JP2548670Y2 - Heat-sensitive composite display label - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a heat-sensitive composite display label, and in particular, prints on a label sheet and adheres to an adherend can be basically all performed by a heat treatment. And a heat-sensitive composite display label.

(Problems to be Solved by Conventional Techniques and Inventions) By making use of the fact that a peelable boundary surface is formed between thermoplastic resin layers when they are hot-pressed with each other, this is applied to the back surface of the label paper. A postcard with a composite label or a concealed seal using the same, which is provided with two thermoplastic resin layers having such a peelable boundary surface and leaves the transparent thermoplastic resin layer on the lower surface side on the adherend side. It has become increasingly popular in recent years.

However, these composite labels and the like require a treatment to give the label paper a concealment property with respect to the adherend surface, and the label paper naturally has a pressure-sensitive adhesive layer for the adherend and a separator for constantly protecting this. Is required, which complicates the label manufacturing process and increases material costs.

An object of the present invention is to provide a heat-sensitive composite display label whose manufacturing process and configuration are simple.

(Means for Solving the Problems) The problem of the prior art is that the film is made of a label paper provided with a heat-sensitive coloring layer which produces a hiding power by coloring on the upper surface and a transparent thermoplastic resin provided with a heat-sensitive adhesive layer on the lower surface. Wherein the label paper and the film are in a molten state and releasably adhered to each other by solidification of a thermoplastic resin layer present therebetween, and the color-forming temperature of the heat-sensitive color-forming layer on the upper surface of the label paper is the same as that of the film. This is achieved by a heat-sensitive composite display label characterized by being higher than the bonding temperature of the heat-sensitive adhesive layer on the lower surface.

(Function) The heat-sensitive composite display label of the present invention is prepared in advance by preparing a raw material of label paper having a heat-sensitive coloring layer on the upper surface and a film made of a transparent thermoplastic resin having a heat-sensitive adhesive layer on the lower surface. It is manufactured by supplying a thermoplastic resin in a molten state by, for example, hot extrusion or the like, pressing the resin, and cooling and solidifying it.

When the heat-sensitive adhesive layer on the lower surface side of the film made of a transparent thermoplastic resin is heated in a state where such a heat-sensitive composite display label is in close contact with the adherend, thermal adhesion between the heat-sensitive composite display label and the adherend is achieved. Occurs, and the label adheres to the adherend. Therefore, the heat-sensitive composite display label of the present invention does not require a pressure-sensitive adhesive layer or a separator for protecting the same, unlike the conventional tack label. Also, on the upper surface of the label paper, a hiding effect occurs due to printing on the thermosensitive coloring layer,
There is no need to provide special concealing means such as an aluminum thin film on the back surface of the label paper.

When peeling the label paper adhered to the adherend, the label paper side is easily peeled from the peelable boundary surface between the transparent thermoplastic resin film and the melt-solidified thermoplastic resin layer, The description of the surface of the attached body can be read through a film made of a transparent thermoplastic resin left by heat-sensitive bonding.

In the present invention, the film made of a transparent thermoplastic resin is preferably made of a material having a relatively high melting point such as polyethylene terephthalate, and the thermoplastic resin layer present between the label paper and the film is preferably made of a material having a relatively high melting point. Low polyethylene or the like is used.

Embodiments The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 1 is a sectional view of a heat-sensitive composite display label which is a basic embodiment of the present invention.

In the figure, a label paper 2 made of high-quality paper or the like having a thickness of about 100 μm 2
Is coated with a thermosensitive coloring layer 1, while the thickness is
The lower surface of a transparent polyethylene terephthalate (PET) film 4 of 25 μm is coated with a heat-sensitive adhesive layer 3. A polyethylene resin layer 5 as a thermoplastic resin melted at a temperature of about 300 ° C. is supplied between the lower surface of the label paper 2 and the upper surface of the PET film 4 by thermal extrusion. The PET film 4 and the PET film 4 are pressed against each other using a backside cooling roller, and are brought into close contact with each other by cooling and solidifying the molten resin layer 5.

On the lower surface of the label paper 2, an anchor coat layer 6 made of a resin having a higher compatibility with the molten polyethylene resin layer 5 than the PET film 4, for example, a polyethylene resin of the same kind as the resin layer 5, is formed in advance. Is preferred.

The coloring temperature of the thermosensitive coloring agent of the thermosensitive coloring layer coated on the upper surface of the label paper 2 was about 120 ° C., while the bonding temperature of the thermosensitive adhesive layer coated on the lower face of the PET film 4 was about
80 ° C is used.

When using such heat-sensitive composite label,
For example, a continuous paper (form or postcard sheet or the like) T on which information to be concealed is printed as an adherend and the heat-sensitive composite display label are attached to the heat-sensitive adhesive layer 3 on the lower surface of the heat-sensitive composite display label. While heating to about 80 ° C., the heat-sensitive adhesive layer 3 is set so as to face the information printing surface of the continuous paper, and is supplied to the bonding roller at a speed synchronized with each other. For the thermal bonding between the display label and the continuous paper, supply of hot air between them and hot pressing or any other method is used.

In a state where the paper has passed through the rollers, the label paper 2 is adhered to the continuous paper T by the heat-sensitive adhesive layer 3 as shown in FIG. Then, this paper is supplied to the color printing section to
After heating under pressure at a temperature of ° C. to form the heat-sensitive coloring layer 1 and performing heat-sensitive coloring printing, the continuous paper T is cut into sheet paper of an appropriate size.

This color printing has an effect of providing a hiding power, and therefore, characters, patterns, etc. may be printed over the entire surface, or solid printing may be performed only on a portion corresponding to the information printing surface of the adherend surface. Good.

In the paper (for example, a postcard) T in this state, the information P on the paper surface is covered with the label paper 2, and in particular, the information P on the paper surface is displayed in the heat-sensitive composite display due to the concealing action of the color printing area on the surface of the label paper 2. Nothing can be seen through the label.

When the heat-sensitive composite display label is peeled off from the paper T, the label paper 2 is peeled off from the peelable surface S between the lower surface of the melted and solidified polyethylene resin layer 5 and the upper surface of the PET film 4 to form a transparent PET film. Only 4 remains on the paper side, and the information P on its surface is read through the film 4.

The label paper 1 which has been peeled off from the paper has no tackiness as a characteristic of the peeling of the lead bonding surface between the thermoplastic resins, and can be stored as it is.

In the present invention, the heat-sensitive adhesive layer 1 is coated on the upper surface of the label paper 2. Instead, a pressure-coloring agent layer is coated, and the pressure-coloring printing is performed by a normal dot impact printer or the like. It is also possible to apply.

(Effects of the Invention) As described above, according to the present invention, a heat-sensitive composite display label can be manufactured with a very simple process and structure.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the heat-sensitive composite display label according to the present invention, and FIG. 2 is an explanatory view showing the embodiment. DESCRIPTION OF SYMBOLS 1 ... Thermal coloring layer, 2 ... Label paper, 3 ... Thermosensitive adhesive layer, 4 ... PET film, 5 ... Polyethylene resin layer, 6 ... Polyethylene anchor coat layer P ... Information S ... Peeling Possible surface T: adherend (continuous paper)

Claims (1)

(57) [Scope of request for utility model registration] The label comprises a label paper 2 provided with a heat-sensitive coloring layer 1 on its upper surface, which produces a hiding power by coloring, and a film 4 made of a transparent thermoplastic resin provided with a heat-sensitive adhesive layer 3 on its lower surface. The paper 2 and the film 4 are adhered so as to be peelable from each other by solidification of a thermoplastic resin layer 5 existing between them in a molten state, and the coloring temperature of the heat-sensitive coloring layer 1 on the upper surface of the label paper 2 is adjusted to the temperature of the film 4. A heat-sensitive composite display label, which is higher than the bonding temperature of the heat-sensitive adhesive layer 3 on the lower surface.