JPH02167721A - Production of vessel attached with label - Google Patents

Abstract

PURPOSE:To solve the generation of deformation of a label part by placing a molded vessel attached with label in the high-humidity atmosphere or atomizing steam or water thereto. CONSTITUTION:A label A made of paper with an adhesive layer provided to the rear thereof is attached on the inner face of a molding die B and thereafter a parison C heated at molding temp. is extruded into the molding die. After the molding die is clamped and blow molding is performed, a molded vessel attached with the label is placed in the high-humidity atmosphere. Further steam or water is atomized to the vessel attached with the label. In the blow molded vessel D attached with the label, the part excepting the label part is contracted just after molding and the label part is uncontracted and therefore the label part is swelled and made a deformed state. In such a way, the deformed vessel D is placed in the high-humidity atmosphere or steam or water is atomized thereto. Thereby the label part is contracted similarly to the other part of the vessel and therefore the swelled shape of the label part is returned to the original shape and deformation is recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for manufacturing a labeled container in which a paper label is integrated at the same time as the container is formed.

<Prior art> In order to indicate the contents stored or to enhance the decoration, it is common to use a label coated with adhesive on the outside of a molded plastic container. .

In addition, in recent years, after molding plastic containers, it is necessary to attach a label to the container, and the container and label are not integrated. A container has been proposed and put into practical use.

On the other hand, when manufacturing plastic containers, they are manufactured in a heated state, and when they are cooled to outside temperature after manufacturing,
The container has shrunk.

Therefore, when manufacturing a container with a predetermined capacity, shrinkage has been taken into account during container manufacturing, and a mold that is larger by the amount of shrinkage has been used to manufacture the container.

In order to decorate the container, a label is attached to the container body after the container is manufactured.

At this time, even if a paper label is used as a decorative label, which can easily be printed with a pattern and has a glossy surface, the shrinkage of the container has almost finished, and the label and container are tightly bonded. Due to the small degree, the container remained in the desired shape.

However, when a paper label is integrated during container manufacturing, the container shrinks after manufacturing, but the paper label does not, so only the label portion swells, resulting in deformation.

<Problem to be solved by the invention> As described above, paper labels have excellent decorative properties, are inexpensive, and are easy to handle. There was a problem with deformation.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a labeled container that eliminates deformation of the label portion even in a container in which a paper label is integrated at the same time as the container is molded.

<Means for Solving the Problems> The present invention adsorbs a paper label with an adhesive layer on the back surface to the inner surface of a mold, extrudes the parison heated to a molding density into the mold, and then This method of manufacturing a labeled container is characterized by tightening the mold, then performing blow molding, and then placing the molded labeled container in a high humidity atmosphere.

Further, there is a method for producing a labeled container in which steam or water is sprayed onto the labeled container.

Effect> Immediately after molding, a labeled container that has been blow-molded contracts in a portion below the label portion, whereas the label portion does not contract, resulting in a deformed state in which the label portion swells.

However, if a container that has been deformed in this way is exposed to a high-humidity atmosphere or sprayed with steam or water, the label part will shrink in the same way as other parts of the container, so the swollen shape of the label part will return to its original shape. , the deformity is repaired.

<Example 1> As shown in Figure 1, label paper (Super Tokre 85
Heat-sensitive adhesive AD33DW1 on the back side of special paper
After placing label A made of 790 (manufactured by Toyo Morton) in mold B, parison C made of high density polyethylene is placed.
was blow-molded into a predetermined shape in a mold to produce a container with a label as shown in FIG.

The full water capacity of the molded container was 258.7 d, and the capacity of the unlabeled container was 241.2 d, and bulge was observed in the label portion of the container.

When this container was kept in a 70% atmosphere at 40° C. for 24 hours, the container capacity became 244.1 + ml, and the bulge at the label part disappeared.

<Example 2> When water vapor at 80°C was sprayed for 20 seconds on a labeled container molded in the same manner using the same label as in Example 1, the full water capacity of the molded container was 258.7 m. However, the volume was 245.3 ml, and the bulge in the label area was eliminated.

<Effects of the Invention> According to the method of the present invention, the shaped labeled container has -
Initially, the label part will be in a swollen state, but then it can be placed in a high humidity atmosphere or sprayed with steam or water.
The deformation of the label part has been resolved.

In this way, even with conventionally labeled containers using paper labels with excellent characteristics as labels, there is no bulge in the label part, and the labeled containers with excellent decorativeness and gloss can be separated after container molding. There is no need to attach labels during the process, which shortens the process and makes it possible to manufacture at a low cost.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the method for manufacturing a container of the present invention, and FIG.
The figure is an explanatory diagram showing an example of a container manufactured according to the present invention, with the label section cut away. A... Label B... Molding mold C... Parison D... Container Applicant: Toppan Printing Co., Ltd. Representative: Kazuo Suzuki

Claims (2)

[Claims] (1) After adsorbing a paper label with an adhesive layer on the back side to the inner surface of the mold, extrude the parison heated to the molding temperature into the mold, tighten the mold, and then perform blow molding. ,
A method for producing a labeled container, which comprises placing a molded labeled container in a high humidity atmosphere. (2) The method for producing a labeled container according to claim (1), wherein steam or water is sprayed onto the blow-molded labeled container.