JP2005287737A - Reversible color-changing playing mat, and reversible color-changing playing mat set using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembling type playing mat which is provided with playing property and intellectual training property which cannot be realized by a conventional playing mat, which can be used permanently and which can promote creativity of an infant by realizing writing characters and drawing picture patterns on the playing mat assembled in the state of a plane or a solid. <P>SOLUTION: This color-changing playing mat is obtained by providing a porous layer on the surface of a playing mat consisting of plate-like foamed bodies which can be connected with each other. The porous layer is obtained by fixing a pigment of a low index of refraction to binder resin in dispersion state, and the transparency of the layer in a state of sucking water is different from that in a state of not sucking water. A color-changing playing mat consists of the color-changing playing mat and a water-sticking means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a reversible color-changing play mat for an infant to play by placing on a floor, and a reversible color-change play mat set using the same.

Conventionally, as a mat for an infant to play, an assembly type playground equipment mat that can be connected to each other around a mat made of an elastic material such as urethane has been disclosed (for example, see Patent Document 1).
The mat for playground equipment is used by an infant as an exercise mat or assembled into a shape of a house or the like, but it cannot be used for anything else, and sometimes it gets tired.
Also, once assembled, it is often left in the room in that state, and there are few elements that can be reassembled into another form for practical use.
Japanese Utility Model Publication No. 5-7256

  The present invention is not only used as a mat or assembled into various three-dimensional shapes, but also by providing a reversible color changing portion (porous layer) on the mat, a game that cannot be achieved with a conventional game mat. It is intended to provide an assembly-type play mat having a sex and an intellectual property and a play mat set using the same.

In the present invention, a low-refractive-index pigment is fixed to a binder resin in a dispersed state on a surface of a play mat composed of a plurality of mutually connectable foams, and the transparency is different between a liquid-absorbing state and a non-liquid-absorbing state. A reversible color-changing play mat provided with a porous layer is a requirement.
Furthermore, the hardness of the foam is 3 to 90, the tensile strength of the foam is 0.5 or more, and the surface area of the porous layer provided on the mat surface is 50 to 10,000 cm ^2. A cloth or a plastic film is interposed between the plate-like foam and the porous layer, the cloth is selected from a woven fabric, a knitted fabric, a braid, and a non-woven fabric, and the cloth or the plastic film and the porous layer are It is formed by interposing a colored layer in between, the play mat is square, an uneven connecting portion is provided on each side of the play mat, and the porous layer is visible in a liquid-absorbing state. It is a requirement to be composed of two or more mats with different color tones.
Furthermore, a reversible color-changing game mat set comprising the reversible color-changing game mat and water adhering means is required.

The present invention is not only used as a mat, or assembled into various three-dimensional shapes, but also provided with a reversible discoloration portion (porous layer) on the mat so that it is assembled into a flat or three-dimensional shape. Because it is possible to draw characters and designs repeatedly, it has a playability and intellectual property that cannot be achieved with conventional playmats, it can be used permanently, and it can nurture the creativity of infants. Can provide.
Moreover, since it can accelerate | stimulate and use it for another form again, the applicability of an assembly-type play mat can also be improved.

The porous layer formed on the foam of the mat is a layer in which a low refractive index pigment is fixed in a dispersed state together with a binder resin.
Examples of the low refractive index pigment include silicic acid and salts thereof, barite powder, barium sulfate, barium carbonate, calcium carbonate, gypsum, clay, talc, alumina white, magnesium carbonate, and the like. It is in the range of 1.8, and when the liquid composition is absorbed, good transparency is exhibited.
Examples of the silicic acid salt include aluminum silicate, aluminum potassium silicate, sodium aluminum silicate, aluminum calcium silicate, potassium silicate, calcium silicate, calcium sodium silicate, sodium silicate, magnesium silicate, and magnesium potassium silicate.
The particle size of the low refractive index pigment is not particularly limited, but 0.03 to 10.0 μm is preferably used.
Two or more of the low refractive index pigments can be used in combination.
In addition, silicic acid is mentioned as a low refractive index pigment used suitably.
The silicic acid may be silicic acid produced by a dry process, but silicic acid produced by a wet process (hereinafter referred to as wet process silicic acid) is particularly effective and satisfies practicality.
This point will be described below.
Silicic acid is produced as amorphous amorphous silicic acid, and according to its production method, a dry process using a gas phase reaction such as thermal decomposition of silicon halide such as silicon tetrachloride (hereinafter referred to as dry process silicic acid) In general, the wet process silicic acid is the most suitable for the purpose of functioning as the porous layer intended by the present invention, although the wet process uses a liquid phase reaction such as decomposition by acid such as sodium silicate. .
This is because the dry process silicic acid and the wet process silicic acid have different structures, and the dry process silicic acid forms a three-dimensional structure in which the silicic acid is closely bound, whereas the wet process silicic acid is a long molecule formed by condensation of silicic acid. It has a so-called two-dimensional structure part that forms an array.
Therefore, since the molecular structure becomes rough compared to the dry method silicic acid, when wet method silicic acid is applied to the porous layer, it is excellent in the diffused reflection of light in the dry state compared to the system using the dry method silicic acid, Therefore, it is guessed that the concealment property in a normal state becomes large.
In addition, since the porous layer of the present invention absorbs water, the wet process silicic acid has more hydroxyl groups present as silanol groups on the particle surface than the dry process silicic acid, and has a high degree of hydrophilicity. And is preferably used.
In addition, in order to adjust the concealability in the normal state of the porous layer and the transparency in the liquid absorption state, other general-purpose low-refractive-index pigments can be used in combination with the wet method silicic acid.

The wet process silicic acid in the porous layer depends on properties such as particle size, specific surface area, oil absorption, etc., but in order to satisfy both the concealing property in the normal state and the transparency in the liquid absorbing state, it is applied. preferably the amount is ^{1g / m 2 ~30g / m 2} , more preferably ^{5g / m 2 ~20g / m 2} . If it is less than 1 g / m ² , it is difficult to obtain sufficient concealability in a normal state, and if it exceeds 30 g / m ² , it is difficult to obtain sufficient transparency upon liquid absorption.
The particle size of the silicic acid is not particularly limited, but 0.03 to 10.0 μm is preferably used.
The silicic acid is dispersed in a vehicle containing a binder resin as a binder, applied to a base material, and then the volatile matter is dried to form a porous layer.
Examples of the binder resin include urethane resin, nylon resin, vinyl acetate resin, acrylic ester resin, acrylic ester copolymer resin, acrylic polyol resin, vinyl chloride-vinyl acetate copolymer resin, maleic resin, polyester resin, styrene. Resin, styrene copolymer resin, polyethylene resin, polycarbonate resin, epoxy resin, styrene-butadiene copolymer resin, acrylonitrile-butadiene copolymer resin, methyl methacrylate-butadiene copolymer resin, butadiene resin, chloroprene resin, melamine resin, and the above Each resin emulsion, casein, starch, cellulose derivative, polyvinyl alcohol, urea resin, phenol resin and the like can be mentioned.
The mixing ratio of the silicic acid and these binder resins depends on the type and properties of silicic acid, but is preferably 0.5 to 2 parts by weight of binder resin solids, more preferably 1 part by weight of silicic acid. 0.8 to 1.5 parts by weight. When the binder resin solid content is less than 0.5 parts by weight with respect to 1 part by weight of silicic acid, it is difficult to obtain a practical film strength of the porous layer, and when it exceeds 2 parts by weight, The permeability of water into the porous layer is deteriorated.
Since the porous layer has a small mixing ratio of the binder resin to the colorant as compared with a conventionally known general coating film, it is difficult to obtain sufficient film strength. Therefore, in order to increase the scratch resistance, it is effective to use a nylon resin or a urethane resin among the binder resins.
Examples of the urethane resin include a polyester urethane resin, a polycarbonate urethane resin, and a polyether urethane resin, and two or more of them can be used in combination. In addition, a urethane emulsion resin in which the resin is emulsified and dispersed in water, or a colloid in which the resin is self-emulsified without requiring an emulsifier due to the ionic group of the urethane resin (urethane ionomer) itself and dissolved or dispersed in water. A dispersion type (ionomer type) urethane resin can also be used.
The urethane-based resin may be either an aqueous urethane-based resin or an oil-based urethane-based resin. In the present invention, an aqueous urethane-based resin, in particular, a urethane-based emulsion resin or a colloidally dispersed urethane-based resin is suitable. Used for.
The urethane resin can be used alone, but other binder resins can be used in combination depending on the type of support and the performance required for the coating. When a binder resin other than the urethane resin is used in combination, in order to obtain a practical film strength, it is preferable to contain 30% or more of the urethane resin in a solid content weight ratio in the binder resin of the porous layer.
In the binder resin, the crosslinkable resin can be further improved in film strength by adding an arbitrary crosslinking agent and crosslinking.
The binder resin has a large or small affinity with water. By combining these, the penetration time into the porous layer, the degree of penetration, and the slow speed of drying after the penetration can be adjusted. Furthermore, the said adjustment can be controlled by adding a dispersing agent suitably.

In the porous layer, conventionally known titanium dioxide-coated mica, iron oxide-titanium dioxide-coated mica, iron oxide-coated mica, guanine, sericite, basic lead carbonate, acidic lead arsenate, bismuth oxychloride, etc. The color change can be diversified by adding a metallic luster pigment or mixing general dyes and pigments, fluorescent dyes and fluorescent pigments.
In addition, conventionally known reversible thermochromic pigments that reversibly change color according to temperature change can be mixed, and the color can be changed depending on the environmental temperature or the water temperature to be adhered.
Furthermore, the color change can be further diversified by providing a colored layer in the upper layer, the lower layer, and / or the vicinity of the porous layer.
The porous layer and the colored layer are not limited to solid prints, but may be images of characters, symbols, designs, and the like.
The porous layer and the colored layer are conventionally known means, for example, printing means such as screen printing, offset printing, gravure printing, coater, tampo printing, transfer, brush coating, spray coating, electrostatic coating, electrodeposition coating. It can be formed by flow coating, roller coating, dip coating or the like.

The material of the foam used as the base material of the mat is not particularly limited, and polyurethane, polyethylene, ethylene vinyl acetate, polyimide, polyester, synthetic rubber latex, natural rubber latex, a mixture of synthetic rubber latex and natural rubber latex. Examples thereof include a foamed material made of a resin.
The foam has a hardness of 3 to 90, preferably 5 to 80.
If the hardness is less than 3, it is too soft and impairs the practicality of the mat, and it is difficult to satisfy the playability for forming a desired image from the porous layer. Furthermore, since it becomes easy to bend | fold, it is easy to produce a wrinkle in a porous layer, while impairing the appearance of goods, water enters easily along a wrinkle and it becomes difficult to form a stable image.
On the other hand, if the hardness exceeds 90, it is too hard to satisfy safety when handling individual mats or assembling and using them.
The hardness of the foam is measured according to JIS K 6301.

The tensile strength of the foam is 0.5 Kg / cm ² or more, preferably 0.6 Kg / cm ² or more.
If the tensile strength is less than 0.5 kg / cm ² , it can be easily torn off, so that playability is impaired and it becomes difficult to connect the mats due to tearing.
Furthermore, since the hardness and height of the mat are partially different due to tearing, the playability of forming a desired image from the porous layer is easily impaired.
In particular, when the mats are used while being assembled in a planar shape, if the hardness and the height are partially different, it is likely to cause a problem in image forming properties when an image is formed across the individual mats. . Specifically, when drawing with water on the porous layer, the mat is likely to be recessed when reaching a portion having a different hardness or height, making it difficult to form a uniform drawn line.
Furthermore, when playing on it, if it is stepped on with a foot, the balance is easily lost, the practicality of the mat is impaired, and the portion tends to be wrinkled.
The tensile strength of the foam is measured according to JIS K 6767.

The surface area of each mat is 50 to 10000 cm ² , preferably 100 to 2500 cm ² , and the thickness is 0.3 to 5 cm, preferably 0.5 to 3 cm from the viewpoint of image formation and practical use as a mat. Used.

The foam may be directly provided with a porous layer, but a fabric such as a woven fabric, a knitted fabric, a braid, a nonwoven fabric, or a plastic film may be interposed between the foam and the porous layer.
Furthermore, a colored layer is preferably interposed between the fabric or plastic film and the porous layer.
This is because it is possible to diversify the color tone visually recognized in the liquid absorption state of the porous layer, and it is easy to form a colored layer of a pattern or a pattern, so that the added value can be increased. .
The shape of the foam is not particularly limited as long as it is a shape that can be connected to each other, and plate-like foams such as squares, rectangles, triangles, hexagons, and the like are preferably used. More preferred.

  As a shape after the reversible color-changing play mat is assembled, a planar shape, a three-dimensional shape such as a house shape, a tunnel shape, and a desk shape can be exemplified.

The mat is provided with connecting portions that can be connected to each other.
In addition to the configuration in which the surface fastener and the magnetic material are separately provided, the connection portion includes a configuration in which an uneven connection portion is provided on each side of the mat, and the mutual unevenness is fitted.
In particular, the configuration in which the concavo-convex connection portion is provided can reduce the number of parts, and thus is low in cost and is suitable for the mat using the liquid of the present invention without the possibility of the connection portion peeling off.

The reversible color-changing play mat is preferably composed of two or more mats having different color tones that are visually recognized when the porous layer is in a liquid-absorbing state. Thus, when the porous layer is discolored, different color tones are visually recognized depending on the mat, so that variations in color change are abundant and playability can be improved.
Moreover, since the aspect after discoloration can be changed also by changing the connection place of a mat | matte, a completely different state can be visually recognized by the form after an assembly.

As a method of adhering water to the mat, a method in which a hand or a finger is wetted with water and brought into contact with the porous layer, a writing or applicator having a brush tip or a fiber pen body at the tip, or water on a sponge. A method of impregnating and contacting the porous layer, a method of bringing a container containing water close to or in contact with the porous layer, and attaching and deriving water from the container, a foam having open cells or closed cells on the marking surface Examples include a method of impregnating a fixed stamping tool with water and adhering it to the porous layer, and a method of adhering water to a stamping tool having a rough marking surface of plastic or rubber and bringing it into contact with the porous layer.
In addition, as a method for bringing a container containing water close to or in contact with the porous layer and drawing out water from the inside of the container and attaching it, the fibrous body that contains water in the container and leads out the water in the container A method of applying water with a brush, a method of containing water in a container and a method of spraying water by providing a spray device, and pressing the water in the container like a syringe to eject water Methods and the like.
Examples of the means for adhering water include a writing or applicator, a sponge, a stamp, a spray device, and a syringe. A reversible color-changing play mat set can be obtained in combination with a reversible color-change play mat.
In addition, as a preferable water adhering means, it is a writing instrument or applicator or a stamping instrument in which a plastic porous body or fiber processed body having continuous pores is applied as a pen tip member, and an arbitrary writing image or image can be easily formed. And practicality can be improved.
The plastic porous body or fiber processed body having continuous pores in the above may be any one that absorbs and discharges water in an appropriate amount, and has been conventionally used for continuous pores and fibers of general-purpose polyolefin-based, polyurethane-based, and other various plastics. Brush-like ones in which the fibers are focused, those obtained by resin processing or heat welding of fibers, felts, and non-woven fabrics. The shape and dimensions can be arbitrarily set according to the purpose.
Furthermore, a desired image can be easily formed by combining a stencil with the play equipment.

Examples are shown below, but the present invention is not limited to the examples. In addition, the part in an Example shows a weight part.
Example 1 (see FIGS. 1 to 3)
On the surface of foam 2 made of black polyurethane (thickness 0.5 cm, foaming ratio 30 times), 15 parts wet type silicic acid [trade name: NIPSEAL E-200, manufactured by Nippon Silica Kogyo Co., Ltd.], urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink & Chemicals, Inc., solid content 50%] 30 parts, water 50 parts, silicone-based antifoaming agent 0.5 parts, aqueous ink thickener 3 parts, ethylene glycol 1 part Then, using a white screen printing ink obtained by uniformly mixing and stirring 3 parts of a blocked isocyanate-based crosslinking agent, solid printing was performed on a 100-mesh screen plate, followed by drying and curing at 130 ° C. for 5 minutes to obtain a porous layer 3 After forming, a plurality of reversible color-changing play mats 1 were obtained by cutting each piece into a 10 cm square shape.
Each piece of the mat 1 is provided with an uneven connecting portion 4, and the surface area of the porous layer provided on the mat surface was 90 cm ² .
The hardness of the foamed material was 10 as a result of measurement by a spring type hardness tester (C type) according to JIS K 6301, and the tensile strength was measured according to JIS K 6767. It was 5 kg / m ² .
When the mat is in a dry state, a white porous layer is visually recognized on the entire surface, but when water is attached, the porous layer changes from a white opaque state to a colorless transparent state due to liquid absorption, and the color tone of the lower foam material changes. Although it is visually recognized and maintained in the liquid absorption state, it changes to the original white state by evaporating and drying the water.
The mats were placed on the floor and connected to each other to assemble a planar mat (see FIG. 2).
The mat is a white porous layer that can be safely played by an infant on its upper surface, and contains white water in a shaft cylinder and a white porous layer in a dry state using a pen (water adhering means) provided with a fiber processing pen body. When the character was drawn, the porous layer at that portion became transparent, and the black handwritten image 8 was visually recognized, thereby improving playability (see FIG. 3).
The written image was retained when the porous layer was in a liquid-absorbing state, and when dried, it returned to its original white color and became invisible, and this phenomenon could be repeated many times.
Further, the mat can be used in a three-dimensional shape.

Example 2
A reversible color-changing play mat set obtained in Example 1 was combined with a pen configured to accommodate water as a water adhering means in a shaft tube to obtain a reversible color-change play mat set.
The assembled playground equipment set had high playability as in Example 1, and was excellent in convenience.

Example 3 (see FIG. 4)
The fabric 5 is solid-printed on a white non-woven fabric (40% tetron, 60% cotton) with a basis weight of 70 g / m ² using a pink screen printing ink on a 180 mesh screen plate at 100 ° C. The colored layer 6 was provided by drying and curing for 3 minutes.
Next, 15 parts of wet process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Kogyo Co., Ltd.], 0.5 parts of blue pigment, urethane emulsion [trade name: Hydran HW- 930, manufactured by Dainippon Ink & Chemicals, Inc., solid content 50%] 30 parts, water 50 parts, silicone-based antifoaming agent 0.5 part, water-based ink thickener 3 parts, ethylene glycol 1 part, blocked isocyanate Using a blue screen printing ink obtained by uniformly mixing and stirring 3 parts of a cross-linking agent, solid printing is performed on a 100 mesh screen plate, followed by drying and curing at 130 ° C. for 5 minutes to form a porous layer 3. Thus, a reversible discolorable fabric was obtained.
In the reversible color-changing fabric, in the dry state, the colored layer is in a concealed state, and a light blue porous layer is visually recognized on the entire surface. However, when water is attached, the porous layer is absorbed from the light blue opaque state to the blue color. It changes to a transparent state, and purple color due to color mixture with the lower colored layer is visually recognized, and the state is maintained in the liquid absorption state, but reversibly returns to the original light blue state by evaporating and drying the water. Change.
Further, in the same manner, an orange colored layer is provided on the entire surface of a white non-woven fabric (40% Tetron, 60% cotton) with a basis weight of 70 g / m ² , and water is removed from the light yellow opaque state on the entire surface of the colored layer. A porous layer that changes to a yellow transparent state due to adhesion was formed, and a reversible color-changing fabric that reversibly changes from pale yellow to orange by water absorption was obtained.
Further, in the same manner, a pink colored layer is provided on the entire surface of a white non-woven fabric (40% tetron, 60% cotton) having a basis weight of 70 g / m ² , and a light green opaque state is formed on the entire surface of the colored layer. A porous layer that changed to a green transparent state by the adhesion of water was formed, and a reversible color-changing fabric that reversibly changed from light green to brown by water absorption was obtained.
Further, in the same manner, a red colored layer is provided on the entire surface of a white nonwoven fabric (40% tetron, 60% cotton) having a basis weight of 70 g / m ² , and the light pink opaque state is applied to the entire surface of the colored layer. A porous layer that changed to a pink transparent state upon formation of water was formed, and a reversible discolorable fabric that reversibly changed from light pink to red by water absorption was obtained.
Further, in the same manner, a pink colored layer is provided on the entire surface of a white nonwoven fabric (40% tetron, 60% cotton) with a basis weight of 70 g / m ² , and a light purple opaque state is applied to the entire surface of the colored layer. A porous layer that changes to a violet transparent state by adhesion of water was formed, and a reversible color-changing fabric that reversibly changes from light purple to reddish purple by water absorption was obtained.
Each of the reversible color-changing fabrics was bonded to a foam material 2 (thickness 1 cm, expansion rate 10 times) made of ethylene vinyl acetate, and then cut into a square shape with a piece of 30 cm, and a plurality of reversible color-changeable play mats 1. Got.
Each piece of the mat was provided with an uneven connecting portion, and the surface area of the porous layer provided on the mat surface was 840 cm ² .
The hardness of the foamed material was 25 as a result of measurement by a spring type hardness tester (C type) according to JIS K 6301, and the tensile strength was 10 Kg / as a result of measurement according to JIS K 6767. cm ² .
The mats were placed on the floor and connected to each other to assemble a planar mat.
The connected mats are light blue, light yellow, light green, light pink, and light purple in the dry state, so they are visually colorful, and infants can play safely on the top surface. In addition, using a pen that contains water in the shaft cylinder and is provided with a fiber processing pen body, letters are placed on the light blue, light yellow, light green, light pink, and light purple porous layers in a dry state. When drawn, the porous layer at that portion became transparent, and purple, orange, brown, red, and magenta writing images were visually recognized, and playability was improved.
The written image was retained when the porous layer was in a liquid-absorbing state, and when dried, it returned to its original color and became invisible, and this phenomenon could be repeated many times.
Further, the mat can be used in a three-dimensional shape.

Example 4
A reversible color-changing play mat set obtained in Example 3 was combined with a pen configured to be able to store water in a shaft tube as water adhering means to obtain a reversible color-change play mat set.
The assembled playground equipment set had high playability as in Example 3, and was excellent in convenience.

Example 5 (see FIG. 5)
15 parts wet-type silicic acid [trade name: NIPSEAL E-200, manufactured by Nippon Silica Kogyo Co., Ltd.] on the entire surface of a white non-woven fabric (rayon 60%, ester 40%) having a basis weight of 65 g / m ² as fabric 5 0.5 parts of pigment, urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink & Chemicals, Inc., solid content 50%] 30 parts, water 50 parts, silicone-based antifoaming agent 0.5 part, aqueous system Using a blue screen printing ink that is obtained by uniformly mixing and stirring 3 parts of an ink thickener, 1 part of ethylene glycol, and 3 parts of a blocked isocyanate-based crosslinking agent, solid printing is performed on a 100 mesh screen plate. A porous layer 3 was formed by drying and curing at 5 ° C. for 5 minutes to obtain a reversibly discoloring fabric.
When the reversible discolorable fabric is in a dry state, a light blue porous layer is visible on the entire surface. However, when water is attached, the porous layer changes from a light blue opaque state to a deep blue transparent state due to liquid absorption. Blue is visually recognized and maintained in the liquid absorption state, but reversibly changes to the original light blue state by evaporating and drying the water.
Further, in the same manner, a porous layer that changes from a light yellow opaque state to a deep yellow transparent state due to adhesion of water on the entire surface of a white nonwoven fabric (rayon 60%, ester 40%) having a basis weight of 65 g / m ^2. This formed a reversible color-changing fabric.
Further, in the same manner, a porous layer that changes from a light green opaque state to a dark green transparent state due to adhesion of water on the entire surface of a white nonwoven fabric (rayon 60%, ester 40%) having a basis weight of 65 g / m ^2. This formed a reversible color-changing fabric.
Further, in the same manner, a porous layer that changes from a light pink opaque state to a deep pink transparent state due to water adhesion on a white nonwoven fabric (rayon 60%, ester 40%) having a basis weight of 65 g / m ² is prepared. This formed a reversible color-changing fabric.
Further, in the same manner, a porous layer that changes from a light purple opaque state to a deep purple transparent state due to adhesion of water on the entire surface of a white nonwoven fabric (rayon 60%, ester 40%) having a basis weight of 65 g / m ^2. This formed a reversible color-changing fabric.
Each of the reversible discolorable fabrics is attached to a foam material 2 (thickness 0.5 cm, expansion rate 4 times) made of ethylene vinyl acetate, and then cut into a 20 cm square shape for a plurality of reversible color-changing games. A mat 1 was obtained.
Each piece of the mat was provided with an uneven connecting portion, and the surface area of the porous layer provided on the mat surface was 360 cm ² .
The hardness of the foamed material is 50 as measured by a spring type hardness tester (C type) according to JIS K 6301, and the tensile strength is 20.0 kg as a result of measurement according to JIS K 6767. / Cm ² .
The mats were placed on the floor and connected to each other to assemble a planar mat.
The connected mats are light blue, light yellow, light green, light pink, and light purple in the dry state, so they are visually colorful, and infants can play safely on the top surface. In addition, using a pen that contains water in the shaft cylinder and is provided with a fiber processing pen body, letters are placed on the light blue, light yellow, light green, light pink, and light purple porous layers in a dry state. When drawn, the porous layer of the part becomes transparent, and a written image of dark blue, dark yellow, dark green, dark pink, dark purple is visually recognized, and the porous layer is made using a stamp impregnated with water on the stamp surface. When imprinted on the surface, the porous layer at that portion became transparent, and dark blue, dark yellow, dark green, dark pink, and dark purple printed images were visually recognized, and the playability was improved.
The written image and the printed image were retained when the porous layer was in a liquid-absorbing state, and when dried, the original color returned to the invisible state, and this phenomenon could be repeated many times.
Further, the mat can be used in a three-dimensional shape.

Example 6
A reversible color-changing play mat set obtained in Example 5 was combined with a pen and a stamp configured to be able to accommodate water in a shaft cylinder as water adhering means to obtain a reversible color-change play mat set.
The assembled playground equipment set had high playability as in Example 5, and was excellent in convenience.

Example 7
As a fabric, on the entire surface of a pink non-woven fabric (cotton 100%) with a weight per unit area of 80 g / m ² , 15 parts of wet process silicic acid [trade name: NIPSEAL E-200, manufactured by Nippon Silica Kogyo Co., Ltd.], urethane emulsion [trade name] : Hydran HW-930, manufactured by Dainippon Ink & Chemicals, Inc., solid content 50%] 30 parts, water 50 parts, silicone-based antifoaming agent 0.5 parts, aqueous ink thickener 3 parts, ethylene glycol 1 1 part, 3 parts of a block isocyanate-based cross-linking agent are uniformly mixed and stirred using a white screen printing ink, solid-printed on a 100-mesh screen plate, dried and cured at 130 ° C. for 5 minutes, and then a porous layer And a reversible color-changing fabric that changes from white to pink by absorbing water was obtained.
In the reversible color-changing fabric, a white porous layer is visually recognized in the dry state, but when water is attached, the porous layer changes from an opaque state to a transparent state by liquid absorption, and the pink color of the fabric is visually recognized. In the liquid absorption state, this state is maintained, but when the water is evaporated and dried, the state is reversibly changed to the original white state.
Further, in the same manner, a reversible color-changing fabric is formed by forming a porous layer that changes from a white opaque state to a transparent state due to water adhesion on the entire surface of a yellow nonwoven fabric (cotton 100%) having a basis weight of 80 g / m ^2. Got.
Further, in the same manner, a porous layer that changes from a white opaque state to a transparent state due to adhesion of water is formed on the entire surface of a green nonwoven fabric (cotton 100%) having a weight per unit area of 80 g / m ² , thereby reversibly discoloring the fabric. Got.
Further, in the same manner, a reversible color-changing fabric is formed by forming a porous layer that changes from a white opaque state to a transparent state by adhesion of water on the entire surface of a blue nonwoven fabric (cotton 100%) having a basis weight of 80 g / m ^2. Got.
Further, in the same manner, a porous layer that changes from a white opaque state to a transparent state due to adhesion of water is formed on the entire surface of a red nonwoven fabric (cotton 100%) having a basis weight of 80 g / m ² , and a reversibly discoloring fabric. Got.
A plurality of reversible color-changing play mats obtained by sticking each of the reversible color-changing fabrics to a foam material made of ethylene vinyl acetate (thickness 1.5 cm, expansion rate 20 times) and then cutting each piece into a square shape of 30 cm. Got.
Each piece of the mat was provided with an uneven connecting portion, and the surface area of the porous layer provided on the mat surface was 800 cm ² .
The hardness of the foamed material was 15 as measured by a spring type hardness tester (C type) in accordance with JIS K 6301. The tensile strength was measured in accordance with JIS K 6767. It was 0 Kg / cm ² .
The mats were placed on the floor and connected to each other to assemble a planar mat.
The connected mats are white in the dry state.
Using a pen that contains water in the shaft cylinder and is equipped with a fiber processing pen body, when characters are drawn on the porous layer, the porous layer in that part becomes transparent and becomes pink, yellow, green, blue The red writing image was visually recognized and the playability was improved.
The written image was retained when the porous layer was in a liquid-absorbing state, and when dried, it returned to its original color and became invisible, and this phenomenon could be repeated many times.
Further, the mat can be used in a three-dimensional shape.

Example 8
A reversible color-changing play mat set obtained in Example 7 was combined with a pen configured to accommodate water as a water adhering means in a shaft tube to obtain a reversible color-change play mat set.
The assembled playground equipment set had high playability as in Example 7, and was excellent in convenience.

Example 9
A white T / C broad fabric (65% ester, 35% cotton) with a basis weight of 140 g / m ^{2 as} a fabric, 5 parts blue pigment, 50 parts acrylic ester emulsion, 3 parts water-based ink thickener, leveling Using a blue screen printing ink with 0.5 parts of the agent and 5 parts of the epoxy cross-linking agent mixed and stirred uniformly, solid printing is performed on a 180 mesh screen plate, followed by drying and curing at 100 ° C. for 3 minutes to color. A layer was provided.
Next, 15 parts of wet process silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.], urethane emulsion [trade name: Hydran HW-930, manufactured by Dainippon Ink & Chemicals, Inc.] on the colored layer. , 50% solid content] 30 parts, 50 parts of water, 0.5 part of a silicone-based antifoaming agent, 3 parts of a thickener for water-based ink, 1 part of ethylene glycol, 3 parts of a blocked isocyanate-based crosslinking agent are uniformly mixed and stirred. Using a white screen printing ink, solid printing is performed on a 100-mesh screen plate, followed by drying and curing at 130 ° C. for 5 minutes to form a porous layer, which changes from white to blue by absorbing water. A reversible discolorable fabric was obtained.
In the reversible color-changing fabric, the colored layer is in a concealed state in a dry state, and a white porous layer is visually recognized on the entire surface. However, when water is attached, the porous layer is changed from a white opaque state to a colorless and transparent state by liquid absorption. The color tone of the lower colored layer is visually recognized, and the state is maintained in the liquid absorption state, but when the water is evaporated and dried, it changes to the original white state.
After pasting the reversible discolorable fabric on a foam material made of ethylene vinyl acetate (thickness 1.5 cm, expansion rate 20 times), a piece is cut into a square shape of 30 cm to form a plurality of reversible discolorable play mats. Obtained.
Each piece of the mat was provided with an uneven connecting portion, and the surface area of the porous layer provided on the mat surface was 800 cm ² .
The hardness of the foamed material was 15 as measured by a spring type hardness tester (C type) in accordance with JIS K 6301. The tensile strength was measured in accordance with JIS K 6767. It was 0 Kg / cm ² .
The mats were placed on the floor and connected to each other to assemble a planar mat.
The mat allows children to play safely on its upper surface, and when drawing a character on a white porous layer in a dry state using a pen containing water in a shaft cylinder and provided with a fiber processing pen body The porous layer of the part became transparent, and a blue handwritten image was visually recognized, thereby improving playability. The written image was retained when the porous layer was in a liquid-absorbing state, and when dried, it returned to its original white color and became invisible, and this phenomenon could be repeated many times.
Further, the mat can be used in a three-dimensional shape.

Example 8
A reversible color-changing play mat set obtained in Example 7 was combined with a pen configured to accommodate water as a water adhering means in a shaft tube to obtain a reversible color-change play mat set.
The assembled playground equipment set had high playability as in Example 7, and was excellent in convenience.

Example 9 (see FIG. 5)
On the entire surface of a transparent polyethylene terephthalate plastic film 7 having a thickness of 16 μm, 15 parts of wet-method silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Kogyo Co., Ltd.], urethane emulsion [trade name: Hydran AP-10, Dainippon Ink & Chemicals, Inc., solid content 30%] 50 parts, water 50 parts, silicone-based antifoaming agent 0.5 part, water-based ink thickener 3 parts, ethylene glycol 1 part, blocked isocyanate-based crosslinking Using a white screen printing ink that is uniformly mixed and stirred with 3 parts of the agent, solid printing is performed on a 100-mesh screen plate, followed by drying and curing at 130 ° C. for 5 minutes to form a porous layer 3 and reversible. A discoloring film was obtained.
In the reversible color-changing film, a white porous layer is visually recognized in the dry state, but when water is attached, the porous layer changes from a white opaque state to a colorless and transparent state by liquid absorption. While maintaining this state, the water changes to the original white state by evaporating and drying. After sticking the reversible color-changing film to a foam 2 made of green polyethylene (thickness 2 cm, foaming rate 15 times), one piece is cut into a square shape of 40 cm to obtain a plurality of reversible color-changing play mats 1. It was.
Each piece of the mat was provided with an uneven connecting portion, and the surface area of the porous layer provided on the mat surface was 1500 cm ² .
The hardness of the foamed material was 15 as a result of measurement by a spring type hardness tester (C type) according to JIS K 6301, and the tensile strength was measured according to JIS K 6767. It was 0 Kg / cm ² .
The mats were placed on the floor and connected to each other to assemble a planar mat.
The mat is safe for infants to play on its upper surface, and when the stamp is imprinted on the porous layer using a stamp impregnated with water, the porous layer of that part becomes transparent and a green image is visible And improved playability.
The imprint was retained when the porous layer was in a liquid-absorbing state, and when dried, it returned to its original white color and became invisible, and this phenomenon could be repeated many times.
Further, the mat can be used in a three-dimensional shape.

Example 10
A reversible color-changing play mat set obtained in Example 9 was combined with a stamp to obtain a reversible color-change play mat set.
The assembled playground equipment set had high playability as in Example 9, and was excellent in convenience.

Example 11
On the synthetic paper side of the label provided with an adhesive layer and release paper on one side of white synthetic paper with a thickness of 80 μm, solid printing was performed with a 120-mesh screen plate using yellow screen printing ink. A colored layer was provided by drying and curing for minutes.
Next, 15 parts of wet process silicic acid [trade name: Nipseal E-220, manufactured by Nippon Silica Kogyo Co., Ltd.], urethane emulsion [trade name: Hydran AP-10, Dainippon Ink & Chemicals, Inc.] ), Solid content 30%] 45 parts, 40 parts water, 0.5 parts silicone defoamer, 3 parts thickener for water-based ink, 1 part ethylene glycol, 3 parts block isocyanate-based crosslinking agent Using a white screen printing ink obtained by mixing and stirring, the entire surface was solid-printed on a 100-mesh screen plate, dried and cured at 60 ° C. for 30 minutes to form a porous layer, and then circular with a diameter of 20 cm by Thomson. To obtain a reversible color-changing label.
In the reversible color-changing label, the colored layer is in a concealed state in a dry state, and a white porous layer is visually recognized on the entire surface, but when water is attached, the porous layer is absorbed from the white opaque state into a colorless and transparent state. The color tone of the lower colored layer is visually recognized, and the state is maintained in the liquid absorption state, but when the water is evaporated and dried, it changes to the original white state.
The label was attached to a foamed material made of ethylene vinyl acetate (thickness 0.8 cm, foaming ratio 10 times), and then cut into a square shape with a piece of 25 cm to obtain a plurality of reversible color-changing play mats.
Each piece of the mat is provided with an uneven connecting portion.
The hardness of the foamed material was 25 as measured by a spring hardness tester (C type) according to JIS K 6301, and the tensile strength was measured according to JIS K 6767. It was 0 Kg / cm ² .
The mats were placed on the floor and connected to each other to assemble a planar mat.
The mat can be used for infants to play safely on its upper surface, and when drawing a character on a white porous layer in a dry state using a pen that contains water in a shaft tube and a fiber processing pen body. The porous layer of the part became transparent, and a blue handwritten image was visually recognized, thereby improving playability.
The written image was retained when the porous layer was in a liquid-absorbing state, and when dried, it returned to its original white color and became invisible, and this phenomenon could be repeated many times.
Further, the mat can be used in a three-dimensional shape.

Example 12
A reversible color-changing play mat set obtained in Example 11 was combined with a pen that was configured to be able to accommodate water in a shaft tube as a water adhering means to obtain a reversible color-change play mat set.
The assembled playground equipment set had high playability as in Example 11 and was excellent in convenience.

It is a longitudinal cross-sectional explanatory drawing of the reversible color-changing play mat of this invention. It is a front view which shows the assembly state of the reversible color-changing play mat of FIG. It is a front view which shows the state which formed the writing image in the mat | matte for reversible color-change play of FIG. It is a longitudinal cross-sectional explanatory drawing of another reversible color-change play mat of this invention. It is a longitudinal cross-sectional explanatory drawing of another reversible color-change play mat of this invention. It is a longitudinal cross-sectional explanatory drawing of another reversible color-change play mat of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reversible color-changing play mat 2 Foam material 3 Porous layer 4 Connection part 5 Fabric 6 Colored layer 7 Plastic film 8 Written image

Claims (12)

  A porous layer having different transparency in a liquid-absorbing state and a non-liquid-absorbing state, in which a low refractive index pigment is fixed in a dispersed state on a binder resin on the surface of a play mat made of a plurality of mutually connectable foams. A reversible color-changing play mat provided.   The reversible color-changing play mat according to claim 1, wherein the foam has a hardness of 3 to 90. The reversible color-changing play mat according to claim 1 or 2, wherein the foam has a tensile strength of 0.5 kg / m ² or more. Reversibly variable color play mat according to any one of claims 1 to 3 surface area of the porous layer provided on the mat surface is 50~10000cm ^2.   The reversible color-changing play mat according to any one of claims 1 to 4, wherein a cloth or a plastic film is interposed between the plate-like foam and the porous layer.   The reversible color-changing play mat according to claim 5, wherein the fabric is selected from a woven fabric, a knitted fabric, a braided fabric, and a non-woven fabric.   The reversible color-changing play mat according to claim 5 or 6, wherein a colored layer is interposed between the fabric or plastic film and the porous layer.   The reversible color-changing play mat according to any one of claims 1 to 7, wherein the play mat is a square.   The reversible color-changing game mat according to any one of claims 1 to 8, wherein an uneven-shaped connecting portion is provided on each side of the game mat.   The reversible color-changing play mat according to any one of claims 1 to 9, wherein the porous layer is composed of two or more mats having different color tones visually recognized in a liquid absorption state.   A reversible color-changing play mat set comprising the reversible color-changing play mat according to any one of claims 1 to 10 and water adhering means.   12. The reversible color-changing play mat according to claim 11, wherein the water adhering means is selected from any of a writing instrument, an applicator, or a stamp tool in which a plastic porous body or a fiber processed body having continuous pores is applied as a nib member. set.

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