JPH08175090A - Matte film for drawing - Google Patents

Abstract

PURPOSE: To allow manufacture by a water coating liquid, reduce stains resulting from the rubbing of pencil drawing lines, and give effective differences in the density of drawn lines by pencil hardness. CONSTITUTION: A matting agent which contributes to the improvement of the writing characteristics of a pencil uses a blend of two or more types of resin particles which have different average particle sizes out of one or more types of known inorganic and organic resin grains including alumina and polystyrene. Stains resulting from rubbing of pencil drawings using one or more types of matting agent of different average particle sizes are reduced. The drying speed of a solvent is influenced by the superficial shape of a coating film. The foregoing matte layer coating liquid is applied to a plastic film by a known coating method and dried. An antistatic agent can be added to the matte layer if necessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a matting film for drafting, which can be manufactured by an aqueous coating solution,
Further, the present invention relates to a matting film for drafting which is excellent in pencil writing performance.

[0002]

2. Description of the Related Art Most of the matting films for drawing on the market at present are manufactured by using an organic solvent (toluene, methyl ethyl ketone, butyl acetate, etc.) coating solution. However, in recent years, environmental pollution due to organic solvents has become a problem, and it is desired to replace organic solvents such as toluene with water or alcohol.

On the other hand, recently, the matte film for drafting has been increasingly used in a mechanical and non-artificial work environment such as drawing by a high-speed multi-pen plotter by a signal input from a CPU, but drafting There is still a great deal of manual work on the desk by architects, surveyors, and other draftsmen. Drawing with a pencil in such an artificial drafting work
This is a work that is carried out on a daily basis, as is the case with water-based and oil-based ink pens.

Lines drawn by a pencil on a drafting matte film are rubbed by a worker's hand, arm, clothes worn, etc. in a drafting operation performed by a human, and then drawn. It will leave stains and dark spots on the uncovered areas. Not only does the matte film for drawings with dirt and darkness have a poor appearance,
In the next step, it may become the original of the second original drawing such as PPC and diazo copy, and at that time, stains and darkening on the non-drawn portion of the matte film for drafting are
This will have an adverse effect on the original drawing such as dirt. For these reasons, a matting film for drafting is desired which is less contaminated by rubbing such as pencil drawing lines.

On the other hand, for the pencil used in the matte film for drafting, a pencil lead having a hardness of 6B to 8H (including a lead of a mechanical pencil) is used.

When a drawing creator such as a architect or surveyor draws a line, the lines inside and outside of a building or structure, or the drawing lines such as a near view and a distant view or a character are distinguished. In addition to the use, the density is also distinguished by the density of the drawing line. The density of the drawing line is distinguished depending on the hardness of the pencil.

When the drawn matte film for drafting is used as the original for the second original drawing of the diazo copy, each draft of the drawing lines is drawn even though the drafting creator gives intention to each density of each drawing line. If the density difference is small, the intention of each drawing line on the drawing does not appear in the second original drawing by diazo copy. On the contrary, if the density difference between the lines is large, the intention of each line is
It appears in the second original drawing of the diazo copy. Under such circumstances, there is a demand for a matting film for drafting in which, when drawn on a drawing matte film with a pencil, an effective difference appears in the image density of each image line drawn by each pencil hardness.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems, and can be produced by an aqueous coating liquid, and further, contamination by rubbing of pencil drawing lines can be reduced, The purpose of the present invention is to obtain a matting film for drafting in which an effective difference is found in the image density of each image line drawn by each pencil hardness when drawing by.

[0009]

Means for Solving the Problems The present invention provides a mat film for drafting in which a plastic layer is coated with a mat layer coating liquid comprising a binder resin, water and / or alcohol and a matting agent on at least one surface of the plastic film. The above object was achieved by mixing and using matting agents having different average particle sizes as the matting agent.

The present invention will be described in detail below.

The plastic film used in the present invention includes polyester film, polycarbonate film, acrylic resin film, vinyl chloride resin film,
Various materials such as polypropylene film, polyethylene film, polyamide film, nylon film, polyethylene naphthalate film, triacetyl cellulose film can be used, but when used for the 2nd original drawing, dimensional stability and transparency are required. Therefore, a polyester film is particularly suitable.

Next, the mat layer to be laminated on the plastic film is formed by applying a mat layer coating solution containing at least a binder resin, water and / or alcohol and a matting agent. In applying the mat layer coating liquid, it is possible to previously subject the surface of the plastic film to easy adhesion treatment.

The binder resin used in the present invention is a water-soluble or water-dispersible resin because it is coated with an aqueous coating solution.

Such resins include natural ones, synthetic ones, emulsions and dispersions. Examples of natural water-soluble resins include gelatin, protein, casein, chitosan, and cellulose resin.
As synthetic materials, acrylic, epoxy, polyamide, nylon, polyvinyl alcohol, hydroxyethyl cellulose, polyester, melamine, formalin,
Examples include polyvinylpyrrolidone, polyethylene oxide, polyvinyl acetal, urethane, alkyd, polyallylamine, and polyamine sulfone. Examples of emulsions and dispersions include acrylic, vinyl chloride, vinyl acetate, urethane, styrene-butadiene, acrylonitrile-butadiene, polyester, and vinyl acetate-ethylene.

Next, water and alcohol are used as essential solvents for coating. Originally, it is desirable to apply water alone in view of the problem of environmental pollution due to the organic solvent, but it is preferable to use alcohol in combination from the viewpoint of improving the drying / curing reaction rate. Examples of alcohols include methyl alcohol, ethyl alcohol, isopropyl alcohol and butyl alcohol.

The matting agent which particularly contributes to the improvement of the pencil writability in the present invention is alumina, silica, titanium dioxide, talc, calcium carbonate, barium sulfate, zirconium oxide, clay, aluminum stearate, calcium stearate, Among known inorganic and organic resin particles such as zinc stearate, styrene resin, acrylic resin, and silicone resin, one or two or more kinds of particles having different average particle diameters are mixed and used. As described above, when two or more kinds of matting agents having different average particle diameters are used in combination, contamination due to rubbing of pencil drawing lines is reduced, and a remarkable difference occurs in the drawing line density of each drawing line due to each pencil hardness. Such an effect is particularly remarkable when two or more kinds of silica having different average particle diameters are used as the matting agent.

The average particle size of the two matting agents used in the present invention is 1 μm to 1 of the average particle size of the primary particles.
0 μm relatively large particles and average particle diameter of primary particles 1 n
It is preferable to combine two kinds of matting agents having fine particles of m to 100 nm. As a mixing ratio of these, relatively large particles 1 having an average particle diameter of primary particles of 1 μm to 10 μm are used.
The average particle diameter of the primary particles is 1 nm to 10 parts by weight with respect to 00 parts by weight.
When the fine particles of 0 nm are mixed in an amount of about 5 to 20% by weight, the contamination due to the rubbing of the above-mentioned pencil drawing lines is reduced, and the difference in the drawing line density due to each pencil hardness becomes more remarkable.

Such a matting agent having two or more kinds of average particle diameters is combined with the above-mentioned water-soluble or water-dispersible resin to reduce contamination due to rubbing of pencil drawing lines and a remarkable difference in image line density. Such effects cannot be produced by using a conventional resin soluble in an organic solvent such as toluene, methyl ethyl ketone, or butyl acetate. The reason for this is not clear, but it is considered that the drying rate of the solvent affects the surface shape of the coating film.

The above matte layer coating liquid is coated on a plastic film by a known coating method and then dried.

If necessary, an antistatic agent or the like can be mixed in the above mat layer, or an antistatic layer can be provided on the mat layer within a range that does not impair the performance such as the surface condition of the mat layer. .

[0021]

【Example】

(Example 1) A polyethylene terephthalate film (Lumirror S14, 50 μm, manufactured by Toray Industries, Inc.) was subjected to corona discharge treatment on one side, and then the following matte layer coating solution was applied to the corona discharge treated side with a Meyer bar and dried. (60 ° C., 48 hours) to obtain a drafting matte film having a matte layer with a thickness of 5 μm.

Matt layer coating liquid-Acrylic resin: Solid content 31% 28 parts (Ricabond SA-Z113: Chuo Rika Kogyo Co., Ltd.)-Epoxy resin: Solid content 98% 6 parts (Ricabond EX-8S: Chuo Rika Kogyo Co., Ltd.) Made) ・ Porous silica (average particle size 3.0 μm) 5 parts (Sylysia 730: made by Fuji Silysia Chemical Ltd.) ・ Fine powder silica (average primary particle size 12 nm) 0.5 part (Aerosil R974: made by Nippon Aerosil Co., Ltd.)・ Isopropyl alcohol 8 parts ・ Water 52 parts

Table 1 shows the results obtained by measuring the pencil writability, diazo copy suitability, and coating liquid of the obtained matte film for drafting.

Example 2 A polyethylene terephthalate film (Lumirror S14, 50 μm, manufactured by Toray Industries, Inc.) was subjected to corona discharge treatment on one surface thereof, and then the following matte layer coating solution was applied to the corona discharge treated surface with a Meyer bar. Engineering, drying (6
At 0 ° C. for 48 hours), a matte film for drafting having a matte layer with a thickness of 5 μm was obtained.

Matt layer coating liquid-Acrylic resin: Solid content 46% 20 parts (Nicazole RX-66P: manufactured by Nippon Carbide Co.)-Melamine formalin resin: Solid content 80% 13 parts (Sumitex Resin M-3: Sumitomo Chemical) Kogyo Co., Ltd.-Melamine formalin curing catalyst 1 part (Sumitex Accelerator ACX: Sumitomo Chemical Co., Ltd.)-Porous silica (average particle size 3.0 μm) 10 parts (Sylysia 730: Fuji Silysia Chemical Co., Ltd.)-Fine Powder silica (average primary particle size 12 nm) 1 part (Aerosil R974: manufactured by Nippon Aerosil Co., Ltd.) ・ Isopropyl alcohol 6 parts ・ Water 50 parts

Table 1 shows the results of measuring the pencil writability, diazo copy suitability, and coating liquid of the obtained matte film for drafting.

Example 3 A polyethylene terephthalate film (Lumirror S14, 50 μm, manufactured by Toray Industries, Inc.) was subjected to corona discharge treatment on one surface thereof, and then the following matte layer coating solution was applied to the corona discharge treated surface with a Meyer bar. Engineering, drying (6
At 0 ° C. for 48 hours), a matte film for drafting having a matte layer with a thickness of 5 μm was obtained.

Matt layer coating liquid-Acrylic resin: solid content 31% 28 parts (Ricabond SA-Z113: Chuo Rika Kogyo Co., Ltd.)-Epoxy resin: solid content 98% 6 parts (Ricabond EX-8S: Chuo Rika Kogyo Co., Ltd.) Made) ・ Porous silica (average particle size 3.0 μm) 4.4 parts (Sylysia 730: made by Fuji Silysia Chemical Ltd.) ・ Fine powder silica (average primary particle size 12 nm) 1.1 parts (Aerosil R974: Nippon Aerosil Co., Ltd.)・ Made of isopropyl alcohol 8 parts ・ Water 52 parts

Table 1 shows the results obtained by measuring the pencil writability, diazo copy suitability, and coating liquid of the obtained matte film for drafting.

Comparative Example 1 A polyethylene terephthalate film (Lumirror S14, 50 μm, manufactured by Toray Industries, Inc.) was subjected to corona discharge treatment on one surface thereof, and then the following matte layer coating solution was applied to the corona discharge treated surface with a Meyer bar. Engineering, drying (6
At 0 ° C. for 48 hours), a matte film for drafting having a matte layer with a thickness of 5 μm was obtained.

Matt layer coating liquid-Acrylic resin: Solid content 31% 28 parts (Ricabond SA-Z113: Chuo Rika Kogyo Co., Ltd.)-Epoxy resin: Solid content 98% 6 parts (Ricabond EX-8S: Chuo Rika Kogyo Co., Ltd.) Porous silica (average particle diameter 3.0 μm) 5.5 parts (Sylysia 730: manufactured by Fuji Silysia Chemical Ltd.) Isopropyl alcohol 8 parts Water 52 parts

Table 1 shows the results obtained by measuring the pencil writability, diazo copy suitability, and coating liquid of the obtained matte film for drafting.

Comparative Example 2 A polyethylene terephthalate film (Lumirror S14, 50 μm, manufactured by Toray Industries, Inc.) was subjected to corona discharge treatment on one side, and then the following matte layer coating solution was applied to the corona discharge treated surface with a Meyer bar. Engineering, drying (6
At 0 ° C. for 48 hours), a matte film for drafting having a matte layer with a thickness of 5 μm was obtained.

Matt layer coating liquid-Acrylic resin: Solid content 50% 25 parts (Acridic A804: Dainippon Ink & Chemicals Co., Ltd.)-Isocyanate prepolymer: Solid content 60% 8 parts (Takenate D110N: Takeda Pharmaceutical Co., Ltd.) Made) ・ Porous silica (average particle size 3.0 μm) 5 parts (Sylysia 730: made by Fuji Silysia Chemical Ltd.) ・ Fine powder silica (average primary particle size 12 nm) 0.5 part (Aerosil R974: made by Nippon Aerosil Co., Ltd.)・ Methyl ethyl ketone 20 parts ・ Toluene 20 parts ・ Butyl acetate 20 parts

The solvent resistance, water resistance, pencil writability, ink suitability, diazo copy suitability, measurement of the coating liquid, etc. of the obtained matting film for drawing were measured and the results are shown in Table 1.

[0036]

[Table 1]

Pencil Writability Density: HB, 2H, 4H pencil cores are used to draw a line with a constant load, and the density of the image line due to each pencil hardness is measured by a microdensitometer (without filter: Sakura Microdensitometer PDM). It was measured in -5). The difference between the HB concentration and the 4H concentration thus measured was defined as the concentration difference.

Contamination resistance: A line is written with a constant load using a pencil lead of 2H, and the line is rubbed with a cotton cloth under a constant load and rubbed, and the degree of contamination of a portion not drawn is visually observed. evaluated.

Diazo copy suitability: HB, 2 on film
A line drawn by applying a constant load with a pencil lead of H, 4H was used as a document, and the difference in image density between the second original images by each diazo copy was visually evaluated.

Solvent: The type of solvent used in the coating liquid.

Distinction of coating liquid: Distinction of whether the coating liquid corresponds to a dangerous substance.

Odor: The presence or absence of the odor of an organic solvent during the coating process was subjectively judged.

The weight ratio of the porous silica and the fine powder silica of Examples 1 and 2 was 100: 10, and the weight ratio of Example 3 was 100: 25. In Comparative Example 1, fine powder silica was not mixed. Even with the ratios of Example 3, the effects such as the density difference of the pencil writing line and stain resistance are exhibited, but the ratios of Examples 1 and 2 exhibit those effects most favorably. I understand. It can be considered that this is because the surface state of the coating film was changed by mixing an appropriate amount of finely divided silica, which had a favorable effect on the pencil writability. On the other hand, in Comparative Example 1, the difference in the density of the pencil writing lines
It can be seen that it is inferior in terms of stain resistance.

Further, the ink compositions of Examples 1 and 2 have good writability in comparison with the organic solvent composition of Comparative Example 2 even though they have the same pigment formulation. In Comparative Example 2, it can be considered that since the solvent of the coating liquid is an organic solvent, abrupt solvent evaporation occurs when the coating film is dried and the surface state of the coating film is roughened. The coating films of the examples are mostly effective from the environmental and practical viewpoints because most of the solvent is water and the pencil writability is good by using two kinds of silica.

[0045]

According to the present invention, since an aqueous coating liquid which does not use toluene, methyl ethyl ketone, butyl acetate, etc. is applied, it is safe from the viewpoint of hygiene and the influence of environmental pollution due to other factors is extremely small.

Furthermore, the combination of an aqueous resin and a specific matting agent reduces contamination on the matting film for drafting due to rubbing of pencil drawing lines, and is effective for the drawing line density of each drawing line drawn with each pencil hardness. Make a difference.

Claims (4)

[Claims] 1. A matting film for drafting in which a matting layer coating liquid comprising a binder resin, water and / or alcohol and a matting agent is coated on at least one side of a plastic film, wherein the matting agent has an average particle size of A matting film for drafting, characterized by using different matting agents in combination. 2. The matting agent according to claim 1, wherein at least two matting agents having a mean particle size of 2.0 μm to 6.0 μm and a matting agent having a mean particle size of 5 nm to 20 nm are mixed. A matte film for drafting characterized by being used. 3. A matting film for drafting, wherein the matting agent according to claim 1 is two kinds of silica having different average particle sizes. 4. The matte film for drafting according to claim 1, wherein the surface of the plastic film is subjected to an easy-adhesion treatment and then the matte layer coating liquid is applied.