JP2000109144A - Paper heat-insulation container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper heat-insulation container consisting of two members not being deformed as held with fingers and the like and having a superior heat-insulation effect. SOLUTION: The paper heat-insulation container 1 is formed of a trunk part 11 and bottom part 12, and also composed of a paper cup body 10 having a mouth peripheral part 13 with its opening periphery curled outward and a paper heat-insulation sheet 20 covering the trunk part and being adhered to the cup body 10. In this case, a plurality of pieces of outwardly projected vertical projections 15 are provided at predetermined distances on only upside of the paper cup body, and heat-insulation space layers 16 are defined between the part except the vertical projections and the paper heat-insulation sheet 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper heat insulating container for storing instant noodles and the like, and more particularly, to a paper heat insulating material for so-called instant food or instant beverage which can be poured and consumed as it is by pouring boiling water. For containers.

[0002]

2. Description of the Related Art Conventionally, as a paper heat insulating container for pouring hot water into a container such as instant noodles and eating it, for example, embossed paper having a large number of uneven patterns formed on the outer wall of a water-resistant paper cup body is used. 2. Description of the Related Art There is known a paper-made heat-insulating container in which a heat insulating space layer is formed by pasting and then pasting a paperboard over an embossed paper.

[0003] However, the above-mentioned heat insulating container made of paper is composed of a paper cup main body, embossed paper and paperboard, so that further cost reduction is required.
Further heat insulation is required. On the other hand, when the surface of the container is made of paper, the smoothness of the surface of the container increases, so that there is a problem that the container becomes slippery when gripped with fingers or the like.

[0004] Therefore, the inventors worked diligently on development research,
On the body of the paper cup body, a plurality of vertical ridges protruding outward except for the vicinity of the upper and lower edges are provided, and a heat insulating space layer is formed between the portion other than the ridges of the body and the paper heat insulating sheet. Developed a heat insulation container consisting of a paper cup body and a paper heat insulation sheet provided with a convex shape that protrudes inward on the paper heat insulation sheet and that intersects with the ridges provided on the trunk. Japanese Patent Application 1
No. 0-242150.

[0005]

Further, when observing the usage of a paper insulated container by consumers, it is common practice to grip the upper side of the container with hot water in the container. There was found. From this, the inventors have concluded that it is effective to provide a large heat insulating space layer above the body of the container, and as one of the means, project outwardly above the body of the paper cup body. Developed a heat-insulating container consisting of a paper cup body and a paper heat-insulating sheet provided with at least one annular ridge to be provided, and a heat-insulating space layer provided between a portion other than the ring-shaped convex ridge of the body and the paper heat-insulating sheet. Japanese Patent Application Hei 10-2522
No. 43 was provided.

The present invention proposes another configuration based on this means, and comprises two members, a paper cup main body and a heat insulating sheet, and does not deform even when the container is gripped with fingers or the like, and has an excellent heat insulating effect. It is an object to provide a heat insulating container made of paper.

[0007]

Means for Solving the Problems A first invention of the present invention is:
A paper cup made of a paper cup body having a body and a bottom, and having a lip curled outward at the periphery of the opening, and a paper heat insulating sheet covering the body and being attached thereto. A heat insulating container, provided only a plurality of vertical ridges protruding outward at predetermined intervals only above the body of the paper cup main body, at a predetermined interval, between the portion other than the vertical ridges and the paper heat insulating sheet. This is a paper heat insulation container provided with a heat insulation space layer.

According to a second aspect of the present invention, in the paper heat insulating container according to the first aspect, an annular convex ridge projecting outward is provided below the vertical convex ridge, and the vertical convex ridge and the annular convex ridge are provided. This is a paper heat insulating container provided with a heat insulating space layer between portions other than the strip and the paper heat insulating sheet.

According to a third aspect of the present invention, in the paper heat insulating container according to the first aspect, the vertical ridge provided above the body portion includes:
This is a paper heat insulating container provided at a height of about 1/3 from the top of the paper cup body.

According to a fourth aspect of the present invention, in the second or third aspect, the paper heat insulating sheet projects inward and comes into contact with an annular ridge provided above the body of the paper cup body. This is a paper heat-insulating container provided with one ridge and a second ridge that comes into contact with the vertical ridge.

A fifth invention is the paper heat insulating container according to the fourth invention, wherein the first ridge and the second ridge provided on the paper heat insulating sheet are provided in an annular shape.

[0012]

As described above, according to the present invention, a plurality of outwardly projecting vertical ridges are provided at predetermined intervals only above the body of the paper cup body, and portions other than the vertical ridges are provided. Since the heat insulating space layer is provided between the heat insulating sheet and the paper heat insulating sheet, a paper heat insulating container having an excellent heat insulating effect can be obtained. Further, by providing the annular ridge below the ridge in the vertical direction, the rigidity of the body of the paper cup body against external force is increased, and the entire circumferential direction of the heat insulating sheet made of paper is in contact with the body of the paper cup body. Therefore, deformation of the heat insulating sheet itself when the container is completed can be prevented, and deformation of the container as a whole can be prevented even if the container is gripped with fingers or the like. The ring-shaped ridge is located at a height of about 1/3 from the top of the torso, so that the container is the easiest to hold the container. And fingers and the like do not become hot.

[0013] Further, the paper heat insulating sheet protrudes inward,
In addition, when the first ridge contacting the annular ridge provided above the body of the paper cup body and the second ridge contacting the vertical ridge are provided, portions other than the annular ridge of the body may be provided. The heat-insulating space layer provided between the portions other than the first ridge and the second ridge of the paper heat-insulating sheet becomes thicker, and a paper heat-insulating container having a further heat-insulating effect is obtained.

Further, since it is composed of the two members of the paper cup main body and the paper heat insulating sheet, a relatively inexpensive paper heat insulating container with a simple manufacturing process can be obtained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments. As shown in FIG. 1, for example, a paper heat insulating container according to the present invention comprises a body 11 and a bottom 12 and a paper cup body 10 having a lip 13 whose opening rim is curled outward.
And a heat insulating sheet 20 made of paper that covers the body and is attached to the body.
It is composed of

The paper cup body 10 has a basis weight of 170 to 31 for both the body member forming the body and the bottom member forming the bottom.
Made using a general paper cup molding machine using polyethylene processed paper obtained by applying a low density polyethylene resin (LDPE) to the both sides or one side of a cup base paper of about 0 g / m ² by a melt extrusion method at about 20 to 40 μm. can do.

At the time of molding the paper cup body, at the same time as molding, a width of about 1 to 6 mm, preferably 4 to
5 mm, height about 0.1 to 2 mm, preferably 0.5
One annular ridge 14 projecting outwardly by about 0.7 mm is provided over the entire circumference.

Also, between the edge 13 and the annular ridge 14, the end overlaps the annular ridge and is continuous with the annular ridge, and has a width of about 1 to 6 mm, preferably 4 to 5 mm. Is about 0.1 to 2 mm, preferably 0.5 to 0.7 mm
Are provided at predetermined intervals at a predetermined interval. In addition, the annular ridge 14 and the vertical ridge 1
5 does not necessarily have to be continuous.

The ridges provided on the body of the paper cup body may not be provided with the annular ridges 14 but may be only the ridges 15 in the vertical direction.

The position where the annular ridge 14 is provided is preferably within 1/2, and preferably within 1/3 from the top of the height of the paper cup body. This position is the position where the possibility of gripping the container with fingers or the like is the highest, and the thermal insulation space layer 16 existing in that portion is always gripped, so that the heat insulating property works effectively.

The paper insulation sheet 20 has a basis weight of 80 to 12
It is made of a paperboard such as a white liner of about 0 g / m ² , a coated ball, bleached kraft, and ivory, and has a substantially fan-shaped shape large enough to cover the body of the paper cup body.

In addition, on the surface of this sheet, a convex ridge projecting inward and coming into contact with an annular ridge 14 or a vertical ridge 15 provided on the body of the paper cup body, for example, as shown in FIG. As shown in FIG.
A second ridge 22 may be provided so as to intersect with the ridge 21 or the vertical ridge 15.

The width of the first ridge 21 and the second ridge 22 is 0.5
~ 6mm, preferably 2-3mm, height is 0.1 ~
The thickness is preferably about 2 mm, preferably 0.2 to 0.5 mm from the viewpoint of preventing the occurrence of pinholes during the processing of the ridges.

When ridges are provided on the heat insulating sheet 20 made of paper, as shown in FIG.
６6 mm, height: 0.1 to 2 mm ridges are provided diagonally from upper right to lower left (or from upper left to lower right), or are provided at approximately equal intervals from upper right to lower left. From the top of a ridge of the same size, the same ridge is struck crosswise from the upper left to the lower right to form a diagonal checkered ridge (see FIG. 4), or a ridge of the same size is formed in a horizontal strip. This band is formed into ridges distributed at regular intervals at an interval of about 5 mm (see FIG. 5), or a plurality of ridges having the above dimensions as shown in FIG. In addition, a plurality of ridges may be stacked at substantially equal intervals in the up-down direction on the ridges to form a cross-girder ridge.

The processing of the ridges into the paper heat insulating sheet does not increase the cost because the ridges can be formed at the same time as punching the paper heat insulating sheet one by one from the paperboard. Further, each ridge can be applied to the edge of the sheet, or can be applied only to the inside excluding the edge.

Finally, one annular ridge 1 protruding outward.
When the heat insulating sheet 20 made of paper is adhered to the body 11 of the paper cup body provided with the four and the plurality of vertical ridges 15,
The paper heat insulating container 1 in which the heat insulating space layer 30 is formed between the portion other than the annular ridge of the trunk and the heat insulating sheet made of paper can be manufactured (see FIG. 1).

The method of attaching the paper heat insulating sheet to the paper cup main body includes the following: a method in which the paper heat insulating sheet is wrapped around the body of the paper cup main body; There are two methods in which the edges of the heat insulating sheet are overlapped and adhered, that is, a fan-shaped heat insulating sheet is formed into a tubular shape in advance, and then fitted and adhered to the paper cup body. Either method may be used.

Further, the heat insulating sheet made of paper may be provided with a ridge projecting outward. As the ridge, a dot, a line, a lattice pattern, a cross-girder, or the like can be selected. By providing the ridges, the sensible temperature when the container is gripped with fingers or the like can be lowered, and also functions as a non-slip.

[0029]

EXAMPLES Examples of the present invention will be described below more specifically. <Example 1> First, using an ordinary paper cup molding machine, using a processed paper in which LDPE having a thickness of 20 μm was applied to both sides of a cup base paper having a basis weight of 260 g / cm ² , the periphery of the opening was curled outward. 5 mm wide on the body at a position 30 mm (approximately 1/3) from the top of the paper cup height
m, an annular protruding ridge 14 having a height of 0.7 mm is provided. Further, between the annular protruding portion 14 and the rim portion 13, the end portion overlaps the annular protruding portion, and the annular protruding portion is formed. A plurality of longitudinally extending ridges 15 continuous with the ridges are provided at predetermined intervals at equal intervals. The opening diameter is 95 mm, the bottom diameter is 65 mm, the height is 11
A paper cup body 10 of 0 mm was produced.

The size of the vertical ridge 15 is the same as the size of the annular ridge, that is, a width of 5 mm and a height of 5 mm.
0.7 mm. The width of each ridge was set to 5 mm, in order to obtain a sufficient height without cracking the paper,
This is to make the rising angle gentle.

Separately, using a coated ball having a basis weight of 120 g / cm ² , a substantially fan-shaped paper heat insulating sheet 20 having a predetermined size was punched out.

The heat insulating sheet 20 made of paper is covered around the body 11 of the paper cup body by being wound from below the lip 13 and adhered via an ethylene-vinyl acetate resin emulsion adhesive. The paper heat insulating container 1 of Example 1 provided with a heat insulating space layer 30 between a portion other than the annular convex ridge 14 and the vertical convex ridge 15 and the paper heat insulating sheet 20 (see FIG. 1).

Example 2 As shown in FIG. 2 (b), the paper heat insulating sheet sticks out to the paper heat insulating sheet used in Example 1 and sticks to the body of the paper cup body. In this case, the first ridge having a width of 2 mm and a height of 0.2 mm, which comes into contact with the annular ridge 14 provided on the body so as to overlap therewith, similarly protrudes inward, and contacts the body of the paper cup body. When the heat insulating sheet made of paper is stuck, it comes into contact with the vertical ridge 15 provided on the body so as to intersect, width: 2 mm, height: 0.2 m
m, except that a paper heat insulating sheet provided with a second ridge was used.
Using the same paper cup body as in Example 1, in the same manner as in Example 1, it is wound around the body of the paper cup body so as to be wrapped and adhered, and the annular convex ridge 14 of the body and the vertical projection are formed. The paper heat insulating container 2 of Example 2 provided with the heat insulating space layer 30 between the portion other than the strip 15 and the paper heat insulating sheet 20 (FIG. 2)
(See (a)).

<Example 3> The ridges of the heat insulating sheet made of paper were arranged at substantially equal intervals from the upper right side to the lower left side;
A paper heat insulating container of Example 3 was manufactured using the same material and method as in Example 1 except that the height was 0.2 mm and the ridges 23 were provided obliquely (see FIG. 3).

<Example 4> The ridges of the heat insulating sheet made of paper are applied from the upper left side to the lower right side of the ridges of the third embodiment from above the ridges of the third embodiment.
A paper heat insulating container of Example 4 was manufactured using the same material and method as in Example 1 except that the ridges 24 were formed as oblique lattice stripes (see FIG. 4).

<Example 5> The ridges of the heat insulating sheet made of paper were
The same materials and methods as in Example 1 were used, except that the ridges having a width of 2 mm and a height of 0.2 mm were formed in the form of ridges 25 equally spaced at intervals of 5 mm in a strip shape in the lateral direction. Example 5
(See FIG. 5).

<Example 6> The ridges of the heat insulating sheet made of paper were laid over the ridges of Example 5 at regular intervals of 5 mm in the vertical direction with the same ridges as in Example 5. A paper heat insulating container of Example 6 was produced using the same material and method as in Example 1 except that the ridges 26 were formed in a double-girder shape (see FIG. 6).

In order to evaluate the heat insulating effect of the six types of paper-made heat insulating containers thus prepared, instant noodles were placed in each container, poured into boiling water and allowed to stand for 3 minutes, and the body of the container was grasped with fingers or the like. All containers were easily held by hand.

[0039]

As described above, the paper-made heat insulating container of the present invention comprises:
Since it is composed of the two members of the paper cup body and the paper heat insulating sheet, the cost is reduced because the embossed paper is omitted.
Further, when the paper heat insulating sheet is provided with the ridges, when the body of the container is gripped by a finger or the like, it becomes difficult to slip and the handleability of the container is improved.

[Brief description of the drawings]

FIG. 1 is a partially sectional explanatory view showing an example of a paper heat insulating container of the present invention.

FIG. 2 shows another embodiment of the paper heat insulating container of the present invention.
(A) is a partial cross-sectional explanatory view, and (b) is a plan explanatory view of a paper heat insulating sheet used in this example.

FIG. 3 is an explanatory plan view of a ridge provided on a paper heat insulating sheet of a paper heat insulating container of Example 3.

FIG. 4 is an explanatory plan view of a ridge applied to a paper heat insulating sheet of a paper heat insulating container of Example 4.

FIG. 5 is an explanatory plan view of a ridge applied to a paper heat insulating sheet of a paper heat insulating container of Example 5.

FIG. 6 is an explanatory plan view of a ridge applied to a paper heat insulating sheet of a paper heat insulating container of Example 6.

[Explanation of symbols]

 1, 2 ‥‥ paper insulation container 10 ‥‥ paper cup body 11 ‥‥ trunk 12 ‥‥ bottom 13 ‥‥ lip 14 ‥‥ annular ridge 15 ‥‥ vertical ridge 16 ‥‥ insulation space layer 20 {Insulation sheet made of paper 21} First ridge 22} Second ridge 23, 24, 25

Claims (5)

[Claims] 1. A paper cup body comprising a body and a bottom, and having a rim curled outward at the periphery of the opening, and a paper heat insulating sheet covering the body and being attached thereto. A heat insulating container made of paper, comprising a plurality of vertically projecting ridges projecting outward at predetermined intervals only above the body of the paper cup main body, and a portion other than the vertical ridges and paper. A paper heat insulating container, wherein a heat insulating space layer is provided between heat insulating sheets. 2. The paper-made heat insulating container according to claim 1, wherein an outwardly projecting annular ridge is provided below the vertical ridge.
A paper heat insulating container, wherein a heat insulating space layer is provided between a portion other than the vertical ridge and the annular ridge and a paper heat insulating sheet. 3. The paper heat insulating container according to claim 1, wherein the vertical ridge provided above the body is provided at a height of about one third from the top of the paper cup main body. Paper insulation container. 4. A first ridge projecting inward from the paper heat insulating sheet and contacting an annular ridge provided above a body portion of a paper cup body, and a second ridge contacting a vertical ridge. The heat insulating container made of paper according to claim 2 or 3, further comprising a ridge. 5. The paper-made heat insulating container according to claim 4, wherein the first ridge and the second ridge provided on the paper heat-insulating sheet are provided in an annular shape.