JP2002128049A - Beverage cup with window - Google Patents

Abstract

(57) Abstract: A beverage cup having a structure in which a window is provided in a container body member. SOLUTION: In a paper cup comprising a body member and a bottom plate member, at least a part of a character, a symbol, a figure and / or a pattern printed on an outer wall surface of the body member is punched to open a window, and the cup is opened. A high-strength thermoplastic film selected from the group consisting of polyethylene terephthalate, ethylene-vinyl alcohol copolymer, polypropylene and ionomer resin is laminated on the inner surface and / or outer surface of the body member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a beverage cup. More particularly, the present invention relates to beverage cups having variously shaped windows formed in the container body.

[0002]

2. Description of the Related Art In a so-called fast food restaurant such as a hamburger, cold drinks such as soft drinks (eg, juice, iced coffee, shakes, etc.) are sold together with foods such as hamburgers and french fries. Is common. BACKGROUND ART Conventionally, beverages such as cold drinks have been filled in paper cups and sold to users.

[0003] A container used for such a purpose generally has a structure in which a body member and a bottom plate member are integrated, and the inside and outside surfaces are coated with wax, or the inside and outside surfaces are made of polyethylene or the like. Such a thermoplastic film is laminated so that even if the inside is filled with a liquid, the liquid does not leak to the outside.

[0004] Recently, a cup has been trial-produced in which a window is opened in the container body member so that the contents can be viewed from the outer wall side of the container body member. For example, Japanese Utility Model Laid-Open No. 57-153235 discloses that a viewing window is provided in a peripheral portion, a transparent water-resistant film is bonded to the inner surface of a cup, and a measuring scale is provided at least in proximity to the viewing window. The attached paper urine collection cup is described.

However, in the cup with a paper window described in Japanese Utility Model Laid-Open Publication No. 57-153235, the window extends from the bottom of the container to the lip, and is provided only in one place. It is used only for the specific purpose of collecting urine. Therefore, a cup having the same structure cannot be diverted as a beverage cup.

[0006]

Accordingly, an object of the present invention is to provide a beverage cup having a structure in which a window is provided in a container body member.

[0007]

The object of the present invention is to provide a paper cup comprising a body member and a bottom plate member, wherein at least a part of characters, symbols, figures and / or patterns printed on the outer wall surface of the body member. A high-strength thermoplastic film selected from the group consisting of polyethylene terephthalate, ethylene-vinyl alcohol copolymer, polypropylene and ionomer resin having a thickness of 60 μm or less on the inner surface and / or outer surface of the cup body member while opening the window by punching. It is solved by laminating.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a beverage cup with a window according to the present invention. FIG.
1 is a schematic sectional view of an example of a beverage cup with a window according to the present invention. The beverage cup with window 1 of the present invention basically comprises a paper container body member 3 and a paper bottom plate member 5. At least one or more windows 7 are opened at appropriate locations on the container body member 3. A high-strength thermoplastic film 9 is laminated on the inner surface of the container body member 3. The high-strength thermoplastic film 9 shields the window 7 and prevents liquid leakage. If a transparent film is used for the high-strength thermoplastic film 9, the contents of the container can be visually observed through the window 7 provided in the container body member. The film 15 is also laminated on the inner surface of the bottom plate member 5, and this film 15 may be made of the same material as the high-strength thermoplastic film 9, or may be made of a different material.

As shown in FIG. 2, the window 7 can be opened by stamping out at least a part of characters, symbols, figures and / or patterns printed on the outer surface of the container body member 3. By dispersing the opening position of the window up and down, not only can the remaining amount of contents be known from outside the container,
A unique aesthetic effect can also be obtained.

As shown in FIG. 3, the high-strength thermoplastic film 9 can be laminated not only on the inner surface of the container body member 3 but also on the outer surface. Alternatively, the container body 3
It is also possible to laminate the high-strength thermoplastic film 9 only on the outer surface of the
Since the liquid in the container penetrates into the container body member 3 from below, it is not preferable because the overall strength of the container 1 is reduced. Therefore, in this case, it is preferable to laminate a conventionally used film such as polyethylene on the inner surface side of the container body member 3. When laminating the high-strength thermoplastic film 9 on the inner surface side of the container body member 3, it is preferable to laminate a conventionally used film such as polyethylene on the outer surface side. If you need particularly strong mechanical strength,
The high-strength thermoplastic film 9 is preferably laminated on both the inner surface and the outer surface of the container body member 3.

The high-strength thermoplastic film laminated on the inner surface and / or outer surface of the container body member 3 is selected from the group consisting of polyethylene terephthalate, ethylene-vinyl alcohol copolymer, polypropylene, and ionomer resin. These films are commercially available from various chemical manufacturers such as Mitsui, Mitsubishi, Toray and Dupont.

The thickness of the high-strength thermoplastic film used is preferably not more than 70 μm. When the thickness of the high-strength thermoplastic film to be laminated is more than 70 μm,
Not only is the natural feel of the paper cup itself impaired, but also the work of extruding and laminating the base paper becomes difficult, which is not preferable. The lower limit of the thickness of the high-strength thermoplastic film is 15
It is about μm. The high-strength thermoplastic film selected from the group consisting of polyethylene terephthalate, ethylene-vinyl alcohol copolymer, polypropylene and ionomer resin has a sufficient mechanical strength even though it is thin,
Is hardly broken even when struck with a relatively thin tool such as a straw, coffee muddle or finger, and it is possible to effectively prevent the liquid in the cup from leaking to the outside. In fact, in the case of a polyethylene film laminated on the inner and outer surfaces of the body member of a conventional cold cup, if it is pierced with a straw or the like, the film is relatively easily torn, and the contents leak out of the container, resulting in product liability (PL). It is not preferable because it is easy to cause problems.

Next, a method of manufacturing the beverage cup shown in FIG. 1 will be described. First, the roll base paper is fed, and desired characters, symbols, figures, and / or patterns are printed on the outer surface of the base paper. Then, using a cutter such as a rotary die cutter or a press die cutter, characters, symbols,
Opening one or more window holes at desired locations in the graphic and / or pattern. Thereafter, a high-strength thermoplastic film selected from the group consisting of polyethylene terephthalate, ethylene-vinyl alcohol copolymer, polypropylene, and an ionomer resin having a predetermined film thickness on the inner side and, if desired, the outer side of the base paper having the window holes formed therein. Is laminated. At this time, an adhesive or a polyethylene film may be used as needed to laminate the high-strength thermoplastic film on the base paper. A container body member piece is obtained by slitting or punching the film-laminated base paper. A container bottom plate member piece is obtained by slitting or punching the same base paper or another film laminate base paper. The container body member piece and the container bottom plate member piece obtained in this way are integrated by a conventional cup molding machine to obtain a beverage cup as shown in FIG. 1 as a product.

[0014]

EXAMPLES The effects of the present invention will be specifically described below with reference to examples. Examples 1 to 3 and Comparative Examples 1 and 2 The strength of the laminate film used in the beverage cup with window of the present invention was measured. 15 μm thick polyethylene terephthalate film (Example 1), 15 μm thick
m of ethylene-vinyl alcohol copolymer with a film thickness of 1
A laminated film (Example 2) having a total thickness of 45 μm in which two layers of 5 μm polyethylene were laminated and a polypropylene film (Example 3) having a thickness of 50 μm were prepared. As a comparative control, polyethylene and a film having a thickness of 25 μm were further compared. 20μ thick
A laminated film having a total thickness of 45 μm (Comparative Example 1) obtained by laminating two polyethylene layers each having a thickness of 45 μm and a high-density polyethylene having a thickness of 45 μm and a low-density polyethylene having a thickness of 15 μm having a total thickness of 60 μm Film (Comparative Example 2)
Was prepared.

In order to measure the piercing strength of each film, a ball-point-like fitting having a tip opening angle of about 60 ° was used. Each film for measurement was firmly fixed to a table having a circular hole having a diameter of about 8 mm, a metal fitting was pressed against the film, and the piercing strength of the metal fitting was measured by a strograph. The measurement was performed five times, and the average value was used as the measured value. Taking the measured value of the film of Comparative Example 1 as 1, the strength magnification of each film was calculated. The results are summarized in Table 1 below.

[0016]

TABLE 1 specimen total thickness ([mu] m) average value intensity ratio Comparative Example 1 45 0.985 1.00 Comparative Example 2 60 1.053 1.06 Example 1 15 1.773 1.80 Example 2 45 2.389 2.42 Example 3 50 3.342 3.39

As is evident from the results shown in Table 1, the high-strength film of the present invention shows superior piercing strength even when the film thickness is small, as compared with the conventionally used polyethylene film. In the case of the conventional polyethylene, when the comparative example 1 and the comparative example 2 are compared, the strength increases only 1.06 times even if the thickness increases 1.33 times. Further, comparing Example 2 and Example 3, it can be understood that a single layer having a thicker thickness has a higher piercing strength than a multilayer.

[0018]

As described above, according to the present invention,
A high-strength thermoplastic film selected from the group consisting of polyethylene terephthalate, ethylene-vinyl alcohol copolymer, polypropylene, and an ionomer resin on the inner surface and / or outer surface of the body member in a beverage cup having a window opened on the wall surface of the container body member. By laminating, it is possible to obtain a beverage cup with a window that is resistant to tearing even when stabbed or the like. As a result, even if the container is filled with liquid, it is possible to effectively prevent an accident in which the film in the window portion is broken and the liquid leaks out of the container.

[Brief description of the drawings]

FIG. 1 is a sectional view of an example of a beverage cup with a window according to the present invention.

FIG. 2 is a development view of a body member of the cup shown in FIG. 1;

FIG. 3 is an enlarged partial cross-sectional view of a window provided in a container body member of the beverage cup with a window according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Beverage cup with window of this invention 3 Body member 5 Bottom plate member 7 Window 9 High-strength thermoplastic film 11 Cut edge 15 Laminate film for bottom plate member

Claims (6)

[Claims] 1. A paper cup comprising a body member and a bottom plate member, wherein a window is opened by punching out at least a part of characters, symbols, figures and / or patterns printed on the outer wall surface of the body member. A high strength thermoplastic film selected from the group consisting of polyethylene terephthalate, ethylene / vinyl alcohol copolymer, polypropylene and ionomer resin is laminated on the inner surface and / or outer surface of the cup body member, for a beverage with a window. cup. 2. The beverage cup with a window according to claim 1, wherein the high-strength thermoplastic film is laminated on an inner surface of a cup body member. 3. The window according to claim 1, wherein the high-strength thermoplastic film is laminated on an inner surface of the cup body, and a polyethylene film is laminated on an outer surface of the cup body. Drinking cup. 4. The beverage cup with a window according to claim 1, wherein the high-strength thermoplastic film is laminated on an inner surface and an outer surface of a cup body member. 5. The window according to claim 1, wherein the high-strength thermoplastic film is laminated on an outer surface of a cup body member, and a polyethylene film is laminated on an inner surface of the cup body member. Drinking cup. 6. The high-strength thermoplastic film having a thickness of 1
The window-equipped beverage cup according to any one of claims 1 to 5, wherein the cup has a size of 5 m or more and 70 m or less.