JP2009097169A - Floor member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor member having a high luster part and a low luster part and capable of preventing the appearance of the high and low luster parts from being changed due to its use for a long period of time. <P>SOLUTION: This floor member 1 is constituted by forming projecting parts 7 and recessed parts 8 on a surface of a floor member main body 4, forming a top face 7a of the projecting part 7 into a rough surface, and forming a bottom face 8a of the recessed part 8 into a mirror finished surface. Mechanical embossing is applied on the surface of the floor member main body 4 to form the top face 7a of the projecting part 7 into the rough surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a flooring material having an uneven pattern with a difference in gloss formed on the surface.

Conventionally, floor materials having a concavo-convex pattern formed on the surface by embossing are known.
For example, Patent Document 1 discloses an embossed decorative material in which the bottom surfaces of a plurality of concave portions formed on the surface of a decorative material are formed in a fine uneven shape, and the fine uneven shape has at least two types of different gloss differences. Has been.
The embossed decorative material is less glossy on the bottom surface of the recessed portion and further has a difference in glossiness on the bottom surface of the recessed portion, so that it has a texture and is particularly effective when a wood grain pattern is revealed.
JP-A-11-254898

However, when the decorative material of Patent Document 1 is used as a flooring material, there is a problem in that the overall glossiness gradually disappears and the entire decorative material becomes a matte appearance over time.
Specifically, since the surface of the flooring is stepped on with a sole or the like, fine scratches are likely to occur. When unevenness is formed on the surface of the flooring, the top surface of the convex part is a protruding part, so the bottom of the concave part is a concave part while the sole touches the top surface of the convex part. Therefore, it is difficult for the soles or the like to contact the bottom surface of the recess. For this reason, if a flooring material having irregularities formed on the surface is used for a long period of time, the surface of the convex portion is gradually scratched and roughened, but the bottom surface of the concave portion is not much changed.
Therefore, as in Patent Document 1, when a floor material having a fine concavo-convex shape formed on the bottom surface of the recessed portion is used for a long time, the bottom surface of the recessed portion does not change much, but the gloss of the top surface of the protruding portion gradually increases. As it disappears, the entire surface of the flooring becomes rough and changes to a matte appearance. For this reason, there is a problem in that the appearance of the flooring at the beginning of use cannot be maintained, and the appearance of the flooring looks dull.

  An object of the present invention is to provide a flooring material having a high glossy portion with high glossiness and a low glossiness portion with low glossiness, and the appearance of the high glossy portion and the low glossy portion is hardly changed by use. .

  In the flooring of the present invention, a convex part and a concave part are formed on the surface of the flooring main body, the top surface of the convex part is formed in a rough surface shape, and the bottom surface of the concave part is formed in a mirror surface shape. Features.

Since the top surface of the convex portion is formed into a rough surface, the top surface of the convex portion has low gloss (low gloss portion). Moreover, since the bottom surface of the concave portion is formed in a mirror surface, the floor material has a high glossiness (high gloss portion).
In the floor material having such a low gloss part and a high gloss part, a pattern formed by the convex part and the concave part appears clearly due to the gloss difference between the two parts. For this reason, the flooring has a good appearance in which the pattern can be clearly seen.
Furthermore, since the floor material has a contrast at the boundary portion due to the difference in height between the convex portion and the concave portion, the gloss difference is more emphasized. In particular, the peripheral edge of the concave portion looks dark due to the shadow of the convex portion, whereas the central portion of the concave portion looks bright due to the reflection of light, so that the difference in gloss is more emphasized.

Furthermore, when the flooring is used for a long time, the top surface of the convex portion is damaged, while the bottom surface of the concave portion is hardly damaged.
Since the top surface of the convex portion is formed into a rough surface, the top surface of the convex portion remains low in gloss even if the top surface of the convex portion is damaged due to long-term use. On the other hand, the floor material has a mirror-shaped bottom surface of the concave portion that is difficult to be damaged, so that the glossiness of the bottom surface of the concave portion can be maintained even when used for a long time.
Therefore, the above-mentioned flooring material does not easily change its appearance even when used for a long period of time, and can maintain a good appearance for which the pattern can be clearly seen for a long period of time as in the beginning of use.

  A preferred flooring material has a top surface roughness (Ra) of 5 μm to 15 μm and a bottom surface roughness (Ra) of 6 μm or less.

  In the flooring of the present invention, since the top surface of the convex portion becomes a low gloss portion and the bottom surface of the concave portion becomes a high gloss portion, a pattern formed by the convex portion and the concave portion appears clearly due to the difference in gloss between the two portions. Even if the flooring of the present invention is used for a long period of time, it is difficult for the clear pattern due to the difference in gloss to disappear, so that the initial appearance can be maintained for a long period of time.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partial sectional view of an embodiment of the flooring of the present invention. It should be noted that the actual dimensions are different in each drawing.

In FIG. 1, reference numeral 1 denotes a flooring having a flooring main body 4 and convex portions 7 and concave portions 8 formed on the surface of the flooring main body 4.
The convex portion 7 and the concave portion 8 are formed by performing, for example, mechanical embossing on the surface of the floor material body 4.
The top surface 7a of the convex portion 7 (surface that protrudes from the top) is formed into a rough surface, and the bottom surface 8a (surface that forms a concave bottom) of the recess 8 is formed into a mirror surface. Has been.
Hereinafter, the flooring 1 of the present invention will be described while explaining each component.

The flooring main body 4 is not particularly limited as long as it is a sheet-like material that can function as a flooring material and can impart a concavo-convex pattern on the surface, and a conventionally known configuration can be adopted.
The flooring main body 4 usually has a base material layer and a resin layer provided on the surface of the base material layer.
Specifically, the floor material body 4 includes, for example, a base material layer 2, a resin layer 3 provided on the surface side of the base material layer 2, and a printing layer 5 provided on the surface of the resin layer 3. The protective layer 6 provided on the surface of the printing layer 5 is composed of a laminated body laminated in this order.

The base material layer 2 is a layer provided for the purpose of imparting dimensional stability of the flooring 1 and improving adhesion to the ground.
Examples of the base material layer 2 include fabrics such as woven fabric and non-woven fabric; papers such as flame retardant paper; synthetic resin sheets; inorganic plates such as wooden boards and gypsum boards; plates such as metal boards; It is done.
The material of the fabric such as woven fabric or nonwoven fabric is not particularly limited, and examples thereof include synthetic resin fibers such as cellulosic fibers and polyester fibers; inorganic fibers such as glass fibers; natural fibers such as jute.

The base material layer 2 may be a single layer or a multilayer.
Preferably, as shown in FIG. 1, the base material layer 2 is composed of a plurality of layers.
A preferred substrate layer 2 has a first substrate 21 and a second substrate 22. Between this 1st base material 21 and the 2nd base material 22, the contact bonding layer 23 for joining both is provided.
The first base material 21 and the second base material 22 can be appropriately selected from the cloths and papers exemplified above.

  As the first base material 21, it is preferable to use a flexible woven fabric or non-woven fabric which is excellent in thermal stability and mechanical stability. For example, as the 1st base material 21, the nonwoven fabric or woven fabric which consists of synthetic resin fibers, such as inorganic fibers, such as glass fiber, and a polyester-type fiber, etc. can be used. The first base material 21 mainly contributes to the dimensional stability of the flooring 1. Moreover, since the glass fiber nonwoven fabric or the glass fiber woven fabric is excellent in strength, by using the glass fiber nonwoven fabric or the glass fiber woven fabric as the first base material 21, the back surface of the resin layer 3 is supported when the embossed plate is pressed. The convex portion 7 and the concave portion 8 can be formed.

On the other hand, as the second base material 22, it is preferable to use a heat-shrinkable sheet. The heat-shrinkable sheet refers to a sheet that can shrink at this heating temperature when heated to cure the resin layer 3 and the like. The directionality of the heat shrinkage is a biaxial direction in the plane of the heat shrinkable sheet (one direction in the plane and a direction perpendicular to the one direction in the plane).
As the heat-shrinkable sheet, for example, a nonwoven fabric or a woven fabric using a synthetic fiber that can be heat-shrinked at the heating temperature of the resin layer 3, a synthetic resin sheet that can be heat-shrinked at the heating temperature of the resin layer 3, or the like is used. be able to. Especially, as a heat-shrinkable sheet, the heat-shrinkable nonwoven fabric or woven fabric using the synthetic fiber which can be heat-shrinked is preferable. The second base material 22 is thermally contracted toward the center side in the plane by heat when the resin layer 3 and the like are cured. The contraction force of the second base material 22 can cancel the contraction force that the resin layer 3 contracts at the time of curing, and the upper warping of the resin layer 3 can be regulated. Therefore, it is possible to provide a flat flooring 1 that is less likely to warp during manufacturing and over time and has excellent dimensional stability.

  The adhesive layer 23 is not particularly limited as long as it has a function as an adhesive capable of joining and integrating the first base material 21 and the second base material 22. For example, a conventionally known resin may be used. it can. As the resin for the adhesive layer 23, it is preferable to use polyethylene. This is because polyethylene is relatively flexible and has an excellent effect of preventing displacement between the first base material 21 and the second base material 22.

  In addition, the base material layer 2 is not limited to the multilayer structure which has the said 1st base material 21 and the 2nd base material 22, It can change variously. For example, a backing layer may be further provided on the back surface of the second base material 22 (not shown). The backing layer is not particularly limited, and examples thereof include vinyl chloride resins, ethylene-vinyl acetate copolymer resins, ethylene-ethyl acetate copolymer resins, olefin resins such as polyethylene and polypropylene, polyester resins, and urethane resins. Examples thereof include synthetic resins such as olefins, thermoplastic elastomers such as olefins, rubber-based sheets such as acrylonitrile-butanediene rubber, acrylic rubber, chloroprene rubber, styrene-butanediene rubber, foamed sheets, and laminated sheets thereof.

The resin layer 3 may be foamed or non-foamed. Examples of the resin component constituting the resin layer 3 include a vinyl chloride resin (PVC); an ethylene-vinyl acetate copolymer, a copolymer of ethylene and α-olefin, an ethylene- (meth) acrylate alkyl copolymer, and the like. Ethylene copolymer; Olefin resin such as polypropylene and polyethylene; Acrylic resin; Resin (including elastomer) such as polyamide resin such as 6,6 nylon, alone or a mixture of two or more it can.
Among these, as the resin component of the resin layer 3, a vinyl chloride resin is preferable. The vinyl chloride resin may be a paste type or a suspension type.

When foaming the resin layer 3, various foaming agents are blended in the resin composition constituting the resin layer 3. The foaming agent is not particularly limited, and chemical foaming agents such as azo compounds, hydrazide compounds, and nitroso compounds; gas foaming agents such as carbon dioxide gas, butane gas, and chlorofluorocarbon gas; In addition, you may add foaming adjuvants, such as a zinc oxide, to a chemical foaming agent as needed.
Moreover, you may mix | blend various additives with the resin composition which comprises the resin layer 3 according to the kind of resin. Examples of the additive include flame retardants such as metal hydrated oxides such as aluminum hydroxide and magnesium hydroxide; calcium carbonate, calcium oxide, barium carbonate, magnesium hydroxide, aluminum hydroxide, clay, talc, mica, etc. Fillers; plasticizers such as di-2-ethylhexyl phthalate (DOP), dibutyl phthalate, dihexyl phthalate, diisononyl phthalate, phosphate ester, chlorinated paraffin, trimellitic acid ester; calcium stearate, inorganic salt, organotin compound Stabilizers; lubricants; antioxidants; colorants such as pigments; and the like.

  When the resin layer 3 is foamed, the expansion ratio is not particularly limited, but is preferably 2 to 10 times, more preferably 3 to 6 times. If the foaming ratio of the resin layer 3 is too low, the cushioning property of the flooring 1 is lowered. On the other hand, if the foaming ratio of the resin layer 3 is too high, the caster running performance is poor and the restorability of the dent due to the load is poor. It is.

The thickness of the resin layer 3 is not particularly limited, but the thickness when the resin layer 3 is foamed is preferably 1.0 mm to 6.0 mm, more preferably 1.2 mm to 3.5 mm. is there. This is because if the thickness of the resin layer 3 is too thin, it is difficult to form the relatively deep recess 8, while if the thickness of the resin layer 3 is too thick, the caster traveling performance is deteriorated.
When the resin layer 3 is non-foamed, the thickness of the resin layer 3 is thinner than the thickness of the foamed resin layer 3 at a ratio corresponding to the expansion ratio.

The print layer 5 is a layer on which a desired design is printed.
The printing layer 5 may be formed by printing ink directly on the surface of the resin layer 3, a separately formed printing sheet may be bonded to the resin layer 3, or a printing portion of a separately formed printing transfer sheet May be transferred to the surface of the resin layer 3.
The printing layer 5 may be foamed or non-foamed. When the printing layer 5 is foamed, the expansion ratio is preferably 1.2 times to 3.0 times, and more preferably 1.8 times to 2.5 times. If the foaming ratio of the printing layer 5 is too low, it is substantially the same as the non-foaming state. On the other hand, if the foaming ratio of the printing layer 5 is too high, it is easy to wear and the sharp convex parts 7 and concave parts 8 This is because formation becomes difficult.

  Moreover, the thickness of the printing layer 5 is not particularly limited, but in the case of non-foaming, it is preferably 0.03 mm to 0.06 mm.

The protective layer 6 is a thin layer for protecting the surface of the printing layer 5. The protective layer 6 has translucency (transparent or translucent) in order to see through the printed layer 5 provided on the back surface. The protective layer 6 is preferably non-foamed. This is because if the protective layer 6 is foamed, the glossiness of the surface of the protective layer 6 decreases.
The resin component constituting the protective layer 6 is not particularly limited, and is a vinyl chloride resin; an ethylene-vinyl acetate copolymer, a copolymer of ethylene and α-olefin, and an ethylene-alkyl (meth) acrylate copolymer. Ethylene copolymers such as olefin resins such as polypropylene and polyethylene; acrylic resins; resins such as polyamide resins such as 6,6 nylon (including elastomers) alone or in a mixture of two or more Can be used. The protective layer 6 can be formed by applying a resin composition containing the resin component to the surface of the printing layer 5 by a known printing method or coating method.

Although the thickness of the protective layer 6 is not specifically limited, Preferably it is 150 micrometers-200 micrometers. This is because if the thickness of the protective layer 6 is too thin, the surface protection function of the printing layer 5 cannot be sufficiently exhibited, while if the protective layer 6 is too thick, the feel of the flooring 1 becomes hard.
The flooring 1 of the present invention is not limited to the laminate in which the flooring body 4 is laminated with the base material layer 2, the resin layer 3, the printing layer 5 and the protective layer 6 in this order, and can be changed to various modes. it can. For example, the printing layer 5 may be provided on the back surface of the resin layer 3. In this case, in order to visually recognize the printed layer 5 from the front side, the resin layer 3 is formed to have translucency. Further, the flooring main body 1 may be a laminated body that does not have the protective layer 6.

The convex part 7 and the concave part 8 are formed, for example, by pressing a mechanical embossed plate on the surface of the floor material body 4. The planar view shape of the convex part 7 and the recessed part 8 is not specifically limited, It is arbitrary. In the flooring 1 of the present invention, the pattern formed by the convex portions 7 and the concave portions 8 appears clearly due to the difference in gloss between the convex portions 7 and the concave portions 8. For this reason, the planar view shape of the convex part 7 and the recessed part 8 is arbitrarily formed in consideration of the design of the flooring 1.
The plan view shape of the convex portion 7 is preferably a shape having a width that can support the load so that the sole does not contact the bottom surface 8a of the concave portion 8 when a load is applied to the surface of the flooring 1 by the sole or the like. .
In addition, in the case of the flooring main body 4 having the above-described layer configuration, a concavo-convex pattern due to the convex portions 7 and the concave portions 8 is formed on the surface of the protective layer 6.

The height difference between the convex portion 7 and the concave portion 8 (depth from the top surface 7a of the convex portion 7 to the bottom surface 8a of the concave portion 8) is preferably 30 μm to 150 μm, more preferably 50 μm to 100 μm. If this height difference is too small, the concave portion 8 is easily damaged by walking, caster running, etc., and the gloss difference highlighting effect is reduced. Moreover, if this height difference is too large, there is a risk that walking may be hindered or caster running performance may be lowered, and depending on the direction of light, the shadow caused by the convex portion 7 is likely to be reflected on the entire concave portion 8, As a result, the effect of enhancing the pattern due to the difference in gloss may be reduced.
Moreover, the ratio of the area occupied by the convex portion 7 and the area occupied by the concave portion 8 on the surface of the floor material body 4 is preferably 10:90 to 90:10, and more preferably 30:70 to 70:30. This is because if the area occupied by the concave portion 8 is too large, the concave portion 8 is easily damaged, whereas if it is too narrow, the range of the high gloss portion becomes too narrow.

The top surface 7a of the convex part 7 is formed in a rough surface shape. The top surface 7a of the convex portion 7 is formed into a rough surface when the surface of the top surface 7a is formed in a fine concavo-convex shape or when fine particles are attached to the surface of the top surface 7a. Including the case. Since the top surface 7a of the convex portion 7 is thus formed into a rough surface, light is irregularly reflected on the top surface 7a of the convex portion 7, and the top surface 7a of the convex portion 7 has low gloss. Yes. Therefore, the top surface 7 a of the convex portion 7 constitutes a low gloss portion of the flooring 1.
The surface roughness of the top surface 7a of the convex part 7 is not particularly limited, but if it is too rough, it may appear to have high gloss depending on the direction of light reflection, whereas if it is too fine, it will hardly change from a mirror surface. There is. From such a viewpoint, the surface roughness of the top surface 7a of the convex portion 7 (centerline average roughness (Ra) based on JIS B 0601) is preferably 5 μm to 15 μm, more preferably 6 μm to 10 μm. is there. But the surface roughness (Ra) of the top | upper surface 7a of the convex part 7 may exceed 15 micrometers.

On the other hand, the bottom surface 8a of the recess 8 is formed in a mirror shape. The bottom surface 8a of the concave portion 8 is formed into a mirror surface. The surface of the bottom surface 8a has substantially no uneven shape, and most of the light incident on the bottom surface 8a from an oblique direction reflects almost the same as the incident angle. Includes states that can be reflected at the corners. Since the bottom surface 8a of the recess 8 is thus formed in a mirror shape, the light is favorably reflected on the bottom surface 8a of the recess 8, and the bottom surface 8a of the recess 8 is highly glossy. Accordingly, the bottom surface 8 a of the recess 8 constitutes a high gloss portion of the flooring 1.
The bottom surface 8a of the concave portion 8 is formed in a mirror shape, but actually has irregularities at an extremely fine level. The surface roughness (centerline average roughness (Ra) based on JIS B 0601) of the bottom surface 8a of the recess 8 is 6 μm or less, preferably 1 μm to 6 μm, more preferably 2 μm to 4 μm.
The difference between the surface roughness (Ra) of the top surface 7a of the convex portion 7 and the surface roughness (Ra) of the bottom surface 8a of the concave portion 8 (Ra of the convex portion 7−Ra of the concave portion 8) is preferably 5 μm or more. More preferably, it is 10 μm or more.

The flooring 1 can be manufactured, for example, according to the following method.
First, production of an embossed plate for forming an uneven pattern on the surface of the flooring main body 4 will be described.
The embossed plate may have a roll shape or a flat plate shape. Since it is usually suitable for continuous production, an embossing roll is used as the embossing plate.
FIG. 2 is a reference diagram showing the procedure of the embossed plate manufacturing process.
In FIG. 9A, reference numeral 91 denotes an embossed plate. The embossed plate is usually made of metal such as iron, copper, and alloy. Moreover, when using an embossing roll as the embossing plate 91, it is a metal cylindrical body.

The surface of the embossed plate 91 is finished into a mirror surface by polishing ((b) in the figure).
Next, a resist solution 92 is applied to the surface of the embossed plate 91, and a mask pattern 93 is pasted thereon ((c) in the figure). The mask pattern 93 is printed with an image corresponding to the convex portions and concave portions to be formed.

Development is carried out by printing on the mask pattern 93 by means such as ultraviolet irradiation (FIG. 4D). By the development, a resist photosensitive film 94 is formed on the surface of the embossed plate 91.
Next, a corrosive solution 95 is poured over the resist photosensitive film 94 to erode the surface of the embossed plate 91 that is not covered with the resist photosensitive film 94 (FIG. 5E).
After removing the corrosive liquid 95 cleanly, an uneven shape according to the mask pattern 93 is formed on the surface of the embossed plate 91. The concave portion formed on the surface of the embossed plate 91 corresponds to the convex portion 7 of the floor material 1, and the convex portion formed on the surface of the embossed plate 91 corresponds to the concave portion 8 of the floor material 1.

Next, sandblasting is performed from the surface of the embossed plate 91 in a state where the resist photosensitive film 94 is attached to the surface of the embossed plate 91 ((f) in the figure). By the sandblasting, the bottom surface 91a of the concave portion of the embossed plate 91 becomes rough. In addition, since the surface 91b of the convex portion of the embossed plate 91 is covered with the resist photosensitive film 94, the surface 91b of the convex portion of the embossed plate 91 remains in a specular shape even when sandblasting is performed. .
Finally, by removing the resist photosensitive film 94, an embossed plate for forming a flooring material of the present invention can be obtained ((g) in the figure).

  In one embodiment, the flooring 1 is formed in a long shape. The long shape refers to a shape in which the length in one direction is sufficiently longer than the other direction, for example, the length in one direction is 10 times or more the length in the other direction. It is.

FIG. 3 is a reference diagram showing each process of the method for manufacturing a long flooring material.
First, a resin composition 39 for forming a resin layer is applied on the long base material 29. As the long base material 29, for example, a laminate of a long glass fiber nonwoven fabric and a long heat shrinkable nonwoven fabric can be used. As the resin composition 39, for example, a composition containing a foaming agent and containing, for example, paste vinyl chloride as a main component can be used.
The resin composition 39 is smoothed using the coater 11 or the like.
Next, this is passed through a heating device such as the heater 12 to pregel the resin composition 39 and stabilize the resin composition 39.

A printed sheet 59 on which the desired design is printed is bonded to the surface of the pregelled resin composition 39.
As shown in FIG. 3, the print sheet 59 is fed by the supply roll 13, peeled off the release paper, and then bonded to the surface of the resin composition 39. Note that the peeled release paper is wound around the collection roll 14.
Since the resin composition 39 is not completely gelled (pregel), the printing sheet 59 can be easily adhered to the surface of the resin composition 39.
Next, a resin composition 69 that forms a protective layer is applied to the surface of the printing sheet 59. As the resin composition 69, a composition containing, for example, paste vinyl chloride as a main component can be used. The resin composition 69 is smoothed using a coater 15 or the like.

Next, the long base material 29 on which the resin composition 39 and the like are laminated is passed through a heating device such as an oven 16 to completely gel the resin compositions 39 and 69 and foam the resin composition 39. Let The heating temperature and time of the long base material 29 on which the resin composition 39 and the like are laminated are appropriately set according to the type of the foaming agent and the resin, but are usually about 160 to 220 ° C., and the heating time is 2 to 5 minutes.
In this way, the floor material main body long object 19 in which the resin layer, the printing layer, and the protective layer are laminated on the long base material 29 can be obtained.

A convex portion and a concave portion are formed on the surface of the protective layer of the floor material main body long object 19 by performing mechanical embossing. Mechanical embossing can be performed by pressing a rotating embossing roll or pressing an embossed plate. In one embodiment, embossing roll 17 is used because it is suitable for forming flooring.
When pressing the embossing roll 17, it is preferable to slightly heat the surface portion of the floor material main body long object 19 in order to give a clear uneven shape.
For example, the surface of the floor material main body long object 19 may be pressed using the heated embossing roll 17, or the flooring may be used using a separate heating device immediately before pressing the embossing roll 17. The surface portion of the long body 19 may be heated.
Although this heating temperature is suitably set according to the resin component which comprises a flooring main body, it is about 130-180 degreeC normally.

  Sharp embossing and concave portions are formed on the surface by embossing. The long floor material thus obtained is usually wound up on a roll 18 and used for storage and transportation.

In the flooring 1 of the present invention, the top surface 7a of the convex portion 7 becomes a low gloss portion, and the bottom surface 8a of the concave portion 8 becomes a high gloss portion. Due to the difference in gloss between the two portions, the floor material 1 has a clear pattern formed by the convex portions 7 and the concave portions 8. Therefore, the flooring 1 has a good appearance in which the pattern can be clearly seen. Furthermore, since the floor material has a contrast at the boundary portion due to the height difference between the convex portion 7 and the concave portion 8, the gloss difference is more emphasized. In particular, the periphery of the edge of the concave portion 8 appears dark due to the shadow caused by the convex portion 7, whereas the central portion of the concave portion 8 appears bright due to light reflection, and thus the above-described gloss difference can be more emphasized. .
Further, when the flooring 1 is used for a long time, the top surface 7a of the convex portion 7 is damaged, but the bottom surface 8a of the concave portion 8 is hardly damaged.
Since the top surface 7a of the convex portion 7 is formed into a rough surface in the flooring 1, the top surface 7a of the convex portion 7 is low even if the top surface 7a of the convex portion 7 is damaged due to long-term use. The glossy part remains. On the other hand, since the floor material 1 has a mirror-like bottom surface 8a of the recess 8 that is hard to be damaged, the bottom surface 8a of the recess 8 can maintain a high gloss portion even when used for a long time.
Therefore, the flooring 1 does not easily change its appearance even when used for a long period of time, and can maintain a good appearance with a clear pattern as long as the flooring at the beginning of use.

  EXAMPLES Hereinafter, an Example is shown and this invention is explained in full detail. However, the present invention is not limited to the following examples.

The following resin composition A was applied onto a 120 g / m ² glass mat substrate (trade name “WXT100C9” manufactured by Olivest Co., Ltd.), and averaged to a thickness of 0.4 mm with a knife coater.
Next, the surface of the coated resin composition A was heated at 160 to 180 ° C. for 1 minute using a heater to pregelate the resin composition A.

  On the other hand, the printing sheet on which the desired picture was expressed was formed on the release paper by gravure printing the ink on the release paper.

The printed sheet was peeled from the release paper, and this was bonded onto the pre-gelled resin composition A.
Furthermore, the following resin composition B was coated on this printing sheet, and averaged so that it might become thickness 0.2mm with a knife coater.
Next, by heating the laminate of the base material, the resin composition A, the printing sheet, and the resin composition B at 180 to 200 ° C. for 5 minutes using an oven, the resin compositions A and B are completely obtained. Gelation was carried out to foam the resin composition A (foaming ratio 4 times).
Thus, the flooring main body by which the base material, the resin layer, the printing layer, and the protective layer were laminated | stacked was formed.

On the other hand, an embossing roll was prepared in which the bottom surface of the concave portion was formed into a rough surface by sandblasting and the surface of the convex portion was formed into a mirror surface.
Immediately after heating the surface of the flooring main body to 160 ° C. with a heater, the embossing roll (the surface temperature of the embossing roll is 30 ° C. to 40 ° C.) is used to press on the protective layer of the flooring main body. Mechanical embossing was performed.
On the surface of the obtained flooring, a convex portion and a concave portion (depth of the concave portion of 0.05 to 0.08 mm) corresponding to the embossing roll were formed.
When the surface of the flooring was observed, the pattern of the convex part of the flooring looked like a mat and the pattern of the concave part of the flooring was shining.
When the surface roughness of the convex part and concave part of this flooring was measured, Ra of the convex part was 10 μm and Ra of the concave part was 2 μm.
In addition, the surface roughness (Ra) of a convex part and a recessed part was measured by the method based on JISB0601.

(Resin composition A)
PVC resin (paste resin, average polymerization degree 1200): 100 parts by mass.
DOP: 46 parts by mass.
Filler: 34 parts by mass.
Foaming agent: 2.6 parts by mass.
Stabilizer: 0.42 parts by mass.
Others: 2.1 parts by mass.

(Resin composition B)
PVC resin (paste resin, average polymerization degree 1200): 100 parts by mass.
DOP ... 60 parts by mass.
Stabilizer: 2.4 parts by mass.
Others: 0.45 parts by mass.

The partial omission sectional view showing one embodiment of the flooring of the present invention. The reference drawing which shows the production process of an embossed plate. The reference drawing which shows one Embodiment of the manufacturing method of a flooring.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Flooring material, 2 ... Base material layer, 21 ... 1st base material, 22 ... 2nd base material, 3 ... Resin layer, 4 ... Floor material main body, 5 ... Printing layer, 6 ... Protective layer, 7 ... Convex part 7a: top surface of the convex portion, 8 ... concave portion, 8a ... bottom surface of the concave portion

Claims (2)

On the surface of the floor material body, a floor material in which convex portions and concave portions are formed,
The flooring characterized by the top surface of the said convex part being formed in rough surface shape, and the bottom face of the said recessed part being formed in mirror surface shape.   The flooring according to claim 1, wherein the top surface of the convex portion has a surface roughness (Ra) of 5 to 15 µm, and the bottom surface of the concave portion has a surface roughness (Ra) of 6 µm or less.

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