JP2001055278A - Heat-retaining, thermal-insulating container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve rigidity at a trunk part of an inner packaging paper cup by a method wherein an outer packaging paper is wound round the exterior at the trunk part of the cup, and thermal-insulating spaces are formed between the interior of the outer packaging paper trunk whereon sack-pasting is applied and unit surfaces of the cup or ruled line parts sectioning the unit surfaces. SOLUTION: A paper sack 1 is wound round the exterior of a trunk part of a truncated conical paper cup 2 on which ruled lines are provided, and an upper opening of the paper sack 1 is made slightly smaller than the diameter of the outer circumference of a curled part 4 at the upper edge of the paper cup 2 while a lower opening of the paper sack 1 is made slightly larger than the diameter of the outer circumference at the bottom of the paper cap 2. Then, the sack 1 is stuck to the upper and lower ends at the outer circumference of the cup 2 or tops or their vicinities of projected parts formed by the ruled lines at the exterior of the cup 2 with a vinyl acetate adhesive or the like and fixed without displacement that thermal-insulating air layers 5 each in a triangular truss structure are formed between the interior of the sack 1 and the exterior of the cup 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to instant noodles such as instant noodles, containers for foods such as tea, coffee, soup, stew, miso soup, etc. which can be eaten and consumed mainly by pouring boiling water, frozen foods and the like. The present invention relates to a food cooking container that requires heat retention and heat insulation, such as when cooking and thawing a whole container using a microwave oven.

[0002]

2. Description of the Related Art Conventionally, foamed polystyrene containers have been frequently used for the above food containers because of their excellent heat insulation and heat retention, good moldability and workability, and are inexpensive. There is a growing interest in environmental protection and environmental issues, and there is a growing demand for paper-based food containers that can be easily incinerated when disposed of as household waste and that can be biodegraded by microorganisms in the soil. Is coming.

As this type of container mainly composed of a paper substrate, a container obtained by laminating a thermoplastic resin such as polyethylene on at least one surface on a paper substrate is used.
Insulation is low, heat is directly transmitted to the hand holding the container, it is difficult to hold because it is hot, or the heat retention is poor, the temperature of the contents decreases rapidly, or the container softens and the strength of the container decreases. was there.

For the purpose of improving these, for example, in order to prevent the temperature of the contents from being directly transmitted to the finger and to improve the strength of the container, a large number of ribs such as fins are provided on the outer surface of the body of the container. A method is proposed in Japanese Patent Application Laid-Open No. 51-2576. In this method, the temperature of the convex portion of the rib is kept low, and although the heat is hardly transmitted to the hand holding the container, the rib functions as a cooling fin. In order to fulfill, it was inferior in terms of heat retention. Further, there is a problem that the step formed between the rib and the cup main body is inferior in appearance and printability.

A method has been proposed in which a heat insulating air layer is provided between a cup body and an outer cylinder which is an exterior member provided outside the cup body. That is, Japanese Unexamined Utility Model Publication No. Hei 6-39717 proposes a heat-insulating paper cup in which a paper sheet having a point-like embossed pattern at the same depth is wound around the outer periphery of the paper cup. The emboss pattern of the point-like convex portion or concave portion having a height difference of 1 to 2 mm and a diameter of 2 to 5 mm is 3 to 10 / cm.
^Although the paper sheet applied at a density of ² is wound around the outer periphery of the side wall of the paper cup, there is a problem that appearance and printability are poor.

On the other hand, Japanese Patent Laid-Open Publication No. 6-65279 proposes a method in which a rib and an embossed paper are attached to the outer periphery of a cup, and furthermore, an outer paper is attached to the outermost periphery. The points will increase, and the objective of resource saving mentioned in the head cannot be achieved.

[0007] The method of providing ribs on the outer surface of the body of these containers, the method of winding embossed paper, and the method of attaching exterior paper to the outside of the embossed paper have poor cooling, poor appearance, and increased number of parts. As a means for improving the point, a paper container in which a step is provided on the peripheral wall of the body and an outer paper is wrapped around the cup body from the outside to form a void is conventionally proposed in Japanese Patent Application Laid-Open No. 4-201840. I have. Japanese Utility Model Laid-Open Publication No. 4-45212 proposes a method of providing an air heat insulating layer by covering an outer periphery of a cup body with a paper outer cylinder curled inward around the bottom periphery of the cup body.
Further, Japanese Patent Application Laid-Open No. 7-223683 proposes a method in which a band-like projection is provided on the circumference of the outer wall surface of the body of the cup body, and a heat insulating air layer is provided between the cup body and the outer wall surface.

However, in the above-described methods of providing the heat-insulating air layer, since the air-insulating air layer is provided by increasing the volume of the gap, these gaps are crushed when hot water is poured and the cup is lifted by hand. There is a problem that the heat insulation effect is impaired.

If the rigidity of the paper is increased in order to suppress the "crushing", the paper is less likely to bend. To increase the rigidity of the paper, there is a measure to increase the basis weight of the paper. However, this approach not only failed to achieve the purpose of saving resources, but also had the problem that when the paper sheet was wound around the inner paper cup, the paper was too thick and difficult to mold, and the paper was broken and the appearance was poor. .

As a means of exhibiting rigidity without increasing the weight of paper, it is conceivable to reduce the amount of used paper or to use a strong pulp such as UKP (unbleached kraft pulp) without mixing. However, when the paper strength is increased, when the sheet is wound around the inner paper cup, there is a problem that the paper is too hard to be formed, is hard to be formed, breaks the paper, and deteriorates the appearance.

When selecting an exterior paper having both ease of molding and rigidity that does not cause the heat insulating air layer to collapse, paper or paperboard having a rigidity within a certain range must be used.
There was a problem in using general paper and paperboard.

[0012]

SUMMARY OF THE INVENTION
There is a known heat-insulating container that is easy to mold using general paper and paperboard, increases the rigidity of the body of the interior paper cup, and has a shape in which the insulating air layer between the exterior paper and the cup is not easily crushed. And its development was desired.

[0013]

Means for Solving the Problems The present inventor has not only a heat insulating property and a heat insulating property, but also the above-mentioned heat insulating air layer is hardly crushed, and is safe when eating food, and has good printability and appearance. As a result of intensive research on methods to provide paper cups that are manufactured without complicating the manufacturing process without compromising the product's A paper sack is wrapped around the outer surface of the body to make the cup body a double-layered structure. By giving the inner cup a special shape and structure, the insulating air layer can be formed without applying special processing or molding to the exterior paper. I found something that could be formed. Furthermore, it has been found that a heat insulating air layer can be effectively formed by giving a special shape structure to the exterior paper.

That is, in a paper cup in which a paper sack is wound around the outer surface of the body of the paper cup to form a double body, the paper sack made of paper or paperboard punched out in a substantially fan shape is used as the body of the paper cup. When wrapped around the outer surface, place the paper cup between the upper and lower edges of the fan-shaped paper or paperboard,
After forming a cup having a large number of polygonal or lens-shaped unit surfaces separated by straight lines or arc-shaped ruled lines and then forming a cup, the outer paper is wound around the outer surface of the body of the cup, An insulation space consisting of a substantially triangular truss structure or arch structure can be formed between the unit surface of the cup or the ruled line section dividing the unit surface and the inner surface of the exterior paper body to which the sack is attached. It has been found that it is possible to maintain a heat insulating air layer without using a special paper base material having a large basis weight or performing special processing, and to provide good heat retention and heat insulating properties.

Further, when a paper sack made of substantially fan-shaped punched paper or paperboard is wrapped around the outer surface of the body of a paper cup, the upper and lower edges of the paper sack outer paper made of the fan-shaped paper or paperboard are formed. Between the outer surface of the cup and the outer surface of the cup, after forming a ruled line so that a number of polygonal or lens-shaped unit surfaces separated by a line that forms a straight line or an arc are connected in a row, Almost 3 between the inner surface of the paper cylinder
It has been found that it is possible to form a rigid heat-insulating space composed of a square truss structure or an arch structure, and to maintain a heat-insulating air layer and to provide good heat retention and heat insulation as described above. Moreover, when such a structure is provided to each of the cup and the outer paper, the strength is structurally provided, so that a low-strength range paper or a light paper which could not be used conventionally can be used. I found that

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In order to maintain a heat insulating air layer structure that is hard to collapse, rigid paper and paperboard are usually required.
In the case of simply rigid paper or paperboard, there is a problem that the winding formability is reduced. Therefore, paper and paperboard having both rigidity and wrap formability are required. However, even if general paper or paperboard is used, if a straight or curved ruled line is formed on the paper and a number of unit surfaces are continuously formed to form an inner cup, the unit surfaces make a substantially triangular shape. Many trusses or arches are formed. Therefore, if this triangular truss or arch creates an insulated air layer between the paper sack and the inner cup, it does not require any special processing on the exterior paper and does not use any specific paper or paperboard. It is possible to form a heat-insulating air layer that is hard to be crushed.

As is apparent from the above description, an object of the present invention is to provide a heat-insulating container having a space for providing an insulating air layer between a paper cup and an exterior sack.
Enables easy selection of sack paper base material to maintain container strength and suppress reduction in heat retention and heat insulation without applying special processing to exterior paper, and eats food At times, to provide paper cups that are safe, manufactured without going through complicated manufacturing processes without impairing product properties such as printability and appearance, and that are easy to dispose of when discarded and have a low environmental impact. is there.

In order to achieve the above object, the heat insulating and heat insulating container of the present invention employs the following constitution. That is, in a paper cup in which the paper body sack is wound around the outer surface of the body part of the paper cup to make the body part of the cup into a double structure, the body member of the paper cup made of paper or paperboard is laminated.
At the same time when the sheet is punched almost fan-shaped from the back side, the ruled line processing is performed, and then the trunk is glued with a winding machine,
When the bottom is finished to form a cup, and then the top of the cup is curled and the upper end is finally rounded and shaped, the irregularities are automatically formed at the ruled lines, i.e., straight or circular Are formed in such a manner that a number of polygonal or lens-shaped unit surfaces separated by a ruled line are formed in series.

The outer packaging sack which is subsequently wrapped around the outer surface of the body of the paper cup is likewise made of paper or paperboard.
After printing in advance, the sheet is punched into a substantially fan-shaped sheet, and at the same time, ruled line processing is performed as needed. When the outer paper is rolled up by a wrapping machine and wound on the outer surface of the body of a paper cup that becomes inside, if a sheet with a ruled line is used on the outside, an uneven shape is automatically formed at the ruled line part like a cup, A plurality of polygonal or lens-shaped unit surfaces separated by straight or arc-shaped ruled lines are formed so as to be continuously provided. For this reason, it is characterized in that a heat insulating space having a substantially triangular truss structure or arch structure is formed between the inner cup and the exterior paper body.

In other words, according to the present invention, a paper cup of a specific shape is fitted inside an outer paper sack, and the sack is cup-shaped so as to form a heat insulating air layer between the inner surface of the sack and the outer surface of the cup body. A heat insulating and heat-insulating container fixed so as not to be displaced by sticking or sticking to the upper and lower ends of the outer periphery or the vicinity thereof, wherein the paper cup is made of paper or paperboard cut into a substantially fan shape, and the fan-shaped paper or After forming a multiplicity of polygonal or lens-shaped unit surfaces separated by straight lines or arc-shaped ruled lines between the upper and lower edges of the paperboard, the cup is formed, and the cup is formed. A unit surface or a ruled line portion for dividing the unit surface is formed on the body side wall.

On the other hand, as in the case of the paper cup, the exterior paper also has a large number of polygonal or lens-shaped polygonal or lens-shaped sections that are separated by straight or arc-shaped rules between the upper and lower edges of the fan-shaped paper or paperboard. After the unit surface is formed so as to be connected continuously, the entire surface is sack pasted after the unit surface or the ruled line section dividing the unit surface is formed, and between the outer surface of the cup body of the inner cup,
It is preferable to form the space by combining a heat insulating air layer having a substantially triangular truss structure or arch structure so as not to overlap.

The "sack" here is equivalent to the "exterior member" provided on the outside of the cup in the prior art, and the "suck". This means that both ends of a paper sheet punched in a fan shape are stuck together to form a vertically open state.

There is no special condition for the rigidity of the paper cup base material used in the present invention, and general paper and paperboard can be used as the base material of the paper cup. As a particularly preferable case, when the grammage is in the range of 120 to 300 g / m ² and the density is 0.60 to
1.3 g / cm ³ , Young's modulus is 2.0 to 9.0 Gpa
(However, the geometric mean of the Young's modulus in the direction parallel to the papermaking direction and the direction perpendicular to the papermaking direction), and what kind of paper, if the base material is paper or board made of one or more layers of combined papermaking,
Can also be used on paperboard. The surface may be water- or alcohol-resistant with a polyethylene film or various surface treatment agents, or may not be.

There is no special requirement for the rigidity of the paper sack substrate used in the present invention, and general paper and paperboard can be used as the substrate of the paper sack. As a particularly preferable case, the basis weight is 120 to 400 g / m ² , and the Young's modulus is 0.7 to 3.5 Gp in a geometric mean value in a direction perpendicular to a direction parallel to the papermaking direction.
a and the density is 0.45 to 1.0 g / cm
Any paper or paperboard in the range of ³ can be used. As in the case of the paper cup base material, the use of a base material having adjusted physical property values in the respective preferred ranges further improves the cup formability, print processability, and handleability of the obtained paper cup.

In order to produce each base paper within these numerical ranges, it is not particularly necessary to use rigid pulp, for example, KP (kraft pulp), and pulp can be freely selected. . Even commercially available paper and paperboard can be adopted without particular limitation as long as they satisfy the above characteristics, and coated paper, cast-coated paper,
You can also select from high quality paper.

[0026]

In the present invention, when forming and manufacturing an exterior paper to be stuck on a paper cup, fan-shaped paper or paperboard is used, and a straight or arc-shaped ruled line is formed between the upper and lower edges thereof. After forming a large number of polygonal or lens-shaped unit surfaces connected in a row, forming the cup and forming the outer paper, and then wrapping the outer paper around the outer surface of the body of the cup, A heat insulating air layer can be formed by the structure to be formed. That is, since the curvature of the upper opening and the lower opening of the side wall body of the cup are different, different winding stresses are generated in the area of each unit surrounded by the ruled line when winding, and as a result, For each unit surface surrounded by the ruled line of the body blank, the body is glued with a wrapping machine, the bottom is finished to form a cup, the upper part of the cup is curled, and the upper end part is finally rounded and finally shaped At the time of trimming, a convex curved surface or a concave curved surface is automatically exhibited at the ruled line portion as shown in FIGS. Similarly, when the exterior paper to be stuck is also provided with a ruled line as necessary, each unit surface surrounded by the ruled line of the side wall body blank is bonded to the body with a winding machine and stuck. At this time, the ruled line portion shown in FIGS. 5 to 7 automatically assumes a convex curved surface or a concave curved surface. When these are bonded together so as not to overlap, a heat insulating air layer is formed by the structures formed by each.

In the present invention, the reason why the heat insulating air layer structure which is hard to be crushed between the paper sack and the inner cup can be maintained and the cup forming performance can be obtained can be considered as follows. Needless to say, the paper itself needs rigidity to maintain the adiabatic air layer structure, but the deformation of the paper is generally proportional to the thickness, Young's modulus and density of the paper.
This is also evident from the structural dynamics equation. Usually, the amount of deflection when the cup is held by hand can be obtained from the equation of the amount of deflection of a simple flash as follows. For simplicity, the basis weight of the base paper is fixed, the thickness of the paper is h, the density is ρ, the Young's modulus is E, the distance between the fulcrums is 2a, the distance between the fulcrums where the load P is applied is a, and the width is b. Then, the amount of deflection when the load P is applied is 2P · a ³ / E ·
b · h ³ . On the other hand, when a simple beam supported between two points has a truss structure and a load P is applied from above, and the angle between the truss member and the direction connecting the fulcrum is θ, the amount of deflection at that time is E · h · sin ² θ / a + 12E ·
h ³ · cos ⁵ θ / a ^3, and the amount of deflection can be reduced by using a truss structure. In addition, if the above-mentioned simple beam becomes an arch, and the same arch continues in the lateral direction and is joined and integrated, it becomes a shell structure. Also in these cases, the amount of deflection can be reduced as in the case of the truss structure.

In the present invention, the Young's modulus is a numerical value indicating the paper tensile resistance, also called the elastic modulus or the elastic modulus.
This numerical value not only affects the rigidity but also closely relates to the formability of the paper, such as the suitability for drawing, folding, and curling of the paper. What has a high correlation with the physical properties of the molded cup is the geometric mean value of the Young's modulus of the paper in the vertical direction (papermaking direction) and the horizontal direction (width direction). The measurement method is calculated from the initial linear gradient of the load-deformation curve obtained from the constant-speed elongation type tensile test and the cross-sectional area of the paper. In addition, the resonance frequency during vibration can be obtained using a high-sensitivity condenser microphone and an FFT analyzer, and the resonance frequency can be derived from the numerical value of bending stiffness. Furthermore, the elastic modulus can be derived from the amount of bending displacement and the load using the three-point bending method.

There is no particular limitation on the method of making the paper base material, but the paper base material may be formed by laminating a single layer or a plurality of layers using a long net or round net paper machine, or by mixing a plurality of pulp. At the time of papermaking, there is a method of finishing to a desired density using a calender. In these methods, if the paper cup base material preferably has a basis weight in the range of 120 to 300 g / m ² , the papermaking conditions and the pulp to be used are not particularly limited as long as it can be manufactured, and mechanical pulp such as GP, RGP, and TMP is used. And semi-chemical pulp such as CGP and SCP
Chemical pulp such as P and KP, and pulp using non-wood can be used.

The basis weight of the paper sack of the exterior paper is preferably in the range of 120 to 400 g / m ² , and the geometric mean Young's modulus in the vertical and horizontal directions of the paper is 0.7 to 5.5 G as described above.
paper, if the density is in the range of 0.45 to 1.0 g / cm ³ , the papermaking conditions and the pulp to be used are not particularly limited as long as it can be manufactured. Mechanical pulp such as GP, RGP, TMP, CGP, Semi-chemical pulp such as SCP or S
Chemical pulp such as P and KP, as well as pulp using waste paper or non-wood can be used.

There is no particular limitation on the setting of pulp freeness for the paper cup and the paper sack, especially for individual papermaking. Individual pulp freeness adjustments include various types of conical, drum, and disc refiners,
Jordan can be used. Further, for these controls, various process measurement control devices can be used.
For adjusting the freeness, a low-molecular polymer of an electrostatic bonding type or a cross-linked polymer having a relatively high molecular weight, for example, polyethyleneimine or polyacrylamide can also be used.
In addition, various anionic, nonionic, cationic or amphoteric retention improvers, paper strength enhancers, sizing agents, and the like can be appropriately selected and used as described above.

In order to form the paper cup and the sack paper base material of the present invention, pulp or pulp mixed with a paper strength enhancer is flowed through a wire net, paper-formed, dewatered and dried. Examples of the paper-strength enhancer used therein include urea formaldehyde resin, melamine formaldehyde resin, polyamide urea formaldehyde resin, ketone resin, polyamide epichlorohydrin resin, polyamide polyamine epichlorohydrin resin, glycerol polyglycidyl ether resin, and polyethylene imine resin. be able to. Two or more of these paper strength enhancers may be used in combination. In addition, a dry strength agent, a wet strength agent, a water resistance agent, a sizing agent, a slime control agent, an internal filler, a dye, a defoaming agent, and the like may be used as necessary. The sack paper substrate may or may not be coated with a pigment-containing paint for improving printability. There is no particular limitation on the pigment coating composition to be a paint. There are no particular restrictions on the coating method for the equipment,
Various coaters such as a blade coater and a rod coater can be used.

The surface of the paper substrate for the sack can be used by printing as it is, but the thermoplastic synthetic resin film is fused on the printing surface or printed on the back surface of the thermoplastic synthetic resin film. Later, it can be fused. Further, the base material and the general printing paper after printing, or the printing paper before printing can be formed by using a thermoplastic synthetic resin film, a rubber-based, an acrylic-based, a silicone-based adhesive, a hot-melt adhesive, a starch-based adhesive, or a plant-based gum. It can also be used by bonding with an adhesive such as an adhesive. When printing paper before printing and the above-mentioned paper base material are bonded, there is no problem in use even if printing is performed after bonding.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, in which the sack has ruled lines for convenience. FIG. 1 is a perspective view showing an example of the appearance of a heat-insulating container according to the present invention, in which a paper sack 1 is wrapped around the outer surface of a trunk of a frustro-conical paper cup 2 provided with ruled lines. The sack is fixed to the upper end and the lower end of the outer periphery of the cup or in the vicinity thereof so as not to be displaced by adhering or sticking to form an insulating air layer between the inner surface of the cup 1 and the outer surface of the cup 2. It consists of.

As shown in FIGS. 2 to 4, the paper cup 2 is made of paper or paperboard 6 cut into a substantially sector shape, and a straight line or a straight line is formed between the upper edge and the lower edge of the sector shape paper or paper board. A multiplicity of polygonal or lens-shaped unit surfaces 8 to 10 separated by arc-shaped ruled lines 7 are formed so as to be continuously provided, and both ends are laminated and cup-molded to cut the whole. Adhered with a torso wrapping machine so as to form a cone,
After the bottom finishing and the curling treatment, the cup is in the state shown in FIGS. 8 to 10, and a substantially triangular truss structure or arch structure is formed on the outer peripheral surface of the side wall of the cup by the unit surface. These paper cups are formed by winding a blank made of processed paper coated with polyethylene or the like on the inner surface or the inner and outer surfaces, and bonding both ends thereof to form a body, and a bottom plate made of the same paper below the body. 3 and an outward curl portion 4 is formed at the upper opening edge. A polygonal or lens shape divided by a ruled line 7 that forms a straight line or an arc between the upper edge and the lower edge. It is the same as a conventional paper cup except that a number of unit surfaces 8 to 10 are formed so as to be continuously provided.

The height of the paper sack 1 is substantially the same as the height of the paper cup 2. The upper opening of the paper sack 1 is formed to be slightly smaller than the outer diameter of the curled portion 4 at the upper edge of the paper cup, and the lower opening of the sac is slightly larger than the outer diameter of the bottom of the paper cup. As shown in FIGS. 5 to 7, the sack is formed on the upper and lower ends of the outer periphery of the cup or the outer surface of the cup so as to form a heat insulating air layer 5 between the inner surface of the sack and the outer surface of the cup. A vinyl acetate-based adhesive or the like is adhered to the tops of the projections formed by the ruled lines and the vicinity thereof, or they are fixed to the upper and lower portions of the outer periphery of the cup so as not to be displaced.

The height of the paper sack 1 does not always need to be substantially the same as the height of the paper cup 2, and if the sack is at least in the part held by hand, the same heat-insulating action as described above is achieved. The sack may be formed short so that the body of the cup is exposed on the upper side and / or the lower side of the sack.

The heat-insulating paper cup according to the present invention is obtained by printing exterior paper to be pasted on the cup in advance, punching it into a fan shape, and bonding both ends of the punched sheet so that the upper and lower sides are open. On the other hand, the outer surface of the body of the inner paper cup is punched out in a fan shape, a ruled line is formed, the cup is formed by a winding machine, the bottom is formed, and the opened upper flange portion is curled and formed. Is what you do. The heat-insulating paper cup according to the present invention is characterized in that irregularities are formed without applying a large external force when bonding both ends of the punched and creased cup exterior paper, and the paper is formed using a special fitting machine or the like. There is no need to make the surface uneven. Therefore, the heat-insulating paper cup according to the present invention has a heat-insulating air layer in a simpler process than the conventional one.
Insulated paper cups can be manufactured.

[0039]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which, of course, are not intended to limit the present invention. The numerical values indicating the concentration, blending, application amount, etc. are numerical values based on the weight of the solid content or the weight of the active ingredient. First,
It will be described from the base material configuration of Sac.

Example 1 A single layer composed of NBKP / LBKP = 20/80 was prepared.
Using a cup base paper made of high-quality paper having a thickness of 200 g / m ² and a density of 0.90 g / cm ³ , polyethylene having a thickness of 40 μm was fusion-laminated on one side. A number of ruled lines 7 are formed so as to form a unitary surface 9 having a rough diamond shape, and punched in a fan shape by a die cutter. Both ends of the punched sheet are stuck together by a cup forming machine. Molded so as to be in a state, separately fused and laminated a 40 μm-thick polyethylene on one side using the same cup base paper, pasted a bottom plate punched in a circular shape and finished the bottom, forming a cup, The upper portion of the cup is curled, and the upper end portion is finally rounded and formed into a flange to form the cup 2. Thereafter, the outer cup to be wound around the outer surface of the body of the paper cup has a size of 350 g / m ² and a density of 0.80 g / cm ^3.
The special surface paper is used to perform offset printing on the surface in advance, and then several ruled lines 7 are formed from the front surface of this sheet so as to form a substantially rhombic unit surface 9 as shown in FIG. And punch it into a fan shape using a die cutter. The both ends of the punched sheet are attached to each other and molded so that the upper and lower sides are open to form a sack 1. The upper end of the sack is placed on the lower side of the outer periphery of the curl portion 4 of the cup so that the sack 1 is fitted to the outer surface of the body of the cup body 2 and an insulating air layer 5 is formed between the inner surface of the sack and the outer surface of the cup body. In addition, the lower end of the sack is brought into close contact with the outer periphery of the lower part of the cup, and is adhered with vinyl acetate glue so as not to be displaced, thereby obtaining a double cup as shown in FIG.

Example 2 A single layer composed of NBKP / LBKP = 20/80 was prepared.
Using a base paper for a cup made of high-quality paper having a thickness of 180 g / m ² and a density of 0.90 g / cm ³ , polyethylene having a thickness of 40 μm was fusion-laminated on one side. In this way, several ruled lines 7 are formed so as to form a substantially lens-shaped unit surface 9 and punched out in a fan shape by a die cutter. The both ends of the punched sheet are stuck together with a cup forming machine, formed so as to be open at the top and bottom, and separately using a similar cup base paper to a thickness of 4 on one side.
0μm polyethylene is fused and laminated, a circular punched bottom plate is attached and the bottom is finished to form a cup,
Further, the upper portion of the cup is curled, and the upper end portion is finally rounded and formed into a flange to form the cup 2.
Thereafter, the outer cup to be wound around the outer surface of the body of the paper cup is made of white paperboard having a surface area of 350 g / m ² and a density of 0.80 g / cm ³ , and is subjected to offset printing in advance on the surface thereof. From the surface, several ruled lines 7 are formed so as to form a substantially lens-shaped unit surface 9 as shown in FIG. 6 and punched out in a fan shape by a die cutter. The both ends of the punched sheet are attached to each other and molded so that the upper and lower sides are open to form a sack 1. other than that,
The same operation as in Example 1 is performed to obtain a double cup as shown in FIG.

Example 3 A single layer composed of NBKP / LBKP = 20/80 was prepared.
Using a base paper for cup made of high quality paper having a thickness of 180 g / m ² and a density of 0.90 g / cm ³ , polyethylene having a thickness of 40 μm was fusion-laminated on one side, and then the back of the sheet was used as shown in FIG. In this way, several ruled lines 7 are formed so as to form a substantially arrowhead-shaped unit surface 9 and punched out in a fan shape by a die cutter. The both end portions of the punched sheet are stuck together by a cup forming machine, formed so as to be open at the top and bottom, and separately using the same cup base paper and having a thickness of 40 on one side.
μm polyethylene is fusion-laminated, a circularly punched bottom plate is attached and the bottom is finished to form a cup, the upper part of the cup is curled, and the upper end part is finally rounded to form a flange. Create Thereafter, the outer cup to be wound around the outer surface of the body of the paper cup is made of white paperboard having a size of 200 g / m ² and a density of 0.80 g / cm ³ , and is subjected to offset printing in advance on the surface thereof. From the surface, several ruled lines 7 are formed so as to form a substantially lens-shaped unit surface 9 as shown in FIG. 6 and punched out in a fan shape by a die cutter. Thereafter, the sheet is punched into a fan shape by a die cutter, and both ends of the punched sheet are bonded together and formed so as to be open at the top and bottom to form the sack 1. other than that,
The same operation as in Example 1 is performed to obtain a double cup as shown in FIG.

COMPARATIVE EXAMPLE 1 White paperboard having a surface area of 450 g / m ² and a density of 0.80 g / cm ³ was prepared. Separately, polyethylene having a thickness of 40 μm was fusion-laminated to the inner wall portion at 210 g / m ² and the density was 0.80.
A cup body made of high-quality paper of g / cm ³ is formed, and a protrusion by a Peter line is provided on the outer periphery of the body wall of the cup body at a position of 1.0 mm in width and 20 mm from the upper edge of the cup. The outer paper is wound around the outer periphery of the body of the cup with the Peter wire so as to form a heat insulating air layer, and the outer paper and the cup are fixed with vinyl acetate glue as in the first embodiment. Was adhered to exterior paper with vinyl acetate glue to obtain a cylindrical double container.

[0044] Comparative Example 2 basis weight 350 g / m ^2, using a white paperboard density 0.80 g / cm ^3, to prepare an exterior paper advance offset printing on the surface thereof, the sacks which were inwardly curled bottom periphery Mold. Separately, polyethylene having a thickness of 40 μm was fusion-laminated to the inner wall portion at 210 g / m ² , and the density was 0.80 g /
Form a cup body of cm ³ fine paper. The sack was fitted around the outer periphery of the body of the cup so as to form a heat-insulating air layer, and the sack and the cup were fixed with vinyl acetate glue in the same manner as in Example 1 to obtain a cylindrical double container.

Example 4 A single layer composed of NBKP / LBKP = 20/80 was prepared.
Using a base paper for cup made of high-quality paper having a thickness of 110 g / m ² and a density of 0.90 g / cm ³ , polyethylene having a thickness of 40 μm is fusion-laminated on one side, and then, from the back of this sheet, as shown in FIG. In this way, several ruled lines 7 are formed so as to form a substantially lens-shaped unit surface 9 and punched out in a fan shape by a die cutter. The both ends of the punched sheet are stuck together with a cup forming machine, formed so as to be open at the top and bottom, and separately using a similar cup base paper to a thickness of 4 on one side.
0μm polyethylene is fused and laminated, a circular punched bottom plate is attached and the bottom is finished to form a cup,
Further, the upper portion of the cup is curled, and the upper end portion is finally rounded and formed into a flange to form the cup 2.
Thereafter, the outer cup to be wound around the outer surface of the body of the paper cup is made of white paperboard having a size of 110 g / m ² and a density of 0.80 g / cm ³ , and is subjected to offset printing in advance on the surface thereof. From the surface, punch it out in a fan shape with a die cutter. The both ends of the punched sheet are attached to each other and molded so that the upper and lower sides are open to form a sack 1. Otherwise, the same operation as in Example 1 is performed to obtain a double cup.

Evaluation Test Method In order to see the superiority between the product of the present invention having a truss structure and the product having no truss structure, judgment was made by the following adiabatic suitability test and cost comparison. 1. The geometric mean value of the Young's modulus in the longitudinal and transverse directions The Young's modulus is calculated by the tensile test method according to JIS-P-8113, the graph of the load and displacement in the vertical and horizontal directions of the paper, and the cross-sectional area obtained from the paper thickness and the width of the test piece. Gives E
(Young's modulus) = F (tensile strength) / ε (strain amount) × A
(Cross-sectional area) and the geometric mean. 2. Deflection Fix the cup body to the base, 50mm from the top of the outer paper
KES-F which is an automatic displacement and heat flow detection measuring device at the position
Using an artificial finger (contact area 2.0 / cm ² ) of 7 Thermolab (manufactured by Kato Tech Co., Ltd.), a load of 125 gf / c
The amount of displacement of the exterior paper when the exterior part of the cup was pressed under the conditions of m ² and a pressing speed of 0.2 mm / sec was calculated as the amount of deflection. 3. Surface temperature The surface temperature of the cup exterior was measured using a contact thermometer. 4. Insulation holding time After leaving the cup in an environment of 20 ° C and 65% RH for 24 hours, put warm water of 95 ° C into the cup, and after 3 minutes hold the cup by hand, feel hot, and change the position of the finger from the container. The time to reach was measured as the adiabatic time. 5. Insulated touch 3 minutes after pouring hot water, the time to hold the cup by hand was evaluated.
In these time ranges, a five-point evaluation of △ to △ to × was made. In order to reduce the measurement error by the tester, measurement was performed by three or more persons and average data was adopted. ○: 60sec or more, ○ 〜 △: 45-60sec, △: 30〜
5. 45sec, △ -x: 15-30sec, ×: 15sec or less Outer paper cost Paper paper technology cooperative paper volume 52 No. 7, July 1998 issue, calculated the price from Tokyo paper and paperboard wholesale market price list. A slightly higher one was marked as △, and a clearly higher one was marked as ×. 7. Comprehensive Judgment According to the above evaluation items 4 to 6, those having at least one x were judged as x, and those evaluated as o and と し た were evaluated as o.
Table 1 shows the results.

[0047]

[Table 1]

From the results shown in Table 1, when the cup having the triangular truss structure prepared in Examples 1 to 4 is used, the space formed by the cup body surface and the sack is used.
A substantially triangular trussed or arched insulating air layer is created, which maintains the insulating air layer without using a special paper base material with a large paper basis weight, and provides good heat retention and heat insulation. I knew I could do it.

[0049]

As described above, according to the present invention, a special paper base material having a large paper basis weight is used in a heat-insulating container having a gap for providing a heat-insulating air layer between the inner surface of the sack and the outer surface of the cup. Even without using low-grade paper or paperboard, the strength of the container can be maintained without using a conventional paper container. To make it easy to select and create a sack paper substrate to suppress the reduction in heat retention and heat insulation, and when eating food, it is safe, printable, The present invention is useful in that a paper cup that is manufactured without a complicated manufacturing process without impairing the merchantability such as appearance and the like, and that can easily be disposed at the time of disposal and has a low environmental load can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the appearance of a heat insulating and insulating container of the present invention.

FIG. 2 is a plan view showing fan-shaped paper and paperboard constituting a cup.

FIG. 3 is a plan view showing another example of fan-shaped paper and paperboard constituting a cup.

FIG. 4 is a plan view showing another example of the fan-shaped paper / paperboard constituting the cup.

FIG. 5 is a plan view showing fan-shaped paper and paperboard constituting the exterior paper.

FIG. 6 is a plan view showing another example of fan-shaped paper and paperboard constituting the exterior paper.

FIG. 7 is a plan view showing another example of fan-shaped paper and paperboard constituting the exterior paper.

FIG. 8 is a longitudinal sectional view showing a state in which the cup of FIG. 2 and the outer paper of FIG. 5 are stuck and wrapped around the outer surface of the body of the cup, and taken along line A and B in FIG. It shows the outline when the sack is cut.

9 is a vertical cross-sectional view showing a state in which the cup of FIG. 3 and the outer paper of FIG. 6 are stuck and wrapped around the outer surface of the body of the cup, and taken along line A and line B in FIG. 3; It shows the outline when the sack is cut.

10 is a longitudinal sectional view showing a state in which the cup of FIG. 4 and the exterior paper of FIG. 7 are stuck and wrapped around the outer surface of the body of the cup, and taken along line A and line B in FIG. 4; It shows the outline when the sack is cut.

FIG. 11 is a plan view showing still another example of the fan-shaped paperboard constituting the cup.

FIG. 12 is a plan view showing a state in which the folded portion of the fan-shaped paperboard shown in FIG. 8 is bent and bonded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Paper sack 2 Paper cup 3 Bottom plate 4 Curl part 5 Insulated air layer 6 Paperboard 7 Ruled line 8-10 Unit surface

Claims (7)

[Claims] A paper cup in which a paper sack is wound around the outer surface of a body of a paper cup to form a double body of the cup body.
Between the upper and lower edges of a paper or paperboard paper cup blank, punched out in a substantially fan shape, a number of polygonal or lens-shaped unit surfaces separated by linear or arcuate ruled lines are connected. After the cup is formed and formed into a cup, the paper sack is wrapped around the outside of the body of the cup, and the gap between the unit surface of the cup or the ruled line dividing the unit surface and the inner surface of the exterior paper body to which the sack is attached. A heat insulating and insulated container characterized by forming an insulated space having a substantially triangular truss structure or arch structure. 2. A heat insulating space is formed by putting a ruled line in the same straight or arc shape as the paper cup or a different ruled line on a paper sack wound around the outer surface of the body of the paper cup, and combining them so that they do not overlap. The heat insulation and heat insulation container according to claim 1, wherein the heat insulation and heat insulation container is provided. 3. The sack is fixed to the upper end and the lower end of the outer periphery of the cup or at or near the upper end and the lower end thereof so as not to be displaced by adhering or sticking so as to form a heat insulating air layer between the inner surface of the sack and the outer surface of the cup body. Item 3. The heat insulation container according to item 1 or 2. 4. The paper base constituting the paper cup has a basis weight of 1
The heat insulation container according to claim 1, 2 or 3, which is paper or paperboard in a range of ^{20 to} 300 g / m2. 5. The paper base constituting the paper sack has a basis weight of 1
The heat insulation container according to claim 1, 2, 3, or 4, which is paper or paperboard in a range of ^{20 to} 400 g / m2. 6. The paper base constituting the paper cup has a density of
0.60 to 1.3 g / cm ^ThreeThe Young's modulus is 2.0-9.
0 Gpa (however, the paper perpendicular to the direction parallel to the papermaking direction
Average value of the coating rate), and the base material is one or two layers.
Specially, it is paper or paperboard made by combined papermaking.
The heat insulating and heat insulating container according to any one of claims 1 to 5, wherein
vessel. 7. The paper base constituting the paper sack has a density of
0.45 to 1.0 g / cm ^Three, The Young's modulus is 0.7-5.
5Gpa (however, the yarn perpendicular to the direction parallel to the papermaking direction
Geometric mean of the coating rate), and the base material is composed of one or more layers.
Characterized as paper or paperboard made from the above combined papermaking
The heat-insulating container according to any one of claims 1 to 6.
vessel.