JPH0154180B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing fruit-shaped containers, and more specifically, a plastic film printed with two or more colors with gradation areas interposed between the colors. The present invention relates to a method for manufacturing a fruit-like container in which the entire container has a colored appearance similar to that of a natural fruit, by drawing and forming a laminated sheet in which the laminate sheets are laminated together.

[Prior Art] Conventionally, containers for filling foods, especially foods that use fruit or flavor of fruits, have been used.
For example, packaging containers for various types of jellies, juices, frozen desserts, syrups, jams, etc. express the image of the food to be filled on the exterior of the container, clearly indicating the contents,
The containers are designed to give a sense of beauty and luxury. For example, containers may be made of transparent plastic so that the contents stored therein can be seen from the outside, containers may be colored in a single color that matches the flavor of the fruit they are filled with, or containers may be filled with filling material on the side of the container. Means such as printing a fruit that fits the object or forming the container itself into the shape of a fruit have been adopted.

[Problems to be Solved by the Invention] However, since the appearance of natural fruits such as apples and peaches has subtle changes in the color of the surface, it is difficult to change the appearance of such fruits by the above method. It is difficult to express on the surface of the container. That is, transparent containers do not give an image of the fruit itself, and colored containers are limited to monotonous colors and cannot express the complex shading and natural color changes of fruits. In addition, printing on the side of the container becomes impossible if the shape of the container becomes complex, and since it is not possible to print the entire surface of the container up to the bottom, it is not possible to print only on the simple shape or the side. It was limited to what it could do. Further, as for the method of forming the shape of a fruit on the container itself, it is insufficient to make the container resemble a natural fruit.

The present invention was created in order to solve the above-mentioned drawbacks, and an object of the present invention is to provide a method for manufacturing a fruit-shaped container in which the complex colors of natural fruits are displayed throughout the container's appearance. It is.

[Means for Solving the Problems] That is, the present invention provides a plastic film that is preprinted with two or more colors with gradation areas between the colors so as to have a fruit-like appearance after thermoforming. This is a method for producing a fruit-shaped container, in which a laminated sheet made by laminating a thermoformable plastic sheet and a thermoformable plastic sheet is formed into a container shape so that the gradation part is stretched and the drawing ratio is 0.1 to 2.0.

In the present invention, the gradation portion refers to a portion where the color changes continuously in steps from one color to another.

[Function] In the first place, the present invention aims to artificially obtain the appearance of natural fruits, which is difficult to obtain in a state close to nature by printing, because of their various color changes.

The technical difficulty in reproducing the natural appearance of fruits is not only that natural fruits have a wide variety of colors, but also that the connection state of continuous gradual color changes between colors is extremely subtle, and printing This is something that is difficult to express.

In the present invention, the continuous stepwise color change between the colors of natural fruits is expressed in advance by printing, although it is insufficient, and then the container is formed by stretching this to have an aperture ratio of 0.1 to 2.0. by doing,
A container with a natural fruit-like appearance can be obtained.

The stretching of the gradation area in the present invention has the effect of blurring the continuous stepwise color change, making it extremely natural, and reproducing the gradation area similar to the gradation area of natural fruits. Eggplant.

The aperture ratio in the present invention is a condition for obtaining appropriate blurring.If the aperture ratio is too small, the blurring will be insufficient, and if it is too large, the blurring will be excessive.In either case, a natural fruit-like appearance is achieved. will not be obtained.

[Example] Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a perspective view showing one embodiment of a fruit-shaped container according to the present invention, and shows an apple-shaped pattern on the exterior of the container. FIG. 2 is a plan view showing the printed state of the plastic film before molding, and FIG. 3 is a longitudinal sectional view taken along the line AA. The fruit-shaped container 1 according to the present invention has a red portion 2a on the upper side of the side wall, and a yellow portion 2b on the lower side and the bottom. Further, the core 4 is formed by printing on the bottom surface. Between the red part 2a and the yellow part 2b, a gradation part 2c is formed in which the color changes continuously in steps from red to red-yellow to yellow-red to yellow, and red and yellow are mixed in a complex manner. Forms color changes and patterns close to natural colors.

The fruit-shaped container 1 according to the present invention is obtained by molding a laminated sheet in which a printed plastic film 2 and a plastic sheet 3 are bonded together. As shown in FIG. 2, the surface of the plastic film 2 is circularly printed, with a red part 2a' on the outer periphery, a yellow part 2b' in the center, and a gradation part 2c' in the middle. , cores 4' are formed concentrically on the bottom surface, resembling the appearance of an apple. The plastic film used has a thickness of 0.02 to 0.1 mm, and is made of a thermoformable material such as polystyrene resin, polyvinyl chloride resin, or polypropylene resin. The color change of the gradation portion 2c' is formed by adjusting the color to match the color change of the target fruit. In this embodiment, the color is toned to a mixture of red and yellow to resemble the color change of an apple, but this need not be so exact. Further, the above printing method may be any one of gravure printing, offset printing, flexo printing, etc.

The plastic sheet 3 to which the above plastic film 2 is attached has a thickness as shown in Figure 3.
A thermoformable material such as polystyrene resin, polyvinyl chloride resin, or polypropylene resin with a thickness of 0.1 to 1.5 mm is used, and the printed surface of the plastic film 2 is bonded or bonded with or without an adhesive. Attach by heat fusing. Although the plastic sheet 3 may be a colored sheet, a white sheet is generally preferred since it is used as a food container and the color can be easily adjusted. Furthermore, the plastic sheet is not limited to a single layer, and may be formed from multiple layers of the same or different types of plastic sheets.

A laminated sheet in which the plastic film 2 and the plastic sheet 3 are pasted together in the manner described above is drawn and formed into a cup shape (as shown in FIGS. 1 and 3) using a molding machine. The printed area of the plastic film 2 is stretched by drawing, and in particular, the gradation area 2c' is stretched and undergoes a blur-like change, so that the color continuity is extremely natural. becomes. Therefore, on the surface of the fruit-shaped container 1, an appearance resembling a natural fruit, which cannot be obtained by conventional techniques, is formed, and a beautiful appearance and a sense of luxury are expressed.

The drawing ratio during molding is expressed as (depth of the container)/(diameter of the opening of the container), and the gradation portion 2c that appears in the appearance of the fruit-shaped container is influenced by this drawing ratio.
Usually in the range of 0.1 to 2.0, preferably 0.3 to 1.5,
When the aperture ratio exceeds 2.0, the blur-like changes become extreme and do not resemble natural fruit-like color changes.
When it is less than 0.1, the state is almost the same as that printed on plastic film, and it is not possible to obtain the natural fruit-like color change formed by stretching by drawing. As reference figures, Reference Figure 1 shows a natural color photograph showing the printed part of the plastic film 2 in Figure 2, and Reference Figure 2 shows a natural color photograph of a fruit-shaped container obtained by molding a laminated sheet with the plastic film laminated together. Color photos shown.

Next, other embodiments of the fruit-shaped container according to the present invention are shown in FIGS. 4 and 5. FIG. 4 is a plan view of the plastic film 2 printed to resemble the appearance of grapes, including a reddish-purple part 2d', a bluish-purple part 2e', and a gradation part in which the colors of both are successively changed in steps. 2f'. When a laminated sheet in which a plastic sheet 3 is bonded to this plastic film 2 in the same manner as in the above embodiment is drawn into a hemispherical shape as shown in FIG. An appearance similar to natural grapes with 2f is formed. In this way, the appearance of the container that resembles that of various fruits can be formed by a simple method.

Furthermore, in the above embodiments, the printed surface of the plastic film and the plastic sheet were bonded together to maintain the glossy appearance, but in this case, the printed surface is drawn and formed so that it appears on the outer peripheral wall surface of the fruit-shaped container. It may be.

[Effects of the Invention] As explained above, according to the present invention, an appearance resembling a natural fruit is formed on the surface of the container, which improves the beauty and luxury of the container, and has the effect of being easily obtainable. .

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of a fruit-shaped container according to the present invention, FIG. 2 is a plan view showing the printed state of the plastic film of FIG. 1 before molding, and FIG.
4 is a plan view showing a printed state of a plastic film according to another embodiment of the present invention before molding; FIG. 5 is a longitudinal sectional view of a molded container using the plastic film of FIG. 4; It is. 1... Fruit-shaped container, 2... Plastic film, 2a, 2a'... Red part, 2b, 2b'... Yellow part, 2c, 2c', 2f, 2f'... Gradation part, 2d,
2d'... Red-purple part, 2e, 2e'... Blue-purple part, 3...
Plastic sheet, 4,4'...core.

Claims (1)

[Claims] 1. A laminate consisting of a thermoformable plastic sheet and a plastic film that has been pre-printed in two or more colors with gradation areas between the colors to give a fruit-like appearance after thermoforming. The sheet is stretched in the gradation part and the drawing ratio is
A method for manufacturing a fruit-shaped container, characterized by forming the fruit-like container into a container shape so that the particle size is 0.1 to 2.0.