KR20010029419A - Recording material - Google Patents

Abstract

PURPOSE: A recording material is provided to clearly record figures and characters without accompanying bleeding or the like when the figures and characters or the like are recorded by presently existing various kinds of recording methods. CONSTITUTION: At least on one surface of a base material, a resin layer jointly containing a larger particle diameter sponge silica, of which the particle diameter is 8 to 18 microns, and a smaller particle diameter sponge silica, of which the particle diameter is 1 to 7 microns, is provided as a recording accepting layer for this recording material. The sponge silica means a silica of a sponge structure having a fine pore in the silica particle. The fine pore volume of the sponge silica used for this recording material preferably is 0.7 to 7 ml (milliliter)/g, and preferably is 0.8 to 4 ml/g. When the fine pore volume of the sponge silica is too small, there is a tendency that the recording accepting property of the accepting layer becomes lower.

Description

Recording material

The present invention relates to a recording material for use in recording by a visual recording method such as printing, writing or the like.

Usually, printing by oil-based ink, water-based ink and UV-curable ink, plastic sheet or the like, toner printing (copying by copier), thermal transfer printing, inkjet printing, writing by water pen, writing by oil pen, writing by pencil In the case of performing various existing recordings such as stamp sealing, scarlet ink pad sealing, and the like, it is difficult to efficiently perform all recordings on a kind of recording material, especially a recording material on which a plastic sheet is a substrate.

Therefore, in various recording methods, the receiving layer corresponding to the recording method is provided on a surface such as a plastic sheet, and then various recordings are generally performed.

However, since the recording receiving layer corresponding to the recording method must be provided in various recording methods in accordance with the above-described method, complexity is inevitably likely to occur.

It is therefore an object of the present invention to provide a recording material provided with a multifunctional recording receiving layer which can be copied by various recording methods as described above.

In addition, another object of the present invention is that when the recording is carried out by a pattern, a character, or the like by the above-mentioned various existing recording methods, the pattern or the character is clearly recorded without spots or stains, and the recorded pattern or character is excellent. It is to provide a recording material having strength, for example, excellent water resistance, friction resistance and the like.

In order to solve the above problem, a recording layer provided on at least one side of a substrate as a recording receiving layer is provided with a resin layer containing both large particle size silica having a particle size of 8 to 18 μm and small particle size silica having a particle size of 1 to 7 μm. Provide the material.

The substrate used in the present invention is not particularly limited in the case where the substrate is a material from which a recording receiving layer can be provided, but the effect of the present invention is particularly great in a material in which the substrate itself does not contain a plurality of species having recording water solubility. As the above recording material, films, sheets, plates, spin-coated CD disks and the like made of polyethylene, polypropylene, polyester, polycarbonate, polymethacrylate, metal and the like are exemplified. In addition, as the substrate of the present invention, paper, synthetic paper and the like can also be exemplified.

The pore volume of silica used in the present invention is preferably 0.7 to 7 ml / g, particularly preferably 0.8 to 4 ml / g. When the pore volume of silica is too small, there exists a tendency for the recording water solubility of a water receiving layer to fall. In addition, if the pore volume of silica is too large, the viscosity of the resin liquid substance constituting the receiving layer is so high that the coating operation tends to be remarkably difficult in producing the recording material (according to the tenth aspect of the present invention).

As the resin liquid material, a resin solution, a resin emulsion, a molten hot melt resin, a two-part curable uncured resin, an ultraviolet curable uncured resin, and the like can be exemplified. As the curing operation after coating or printing the above resin formulation on a substrate, evaporation, cooling or heating of the solvent or dispersion medium, ultraviolet irradiation, or the like is adopted for each material. Preference is given to using water-insoluble resins in order to achieve good water resistance according to the invention.

Both large particle size silica and small particle size silica are used in the recording receiving layer of the present invention. The large particle size silica has a particle size of 8-18 μm. If only large particle size silica is used, silica precipitation will occur in the resin formulation, and it will be easy to cause a change in quality in the receiving layer, and the defects such as deterioration in the friction resistance of the receiving layer will occur.

In addition, if only small particle size silica having a particle size of 1 to 7 mu m is used, the receiving performance is reduced, and the object of the present invention cannot be achieved.

Also, in the ratio of the amount of large particle size silica to the amount of small particle size silica used, the weight ratio of the small particle size silica to the large particle size silica is preferably about 0.1 to 5. By using this ratio, it becomes easy to eliminate both drawbacks and maintain the advantages as a synergistic action.

In addition, the recording receiving layer of the present invention contains silica and resin. In the relationship between the amount of silica and the amount of resin, too much silica reduces the friction resistance of the recording receiving layer, while too much amount of resin degrades the storage performance. Thus, silica 100pts.wt. Preference is given to sugar resins 15 to 150 pts.wt.

In addition, the pore volume of silica is preferably about 0.8 to 4 ml / g as described above. If the pore volume is too small, the acceptance performance is lowered, and the friction resistance tends to be reduced as well. If the pore volume ratio is too large, the strength, such as friction resistance of the recording receiving layer, tends to decrease. In addition, the pore volumes of large particle size silica and small particle size silica need not necessarily be identical.

In addition to the silica and binder resins, additives such as silica, surfactants, leveling agents, dye fixatives, various pigments, various fillers, and the like, in addition to silica and binder resins, may sometimes be used in the receiving layer of the present invention depending on the object demand.

Sponge silica, which is a structural material according to the present invention, will be described, and sponge silica means silica of a sponge-like structure having many pores in silica particles. As the production of silica, a precipitation method and a gelation method exist, and it is possible to obtain silica having sufficient pore volume when using the gelation method. Therefore, it is preferable that the sponge silica which is a structural material according to the present invention is produced by the gelling method.

The present invention also provides a recording material in which a receiving layer is supplied to one side of a plastic sheet and an adhesive layer is supplied to the other side. This adhesive layer is preferably free to peel off and reattach. The above-described freely peeling adhesive layer is formed by applying or drying an adhesive solution or emulsion containing an adhesive small sphere having a particle size of 2 to 100 µm to the substrate, or by applying radiation curable ink to the substrate and then irradiating with radiation. Is formed.

As the application method, screen printing, offset printing, gravure printing, flexor printing, letterpress printing, roll coating, spray coating and the like can be used, and screen printing in which the film thickness of the adhesive layer can be increased is most suitable. When the adhesive layer is formed, the printing or covering pattern may be all of the set solids, the set lines, the set points, or the designed sets, and the printing or covering is performed in an area of at least 10%, preferably at least 20%, of the sheet-like substrate. Can be. The film thickness of the adhesive layer is preferably 4 µm or more, and in view of re-peeling and adhesion stability, the film thickness is particularly preferably 10 µm or more.

Description of the Preferred Aspects

50 pts.wt of silica with a pore volume of 1.9 mL / g and a particle size of 11 μm, 50 pts.wt of sponge silica with a pore volume of 1.7 mL / g and a particle size of 5 μm. And a coating formulation consisting of an acrylate latex 500pts.wt. With a resin concentration of 10% on the polyester sheet, and then water is heated and evaporated to form the recording material A provided with an aqueous layer on one side of the polyester sheet. In addition, recording materials B, C, D, E, F, and G are produced according to similar steps. Table 1 shows the composition of the receiving layer of the recording material.

Recording material Large particle size silica Small particle size silica Suzy A 50 pts.wt. with a pore volume of 1.9 mL / g and a particle size of 11 μm. 50 pts.wt. with a pore volume of 1.7 mL / g and a particle size of 5 μm. Acrylate 50pts.wt. B Silica 80pts.wt. Silica 20pts.wt. The above resin 50pts.wt. C Silica 20pts.wt. Silica 80pts.wt. The above resin 50pts.wt. D Silica 50pts.wt. Silica 50pts.wt. Resin 100pts.wt. E 50 pts.wt. with a pore volume of 1.0 mL / g and a particle size of 12 μm. 50 pts.wt. with a pore volume of 3.0 ml / g and a particle size of 5 μm. The above resin 50pts.wt. F - 100 pts.wt. with a pore volume of 1.7 mL / g and a particle size of 5 μm. The above resin 50pts.wt. G 50 pts.wt. of bispongy silica having a pore volume of 0.1 ml / g or less and a particle size of 11 mu m. 50 pts.wt. of bispongy silica having a pore volume of 0.1 ml / g or less and a particle size of 5 mu m. The above resin 50pts.wt.

Subsequently, the same characters and designs are applied to oil ink printing, toner printing (copying by copying machine), thermal transfer printing, inkjet printing, recording by aqueous pen, recording by pencil, stamp sealing, or scarlet ink pad sealing. Is recorded in the receiving layer of the above-mentioned recording materials A to G, and the results are shown in Table 2. As shown in Table 2, Embodiments 1 to 5 use recording materials A to E shown in Table 1, and Comparative Examples 1 and 2 use recording materials F and G, respectively.

Aspects and Comparative Examples Recording material Record Method and Evaluation Oil ink printing Toner Print (Copy by Copier) Heat transfer printing Inkjet printing Aqueous pen records Oily pen records Pencil record Stamp sealing Scarlet Ink Pad Sealing Aspect 1 A ○ ○ ○ ○ ○ ○ ○ ○ ○ Aspect 2 B ○ ○ ○ ○ ○ ○ ○ ○ ○ Aspect 3 C ○ ○ ○ ○ ○ ○ ○ ○ ○ Aspect 4 D ○ ○ ○ ○ ○ ○ ○ ○ ○ Embodiment 5 E ○ ○ ○ ○ ○ ○ ○ ○ ○ Comparative Example 1 F ○ ○ Ｘ Ｘ Ｘ ○ ○ Ｘ Ｘ Comparative Example 2 G ○ ○ Ｘ Ｘ Ｘ ○ ○ Ｘ Ｘ

However, in Table 2, mark ○ indicates both excellent clarity and friction resistance of the recording, and mark 을 indicates that one or both of them are inferior. Incidentally, the clarity of the record is determined by visual observation. In addition, the friction resistance is determined depending on whether the characters and patterns are smeared by rubbing the printed, written and sealed characters and patterns with a finger.

As can be seen from Table 2, Embodiments 1 to 5 describe various existing recording methods [oil-based ink printing, toner printing (copying by a copying machine), thermal transfer printing, inkjet printing, recording with an aqueous pen, and oil-based pens. Recording, pencil writing, stamp sealing and scarlet ink pad sealing] have excellent clarity and friction resistance.

In addition, an adhesive layer or a freely peeling adhesive layer is provided on the back side of the sheet of the above embodiments 1 to 5 to obtain a sheet which is excellent in clarity and friction resistance of the recording and which can be held on a glass surface, a desk surface or the like by the adhesive layer. Can be.

As described above, according to the present invention, when the recording is performed in a pattern, a character, or the like by various existing recording methods, the pattern or character is clearly recorded without ink staining, and the recorded pattern or character is excellent in strength, eg For example, it is possible to provide a recording material that exhibits excellent friction resistance and the like. It is also possible to provide a recording material which is excellent in vivid recording and friction resistance and which can be attached or re-peeled.

Claims (10)

A recording material provided on at least one side of a substrate as a recording receiving layer, a resin layer containing both large particle size silica having a particle size of 8 to 18 μm and small particle size silica having a particle size of 1 to 7 μm. A recording material according to claim 1, wherein the weight ratio of small particle size silica to large particle size silica is 0.1 to 5. The recording material according to claim 1 or 2, wherein the pore volumes of the large particle size silica and the small particle size silica are 0.8 to 4 ml / g. The method of claim 1, wherein the resin layer is 100 pts.wt. of the total weight of silica. A recording material containing a sugar resin of 15 to 150 pts.wt. The recording material according to any one of claims 1 to 4, wherein the silica is sponge silica. The recording material according to any one of claims 1 to 5, wherein silica is produced by a gelling method. The recording material according to any one of claims 1 to 6, wherein the substrate is a plastic sheet. 8. The recording material according to claim 7, wherein a recording receiving layer is provided on one side of the plastic sheet and an adhesive layer is provided on the other side. 9. The recording material of claim 8, wherein the adhesive layer is made of an adhesive capable of freely peeling and reattaching. A method for producing a recording material according to any one of claims 1 to 7, comprising silica coating or printing a liquid material scattered in a resin liquid material on a substrate and then curing the resin.