JP3174015B2 - Thermocompression-bonded film with backing sheet and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermocompression-bonded film with a backing sheet and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a confidential postcard in which confidential contents are described, a normal postcard two sheets of large paper is folded in two, or a postcard three sheets of large paper is folded in three and adhered removably. The adhesive surface is used as a confidential surface. The recipient of the confidential postcard can peel off the confidential surfaces adhered removably from each other and read the confidential contents described therein.

[0003] In such a confidential postcard, as a method of releasably adhering the confidential surfaces to each other, a method of using a thermocompression bonding film composed of two transparent films whose inner surfaces are removably adhered to each other in advance. There is. Both outer surfaces of the thermocompression bonding film are coated with an adhesive which is heated to a predetermined temperature and welded to a contact object, and between the confidential surfaces which come into contact with each other when the paper is folded. When the sheet is heated while pressing the sheet in this state, both outer surfaces of the thermocompression bonding film are completely bonded to both confidential surfaces.

[0004]

The two releasably bonded films of the thermocompression bonding film described above are designed so that the total weight of the postcard conforms to the "standard postcard" standard stipulated in the Postal Law, for example. A thin transparent film made of a resin such as polyester and having a thickness of about several tens of μm is used. In this way, the thermocompression bonding film is thin and easily charged with static electricity.
For example, it is difficult to process to the size of a postcard or letter,
There was room for improvement in the handleability of the thermocompression bonding film.

Further, as described above, since a heat-welding adhesive is applied to both outer surfaces of the thermocompression-bonded film, if a large number of thermocompression-bonded films are left standing one upon another, depending on the temperature and pressure, Even in a natural state, the film and the film which overlap each other are welded to each other, which may make it difficult to use the film as a thermocompression bonding film.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a thermocompression-bonded film with a backing sheet excellent in handleability and a method for manufacturing the same.

[0007]

A thermocompression-bonding film with a backing sheet according to the present invention comprises two transparent films whose inner surfaces are releasably adhered to each other and whose respective outer surfaces are coated with a heat-welding adhesive. And the mount is removably adhered to the outer surface of at least one of the transparent films. The thermocompression-bonding film may have a planar rectangular shape, and the mount may be removably adhered to the outer surface of one of the transparent films along one side of the rectangle.

Further, the method of manufacturing a thermocompression-bonded film with a backing according to the present invention is characterized in that the inner surface is removably adhered to each other and the outer surface is coated with a heat-welding adhesive. A re-peelable adhesive is applied to one outer surface of the thermocompression bonding film or one surface of the backing sheet, and the thermocompression bonding film and the backing sheet are overlapped with each other on the side where the releasable bonding agent is applied. This is a method in which pressure is applied between the film and the thermocompression-bonding film so that they are removably adhered. The thermocompression-bonded film and the backing sheet each wound into a roll are rewound, and a re-peelable adhesive is applied to one outer surface of the thermocompression-bonding film or one side of the backing sheet,
The thermocompression-bonded film and the backing sheet are overlapped with the surface coated with the removable adhesive applied thereto, and pressure is applied to the backing sheet and the thermocompression-bonding film with a pressing roller, so that the backing sheet and the thermocompression bonding film are releasably bonded. Can be cut into sheets of a predetermined size.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a thermocompression-bonding film with a backing according to an embodiment of the present invention. The thermocompression bonding film 1 has two transparent films 3 and 4 whose inner surfaces are bonded to each other via a removable pseudo adhesive layer 2. The outer surfaces of these transparent films 3 and 4 are coated with heat-welding adhesives 5 and 6, respectively, which are heated to a predetermined temperature and welded to a contact object.

[0010] The thermocompression-bonding film 1 is adhered on the surface of the backing paper 8 by a releasable adhesive 7. The thermocompression-bonding film 1 is not adhered to the mount 8 on its entire surface, but linearly extends along the long side 1a of the thermocompression-bonding film 1 having a rectangular planar shape as shown in FIG. A removable adhesive 7 is applied to the outer surface of the base material, and only the linear portion is removably adhered to the backing paper 8.

The thermocompression-bonding film 1 and the backing sheet 8 have the same plane shape and are formed to have the size of a confidential postcard or a letter to be removably adhered to each other. Further, as the transparent films 3 and 4, a resin film such as polyester or polyethylene having a thickness of several tens μm can be used, and the mount 8 is preferably made of paper.

When using the thermocompression-bonding film with the backing paper, first, as shown in FIG.
Is separated from the backing sheet 8 to peel off the adhesive 7, and the thermocompression bonding film 1 is sandwiched between the confidential surfaces. At this time, since the mount 8 is bonded to the thermocompression bonding film 1 in advance, the handling of each thermocompression bonding film 1 is extremely excellent. Further, when the thermocompression bonding film 1 is peeled off from the backing sheet 8, the thermocompression bonding film 1 tends to be charged with static electricity. Therefore, the thermocompression bonding film 1 easily adheres to a postcard or a letter of a letter. It can be carried out.

With the thermocompression-bonding film 1 sandwiched between the confidential surfaces in this manner, the film is heated to a predetermined temperature while pressing the postcard or the envelope. As a result, the adhesives 5 and 6 applied to the outer surfaces of the two transparent films 3 and 4 of the thermocompression bonding film 1 act, and the outer surfaces of the transparent films 3 and 4 are completely bonded to the corresponding confidential surfaces, respectively. You.

In the thermocompression-bonding film with a backing having the above-described structure, a removable adhesive 7 is applied to the outer surface of the transparent film 4 of the thermocompression bonding film 1 or the surface of the backing 8, and the adhesive 7 is applied. The thermocompression-bonded film 1 and the backing sheet 8 are superposed on each other, and pressure is applied so that they are removably adhered to each other.

In practice, as shown in FIG. 4, a thermocompression-bonded film 1 and a backing sheet 8 each wound into a roll are prepared, and both are rewound and superimposed on each other.
An adhesive 7 that can be re-peeled is applied to one surface of the unwound backing paper 8 by the roller 9, and the thermocompression bonding film 1 is contacted with the thermocompression bonding film 1 so that the surface on which the adhesive 7 is applied contacts the outer surface of the thermocompression bonding film 1. The mount 8 is overlaid. These thermocompression bonding films 1
After applying pressure to the backing sheet 8 with a pair of pressing rollers 10 and 11, the thermocompression bonding film 1 and the backing sheet 8 are releasably adhered via the adhesive 7 and then the width is reduced by the width slitters 12 and 13. Slit and cutter 14
And cut into sheets of a predetermined size.

In FIG. 4, the backing paper 8 is
Although the releasable adhesive 7 is applied to the thermocompression-bonding film 1, the releasable adhesive 7 may be applied to the outer surface of the thermocompression bonding film 1.

[0017]

As described above, according to the present invention, since the backing sheet is removably adhered to the thermocompression bonding film, it is excellent in handleability and easily adheres to the confidential surface of confidential postcards and envelopes. It can be performed. Further, even when a large number of thermocompression-bonded films with a backing paper are stored in a stacked state, the thermocompression-bonded films do not directly contact each other, so that the films are prevented from being welded in accordance with the temperature and pressure.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a thermocompression-bonding film with a backing sheet according to an embodiment of the present invention.

FIG. 2 is a plan view showing a thermocompression-bonded film with a backing sheet.

FIG. 3 is a cross-sectional view when the thermocompression bonding film is peeled off from the backing paper.

FIG. 4 is a diagram illustrating a method of manufacturing a thermocompression-bonded film with a backing paper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermocompression bonding film 2 Pseudo-adhesive layer 3,4 Transparent film 5,6 Heat-welding adhesive 7 Removable adhesive 8 Mount 9 Roller 10,11 Compression roller 12,13 Width slitter 14 Cutter

Claims (4)

(57) [Claims] An inner surface is removably adhered to each other and a heat-welding adhesive is applied to each outer surface.
A thermocompression-bonding film with a backing, comprising: a plurality of transparent films; and a backing removably adhered to an outer surface of at least one of the transparent films. 2. The backing sheet according to claim 1, wherein the thermocompression bonding film has a flat rectangular shape, and the backing sheet is removably adhered to the outer surface of one of the transparent films along one side of the rectangle. With thermocompression film. 3. An inner surface is removably adhered to each other, and a heat-welding adhesive is applied to each outer surface.
A re-peelable adhesive is applied to one outer surface of the thermo-compression film consisting of one sheet of transparent film or one surface of the backing sheet, and the thermo-compression film and the backing sheet are sandwiched between the surfaces on which the re-peelable adhesive is applied. A method for producing a thermocompression-bonded film with a backing sheet, wherein pressure is applied between the backing sheet and the thermocompression bonding film so that they are removably adhered. 4. An unwound thermocompression-bonding film and a backing sheet, each of which is wound into a roll, and removably adhered to one outer surface of the unwound thermocompression-bonding film or one side of the unwound mounting sheet. The thermocompression-bonding film and the backing were overlaid with the adhesive applied and the surface to which the removable adhesive was applied was sandwiched. 4. The method according to claim 3, wherein the mount and the thermocompression bonding film are cut into sheets of a predetermined size.