JP2009113434A - Method for manufacturing fire extinguishing printed matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for advantageously manufacturing, with excellent productivity, fire extinguishing printed matter uniformly printed with high density without crushing microcapsules each containing a fire extinguishing agent, and exhibiting excellent fire extinguishing performance. <P>SOLUTION: A fire extinguishing ink formed by containing and dispersing the microcapsules 14 each containing the fire extinguishing agent and bursting with the heat of fire, in an organic ink is printed on a base material sheet 12 by a screen printing method to form a fire extinguishing printing layer 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for producing a fire-extinguishing printed matter, and more particularly to a method for producing a fire-extinguishing printed matter by printing ink containing microcapsules containing a fire extinguishing agent.

  In recent years, many fire accidents have been reported from home appliances, particularly lithium batteries incorporated in home appliances. As a countermeasure, a fundamental solution to prevent ignition is of course necessary, but in anticipation of an unexpected situation, it is necessary to take measures to self-extinguish the fire within the product or delay the spread of fire. Yes.

  For example, in buildings such as houses, flame retardant resin materials with flame retardants added and resin materials with inorganic coatings applied to the surface are widely adopted as interior materials etc. as fire prevention measures. It has become to. However, these resin materials are somewhat suppressed in combustion and difficult to burn, but cannot completely stop combustion and do not extinguish the generated flame.

  On the other hand, Patent Document 1 proposes a self-extinguishing sheet obtained by applying a paint in which fire-extinguishing microcapsules containing a fire extinguishing agent are uniformly dispersed inside the capsule. Such a self-extinguishing sheet is proposed. By using, it is possible to extinguish the fire even when ignited by its self-extinguishing action. However, in such a self-extinguishing sheet, since a non-flammable inorganic paint is used as a paint, there is a merit that the paint film itself is difficult to ignite. The microcapsules contained in the film are hardly ruptured, and therefore, there is an inherent problem that the release of the fire extinguishing agent is delayed.

  Moreover, in patent document 1, since the coating material containing a fire extinguishing microcapsule is coated on the base material using the gravure coater, it is pressed by the pressure roller (impression cylinder) at the time of printing, and fire extinguishing micrometer There is also a problem that the capsule is crushed and the extinguishing agent leaks. In addition, gravure printing cannot use high-viscosity paint, and it is necessary to lower the viscosity of the paint and increase its fluidity. In addition, there is a problem that the thickness of the printing layer becomes thin, and for this reason, the amount of fire-extinguishing microcapsules contained per unit area of the coating film is small, and the fire-extinguishing effect by the fire-extinguishing agent is sufficiently exhibited. There was a risk that it could not be done.

  Under such circumstances, in order to further enhance the self-extinguishing performance by the fire extinguishing agent, a large amount of microcapsules, for example, microcapsules having substantially the same weight as the ink, were mixed and mixed to prepare a fire-extinguishing ink. Fire extinguishing inks have very low fluidity, high viscosity, and become prickly. And even if it tries to apply | coat the fire-extinguishing ink on a base material using a brush, a fire-extinguishing ink will not stick to a brush and it will become very difficult to apply | coat. However, if the content of the microcapsules contained in the fire-extinguishing ink is reduced and the fire-extinguishing ink is applied in the same manner with a brush, the microcapsules will not be crushed unlike the gravure printing described above. Sometimes, the dispersion state of the microcapsules deteriorates, so that the microcapsules cannot be uniformly distributed and contained in the coating film. In addition, in the coating using a brush, the thickness of the coating film is more than necessary. The problem of thickening is also inherent.

  Patent Document 2 proposes a fire extinguishing material composed of 40 to 60% by weight of a curable resin binder and the remainder being a microencapsulated dibromomethane extinguisher, in which the fire extinguishing material is manufactured by molding. Therefore, in addition to poor production efficiency, it was difficult to reduce the thickness of the fire extinguishing material, and it was difficult to produce the fire extinguishing material at low cost.

JP-A-5-84873 JP 2007-160028 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is that printing is performed at high density and uniformly without crushing the microcapsules containing the fire extinguishing agent. Another object of the present invention is to provide a method for advantageously producing a fire-extinguishing print exhibiting excellent fire-extinguishing performance with good productivity.

  In the present invention, in order to solve such a problem, the gist of the invention is that the microcapsules containing the fire extinguisher and bursting by the heat of fire are contained and dispersed in the organic ink. The fire extinguishing ink is printed on a substrate by a screen printing method to form a fire extinguishing print layer.

  In addition, according to one of the preferable aspects of the manufacturing method of the fire-extinguishing printed matter according to this invention, as said fire-extinguishing ink, the said microcapsule is 100-150 weight part with respect to 100 weight part of the said organic type ink. What is contained in an amount of the ratio is used.

  Moreover, according to one of the other preferable aspects in the manufacturing method of the fire-extinguishing printed matter according to this invention, the said fire-extinguishing printing layer is formed in the thickness of 10-600 micrometers.

  Furthermore, according to one of the other desirable aspects in the manufacturing method of the fire-extinguishing printed matter according to this invention, dibromomethane is employ | adopted as said fire extinguishing agent.

  In addition, according to another preferred embodiment of the method for producing a fire-extinguishing print according to the present invention, as the base material, printing in which an adhesive layer is provided on the surface opposite to the surface to be printed. And a release sheet laminated so as to be peelable from the adhesive layer of the printing sheet.

  Still further, according to another preferred embodiment of the method for producing a fire-extinguishing print according to the present invention, a release layer is formed on the substrate, and the fire-extinguishing print layer is formed on the release layer. Then, the base material is removed to produce a fire-extinguishing sheet consisting only of the fire-extinguishing print layer.

  Thus, in the method for producing a fire-extinguishing print according to the present invention, the fire-extinguishing ink is printed by a screen printing technique to form a fire-extinguishing print layer. It is possible to advantageously prevent the extinguishing agent contained in the microcapsule from being crushed and leaking out. Moreover, according to the screen printing method, the production efficiency is improved and a high viscosity ink can be adopted as the fire extinguishing ink. That is, it is necessary to use a fire extinguishing ink with a large amount of microcapsules. Therefore, it is possible to uniformly contain and disperse more microcapsules in the fire-extinguishing print layer. As a result, the amount of microcapsules contained per unit area of the fire-extinguishing print layer increases, and the fire-extinguishing effect by the fire-extinguishing agent can be expressed very effectively.

  Moreover, in the method for producing a fire-extinguishing print according to the present invention, as an ink constituting the fire-extinguishing ink, an organic ink that is easy to burn is used, unlike the case of using a non-flammable inorganic paint, The microcapsules contained in the fire-extinguishing print layer are quickly ruptured by the heat of fire, so that the fire-extinguishing effect by the fire-extinguishing agent can be expressed at an early stage.

  Hereinafter, in order to clarify the present invention more specifically, a specific configuration of a printed matter according to the present invention will be described in detail with reference to the drawings.

  First, in FIG.1 and FIG.2, the fire extinguishing sheet | seat as one Embodiment of the fire extinguishing printed matter manufactured according to this invention is each schematically shown in the plane form and sectional form. As is clear from this figure, the fire-extinguishing sheet 10 of this embodiment has a base sheet 12 as a base, and a fire-extinguishing print layer 16 that uniformly contains a large amount of microcapsules 14 on the upper surface thereof. Is formed. In addition, in each of FIG. 2 and also FIG. 3 to FIG. 6 to be described later, in order to facilitate understanding of the structure of the fire-extinguishing printed matter, the base sheet, the fire-extinguishing printing layer, etc. are exaggerated and extremely It should be understood that it is shown with a thick thickness.

  More specifically, in the present embodiment, a rectangular seal-like sheet is used as the substrate sheet 12 to be printed. Such a base sheet 12 includes a rectangular thin plate-shaped printing sheet 18 made of a paper material, a synthetic resin material, a metal material, and the like, an adhesive layer 20 made of an adhesive or a pressure-sensitive adhesive, and peelability from the adhesive layer 20. And a rectangular thin plate-like release sheet 22 made of a good material, and these are laminated in the order of the printing sheet 18, the adhesive layer 20 and the release sheet 22. In other words, the base sheet 12 has a structure in which the release sheet 22 is superimposed on the surface on the adhesive layer 20 side of the printing sheet 18 provided with the adhesive layer 20. And in such a base material sheet 12, the upper surface is made into the to-be-printed surface 24, and the fire extinguishing print layer 16 is formed with respect to the substantially whole surface except the edge part of this to-be-printed surface 24. . Note that the release sheet 22 is peeled off and removed when the fire-extinguishing sheet 10 is used, like a general seal.

  In this embodiment, the fire-extinguishing print layer 16 is formed by printing a specific fire-extinguishing ink on the printing surface 24 of the base sheet 12 by a screen printing method. More specifically, as a fire extinguishing ink, an organic ink containing a microcapsule 14 containing a fire extinguishing agent is used, and this is used as a printing surface of the base sheet 12 using a known screen printing apparatus. 24, the fire-extinguishing print layer 16 is formed. Therefore, inside the fire-extinguishing print layer 16, as shown in an enlarged view in FIG. 14 is dispersed with high density and uniformity.

  Here, the microcapsules 14 contained in the fire-extinguishing ink are not particularly limited, and various known microcapsules 14 that contain a fire extinguishing agent and burst by the heat of fire are appropriately used. It is selected and used. Examples of the shell material (film material) constituting the microcapsule 14 include polymer materials such as gelatin, gum arabic, sodium alginate, carboxymethylcellulose, carrageenan, and polyvinyl alcohol. On the other hand, the fire-extinguishing agent contained in the microcapsule 14 may be any fire-extinguishing agent that can be microencapsulated according to a conventional method, such as halogenated hydrocarbons such as dibromomethane and tetrabromoethane, and water. In addition to fire extinguishing agents that are liquid at room temperature, carbonates, bicarbonates, and the like that are conventionally used as powder fire extinguishing agents can be mentioned. Among these, in particular, from the viewpoint of fire extinguishing performance, a microcapsule 14 containing a protein such as gelatin in which dibromomethane is encapsulated as a fire extinguisher is preferably employed.

  In addition, the particle size of the microcapsule 14 is usually in the micron order (1 μm to 1000 μm). However, if the particle size of the microcapsule 14 is too small, the fire extinguishing agent contained is small and a sufficient fire extinguishing effect is obtained. In addition, when the particle size of the microcapsule 14 is too large, the mixing property with the organic ink deteriorates, so that the particle size is preferably about 50 to 700 μm, more preferably about 100 to 400 μm. Is preferably employed. In the present invention, the particle size of the microcapsule 14 can be advantageously measured with an electron microscope or the like.

  By the way, when the microcapsule 14 employed in the present invention is heated by fire, its outer wall is ruptured (destroyed), so that the fire extinguisher contained therein is released to the outside. It has become. For example, when a liquid fire extinguisher such as dibromomethane is included as a fire extinguisher, the liquid fire extinguisher is mainly vaporized and expanded by the heat of the flame, and the outer wall of the microcapsule 14 is ruptured by the internal pressure. The gasified fire extinguishing agent is released to the outside. On the other hand, the one containing a powdery fire extinguisher such as carbonate as the fire extinguisher is destroyed by the outer wall of the microcapsule 14 being melted or burned by the heat of the flame and contained therein. A powder fire extinguisher is distributed around.

  On the other hand, the ink which is mixed with the microcapsule 14 as described above to constitute the fire-extinguishing ink is an organic component which is easily combusted as compared with the inorganic paint, such as a photosensitive prepolymer, a photosensitive prepolymer, and an organic resin. The composition is not particularly limited as long as it is an organic ink mainly composed of, and the like, and various conventionally known organic inks can be used, for example, ultraviolet curing that is cured by ultraviolet rays. It may be a mold ink, a solvent ink that evaporates and dry a solvent, or a thermosetting ink that is cured by heat. Among these known organic inks, those having no or little influence on the shell (film) of the microcapsule 14 and the fire extinguishing agent contained in the microcapsule 14 are desirable. Can be suitably employed. That is, the UV ink does not contain a solvent that is a volatile component in principle, so that there is no possibility that the solvent penetrates into the microcapsule 14 and there is no influence of the residual solvent. Moreover, the UV ink has an extremely small influence on the microcapsule 14 because it can be cured instantaneously by irradiation with ultraviolet rays without being exposed to a high temperature.

  In addition, various kinds of compounding agents such as inorganic pigments and organic pigments are conventionally added to organic inks. In the present invention, these compounding agents have an adverse effect on the microcapsules 14. It is desirable that those added in a range not selected are appropriately selected and used.

  And by using such an organic ink, the flame retardancy of the fire-extinguishing print layer 16 itself is reduced, and the fire-extinguishing print layer 16 is easily burned. The fire extinguisher contained when ruptured can express the fire extinguishing effect at an early stage.

  Here, the blending amount of the microcapsule 14 in the organic ink can be appropriately set according to the fire extinguishing performance and the like of the microcapsule 14 to be used. It is desirable to be contained in an amount of ~ 150 parts by weight. In this way, by containing the microcapsules 14 at a high concentration, the microcapsules 14 can be contained at a higher density in the fire-extinguishing print layer 16. That is, the content of the microcapsules 14 dispersed per unit area of the fire-extinguishing print layer 16 is further increased. When the amount of the microcapsule 14 is less than the above range, the fire extinguishing performance of the fire extinguishing sheet may be reduced. On the other hand, when it exceeds the above range, the fluidity of the fire extinguishing ink is significantly reduced. Printing by the screen printing method becomes difficult, and the amount of organic ink functioning as a binder decreases, and the microcapsules 14 may fall off the fire-extinguishing print layer 16 after printing.

  In preparing the fire-extinguishing ink, no special method is required, and a predetermined amount of microcapsules 14 may be added to and mixed with the organic ink. Can be prepared as a fire-extinguishing ink in which is uniformly dispersed.

  Thus, in order to manufacture the fire-extinguishing sheet 10 according to the present embodiment using the fire-extinguishing ink as described above, printing is performed on the printing surface 24 of the base sheet 12 by a known screen printing technique. It will be. By adopting this screen printing method, damage to the microcapsules 14 is reduced during printing, and the microcapsules 14 can be advantageously prevented from being crushed and leaking out the fire extinguishing agent contained therein. At the same time, it is possible to use a fire-extinguishing ink containing the microcapsules 14 at a high concentration. Further, according to the screen printing method, the thickness of the fire-extinguishing print layer 16 can be easily adjusted, so that not only a thin print layer formed by gravure printing but also a thick print layer can be formed. Is also possible.

  In the present invention, “screen printing” is printing performed using a known screen printing apparatus, and as a plate, a mesh made of silk, chemical fibers such as polyester and nylon, metal fibers such as stainless steel, etc. Printing is performed by using a screen screen or a metal mask plate and extruding ink with a squeegee.

  As a plate used for carrying out such screen printing, a screen plate or a metal mask having a sufficient opening (hole size) so that the microcapsules 14 contained in the fire extinguishing ink are not destroyed. Version is adopted. This opening is appropriately set according to the particle size of the microcapsule 14. For example, when the microcapsule 14 having a particle size of 100 to 400 μm is contained, a plate with an opening of 400 μm or more ( In the case of a screen plate, a plate having a mesh number of 40 or less, more preferably a plate having a mesh number of 430 μm or more (in the case of a screen plate, a plate having a mesh number of 30 or less) is preferably used. This is because if the opening is too small, the microcapsule 14 cannot pass through the hole (mesh), or even if it can pass through the hole, the microcapsule 14 is stressed and the microcapsule 14 is destroyed. This is because the microcapsules 14 may not be contained in the fire-extinguishing print layer 16 uniformly and at a high concentration. In addition, when using a screen plate as a plate, it is possible to print a solid pattern from where there is a wrinkle, but when using a metal mask plate, it is difficult to apply a solid because there is no wrinkle. Become. For this reason, when a metal mask plate is used, one having a dot pattern in which the upper limit of opening is 3.5 mm square or less is advantageously used.

  Further, the thickness of the plate used for screen printing may be appropriately set according to the particle size of the microcapsules 14 so as not to destroy the microcapsules 14 contained in the fire extinguishing ink. desirable. For example, when the particle size of the microcapsule 14 is 100 to 400 μm, a screen plate having a thickness of about 300 to 480 μm or a metal mask plate having a thickness of about 200 to 500 μm is advantageously used.

  And such a screen plate or a metal mask plate is attached to a screen printing apparatus, and a screen printing operation is carried out according to a conventional method, whereby a fire extinguishing made of fire extinguishing ink is applied on the printing surface 24 of the base sheet 12. The printing layer 16 is formed. At this time, the thickness of the fire extinguishing ink 16 is controlled by appropriately setting the thickness, opening, squeegee printing pressure, etc. of the plate, and the thickness of the fire extinguishing print layer 16 (average thickness when the surface is uneven) Is preferably 10 to 600 μm, more preferably 300 to 530 μm, depending on the particle size of the microcapsules 14. By setting it as such thickness, the microcapsule 14 is efficiently ruptured at the time of ignition, the fire extinguishing agent is released, and an excellent fire extinguishing effect can be realized. In addition, when the thickness of the fire-extinguishing print layer 16 is extremely thin as compared with the particle size of the microcapsule 14, the microcapsule 14 is easily dropped from the fire-extinguishing print layer 16. Moreover, when it is too thick, it causes a cost increase.

  In the present embodiment shown in FIGS. 1 to 3, as the fire-extinguishing ink, UV ink containing microcapsules 14 having a particle size of about 100 to 400 μm is used, and screen printing is performed. The average thickness of the fire-extinguishing print layer 16 formed on the printing surface 24 of the base sheet 12 is about 300 μm, which is smaller than the maximum diameter of the microcapsules 14. Therefore, in this embodiment, as shown in FIG. 3, a part of the microcapsule 14 is protruded from the surface of the fire-extinguishing print layer 16 in a state of being thinly coated with an organic resin, and the fire-extinguishing print layer 16. According to the shape of the microcapsule 14, the surface is an uneven surface. For this reason, the surface of the fire-extinguishing print layer 16 is smoothed, and the microcapsules 14 are contained so as to be entirely embedded in the fire-extinguishing print layer 16 without protruding on the surface of the fire-extinguishing print layer 16. As compared with the case, the heat of the fire is efficiently transmitted to the microcapsules 14 so that the microcapsules 14 can be ruptured (broken) earlier. Further, since there is a minimum amount of organic resin on the surface of the microcapsule 14, the fire extinguishing agent can be released over a wider range when the microcapsule 14 bursts.

  As described above, according to the method of the present invention, since the fire-extinguishing print layer 16 is formed by screen printing, printing can be performed without crushing the microcapsules 14 included in the fire-extinguishing ink. The fire-extinguishing effect can be utilized to the maximum. Moreover, it becomes possible to easily adjust the thickness of the fire-extinguishing print layer 16 to a desired range using a high-viscosity fire-extinguishing ink. Therefore, according to the present invention, it is possible to disperse the microcapsules 14 in the fire-extinguishing print layer 16 with high density and evenness, and the fire-extinguishing sheet 10 with effectively enhanced fire-extinguishing performance And can be easily manufactured. Further, according to the method of the present invention, it becomes possible to manufacture the fire extinguishing sheet 10 with excellent productivity by adopting the screen printing method, and therefore, the fire extinguishing sheet 10 can be produced in large quantities and economically. Can do.

  And in the fire extinguishing sheet | seat 10 manufactured in this way, as mentioned above, the fire extinguishing effect is remarkably improved, and fire extinguishing goods for extinguishing a flame, preventing or delaying the spread of fire. Therefore, it is advantageously used in various fields as a fire prevention article for the purpose. For example, the fire-extinguishing sheet 10 is cut into a desired size and shape as necessary, and then the release sheet 22 is peeled off, and the inner wall surface of the housing containing the parts that may cause ignition It is used by being affixed to a part where heat and flame are likely to reach, such as the inner surface of the lid. At this time, the size and shape of the fire-extinguishing sheet 10 are appropriately set according to the size and shape of the member to which fire-extinguishing properties should be imparted so that a desired fire-extinguishing performance can be ensured. The fire extinguishing print layer 16 of the affixed fire extinguishing sheet 10 was generated in the enclosure because a large number of microcapsules 14 were dispersed and contained uniformly and at a high density as described above. The flame can be extinguished early or the spread of fire can be effectively prevented or delayed.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, in the above example, the microcapsules 14 are uniformly dispersed in a single layer without overlapping in the thickness direction in the fire extinguishing print layer 16 (see FIG. 3). It goes without saying that the fire extinguishing print layer 16 may be contained so as to overlap in the thickness direction.

  Moreover, in the above example, a seal-like base material sheet 12 having an adhesive layer 20 was used as a base material, and a sheet-like fire extinguishing print was manufactured. The present invention is not limited to the illustrated examples, and any shape may be used as long as the fire-extinguishing print layer 16 made of fire-extinguishing ink can be formed. Specifically, there is no problem even if it is in the form of a sheet, plate, or film, and such a substrate may be flexible or hard. . In the above example, since the adhesive layer 20 was formed on the base sheet 12, it was possible to easily attach the fire extinguishing sheet 10 to a desired portion of the member to which fire extinguishing properties should be imparted. However, in the present invention, the adhesive layer 20 is not always necessary. When using a base material such as a sheet that is not provided with the adhesive layer 20, depending on the shape of the member to which fire extinguishing properties should be imparted, for example, mounting holes and engagement protrusions are provided on the base material. And it should just attach to the member which should give fire extinguishing property. Furthermore, it is also possible to directly form the fire-extinguishing print layer 16 using a member to which fire-extinguishing properties should be imparted (for example, a molded body having a casing shape or a lid shape) as a base material.

  Furthermore, the material of the base material is not limited to the examples, and depending on the member to which fire extinguishing properties should be imparted, in addition to paper and synthetic resin as described above, metal, a magnet having magnetism, Glass, ceramics, cloth, wood, etc. can be used.

  Moreover, in the said embodiment, although the fire-extinguishing sheet 10 formed by integrating the fire-extinguishing printing layer 16 and a base material (base material sheet 12) was manufactured as a fire-extinguishing print, in this invention, A thin-walled fire-extinguishing sheet consisting only of a fire-extinguishing print layer formed by screen printing of a fire-extinguishing ink can also be advantageously produced as a fire-extinguishing print according to the present invention with excellent productivity.

  In order to manufacture a fire-extinguishing sheet composed only of such a fire-extinguishing print layer, for example, as shown in FIG. 4, first, a release layer 26 having releasability was formed as a base material. A base sheet 28 is used. The release layer 26 is formed by applying a coating liquid containing a silicone resin or the like as an essential component to the surface of the printing sheet 18. Then, screen printing is performed on the surface of the release layer 26 in the same manner as in the above embodiment to form the fire-extinguishing print layer 16 having a structure in which the microcapsules 14 are fixed with an organic resin. Thereafter, as shown in FIG. 5, the base sheet 28 on which the release layer 26 is formed is peeled off from the fire-extinguishing print layer 16 to remove only the fire-extinguishing print layer 16 as shown in FIG. The fire-extinguishing sheet | seat 30 which consists of will be formed. In addition, in FIGS. 4-6, about the site | part made into the structure similar to the said embodiment, the detailed description was abbreviate | omitted by providing the code | symbol same as the above-mentioned embodiment in the figure.

  In the above example, the fire-extinguishing print layer 16 is printed in a rectangular shape over substantially the entire surface of the base sheet 12 (see FIG. 1), but the print pattern of the fire-extinguishing print layer 16 is a solid pattern. Needless to say, the present invention is not limited in any way, and various patterns can be adopted. However, when a metal mask plate is used, a dot-like pattern is preferably adopted because solid coating is difficult as described above.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

  In the following, some representative embodiments of the present invention will be shown and the features of the present invention will be further clarified, but the present invention is subject to any restrictions by the description of such embodiments. It goes without saying that it is not a thing.

Example 1
First, as a microcapsule containing a fire extinguisher, an orange protein material microcapsule (distributor: Vision Development Co., Ltd., particle size: about 100 to 400 μm) containing liquid dibromomethane (CH ₂ Br ₂ ) On the other hand, a transparent ultraviolet curable screen ink (trade name: 6100SL medium, manufacturer: Jujo Chemical Co., Ltd.) was prepared as an organic ink. Then, a fire-extinguishing ink was prepared by adding and mixing the microcapsules to the organic ink in a weight ratio of organic ink: microcapsules = 1: 1.5.

  Thereafter, a screen plate made of a 40 mesh polyester plate (thickness: 340 μm) is set in a screen printing apparatus (model number: Minomat 5575, manufacturer: Mino Group Co., Ltd.), and the above fire extinguishing is performed by a known screen printing method. The fire extinguishing ink was cured by applying a solid ink to the surface of the base material and subsequently irradiating it with ultraviolet rays to prepare a fire extinguishing sheet. In addition, as a base material, the sheet | seat with a white adhesive (A brand name: PETWH50 (A) PA-T1 11LL, a manufacturer: Lintec Corporation, thickness: 50 micrometers) was used.

  On the surface of the base material of the fire-extinguishing sheet thus produced, a fire-extinguishing print layer was formed with an average thickness of about 300 μm. In addition, the fire-extinguishing print layer was uniformly contained without being crushed in a dispersion amount that occupies an area of about 70% of the printed surface without overlapping microcapsules in the thickness direction.

  And in order to evaluate fire extinguishing property, when the following fire extinguishing test was done, it was able to extinguish in about 10 seconds.

<Fire extinguishing test>
(1) First, as shown in FIG. 7, a tin can having a height of 93 mm, a bottom surface diameter of 130 mmφ, and an upper opening end diameter of 135 mmφ is prepared, and a portion 10 mm high from the bottom surface of the tin can. In addition, four holes having a diameter of 5 mm were formed at intervals in the circumferential direction, which were used as air holes for taking in air.
(2) On the other hand, the fire extinguishing sheet obtained above was pasted on the inner surface of the lid of the tin can so as to be 80 mm × 80 mm.
(2) A cloth soaked with xylene (about 5 g) was placed in the tin can, and after sprinkling 15 ml of xylene from above, the cloth was ignited.
(3) Immediately after ignition, a spacer with an air hole having a height of about 15 mm was placed on the opening end of the tin can. Then, a tin lid with a fire extinguishing sheet was put on the spacer, and the time until the flame of the tin can disappeared was measured. At this time, the tin can was sufficiently supplied with air from the air holes provided on the bottom side and the air holes provided in the spacer.

(Example 2)
A screen printing machine was used in the same manner as in Example 1 above, except that a metal mask plate (thickness: 200 μm) having a dot pattern as shown in FIG. 8 was used in place of the 40-mesh polyester plate. Then, printing was performed, and then the fire-extinguishing ink was cured by irradiating with ultraviolet rays to prepare a fire-extinguishing sheet.

  On the surface of the base material of the fire-extinguishing sheet thus produced, a fire-extinguishing print layer was formed with a thickness of about 530 μm. In addition, the fire-extinguishing print layer was uniformly contained without being crushed in a dispersion amount that occupies an area of about 100% of the printed surface in a state where the microcapsules overlapped in the thickness direction.

  Then, using the fire extinguishing sheet according to Example 2 obtained in this manner, a fire extinguishing test was performed in the same manner as in Example 1. As a result, the fire could be extinguished in 15 seconds.

(Comparative Example 1)
For comparison, a fire extinguishing test similar to that in Example 1 was performed using a lid without a fire extinguishing sheet. As a result, a small explosion occurred after 54 seconds and continued to burn after that.

  As is clear from the above results, in Comparative Example 1 in which no fire extinguishing sheet was used, fire extinguishing could not be performed and a small explosion was caused, whereas fire extinguishing properties according to Example 1 and Example 2 were exhibited. When the sheet was used, it was confirmed that fire extinguishing was performed in about 10 seconds and 15 seconds, respectively, and an excellent fire extinguishing effect was exhibited.

It is a plane explanatory view showing one embodiment of a fire-extinguishing printed matter manufactured according to the present invention. It is II-II sectional explanatory drawing in FIG. FIG. 3 is a partially enlarged explanatory view in FIG. 2. It is sectional explanatory drawing for demonstrating the process of manufacturing the fire-extinguishing printed material different from FIG. 1 according to this invention. FIG. 5 is an explanatory cross-sectional view showing a process of removing the base shown in FIG. 4 according to the present invention. FIG. 6 is a cross-sectional explanatory view showing another embodiment of the fire-extinguishing printed matter manufactured according to the present invention, and shows a state where the substrate shown in FIG. 5 is removed. It is sectional explanatory drawing for demonstrating the fire-extinguishing test performed in the Example. It is plane explanatory drawing for demonstrating the dot pattern of the metal mask plate used in the Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,30 Fire extinguishing sheet 12,28 Base sheet 14 Microcapsule 16 Fire extinguishing printing layer 18 Printing sheet 20 Adhesive layer 22 Release sheet 24 Printed surface 26 Release layer

Claims (6)

  A fire-extinguishing ink that contains fire-extinguishing agent and ruptures by the heat of fire is contained in organic ink and dispersed in a fire-extinguishing ink printed on a substrate using a screen printing technique to form a fire-extinguishing print layer A method for producing a fire-extinguishing printed material.   The fire-extinguishing property according to claim 1, wherein the fire-extinguishing ink is one in which the microcapsule is contained in an amount of 100 to 150 parts by weight with respect to 100 parts by weight of the organic ink. Manufacturing method of printed matter.   The method for producing a fire-extinguishing print according to claim 1 or 2, wherein the fire-extinguishing print layer is formed in a thickness of 10 to 600 µm.   The method for producing a fire-extinguishing print according to any one of claims 1 to 3, wherein the fire extinguishing agent is dibromomethane.   As the substrate, a printing sheet in which an adhesive layer is provided on a surface opposite to a surface to be printed, and a release sheet laminated so as to be peelable from the adhesive layer of the printing sheet are provided. The method for producing a fire-extinguishing printed matter according to any one of claims 1 to 4, wherein a material is used. Forming a release layer on the base material, forming the fire-extinguishing print layer on the release layer, and then removing the base material to form the fire-extinguishing sheet consisting only of the fire-extinguishing print layer The manufacturing method of the fire-extinguishing printed matter of any one of Claim 1 thru | or 4 which manufactures.

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