KR100731519B1 - A recording material and a method of manufacturing the same - Google Patents

Abstract

The present invention provides a resin layer containing both a large particle size sponge silica having a particle size of 8 to 18 μm and a small particle size sponge silica having a particle size of 1 to 7 μm as a recording collecting layer on at least one side of the substrate. Provide recording material. Sponge silica means silica of a sponge-type structure which has many pore in a silica particle. 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. If the pore volume of the sponge silica is too small, there is a tendency that the recording collectability of the collection layer is lowered.

Recording material, sponge silica, recording collection layer, plastic sheet, printing, writing, gelling, sedimentation.

Description

A recording material and a method of manufacturing the same

The present invention relates to a recording material for use in recording by visual recording methods such as printing and writing.

Usually, printing by oil-based ink, water-based ink and UV-curable ink, plastic sheet, etc., 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 based on a plastic sheet.

Thus, in each recording method, a collecting layer corresponding to the recording method is provided on a surface such as a plastic sheet, and then each recording is generally performed.

However, a complicated procedure is inevitable because the recording collection layer corresponding to the recording method must be provided in each recording method according to the above-described method.

It is therefore an object of the present invention to provide a recording material provided with a multifunctional recording collection 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 performed in the form and characters by the various existing recording methods described above, the pattern or characters are clearly recorded without spots or stains, and the recorded patterns or characters are 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 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 is provided as a recording collection layer on at least one side of the substrate. Provided is a recording material provided.

The substrate to be used in the present invention is not particularly limited when the substrate is a material from which a recording collection layer can be provided, but the effect of the present invention is particularly effective in materials in which the substrate itself does not contain a plurality of species having record collection properties. Big. As such substrates, 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. If the pore volume of silica is too small, there exists a tendency for the record collection property of a collection layer to fall. In addition, if the pore volume of silica is too large, the viscosity of the resin liquid material constituting the collection layer becomes significantly high, making it difficult to perform the coating step in the production of the recording material (according to the tenth aspect of the present invention). There is a tendency.

As the resin liquid substance, 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 process after coating or printing the above-described resin formulation on a substrate, evaporation, cooling or heating of the solvent or dispersion medium, ultraviolet irradiation, or the like is adopted to suit each material. It is preferable to use a non-collecting resin in order to achieve excellent water resistance according to the present invention.

Both large particle size silica and small particle size silica are used in the recording collection 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 sedimentation occurs in the resin formulation, and it is easy to cause quality change in the collection layer, and the defects such as deterioration of the friction resistance of the collection layer occur.

In addition, if only small particle size silica having a particle size of 1 to 7 mu m is used, collection 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 these ratios, it becomes easy to eliminate the defects of each and maintain the advantages synergistically.

In addition, the recording collection 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 collection layer, and too much amount of resin degrades the collection performance. Therefore, it is preferable to use 15 to 150% by weight of resin per 100% by weight of silica.

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 collection performance is lowered, and the friction resistance also tends to be reduced. If the pore volume ratio is too large, the strength, such as the friction resistance of the recording collection 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, in addition to silica and binder resins, additives such as silica, surfactants, leveling agents, dye fixing agents, various pigments, various fillers, and the like, in addition to silica and binder resins, are sometimes used in the collection layer of the present invention depending on the needs of the intended object. Can be.

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 a plurality of pores in silica particles. As a method for producing silica, there is a precipitation method and a gelation method, and when using the gelation method, it is possible to obtain silica having a sufficient pore volume. Therefore, it is preferable that sponge silica which is a structural material which concerns on this invention is manufactured by the gelation method.

The present invention also provides a recording material in which a collecting 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 globule having a particle size of 2 to 100 μm on a substrate, or applying a radiation curable ink to the substrate, and then irradiating the radiation. It is formed by.

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. The printing or covering pattern when the adhesive layer is formed may be a whole cube set, a line set, a dot set, or a drawing set, and the printing or coating may be performed at an area of 10% or more, preferably 20% or more of the sheet-like substrate. Can be. Preferably the film thickness of an adhesive bond layer is 4 micrometers or more, and it is especially preferable that a film thickness is 10 micrometers or more from a viewpoint of re-peeling and adhesive stability.

Description of Preferred Embodiments

50% by weight of silica with pore volume of 1.9 ml / g and particle size of 11 μm, 50% by weight of sponge silica with pore volume of 1.7 ml / g and particle size of 5 μm and 500% by weight of acrylate emulsion with 10% resin concentration The coating formulation consisting of the above was coated on a polyester sheet, and then water was heated and evaporated to form a recording material A provided with a collecting 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 collection layer of the recording material.

 Recording material       Large particle size silica     Small particle size silica     Suzy      A  50% by weight silica with a pore volume of 1.9 ml / g and a particle size of 11 μm  50% by weight silica with a pore volume of 1.7 ml / g and a particle size of 5 μm 50% by weight of acrylate      B  80% by weight of the silica  20 wt% of the above silica 50% by weight of the above resin      C  20 wt% of the above silica  80% by weight of the silica 50% by weight of the above resin      D  50% by weight of the silica  50% by weight of the silica 100% by weight of the above resin      E  50% by weight silica with a pore volume of 1.0 ml / g and a particle size of 12 μm  50% by weight silica with a pore volume of 3.0 ml / g and a particle size of 5 μm 50% by weight of the above resin      F               -  100% by weight silica with a pore volume of 1.7 ml / g and a particle size of 5 μm 50% by weight of the above resin      G  50% by weight of bispongy silica with a pore volume of 0.1 ml / g or less and a particle size of 11 μm  50% by weight of bispongy silica with a pore volume of 0.1 ml / g or less and a particle size of 5 μm 50% by weight of the above resin

Subsequently, the same characters and patterns are printed by oil ink printing, toner printing (copying by copying machine), thermal transfer printing, inkjet printing, writing by aqueous pen, writing by pencil, stamp sealing or scarlet ink pad sealing. It records in the collection layer of said recording material A-G, and shows the result in Table 2. As shown in Table 2, Examples 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.

   Examples and Comparative Examples Recording material                           Record Method and Evaluation Oil ink printing  Toner Print (Copy by Copier) Heat transfer printing Inkjet printing Pen writing  Oil pen record  Pencil record Stamp sealing  Scarlet Ink Pad Sealing Example 1 A ○ ○ ○ ○ ○ ○ ○ ○ ○ Example 2 B ○ ○ ○ ○ ○ ○ ○ ○ ○ Example 3 C ○ ○ ○ ○ ○ ○ ○ ○ ○ Example 4 D ○ ○ ○ ○ ○ ○ ○ ○ ○ Example 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. Further, the friction resistance is determined depending on whether the characters and patterns are spread by rubbing the printed, written and sealed characters and patterns with a finger.

As can be seen from Table 2, Examples 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 by an aqueous pen, and oil-based pens. Recording, pencil writing, stamp sealing and scarlet ink pad sealing] are excellent in 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 Examples 1 to 5 described above, so that the sheet which is excellent in clarity and friction resistance of the recording and which can be held on a glass surface, a desk surface, etc. by the adhesive layer is Can be obtained.

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 clear recording and friction resistance and which can be attached or re-peeled.

Claims (10)

As a recording material, a resin layer containing both large particle size sponge silica having a particle size of 8 to 18 μm and small particle size sponge silica having a particle size of 1 to 7 μm is provided as a recording collection layer on at least one side of the substrate. And the pore volume of the large particle size silica and the small particle size silica is 0.7 to 7 ml / g, and the silica is produced by the gelling method. 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 sponge silica and the small particle size silica are 0.8 to 4 ml / g. The recording material according to claim 1 or 2, wherein the resin layer contains 15 to 150% by weight of resin per 100% by weight of total silica. delete delete The recording material according to claim 1 or 2, wherein the substrate is a plastic sheet. 8. The recording material according to claim 7, wherein the recording collecting layer is provided on one side of the plastic sheet and the adhesive layer is provided on the other side. 10. The recording material as claimed in claim 8, wherein the adhesive layer is made of an adhesive which can be freely peeled and attached again. A method for producing a recording material according to claim 1 or 2, comprising coating or printing a liquid substance onto which a silica is scattered in a resin liquid substance and then curing the resin.