JP2020063643A - Woody grained floor material and floor surface structure - Google Patents

Abstract

To provide a woody grained floor material excellent in skid-proof capacity and cleanability.SOLUTION: A woody grained floor material 1 has a plurality of projection rows with woody grained streak shape and is mainly composed of a resin. The projection rows are constituted with a plurality of projection parts 5 intermittently formed while having discontinued parts 61 in a woody grained flow direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a flooring material having a wood grain appearance and a floor surface structure laid with the flooring material.

Heretofore, there has been known a floor material that reproduces a wood grain pattern of natural wood instead of solid wood.
It is known that such a wood grain flooring material has a three-dimensional appearance in a wood grain pattern by forming irregularities on the surface. For example, in Patent Document 1, in a building board in which a pattern printing sheet having a pattern printed on the surface of a base material is attached, the pattern of the pattern printing sheet has high abrasion resistance and low abrasion resistance. There is disclosed a building board in which an ink portion having low wear resistance is appropriately worn and removed by a brush or the like while being formed with ink to form a woodgrain-like uneven pattern on the surface of the pattern printing sheet. In such a building board, the convex portion forms the flow pattern of the grain of the wood grain.

JP, 2013-234540, A

However, in the building board of Patent Document 1, since the convex portions are long convex portions that are continuous in the flow direction, dust easily collects between the long convex portions (that is, concave portions), and the dust is cleaned. Is difficult. In particular, when wood flooring is laid on the floor surface outdoors or semi-outdoors, when cleaning the surface of the wood flooring with a broom, such wood flooring may cause dust to Is difficult to sweep out, and in particular, it is difficult to sweep out in a direction orthogonal to the flow direction of the elongated convex portion.
On the other hand, if the protruding height of the elongated convex portion is made as small as possible, cleaning becomes easy, but the three-dimensional effect of the wood grain disappears.

  An object of the present invention is to provide a wood grain flooring material excellent in cleanability and a floor surface structure laid with it.

  The present invention is a wood grain flooring material having a plurality of convex rows forming a grain shape of a wood grain, which is mainly made of resin, wherein the convex row has intermittent portions in the flow direction of the wood grain and has a discontinuous portion. It is composed of a plurality of convex portions formed in.

The preferred wood grain flooring material of the present invention is such that the plurality of convex rows are juxtaposed in the width direction which is a direction substantially orthogonal to the flow direction of the wood grain, and one of a plurality of discontinuous portions of adjacent convex rows in the width direction. Part or all is said to be uneven in the width direction.
Preferred wood grain flooring material of the present invention, a part or all of the plurality of convex portions constituting the convex row, a large protruding portion mountain portion, and a valley portion having a smaller protruding height than the mountain portion, Have.
Preferred wood grain flooring material of the present invention is a part or all of the plurality of convex portions constituting the convex row, in a plan view, a narrow portion, and a wide portion having a width larger than the narrow portion, Have.

According to another aspect of the present invention, a floor structure is provided.
The floor surface structure of the present invention has an indoor floor surface on which a flooring material having a wood grain pattern is laid, and an outdoor or semi-outdoor floor surface adjacent to the indoor floor surface. A floor covering is laid on the outdoor or semi-outdoor floor so that the flow direction of the grain matches the floor laid on the indoor floor.

  Since the wood-grain flooring material of the present invention is excellent in cleanability, it can be cleanly cleaned and the cleaning work can be shortened.

The top view of the woodgrain flooring material of this invention. Sectional drawing cut | disconnected by the II-II line of FIG. The top view which expanded and represented the square III section of FIG. 1 typically (The typical top view which expanded and showed the convex line of the surface of the wood flooring material). FIG. 4 is a plan view further enlarging and schematically showing the circled part IV of FIG. 3. FIG. 5 is an end view taken along the line VV of FIG. 4. The end view is a view showing only the cut surface. The end view cut | disconnected by the VI-VI line of FIG. The end view cut | disconnected by the VII-VII line of FIG. The top view of the floor surface structure of this invention. The reference top view for explaining the situation at the time of cleaning the surface of the grain flooring material of the present invention. The photograph figure of the surface of the wood flooring material produced in the Example.

Hereinafter, the present invention will be described with reference to the drawings as appropriate.
In the present specification, the "front surface" of a layer refers to the surface far from the floor surface on which the woodgrain flooring is laid, and the "rear surface" is the opposite side (side closer to the floor surface on which the flooring material is laid). Refers to the face.
In the present specification, the numerical range represented by "to" means a numerical range including the numerical values before and after "to" as the lower limit value and the upper limit value. When a plurality of lower limit values and a plurality of upper limit values are described separately, it is possible to select any lower limit value and any upper limit value and set them as ranges bounded by “to”.
It should be noted that dimensions such as thickness and size in each drawing are different from actual ones.

[Overview of wood flooring]
FIG. 1 is a plan view of a wood grain flooring material 1 of the present invention, and FIG. 2 is a sectional view thereof. However, in FIG. 1 and FIG. 2, the convex rows formed on the surface of the wood grain floor covering 1 are not shown.
As shown in FIG. 1, the wood grain floor covering 1 is formed in a long strip shape in plan view. In the present specification, the long strip is a rectangular shape whose length in the longitudinal direction is sufficiently longer than its length in the latitudinal direction, and for example, the length in the longitudinal direction is 2 in the latitudinal direction. It is at least twice, preferably at least four times. The long strip-shaped woodgrain flooring material 1 is usually wound on a roll and provided for storage / transportation, and cut into a desired shape at a construction site for use. However, the wood-grain flooring material 1 of the present invention is not limited to a long strip-shaped sheet, and may be a so-called tile shape formed in a sheet shape such as a square shape in plan view (not shown).

  The long strip-shaped woodgrain flooring material 1 is formed to have a predetermined width with a predetermined width such as 800 mm to 4000 mm, for example, and a longitudinal length of 2 m. ~ 300 m. The wood grain flooring material 1 formed in a leaf shape has, for example, 100 mm to 4000 mm in length and width. The sheet-like wood-grain flooring material 1 is generally a square shape with a side length of 50 cm in a plan view, but may be a rectangular shape with a length of 10 cm and a width of 90 cm, or a hexagonal shape. There is no particular limitation.

The wood-grain flooring material 1 of the present invention is mainly composed of a resin such as a thermoplastic resin, and preferably has flexibility. For example, the wood-grain flooring material 1 of the present invention is flexible enough to be wound in a roll around a core material having a diameter of 15 cm. However, the wood grain floor material 1 of the present invention may be relatively hard without having flexibility.
The thickness of the woodgrain flooring material 1 of the present invention can be appropriately set, but is, for example, 1.5 mm to 5 mm, preferably 2 mm to 4 mm. In addition, the said thickness means the maximum thickness of the flooring material 1 (thickness of the part in which the peak part of a convex part was formed).

[Layer composition of wood flooring]
The layer structure of the woodgrain flooring material 1 of the present invention is not particularly limited, but for example, as shown in FIG. 2, it has a surface resin layer 2 and a main body layer 4 in order from the surface side, and preferably, It has a surface resin layer 2, a decorative layer 3, and a main body layer 4 in this order from the front surface side.
A protective layer (not shown) may be formed on the surface of the surface resin layer 2 if necessary.

The surface resin layer 2 is a layer in which a convex row composed of a plurality of convex portions is exposed. The convex row will be described later.
The surface resin layer 2 may be foamed or may not be foamed. It is preferable that the surface resin layer 2 is a non-foamed non-foamed material, because it allows the appearance of a clean grain pattern.
The surface resin layer 2 may be transparent (colorless transparent or colored transparent) or opaque. When the decorative layer 3 is provided on the back surface side, the surface resin layer 2 is preferably transparent, and more preferably colorless and transparent so that the decorative layer 3 can be seen through.

The surface resin layer 2 is a vinyl chloride resin such as vinyl chloride or vinyl chloride-vinyl acetate copolymer; a polyolefin resin; a urethane resin; a vinyl acetate resin such as an ethylene-vinyl acetate copolymer; an ethylene-methacrylate resin. Acrylic resin such as; polyamide resin; ester resin; thermoplastic resin such as various elastomers such as olefin elastomer and styrene elastomer. These may be used alone or in combination of two or more. The surface resin layer 2 is preferably formed of a resin containing a vinyl chloride resin as a main component because it is firmly bonded to the decorative layer 3. The vinyl chloride resin may be a paste vinyl chloride resin, a suspension vinyl chloride resin, or a mixture thereof.
The thickness of the surface resin layer 2 is not particularly limited and is, for example, 0.1 mm to 1 mm, preferably 0.15 mm to 0.5 mm. In addition, the said thickness means the maximum thickness of the surface resin layer 2 (thickness of the part in which the peak part of the convex part was formed).

  When the protective layer is formed on the surface of the surface resin layer 2, the protective layer forms the outermost surface of the wood grain floor material 1, and imparts wear resistance and scratch resistance to the wood grain floor material 1. The protective layer may be transparent or opaque, but in order to allow the design of the decorative layer 3 to be seen through, it is preferably transparent, and more preferably colorless and transparent. The protective layer is formed of, for example, an ionizing radiation curable resin such as an ultraviolet curable resin, a thermosetting resin, a resin curable by non-ionizing radiation, or the like. The thickness of the protective layer is not particularly limited, but is, for example, 1 μm to 100 μm, preferably 10 μm to 50 μm.

The decorative layer 3 is a layer that imparts a design to the wood flooring 1. As the decorative layer 3, a design that allows the appearance of a wood grain pattern in combination with a convex row described later is adopted. The pattern of the printed layer 3 may or may not completely match the streak shape of the convex row.
Examples of the decorative layer 3 include a design print sheet, a thermoplastic resin layer having a design property, and a transfer layer. However, the decorative layer 3 is not limited to these exemplified layers, and any other layer can be used as long as it can represent the design.

The design print sheet is a sheet that has been design-printed in advance, and for example, a vinyl chloride resin sheet that has been design-printed or the like can be used. Examples of the design printing include gravure printing and rotary printing. The rotary printing is particularly preferable because it is printed by using an ink in which a pigment is added to a paste-like vinyl chloride resin, and thus has excellent weather resistance. The thermoplastic resin layer to which the design property is imparted is a layer which itself can be a design, for example, a layer to which the design property is imparted by the color of the resin mixed with the colorant and the mixing method, and the resin chip are mixed. Examples of the resin layer include a layer having a design property depending on the color, shape, and dispersion method of the resin chip. The transfer layer is composed of a transfer film formed by printing a printing ink on a base material such as a release paper and solidifying the printing ink, and then peeling the solidified printing ink.
The thickness of the decorative layer 3 is not particularly limited, but is, for example, 0.05 mm to 1 mm, preferably 0.1 mm to 0.5 mm.

The body layer 4 has a fiber reinforcing layer 41 and a back surface resin layer 42.
The fiber reinforcing layer 41 is a layer for suppressing dimensional changes of the wood grain floor covering 1 due to shrinkage and expansion over time.
Examples of the fiber reinforcing layer 41 include a nonwoven fabric containing fibers, a woven fabric in which fibers are woven or knitted, and the like. The fibers are not particularly limited, and examples thereof include inorganic fibers such as glass fibers and carbon fibers, rigid fibers such as polyester fibers, and natural fibers such as wool and cotton. The fiber reinforcing layer 41 is preferably made of a glass non-woven fabric containing glass fibers or a woven glass fabric containing glass fibers, and more preferably a glass non-woven fabric, because the fiber reinforcing layer 41 has high strength and little dimensional variation due to temperature.

The fiber reinforcing layer 41 is preferably impregnated with a bonding resin. The bonding resin is for adhering the fiber reinforcing layer 41 laminated between the back surface resin layer 42 and the front surface resin layer 2 (the decorative layer 3 when the decorative layer 3 is provided) to these layers 42, 3. It is provided in.
The bonding resin is not particularly limited as long as it can bond to any of the fiber reinforcing layer 41, the back surface resin layer 42, and the front surface resin layer 2 (or the decorative layer 3), and a conventionally known resin can be used. Examples of the bonding resin include the thermoplastic resins exemplified in the surface resin layer 2, and among them, a resin containing a vinyl chloride resin as a main component is preferable, and a resin containing a paste vinyl chloride resin as a main component is more preferable. .
The thickness of the fiber reinforcing layer 41 containing the bonding resin is not particularly limited, and is, for example, 0.1 mm to 1 mm, and preferably 0.2 mm to 0.5 mm.

  The back surface resin layer 42 is a layer that constitutes the strength and weight of the wood flooring 1. The back surface resin layer 42 may or may not be foamed. When the back surface resin layer 42 is a foamed resin layer, cushioning properties can be imparted to the wood grain floor covering 1, and the weight of the wood grain floor covering 1 can be reduced. When the back surface resin layer 42 is a non-foamed resin layer, the strength of the woodgrain flooring material 1 is increased and the dynamic load resistance and the like are excellent. Examples of the material for forming the back surface resin layer 42 include the thermoplastic resins exemplified for the surface resin layer 2, and among them, a resin containing a vinyl chloride resin as a main component is preferable. The vinyl chloride resin may be a paste vinyl chloride resin, a suspension vinyl chloride resin, or a mixture thereof. The back surface resin layer 42 can be produced by a conventionally known method such as a calendar method or an extrusion method.

When a foamed resin layer is used as the back surface resin layer 42, the expansion ratio is not particularly limited, but if it is too small, cushioning properties cannot be imparted, and if it is too large, the subsidence becomes too large. Double is preferable, and 1.2 to 2 is more preferable.
If necessary, the back surface of the back surface resin layer 42 may be embossed (not shown).
The thickness of the back surface resin layer 42 is not particularly limited, but is, for example, 0.5 mm to 4 mm, preferably 1 mm to 3 mm.

  The main body layer 4 is not limited to a layer structure having one fiber reinforcement layer 41 and one back resin layer 42, and may have, for example, two or more fiber reinforcement layers, or It may have two or more foamed or non-foamed resin layers (not shown). Further, a backing layer made of rubber, felt or the like may be further provided on the outermost surface of the main body layer 4 (not shown).

[Stripe shape of wood flooring]
FIG. 3 is an enlarged and schematic plan view showing a plurality of convex rows formed on the surface of the wood-grain flooring material 1 of the present invention, and FIG. 4 is a further view of the circled portion IV of FIG. It is an expansion schematic plan view. 5 and 6 are end views (one end view of the line VV in FIG. 4 and one end view of the line VI-VI in FIG. 4) when one convex row is longitudinally cut along the flow direction of the grain. 7 is an end view (an end view taken along the line VII-VII of FIG. 4) when the plurality of convex rows are crossed along the width direction.
In an actual product, not only the thickness of the surface resin layer 2 but also the thickness of the decorative layer 3 changes depending on the unevenness (the convex portion 5 and the concave portion 62, etc.) formed on the surface of the surface resin layer 2. Note that in the end views of FIGS. 7A to 7C, the decorative layer 3 is represented by a uniform thickness for convenience.

In FIGS. 3 and 4, the wood grain floor covering 1 of the present invention has a plurality of convex rows that form the grain shape of the wood grain. The said convex row is comprised from the some convex part 5 which has the interruption | interruption part 61 and was formed intermittently in the flow direction of a grain.
Specifically, one convex line is composed of a set of a plurality of convex portions 5 which are intermittently formed in the flow direction of the grain. When viewed macroscopically, one convex row represents one streak of wood grain. The arrow shown in FIG. 3 indicates one convex row.
Here, the flow direction of the grain means the direction in which the autumn wood portion of the reproduced natural wood extends, and does not necessarily mean the linear directionality, but the direction in which the line corresponding to the reproduced autumn wood portion extends. means. The width direction is a direction substantially orthogonal to the flow direction of the wood grain. The autumn wood part is a part that constitutes an annual ring of natural wood, and is a dark-colored and hard part, and the spring member is a light-colored and soft part. In FIGS. 3 and 4, the horizontal direction of the paper surface is the flow direction, and the vertical direction of the paper surface is the width direction.

Since the wood-grain flooring material 1 of the present invention has an appearance similar to that of natural wood, each of the convex rows that reproduce the autumn wood portion is gently inclined or curved as a whole in a plan view.
In FIG. 1, the flow direction of the wood grain is substantially along the lateral direction of the long strip-shaped wood grain floor covering 1. However, the flow direction of the wood grain may be substantially along the longitudinal direction of the long strip-shaped wood floor covering 1, or may be substantially along the direction intersecting the longitudinal direction of the wood floor covering 1 at an acute angle. .

The convex rows are arranged in parallel in the width direction. By forming the plurality of convex rows, the streak shape of the wood grain is exposed on the surface of the wood grain floor covering 1. As a result, the grip force on the sole is increased, and the slip resistance, particularly in the width direction, can be improved.
The plurality of convex portions 5 forming the convex row are intermittently formed in the flow direction of the grain. In other words, a discontinuity 61 is formed between the adjacent protrusions 5 and 5 in the flow direction of the grain. As a result, the grip force on the sole is increased, and the slip resistance particularly in the flow direction can be enhanced.

Further, in the plurality of convex rows arranged in the width direction, the concave portions 62 are formed between the convex rows adjacent to each other in the width direction.
The discontinuity 61 is a recess formed between the protrusions 5 and 5 in the flow direction of the wood grain, and the recess 62 is a recess formed between the protrusions 5 and 5 in the width direction. It is preferable that the discontinuity portion 61 and the recess portion 62 are on the same plane because the cleaning property is improved.
As shown by the arrows in FIG. 3, the respective convex rows are not evenly arranged in the width direction, and have areas where the convex rows are dense and areas where the convex rows are coarse. In the region where the convex rows are rough, the concave portions 62 occupy a relatively large area.
The unevenness is determined by the relative relationship between the concave and the convex, and the convex portion 5 is a portion protruding toward the front surface side with the concave portion 62 and the interrupted portion 61 as a reference. In FIGS. 3 and 4, the contour of the convex portion 5 in plan view (that is, the shape of the convex portion 5 in plan view) is shown by a clear solid line, but in the actual product, the convex portion 5 and the discontinuity portion 61, It should be noted that the height of the concave and convex portions of the concave portion 62 changes continuously. The convex portion 5 preferably has rounded corners (cornered) in a cross-sectional view. As a result, fine particles such as dust easily get over the convex portion 5, and the cleaning property is improved.

The plurality of discontinuities 61 of the adjacent convex rows in the width direction may be all aligned in the width direction, but some of the plurality of discontinuities 61 of the adjacent convex rows in the width direction are not uniform in the width direction. It is preferable that The fact that the discontinuities 61 of the adjacent convex rows are aligned in the width direction means that the discontinuities 61 of the adjacent convex rows are located on the extension line in the width direction of the discontinuities 61 of one convex row. Say. That the discontinuities 61 of the adjacent convex rows are not uniform in the width direction means that the discontinuities 61 of the adjacent convex rows are not located on the extension line in the width direction of the discontinuities 61 of one convex row.
If the discontinuities 61 are not uniform in the width direction, sweeping in the width direction with a cleaning tool such as a broom at the time of cleaning causes particles such as dust and sand to move while swinging in the width direction, so that a wide range is covered at once. Can be cleaned. Moreover, when the cutouts 61 are uneven in the width direction, the cutouts 61 have excellent anti-slip properties in the widthwise direction, and when viewed macroscopically, the cutouts 61 are less noticeable, and have a grain appearance that is closer to that of natural wood. The flooring material 1 can be provided. On the other hand, when the discontinuities 61 are aligned in the width direction, the particles are efficiently moved in the width direction and removed by sweeping in the width direction with a cleaning tool such as a broom during cleaning.

In the case where the discontinuities 61 of the adjacent convex rows are uneven, (1) all of the discontinuities 61 of the adjacent convex rows in the width direction may be misaligned with each other, or (2) width Many discontinuities 61 of the convex rows adjacent to each other in the direction may be non-uniform, and some discontinuities 61 may be uniform in the width direction. In the case of (2), it means that the discontinuities 61 of a predetermined ratio or more with respect to the total number of discontinuities 61 of one convex row are not aligned with the discontinuities 61 of the convex rows adjacent to the convex row. . The predetermined ratio is, for example, preferably 70% or more, more preferably 70% to 99%, further preferably 80% to 95%.
The said predetermined ratio shall be measured as follows. (A) From the range of 10 cm × 10 cm on the surface of the wood flooring 1, two convex rows adjacent to each other in the width direction are arbitrarily specified, and the number of discontinuities 61 of one of the convex rows is measured. , And this is the total number. (B) In the discontinuity portion 61 of the one convex row, the number of discontinuities with the discontinuity portion 61 of the other convex row is measured, and this is taken as the irregular number. (C) It is assumed that the discontinuity portion 61 that has become irregular is measured by a predetermined ratio [%] = (number of irregularities / total number of pieces) × 100.

As shown in FIG. 3 and FIG. 4, the plurality of convex portions 5 forming the convex row are not fixed to each other, and the adjacent planar shapes of the convex portions 5 in the flow direction are almost different. Further, the shapes of the respective convex portions 5 of the convex rows adjacent to each other in the width direction are almost different in plan view. By arranging a plurality of convex rows composed of a set of irregular-shaped convex portions 5 side by side in the width direction, the wood grain flooring material 1 having an appearance similar to natural wood can be configured.
For example, as shown in FIG. 3, the shape of each convex portion 5 forming the convex row is different in plan view, but most of the convex portions 5 are common in that they are generally elongated in the flow direction of the wood grain. ing. However, some of the convex portions 5 have a dot shape in a plan view. Most of the protrusions 5 are elongated and extend substantially in the flow direction of the wood grain, and the shapes of the protrusions 5 in plan view are different, so that an appearance close to that of natural wood can be obtained.
It should be noted that although the plurality of convex portions 5 forming each convex row are independent for each convex row, for example, some of the adjacent convex rows indicated by reference numeral A in FIG. May be connected.

  With reference to FIG. 4, a part or all of the elongated convex portion 5 extending substantially in the flow direction of the grain is a narrow portion 71 and a wide portion having a width larger than the narrow portion 71 in plan view. And a portion 72. The wide portion 72 and the narrow portion 71 are relative concepts, and for example, the wide portion 72 means a portion having a larger width than the narrow portion 71 with reference to the width of the narrow portion 71. It should be noted that the width of the narrow portion 71 refers to its width direction length, and the width of the wide portion 72 refers to its width direction length. The width of the wide portion 72 is not particularly limited, but is, for example, 1 mm to 3 mm, preferably 1.3 mm to 2.5 mm. The width of the narrow portion 71 is not particularly limited, but is, for example, 0.5 to 0.9 times, preferably 0.6 to 0.8 times the width of the wide portion 72.

In the woodgrain flooring material 1 of the present invention, some of the convex portions 5 have one wide portion 72 and one narrow portion 71, and some of the convex portions 5 include two or more wide portions 72. It has one narrow portion 71, some convex portions 5 have two or more wide portions 72 and two or more narrow portions 71, and some convex portions 5 have wide portions 72 and It does not have the narrow portion 71.
For example, the convex portion 5a in FIG. 4 has two wide portions 72 and two narrow portions 71. The convex portion 5b in the figure has three wide portions 72 and two narrow portions 71 respectively arranged between the three wide portions 72. The convex portion 5c in the figure has two wide portions 72 and one narrow portion 71 arranged between the two wide portions 72. For example, the convex portion 5d in FIG. 3 has substantially no width in the flow direction, and conceptually does not have the wide portion 72 and the narrow portion 71. By arbitrarily mixing the convex portion 5 having the wide portion 72 and the narrow portion 71 in the plan view or the convex portion 5 having no such portion, the wood grain flooring material 1 having an appearance close to that of natural wood can be configured. .

The ratio of the convex portion 5 having at least one wide portion 72 and at least one narrow portion 71 is not particularly limited, but 70% or more of the convex portions 5 are at least one wide portion 72 and at least one narrow portion. 71 is preferable, 70% to 99% is more preferable, and 80% to 95% is further preferable.
The ratio of the convex portion 5 having the wide portion 72 and the narrow portion 71 is measured as follows. (A) The number of convex portions 5 within the range of 10 cm × 10 cm on the surface of the wood flooring 1 is measured, and this is taken as the total number. (B) Among the convex portions 5 in the above range, the number of the convex portions 5 having the wide portion 72 and the narrow portion 71 is measured, and this is set as the number of the convex portions 5 having the wide portion. (C) The ratio of the convex portions 5 having the wide portion 72 and the narrow portion 71 [%] = (the number of the convex portions 5 having the wide / narrow portion / the total number) × 100 is measured. Hereinafter, this measuring method is referred to as a convex portion ratio measuring method.

Focusing on the three-dimensional shape of the convex portion 5, referring to FIG. 4 to FIG. 7, a part or all of the elongated convex portion 5 extending substantially in the flow direction of the wood grain has a large protruding height. It has a portion 75 and a valley portion 76 having a smaller protruding height than the peak portion 75. The peak portion 75 and the valley portion 76 are relative concepts, and, for example, the valley portion 76 means a portion having a smaller protruding height than the peak portion 75 as a reference. The protruding height of the crest portion 75 is the height from the concave portion 62 to the top surface of the crest portion 75, and the protruding height of the valley portion 76 is the height from the concave portion 62 to the top surface of the valley portion 76. Say.
In FIG. 4, dots are added to the top surface of the mountain portion 75 for convenience. In FIG. 4, a region surrounded by an endless solid line that represents the contour of the convex portion 5 in plan view (that is, the shape of the convex portion 5 in plan view) and is not dotted is the top surface of the valley portion 76. And an inclined surface.

In detail, referring to FIG. 7, all the convex portions 5 have a base point 51 that is a starting point to rise from the concave portion 62, an inclined surface 52 that rises relatively steeply continuously to the base point 51, and a tip of the inclined surface 52. And a top surface 53 which is flat or arcuate. The base point 51 of the convex portion 5 defines the contour of the convex portion 5 in a plan view. It is preferable that the surface continuous from the recess 62 to the base point 51 and from the base point 51 to the inclined surface 52 is a curved surface. This makes it easier for fine particles such as dust to get over the convex portion 5, and the cleaning property is further improved.
In the wood flooring 1 of the present invention, some of the convex portions 5 have one crest portion 75 and one valley portion 76, and some of the convex portions 5 include two or more crest portions 75 and 1. Some troughs 5 have two troughs 76, two or more crests 75 and two or more troughs 76, and some troughs 5 do not have troughs 76. .
By arbitrarily mixing the protrusions 5 having the peak portions 75 and the valley portions 76 in the thickness direction and the protrusions 5 not having them, the wood grain floor covering 1 having an appearance close to that of natural wood can be configured.

The convex portion 5a in FIGS. 4 and 5 has three peak portions 75 and two valley portions 76 arranged between the peak portions 75. The convex portion 5b in FIGS. 4 and 6 has three peak portions 75 and two valley portions 76 arranged between the peak portions 75. The convex portion 5e in FIGS. 4 and 5 has no height difference in the thickness direction and conceptually does not have the valley portion 76.
In the convex portion 5a, the plurality of peak portions 75 may have the same protrusion height or different protrusion heights. For example, the convex portion 5a includes mountain portions 75 having different protrusion heights. For example, one mountain portion 751 (hereinafter referred to as high mountain portion 751) has a larger protruding height than the other mountain portion 752 (hereinafter referred to as low mountain portion 752). The high mountain portion 751 is a portion having the largest protrusion height in the convex portion 5a. On the other hand, in the convex portion 5b, the protrusion heights of all the peak portions 75 are substantially the same. Some of the convex portions 5 having the peak portions 75 and the valley portions 76 have the above-described high mountain portion 751 and the low mountain portion 752, and some have a plurality of mountain portions 75 having the same protruding height. .

  The protruding height H1 of the high mountain portion 751 is not particularly limited, but is 0.2 mm to 0.8 mm, and preferably 0.4 mm to 0.7 mm, from the viewpoint of cleanability. The protruding height H2 of the low mountain portion 752 is not particularly limited, but is, for example, 0.9 times to 0.99 times the protruding height H1 of the high mountain portion 751. The projecting height H2 of the low mountain portion 752 is larger than the projecting height of the valley portion 76.

The protrusion height H3 of the valley portion 76 is not particularly limited, but from the viewpoint of cleanability, it is less than 0.9 times the protrusion height H1 of the high mountain portion 751, preferably 0.8 times or less, and more preferably Is 0.7 times or less. In specific dimensions, the protrusion height H3 of the valley portion 76 is, for example, 0.45 mm or less, and preferably 0.4 mm or less. With such a protruding height, the fine particles can easily get over the valley portion 76 when swept with a cleaning tool such as a broom, and the cleaning performance is improved.
The lower limit of the protrusion height H3 of the valley portion 76 is not particularly limited, but is 0.2 times or more of the protrusion height H1 of the high mountain portion 751 and is preferably 0. It is 3 times or more, and more preferably 0.4 times or more. When the protrusion height H3 of the valley portion 76 is equal to or more than the lower limit value, the streak shape of the wood grain can be expressed without impairing the length of the convex portion 5.
The dimension of the mountain portion 75 in the flow direction is, for example, 0.5 mm to 3 mm, preferably 1 mm to 2 mm. The dimension of the valley portion 76 in the flow direction is, for example, 1.5 mm to 4 mm, preferably 2 mm to 3 mm. The size of the valley portion 76 in the flow direction is preferably larger than the size of the crest portion 75. This makes it easier for fine particles such as dust to get over the valley portion 76, and enhances the cleaning property in the width direction.

  In addition, the protrusion height H4 of the peak portion 75 of the convex portion 5 having a plurality of peak portions 75, the protrusion heights of all the peak portions 75 being the same, and having at least one valley portion 76 is the above-mentioned low. It is substantially the same as the protruding height H2 of the mountain portion 752. Further, in the case of the convex portion 5 having only one mountain portion 75 and not having the valley portion 76, the protrusion height H4 of the mountain portion 75 is the protrusion height H2 of the low mountain portion 752 or the valley portion. It is substantially the same as the protrusion height H3 of 76.

The ratio of the convex portion 5 having at least one crest portion 75 and at least one valley portion 76 is not particularly limited, but 70% or more of the convex portions 5 have at least one crest portion 75 and at least one trough portion 76. It is preferable that it has 70% to 99%, further preferably 80% to 95%.
The proportion [%] of the convex portion 5 having the peak portion 75 and the valley portion 76 is equal to the “convex portion 5 having the wide portion 72 and the narrow portion 71” and the “convex portion 5 having the narrow portion” in the convex portion ratio measuring method. Shall be read as "the convex portion 5 having the peak portion 75 and the valley portion 76" and "the convex portion 5 having the height difference", and shall be measured.

In addition, regarding the convex portions 5 and 5 of the convex rows adjacent to each other in the width direction and having the valley portions 76, the valley portions 76 may be aligned in the width direction, or may be uneven. May be
It is preferable that the valley portions 76 of at least a part of the convex portions 5 of the convex rows adjacent to each other in the width direction are aligned in the width direction. The fact that the valley portions 76 of the convex portions 5 and 5 of the adjacent convex rows are aligned in the width direction means that the convex portions 5 of the convex rows adjacent thereto are on the extension line in the width direction of the valley portions 76 of one convex portion 5. It means that the valley portion 76 is located.
For example, in FIG. 4, most of the valley portions 76 of the convex portion 5 are aligned in the width direction.

When the valley portions 76 of the convex portions 5 and 5 of the convex rows that are adjacent in the width direction are aligned in the width direction, (1) all the convex portions of the convex portions 5 and 5 of the convex rows that are adjacent in the width direction. The valley portions 76 of 5 may be aligned in the width direction, or (2) the valley portions 76 of many convex portions 5 and 5 of the adjacent convex rows in the width direction are aligned in the width direction and are slightly convex. The valley portions 76 of the portions 5 and 5 may be irregular. In the case of (2), the valley portions 76 of a predetermined ratio or more with respect to the total number of the valley portions 76 of the convex portions 5 of one convex row are the valley portions 76 of the convex portions 5 of the convex row adjacent to the convex row. It means that it is aligned with. The predetermined ratio is, for example, preferably 70% or more, more preferably 70% to 99%, further preferably 80% to 95%.
The said predetermined ratio shall be measured as follows. (A) From the range of 10 cm × 10 cm on the surface of the wood floor material 1, two convex rows adjacent in the width direction are arbitrarily specified, and one of the convex rows of the convex portion 5 of the convex portion 5 is The number is measured and this is the total number. (B) Among the valley portions 76 of the convex portions 5 of the one convex row, the number that is aligned with the valley portions 76 of the convex portions 5 of the other convex row is measured, and this is taken as the total number. (C) It is assumed that the valley portions 76 aligned in the width direction are measured by a predetermined ratio [%] = (number of aligned pieces / total number of pieces) × 100.

Above all, it is preferable to include the convex portion 5 having the wide portion 72 and the crest portion 75 in the same portion and having the narrow portion 71 and the valley portion 76 in the same portion. That is, in the convex portion 5 having at least one wide portion 72 and at least one narrow portion 71, the convex portion 5 in which the protruding height of at least one wide portion 72 thereof is larger than the protruding height of the narrow portion 71 is It is preferably included.
The convex portions 5a and 5b shown in FIGS. 5 and 6 are an example of the convex portion 5 in which at least one wide portion 72 is a peak portion 75 and at least one narrow portion 71 is a valley portion 76. is there.

The proportion of the convex portions 5 in which at least one wide portion 72 is the peak portion 75 and at least one narrow portion 71 is the valley portion 76 is not particularly limited, but 70% or more of the convex portions 5 have such a relationship. It is preferable that the above is satisfied.
The proportion of the convex portion 5 in which at least one wide portion 72 is the peak portion 75 and at least one narrow portion 71 is the valley portion 76 is determined by the "wide portion 72 and narrow portion 71" of the convex portion ratio measuring method. And “convex portion 5 having width” are read as “convex portion 5 in which at least one wide portion 72 is a peak portion 75 and at least one narrow portion 71 is a valley portion 76”. Shall be measured.

Further, the convex portion 5 is subjected to a known satin finish treatment (the unevenness of the satin finish is not shown). By applying the satin finish to the convex portion 5, it is possible to enhance the grip force on the sole of the foot and improve the slip resistance.
The surfaces of the recesses 62 and the discontinuities 61 are flat (smooth surfaces), but fine streak-shaped projections extending in the grain flow direction are formed in places on the surfaces of the recesses 62 (this streak). -Shaped protrusions are not shown). The fine streak-like projection reproduces the conduit groove of natural wood. The protrusion height of the streak-like protrusions is preferably about 50 μm or less from the viewpoint of cleanability. As a result, it is possible to further improve the wood texture while maintaining the cleanability.

[Production method of wood flooring]
The wood grain flooring material 1 of the present invention can be produced by a conventionally known production method.
For example, a convex row having a plurality of convex portions 5 is formed on the surface of the surface resin layer 2 with an embossing plate.
The embossing plate forming the convex portion 5 of the wood-grain flooring material 1 of the present invention can be obtained, for example, by the following method.
A cylindrical roll is usually used as the embossing plate. When manufacturing the embossing plate, an embossing plate forming the convex portion 5 is obtained by forming a plate recess corresponding to the convex portion 5 on a cylindrical roll.

The basic corrosion process is as follows. A resist (uncured ultraviolet curable resin film) is applied to the surface of a roll made of metal such as iron. A transparent sheet on which a pattern is printed with an ink that does not transmit ultraviolet rays is wrapped around the resist. After irradiating ultraviolet rays to cure the resist, the transparent sheet is removed and the uncured resist is removed. When a corrosive liquid is applied to this, the uncured resist removal portion of the metal roll is eroded to form a plate depression. Finally, the cured resist and the corrosive liquid are removed.
By carrying out this corrosion step once or more, an embossed plate forming the convex portion 5 can be obtained. The number of roll corrosion steps is not particularly limited and is, for example, 1 to 8 times. The larger the number of repetitions of the corrosion step, the more irregular the uneven shape can be formed.

Preferably, the corrosion process is repeated twice or more. By performing the erosion twice or more, it is possible to form a plate recess corresponding to the protrusion 5 having the above-mentioned peaks and valleys having different projecting heights (the plate recess corresponding to the protrusion 5).
A portion corroded multiple times by the corrosive liquid (that is, a portion where the corrosive liquid is applied plural times over) is, for example, a plate recess that can form a high mountain portion, and a portion corroded by the corrosive liquid twice ( In other words, a portion where the corrosive liquid is applied twice is, for example, a plate recess that can form a low-pitched portion, and a portion that is corroded by one corrosive liquid is, for example, a plate recess that can form a valley portion. Becomes
By adjusting the type and concentration of the corrosive liquid, it is possible to form a plate depression that can form the square-shaped convex portion 5.
When the corrosive liquid and the resist are removed cleanly, an embossed plate having plate depressions on the surface can be obtained. The plate dents formed on the surface of the embossing plate correspond to the projections 5 of the wood-grain flooring material 1, and the parts other than the plate dents correspond to the recesses and interruptions of the wood-grain flooring material 1.
When the hairline-like fine embossing is formed on the embossing plate, it is possible to obtain the wood grain flooring material 1 in which the above-mentioned fine streak-like projections are formed in the concave portions 6. Examples of the method for forming a hairline-like fine emboss on the embossed plate include a sand blasting process, a sandpaper process, and a hairline process on the surface of the embossed plate, in addition to the plate corroding step using the above-described corrosive liquid.
In addition, when a fine satin embossing is formed on the embossing plate, it is possible to form the convex portion 5 that has been subjected to the above-mentioned satin treatment.
In this way, the embossed plate used for producing the wood grain flooring material 1 of the present invention can be obtained.

By pressing the obtained embossing plate against the surface of the surface resin layer 2, the wood grain flooring material 1 having a plurality of convex rows can be obtained.
When pressing the embossing plate, it is preferable to heat the surface resin layer 2. For example, the surface resin layer 2 may be pressed using a heated embossing plate, or the surface resin layer 2 may be heated using a separate heating device immediately before pressing the embossing plate. The heating temperature at that time is appropriately set depending on the resin component forming the surface resin layer 2, but is usually about 130 ° C to 200 ° C. The wood grain flooring material 1 thus obtained is usually wound on a roll and provided for storage and transportation.

[Use of wood flooring]
The wood-grain flooring material 1 of the present invention is, for example, an indoor, outdoor or semi-outdoor floor such as a commercial facility, an outdoor or semi-outdoor floor such as a corridor or balcony of an apartment, an indoor, outdoor or semi-stair, etc. It is used by laying on various floors such as outdoor floors. In particular, it is effective to lay the woodgrain flooring material 1 of the present invention on an outdoor or semi-outdoor floor surface that is often cleaned using a cleaning tool such as a broom or a brush. In addition, the semi-outdoor includes a place where the wall portion is open although the roof is like an eaves. Hereinafter, the outdoor or semi-outdoor floor is simply referred to as "outdoor floor".
For example, the wood-grain flooring material 1 of the present invention is used by being laid on the outdoor floor surface adjacent to the indoor floor surface, or both the outdoor floor surface adjacent to the indoor floor surface and the indoor floor surface. It is used by laying on the indoor floor surface adjacent to the outdoor floor surface. The outdoor or semi-outdoor floor adjacent to the indoor floor includes, for example, a balcony portion connected to a room of an apartment.

FIG. 8 is a plan view of a floor surface structure 10 in which the wood grain flooring material 1 of the present invention is laid on the outdoor floor surface adjacent to the indoor floor surface. The indoor / outdoor boundary is not limited to the case where the outdoor floor surface and the indoor floor surface are directly adjacent to each other. For example, the indoor / outdoor boundary may be adjacent to each other via a building material such as a sweep window.
In the illustrated example, the wood grain floor material 1 of the present invention is laid on the outdoor floor surface, and the indoor floor surface adjacent to the outdoor floor surface is a floor material 9 in which a wood pattern other than the present invention is exposed. Has been laid. As the flooring material 9 in which the wood grain pattern is exposed, a well-known wood flooring material can be used. Known materials such as the floor material of No. 1 are mentioned.
Preferably, the wood grain floor material 1 of the present invention laid on the outdoor floor surface and the publicly known floor material 9 laid on the indoor floor surface are laid so that the flow directions of the wood grains coincide with each other. Since the grain flow directions of the two floor materials 1 and 9 laid on the indoor floor surface and the outdoor floor surface are the same, the sense of unity between the two floor materials 1 and 9 is increased, and the design is improved.

The flow direction of the wood of the two floor materials 1 and 9 may be the indoor / outdoor direction (from the indoor side to the outdoor side) or the direction orthogonal to the indoor / outdoor direction. It is preferable that the flow directions of the 1st and 9th woods match the indoor and outdoor directions. By setting the indoor / outdoor direction, it is possible to increase the sense of depth and give a feeling of having a large space when the outdoor is viewed from the indoor side.
In the illustrated example, in the wood-grain flooring material 1, the flow direction of the wood grain is the lateral direction of the floor material as described above, and in the floor material 9, the flow direction of the wood grain is the longitudinal direction of the floor material. It is the one that the exposed wood pattern is displayed. Therefore, the floor materials 1 and 9 are laid so that the longitudinal direction of the wood-grain flooring material 1 and the longitudinal direction of the floor material 9 are orthogonal to each other. There is.

As described above, the wood-grain flooring material 1 of the present invention has a plurality of convex portions 5 having different plan-view shapes, and further includes the convex portions 5 having a height difference in three-dimensional shape. Have.
In addition, since various convex portions 5 having different plan-view shapes are formed, the sole of the foot is unlikely to slip when walking, and in particular, the convex portion 5 having a height difference (the convex portion 5 having the mountain portion 75 and the valley portion 76). Since it contains, it is particularly excellent in slip resistance.

The wood-grain flooring material 1 of the present invention is also excellent in cleanability.
Specifically, since the conventional wood-grain flooring material has a convex row extending in the flow direction of the wood grain, when the surface of the wood-grain flooring material is swept in the flow direction with a cleaning tool such as a broom or a brush, dust is generated. Particles such as sand and sand are hard to stay and are swept away. However, the conventional wood-grain flooring material has a drawback that particles are easily retained when it is swept in the width direction by a cleaning tool, resulting in poor cleanability.

In this respect, since the wood grain flooring material 1 of the present invention is composed of a plurality of projections 5 which are intermittently formed in the convex row in the flow direction of the wood grain and have the discontinuous portions 61, the wood grain flooring material. When the surface of No. 1 is swept in the width direction with a cleaning tool, fine particles are swept out in the width direction from the discontinuity 61.
FIG. 9 is a reference plan view for conceptually explaining the situation at the time of cleaning the woodgrain flooring material 1 of the present invention (dots are added to the top surface of the mountain portion 75). Since it is a reference diagram to the last, the plan view shape of the convex portion is different from the actual one.
Referring to FIG. 9, when the surface of the wood grain floor covering 1 is swept in the width direction with a cleaning tool, the adjacent convex rows are broken at the portions where the discontinuities 61 of the adjacent convex rows are uneven in the width direction. Among the fine particles existing in the space (that is, the concave portion 62), the fine particles located on the lateral side in the width direction of the interrupted portion 61 are swept out from the interrupted portion 61. The movement of the fine particles swept in the width direction from the discontinuity 61 is indicated by an outline arrow.

Furthermore, since at least a part of the plurality of convex portions 5 forming the convex row has three-dimensionally the peak portion 75 and the valley portion 76, the fine particles present between the adjacent convex rows are the valley portions 76. It will get over and sweep out in the width direction. The movement of the fine particles swept in the width direction over the valley portion 76 is indicated by a thick arrow.
In addition, since at least a part of the plurality of convex portions 5 forming the convex row has the narrow portion 71 and the wide portion 72, the fine particles gather in the narrow portion 71 when swept in the width direction. Like The movement of fine particles gathering in the narrow portion 71 is indicated by a thin arrow.
Since the above-mentioned wood flooring material 1 has the convex portion 5 in which at least one wide portion 72 is the mountain portion 75 and at least one narrow portion 71 is the valley portion 76, the narrow portion 71 is The collected fine particles easily get over the narrow portion 71 that has become a three-dimensionally valley portion 76 and are swept in the width direction.
As described above, the wood-grain flooring material 1 of the present invention is excellent in cleanability.

  Hereinafter, the present invention will be described in more detail by showing Examples of the present invention. However, the present invention is not limited to the following examples.

[Materials used]
(1) Surface resin layer A colorless and transparent suspension vinyl chloride resin.
(2) Decorative layer Design print sheet. A design print layer printed with a known ink on a vinyl chloride film.
(3) Fiber Reinforcing Layer A glass mat impregnated with a paste vinyl chloride resin.
(4) Backside resin layer Vinyl chloride resin.

[Example 1]
Each of the layers (1) to (4) was prepared in advance, and layers (1) to (4) were laminated in that order from the surface side and heated to about 150 ° C. to integrate them. In this way, a laminate having a layer structure of a surface resin layer having a thickness of about 0.3 mm / a decorative layer having a thickness of about 0.2 mm / a fiber reinforcing layer having a thickness of about 0.3 mm / a back surface resin layer having a thickness of about 1.3 mm is obtained. Formed. This laminate was passed between heated embossing rolls to form a plurality of convex rows having a grain pattern on the surface resin layer. As the embossing roll (roll-shaped embossing plate), one capable of forming a protrusion having a peak portion with a protrusion height of 0.55 mm and a valley portion with a protrusion height of 0.4 mm was used. The convex row is composed of a plurality of convex portions which are intermittently formed in the flow direction via the discontinuous portions, and the discontinuous portions of each convex row are uneven in the width direction at many places. Further, the plan view shapes of the respective convex portions were all different. The plurality of convex portions included a convex portion in which the wide portion is a mountain portion and a narrow portion is a valley portion, a convex portion having a wide portion and a narrow portion, and a convex portion having a mountain portion and a valley portion. .
The wood grain flooring material produced in Example 1 was cut into a size of length × width = about 8 cm × about 10 cm, and a photograph of the surface thereof is shown in FIG.

[Example 2]
In the same manner as in the manufacturing method of Example 1, a wood grain flooring material having a plurality of convex rows as shown in FIG. 10 formed on the surface resin layer was manufactured. However, in Example 2, an embossing roll capable of forming a protrusion having a peak portion with a protrusion height of 0.5 mm and a valley portion with a protrusion height of 0.4 mm was used.
The resulting woodgrain flooring material was substantially the same as in Example 1 except that the protrusion height of the peak portion of the convex portion was different from that in Example 1 described above.

[Example 3]
In the same manner as in the manufacturing method of Example 1, a wood grain flooring material having a plurality of convex rows as shown in FIG. 10 formed on the surface resin layer was manufactured. However, in Example 3, an embossing roll capable of forming a protrusion having a protrusion height of 0.5 mm (that is, a protrusion having no valley portion and having no height change) was used.
The resulting woodgrain flooring material was substantially the same as in Example 1 except that the protrusion height of the convex portion was constant and the convex portion did not have a valley portion.

[Example 4]
In the same manner as in the manufacturing method of Example 1, a wood grain flooring material having a plurality of convex rows as shown in FIG. 10 formed on the surface resin layer was manufactured. However, in Example 4, the embossing roll capable of forming the protrusion having the peak portion having the protrusion height of 0.8 mm and the valley portion having the protrusion height of 0.65 mm was used.
The resulting woodgrain flooring material was substantially the same as in Example 1 except that the protrusion heights of the peaks and valleys of the convex portions were different from those in Example 1 above.

<Measurement of protrusion height of protrusion>
A sample piece for measurement was obtained from the wood-grain flooring material of Example 1 by cutting an arbitrary portion into 10 cm × 10 cm. By visually observing the surface of the measurement sample piece, a portion corresponding to the valley portion of the convex portion was cut along the width direction, and the protruding height of the cut valley portion existing on the cut surface was measured. The measurement was performed by enlarging the cut surface with a microscope (magnification: 50 times). The protrusion height in this case is the length from the recess to the top surface of the cut valley portion. The arbitrarily selected 10 valley portions were visually selected, the respective protrusion heights were measured, and the minimum value among the 10 measured values was defined as the valley portion protrusion height. By visually observing the surface of the measurement sample piece, a portion corresponding to the peak portion of the convex portion is cut along the width direction, and the protruding height of the cut peak portion existing on the cut surface is similarly set. Was measured. The protruding height in this case is the length from the recess to the top surface of the cut mountain portion. 10 different peak portions were arbitrarily selected visually, and the protrusion height of each was measured, and the maximum value of the 10 measured values was taken as the protrusion height of the peak portion. Table 1 shows the protrusion heights of the valley portion and the peak portion of Example 1.

With respect to the wood-grain flooring materials of Examples 2 to 4, the protrusion heights of the valley portion and the mountain portion were measured in the same manner as the wood-grain flooring material of Example 1. The results are shown in Table 1.
However, with respect to the wood flooring material of Example 3, since the convex portion having no valley portion was formed, the protrusion height of the valley portion was not measured.
As shown in Table 1, in the wood grain flooring materials produced in Examples 1 to 4, all the convex portions having the projected height almost as designed were formed.

<Cleaning test>
Test pieces were obtained from each of the wood-grain flooring materials of Examples 1 to 4 by cutting an arbitrary portion into a size of 30 cm × 30 cm.
At 23 ° C., humidity of 50% RH, and atmospheric pressure, 15 g of alumina particles having an average particle diameter of 30 μm are placed on the surface of each test sample piece (the surface on which the convex portions are formed), and then, for testing. The weight of the sample piece was measured. Immediately after the measurement, using a commercially available synthetic fiber broom (the material of the broom ears was polypropylene), after sweeping four times in the width direction, which is the direction orthogonal to the convex rows, the weight of the test sample piece was measured. The particle removal rate [%] was calculated from the following formula.
Remaining amount of alumina particles [g] = weight of test sample piece immediately after placing alumina particles-weight of test sample piece immediately after sweeping with a broom.
Removal rate [%] = 100−remaining amount of alumina particles [g] ÷ 15 [g] × 100.

The cleaning tests of Examples 1 to 4 were each performed 3 times. The average value of the removal rate is shown in Table 1.
In the cleanability evaluation column of Table 1, the case where the removal rate is 95% or more is represented by ◯, and the case where the removal rate is 90% or more and less than 95% is represented by Δ.

From the results of the cleaning test, it is understood that the wood grain flooring materials of Examples 1 to 4 are excellent in cleaning.
From the comparison between Examples 1 and 2 and Example 3, it can be seen that the wood grain flooring material in which the convex portion having the valley portion is formed is superior in cleaning property.
From the comparison between Examples 1 and 2 and Example 4, it can be seen that when the protrusion lengths of the crests and the troughs are not too large, the cleanability is superior. In order to form a wood grain flooring material that is more excellent in cleanability while displaying the grain shape of the wood grain, the protrusion height of the mountain portion is preferably 0.3 mm to 0.7 mm, and preferably 0.4 mm to 0. It is considered that 0.65 mm, more preferably 0.4 mm to 0.6 mm is good, and the protrusion height of the valley portion is preferably 0.1 mm to 0.5 mm, preferably 0.15 mm to 0.45 mm, and more preferably Is considered to be 0.2 mm to 0.4 mm.

1 Wood-grain flooring material 2 Surface resin layer 3 Decorative layer 4 Main body layer 5, 5a, 5b, 5c, 5d, 5e Convex part 61 Interrupted part 62 Concave part 71 Narrow part 72 Wide part 75, 751, 752 Mountain part 76 Valley part

Claims (5)

A wood-grain flooring material mainly having a resin, which has a plurality of convex rows forming a grain pattern of wood grain,
A wood grain flooring material, wherein the convex row is composed of a plurality of convex portions which are intermittently formed with a cut portion in the flow direction of the wood grain. The plurality of convex rows are arranged in parallel in the width direction which is a direction substantially orthogonal to the flow direction of the wood grain,
The wood grain flooring material according to claim 1, wherein some or all of the plurality of discontinuities of the convex rows adjacent to each other in the width direction are uneven in the width direction.   The part or all of a plurality of convex parts which constitute the said convex row have a peak part with a large protrusion height, and the valley part whose protrusion height is smaller than the said peak part, The claim | item 1 or 2 characterized by the above-mentioned. Wood flooring.   4. A part or all of the plurality of convex portions forming the convex row have a narrow portion and a wide portion having a width larger than the narrow portion in a plan view. Wood flooring. It has an indoor floor surface on which a floor material having a wood grain pattern is laid, and an outdoor or semi-outdoor floor surface adjacent to the indoor floor surface,
The wood grain flooring material according to any one of claims 1 to 4 is laid on the outdoor or semi-outdoor floor surface such that the floor material laid on the indoor floor surface and the flow direction of the wood grain match. , Floor structure.