JP2001139017A - Heat insulation paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foamed heat insulation paper container which is adequately applicable to an automated machine working for sealing a seal cover or filling contents for a heat insulation paper container presently produced. SOLUTION: This relates to a heat insulation paper container. The body member 10 of the container is made of a material laminated with a high-density thermoplastic resin film 22 on the inner face of a base 21 and with a thermoplastic resin film 23 having a low melting point on the outer face of the base 21. The body member 10 is provided with a flange 11 at the top edge of its opening and formed in a cup shape integrally with a bottom. The thermoplastic resin film 23 having a low melting point on the outer face is heated for foaming. The flange part 11 is forcibly processed for forming a square cross section. The difference between the outer diameter A of the flange 11 and the boundary between the bottom part 14 of the flange 11 and the body member 10, i.e., the outer diameter B of the neck bottom part 16 is 6 mm or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container for ready-to-eat food, and to a heat-insulating paper container.

[0002]

2. Description of the Related Art A heat insulating property is provided in which a cylindrical paper outer cylinder is placed on the outside of a cup-shaped paper container main body to form a gap between the paper container main body and the paper outer cylinder to provide heat insulation. A paper container is known, for example, as disclosed in Utility Model Registration No. 2571797, or has a heat insulating property in which a corrugated intermediate paper is interposed between the paper container main body and the paper outer cylinder. Paper containers are also known. On the other hand, a paper container formed by laminating a low melting point thermoplastic synthetic resin film that foams by heat treatment on the outer wall surface of the base paper of the body material of the cup-shaped paper container is heated to form a thermoplastic synthetic resin. A foamed heat insulating paper container made by foaming a resin film is also disclosed in
It is known from JP-189279.

[0003]

As described above, the former heat-insulating paper container has been put to practical use as described above and is now on the market in large numbers.
Automatic machines for sealing lids are in operation. The dimensions of each part of the cup holder of the currently operating automatic machine are determined by the outer diameter of the upper flange part and the lower part of the upper flange part and the trunk part of the heat-insulating paper containers that are widely available on the market. It is determined according to the boundary portion, that is, the outer diameter of the lower part of the neck. For example, in an example of the cup holder of an automatic machine which is actually operated in conformity with the former heat-insulating paper container, as shown in FIGS.
0 of the receiving hole 41 has a diameter b of 92 mm, and among the positioning pins 42 of the cup standing at four positions outside the receiving hole 41, the positioning pins 42, 42 facing in the diameter direction of the receiving hole 41. The dimension a between them is 96 mm. This cup holder is compatible with the former commercially available heat-insulating paper container, which is designed so that the width of the lower surface of the flange part is reduced by covering the container body with an outer cylinder to make it a heat-insulating container. It was made.

[0004] In view of the above, the above-mentioned foamed heat-insulating paper container made by heating and foaming the above-mentioned low-melting-point thermoplastic synthetic resin film is manufactured, and this is processed by an automatic machine currently in operation.
When the contents are filled and the seal lid is sealed, there arises a problem that the dimensions do not conform to the dimensions of the cup holder of the automatic machine described above, especially due to the difference in the size or shape of the flange portion. That is, in the latter foam-insulated paper container, as shown in FIG. 3, the flange portion 31 of the upper opening portion 32 of the body member 30 constituting the container body has a circular cross-sectional curl shape as shown in FIG. 30 has a thickness of 0.4 mm or more, so that the outer diameter C of the curled portion is at least 3.45 m.
m or less. Accordingly, the outer diameter dimension A of the flange portion 31, the lower portion of the flange portion 31, and the body member 3
0, that is, the difference from the outer diameter B of the lower neck portion 33 is 6.4.
mm, that is, it is difficult to reduce the width D of the lower surface of the flange portion 31 to less than 3.2 mm in actual container processing.

Therefore, applying the latter foamed heat insulating paper container to a cup holder of an automatic machine that is actually operating in conformity with the former commercially available heat insulating paper container requires a dimension. There is a problem that the following inconveniences occur due to the difference. When the container is designed and manufactured by adjusting the outer diameter of the flange portion of the foamed heat insulating paper container to the dimension between the positioning pins 42 of the cup holder 40 and setting the dimension to 96 mm, the outer diameter dimension of the neck lower part 33 is obtained. B becomes 89.6 mm, which is smaller than the diameter 92 mm of the receiving hole 41 of the cup holder 40, and rattling occurs at the position of the cup holder. On the other hand, the lower neck 33
When the outer diameter B of the flange portion 31 is designed and manufactured according to the diameter b of the receiving hole 41 of the cup holder 40, the outer diameter A of the flange portion 31 becomes too large than 97 mm, and the position of the cup holder 40 is made of foamed heat insulating paper. There is a problem that the automatic operation cannot be performed smoothly with the cup holder due to the inclination of the container.

In consideration of the above problems, a cup holder for an automatic machine may be designed and manufactured in conformity with the latter foamed and heat-insulating paper container. For this purpose, a cup holder having a new dimension must be designed. Must be made, not economical. Therefore, there is a demand for designing and manufacturing a new foam-insulated paper container that is compatible with an automatic machine that is already in operation. In view of the above problems and demands, the present invention relates to the latter foamed heat insulating paper container, which is used for filling the contents of the former heat insulating paper container which is currently actually produced, and for sealing the sealing lid. To provide a new foamed and heat-insulating paper container that can be applied to running automatic machines.

[0007]

For this purpose, in the present invention, a high density thermoplastic synthetic resin film is laminated on the inner surface of a base paper, and a low melting point thermoplastic synthetic resin film is laminated on the outer surface of the base paper. The body has a flange portion at the upper edge of the opening of the body member, the bottom is incorporated and integrated into a cup, and heated to foam the low melting point thermoplastic synthetic resin film on the outer surface. In a paper container, the flange portion is forcibly processed to have a square cross section, and the outer diameter A of the flange portion and the outer diameter B of the boundary portion between the lower portion of the flange portion and the body member, that is, the outer diameter B of the lower portion of the neck. A heat-insulating paper container characterized in that the difference is formed to be 6 mm or less. The inner winding end of the flange portion, which has been forcibly machined into a square cross section, is overlapped with the upper portion of the flange portion to form a double structure at the upper portion of the flange portion. The thickness of the body member made of the raw material is set to 0.4 mm or more. The thermoplastic synthetic resin film is a polyethylene film.

[0008]

Embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 10 denotes a body member of the container body, and an upper opening portion 12 has an outwardly facing flange portion 11.
The bottom 14 is incorporated in the lower part of the body member 10.
The body member is obtained by laminating a high melting point thermoplastic synthetic resin film 22, preferably a polyethylene film, on the inner surface of a base paper 21, and laminating a low melting point thermoplastic synthetic resin film 23, preferably, a polyethylene film on the outer surface of the base paper. And has a printed layer 24 on its outer surface.
The low-melting thermoplastic synthetic resin film 23 is heated and foamed. Although the body member 10 has a four-layer structure as described above, the thickness of the raw material before foaming is 0.4 m in order to exhibit good heat insulation in the foamed state.
m or more.

As shown in FIGS. 1 and 2, the flange portion 11 is forcibly machined into a rectangular cross section, and the inner winding end 15 is overlapped on the upper portion 13 of the flange portion 11. 13 has a double structure.
In the present invention, the flange portion 11 of the upper opening 12 is provided.
And the difference between the outer diameter A of the lower portion 14 of the flange portion 11 and the boundary portion between the body member 10, that is, the outer diameter B of the lower neck portion 16, is 6 mm or less. That is, the width D of the lower portion 14 of the flange portion 11 is set to 3 mm or less.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The applicant made the following cup-shaped foam-insulated paper container. The base paper 21 constituting the body member 10
g / m ² paper, a high-melting polyethylene film 22 having a thickness of 40 μm is laminated on the inner surface thereof, and a low-melting polyethylene film 23 having a thickness of 60 μm is laminated on the outer surface of the base paper 21 to have a thickness of 0.44 mm. The raw material of the body member was constructed. A cup-shaped body member 10 is formed from this body member raw material, the bottom 14 is incorporated and integrated, the upper opening portion 12 is provided with a flange portion 11, and the flange portion 1 is provided.
1 was forcibly machined into a square cross section. Then, the container was heated to foam the low melting point polyethylene film 23.
In this foamed state, a foamed heat insulating paper container having a body member thickness of 0.8 mm was completed. The dimensions of each part of this prototype foamed and heat-insulating paper container were as follows. Outer diameter A of flange 11 A 96.0 mm Inner diameter E of upper opening 12 90.0 mm Width C of upper part 13 of flange 11 C 3.0 mm Height F of flange 11 2.5 mm Width D of lower part of flange 11 2.5 mm Thickness of body member 10 0.8 mm Outer diameter B of neck lower part 16 91.0 mm This prototype was applied very smoothly when run on an automatic machine that was already running.

[0011]

As described above, the foam-insulated paper container of the present invention is suitable for a cup holder of an automatic machine that is already in operation, and can be used without changing the dimensions of the cup holder. Without designing a new holder,
Has an applicable effect. Because the shape of the flange part is forcibly processed into a square cross section, higher stability is obtained in the state of being placed in a cup holder, compared to a conventionally known container with a round flange part, and the seal width Is large, so that the sealing performance is good and the pressure resistance of the upper part of the container can be increased. Furthermore, when the inner winding end of the flange portion is overlapped with the upper portion of the flange portion to form a double structure, the strength of the flange portion can be further increased, and the strength of the entire container can be increased. Further, when the thickness of the body member of the raw material is 0.4 mm or more, the strength and heat insulation of the container can be practically sufficiently maintained. In addition, when the thermoplastic synthetic resin film is made of polyethylene film, the molding process of the container can be facilitated and the container can be made compatible with food containers.

[Brief description of the drawings]

FIG. 1 is a half sectional front view showing an embodiment of the heat insulating paper container of the present invention.

FIG. 2 is an enlarged sectional view showing a flange portion and an upper portion of a body portion continuous with the flange portion of the embodiment of the heat insulating paper container of the present invention.

FIG. 3 is a half sectional front view of a conventionally known heat insulating paper container.

FIG. 4 is a plan view of a cup holder operating in the past.

FIG. 5 is a sectional view of the cup holder taken along the line AA in FIG. 4;

DESCRIPTION OF SYMBOLS 10 Body member 11 Flange part 12 Upper opening part 13 Upper part 14 Lower part 15 Inner winding part 16 Neck lower part 21 Base paper 22 High melting point thermoplastic synthetic resin film 23 Low melting point thermoplastic synthetic resin film 24 Printing layer A Outer diameter of the flange part B Outer diameter of the lower part of the neck C Width of the upper part of the flange part D Width of the lower part of the flange part E Inner diameter of the upper opening F Height of the flange part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiromi Watanabe 3-4-2 Kunikubo, Fuji-shi, Shizuoka Prefecture Inside Sanyo Pax Co., Ltd. No. 21 Inside Sanyo Pax Co., Ltd. (72) Yoshihiro Yamada 3-4-2 Kunikubo, Fuji-shi, Shizuoka Prefecture Inside Sanyo Pax Co., Ltd. (72) Noboru Sakata Inventor Noboru Nishinakajima, Yodogawa-ku, Osaka City No. 1-1, Nissin Foods Co., Ltd. F term (reference) 3E067 AA11 AB01 AC01 BA02A BA07A BB01A BB15A BB25A BC03A CA18 EA35 EE02 FA01 GA11 GD06

Claims (4)

[Claims] A body member is formed of a raw material obtained by laminating a high-density thermoplastic synthetic resin film on an inner surface of a base paper and laminating a low-melting thermoplastic synthetic resin film on an outer surface of the base paper. A heat-insulating paper container having a flange at an edge, incorporating a bottom to form a cup by integrating, heating and foaming the low-melting thermoplastic synthetic resin film on the outer surface, wherein the flange is Is forcibly machined into a rectangular cross section, and the difference between the outer diameter A of the flange portion and the outer diameter B of the boundary portion between the lower portion of the flange portion and the body member, ie, the lower portion of the neck, is set to 6 mm or less. A heat-insulating paper container characterized by the above-mentioned. 2. The heat-insulating paper according to claim 1, wherein an inner winding end of the flange portion, which has been forcibly machined into a square cross section, is overlapped with an upper portion of the flange portion so that the upper portion of the flange portion has a double structure. Container. 3. The thickness of the body member of the raw material is 0.4 mm.
The heat-insulating paper container according to claim 1 or 2, which is configured as described above. 4. The heat insulating paper container according to claim 1, wherein said thermoplastic synthetic resin film is a polyethylene film.