JP5247645B2 - Adhesive wallpaper and wallpaper construction method - Google Patents

Description

  The present invention relates to an adhesive composition for wallpaper.

  Architectural interior materials such as wallpaper are required to have excellent design properties in order to enhance the comfort as an indoor living space. In general, wallpaper used for building interiors includes a paper base material laminated with a vinyl chloride resin, an olefin resin, paper decorated with printing or embossing, and the like. Further, as a design having a three-dimensional effect, in recent years, foamed wallpaper (non-vinyl chloride resin wallpaper) using a foamed polyolefin resin has been used in consideration of the environment (Patent Documents 1 and 2). . Starch glue is used to bond these wallpapers, and wallpaper construction is performed by applying starch paste to the wall surface of the wall of the wallpaper or a wall such as gypsum board, and then sticking the wallpaper to the wall. Has been done.

  Originally, in wallpaper re-covering, it is desirable to remove the wallpaper so that it peels between the wallpaper and the wall surface, that is, between the layers of the adhesive. This is because, when renewing the wallpaper, if a new wallpaper is applied where the old wallpaper remains on the wall, the surface will be uneven and the appearance will be very poor, or from the standpoint of fire protection, This is because it has never been possible to completely peel the base material from the wall surface. However, since these wallpapers cannot be easily peeled off or the peeling interface varies significantly, if they are to be completely peeled off, peeling with a peeling agent or the like is required. There is a problem that it takes a lot of time and effort to damage the device. And the starch paste which has been used heretofore has been particularly prominent because of its aggregation property. Furthermore, starch paste generally has a low viscosity, and “sagging” occurs during the application of the starch paste, resulting in problems such as floating of the wallpaper and lack of adhesive force, and the point of stable construction. It was not satisfactory enough.

JP 2007-70789 A JP 2007-55229 A

  Under such circumstances, the present invention has an adhesive wallpaper, an adhesive composition for wallpaper, and an application for wallpaper that have an excellent adhesive force and enable stable application and easy re-attachment. It aims to provide a method.

As a result of intensive studies to achieve the above object, the present inventors have solved the above problems by forming a wall surface adhesion layer using an adhesive composition having a specific hydroxyalkyl cellulose in wallpaper. I found out. The present invention has been completed based on such findings.
That is, the gist of the present invention is as follows.

1. It has at least a base material and a wall surface adhesive layer, the base material is a nonwoven fabric having a weight of 50 to 300 g / m ² , and the JAPAN TAPPI paper pulp test method No. 1: value measured by 2000A method is not less than 20, the wall surface adhesive layer, seen contains hydroxypropyl cellulose on one side of the substrate, and the content of hydroxypropyl cellulose of the total resin solid content of 50 mass % Of the adhesive wallpaper formed by the adhesive composition for wallpaper.
2 . A non-woven fabric having a weight of 50 to 300 g / m ² and a JAPAN TAPPI paper pulp test method No. 1: 2000 Wallpaper having a base material having a value measured by A method of 20 or more, or a wall surface containing hydroxypropyl cellulose, and the content of hydroxypropyl cellulose in the total resin solid content is 50% by mass or more A method for constructing wallpaper in which an adhesive composition is applied and the wallpaper is adhered to the wall surface.

  ADVANTAGE OF THE INVENTION According to this invention, when constructing wallpaper, the adhesive composition for wallpaper has excellent adhesive force, enables stable construction, and can be easily reattached, and a wall surface adhesive layer using the same. The formed adhesive wallpaper and a method for constructing the wallpaper can be provided.

It is a schematic diagram which shows the cross section of the adhesive wallpaper of this invention. It is a schematic diagram which shows the cross section of the adhesive wallpaper of this invention. It is a schematic diagram which shows the cross section of the adhesive wallpaper of this invention.

  The adhesive wallpaper of the present invention has at least a base material and a wall surface adhesive, and the JAPAN TAPPI paper pulp test method No. 1: 2000 The value measured by the A method is 20 or more, and the wall surface adhesive layer is formed on one surface of the base material by the adhesive composition for wallpaper of the present invention containing hydroxypropyl cellulose. . First, the wallpaper adhesive composition of the present invention will be described.

[Adhesive composition for wallpaper]
《Hydroxypropylcellulose》
The adhesive composition for wallpaper of the present invention contains hydroxypropyl cellulose. Hydroxypropyl cellulose is a hydroxypropyl ether of cellulose obtained by etherifying a hydroxyl group of a glucose unit which is a constituent unit of cellulose with a hydroxypropyl group, in other words, a hydroxyl group of a glucose unit which is a constituent unit of cellulose is substituted with a hydroxypropoxy group. It is obtained.

  The hydroxypropyl cellulose used in the present invention preferably has a weight average molecular weight of 200,000 or more, more preferably 300,000 or more, and 500,000 or more for the purpose of ensuring good coatability of the adhesive composition. Is more preferable. Here, the said weight average molecular weight is the value of polystyrene conversion measured by the gel permeation chromatography (GPC) method.

  Moreover, the hydroxypropyl cellulose used in the present invention preferably has a hydroxypropoxyl group substitution amount of 50 to 80% by mass, more preferably 60 to 75% by mass. If the amount of substitution is within the above range, excellent adhesive strength can be obtained. Here, the substitution amount is a value obtained by a quantitative method based on the Japanese Pharmacopoeia.

<< Hydroxypropyl methylcellulose >>
The wallpaper adhesive composition of the present invention can contain hydroxypropylmethylcellulose. In the adhesive composition of the present invention, when hydroxypropylmethylcellulose is used, it is preferable because the adhesive composition can be made inexpensive while maintaining excellent adhesive force. Further, by adjusting the coating amount of the adhesive composition, for example, by adjusting the coating amount to about 40 to 60 g / m ² , a gentle adhesive force can be obtained. It is preferable to use methylcellulose.

  The weight average molecular weight of the hydroxypropyl methylcellulose used in the present invention is preferably 200,000 or more, more preferably 250,000 or more. It is preferable that the hydroxypropylmethylcellulose has a weight average molecular weight within the above range since the coating property of the adhesive composition is improved. Here, the weight average molecular weight is a value in terms of polystyrene measured by a gel permeation chromatography (GPC) method.

  Moreover, it is preferable that the substituted amount of a hydroxypropoxyl group is 1-20 mass%, and, as for the hydroxypropyl methylcellulose used by this invention, 3-15 mass% is more preferable. If the amount of substitution is within the above range, excellent adhesive strength can be obtained. Here, the substitution amount is a value obtained by a quantitative method based on the Japanese Pharmacopoeia.

  In the present invention, one kind of hydroxypropyl cellulose may be used, or two or more kinds of hydroxypropyl cellulose having different weight average molecular weights may be used, and two or more kinds of hydroxypropyl having different hydroxypropoxyl group substitution amounts. Cellulose may be used. In the present invention, one kind of hydroxypropylmethylcellulose may be used, or two or more kinds of hydroxypropylcellulose having different weight average molecular weights may be used.

<Other resin components>
Furthermore, the adhesive composition for wallpaper of the present invention may contain other resin components as long as it does not hinder the peeling between the wallpaper and the wall surface. Other resin components include starch paste, ethylene-vinyl acetate adhesive, (meth) acrylic resin, polyurethane resin, epoxy resin, polyester resin, polyamide resin, (meth) acrylic ester-olefin system Preferred examples include copolymer resins, ionomer resins, and olefin-α olefin copolymer resins.

<Composition of resin component>
The adhesive composition for wallpaper of the present invention contains the above-described hydroxypropylcellulose as a resin component as an essential component, and optionally contains hydroxypropylmethylcellulose and other resin components.
In the present invention, when the total of these resin components is defined as the total resin solid content, the content of hydroxypropylcellulose in the total resin solid content is preferably 50% by mass or more, and 75% by mass or more. Is more preferable, and 85 mass% is further more preferable. If the content of hydroxypropyl cellulose in the total resin solid content is within the above range, it has excellent adhesive force, and stable adhesive force can be obtained even if the coating amount varies. For the same reason, the content of hydroxypropylcellulose with respect to the total of hydroxypropylcellulose and hydroxypropylmethylcellulose is preferably 50% by mass or more, more preferably 75% by mass or more, and even more preferably 85% by mass. .

"solvent"
The wallpaper adhesive composition of the present invention preferably contains a solvent for the purpose of ensuring coatability. Examples of the solvent include water, aliphatic hydrocarbons such as pentane, hexane, heptane, cyclopentane, cyclohexane, isopentane, and methylpentane, and aromatic hydrocarbons such as benzene, toluene, and xylene. Of these, water is preferable from the viewpoints of consideration for the environment, workability, economy, and the like.

The content of the solvent in the adhesive composition for wallpaper of the present invention may be appropriately selected and adjusted in consideration of the coating property of the adhesive composition and the workability of the wallpaper. The resin solid content is in the range of 1 to 20% by mass, preferably 1 to 10% by mass.
In consideration of the coating property and the workability of the wallpaper, the viscosity of the adhesive composition for wallpaper of the present invention is preferably in the range of 10,000 to 50,000 m · Pa · s, preferably 25,000 to 48000 m · Pa · s. A range of s is more preferable. If the viscosity is within the above range, when the adhesive composition is applied to the wall surface, it is easy to apply, so that the coating property is improved and the coating property of the wallpaper is not reduced. Will also improve. Here, the viscosity of the adhesive composition is a value measured with a B-type viscometer.

《Other ingredients》
The wallpaper adhesive composition of the present invention can contain pigments, preservatives, viscosity modifiers, and the like within a range that does not impair the applicability and adhesion.
Examples of the pigment include inorganic pigments such as titanium white, zinc white, petal, vermilion, ultramarine, cobalt blue, titanium yellow, yellow lead, and carbon black, isoindolinone, Hansa Yellow A, permanent red 4R, phthalocyanine blue, Preferable examples include organic pigments (including dyes) such as aniline black, metal pigments such as aluminum and brass, pearlescent pigments made of foil powder such as titanium dioxide-coated mica and basic lead carbonate, and the like.

Preservatives include nitrogen-containing heterocyclic compounds such as pyridine, imidazole, benzimidazole, triazine, triazole, thiazole, benzthiazole, isothiazoline, quaternary ammonium salts, phenols, and alcohols. Organic preservatives such as carboxylic acids or salts or esters thereof, inorganic preservatives containing heavy metal ions (such as silver ion-containing materials) and salts thereof, and mixtures thereof. Of these, pyridine-based, isothiazoline-based, and mixtures thereof are more preferable.
The content of the preservative in the adhesive composition is usually about 0.1 to 3% by mass from the viewpoint of not sufficiently reducing the adhesive force while obtaining the effect of adding the antiseptic sufficiently. Mass% is preferred.

  As the viscosity modifier, for example, inorganic fillers such as alumina, silica, aerosil, calcium carbonate, aluminum hydroxide, magnesium hydroxide, talc, bentonite, barium sulfate, acrylic, urethane, nylon, polypropylene, urea resin, etc. Organic fillers consisting of, styrene crosslinked filler, benzoguanamine crosslinked filler and the like.

  The adhesive composition thus obtained has excellent adhesive force when constructing a wallpaper, and has a small difference in adhesive force due to uneven coating amount, thereby enabling stable construction. In addition, it can be easily reapplied, and is particularly excellent in terms of reapplying at the time of field work when the wallpaper and the base of the wall are not completely attached.

[Adhesive wallpaper]
The adhesive wallpaper of the present invention has at least a base material and a wall surface adhesive, and the JAPAN TAPPI paper pulp test method No. 1: 2000 The value measured by the A method is 20 or more, and the wall surface adhesive layer is formed on one surface of the base material by the adhesive composition of the present invention. The configuration of the adhesive wallpaper of the present invention is not particularly limited as long as it has the above-described base material and wall surface adhesive layer, for example, on the surface opposite to the surface provided with the wall surface adhesive layer of the base material, Vinyl chloride resin, olefin-based resin, paper decorated with printing or embossing, etc., or a laminate of foamed polyolefin resin, etc. in recent years due to environmental considerations. Is mentioned. Among these, from the viewpoint of design properties, a laminate of foamed polyolefin resins is preferable.

  An example of the preferable aspect of the adhesive wallpaper of this invention is demonstrated using FIGS. 1-3 is a schematic diagram showing a cross section of an example of an adhesive wallpaper 1 having a preferred layer structure of the present invention. In the example shown in FIG. 1, the adhesive wallpaper 1 of the present invention comprises a resin layer 3 (in the case of FIG. 1, a foamed resin layer 32, in the case of FIG. The resin layer 32 and the non-foamed resin layer 33 are sequentially laminated, and the wall surface adhesive layer 4 is laminated on the back surface of the substrate 2. In the case of FIG. 3, a resin layer 3 (consisting of an adhesive resin layer 31, a foamed resin layer 32, and a non-foamed resin layer 33), a picture layer 5, an adhesive layer 6, and a film layer 7 are formed on the substrate 2. And the surface protective layer 8 are sequentially laminated, and the wall surface adhesive layer 4 is laminated on the back surface of the substrate 2.

<< Substrate 2 >>
The base material 2 used in the present invention is a JAPAN TAPPI paper pulp test method No. The value measured by 1: 2000 A method (hereinafter referred to as wax picking method) is required to be 20 or more. Further, from the viewpoint of facilitating reattachment during wallpaper construction, the value measured by the wax picking method of the substrate 2 is preferably 23 or more, and more preferably 25 or more.

As such a substrate, for example, a paper-reinforced paper (resin-impregnated paper) such as a thin paper in which a synthetic resin such as an acrylamide resin is added and mixed to enhance the paper strength, a nonwoven fabric, etc. are preferably mentioned. Nonwoven fabric is more preferable.
Examples of the nonwoven fabric include a wet nonwoven fabric and a dry nonwoven fabric. Examples of the wet nonwoven fabric include a papermaking type, and examples of the dry nonwoven fabric include an adhesive type, a mechanical bond type (needle punch, stitch bond), and a spun bond type. More specifically, rayon paper, a mixture of pulp, Japanese paper, glass nonwoven fabric, asbestos nonwoven fabric, polyester nonwoven fabric, or the like can be used as the nonwoven fabric. Among these, a wet nonwoven fabric is preferable, and a nonwoven fabric mixed with pulp is particularly preferable. By adopting these base materials, it becomes easy to reattach the wallpaper.

  Moreover, when the base material used for this invention is a nonwoven fabric, it is preferable that 50% or more of the organic content contained in this base material is a pulp, and it is more preferable that it is 60% or more. Moreover, as an upper limit, 90% or less is preferable and 85% or less is more preferable. It is preferable for the content of the pulp in the base material to be within the above-mentioned range since the foaming treatment of the foamed resin layer described later can be sufficiently performed, and the heat foaming process at 200 ° C. or higher can be stably performed.

These materials may be used alone, but may be a laminate of any combination, such as a composite of papers, and if necessary, flame retardant, inorganic agent, dry paper strength enhancer, A wet paper strength enhancer, a colorant, a sizing agent, a fixing agent, and the like may be appropriately added.
The thickness of the substrate 2 is not particularly limited, but the weight is about 50 to 300 g / m ² , preferably 55 to 160 g / m ² . In particular, a range of 60 to 160 g / m ² is preferable in order to pick up the unevenness of the groundwork during the construction of the wallpaper and make the so-called unevenness inconspicuous. Such a base material is available as a commercial product, and examples thereof include commercial products such as “8241 (product number)” and “8242 (product number)” manufactured by Ahlstrom.

[Wall surface adhesive layer 4]
The wall surface adhesive layer 4 is a layer for imparting adhesiveness to the wallpaper of the present invention and facilitating the construction of the wallpaper, and is formed by the adhesive composition for wallpaper of the present invention. The peel strength (adhesive force) to the gypsum board based on the gypsum board (GB-R) specified in JIS A6901 of the wall surface adhesive layer 4 is preferably 1 to 7 N / 25 mm, and 1.5 to 7 N / 25 mm is more preferable, and 3 to 6 N / 25 mm is more preferable. If the adhesive strength is within the above range, it is preferable because it is easy to reattach the wallpaper, and this effect can be obtained particularly in combination with the inter-paper strength of the base material (value measured by the wax picking method). it can. Moreover, the adhesive force in this invention is the adhesive force measured by the said method 48 hours after sticking the adhesion wallpaper.

The wall surface adhesive layer 4 is preferably formed at a coating amount of 30 to 250 g / m ² (wet), more preferably 100 to 250 g / m ² (wet), and even more preferably 100 to 150 g. / M ² (wet). When the coating amount of the adhesive composition is within the above range, excellent adhesive force and construction stability can be obtained, and re-sticking can be easily performed. It is also economically advantageous.

<< Foamed resin layer 32 >>
The adhesive wallpaper of the present invention preferably has a foamed resin layer 32 for the purpose of improving design properties. The foamed resin layer 32 is preferably obtained by foaming a foamed resin composition made of a thermoplastic resin containing a foaming agent. The foamed resin composition may be cross-linked by irradiation with active energy rays such as electron beams, ultraviolet rays and γ rays.

  In the present invention, the foamed resin layer 32 is crosslinked when the gel fraction of the foamed resin layer 32 is 0.5 to 60%, preferably 0.5 to 30%, more preferably 1 to 10%. It means that there is. Since the foamed resin layer 32 is cross-linked, a foamed layer with few continuous pores and many independent micropores can be formed during the foaming process described later. Here, the gel fraction is determined by placing a thermoplastic resin (described later) used for the foamed resin layer 32 under reflux of the solvent, measuring the weight of the undissolved portion, and the weight of the thermoplastic resin before placing under reflux. It is the value which calculated the ratio.

(Thermoplastic resin)
Thermoplastic resins include polyethylene, polypropylene, polystyrene, polyolefin resins such as ethylene-vinyl acetate copolymer resin (EVA), ethylene- (meth) acrylic acid resins, acrylic resins, polycarbonate resins, polyester resins And thermoplastic resins such as polyurethane resins and copolymers, and mixed resins thereof.
From the viewpoint of environmental protection, polyolefin resins are preferable, polyethylene resins are more preferable, and ethylene-vinyl acetate copolymer resin (EVA), ethylene-methyl methacrylate copolymer resin (EMMA), or ethylene- ( It is preferable to use at least one of (meth) acrylic acid copolymer resins. Moreover, ethylene-methacrylic acid copolymer resin (EMAA) is preferable among ethylene- (meth) acrylic acid copolymer resins.

  When using ethylene-methyl methacrylate copolymer resin (EMMA) or ethylene- (meth) acrylic acid copolymer resin (EMAA), from the viewpoint of obtaining excellent scratch resistance, wear resistance, etc. The content of (meth) acrylic acid in the copolymer resin is preferably about 4 to 20% by mass.

(Foaming agent)
Examples of the foaming agent include inorganic foaming agents such as sodium bicarbonate, sodium carbonate, ammonium bicarbonate, ammonium carbonate, and ammonium nitrite, nitroso compounds, azo compounds, and azide compounds. Low cost, low heat of decomposition, excellent flame retardancy and self-extinguishing properties, stable in water, non-toxic, and capable of processing heat decomposition chemical foaming agent below decomposition temperature Therefore, a thermally decomposable foaming agent of an azo compound such as azodicarbonamide or azobisformamide is preferable.

  The addition amount of the foaming agent is preferably 0.5 to 15 parts by mass with respect to 100 parts by mass of the thermoplastic resin constituting the foamed resin layer 32. If necessary, a foaming aid that accelerates the decomposition of the foaming agent can be used in combination in order to obtain a further foaming effect. For example, when azodicarbonamide is used as the foaming agent, zinc oxide, lead sulfate, urea, zinc stearate or the like is used as the foaming aid.

(Inorganic filler)
The foamed resin composition used for forming the foamed resin layer 32 can contain an inorganic filler for the purpose of imparting an effect of suppressing see-through, improving surface characteristics, or flame retardancy to the adhesive wallpaper. There is no restriction | limiting in particular as an inorganic filler used for the adhesive wallpaper of this invention, A various thing can be used.

  Examples of the inorganic filler include calcium carbonate, magnesium carbonate, silica, kaolin, clay, calcium oxide, magnesium oxide, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, talc, calcium silicate, magnesium sulfate, calcium sulfate, Examples thereof include magnesium phosphate, glass flake, magnetic powder, cement, glass powder, diatomaceous earth, and hydrated gypsum. Among these, aluminum hydroxide is preferable because it has a low decomposition temperature, a large endothermic amount, and low cost. These inorganic fillers can be used alone or in combination of two or more.

Many of these inorganic fillers have the effect of imparting flame retardancy to the adhesive wallpaper of the present invention, and the effect is further increased when incorporated in a large amount. The amount of the inorganic additive used is preferably 1 to 100 parts by mass with respect to 100 parts by mass of the thermoplastic resin constituting the foamed resin layer 32 for the purpose of obtaining the effect of suppressing see-through and improving the surface characteristics. From 70 parts by mass, more preferably 100 parts by mass or more with respect to 100 parts by mass of the thermoplastic resin constituting the foamed resin layer 32 for the purpose of obtaining sufficient flame retardancy of the adhesive wallpaper.
5-25 micrometers is preferable and, as for the average particle diameter of the inorganic filler used in this invention, 5-15 micrometers is more preferable.

  These inorganic fillers may be used as they are, but the inorganic fillers are previously silane-based, titanate-based, aluminate-based, zircoaluminum-based coupling agents, phosphate-based, fatty acid-based surfactants, You may process by fats and oils, wax, a stearic acid, a silane coupling agent, etc.

(Various additives, etc.)
The foamed resin composition constituting the foamed resin layer 32 can contain a cell adjusting agent and a pigment as necessary. The foamed resin composition constituting the foamed resin layer 32 can contain various additives depending on the required physical properties. Examples of various additives include lubricants, fungicides, insect repellents, antiseptics, antibacterial agents, diluents, deodorants, light stabilizers, plasticizers, and the like.

(Formation method)
The foamed resin layer 32 is formed by, for example, emulsifying a foamed resin composition containing the resin as described above into an emulsion composition, or by pelletizing a foamed resin composition by extrusion using a comma coater method or a T-die. It can be formed by a known method such as a film method, a calendering method, or a dry lamination method using an adhesive.

<Crosslinking treatment>
The foamed resin composition is subjected to a crosslinking treatment by irradiation with an active energy ray such as an electron beam, an ultraviolet ray or a γ ray, and more preferably an electron beam for the purpose of strengthening the foamed resin layer and facilitating reattachment during construction. be able to. When the foamed resin composition is subjected to a crosslinking treatment, the foamed resin composition can contain a crosslinking agent as necessary.

<Foaming treatment>
The foamed resin layer 32 can be foamed by a known foaming method. For example, the foamed resin layer 32 can be foamed at a temperature of about 180 to 240 ° C. using a foaming heating furnace. The foaming treatment can be performed without particular limitation as long as the foamed resin composition is formed into a film as the foamed resin layer 32, but is usually performed after the above-described crosslinking treatment.

The foaming ratio in forming the foamed resin layer is not particularly limited, but is preferably in the range of 2 to 15 times, and more preferably 3 to 10 times. If the expansion ratio is within the above range, when constructing the wallpaper, it can be easily constructed without spreading the groundwork, and the seam of the groundwork is not spread, making it difficult for hair cracks to occur, and obtaining good strength and workability. be able to.
Further, the thickness of the foamed resin layer 32 is not particularly limited and can be appropriately set according to desired characteristics and the like, but is preferably 50 to 300 μm in the film forming state, and the thickness after foaming is preferably 350 to 1200 μm. .

<< Adhesive resin layer 31 and non-foamed resin layer 33 >>
The adhesive resin layer 31 is a layer provided as needed for the purpose of improving the adhesive force between the foamed resin layer 32 and the substrate 2, and the non-foamed resin layer 33 is an ink used for the pattern layer 5 described later. It is a layer provided as necessary for the purpose of suppressing the penetration of the composition into the substrate 2 via the foamed resin layer 32. These layers are formed by an adhesive resin composition and a non-foamed resin composition each containing a resin and various additives, and may be formed by the same composition or by different compositions. Also good.

(resin)
The resin constituting the adhesive resin layer 31 and the non-foamed resin layer 32 is not particularly limited, but is a thermoplastic resin such as polyolefin resin, methacrylic resin, thermoplastic polyester resin, polyvinyl alcohol resin, or fluorine resin. A single-piece | unit and various copolymer resin can be mentioned, Especially, polyolefin resin is preferable.

The polyolefin resin is preferably at least one selected from ethylene-vinyl acetate copolymer (EVA) and ethylene-methacrylic acid copolymer (EMAA).
EVA and EMAA are not particularly limited, and known or commercially available products can be used. In particular, EVA is preferably such that the vinyl acetate component (VA component) is 10 to 30% by mass, and more preferably 15 to 30% by mass. Further, EMAA preferably has a methacrylic acid component (MAA component) of 10 to 30% by mass, and more preferably 15 to 30% by mass. If these components are within the above range, it is preferable because curling of the wallpaper can be suppressed and the foamed resin layer 32 can be sufficiently crosslinked.

(Various additives)
The adhesive resin layer 31 and the non-foamed resin layer 32 can contain various additives as necessary. For example, an inorganic filler can be added to increase the weight, a flame retardant can be added to provide flame retardancy, or various rubbers such as diene rubber, hydrogenated diene rubber, and olefin elastomer can be added to make the resin flexible. , Impact resistance, and easy adhesion can be imparted. Moreover, a pigment can be added and transparent coloring or opaque coloring can also be given.

(Formation of adhesive resin layer 31 and non-foamed resin layer 33)
The adhesive resin layer 31 and the non-foamed resin layer 33 are, for example, those obtained by emulsifying the adhesive resin composition and the non-foamed resin composition containing the resin as described above into an emulsion composition, or pelletized, respectively. Can be formed by a known method such as a comma coater method, an extrusion film forming method using a T-die, a calender film forming method, or a dry lamination method using an adhesive.

  The thickness of the adhesive resin layer 31 is preferably 3 to 20 μm, more preferably 3 to 15 μm, from the viewpoint of obtaining a sufficient adhesive effect and heat resistance. The thickness of the non-foamed resin layer 33 is preferably 5 to 20 μm, more preferably 7 to 12 μm, for the purpose of obtaining excellent surface characteristics and ensuring the unevenness followability of wallpaper by embossing.

  As the non-foamed resin layer 33, a transparent or opaque commercially available film made of the above resin can also be used. The commercially available film is preferably a polyolefin resin such as a polyolefin resin film, a polyolefin resin coated with a urethane or acrylic coating agent, or an ethylene-vinyl alcohol copolymer resin film. Among them, it is excellent in performance such as stain resistance, scratch resistance, chemical resistance, etc., and exhibits excellent uneven followability in embossing, that is, the tensile elongation in the longitudinal direction is sufficiently large, without collapsing due to ionizing radiation, An ethylene-vinyl alcohol copolymer resin film is preferable because of low production cost and low smoke density during combustion.

  When using a commercially available film for the non-foamed resin layer 33, the thickness is preferably 5 to 25 μm, and more preferably 12 to 20 μm. If the thickness of the film is within the above range, it is possible to obtain excellent surface characteristics without being restricted in the production of the film, and to ensure unevenness of the wallpaper by embossing.

<< Picture layer 5 >>
The pattern layer 5 is a layer that is preferably provided in order to give the base material 2 decorativeness, and is formed by printing various patterns using an ink composition and a printing machine. In general, it can be formed with ink by a known printing method such as gravure printing, offset printing, silk screen printing, transfer printing from a transfer sheet, and the like. Patterns include stone patterns that simulate the surface of rocks such as wood grain patterns, marble patterns (for example, travertine marble patterns), fabric patterns that simulate cloth and cloth-like patterns, tiled patterns, brickwork patterns, There are also patterns such as marquetry and patchwork that combine these.

<< Film Layer 7 >>
The film layer 7 is a layer that is laminated on the upper surface of the picture layer 5 as necessary via an adhesive layer 6. The adhesive wallpaper of the present invention has a stain resistance, cellophane tape resistance, scratch resistance, It is provided for imparting surface properties such as chemical resistance.
Examples of the thermoplastic resin used in the film layer 7 of the present invention include thermoplastic resins such as polyolefin resins such as polyethylene, polypropylene, and polybutene, methacrylic resins, thermoplastic polyester resins, polyvinyl alcohol resins, and fluorine resins. In addition, from the viewpoint of production efficiency, a transparent or translucent commercially available film made of the above resin can be preferably used.

Examples of the commercially available film include an olefin-based resin film that can be used for the non-foamed resin layer 33 in addition to a fluorine-based resin film, and among them, an ethylene-vinyl alcohol copolymer resin film is preferable.
The thickness of the film used for the film layer 7 of the present invention is preferably 10 to 25 μm. If the thickness of the film is within the above range, it is possible to ensure the unevenness followability of the wallpaper by embossing without being restricted in the production of the film.

<< Surface protective layer 8 >>
The surface protective layer 8 is laminated on the outermost surface of the adhesive wallpaper of the present invention to improve surface characteristics such as stain resistance, cellophane tape resistance, scratch resistance and chemical resistance of the adhesive wallpaper. The surface protective layer 8 is formed of a resin composition containing a thermoplastic resin, a thermosetting resin, an ionizing radiation curable resin, or the like.

Examples of the thermoplastic resin used in the surface protective layer 8 include acrylic resins, polyester resins, thermoplastic urethane resins, vinyl acetate resins, and cellulose resins. Examples of the thermosetting resin include phenol resin, urea resin, diallyl phthalate resin, melanin resin, guanamine resin, unsaturated polyester resin, urethane resin, epoxy resin, aminoalkyd resin, melamine-urea cocondensation resin, silicon resin, Examples include polysiloxane resins and curable acrylic resins.
Examples of the ionizing radiation curable resin used for the surface protective layer 8 include those having (meth) acrylate functional groups that are cured by ionizing radiation such as ultraviolet rays and electron beams, such as polyester resins having a relatively low molecular weight, Preferred are polymerizable oligomers or prepolymers such as (meth) allylates of polyfunctional compounds such as ether resins, acrylic resins, epoxy resins, urethane resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and polyhydric alcohols. Can be mentioned.

(Silicone (meth) acrylate)
When ionizing radiation curable resin is used for the surface protective layer 8, it is preferable to contain silicone (meth) acrylate for the purpose of improving surface properties such as stain resistance of wallpaper. Conventionally known silicone (meth) acrylates can be used, and are not particularly limited as long as the organic group is a (meth) acrylic group, and a modified silicone oil having 1 to 6 organic groups can be preferably used. .
The content of the silicone (meth) acrylate is preferably 0.5 to 4 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin, from the viewpoint of sufficiently improving the stain resistance and obtaining its use effect. More than 0-2.5 mass parts is more preferable, and 1.5-2.5 mass parts is still more preferable. Moreover, as a functional group equivalent (molecular weight / functional group number) of silicone (meth) acrylate, what has the conditions of 100-20000, for example, Preferably it is 100-10000 is mentioned.

(Other additives)
If necessary, the resin composition for forming the surface protective layer 8 can be used by further adding a curing agent such as a crosslinking agent and a polymerization initiator, a polymerization accelerator, a solvent, a viscosity modifier and the like.

  The surface protective layer 8 is formed by forming a film by crosslinking and curing the resin composition as described above by a known method. The formed surface protective layer 8 has various functions by adding various additives, for example, a so-called hard coat function, anti-fogging coat function, anti-fouling coating function, anti-glare, having high hardness and scratch resistance. A coating function, an antireflection coating function, an ultraviolet shielding coating function, an infrared shielding coating function, and the like can also be imparted.

<< Adhesive layer 6 >>
When the adhesiveness between the film layer 7 and the non-foamed resin layer 33 is low, for example, when an ethylene-vinyl alcohol copolymer resin film is used for the film layer 7, an adhesive layer 6 is provided between the two layers as necessary. It is preferable to provide it. As the adhesive used for the adhesive layer 6, from the production process of the present invention, it is generally solid at ordinary temperature, melts or softens by heating, exhibits adhesiveness, and solidifies and adheres firmly when cooled. The thermosensitive adhesive which has the thermoplastic resin which has as a main component is preferable. Specific examples of the thermoplastic resin include (meth) acrylic resin, polyurethane resin, polyester, (meth) acrylic ester-olefin copolymer resin, vinyl chloride-vinyl acetate copolymer resin, ethylene- Easy-adhesive resins such as vinyl acetate copolymer resins and copolymers, or mixed resins thereof, thermoplastic resins that are the main components of olefin resins and foamed resin compositions, and heat that is the main component of the film layer 7 The blended product with a plastic resin is mentioned.

  In addition to providing an adhesive layer, in order to improve the interlayer adhesion, if desired, a physical layer such as an oxidation method such as a corona discharge treatment or an unevenness method such as a sandblasting method on one side or both sides of the film layer 7 may be used. Chemical surface treatment can be applied.

<< Primer layer 8 >>
The adhesive wallpaper of the present invention is provided with a primer layer 8 between these layers as necessary for the purpose of improving the adhesion between the ionizing radiation curable resin composition used for the surface protective layer 8 and the film layer 7. Can be provided. The resin preferably used in the primer layer 8 is, for example, excellent in adhesion between the resin used in the film layer 7 and an ionizing radiation curable resin composition such as acrylic resin, polyurethane resin, and urethane-acrylic resin. Can be used. Moreover, the primer layer 8 can also be provided between the foamed resin layer 32 and the non-foamed resin layer 33 and between the non-foamed resin layer 33 and the film layer 7 for the purpose of reinforcing the interlayer adhesion.

<Uneven pattern>
The adhesive wallpaper of the present invention is preferably provided with an uneven pattern by embossing in order to impart excellent design properties. A well-known sheet or rotary embossing machine is used to form the concavo-convex pattern. The shape of the concavo-convex pattern includes: wood grain pipe groove, stone plate surface unevenness, cloth surface texture, satin texture, sand texture, hairline, There are striated grooves.

《Method for manufacturing adhesive wallpaper》
The adhesive wallpaper of the present invention is manufactured by, for example, the following manufacturing method, but is not limited thereto.
The resin constituting the primer layer 8 and the ionizing radiation curable resin composition are sequentially applied to one surface of the film layer 7 made of a thermoplastic resin film, and an adhesive and a primer layer are applied to the other surface as necessary. A constituent resin is applied, and a predetermined ionizing radiation is further applied to crosslink and cure the ionizing radiation curable resin composition to obtain a surface protective sheet. On the other hand, a foamed resin composition comprising an adhesive resin composition containing a resin constituting the adhesive resin layer 31 on the substrate 2, and a thermoplastic resin containing a foaming agent, an inorganic filler, and other additives as necessary. 32 is laminated with an adhesive resin layer 31 and a foamed resin layer 32 obtained by simultaneous film formation by an extrusion film forming method using a T-die (adhesive resin layer 31, foamed resin layer 32, non-foamed resin as necessary) After the ink composition constituting the pattern layer 5 is applied by gravure printing, the adhesive resin layer 31, the foamed resin layer 32, and the non-foamed resin layer 33 are irradiated with an electron beam. Is then cured by crosslinking, and the foamed resin composition is foamed at about 250 ° C. using a heating foaming furnace to form a foamed resin layer 32 to obtain a base sheet. Next, after the substrate sheet is cooled, it is reheated to about 150 ° C. and then between the cooling roll (surface protective sheet side) and the pressure roll on which the embossed plate is formed from the outermost layer side of the surface protective layer sheet. Both sheets are thermocompression-bonded by passing, and after forming a concavo-convex pattern, cooling is performed to obtain a wallpaper in which the concavo-convex pattern is formed from the outermost layer side of the surface protective layer 8 to the adhesive resin layer 31. By applying the wallpaper adhesive composition of the present invention to the surface of the obtained wallpaper opposite to the side on which the foamed resin layer 32 is provided, the adhesive wallpaper of the present invention can be obtained. In addition, as above-mentioned, a primer layer and an adhesive bond layer can further be provided between desired layers.

  The adhesive wallpaper obtained in this way has excellent adhesive force when constructing the wallpaper, enables stable construction and can be easily reattached. It is excellent in the point of re-sticking at the time of renovation like sticking to.

[Wallpaper construction method]
The wallpaper construction method of the present invention is characterized in that the adhesive composition of the present invention is applied to a wallpaper or a wall surface, and the wallpaper is adhered to the wall surface.
In the wallpaper construction method of the present invention, the type of wallpaper is not particularly limited, and excellent adhesive strength, construction stability, and ease of reattachment can be obtained with any wallpaper. Among them, the wallpaper construction method of the present invention is based on the JAPAN TAPPI paper pulp test method no. 1: 2000 Adopted suitably for the construction of wallpaper having a substrate whose value measured by the A method is 20 or more.
The wallpaper adhesive composition may be applied to either the wallpaper or the wall surface, and can be performed by a known method such as a bar coating method. Further, the coating amount is preferably 30~250g / m ² (wet), and more preferably 100~250g / m ² (wet), more preferably 100~150g / m ² (wet).

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.
(Evaluation method)
The adhesive composition and the adhesive wallpaper were evaluated by the following methods.
(1) Evaluation of Wallpaper Adhesive Composition (1) -1, Measurement of Adhesive Strength Adhesive composition and starch-based adhesive obtained in each of the adjustment examples (“Lure Mild (trade name): Yayoi Chemical Industries, Ltd. Gypsum board (GB-) specified in JIS A6901, coated with a roller at a coating amount of 60 g / m ² (wet), 120 g / m ² (wet), and 200 g / m ² (wet). R) Gypsum board (Yoshino Gypsum Co., Ltd., trade name: non-combustible tiger board) and wallpaper 1 and wallpaper 2 obtained in Production Examples 1 and 2 were bonded together, and a Tensilon tensile tester was immediately installed. The value (N / 25 mm) measured according to JIS Z 0237: 2000 was used as the adhesive strength. This peeling was performed at a peeling rate of 5 cm / min and 50 cm / min. The measurement results are shown in Table 1.
(1) -2, Evaluation of ease of reattachment (during operation) 120 g of the adhesive composition and starch-based adhesive (“Lure Mild (trade name) manufactured by Yayoi Chemical Industry Co., Ltd.) obtained in each adjustment example / m on the wall surface at a coverage of ² (wet) and coating with a roller, production examples 1 and picture obtained in 2 1 and wallpaper 2 and gypsum board (Yoshino gypsum Co., Ltd., trade name: noncombustible Tiger board After that, the wallpaper was gently peeled off from the upper corner immediately, and the appearance of the wall surface after peeling was evaluated according to the following criteria.
◯: The surface of the wallpaper was not damaged at all. Δ: Although the surface of the wallpaper was slightly peeled, there was no problem in practical use. ×: The surface of the wallpaper was markedly peeled.
(2) Evaluation of adhesive wallpaper (Evaluation of adhesive strength and ease of reattachment (when reforming))
Adhesive wallpaper obtained in each example and comparative example is bonded to a gypsum board (manufactured by Yoshino Gypsum Co., Ltd., trade name: non-combustible tiger board) based on gypsum board (GB-R) specified in JIS A6901. The value (N / 25 mm) measured according to JIS Z 0237: 2000 using a Tensilon tensile tester after 48 hours was defined as the adhesive strength. This peeling was performed at a peeling rate of 5 cm / min and 50 cm / min. The measurement results are shown in Table 2.
Further, the adhesive wallpaper and the gypsum board were bonded together in the same manner as described above, and the wallpaper was gently peeled off from the upper corner after 48 hours. The state of the wall surface after peeling was evaluated according to the following criteria, and evaluation of ease of reattachment (during remodeling) was made. The evaluation results are shown in Table 2.
◯: The surface of the wallpaper was not damaged at all. Δ: Although the surface of the wallpaper was slightly peeled, there was no problem in practical use. ×: The surface of the wallpaper was markedly peeled.
(3) Construction stability evaluation (finish evaluation)
The adhesive composition and starch-based adhesive obtained in each of the adjustment examples (“Lure Mild (trade name): manufactured by Yayoi Chemical Industry Co., Ltd.”) were roller-coated on the wall surface at a coating amount of 120 g / m ² (wet). The wallpaper 1 and 2 obtained in Production Examples 1 and 2 are pasted on the base of the plaster board (Yoshino Gypsum Co., Ltd., product name: non-combustible tiger board) coated in step 1. It was evaluated with. The evaluation results are shown in Table 1.
○: The wall paper was installed neatly on the wall without any floating. △: Although there was some floating of the wallpaper due to lack of adhesion and adhesive dripping, there was no problem in practical use. Floating and dripping of adhesive occurred and peeling occurred

Production Example 1 (Manufacture of wallpaper 1)
As a base material, a non-woven fabric having a basis weight of 75 g / m ² (manufactured by Ahlstrom, “8241 (product number)”, wax picking: 26) is used. An adhesive resin composition, a foamed resin composition, and a non-foamed resin composition having the following composition were simultaneously formed using an extruder with a T-die, and an adhesive resin layer having a thickness of 10 μm, 100 μm, and 15 μm, respectively. A foamed resin layer and a non-foamed resin layer were formed, and a substrate was laminated on the surface of the adhesive resin layer. The extrusion conditions at this time were such that the adhesive resin layer had a cylinder temperature of 100 ° C., the foamed resin layer had a cylinder temperature of 120 ° C., the non-foamed resin layer had a cylinder temperature of 160 ° C., and the die temperature was 120 ° C. On top of that, a pattern layer was formed by gravure printing with a coating amount of 3 g / m ² using an ink containing an acrylic resin as a binder and carbon black and a stem as a colorant.
Separately from the above, an ethylene-vinyl alcohol copolymer resin (manufactured by Kuraray Co., Ltd., Eval film HF-ME (thickness: 12 μm), ethylene content 44 mol%) is prepared as a film layer. This was used as a surface protective sheet.
Applying the above pattern layer and laminating the adhesive resin composition, the foamed resin composition and the non-adhesive resin layer to the foamed resin composition at a foaming ratio of 5 times at 230 ° C. for 30 seconds using a heating foaming furnace. After obtaining the base material on which the foamed resin layer is formed by foaming, the embossing is performed by passing between the cooling roll and the pressure roll on which the embossing mold is formed simultaneously with the surface protection sheet obtained above. The wallpaper having a concavo-convex pattern on the surface was obtained by thermocompression bonding.

[Adhesive resin composition and non-foamed resin composition]
Ethylene-vinyl acetate copolymer (manufactured by Sumitomo Chemical Co., Ltd., trade name: Smitate CV5053): 100 parts by mass [foamed resin composition composition]
Ethylene-vinyl acetate copolymer (manufactured by Sumitomo Chemical Co., Ltd., trade name: Smitate CV5053): 100 parts by mass Foaming agent (manufactured by Eiwa Kasei, trade name: ADCA # 3): 4 parts by weight Calcium carbonate (manufactured by Shiraishi Kogyo Co., Ltd., Product name: Whiteon H): 30 parts by mass Titanium dioxide (pigment) (manufactured by DuPont, product name: Taipure R-108): 20 parts by mass Light stabilizer (trade name: OF-101): 1 part by mass

Production Example 2 (Manufacture of wallpaper 2)
In Production Example 1, the same procedure as in Production Example 1 was used except that backing paper with a weight of 65 g / m ² (“KK-ANRD (product number)”, wax picking: 12) was used as the base material. Wallpaper 2 was manufactured.

Preparation Examples 1 to 3
Hydroxypropylcellulose (weight average molecular weight: 600,000, hydroxypropoxyl group substitution amount: 67 to 73%), hydroxypropylmethylcellulose (weight average molecular weight: 300,000, hydroxypropoxyl group substitution amount: 4 to 12) using water as a solvent %), And a preservative (pyridine / isothiazoline mixed preservative, “San Aisol 920D (product number)” manufactured by Sanai Oil Co., Ltd.) with a composition shown in Table 1 is prepared. Thus, adhesive compositions 1 to 3 for wallpaper were obtained.

Examples 1 to 4 and Comparative Example 1
Said evaluation was performed about the adhesive compositions 1-3 for wallpaper obtained by the preparation examples 1-3. The evaluation is shown in Table 1.

  In Examples 1 to 4 using the adhesive composition for wallpaper of the present invention, excellent performance was shown in terms of adhesive strength, ease of reattachment (during operation), and coating stability (finish). On the other hand, in the case of Comparative Example 1 using a starch-based adhesive composition, the adhesive strength is equivalent to that of Examples 1 to 4, and the evaluation of ease of reattachment (during operation) is good, but the adhesive composition The object sagged during coating, and the resulting floating of the wallpaper was remarkable, and sufficient performance was not shown in terms of evaluation of coating stability (finished).

Examples 5-7 and Comparative Examples 2 and 3
The wallpaper 1 and 2 obtained in Production Examples 1 and 2 were applied to the wallpaper adhesive compositions 1 to 3 obtained in Preparation Examples 1 to 3, respectively, with application amounts of 60, 120, and 200 g / m ² (wet). It was applied by the bar coating method to obtain an adhesive wallpaper. Said evaluation was performed about the obtained adhesive wallpaper. The evaluation is shown in Table 2.

  In Examples 5 to 7 using the adhesive wallpaper of the present invention, excellent performance was shown in terms of adhesive strength, ease of reattachment (at the time of remodeling), and coating stability (finished). On the other hand, in Comparative Example 2 using the wallpaper with the backing paper of the wax picking 12, although excellent in terms of coating stability (finish), the wallpaper was peeled off 48 hours after the application of the adhesive composition. As a result, delamination occurred in the backing paper, which was not sufficient in terms of ease of reattachment (at the time of reforming). In Comparative Example 3 using a starch-based adhesive composition, wallpaper was peeled off after 48 hours from the application of the adhesive composition, and the gypsum board was damaged and could be easily re-applied. It wasn't. Further, in Comparative Example 3 using the starch-based adhesive composition, the adhesive composition is dripped during coating, and the resulting floating of the wallpaper is remarkable, and the coating stability (finish) is evaluated. In terms of performance, sufficient performance was not shown.

  ADVANTAGE OF THE INVENTION According to this invention, when constructing wallpaper, the adhesive composition for wallpaper has excellent adhesive force, enables stable construction, and can be easily reattached, and a wall surface adhesive layer using the same. The formed adhesive wallpaper can be obtained. The wallpaper adhesive composition of the present invention has an excellent adhesive force for selecting the type of wallpaper, enables stable construction, and enables easy reattachment of wallpaper. The effect is obtained in the application of the adhesive wallpaper. The adhesive composition for wallpaper and the adhesive wallpaper are suitably used as members for building interiors.

1. 1. Adhesive wallpaper Base material 3. Resin layer 31. Adhesive resin layer 32. Foamed resin layer 33. Non-foamed resin layer 4. 4. Wall surface adhesive layer Pattern layer 6. 6. Adhesive layer Film layer 8. Surface protective layer

Claims (13)

It has at least a base material and a wall surface adhesive layer, the base material is a nonwoven fabric having a weight of 50 to 300 g / m ² , and the JAPAN TAPPI paper pulp test method No. 1: value measured by a 2000 A method is not less than 20, the wall surface adhesive layer, seen contains hydroxypropyl cellulose on one side of the substrate, and the content of hydroxypropyl cellulose of the total resin solids in 50 An adhesive wallpaper formed of an adhesive composition for wallpaper having a mass% or more .   The adhesive wallpaper according to claim 1, wherein the wallpaper adhesive composition further comprises hydroxypropylmethylcellulose.   The adhesive wallpaper according to claim 1 or 2, wherein the hydroxypropylcellulose has a weight average molecular weight of 200,000 or more.   The adhesive wallpaper according to any one of claims 1 to 3, wherein the hydroxypropoxyl group substitution amount of hydroxypropylcellulose is 50 to 80% by mass. The adhesive wallpaper according to any one of claims 1 to 4 , wherein the wall surface adhesive layer has a peel strength of 1 to 7 N / 25 mm based on gypsum board (GB-R) defined in JIS A6901. On the surface opposite to the surface on which the wall surface adhesion layer of the base material, foamed resin layers, according to any one of claims 1 to 5 having at least one layer of the resin layer selected from the non-foamed resin layer and a surface protective layer Adhesive wallpaper. The adhesive wallpaper according to claim 6 , wherein the resin layer has a foamed resin layer, and the foamed resin composition forming the foamed resin layer is crosslinked. Adhesive wallpaper according to any of claims 1-7 weighing the substrate is 60 to 160 / m ^2. A non-woven fabric having a weight of 50 to 300 g / m ² and a JAPAN TAPPI paper pulp test method No. 1: the wallpaper or wall value measured by 2000 A method having a substrate 20 or greater, see contains hydroxypropyl cellulose, and the content of hydroxypropyl cellulose of the total resin solid content is at least 50 wt% A method for constructing a wallpaper by applying an adhesive composition for wallpaper and attaching the wallpaper to the wall surface. The wallpaper construction method according to claim 9 , wherein the wallpaper adhesive composition further contains hydroxypropylmethylcellulose. The construction method for wallpaper according to claim 9 or 10 , wherein the hydroxypropylcellulose has a weight average molecular weight of 200,000 or more. The method for constructing wallpaper according to any one of claims 9 to 11 , wherein the hydroxypropoxyl group substitution amount of hydroxypropyl cellulose is 50 to 80% by mass. The wallpaper construction method according to any one of claims 9 to 12 , wherein the wallpaper adhesive composition has a viscosity of 10,000 to 50,000 m · Pa · s.

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