JP4792809B2 - Floor decorative material - Google Patents

Description

  The present invention relates to a decorative material for floors used in houses, stores, offices, gymnasiums and the like. More specifically, the present invention relates to a floor decorative material excellent in impact resistance, caster resistance, and productivity.

  A board-like decorative material for floors made of a wood-based base material is known in which a veneer is attached to a plywood, grooved with a woodworking machine, the groove is colored, and an ultraviolet curable paint is applied and cured. It has been. However, because the veneer is a natural wood, the colors vary and it is difficult to harmonize the color with the walls, ceiling, and furniture.

  In addition, a concave groove is provided on the surface of the wood base material, and a colored pipe resin synthetic resin paint is applied to the concave groove, and after removing paint other than the concave groove, a wood grain conduit concave portion is formed, and the woody system other than the concave groove A method of applying a transparent synthetic resin paint to the substrate surface is known. However, because of the construction consisting of a wood-based substrate and a synthetic resin paint, it is difficult to achieve so-called caster resistance against scratches by chairs with casters, and so-called sugarlet resistance against dirt when tobacco falls on the floor. (Patent Document 1).

Further, a flooring decorative material in which a thermoplastic resin decorative sheet is laminated on a woody base material is also known. However, if the thermoplastic resin decorative sheet is too thick, it will be difficult to wind in a wave shape (rolled state), and sheet cutting will be difficult on the line during continuous lamination with a woody base material. Therefore, since productivity does not increase, when laminating a thermoplastic resin decorative sheet and a wooden base material, prepare a thermoplastic resin decorative sheet that has been cut in the same size as the wooden base material in advance. A method such as laminating one by one using the leaf method had to be taken (Patent Document 2).
JP 52-76409 A JP 2004-17590 A

  The present invention has been made to solve the above-mentioned problems, and the problem is that the color tone can be easily adjusted, and the caster resistance, cigarette resistance, and impact resistance are excellent. An object of the present invention is to provide a floor covering material that can be manufactured easily and has excellent processability.

The invention according to claim 1 of the present invention is a floor decorative material obtained by laminating a thermoplastic resin decorative sheet on a wooden base material, and has a thickness between the wooden base material and the thermoplastic resin decorative sheet. A metal intermediate layer of stainless steel foil (SUS304) of 50 μm austenitic 18Cr-8Ni is provided, and the dent after a DuPont impact drop test (JIS K5400-1990) of a flooring decorative material is 0.7 mm or less. It is a decorative material for floors.

  According to the first aspect of the present invention, it is possible to provide a flooring decorative material that can be laminated in a laminator system with a wooden base material and is excellent in castor resistance, impact resistance, and sugaret resistance. Moreover, when providing a plate-shaped uneven | corrugated pattern, the plate-like emboss which a metal intermediate | middle layer permanently deform | transforms can be provided with an embossing plate etc., or a groove pattern can also be provided to a thermoplastic resin decorative sheet. In addition to the moisture-curing hot melt adhesive as the adhesive when laminating, if the thermoplastic hot melt resin adhesive is used, the metal intermediate layer and the thermoplastic resin decorative sheet can be formed by simply applying heat when discarded. It can be separated into a woody base material.

  FIG. 1 shows a cross-sectional structure of an embodiment of the floor decorative material of the present invention. A metal intermediate layer 3 is provided on a wooden substrate 1 with an adhesive layer 2 interposed therebetween, and a thermoplastic resin decorative sheet 4 is provided. Furthermore, a surface protective layer 5, a transparent thermoplastic resin layer 6, a U-shaped groove 10, and a V-shaped groove 11 may be provided as appropriate.

  As the woody base material 1, south plywood plywood, particle board, medium density fiber board (hereinafter MDF), or normal plywood stipulated in Japanese Agricultural Standard can be used. Moreover, the woody base material which consists of wood powder addition olefin resin can also be used. The thickness is preferably about 3 to 25 mm.

As the adhesive layer 2, a known two-component urethane-modified vinyl resin aqueous adhesive, one-component vinyl acetate resin emulsion-based adhesive, moisture-curing urethane resin-based hot melt adhesive, or the like can be used. A thermoplastic resin hot melt adhesive can also be used. As for the application amount of the adhesive layer 2, the weight after drying is preferably about 3 to ²⁰ g / m ² from the viewpoint of adhesiveness.

  The metal intermediate layer 3 is made of a material and a thickness such that a dent after a DuPont impact drop test (JIS K5400-1990) of the laminated flooring material is 0.7 mm or less. The DuPont impact drop test (JIS K5400-1990) is originally a method for evaluating a coating film, but the present inventors can measure the amount of dents in a flooring material by using this method. I found out that it was possible to limit. The thickness only needs to be thick enough to have the strength and the performance as a layer in combination with the material, and thin enough to have manufacturing suitability and post-processing suitability. About 50-200 micrometers is suitable. As the material, in the case of an aluminum foil, a JIS 2000 type aluminum alloy that is Al—Cu—Mg type, a 5000 type aluminum alloy that is Al—Mg type, a 6000 type aluminum alloy that is Al—Mg—Si type, Al— Examples include Zn-Mg-based 7000-based aluminum alloy. For a stainless steel foil, austenitic SUS301, SUS304, and the like can be used. For a ferrite foil, SUS430 can be used. These may be used alone or in a plurality.

  The thermoplastic resin decorative sheet 4 is preferably composed of a single layer or a plurality of layers made of amorphous crystalline polyester resin, amorphous polyester resin, biaxially stretched polyester resin, polypropylene resin, polyethylene resin, or the like. Used. In particular, there may be mentioned a method in which a colored thermoplastic resin layer is provided in the lower layer, a pattern layer is provided, and then the transparent thermoplastic resin layer 6 is provided on the upper surface. The thickness of the thermoplastic resin decorative sheet 4 is preferably 50 to 200 μm in consideration of caster resistance, impact resistance, scratch resistance, handling properties, blade abrasion, and the like. Although not shown, as the pattern layer, a known two-component urethane resin binder made of an opaque inorganic or organic pigment, a gravure ink made of an acrylic resin and a vinyl chloride-vinyl acetate resin copolymer, or the like can be used.

In addition, as the surface protective layer 5, 6 to 15 g / m ^{2 of} an ultraviolet curable resin or a two-component urethane resin to which an ultraviolet absorber, a light stabilizer, glass beads, etc. are added may be applied in consideration of slipperiness. . In this case, it is desirable to adjust the surface hardness in consideration of the resilience of the impact resistance test and caster resistance test.

  Moreover, the embossing plate which consists of a metal roll etc. may be pressed on the thermoplastic resin decorative sheet 4, and the groove processing 10 and 11 etc. may be given. When coloring the groove part of a recessed part, the recessed coloring ink layer can use the gravure ink which consists of a well-known opaque inorganic and organic pigment 1 liquid, or 2 liquid urethane type resin binders.

  A wood grain pattern was printed on one side of a colored polypropylene film having a thickness of 70 μm (“Rivester TPO” manufactured by Riken Technos Co., Ltd.) with a gravure ink (“Lamister” manufactured by Toyo Ink Manufacturing Co., Ltd.) using a gravure printing machine. Thereafter, a two-component urethane primer resin containing silica powder on the surface opposite to the printed surface was applied with a gravure so that the thickness after drying was 1 μm.

On the printed surface, a two-component urethane resin adhesive of polyester polyol as an anchor agent and isophorone diisocyanate as a curing agent is applied so that the coating amount after drying becomes 1 g / m ^2. A polypropylene resin obtained by modifying maleic acid by adding 0.5 parts of an ultraviolet absorber, 0.5 parts of a hindered amine light stabilizer and 0.2 parts of a heat stabilizer to a mixture of 50 parts of homopolypropylene and 50 parts of random polypropylene. The thickness after drying was 80 μm, and at the same time, the adhesive resin was coextruded and laminated while spraying ozone gas so that the thickness after drying was 10 μm. The thermoplastic resin decorative sheet 4 was obtained as described above.

On the coextruded laminate surface of the thermoplastic resin decorative sheet 4, a recoat layer made of a two-component urethane resin is provided so that the thickness after drying becomes 1 g / m ^2, and then urethane acrylate (Daicel Usubi Co., Ltd.) "Ebecryl 4858") 100 parts, pentaerythritol tetraacrylate (Daicel Usubi Co., Ltd. "PETA-K") 20 parts, benzophenone photoinitiator (Daicel Usubi Co., Ltd. "Ebecryl BZO") 0.5 Part, 0.5 part of benzotriazole UV absorber, 0.5 part of hindered amine light stabilizer and 2 parts of glass beads were applied to a thickness of 5 μm, and UV irradiation by metal halide lamp The surface protective layer 5 was provided by curing.

The coating amount after drying a two-component urethane resin adhesive (“TM-593” manufactured by Toyo Morton Co., Ltd.) on the surface of the thermoplastic resin decorative sheet 4 provided with the surface protective layer 5 is 10 g / It was coated so as to m ^2, a stainless steel foil of austenitic 18Cr-8Ni thickness 50μm of this surface becomes metallic intermediate layer 3 (SUS304), and wound by dry lamination.

Thereafter, a lauan plywood having a thickness of 12 mm × 303 mm × 1818 mm was used as the wood-based substrate 1, and a two-part aqueous emulsion adhesive (“Rikabond” manufactured by Chuo Rika Kogyo Co., Ltd. (BA-10L / BA-11B = 100/5) ) after 100 g / m ² coated at a wet state, bonding the above metallic intermediate layer 3 side were dry laminate in the laminator, after 12 hours curing, grooves reaching to machining and woody substrate end After processing, joint coloring was performed with a two-component urethane resin colorant to obtain a flooring decorative material.

<Comparative Example 1>
A flooring decorative material was produced in the same manner as in Example 1 except that there was no metal intermediate layer.

<Performance test>
As a cigarette resistance test, a commercial cigarette with a fire was observed on the floor decorative material until it burned out. As an impact resistance test, a test was performed in accordance with the DuPont falling ball test (JIS K5400), and the amount of dents was measured. As a caster resistance test, a polycarbonate double caster (diameter 40 mm, 1 wheel width 9 mm, 2 wheel width 18 mm) was loaded with a weight of 25 kg (about 245 N), 10,000 times (1 stroke 20 cm or more, 5,000 reciprocations), and the caster was moved on the floor decorative material at a speed of 20 cm / sec. The results are shown in Table 1.

  As described above, according to the present invention, by providing the metal intermediate layer, it was possible to obtain a floor decorative material excellent in both cigarette resistance and impact resistance.

It is explanatory drawing which shows the structure of the cross section of one Example of the decorative material for floors of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wood type base material 2 ... Adhesive layer 3 ... Metal intermediate layer 4 ... Thermoplastic resin decorative sheet 5 ... Surface protection layer 6 ... Transparent thermoplastic resin layer 10 ... U-shaped groove 11 ... V-shaped groove

Claims (1)

In a floor decorative material in which a thermoplastic resin decorative sheet is laminated on a wooden base material, an austenitic 18Cr-8Ni stainless steel foil (thickness 50 μm) between the wooden base material and the thermoplastic resin decorative sheet ( A floor decorative material provided with a metal intermediate layer of SUS304) and having a dent after a Du Pont impact drop test (JIS K5400-1990) of the floor decorative material of 0.7 mm or less.

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