JPH05945Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is applicable to glass bottles, plastic bottles, etc.
This invention relates to improvements in cylindrical labels that are collected after use and attached to containers and the like for reuse.

[Conventional technology]

Tubular labels are widely used as product display labels attached to packaging containers for beverages and other products.

Tubular labels are made by winding a film such as heat-shrinkable plastic film or self-stretching plastic film (stretch film) to the desired diameter, overlapping the edges on both sides as a bonding margin, and then It is manufactured by adhering with an adhesive or by heat-sealing using the film's own heat-sealing properties.

A cylindrical label using a heat-shrinkable film is fastened to the container surface using the heat shrinkage force of the film generated by heat treatment as a tightening force, and a cylindrical label using a stretch film uses the shrinkage force caused by its elastic expansion and contraction deformation. acts as a clamping force and is clamped to the container surface.

Many of the glass bottles, plastic bottles, etc. used as packaging containers for beverages and other products are collected and reused after use. When reusing a container, it is necessary to clean and disinfect the container each time, as well as to remove the label on the container surface and replace it with a new label.

The cylindrical label attached to the surface of the container can be cut along its entire length in the longitudinal direction of the container.
Since the label loses its attachment to the container surface, it can be separated from the container surface as it is. Conventional methods for cutting the label include using a knife, or directing a jet of hot air or heated steam at the cylindrical label. Spray at a constant angle of inclination,
A method of cutting in the longitudinal direction of the body by the action of injection pressure (Japanese Patent Publication No. 60-42115, etc.) is used.

[The problem that the idea attempts to solve]

However, with the method of cutting cylindrical labels using a knife, if the container is a plastic bottle, it is extremely difficult to reliably cut only the label without damaging the container. This can cause scratches on the resin coating film and shorten the bottle's service life. On the other hand, methods using hot air jets or heated steam jets are effective for cutting labels on glass bottles, but in the case of plastic bottles, the jet pressure causes the bottle to bend, so it is difficult to cut cylindrical labels. However, it is not possible to apply the injection pressure necessary for cutting, and depending on the material of the bottle, the bottle itself may undergo thermal deformation or deterioration, making it impossible to reuse it.

This invention aims to maintain stable attachment of cylindrical labels attached to reused containers such as glass bottles and plastic bottles during the market distribution process, while preventing damage to the containers during the container recycling process after collection. To provide a cylindrical label that can be efficiently removed from a container surface in a short time without causing any damage.

[Means to solve the problem]

In the present invention, in a cylindrical label that is fastened to the surface of a container, a tape soluble in hot water or an alkaline aqueous solution is attached to the film surface so that the edges on both sides of the film are bonded to each other. It is characterized by being connected to form a cylindrical shape.

[Effect]

The cylindrical label of the present invention is formed into a cylindrical shape by connecting the edges of both sides of the film with tape that is soluble in hot water or alkaline aqueous solution. In the label removal process performed after collection, the tape is dissolved with hot water or alkaline aqueous solution to eliminate the connection between the edges of the film, resulting in a cylindrical label.
Since it has a cylindrical shape, it is released from the previously maintained engagement with the container surface and detached from the container surface.

In addition, during the distribution process or the normal use of the product, the surface of the container is not left in contact with hot water or alkaline aqueous solution, so during the distribution process or during the use of the product, This avoids the inconvenience of the tape melting and the resulting peeling and falling off of the label, making it possible to maintain a stable attachment state. In particular, in the case of cylindrical labels that use tapes that are soluble in heated aqueous alkaline solutions, unless the two conditions of heating and alkaline conditions are combined, the label will not peel or fall off, and this will limit product distribution. This is preferable in that the stability of the label attachment state during the process and use can be improved.

FIG. 1 shows the cylindrical label of the present invention and an example in which it is attached to the surface of a container such as a bottle. 1 is a cylindrical label, and 3 is a tape soluble in hot water or alkaline aqueous solution (hereinafter referred to as "soluble tape"). The soluble tape 3 is attached to the left and right edges 2 of the label film 2.
They are bonded to the surfaces of a and 2b with adhesives 4, 4. The label film 2 has left and right edges 2a
and 2b and are connected by a soluble tape 3 adhered to the surface thereof to form a cylindrical label 1, which is attached to the body surface 10a of the container 10. When the soluble tape 3 of the cylindrical label 1 is dissolved, the left and right edges 2a and 2b of the label film 2 lose their mutual connection and are no longer engaged with the container 10, as shown in FIG. ,
It leaves the surface of the container as it is.

In the cylindrical label of the present invention, the soluble tape 3
As mentioned above, the material used is one that is soluble in hot water or one that is soluble in an alkaline aqueous solution heated at room temperature or heated.

For example, a polyvinyl alcohol resin film that is soluble only in hot water can be used as the tape that is soluble in hot water. Examples include "Film" [manufactured by Aicello Chemical Co., Ltd.] and "Boblon" [manufactured by Nippon Gosei Kagaku Kogyo Co., Ltd.].

In addition, as a tape soluble in hot water, the temperature is approximately 50℃.
By selecting a material that melts at temperatures above ℃, labels will not peel or fall off, even if the product is placed in an environment where it comes into contact with hot water (usually below 45℃), such as in the kitchen or bathroom. It can be used without any damage. However, if the heat resistance is too high,
While this makes it more reliable to prevent labels from falling off during use, a higher temperature processing solution is required to remove the labels (dissolve the tape) in the recycling process of the collection containers, making it difficult for containers such as plastic bottles. The material of the hot water soluble tape may cause deformation or deterioration of the container itself depending on the material, so the material of the hot water soluble tape should be selected appropriately depending on the usage of the target product and the material of the container. . When the container is a plastic bottle, a tape soluble in hot water of 50 to 70°C is used, for example.

As the tape soluble in an alkaline aqueous solution at room temperature, a tape in which an aqueous alkali-soluble coating is applied to the surface of a film soluble in room temperature water (for example, a water-soluble polyvinyl alcohol resin film) can be used. Specific examples include "Kuraray Vinylon Film" [manufactured by Kuraray Co., Ltd.],
"Hydrick GT Medium", "WGK
Examples include tapes coated with "Medium" (both manufactured by Dainichiseika Kagyo Co., Ltd.).

In addition, as a tape soluble in a heated alkaline aqueous solution, the film (soluble in room temperature water) of the above tape soluble in a room temperature aqueous alkaline solution is used.
Films soluble in hot water (“K. Kuraray Vinylon Film”, “Icerovinylon Film” mentioned above,
"Boblon" etc.), the above-mentioned alkali-soluble water-based coating can be used instead.

3 to 5 show examples of how the edges of the film are connected to each other by means of a soluble tape. Third
The figure shows end surfaces 2a' and 2b' of the left and right edges 2a and 2b of the film 2 butted against each other, and a soluble tape 3 is applied to the surface of the film 2 by straddling the edges 2a and 2b.
In Fig. 4, the edges 2a and 2b of the film 2 are stacked vertically, and the soluble tape 3 is bonded thereon to connect the left and right edges. In the figure, the left and right edges 2a and 2b of the film 2 are placed facing each other at an appropriate distance, and a soluble tape 3 is bonded across both edges 2a, 2b to establish a connection between the left and right edges. is forming.

The above-mentioned soluble tape 3 can be bonded to the film 2 using various adhesives, such as pressure-sensitive adhesives, heat-sensitive adhesives, or dry lamination, in the same way as bonding the edges of the films together when producing conventional cylindrical labels. Just use adhesive etc. as appropriate.
In addition, if the film 2 and tape 3 are of a material that can be heat-sealed, the interface between the tape 3 and the film 2 may be heat-sealed (however, as shown in FIG. 4, the edges of the film 2
When a and 2b are stacked one on top of the other, the film and the tape may be adhered to each other by making sure that no heat fusion occurs at the interface between the edges.

The cylindrical label of the present invention has a cylindrical shape in which the left and right edges of the label film are connected with a soluble tape. It's not really different from what's on the label. That is, the label film 2 is
A heat-shrinkable film, a stretch film, etc. can be used arbitrarily, and the cylindrical label 1 using the heat-shrinkable film as the label film 2 is made to have a diameter slightly larger than that of the target container, and then
As shown by the chain line in the figure, it is fitted onto the container 10 and heat-shrinked by applying heat treatment such as blowing hot air, so that it can be attached tightly to the body surface 10a of the container as shown in the figure. In addition, the heat-shrinkable film 2 is wound around the surface of the container 10, and the left and right edges 2 are
The soluble tape 3 may be adhered to a and 2b (connecting the left and right edges) to form a cylindrical shape, and then heat treated to make it adhere to the surface of the container. When a stretch film is used as the label film 2, the cylindrical label 1 is manufactured to have a slightly smaller diameter than the container, is elastically expanded and fitted onto the container, and its elastic contraction force brings it into close contact with the container surface. It will be installed.

The process for removing the cylindrical label of the present invention from the container used is hot water, room temperature alkaline aqueous solution, or heated alkaline solution, depending on the material of the soluble tape of the cylindrical label. This is carried out by using an aqueous solution as a treatment liquid and carrying out showering or immersion treatment. The processing liquid may be a caustic soda aqueous solution, hot water, etc., which are used for alkaline cleaning and disinfection in the recycling process of collection containers, and the label removal process can be performed in conjunction with these cleaning and disinfection processes. You can also do it.

[Effect of idea]

The cylindrical label of the present invention does not easily peel off or fall off from the container surface during the distribution process of the product attached to the container surface, and maintains a stable attachment state. Unlike conventional cylindrical labels, a simple processing operation using hot water or alkaline aqueous solution as the processing liquid eliminates the need for complicated equipment and eliminates inconveniences such as damage and deformation of containers, allowing for the processing of large quantities of containers. Label removal can be performed efficiently.

Note that the containers to which the cylindrical label of the present invention is attached are not limited to those that are reused as they are after being subjected to cleaning, disinfection, etc. after use. For plastic containers that are crushed after use and used as raw materials for new containers, if the containers and labels are made of different materials (which is often the case), it is necessary to separate and collect the containers and labels. The cylindrical label of the present invention can be effectively used as a countermeasure in such cases.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of the cylindrical label of the present invention and how it is attached to a container, and Fig. 2 is a perspective view showing a state in which both edges of the film of the cylindrical label attached to the surface of the container are separated. 3 to 5 are perspective views showing examples of how the edges of the film of a cylindrical label are connected by a soluble tape. 1...Tubular label, 2...Label film, 2
a, 2b... Edge of film, 3... Soluble tape, 4... Adhesive.

Claims (1)

[Claims for Utility Model Registration] 1. In a cylindrical label that is fastened to the surface of a container, the edges on both sides of the film are immersed in hot water or an aqueous alkaline solution that is bonded to the surface of the film, spanning both sides. A cylindrical label characterized by being connected through a soluble tape to form a cylindrical shape. 2. The cylindrical label according to item 1 above, wherein the tape is soluble in a heated alkaline aqueous solution.