JP2003098968A - Label for in-mold forming, in-mold formed article and in-mold forming method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a label for in-mold forming which can prevents the occurrence of being creased and bent in inserting it into a female mold, can be inserted to a prescribed position, can enhance the production yield accordingly, can be taken one sheet by one sheet in a correct posture out of a label feeder, can be improved in handling quality by making rigidity higher without increasing its thickness and can be reduced in cost, and an in-mold formed article and in-mold forming method using the same. SOLUTION: The label 1 for in-mold forming to be fused to the surface of the molded article inserted into the female mold so as to come into contact with its molding surface and molded by the female mold and a male mold, is characterized in that it is provided with embosses 11 in at least portions of a label surface 10 in contact with the molding surface of the female mold, thereby, the contact area of the label surface 10 and the molding surface is decreased and the firm sticking of the label surface 10 to the molding surface during the course of insertion into the female mold is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-mold molding label, an in-mold molded product using the label, and an in-mold molding method.

[0002]

2. Description of the Related Art For example, a plastic container containing commercially available food or the like is usually provided with a label indicating its contents, PR items, manufacturer's name and the like. An in-mold molding method is known as a method of fusing such a label to a plastic container.

In this in-mold molding method, the label is wrapped around the inserter, the inserter is inserted into the female mold so that the label comes into contact with the molding surface of the female mold, and then the inserter is left with the label left in the female mold. Take out, insert the male mold into the female mold and adsorb the label to the male mold. Then, the molding material is usually injected into the molding space between the female mold and the male mold, and the adhesive layer of the label is melted by the heat of the molding material and fused to the molding material.

[0004]

However, since the label surface of the conventional in-mold molding label is entirely flat and the molding surface of the female mold is also substantially flat, the label is inserted into the female mold. There was a problem that the label adhered to the molding surface in the middle of the process, and if the label was pushed down as it was, the label wrinkled or the upper side of the label was broken and the label could not be inserted until the end. In this case, the product yield of in-mold molded products is low.

Further, a large number of in-mold molding labels are stacked on a label supply device, and the labels are adsorbed one by one by an adsorption means or the like and taken out and wound around a male die. The labels stick to each other, and when the upper label is taken out, the lower label may also be taken out together in a two-layered state, or the labels may be taken out in a misaligned posture.

Further, the conventional label for in-mold molding has a problem that the rigidity is low and the handleability is poor. The rigidity can be increased by increasing the thickness of the label, but this causes a problem of high material cost.

The object of the present invention is to solve such problems, and to prevent wrinkles and folds from occurring when the label is inserted into the female mold, and to prevent the label from having a predetermined position. The product yield can be increased, and the labels can be taken out one by one from the label supply device in the correct posture, and the rigidity can be increased without increasing the thickness and the handleability can be improved. It is a technical object to provide an in-mold molding label that can be manufactured, an in-mold molded article using the same, and an in-mold molding method.

[0008]

The present invention is an in-mold molding label, an in-mold molded article and an in-mold molding method using the same, which are configured as follows to solve the above-mentioned technical problems. ing. That is, the present invention is an in-mold molding label that is inserted into a female mold so as to be in contact with the molding surface thereof and is fused to the surface of a molded product molded by the female mold and the male mold. By providing embossing on at least a part of the label surface in contact, the contact area between the label surface and the molding surface is reduced, and the label surface is kept in close contact with the molding surface during insertion into the female mold. It is characterized by preventing.

Various shapes such as a circle, a square, a straight line, a curved line, and a lattice can be selected as the emboss, and the size and the depth can be set arbitrarily.

Further, the present invention is characterized in that, in an in-mold molded article in which an in-mold molding label is fused on the surface, the in-mold molding label is the above-mentioned in-mold molding label.

As this in-mold molded product, a cup-shaped container or the like can be exemplified, and its cross-section can be arbitrarily selected such as circular, elliptical, quadrangular or polygonal.

Further, according to the present invention, the in-mold molding label is inserted into the female mold so as to be in contact with the molding surface, and then a molding material is injected between the female mold and the male mold to obtain the in-mold molding. In the in-mold molding method of fusing a molding label to the surface of a molded article, the in-mold molding label is the above-mentioned in-mold molding label.

This in-mold forming method is performed by vacuum forming,
It can be applied to pressure molding, hollow molding, matched die molding, foam molding, injection molding, or the like.

According to the in-mold molding label, the in-mold molded article and the in-mold molding method using the same of the present invention, the surface of the label is a female mold while the in-mold molding label is being inserted into the female mold. Since it can prevent the label from sticking to the molding surface, it can be inserted with a light force, which can prevent wrinkles and folds from occurring on the label, and also insert the label into the female mold as far as it will go. Can be placed in

Therefore, it is possible to prevent the occurrence of defects during the in-mold molding, which can increase the product yield of the in-mold molded products.

Further, since it is possible to prevent the labels stacked in the label supply device from sticking to each other, the labels can be taken out one by one reliably and in a correct posture. Further, by providing the embossing, the rigidity can be increased without increasing the thickness of the label, and the rigidity can be maintained at the same level as the conventional one even if the thickness is reduced, so that the cost can be reduced.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an in-mold molding label, an in-mold molded article using the same, and an in-mold molding method according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an in-mold molding label 1 of the present invention. The label 1 for in-mold molding is, for example, fused to the surface of a cup-shaped in-mold molded product 26 (FIG. 8), and is formed into a substantially fan shape. Further, on the label surface 10 of the in-mold molding label 1, a large number of embosses (unevenness) 11, 11, ...
・ ・ Is provided.

This in-mold molding label 1 is shown in FIG.
As shown in, the polyethylene layer 12 and the adhesive layer 13 are laminated and formed. The embossed 11, 11, ...
Is provided on the label surface 10 on the polyethylene layer 12 side. The shape of the embossing 11 is, for example, circular, square,
Various shapes such as a linear shape, a curved shape, and a lattice shape can be used, and the height t thereof can be set appropriately.

Although FIG. 2 shows a two-layer in-mold molding label 1, the in-mold molding label is
It may have one layer or three or more layers.

Next, an in-mold molding method using the in-mold molding label 1 will be described. In this in-mold forming method, as shown in FIG. 3, a large number of in-mold forming labels 1, 1 are provided in the label supply device 15.
... are stacked and picked up one by one by the suction means 16. The in-mold forming labels 1, 1, ... Are stacked with the label surface 10 facing upward.

As shown in FIG. 4, the in-mold forming labels 1 taken out one by one from the label supplying device 15 have an outer periphery of an inserter 19 which is substantially similar to the cup-shaped in-mold formed product 26 (FIG. 8). Wrap around the surface. At this time, the label surface 10 on which the embosses 11, 11, ...

The inserter 19 is provided with a plurality of suction holes 21. By sucking the in-mold molding label 1, it is possible to prevent the label 1 from being displaced or dropped from a predetermined position.

Next, as shown in FIG.
Is inserted into the cavity 23 of the female die 22. At this time, as shown in FIG. 6, since the embossments 11, 11, ... Of the in-mold molding label 1 are in contact with the molding surface 24 of the female die 22, the label surface 10 and the molding surface 24 are different from the conventional ones.
The contact area with and decreases, and it becomes easy for air to enter between them.

Therefore, it is possible to prevent the in-mold molding label 1 from sticking to the molding surface 24 during the insertion of the in-mold molding label 1, so that the in-mold molding label 1 can be inserted with a light force. It is possible to prevent wrinkles and breaks from occurring in the in-mold molding label 1, and it is possible to insert the in-mold molding label 1 into the female mold 22 to the end and accurately dispose it at a predetermined position. In this way, after the in-old molding label 1 is inserted into the female mold 22, the inserter 19 is taken out with the insert molding label 1 left.

Next, as shown in FIG. 7, the male die 20 is inserted into the female die 22, and the molding material 25 is injected into the molding space formed by the female die 22 and the male die 20. As a result, as shown in FIG. 8, the cup-shaped in-mold molded product 26 is molded and the in-mold molded label 1 is formed.
The adhesive layer 13 of is melted by the heat of the molding material 25,
In-mold molding label 1 is in-mold molded product 26
Is fused in place on the surface of the.

As described above, according to the in-mold forming label 1 and the in-mold forming method using the same according to the present invention, the label surface 10 of the in-mold forming label 1 is described.
Since the embossing 11, 11, ... Is provided to reduce the contact area between the in-mold molding label 1 and the molding surface 24 of the female mold 22, the in-mold molding label 1 is inserted into the female mold 22. At this time, the in-mold molding label 1 can be prevented from coming into close contact with the molding surface 24 of the female mold 22.

As a result, the in-mold molding label 1
Since it will not be pushed down forcibly during insertion, it is possible to prevent the occurrence of defects such as wrinkles and folds, and insert the in-mold molding label 1 into the female mold 22 as far as it will go to a predetermined position. Since it can be arranged, the in-mold molding label 1 can be accurately fused to a predetermined position of the in-mold molded product 26. Therefore, the product yield of the in-mold molded product 26 can be increased.

Further, when a plurality of in-mold molding labels 1, 1 ... Are stacked, it is possible to prevent the labels from sticking to each other. Each can be taken out in the correct posture.

Further, by providing a large number of embosses 11, 11, ... On the label surface 10 of the in-mold molding label 1, the rigidity can be increased without increasing the wall thickness, thus improving the handleability. It is possible to prevent cost increase. Also, emboss 1
By providing No. 1, the wall thickness can be reduced and the same level of rigidity as the conventional one can be maintained, so that the cost can be reduced.

Further, by providing the in-mold molding label 1 with the embossing 11, when the in-mold molding label 1 is fused to the in-mold molded product 26, the reinforcing effect thereof is enhanced, so that the in-mold molding is improved. The thickness of the product 26 itself can be reduced, and the cost can be reduced.

Further, the in-mold molding label 1 has a matte, non-glossy appearance due to the embosses 11, 11, ... Also, the embossed 11, 11, ...
.. exhibits an anti-slip effect when the in-mold molded product 26 is gripped.

In the above embodiment, the embossing 11
Was provided over the entire surface of the in-mold molding label 1, but it may be provided only on a part thereof. Further, in the above-described embodiment, the case where the present invention is applied to the in-mold molded product 26 having a circular cross section is described. However, the present invention, as shown in FIG. It can be applied to the product 27 and in-mold molded products having various shapes such as a polygonal cross section and an elliptical cross section.

[0034]

As described above, according to the label for in-mold molding of the present invention, the in-mold molded article and the in-mold molding method using the same, the label surface of the in-mold molding label is embossed. Therefore, it is possible to prevent the in-mold molding label from sticking to the molding surface of the female mold, thereby preventing defects such as wrinkles and creases and accurately fusing the label to a predetermined position of the molded product. You can Therefore, it is possible to prevent the occurrence of defects during in-mold molding, which can increase the product yield of in-mold molded products.

Further, when a plurality of in-mold forming labels are piled up, it is possible to prevent the labels from sticking to each other, so that the in-mold forming labels can be taken out one by one from the label supply device in a correct posture. .

By providing the emboss, the rigidity can be increased without increasing the wall thickness.
The handleability can be improved, and the rigidity can be maintained to the same level as the conventional one even if the wall thickness is reduced, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an in-mold molding label according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram showing a label supply device according to the present invention.

FIG. 4 is a view showing a male mold according to the present invention.

FIG. 5 is a cross-sectional view illustrating an in-mold molding method according to the present invention.

FIG. 6 is a diagram illustrating an in-mold molding method according to the present invention.

FIG. 7 is a perspective view showing an in-mold molding method according to the present invention.

FIG. 8 is a perspective view showing an in-mold molded product according to the present invention.

FIG. 9 is a view showing another embodiment of the in-mold molded product according to the present invention.

[Explanation of symbols]

1 Labels for in-mold molding 10 Label surface 11 embossing 20 Male 22 Female 24 Molded surface 26,27 In-mold molded products

Continued front page    F term (reference) 3E095 AA06 BA01 CA10 FA12 FA13                 4F206 AD09 AD24 AD28 AH55 AH56                       JA07 JB19 JF05

Claims (3)

[Claims] 1. A label for in-mold molding which is inserted into a female mold so as to be in contact with the molding surface thereof and is fused to the surface of a molded product molded by the female mold and the male mold, wherein the molding of the female mold is performed. By providing an emboss on at least a part of the label surface in contact with the surface, the contact area between the label surface and the molding surface is reduced, and the label surface comes into close contact with the molding surface during insertion into the female mold. A label for in-mold molding, which is characterized by preventing 2. An in-mold molded article having an in-mold molding label fused to a surface thereof, wherein the in-mold molding label is the in-mold molding label according to claim 1. -Molded products using labels for labels. 3. The in-mold molding label is obtained by inserting the in-mold molding label into contact with the molding surface in the female mold, and then injecting a molding material between the female mold and the male mold. In-mold molding method for fusion bonding to the surface of a molded article, wherein the in-mold molding label is the in-mold molding label according to claim 1. Method.