JP5233414B2 - Interior decorative material - Google Patents

Description

  The present invention relates to an interior decorative material.

  Conventionally, on walls of houses, commercial facilities, hospitals, nursing homes, etc., on non-flammable boards such as plasterboard, wallpaper, polyester decorative board, wood powder blended PVC, or plywood, particle board, medium density fiber What applied the decorative material which stuck the decorative sheet on the woody base materials, such as a board (MDF), is used. In recent years, as consumer demands have become more severe and diversified, in addition to conventionally required characteristics such as workability and scratch resistance, impact resistance has been demanded. For example, wheelchairs, stretchers for transporting patients, carriers for meals, etc. are used in homes, hospitals, and nursing homes where home care is provided. Damage to the base material such as gypsum board in the lower layer was a problem. Many cosmetic materials excellent in workability, scratch resistance, etc. have been developed so far (see, for example, Patent Document 1), but cosmetic materials used for interiors such as wall surfaces with excellent impact resistance have been developed. The current situation is not enough, and the development of interior decoration materials with excellent impact resistance is desired.

  By the way, with the increase in the demand in the above-mentioned uses, the use conditions are diversified, so that it is expected to be used in a severer environment than before. In particular, in an environment of high temperature and humidity, warping of the interior decorative material is likely to occur, and peeling of the base material and the interior decorative material due to the warpage may cause a problem of poor appearance due to the peeling.

JP 2001-260109 A

  An object of the present invention is to provide an interior decorative material that is excellent in impact resistance under such circumstances and can suppress the occurrence of warpage even under high-temperature and high-humidity conditions.

  As a result of intensive studies to achieve the above object, the present inventors have excellent impact resistance by suppressing the occurrence of warpage even under high temperature and high humidity conditions by sandwiching the foamed board between the wood fiber boards. Interior decoration material that can be obtained.

That is, the present invention
(1) Waist wall with a thickness of 10 mm or less , sandwiched between 1.0 to 5.5 mm thick thermoplastic resin foam board with wood fiber board made of 1.5 to 3 mm thick MDF (medium density fiber board) It is an interior decorative material used for the above, and is formed by laminating a decorative sheet comprising a surface protective layer formed by crosslinking and curing an ionizing radiation curable resin composition on the wood fiberboard which is a surface side during interior decoration. And the interior decorative material for the waist wall , wherein the thermoplastic resin foam plate has a breaking elongation property of 3 to 20 % in one direction,
Is to provide.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in impact resistance, generation | occurrence | production of curvature is suppressed also in the condition of high temperature and humidity, and it can provide the interior decoration material used suitably especially for a waist wall.

  FIG. 1 is a schematic view showing a cross section of an example of a preferred embodiment of the interior decorative material 1 of the present invention. In the example shown in FIG. 1, the interior decorative material 1 of the present invention has a configuration in which a thermoplastic resin foam board 2 is sandwiched between wood fiber boards 41 and 42, specifically, a wood fiber board 41. The thermoplastic resin foam board 2, the wood fiber board 42, and the decorative sheet 5 are sequentially laminated through an adhesive layer. FIG. 2 is a schematic view showing a cross section of an example of use of the interior decorative material 1 of the present invention. The interior decorative material 1 of the present invention is used by being attached to a gypsum board or the like serving as a base material 6.

[Thermoplastic resin foam board]
Hereinafter, the present invention will be described in detail with reference to FIG. 1 showing one preferred embodiment of the present invention.
The thermoplastic resin foam plate 2 according to the present invention can be used without particular limitation as long as it is foamable and is made of a thermoplastic resin having cushioning properties, but breaks 3-30% in one direction. It preferably has an elongation characteristic, and more preferably has a breaking elongation characteristic of 3 to 20%. If the elongation at break property is within this range, the thermoplastic resin foam board 2 sufficiently follows the expansion due to humidity and the shrinkage due to the low temperature of the wood fiberboard and the gypsum board as the base material. It is preferable in terms of impact resistance because it can prevent cracking and breakage of the material and has cushioning properties.
Examples of the thermoplastic resin foam plate include foam plates made of various synthetic resins such as polystyrene foam, polyethylene foam, polypropylene foam, rigid polyurethane foam, phenol foam, and vinyl chloride foam. Can be preferably mentioned. Among these, an extruded foamed polystyrene plate using a polystyrene-based foam and an extruded foamed polypropylene plate using a polypropylene-based foam are preferable from the viewpoints of environment and cost.

  1.0-7.5 mm is preferable and, as for the thickness of the thermoplastic resin foam board 2, 2.5-5.5 mm is more preferable. If it exists in this range, sufficient impact resistance can be acquired and the accommodation at the time of construction will also become favorable. Moreover, although the expansion ratio of the thermoplastic resin foam board 2 is suitably selected according to the material and thickness, it is usually 3 to 20 times, and preferably 5 to 20 times.

[Wood fiberboard]
The wood fiberboards 41 and 42 according to the present invention can be used without particular limitation as long as they are fiberboards defined in JIS A5905-2003. The wood fiberboard defined in this way is a board mainly made of plant fibers such as wood, and generally has a high surface hardness, and if an appropriate density is selected, it is a dent when an object collides. It is a strong and useful material. In addition, the cost of the material can be obtained at a lower cost than plastic.
Among such wood fiberboards, MDF (medium density fiberboard) having a density in the range of 0.35 to 0.80 g / cm ² is relatively inexpensive and has good surface properties. It is preferable because it can be laminated smoothly and has good machinability when it is cut into a fixed size for construction. The wood fiber plates 41 and 42 may be made of the same material or different from each other, but are preferably the same from the viewpoint of reducing warpage.

  The thicknesses of the wood fiber boards 41 and 42 are not particularly limited, but are preferably 1 to 5 mm, more preferably 1.5 to 5 mm, from the viewpoints of production restrictions and weight of the wood fiber board. 5 to 3 mm is more preferable. When only a wood-based fiberboard is used as the interior decorative material, a thickness of 10 mm or more is required to obtain sufficient impact resistance, resulting in a heavy product and an expensive material. However, by combining the wood fiberboard with the thermoplastic resin foam plate, even if the wood fiberboard has the above thickness, sufficient impact resistance can be ensured, and the cost of the material can be suppressed. Is possible. The thicknesses of the wood fiber plates 41 and 42 may be the same or different, but are preferably the same from the viewpoint of reducing warpage.

[Adhesive layer]
In the interior decorative material 1 of the present invention, between the wood fiber board 41 and the thermoplastic resin foam board 2, between the thermoplastic resin foam board 2 and the wood fiber board 42, and between the wood fiber board 42 and the decorative sheet. 5 are respectively provided with adhesive layers 31-33.
Adhesives used for the adhesive layers 31-33 include (meth) acrylic resins, polyurethane resins, epoxy resins, polyester resins, polyamide resins, (meth) acrylic ester-olefin copolymer resins. , Vinyl chloride-vinyl acetate copolymer resins, ethylene-vinyl acetate copolymer resins, ionomer resins, olefin-α olefin copolymer resins, etc. Alternatively, a plurality of them can be used in combination. Of these, polyurethane resins are preferred because of good initial and long-term adhesion. Here, “(meth) acrylate” means “acrylate or methacrylate”.

  The thickness of the adhesive layer 31-33 may be an appropriate thickness depending on the required physical properties and the like, but is usually about 1 to 100 μm. The method for forming the adhesive layer is not particularly limited, but usually, known printing or coating means such as gravure printing, roll coating, etc. as an ink or coating liquid comprising a resin liquid obtained by diluting the above resin with a diluent solvent. To form. Further, in the adhesive layer, for the purpose of adjusting and improving various physical properties such as printing (or coating) suitability of the ink (or coating liquid), other auxiliary materials, for example, Various additives such as extender pigments may be added.

In addition, when the thermoplastic resin foam plate 2 is made of a nonpolar resin such as a polypropylene resin, an oxidation method or unevenness may be applied to one or both surfaces of the thermoplastic resin foam plate 2 as desired in order to further improve the interlayer adhesion. A physical or chemical surface treatment such as a chemical conversion method and a primer layer can be applied.
Examples of the oxidation method include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone / ultraviolet treatment method, and examples of the unevenness method include a sand blast method and a solvent treatment method. These surface treatments are appropriately selected depending on the type of substrate, but generally, a corona discharge treatment method is preferably used from the viewpoints of effects and operability.
The primer layer usually has a thickness of 1 to 10 μm, and preferred examples of the resin forming the primer layer include (meth) acrylic resins, polyurethane resins, urethane-acrylic resins, and the like.

[Decorative sheet]
The interior decorative material 1 of the present invention can further laminate a decorative sheet 5 on a wood fiberboard for the purpose of imparting design properties. As a decorative sheet, it can be used without particular limitation as long as it can provide design properties. However, in order to further impart abrasion resistance, scratch resistance, stain resistance, etc. to the interior decorative material 1 of the present invention, an overcoat layer is used. It is preferable to use a decorative sheet having As such a decorative sheet, for example, a coated sheet made of urethane resin or acrylic resin, a decorative sheet provided with a surface protective layer formed by crosslinking and curing an ionizing radiation curable resin composition, and the like can be preferably exemplified. However, a decorative sheet having a surface protective layer formed by crosslinking and curing the ionizing radiation curable resin composition is particularly preferable. As a decorative sheet having a surface protective layer formed by crosslinking and curing such an ionizing radiation curable resin composition, for example, “WS Safmare” (trade name, manufactured by Dai Nippon Printing Co., Ltd.) can be exemplified.

[Interior cosmetics]
The interior decorative material of the present invention is not particularly limited, but is preferably used for applications that require impact resistance. Preferable uses include, for example, interior building materials such as doors, wall boards, floor boards, waist walls, curbs, shelves, door pockets, and furniture uses such as desks and bags. Especially, the interior decoration material of this invention is useful as a waist wall use used for wall surfaces, such as a house, a commercial facility, a hospital, and a nursing care facility. The thickness of the interior decorative material for the waist wall is preferably equal to or less than the protruding width of the door frame from the wall surface. When the width is not more than the protrusion width, impact resistance and warpage are less likely to occur, and the interior decorative material has a good fit and can be finished into a beautiful wall. Generally, the width of the door frame protruding from the wall surface is about 10 mm, and therefore the thickness of the interior decorative material for specific waist wall use is preferably 10 mm or less, more preferably 7 mm or less. In addition, the interior decorative material of the present invention is less likely to be warped in a hot and humid environment as well as in a normal environment. Can be used.
When used as a waist wall, as shown in FIG. 2, the interior decorative material 1 of the present invention includes a plaster board such as a gypsum board and a gypsum slag board, a calcium silicate board, an asbestos slate board, a lightweight foamed concrete board, a hollow It is used by adhering to a base material 6 such as a cement board such as an extruded cement board, a fiber cement board such as a pulp cement board, an asbestos cement board and a wood chip cement board via an adhesive layer 34. As the adhesive used for the adhesive layer 34, a commonly used adhesive can be used without limitation.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.
(Evaluation and measurement method)
The decorative interior materials obtained in each Example and the materials used in each Example were evaluated and measured by the following methods.
(1) Measurement of elongation at break The elongation at break of the thermoplastic resin foam plate used in each example was measured according to JIS K7127-1999.
(2) Evaluation of warpage The interior decorative material produced in each example and comparative example was cut into 90 cm × 180 cm, left in a 60 ° C. and 10% environment for one week, and then in a 50 ° C. and 90% environment. Left for a week. The warpage of the 180 cm side of this interior decorative material was measured.
○ Less than 4mm △ 4mm or more and less than 10mm × 10mm or more (3) Impact resistance evaluation (interior decorative material surface)
A test piece impact test was carried out on the test pieces obtained by sticking the interior decorative material produced in each Example and Comparative Example to a gypsum board as a base material according to JIS K7211-1976. An eggplant type weight (an eggplant type 1) was dropped onto an interior decorative material from a height of 75 cm and 1 m, and the surface of the interior decorative material was visually observed and evaluated according to the following criteria.
○ There was no change in the surface. △ Some dents were formed on the surface, but there was no problem in practical use. × Remarkable dents were generated on the surface. (4) Impact resistance evaluation (base material)
The falling weight impact test was performed, and the appearance of the gypsum board as the base material of the interior decorative material was visually observed and evaluated according to the following criteria.
○ There were no cracks. △ Some cracks occurred, but there was no problem in practical use.

Example 1
As the thermoplastic resin foam plate 2, a polystyrene resin foam board (manufactured by Happo Chemical Industries, Ltd., thickness: 5.0 mm, expansion ratio 15 times) is used as the wood fiber boards 41 and 42, and medium density fiber boards (commodities). Name: NP Wood, manufactured by Sumitomo Forestry Co., Ltd., thickness: 2.5 mm), 2 sheets (hereinafter referred to as MDF41 and MDF42), and olefin sheet as a decorative sheet 5 (trade name: WS Safmare, Dai Nippon Printing Co., Ltd.) Manufactured, thickness: 0.14 mm). An adhesive mainly composed of a polyurethane resin was applied to the MDF 42 at a thickness of 10 μm / dry, and an olefin sheet was adhered. Next, the same adhesive as described above is applied at a thickness of 10 μm / dry on the surface of the MDF 42 where the olefin sheet is not adhered and one surface of the MDF 41, and the polystyrene resin foam plate is sandwiched between them. The interior decorative material of the present invention was obtained. The obtained interior decorative material was stuck on a gypsum board (trade name: Tiger Board, Yoshino Gypsum Co., Ltd., thickness: 12.5 mm) to obtain a test piece.

Comparative Example 1
In Example 1, an interior decorative material and a test piece were obtained in the same manner as in Example 1 except that the thermoplastic resin foam plate and the MDF 41 were not used and the thickness of the MDF 42 was 9 mm.

Comparative Example 2
Wallpaper (made by Toli Co., Ltd., thickness: 1 mm) was stuck on a gypsum board (trade name: Tiger Board, Yoshino Gypsum Co., Ltd., thickness: 12.5 mm) to obtain a test piece. The warpage was evaluated using wallpaper.

Comparative Example 3
A polyester decorative board (manufactured by Aika Kogyo Co., Ltd., thickness: 2.5 mm) was attached to a gypsum board (trade name: Tiger Board, Yoshino Gypsum Co., Ltd., thickness: 12.5 mm) to obtain a test piece. The warpage was evaluated using a polyester decorative board.

Comparative Example 4
A wood powder blended PVC sheet (thickness: 2.5 mm) was adhered to a gypsum board (trade name: Tiger Board, Yoshino Gypsum Co., Ltd., thickness: 12.5 mm) to obtain a test piece. In addition, evaluation of curvature was performed with the wood powder combination PVC sheet.

Reference example 1
In Example 1, the interior decorative material and the test piece were obtained in the same manner as in Example 1 except that the thermoplastic resin foam plate and the MDF 41 were not used and the thickness of the MDF 42 was set to 12 mm.

Table 1 shows the results of the above evaluation for Example 1, Comparative Examples 1 to 4, and Reference Example 1.
In Example 1, high performance was shown in all points. Moreover, in Comparative Examples 1-4, although evaluation of curvature was favorable, it was inadequate at the point of the surface dent and the crack of a gypsum board. Reference Example 1 is an example in which the thermoplastic fiber foam board is not used and the wood fiber board is thickened, and the impact resistance is sufficiently evaluated. However, the thickness of the wood fiber board is required to be 12 mm. It was heavy and was not sufficient for practical use.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in impact resistance, generation | occurrence | production of curvature is suppressed also in the conditions of high temperature and humidity, and the interior decoration material used suitably especially for a waist wall can be obtained.

It is a schematic diagram which shows the cross section of the interior decorative material of this invention. It is a schematic diagram which shows the cross section of the usage example of the interior decorative material of this invention.

Explanation of symbols

1. Interior decorative material 2. Thermoplastic resin foam board 31. Adhesive layer 32. Adhesive layer 33. Adhesive layer 34. Adhesive layer 41. Wooden fiberboard 42. 4. Wooden fiberboard Decorative sheet Base material

Claims (1)

A thermoplastic resin foam board having a thickness of 1.0 to 5.5 mm is used for a waist wall having a thickness of 10 mm or less sandwiched between wood fiber boards made of 1.5 to 3 mm thick MDF (medium density fiber board). Interior decoration material,
A laminate of a decorative sheet provided with a surface protective layer formed by crosslinking and curing an ionizing radiation curable resin composition on the wood-based fiberboard that becomes the surface side during interior decoration, and the thermoplastic resin foam board An interior decorative material for a waist wall having a breaking elongation property of 3 to 20 % in one direction.

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