JPH0710560B2 - Labeled bottle manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method for producing a labeled bottle, and particularly to blow (including stretch blow) molding of a synthetic resin bottle such as polyethylene, polypropylene or polyester. At the same time, the present invention relates to a method for producing a labeled bottle that is suitable for integrally adhering to an outer surface such as a body of a bottle and gives a high-class feeling.

<Prior Art> Conventionally, as a container for storing various contents, a bottle formed by blow molding a synthetic resin has been used in terms of protection of contents and easy handling. Then, a label provided with a printing layer for displaying contents and displaying a product name is usually adhered to the outer surface of the body of the bottle after molding the bottle.
However, in order to provide the label after molding the bottle in this way, it has to be performed in another step, which is inefficient. Further, there is a problem that a step is inevitably formed on the boundary surface between the bottle surface and the label, and the label end or the entire label is peeled off during handling during transportation, storage, etc. to reduce the product value or make it unusable as a defective product. There is.

Therefore, as a method of solving such a problem, there is a method of inserting a label in advance in a blow molding die and attaching a label to the outer surface of the bottle body at the same time as the blow molding of the bottle (hereinafter, referred to as an in-mold label system). is there. This in-mold label system has many advantages such as rationalization of the process, cosmetic appearance of the molded bottle, and cost reduction of materials, and it seems that the number of practical examples tends to increase in the future.

The bottle molding method using the in-mold label system generally extrudes a parison continuously from an extruder, cuts this into a certain length, and sets it in a mold in which a label is previously inserted on the inner surface. Blow, integrate the label on the outer surface of the bottle to be molded, or preform a preform such as polyester by injection molding in advance, after adjusting the temperature,
The label is set in a mold in which a label is inserted in advance and stretch-blown to integrate the label with the outer surface of the bottle to be molded.

The label used in this in-mold label system is generally a paper or plastic film coated with a heat-sensitive adhesive. When using this label, for example, when making a polyethylene bottle as a plastic, if the bottle has a surface with a wart pattern, there is no sense of synchronization between the bottle and the label or the surface of the label is smooth so it does not slip. There was a problem that it was easy to hold.

<Problems to be Solved by the Invention> The present invention has been conceived in order to solve the above-mentioned problems of the prior art, and has a label that gives a feeling of flocking and a high-class feeling that can be synchronized with the grain pattern of the bottle. An object is to provide a bottle manufacturing method.

<Means for Solving the Problems> The present invention solves the above problems by providing a surface layer having a flocking feeling with a two-pack type urethane ink on the surface of a base material, and a bottle on the back surface of the base material. The label with the adhesive that can adhere to the label is placed with the surface layer facing the mold for blow molding, and the label and bottle are integrated by blow molding under conditions where the mold temperature is 80 ° C or less. The present invention provides a method for producing a labeled bottle, characterized by:

<Operation> The present invention is configured as described above, and the label can be integrated at the same time when the bottle is molded, and a high-quality labeled bottle with a feeling of flocking can be obtained.

<Example> Hereinafter, an example of the present invention is described based on a drawing.

First, a base material (1) made of paper, a plastic film or the like as shown in FIG. 1 is provided with a surface layer (2) having a flocking feeling with a two-component urethane ink on one surface, and is molded on the other surface. An adhesive layer (3) having adhesiveness with the bottle is formed to prepare a label base material.

Two-component urethane ink is manufactured by Fujikura Kasei Co., Ltd.
It has heat resistance, abrasion resistance, solvent resistance, etc. like VELVEX.
Use one that has a feeling of flocking.

Next, as a method of molding the bottle (5) using this label (4), as shown in FIG.
Is inserted into the molding die (6), the surface layer (2) is set toward the molding die, the parison (7) is continuously extruded from the extruder, and this is cut into a certain length. , Blow and integrate the label on the outer surface of the molded bottle,
A labeled bottle (5) as shown is obtained. If the mold temperature is adjusted to 40 ° C. or lower when direct blow molding of polyethylene or the like and to 80 ° C. or lower when biaxially stretch blow molding polyester, collapse of the emboss during blow molding can be prevented.

When the blow-molded bottle is cooled and then released from the mold, a labeled bottle in which a label is integrated with the bottle is obtained. A pattern having a flocking feeling is formed on the surface of the label.

<Effects of the Invention> The present invention is a method for producing a labeled bottle that has the above-described configuration and that can provide a labeled bottle that can express a feeling of flocking and can be synchronized with a plastic bottle having a textured surface pattern.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a label used in the manufacturing method of the present invention, FIG. 2 is an explanatory view when manufacturing a labeled bottle of the present invention, and FIG. 3 is a label of the present invention bonded. It is a perspective view which shows an example of a bottle. (1) …… Base material (2) …… Surface layer (3) …… Adhesive layer (4) …… Label (5) …… Bottle

Claims (1)

[Claims] 1. A label having a surface layer having a flocking feeling of a two-component urethane ink on the surface of a base material, and an adhesive capable of adhering to a bottle on the back surface of the base material for blow molding the surface layer. A method for producing a labeled bottle, characterized in that the label and the bottle are integrated by arranging them toward a mold and performing blow molding under a condition that the mold temperature is 80 ° C. or lower.