JP6587374B2 - Flooring - Google Patents

Description

  The present invention relates to a flooring material used for a floor surface of a house, a store, an office, a gymnasium, and the like, and more specifically, has a groove portion by V-shaped or C-surface processing from the floor material surface, and changes the color inside and outside the groove portion. It relates to flooring that does not feel strange.

  Conventionally, floor materials in which a decorative sheet is attached to a woody base material such as plywood, particle board, and medium density fiberboard (MDF) are used for floor surfaces of houses and the like. Then, in consideration of impact absorption on the surface as a flooring material, caster resistance, falling ball dents, and the like, a backer sheet made of a hard resin and having a certain thickness is appropriately provided on the back surface of the decorative sheet. In addition, the surface of these flooring materials is often used because it is excellent in design properties, such as V-shaped groove processing or the like, or chamfering corner portions.

  However, these processes are usually performed with a cutting machine or the like after a decorative sheet is attached to the surface of the wooden base material. Therefore, the color pattern is uncomfortable on the surface of the backer sheet that appears after processing. In that case, it becomes necessary to perform color adjustment such as applying a transparent or colored paint on the surface or attaching a decorative sheet separately.

Patent 4815652

  This invention is made in order to solve such a problem, and the place made into the subject is giving groove processing etc., such as V shape after attaching a decorative sheet, or chamfering a corner | angular part. It is to provide a flooring that does not have a sense of incongruity in the color pattern and does not require a separate process.

The present invention solves this problem, that is, the invention according to claim 1 is a flooring material in which a colored backer layer, a colored raw fabric layer, and a printed layer are provided on a wooden base material at least in this order. The colored backer layer is made of amorphous polyethylene terephthalate, the thickness of the colored backer layer is 0.250 to 0.600 mm, and the thickness of the colored raw fabric layer is 0.040 to 0. The groove part in which the deepest part is located in the colored backer layer from the surface side of the flooring is formed into a V shape having an angle of 80 to 100 degrees and a width of 1.0 to 2.0 mm, and a cross section of the flooring The ratio between the length of the colored raw fabric layer on the groove inner surface and the length of the colored backing layer on the inner surface of the groove in the cross section of the floor material from the colored raw fabric layer side to the deepest portion of the groove portion is 1: 4 or more Yes, the colored bar Is a flooring which is characterized in that the color difference of the car layer and the colored raw layers △ E is within 5.

  According to the first aspect of the present invention, even if the corner portion is chamfered, the colored raw fabric layer 3 is conspicuous even when viewed from the floor surface side if it is a normal groove processing. Without any sense of incongruity in the color pattern, there is an effect that a separate process is not required.

  In addition, according to the second aspect of the present invention, there is an effect that the color pattern is more uncomfortable.

It is explanatory drawing which shows the structure of the cross section of one Example of the flooring of this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of an embodiment of the flooring of the present invention. A colored backer layer 2, a colored raw fabric layer 3, and a printed layer 4 are provided on a woody substrate 1, and a groove portion 5 is provided.

  As the woody base material 1 in the present invention, southern plywood, softwood 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.

  As a material used for the colored backer layer 2 in the present invention, a sheet made of a hard resin is preferable in consideration of caster resistance, falling ball dents, and the like. For example, polyethylene terephthalate, highly heat-resistant polyalkylene terephthalate [for example, polyethylene terephthalate in which a part of ethylene glycol is substituted with 1,4-cyclohexanedimethanol, diethylene glycol or the like, so-called trade name PET-G (manufactured by Eastman Chemical Company) )], Polyester resins such as polybutylene terephthalate, polycarbonate, polyarylate, and the like. These resins may be used alone or as a mixture. In particular, non-crystalline polyethylene terephthalate is suitable because it is a general-purpose resin, is easy to form a film, is inexpensive, and has transparency and is easy to mix colors. Specific examples include those commercially available as “NOVA CLEAR” manufactured by Mitsubishi Chemical Corporation, “A-PET sheet” manufactured by Polytech Co., Ltd., and the like.

  The colored backer layer 2 in the present invention is appropriately colored and has a concealing effect on the woody base material 1 and has a color that does not feel uncomfortable with the colored raw fabric layer 3 and the printing layer 4 described later. . Specifically, the color difference ΔE with the colored raw fabric layer 3 is preferably 5 or less. Although the same color is preferable, since the resin used for the colored backer layer 2 and its role are different from those of the colored original fabric layer 3 described later, it is difficult to achieve the same color. In order to color the colored backer layer 2 in a desired color tone, a colorant such as an inorganic pigment or an organic pigment may be added. In addition, various additives such as an ultraviolet absorber, a light stabilizer, an antioxidant, an internal mold release agent, an antistatic agent, and an antibacterial agent may be appropriately added as necessary.

  The colored backer layer 2 in the present invention contributes to the role of coloring the groove 5 described later and the caster resistance performance as a flooring. In order to exhibit castor resistance performance as a flooring material, the thickness of the colored backer layer 2 is desirably 0.200 mm or more, and preferably 0.250 to 0.600 mm.

  The colored raw fabric layer 3 in the present invention is not particularly limited as long as it is made of a material having printability for providing the printing layer 4 described later, but gravure printing capable of printing in large quantities is used. In this case, a thickness of 0.040 to 0.080 mm is preferable.

  The colored raw fabric layer 3 in the present invention is appropriately colored, and is colored as a base of the printing layer 4 described later, and has a color with no discomfort with the colored backer layer 2 or the printing layer 4 described later. Use one. Specifically, the color difference ΔE with the colored backer layer 2 is preferably 5 or less. Although the same color is preferable, since the resin used for the colored raw fabric layer 3 and its role are different from those of the colored backer layer 2, it is difficult to achieve the same color.

  As the printing layer 4 in the present invention, a pattern wrinkle-like pattern is provided on the colored original fabric layer 3 by printing, and is not particularly limited. Those with more 3 appear are more excellent as expressing the effects of the present invention. Specifically, it is a wood grain pattern, and the one in which the wood grain conduit portion is printed with a pattern-like pattern is suitable.

  In the present invention, when the groove 5 is viewed from the surface side, the length of the colored backer layer 2 is the main color (generally the colored backer layer 2 is thicker than the colored original fabric layer 3). Unless the thickness of the colored raw fabric layer 3 is set so as not to interfere, the groove 5 appears to be a two-tone color. As the groove portion 5, a V-shaped groove is usually used and is not particularly defined, but an angle: 80 to 100 degrees and a width: 1.0 to 2.0 mm are common.

  If the thickness of the colored raw fabric layer 3 in the cross section of the groove portion 5 in the present invention is 120 μm or less (the length of the colored backer layer 2 is 480 μm or more), it looks like a two-tone color even when the groove portion 5 is viewed in a sitting state. Absent. Infinitely thin colored raw fabric layer 3 and backer layer 2 will not be visible in the two-tone color, but since the deepest portion of groove 5 is provided in the backer, the function as a backer is lost because it is too thin. . For further improvement, it is preferable to make the color difference between the colored backer layer 2 and the colored raw fabric layer 3 in the V-groove closer. Specifically, if the color difference ΔE is within 5, the effect is sufficiently exhibited. It becomes.

  In the flooring of the present invention, a transparent resin layer, a transparent surface protective layer, and the like may be appropriately provided on the printing layer 4 (not shown). Moreover, in order to improve the adhesiveness of each layer, surface treatment may be performed before bonding of each layer, or an adhesive layer may be provided. (Not shown)

<Creation of sheet for flooring>
A 0.070 mm thick polyethylene resin sheet (manufactured by Riken Technos Co., Ltd .: “RIVEST TPO”) was used as the colored raw fabric layer 3, and a wood grain pattern was printed on the gravure ink made of a two-component urethane resin binder resin. A printing layer 4 was obtained. A transparent polypropylene resin 0.090 mm was extruded and laminated thereon with a thickness, and an ultraviolet curable coating was applied as a surface protective layer thereon at 10 g / m ² and cured. Finally, a non-crystalline polyethylene terephthalate sheet having a thickness of 0.500 mm was used as the colored backer layer 2, and a two-component urethane resin adhesive ("TM-593" manufactured by Toyo Morton Co., Ltd.) was dried on the surface thereof. The coating was applied so that the coating amount was 10 g / m ² and bonded to the back surface of the colored raw fabric layer 3 by a dry lamination method to prepare a sheet for flooring having a thickness of 0.680 mm.

<Create flooring>
Lauan plywood (thickness 12 mm) is used as the wood base material 1 on the back surface of the colored backer layer 2 of the flooring sheet, and this is laminated with a water-soluble emulsion adhesive to a predetermined size (303 mm × 1818 mm). After cutting, actual processing of four sides was performed using a tenor, and a V-shaped groove having a depth reaching the colored backer layer 2 from the surface side was formed to form a groove portion 5. Further, a chamfered portion having the same angle as the V-shaped groove was formed on the side surface portion (real portion) of the flooring.

<Details of groove>
The groove portion had a groove width of 1 mm when viewed from the floor material flat portion, and the V-shaped groove angle was 90 degrees. The depth of the groove was 0.500 mm at the deepest part. The length ratio of the colored original fabric layer and the colored backer layer 2 in the V groove was 7:32. The original fabric color was determined so that the color difference ΔE between the colored original fabric layer 3 and the colored backer layer 2 was set to 10.

  A flooring was prepared in the same manner as in Example 1 except that the color difference ΔE between the colored raw fabric layer 3 and the colored backer layer 2 was set to 3.

<Comparative Example 1>
A flooring was prepared in the same manner as in Example 1 except that the colored raw fabric layer 3 was made 0.140 mm thick. The length ratio of the V groove was 14:25.

<Comparative example 2>
A flooring was prepared in the same manner as in Example 2 except that the colored raw fabric layer 3 was 0.140 mm in thickness.

<Evaluation>
Color blurring was visually evaluated for Examples 1 and 2 and Comparative Examples 1 and 2 produced above.
The evaluation method evaluated by seeing a groove part from the position where 10 persons sat on the flooring.
A: All members looked one color.
○: One to two people There were people who looked two colors.
Δ: 4 to 5 people There were people who looked two colors.
X: 8 or more people were seen in two colors.

  The flooring of the present invention can be used as a flooring used for floors of houses, stores, offices, gymnasiums and the like.

DESCRIPTION OF SYMBOLS 1 ... Wood type base material 2 ... Colored backer layer 3 ... Colored original fabric layer 4 ... Printed layer 5 ... Groove part

Claims (1)

The flooring formed by providing a colored backer layer on a wood-based substrate and colored raw layer printed layer at least in this order, the colored backer layer is a non-crystalline polyethylene terephthalate and the material, One or the colored The thickness of the backer layer is 0.250 to 0.600 mm, the thickness of the colored original fabric layer is 0.040 to 0.080 mm, and the deepest portion from the surface side of the flooring is located in the colored backer layer The groove portion to be formed is V-shaped with an angle of 80 to 100 degrees and a width of 1.0 to 2.0 mm, and the length of the colored raw fabric layer on the inner surface of the groove in the cross section of the floor material, ratio of the length from the colored raw layer side of the colored backer layer to the deepest of the groove portion of the surface is 1: 4 or more, the color difference of the colored backer layer and the colored raw layers △ E is 5 within A flooring characterized by that.

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