JPH06391B2 - Laminated film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A Field of Industrial Application The present invention relates to a laminated film, and is particularly suitable for application to an automatic laminating apparatus for automatically adhering a protective film to the surface of a base paper inserted through a base paper insertion port. It is a thing.

B Outline of the Invention The present invention is a laminated film comprising a base film, a protective film and an adhesive layer which are attached at a predetermined interval along the longitudinal direction, and a protective film and an adhesive layer are attached to the base film at the tip of the protective film. By forming a temporary fixing portion for temporary fixing, the protective film and the adhesive layer are prevented from peeling off from the base film before laminating.

C Prior Art As an automatic laminating apparatus of this type, the one shown in FIG. 4 is used. In FIG. 4, reference numeral 1 denotes a supply reel, which supplies the laminating film 2 wound around the reel body to the laminating roller 5 by sequentially passing around the guide rollers 3 and 4. The laminating roller 5 is separately driven by a drive motor to rotate counterclockwise as shown by an arrow 9, so that the laminating film 2 is pulled out from the supply reel 1.

As shown in FIG. 5, the laminate film 2 has a base film 2A made of a heat-resistant synthetic resin material, and the surface of the base film 2A on the laminating roller 5 side is provided with a sixth film.
As shown in the figure, a protective film B and an adhesive layer 2C made of a thermoplastic resin material with a predetermined spacing d in the longitudinal direction.
Are attached so as to be sequentially laminated.

As shown in FIG. 6, the protective film 2B and the adhesive layer 2C are formed in a rectangular shape as a whole so as to have a length slightly shorter than the longitudinal and lateral lengths of the long base paper L, for example. As shown in FIG. 7, the base paper L is the adhesive layer 2
The adhesive layer 2 is provided on the outside of the base paper L when aligned on C.
C and the protective film 2B are arranged so as not to protrude from the base paper L.

In addition, in practice, the base paper L is 1 from the base paper insertion port (not shown).
The sheets are fed one by one through the sheet feeding mechanism 7, and are superposed on the protective film 2B and the adhesive layer 2C positioned at the upstream side position of the laminating roller 5.

Further, a sublimation dye molecule obtained by transferring an original image by a printing device is attached to the surface of the base paper L separately, and the base paper L and the adhesive layer 2C or a protective layer are protected by the heat of the dye molecule heated during lamination. The surface of the film 2B is protected while being dispersed and fixed on the film 2B.

A laminating heater 6 is provided on the surface of the laminating roller 5 so as to be in pressure contact with the laminating film 2 interposed therebetween. As described above with reference to FIGS. 6 and 7, the base paper L is aligned on the adhesive layer 2C. In this state, the laminate film 2 and the base paper L pass between the laminate roller 5 and the laminate heater 6 to heat the adhesive layer 2C and the protective film 2B by the laminate heater 6. At this time, the protective film 2B is slightly softened, while the adhesive layer 2C is activated in such a state that a sufficient adhesive force is produced, and thus the protective film 2B is easily peeled from the base film 2A. At the same time, a state in which the adhesive layer 2C easily adheres to the base paper L is obtained. The activation of the adhesive layer 2C and the protective film 2B is performed by the adhesive layer 2C and the protective film 2B.
Occurs while the base paper L passes through the laminating heater 6, and accordingly, the temperature rapidly increases as the adhesive layer 2C and the protective film 2B and the base paper L exit from the downstream side of the laminating heater 6. As it cools down, the adhesive material layer 2C rapidly solidifies, so that a state in which the protective film 2B is adhered onto the surface of the base paper L via the adhesive material layer 2C is obtained. At this time, since the adhesive force of the adhesive layer 2C is extremely large, the protective film 2B is put together with the base paper L in a state where it can be peeled from the base film 2A.

After such a laminating heat treatment, the laminating film 2 is sent out along with the base paper L along the non-paper mechanism 9 for the base paper L, and eventually reaches the guide roller 10.

Here, as shown in FIG. 8, the guide roller 10 transports the base film 2A of the laminate film 2 so that the base film 2A is wound up in a direction in which it is separated from the paper discharge mechanism 9. At this time, the base film 2A is separated in a direction perpendicular to the base paper L, whereas the adhesive layer 2C is adhered and solidified on the base paper L with a strong adhesive force. The material layer 2C and the protective film 2B are peeled from the base film 2A and remain on the base paper L.

As a result of such an operation, as shown in FIG. 9, the finished paper formed by adhering the protective film 2B on the base paper L via the adhesive layer 2C is discharged from the paper discharge port by the paper discharge mechanism 9 to the outside. Will be discharged to.

The above operation is repeated each time the base paper L is inserted into the paper feed mechanism 7, and the next protective film 2B and the adhesive layer 2C (the first protective film 2B) formed on the base film 2A while keeping a predetermined interval therebetween. (Fig. 6) is positioned at the upstream side position of the laminating roller 5, and is in a state of waiting for the next base paper L to be inserted. Thus, every time the base paper L is inserted, the laminating operation is automatically repeated.

D Problem to be Solved by the Invention By the way, in the case of the laminated film 2 having the configuration described above with reference to FIGS. 5 and 6, the adhesive force between the protective film 2B and the base film 2A cannot be increased so much. Before being fed from the supply reel 1 to the laminating roller 5 and the laminating heater 6, a protective film 2B
2B and the adhesive layer 2C may be partially or wholly separated from the base film 2A.

The cause is the base film 2A of the protective film 2B.
If the adhesion force to is too large, after the laminating process by the laminating roller 5 and the laminating heater 6,
When the base film 2A is to be peeled off from the protective film 2B by the guide roller 10, as shown in FIG. 10, the protective film 2B is wound around the guide roller 10 while being attached to the base film A. There is a fear. In such a state, the adhesive layer 2C
Since the adhesive strength of the base paper L to the
Is attached to the base film 2A while the guide roller 10
The result is that it is transferred in the direction of the take-up reel 12 via the guide roller 11. This state means that a so-called paper jam accident has occurred in which the base paper L cannot be discharged to the discharge port.

In order to prevent such a paper jam accident, the adhesion of the protective film 2B to the base film 2A must be selected to a value that is as small as practically necessary, and as a result, the laminate film 2 is laminated. Before being supplied between the roller 5 and the laminating heater 6, the adhesive layer 2C and the protective film 2B are easily separated from the base film 2A. This peeling phenomenon is likely to occur particularly at the tip portion 2E (FIG. 11). As a result, firstly, when the laminate film 2 is pulled out from the supply reel 1, the protective film 2B and the adhesive layer 2C are wholly peeled from the surface of the base film 2A, so that the base film 2A is overwound. Inconvenience that it adheres to the back surface of the can occur. In this state, the protective film 2B
And the adhesive layer 2C is peeled off from the surface of the base film 2A and adhered to the back surface of the base film 2A,
If this state is left, the adhesive layer 2C stuck to the back surface
Eventually, it will come into direct contact with the laminate heater 6 side, which will be activated by the heat and adhere to the laminate heater 6 to cause a secondary accident.

Even if the entire surface is not peeled off, secondly, as described above with reference to FIG. 11, for example, the lamination heater 6 together with the base paper L is partially peeled off.
When it is sent between the laminating roller 5 and the laminating roller 5, a phenomenon occurs in which the air bubbles 16 are caught between the protective film 2B and the base film 2A as shown in FIG.
In this state, the protective film 2B and the adhesive layer 2
C is heated by the laminating heater 6 to be softened, and the bubbles 16 are pressed by the laminating roller 5 and the laminating heater 6, whereby the protective film 2B and the adhesive layer 2C are torn to form a hole. If such holes are formed, a so-called pockmark can be seen on the surface of the finished paper 15 (FIG. 9), which may result in an unsightly product as a whole.

The present invention has been made in consideration of the above points, and the protective film 2B is peeled off from the base film 2A before the laminating film 2 is inserted between the laminating roller 5 and the laminating heater 6. The present invention intends to propose a laminated film capable of preventing the possibility of the occurrence of various results.

E Means for Solving the Problems In order to solve the above problems, in the present invention, the protective film 2B and the adhesive layer 2C are sequentially laminated on the base film 2A at a predetermined interval along the longitudinal direction thereof. As described above, the base film 2A is transferred in the longitudinal direction, and the base paper inserted from the base paper insertion port is laminated on the adhesive layer. As a result, the protective film is attached to the adhesive layer. In the laminated film 2 adhered to the base paper via the protective film 2B, the protective film 2B is temporarily fixed on the base film 2A at a position rearward by a predetermined distance from the leading end of the protective film 2B in the transfer direction. The temporary fixing portion 21 is formed.

F action The temporary fixing portion 21 effectively prevents the protective film 2B from peeling off from the base film 2A in the state before the laminating process. However, when the base film is peeled off from the protective film after the protective film has been adhered to the base paper via the adhesive layer by laminating, the temporary fixing portion 21 is The film 2A can retain only an adhesive force such that the film 2A can be easily peeled off from the protective film 2B, and thus the base film 2A can be easily peeled off from the protective film 2B.

G Embodiment One embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 and 2 with the same reference numerals as those in FIGS. 5 and 6, the laminate film 2 has a band-shaped temporary structure at the tips of the protective films 2B and the adhesive layer 2C. The stopper 21 is formed.

The strip-shaped stopper portion 21 is formed by pressing the laminate film 2 against a bar-shaped jig having a number of relatively sharp projections protruding from the surface thereof, and the projections cause the knurls to form a base film 2A and a protective film. 2B and the adhesive layer 2C are formed by stamping so as to penetrate the thickness thereof. Thus, the base film 2A, the protective film 2
B, the adhesive layer 2C forms a temporary fixing portion 21 for holding each other with a relatively large frictional force by the jagged portions.

The position of the band-shaped temporary fixing portion 21 is a predetermined distance (for example, 5 [m] from the tips of the protective film 2B and the adhesive layer 2C.
m]), and is formed over the entire width in the lateral direction, for example, at a position retracted inward.

The position of the band-shaped temporary fixing portion 21 is selected so as to come to the margin area 27 left outside the image area 26 of the finished paper 25 as shown in FIG.

In the above structure, the temporary fixing portion 21 is the protective film 2 for the base film 2A of the laminate film 2.
It has a function to reinforce the adhesive force of B at the tip portion. However, the reinforcing force is selected so that when the base film 2A receives a force such that the base film 2A is peeled from the base paper 4 at the position of the guide roller 10 (FIG. 4), the base film 2A is peeled off. . Therefore, there is no risk of causing a so-called paper jam accident.

On the other hand, during the period in which the laminate film 2 is supplied from the supply reel 1 to the laminating roller 5,
While the protective film 2B is easily attached to the base film 2A from the tip portion thereof, the temporary fixing portion 21 is formed at a position located inside the tip portion by a predetermined distance. This means that the laminated roller 5 is located at a position avoiding the easy peeling condition, and accordingly, the laminating roller 5
Even if the protective film 2B starts to partially peel off from the base film 2A before entering, it can be stopped by the temporary fixing portion 21, and thus the protective film 2B is totally peeled off from the base film 2A. Can be effectively avoided.

Further, even if the tip portion is partially peeled off and the air bubble 16 is caught as described above with reference to FIGS. 11 and 12, the protective film 2B and the adhesive layer 2C for the air bubble portion.
Even if the sheet is torn, its position remains outside the temporary fixing portion 21, so that the margin area 27 of the finished paper 25 can be suppressed so that a so-called patter can be formed, and eventually the image area 26 of the finished paper 25 can be suppressed. It is possible to prevent the possibility of leaving unsightly defects.

In the above embodiment, the temporary fixing portion 21 is formed over the entire surface of the laminate film 2 in the lateral direction, but it may be formed intermittently with a relatively small gap therebetween. Even in this case, the same effect as the above case can be obtained.

Further, in the above description, the case where the reinforcing force is generated by forming the jagged portion that causes the mechanical frictional force between the protective film 2B and the base film 2A as the temporary fixing portion 21 has been described. However, in place of this, the protective film 2B may be attached to the base film 2A with a relatively strong force by heat treatment, or an adhesive may be used to obtain a relatively weak reinforcing force by its adhesive force. Is also good.

H Effect of the Invention As described above, according to the present invention, by forming the temporary fixing portion 21 for reinforcing the adhesive force between the protective film 2B and the base film 2A at the position of the tip of the protective film, the protective film is formed. 2B and the adhesive layer 2C can be easily peeled off before starting the laminating operation, or a laminate film that can avoid the possibility of generating bubbles in the image area 26 of the base paper L during the laminating process can be easily realized. You can

[Brief description of drawings]

1 and 2 are enlarged cross-sectional views and plan views showing an embodiment of a laminate film according to the present invention, FIG. 3 is a plan view showing finished paper, and FIG. 4 is a schematic diagram showing an automatic laminating apparatus. 5 and 6 are enlarged sectional views and plan views showing a conventional laminated film, FIG. 7 is a sectional view showing the positional relationship between the laminated film and the base paper, and FIGS.
The drawings are a plan view and a cross-sectional view showing conventional problems. 1 ... Supply reel, 2 ... Laminated film, 3,
4, 10, 11 ... Guide roller, 2A ... Base film, 2B ... Protective film, 2C ... Adhesive layer, 5
...... Laminating roller, 6 …… Laminating heater, 12
…… Take-up reel, 16 …… Air bubbles, 21 …… Temporary fixing part.

Claims (1)

[Claims] 1. A base film is inserted by sequentially adhering a protective film and an adhesive layer on a base film at a predetermined interval along the longitudinal direction of the base film, and transferring the base film in the longitudinal direction. In a laminate film adapted to be laminated in a state where the base paper inserted from the mouth is superposed on the adhesive layer, and as a result, the protective film is adhered onto the base paper through the adhesive layer, A laminated film, characterized in that a temporary fixing portion for temporarily fixing the protective film to the base film is formed in a width direction at a position rearward from a front end of the protective film in the transfer direction by a predetermined distance.