JP2009090586A - Decorative material for flooring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative material for flooring hardly attached with a dent or the like, excellent in winding aptitude of a decorative sheet, easy in adjustment of a color tone, having caster resistant, impact resistant or the like, easily manufactured and excellent in processing aptitude. <P>SOLUTION: The decorative material for the flooring laminating a thermoplastic resin decorative sheet 4 on a woody substrate 1 keeps the woody substrate and the thermoplastic resin decorative sheet interlaid with a thermoplastic resin intermediate layer with a thickness of 20 to 200 μm of a single layer or a multiple layer of a liquid crystal polymer resin, or a thermoplastic resin intermediate layer 3 with a thickness of 20 to 200 μm including a mixture a liquid crystal polymer of 0.5 to 10 pts.wt. and a thermoplastic resin of 100 pts.wt with its dispersion. <P>COPYRIGHT: (C)2009,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 floor decorative material having excellent surface strength such as impact resistance, caster resistance, dimensional stability, ability to wind up a decorative sheet, 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 colors 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 on the surface of a substrate is known (Patent Document 1). 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. 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). Moreover, although the manufacturing method regarding a liquid crystalline polymer was known, it was not known in the sheet | seat state for floor uses (patent document 3).
JP 52-76409 A JP 2004-17590 A Japanese Patent No. 2533734

  The present invention has been made to solve the above-mentioned problems, and the problem is that it is difficult to have a dent, is excellent in winding up of a decorative sheet, is easy to adjust the color tone, and is resistant to damage. An object of the present invention is to provide a floor decorative material that has caster properties, impact resistance, etc., 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 decorative material, wherein a thermoplastic resin intermediate layer having a thickness of 20 to 200 μm is provided between the resin decorative sheet and a single layer or a plurality of layers of a liquid crystalline polymer resin.

  Further, the invention according to claim 2 is the floor decorative material in which the thermoplastic resin decorative sheet is laminated on the wooden base material, and the thermoplastic resin is provided between the wooden base material and the thermoplastic resin decorative sheet. A floor decorative material comprising a thermoplastic resin intermediate layer having a thickness of 20 to 200 μm, comprising a mixture in which 0.5 to 10 parts by weight of a liquid crystalline polymer is dispersed with respect to 100 parts by weight of a resin. .

  According to the first aspect of the present invention, since the thermoplastic resin intermediate layer made of a liquid crystalline polymer is provided between the woody base material and the thermoplastic resin decorative sheet, the surface strength is increased. Even if it receives it, there is an effect that it is hard to dent. In addition, there is an effect that the dimensional change is difficult even if the room temperature rises in the summer or when the surface temperature of the flooring rises when the sun hits. And since it can wind up easily at the time of manufacture of a decorative sheet, there exists an effect that the production by a roll-to-roll becomes easy.

  According to the second aspect of the present invention, a thermoplastic resin intermediate layer made of a mixture in which a liquid crystalline polymer is dispersed is provided between the woody base material and the thermoplastic resin decorative sheet. There is an improvement effect. In addition, since the liquid crystalline polymer is dispersed in the thermoplastic resin, the liquid crystalline polymer is peeled off at the interface of the thermoplastic resin during the impact test, so the energy of destruction is absorbed, and the surface strength increases, so that even if subjected to an impact The effect is difficult. In addition, there is an effect that the dimensional change is difficult even if the room temperature rises in the summer or when the surface temperature of the flooring rises when the sun hits. And since it can wind up easily at the time of manufacture of a decorative sheet, there exists an effect that the production by a roll-to-roll becomes easy.

  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 thermoplastic resin intermediate layer 3 is provided via an adhesive layer 2 provided as appropriate on the wood-based substrate 1, 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, a V-shaped groove 11 and the like may be provided as appropriate.

  As the woody base material 1 in the present invention, South Seawood plywood, particle board, medium density fiber board, and 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.

Adhesives used for the adhesive layer 2 provided as appropriate include known aqueous adhesives composed of two liquid urethane-modified vinyl resins, one liquid vinyl acetate resin emulsion adhesives, moisture-curing urethane resin hot melt adhesives, and the like. It can be used. A thermoplastic resin hot melt adhesive can also be used. The coating amount is preferably about 3 to ²⁰ g / m ² after drying from the viewpoint of adhesiveness.

  As the thermoplastic resin intermediate layer 3 in the present invention, a single layer or multiple layers of a liquid crystalline polymer resin, or a mixture in which 0.5 to 10 parts by weight of a liquid crystalline polymer is dispersed with respect to 100 parts by weight of a thermoplastic resin. Use what

  Liquid crystalline polymer is oriented in the MD direction of the molding substrate (the direction parallel to the film surface and along the direction of film formation). It exhibits optical anisotropy and exhibits a behavior in which molecular chains are remarkably oriented in the flow direction due to low shear stress, and is generally called a thermotropic liquid crystal type (melted liquid crystal type) polymer. .

  As the liquid crystalline polymer in the present invention, a polyester composed of a copolymer of parahydroxybenzoic acid and polyethylene terephthalate is preferably used. In addition, polyesters having repeating units derived from three kinds of compounds of parahydroxybenzoic acid, phthalic acid and biphenol, respectively, having repeating units derived from two kinds of compounds of parahydroxybenzoic acid and hydroxynaphthalic acid, respectively. Examples thereof include polyesters and polyesters having repeating units each derived from three types of compounds of parahydroxybenzoic acid, phthalic acid and polyethylene terephthalate.

  Other components in the thermoplastic resin intermediate layer 3 include polypropylene resins, polyethylene resins, polybutene, polymethylene, and other polyolefin resins, ethylene-vinyl acetate copolymers or saponified products thereof, ethylene- (meth) acrylic acid ( Ester) copolymers, polyolefin copolymers such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyarylate, polycarbonate and other polyester resins, polymethyl methacrylate and other acrylic resins, 6-nylon, 6, Polyamide resins such as 6-nylon and 6,10-nylon, polystyrene resins, styrene resins such as acrylonitrile-styrene copolymer resin, acrylonitrile-butadiene-styrene copolymer resin, cellulose acetate, Fibrin derivatives such as cellulose, chlorine resins such as polyvinyl chloride and polyvinylidene chloride, fluorine resins such as polyvinyl fluoride, polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, etc. Two or more types of copolymers or mixtures selected from these, mixtures, composites, laminates, and the like can be used.

  The mixing of the thermoplastic resin and the liquid crystal polymer in the case where 0.5 to 10 parts by weight of the liquid crystalline polymer is dispersed with respect to 100 parts by weight of the thermoplastic resin is not particularly limited, but the mixing container itself rotates. General methods include convection mixing that mixes with rotation of a stirring blade (paddle or ribbon), mixing with a Banbury mixer, pelletizing with a pelletizer, and mixing and pelletizing with a twin screw extruder It is. As the thermoplastic resin used for dispersing the liquid crystalline polymer, the same ones as those mentioned as the other components in the thermoplastic resin intermediate layer 3 when the liquid crystalline polymer layer is used can be used. .

  The thickness of the thermoplastic resin intermediate layer 3 in the present invention is 20 to 200 μm in any case. By setting it as this range, each of the items of impact resistance, surface strength, dimensional stability, and winding property as a decorative sheet can be balanced.

  The thermoplastic resin decorative sheet 4 in the present invention is composed of a single layer or a plurality of layers made of an amorphous crystalline polyester resin, an amorphous polyester resin, a biaxially stretched polyester resin, a polypropylene resin, a polyethylene resin, or the like. Are preferably 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 (not shown) 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. 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 slipperiness, 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. May be. 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.

As a thermoplastic resin decorative sheet 4, gravure printing with gravure ink (Toyo Ink Manufacturing Co., Ltd. “Lamister”) is performed on one side of a 70 μm thick colored polypropylene film (“Rivester TPO” manufactured by Riken Technos Co., Ltd.). Printed by 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, polyester polyol as an anchor agent and a two-component urethane resin adhesive of isophorone diisocyanate as a curing agent were applied so that the coating amount after drying was 10 g / m ² .

  As the transparent thermoplastic resin layer 6, a mixture of 50 parts of homopolypropylene and 50 parts of random polypropylene was added with 0.5 parts of an ultraviolet absorber, 0.5 parts of a hindered amine light stabilizer, and 0.2 parts of a heat stabilizer. The thermoplastic resin decorative sheet is sprayed with ozone gas while spraying the acid-modified polypropylene resin so that the thickness after drying is 80 μm, and at the same time the adhesive resin is 10 μm after drying. The surface was coated with the anchor agent No. 4 and coextruded and laminated with an adhesive resin in between. The U-shaped groove 10 was provided on the surface of the transparent thermoplastic resin layer side by the embossing roll on the transparent thermoplastic resin layer 6 side simultaneously with the extrusion lamination.

After providing a recoat layer made of a two-component urethane resin on the surface of the transparent thermoplastic resin layer 6 so that the thickness after drying becomes 1 g / m ² , urethane acrylate (Daicel Usubi ( "Ebecryl 4858" manufactured by Co., Ltd.) 100 parts, 20 parts of pentaerythritol tetraacrylate ("PETA-K" manufactured by Daicel-Usibi Co., Ltd.), benzophenone photoinitiator ("Ebecryl BZO" manufactured by Daicel-Usibi Co., Ltd.) 0 5 parts, 0.5 part of benzotriazole-based UV absorber, 0.5 part of hindered amine-based light stabilizer and 2 parts of glass beads were applied to a thickness of 5 μm and applied with a metal halide lamp. Cured by UV irradiation.

  As a liquid crystalline polymer, paraacetooxybenzoic acid and polyethylene terephthalate (repeated molecular weight 192) were heated at 275 ° C. for 40 minutes while flowing nitrogen gas at a molar ratio of 4: 6 (weight ratio: 2 kg: 3 kg) to obtain parahydroxybenzoic acid. After adding 4.9 kg, it was heated at 275 ° C. for 30 minutes for 1 hour and 30 minutes to obtain a copolymer.

As the thermoplastic resin intermediate layer 3, the coating amount after drying a two-component urethane resin adhesive (“TM-593” manufactured by Toyo Morton Co., Ltd.) on the back surface of the thermoplastic resin decorative sheet 4 becomes 10 g / m ² . After coating, the liquid crystalline polymer was extruded to 80 μm by a biaxial extruder and laminated.
The above steps were all performed on one line, but the steps of unwinding from the roll and winding up on the roll could be performed without any problem.

A lauan plywood with a thickness of 12 mm is used as the wood-based substrate 1, and a two-component aqueous emulsion adhesive (“Rikabond BA-10L” and “Rikabond BA-11B” manufactured by Chuo Rika Kogyo Co., Ltd.) is used as an adhesive layer 2 on this surface. 100: 5 mixed) in a wet state to 100 g / m ² , and the thermoplastic resin intermediate sheet 3 side of the thermoplastic resin decorative sheet 4 is bonded with a laminator and cured for 12 hours. A flooring cosmetic material was obtained.

  As the thermoplastic resin intermediate layer 3, 100 parts by weight of polypropylene resin (J-3003GV manufactured by Prime Polymer Co., Ltd.) and 8 parts by weight of the liquid crystalline polymer described in Example 1 were mixed (cylinder) by a biaxial extrusion mixer. A floor decorative material was obtained in the same manner as in Example 1 except that a pellet was formed into a pellet and was extruded to 80 μm at a cylinder temperature of 290 ° C. using an extruder.

<Comparative Example 1>
A flooring decorative material was obtained in the same manner as in Example 1 except that a polyethylene resin was used as the thermoplastic resin intermediate layer 3.

<Comparative example 2>
A flooring decorative material was obtained in the same manner as in Example 1 except that the thickness of the thermoplastic resin intermediate layer 3 was 0.40 mm.

<Comparative Example 3>
A flooring decorative material was obtained in the same manner as in Example 1 except that the thickness of the thermoplastic resin intermediate layer 3 was 0.03 mm.

<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 weight was dropped from a height of 300 mm, and the amount of dents in the flooring was measured.

  Table 1 shows the evaluation results of the floor decorative materials obtained in Examples 1-2 and Comparative Examples 1-3.

  The present invention relates to a decorative material for floors used in houses, stores, offices, gymnasiums and the like. More specifically, it can be used for a floor decorative material having excellent surface strength such as impact resistance, caster resistance, dimensional stability, suitability for winding a decorative sheet, and dents.

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 ... Thermoplastic resin 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 (2)

  In a floor decorative material obtained by laminating a thermoplastic resin decorative sheet on a wooden base material, the thickness of a single layer or multiple layers of a liquid crystalline polymer resin between the wooden base material and the thermoplastic resin decorative sheet A floor decorative material provided with a 20-200 μm thermoplastic resin intermediate layer. In the floor decorative material formed by laminating a thermoplastic resin decorative sheet on a wooden base material, 0.5 parts per 100 parts by weight of the thermoplastic resin is provided between the wooden base material and the thermoplastic resin decorative sheet. A floor decorative material provided with a thermoplastic resin intermediate layer having a thickness of 20 to 200 μm, comprising a mixture in which 10 to 10 parts by weight of a liquid crystalline polymer is dispersed.

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