JP2000272218A - Manufacture of polypropylene sheet and polypropylene film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain beautiful print sheet and film gentle for a global environment by sequentially offset printing a printing surface of a polypropylene sheet or film body, varnishing transparently the printing surface, and printing the varnished surface with a UV transparent ink. SOLUTION: A surface of a polypropylene sheet body 1 having softness of the same degree as that of a vinyl chloride sheet is multicolor offset printed, and then a transparent medium (trade name) is varnished for retaining the printing surface on the printed surface 2. Then, the varnished surface 2 is silk printed 4 with a UV transparent ink for forming a glaze and a depth, thereby obtaining a completed product 5. Operability when produced capable of reducing its cost is upgraded without deteriorating an environment. A desire of scarcely receiving a damage can be completely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a method for producing a glossy, deep, sufficiently clean printed polypropylene sheet or polypropylene film.

[0002]

2. Description of the Related Art Heretofore, vinyl chloride sheets and films have been printed sufficiently cleanly, and many products thereof have been provided. However, these vinyl chloride sheets and films have a fatal defect that toxic substances such as chlorine-based gas and dioxin are generated upon disposal by incineration or the like, thereby deteriorating the environment.

[0003] Most of such vinyl chloride sheets (films) are printed on the surface of a main body base sheet, and then a transparent vinyl chloride sheet is applied to the printed surface to prevent ink peeling and to polish the surface. It had been obtained by performing a combining process.

Since this kind of vinyl chloride has a structure in which two vinyl chloride sheets are laminated as described above, the cost is relatively high and it is difficult to reduce the cost, and the outer surface is susceptible to abrasion. In addition, when performing printing and laminating work, the low softening temperature of the vinyl chloride sheet may cause bending or unevenness that may hinder printing. In order to avoid the problem, it is necessary to perform printing and laminating with a contact member on the back side (lower surface).

In view of the current situation, the present invention is intended to meet the demand for sheets and films that do not degrade the environment, reduce costs, have good workability during production, and are not easily damaged. is there.

Therefore, the present inventor first responds to the demand by adopting a polypropylene (of the same degree of softness as a vinyl chloride film), which does not generate toxic substances even when incinerated and is environmentally friendly. However, it was not possible to easily obtain a sheet (film) having sufficiently clean print, gloss and depth like a vinyl chloride sheet / film.

As a result of further studies, the inventor was able to obtain a sufficiently clean printed and usable polypropylene sheet and film.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a printed sheet and film which is free from toxic gas even when incinerated, is environmentally friendly, does not have the above-mentioned defects and problems, and is sufficiently clean. New polypropylene
It is an object of the present invention to provide a method for producing a sheet and a polypropylene film.

[0009]

In order to achieve the above object, a method for producing a polypropylene sheet and a polypropylene film according to the present invention comprises a step of performing offset printing on a printing surface of a polypropylene sheet or a body of a polypropylene film. The step of applying a transparent varnishing to the printing surface and the step of printing with the UV transparent ink on the varnishing surface are performed in order, and the printing surface of the polypropylene sheet or the polypropylene film body is obtained. And a step of performing printing with UV transparent ink on the offset printing surface in order.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. First, in the first embodiment shown in FIG. 1, multicolor offset printing is performed on the surface of a polypropylene sheet main body 1 having the same degree of softness as a vinyl chloride sheet.
A varnish is applied to the printing surface with a transparent medium (trade name) to hold the same printing surface, and then a silk printing 4 with UV transparent ink is applied to the varnishing surface 3 for luster and deepening. Is obtained.

In the second embodiment shown in FIG. 2, multicolor offset printing is performed on the surface of a polypropylene sheet body 1 having the same degree of flexibility as a vinyl chloride sheet.
Then, on the printing surface 2, silk printing 4 using UV transparent ink for holding down the printing surface and for giving out gloss and depth.
And thus a finished product 5 is obtained.

These finished products 5 can be used in place of all the products made of vinyl chloride which occupy a large amount in the market, and include, for example, a case material for a brush, a material for a file album, It is mainly used for case exterior materials, printed covers, accessories, bags, and other alternatives to products made of vinyl chloride.

[0013]

According to the present invention, it is possible to obtain a PP (polypropylene) sheet film having a softness close to that of soft vinyl chloride, a glossy and deep, and a sufficiently clean print. Therefore, it is possible to completely achieve the intended purpose of meeting the demands of not deteriorating the environment, enabling cost reduction, improving workability at the time of production, and reducing trauma. .

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a part of a finished product obtained by a first embodiment according to the present invention.

FIG. 2 is an enlarged sectional view showing a part of a finished product obtained by a second embodiment according to the present invention.

[Explanation of symbols]

 1 Polypropylene sheet body 2 Color printing surface 3 Varnishing surface 4 UV transparent ink printing surface 5 Finished product

Claims (2)

[Claims] 1. A step of performing offset printing on a printing surface of a polypropylene sheet or polypropylene film body, a step of applying a transparent varnish to the offset printing surface, and a step of performing printing with UV transparent ink on the varnished surface. What is claimed is: 1. A method for producing a polypropylene sheet and a polypropylene film, the method comprising: 2. A method according to claim 1, wherein the step of performing offset printing on the printing surface of the polypropylene sheet or polypropylene film body and the step of performing printing with UV transparent ink on the offset printing surface are sequentially performed. Production of sheet and polypropylene film.