JP6160145B2 - Insulating cup and method for producing sheet used therefor - Google Patents

Description

The present invention relates to a manufacturing method of the sheet for use therein and adiabatic cup.

  Corrugated cardboard is often used from the expectation of the buffer effect and the heat insulation effect. Common cardboard is made of a core material obtained by corrugating paper and a paper liner material bonded to the core material. Further, moisture-proof corrugated cardboard has been used in order to prevent moisture absorption or to prevent transpiration of moisture.

  For example, a thermoplastic synthetic resin layer, a moisture-proof aluminum layer, a paper layer, a liner material comprising a thermoplastic synthetic resin layer on the surface of the paper layer, and a core material comprising a paper layer and thermoplastic synthetic resin layers on both outer surfaces thereof There is a method for manufacturing a moisture-proof corrugated cardboard in which a liner material and an intermediate core material are bonded and fixed only at the wavy top of the intermediate core material (Patent Document 1).

  However, in the case of this moisture-proof corrugated cardboard, since the paper layer is provided, there is moisture resistance on the surface, but since the paper layer is exposed at the end surface, if water adheres to the end surface, it peels off at the paper layer. There was a fear.

  Known documents are shown below.

JP-A-4-164634

The present invention has been made in view of the above circumstances, and is to provide a heat-insulating cup using a sheet that is strong against water and has heat insulating properties and heat retaining properties, or has a buffering effect, and a method for manufacturing the sheet. It is an issue.

  Delete.

  Delete.

  Delete.

The invention according to claim 1 of the present invention is a sheet obtained by bonding the liner material on one or both sides of the core material in which is corrugated, the in the core material, and the liner material is made of plastic,
A sheet provided with a tightly closed portion by crushing the corrugated shape of the core material at two or more locations so as to be in close contact with the liner material, and providing a sealed space between the two tightly attached portions is the outer surface of the cup body. It is the heat insulation cup characterized by being attached to.

The invention according to claim 2 of the present invention is a method for producing a sheet used in the heat insulation cup according to claim 1 ,
A core roll made of plastic is passed between two molding rolls of a cross-sectional gear type, the core core is molded into a corrugated shape, and the core roll is held in one of the molding rolls. The liner material made of plastic provided with an adhesive layer is pressure-bonded ,
The adhesive layer is either provided by coating and drying the adhesive by gravure coating apparatus, or a method of manufacturing a sheet according to claim Rukoto such from the molten resin extruded from a T-die.

  Delete.

  Delete.

Adiabatic cup of the present invention is resistant to water, has a heat insulation and warmth, or have a buffering effect. And the sheet | seat used for this heat insulation cup can be continuously manufactured with the manufacturing method of the sheet | seat of this invention.

It is explanatory drawing which showed typically the reference example of the sheet | seat used for the heat insulation cup of this invention in the cross section. (A) A sheet in which a liner material is bonded to one side of the core material, and (B) a sheet in which a liner material is bonded to both surfaces of the core material. It is explanatory drawing which showed typically an example of the sheet | seat used for the heat insulation cup of this invention by the perspective view. It is explanatory drawing of the bag using one reference example of the sheet | seat used for the heat insulation cup of this invention. (A) Front view, (B) Plan view. It is explanatory drawing of the heat insulation cup using the reference example of the sheet | seat used for the heat insulation cup of this invention. It is the schematic explaining an example of the manufacturing method of the sheet | seat of this invention.

Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is an explanatory view schematically showing a cross-sectional view of a reference example of a sheet used in the heat insulation cup of the present invention, in which (A) is a sheet obtained by bonding a liner material to one side of a core material, and (B) is A sheet in which a liner material is bonded to both surfaces of a core material. Figure 2 is an explanatory diagram showing an example of the sheet used for heat insulating cup of the present invention in schematically perspective.

As shown in the sectional view of FIG. 1A, one reference example of the sheet used for the heat insulating cup of the present invention is provided with an adhesive layer 3 on a liner material 2 on one side of a corrugated core material 1. The sheet 100 is adhered. Alternatively, as shown in the cross-sectional view of FIG. 1B, the sheet 200 is formed by providing adhesive layers 3 and 3 on liner materials 2 and 4 on both surfaces of a corrugated core material 1 and bonding them.

  Further, as shown in FIG. 2, the corrugation of the core material 1 of the sheet 200 is crushed in two or more places so as to be in close contact with the liner materials 2, 4 to provide the close contact portion 5, and sealed between the two close contact portions 5. It can be set as the sheet | seat 300 which provided the sealed space 6. FIG. If it does in this way, since gas, such as air in sealed space 6, does not escape, the effect of heat insulation and heat retention improves. In addition, the buffering effect is improved and the stored contents can be protected from impact.

  Although not shown, in the sheet 100 as well, two or more corrugations of the core material 1 are crushed and brought into close contact with the liner material 2 to provide a close contact portion 5, which is sealed between the two close contact portions 5. A sealed space 6 can be provided.

  The core material 1 and the liner materials 2 and 4 are made of plastic. As the plastic, polypropylene, polyethylene, polyethylene terephthalate, nylon or the like is used. These may be used as a single layer or may be a multi-layer combining them. These may be stretched films, unstretched films, or extruded resin layers.

  Further, the core material 1 or the liner materials 2 and 4 may have a multilayer structure, and a metal foil such as an aluminum foil may be provided in the intermediate layer. Furthermore, a vapor deposition layer may be provided on the film. The vapor deposition layer may be a metal vapor deposition layer such as aluminum or an inorganic compound vapor deposition layer such as aluminum oxide or silicon oxide.

  The adhesive layer 3 is a layer for adhering the core material 1 and the liner materials 2 and 4, and may be an adhesive layer or a resin layer provided by a molten resin extruded by a T-type die or the like. May be. The adhesive used for the adhesive layer may be a urethane-based adhesive used in dry lamination, a water-based adhesive, or a hot-melt adhesive, but a urethane-based adhesive can be particularly preferably used.

  Because it is made of such a material, unlike the corrugated cardboard using paper conventionally used, the sheets 100, 200, and 300 of this example are not laminated with paper, so that the layer is peeled off even when wet with water. Resistant to water. And it has heat insulation, heat retention, or a buffering effect.

Hereinafter, the bag will be described.
FIG. 3 is explanatory drawing of the bag using one reference example of the sheet | seat used for the heat insulation cup of this invention, (A) Front view, (B) Plan view.

  The bag 400 can be made using the sheets 100, 200, and 300 of this example. For example, as shown in FIG. 3, the sheet 200 of this example can be used as a front film and a back film of a bag, and the peripheral edge can be sealed to form a bag. In the figure, the side portion and the bottom portion of the bag are sealed, and the bottom portion is sealed, so that the corrugation of the core material 1 is crushed and brought into close contact with the liner materials 2 and 4, thereby providing the contact portion 5. Then, by sealing the top portion after filling, the contact portion 5 is provided, and the sealed space 6 can be provided between the top portion and the bottom contact portion 5.

  In this case, the contents-side surface of the liner that is the inside of the bag is preferably an unstretched film of a heat-sealable thermoplastic resin or a resin by extrusion lamination. In particular, it is desirable to use a low-density polyethylene, a linear low-density polyethylene, a polypropylene unstretched film, or a resin layer by extrusion lamination.

  Further, it is desirable that the surface of the core material 1 and the inner surface layer of the adhesive layer 3 or the liner materials 2 and 4 are also thermoplastic resins that can be heat sealed to each other. By doing so, when the bag 400 is heat-sealed, the corrugated shape of the core material 1 can be crushed and the liner material 2 and 4 can be sealed and adhered to provide the contact portion 5.

  In the bag of FIG. 3, the sheet 200 is used for the front film and the back film, but only one film may be the sheet 200. Similarly, a bag can be made using the sheet 100 in which the liner material 2 is bonded to one side of the core material 1. In this case, the liner material 2 of the sheet 100 can be placed inside the bag, and the peripheral edge can be sealed to form a bag. Furthermore, a bag can be made in the same manner using the sheet 300 in which the close contact portion 5 is provided in advance and the sealed space 6 is provided.

Hereinafter, the heat insulating cup will be described.
FIG. 4 is an explanatory view of a heat insulating cup using one reference example of a sheet used for the heat insulating cup of the present invention.

  In the heat insulating cup 500 of this example, the sheet 200 is mounted on the outer surface of the body portion of the paper cup 10. The paper cup 10 used for the heat insulating cup 500 includes a body member and a bottom member. A bottom member having a peripheral edge bent portion is inserted into the bottom end of the cylindrical body member, and a bottom member provided with a peripheral bent portion is inserted. This is a paper cup 10 in which a lower end portion is folded inward, overlapped with a peripheral bent portion, and the whole is fused to form a leg portion 11 and a top curl portion 12 is provided at an upper end portion of a body member.

  The sheet 200 is mounted in a cylindrical shape on the body part formed by the body member of the paper cup 10. The sheet 200 may be attached by stacking and sealing both end portions of the sheet 200 into a cylindrical shape, and covering the lower end of the paper cup 10 or by winding a flat sheet 200 around the body of the paper cup 10 and sealing it. You may make it cylindrical.

  In the heat insulating cup 500, the sheet 200 in which the liner materials 2 and 4 are bonded to both surfaces of the core material 1 is used, but a heat insulating cup using the sheet 100 or the sheet 300 may be used. Further, although the paper cup 10 is used, a cup made of plastic such as polystyrene, polypropylene, or polyester formed by injection molding may be used.

  In this way, by attaching the sheets 100, 200, and 300 to the body portion of the cup, even if a hot thing is contained in the cup, it has heat insulation properties, so it does not feel hot even if it is held by hand. Such an insulating cup can be preferably used as a hot beverage such as coffee, ramen, and udon.

Hereinafter, the manufacturing method of the sheet | seat of this invention is demonstrated.
FIG. 5 is a schematic view for explaining an example of the sheet manufacturing method of the present invention.

  The core material 1 is unwound from the paper feed unit, and is formed into a corrugated shape by two forming rolls 21 and 22 having a cross-sectional gear shape, through a guide roll, as shown in FIG. The molding rolls 21 and 22 are heated and temperature-controlled. It is desirable that the molding roll 21 that first contacts the core material 1 is temperature-adjusted so as to soften at least one layer of the plastic of the core material 1.

  The core material 1 formed into a corrugated shape by the forming rolls 21 and 22 is a liner in which the adhesive layer 3 (not shown in FIG. 5) is provided by the pressure-bonding roll 23 while being held by the forming roll 22 2, the core material 1 and the liner 2 are bonded via the adhesive layer 3. Through the steps so far, the sheet 100 in which the liner material 2 is bonded to one surface of the core material 1 is manufactured.

  When manufacturing the sheet 200 in which the liner materials 2 and 4 are bonded to both surfaces of the core material 1, an adhesive layer 3 (not shown in FIG. 5) is further provided between the two crimping rolls 24 and 25. What is necessary is just to adhere | attach the obtained liner 4 on the opposite side of the liner material 2 of the core material 1.

  Further, in order to manufacture the sheet 300 by crushing the corrugation of the core material 1 and bringing it into close contact with the liner materials 2 and 4 to provide the contact portion 5 and the sealed space 6, the traveling sheet 100 and the sheet 200 are intermittently disposed. What is necessary is just to carry out crimping | pinching from upper and lower sides. Also at this time, it is preferable to carry out heating.

  The adhesive layer 3 may be an adhesive layer or a resin layer provided by a molten resin extruded with a T-type die or the like. When the adhesive layer is used, a two-component curable urethane-based adhesive used in dry lamination, a water-based adhesive, a hot-melt adhesive, or the like can be used.

  In particular, an adhesive used in dry lamination is applied to the liner material 2 or the liner material 4 with a gravure coater or a die coater and dried to provide an adhesive layer 3. It is preferable that the intermediate core material 1 is bonded by pressure.

  When the adhesive layer 3 is a resin layer, the thermoplastic resin is melted and extruded from a T-shaped die, and the adhesive layer 3 is provided on the liner material 2 or the liner material 4. 23 or the pressure-bonding rolls 24 and 25 may be bonded. The thermoplastic resin used at this time and the surface of the core material 1 are selected from resins that are melt-bonded to each other.

  The thermoplastic resin is melted and extruded from a T-shaped die, and after cooling, an adhesive is further applied and dried, and the adhesive layer 3 is provided on the liner material 2 and the liner material 4, and the crimping roll 23, the crimping roll 24, It can also be made to adhere by pressure bonding at 25.

  By the above method, the sheets 100, 200, and 300 can be manufactured continuously. Sheets 100, 200, and 300 manufactured in this manner are strong against water, have heat insulation and heat retention, or have a buffering effect. As a cushioning material used for packaging and the like, it can be used as a heat insulating material for a duct and a heat insulating material. It can also be used in packaging that requires heat insulation, heat retention or buffering effect.

Moreover, since the sheet | seat used for the heat insulation cup of this invention can give flexibility, it can process with the slitter used by the conventional film processing, and a bag making machine, and prepares an extra processing machine. There is no need. And since the liners 2 and 4 are plastic, cosmetics can be obtained by gravure printing.

  By providing the core material 1 and the liners 2 and 4 with a layer having a barrier property, the barrier property can be provided. Furthermore, it is possible to increase the number of core members to form a multi-stage sheet, and it is possible to improve the heat insulating property, the heat retaining property or the buffering effect.

100, 200, 300 ... sheet 400 ... bag 500 ... heat insulating cup 1 ... core material 2, 4 ... liner material 3 ... adhesive layer 5 ... adhesion part 6 ... Sealed space 10: paper cup 11 ... leg 12 ... top curl 21, 21 ... molding rolls 23, 24, 25 ... pressure roll

Claims (2)

A sheet in which a liner material is bonded to one or both sides of a corrugated core material, wherein the core material and the liner material are made of plastic, and the corrugation of the core material is at two or more locations A heat insulating material characterized in that a sheet provided with a close contact portion is provided by crushing and closely contacting the liner material, and a sealed space sealed between the two close contact portions is mounted on the outer surface of the cup body. cup. It is a manufacturing method of the sheet used for the heat insulation cup according to claim 1 ,
A core roll made of plastic is passed between two molding rolls of a cross-sectional gear type, the core core is molded into a corrugated shape, and the core roll is held in one of the molding rolls. The liner material made of plastic provided with an adhesive layer is pressure-bonded ,
The adhesive layer is either provided by coating and drying the adhesive by gravure coating apparatus, or method of manufacturing a sheet according to claim Rukoto such from the molten resin extruded from a T-die.

Images