layer laminated on the backing paper may be embossed. However, since the paper is inherently low in formability, the paper layer has a complicated pattern. It is difficult to put embossing well according to the design drawing.
In addition, even if embossing is applied, the uneven pattern due to embossing may be deformed due to repeated absorption and release of moisture and moisture in the paper wallpaper. It may also be deformed or crushed by the roller hanging.
In addition, the aesthetic appearance of the finished surface due to the unevenness is further impaired by the deformation and crushing of these embossed designs.
JP-A-50-161548 JP-A-56-26098 JP 2000-96495 A JP 2001-303491 A JP 2002-54099 A JP 2003-13397 A

  In consideration of the above points, the present invention is a paper wallpaper with good embossing, which does not generate openings over a long period of time after being applied to a wall, and has excellent inland concealment. The object is to provide paper wallpaper.

  As a result of studies to solve the above-mentioned problems, the present inventors have made a decorative paper layer in which a mixed paper having specific characteristics is laminated on a backing paper among the above-mentioned conventional synthetic fiber mixed papers. As a result, it is possible to improve the shapeability and perform the embossing satisfactorily. The inventor has obtained knowledge that effects such as prevention of opening and improvement of unevenness concealment can be obtained.

That is, the paper wallpaper of the present invention is based on the above findings, and is a paper wallpaper obtained by laminating a surface paper on a backing paper, the surface paper comprising 95 to 40% by weight of natural pulp and 5 to 60 synthetic fibers. It is characterized by being a mixture of weight percent, having an underwater elongation of 1% or less, and having been embossed.
At this time, (1) the surface paper may be formed by laminating an inner paper on the side of the backing paper via an adhesive layer, and (2) a surface paper or a laminate of the surface paper and the inner paper. The embossing is preferably performed before laminating them on the backing paper, and (3) the thickness of the surface layer paper or the laminate of the surface layer paper and the inner paper is determined by embossing after embossing. The thickness is preferably 101 to 300% of the thickness before processing.

  As the backing paper in the paper wallpaper of the present invention, all backing papers used as the backing paper of conventional paper wallpaper can be suitably used as they are.

In the present invention, the surface layer paper laminated on the above backing paper is one in which synthetic fibers are mixed by 5 to 60% by weight, and the underwater elongation is 1% or less in the width direction and longitudinal direction of the paper. use.
Synthetic fibers to be mixed can be synthetic resin fibers such as polyester, polyacryl, polyamide, polyurethane, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyurea, etc., and these may be used alone or as appropriate. Two or more kinds can be used in combination.
If the blending ratio of the synthetic fiber is too small, the technical significance of blending the synthetic fiber does not occur, and in particular, the above-described elongation in water cannot be suppressed to 1% or less, or a desired shapeability can be obtained. This makes it impossible to achieve good embossing, making it difficult to set the thickness of the surface paper after embossing to 101-300% of the thickness of the surface paper before embossing. Due to the roller hooking required at the time, the uneven pattern due to the embossing with a good folding angle is deformed or crushed.
On the other hand, if the amount is too large, the texture as the surface layer paper is inferior or the cost increases.
Considering these, in the present invention, the blend ratio of the synthetic fiber is set to 5 to 60% by weight.

In the present invention, it is important that the underwater elongation of the surface layer paper is 1% or less in the width direction and the longitudinal direction of the paper.
This underwater elongation is defined by JIS as “Testing method for wallpaper base paper” as a method for evaluating the quality of wallpaper. “Underwater elongation (20 ° C., 10 minutes immersion)” is listed in the test items. ) "(JIS P-8127). Note that JIS “wallpaper base paper” is a wallpaper by pattern printing or the like on the surface side of the base paper, and corresponds to a backing paper rather than a surface layer paper in the present invention.
This underwater elongation is generally used for evaluating the physical properties and the like of construction paper on backing paper in wallpaper.
On the other hand, in the present invention, the elongation in water is used as an index indicating the characteristics of the surface paper, and by using this index, the prevention of opening after the construction of the paper wallpaper according to the present invention can be performed regardless of the backing paper. It is intended on paper.

The underwater elongation test method is as follows.
First, two test pieces of 300 mm (dimension in the width direction of the paper) × 50 mm (dimension in the vertical direction of the paper) are left in the air in the standard state for 2 hours or more, and pencils are respectively centered in the width direction and the vertical direction. Draw a straight line and measure the length of the paper on these two straight lines to one digit after the decimal point.
Next, after immersing these test pieces in a water tank containing water for 10 minutes, they are scooped up with a glass plate so as not to be wrinkled, and immediately measured at the same measurement location.
Using these measured values, the following formula is used.
In addition, the calculation is displayed up to one digit after the decimal point and represents the average value of the two images.
[{(Length after immersion) − (length before immersion)} / (length before immersion)] × 100 (%)

  In the present invention, the surface paper is not limited to using a single layer composed of only one sheet, and a plurality of layers composed of two or more layers may be used. In the case where all layers are composed of 5 to 60% by weight of the above synthetic fiber, the elongation in water may be 1% or less in the width direction and the longitudinal direction of the paper. It is sufficient that the layer is 5 to 60% by weight of the synthetic fiber described above and has an underwater elongation of 1% or less in the width direction and the longitudinal direction of the paper. In this case, the other layer may be a middle paper (ordinary paper or the like), a non-woven fabric, a synthetic resin film, or any other appropriate layer.

The surface layer paper (including a laminate of surface layer paper and inner paper, etc., hereinafter the same unless otherwise specified) is embossed before being laminated on the backing paper. is there.
This embossing can be performed by embossing that is usually used in paper wallpaper. In the present invention, the thickness of the surface paper after embossing is 101 to 300% of the thickness of the surface paper before embossing. In order to obtain this thickness reliably and accurately, embossing is preferably performed while heating to such an extent that the mixed synthetic fibers are softened.

  Also, the embossing on the surface paper is performed before the surface paper is laminated on the backing paper in order to keep the backing paper of the product paper wallpaper smooth and to improve the workability on the wall surface of the paper wallpaper. In order to form a minute gap between the backing paper and the surface layer paper, it is possible to satisfactorily express the concavo-convex design by this gap, and by this good concavo-convex design, in the paper wallpaper of the present invention, Excellent land coverability can be obtained.

The embossing is performed so that the thickness of the surface paper after the embossing is 101 to 300%, preferably 150 to 250% of the thickness of the surface paper before the embossing.
If the thickness after embossing is insufficient, the height of the minute gaps formed between the backing paper and the surface paper will not be sufficient, and as a result, a good uneven design will not be formed. It is not possible to give excellent uneven coverability, and even if it is too thick, not only the effect of improving this uneven coverability is saturated, but too thick embossing is difficult to perform well, and the surface layer There is a possibility that paper tears may occur.

The above-mentioned embossed surface layer paper is laminated on the above-mentioned ordinary paper wallpaper backing paper to constitute the paper wallpaper of the present invention.
This lamination may be carried out by any method, but generally, an adhesive is applied to the upper surface of the backing paper or the back surface of the surface paper, and the above surface paper is laminated on the adhesive layer.
The adhesive used at this time is not particularly limited, and for example, a vinyl acetate-ethylene copolymer resin (EVA) emulsion and / or a polyvinyl acetate (PVAc) emulsion described in Japanese Patent No. 3364436 by the applicant of the present application. As will be described later, the adhesive layer formed with an adhesive containing a petroleum wax emulsion has moisture on the surface of the surface layer paper when the paper wallpaper is applied to the wall surface. This is preferable from the viewpoint of preventing the permeation transfer.

Among them, EVA emulsion and / or PVAc and petroleum wax emulsion having a weight ratio of 30/70 to 70/30 (in terms of non-volatile content), particularly 40/60 to 60/40 (in terms of non-volatile content) are preferable.
If there is too much PVAc emulsion and / or EVA emulsion, the moisture permeability of the paper wallpaper becomes too high, and the sticking workability is deteriorated due to the permeation transfer of moisture in the construction paste when sticking to the wall surface. Conversely, if there is too much petroleum wax emulsion, the film formability of the adhesive layer will deteriorate (a uniform film will not be formed), so the moisture permeability of the paper wallpaper will also increase, and the drying speed of the glue will increase, Deteriorates workability.
In addition, the adhesive mainly composed of the PVAc emulsion and / or EVA emulsion and petroleum wax emulsion, if necessary, normally used thickener, thickener, drying retarder, wetting agent, Various additives such as fillers and dispersants may be added.

The amount of the adhesive applied is not particularly limited, but 5 to 80 g / m ² is suitable for the wet state when the adhesive is applied, and ² to 48 g / m ² is suitable for the dry state after drying the adhesive.

  In addition, when laminating inner sheets or the like on the surface layer paper to form a plurality of layers, the above-mentioned adhesive is used as an adhesive used when laminating each layer, and at least one layer of this adhesive is provided. It may be left.

As described above, when the surface paper and the backing paper are laminated, or when the inner paper or the like is laminated on the surface paper to make the surface paper into a plurality of layers, the above-mentioned adhesive is used in at least one layer. It is no longer necessary to attach a film for preventing water penetration to the paper backing paper.
In other words, when constructing the wallpaper, in order to facilitate the construction, after applying the construction glue on the back of the wallpaper, it is folded in a state where the back of the wallpaper is partly attached (bellows), When the construction glue has softened due to moisture, the work is to peel off the wallpaper with the backs of each other attached again and paste it on the wall.
However, the paper wallpaper has a very high moisture permeability, so the drying of the construction glue is very fast, and the construction glue hardens before the wallpaper becomes sufficiently soft, making it difficult to remove the wallpaper neatly. .
In order to solve this problem, measures such as sticking a film that does not allow moisture to pass through on the surface of paper wallpaper to reduce the moisture permeability of water, or applying a large amount of adhesive to delay the drying of construction glue have been made. However, when the film is pasted, the paper that stretches by absorbing a large amount of moisture and the film that does not stretch so much are adhered, so the wallpaper curls after applying the glue, and when a large amount of adhesive is applied, The cost increases, and it takes time to dry the adhesive, and the construction efficiency of the paper wallpaper deteriorates.
In order to avoid such circumstances, in the present invention, instead of sticking the film, the adhesive layer of the prior application by the applicant of the present application is used as the adhesive between the surface paper and the backing paper as described above. It is assumed that it is provided as a layer or as at least one adhesive layer of a surface paper composed of a plurality of layers.

In the paper wallpaper of the present invention, the surface for water repellency, antifouling, scratch resistance, other surface protection, printing imparting, etc. on the above surface paper (that is, the uppermost layer of the present invention). A treatment layer may be provided.
The material of the surface treatment layer is not particularly limited, and any material may be used as long as it is applied to the uppermost layer of a normal paper wallpaper.
This surface treatment layer may be provided at any time before or after embossing of the surface layer paper.

  The paper wallpaper of the present invention configured as described above is applied to a wall surface according to a normal construction method, but the construction glue used at this time is not particularly limited, but the above-mentioned multi-layer surface layer If the above-mentioned adhesive is used when adhering each layer of paper or adhering surface paper and backing paper, moisture in the adhesive may permeate into the surface paper and evaporate from the surface. There is very little and it can improve sticking construction property.

According to the paper wallpaper of the present invention, no openings are generated for a long time after being applied to the wall, and the surface paper can be embossed satisfactorily.
And the uneven pattern by this embossing does not cause deformation such as crushing due to changes in environmental temperature and humidity, and also does not cause deformation such as crushing by roller hanging at the time of sticking to the wall .
Furthermore, according to the paper wallpaper of the present invention, it shows excellent uneven concealment, and walls on which nails are nailed, or where there are minute irregularities due to cuts, dents, incomplete repairs, etc. It can be applied in a good condition.

[Examples 1 to 4]
A paper wallpaper 1 having the configuration shown in FIG. 1 was produced in the following manner.
As the surface paper 2, a single-layer paper made of paper having a basis weight of 120 g / m ² mixed with 15% by weight of polyester fiber and having a water elongation of 0.8% in both the width direction and the longitudinal direction was used.
An acrylic resin emulsion was applied to the surface of the surface paper 2 so as to be 30 g / m ² and dried to obtain a surface treatment layer 3.
Thereafter, the surface layer paper 2 having the surface treatment layer 3 is mechanically embossed so that (thickness after processing / thickness before processing) × 100≈200%, and then 50% by weight of EVA emulsion and petroleum wax emulsion The adhesive 4 consisting of 50% by weight was used to laminate the backing paper 5 shown in Table 1.

[Comparative Examples 1-4]
As a surface paper, except that a polyester fiber is not mixed, a basis weight of 120 g / m ² , except that a single-layer paper made of 1.6% paper in the width direction and the longitudinal direction in water is used. Comparative paper wallpapers were obtained in the same manner as in Examples 1 to 4.

[Comparative Examples 5 and 6]
As the surface paper 2, except for using a single layer paper made of paper having a basis weight of 120 g / m ² , mixed with 15% by weight of polyester fiber, and having 1.6% water elongation in both the width direction and the longitudinal direction. Produced a comparative paper wallpaper in the same manner as in Examples 1-2 and Comparative Examples 1-2.

  The present invention and the comparative paper wallpaper obtained as described above were diluted by 60% of the trade name “Ruamide” manufactured by Yayoi Chemical Co., Ltd. >> was applied to a semi-incombustible gypsum board having a thickness of 9.5 mm, the following evaluation was performed, and the results are shown in Table 1.

(1) Opening of joint part: When 1 week passed after construction, the opening of the butt part (joint part) of the paper wallpaper was measured with a microscope with a scale.
(2) Change in embossed shape (concave / convex pattern): The paper wallpaper before being applied to the gypsum board was left in an atmosphere of 20 ° C and humidity of 40% for the open time shown in Table 1, and embossed visually. The change in shape (uneven pattern) was observed.
(3) Change in embossed shape (concave / convex pattern) by roller application: After the above open time, the paper wallpaper was attached to the gypsum board as described above, and the surface of the paper wallpaper was 5 with a urethane resin roller. After carrying out the sticking construction by rolling the roller strongly, the change in the embossed shape (uneven pattern) was visually observed.

[Examples 5 to 8, Comparative Examples 7 and 8]
The present invention and comparative paper wallpaper were obtained in the same manner as in Example 1 except that the surface paper 2 having the surface treatment layer 3 obtained in Example 1 was mechanically embossed to have the thickness shown in Table 2. .
These paper wallpapers are attached to the same gypsum board used in Examples 1 to 4 and Comparative Examples 1 to 4 with a tack seal (round and red) so that the thickness is 0.2 mm and 0.1 mm. Affixing was performed on this, the following evaluation was performed, and the results are shown in Table 2.

(1) Opening of joint part: When 1 week has passed since construction on the gypsum board, the opening of the butt part (joint part) of the paper wallpaper was measured with a microscope with a scale.
(2) Change in embossed shape (uneven pattern): Leave the paper wallpaper before being applied to the gypsum board in an atmosphere of 20 ° C and 40% humidity for 60 minutes and visually check the embossed shape (uneven pattern). The change of was observed.
(3) Change in embossed shape (concave / convex pattern) by roller application: After leaving the above, the paper wallpaper is pasted on the gypsum board as described above, and the surface of the paper wallpaper is 5 with a urethane resin roller. After carrying out the sticking construction by rolling the roller strongly, the change in the embossed shape (uneven pattern) was visually observed.
(4) Unoccluded concealment property: After standing for 24 hours in the above atmosphere, it was observed visually and evaluated according to the following criteria.
(Double-circle): The tuck seal | sticker of thickness 0.2mm and 0.1mm does not show the unevenness | corrugation resulting from these at all.
○: The tack seal with a thickness of 0.1 mm shows no irregularities, but the tack seal with a thickness of 0.2 mm shows some irregularities.
X: Concavities and convexities are observed on both the 0.2 mm thick and 0.1 mm thick tack seals.

  In Table 2, Comparative Example 7 “-” means that the embossing thickness was 0%, and thus the change in the embossed shape was not evaluated. “-” In Comparative Example 8 represents the surface during embossing. This means that some of the tears were torn and could not be used as a surface paper, and therefore all of the gaps, changes in embossed shape, and non-land concealment were not evaluated.

Example 9
A paper wallpaper 11 having the configuration shown in FIG. 2 was produced in the following manner.
As the surface layer sheet was混抄15 wt% polyester fiber, with a basis weight of 120 g / ^{m 2,} the paper _{2 1} in the width direction and the vertical direction elongation in water of any 0.8%, at a basis weight 120 g / ^{m 2} the width direction and the longitudinal direction of the elongation in water neither of 1.6% paper _{2 2,} using EVA Emarujo and petroleum wax emulsion (weight ratio of 50/50 "nonvolatile matter basis") adhesive 4 'consisting of A paper wallpaper of the present invention was obtained in the same manner as in Example 1 except that a plurality of laminated layers were used.
This paper wallpaper was evaluated in the same manner as in Examples 5 to 8, and the results are shown in Table 3.

(1) Opening of joint part: When 1 week has passed since construction on the gypsum board, the opening of the butt part (joint part) of the paper wallpaper was measured with a microscope with a scale.
(2) Change in embossed shape (uneven pattern): Leave the paper wallpaper before being applied to the gypsum board in an atmosphere of 20 ° C and 40% humidity for 60 minutes and visually check the embossed shape (uneven pattern). The change of was observed.
(3) Change in embossed shape (concave / convex pattern) by roller application: After leaving the above, the paper wallpaper is pasted on the gypsum board as described above, and the surface of the paper wallpaper is 5 with a urethane resin roller. After carrying out the sticking construction by rolling the roller strongly, the change in the embossed shape (uneven pattern) was visually observed.
(4) Unoccluded concealment property: After standing for 24 hours in the above atmosphere, it was observed visually and evaluated according to the following criteria.
(Double-circle): The tuck seal | sticker of thickness 0.2mm and 0.1mm does not show the unevenness | corrugation resulting from these at all.
○: The tack seal with a thickness of 0.1 mm shows no irregularities, but the tack seal with a thickness of 0.2 mm shows some irregularities.
X: Concavities and convexities are observed on both the 0.2 mm thick and 0.1 mm thick tack seals.

The paper wallpaper of the present invention can be favorably used as a paper wallpaper having no openings and as a hair wallpaper having excellent unevenness concealment.
In addition, the uneven pattern by embossing applied to the surface paper of the paper wallpaper of the present invention is not deformed by changes in temperature and humidity in the environment in which the paper wallpaper of the present invention is used, and It can be satisfactorily used as a high-quality paper wallpaper without being deformed by the roller application.

It is sectional drawing for demonstrating the example of 1 embodiment of the paper wallpaper of this invention. It is sectional drawing for demonstrating the other embodiment example of the paper wallpaper of this invention.

Explanation of symbols

1,11 Paper wallpaper 2 Surface paper 3 Surface treatment layer 4, 4 'Adhesive layer 5 Backing paper

Claims (4)

In paper wallpaper made by laminating surface paper on backing paper,
The surface layer paper is obtained by mixing 95 to 40% by weight of natural pulp and 5 to 60% by weight of synthetic fiber, having an underwater elongation of 1% or less, and having been embossed. Paper wallpaper.   2. The paper wallpaper according to claim 1, wherein the inner paper is laminated on the side of the backing paper of the surface layer paper via an adhesive layer.   The paper wallpaper according to claim 1 or 2, wherein the embossing of the surface layer paper or the laminate of the surface layer paper and the inner paper is performed before the lamination to the backing paper.   The thickness of the surface layer paper or the laminate of the surface layer paper and the inner paper is 101 to 300% of the thickness before embossing after embossing. Paper wallpaper as described in.

Images