JPS5834334B2 - Insulating cup that prevents blocking and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulating cup that prevents blocking and a method for manufacturing the same.

The heat insulating cup 3, which is made by covering a paper cup main body 1 with a cylindrical heat insulating wall 2, as shown in FIGS. The insulating cup has a flat paper surface, which allows for the full printing effect, and its structure is similar to cardboard, making it stronger and reducing material costs. It has the feature that a space is created between the paper cup main body and the heat insulating wall between the foamed resin, which promotes the heat insulation effect and also reduces the amount of resin used.

However, in the above-described heat-insulating cup, since the thickness of the foamable resin layer is uniform in the vertical direction, the slope of the main body wall of the paper cup matches the slope of the heat-insulating wall. A drawback is that it is difficult to separate the cups when stacked in a stack.

Therefore, in the present invention, a protrusion is formed on a portion of the cup to minimize the contact area when the cups are stacked, thereby making it easier to separate the cups from each other and preventing blocking.

That is, the present invention provides a heat insulating cup in which a paper cup main body is covered with a cylindrical heat insulating wall, and the foamed resin provided inside the heat insulating wall is formed in some places higher than other parts, thereby increasing the heat insulating wall. A heat insulating cup formed with projections is defined as a specified invention, and in manufacturing the heat insulating cup according to this specified invention, the foamable resin inside the heat insulating wall blank is printed with foamable ink by gravure printing, screen printing, etc. The feature is that the foaming ink is formed into spots in some areas so that the amount of foaming ink adhered to is larger than in other parts, and then the paper cup itself is inserted into the wound insulation wall, and then the foaming ink is foamed. That is.

The embodiments shown in the drawings will be described below.

First, the insulating cup according to the present invention will be explained. Fig. 3 shows a stacked state of the insulating cup according to the present invention, and Fig. 3A shows a partially cut side view, and Fig. 3A shows a partially cut side view. 2 shows a cutaway plan view of the same as above, in which a spot-shaped portion is formed when the foamable resin layer 4 formed on the inner surface of the heat insulating wall blank 2 is packaged on the paper cup main body 1, and the portion 4t is formed one step higher than the other portion 4".

Protrusions are formed on the heat insulating cup by forming the spot-shaped part one step higher than the other parts in this way, and when the heat insulating cups 3 with the protrusions formed in this way are stacked,
Because of the protrusions, a gap α is created between the cups, and since the cups do not come into close contact with each other, they can be easily separated.

Note that the foamed synthetic resin layer 4 may be adhered and formed on the outer surface of the main body wall of the paper cup.

As the structure of the foamable resin layer 4, various patterns 1 to 1 in FIG. 4 are adopted.

Figure 4 A 2, C, 2, H, G, and C all indicate foamable resin formed in a linear shape, and Figure 4 A 2 and G indicate vertical linear foamability. Fig. 4 (c) shows a plurality of horizontally lined foamed resins arranged in parallel in the vertical direction, and Fig. 4 (2) shows the linear direction of Fig. 4 (a). Figure 4 shows a diagonally inclined one, Figure 4 shows one in which the line shape in Figure 4 A is formed into a zigzag shape, and Figure 4 C shows one in which the line shape in Figure 4 A is formed into a fan shape. Yes, 4 in the diagram
1 shows a portion formed one step higher than the other portion 4''.

Note that the high portion 41 and the low portion 4'' may be continuous.

Also, FIG. 4(e) shows one that is formed in a circular shape, unlike the previous one, and numeral 41 in the figure shows one that is similarly formed one step higher than the other parts.

Therefore, an example of such a cut surface is shown in FIG. 5.

Next, to explain the manufacturing method of the above-mentioned heat insulating cup, as shown in FIG. Print (including coating) in the shape shown in Figures 4 and 5.

Thereafter, as shown in FIG. 6, it is passed through a thermal foaming machine to foam, but this foaming operation is performed after it is combined with the paper cup main body, which will be described later.

Next, as a different embodiment, as shown in FIG. 7A, adhesive material 5 is first printed (including coating) on the paper material 2 according to the pattern shown in FIGS. 4 and 5.

After that, the foamable resin powder 41 is sprinkled as shown in Figure 7, and then the foamed resin is attached to the adhesive 5 surface as shown in Figure 7C, and the foamed resin powder that does not adhere is shaken off. It is formed by foaming as shown in FIG. 2, but this foaming operation is performed after the assembling step described later.

Note that the foamable ink 4/1 adhesive 5 may be printed on the peripheral wall of the paper cup.

As mentioned above, the foamable resin on the inner surface of the insulation wall blank is formed mainly on the insulation wall blank or paper cup by printing foaming ink so that the amount of foaming ink adheres to some parts is larger than other parts. A heat insulating sheet is wound in a conventional manner to form a cylindrical heat insulating wall, a paper cup main body 1 prepared in advance is inserted into the wall, and then foaming ink is foamed.

Changes in the amount of foamable ink deposited can be adjusted by performing printing twice or more.

In any case, according to the heat insulating cup and its manufacturing method according to the present invention, it not only has the features of the conventional heat insulating cup, but also can effectively prevent blocking due to the protrusions formed on the heat insulating wall. By forming the foamable resin by printing, the surface of the cup can be printed at the same time.Furthermore, the foamable resin can be formed into any shape by printing, and the amount of foamable resin used can be reduced. It is characterized by being able to minimize waste pollution at low cost, and because the foaming is done after inserting a cylindrical insulating wall into the paper cup, the foaming creates a It is characterized by complete fixation.

[Brief explanation of the drawing]

Figure 1 (A) 2 is an exploded perspective view of the heat insulating cup, Figure 2 is a partially cutaway front view of the heat insulating cup, and Figure 3 (A) is a partially cutaway view showing the laminated state of the heat insulating cup of the present invention. Figures and cut-away plan views, Figures 4-1 are developed plan views showing different embodiments of the heat-insulating wall of the present invention, Figure 5 is a cross-sectional view of the heat-insulating wall of the present invention, Figure 6
Figure A 2 and Figure 7 Il 2 are explanatory diagrams showing the manufacturing method of the present invention. 1... paper cup main body, 2... heat insulation wall,
3...Insulation cup, 4...Synthetic resin layer, 4'...Protrusion.

Claims (1)

[Scope of Claims] 1. In a heat-insulating cup formed by covering a paper cup body with a cylindrical heat-insulating wall, some parts of the foamable resin provided between the inner surface of the heat-insulating wall and the outer surface of the main body of the paper cup are replaced with other parts. A heat insulating cup made by forming a protrusion on the heat insulating wall by forming it higher than the wall. 2. In the method of manufacturing a heat insulating cup in which a paper cup main body is covered with a cylindrical heat insulating wall, foamable ink is printed on the inner surface of the heat insulating wall blank or on the outer surface of the paper cup main body, so that some parts are coated with more foamable ink than other parts. A method for manufacturing an insulating cup, which is characterized in that it is formed into a spot shape so that the amount of adhesion is increased, and then the main body of the paper cup is inserted into a wound insulating wall, and then foaming ink is foamed. 3. The method for manufacturing a heat insulating cup according to claim 2, wherein the change in the amount of foaming ink adhered to is adjusted by overprinting twice or more.