JP2008149593A - Bag for water discoloration drawing and bag set for water discoloration drawing using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag for water discoloration drawing which enables repeated drawing of an arbitrary image with water or the like and also excels in portability, and a bag set for water discoloration drawing using the same. <P>SOLUTION: The bag 1 is so constituted that a pair of side wall parts 2 can be opened in a spread state and closed. A porous layer 6 which is formed by making a low-refractive-index pigment fixed in a dispersion state to a binder resin and shows different transparency between a liquid-absorbing state and a non-liquid-absorbing state is provided on at least one of the side wall parts 2. A waterproof layer 23 is provided on the underside of the porous layer 6. The bag set for water discoloration drawing consists of the bag 1 for water discoloration drawing and a water adhering means 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water discoloration drawing bag and a water discoloration drawing bag set using the same. Furthermore, the present invention relates to a water discoloration drawing bag having excellent portability and capable of repeated writing, and a water discoloration drawing bag set using the same.

Conventionally, there has been disclosed a fabric sheet having a porous surface on which repetitive writing is possible due to adhesion of liquid (see, for example, Patent Document 1).
The fabric sheet can draw an arbitrary image on the porous surface with water or the like, and can repeatedly draw and write after the handwriting is dried, and is particularly widely used as a toy application.
However, since the fabric sheet is used by being spread out in a certain place, it does not have portability and portability, and it is particularly difficult for an infant to carry around when going out.
JP 2004-175101 A

  The present invention provides a water discoloration drawing bag that can repeat an arbitrary image with water or the like and has excellent portability, and a water discoloration drawing bag set using the same.

The present invention is a bag in which a pair of side wall portions can be opened and closed in a spread state, and a low refractive index pigment is fixed to a binder resin in a dispersed state on at least one of the side wall portions, and a liquid absorbing state and a non-liquid absorbing state A water discoloration drawing bag provided with a porous layer having different transparency depending on the state is a requirement.
Furthermore, the pair of side wall portions is a bag that can be opened and closed in a spread state, and a low refractive index pigment is fixed to a binder resin in a dispersed state on each inner surface of the side wall portion in a liquid absorption state and a non-liquid absorption state. A water discoloration drawing bag in which a porous layer having different transparency is provided and each porous layer is colored in a different color is a requirement.
Furthermore, the pair of side wall portions is a bag that can be opened and closed in a spread state, and a liquid-absorbing state and a non-liquid-absorbing state in which a low-refractive-index pigment is fixed in a dispersed state to a binder resin on substantially the entire surface when the state is opened. A water discoloration drawing bag provided with a porous layer having different transparency depending on the state is a requirement.
Further, a waterproof layer is provided on the lower surface of the porous layer, the bag has a handle, the bag has an opening / closing means, and the opening / closing means is a fastener that can be operated from both the front and back sides. As a requirement.
Furthermore, a water discoloration drawing bag set comprising any one of the water discoloration drawing bags and the water adhering means is a requirement, and the water discoloration drawing bag is provided with a holding unit for holding the water adhering means. The water adhering means is at least one selected from a writing instrument, an applicator, or a stamp tool, in which a plastic porous body or fiber processed body having continuous pores is applied as a pen tip member, or a template It is a requirement to have

  INDUSTRIAL APPLICABILITY The present invention is capable of repeatedly drawing an arbitrary image with water or the like, and can be easily carried by an infant. Therefore, the water discoloration drawing bag is excellent in convenience and can be used on the go. And a water discoloration drawing bag set using the same.

  The bag of the present invention has a structure in which a pair of side wall portions are connected directly or via a gusset portion (bottom portion), the side wall portions can be opened and closed in a spread state, and at least one of the side wall portions is porous. A layer provided, or a porous layer colored in a different color on each inner surface of the side wall portion, or a porous layer provided on substantially the entire surface in a spread state. is there.

  The bag is preferably provided with a handle so that an infant or the like can reliably carry it. Examples of the handle part include a pair of handles provided on the side wall part and one formed on the upper end (upper gusset part) of one side wall part, and the bag is set to a length that does not contact the ground when carrying the handle part. Things that can be adjusted to a length that can be hung from the shoulder can be used.

In addition, the bag can be opened by opening the three sides of the upper side and the both sides. However, the bag is prevented from being opened when being carried, and the opening / closing means is used for effectively expressing the function as a bag. Is preferably provided.
The opening / closing means includes a strip extending from one side wall portion and a locking portion for inserting the strip, or a button or a magnet provided on the strip to correspond to the other side wall portion. For those that have locking parts (buttons, holes, magnetic bodies, etc.), those that have buttons and holes (or male buttons and female buttons or magnets) on each side wall, and flaps that seal the upper gusset It is possible to apply a button or a magnet provided with a locking portion that forms a pair on the other side wall, or a zipper (fastener) that seals three sides. In particular, by using a zipper that can be operated from both the front and back sides as the zipper, it can be held in a form (reversible) with the inner surface of the side wall part being the outer surface, so the zipper is closed with the porous layer serving as the outer surface during writing. It will be possible to do.

  The material (base material) of the bag can be used regardless of resin, cloth, leather, synthetic leather, etc., but since it is flexible and has a good touch, a soft resin such as cloth or polyurethane resin is used on the surface, It is preferable to adopt a configuration in which a foam or the like is accommodated inside.

  The side wall (inner surface and outer surface) and gusset (the wide portion formed on the upper and bottom surfaces of the bag) of the bag are provided with a holding portion that accommodates and holds water adhering means such as an applicator and accessories such as a template. Can do. Thereby, the storage property of the accessory is improved, and it is possible to prevent the loss or the like.

  In addition, by forming the gusset portion, the bag capacity is increased, and the porous layer can be held without contacting the other side wall portion or the porous layer. And the deterioration of the porous layer can be suppressed.

The porous layer formed on the side wall is a layer in which a low refractive index pigment is fixed in a dispersed state together with a binder resin, and forms a writing surface.
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 during 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, a polyether urethane resin, and the like, and two or more kinds may 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 the need for an emulsifier by an ionic group of the ionic 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, but 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 and surfactant 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, and may be images (colored 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.

  In particular, when forming a colored image on a porous layer, it is an element as a learning material that can be traced and timed by forming hiragana and alphabet letters with letters, or forming the appearance of a clock. Can be given in addition to the decorating effect, making it more useful.

Further, a waterproof layer made of a non-immersible film or an adhesive can be interposed under the porous layer (for example, in the side wall or between the side wall and the porous layer). Thereby, it can suppress that a liquid penetrate | invades into the lower layer of a porous layer. The waterproof layer is not limited to a transparent layer, and a colored layer can also be used.
Furthermore, since the waterproof layer is formed of a hard material, it can function as an underlay for the writing surface (porous layer), so even if the bag is made of a soft material (base material) A writing surface with hardness can be obtained, and a solid handwriting can be formed.

As a method of adhering water to the porous layer of the bag, a method of wetting hands and fingers with water to contact the porous layer, a writing or applicator having a brush tip or a fiber pen body at the tip, or A method of impregnating water into a sponge and bringing it into contact with the porous layer, a method of bringing a container containing water close to or in contact with the porous layer, and attaching water by deriving it from the inside of the container, and open cells or closed cells on the marking surface A method for impregnating water with a stamping tool having a foam adhered thereto and adhering it to a porous layer, a method for adhering water to a stamping tool with a rough marking surface of plastic or rubber, and bringing it into contact with the porous layer It is done.
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, a syringe, and the like. A water discoloration drawing bag set is obtained in combination with a water discoloration drawing bag.
In addition, as a preferable water adhesion means, it is a writing instrument or applicator or a stamping instrument in which a plastic porous body or a 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. 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.
Further, the water adhering means such as the writing instrument, the applicator, and the stamp can be accommodated in a holding portion formed in the bag, thereby improving the portability and preventing loss.

  Furthermore, a desired image can be easily formed by combining a template with the bag set.

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 and 2)
After printing various designs 21 (colored layers) on the surface of a red T / C broad fabric (65% polyester, 35% cotton) 22 having a basis weight of 110 g / m ² , About half of the surface, wet method silicic acid [trade name: Nipseal E-200, manufactured by Nippon Silica Industry Co., Ltd.] 15 parts, blue pigment 0.5 part, urethane emulsion [trade name: Hydran HW-930, Dainippon Ink & Chemicals, Inc. Co., Ltd., solid content 50%] 30 parts, 50 parts of water, 0.5 parts of silicone-based antifoaming agent, 3 parts of thickener for water-based ink, 1 part of ethylene glycol, 3 parts of blocked isocyanate-based crosslinking agent Using a blue screen printing ink mixed and agitated, solid printing was performed on a 100 mesh screen plate (blue porous layer 6a portion), and the design 21 was not printed. On one side, wet process silicic acid [trade name: NIPSEAL E-200, manufactured by Nippon Silica Industry Co., Ltd.] 15 parts, pink pigment 0.5 part, urethane emulsion [trade name: Hydran HW-930, Dainippon Ink & Chemicals, Inc. Co., Ltd., solid content 50%] 30 parts, 50 parts of water, 0.5 parts of silicone-based antifoaming agent, 3 parts of thickener for water-based ink, 1 part of ethylene glycol, 3 parts of blocked isocyanate-based crosslinking agent After solid printing on a 100-mesh screen plate using a pink screen printing ink mixed and stirred in (Pink porous layer 6b portion), it is dried and cured at 130 ° C. for 5 minutes to form a fabric (fabric). A porous layer 6 was formed on layer 22).

  Further, the foam body 24 is disposed inside the side wall 2 on the side wall 2 of the bag body formed by sewing the polyurethane base 25 and sewing the zipper 3, the gusset 4, the handle 5 and the like. After disposing a polypropylene resin sheet as the waterproof layer 23, the water discoloration drawing bag 1 is formed by sewing the fabric (fabric layer 22) to the base 25. Various colored symbols are printed on the outer surface of the side wall 2.

  The bag 1 is set with a pen 71 (having water in a shaft tube and provided with a fiber processing pen body), and the pen 71 is provided in a gusset portion 4 serving as a bottom wall. It can be accommodated in the part 41 and is connected to the pen accommodating part 41 by a mooring part 42 for preventing loss or dropping.

The zipper 3 is provided with two reversible open / close sliders that can be operated from both the front and back sides, and the three sides of the base 25 (peripheral walls excluding the bottom wall portion) so that the side wall portions 2 can be opened in a spread state. Open / close means sewn to the portion).
The gusset portion 4 is a portion that becomes the bottom wall of the bag 1 and is configured to secure a storage space in the bag and to prevent the porous layers 6a and 6b from contacting each other.
The said handle part 5 is provided above each side wall part 2, and it is comprised so that the infant can suspend the bag 1 and can carry it easily.

In the closed state, the water discoloration drawing bag 1 is easy to carry, and in the closed state in which the three sides of the upper and both sides are opened or the front and back are reversed and closed, Writing to the porous layer 6 becomes possible.
When an image was drawn on the blue porous layer 6a (blue in a dry state) with the pen 71, the porous layer 6a in that portion became transparent, and a purple writing image 8 was visually recognized. Moreover, when an image was drawn with the pen 71 on the pink porous layer 6b (pink when dry), the porous layer 6b in that portion became transparent, and the red writing image 8 was visually recognized. The written image 8 was retained when the porous layers 6a and 6b were in a liquid-absorbing state, and when dried, the original blue and pink color returned to the invisible state, and this phenomenon could be repeated many times.
Further, when writing, the waterproof layer 23 served as an underlay, and a solid handwriting 8 could be formed even in a bag made of a soft material.

Example 2 (see FIG. 3)
After printing various designs 21 (colored layers) on the surface of a yellow nylon taffeta fabric 22 having a basis weight of 80 g / m ² , white solid printing is performed on portions where the designs 21 are not printed, Wet process silicic acid [trade name: Nipsil E-200, manufactured by Nippon Silica Industry Co., Ltd.] 15 parts, blue pigment 0.5 part, urethane emulsion [trade name: Hydran HW-930, Dainippon Ink & Chemicals, Inc. ), 50% solids] 30 parts, 50 parts water, 0.5 parts silicone antifoam, 3 parts thickener for water-based ink, 1 part ethylene glycol, 3 parts blocked isocyanate crosslinking agent Using a blue screen printing ink obtained by stirring, solid printing was performed on a 100-mesh screen plate, followed by drying and curing at 130 ° C. for 5 minutes to form the porous layer 6 on the fabric (fabric layer 22).

  Further, the foam body 24 is disposed inside the side wall 2 on the side wall 2 of the bag body formed by sewing the polyurethane base 25 and sewing the zipper 3, the gusset 4, the handle 5 and the like. After the polypropylene resin sheet is disposed as the waterproof layer 23, the fabric layer 22 is sewn on the base 25 on one side wall 2b, and various designs 21 (colored) are on the other side wall 2a. The yellow nylon taffeta fabric 22 provided with a layer) and a storage part (pen storage part 41, stamp storage part 43, template storage part 44) is sewn to the base 25 to form the water discoloration drawing bag 1.

  The bag 1 is provided with a pen 71 (containing water in the shaft cylinder and provided with a fiber processing pen body), and a stamp 72 (felt material for storing water in the shaft cylinder and impregnating the surface with liquid. A plurality of templates 9 are set, and the pen 71 has a structure that can be accommodated and retained in the pen accommodating portion 41, the stamp 72 in the stamp accommodating portion 43, and the template 9 in the template accommodating portion 44. It is structured to be hard to lose when carrying.

The zipper 3 is provided with two reversible open / close sliders that can be operated from both the front and back sides, and the three sides of the base 25 (peripheral walls excluding the bottom wall portion) so that the side wall portions 2 can be opened in a spread state. Open / close means sewn to the portion).
The gusset portion 4 is a portion that becomes the bottom wall of the bag 1 and secures an accommodation space in the bag, and even when the pen 71 or the like is accommodated, the holding portions 41, 43, 44 and the porous layer 6 are It is the composition which does not touch.
The said handle part 5 is provided above each side wall part 2, and it is comprised so that the infant can suspend the bag 1 and can carry it easily.

In the closed state, the water discoloration drawing bag 1 is easy to carry, and in the closed state in which the three sides of the upper and both sides are opened or the front and back are reversed and closed, Writing to the porous layer 6 becomes possible.
When an image was drawn on the blue porous layer 6 (blue in a dry state) with a pen 71 or a stamp 72, the porous layer 6 in that portion became transparent and a light blue image 8 was visually recognized. The image 8 was retained when the porous layer 6 was in a liquid-absorbing state, and when dried, it returned to its original blue color and became invisible, and this phenomenon could be repeated many times.
Further, when writing, the waterproof layer 23 served as an underlay, and a solid handwriting 8 could be formed even in a bag made of a soft material.

Example 3 (see FIG. 4)
After printing various designs 21 (colored layer) on the surface of a red T / C broad fabric (65% polyester, 35% cotton) 22 having a basis weight of 110 g / m ² , the portions where the design 21 is not printed are printed. Wet process silicic acid [trade name: NIPSEAL E-200, manufactured by Nippon Silica Industry Co., Ltd.] 15 parts, pink pigment 0.5 part, urethane emulsion [trade name: Hydran HW-930, Dainippon Ink & Chemicals, Inc. ), 50% solids] 30 parts, 50 parts water, 0.5 parts silicone antifoam, 3 parts thickener for water-based ink, 1 part ethylene glycol, 3 parts blocked isocyanate crosslinking agent Using a stir-up pink 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 pin on the fabric (fabric layer 22). A dark blue porous layer 6 was formed. Further, a pen housing portion 41 was sewn near the colored layer 21.

  Further, a foam body 24 is disposed inside the side wall 2 on the side wall 2 of the bag body formed by sewing the polyurethane base 25 and sewing the zipper 3, the gusset 4, the handle 5 and the like. After disposing a polypropylene resin sheet as the waterproof layer 23, the water discoloration drawing bag 1 is formed by sewing the fabric layer 22 to the base portion 25.

  The bag 1 is set with a pen 71 (water is stored in a shaft tube and a fiber processing pen body is provided), and the pen 71 is provided in a side wall 2 (2b). 41 can be accommodated and is difficult to lose when carried.

The zipper 3 is provided with two reversible open / close sliders that can be operated from both the front and back sides, and the three sides of the base 25 (peripheral walls excluding the bottom wall portion) so that the side wall portions 2 can be opened in a spread state. Open / close means sewn to the portion).
The gusset portion 4 is a portion that becomes the bottom wall of the bag 1 and is configured so as to secure an accommodation space in the bag and to prevent the porous layers 6 located on both side wall portions 2a and 2b from contacting each other when closed. ing.
The said handle part 5 is provided above each side wall part 2, and it is comprised so that the infant can suspend the bag 1 and can carry it easily.

The water discoloration drawing bag 1 has a capacity in a closed state and is easy to carry. Further, in the spread state in which the upper side and the three sides on both sides are opened, writing can be performed over a wide range, and writing in the porous layer 6 is possible even in a closed state with the front and back sides reversed.
When an image was drawn on the pink porous layer 6 with the pen 71 in the dry state, the porous layer 6 in that portion became transparent, and the red written image 8 was visually recognized. The written image 8 was retained when the porous layer 6 was in a liquid-absorbing state, and when dried, it returned to its original pink color and became invisible, and this phenomenon could be repeated many times.
Further, when writing, the waterproof layer 23 served as an underlay, and a solid handwriting 8 could be formed even in a bag made of a soft material.

It is explanatory drawing of the spread state of the water discoloration drawing bag of this invention. It is a longitudinal cross-section explanatory drawing of a part of water-color-change drawing bag of FIG. It is explanatory drawing of the spread state of another water discoloration drawing bag of this invention. It is explanatory drawing of the spread state of another water discoloration drawing bag of this invention.

Explanation of symbols

1 Water discoloration drawing bag 2, 2a, 2b Side wall part 21 Pattern (colored layer)
22 fabric layer 23 waterproof layer 24 foam 25 base 3 zipper 4 gusset part 41 pen accommodation part (holding part)
42 Mooring section 43 Stamp storage section (holding section)
44 Template storage part 5 Handle part 6, 6a, 6b Porous layer 7 Water adhesion means 71 Pen 72 Stamp 8 Written image 9 Template

Claims (11)

  A bag whose pair of side wall portions can be opened and closed in a spread state, wherein a low refractive index pigment is fixed to a binder resin in a dispersed state on at least one of the side wall portions, and is transparent in a liquid absorbing state and a non-liquid absorbing state. A water discoloration drawing bag provided with a porous layer having different layers.   A bag having a pair of side wall portions that can be opened and closed in a spread state, and has a low refractive index pigment fixed to a binder resin in a dispersed state on each inner surface of the side wall portion, and is transparent in a liquid absorbing state and a non-liquid absorbing state. A water discoloration drawing bag in which a porous layer having different layers is provided, and each porous layer is colored in a different color.   A bag whose pair of side wall portions can be opened and closed in a spread state, and in a liquid absorption state and a non-liquid absorption state in which a low refractive index pigment is fixed in a dispersed state to a binder resin on substantially the entire surface when the spread state is achieved. A water discoloration drawing bag provided with a porous layer having different transparency.   The water discoloration drawing bag according to any one of claims 1 to 3, wherein a waterproof layer is provided on a lower surface of the porous layer.   The water discoloration drawing bag according to claim 1, wherein the bag has a handle portion.   The water discoloration drawing bag according to claim 1, wherein the bag has an opening / closing means.   The water discoloration drawing bag according to claim 6, wherein the opening / closing means is a fastener operable from both front and back sides.     A water discoloration drawing bag set comprising the water discoloration drawing bag according to claim 1 and water adhering means.   The water discoloration drawing bag set according to claim 8, wherein the water discoloration drawing bag is provided with a holding portion for holding water adhering means.   10. The water adhering means is at least one selected from 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 pen tip member. Bag set for drawing water discoloration.   The water discoloration drawing bag set according to any one of claims 8 to 10, comprising a template.

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