JPH0412846A - Printed molding - Google Patents

Abstract

PURPOSE:To enhance printing work efficiency by accelerating the setting of ink and to provide a high gloss molding having good friction resistance useful for various packing materials of daily necessaries by applying a coating solution containing a specific substance as a main component to the single surface of a base material to provide an ink fixing layer and applying printing layer to form transparent printing paper and molding said paper into an appropriate shape. CONSTITUTION:In the constitution of a transparent molding, a coating solution based on an emulsion and colloidal silica is applied to at least the single surface of a base material composed of a moldable transparent plastic film 1 to provide an ink fixing layer 2 and transparent printing paper wherein offset printing or letterpress printing 3 is applied to the ink fixing layer 2 is molded into an appropriate shape. In the constitution of an opaque molding 5, an opaque layer 4 is formed on the printed surface of the transparent printing paper wherein the offset printing or letterpress printing 3 is applied to the ink fixing layer and the coated printing paper is molded into an appropriate shape so that the non-printed surface is turned upside. As a printing method, there are offset printing, gravure printing, flexogravure printing and screen printing. As a molding method, there are a vacuum molding method and a pressure forming method.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention can be used as various packaging materials for toys, stationery, daily necessities, food, medicine, etc. by printing with ordinary drying oil type ink or recording with various printers. This relates to the molded product that is molded after the process.

[Conventional technology]

Generally when forming plastic films.

It is said that if you use a sheet that has been printed or colored in advance, you can create a beautiful colored finish.

Conventionally, when molding after printing on a transparent film, the film is gravure printed and then molded, or the film is offset printed and then molded, and a transparent film is layered on top to protect the printing surface. things were being done.

[Problem to be solved by the invention]

However, gravure printing has problems such as high plate-making costs, poor workability, and problems such as printed images having poor gradation and easily becoming unclear.

In addition, sheet-fed offset printing machines are the mainstream for paper printing, and if plastic films could also be printed using these sheet-fed offset printing machines, it would be extremely convenient and useful. Since the drying and curing of ink is extremely slow, even when using not only ordinary ink but also synthetic paper ink, there is a problem that the ink dries slowly and workability is poor.

On the other hand, in recent years, transparent molded products for packaging have been in increasing demand as packaging materials because they not only allow the contents to be clearly seen, but also have a good display effect in stores, and the transparent film itself It became desirable to have products printed on them and molded for packaging.

The above-mentioned transparent film printed and molded for packaging looks better than conventional transparent molded products for packaging, and can increase the commercial value of the packaged product. After applying reverse printing to the film, an opaque layer is formed on the printed surface and the non-printed side is facing up to be molded for packaging, so the printing is clearly visible because the surface is the base material. Since it has excellent abrasion resistance and high gloss, it gives a more luxurious feel than the above-mentioned products, and is therefore considered to be suitable for packaging luxury goods.

Therefore, the problem to be solved by the present invention is to provide a transparent molded product with printing on the front or back surface, reverse printing the printing, form an opaque layer such as white on the printed surface, and remove the base material. The object of the present invention is to provide a molded article that is molded with the front side facing up for packaging.

[Means to solve the problem]

The present invention was made with the aim of solving the above problems, and the structure of the transparent molded product is such that at least one side of a base material made of a moldable transparent plastic film is
A coating liquid containing emulsion and colloidal silica as main components is applied to provide an ink fixing layer, and a transparent printing paper with offset printing or letterpress printing is formed on the ink fixing layer into an appropriate shape. The structure of the non-transparent molded product is characterized by coating one side of a base material made of a moldable transparent plastic film with a coating liquid containing emulsion and colloidal silica as main components. An ink fixing layer is provided on the ink fixing layer, and an opaque layer is formed on the printed surface of transparent printing paper, which has been reverse printed by offset printing or letterpress printing, and the non-printing side is exposed. It is characterized by being formed into a suitable shape.

That is, the present invention improves ink fixability by modifying the surface of a transparent plastic film with moldability.
In other words, the ink has good adhesion (wetting), absorbency, and dry curing properties, and can be applied to many types of recording means.
It also has excellent scratch resistance, stain resistance, slipperiness, etc. that are generally required for printing paper, and after printing on this film, it can be molded into molded products suitable for packaging, and transparent printing paper. After performing reverse printing, an opaque layer is formed on the printed surface, and this is molded to be suitable for packaging, thereby providing a high-gloss molded product with good abrasion resistance.

Next, the present invention will be explained in detail.

The plastic film as a base material may be thermoplastic and transparent, such as celluloid, cellulose acetate,
Butyl cellulose acetate, ethyl cellulose, vinyl chloride, vinylidene chloride, vinyl acetate, polystyrene, polyethylene, polyester, polypropylene, polyvinyl alcohol, polyvinyl acetal, polyisobutylene,
Examples include polyamide (nylon), polyether, polycarbonate, fluororesin, and saturated polyester resin. Among these, polystyrene, vinyl chloride, polyethylene and polyester films are preferred. The plastic film may be used after being previously treated to improve its adhesion to the ink fixing layer.

Further, the emulsion may be transparent as long as it is transparent when applied to a film.For example, an acrylic, styrene-butadiene, vinyl chloride, or vinyl acetate emulsion may be used.

Polymers and copolymers such as vinyl acetate-ethylene, etc., may be obtained by copolymerizing each of the above polymers with trace components to make them modified, crosslinkable, or self-crosslinkable.

One component that makes up the ink fixing layer is an emulsion. By adding another component, colloidal silica, to this emulsion, the ink setting property is improved. Colloidal silica refers to a colloidal liquid in which minute spherical silica with a particle size of 5 mm to 100 mm is dispersed in water.

Adding this colloidal silica improves heat blocking properties, moist heat blocking properties, and scratch resistance, so when the ink fixing layer is exposed, it is necessary to attach a protective film to the printed surface to protect the surface. do not have.

Furthermore, by utilizing the transparency and performing reverse printing, the ink fixing layer can be placed on the back side. The solid content ratio of emulsion and colloidal silica is 100/40~
It is preferable to set it to 1.00/100.

The amount of colloidal silica added must be within a range that does not impair transparency. By doing so, the ink fixing layer can maintain high gloss without impairing the gloss of the film itself.

In addition, when an opaque layer is provided on the printed surface, white printing, white coating, and opaque film lamination are performed by means such as paper lamination. Printing methods include offset printing, gravure printing, flexogravure printing,
There is screen printing, etc.

Forming methods include vacuum forming and compressed air forming, but in addition to these, if the product has a complex shape and is difficult to form simply with vacuum pressure, other appropriate auxiliary methods may be used. Alternatively, the non-printing surface may be subjected to anti-static or anti-friction processing.

[Action of the invention]

The printed transparent molded product of the present invention has the above-mentioned ink fixing layer on the surface, so printing ink setting properties are improved.
Good ink drying properties and ink fixation properties. In general, ink setting is high speed printing.

This affects efficiency, and even if a slightly beautiful print can be made, the printing speed is slow due to set-off, and economical printing is impossible if the printed matter cannot be stacked. However, in the present invention, The ink is strongly retained by the ink fixing layer on the film surface, and the solvent component in the vehicle is absorbed by the ink fixing layer, increasing the viscosity of the ink sufficiently, so the ink sets quickly and drying hardens by oxidative polymerization of the drying oil. Even if the film is stacked with imperfections, there will be no set-off. Therefore, it is possible to print beautifully using offset printing, letterpress, etc., and it is also possible to improve printing work efficiency.

By mixing colloidal silica into the coating film components constituting the ink fixing layer, the fixing properties of the ink are improved, and by molding after printing, a beautifully printed transparent molded product can be easily obtained.

Furthermore, if you perform reverse printing on transparent printing paper to form an opaque layer on the printed surface and then mold it with the non-printed side facing up, you can create a printed molding with good abrasion resistance and high gloss. products can be obtained easily.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Example 1 Modified acrylic emulsion 30 parts (Movinyl 911, solid content 46%, manufactured by Hoechst Gosei Co., Ltd.) Colloidal silica 20 parts (Cataroid 5I-40, solid content 41%, manufactured by Catalyst Kasei Kogyo Co., Ltd.) Water

20 parts of a water-based paint are applied to one side of a substrate 1 consisting of a transparent unstretched polyester film 250 μm thick.

Apply using an applicator (1 mil) and apply at 60'C.
It was dried in a dryer for 5 minutes.

An ink fixing layer 2 having a thickness of 3 μm was formed on the obtained film.

Printing 3 was applied to the second film using an RI tester.

General ink was used as the ink, and the volume was 0.25 cc.

When the ink setting time of this product was measured, it was 35 minutes.

When this printed film was molded using a vacuum forming machine, a molded article 5 with high gloss and excellent abrasion resistance was obtained.

Example 2 20 parts of colloidal silica (Kalloid 5I-40, solid content 4 ml, manufactured by Catalysts Kasei Kogyo Co., Ltd.) Water
It was carried out in the same manner as in Example 1 using a water-based paint consisting of 20 parts.

When the ink set time of this product was measured, it was 40 minutes. When this printed film was molded using a vacuum forming machine, a molded product with high gloss and excellent abrasion resistance was obtained.

Example 3 After applying printing 3 similar to Example 1 to the ink fixing layer 2 in Example 1- by reverse plate printing, using a general white ink on the printed surface, printing was performed with an RI tester to make it opaque. Layer 4 was formed.

When this printed film was molded using a vacuum forming machine with the substrate 1 side facing up, a molded product 5 with high gloss and excellent abrasion resistance was obtained.

Comparative Example Only the same modified acrylic emulsion as in the above example was applied and dried in the same manner as above to obtain a film on which an ink fixing layer with a thickness of 3 μm was formed.

This film was printed using an RI tester in the same manner as above.

When the ink setting time of this product was measured, not only did it take 5 hours, but a clear printed image could not be obtained.

〔Effect of the invention〕

The present invention is as described above, and the printed transparent molded product to which the present invention is applied has ink set property,
The ink drying properties and ink fixation properties were good, and the workability of offset printing and letterpress printing was significantly improved. In addition, by mixing colloidal silica, general properties such as heat blocking properties, moist heat blocking properties, scratch resistance, stain resistance, and slip properties are significantly improved compared to conventional products without compromising transparency. Therefore, it is suitable as a printed transparent molded product used for packaging toys, stationery, daily necessities, foods, medicines, etc.

On the other hand, the printed molded product of the present invention is subjected to reverse printing,
By providing an opaque layer on the printed surface and molding with the non-printed side facing up, in addition to the above effects, the abrasion resistance is significantly improved, the printing becomes clearer, and the gloss is also significantly improved. It is possible to form a package that looks good.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the transparent printing paper used in the present invention, FIG. 2 is a cross-sectional view of the transparent printing paper of FIG. 1 with an opaque layer formed on the printed surface, and FIG. 61 is a perspective view of an example of a molded product of the present invention obtained by printing on the printing paper shown in the figure, and then molding the product. 61: Moldable plastic film; 2: Ink fixing layer; 3: Printing. , 4... Opaque layer, 5... Molded article i Mouth 2 Concave perforation Yoshikuni Koizumi 2 Procedural amendment (self-imposed July 22, 1991 Wataru Fukazawa, Commissioner of the Patent Office 1, Display of the case 1990 Patent Application No. 116310 2, Molded article with the name of the invention printed 3, Person making the amendment Relationship to the case Add the text of the patent applicant. Also, the non-printing side (use side) A coating may be applied to impart scratch resistance.For imparting scratch resistance, there is a method of coating with UV (ultraviolet) curing resin or EB (electron beam) curing resin and irradiating it with ultraviolet rays or electron beams. ( 2) Similarly, after the 4th line of page 13, change the line and add the following sentence: Address: 3-10 Nihonbashi Yokoyama-cho, Chuo-ku, Tokyo Name: Nisshinbo Co., Ltd. Representative 1) Tatsuo Bebe 4; Agent Postal Code 105 It is also suitable as an in-mold label because it is possible to perform offset printing on the unused side (back side) and the printed side will not be damaged. 5. Subject of correction

Claims (1)

[Claims] 1. An ink fixing layer is provided by coating at least one side of a base material made of a moldable transparent plastic film with a coating liquid containing emulsion and colloidal silica as main components; 1. A printed transparent molded product, characterized in that it is made by molding transparent printing paper onto which printing is applied by offset printing, letterpress printing, etc. into an appropriate shape. 2. An ink fixing layer is provided by applying a coating liquid containing emulsion and colloidal silica as main components to one side of a base material made of a moldable transparent plastic film, and offset printing or letterpress is applied on the ink fixing layer. A printed molded product characterized by forming an opaque layer on the printed surface of transparent printing paper that has been reverse-printed by printing, etc., and molding it into an appropriate shape with the non-printed surface facing up. .