JPH04108200A - Wall paper having peeling-up property - Google Patents

Abstract

PURPOSE:To provide the subject wall paper not stained with a synthetic resin decorative layer and an adhesive contacting therewith by disposing the synthetic resin decorative layer on backing paper whose both surfaces are covered with covering layers mainly comprising inorganic powder. CONSTITUTION:A synthetic resin decorative layer 3 is disposed on backing paper 1 having covering layers 2 on both the surfaces thereof to provide the objective wall paper, the covering layers 2 mainly comprising inorganic powder (e.g. aluminum hydroxide or talc). The inorganic powder is processed with a binder such as casein into a coating, which is coated on both the surfaces of the backing paper 1 to form the covering layers. The ratio of the binder to the inorganic powder is preferably 5-100 pts.wt. (as the solid content) of the binder per 100 pts.wt. of the inorganic powder. The amount of the coating attached to the backing paper 1 is preferably 5-50g/m<2>.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to synthetic resin wallpaper that has peel-up properties (removability), and specifically relates to wallpaper that can be reliably peeled up when necessary. .

[Conventional technology]

Traditionally, it has been used as wallpaper for ceilings, walls, etc., and can easily be used to express designs such as gravure printing and rotary screen printing.It is also highly durable, and stains can be easily removed. Due to the reason,
Wallpaper made of synthetic resins such as vinyl chloride resin is the mainstream.

Although it has excellent durability and dirt removal properties, the above wallpaper is used quite often in restaurants that require frequent remodeling, or in offices where the interior is updated due to changes in ownership. Can be reupholstered.

By the way, in the above synthetic resin wallpaper, a base coat layer of a synthetic resin such as a vinyl chloride resin is provided on the backing paper, and a foaming or non-foaming synthetic resin ink such as a vinyl chloride resin is applied on the base coat layer. , the above-mentioned gravure printing, rotary screen printing, and other designs are generally applied.

Then, such wallpaper is pasted onto a gypsum board or the like that serves as the base of the wall via an adhesive such as starch paste.

However, if you try to remove such wallpaper,
Even if the lining paper itself has the property of being removable between the eyebrows, the lining paper does not peel off cleanly between the eyebrows, resulting in tearing or an uneven surface.

The reason for this is that when the adhesive is applied, the adhesive soaks into the backing paper, and the synthetic resin, such as the base coat layer formed on the backing paper, soaks into the backing paper when it is applied. It is presumed that this solidifies and inhibits the delamination properties of the backing paper.

Therefore, as a wallpaper that has solved these drawbacks,
It has been proposed to use a backing material in which an intermediate layer made of polyolefin resin is interposed between glass fiber nonwoven fabrics in place of the backing paper. (Refer to Japanese Utility Model Publication No. 59-24502) According to this wallpaper, since the adhesive strength between the intermediate layer made of polyolefin resin and the glass fiber nonwoven fabric is weak, it easily peels off between the layers, and when peel-a-knob, the above-mentioned No such inconvenience will occur.

There are also some that use double-layered paper as the backing paper.

[Problems to be Solved by the Invention] However, in wallpaper using a backing material in which an intermediate layer made of polyolefin resin is interposed between the glass fiber nonwoven fabrics described above, the cost of the backing material is high, and as a result, The cost of wallpaper itself will also rise significantly.

Moreover, this wallpaper is prone to peeling between the polyolefin resin layer and the glass fiber non-woven fabric, and may cause unexpected damage during production, transportation, storage, pasting work, or after pasting on walls, etc. It also has the disadvantage of peeling off.

In addition, even if double-layer paper is used as the backing paper for the latter, the same phenomenon as for general backing paper occurs, that is, adhesives such as starch paste and synthetic resins such as the base coat layer formed on the backing paper When it was applied, it actually seeped into the backing paper, making it impossible to fully utilize the delamination properties of the two-layer paper.

In consideration of the above points, the present invention aims to provide wallpaper that does not peel off unexpectedly and can be reliably peeled off when necessary.

[Means for solving problems]

The gist of the present invention is a wallpaper comprising a synthetic resin decorative layer on a backing paper,
This backing paper is a wallpaper with peel-up properties, characterized in that both sides are covered with a coating layer mainly composed of inorganic powder.

It is in.

The paper lining may be paper made from pulp or the like which is commonly used as lining paper for this type of wallpaper, and is not particularly limited.

Of course, it may also be a paper with improved interlayer peelability, such as a two-layer paper.

The present invention is characterized in that both sides of such backing paper are coated with a layer mainly composed of inorganic powder.

As such inorganic powders, aluminum hydroxide, magnesium hydroxide, titanium oxide, silicon dioxide, aluminum silicate, magnesium silicate, calcium carbonate, zinc oxide, barium sulfate, talc, kaolin, etc. can be used.

These inorganic powders include casein, starch, acrylic resin, vinyl chloride resin, vinyl acetate resin, ethylene-
Vinyl acetate copolymer resin, styrene-butadiene rubber (
It is made into a paint using a binder such as synthetic resin such as SBR), polyvinyl alcohol (PVA), or melamine resin, and is applied to both sides of the backing paper to form a coating layer.

In this case, the paint may be either an emulsion type or a solvent type.

The blending ratio of the binder to the inorganic powder is preferably about 5 to 100 parts by weight in terms of solid content per 100 parts by weight of the inorganic powder; if it is less than 5 parts by weight, the fluidity of the paint will decrease, so Coatability on paper deteriorates, and on the other hand, if it exceeds 100 parts by weight, the hiding properties of the backing paper and the printability of the synthetic resin formed on the backing paper deteriorate.
Further, some binders inhibit the adhesion of the binder to the synthetic resin or adhesive that comes into contact with the backing paper, and if a large amount is used, this tendency tends to be noticeable, which is not preferable.

The amount of this paint applied to the backing paper may be about 5 to 50 g/m'' per side in a dry state.

Furthermore, general coating methods such as a doctor coat, a roll coater, and an air knife coater can be used as the means for coating the backing paper, and these coating methods may be applied directly to the paper making machine or separately after paper production It may be done in a process.

Next, as the synthetic resin decorative layer formed on the backing paper in the present invention, any material generally used for wallpaper can be used, and there are no particular limitations.

The synthetic resin constituting the synthetic resin decorative layer will be explained below using the most popular vinyl chloride resin as an example, but the present invention is not limited thereto, and even synthetic resins such as acrylic resin can be used. good.

As the vinyl chloride resin, vinyl chloride resin alone obtained by general suspension polymerization or emulsion polymerization, or vinyl chloride and vinyl acetate, ethylene, propylene, maleic ester, methacrylic ester, methacrylic ester, and higher vinyl ether are used. In addition to copolymers with other polymers, these include mixtures of these and other polymers.

A plasticizer is generally added to the vinyl chloride resin, and any ordinary plasticizer commonly used for vinyl chloride resins can be used as the plasticizer.

For example, as a plasticizer, phthalic acid di-2-ethylhexyl ester (DOP), phthalic acid dinonyl ester (D
NP), phthalic acid diisononyl ester (DINP),
Phthalate ester plasticizers such as butyl phthalate (BBP) and dibutyl phthalate (DBP), dioctyl adipate (D
.

A), general fatty acid ester plasticizers such as sebacate dioctyl ester (DO3) and azelaic acid dioctyl ester (DOZ), polymer plasticizers such as polyester plasticizers, phosphate triphenyl ester, phosphoric acid cre Phosphate esters such as dilphenyl ester, diphenylisopropylphenyl phosphate, tri-2-ethylhexyl phosphate, octyl diphenyl phosphate, isodecyl diphenyl phosphate, tris dichloropropyl phosphate, tris bromine phosphate Halogen-containing phosphate esters such as chloropropyl ester and halogen-containing plasticizers such as chlorinated paraffin can be used.

The amount of these plasticizers added is 30 to 150 parts by weight, preferably 50 to 1 part by weight, per 100 parts by weight of the vinyl chloride resin.
If the amount is less than 30 parts by weight, the vinyl chloride resin layer becomes hard and difficult to apply as wallpaper, while if it exceeds 150 parts by weight, it becomes too soft and is not preferred as wallpaper.

This vinyl chloride resin layer may be formed on the entire surface of the backing paper, or may be formed partially on the backing paper, or may be formed in a plurality of layers.

Moreover, these layers may be non-foamed layers or foamed layers.

In the case of foaming, foaming can be carried out by using, for example, azodicarbonamide, dinitrosopentamethylenetetramine, oxybishenzenesulfonyl hydrazide, etc., which are foaming agents for vinyl chloride resins. A foaming accelerator or a foaming accelerator may be added thereto.

In addition, vinyl chloride resins contain fillers such as calcium carbonate, titanium oxide, magnesium hydroxide, talc, hydrotalcite, magnesium carbonate, and aluminum hydroxide, and stabilizers such as Ba-Zn, NaZn, and Sn. , antimony trioxide, antimony pentoxide, zinc borate,
Flame retardants such as molyfdenum oxide, various pigments, ultraviolet absorbers, antistatic agents, processing aids, anti-aging agents, etc. can be added as necessary.

Furthermore, when the vinyl chloride resin layer is pasted, diluted cutting with mineral spirit or the like can also be used.

Lamination of this vinyl chloride resin layer onto the backing paper can be done by, for example,
In addition to general coating methods such as doctor coat, roll coater, and air knife coater, which are similar to those used for forming a coating layer mainly composed of inorganic powder on backing paper, printing methods such as gravure printing and rotary screen printing can be applied. method can be adopted.

Note that the wallpaper laminated in this way can be subjected to various surface treatments to make it matte, glossy, impart antifouling properties, increase surface strength, etc., if necessary. .

In addition, from the viewpoint of uneven design, in addition to chemical embossing using a foaming agent, a foaming suppressor, or a foaming accelerator, unevenness may be imparted by mechanical embossing means such as an embossing roll.

(Function) In the present invention, both sides of the backing paper are covered with a coating layer mainly composed of inorganic powder.

This coating layer does not interfere with the adhesion with the synthetic resin decorative layer formed on the upper surface, and is compatible with adhesives such as starch paste applied on the lower surface, and has no adhesion with the wall surface. No impact.

Moreover, although the coating layer exhibits such good adhesion, it exhibits a barrier function that prevents the synthetic resin applied to the upper surface of the coating layer from penetrating into the interior of the backing paper.

Similarly, for adhesives such as starch paste applied to the bottom surface,
Shows the barrier function of preventing adhesive from entering inside the backing paper.

Therefore, the synthetic resin or adhesive does not seep into the lining paper or solidify, and the inside of the lining paper is not contaminated by these substances, and the beer amplification properties inherent to the lining paper are not impaired.

What's more, when the wallpaper is removed, this re-coating layer is soaked with synthetic resin or adhesive and is strengthened, acting as a reinforcing layer to prevent it from tearing during removal. and peels off smoothly.

〔Example〕

As shown in Figure 1, on both sides of a backing paper (1) with a basis weight of 90 g/m 2 made mainly of 90% by weight of pulp and 10% by weight of filler, 100 parts by weight of kaolin was coated with a Add 100 parts by weight of acrylic emulsion and stir and apply the resulting coating paint using a doctor knife to a dry coating weight of 10 g/m'' to form a coating mainly composed of inorganic powder on both sides. A backing paper covered with layer (2) was obtained.

Next, a vinyl chloride resin paste consisting of a one-component composition was rotary screen printed onto the backing paper having the previous coating layer to a size of 150 g/m2.
A wallpaper having a synthetic resin decorative layer (3) made of foamed vinyl chloride resin was obtained by heat treatment at a temperature of 0°C.

Compound (degree of polymerization) Vinyl chloride resin 100DOP
60 stabilizer (Ba-Zn type)
3. Blowing agent (azodicarbonamide)
2 filler (CaCOz)
20 Next, the obtained wallpaper was adhered to a gypsum board (5) using starch paste as the adhesive (4) at a basis weight of 20 g/m'' (in terms of solid content).

After the starch paste used had dried sufficiently, when the pasted wallpaper was peeled off, peeling occurred at the part of the backing paper that was sandwiched between the coating layers mainly made of inorganic powder formed on both surfaces of the backing paper.
It peeled off smoothly without coming off from that part, and showed good beer amplification properties.

In addition, although some of the backing paper remains on the plasterboard side from which the wallpaper has been peeled off, the surface is smooth and there will be no problem in applying the next replacement wallpaper. Ta.

[Comparative example]

A wallpaper was obtained in the same manner as in the previous example except that a coating layer mainly composed of inorganic powder was not provided on both sides of the backing paper.

Next, the obtained wallpaper was attached to a gypsum board in the same manner as in the previous example, and after the starch paste used had dried sufficiently, the attached wallpaper was peeled off, but the phenomenon occurred that it tore into pieces during peeling. occurred, and the peel-up properties were poor. In addition, even on the surface of the part where the peeling was completed without tearing, convex portions were formed here and there due to lumps of starch paste, and the peeled surface was not smooth.

〔Effect of the invention〕

As described above, according to the present invention, which uses a backing paper that has both sides and is covered with a coating layer mainly composed of prize powder, the inside of the backing paper is not contaminated by the synthetic resin decorative layer or adhesive that is in contact with it. Moreover, when the wallpaper is peeled off, these two coating layers serve as reinforcing layers, so the wallpaper can be reliably peeled off without tearing during peeling.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of the wallpaper of the present invention. 1...Backing paper 2...Coating layer mainly composed of inorganic powder 3...Synthetic resin decorative layer 4...Adhesive 5...Gypsum board

Claims (1)

[Claims] 1. A wallpaper having a peel-up property, which is made by providing a synthetic resin decorative layer on a backing paper, and the backing paper is covered on both sides with a coating layer mainly made of inorganic powder. .