JP3206663B2 - Ink absorbent matte film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing film and a recording material for various printers, and more particularly to an ink-absorbing mat film.

[0002]

2. Description of the Related Art Conventionally, various types of printers employ an impact-type recording method, a recording method using a pen plotter using a water-based pen and a hollow pen for black drawing, or an electrophotographic recording method such as Xerox. is there.
A typical impact-type recording method is a wire dot printer, in which an ink ribbon absorbing non-dry ink is placed on a recording material, and the wire strikes from the ribbon side, and the ink in the ribbon is applied to the recording material. This is a method in which the print is made by adhering to the print. When the recording material is paper, the ink is absorbed into the paper fibers and dries immediately.However, in the case of a plastic film such as a transparent film or a matting film for drafting, the ink is hardly absorbed, and thus, the ink is transferred. The ink remains in a liquid state on the film without drying forever.
As a result, the characters become dirty and unreadable due to handling.

Similarly, when recording with an aqueous pen by a pen plotter, the recording material is good when the recording material is paper, but cannot be used in the same manner as described above when the recording material such as a plastic film does not absorb water. As an improvement on these points, coating a resin layer containing a large amount of pigment on the film surface,
There is a film with improved ink absorption, for example, peach coat (trade name, manufactured by Nisshinbo Co., Ltd.). However, since this type of film is coated with a resin layer containing a large amount of pigment and having a thickness of about 20 μm, the ink absorbing property is good but the concealing property is extremely high, and the film is copied on diazo photosensitive paper or the like. Cannot be used as a transmitted light original.

[0004] A drafting film, Clonaflex UC tracing film (trade name, manufactured by DuPont), which is made of a water-based resin such as polyvinyl alcohol or gelatin as a binder to increase the absorbability of water-based ink and can be used as a transmitted light manuscript. Etc. This is disadvantageous in that the absorption of oily non-drying ink such as a dot printer or a typewriter is poor, so that it cannot be used for the impact type recording system, and that the vermilion mark is poorly dried.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and it has good absorbability and dryness regardless of whether it is water-based or oil-based, and can be used as a transmitted light original. It is an object of the present invention to provide a mat film having:

[0006]

In order to achieve the object described above SUMMARY OF THE INVENTION The ink absorbent mat film of the present invention includes a water-resistant anchor coat layer on a transparent <br/> plastic film, Po
Liacrylate esters and / or polyester resins
Formed by sequentially laminating a matte layer composed of a water-dispersible resin and pigment as a main component substantially transparent ink absorbency map
A Tofirumu, the weight ratio of the resin and the pigment of the mat layer is 100: 40 to 100: 400, the film thickness is 1 to 5 [mu] m.

[0007] The ink-absorbing mat film described above improves the adhesion to a plastic film as a support when a mat layer having a high pigment content, which absorbs both aqueous and oil-based inks, is applied. For this purpose, an anchor coat layer is provided, and the mat layer having a high pigment content is formed to be an extreme layer in order to maintain translucency.

Each layer of the above-mentioned ink-absorbing mat film will be described. The plastic film which is the support of the ink-absorbing mat film can be used as long as it is a film having good transparency, and it is possible to use polyester, polycarbonate, cellulose acetate, polyimide, polysulfone, polyvinyl chloride, polyethylene, polystyrene, polypropylene and the like. it can. Generally, the thickness of the film is suitably in the range of 6 to 500 μm.

The anchor coat layer has good adhesion and water resistance to the plastic film and the mat layer, and the resin used for the anchor coat layer is polyester, polyurethane, polyacrylate, polyvinyl chloride. A vinylidene chloride copolymer or the like can be used alone or as a mixture. The thickness of the anchor coat layer is a thickness that can secure the adhesion between the plastic film and the mat layer, and is suitably about 0.5 to 2 μm.

[0010] The mat layer is formed of a mixture of an aqueous dispersion resin and a pigment. The water-dispersed resin is an emulsion or dispersion of a resin insoluble in water.
Since the anchor coat layer is soluble in an organic solvent, the anchor coat layer is dissolved when coated on the anchor coat layer, and the mat layer is coated so that a desired mat layer cannot be obtained. It is preferable that the liquid does not use an organic solvent, and it is preferable that the mat layer is not water-soluble so as not to cause inconvenience such as handling of the film as a product with a sweaty hand and the trailing of fingers. Therefore, a water-dispersed resin that is neither water-soluble nor an organic solvent is used for the mat layer. As the water-dispersed resin, an emulsion or dispersion of a polyacrylate or polyester resin can be used alone or as a mixture.
When a small amount of a water-soluble resin such as polyacrylic acid or polyvinyl alcohol is added to the above resin, the coatability is improved and a good mat layer can be obtained.

In addition, the stability of the coating solution of the water-dispersed resin may be impaired depending on its pH. Therefore, the resin can be adjusted to a desired pH by a suitable pH adjuster and stabilized.
Alcohols may be added to improve the wettability during coating. As the pigment contained in the mat layer, any general extender pigment can be used, and for example, clay, talc, calcium carbonate, silica and the like may be used.

The mixing ratio of the water-dispersed resin and the pigment in the mat layer is appropriately determined because the molecular weight and the oil absorption vary depending on the type of the resin and the pigment used.
It is preferably in the range of 0:40 to 100: 400. If the pigment ratio is lower than 100: 40, the ink absorbency is significantly reduced and drying is poor. On the other hand, if the pigment ratio is higher than 100: 400, the resin ratio is reduced, so that the strength of the coating film is weakened and the film is easily peeled off with a nail or the like. The thickness of the mat layer is required to be extremely thin in order to obtain a substantially transparent film, and is preferably 1 μm or more and 5 μm or less. When the thickness is 5 μm or more, transparency is impaired, and when it is 1 μm or less, a mat film having poor ink absorption is obtained.

It is also possible to apply a pressure-sensitive adhesive layer to the back surface of the above-described ink-absorbing mat film, bond a release paper (or release film), and produce a mat film for cutting and pasting. This can be performed by printing on a mat surface by a dot printer, a typewriter, an electrostatic recording method, a water-based pen recording method, or the like, cutting out only a necessary printing portion, and pasting the object to be bonded. Further, by producing an ink-absorbing mat film using a plastic envelope or the like as a support, a plastic envelope or the like capable of recording by various recording methods can be obtained.

[0014]

The present invention will be described below with reference to examples and comparative examples. Example 1 A 50 μm-thick polyethylene terephthalate film (Lumirror, manufactured by Toray Industries, Inc.) was used as a base material. A coating solution having the following composition was dried on this film to form an anchor.
Bar coating was performed so that the coating layer became 1 μm and the mat layer became 3 μm.
Coating by the tar method. The coating liquid is sequentially charged and adjusted by stirring. Drying after coating was performed at 100 ° C. for 2 minutes. Hereinafter, parts in the composition are based on weight. Coating solution composition Anchor coat layer Vinylidene chloride copolymer (Crehalon S0A, manufactured by Kureha Chemical Industry Co., Ltd.) 1 part Methyl ethyl ketone 1 part Toluene 2 parts Mat layer water 47 parts Silica fine powder (Syloid 978, Fuji Devison) 3 parts Polyester resin 34 wt%, water dispersion (Vylonal MD-1200, manufactured by Toyobo Co., Ltd.) 7 parts Acrylic ester copolymer 30 wt%, water emulsion (Sebian A46704, Daicel Chemical Industries) 8 parts Ethanol 9 parts Comparative Example 1 A polyethylene terephthalate film 50 μm was matted by a sandblast method to obtain a film (Diamat, manufactured by Kimoto Co., Ltd.). Comparative Example 2 A coating solution having the following composition was applied to a 50 μm thick polyethylene terephthalate film by a bar coater method so that the film thickness after drying was 20 μm, and dried at 100 ° C. for 2 minutes. To obtain a film.

Composition of coating liquid Polyester resin pellets (Vylon 200, manufactured by Toyobo Co., Ltd.) 6.4 parts Calcium carbonate (Sunlight SL700, manufactured by Takehara Chemical Industry Co., Ltd.) 20.4 parts Methyl ethyl ketone 20 parts Toluene 30 parts Above The three types of films of Example and Comparative Examples 1 and 2 were used in the following 6
Recording was performed using various recording methods, and images were evaluated.

First, a wire dot printer (JK-120)
5. Printing was performed by Matsushita Communication Industrial Co., Ltd.), and one minute later, the printed portion was rubbed with a finger to evaluate fixability and character density. Copy samples were prepared by an electrophotographic recording method (Xerox 4790, manufactured by Fuji Xerox Co., Ltd.), and the density, sharpness and adhesiveness of the toner image were evaluated. The aqueous pen was drawn with an attached aqueous fiber pen using a pen plotter (XY plotter FP5301 manufactured by Graphtec Co., Ltd.), and the image fixability and character density were evaluated. For black drawing, use a pen plotter (same as above) with a hollow pen (757P
Ink for drawing (748P)
LF (manufactured by Stedler Co., Ltd.) to evaluate the image adhesion and the character density. Regarding the dryness of the stamped characters, stamp the stamped characters with Bunka Zushi (manufactured by Maruyama Industry Co., Ltd.).
After a minute, the degree of drying of the letters rubbed with a finger was evaluated. For oil-based pen writing, Mitsubishi Marker (Mitsubishi Pencil Co., Ltd.)
, And writability (without bleeding, blurring, etc.) was evaluated. As a physical property, transparency is measured by a haze meter (SM).
-4, HGM2K Suga Test Instruments Co., Ltd.) to measure and evaluate the total light transmittance and haze. Regarding the surface strength, the extent to which the film surface was rubbed with a nail and the coating layer was scraped or the mat layer was crushed, and the extent to which the mat layer was damaged by bending was evaluated.

Table 1 shows the results.

[0018]

[Table 1]

As described above, in the recording material of the present invention, as shown in Table 1, an impact recording system, an electrophotographic recording system, an aqueous pen recording system, and ink drawing using a hollow pen, stamping, and oil-based pen writing. , A good recorded image is obtained, and good transparency and surface strength are obtained. This is an unprecedented type of recording material,
It is practically useful.

[0020]

As is clear from the above description, since the ink-absorbing mat film of the present invention has an anchor coat layer, the adhesion between the plastic film as a support and the mat layer is good, and the mat layer has a binder. A water-dispersed resin is used, and a relatively large amount of pigment is mixed with the resin. Therefore, ink absorption is good regardless of water-based or oil-based properties, and since it is not water-soluble, it is difficult to handle fingerprints. Thus, an excellent mat film having translucency can be obtained. As a result, high-quality and clear images can be formed in any of the recording methods such as the impact recording method, the pen plotter method using an aqueous pen, and the electrophotographic recording method. It is also ideal as a manuscript.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-276670 (JP, A) JP-A-50-136363 (JP, A) JP-A-4-201286 (JP, A) JP-A-63-1988 178074 (JP, A) JP-A-1-156336 (JP, A) JP-A-48-71430 (JP, A) JP-A-50-136363 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) B41M 5/00 B32B 27/30 B32B 27/36 101 G03G 7/00

Claims (2)

(57) [Claims] 1. A transparent plastic film comprising a water-resistant anchor coat layer and a mat layer made of a water-dispersed resin and a pigment mainly composed of a polyacrylate and / or polyester resin, which are successively laminated. A substantially transparent ink-absorbing mat film, wherein the weight ratio of the resin and the pigment in the mat layer is 100: 40 to 100: 4.
A water-based and oil-based ink-absorbing mat film having a thickness of 1 to 5 μm. 2. A substantially plastic laminate comprising a water-resistant anchor coat layer and a mat layer made of a water-dispersed resin mainly composed of a polyacrylate and a polyester resin and a pigment sequentially laminated on a transparent plastic film. And a weight ratio of the resin and the pigment of the mat layer is 100: 40 to 100: 400, and the film thickness thereof is 1 to 5 μm. Matte film.