JPH0541422B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves continuously feeding out a pre-coated film, which has been coated and fixed with a heat-sensitive adhesive resin, one by one, in order to apply a gloss finish to a paper surface. The present invention relates to a method in which the precoated film is laminated onto a sheet of paper, and only the precoated film at the boundary between the front precoated film laminated paper and the subsequent precoated film laminated paper is cut with a cutter or knife.

[Prior Art] In JP-A-60-184826, JP-A-61-35933, etc., as shown in FIG. Then, the front end of the succeeding printed paper strip a' is fed into the first crimping section with the required length l overlapped, and then the film b
While heating and melting the heat-sensitive adhesive resin b' with the endless steel belt of the first crimping section, the front and rear sheets a are bonded together.
Film b was glued all over a'. In this state, the leading edge c of the succeeding sheet a' and the leading edge c of the preceding sheet a'
A non-adhesive portion d is formed between the surface of the substrate and the surface of the substrate. Conventionally, when cutting out a preceding sheet a and a succeeding sheet a',
This non-bonded part d was separated by making a cut with a knife or a cutter in the direction of the arrow. As a result, as shown in FIG. 2, at the rear end of the preceding sheet a, there is a portion where the film is not adhered by at least a length _l1 , and this portion is discarded during processing. At the same time, the width l portion of the front end of the succeeding sheet a' is pressed with a constant pressure between the heating roll and the pressure roll while the two sheets are overlapped, so the thickness of the overlapped portion changes and an indentation occurs. It was not used and was discarded because it was not used or the gloss was different from other parts.

[Problems to be Solved by the Invention] The present invention involves wrapping an endless steel belt around the outer periphery of the front and back sheets of paper sent from the paper feed table to the transfer table so that the edges of the sheets face each other without overlapping each other. A sheet of paper pre-coated with a heat-sensitive adhesive resin is heated and melted by the endless steel belt of the heating roll, which has the endless steel belt wrapped around its outer periphery, and pressure is applied to the sheet that is sent out below. The paper sheet with the precoat film bonded under pressure is sent to the cutting section in a continuous state, and only the precoat film is cut along the opposing edge surfaces of the leading sheet and the trailing sheet. This is the purpose.

[Means for Solving the Problems] The present invention is a method for continuously manufacturing sheets to which a polishing film is adhered, in which the sheets stacked on a paper feed tray are The sheets of paper are successively fed one by one to a transfer table so that the edges do not overlap, and a continuous polishing film containing a heat-sensitive adhesive resin is layered on the surface of each sheet and cooled with the first heating roll. The polishing film is supplied to the insertion side of the endless steel belt suspended between the heating roll and heated under pressure to adhere the polishing film to the surface of each sheet, and the polishing film is released from the discharge side of the endless steel belt. Each continuous sheet of paper that has been glued is sent out, and the glazing film is cut with a cutter, knife, etc. at the joint between the leading sheet and the following sheet, and the glazing film is then glued to the sheet. This is a method for producing sheets of paper laminated with a polishing film, characterized in that the paper is obtained.

[Function] The present invention is capable of suspending each sheet sent from a paper feed table to a transfer table on a heating roll and a cooling/heating roll together with a polishing film having a heat-sensitive adhesive resin while maintaining the same plane without overlapping each sheet. A polishing film is applied to the entire surface of each sheet by applying heat and pressure to the sheet between the endless steel belt and the pressure roll, and then polishing the sheet with a cutter or the like without leaving any impressions on the sheet. This method separates continuous sheets one by one by cutting only the film for delivery.

[Example] 1 is a polishing film made of a pre-coated film, in which a transparent film made of polypropylene or the like is coated with a heat-sensitive adhesive resin b made of a resin mixed with polyethylene or polypropylene dissolved in thinner, alcohol, etc. After coating, remove these harmful solvents from the film at room temperature or by heating.
Remove it and roll it into a long roll.

2 is a paper feed tray, on which sheets 3, 3', 3'', etc. cut to a fixed size and to be polished are stacked.
The upper layers are sequentially sent to the transfer table 17. Although not shown, the transfer table 17 is equipped with a transfer belt, a front registration device, and a horizontal registration device, and the sheets 3, 3', 3'', etc. sent out from the paper feed table 2 are separated by a vertical registration device and a horizontal registration device. It is fed out while being adjusted to a predetermined position by a registration device.The front end d of the trailing sheet 3' is positioned parallel to the edge surface so as not to overlap the rear end c of the preceding sheet 3. The leading sheet 3 and the trailing sheet 3' are regulated and sent out by a vertical registration device and a horizontal registration device in the same way as the preceding sheet 3. A gap may be provided between the leading sheet 3 and the trailing sheet 3', or a gap may be provided between the leading sheet 3 and the trailing sheet 3'. When the speed of the transfer belt on the transfer table 17 becomes equal to the speed of the film, a small motor is used to accelerate or decelerate the transfer belt to adjust the speed of both. Match.

4 is an endless steel belt for polishing; 5 is an endless pressure belt;
3″... and the precoat film 1 are attached to these endless steel belts 4 and endless pressure belts 5.
supplied between. 6 and 7 are a first heating roll and a second heating roll on the insertion side, and 8 is a cooling/heating roll provided on the discharge side, and the endless steel belt 4 for polishing is suspended between these rolls. The heating rolls 6 and 7 are heated by infrared heating which can be adjusted to a desired temperature using a temperature control device built into these rolls. In addition to infrared rays, gas, steam, etc. can be used to heat the first and second heating rolls 6 and 7. A refrigerant such as Freon gas or ammonia gas is used for cooling the cooling/heating roll 8, and steam, infrared rays, gas, etc. are used for heating. Further, if necessary, a cooling water discharge nozzle or a heating chamber for cooling the endless steel belt 4 is provided between the heating roll 6 and the cooling/heating roll 8. The heating temperature of the heating rolls 6 and 7 is a temperature suitable for removing the solvent and melting the heat-sensitive adhesive resin applied to the film.

9, 10, and 11 are a first pressure roll, a second pressure roll, and a third pressure roll, each of which has an endless pressure belt 5 suspended thereon facing the first heating roll 6, second heating roll 7, and cooling/heating roll 8, respectively. An endless pressure belt 5, which is a pressure roll, moves in the same direction at the same speed while coming into close contact with the outer surface of the belt on the traveling side of the endless steel belt 4 for polishing. The lower surface of the sheet 3 adhered to the lower outer surface is placed and the sheet is conveyed to the discharge side while being pressed so that it does not peel off or shift from the endless steel belt for polishing. During this time, the heat from the endless steel belt keeps the temperature of the paper low because the back side of the sheet is in contact with the rubber endless pressure belt.

Precoat film 1 is wound into a roll and placed on machine 1.
The guide rolls 14, 1 are mounted on a frame 13 provided in the
5, 16, 17, 18, and 19, it passes between the endless steel belt 4 heated by the first heating roll 6 and the second heating roll 7, and the endless pressure belt 5, and is wound up by the winding machine 20. On the other hand, the sheet 3 is guided by the guide belt 21 from the paper feed table 2 and is fed between the endless steel belt 4 and the endless pressure belt 5 so as to adhere the heat-sensitive adhesive resin layer of the precoated film 1 to the printing surface. The film is wound together with the precoat film 1 in a winder 20 while being pressurized. First heating roll 6 and first pressure roll 9
The film adhesive surface of the sheet 3 supplied between the endless steel belt 4 and the endless pressure belt 5 faces upward, and the heat-sensitive adhesive resin surface of the film 1 faces downward. It's summery. Therefore, the film 1 is adhered to the glossy surface of the sheet 3. endless steel belt 4
is heated by the conductive heat of the first heating roll 6 and the second heating roll 7, so the heat-sensitive adhesive resin on the bottom surface of the film is melted and adheres to the top surface of the sheet 3, thereby separating the sheet 3 and the film 1. Heat and pressure bonding is performed using an endless steel belt 4 and an endless pressure belt 5. The running speeds of the endless steel belt 4 and the endless pressure belt 5 are the same, and since the heat-sensitive adhesive resin of the film does not contain a solvent, the time required to volatilize the solvent is shortened, allowing the film bonding work to be carried out at a high speed. can be done. Depending on the properties of the heat-sensitive adhesive resin or the paper quality of the sheet 3, in order to re-melt the heat-sensitive adhesive resin on the sheet 3, the sheet 3 is bonded with the second heating roll 7, and then the endless steel belt 4 and the endless pressure belt 5 are bonded. Heat and pressurize. In addition, when it is necessary to quickly fix the heat-sensitive adhesive resin, cold water is applied to the endless steel belt 4 with a nozzle on the side between the second pressure roll 10 and the third pressure roll 11 on which the endless steel belt 4 runs. The endless steel belt 4 may be rapidly cooled by spraying it. On the other hand, in order to adhere and loosely fix the film 1 to the sheet 3, a third heating roll, a fourth heating roll, etc. Place pressure rolls respectively.

When the sheet 3 to which the film 1 is adhered reaches between the endless steel belt 4 and the endless pressure belt 5 on the side of the cooling/heating roll 8 and the third pressure roll 11, the sheet 3 and the film 1 are bonded together. is again pressurized at high or low temperature, and the film 1 is more closely fixed to the sheet 3 and finished.

After the above operations are completed, the work is wound up by the winding device 20.

Sheets 3 and 3' on which film 1 is laminated
To separate the film, the cutting edge is moved to a temperature higher than the melting temperature of the film by operating in accordance with the traveling speed of the sheet 3.
The sheets are cut out using a cutter device 22 such as a rotary cutter or knife heated to 200°C to 300°C and stacked one after another.

[Effects of the Invention] As described above, the present invention involves coating a film with a heat-sensitive adhesive resin in advance, volatilizing the solvent contained in the heat-sensitive adhesive resin, and then using the obtained film with the heat-sensitive adhesive resin and a paper feed stand. The sheet is sent to a transfer table from the holder, aligned, the edge side of the trailing sheet is lined up with the edge side of the preceding sheet, and the sheets with no overlapping parts are heated by a heating roll at the same advancing speed. The film is fed between a rotating endless steel belt and a rotating endless pressure belt, which is then heated and pressurized to form sheets with exactly the same plane on both front and rear sheets without stretching or contracting the film. It can be fixed closely, and this close fixing work can be done quickly and hygienically.
Since the film is thermally bonded to the entire surface of the sheet, the area used for the sheet becomes larger, and it can be installed in a narrow space.
It has the effect of making the finish neater, and in high-speed operation, the sheets tend to peel off from the endless steel belt due to centrifugal force, but the endless pressure belt prevents the sheets from peeling off. In order to prevent this and the endless pressure belt to be cooled away from the endless steel belt during the return run, the sheet and film are always bonded under pressure and heat at a constant temperature at a constant temperature, unlike conventional lamination. It is possible to speed up the work by about 3 times.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional end-ply sheet laminated with film, Fig. 2 is an enlarged perspective view of a portion of the same sheet, and Fig. 3 is a sheet to which a precoated film coat according to the present invention is adhered. Side view of leaf, No. 4
The figure is an enlarged perspective view of the same sheet, FIG. 5 is a side view of the precoated film laminator, and FIG. 6 is a plan view of the same.

Claims (1)

[Claims] 1 A method of continuously manufacturing sheets to which a polishing film is adhered, in which the sheets are stacked on a paper feed tray one by one so that the edges of the front and back sheets do not overlap. Continuously sending it to the transfer table,
A polishing film having a continuous heat-sensitive adhesive resin is layered on the surface of each sheet, and is supplied to the insertion side of an endless steel belt suspended between a first heating roll and a cooling/heating roll, and is heated under pressure. , a polishing film is adhered to the surface of each sheet, and the polishing film is adhered to the surface of the endless steel belt, and each successive sheet is sent out, and the leading sheet and the following sheet are separated. A sheet of paper laminated with a glazing film, characterized in that the glazing film is cut with a cutter, knife, etc. at the joint of the paper to obtain a sheet to which the glazing film is adhered. manufacturing method.