JP2001328138A - In-mold labelled container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an in-mold labelled container to which a label is accurately arranged at a predetermined position. SOLUTION: The in-mold labelled container 10 has a flange portion 12, a body portion 11 and a bottom portion 13 and consists of the label 21 arranged in the body portion 11 and an injected resin 20. The body portion 11 consists of a label holding part 11a including the label 21 and a base end part 11b of which the diameter smaller than that of the label holding part 11a. A stepped part 15 is formed between the label holding part 11a and the base end part 11b and the lower end of the label 21 is positioned in the vicinity of the stepped part 15. The radial projecting length of the stepped part 15 is 1.5 times or more the wall thickness of the label holding part 11a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-mold label container having a label disposed in an injection resin, and more particularly to an in-mold label which can be formed with high precision by arranging the label at an appropriate position in the injection resin. For containers.

[0002]

2. Description of the Related Art Hitherto, an in-mold label container having a flange portion, a body portion, and a bottom portion has been known. Such an in-mold label container is formed by placing a label in a mold and injecting an injection resin into the mold, and the label is placed on the outer surface of the body.

[0003] The body comprises a small-diameter portion on the bottom side and a large-diameter portion on the flange side connected to the small-diameter portion via a step. When a step is provided on the body, the step may cause a change in the flow of the injection resin, and the label may not be arranged at a predetermined position.

[0004] The present invention has been made in view of such a point, and an object of the present invention is to provide an in-mold label container in which a label can be appropriately arranged at a predetermined position.

[0005]

According to the present invention, there is provided an in-mold label container having a flange, a body, and a bottom, wherein a label is disposed in the body, wherein the body comprises a label holding portion including the label. And a base portion with a smaller diameter than the label holding portion, provided at the bottom side of the label holding portion with a step portion, a gate is formed at the bottom portion, and the end of the label is arranged corresponding to the step portion An in-mold label container characterized in that:

According to the present invention, by causing the end of the label to correspond to the step, the injection resin is directed outward in the radial direction near the step. Therefore, the label can be pressed outward by the injection resin, and the label can be securely arranged on the outer surface of the label holding portion.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing an embodiment of an in-mold label container according to the present invention. As shown in FIGS. 1 to 3, the in-mold label container 10 includes a body 11 having a flange 12 and a bottom 13.
The label 21 is disposed in the body 11 and is formed of the injection resin 20 as a whole.

The body 11 includes a label holding portion 11a including the label 21 and a base end portion 11b provided on the bottom side of the label holding portion 11a with a step 15 therebetween.
The base end portion 11b has a smaller diameter than the label holding portion 11a.

A gate 16 is provided on the outer surface of the bottom 13 substantially at the center of the bottom 13 to indicate the trace of the injection of the injection resin 20.

The in-mold label container 10 having such a configuration is formed by a molding die including a male mold 1 and a female mold 2 as shown in FIGS. 1 (a) and 1 (b). In this case, the step portion 15 of the body 11 has a radial protrusion length l, and the radial protrusion length 1 is 1.5 times or more the thickness t of the label holding portion 11a. The lower end of the label 21 is located in the vicinity of the step portion 15, and a gap g is formed between the lower end of the label 21 and the female die 2.

Next, the material of the in-mold label container 10 will be described. The in-mold label container includes an in-mold label 21 and an injection resin. The in-mold label 21 generally includes a printing base material layer, a gas barrier layer, and an adhesive layer with the injection resin. Each of these layers can be formed independently by forming a film and laminating (dry lamination) via an adhesive, or by melt-extruding (EC, co-extrusion) a part or all of the layers. . Further, the gas barrier layer can be omitted depending on the use and purpose.

The film as the printing substrate is not particularly limited as long as it is generally printable, and for example, a polyester film, a polypropylene film, a nylon film and the like can be appropriately used.

As the gas barrier layer, for example, (a)
Aluminum foil (7 to 25 μm), (b) a metal or metal oxide laminated on a plastic film or the like by vapor deposition or the like, for example, silicon oxide vapor-deposited plastic film, aluminum oxide vapor-deposited plastic film, aluminum vapor-deposited plastic film, (c) In addition, polyacrylonitrile resin,
EVOH (saponified ethylene vinyl acetate copolymer), P
Examples thereof include a VDC (polyvinylidene chloride) film, a PVDC-coated biaxially stretched plastic film, and the like, which can be appropriately selected depending on desired performance.

The adhesive layer is not particularly limited as long as it adheres to the injection resin, but is usually made of a plastic such as the same material as the injection resin, or a polyethylene containing EVA (ethylene / vinyl acetate copolymer). A resin having
Alternatively, a plastic film or the like in which those resins are co-extruded or coated is preferably used.

Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method or another coating method according to a conventional method.

As the injection resin for molding the in-mold label container body of the present invention, a thermoplastic resin, for example, polypropylene, polyethylene, polystyrene or the like is used.

Next, a method of manufacturing the in-mold label container will be described. First, the label 21 is inserted into the molding cavity 3 including the male mold 1 and the female mold 2. In this case, FIG.
(A) As shown in (b), the lower end of the label 21 and the female mold 2
Is formed between them. Next, injection resin 20 is injected into the cavity 3 between the male mold 1 and the female mold 2 from the gate opening (not shown) of the female mold 2.

The injection resin 20 flows from a portion corresponding to the bottom portion 13 of the cavity 3 to a portion corresponding to the base end portion 11b, and thereafter reaches a portion corresponding to the step portion 15. At this time, a gap g is formed between the lower end of the label 21 and the female mold 2. However, since the radially protruding length 1 of the step portion 15 is 1.5 times or more the thickness of the label holding portion 11a, The injection resin 20 which has reached the portion corresponding to the step portion 15 of the cavity 3 flows outward in the radial direction as shown in FIG. 1A and presses the lower end portion of the label 21 outward in the radial direction. Therefore, the label 21 is accurately pressed against the inner surface of the female mold 21,
As a result, the label 21 becomes the label holding portion 1 of the body 11.
1a is precisely arranged on the outer surface (predetermined position) of FIG.
(B)).

On the other hand, when the radially protruding length 1 of the step portion 15 is relatively small (FIG. 4A), the injection resin 20 at the lower end of the label 21 may be all directed outward in the radial direction. However, it is also conceivable that they are divided in two directions. When the label 21 is divided in two directions as described above, the label 21 cannot be accurately pressed against the inner surface of the female mold 21. Therefore, the label 21 is disposed in the label holding portion 11a without being disposed on the outer surface. The position becomes unstable.

As described above, according to the embodiment of the present invention, the length l of the stepped portion 15 of the body 11 in the radial direction is set to 1.5 times or more the thickness of the label holding portion 11a. In a portion corresponding to the step 15 in the cavity 3 between the male mold 1 and the female mold 2, the label 21 is applied to the injection resin 20.
Thereby, it can be pressed against the inner surface of the female mold 2. For this reason, it is possible to obtain the in-mold label container 10 in which the label 21 is accurately arranged on the outer surface (predetermined position) of the label holding portion 11a of the body portion 11.

[0021]

As described above, according to the present invention, a label can be accurately arranged on the outer surface of a label holding portion. Therefore, in-mold label container 1 having a label
0 can be obtained with high accuracy.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of an in-mold label container according to the present invention.

FIG. 2 is a perspective view showing an embodiment of an in-mold label container.

FIG. 3 is a side sectional view showing an embodiment of an in-mold label container.

FIG. 4 is a view showing a comparative example of an in-mold label container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 In-mold label container 11 Body 11a Label holding part 11b Base end part 12 Flange part 13 Bottom part 15 Step part 20 Injection resin 21 Label

Claims (2)

[Claims] 1. An in-mold label container having a flange portion, a body portion, and a bottom portion, wherein a label is disposed in the body portion, wherein the body portion has a label holding portion including a label and a bottom side with respect to the label holding portion. The label is characterized by being provided with a stepped portion, a base end portion having a smaller diameter than the label holding portion, a gate formed at the bottom portion, and the end portion of the label corresponding to the step portion. In-mold label container. 2. The label according to claim 1, wherein a length of the stepped portion in the radial direction is at least 1.5 times a thickness of the label holding portion.
The in-mold label container according to the above.