JPH0625871U - Thermal label - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a heat-sensitive label that can be manufactured at low cost, even in thin-walled heat-sensitive labels, without causing thermal deformation such as softening deformation and dimensional change due to heat when activating the adhesive. To do. [Structure] Film body 1 on one side, heat-sensitive adhesive layer on the other side
In the heat-sensitive label 2, the heat-shielding layer 3 is sandwiched between the film body 1 and the heat-sensitive adhesive layer 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a thin-walled heat-sensitive label attached to an adherend such as a package.

[0002]

[Prior art]

 The heat-sensitive label has a film body on the front side and a heat-sensitive adhesive layer on the back side, and a plastic material or a synthetic paper material is used as the material of the film body.

When the heat-sensitive label is attached to a package or the like, the adhesive in the heat-sensitive adhesive layer has to be activated, but the heating at that time causes the film body to undergo softening deformation and dimensional change. In order to prevent this, it is necessary to use, for example, a biaxially stretched polyester film having a heat resistance and a thickness of 50 μm or more as the main body of the film in order to prevent it.

[0004]

[Problems to be solved by the device]

 However, the above-mentioned thick-walled heat-sensitive label was naturally expensive, and the cost could not be reduced.

The present invention has been made in view of the above conventional problems. Even in a heat-sensitive label using a thin material having low heat resistance, soft deformation due to heat when activating the adhesive, and size It is an object to provide a heat-sensitive label that can be manufactured at low cost without causing thermal deformation such as change.

[0006]

[Means for Solving the Problems]

 The present invention takes the following technical means in order to solve the above problems.

That is, in a heat-sensitive label having a film body 1 on one side and a heat-sensitive adhesive layer 2 on the other side, a heat-shielding layer 3 is sandwiched between the film body 1 and the heat-sensitive adhesive layer 2. It is characterized by.

[0008]

[Action]

 In activating the adhesive when applying the heat-sensitive label to the package, etc., the heat-sensitive label of the present invention has the heat-shielding layer 3 sandwiched between the film body 1 and the heat-sensitive adhesive layer 2. The heat blocking layer 3 blocks heat rays from the outside and blocks heating of the film body 1.

Therefore, the film body 1 does not undergo thermal deformation such as softening deformation and dimensional change due to heat when the adhesive is activated. Further, since the heat ray reflected by the heat blocking layer 3 is also absorbed by the heat sensitive adhesive layer 2, the activation of the adhesive in the heat sensitive adhesive layer 2 is promoted and the activation time can be shortened.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the heat-sensitive label of the present invention has a film body 1 made of polyethylene terephthalate (PET) film or oriented polypropylene (OPP) film and having a thickness of 12 to 50 μm, as shown in FIG. A heat-sensitive label that is activated by heating the other side and has a stickiness that lasts for a certain period of time and has a thickness of 5 to 20 μm, which is between the film body 1 and the heat-sensitive adhesive layer 2. A metal such as silver or aluminum is attached to the inner surface of the film body 1 by vacuum deposition, thermal transfer, sputtering, etc., and a heat-shielding layer 3 having a metallic luster and having a thickness of 300 to 1000 Å is sandwiched. There is.

On the surface of the film body 1, there is provided a print display portion 4 on which a trademark, a character pattern and the like are printed, and the surface is further subjected to a coating treatment 5 with a transparent resin.

When the heat-sensitive label having the above-mentioned structure is attached to a package or the like, it is necessary to activate the heat-sensitive adhesive layer 2. At this time, the surface of the heat-sensitive adhesive layer 2 is externally attached. It is activated by radiating heat rays such as far infrared rays from it and heating it.

At this time, the heat blocking layer 3 has an action of blocking by reflecting heat rays from the outside, and heating of the film body 1 side is blocked, so that the film body 1 is softened and deformed. This does not cause thermal deformation such as change, so that the printed display portion 4 formed on the surface of the film body 1 is not distorted or contracted.

Further, as described above, by providing the heat-shielding layer 3, the influence on the film body 1 is eliminated, so that even if the film body 1 has a considerably thin wall, there is no problem. , An ultra-thin product with a thickness of about 12 to 25μ can be used, and material costs can be saved.

Further, heat rays are reflected by the heat-shielding layer 3, and the reflected heat rays are also absorbed by the heat-sensitive adhesive layer 2, so that activation of the adhesive in the heat-sensitive adhesive layer 2 is promoted. The activation time can be shortened.

Further, the heat blocking layer 3 is not limited to the attachment of the metal, and may be a layer such as an aluminum foil having a metallic luster. Since all of them are opaque, air bubbles in the adhesive surface of the heat-sensitive adhesive layer 2 do not stand out easily when a heat-sensitive label made of PET film or the like is attached to a package or the like.

As the adhesive used for the heat-sensitive adhesive layer 2, there are a delayed tack adhesive and a hot melt adhesive, and in particular, the delayed tack adhesive is adhered to the adhesive surface after coating and drying at room temperature. Although it has no property, the crystalline solid plasticizer softens the polymer by heating to generate adhesive force, and the adhesive force can be maintained for a certain period of time for several hours to several days even after cooling. Therefore, a strong adhesive force can be obtained, and at the same time, the fitting property to an adherend such as a package can be excellent.

Therefore, when attaching the heat-sensitive label of the present invention to an adherend such as a package, it is sufficient to activate the heat-sensitive adhesive layer 2 of the heat-sensitive label with heat, and until activation. Since it is not tacky, release paper is unnecessary.

The activation temperature of the heat-sensitive adhesive is preferably 60 ° C to 120 ° C.

[0021]

[Effect of device]

 Since the heat-sensitive label of the present invention has a heat-shielding layer sandwiched between the film body and the heat-sensitive adhesive layer, it can be used for activating the adhesive when the heat-sensitive label is attached to a package or the like. In addition, the heat shield layer shields the heat rays from the outside by shielding the heat rays from the outside, thereby preventing the film body from being heated.

Therefore, the film body does not undergo thermal deformation such as softening deformation and dimensional change due to heat when the adhesive is activated. In addition, since the heat reflected by the heat-sensitive adhesive layer is absorbed by the heat-sensitive adhesive layer, activation of the adhesive in the heat-sensitive adhesive layer is promoted and the activation time can be shortened.

Further, since the film body is not deformed by heat as described above, even if the film body is very thin, it can be sufficiently coped with, so that it can be manufactured at low cost and a large cost reduction can be achieved. it can.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 film body 2 heat-sensitive adhesive layer 3 heat-blocking layer

Claims (1)

[Scope of utility model registration request] 1. A heat-sensitive label having a film body (1) on one side and a heat-sensitive adhesive layer (2) on the other side, wherein a heat-shielding layer (1) is provided between the film body (1) and the heat-sensitive adhesive layer (2). 3) A heat-sensitive label characterized by being sandwiched.