JP2014169103A - Paper cup container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper cup container which has resistance even to getting-wet from outside such as use in the vicinity of water and also has resealability.SOLUTION: A paper cup container comprises: a cylindrical body member; a bottom member; and a top member having a resealable taking-out port. The body member has: a body member-bonded part in which both end edges of a blank for the body member are overlapped to seal; a lower folding part formed at the lower end of the body member by folding the blank for the body member inside; and an upper folding part formed by folding the end of the folded blank inside. The bottom member has a peripheral edge folding part folding down the peripheral edge of the blank for the bottom member. The peripheral edge folding part is inserted in between the lower end of the body member and the upper folding part to be sealed. The top member covers the end of the body member to be fused.

Description

  The present invention relates to a paper cup container.

  Conventionally, the peripheral edge of the bottom member is bent, an upright portion is provided, inserted into the lower end inside the cylindrical body member, the body member is bent and attached so as to overlap the upright portion of the bottom member, and the upper end of the body member is outside There is a paper cup with a top curl section, and this paper cup can be sold in stores or as a cup vendor for cold drinks such as juice and carbonated drinks and hot drinks such as coffee and cocoa. Widely used.

  Also, a paper cup container in which an opening of a paper cup is sealed with a lid or the like is often used as a sealed container. As such a paper cup container, there is a paper cup container in which a film-like lid material is sealed at the top curl part, and a paper cup container in which a resin ring is fused to the top curl part and the ring and the lid material are sealed.

  Alternatively, the top portion has the same shape as that of the bottom portion, that is, similarly to the bottom member, a lid member that is bent and raised is inserted into the inside of the cylindrical body member, and the body member is inserted into the standing portion of the lid member. There is a paper cup container that is bent and attached so as to overlap with the lid, and the opening of the drinking mouth provided in the horizontal portion of the lid member is sealed with a tab of the lid material (Patent Document 1).

  A retort paper cup has been proposed as a paper cup container having excellent water resistance and sealing properties. This paper cup container has a lower folded portion in which the body member is folded inward and an upper folded portion formed by further folding the folded body member inward, and an upright portion in which the peripheral portion of the bottom member is folded However, the lower end portion of the trunk member, the upper folded portion, and the standing portion of the bottom member are tightly sealed while being inserted into the lower folded portion of the trunk member.

  Furthermore, the edge extension part by which the thermoplastic resin layer was extended was provided in the both ends edge of the trunk | drum member, and the edge extension part located inside a trunk | drum member in a trunk | drum bonding part is a trunk | drum member. The edge extending portion which is folded back to the outside and located outside is folded back to the inside of the body member and located between the edges (Patent Document 2).

  Known documents are shown below.

JP-A-5-270524 International Publication No. 2010/150500

  These paper cup containers cannot be resealed and are suitable for use as containers for shampoos, rinses, body soaps, kitchen detergents, cleansers, etc. There wasn't.

  The present invention has been made in view of the above circumstances, and provides a paper cup container that has water resistance against water wetting from the outside and has resealability so as to be used around water. It is said.

The invention according to claim 1 of the present invention includes a cylindrical body member, a bottom member for sealing one opening of the cylindrical body member, and a resealable outlet provided in the other opening. A top member having
The trunk member blank and the bottom member blank forming the trunk member and the bottom member are composed of a paper layer and a thermoplastic resin layer provided on both sides of the paper layer, and the top member is formed by molding a synthetic resin. ,
The trunk member is formed at a lower end portion of the trunk member by folding the trunk member blank inward, and a trunk member bonding portion in which both end edges of the trunk member blank are overlapped and sealed. A lower folded portion, and an upper folded portion formed by folding an end portion of the folded body member blank inward, and the bottom member bends a peripheral portion of the bottom member blank downward. A peripheral bent portion,
The bent portion of the peripheral edge of the bottom member is inserted and sealed between the lower end portion of the barrel member and the upper folded portion, and the top member is fused to cover the end portion of the barrel member. It is a paper cup container characterized by this.

  In the invention according to claim 2 of the present invention, an edge extending portion in which the thermoplastic resin layer extends over a predetermined width is provided at both ends of the body member of the body member bonding portion. The paper cup container according to claim 1, wherein the paper cup container is provided.

  The invention according to claim 3 of the present invention is such that the end edge extending portion located inside the body member at the body member bonding portion is folded back to the outside of the body member and is between the edges. The paper cup container according to claim 2, wherein the paper cup container is located.

  In the invention according to claim 4 of the present invention, the edge extending portion located outside the body member in the body member bonding portion is in close contact with the outer surface of the body member located inside the overlapping portion. The paper cup container according to claim 2 or 3, wherein the paper cup container is provided.

  The invention according to claim 5 of the present invention is characterized in that the upper end between the upper folded portion and the lower folded portion is in contact with the flat portion of the bottom member. It is a paper cup container of description.

  The invention according to claim 6 of the present invention is characterized in that the fusion of the top member and the body member is performed by insert injection with the cylindrical body member set in a molding die. The paper cup container according to any one of claims 1 to 5.

  The invention according to claim 7 of the present invention is characterized in that a barrier layer is provided between the paper layer and the thermoplastic resin layer. It is a paper cup container.

  The paper cup container of the present invention has water resistance against water wetting from the outside and resealability so as to be used around water.

It is explanatory drawing which showed typically an example of the paper cup container of this invention with the longitudinal cross-section. It is explanatory drawing which shows the shape of the blank used for an example of the paper cup container of this invention. (A) trunk member blank, (B) bottom member blank. It is explanatory drawing which showed typically the trunk | drum member bonding part of an example of the paper cup container of this invention in the cross section. It is explanatory drawing which showed typically the method of producing the blank for trunk members of an example of the paper cup container of this invention.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 is an explanatory view schematically showing an example of a paper cup container of the present invention in a longitudinal section, and FIG. 2 is an explanatory view showing the shape of a blank used for an example of a paper cup container of the present invention. Blank, (B) blank for bottom member, FIG. 3 is explanatory drawing which showed typically the cross-section of the trunk | drum member bonding part of an example of the paper cup container of this invention.

  As shown in the longitudinal sectional view of FIG. 1, the paper cup container 100 of this example includes a cylindrical body member 1, a bottom member 2 that seals one opening of the cylindrical body member, and the other opening. And a top member 3 having a resealable take-out port.

  The body member 1 is formed in a cylindrical shape by sealing both ends of a rectangular body member blank 4 having a rectangular shape as shown in FIG. And the lower folding | turning part 6 formed in the lower end part of the trunk | drum member 1 by folding the trunk | blade member blank 4 inside, and the upper folding | turning formed by folding the end part of the folded trunk | blade member blank inside. Part 7 is provided.

The bottom member 2 is provided with a peripheral bent portion 9 by bending a peripheral portion of a circular bottom member blank 8 as shown in FIG. And the peripheral bending part 9 of the bottom member is inserted between the lower end part of the trunk | drum member 1, and the upper folding | turning part 7, and is sealed and sealed. Since it has such a configuration, the lower end surface of the trunk member and the end surface of the bottom member are surrounded by a hermetic seal, and water resistance against water wetting from the outside in this portion is ensured. The upper end between the lower folded portion 6 is in contact with the lower surface of the flat portion of the bottom member 2. Thereby, the lower part of the paper cup container 100 is reinforced, and even a heavy content such as liquid does not buckle.

  The top member 3 includes a top member main body 10 and a cap 11. The top member main body 10 includes a shoulder portion 12 and a mouth-and-neck portion 13. The mouth-and-neck portion 13 is open at the tip and is provided with a content outlet 14. It has been. A male screw 15 is provided on the outer periphery of the mouth-and-neck portion 13, and is screwed into a female screw 16 provided on the inner periphery of the cap 11. The lower end of the shoulder portion 1 of the top member 3 covers and fuses the upper end of the body member 1.

  The body member blank 4 that forms the body member 1 includes a paper layer 20, an outer thermoplastic resin layer 21 provided on the outer surface side of the paper layer 20, and an inner thermoplastic resin layer 22 provided on the inner surface side. It is made up of.

  The paper layer 20 can be a paperboard such as a cup base paper. For the outer thermoplastic resin layer 21 and the inner thermoplastic resin layer 22, a thermoplastic resin such as polyethylene, polypropylene, or ethylene-vinyl alcohol copolymer can be used.

  A barrier layer may be provided between the paper layer 20 and the outer thermoplastic resin layer 21 or between the paper layer 20 and the inner thermoplastic resin layer 22. As the barrier layer, a metal foil such as an aluminum foil may be provided, or a vapor deposition film obtained by vapor-depositing aluminum oxide or silicon oxide may be provided on the resin film. Moreover, you may provide stretched films or unstretched films, such as nylon with barrier property, polyesters, such as a polyethylene terephthalate, an ethylene-vinyl alcohol copolymer. Moreover, a printing layer can be provided in any layer outside the paper as required.

  Then, as shown in FIG. 2A, the outer thermoplastic resin layer 21 and the inner thermoplastic resin layer 22 are extended over the predetermined width from the paper layer 20 to the left and right ends of the body member blank 4 and fused. The edge extending portion 23 is provided so that when the body member 2 is formed into a cylindrical shape, the edge extending portion 23 comes to both ends of the body member 2 of the body member bonding portion 5. .

  An edge extending portion 23 a located inside the body member 2 at the body member bonding portion 5 is folded back to the outside of the body member and positioned between the edges, and enters the body member bonding portion 5. It is like that.

  Further, the edge extending portion 23 b located outside the trunk member 1 in the trunk member bonding portion 5 is in close contact with the trunk member 2 located inside the trunk member overlapping portion 5. Thus, in the body member bonding portion 5, the end portion is not exposed inside the paper cup container 100, the paper layer 20 is not wetted, and water resistance is ensured. Without being exposed, water resistance against water wetting from the outside is ensured.

  Hereinafter, the manufacturing method of the paper cup container 100 of this example is demonstrated.

  As shown in FIG. 4, the trunk member blank 4 is formed by allocating the trunk member blank shape 24 to a long paper 20 a such as a cup base paper to be the paper layer 20, and from the end of the paper layer 20 of the trunk member blank 4. A through-hole 25 is widely punched outside including a portion where the edge extending portion 23 is provided.

  And the outer side thermoplastic resin layer 21 and the inner side thermoplastic resin layer 22 are sequentially provided by the extrusion laminating method. By providing by the extrusion laminating method, the outer thermoplastic resin layer 21 and the inner thermoplastic resin layer 22 are fused at the portion of the through hole 25.

  When providing a barrier layer, the barrier layer and the outer thermoplastic resin layer 21 or the inner thermoplastic resin layer 22 are laminated, and the barrier layer surface is laminated with the paper layer 20 by a sandwich lamination method.

  A laminated body in which a paper layer 20 is provided with an outer thermoplastic resin layer 21 and an inner thermoplastic resin layer 22 is punched into a trunk member blank shape 24 to create a trunk member blank 4 having a shape as shown in FIG. To do.

  Further, the bottom member blank 8 is also formed by forming the outer thermoplastic resin layer 21 and the inner thermoplastic resin layer 22 on the paper layer 20 by extrusion laminating, punching out, and forming the bottom member blank 8 as shown in FIG. Create The blank 8 for the bottom member is formed into the bottom member 2 provided with the peripheral bent portion 9 by bending the peripheral portion downward.

  Of the left and right end edges of the body member blank 4, the edge extending portion 23 a located inside the one body member 2 is folded back to the outside of the body member 1 and overlapped on the outside of the other edge, The end extending portion 23b of the end edge of the cylinder is stretched as it is, outside the one body member 2, and fused to provide the body member bonding portion 5, thereby forming the cylindrical body member 1.

  The cylindrical barrel member 1 is set in an insert injection molding die, and a thermoplastic synthetic resin is injected into the molding die to mold the top member main body 10, and at the same time, the upper end face of the barrel member 1 is covered. In this manner, the body member 1 is fused. Separately, the cap 11 that has been manufactured by injection is screwed and attached with the male screw 15 and the female screw 16 to manufacture the top member 3.

The body member 1 to which the top member 3 is fused is filled with the contents with the top member 3 side down. And the bottom member 2 is attached to the trunk | drum member 1 as follows, and the filled paper cup container 100 is manufactured.

  In order to attach the bottom member 2 to the body member 1, first, the tubular body member 1 is folded inward to form the lower folded portion 6 at the lower end. Further, the upper folded portion 7 is formed by folding the end portion of the folded body member 1 inward.

  Between the upper folded portion 7 and the lower end portion of the outer body member 1, the lower end portion of the body member 1, the peripheral folded portion 9, the upper folded portion 7, and the lower folded portion 6 are inserted. The paper cup legs are formed by fusing. At this time, the upper end between the upper folded portion 7 and the lower folded portion 6 is brought into contact with the lower surface of the flat portion of the bottom member 2.

  When the upper end between the upper folded portion 7 and the lower folded portion 6 is in contact with the lower surface of the flat portion of the bottom member 2, the strength of the leg portion of the paper cup is improved and even a heavy content can buckle. Absent. In addition, the basis weight of the paper can be reduced accordingly.

  Another method for manufacturing the paper cup container 100 of this example will be described.

  It is the same until the cylindrical body member 1 is manufactured, but in the insert injection, a ring of thermoplastic synthetic resin is fused to the body member 1 so as to cover the end surface of the upper end of the body member 1, Install.

  The bottom member 2 is attached to the body member 1 to which the synthetic resin ring is fused. The attachment method is the same as that described above. In this way, the contents are filled into the body member 1 to which the bottom member 2 is attached.

  The top member main body 10 other than the synthetic resin ring, which has been separately molded, is fused to the synthetic resin ring by ultrasonic sealing or the like to complete the top member main body 10, and the separately molded cap 11 is male. The filled paper cup container 100 is manufactured by screwing the screw 15 and the female screw 16 together.

  In this example, the body member has a cylindrical shape, but it may have an inverted truncated cone shape or a truncated cone shape. Moreover, it is good also as a square cylinder shape made into polygons, such as a quadrangle with a square cross section, a reverse polygon frustum shape, and a cylinder shape of a polygon frustum shape.

  Moreover, although the top member is provided with a screw cap, it may be provided with a hinge cap, or may be a top member provided with a dispenser (a liquid dispensing device).

DESCRIPTION OF SYMBOLS 100 ... Paper cup container 1 ... Body member 2 ... Bottom member 3 ... Top member 4 ... Body member blank 5 ... Body member bonding part 6 ... Lower folding part 7- ··· Upper folded portion 8 ··· Blank 9 for bottom member · · · Folded portion 10 · · · Top member main body 11 ··· Cap 12 · · · Shoulder portion 13 · · · neck and neck portion 14 · · · Port 15 ... male screw 16 ... female screw 20 ... paper layer 20a ... long paper 21 ... outer thermoplastic resin layer 22 ... inner thermoplastic resin layers 23, 23a, 23b ... End edge extension 24 ... Blank shape for body member 25 ... Through hole

Claims (7)

It consists of a cylindrical body member, a bottom member that seals one opening of the cylindrical body member, and a top member that has a resealable outlet provided in the other opening,
The trunk member blank and the bottom member blank forming the trunk member and the bottom member are composed of a paper layer and a thermoplastic resin layer provided on both sides of the paper layer, and the top member is formed by molding a synthetic resin. ,
The trunk member is formed at a lower end portion of the trunk member by folding the trunk member blank inward, and a trunk member bonding portion in which both end edges of the trunk member blank are overlapped and sealed. A lower folded portion, and an upper folded portion formed by folding an end portion of the folded body member blank inward, and the bottom member bends a peripheral portion of the bottom member blank downward. A peripheral bent portion,
The bent portion of the peripheral edge of the bottom member is inserted and sealed between the lower end portion of the barrel member and the upper folded portion, and the top member is fused to cover the end portion of the barrel member. Paper cup container characterized by.   The edge extension part by which the said thermoplastic resin layer was extended over predetermined width was provided in the both-ends edge of the trunk | drum member of the said trunk | drum member bonding part, The Claim 1 characterized by the above-mentioned. The paper cup container described.   3. The edge extending portion located on the inside of the body member at the body member bonding portion is folded back to the outside of the body member and located between the edges. The paper cup container described.   3. The edge extending portion located outside the body member in the body member bonding portion is in close contact with an outer surface of the body member located inside the overlapping portion. Or the paper cup container of Claim 3.   5. The paper cup container according to claim 1, wherein an upper end between the upper folded portion and the lower folded portion is in contact with a flat portion of the bottom member.   The fusion of the top member and the body member is performed by insert injection with the cylindrical body member set in a molding die. A paper cup container according to 1.   The paper cup container according to any one of claims 1 to 6, wherein a barrier layer is provided between the paper layer and the thermoplastic resin layer.

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