JP2007031978A - Decorative material for floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative material for a floor superior in restorableness of a recess, easy in adjusting a color tone, having caster resistance and impact resistance, easy in manufacture, and superior in an aptitude for processing. <P>SOLUTION: This decorative material for the floor is formed by laminating a thermoplastic resin decorative sheet on a woody base material; and is characterized by arranging a high polymer gel layer having a compression elastic modulus of 0.01 to 5 MPa (JIS K7312-1996) and the thickness of 0.05 to 2 mm in a 20°C atmosphere between the woody base material and the thermoplastic resin decorative sheet. Thus, there is the effect of smoothly returning a surface since high polymer gel flows even if a moving trace of a caster is deformed when a recess is generated by receiving impact by making the floor absorb impact force energy when a person falls down and drops an article without losing woody warmth by arranging the predetermined high polymer gel layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

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 flooring decorative material excellent in resilience such as impact resistance, caster resistance, productivity, and dents.

  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 made of a wood-based base material and a synthetic resin paint, it was difficult to provide scratch resistance by a chair with casters, so-called caster resistance (Patent Document 1). In addition, there is a problem that once the dent is made, it is difficult to restore.

Further, a flooring decorative material in which a thermoplastic resin decorative sheet is laminated on a wooden 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 it has excellent resilience such as dents, is easy to adjust the color tone, and has caster resistance, impact resistance, etc. Another object of the present invention is to provide a floor covering material that can be easily manufactured and has excellent processability.

  The present invention solves this problem, i.e., the invention according to claim 1 is a floor decorative material in which a thermoplastic resin decorative sheet is laminated on a wooden base material. A floor provided with a polymer gel layer having a compression elastic modulus of 0.01 to 5 MPa (JIS K7312-1996) and a thickness of 0.05 to 2 mm in an atmosphere of 20 ° C. between the resin decorative sheet. For cosmetics.

  According to the invention of the first aspect of the present invention, the predetermined polymer gel layer is provided, so that the warmth of the wood is not lost, and when the person falls or drops an object, the floor is Even if the impact force energy is absorbed and the dent is generated by the impact or the moving trace of the caster is deformed, the polymer gel flows and the surface is smoothed.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of the floor decorative material of the present invention. A polymer gel 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. Further, 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 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 used for the adhesive layer 2, a known aqueous adhesive composed of a two-component urethane-modified vinyl resin, a one-component vinyl acetate resin emulsion-based adhesive, a moisture-curable urethane resin-based hot melt adhesive, or the like can be used. It is. A thermoplastic resin hot melt adhesive can also be used. The coating amount is preferably about 3 to ²⁰ g / m ^{2 in} weight after drying from the viewpoint of adhesiveness.

The polymer gel used for the polymer gel layer 3 is not particularly limited as long as it has a thickness of 0.05 to 2 mm and a compressive elastic modulus in an atmosphere of 20 ° C. of 0.01 to 5 MPa (JIS K7312-1996). However, it consists of polyols such as silicone gels, aliphatic polyhydric alcohols, polyester polyols, polyether polyols, castor oil-based polyols, and polyisocyanates. (Cyclic isocyanates can also be used. Desirably, a rubber elastic resin made of polyurethane gel or thermoplastic resin can be suitably used. Specifically, vulcanized natural rubber having a cis-1,4-polyisoprene structure, rubber added with carbon black, styrene-butadiene rubber, butadiene rubber, isoprene rubber, butyl rubber, chloroprene rubber, ethylene-propylene Rubber (copolymer), acrylotolyl-butadiene (copolymer), acrylic rubber, fluororubber, silicone rubber, ionomer resin (Mitsui / DuPont Polychemical Co., Ltd .: “Himiran”), etc. Mixtures of these can be used. In addition, it is possible to use a porous material having a high elasticity of about 10 ⁻⁴ N / m ^2, such as gel, sponge rubber, urethane foam and the like having high elasticity.

  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.

Further, as the surface protective layer 5, in consideration of slipping property, a known ultraviolet absorber, light stabilizer, glass beads and the like are added, and an application amount of 6 to 15 g / m ^{2 is} applied. You may do it. 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.

  Further, an embossed plate made of a metal roll or the like may be pressed against the thermoplastic resin decorative sheet 4 to give the U-shaped groove 10, the V-shaped groove 11, and the like. 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 is 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 to m ² , and this surface was coated with urethane gel having a compression elastic modulus of 3.3 MPa (JIS K7312-1996) in an atmosphere of 20 ° C. (manufactured by Exeal Corporation: “Hypergel hardness 50”). A polymer gel layer having a thickness of 0.1 mm is provided, a lauan plywood having a thickness of 12 mm × 303 mm × 1818 mm is used as the decorative board substrate 1, and a two-component aqueous emulsion adhesive (Chuo Rika Kogyo Co., Ltd.) is used as the adhesive layer 2 on this surface. ) “Likabond” (BA-10L / BA-11B = 100/5)) applied in a wet state to 100 g / m ² , and then the surface provided with the polymer gel layer After laminating with a laminator, curing for 12 hours, forming a V-shaped groove by grooving the end part and reaching the woody base material, then performing joint coloring with a two-component urethane resin colorant and flooring of the present invention A cosmetic material was obtained.
<Comparative Example 1>
A flooring decorative material was produced in the same manner as in Example 1 except that the polymer gel layer 3 was not provided in Example 1.
<Performance evaluation>
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 subsequent traces were observed.

  As the impact resistance test, the test was conducted in accordance with the DuPont falling ball test (JIS K5400), which is originally a coating film evaluation method. However, as an evaluation method, the dent amount of the flooring was measured. The results are shown in Table 1.

  INDUSTRIAL APPLICABILITY The present invention can be used as a decorative material for floors where heavy objects such as stores, offices, and gymnasiums are assumed to move. It can also be used suitably for permanent exhibition spaces.

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 ... Polymer gel 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, a compression elastic modulus in an atmosphere of 20 ° C. is 0.01 between the wooden base material and the thermoplastic resin decorative sheet. A floor decorative material provided with a polymer gel layer having a thickness of 0.05 to 2 mm at -5 MPa (JIS K7312-1996).

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