JPH0452135A - Double-side printed shading film - Google Patents

Abstract

PURPOSE:To provide shading properties and to sense the mark of a photoelectric tube aligning a pitch by the photoelectric tube when printing is applied to the surface and rear by providing a metallized layer to the single surface of a specific transparent film and applying white printing to both surfaces of the film and further applying display printing on the white printing. CONSTITUTION:A metal layer 2 is applied to the single surface of a transparent film 1 becoming a base material by vapor deposition and white printing layers 3 are applied to both surfaces of the film having the metal layer composed of aluminum formed thereto by vapor deposition and a monochromatic or multicolor display printing layer 4 is further applied to both surfaces or single surface of the film provided with the white printing layers. When display printing is applied, a photoelectric tube mark 5 is applied in the process prior to display printing processing or simultaneously with the first color printing for the purpose of carrying out alignment of a plurality of printings within the single surface or printing alignment within both surfaces. The photoelectric tube mark 5 is applied to the single side edge of the single surface of the vapor deposition film 1 at a region where no white printing is applied to both surfaces. The photoelectric tube mark 5 can be confirmed even on both surfaces to which the photoelectric tube mark is not applied by a photoelectric tube through the vapor deposition surface and the printing alignment between the surface and rear becomes possible.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention has a light-shielding property, so when printed on both sides, the printing on the back side is not transmitted through and is clear. This relates to a film sheet that can be read with a phototube and therefore automated.

(Prior art) Conventionally, a film sheet is used, which is made of a film with improved payload hiding properties by laminating aluminum foil or coloring with titanium dioxide, etc. There were disadvantages such as the inability to read the paper, or the coloring did not provide sufficient light-shielding properties, allowing the back printing to be seen through.

(Problem to be solved by the invention) The purpose is to provide light-shielding properties by using a vapor-deposited film such as aluminum, and when printing on the front and back sides, a phototube mark for pinch alignment can be printed using a phototube. The purpose is to provide a film that can be detected.

(Means for Solving the Problems) The present invention has a transparent film having a total light transmittance of 80% or more, a vapor-deposited metal layer on one side, and white printing on both sides of the transparent film with the metal layer. This double-sided printed light-shielding film is further characterized in that display printing is performed on both sides or one side of the white printing.

The transparent film used in the present invention is a biaxially oriented film such as a biaxially oriented polyester film, a biaxially oriented polypropylene film, a biaxially oriented nylon film, or a biaxially oriented film such as a hard vinyl chloride film, a polyvinyl alcohol film, a polymethyl methacrylate film, etc. A film that is not axially stretched and has a total light transmittance of 80%.
Use the above.

The thickness is preferably 9 microns millimeters (μm) or more, or preferably 300 μm or less for use as a bag-shaped package for boat fishing or a lid film for a blister pack. Further, in order to perform vapor deposition of aluminum or the like, it is preferable that the film be suitable for vacuum vapor deposition processing, for example, a film that does not easily generate gases such as moisture in vacuum. At the same time, co-treatment to improve the adhesion of aluminum, etc.
Chemical treatments such as plasma treatment and coating the surface layer with an adhesive may also be performed.

Vapor deposition of aluminum, etc. can be performed using aluminum,
Among them are nickel, chromium, etc., and aluminum is the most preferable in terms of cost.

Further, the most preferable method for vapor deposition is vacuum vapor deposition, but other methods such as sputtering and EB vapor deposition may also be used.

As shown in Figure 1, a metal layer (2) is applied by vapor deposition on one side of a transparent film (1) serving as a base material, and white printing (3) is applied to both the front and back sides of the vapor-deposited film such as aluminum. One-color or multi-color display printing (4) is applied to both sides or one side of the white print. White printing and display printing may be performed simultaneously or sequentially. When performing tatami display printing, is it necessary to perform the phototube mark in the pre-processing process of display printing processing or at the same time as the first color printing for the purpose of aligning multiple prints on one side and aligning prints on the front and back sides? be.

As shown in Figure 2, the phototube mark is printed in white on one side of the vapor-deposited film, such as aluminum, or is printed in white on both sides where no markings are made.

The photoelectric mark can be recognized by a photoelectric tube from both sides where the photoelectric tube mark is not applied, through the vapor-deposited surface of aluminum or the like, making it possible to align the print position between the front and back sides.

(Example) In the example, an axially stretched polyester film having a thickness of 25 μm was subjected to aluminum vapor deposition, and then the vapor-deposited film was slit into a width of 600 mm. As in Figure 2, white printing was applied to both sides of the film except for the edges. Next, a phototube mark was printed on the white-printed film at the edge of the film where the white-printing was not applied. After that, while confirming the position of the phototube mark using a phototube, we printed three colors on the front side and one color on the back side, completing a double-sided printed light-shielding film. The obtained film has a printing position between the front and back sides that is almost the same as the target design dimensions, and a double-sided printing film with good light-shielding properties and no misalignment can be obtained.

Example 2 In Example 1, a biaxially oriented polypropylene film was used instead of the biaxially oriented polyester film, and front and back printing was performed in two colors on one side and in four colors on the opposite side.

The effect was the same as in Example 1.

(Effects of the invention) The double-sided light-shielding film of the present invention allows continuous printing on each side of the front and back sides, as well as between the front and back sides, and has a hidden property, so the printing on the back side does not pass through, so the finished product can be seen clearly. This eliminates the disadvantages of conventional off-line pitch adjustment or pattern molding.

In addition, in-line continuous molding also provides a more beautiful print finish compared to using colored sheets made of titanium dioxide, etc., making it possible to establish a very useful manufacturing method.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the double-sided printed light-shielding film of the present invention, and Figure 2 is a cross-sectional view of a film with phototube marks for explaining an example of manufacturing the display printing layer of the double-sided printed light-shielding film of the present invention. FIG.

Claims (1)

[Claims] (1) A transparent film with a total light transmittance of 80% or more has a vapor-deposited metal layer on one side, white printing is applied to both sides of the transparent film with the metal layer, and furthermore, both sides or one side of the white printing is applied. A double-sided printed light-shielding film characterized by display printing.