JP2004067217A - In-mold label container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-mold label container including a swell part swelling in the circumferential direction of a sidewall without causing wrinkles on an in-mold label. <P>SOLUTION: The in-mold label container is structured by sticking the in-mold label to the approximately entire surface of the sidewall of a bottomed container with an opening having a flange on one of its sides. The sidewall consists of a first line extending from the bottom along a virtual sidewall which is assumed to be in the form of a longitudinal section line extending from the bottom toward the flange, a curve continuous with the first line to swell outward, and a second line continuous with the curve to extend in parallel to the virtual sidewall, reaching the lower part of a neck. The curve has the maximum swell having a diameter of a cross section of the curve swelling from the virtual sidewall of 102 to 110% when the diameter of a virtual cross section formed by the virtual sidewall crossing with the cross section of the curve is assumed to be 100. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an in-mold label container, and more particularly, to an in-mold label container having a bulging portion bulging in a circumferential direction at a substantially central portion of a side wall of the container.
[0002]
[Prior art]
Conventionally, as an in-mold label container, a circular bottom wall and a side wall having a circular cross section in which one inner peripheral end portion is connected to the peripheral edge of the bottom wall, and a flange portion is connected to the other peripheral edge of the side wall. 2. Description of the Related Art A bottomed container having an opening on one side, which has a cylindrical shape or an inverted truncated cone shape, is known. In the in-mold label container, a label having a thermo-adhesive resin layer is placed in a mold, injection resin is injected into the mold, and the heat of the resin melts the thermo-adhesive resin layer of the label to simultaneously form the label. The label is bonded and fixed to the surface of the side wall.
[0003]
The in-mold label container as described above is capable of performing beautiful printing on a label, and is excellent in an appealing effect, and is lightweight, clean, and easy to handle, such as beverages such as coffee and juice, or Is widely used as a container for foods such as yogurt, jelly and pudding.
[0004]
However, most of the in-mold label containers used as containers for the above-mentioned foods have a cylindrical shape or an inverted truncated cone shape, although there is a difference in size, and are dissatisfied in terms of differentiating products. What remained. On the other hand, vertically long and slim containers, such as those typically used for beverages such as coffee and juice, have a problem that they have a sense of stability when held by hand because the side walls are straight. There was a demand for a solution.
[0005]
As a solution to the above problem, for example, there is a container Y as shown in FIG. 4 in which a constricted portion B is provided at a substantially central portion of a side wall in a circumferential direction. In the case of an in-mold label container in which an in-mold label is stuck on the entire surface of the side wall, although not shown, a problem that wrinkles occur in the in-mold label occurs. However, a method of attaching a tack seal label to the side wall surface after forming the container, or covering the entire side wall surface or the entire outer surface of the container by using a heat shrinkable film, is adopted. It was quite troublesome compared to the container.
[0006]
[Problems to be solved by the invention]
Accordingly, a first object of the present invention is to provide a novel in-mold label container having a bulging portion that bulges in the circumferential direction of a side wall without wrinkling the in-mold label, A second object is to provide a novel in-mold label container capable of differentiating products and providing a sense of stability when held by hand.
[0007]
In order to attain the above object, the present invention according to claim 1 has a substantially circular bottom wall and a circular cross section having one inner peripheral end connected to a peripheral edge of the bottom wall. An in-mold label is attached to substantially the entire surface of the side wall of a bottomed container having an opening at one of a substantially cylindrical shape or a substantially inverted truncated cone shape having a side wall and a flange connected to the other peripheral edge of the side wall. The in-mold label container has a bottom outer diameter of 30 to 100 mmφ and a flange neck lower outer diameter of 40 to 120 mmφ, and the side wall extends from the bottom toward the flange portion. Assuming a virtual virtual side wall extending vertically or wider than vertical and having a vertical cross section that is wider than the vertical, a first vertical cross section along the virtual side wall along the virtual side wall and a bulge outward outward from the first linear section along the vertical cross section. The longitudinal section curve and A vertical cross-section second linear portion extending parallel to the virtual side wall and extending to the lower part of the neck following the vertical cross-section curved portion, the vertical cross-section curved portion bulging from the virtual cross-section linear virtual wall; The vertical cross section having a maximum bulge portion where the diameter of the virtual cross section formed by the virtual side wall formed by the linear cross section that crosses the horizontal cross section is 100 to 102% when the diameter of the virtual cross section is 100. It is a curved portion. With this configuration, it is possible to provide a container having a bulging portion bulging in the circumferential direction at a substantially central portion of the side wall of the container without causing a problem that the in-mold label is wrinkled. Since the container has excellent stability and can be supported by the bulging portion when held by hand, an in-mold label container having a sense of stability can be obtained. In addition, since the in-mold label is provided all around the side wall surface of the container at the same time as molding, a tack seal label conventionally used in this type of container must be attached to the side wall surface, or by using a heat shrinkable film. This eliminates the need to cover the entire periphery of the side wall surface or the entire outer surface of the container.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described in detail below with reference to the drawings and the like.
FIG. 1 is a perspective view showing an embodiment of an in-mold label container according to the present invention, FIG. 2 is a diagram schematically showing a longitudinal section of FIG. 1, and FIG. It is a longitudinal cross-sectional view for explaining the point, 1 in an in-mold label container, 2 is a bottom wall, 3 is a side wall, 4 is a flange part, 5 is a thread bottom, 10 is an in-mold label, and 31 is a longitudinal section. 1st linear part, 32 is a vertical curved section, 33 is a longitudinal second linear part, A is a bulge, I is a virtual side wall, R and r are diameters, S is a cross section, α is a bottom, and β is a neck. The lower part is shown.
[0009]
FIG. 1 is a perspective view showing an embodiment of an in-mold label container according to the present invention, and FIG. 2 is a view schematically showing a longitudinal section of FIG. And a side wall 3 having a circular cross section with one inner peripheral end connected to the peripheral edge of the bottom wall 2 and a flanged part 4 connected to the other peripheral edge of the side wall 3. A bottomed container having an opening, wherein a bulging portion A bulging in the circumferential direction is provided at a substantially central portion of the wall surface 3 and an in-mold label 10 is attached to substantially the entire surface of the side wall 3. It was done. In addition, a thread bottom 5 is formed below the circular bottom wall.
[0010]
FIG. 3 is a vertical cross-sectional view for explaining the design points of the in-mold label container according to the present invention. The in-mold label container 1 has a bottom α of the side wall 3 (corresponding to a peripheral edge of the bottom wall 2). The outer diameter of the neck portion β of the flange portion 4 is 40 to 120 mmφ, and the side wall 3 of the in-mold label container 1 is separated from the bottom α by the flange. Assuming a vertical virtual wall I extending vertically or wider than vertical extending in the direction of the portion 4, a first vertical linear section 31 and a first vertical linear section 31 extending from the bottom α along the virtual side wall I And a second straight line section extending vertically parallel to the imaginary side wall I and extending to the neck lower part β. 33, vertical section The diameter R of the imaginary cross section formed by the imaginary side wall I having a vertical cross section linearly crossing the cross section S has a diameter R of the cross section S of the vertical cross section curve portion 32 bulging from the linear imaginary side wall I. By designing so as to have a maximum bulge of 102 to 110%, preferably 102 to 105% when r is 100, a container without wrinkles in the in-mold label can be obtained.
[0011]
Next, the material forming the in-mold label container 1 will be described. The in-mold label container 1 includes a container molding resin for molding the container and an in-mold label 10. The container molding resin is not particularly limited as long as it is a thermoplastic resin that can be injection-molded. For example, a resin such as polypropylene, polyethylene, or polystyrene can be used.
[0012]
Further, the in-mold label 10 generally includes a printing base material layer and an adhesive layer capable of adhering to the above-described container molding resin. The printing base material layer used in the present invention is preferably a film which can be printed and which can be stretched to some extent by the heat of the resin at the time of injection molding. For example, biaxially oriented polypropylene (hereinafter referred to as OPP) And an unstretched polypropylene film (hereinafter, referred to as a CPP film), a polystyrene film (hereinafter, referred to as a PS film), and synthetic paper.
[0013]
The adhesive layer is not particularly limited as long as it can be bonded to the container molding resin, and is usually a resin of the same type as the container molding resin, for example, polypropylene, polystyrene, ethylene-vinyl acetate. Synthetic resin film obtained by co-extrusion or coating of a resin such as a polymer (hereinafter referred to as EVA), or a film made of a resin similar to the container molding resin, for example, CPP film, undrawn polyethylene Film (hereinafter, referred to as PE film), PS film, ethylene-vinyl acetate copolymer (hereinafter, referred to as EVA) film, or a heat-sealing agent obtained by forming a solution of the same resin as the resin for forming the container ( Hereinafter, it is referred to as an HS agent).
[0014]
As an example of a specific layer configuration of the in-mold label 10, when the container molding resin is a propylene resin, for example, a CPP film (printing substrate layer) / printing layer / CPP film, a CPP film (printing base). Material layer) / printing layer / HS agent layer (chlorinated polypropylene), printing layer / synthetic paper (manufactured by Oji Yuka Co., Ltd .: Yupo FGS (trade name)), OPP (printing substrate layer) / printing layer / aluminum Foil / single-sided sealing OPP, OPP (printing substrate layer) / printing layer / single-sided sealing OPP, printing layer / single-sided sealing OPP, OPP (printing substrate layer) / printing layer / HS agent layer (chlorinated polypropylene) In the case where the container molding resin is an ethylene resin, for example, CPP film (printing substrate layer) / printing layer / PE film, CPP film (printing) Base layer) / printing layer / HS agent layer (chlorinated polyethylene or EVA), printing layer / synthetic paper (manufactured by Oji Yuka Co., Ltd .: Yupo ITE (trade name)), OPP (printing base layer) / printing Layer / single-sided sealing OPP, OPP (printing substrate layer) / printing layer / HS agent layer (chlorinated polyethylene or EVA), etc., and when the container molding resin is a styrene resin. For example, for example, CPP film (print base layer) / print layer / HS agent layer (acrylic resin or EVA resin), PS film (print base layer) / print layer / PS film, print layer / synthetic paper [ Manufactured by Oji Yuka Co., Ltd .: Yupo FGS (trade name)], OPP (printing substrate layer) / printing layer / HS agent layer (acrylic resin or EVA resin), and the like. Examples of the single-sided sealing OPP include FOH (trade name) manufactured by Nimura Chemical Industry Co., Ltd. and P-3162 (trade name) manufactured by Toyobo Co., Ltd.
[0015]
When the in-mold label 10 is required to have a gas barrier property, a configuration in which a gas barrier layer, for example, a saponified ethylene-vinyl acetate copolymer or polyvinylidene chloride is provided on the outer surface side of the adhesive layer. It is good. The in-mold label 10 is formed by a known laminating method or a coating method such as dry lamination, extrusion lamination, extrusion coating, and other coating methods in accordance with a conventional method.
[0016]
【The invention's effect】
As described in detail above, the present invention, by adopting the structure described in claim 1, provides a novel ink mold having a bulging portion that bulges in the circumferential direction of the side wall without wrinkling the in-mold label. A mold label container can be easily obtained. Furthermore, by providing a bulging portion, it is possible to provide a novel in-mold label container that can be a design that enables differentiation of products and can impart a sense of stability when held by hand. Can be.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of an in-mold label container according to the present invention.
FIG. 2 is a diagram schematically showing a longitudinal section of FIG. 1;
FIG. 3 is a vertical cross-sectional view for explaining a design point of the in-mold label container according to the present invention.
FIG. 4 is a view showing an example of a conventional container.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 In-mold label container 2 Bottom wall 3 Side wall 4 Flange part 5 Thread bottom 10 In-mold label 31 Longitudinal section first straight part 32 Longitudinal section curved part 33 Longitudinal section second straight part A Swelling part I Virtual side wall S Cross section R, r Diameter α Bottom β Lower neck

Claims (1)

A substantially circular bottom wall and a substantially cylindrical or substantially inverted cone in which a flange is connected to the other peripheral edge of the side wall having a circular cross section having one inner peripheral end connected to the peripheral edge of the bottom wall. An in-mold label container having an in-mold label attached to substantially the entire side wall surface of a bottomed container having an opening on one side having a trapezoidal shape, wherein the in-mold label container has a bottom outer diameter of 30 to 100 mmφ and the outer diameter of the lower part of the flange portion is 40 to 120 mmφ, and the side wall extends from the bottom to the flange portion. A first straight section having a longitudinal section along the virtual side wall, a longitudinal section curved section bulging outward continuously to the first section linear section, and a parallel to the virtual side wall continuing to the longitudinal section curve section; Extend under the neck A vertical cross-sectional linear portion, which has a vertical cross-sectional second linear portion, and bulges from the virtual cross-sectional linear portion of the virtual cross-sectional curved portion, the cross-sectional diameter of which crosses the horizontal cross-section. An in-mold label container characterized in that it is the vertical section curved portion having a maximum bulge portion of 102 to 110% when the diameter of a virtual cross section formed by the above is 100.

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