JPH0985921A - Interior finish ornamental sheet and method of producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it hard to stain or the like and enable removal of stain by using the ornamental sheet as wall paper sheets mainly for wall surfaces or ceilings, especially as wall paper sheets in a smoking section or around a stair. SOLUTION: This ornamental sheet has a base substrate 11 overlaid with a first polyvinyl chloride resin paste layer 12 having irregular pattern formed by an embossing plate and a second polyvinyl chloride paste layer 13 wherein a capsulated foaming agent is dispersed, and these layers clad with a plastic film having anti-staining properties. The ornamental sheet is foamed by heating to make the plastic film surface embossed by foaming.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly used as a wall or ceiling wallpaper, and is used as a wallpaper around a smoking area or stairs, which easily get dirty.
The present invention relates to an interior decorative sheet that easily removes dirt and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a decorative sheet used for interiors, for example, a wallpaper or a ceiling material, as shown in FIG. 2, has a polyvinyl chloride (polyvinyl chloride) on a base material (21) such as a flame-retardant backing paper. Hereinafter, a resin layer (22) and a pattern layer (24) are provided, on which an ethylene-vinyl alcohol copolymer resin (Kuraray, trade name Eval) or a plastic such as polyethylene terephthalate (PET) is provided. The film (23) is adhered by an adhesive or thermocompression bonding, and further, although not shown, it is processed by an embossing plate to give a three-dimensional effect and a design property, and an uneven pattern is formed on the surface of the plastic film. A decorative sheet formed by laminating a plastic film for preventing stains is used.

As another example, as shown in FIG.
A PVC resin layer (32) on a substrate (31) such as backing paper
And a pattern layer (34) such as a wood grain pattern are provided thereon, and embossing with an embossing plate is performed thereon, and the P
There is known an embossed decorative sheet for interior which has an uneven pattern (E) formed on the surface of the VC resin layer (32).

However, in the former decorative sheet laminated with a plastic film for preventing stains, PV
Since the plastic film (23) is laminated on the C resin layer (22), the surface has good stain resistance, but at the time of embossing, a hole is formed in the plastic film due to the shape of the embossing plate, the plate depth, the pressure, etc. Opening or swelling phenomenon (for example, by mixing air due to poor adhesion between the PVC resin layer and the film, evaporating the PVC resin composition, PVC
Caused by the residual solvent of the adhesive that bonds the resin and the film, or even when the organic foaming agent is dispersed in the PVC resin, due to causes such as decomposition of the foaming agent and generation of gas). In the embossing process, the yield may be reduced or the embossing process may be limited. Also,
The pattern layer (34) on the latter PVC resin layer (32) and the decorative sheet with an uneven pattern formed by embossing are
Since the PVC resin layer (32) is exposed on the surface, when stains (particularly oil stains) are attached, there is a problem that the PVC resin layer is soaked and the stains are difficult to remove.

[0005]

As described above, as a decorative sheet for interior use, for example, wallpaper, the uneven pattern on the surface is indispensable from the viewpoint of construction and design, but the decorative sheet by film lamination. Then, when an uneven pattern is formed by embossing with a embossing plate (mechanical embossing), there is a problem that a pinhole-shaped hole opens in the film and contaminants enter through the hole, and
The PVC resin layer has a problem of stain resistance such that oil stains and the like are hard to remove.

Therefore, the present invention has been made in view of the above problems, and an object thereof is a method other than mechanical embossing, that is, a plastic film having stain resistance is applied to the surface, and the surface of the decorative sheet is foamed. An object of the present invention is to provide an interior decorative sheet having an uneven pattern and a method for producing the same.

[0007]

In order to achieve the above-mentioned object in the present invention, in the first invention, a first polyvinyl chloride (on a surface of which a concavo-convex pattern by an embossing plate is provided on a substrate ( A decorative sheet obtained by providing a PVC) resin paste layer and a second polyvinyl chloride (PVC) resin paste layer in which a capsule foaming agent is dispersed, and by adhering a stain-resistant plastic film thereon. Then, the decorative sheet is heated and foamed, and an uneven pattern due to foaming is provided on the plastic film surface.

In a second aspect of the present invention, the plastic film is one of polyvinyl fluoride, polyvinylidene fluoride, ethylene-tetrafluoroethylene, and perfluoroalkyl vinyl ether made of ethylene-vinyl alcohol copolymer resin or fluororesin. It is characterized by comprising a film based on any of the resins.

A third aspect of the invention is characterized in that a pattern layer is provided on the second PVC resin paste layer.

Further, a fourth invention is that a first polyvinyl chloride (PVC) resin paste is coated on a substrate made of a flame-retardant backing paper or the like, and an uneven pattern by an embossing plate is formed on the paste layer. After the formation, a second polyvinyl chloride (PVC) resin paste in which a capsule foaming agent is dispersed is applied thereon, a pattern layer is applied on the second PVC resin paste, and ethylene- A decorative sheet obtained by sticking a plastic film made of a vinyl alcohol copolymer resin or a fluororesin, wherein the decorative sheet is heated and foamed to form an uneven pattern due to foaming on the plastic film surface. A method for producing a decorative sheet for interior, which is characterized by the above.

In the wallpaper, which is mainly used for decorative sheets for interiors, the uneven pattern on the surface is indispensable for the construction surface and the design surface. However, in the conventional embossing with the embossing plate, the plastic film on the surface has pinhole-shaped holes. The dirt will not be removed due to contaminants entering through the holes. Therefore, the present invention forms an uneven pattern on the film surface by a method other than mechanical embossing.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION That is, as shown in FIG. 1, a first PVC resin paste layer (12) having an embossed plate-shaped relief pattern and a capsule foaming agent are dispersed on a substrate (11). A second PVC resin paste layer (13), and an appropriate pattern layer (14) on the second PVC resin paste layer (13), and an ethylene-vinyl alcohol copolymer resin (Kuraray, trade name Eval) or a fluorine resin. A plastic sheet (15) is laminated to form a decorative sheet, and the decorative sheet is heated to foam the foaming agent in the paste layer, and an uneven pattern due to foaming is formed on the plastic film surface. is there.

The base material (11) may be a flame-retardant backing paper, inorganic paper, cloth, glass fiber, or the like, which can be easily adhered to the wall or ceiling by an adhesive which is usually used during construction. For example, without limitation.

As the foaming agent to be dispersed in the second PVC resin paste used in the present invention, if a commonly used organic foaming agent such as ADCA type or DBSH type is used, it is decomposed by heat and decomposed into N. _Since a CO ₂ gas is generated and a “blister phenomenon” may occur between the surface plastic film (15) and the second PVC resin paste layer (13), a capsule foaming agent was used. As the capsule foaming agent, a shell made of a copolymer of vinylidene chloride and acrylonitrile and a volatile substance such as liquid isobutane as an expander and microcapsules in a spherical shape are used. As the volatile substance is vaporized, it expands to form a microballoon, so that no gas is generated and the blistering phenomenon can be prevented.

According to the present invention, a first PVC resin paste is applied onto a substrate made of a flame-retardant backing paper or the like, an embossing pattern is formed on the paste layer by embossing, and then a capsule foam is formed thereon. A second PVC resin paste in which the agent is dispersed is applied, and a decorative sheet obtained by sticking a plastic film made of an ethylene-vinyl alcohol copolymer resin or a fluororesin on the second PVC resin paste is heated and foamed. The first PVC resin paste layer (1) is formed by forming a concavo-convex pattern on the surface of the plastic film according to the amount of foaming, that is, in order to impart the size of foaming ratio.
2) is mechanically embossed, and a second PVC resin paste layer (13) in which a capsule foaming agent is dispersed is applied on the emboss, and unevenness is provided depending on the coating amount. Therefore, the coating amount of the paste layer (13) is partially different in thickness, and heating causes unevenness corresponding to the coating amount. That is, the place where the paste layer (13) is large (the concave portion of the first paste layer (12)) is convex, and the place where the paste layer (13) is small (the convex portion of the first paste layer (12)) is concave,
As a result, unevenness with a smoother gradation than that of ordinary mechanical embossing can be obtained.

On the second PVC resin paste layer,
A pattern layer (14) such as a grain pattern, a pattern, or an abstract pattern can be provided by printing or the like. Further, the pattern layer is not limited to being on the PVC resin paste layer (13), and the pattern layer may be formed in advance on the inner surface side of the plastic film (15) attached thereon. When printing a design or the like on this plastic film, it is necessary that the printing ink used is an ink with good adhesiveness to the plastic film (especially when a fluorine-based resin film is used).

Further, the second PVC resin paste layer (1
The plastic film to be attached to 3) is a thermoplastic resin film of ethylene-vinyl alcohol copolymer resin, or a film based on a fluororesin such as polyvinyl fluoride, polyvinylidene fluoride, ethylene-tetrafluoroethylene, Perfluoroalkyl vinyl ether or the like can be used. However, the film of ethylene-vinyl alcohol copolymer has a unit price lower than that of the fluororesin film, the gloss of the film is matte on the whole, and the workability is good. Contamination is lower than that of fluororesin film. In particular, in order to remove stains such as curry powder, oil-based ink and shoe ink, which have a strong dyeing power, a solvent having a dissolving power such as alcohol or petroleum benzene is required. On the other hand, the fluorine-based resin film is optimal because it has excellent stain resistance, solvent resistance and the like. That is, the above-mentioned film does not easily get dirty, but even if dirt due to oil-based ink, cigarette tar, etc. adheres, it can be easily removed with a dry cloth, a water cloth, or a detergent solution.

[0018]

The decorative sheet of the present invention comprises a first PVC resin paste layer provided with an embossed pattern on a base material, and a first PVC resin paste layer.
A second PVC resin paste in which a capsule foaming agent is dispersed is applied onto this, and a film based on a fluorine-based resin having stain resistance is attached onto the second PVC resin paste. When the dispersed second PVC resin paste is applied, the convex surface of the first paste layer is thinly coated with the second PVC paste in which the capsule foaming agent is dispersed, and the concave surface is thickly coated. Therefore, since the amount of foaming on the convex surface is small and the amount of foaming on the concave surface is large by heating, a smooth gradation uneven pattern due to the difference in the amount of foaming is formed on the surface of the plastic film attached to the surface. be able to.

[0019]

EXAMPLES Specific examples of the present invention will be described.

<Example 1> A flame-retardant backing paper having a basis weight of 75 g / m ² was used as a base material, and a knife coater was used to make a first coating on the backing paper.
The PVC resin paste of was applied to a thickness of 130 g / m ² (dry, separate for paper). A formulation example is shown below. First PVC resin paste formulation example PVC resin (Tosoh Corp., # 205) 100 parts Plasticizer (DOP) 80 parts Stabilizer (Kyodo Pharmaceutical Co., Ltd. KR-69A-10) 3 parts Calcium carbonate (Cassie Industry Co., Ltd., BF-200S) 100 parts Titanium oxide (Sumitomo Color Co., Ltd., TiO ₂ ) 20 parts Diluent (Exxon Chemical Co., Ltd., D-40) Proper amount This paste layer Is heated at 180 to 200 ° C. for about 30 to 60 seconds, and then embossing is performed using an embossing plate having a plate depth of 100 to 1500 μm to form an uneven pattern.
A second pattern is formed on the uneven pattern of the first PVC resin paste layer.
PVC resin paste with a thickness of 130 g / m ² (dry,
It was applied to a different paper, heated at 150 ° C. for about 30 seconds to be in a semi-cured state, and a pattern layer was applied to this surface by an arbitrary method. A formulation example is shown below. Second PVC resin paste formulation example PVC resin (Tosoh Corp., # 205) 100 parts Plasticizer (DOP) 55 parts Stabilizer (Kyodo Pharmaceutical Co., Ltd. KR-69A-10) 3 parts Calcium carbonate (Casey Industry Co., Ltd., BF-200S) 80 parts Titanium oxide (Sumitomo Color Co., Ltd., TiO ₂ ) 18 parts Capsule foaming agent (Matsumoto Yushi-Seiyaku Co., Ltd., F-85D) 10 parts Diluent (manufactured by Exxon Chemical Co., Ltd., D-40) Appropriate amount 60 mesh on one side of the ethylene-tetrafluoroethylene film based on the fluororesin on the picture layer of the second PVC resin paste layer. An adhesive (manufactured by Sony Chemicals Co., Ltd., 90A14) was applied with a gravure roll, and then laminated while being dried. After pasting,
By heating at 170 ° C. for 40 seconds to foam the second PVC resin paste layer, an interior decorative sheet having a smooth gradation uneven pattern due to foaming on the surface was obtained.

Example 2 Although not shown, the basis weight is 70 g.
/ M ² flame-retardant backing paper as a base material, and the second PVC resin paste used in Example 1 was coated thereon with a knife coater to 100 g / m ² (dry, separate paper) (compounding example: See Example 1). After heating the paste layer in the same manner as in Example 1, embossing was performed using an embossing plate having a plate depth of 100 to 1500 μm to form an uneven pattern. On top of this, add the above resin paste to 130 g / m ² (dry,
(Paper different) and a pattern layer was applied to this surface in the same manner as in Example 1. After that, EVAL film (Kuraray, trade name EVAL) is laminated by the heat lamination method,
The second PVC resin paste layer was foamed by heating at 170 ° C. for about 40 seconds to obtain a decorative sheet having a smooth uneven pattern on the entire surface.

<Comparison Evaluation> The obtained decorative sheet for interior 2
The seed and a conventional general PVC wallpaper were compared and evaluated. The results are shown in Table 1.

[0023]

[Table 1]

[0024]

The decorative sheet by the film laminate of the present invention has a surface strength higher than that of a general interior decorative sheet when a film based on a fluororesin is used as a plastic film attached to the surface. Is significantly improved, and the interior decorative sheet has excellent stain resistance and solvent resistance. Moreover, since the unevenness pattern formed by the capsule foaming agent is different in how unevenness is formed by mechanical embossing, there is no concern about perforation of the laminated film. Moreover, since no ADCA-based foaming agent is used,
"Blistering phenomenon" does not occur during manufacturing. further,
The concavo-convex pattern formed by the capsule foaming agent forms a natural concavo-convex pattern depending on the amount of foaming of the capsule foaming agent, and it has two stages: shallow and deep, like the concavo-convex pattern formed by mechanical embossing. It is possible to obtain an interior decorative sheet having a smooth gradation and not an uneven surface and having an excellent design property such as a natural feeling.

[Brief description of drawings]

FIG. 1 shows an example of an interior decorative sheet of the present invention, (a) is a cross-sectional view showing a laminated structure of a decorative sheet, and (b) heats and foams this sheet to form an uneven pattern on the surface. It is sectional drawing which added.

FIG. 2 is a cross-sectional view showing an example of a conventional decorative sheet.

FIG. 3 is a cross-sectional view showing an example of a conventional embossed decorative sheet.

[Explanation of symbols]

 11, 21 ... Base material 12 ... First PVC resin paste 13 ... Second PVC resin paste 14, 24, 34 ... Picture layer 15 ... Contamination-resistant plastic film 22, 32 ... PVC resin paste 23 ... Plastic film E ... uneven pattern

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B32B 27/30 B32B 27/30 D 101 101 E04F 13/00 8913-2E E04F 13/00 B 13 / 18 8913-2E 13/18 A

Claims (4)

[Claims] 1. A first polyvinyl chloride resin paste layer having an uneven pattern formed by an embossing plate on the surface and a second polyvinyl chloride resin paste layer having a capsule foaming agent dispersed therein are provided on a substrate. A decorative sheet having a stain-resistant plastic film adhered onto the decorative sheet, the decorative sheet being heated for foaming, and the plastic film surface provided with an uneven pattern due to foaming. Cosmetic sheet. 2. The plastic film is ethylene-
A vinyl alcohol copolymer resin or a fluorine-based resin made of polyvinyl fluoride, polyvinylidene fluoride, ethylene-tetrafluoroethylene, perfluoroalkyl vinyl ether, which is a resin-based film. Item 1. The decorative sheet for interior use according to Item 1. 3. A pattern layer is provided on the second polyvinyl chloride resin paste layer.
The decorative sheet for interior as described in. 4. A first substrate is formed on a substrate made of flame-retardant backing paper or the like.
Of polyvinyl chloride resin paste is applied to form an uneven pattern by an embossing plate on the paste layer, and then a second polyvinyl chloride resin paste having a capsule foaming agent dispersed therein is applied, A decorative sheet obtained by applying a pattern layer on the second paste, and further adhering a plastic film made of an ethylene-vinyl alcohol copolymer resin or a fluorine-based resin on the decorative layer, which is heated and foamed. A method for producing a decorative sheet for interior, wherein the surface of the plastic film is provided with an uneven pattern due to foaming.