JP2019100155A - Floor material - Google Patents

Abstract

To provide a floor material which can be easily constructed even by a carpenter workman who constructs a wooden floor material.SOLUTION: A floor material comprises: a wooden base material 11; a decorative sheet 13 provided on a front face side 11a of the wooden base material 11; and a cushion layer 15 provided on a rear face side 11b of the wooden base material 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to flooring.

Conventionally, for example, a floor material having a cushioning property has been proposed that includes a base material and a cushion layer such as a foam layer provided on the back side of the base material (see, for example, Patent Document 1). ).
By the way, although enforcement of wood-based flooring such as flooring is performed by a carpenter, enforcement of a flooring having a cushioning property as described in Patent Document 1 is performed by another craftsman such as an interior craftsman ing. Therefore, at construction sites etc., many construction workers were needed.

JP 2003-56167 A

  This invention is made in view of such a situation, Comprising: It aims at providing the flooring which can be easily constructed even by a carpenter.

  In order to solve the above problems, one aspect of the present invention comprises (a) a wood base, (b) a decorative sheet provided on the front side of the wood base, and (c) on the back side of the wood base. The gist is that the wallpaper is provided with a cushion layer provided.

  ADVANTAGE OF THE INVENTION According to this invention, since it has a wood base material as a base material, the floor material which can be easily constructed even by the carpenter who constructs a wood-based floor material can be provided.

It is a sectional view showing typically the example of composition of the flooring concerning the embodiment of the present invention. It is sectional drawing which shows the structural example of a decorative sheet typically.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to embodiment described below, It is also possible to add modification, such as a design change, based on a person skilled in the art knowledge, and such modification is added and implementation. Forms are also included within the scope of the present invention. Further, each drawing is exaggerated as appropriate to facilitate understanding.

(Constitution)
As shown in FIG. 1, a flooring 10 according to an embodiment of the present invention includes a wood base 11, a decorative sheet 13 provided on the surface 11 a side of the wood base 11, and a back surface 11 b of the wood base 11. And a cushioning layer 15 provided on the And the flooring which has a cushioning property, ie, the finishing material used for the floor of a building, is formed. For example, it is suitable for a floor covering used in places such as entrances and verandas, and a sanitary flooring used in sanitations such as toilets.

(Woody substrate)
The wood substrate 11 is formed, for example, by mixing a small piece of wood with an adhesive and subjecting it to heat pressing and forming a particle board, or mixing a wood fiber with an adhesive and subjecting it to heat pressing. Fiberboard can be used. When the floor material 10 is used as a floor material for soil, etc., the wood substrate 11 needs to be water resistant, but in consideration of swelling due to water wetting, as the particle board, for example, an adhesive mixed with small pieces of wood It is preferable that the division by the adhesive defined in JIS A5908 is P type or M type. Moreover, as a fiber board, the division by the adhesive agent prescribed | regulated to JIS A5905 is a thing of P type or M type, for example is suitable. In particular, an M-type adhesive, that is, a medium density fiber board (hereinafter, also referred to as “MDF”) molded with an urea-melamine co-condensation resin-based adhesive is most preferable.

  Further, in consideration of the durability of the adhesive due to water wetting, for example, a special class or one class of plywood defined by the JAS standard, that is, the Japanese Agricultural Standard, is suitable as the wood base material 11. The "special class" and "class 1" are types of durability of the bonding part of the plywood. In particular, in one kind of plywood, that is, in one kind of immersion peeling test, plywood without peeling is most preferable. The thickness of the wood substrate 11 is not particularly limited, but if the thickness is too thin, the substrate is likely to be cracked at the time of construction, and if it is too thick, the flexibility is reduced and the construction becomes difficult. Therefore, for example, 2 mm or more and 4.5 mm or less is preferable.

(Cosmetic sheet)
As shown in FIG. 2, the decorative sheet 13 has a multilayer structure having at least a base sheet 135 and a surface sheet 132 provided on the surface 135 a side of the base sheet 135, that is, a plurality of layers The decorative sheet of the structure laminated | stacked is formed. As the base sheet 135 and the surface sheet 132, for example, a sheet made of a thermoplastic resin can be used.

  There is no restriction | limiting in particular as a thermoplastic resin used for the base material sheet 135 or the surface sheet 132, The thing similar to the thermoplastic resin used for the base material sheet or the surface sheet by the conventional decorative sheet can be used. For example, polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, ethylene-α-olefin copolymer, propylene-α-olefin copolymer, ethylene-vinyl acetate copolymer, Polyolefins such as olefin-based copolymer resin such as ethylene-vinyl alcohol copolymer, ethylene- (meth) acrylic acid (ester) copolymer, ethylene-unsaturated carboxylic acid copolymer metal neutralized product (ionomer) Resin, polyethylene terephthalate, polybutylene terephthalate, polytetramethylene terephthalate, polyethylene naphthalate, polyethylene terephthalate-isophthalate copolymer, 1,4-cyclohexanedimethanol copolymer polyethylene terephthalate, polya Polyester resins such as acrylate, polycarbonate, poly (meth) acrylonitrile, polymethyl (meth) acrylate, polyethyl (meth) acrylate, polybutyl (meth) acrylate, acrylic resins such as polyacrylamide, 6-nylon, 6,6-nylon Polyamide resins such as 6,10-nylon, polystyrene resins, styrene resins such as AS resin and ABS resin, polyvinyl chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetals, vinyl acetals such as polyvinyl acetal, polyvinyl butyral, polyvinyl fluoride , Polyvinylidene fluoride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, fluorine resin such as ethylene-perfluoroalkyl vinyl ether copolymer, etc., or a mixture of two or more thereof Body, complex, a laminate or the like can be used. The thermoplastic resins used for the base sheet 135 and the surface sheet 132 may be of the same type, or may be of different types.

  Here, although a large number of thermoplastic resins have been mentioned as thermoplastic resins usable for the base sheet 135 and the surface sheet 132, polyvinyl chloride resin and the like are considered in view of the recent social interest in environmental problems. It is not desirable to use a thermoplastic resin containing chlorine (halogen), but it is desirable to use a non-halogen thermoplastic resin. In particular, it is most desirable to use a polyolefin resin or polyester resin (amorphous or biaxially stretched) as the non-halogen thermoplastic resin in terms of various physical properties, processability, versatility, economy, etc. .

  The polyolefin resin may be appropriately selected and used according to the purpose of use of the decorative sheet 13 from the many types listed above. In particular, the most suitable for general use is a polypropylene-based resin, that is, a homopolymer or copolymer mainly composed of propylene. For example, a homopolypropylene resin, a random polypropylene resin, a block polypropylene resin or the like may be used alone or in combination, or a resin in which an atactic polypropylene is further appropriately blended may be used. The copolymer may also be an olefin-based monomer other than propylene, for example, an α-olefin having a polypropylene crystal part and having 2 to 20 carbon atoms other than propylene, preferably ethylene, butene Examples thereof include propylene-α-olefin copolymers containing 15 mol% or more of one or two or more comonomers of 1,4-methylpentene-1, hexene-1 or octene-1. Also, low density polyethylene, ethylene-α-olefin copolymer, ethylene-propylene copolymer rubber, ethylene-propylene-non-conjugated diene copolymer rubber, styrene-butadiene copolymer, which are usually used for softening polypropylene-based resins Modifiers such as coalesced or their hydrogenated substances can be added as appropriate.

  The base sheet 135 and the surface sheet 132 may be, for example, a colorant, a filler, an ultraviolet light absorber, a light stabilizer, a heat stabilizer, an antioxidant, an antistatic agent, a lubricant, a flame retardant, an antibacterial agent, as necessary. You may add 1 or more types chosen from various additives, such as an agent, a mildew preventing agent, a lubricant, a light-scattering agent, and a gloss regulator. In addition, it is preferable that the top sheet 132 has, for example, such transparency as to allow a sheet or the like disposed on the back surface 132 b side of the top sheet 132 to be seen through. For example, it is made colorless and transparent, colored and transparent, and translucent. Further, when the base sheet 135 is to cover color variations, defects and the like of the surface 11 a of the wood base 11, it is preferable that the base sheet 135 be colored to be opaque and opaque. When the texture of the surface 11 a of the wood substrate 11 is to be used, it is preferable to have transparency to the extent that the surface 11 a of the wood substrate 11 can be seen through.

  In addition to the base sheet 135 and the surface sheet 132, the decorative sheet 13 may be, for example, the surface coat layer 131, the pattern layer 134, the adhesive layer 133, the primer layer 136, etc. May be provided as appropriate. In FIG. 2, the surface coating layer 131 is provided on the surface 132 a of the surface sheet 132. Further, the picture layer 134 and the adhesive layer 133 are provided by being laminated between the base sheet 135 and the top sheet 132. Specifically, the pattern layer 134 is provided on the base sheet 135 side, and the adhesive layer 133 is provided on the top sheet 132 side. Also, the primer layer 136 is provided on the back surface 135 b of the base sheet 135. That is, the design layer 134, the adhesive layer 133, the surface sheet 132, and the surface coating layer 131 are laminated in this order on the surface 135a of the substrate sheet 135, and the primer layer 136 is formed on the back surface 135b of the substrate sheet 135. It is provided.

  In addition, in the flooring 10 which concerns on embodiment of this invention, although the example which provides the pattern layer 134 in the base-material sheet 135 side and provides the contact bonding layer 133 in the surface sheet 132 side was shown, adopting other composition also. it can. The pattern layer 134 and the adhesive layer 133 can be in any arrangement according to the manufacturing procedure or the like. For example, after the pattern layer 134 is provided on the front surface 135a of the base sheet 135, the pattern layer 134 and the back surface 132b of the surface sheet 132 may be adhered via the adhesive layer 133. Alternatively, for example, after the pattern layer 134 is provided on the back surface 132b of the top sheet 132, the pattern layer 134 and the back surface 132b of the base sheet 135 may be bonded via the adhesive layer 133. Furthermore, for example, after providing the design layer 134 on each of the front surface 132a and the rear surface 132b of the front sheet 132, the design layer 134 on the rear surface 132b and the front surface 135a of the base sheet 135 are bonded via the adhesive layer 133. It may be an array of

  In addition, an embossed pattern 137, that is, an uneven pattern formed by embossing, is provided on the surface 13a of the decorative sheet 13. The presence of the embossed pattern 137 on the surface 13 a of the decorative sheet 13 can improve the anti-slip performance of the surface 13 a. The depth of the emboss pattern 137, that is, the height difference between the recess and the protrusion, is easier to use as a sanitary floor material because sand, soil, etc. easily enter the recess when the floor material 10 is used as an interfloor material. It is preferable to reduce the size.

  The surface coating layer 131 is disposed on the surface side of the decorative sheet 13 and is provided as necessary in order to function as a surface protective layer or a gloss adjusting layer. When the floor material 10 is used as a floor material for soil, durability is required because it is used at a place of earth foot, but in consideration of durability, as a material of the surface coating layer 131, for example, acrylic urethane resin or ionization Radiation curable resins are preferred. As the acrylic urethane resin, for example, a reaction product containing an acrylic polyol compound as a main agent and an isocyanate compound as a curing agent can be used. As an acrylic polyol compound, for example, methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, methacrylic acid- Monomer containing hydroxyl group such as 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate and the like to common acrylic monomers such as 2-ethylhexyl And, optionally, styrene, α-methylstyrene, vinyltoluene, divinylbenzene, vinyl acetate, vinyl butyrate, vinyl versatate, ethyl vinyl ether, acrylonitrile, methacrylonitrile, etc. Possible polymerizable monomer and then blended, obtained by copolymerizing, it is possible to employ a polymer compound acrylic having a hydroxyl group in the side chain.

  Further, as the isocyanate compound, for example, tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), naphthalene diisocyanate (NDI), xylylene diisocyanate (XDI), hydrogenated diphenylmethane diisocyanate (hydrogenated MDI), hydrogenated xylylene diisocyanate ( Hydrogenated XDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI) and the like can be used. In particular, when the floor material 10 is used as an entrance-to-earth floor material of a veranda, the surface coat layer 131 needs weather resistance, but considering the weather resistance, non-yellowing isocyanate compound having no aromatic ring, ie, aliphatic Or cycloaliphatic isocyanate compounds are preferred.

  Moreover, as the ionizing radiation curable resin, for example, at least one of a prepolymer, an oligomer and a monomer having a polymerizable unsaturated bond such as a (meth) acryloyl group having a property of causing a crosslinking reaction by irradiation of ionizing radiation The composition can be used. As ionizing radiation, for example, an electron beam or ultraviolet light can be used. For example, additives such as a polymerization initiator and a sensitizer may be added to the ionizing radiation curable resin, if necessary.

  Examples of prepolymers and oligomers having a polymerizable unsaturated bond include melamine (meth) acrylate, epoxy (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate and polyol (meth Acrylate etc. can be used. Moreover, as a monomer, for example, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, cyclohexyl (meth) acrylate, ethylhexyl (meth) acrylate, hydroxyethyl (meth) acrylate, glycidyl (meth) acrylate Etc., and bifunctional monomers such as ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, polyethylene glycol diacrylate, propylene glycol diacrylate, butanediol diacrylate and hexanediol diacrylate, trimethylolpropane Using polyfunctional monomers such as triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, etc. Door can be.

  The thickness of the surface coat layer 131 is not particularly limited, but if it is too thin, the effect is poor, and if it is too thick, the flexibility is reduced and it is easily broken. Therefore, for example, 1 μm or more and 20 μm or less is preferable, and particularly 9 μm or more and 15 μm or less is most preferable. In the surface coating layer 131, for example, an ultraviolet light absorber, a light stabilizer, a heat stabilizer, an antioxidant, a coloring agent, a flame retardant, an antibacterial agent, a mildew agent, an antistatic agent, a lubricant, as necessary. You may add 1 or more types chosen from various fillers (filler), such as a lubricant and a gloss regulator. Further, if necessary, a surface protective layer, a gloss adjusting layer, or a layer having both of these functions may be separately provided on the surface 131 a of the surface coating layer 131. In addition, it is preferable that the surface coating layer 131 has transparency to such an extent that the surface 132a of the surface sheet 132 arrange | positioned at the back surface 131b side of the surface coating layer 131 can be seen, for example. For example, it is made colorless and transparent, colored and transparent, and translucent.

  The pattern layer 134 is provided as necessary in order to provide the decorative sheet 13 with a design with a pattern. When the color of the base sheet 135 can be substituted for the pattern layer 134, the pattern layer 134 can be omitted. The picture layer 134 is formed using a printing ink or a paint in which a coloring agent such as a dye or a pigment is dissolved or dispersed in a suitable dilution solvent together with a suitable binder resin. The printing ink or the paint is applied by, for example, various printing methods such as a gravure printing method or an offset printing method, or various coating methods such as a gravure coating method or a roll coating method. Further, as the binder resin, for example, a urethane resin, an acrylic resin, a vinyl chloride resin, a polyimide resin, a cotton nitrate, etc., or a mixture thereof etc. can be used, but it is of course limited thereto is not. In addition, any pattern can be used as the pattern, for example, using wood grain pattern, stone grain pattern, grain pattern, abstract pattern, geometric pattern, character, symbol, single color plain color, or a combination thereof it can. Moreover, in order to improve the concealability of the decorative sheet 13, an opaque printing ink or paint concealing layer containing a large amount of opaque pigment such as titanium dioxide or iron oxide is provided between the pattern layer 134 and the base sheet 135. May be

  The adhesive layer 133 is provided as needed in order to adhere the base sheet 135 and the surface sheet 132. The adhesive layer 133 can be omitted if the adhesive properties of other layers can be used. The adhesive layer 133 is not particularly limited as to the type of adhesive used for the adhesive layer 133, but it is most desirable to use a two-component curable urethane adhesive that uses an isocyanate-based curing agent. For example, polyester polyol, polyether polyol and the like are used as the main component of the two-component curable urethane adhesive, and tolylene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate and the like are used as the curing agent. be able to.

  The primer layer 136 is applied as needed in order to improve the adhesion to the adhesive used for adhesion to the wood substrate 11. As an adhesive for the wood base 11, for example, an adhesive such as a vinyl acetate emulsion type or a two-component curable urethane type is widely used. Therefore, it is desirable for the primer layer 136 to have a resin design matched to these adhesives. For example, urethane type, acrylic type, ethylene-vinyl acetate copolymer, vinyl chloride-vinyl acetate copolymer type, polyester type, etc. can be used. In particular, a two-component curable urethane-based primer agent and the like by blending a polyester polyol and an isocyanate compound is preferable. Further, for example, the addition of inorganic powders such as silica, barium sulfate, calcium carbonate and the like is effective in preventing blocking during winding and storage and improving adhesion due to the anchoring effect.

  The embossed pattern 137 is provided as necessary in order to provide the surface of the decorative sheet 13 with a three-dimensional design. Any embossed shape may be used as the embossed pattern 137. For example, a wood grain conduit shape, a grain shape, a grain shape, an abstract pattern shape, a Japanese paper shape, a suede shape, a leather shape, a satin shape, a grain shape, a hair line Shapes, parallel straight lines, parallel curves or combinations thereof may be used. Moreover, as a method of forming the embossed pattern 137, for example, double embossing, extrusion laminating simultaneous embossing, etc., which are performed before, after or simultaneously with lamination of the surface sheet 132 on the surface 135a of the base sheet 135 it can.

(Cushion layer)
As the cushioning layer 15, for example, a resin foam can be used. As the resin foam, for example, a resin foam having many cavities on the surface or inside of the resin and in which the whole resin is formed to be porous can be used. For example, polyethylene (PE) -based foam, polyurethane (PUR) -based foam, polystyrene (PS) -based foam, and polypropylene (PP) -based foam can be used. The thickness of the cushioning layer 15 is not particularly limited, but if it is too thin, it has poor cushioning properties, and if it is too thick, the deformation of the cushioning layer 15 becomes large and the deformation of the wood substrate 11 increases when it is stepped on. It is easy to break. Therefore, for example, 0.1 mm or more and 10 mm or less is preferable, and in particular, 0.5 mm or more and 3 mm or less is most preferable.

  In addition, in the flooring 10 which concerns on embodiment of this invention, although the example which uses a resin foam as the cushion layer 15 was shown, another structure is also employable. For example, a rubber-based sheet having a thickness of 0.1 mm or more and 10 mm or less, more preferably 0.5 mm or more and 3 mm or less may be used. Examples of the rubber-based sheet include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene butadiene rubber (SBR), chloropyrene rubber (CR), butyl rubber (IIR) and urethane rubber (U). Etc. sheets can be used.

  As explained above, since the flooring 10 which concerns on embodiment of this invention has the wood base material 11 as a base material, it can construct easily also by the carpenter who constructs a flooring of wood type. Therefore, for example, by using the floor material 10 as a floor space or a sanitary floor material, to a carpenter who is enforcing a wood-based floor material such as a flooring floor at a construction site, the space floor material or sanitary floor It can also be done to carry out the material. Therefore, the number of construction workers can be reduced, and the construction cost can be reduced.

In addition, since the cushioning layer 15 is provided on the back surface 11b of the wood substrate 11, the cushioning layer 15 may be deformed according to the irregularities even when the floor material 10 is disposed on the foundation having unevenness, such as a concrete foundation. it can. Therefore, a gap can be prevented from being generated between the back surface 11 b of the wood base 11 and the base, and the back surface side of the floor material 10 can be brought into close contact with the floor surface.
Moreover, in the flooring 10 which concerns on embodiment of this invention, it is good also as a fiber board shape | molded by the urea and melamine co-condensation resin type-adhesive agent. Moreover, it is good also as a plywood which does not peel in 1 class immersion peeling test of JAS specification. Thereby, the flooring 10 which is resistant to swelling and peeling due to water wetting can be provided, and the flooring 10 can be used in a place with water wetting such as at the entrance soil.

Furthermore, in the flooring 10 according to the embodiment of the present invention, the thickness of the wood substrate 11 may be 2.0 mm or more and 4.5 mm or less. Thereby, it is possible to provide the floor material 10 having flexibility, easy fitting, and excellent in construction property, and the floor material 10 can be used in a narrow place such as the entrance soil.
Further, in the floor material 10 according to the embodiment of the present invention, the thickness of the cushion layer 15 may be 0.1 mm or more and 10 mm or less. Thereby, the deformation of the cushion layer 15 when the floor material 10 is stepped can be reduced, the deformation of the wooden base 11 can be reduced, and the cracking of the wooden base 11 can be prevented.

Furthermore, the floor material 10 according to the embodiment of the present invention may have a surface coating layer 131 provided on the surface side of the decorative sheet 13 and containing an acrylic urethane resin or an ionizing radiation curable resin. Thereby, the flooring 10 excellent in durability can be provided, and the flooring 10 can be used in a place where heavy walking is performed, such as entrance between the grounds, that is, a place where people pass frequently. In addition, it is possible to suppress the entry of water into the interior of the decorative sheet 13 from the surface 13 a side of the decorative sheet 13, and it is possible to more reliably suppress the wetting of the wood substrate 11.
Moreover, in the floor material 10 according to the embodiment of the present invention, the base sheet 135 and the surface sheet 132 of the decorative sheet 13 may be made of a polyolefin resin. Thereby, the floor material 10 of non-halogen-based material can be provided, and the influence of halogen on the environment can be prevented.

Below, the flooring 10 of the Example of this invention and a comparative example is demonstrated. The present invention is not limited to the following examples.
Example 1
First, as shown in FIG. 2, a pigmented polyethylene sheet (manufactured by Riken Technos Co., Ltd.) was prepared as the base sheet 135. The thickness of the base sheet 135 was 55 μm. Subsequently, a urethane ink (Lamister manufactured by Toyo Ink Mfg. Co., Ltd.) was applied to the prepared base sheet 135 using gravure printing to form a picture layer 134. The pattern of the pattern layer 134 was a wood grain pattern.

Subsequently, a film of homopolypropylene resin (manufactured by Prime Polymer Co., Ltd.) was provided on the surface of the formed pattern layer 134 using an extrusion laminating method to form a surface sheet 132 (polypropylene clear layer). In Example 1, the adhesive layer 133 of FIG. 2 is omitted.
Subsequently, a thermosetting resin (acrylic urethane resin manufactured by DIC Graphics, Inc.) was applied to the surface 132 a of the surface sheet 132. The thickness of the thermosetting resin was 9 μm. Subsequently, an ultraviolet curable resin (urethane acrylate resin manufactured by DIC Graphics, Inc.) was applied onto the thermosetting resin. The thickness of the ultraviolet curable resin was 5 μm. Subsequently, ultraviolet irradiation was performed using a metal halide lamp to cure the ultraviolet curable resin, thereby forming the surface coating layer 131.

Subsequently, the adhesive was applied to the surface 11 a of the wood substrate 11 in a wet state. Subsequently, the decorative sheet 13 was attached to the surface 11 a of the wood substrate 11 with the coated adhesive. Then I was cured for 24 hours. As the wood base 11, MDF molded with a urea-melamine co-condensation resin adhesive, that is, a fiber board was used. As the MDF, one having M type of division by the adhesive defined in JIS A5905 was used. The thickness of the wood substrate 11 was 2.5 mm.
Subsequently, a two-component aqueous emulsion adhesive was applied to the back surface 11 b of the wood substrate 11. Subsequently, the cushion layer 15 was attached to the back surface 11b of the wood substrate 11 with the two-component aqueous emulsion adhesive applied. As the cushion layer 15, a foamed polyethylene cushion (manufactured by Sanfuku Kogyo Co., Ltd.) was used. The thickness of the cushioning layer 15 was 2.0 mm.
In Example 1, the floor material 10 for the entrance dirt was produced by the above procedure.

(Example 2)
In Example 2, the plywood classified into 1 class plywood in JAS standard was used as the wood base material 11. The floor material 10 was produced by the same material and procedure as Example 1 except it.

(Comparative example 1)
In Comparative Example 1, an MDF was used as the wood substrate 11 and was molded with a urea-based adhesive, and the division by the adhesive specified in JIS A5905 was U-type. The floor material 10 was produced by the same material and procedure as Example 1 except it.
(Comparative example 2)
In the comparative example 2, the plywood classified into 2 class plywood in JAS specification was used as the wood substrate 11. The floor material 10 was produced by the same material and procedure as Example 1 except it.

(Comparative example 3)
In Comparative Example 3, the thickness of the wood substrate 11 was 6 mm. The floor material 10 was produced by the same material and procedure as Example 2 except it.
(Comparative example 4)
In Comparative Example 4, the wood substrate 11 used in Example 1 was subjected to comb groove processing so that the remaining thickness was 1 mm. The floor material 10 was produced by the same material and procedure as Example 1 except it.
(Comparative example 5)
In Comparative Example 5, the cushioning layer 15 is omitted. The floor material 10 was produced by the same material and procedure as Example 1 except it.

(Performance evaluation)
With respect to the floor materials 10 of Examples 1 to 2 and Comparative Examples 1 to 5, evaluations of workability, non-trackability, and water resistance were performed.
(Constructability)
The thing which the floor material 10 does not bend at the time of construction, and the thing which the floor material 10 cracked was made into rejection "x", and what was able to be built without a problem was made into pass "(circle)".
(Non-trackability)
The floor material 10 was bonded to the self-leveling soil mortar base material, and the appearance was visually observed and evaluated. The thing which had unevenness was made into rejection "x", and the thing which had no unevenness was made pass (○).

(water resistant)
It was evaluated by the JAS 1 class immersion test. The thing which had base material peeling and base material swelling was made into rejection "x", and the thing which there was no reference peeling and base material swelling was made into pass "(circle)".
(Evaluation results)
The evaluation results are shown in Table 1. Although the column of "judgment" was provided in Table 1, in the column of "judgment", those with "x" in which any of construction property, non-slip following property, and water resistance had a failure "x" It marked, and "○" was written on what the construction property, non-slip following property, and water resistance were all pass "○".

As shown in Table 1, in the case of the floor materials 10 of Examples 1 to 2, all of the workability, the non-sliding followability, and the water resistance were the acceptance "○", and the judgment was the acceptance "○". On the other hand, since the flooring 10 of Comparative Examples 1-5 had rejection "x" in construction property, inland following property, and water resistance either, determination became rejection "x."
Specifically, since the floor material 10 of Comparative Example 1 is a U-type, that is, a type having a lower water resistance than the M-type, the section of the wood base 11 by the adhesive defined in JIS A5905 is wood-based. The material 11 swelled due to water wetting, and the water resistance was rejected “x”. Further, since the floor material 10 of Comparative Example 2 is a plywood divided into two types of plywood in the JAS standard, that is, a plywood having a low durability of the adhesive due to water wetting, the wood substrate 11 is cracked by water wetting, The water resistance was rejected “x”.

  On the other hand, in the floor material 10 of Example 1, the section by the adhesive agent which is molded with urea-melamine co-condensation resin adhesive as wood base 11 and specified in JIS A5905 is M type MDF, that is, water resistance The water resistance was evaluated as "O" because the base material having high properties was used. Moreover, in the floor material 10 of Example 2, since the plywood which is classified into 1 class plywood in JAS standard, that is, the base material having high durability of the adhesive is used as the wood base 11, the water resistance passes. It became ".

Moreover, since the wooden base material 11 is 6 mm and the flooring material 10 of the comparative example 3 is 6 mm and is thick, the flooring material 10 does not bend at the time of construction, but construction property became rejection "x". Moreover, since the floor material 10 of the comparative example 4 was given the remaining thickness of 1 mm to the wood substrate 11 and the comb-teeth processing was performed, the wood substrate 11 was cracked and the workability became “x”.
On the other hand, since the floor material 10 of Examples 1 and 2 sets the thickness of the wood substrate 11 to a range of 2.5 mm, that is, 2.0 mm or more and 4.5 mm or less and not too thin or too thick, the workability is improved. It became a pass "○".

Furthermore, in the floor material 10 of Comparative Example 5, since the cushion layer 15 is omitted, irregularities are generated in accordance with the surface irregularities of the ground mortar base material and noise is generated. It became.
On the other hand, in the floor materials 10 of Examples 1 and 2, since the cushion layer 15 is provided on the back surface 11b of the wood base 11, the unevenness following the soil base is not affected by the surface unevenness of the mortar base for soiling. It became "".
Therefore, it was confirmed that floor materials 10 of Examples 1-2 are good in construction nature, non-slip following property, and water resistance rather than floorings 10 of comparative examples 1-5.

  DESCRIPTION OF SYMBOLS 10 ... Floor material, 11 ... Wood base material, 11a ... Surface, 11b ... Back surface, 13 ... Cosmetic sheet, 13a ... Surface, 15 ... Cushion layer, 131 ... Surface coat layer, 131a ... Surface, 131b ... Back surface, 132 ... Surface Sheet, 132a: Surface, 132b: Back surface, 133: Adhesive layer, 134: Pattern layer, 135: Base sheet, 135a: Surface, 135b: Back surface, 136: Primer layer, 137: Embossed pattern

Claims (7)

Woody base material,
A decorative sheet provided on the surface side of the wood substrate;
A floor material comprising: a cushion layer provided on the back side of the wood base material.   The floor material according to claim 1, wherein the wood base material is a fiber board molded by a urea-melamine co-condensation resin adhesive.   The floor material according to claim 1 or 2, wherein the wood base material is plywood without peeling in a JAS standard 1 type immersion peeling test.   The floor material according to any one of claims 1 to 3, wherein the thickness of the wood base material is 2.0 mm or more and 4.5 mm or less.   The floor material according to claim 4, wherein a thickness of the cushion layer is 0.1 mm or more and 10 mm or less.   The floor material according to any one of claims 1 to 5, further comprising a surface coating layer provided on the surface side of the decorative sheet, the layer comprising an acrylic urethane resin or an ionizing radiation curable resin. The decorative sheet has a base material sheet and a surface sheet provided on the surface side of the base material sheet,
The floor material according to any one of claims 1 to 6, wherein the base sheet and the surface sheet are made of a polyolefin resin.

Images