JPS63212979A - Label and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] One aspect of the present invention is
The present invention relates to a label made of a heat-shrinkable plastic film that is applied to a container for various beverages or foods and then heat-shrinked to adhere to the container, and a method for manufacturing the same.

[Prior Art] Conventionally, this type of label has been made of a single layer of a foamed plastic film or a non-foamed plastic film.

Labels made of a single layer of foamed plastic film have insulation properties and
It is widely used because it has excellent heat retention and cushioning properties, as well as excellent hiding power.

On the other hand, there are two types of labels made of a single layer of non-foamed plastic film, using transparent or translucent plastic film, and both of these labels have excellent surface smoothness and are comfortable to the touch. At the same time, the printed surface has a good gloss and a beautiful printing finish, and since the film is thin, the bulge that overlaps the overlapped area is thin, so it does not get caught when the coated container is transferred by an automatic machine. It has the advantage of being less likely to cause problems such as falling over.
Furthermore, since labels made of transparent non-foamed plastic film can be printed on the back side, ink transfer will not occur even if the printed labels are heated while in contact with each other, and the printed surface will not be scratched. On the other hand, labels made of translucent non-foamed plastic film are widely used because of their excellent hiding power and the ability to maintain the beauty of the printed surface even after the cylinder is filled with contents. There is.

[Problems to be Solved by the Invention] However, the above-mentioned labels made of a single layer of foamed plastic film have a poor surface smoothness, which makes them feel soft to the touch, and the printed surface has a poor gloss, resulting in a poor finish. Disadvantages are that it tends to get dirty, and since it is opaque, it is not possible to print on the back, so the printed surface is easily scratched, and that ink transfer is likely to occur when printed labels are heated while in contact with each other. was there.

On the other hand, labels made of a single layer of non-foamed plastic film mentioned above have the disadvantage of being thin and have poor heat insulation, heat retention, and cushioning properties, and in the case of transparent films, they have poor hiding power and cannot be used. It is difficult to maintain the beauty of the printed surface after the body is filled with the contents, and on the other hand, in the case of translucent film, printing on the back side is not possible, so the printed surface is easily scratched and printed. The disadvantage that ink transfer easily occurs when two labels are heated while they are in contact with each other has been eliminated.

The present invention was devised in view of the above circumstances, and its purpose is to provide excellent heat insulation, heat retention, and cushioning properties, to provide a good finish on the printed surface, and to maintain the beauty of the printed surface. To provide a label that has a good texture, does not cause scratches on a printed surface, and does not cause ink transfer, and a method for producing the same.

[Means for Solving the Problems] Hereinafter, the configuration of the present invention for achieving the above object will be described with reference to drawings corresponding to embodiments.

That is, in the label (1) of the first aspect of the present invention, the heat-shrinkable plastic has a foamed plastic film (2) on the inside and a non-foamed plastic film (3) on the outside.
), and the two layers of polymerized plastic film (4) are bent at both sides in the longitudinal direction so that their respective side edges overlap to form an overlapping part (5). ) are formed, and the overlapping portions (5) are overlapped to form a bag band shape with both longitudinal ends open.

Further, a second invention of the present invention is an invention of a method for manufacturing the label according to the first invention, which includes a feeding step in which two consecutive layers of polymerized plastic film (4a) are first formed. It is done.

That is, the original fabrics (2b, 3b) of heat-shrinkable foamed plastic film (2) and heat-shrinkable non-foamed plastic film (3) are arranged in two stages, with the foamed plastic film (2b) on the inside and the foamed plastic film (2b) on the outside. Forming two layers consisting of the non-foamed plastic film (3b), and
The plastic film (4a) of the layer is simultaneously fed while being polymerized in the longitudinal direction.

After that, an overlapping step is performed to form the overlapping portion (5). That is, both sides (4b, 4b) of the two-layer plastic film (4a) that is being fed while being polymerized.
The superimposed portion (5) is formed while superimposing the two.

Next, the two layers of polymerized plastic film (4a
) are overlapped simultaneously along the longitudinal direction to produce a bag-like continuous label (1a ) is performed.

The bag strip-shaped continuous label obtained in this way (1a
) is cut to a regular length according to the length of the container (7) to be applied to form individual labels (1). The label (1) is loosely inserted into each container (7) and heated, so that the label (1) is heat-shrinked and tightly adhered to the outer periphery of the container (7).

[Function] According to the label constructed as described above, the outside is made of a non-foamed plastic film with excellent surface smoothness, so it feels good on the skin and can be printed on the back. , you can get a beautiful finish with a good gloss on the printed surface, the printed surface is protected so it won't get scratched, and even if the printed labels are in contact with each other and heated, the ink will be removed. Not transcribed.

In addition, since the inside is made of foamed plastic film, it has excellent insulation, heat retention, and cushioning properties, and it also has excellent concealment properties, so the printed surface remains beautiful even after the cylinder is filled with contents. remain as is.

[Example] Hereinafter, the present invention will be explained in more detail with reference to an example shown in the drawings.

FIG. 1 is a perspective view showing an embodiment of the label according to the present invention, and FIG. 2 is a partially enlarged cross-sectional view taken along line I-I in FIG. FIG.

A bag strip-shaped label 1 with both ends open is made of two layers: an opaque heat-shrinkable foamed plastic film 2 on the inside and a thin transparent heat-shrinkable non-foamed plastic film 3 on the outside, which is wider than the foamed plastic film 2. The label 1 is made of a polymerized plastic film 4, and an overlapping portion 5 is formed continuously in the longitudinal direction on the surface of the label 1. At this time, appropriate printing is applied to the back surface of the non-foamed plastic film 3 in advance.

The superimposed part 5 is a joint part 6 formed in the non-foamed plastic film 3 in the outermost shell, and the side edge part 2a of the superimposed part 5 of the foamed plastic film 2 superimposed on the lower side thereof. In other words, from the state where the tip of the joint portion 6 of the non-foamed plastic film 3 comes into contact with the surface of the other bent end, the entire area of the overlapping portion 5 is formed while gradually increasing in height. The parts are continuously heat-welded or bonded.

The width of the joint portion 6, the width of the overlapping portion 5, the position, etc. are configured as appropriate.

Note that the overlapping portion 5 may be overlapped with an adhesive instead of heat welding, and printing on the film surface may be performed on the surface of the foamed plastic film 2 depending on the case.

A label having the above configuration is created, for example, through the following steps.

That is, as shown in FIG. 5, first, the heat-shrinkable foamed plastic film 2 and the foamed plastic film 2 are
Wider and thinner heat-shrinkable non-foamed plastic film 3
The respective original fabrics (2b, 3b) are arranged in two stages to form two layers consisting of the foamed plastic film 2b on the inside and the non-foamed plastic film 3b on the outside, and the side edges of the non-foamed plastic film 3b are formed. 3a and 3m are side edges 2a of the foamed plastic film 2b.

Two layers of plastic films 4a are fed simultaneously while being polymerized in the longitudinal direction so as to extend laterally from 2a, thereby forming two continuous layers of polymerized plastic films 4a.

Thereafter, the non-foamed plastic film 3b is polymerized and fed so that the side edge 3a of the non-foamed plastic film 3b is disposed on the outermost shell to form a joint 6. Both sides 4b, 4 of the plastic film 4a of the layer
b are overlapped by a folding machine constituted by a guide plate 8, a folding roller 9, a pull-out roller 10, etc., to form an overlapping portion 5. Therefore, by this second step, the overlapping part 5 from which the joint part 6 of the non-foamed plastic film 3b protrudes laterally is formed.

Next, a heat welding processing machine 1 such as an ultrasonic processing machine is applied over the entire area of the overlapped part 5 having the width shown in FIG. 2, including the joint part 6.
1, the overlapping portion 5 is continuously heated and welded along the longitudinal direction while being fed.

Therefore, in this third step, a bag-shaped continuous label 1a made of two layers of plastic film 4a with both ends open in the longitudinal direction is formed, and the label 1
a is wound onto the bobbin 12. The bag strip-shaped continuous label 1a wound up in this manner is cut into a regular length according to the length of the container 7 to be attached, as shown in FIG. 1, to form individual labels 1. .

The individual labels 1 obtained as described above are shaped into a substantially cylindrical shape as shown in FIG. 3, and then loosely inserted into a desired container 7. It is placed in a heating equipment and heated to shrink, so that it is tightly adhered to the container 7 as shown in FIG.

Furthermore, as described above, the overlapping portion 5 may be attached by adhesion instead of heat welding, and this can be changed manually. Furthermore, the label 1 of the present invention is attached to the container 7.
When heat-shrinking and attaching the inner foamed plastic film 2 to the outer non-foamed plastic film 3, the inner foamed plastic film 2 has a higher heat shrinkage rate at a predetermined temperature than the outer non-foamed plastic film 3, or a plastic material that shrinks at a low temperature is used. It is desirable to select

FIG. 6 shows an overlapping part 51 of a label according to another embodiment, in which the non-foamed plastic film 3 on the front side is longer than the same foamed plastic film 2;
Further, the non-foamed plastic film 3 on the back side is formed shorter than the same foamed plastic film 2, and the non-foamed plastic films 3.3 on the front and back sides and the same foamed plastic films 2.2 are welded or adhered to each other. .

According to the label of the above example, the thin joint of the outermost non-foamed plastic film covers the side edge of the lower thick foamed plastic film that is polymerized with a gentle slope, and the overlapping part is Since the labels are stacked, there are no snags, and therefore, when a container with a label attached thereto is fed by an automatic machine, troubles such as getting caught and falling over are less likely to occur.

[Effects of the Invention] As explained above, the present invention has a non-foamed plastic film on the outside, which makes it feel good on the skin, and since printing can be done on the back side, the printed surface has a glossy and beautiful finish. In addition to protecting the printing surface, there will be no scratches, and the ink on the printing surface will remain intact even when the printed labels are heat-shrinked in contact with each other. will not be transferred and stain other labels.

In addition, since the foamed plastic film is polymerized on the inside, it has excellent heat insulation, heat retention, and cushioning properties, and it also has excellent hiding properties, so the printed surface will change depending on the color tone of the contents filled in the container. Beauty is never lost.

In addition, its structure is simple, and it can be applied to containers in the same way as single-layer labels; on the other hand, it has the same effect as applying two single-layer labels. It is suitable for mass production because it can be obtained and its manufacturing method is easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the label according to the present invention, and FIG. 2 is a cross section taken along line 1-I in FIG. A cross-sectional view, FIG. 3 is a perspective view showing the label just before it is attached to the upper cylinder, and FIG. 4 is a state in which the label is heat-shrinked and affixed to the cylinder after being applied to the upper cylinder. FIG. 5 is a front view showing a part of the process of manufacturing a label according to the present invention, and FIG. 6 is a partially enlarged cross-sectional view showing a state of overlapping in the overlapping portion of labels according to another embodiment. It is. 1-label, la one consecutive label, 2(2b)-・
Heat-shrinkable foamed plastic film (original film), 3 (3b
)-・Heat-shrinkable non-foamed plastic film, 4 (4a
) - two layers of polymeric plastic film (continuous), 5
- Overlapping part, 6 - Joint part, 7 - Container, 8 - Guide plate, 9 - Folding roller, 10 - Pulling roller, 11 - Heat welding processing machine, 12 - Bobbin. Patent applicant: Bomback Co., Ltd. Agent/patent attorney: Satoshi Nishimura Tip rod figure 1
Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) In a cylindrical label made of a heat-shrinkable plastic film that is applied to the outer periphery of a container and then heat-shrinked to adhere to the outer periphery of the container, the side that should be in contact with the surface of the container to which it is applied. It consists of two layers of polymerized plastic film, an inner side of which is a heat-shrinkable foamed plastic film, and an outer side of which is a heat-shrinkable non-foamed plastic film that is thinner than the foamed plastic film, and the two layers of polymerized plastic films are on both sides. A label characterized in that edges are overlapped to form an overlapping part, and the overlapping part is overlapped to form a cylindrical shape. (2) Each raw material of a heat-shrinkable foamed plastic film and a heat-shrinkable non-foamed plastic film thinner than the foamed plastic film is made into two continuous layers, each consisting of the foamed plastic film on the inside and the non-foamed plastic film on the outside. a feeding step of simultaneously feeding the two layers of plastic films while polymerizing them in the longitudinal direction; a superimposing step in which the two layers of plastic film are fed while being bent inward and overlapped on both sides to form an overlapping part; and the overlapping part of the two layers of plastic film is continuously joined along the longitudinal direction. A method for producing a label, comprising: a joining step of forming a bag-like continuous label made of two layers of the plastic film with both longitudinal ends open.