Inmold labeled container and molding process thereof

Abstract

The objects of this invention are to set a predetermined height position for the portion of parison or preform that is the first to come in contact with body molding planes of a split mold and to prevent air from being trapped between in-mold labels and the container which is blow molded from the parison or the preform. In-mold labels 7 are fixed to the entire outer surface of body 4 of main container 1. An annular thinnest wall portion 4a is formed in the wall of the body 4 so that the thinnest wall portion 4a is the first to come in contact with the body molding planes 14 of a split mold 13. Under this construction, no bulge of air is formed between the body 4 and the in-mold labels 7 fixed to the entire surface of the body 4.

Description

TECHNICAL FIELD[0001]This invention relates to an in-mold labeled container having an in-mold label or labels firmly fixed to entire outer surface of body, and to a molding process thereof,BACKGROUND ART[0002]As a means of applying a label bearing a decorative pattern, a product name, and / or instructions onto the surface of a blow molded synthetic resin container, there are many types of labels on which decorative patterns, product names, and / or instructions are printed, and which are glued on the body surfaces of the containers.[0003]These labels to be applied to the containers have excellent display effects because decorative patterns, product names, and instructions can be printed favorably on the labels. Since the work of applying labels to the container body surface is a completely independent process step, there has to be an additional process of operation required for the products to be finished. Moreover, these labels inevitably create slight unevenness or a step between the...

AI Technical Summary

Benefits of technology

[0034]This invention having the above-described construction has the following effects:According to the invention of claim 1, the body comprises a thinnest wall portion and other portions. Since the thinnest wall portion and other portions are different in the timing of contact with the body molding planes, no bulge of air is formed between the blow molded body and the in-mold labels. As a result, the in-mold labels are fixed to the body strongly and stably, and the container can maintain a good shape which has not been degraded by bulges of air.

[0035]The height position of the thinnest wall portion of the body can be accurately determined so that this portion is disposed at right positions opposed to the in-mold labels held on the body molding planes of the split mold. It is also possible to govern the behavior of the body and set the timing of contact in advance almost accurately when the body expanding in the process of blow molding pushes the in-mold labels against the body molding planes. Therefore, the in-mold labels can be fixed properly to the body.

[0036]According to the invention of claim 2, the in-mold labels can be held at right positions opposed to the body molding planes of the split mold. Since the in-mold labels can be held in place by the split mold safely in high precision, the in-mold labels are fixed around the entire outer surface of the body, and this structure of labels on the body can be obtained easily and reasonably.

[0037]According to the invention of claim 3, the container has a high decorative effect because almost entire outer surface of the body is clad with the in-mold labels. This decorative effect can be fulfilled when the almost entire surface of the body is used as a display area once the in-mold labels have been firmly fixed to the body. The in-mold labels covering almost entire outer surface of the body can also be utilized as a reinforcing material for the body, thus allowing containers to have thinner wall.

[0038]According to the invention of claim 4, there can be different displays of in-mold labels for the upper area and the lower area of the body. This configuration gives the container large changes in the decorative displays by means of the in-mold labels. For instance, highly distinctive, individualized decorations can be displayed.

[0039]According to the invention of claim 5, the peripheral raised ribs enhance mechanical strength of the body. In addition, since the in-mold labels are fixed firmly to the body, the mechanical strength of the body equipped with in-mold labels can be fully increased. These peripheral ribs are also useful to protect the decorative displays of the in-mold labels indirectly. This effect is notably achieved if the body has a straight cylindrical shape.

Problems solved by technology

Moreover, these labels inevitably create slight unevenness or a step between the body surface and label edges, and this step may have negative effects on the container appearance and the feel of touch.

In addition, with a trend toward thin wall of the container body, there were discontent and inconvenience concerning labels because it becomes more and more difficult to apply labels firmly and stably to thin body wall.

In addition, the in-mold labels are given a light blocking effect or an oxygen barrier property so that the container can block the light or does not allow oxygen to pass through the body wall.

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