JP6628175B2 - Sheet flooring - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a high design floor material suitable for covering and decorating corridors, balconies, stairs, and the like of apartment houses, stores, buildings, and the like, and ensuring waterproofness and slip resistance.

  A decorative material having a rolled pattern of a laminate composed of a pattern upper layer and a pattern lower layer as a floor material (decorative material) having a rich design property, and a pattern upper layer having a translucent composition containing a transparent filler And a decorative material having a decorative layer obtained by rolling a pattern lower layer together has been proposed (Patent Document 1).

JP 2000-21296 A

  Although the decorative material of Patent Document 1 is described as being able to produce a high-quality pattern at low cost, it is actually only a random pattern formed, and a desired shape and a desired shape are formed at a desired position. It is difficult to form a pattern with a hue, and for example, there is a problem that a tile pattern having joints cannot be formed.

  The present invention has been made to address the above problem, and provides a color difference between a thick region and a thin region formed in an upper layer, thereby providing a floor having a color difference between a concave portion and other regions. It is an object of the present invention to provide a flooring material having a novel design feeling, such as a flooring material, or a flooring material having a color difference between a convex portion and other regions, for example, a flooring material having a tile pattern provided with joints recessed from a general surface. The purpose is.

  For example, when a flooring having a tile pattern with joints is to be manufactured, a film of a synthetic resin or the like printed by providing a color difference between a region corresponding to the joints and another region is laminated on the original flooring sheet. There has been known a method of performing hot press molding with an embossing die that is integrated and a portion corresponding to a joint has a convex portion. However, in this case, if the projections of the mold and the joints of the print film are not matched, a floor material with a blurred pattern is obtained, so that the projections of the mold and the joints of the film exactly match. Would be quite difficult. Printed film and raw flooring sheets are often made of synthetic resin, so they expand and contract under the influence of heat, causing misalignment and wrinkling of the film during pressing. In addition to the problems of low stability and low production yield, there is also the problem that the use of a print film is expensive.

In order to achieve the above object and to solve the problems, the flooring material according to the present invention is a flooring material in which at least an upper layer and an underlayer are laminated, and the upper layer is colored with a composition mainly composed of a synthetic resin. It is a visible light transmissive layer in which a material is blended, and a thick region and a thin region are formed in the upper layer , and the upper layer has a thickness difference between the thick region and the thin region. , There is a color difference between the thick region and the thin region due to the difference in visible light transmission .

In the flooring material of the present invention, it is desirable that the color difference between the thick region and the thin region is 3 or more. The numerical value of the color difference is a numerical value calculated based on JIS Z 8730.
Further, it is desirable that the visible light transmittance of the upper layer be 20 to 65% at a thickness of 0.3 mm. This visible light transmittance is a light transmittance in a wavelength region of 380 to 780 nm obtained based on JIS R 3106.

Further, the ratio of the thickness of the thick region to the thickness of the thin region (thickness of the thick region / thickness of the thin region) is desirably 1.5 to 10, and specific thicknesses include: It is desirable that the thickness of the thick region be 0.7 to 2.0 mm and the thickness of the thin region be 0.1 to 0.6 mm.
The “thickness of the thick region” means the thickness of the thick region when the thickness is constant, and the thickest region of the thick region when the thickness of the thick region is not constant. Means the thickness. That is, when there are fine irregularities or satin finish on the surface of the thick region, the top of the fine convex portion or the satin convex portion is set as the thickness of the thick region. The “thickness of the thin region” means the thickness of the thin region when the thickness of the thin region is constant, and the thickness of the thinnest region when the thickness of the thin region is not constant. This means that the details are the same as in the case of the thick region.

Like the flooring material of the present invention, when a thick region and a thin region are formed in the visible light-transmitting upper layer in which a coloring material is blended with a composition mainly composed of a synthetic resin, The difference in the visible light transmittance to the underlayer due to the difference in the thickness causes a color difference between the thick region and the thin region. In other words, in the thick region where the visible light transmittance is low, the color of the coloring material contained in the upper layer appears dominantly, and the color of the underlying layer is almost hidden by the upper layer. In the thin region where the visible light transmittance is high, the color of the underlayer appears more predominantly than the color of the coloring material, and the hue is close to the color of the underlayer. A color difference occurs between the thin region and the thin region. Therefore, by selecting desired colors different from each other as the colorant and the color of the base layer included in the upper layer, and forming the thick region and the thin region into a desired shape, a desired color difference is obtained at a desired position with a desired color difference. Forming a pattern having a shape, and a flooring material having a novel design feeling in which the pattern due to the color difference and the pattern due to the unevenness can be obtained, the flooring material having a color difference between the concave portion and the other region, or A flooring material having a color difference between the convex portion and the other region, for example, a flooring material having a tile pattern with joints can be easily obtained. And since a printed film is not used, the finished product is beautiful, the production yield is good, and a floor material with high design can be manufactured at low cost.
Further, as in the flooring material of the present invention, when the upper layer is a layer in which a coloring material is blended with a composition containing a synthetic resin as a main component, the upper layer can exhibit waterproofness because it is impermeable to water. In addition, since the thick region and the thin region are formed in the upper layer, the unevenness can also exert the slip resistance.

  In the flooring material of the present invention, when the color difference between the thick region and the thin region is 3 or more, the pattern formed by the thick region and the thin region can be clearly recognized by the color difference, and the pattern can be clearly seen. Therefore, there is an advantage that the design property is further improved.

  Further, when the visible light transmittance of the upper layer is 20 to 65% at a thickness of 0.3 mm, there is an advantage that the color difference between the thick region and the thin region becomes clear and a clear pattern can be formed.

  Further, when the ratio of the thickness of the thick region to the thickness of the thin region (thickness of the thick region / thickness of the thin region) is 1.5 to 10, the thickness of the thick region is 0. When the thickness is 0.7 to 2.0 mm and the thickness of the thin region is 0.1 to 0.6 mm, the color difference between the thick region and the thin region becomes clearer and a clearer pattern can be formed. Has the advantage of being further improved.

It is a partial top view by a photographic image of flooring concerning one embodiment of the present invention. It is a fragmentary sectional view of the floor material. It is a fragmentary sectional view of a flooring concerning another embodiment of the present invention.

  Hereinafter, a floor material according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a partial plan view according to a photographic image of the flooring T ₁ according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of the flooring T _1.

Flooring T ₁ according to this embodiment, combined with the formation 1 on a visible light-transmissive colored member is added to the resin composition composed mainly of a visible light impermeable colored in chromatic or achromatic And an upper ground layer 1 having a thick region 1A having a square planar shape such as a tile piece, and a groove-like shape intersecting vertically and horizontally like a joint. A thin region 1B is formed.

  In the thick region 1A where the visible light transmittance is lower than the thin region 1B, the color of the coloring material added to the composition forming the upper layer 1 appears predominantly, and the color of the base layer 2 is considerably hidden. The thick region 1A has a hue close to the color of the coloring material. On the other hand, in the thin region 1B where the visible light transmittance is higher than the thick region 1A, the underlying layer 2 is hardly concealed and the color of the underlying layer 2 appears predominantly. ing. Therefore, a color difference occurs between the thick region 1A and the thin region 1B.

Flooring T ₁ according to this embodiment includes a stratum 1 on a visible light-transmissive blended with colorant light color to the composition of the synthetic resin as a main component, a base layer 2 made of a dark synthetic resin To form a thick region 1A having a light color such as a square tile piece and a thin region 1B having a dark color such as a groove-like joint intersecting vertically and horizontally by embossing or the like. As shown in the plan view of the photographic image of FIG. 1, a tile pattern having a sharp and novel design feeling in which the pattern due to the color difference and the pattern due to the unevenness of both areas 1A and 1B are provided on the flooring surface. Things.
On the other hand, the flooring material in which the upper layer is a colored layer (light color layer) that does not transmit visible light has the same hue as the thick area because the underlying layer is concealed even in the thin area. since the color difference hardly occurs between the regions, only tile pattern by mere irregularities are formed, as described above flooring T _1, by patterns and irregularities due to color difference between the thick region 1A and the thin region 1B It is impossible to form a tile pattern having a clear and novel design that matches the pattern.

Examples of the composition comprising the above-mentioned synthetic resin as a main component constituting the upper layer 1 (hereinafter, referred to as a synthetic resin composition) include a soft or hard vinyl chloride resin or polyolefin excellent in visible light transmittance (transparency). A composition comprising a thermoplastic synthetic resin such as a resin as a main component, and appropriately adding a visible light transmitting plasticizer, a stabilizer, a processing aid, and other additives (excluding a coloring material) is suitable. In particular, a composition mainly composed of a soft vinyl chloride resin excellent in visible light transmittance, moldability, flexibility required for flooring, abrasion resistance and the like is preferably used. The composition containing a soft vinyl chloride resin as a main component desirably contains a plasticizer and a stabilizer in a total amount of 25 to 50% by mass.
In the synthetic resin composition constituting the upper layer 1, an appropriate amount of a filler such as calcium carbonate or talc is used within a range that does not impair the visible light transmittance (up to 30 parts by mass with respect to 100 parts by mass of the synthetic resin composition). ) May be added to improve the heat resistance, weather resistance, strength, economy by increasing the amount, and the like of the upper layer 1.

As the colorant to be added and blended into the above synthetic resin composition, the following inorganic pigments and organic pigments are used alone or in a suitable mixture. In addition, pigments that become inorganic and organic hybrids, phosphorescent pigments, dyes, and the like can also be used.
(1) Inorganic pigment White pigment: zinc white, lead white, lithopone, titanium dioxide, precipitated barium sulfate, barite powder Red pigment: lead red, iron oxide red Yellow pigment: graphite, zinc yellow (one kind of zinc yellow, 2 types of zinc yellow)
Blue pigment: Ultramarine blue, Prussian blue (potassium ferrocyanide)
Black pigment: carbon black (2) organic pigment Yellow polycyclic pigment: isoindolinone, isoindoline, azomethine, anthraquinone, anthrone, xanthene Orange polycyclic pigment: diketopyrrolopyrrole, perylene, anthraquinone (anthrone), perinone, quinacridone , Indigoid red polycyclic pigment: quinacridone, diketopyrrolopyrrole, anthraquinone, perylene, perinone, indigoid purple (violet) polycyclic pigment: dioxazine, quinacridone, perylene, indigoid, anthraquinone (anthrone), xanthene blue polycyclic pigment: phthalocyanine , Anthraquinone, indigoid, green polycyclic pigment: phthalocyanine, azomethine, perylene azo pigment: monoazo lake, monoazo type, disazo type Those having a particle size is preferably used.

  It is important that the compounding amount of the coloring material is 0.01 to 1.0 part by mass with respect to 100 parts by mass of the synthetic resin composition. If the amount of the coloring agent is less than 0.01 parts by mass, the hiding effect of the underlayer 2 by the thick region 1A of the upper layer 1 is significantly reduced, and the hue close to the underlayer in both the thick region 1A and the thin region 1B. As a result, the color difference becomes small, and it becomes difficult to form a clear tile pattern due to a large color difference between the thick region 1A and the thin region 1B. On the other hand, when the compounding amount of the coloring material exceeds 1.0 part by mass, the visible light transmittance (visible light transmittance) of the thin region 1B of the upper layer 1 is significantly reduced, and both the thick region 1A and the thin region 1B are reduced. Since the hue is close to the upper layer 1 and the color difference is small, it is also difficult to form a clear tile pattern.

  In order to form a clear tile pattern, the amount of the coloring material is appropriately increased or decreased within the range of 0.01 to 1.0 part by mass, and as described later, the thickness of the thick region 1A and the thickness of the thin region 1A are reduced. It is desirable that the color difference between the thick region 1A and the thin region 1B is 3 or more by appropriately increasing or decreasing the thickness of the region 1B. If the color difference between the thick region 1A and the thin region 1B is less than 3, the pattern formed by the color difference between the thick region 1A and the thin region 1B will be blurred and will be an unclear pattern with poor contrast.

  The hue (color of the colorant) of the upper layer 1 is not particularly limited, and the colorant may be variously selected and blended with the synthetic resin composition to obtain a desired hue. Is desirably a hue that produces a large color difference according to the relationship For example, if the hue of the underlayer 2 is white or black, the upper layer 1 is desirably a dark or light hue such that the color difference from the underlayer 2 is 8 to 80.

The visible light transmittance of the upper layer 1 is desirably 20 to 65% when the thickness is 0.3 mm. When the visible light transmittance is less than 20%, the visible light transmittance of the thin region 1B of the upper layer 1 is reduced, the hue of the underlayer 2 is considerably hidden, and the thin region 1B is also close to the hue of the thick region 1A. Because of the hue, the color difference between the thick region 1A and the thin region 1B becomes small, and it becomes difficult to form a clear tile pattern. On the other hand, if the visible light transmittance exceeds 65%, the visible light transmittance of the thick region 1A becomes too high, and it becomes difficult to conceal the hue of the underlayer 2, and the thick region 1A is also close to the hue of the thin region 1B. Because of the hue, the color difference between the thick region 1A and the thin region 1B is also small, making it difficult to form a clear tile pattern.
Therefore, in order to form a clear tile pattern, a synthetic resin having good visible light transmittance is selected as a main resin of the synthetic resin composition constituting the upper layer 1, and the kind and amount of the coloring material are selected. It is important that the visible light transmittance of the upper ground layer 1 when the thickness is 0.3 mm is 20 to 65% by adjusting the thickness.

  Although the ratio of the thickness of the thick region 1A to the thickness of the thin region 1B (thickness of the thick region 1A / thickness of the thin region 1B) is not particularly limited, the color difference between the two regions 1A and 1B, the upper layer 1 From the viewpoint of the amount of the synthetic resin composition used, the strength, and the like, it is desirable that the ratio is 1.5 to 10. When the above ratio is less than 1.5, the difference between the visible light transmittance of the thick region 1A and the visible light transmittance of the thin region 1B becomes small, and the color difference between the thick region 1A and the thin region 1B decreases. Therefore, it is difficult to form a clear tile pattern. On the other hand, when the above ratio is more than 10, a clear tile pattern can be formed, but the thick region 1A becomes too thick and the amount of the synthetic resin composition used becomes excessive, or the thin region 1B becomes thin. This is not preferable because the strength of the thin region 1B is reduced.

The thickness of the thick region 1A and the thickness of the thin region 1B are not particularly limited, but the visible light transmittance (visible light transmittance at a thickness of 0.3 mm) of the upper layer 1 is 20 to 65% as described above. In this case, the thickness of the thick region 1A is set to about 0.7 to 2.0 mm, while the thickness of the thin region 1B is set to about 0.1 to 0.6 mm. It is desirable to set the ratio of the thickness of the thick region 1A to the thickness 1B within the range of 1.5 to 10 as described above. By doing so, it is possible to obtain a flooring material having a clear tile pattern in which the amount of use of the synthetic resin composition containing the coloring material is not excessive and the color difference between the thick region 1A and the thin region 1B is large. Can be.
For reference, the visible light transmittance of the thick region 1A having a thickness of 0.7 to 2.0 mm is about 0.1 to 55%, and the visible light transmittance of the thin region 1B having a thickness of 0.1 to 0.6 mm. Is about 25 to 80%, and the visible light transmittances of both regions 1A and 1B partially overlap. Therefore, the ratio of the thickness of the thick region 1A to the thin region 1B is set to 1.5 as described above. By adjusting the thickness within the range of 10 to 10, the visible light transmittance of the thin region 1B is made larger than the visible light transmittance of the thick region 1A, and a sufficient color difference between the thin region 1B and the thick region 1A is obtained. It needs to happen.
The meaning of “thickness of thick region 1A” and the meaning of “thickness of thin region 1B” are as defined above.

In the flooring material of this embodiment, a tile pattern is formed on the entire surface of the upper layer 1, but the thick region 1 </ b> A and the thin region 1 </ b> B having different planar shapes are formed for each predetermined range of the upper layer 1. Of course, a different pattern may be provided for each predetermined range on the surface of the formation 1.
In addition, in the flooring material of this embodiment, the entire upper layer 1 is formed to be uniform and the same color by the synthetic resin composition to which the coloring material is added. When adopting a molding method in which resin powders and chips are laminated and hot pressed, a plurality of hues are applied to the surface by using a plurality of types of powders and chips in which a coloring material of a different color is added to a synthetic resin composition. May be formed to further improve the design property. However, these powders and chips need to satisfy the above-mentioned visible light transmittance.
In some cases, a large portion (70% or more in volume ratio) of the upper layer 1 is a portion having the above-described visible light transmittance, and other portions (including a thin region) are powders having no visible light transmission. Chips, mica, mica, metal powder, wood powder, and the like may be included to locally form a different opaque pattern.
Further, a pattern is provided by forming a thick region 1A and a thin region 1B having different color differences in a predetermined range of the upper layer 1, and the other range of the upper layer 1 is provided with the same pattern or no pattern as the conventional floor. It may be formed in a flat area, and various patterns of design may be combined in the upper layer 1 of one flooring material.

The base layer 2 of the flooring material 1 according to this embodiment is mainly composed of the same synthetic resin or a compatible synthetic resin as the main resin of the synthetic resin composition constituting the upper layer 1, and the above-described additive (coloring). This is a substantially flat layer formed of a composition to which a material is added and a filler is appropriately added, and is colored in a different hue from that of the upper layer 1 by blending a coloring material .

  The filler is blended for the purpose of ensuring the strength, thermal stability, weather resistance, and the like of the underlayer 2 and improving the economic efficiency by increasing the amount thereof. Calcium carbonate and talc are preferably used. The desirable compounding amount of the filler is less than 130% by mass with respect to 100 parts by mass of the synthetic resin composition of the underlayer 2, and may be omitted if unnecessary.

  As the coloring material to be blended in the synthetic resin composition of the underlayer 2, the above-mentioned inorganic or organic pigments, pigments that are hybrids thereof, phosphorescent pigments, dyes and the like are used. It is desirable to use a pigment because it is necessary to have a concealing property capable of almost concealing the floor base surface (laying surface) when the floor material 1 is laid. Needless to say, the concealing property (visible light transmittance) of the base layer 2 may be adjusted by using a dye and a pigment together or using a filler together.

The hue of the underlayer 2 is not particularly limited, but a hue that produces a large color difference in relation to the upper layer 1 is desirable. In that sense, the hue of the underlayer 2 is white by blending an inorganic white pigment such as titanium oxide. It is desirable to make the color black by blending an inorganic black pigment such as carbon black. Incidentally, the hue of the underlayer 2 containing 1.0 part by mass of titanium oxide with respect to 100 parts by mass of the synthetic resin composition of the underlayer 2 is L ^* = 91.06, a ^* = 0.50, b ^* = The underlayer 2, which is 5.29 in white and has 0.5 parts by mass of carbon black, has L ^* = 33.02, a ^* =-0.16, and b ^* =-1.10. Since the base layer 2 is black, the hue of the upper layer 1 is made darker with respect to the white base layer 2 and the hue of the upper layer 1 is made lighter with respect to the black base layer 2. A large color difference can be generated between

The underlayer 2 has a substantially flat back surface, and an upper ground layer 1 having a thick region 1A and a thin region 1B formed on the front surface is integrally laminated on the front surface. In flooring T ₁ of the this embodiment, is also a surface of the undercoat layer 2 is a flat surface, and the surface of the base layer 2 to form a recessed region and a convex region, protruding on the back side of the upper base layer 1 formed The upper layer 1 and the lower layer 2 are laminated by overlapping the thick region formed on the concave region of the lower layer 2 and the thin region formed by recessing the lower surface of the upper layer 1 on the convex region of the lower layer 2. They may be integrated. In this case, the surface of the upper layer 1 may be a flat surface, but irregularities may be formed on the surface of the upper layer 1 within the scope of the present invention.

  When the underlayer 2 and the upper layer 1 having the thick region 1A and the thin region 1B formed in this manner are laminated, the visible light transmitted from the upper layer 1 that is transparent to visible light is substantially non-visible. 2 and exits from the upper layer 1 again, the hue of the underlayer 2 is visually recognized through the upper layer 1 with the naked eye. At this time, the thick region 1A and the thin region 1B of the upper layer 1 The visible light transmittance differs depending on the thickness difference between the base layer 2 and the upper layer 1 in the thin region 1B having a high visible light transmittance and the thick region 1A having a low visible light transmittance. The hue is predominantly recognized, and a color difference is generated between the thick region 1A and the thin region 1B, and the floor having a novel design feeling in which the pattern due to the color difference matches the concave and convex pattern due to both regions 1A and 1B. The material can be obtained.

  The thickness of the underlayer 2 is not particularly limited, but is preferably about 0.5 to 3 mm because it is the underlayer of the floor material.

Flooring T ₁ of the this embodiment is to form a thick region 1A having a square planar shape such as a tile piece, a groove-shaped thin region 1B intersecting lengthwise and crosswise like joints, both regions 1A, Although a clear tile pattern is provided on the floor material surface by the color difference of 1B, a desired pattern other than the tile pattern may be formed by changing the planar shape of the thick region 1A and the thin region 1B. Needless to say.
Further, by forming the thick region 1A and the thin region 1B at random and changing the thickness of the thin region 1B, a stone pattern or a wood pattern such as marble may be formed. By providing a slope on the side surface (boundary surface) of the region 1A and the thin region 1B, the visible light transmittance at the boundary between the two regions 1A and 1 is gradually changed so that a hue gradation is generated at the boundary. You may.
Further, on the surface of the upper layer 1, fine embossed or riko ground may be formed for the purpose of improving anti-slip property, drainage property, design feeling and texture.

Flooring T ₁ of the above-described structure, powder molding, calender molding, extrusion molding, or a combination thereof, or laminated by molding separately stratum 1A and the base layer 1B over the predetermined thickness, or It can be easily manufactured by simultaneously molding in a laminated state, and transferring and forming the unevenness on the surface of the upper layer 1A using a roll or a mold provided with the unevenness.
Also, after forming the upper layer 1A and forming irregularities on the surface thereof, the upper layer 1A may be laminated and integrated with the underlying layer 1B, and in some cases, may be manufactured by two-color injection molding.

Figure 3 is a partial cross-sectional view of the flooring T ₂ according to another embodiment of the present invention.

The flooring T ₂ are, the intermediate layer 3 is provided between the upper base layer 1 and the underlying layer 2. The intermediate layer 3, there is provided for increasing the dimensional stability and strength of the flooring T _2, glass fibers and synthetic resin fibers of woven or non-woven, or matrix in these woven or nonwoven This is a layer impregnated with a resin, and the matrix resin is fused and integrated into the upper layer 1 and the lower layer 2.

  The matrix resin of the intermediate layer 3 is preferably the same resin as the main resin constituting the upper layer 1A and / or the underlayer 1B or a resin compatible therewith. Specifically, a vinyl chloride resin, vinyl acetate Resins, polyolefin resins, epoxy resins, acrylic resins, unsaturated polyester resins and the like are used.

The preferred thickness of the intermediate layer 3 is 200 to 1000 μm, the preferred basis weight of the woven or nonwoven fabric of glass fiber or synthetic resin fiber is 20 to 500 g / m ² , and the preferred basis weight of the matrix resin is 50 to 500 g / m ^2. a m ^2. When the thickness and basis weight is below the above range, the dimensional stability and strength of the flooring T ₂ becomes difficult sufficiently enhanced, and if the thickness or weight per unit area exceeds the above range, hardens the flooring T ₂ This leads to a disadvantage that flexibility or flexibility is lowered.

  The intermediate layer 3 may be a visible light transmissive colorless layer, or a black, white, red, brown, green or other coloring material mixed with a matrix resin to prevent visible light from being transmitted or visible light. It may be a transparent colored layer. In this way, when the intermediate layer 3 is a colorless layer that transmits visible light, the thin region 1B exhibits a hue close to that of the base layer 2, and when the intermediate layer 3 is a colored layer that does not transmit visible light. When the thin region 1B has a hue close to that of the intermediate layer 3, and when the intermediate layer 3 is a colored layer that transmits visible light, the thin region 1B has a hue close to the color mixture of the intermediate layer 3 and the base layer 2. It is possible to form a variety of color difference patterns in which the combinations of the hues of the region 1B and the thick region 1A are variously different.

Since this other configurations of flooring T ₂ are a similar flooring T ₁ described above, the description thereof is omitted.

  Next, more specific examples and comparative examples of the present invention will be described.

[Example]
As a base layer, a black vinyl chloride resin sheet (thickness: 1 mm) was used, a transparent glass fiber nonwoven fabric (basis weight: 25 g / m ² ) was stacked thereon as an intermediate layer, and further as an upper ground layer, By laminating a light-colored vinyl chloride resin sheet containing 1.1 to 0.008 parts by mass of a pigment on 100 parts by mass of the vinyl chloride resin composition shown in Table 1 below, and performing press molding with an embossing mold, The tile material-containing floor material sample No. 1 having a tile-shaped thick region having a thickness of 1 mm and a joint-shaped thin region having a thickness of 0.3 mm formed in the stratum. 1 to 7 were produced. The pigment to be mixed with the vinyl chloride resin composition in the upper layer is titanium oxide (white), iron oxide (yellow), carbon black (black), and iron oxide (brown) in a mass ratio of 0.700: 0. A light-colored mixed pigment mixed to give a ratio of 160: 0.120: 0.032 was used.
In addition, as shown in Table 1 below, a tile-patterned pattern was formed in the same manner as above except that a vinyl chloride resin sheet in which a pigment and a filler (calcium carbonate) were blended was used as the upper layer. Floor material sample No. 8 was produced.

These floor material sample Nos. For each of 1 to 8, L ^* , a ^* , and b ^* of the thick region and the thin region were measured using a color difference meter (manufactured by Konica Minolta, CM-3600d) to determine ΔL ^* , Δa ^* , Δb ^* , The color difference (ΔE ^* ) between the thick region and the thin region was calculated based on JIS Z 8730. The results are shown in Table 1 below.
Further, using a spectrophotometer (manufactured by Shimadzu Corporation, UV-3100PC), the floor material sample No. The visible light transmittance at a thickness of 1 mm (light transmittance in a wavelength region of 380 to 780 nm) and the visible light transmittance at a thickness of 0.3 mm of the vinyl chloride resin sheet used as the upper layer of 3 to 6 were determined according to JIS R. 3106. The results are shown in Table 1 below.

  Further, the floor material sample No. The tile pattern on the surface of Nos. 1 to 8 was observed and evaluated with the naked eye. When it was evaluated that the contrast between the thick area and the thin area was high and the boundary pattern was clear and the clear tile pattern was formed, the evaluation was "〇". When the contrast between the thick region and the thin region was evaluated to be medium and the boundary pattern was not so clear and the tile pattern with the medium sharpness was formed, the evaluation was "△", and the contrast between the thick region and the thin region was low. When it was evaluated that the boundary pattern was unclear and an unclear tile pattern was formed, the evaluation result was described in Table 1 below as “×”.

[Comparative example]
As the upper layer, floor material sample No. 8, except that 100 parts by mass of the same vinyl chloride resin composition as the upper layer vinyl chloride resin composition was blended with 25 parts by mass of a filler (calcium carbonate), and a vinyl chloride resin sheet prepared without pigment was used. , Floor material sample No. In the same manner as in Nos. 1 to 8, comparative floor material sample Nos. 9 was produced.
This floor material sample piece No. Similarly to 9 above, the color difference between the thick region and the thin region was calculated, and the tile pattern was evaluated with the naked eye. The results are shown in Table 1 below.

According to Table 1, as an upper layer, a floor material sample No. No. in which a vinyl chloride resin sheet in which a pigment was blended in a range of 0.01 to 1 part by mass with 100 parts by mass of a vinyl chloride resin composition was laminated. Each of 2 to 6 has a color difference between the thick region and the thin region of 1 or more, and the naked eye evaluation of the tile pattern is “〇” or “△”, and the tile pattern has a clear and novel design feeling. It can be seen that a tile pattern having a medium design and a novel design feeling can be formed.
On the other hand, as the upper layer, a floor material sample No. having a vinyl chloride resin sheet obtained by laminating 1.1 parts by mass of a pigment with 100 parts by mass of a vinyl chloride resin composition was laminated. Sample No. 1 was a floor material sample No. 1 in which a vinyl chloride resin sheet in which 0.008 parts by mass of a pigment was blended with 100 parts by mass of a vinyl chloride resin composition was laminated as an upper layer, because the amount of the pigment was excessive. In No. 7, since the compounding amount of the pigment was too small, the color difference between the thick region and the thin region was less than 1, and the visual evaluation of the tile pattern was "x", and only an unclear tile pattern was formed. .
From the above, it can be seen that the preferable blending amount of the pigment is 0.01 to 1.0 part by mass based on 100 parts by mass of the vinyl chloride resin composition. It can also be seen that the minimum color difference between the thick region and the thin region is one or more. In particular, the floor material sample No. In the case where the color difference between the thick region and the thin region is 3 or more, such as 3 to 5, the visual evaluation of the tile pattern is “〇”, which indicates that the tile pattern has a clear and novel design feeling. It can be seen that it is important to make the color difference 3 or more in order to form.

  In addition, the floor material sample No. 1 in which the visible light transmittance in the thin region (thickness 0.3 mm) of the upper layer (vinyl chloride resin sheet) exceeds 65%. No. 6 is a floor material sample No. 6 in which the visual evaluation of the tile pattern is “片”, but the visible light transmittance of the thin region (thickness: 0.3 mm) is in the range of 20 to 65%. In all of Nos. 3 to 5, the visual evaluation of the tile pattern is “Δ”. From this, in order to form a tile pattern having a clear and novel design feeling, it is important that the visible light transmittance at a thickness of 0.3 mm of the upper layer (vinyl chloride resin sheet) be 20 to 65%. It turns out that it is.

  In addition, a floor material sample No. 1 containing 10 parts by mass of a filler (calcium carbonate) in addition to the pigment. In No. 8, since the visible light transmittance of the upper layer (vinyl chloride resin sheet) is not significantly reduced by the filler, a color difference of 2.1 occurs between the thick region and the thin region, and the visual evaluation of the tile pattern is " Δ ”. From this, it can be seen that it is possible to increase the amount by adding a filler within a range in which the visible light transmittance of the upper layer does not significantly decrease, thereby suppressing the amount of resin used and improving the economic efficiency.

  On the other hand, a comparative floor material sample No. No. containing only 25 parts by mass of the filler (calcium carbonate) without containing any pigment in the upper layer. In 9, the upper layer is a layer that is substantially impermeable to visible light, the thick layer and the thin area are concealed by the upper layer, and there is almost no color difference between the thick and thin areas. Therefore, the visual evaluation of the tile pattern is “x”, and it can be seen that only a simple tile pattern due to the unevenness of the thick region and the thin region can be formed.

1 upper base layer 1A thick region 1B thin area 2 undercoat layer 3 intermediate layer T _{1, T 2} flooring

Claims (3)

A sheet-like flooring material in which at least an upper layer and a base layer are laminated,
The underlayer is a layer mainly composed of a thermoplastic synthetic resin,
The upper layer is a visible light transmitting layer in which a coloring material is blended with a composition mainly composed of a thermoplastic synthetic resin,
A thick region and the thin region irregularities on the upper base layer by hot pressing only upper base layer using a roll or mold provided with concave convex is formed,
The visible light transmittance of the upper formation is 20 to 65% at a thickness of 0.3 mm,
A ratio of the thickness of the thick region to the thickness of the thin region (thickness of the thick region / thickness of the thin region) is 1.5 to 10,
A sheet-like flooring material characterized in that there is a color difference between the thick region and the thin region due to a difference in visible light transmission to the underlying layer due to a difference between the thickness of the thick region and the thickness of the thin region of the upper layer. .   The sheet-like flooring according to claim 1, wherein a color difference between the thick region and the thin region is 3 or more.   3. The sheet according to claim 1, wherein the thickness of the thick region is 0.7 to 2.0 mm, and the thickness of the thin region is 0.1 to 0.6 mm. 4. Flooring.