JPH10131097A - Substrate for wallpaper and wallpaper using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a substrate for wallpaper capable of preventing a hydrophobic resin from penetrating into a fiber sheet and a lining material, and excellent in fireproofing properties by laminating the fiber sheet and the lining material by using a solvent-type hydrophobic resin mixed with a fireproofing agent having a large specific gravity. SOLUTION: The objective substrate 5 is obtained by laminating a fiber sheet 1 made of cellulosic fiber or an interlaced nonwoven fabric and having 35-70g/m2 surface density, and a lining material 2 having 80-200g/m<2> surface density by using a solvent-type hydrophobic resin 3 mixed with 25-60 mass % fireproofing agent having a large specific gravity such as aluminum hydroxide. The fiber sheet 1 and/or the lining material 2 preferably includes an antimicrobial agent and/or a mildewproofing agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a wallpaper base material and a wallpaper using the wallpaper base material.

[0002]

2. Description of the Related Art Normally, a wallpaper in which a woven fabric, a nonwoven fabric, a Japanese paper or the like having a decorative layer is laminated on the surface of a backing material is used. In order to construct these wallpapers at the work site, the wallpaper is coated with a water-soluble glue material. However, these woven fabrics, non-woven fabrics, Japanese paper, etc. are breathable, and the applied paste material dries immediately. It was difficult to apply the glue material to the wallpaper before attaching it. In addition, even after the application, the wallpaper quickly dries and immediately adheres to the substrate. Therefore, it is difficult to perform a finishing operation to neatly finish the wallpaper by temporarily applying the wallpaper and then cutting the wallpaper. To solve these problems,
A device that reduces the moisture permeability of the adhesive to suppress the drying of the glue material (Japanese Patent Laid-Open No. 3-19999), or by adding a wax to the adhesive, prevents the penetration of moisture of the glue material,
One that delays drying of glue material (JP-A-5-33300)
Has been published. However, although these techniques are intended to improve construction problems, they require a large amount of an adhesive layer having an amount of an adhesive layer of 40 g / m ² or more to exhibit the effect, and are nonflammable and difficult to use. There was a problem with fire protection such as flammability.

[0003]

The present invention solves the above-mentioned drawbacks, and relates to a wallpaper base material which is excellent in workability and fire prevention performance, and a wallpaper using the wallpaper base material.

[0004]

According to the present invention, a fiber sheet and a backing material are laminated by a solvent-based hydrophobic resin, and the specific gravity of the solvent-based hydrophobic resin is higher than that of the solvent-based hydrophobic resin. The present invention relates to a wallpaper base material in which a flame retardant having a high content is mixed.

[0005]

According to the present invention, since the specific gravity of the flame retardant contained in the solvent-based hydrophobic resin is larger than that of the solvent-based hydrophobic resin,
Since the flame retardant can settle down and form a layer, the penetration of the hydrophobic resin into the fiber sheet or the backing material can be suppressed, and a small amount of the hydrophobic resin is sufficient. it can. Moreover, it can be adhered to the backing material or the fiber sheet without being affected by the flame retardant, and has an adhesive force in the presence of moisture (hereinafter referred to as water-resistant adhesiveness).
Excellent. Since the solvent-based hydrophobic resin can suppress the generation of pinholes, the drying of the paste can be delayed, and the generation of pinholes can be suppressed even in a small amount, which also contributes to fire resistance. In addition, since the air permeability can be suppressed by the flame retardant layer having a large specific gravity, drying of the paste can be suppressed, and the fire resistance can be improved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a fiber sheet and a backing material are laminated with a solvent-based hydrophobic resin, and the specific gravity is larger in the solvent-based hydrophobic resin than in the solvent-based hydrophobic resin. The present invention relates to a wallpaper base material in which a flame retardant is mixed.

[0007] The fiber sheet of the present invention is particularly preferably an entangled nonwoven fabric mainly composed of cellulosic fibers. Since this entangled nonwoven fabric does not use an adhesive and is mainly composed of cellulosic fibers, it generates a small amount of heat and a small amount of smoke, and is excellent in fire prevention performance. The following description is based on an entangled nonwoven fabric mainly composed of cellulosic fibers. Examples of the cellulosic fiber include rayon fiber, polynosic fiber, cupra fiber, acetate fiber and Tencel fiber, and rayon fiber is particularly preferable.

[0008] The entangled nonwoven fabric 1 is made of 50 ma cellulosic fiber.
It is preferably composed of ss% or more, more preferably 70 mass% or more, and most preferably 100 mass%. In addition, as a fiber other than the cellulosic fiber, for example, flame-retardant polyester fiber, modacrylic fiber, and the like can be used.

Further, when the entangled nonwoven fabric is mainly composed of cellulosic fibers having excellent water absorbability, bacteria and fungi easily propagate. However, at the stage of spinning these fibers, an antibacterial agent and / or an antifungal agent is used. Entangled non-woven fabric using mixed fibers, bacteria and fungi do not propagate for a long period of time, it is sanitary, does not impair the aesthetic appearance, furthermore, the entangled non-woven fabric is one side of the backing material,
Or, it is located between the decorative layer and the backing material, and the antibacterial property and / or antifungal property of the entangled nonwoven fabric easily spreads to the backing material and the decorative layer other than the entangled nonwoven fabric. Since the whole can be made to have antibacterial and / or antifungal properties, it can be suitably used.

When the fiber containing the antibacterial agent and / or the fungicide is used, it is preferable that the entangled nonwoven fabric contains 3 to 30% by mass. If it is 3 mass% or more,
It is excellent in antibacterial property and antifungal property, and if it is within 30 mass%, the amount of generated smoke and / or the amount of generated heat is small, and the fireproof performance is excellent. A more preferable mixing amount is 5 to 20 mass%.

Further, even if the fiber is not a fiber mixed with an antibacterial agent and / or an antifungal agent, the antibacterial agent and / or the antifungal agent may be applied or impregnated by a method such as coating or impregnating after spinning the fiber or forming the entangled nonwoven fabric. If the antibacterial property and / or the antifungal property is imparted, the same effect as described above can be obtained.

Examples of the antibacterial and antifungal agents include magnesium compounds such as magnesium oxide and magnesium hydroxide, calcium compounds such as calcium oxide and calcium hydroxide, zinc oxide, zinc hydroxide, zinc sulfate, zinc acetate, chloride, and the like. There is a compound selected from zinc compounds such as zinc, zinc carbonate, zinc nitrate and / or tetrachloroisophthalonitrile.

An entangled nonwoven fabric is produced by entanglement of a fibrous web. The fibrous web is formed from fibers mainly composed of cellulosic fibers, for example, by a dry method such as a wet method, a card method or an air lay method. It is formed. Among them, when the fiber web is formed by the card method, the fibers can be given an orientation, so that the wallpaper 6 may be more easily replaced. For example, if the fiber orientation of the fiber web is unidirectional, it has excellent tensile strength in the fiber orientation direction, so that if the force is applied from this fiber orientation direction, the wallpaper 6 can be easily and neatly peeled off. . In addition, in the case of a fiber web in which the fibers are oriented so that the fibers cross each other by a cross layer or the like, the unidirectional fiber web has excellent tensile strength in multiple directions. The wallpaper 6 can be easily and neatly removed. The unidirectional fiber web and the fiber web oriented so as to intersect may be laminated.

The entangled nonwoven fabric 1 can be obtained by entanglement with the fiber web formed as described above with a fluid stream such as a water stream or a needle. Since the entangled nonwoven fabric 1 does not use any adhesive, the calorific value and the amount of smoke generated during combustion are small. In addition, since the orientation of the fibers of the entangled nonwoven fabric 1 is in the thickness direction of the fibers, not only the touch but also the appearance is flexible. Among them, the entangled nonwoven fabric 1 entangled by the fluid flow can be more preferably used because the fibers are entangled with each other densely and have excellent strength.

In the case where the fiber web is entangled by the fluid flow, for example, a fluid having a plurality of orifices having a diameter of 0.05 to 1.5 mm is jetted at a pressure of 2 to 15 MPa to discharge the fiber web. Processing is preferred. If a net having a pattern is used as a conveyor on which the fiber web is placed, the obtained entangled nonwoven fabric 1 has a pattern corresponding to the pattern of the net, so that a more excellent design can be obtained.

The areal density of the entangled nonwoven fabric 1 thus obtained is preferably 35 g / m ² or more and 70 g / m ² or less, but is preferably 35 g / m ² or more and 60 g / m ² or less. Is more preferred, and most preferably 35 g / m ² or more and 50 g / m ² or less. When the areal density of the entangled nonwoven fabric 1 is 35 g / m ² or more,
The fibers are uniformly entangled, have tensile strength, and are unlikely to be broken when the wallpaper 6 is replaced. On the other hand,
When the areal density is 70 g / m ² or less, the calorific value and the amount of smoke generated during combustion are small, and it is easy to obtain a non-combustible fire retardant.

The substrate 5 for wallpaper of the present invention is formed by laminating an entangled nonwoven fabric 1 and a backing material 2 with a solvent-based hydrophobic resin (including a flame retardant) 3 of 5 g / m ² or more and 20 g / m ² or less. By using this, it is possible to obtain a non-combustible grade wallpaper 6 having a small amount of heat generated during combustion and a small amount of smoke.

The backing material 2 includes, for example, asbestos paper, aluminum hydroxide-containing paper, ceramic paper, glass fiber paper and the like. Among these, aluminum hydroxide-containing paper has non-combustibility, peel strength, smoothness and hardness. Since it has excellent concealing properties and workability, it can be suitably used.
Similar to the constituent fibers of the entangled nonwoven fabric, as the fiber constituting the backing material, a mixture of an antibacterial agent and / or an antifungal agent may be used, or after the fiber is spun or formed, the antibacterial agent may be used. When antibacterial and / or antifungal properties are imparted to the backing material by applying and / or impregnating a fungicide,
Not only the backing material but also the whole wallpaper having antibacterial and / or antifungal properties can be obtained.

The backing material has an area density of 80 to 200 g /
Preferably m ² is used. If the areal density is 80 g / m ² or more, it is excellent in concealing the groundwork during construction, and if the areal density is 200 g / m ² or less, it is excellent in workability during wallpaper construction and workability in manufacturing. Because it is.

As the solvent-based hydrophobic resin, urethane resins and acrylate resins are preferable, and acrylate resins having excellent water resistance, weather resistance and economy are particularly preferable. By using the solvent-based hydrophobic resin, the occurrence of pinholes can be suppressed, and since the moisture of the paste does not easily migrate to the entangled nonwoven fabric or the like, the drying of the paste can be delayed.

The amount of the solvent-based hydrophobic resin (including the flame retardant) is
5-20 g / m < ² > is preferable, and 10-15 g / m < ² > is especially preferable. The base material of the present invention is excellent in fire prevention performance because the amount of resin used is small.

As the flame retardant having a large specific gravity, magnesium hydroxide, guanidine, and aluminum hydroxide are preferable, but aluminum hydroxide, which is excellent in layer forming ability, hardly discolored by heat, and is excellent in economy, is particularly preferable. .

The amount of the flame retardant is the total (solvent-based hydrophobic resin +
(Flame retardant) is preferably 25 to 60 mass%, and 40 to 6 mass%.
0 mass% is more preferable. If the content is less than 25 mass%, the workability and fire protection performance may be poor, and the
If it exceeds ss%, workability and water-resistant adhesiveness may be poor.

By forming the decorative layer 4 on the surface of the entangled non-woven fabric of the base material 5, the entangled non-woven fabric 1 is not broken when the wallpaper 6 is replaced, has excellent workability, and has a fire-retardant performance of a noncombustible grade. Wallpaper 6 is obtained. Due to the pattern and depth of the entangled nonwoven fabric 1, the woven fabric has more excellent design properties.

As the decorative layer 4, for example, a resin paint such as polyvinyl chloride, polyethylene, polypropylene, polyester, polyvinyl acetate, ethylene vinyl acetate copolymer, acrylate ester, polyurethane or the like is applied. A foaming agent may be mixed in advance and foamed after being applied to the entangled nonwoven fabric 1. Further, in addition to the foaming agent, a flame retardant, a water repellent, an antibacterial agent, a fungicide, or the like may be mixed in these resin paints. Furthermore, besides application of resin paint,
A flame-retardant treatment, a water-repellent treatment, an antibacterial treatment or a fungicide treatment may be performed. Among them, foamed and uniform decorative layer 4
Polyvinyl chloride, polyurethane, acrylate, and ethylene-vinyl acetate copolymer excellent in coatability, which are easy to form, can be preferably used.

The decorative layer 4 preferably has an areal density of 5 to 45 g / m ² . When the decorative layer 4 is 5 g / m ² or more, the decorative layer 4 can be formed uniformly over the entire surface of the entangled nonwoven fabric, and the decorative layer 4 is 45 g / m ^2.
If it is the following, the decorative layer 4 does not impair the design property due to the use of the entangled nonwoven fabric 1, and furthermore, the calorific value and the amount of smoke generated during combustion are small, and the flame-resistant grade wallpaper 6 can be obtained. More preferably, it is 10 to 40 g / m ² .

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the examples.

[0028]

【Example】

Example 1 After carding 100% of rayon fibers, a cross-layer was used to obtain a fiber web oriented so that the fibers crossed each other. The fiber web was entangled by jetting a water stream of 10 MPa from a nozzle having an orifice having a diameter of 0.08 mm to obtain an entangled nonwoven fabric 1 having a surface density of 45 g / m ² . On the other hand, the aluminum hydroxide mixed paper of surface density 120 g / m ^2,
15 g / m ² (dry mass) of a composite adhesive obtained by mixing an acrylic acid ester-based solvent-type adhesive (adhesive) with aluminum hydroxide as a cross-linking agent and a flame retardant was coated by a knife coater and dried by an area calender. The composition of the composite adhesive was dry mass%, aluminum hydroxide was 20%, and the adhesive (including a crosslinking agent) was 80%. The aluminum hydroxide paper coated with the composite adhesive and the entangled nonwoven fabric were bonded to each other with a heat laminator to obtain a base material for wallpaper.

Example 2 A base material for wallpaper was prepared in the same manner as in Example 1 except that the composition of the composite adhesive was 35% by weight of aluminum hydroxide and 65% by weight of an adhesive (including a crosslinking agent) in terms of dry mass%. I got

Example 3 A base material for wallpaper was prepared in the same manner as in Example 1 except that the composition of the composite adhesive was 45% by weight of aluminum hydroxide and 55% by weight of an adhesive (including a crosslinking agent) in terms of dry mass%. I got

Example 4 A wallpaper base material was prepared in the same manner as in Example 1, except that the composition of the composite adhesive was 55% by weight of aluminum hydroxide and 45% by weight of an adhesive (including a crosslinking agent) in terms of dry mass%. I got

Example 5 A base material for wallpaper was prepared in the same manner as in Example 1 except that the composition of the composite adhesive was 65% by weight of aluminum hydroxide and 35% by weight of an adhesive (including a cross-linking agent). I got

Example 6 An organophosphorus flame retardant was applied to the entangled nonwoven fabric surface of the wallpaper substrate obtained in Example 3 with a gravure roll at 5 g / m ² (dry mass), and then an acrylic gravure was applied thereon. 4 g / m ^{2 of} ink
(Dry mass) is printed by overlapping two patterns with a gravure roll, and a fluorine-based water repellent (4 g / m ^{2 in} dry mass) is placed thereon.
Is applied and dried to form a decorative layer, and the surface density is 197 g /
to give the wallpaper of m ^2.

COMPARATIVE EXAMPLE 1 A composite adhesive having an organic phosphorus-based flame retardant of 20% and an acrylic ester-based adhesive (including a crosslinking agent) of 80% was 15 g /
A wallpaper substrate was obtained in the same manner as in Example 1 except that m ² (dry mass) was used.

Comparative Example 2 A wallpaper base material was obtained in the same manner as in Comparative Example 1, except that the amount of the composite adhesive was changed to 20 g / m ² (dry mass).

Comparative Example 3 A wallpaper base material was obtained in the same manner as in Comparative Example 1 except that the amount of the composite adhesive was changed to 30 g / m ² (dry mass).

[0037] Comparative Example 4 the surface density 120 vinyl acetate emulsion 15 g / m ² (dry weight) were coated with a kiss roll as the adhesive
g / m ² aluminum hydroxide paper and the entangled nonwoven fabric obtained in the same manner as in Example 1 were bonded together with a laminator and dried using an area calendar to obtain a wallpaper base material.

Comparative Example 5 An aluminum hydroxide paper having an area density of 120 g / m ² coated with kiss roll and coated with 15 g / m ² (dry mass) of a vinyl acetate emulsion mixed with wax as an adhesive was obtained in the same manner as in Example 1. The entangled nonwoven fabric was bonded by a laminator and dried by an area calendar to obtain a wallpaper base material.

Air Permeability and Open Time (Possible Work Time) Performance Test The air permeability and open time (workable time) of Examples 1 to 6 and Comparative Examples 1 to 5 were measured. The air permeability is JI
It measured with the Oken type air permeability tester according to SP-8117. The open time uses a mixture of starch-based paste for wallpaper construction and water in a ratio of 1: 2, which conforms to JIS-A-6922, at a temperature of 25 ° C. and a humidity of 47% in a room.
Amount adhesive is uniformly applied to the backing material so that the 120 g / m ^2, and folio as glue surface on the inside, then peeled off at regular intervals, what the base material together peeled off ○, Those that did not come off were marked with x. The open time is 60
We think that it is usable if it is more than minutes. The results are shown in Table 1.

Fire prevention performance test The base material and wallpaper of Examples 1 to 6 and Comparative Examples 1 to 5 were JIS
-Measured by the method according to the surface test of the flame retardancy test method of the building interior materials and construction method of A-1321. In addition,
In the case of a wallpaper substrate, those having a temperature-time area of 10 or less and a smoke coefficient of 5 or less were accepted, and those of a wallpaper having a temperature-time area of 0 and a smoke coefficient of 30 or less were evaluated as acceptable. Table 2 shows the results.

Water-Resistant Adhesion The substrates of Examples 1 to 6 and Comparative Examples 1 to 5
Sample at 0 mm and immerse in water for 2 minutes. After immersion, excess water is removed and the state when peeled by hand is observed. At this time, the non-woven fabric was broken when the material was broken, and x when the non-woven fabric was peeled off from the bonded portion. Table 3 shows the results.

[0042]

TABLE 1 Table 1 Air Permeability and open time construction uptime permeability 15 min 30 min 60 min 90 min 120 min 150 min 180 min (s /6.4cm ² · 100ml) Example 1 18000 ○ ○ ○ ○ × × × Example 2 21000 ○ ○ ○ ○ ○ × × Example 3 30000 ○ ○ ○ ○ ○ ○ ○ Example 4 31000 ○ ○ ○ ○ ○ ○ ○ Example 5 7000 ○ ○ ○ × × × × Example 6 30000 ○ ○ ○ ○ ○ ○ ○ Comparative Example 1 3000 ○ ○ × × × × × Comparative Example 2 8000 ○ ○ × × × × × Comparative Example 3 9000 ○ ○ × × × × × Comparative Example 4 1000 ○ × × × × × × Comparative Example 5 24000 ○ ○ × × × × ×

[0043]

Table 2 Fire prevention performance Temperature time area Smoke generation coefficient Overall judgment of fire prevention performance Example 1 Base material 10.0 2.0 ○ Example 2 Base material 6.5 3.0 ○ Example 3 Base material 2. 0 3.0 ○ Example 4 base material 1.0 4.0 ○ Example 5 base material 0.0 4.0 ○ Example 6 wallpaper 0.0 18.0 ○ Comparative Example 1 base material 10.0 1. 0 ○ Comparative Example 2 Base 14.0 2.0 × Comparative Example 3 Base 28.0 2.0 × Comparative Example 4 Base 15.0 8.0 × Comparative Example 5 Base 17.0 7.0 ×

[0044]

[Table 3] Table 3 Water-resistant adhesion Example 1 ○ Example 2 ○ Example 3 ○ Example 4 ○ Example 5 × Example 6 ○ Comparative example 1 × Comparative example 2 ○ Comparative example 3 ○ Comparative example 4 ○ Comparative Example 5 ○

[0045]

The solvent-based hydrophobic resin of the present invention can suppress the generation of pinholes, and can delay the drying of the paste. Further, since the generation of pinholes can be suppressed even with a small amount, it contributes to fire prevention. In addition, since the hydrophobic resin does not easily transfer the moisture of the paste to the fiber sheet or the like, the drying of the paste can be delayed. Since the flame retardant has a large specific gravity, it can settle down and form a layer, suppress the penetration of the hydrophobic resin into the fiber sheet or the backing material, and use a small amount of the hydrophobic resin (5 to 20 g / m ² ). And excellent fire prevention performance. In addition, since it can be adhered to the backing material or the fiber sheet without being disturbed by the flame retardant, it is excellent in water-resistant adhesion. In addition, since the layer of the flame retardant having a large specific gravity can suppress the air permeability, it is possible to further suppress the drying of the paste and contribute to the improvement of the fire resistance.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of the wallpaper of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fiber sheet (entangled nonwoven fabric) 2 Backing material 3 Solvent-based hydrophobic resin 4 Decorative layer 5 Wallpaper base material 6 Wallpaper

Claims (10)

[Claims] 1. A fiber sheet and a backing material are laminated with a solvent-based hydrophobic resin.
A base material for wallpaper, wherein a flame retardant having a specific gravity greater than that of the solvent-based hydrophobic resin is mixed. 2. The wallpaper substrate according to claim 1, wherein the fiber sheet is mainly composed of cellulosic fibers. 3. The base material for wallpaper according to claim 1, wherein the fiber sheet is an entangled nonwoven fabric. 4. The wallpaper substrate according to claim 1, wherein the solvent-based hydrophobic resin is a urethane resin and / or an acrylate resin. 5. The solvent-based hydrophobic resin amount (including a flame retardant) is 5 to 20 g / m ^2.
The substrate for wallpaper according to any one of the above. 6. The wallpaper base material according to claim 1, wherein the flame retardant is aluminum hydroxide. 7. The base material for wallpaper according to claim 1, wherein the proportion of the flame retardant is 25 to 60 mass%. 8. The fiber sheet having an areal density of 35 g / m ² or more,
The wallpaper base material according to any one of claims 1 to 7, wherein the base material is 0 g / m ² or less. 9. The fiber sheet and / or backing material has an antibacterial agent and / or an antifungal agent.
8. The substrate for wallpaper according to any one of 8 above. 10. A wallpaper having a decorative layer on the fiber sheet surface of the substrate for wallpaper according to any one of claims 1 to 9.