JP2699285B2 - Method for producing overhead projector sheet by impact printer and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an impact printer capable of drawing extremely clear characters and images on a transparent sheet material of a recording medium by an impact printer represented by a wire dot printer. The present invention relates to a method for producing an overhead projector (OHP) sheet using a printer and a recording medium.

<Prior Art> An impact printer contacts an ink ribbon with a recording medium, and transfers, for example, oil-based ink adsorbed to the ink ribbon by striking with a wire dot, a hammer dot, or the like to the recording medium side to perform recording. It is what you do.

For the recording medium of this type of impact printer, general plain paper can be used, and it can cover a wide range of paper quality and paper thickness. You can also draw. Furthermore, it has features such as high reliability and stability as compared with other printer systems, and is therefore widely used at present.

On the other hand, as is well known, the OHP sheet is widely used in meetings, lectures, learning, and activities as a medium for projecting information on a screen. The production of this OHP sheet involves drawing characters and figures on a transparent sheet material by printer or PPC or handwriting, and projecting the drawn characters and figures on the screen by transmitting light through this transparent sheet material. However, most of the above-mentioned printers use the above-described impact printers.

<Problems to be solved by the invention> However, OHP produced by an impact printer
When the screen is projected on the screen, clear images cannot be obtained, and the ink on the OHP sheet has poor drying properties and poor adhesion. However, there is a disadvantage that a feed scratch is generated on the OHP sheet surface.

In view of the above problems, the present inventor has proposed a
No. -170077), a transparent sheet material obtained by coating a coating material which forms an ink-receiving layer in a film form softer than the base material on a transparent base material, and wherein the coating material is a wax component. We have proposed a recording material for impact printers using a material containing.

The above proposal is to create a concave by punching the coating layer with a hammer or wire,
Compared with the prior art, the ink fixing speed and the blackness of characters on an OHP screen were extremely excellent. But,
Since the surface of the ink receiving layer is soft and easily scratched, it is necessary to be careful when handling the ink receiving layer. When the head of the impact printer is moved, the ink receiving layer is scratched when it touches the coating layer, resulting in horizontal stripes. Alternatively, when printing is performed using the cut-sheet continuous paper feeder, the surface of the coating layer is touched and scratched in the transporting system of the recording material, resulting in vertical stripes. Furthermore, if only the transparent sheet material as described above is set, there is a problem that the paper sensor cannot detect the image depending on the type of the printer and the image cannot be drawn.

<Means for Solving the Problems> The present invention has been proposed in view of the above, and a recording medium in which a top sheet material and a transparent sheet material are polymerized is subjected to an impact printer from above the top sheet material. OHP by impact printer characterized by striking
The present invention relates to a method for manufacturing a sheet.

Further, the surface sheet material and the transparent sheet material are polymerized, and a transparent and softer film layer than the base material is formed on a surface of the transparent sheet material facing the surface sheet material. The present invention relates to a recording medium for an OHP sheet by an impact printer.

The above-mentioned surface sheet material has a softness that, when drawing with a hammer or wire of an impact printer from above the surface sheet material, the impact of the impact is transmitted to the transparent sheet material through the surface sheet material. is required.

Further, the surface sheet material needs to have flexibility and be supplied to the impact printer while being superimposed on the transparent sheet material.

As the surface sheet material as described above, paper, synthetic paper,
Non-woven fabrics and plastic sheets can be used.Specifically, thin paper such as newsprint paper, woodfree paper, uncoated printing paper such as reprinted paper, or coated printing paper such as art paper or coated paper, Packaging paper such as kraft paper and pure white roll paper, thin paper such as glassine paper and India paper, household thin paper such as tissue paper, and the like can be used.

In addition, a synthetic paper or the like prepared by coating a polyester film with a synthetic polymer material such as polystyrene can be used as the above-mentioned surface sheet material, or a synthetic paper manufactured by a fiber method using synthetic pulp can be used. Can also.

Furthermore, the components, structure, and configuration of the plastic sheet are not limited as long as it is flexible, has a smooth surface, and is thick enough to run in the printer. For example, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, fluorocarbon resin, polycarbonate, cellulose acetate, polyester, polyamide, polyimide, polyphenylene oxide, polysulfone, TPX polymer,
Sheets of polyparaxylene, chlorinated rubber, polyurethane, ionomer and the like can be used. Further, a plastic sheet subjected to a surface treatment such as lamination, lamination, vapor deposition, coating, and antistatic can also be used.

Then, the thickness of the top sheet material is required to be at least a thickness capable of transmitting the impact due to the impact of the impact printer to the transparent sheet material surface below the top sheet material, and is 500 μm or less, preferably It is 200 μm or less. If the thickness is 500 μm or more, the impact of the wire or hammer of the impact printer will not be easily transmitted to the transparent sheet material below it, or it will not be transmitted at all, and the drawing on the transparent sheet material will be blurred or unclear You can only do it. Although there is no limitation in the case where the thickness is thin, as described above, the first condition is that the impact of the impact is transmitted to the transparent sheet material through the surface sheet material, and the second condition is that the impact is produced while being polymerized with the transparent sheet material. What is necessary is just to have the flexibility which can be supplied to a printer.

Next, the transparent sheet material in the present invention is polymerized with the above-mentioned surface sheet material, and can be used as an OHP sheet after drawing by an impact printer.

As a base material of the above-mentioned transparent sheet material, a plastic sheet material having transparency and flexibility can be used, and examples thereof include transparent films such as polyethylene terephthalate, polycarbonate, polyacetal, polypropylene, and polyvinyl chloride. The thickness of the base material is, for example, in the range of 25 to 100 μm in the case of biaxially stretched polyethylene terephthalate, and the thickness may be appropriately determined according to the characteristics and purpose of the printer.

Further, the transparent sheet material used in the present invention is formed by forming a coating layer softer than the above-mentioned transparent substrate on the above-mentioned transparent substrate, and the coating agent forming the coating layer contains, for example, a wax component. It is composed. When a coating layer is formed on a substrate as this wax, it does not adversely affect the transparency of the substrate,
In addition, it is sufficient that a recess is formed by the impact of the impact printer, and a commercially available wax having the above-described conditions can be selected. For example, natural waxes include vegetable waxes such as carbana wax and rice wax, animal waxes such as beeswax, mineral waxes such as montan wax, okezolite and ceresin, petroleum waxes such as paraffin wax and microcrystalline wax, and synthetic waxes. Examples include synthetic hydrocarbon waxes such as Fischer-Tropsch wax and polyethylene wax, modified waxes such as montan wax derivatives, paraffin wax derivatives, microcrystalline wax derivatives, and hydrogenated waxes such as hydrogenated castor oil derivatives.
-Synthetic waxes such as fatty acids such as hydroxystearic acid, stearic acid amide, phthalic anhydride, chlorinated hydrocarbons, acid amides, esters and ketones can be used.

Further, in the coating agent, other components such as a resin and a powder can be blended with the above-mentioned wax in order to adjust the stability, physical strength and hardness of the coating layer.

As the resin to be mixed with the above-mentioned wax, a resin having good compatibility with waxes and having no adverse effect on the transparency of the base material when the coating layer is formed can be selected and used. For example, polyethylene resin, ethylene vinyl acetate copolymer resin, EVA modified polymer, ethylene-acrylate copolymer resin, ionomer resin, propylene,
Butene, diolefin, ethylene copolymer resin and polyamide resin, nylon resin with styrene and other copolymers,
Polyester resin, polypropylene resin or butyral resin, vinyl acetate-crotonic acid copolymer, vinyl acetate
Phthalic anhydride copolymer resin, vinyl acetate copolymer resin such as vinyl acetate-vinyl pyrrolidone, cellulose derivative, polymethyl methacrylate resin, polyvinyl ether resin, polyurethane resin, syndiotactic polypropylene, ethylene propylene resin, vinyl block copolymer Polymeric resins, rosin and rosin derivatives, terpene resins, cumarone-indene resins and the like can be used.

Also, as a powder, the dispersibility of the coating agent is good,
In addition, a material having good transparency can be selected and used. For example, silica, calcium carbonate, titanium oxide, talc, clay, barium sulfate and other inorganic powders and acrylics,
Organic powders composed of cross-linked polystyrene, acrylic-styrene copolymer, benzoguanamine resin, nylon resin, epoxy resin, phenol resin and the like can be used.

In addition to the three components described above, a dispersant, an ultraviolet ray inhibitor, a fluorescent brightener, an anti-settling agent, an antioxidant, a plasticizer, and the like can be added to the coating agent within a range not to impair the effects of the present invention. .

The composition of these coating agents is appropriately dispersed or dissolved in a dispersion medium to form a solution, or heated and melted to form a solvent-less, or a wax resin in the form of an emulsion and dispersed in water. Coating on the transparent substrate.

The dispersion medium used in the coating agent configured as described above may be any solvent that is compatible with the wax and the resin and can uniformly disperse the powder. For example, petroleum solvents such as toluene and xylene Polar solvents such as water, methyl ethyl ketone and dimethylformamide; and chlorine solvents such as trichloroethane, trichloroethylene and perchlorethylene.
Species or two or more can be used.

In addition, the thickness of the coating layer, which is coated with the coating agent and dried, is necessary to form a clear recess in the coating layer when the coating layer is hit from the surface sheet material by an impact printer,
The thickness should be 0.1 μm or more, and preferably 0.5 to 20 μm in consideration of performance and economy.

Furthermore, as a coating method, an air knife coater,
Bar coater, reverse coater, gravure coater,
A hot melt coater method or the like can be adopted.

As described above, the transparent sheet material in the present invention may be one in which a transparent coating layer is formed on a transparent base material, or other forms, for example, in which the constituents of the above-described base material and coating layer are melted, respectively. A composite sheet material may be prepared by manufacturing a product and integrally molding such as extrusion molding.

Further, since the method of manufacturing the OHP sheet of the present invention is to strike the upper surface sheet material with the impact printer as described above, since the transparent sheet material located below the surface sheet material is also drawn, Any transparent sheet material that can form a concave portion on the surface by the impact of the impact can be used.

Therefore, the transparent sheet material according to the present invention has such a flexibility that the created screen can form a concave portion on the front surface due to the impact of a bang, and has a hardness such that the created screen and the back surface are not easily damaged during transportation or the like. However, the present invention is not limited to the above-described embodiment as long as the sheet material has the following.

The recording medium for an OHP sheet of the present invention comprising the above-described surface sheet material and the transparent sheet material, for example, in order to prevent peeling of the surface sheet material and the transparent sheet material during handling or conveyance in an impact printer, for example, overlapping Although the method and form in which part or all of the upper end of the transparent top sheet material and the transparent sheet material are bonded via a removable adhesive layer are preferable in terms of practicability and applicability, the transparent sheet material and the surface If a material is selected such that the sheet material is electrostatically adsorbed, there is no particular need to bond both sheet materials. In addition, the method may be appropriately selected from known methods, and the configuration or method is not particularly limited.

Therefore, according to the OHP sheet manufacturing method of the present invention, the recording medium is hit from the surface sheet material side in the impact printer, so that the ink transferred from the ink ribbon is printed on the surface sheet material, and the transparent sheet material is printed. A concave portion is formed on the upper surface by being struck by a wire or a hammer through the surface sheet material, and the image is formed.

Since there is no ink in the concave portion on the transparent sheet material formed by hitting as described above, it is difficult to see as a normal printed matter, but when used as an OHP sheet, only the concave portion does not transmit light, When projected onto the screen, the recesses appear black.

On the other hand, the top sheet material is peeled off when the transparent sheet material is used as an OHP sheet, but since the same information is also written on the peeled top sheet material, the top sheet material is used as a copy of a copy can do.

<Example> 100 μm polyethylene terephthalate (manufactured by Toray Industries, Inc .:
Trade name Lumirror T) A coating material of the following various composition is applied to a film with a bar coater # 20 and dried to form a transparent sheet material. The recording material for an OHP sheet was produced using the impact printer of the present invention by laminating via a tape.

Example 1 Transparent sheet material coating composition Base material only (no coating layer) Surface sheet material: India paper Example 2 Transparent sheet material coating composition wax (polyethylene wax emulsion) 10 parts (Permarine FP-528: Sanyo Chemical Industries, Ltd.) 20 parts of water Surface sheet material: Pure white roll paper (basis weight 30 g / m ² ) Example 3 Transparent sheet material coating agent Wax (paraffin wax) 10 parts (SP-0145: Nippon Seirozu Co., Ltd.) Resin (Ethylene vinyl acetate copolymer) 2 parts (Evatate M5011: manufactured by Sumitomo Chemical Co., Ltd.) Xylene 20 parts Surface sheet material: India paper Example 4 Transparent sheet material coating composition Wax (polyethylene wax emulsion) 10 parts (Permarine KUE- 5: Sanyo Chemical Co., Ltd. Resin (Ethylene vinyl acetate copolymer) 1 part (Permarin UA-200: Sanyo Chemical Co., Ltd.) Powder (calcium carbonate) 01 parts (Newlight F: manufactured by Nitto Powder Co., Ltd.) Water 20 parts Surface sheet material: synthetic paper (FRP 60: manufactured by Oji Yuka Synthetic Paper Co., Ltd.) Example 5 Transparent sheet material coating agent compounding wax (microcrystalline wax) 2 parts (Hi-Mic-1080: manufactured by Nippon Seiro Co., Ltd.) Resin (petroleum resin) 0.5 part (Toho High Resin # 90: manufactured by Toho Petroleum Co., Ltd.) Powder (silicon oxide) 0.01 part (Syloid # 161: Fuji Devison 20 parts of xylene Surface sheet material: white vinyl chloride sheet 100 μm Example 6 Mixing of transparent sheet material coating agent Wax (polyethylene wax emulsion) 10 parts (Permarine FP-528: manufactured by Sanyo Chemical Co., Ltd.) Water 20 parts Surface sheet material : Nonwoven fabric Comparative Example 1 Transparent sheet material coating material Base material only (no coating layer) Surface sheet material: None Comparative Example 2 Transparent sheet material coating agent formulation Same as Example 3 Surface sheet material: None Comparative Example 3 Transparent sheet Surface material: Synthetic paper (FRP 60: manufactured by Oji Yuka Synthetic Paper Co., Ltd.) * However, the surface sheet material is polymerized facing the opposite surface of the transparent sheet material coating layer. did.

Comparative Example 4 Commercially available OHP recording material for impact printers (backing paper lamination type) (Evaluation method) Image quality Fujitsu Corporation wire dot printer FACOM6123
Set 10 sheets in the paper feed section of the HA 1 cut sheet feeder and print characters continuously, and the ones with extremely clear drawing on the transparent sheet material ○ The ones with slightly unclear printing Was determined to be Δ, and the results are shown in Table 1.

Feed scratches The transparent sheet material created above is judged on an OHP screen, and those with no vertical or horizontal scratches due to feed are judged as ○ 1 to 5 are judged as △ and those with 6 or more are judged as ×, The results are shown in Table 1.

Simultaneous image printability In the above, a sheet in which the transparent sheet material and the surface sheet material were simultaneously printed in one printing was determined as ○. A sheet in which only the surface sheet material was printed was judged as ×, and the results are shown in Table 1 below. .

As is clear from Table 1 above, Example 1 of the present invention
Nos. 6 to 6 are capable of performing image formation by hitting a transparent sheet material simultaneously with printing of a surface sheet material.
Therefore, since there is no ink on the screen of the transparent sheet material, no drying is required.

In contrast, in Comparative Examples 1 and 4, the image quality was poor, and in Comparative Example 3 in which the coating layer was formed on the opposite surface,
Printing was performed only on the top sheet material, and the printing quality on the transparent sheet material was poor. Furthermore, since the soft coating layer was on the outer surface, many scratches were generated.

<Effects of the Invention> As described above, in the method for producing an OHP sheet using the impact printer of the present invention, printing on the top sheet material and drawing on the transparent sheet material are simultaneously performed by a single hit in the impact printer. Therefore, the top sheet material can be used as it is as a reserve document.

Therefore, conventionally, after printing on paper or the like, it was copied on a transparent film by a copying machine to produce an OHP sheet. However, according to the production method of the present invention, as described above, the conventional labor and use of the copying machine were , And an OHP sheet and a copy for a copy can be easily prepared.

Further, since the recording medium for an OHP sheet by the impact printer of the present invention is a form in which a transparent sheet material used as an OHP sheet is protected by a top sheet material after drawing, the head of the impact printer at the time of drawing, which was a problem in the past, was used. It is possible to prevent scratches on the ink receiving layer due to the transfer or feed scratches due to the movement of the sheet, and scratches due to contact with fingers or nails during handling or contact with office supplies.

Therefore, when the transparent sheet material is projected on the OHP screen, a clear image without scratches can be obtained.

In addition, as described above, in order to prevent the occurrence of scratches in the impact printer, it is necessary to apply OHP continuously to cut sheet feeders used elsewhere in the impact printer in addition to manually setting and printing one sheet at a time. Since a sheet can be manufactured and ink is not present on the screen of the transparent sheet material, there is no ink removed even when the image is transferred to another sheet immediately after drawing or rubbed with a finger.

Further, conventionally, depending on the type of the impact printer, the recording material for the OHP sheet may not be able to be formed with a single-sheet transparent sheet material because it cannot be detected by a paper sensor. However, the OHP sheet recording medium of the present invention can use an opaque sheet material as the surface sheet material, so that it can be detected as paper by the above-described impact printer and can be printed.

Claims (4)

(57) [Claims] 1. A method of manufacturing an overhead projector sheet by an impact printer, wherein a recording medium in which a top sheet material and a transparent sheet material are polymerized is hit from above the top sheet material by an impact printer. 2. The impact printer according to claim 1, wherein the transparent sheet material is formed by forming a transparent and softer coating layer on the surface of the transparent substrate facing the surface sheet material. How to make an overhead projector sheet. 3. The transparent sheet material is formed in a polymerized state, and a transparent and softer film layer than the substrate is formed on a surface of the transparent sheet material facing the surface sheet material. A recording medium for an overhead projector sheet by an impact printer, characterized by the following. 4. The recording material for an overhead projector sheet by an impact printer according to claim 3, wherein the surface sheet material is paper, synthetic paper, nonwoven fabric, or plastic sheet.