JP2001072038A - Thermal insulating paper cup and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermal insulating paper cup in which paper is a major raw material for it, it has an easy discarding characteristic, an easy combustion characteristic and further it has no possibility to produce odor and to provide a thermal insulating paper cup manufacturing method. SOLUTION: The lower segment of a paper cylinder 20 is formed with a curved segment 21 which is curved inwardly under application of pressure and/or heating and pressure. The lower end of the curved segment is formed with a cylindrical leg 23 having some protrusion notches equally spaced apart, extending downwardly and fixed to the outer surface of an annular leg 14. The cylinder is fitted to a barrel 11 of a paper cup main body 10, the upper end of the cylinder is contacted with the lower edge of an edge segment 13 and fixed there. The cylindrical leg 23 at the lower end of the cylinder formed with a curved segment is adhered to and fixed to the outer surface of the annular leg 14 at the lower edge of the leg at the paper cup main body, and a thermal insulating space layer 22 is formed between the barrel segment of the paper cup main body and the paper cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating cup made of paper for accommodating instant noodles and the like and a method for producing the same.
The present invention relates to a paper heat-insulating cup for so-called instant food or instant beverage which can be poured and consumed as it is with boiling water, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a heat-insulating cup for pouring hot water into a container such as instant noodles and eating the same, for example, a plastic cup molded of expanded polystyrene resin or the like, a corrugated paper on the outer wall of a water-resistant paper cup body. There is also known a paper cup or the like in which an air heat insulating layer is formed by adhering thin paper over a corrugated paper and further pasting thin paper over the corrugated paper.

[0003] However, although cups made of foamed resin are excellent in heat insulating properties, they have high combustion calories, have problems in incineration and disposal, and furthermore, consumption behavior accompanied by increasing environmental awareness of consumers. As a result, there is a demand for an easily disposable and easily combustible container which can replace the foamed resin.

A paper cup formed by winding a corrugated paper or a thin paper around a paper cup to form an air heat insulating layer has no problem in heat insulation, but has a poor appearance and a decrease in work efficiency due to an increase in the number of work steps. There is a problem that the adhesive is immediately peeled off due to repulsion due to the rigidity of the paper due to being wound and adhered, and that a temporary fixing is required for a certain time after the adhesion.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems relating to the heat insulating cup, and is made of paper as a main material, and has an easy disposal property, an easy incineration property and an odor generation. It is an object of the present invention to provide a heat insulating cup made of paper and a method of manufacturing the same without fear of occurrence.

[0006]

Means for Solving the Problems A first invention of the present invention is:
A paper cup body having a body portion and a bottom portion, an opening portion having an edge portion curled outward, and an annular leg formed at a joint between the body portion and the bottom portion, and fitted into the outside of the body portion of the paper cup body. And a lower portion of the paper cylinder, the lower portion of the paper cylinder having a curved portion that is bent inward by pressure and / or heat and pressure, and a lower end of the curved portion. A cylindrical leg portion extending downward and fixed to the outer surface of the annular leg portion is formed at regular intervals, and is fitted into the body portion of the paper cup body. The cylindrical leg at the lower end of the cylindrical body, which is in contact with the lower edge of the lip of the paper cup and has a curved portion, is adhered and fixed to the outer surface of the annular leg at the lower edge of the body of the paper cup body. A heat insulating cup made of paper, wherein a heat insulating space layer is provided between the body of the paper cup main body and the paper cylinder.

In a second aspect of the present invention, there is provided a paper cup body having a body portion and a bottom portion, the opening portion having a rim portion curled outward, and having an annular leg portion at a joint between the body portion and the bottom portion. Forming, covering the edges of the paper cup body from the rim to the annular edge of the body, overlapping and adhering the edges of substantially fan-shaped blanks, forming a sleeve-shaped paper cylinder, sleeve-shaped The lower part of the paper cylinder is formed by drawing with a male mold and a female mold which are engaged with each other, and the peripheral edge is divided into a plurality of parts and uneven steps are formed at equal intervals, and the curved surface and the curved surface are formed. The lower end extends downward and is formed into a cylindrical body having a cylindrical leg fixed and adhered to the outer surface of the annular leg. The draw-forming step is to cover the body of the paper cup body with the paper-made cylindrical body subjected to the draw forming. Glue the outside of the annular leg of the paper cup body to the bottom of the paper cylinder, An integrated process of integrating a paper body and a paper cylinder having a curved portion, and providing an insulating space layer between the body of the paper cup body and the paper cylinder to form a paper insulation cup; Are performed in the above-described order.

In a third aspect of the present invention, there is provided a paper cup comprising a body portion and a bottom portion, an opening portion having an edge portion curled outward, and an annular leg formed at a joint portion between the body portion and the bottom portion. A paper heat insulating cup comprising a main body and a paper cylinder fitted to the outside of the body of the paper cup body, wherein a lower portion of the paper cylinder is bent inward by pressurization and / or heat and pressure. The lower part of the curved part is provided with a radially extending vertical ruled line along the entire circumference, and a cylindrical leg extending downward and fixed to the outer surface of the annular leg is formed. The upper end of the cylindrical body is fitted into the body of the paper cup body, and is fixed in contact with the lower edge of the rim of the body. The cylindrical leg at the lower end of the curved body forms the body of the paper cup body. Adhesively fixed to the outer surface of the annular leg at the lower edge of the paper cup. A paper insulation cup, characterized in that a layer.

In a fourth aspect of the present invention, there is provided a paper cup body having a body portion and a bottom portion, an opening portion having a rim portion curled outward, and having an annular leg portion at a junction between the body portion and the bottom portion. Forming step, covering the edges of the substantially fan-shaped blank provided with a number of radial ruled lines at the bottom, covering the edges from the rim of the body of the paper cup body to the annular rim, gluing them together, forming a sleeve-shaped paper The step of manufacturing a cylindrical body, the lower part of the sleeved paper cylindrical body is drawn by a male mold and a female mold, and the curved surface and the lower end of the curved surface extend downward and are adhered to the outer surface of the annular leg. Forming step of forming a cylindrical body having a cylindrical leg fixed to the paper cup, covering the body of the paper cup body with the drawn cylindrical body, and forming the outside of the annular leg of the paper cup body and the paper cylinder. Adhering the lower part of the body, the paper cup body and the paper cylinder having the curved part are integrated A process of providing an insulating space layer between the body of the paper cup body and the paper cylinder to form a heat insulating cup made of paper, and performing the above steps in the order described above; Is the way.

As described above, according to the present invention, since the curved portion which bends inward is provided at the lower portion of the paper cylinder, a heat insulating space layer is provided between the body of the paper cup body and the paper cylinder. It is formed. In addition, the lower part of the paper cylinder is drawn by a male die and a female die which are engaged with each other and have an uneven step having a height of 2 mm or less formed at equal intervals by dividing the periphery into 10 to 64 parts. The wrinkles generated thereby are absorbed by the uneven steps, and the lower part of the paper cylinder has a curved portion and a leg that are easy to look good.

Further, by forming radial vertical ruled lines all around the lower portion of the paper cylinder, the male cylinder and the female mold are drawn and formed on the paper cylinder to form a curved portion. The wrinkles that occur due to this are absorbed by the ruled lines that are regularly provided, so that it is possible to obtain a curved portion and a leg that are reasonably good in appearance.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments. The paper heat-insulating cup of the present invention includes, for example, as shown in FIG. 1, a body 11 and a bottom 12, an opening 13 having an edge 13 curled outward, and a joint between the body and the bottom. A paper cup body 10 having an annular leg 14 formed thereon;
And a paper cylinder 20 fitted to the outside of the body of the paper cup body.

The paper cup body 10 has a basis weight of 170 to 310 for both the body member forming the body and the bottom member forming the bottom.
It can be produced by setting a low density polyethylene resin having a thickness of about 20 to 40 μm on both sides or one side of a paper cup base paper of about g / m ^2, and setting the same on a general paper cup molding machine.

The paper cylinder 20 has a basis weight of 250 to 380 g.
First, a blank 20a as shown in FIG. 2 is prepared by punching into a fan shape having a predetermined size using a paperboard such as a coated ball, a white liner, and a cup base paper of about / m ² . Or,
A blank 20b may be manufactured by punching out a fan of a predetermined size and forming a large number of vertical ruled lines a, a,... Radially as shown in FIG. When cup base paper is used, the pulp is easily stretched and has good moldability, so that the curved portion is easily formed.

Next, both ends of the paper cylinder blank 20a or the paper cylinder blank 20b are overlapped with each other.
It is adhered via an ethylene-vinyl acetate resin-based emulsion adhesive and processed into a cylindrical shape.

A cylindrical body processed into a cylindrical shape is pressed and / or heated and pressed using a male mold and a female mold, and a curved portion 21 bent inward and a lower end of the curved portion are formed at a lower portion of the cylindrical body. Extends downward to form a paper cylinder 20 having a cylindrical leg 23 that is adhered and fixed to the outer surface of the annular leg.

At this time, when the paper cylinder blank 20a (blank having no radial ruled line under the blank) is used, the peripheral edge is 10 to 64 as shown in FIG.
Steps 32, 33 of unevenness with a height of 2 mm or less divided at equal intervals
By using the male mold 30 and the female mold 31 having the above, the paper wrinkles generated at the time of drawing can be absorbed, and the curved portion and the cylindrical leg can be formed easily and neatly.

When using a paper cylinder blank 20b (a blank having radial ruled lines below the blank), a male mold 40 and a female mold 41 whose peripheral edges are smooth as shown in FIG. Even when used, a large number of radial ruled lines are provided at the bottom of the cylindrical body that forms the curved part, so it is possible to absorb wrinkles that occur in the blank due to the drawing forming process, A bend and a tubular leg can be formed.

The fitting of the paper cylinder 20 into the paper cup body 10 is performed as follows. That is, the paper cup body is fitted into the paper cylinder from the bottom, and the upper end of the paper cylinder is fixed by contacting below the lip 13 of the paper cup body, and the lower end of the paper cylinder is fixed to the paper cup body. And made into contact with the annular leg portion of the present invention to obtain the paper heat insulating cup of the present invention. As a method of fixing the paper cylinder and the paper cup main body, a method of bonding one or both of the upper end and the lower end of the paper cylinder to the paper cup main body with an adhesive is reliable.

[0020]

EXAMPLES Examples of the present invention will be described below more specifically. Example 1 First, a polyethylene processed paper in which a low-density polyethylene resin having a thickness of 30 μm was applied to one side of a cup base paper having a basis weight of 270 g / m ² was prepared and cut into predetermined dimensions to obtain a body member. Further, a polyethylene processed paper in which a low-density polyethylene resin having a thickness of 30 μm was applied to one side of a cup base paper having a basis weight of 210 g / m ² was prepared and cut into predetermined dimensions to obtain a bottom member.

The body member and the bottom member are set on a general paper cup forming machine, and the height is 104 mm and the diameter is 139 m.
m, base diameter: 104 mm, height (depth) of the annular leg: 10
mm paper cup body was molded.

Separately, a fan-shaped paper cylinder blank 20a having a predetermined size was prepared using a coated ball having a basis weight of 270 g / m ² (see FIG. 2).

Both ends of the fan-shaped cylindrical blank 20a were overlapped and bonded via an ethylene / vinyl acetate resin-based emulsion adhesive to form a sleeve.

Subsequently, a cylindrical blank formed into a sleeve shape is formed by using a male mold 30 and a female mold 31 in which irregularities 32 and 33 having a height of 2 mm are formed at equal intervals on the periphery as shown in FIG. Heated and pressurized, curved portion 21 with the lower part of the cylinder bent inward
The lower end of the curved portion extends downward and is formed into a tubular leg portion 23 which is adhered and fixed to the outer surface of the annular leg portion, thereby forming the paper cylinder 20. The clearance between the male and female molds is preferably about ± 30% of the paper thickness.

Next, the paper cup body 10 is fitted into the paper cylinder 20 from the bottom, and the upper end of the paper cylinder is brought into contact with the lower edge 13 of the paper cup body to be fixed. The cylindrical leg 23 at the lower end of the paper cup is bonded to the outside of the annular leg of the paper cup body via an ethylene / vinyl acetate resin adhesive,
The paper heat insulation cup of Example 1 having the heat insulation space layer 22 between the paper cup body and the paper cylinder was used (see FIG. 1).

<Example 2> A paper heat insulating cup of Example 2 was manufactured using the same material and method as in Example 1 except that a paper cylinder was manufactured using the paper cylinder blank described below. .
That is, using the same coated ball having a basis weight of 270 g / m ² as in Example 1, a fan-shaped paper cylinder blank 20b having a predetermined size was produced. At this time, ruled lines a having a length of 12 mm were provided radially over the entire lower peripheral edge at intervals of 5 mm upward from the lower edge of the cylindrical blank forming the curved portion (FIG. 3).
reference).

Both ends of the fan-shaped paper cylinder blank 20b were overlapped and bonded to each other via an ethylene-vinyl acetate resin-based emulsion adhesive in the same manner as in Example 1 to form a sleeve.

Subsequently, the cylindrical blank formed into a sleeve shape is heated and pressurized using a male mold 40 and a female mold 41 as shown in FIG. 5, so that the lower portion of the cylindrical body is bent inward and the curved portion 21 is bent. The lower end of the portion extends downward and is formed into a cylindrical leg portion 23 which is adhered and fixed to the outer surface of the annular leg portion, whereby the paper cylinder 20 can be formed. Note that the clearance between the male and female molds is ± 3
About 0% is appropriate.

Next, as in the first embodiment, the paper cup body 10 is fitted into the paper cylinder 20 from the bottom, and the upper end of the paper cylinder is brought into contact with the lower edge 13 of the paper cup body. It is fixed, and the cylindrical leg 23 at the lower end of the paper cylinder is bonded to the outside of the annular leg of the paper cup body via an ethylene / vinyl acetate resin-based adhesive, so that the heat is insulated between the paper cup body and the paper cylinder. The paper heat insulating cup of Example 2 having the space layer 22 was used (see FIG. 1).

Example 1 and Example 2 thus produced
The instant noodles were placed in a paper insulated cup of No. 1 and poured into boiling water and allowed to stand for 3 minutes. The body of the cup was grasped with fingers or the like, but could be easily held by hand.

[0031]

As described above, the heat insulating cup made of paper of the present invention can be composed of two parts, a paper cup and a paper cylinder, and the paper cylinder is only attached and pressed, so that the working efficiency is good and stable. Inexpensive manufacturing is possible. Even when the rigidity of the paper to be used is increased, a good-looking curved portion can be obtained by increasing the number of ruled lines or by using a male mold and a female mold having an uneven step on the periphery. Since the bottom side is formed into a curved surface, it is rich in rigidity and excellent in cosmetics.

[Brief description of the drawings]

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

FIG. 2 is an explanatory plan view showing an example of a paper cylinder blank used in the paper heat insulating cup of the present invention.

FIG. 3 is an explanatory plan view showing another example of a paper cylinder blank used for the paper heat insulating cup of the present invention.

FIG. 4 is a schematic explanatory view showing an example of the shapes of a male mold and a female mold used for drawing of a paper cylinder used for the paper heat insulating cup of the present invention.

FIG. 5 is a schematic explanatory view showing another example of the shapes of a male mold and a female mold used for drawing of a paper cylinder used for the heat insulating cup made of paper of the present invention.

[Explanation of symbols]

 10 {paper cup body 11} trunk 12} bottom 13} lip 14} annular leg 20} paper cylinder 20a, 20b {paper cylinder blank 21} curved part 22} Insulated space layer 23 {circular legs 30, 40} male type 31, 41 {female type 32, 33} uneven steps a} ruled line

Claims (4)

[Claims] 1. A paper cup body comprising a body and a bottom, wherein the periphery of the opening has an outer edge curled outward, and an annular leg is formed at a joint between the body and the bottom. A paper heat insulating cup composed of a paper cylinder fitted to the outside of the body, wherein a lower portion of the paper cylinder has a curved portion that is bent inward by pressurization and / or heat and pressure. At the lower end of the curved portion, there is formed a cylindrical leg portion provided with uneven steps at equal intervals and extending downward and fixed to the outer surface of the annular leg portion. The cylindrical body is fitted into the body of the paper cup body, The upper end of the cylinder is fixed in contact with the lower edge of the lip of the body, and the cylindrical leg at the lower end of the cylinder having a curved portion is attached to the outer surface of the annular leg at the lower edge of the body of the paper cup body. A heat insulating space layer provided between the body of the paper cup body and the paper cylinder body, the heat insulating space layer being provided between the body and the paper cylinder. Up. 2. A process for forming a paper cup body comprising a body and a bottom, wherein the periphery of the opening has an outer edge curled outward, and wherein the body and the bottom have an annular leg at the joint. Covering from the rim of the trunk to the annular rim,
A process in which the edges of the substantially fan-shaped blanks are overlapped and adhered to each other to form a sleeve-shaped paper cylinder, and the lower portion of the sleeve-shaped paper cylinder is divided into a plurality of peripheral edges to form uneven steps at regular intervals. Formed by drawing with a male mold and a female mold that are engaged with each other, and a curved surface and a lower end of the curved surface extend downward and are adhered and fixed to the outer surface of the annular leg. Draw-forming process to form a cylinder having a paper cup The paper-made cylinder that has been subjected to the draw-forming is placed over the body of the paper cup body, and the outside of the annular leg of the paper cup body is bonded to the lower part of the paper-made cylinder. And a paper cylinder having a curved portion, and an integration step of providing a heat insulation space layer between the body of the paper cup body and the paper cylinder to form a heat insulation cup made of paper. A method for producing a heat insulating cup made of paper, which is performed in order. 3. A paper cup body comprising a body and a bottom, wherein the periphery of the opening has an edge curled outward, and an annular leg is formed at a joint between the body and the bottom. A paper heat insulating cup comprising a paper cylinder fitted to the outside of the body, wherein a lower portion of the paper cylinder has a curved portion which is bent inward by pressurization and / or heat and pressure. At the lower end of the curved portion, a radially extending ruled line is provided over the entire circumference, and a downwardly extending cylindrical leg fixed to the outer surface of the annular leg is formed, and the cylindrical body is attached to the body of the paper cup body. The upper end of the cylindrical body is fixed in contact with the lower edge of the lip of the body, and the cylindrical leg at the lower end of the cylindrical body having a curved portion is an annular leg at the lower edge of the body of the paper cup body. It is characterized in that it is adhered and fixed to the outer surface of Insulated paper cup. 4. A process for forming a paper cup body comprising a body and a bottom, wherein the periphery of the opening has an edge curled outward and an annular leg at a joint between the body and the bottom. Covering from the rim of the trunk to the annular rim,
A process in which the edges of substantially fan-shaped blanks provided with a number of radial ruled lines at the bottom are overlapped and adhered, and the sleeve is formed into a paper cylinder.The lower part of the sleeve-shaped paper cylinder is defined as a male mold. Draw forming process using a female die to form a cylindrical body having a curved surface and a cylindrical leg extending downward at the lower end of the curved surface and adhered and fixed to the outer surface of the annular leg. The paper cylinder body is placed over the body of the paper cup body, and the outside of the annular leg of the paper cup body and the lower part of the paper cylinder are adhered to integrate the paper cup body with the paper cylinder body having the curved portion. A heat insulating space layer is provided between the body of the paper cup body and the paper cylinder to form a heat insulating cup made of paper. The above steps are performed in the above order. Production method.