JPH0413148B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a film that can be printed and recorded with various printers, for example, as various cards, slips, and labels. [Conventional technology] Various cards, slips, labels, etc. are printed with frame patterns, ruled lines, product names, own addresses, company names, etc. on the surface of plastic film or paper in advance, and lot numbers are added as necessary. , date of manufacture, barcode, and other individual information. Recently, wired printers, thermal transfer printers, and inkjet printers are often used as output means for word processors and personal computers to record this information. Therefore, it is necessary that the recording medium, such as plastic film or paper, be easy to print on and at the same time easy to record with these printers. In general, paper has good printability and is compatible with various printers, but it cannot be used for applications that require water resistance, strength, transparency, etc. Plastic film is superior in this respect, but it is difficult to print on, and some printers may not be able to record on it. Among printing types, gravure printing, flexogravure printing, screen printing, etc. are relatively easy to print, but these types of printing require high plate making costs, poor workability, poor gradation of printed images, and poor image quality. There were some drawbacks, such as the fact that the images tend to become unclear. On the other hand, offset printing costs less and can be easily performed, and the image has good gradation and clarity. Although it is preferable to be able to print on plastic film by offset printing, printing on plastic film is difficult in offset printing using ordinary ink because the drying and curing of the ink is extremely slow. In order to make it easier to print on plastic film, some plastic films have a modified microporous layer formed on the surface of the film to make it absorbent for ink. [Problems to be solved by the invention] However, recently, there has been a wide variety of recording methods such as printing, and the conventional plastic film with a modified layer formed on the surface can be used for many recording methods. There isn't. Examples of recording means include the various types of printing mentioned above including offset printing, printing by a wire dot printer, printing by a thermal transfer printer, and the like. The present invention has been made in view of the above, and is a film that can be used with many types of recording means, and at the same time has the scratch resistance and scratch resistance that are generally required for recording films.
The aim is to provide a film that is also excellent in stain resistance, slipperiness, etc. [Means for Solving the Problems] In order to solve the problems, the recording film of the present invention has a plastic film mainly containing a carboxylated styrene-butadiene copolymer resin or (and) a modified alkyd resin on at least one side of the plastic film. An ink fixing layer is provided as a component. The plastic film used as the base material is a base film, such as polyester film, polyolefin film such as polyethylene film or polypropylene film, polycarbonate film, triacetate film, polyether sulfon (PES) film, polyether ether ketone (PEEK). Film, vinyl chloride film, various acrylic films including methyl methacrylate, and cellophane films. Among these, polyester film, hard vinyl chloride film, polypropylene film or triacetate film are preferred. A plastic film that has been subjected to subbing treatment to improve its adhesion to the ink fixing layer may also be used. The modified alkyd resin constituting part or all of the ink fixing layer is preferably a styrenated alkyd resin or a phenol-modified alkyd resin. The main components of the ink fixing layer are carboxylated styrene-butadiene copolymer resin and modified alkyd resin as described above, but other resin components (such as polyester resin, polyvinyl chloride, etc.) may be used as required for heat resistance, scratch resistance, etc. resin, polyvinyl acetate resin,
(polyvinyl alcohol, cellulose derivative, melamine resin, isocyanate crosslinked resin) may be mixed. Further, in order to improve film running properties during offset printing, a small amount of filler such as silica powder may be mixed in for the purpose of lowering the surface friction coefficient.
Note that if a transparent plastic film is used as the base material, the recording film of the present invention will not lose its transparency. The thickness of the ink fixing layer is 1μm
25 μm or more is unnecessary. It is preferably about 5 to 10 μm [Function] The recording film of the present invention has the above-mentioned ink fixing layer on the surface, and has good adhesion (wetting), absorbency, and dry curing property of printing ink. . For example, in offset printing ink, it is thought that the drying oil undergoes oxidative polymerization while the solvent component in the vehicle is absorbed or evaporated, and it takes time for the oxidative polymerization to be completed and the ink to dry and harden. The ink is strongly held in the ink fixing layer on the film surface, and the solvent component is absorbed by the ink fixing layer, increasing the ink's viscosity sufficiently, so the ink sets quickly and drying hardens due to oxidative polymerization of the drying oil. Even if incomplete films are stacked, they will not get dirty. Easy to print with wired printers, thermal transfer printers, and write with oil-based pens. For example, the ink components of a wired printer's ink ribbon are color vehicles (non-drying oils, mineral oils, higher fatty acids, high boiling point hydrocarbons), colorants (pigments, dyes), etc.
and a surfactant to prevent the ink from drying on the ribbon. Therefore, dry curing by oxidative polymerization cannot be expected, and permeation drying is performed. The ink fixing layer of the recording film of the present invention has a function of well absorbing and fixing the above-mentioned ink components of wire dot printers. A thermal transfer printer transfers heat-melting ink coated on a film of about 2 to 6 μm onto recording paper while melting it with a thermal head. It has the effect of improving the adhesion with the above-mentioned hot-melt ink. [Example] Hereinafter, typical examples of the present invention will be described. Note that the comparative example is an example to which the present invention is not applicable. Example 1 A mixture of carboxylated styrene-butadiene copolymer latex and water-soluble polyester resin (solids ratio 6:
4) A water-based paint (solid content 30% by weight) is applied and dried in a drying oven at 120°C for 2 minutes. On the obtained film, an ink fixing layer of 7 .mu.m thick consisting of a carboxylated styrene-butadiene copolymer and a water-soluble polyester resin in a weight ratio of 6:4 was formed. Example 2 A solution having the following formulation is applied onto one side of a 125 μm thick transparent triacetate film using a reverse roll coater. Styrene-modified alkyd resin (Maropol 890,
Solid content: 60%, manufactured by Nippon Shokubai Chemical Co., Ltd.) 50 parts by weight Synthetic silica (Syroid 74, manufactured by Fuji Davison Chemical Co., Ltd.)
Co., Ltd.) 0.9 parts by weight Toluene 40 parts by weight Xylene 10 parts by weight This was dried in a drying oven at 130° C. for 2 minutes to form an ink fixing layer with a thickness of 10 μm on one side. Example 3 A 2 μm thick coating layer of saturated polyester resin (Vylon 200, manufactured by Toyobo Co., Ltd.) was applied on one side of a 100 μm thick white polyester film (Dial Foil W200, manufactured by Diafoil Co., Ltd.). After installation and easy adhesion processing, a solution with the following formulation is applied. Phenol-modified marquid resin (P-27, solid content
50%, manufactured by Dainippon Ink & Chemicals Co., Ltd.) 40 parts by weight Nitrocellulose resin 9 parts by weight Toluene 26 parts by weight Butyl acetate 25 parts by weight This was dried in a drying oven at 130°C for 2 minutes, and one side was coated with a thickness of 18 μm. An ink fixing layer was formed. Comparative Example 1 A 15% solids solution of vinyl chloride-vinyl acetate copolymer dissolved in a mixed solvent of methyl ethyl ketone and toluene was coated on one side of a 100 μm thick transparent polyester film using a reverse roll coater and dried with air. . An 8 μm layer of vinyl chloride-vinyl acetate copolymer was formed on the film. Comparative Example 2 A paint having the following composition is applied to one side of a 125 μm thick transparent triacetate film. Nitrocellulose resin 20 parts by weight Synthetic silica (Thyroid 74) 0.6 parts by weight Ethyl alcohol 40 parts by weight Toluene 30 parts by weight Butyl acetate 10 parts by weight This was dried for 2 minutes in a drying oven at 120°C until the thickness
A coating layer of 12 μm was formed. Comparative Example 3 A 100 μm thick white polyester film (same as the base film used in Example 3) was left unprocessed. The six types of films of Examples 1 to 3 and Comparative Examples 1 to 3 are cut into predetermined sizes to form sheet films. The sheet-fed film is then run on an offset printing machine using drying oil type ink to actually print in multiple colors. In addition, printing was performed using a wire dot printer and a thermal transfer printer, and the suitability of each was evaluated. The transparency (total light transmittance, haze degree, JIS K 6714) of each film was measured, and the scratch resistance, stain resistance, heat blocking resistance, and slipperiness of the ink fixing layer were also evaluated.

【table】

〔Effect of the invention〕

As explained above, the recording film to which the present invention is applied can be used for various types of printing, wired printers,
It has good absorbency and fixability for printing by various printers such as thermal transfer printers. Furthermore, it satisfies general properties as a recording film, such as scratch resistance, stain resistance, heat blocking resistance, and slipperiness. Printed matter using the film of the present invention can be beautifully finished and has excellent printing strength after printing. Therefore, the recording film of the present invention can be used in various applications such as various cards, slips, and labels, and the respective characteristics can be fully exhibited.

Claims (1)

[Claims] 1. On at least one side of the plastic film,
1. A recording film comprising an ink fixing layer containing a carboxylated styrene-butadiene copolymer resin and/or a modified alkyd resin as a main component. 2. The recording film according to claim 1, wherein the modified alkyd resin is a styrenated alkyd resin. 3. The recording film according to claim 1, wherein the modified alkyd resin is a phenol-modified alkyd resin.