JP2709901B2 - Pressure roll of adhesive paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure roll for adhesive paper . An adhesive sheet to the object of the present invention, to form a Noriso on one side of the peeling Hanareshi, paper or nonwoven fabric該糊layer, even to say was affixed a sheet made of a synthetic resin film.

[0002]

2. Description of the Related Art Conventionally, to form a sheet of paper or the like, pressure is basically applied between two rolls through a paper to compress the paper, as shown in FIG. Using the upper roll UR and lower roll DR of the straight roll as described above, when the shafts at both ends of the upper roll UR are depressed, bending occurs due to its own weight and a high nip pressure. As the amount increases, the amount of reduction in the center decreases, and the thickness of the paper varies. Therefore, at present, it is called a crown roll, as shown in FIG.
Rolls gradually increasing in diameter from both ends to the center are used. When the crown roll CR is used, the thickness of the paper in the width direction becomes uniform. However, the crown roll CR is difficult to process and requires high equipment costs, and it is also difficult to perform repair and additional processing when worn due to long-term use, so that the running cost is high.

On the other hand, the production of adhesive paper is currently performed as shown in FIG. That is, the glue 2a is applied to one side of the release paper 1 by the glue spray gun 11, and then the hot air blower 1
2 to form a glue layer 2 by drying the glue (by which the glue layer 2 has an adhesive strength). Then, glue, nonwoven fabric, synthetic resin film or the like is applied to the glue layer 2. The sheets 3 are stacked and pressed with a pair of rubber rollers 13 and 14 to adhere the sheets 3 to form the adhesive paper S, and the humidifier 15 applies humidity to the release paper 1 to complete the production of the adhesive paper S. After that, the pressure-sensitive adhesive paper S is used as a roll-shaped product S1 or a flat plate S2. By the way, when printing on the adhesive paper obtained by the above-mentioned conventional manufacturing method, there is a problem that printing accuracy is inferior. This is because, as shown in FIG. 7 , in the adhesive paper S obtained by the conventional manufacturing method, both the adhesive layer 2 and the sheet 3 have many irregularities and wrinkles, and therefore the ink is poorly applied and the outline is blurred.

[0004]

In view of the THE INVENTION Problems to be Solved] The present invention is such circumstances, the cost is low, can be molded layers of adhesive paper to a uniform thickness, surface manufacturing a very good adhesive paper printability smooth < An object of the present invention is to provide a pressure roll that can be manufactured.

[0005]

According to the present invention, there is provided a pressure roll comprising:
A glue layer is formed on one side of the release paper, and paper, nonwoven fabric,
Adhesive paper with a sheet made of synthetic resin film attachedThe front and back
Pressure roll for pressing from both sidesThe pressure roll
Consists of a pair of straight rolls,
Attach the pressurizing means, and attach the axis to the other roll.
At an arbitrary angle to the axis of the other roll
Axis adjustment deviceThe pair of straight rows
At least one of the rolls
A heating roll whose roll surface is heated by the heat source of the warehouse
There is a feature. In addition, the straight referred to in the present invention
Roll includes "slightly crowned roll"
Things.

[0006]

In the pressure roll of the present invention , a pair of rolls is pressed by the pressure means.
By pressing the rolls with each other and changing the crossing angle of the axes of the pair of rolls with the axis adjusting device, the pair of rolls can be brought into uniform contact in the roll longitudinal direction, and a uniform nip pressure can be obtained. Although it is an inexpensive pressure roll using a straight roll, the pressure-sensitive adhesive paper can have a uniform thickness in the entire region in the width direction. Then, the pressure roll Ru Oh by heating roll having a heating medium or heat source
In, Ki de be pressurized at the same time while the adhesive paper warmed,
The inner glue layer etc. can be effectively and uniformly formed, and the adhesive paper
Eliminate the wrinkles and unevenness, Ru can be to a uniform thickness in the smooth. Therefore, printability is very good .

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a pressure roll 30 according to an embodiment of the present invention.
FIG. In FIG. 1, 31 is an upper roll, 32
Is a lower roll, and both are straight rolls.
The upper roll 31 is installed orthogonal to the feed direction of the adhesive paper S, and the lower roll 32 is installed so that the roll axis intersects the upper roll 31 in a horizontal plane. In this manner, when the shaft portions at both ends of the upper roll 31 are lowered by a known reduction device such as a reduction cylinder as shown by an arrow F, a substantially uniform nip pressure is obtained over the entire length of the roll. That is, as shown in FIG.
As 1 is depressed to the position shown in phantom, the nip pressure will be equal over the entire length of the roll. The roll reduction amount and the nip pressure can be arbitrarily adjusted by changing the inclination angle θ of the lower roll 32. Therefore, in this embodiment, the cost can be reduced and the object to be pressed can be finished to a uniform thickness.

FIGS. 2 and 3 show a case where the principle of the pressure roll 30 is applied and a heating function is provided. Lower roll 3
The two support shafts 33 are rotatably supported by bearings 34, and hoses 36 are connected to both ends by rotary joints 35. A water passage hole 37 is protruded from both ends of the support shaft 33 to the vicinity of the center thereof, and opens inside the roll 32. The lower roll 32 is liquid-tightly partitioned by an outer roll body 32a having rigidity and a cylindrical shape and an inner partition wall 32b,
It has a hot water reservoir 32c. Hose 36, rotary joint 35, water hole 3
The roll surface of the lower roll 32 can be heated by always supplying and discharging through the hopper 7. The temperature of the hot water may be optimally set depending on the material and thickness of the pressure-sensitive adhesive paper S to be pressure-formed. Note that hot oil or steam may be supplied and discharged instead of hot water. The upper roll 31 is a normal pressure roll having no heating function, but both may have a heating function.

In this embodiment, an axis adjusting device 40 is mounted on the upper roll 31. Bearings 39 are attached to both ends of the support shaft 38 of the upper roll 31, and a slider 41 is attached to the upper surface of each bearing 39. On the other hand, an arm 44 is supported on the upper surface of the base 42 by a pin 43 so as to be vertically swingable, and a slide guide 45 is provided on the lower surface of the arm 44.
Is installed. The slider 41 is slidably fitted to the slide guide 45, and adjustment screws 46 are attached to both ends of the slide 41. By screwing the adjusting screw 46, the bearing 39 can be moved in the left and right directions indicated by arrows a and b. By moving the bearing 39 at both ends of the upper roll 31, the lower roll 32 is moved.
In contrast, the axis crossing angle as described with reference to FIG. 1 can be freely changed and set.

A lowering cylinder 47 is connected to the free end of the arm 44.
The stretching is performed to reduce the pressure. For adjusting the amount of pressurization, a pair of height-adjustable stoppers (not shown) are provided between the lower ends of the pair of bearings 39 and the upper ends of the pair of bearings 34. It is adjusted by changing. In the above embodiment, the axis adjustment device 40 is provided on the upper roll 31 side, but may be provided on the lower roll 32 side.

Another embodiment of the present invention will be described.
The upper and lower rolls 31 and 32 may be arranged horizontally as shown in FIG.
In addition to the layout of each one of the rolls 32, three rolls 31, 32, 31 may be arranged side by side as shown in FIG.

FIG. 8 is a process chart of a method for producing an adhesive paper using the pressure roll 30 of the present invention. First step I to fourth step
Step IV is substantially the same as the prior art, but the details are as follows. 1st process I: The raw material of the release paper 1 is fed out from the roll-shaped raw material roll R, and the glue 2a is applied on one surface of the release paper 1 by the glue spray gun 11. 2 step II: hot air blower 12 blows hot air to paste 2a
Allow to dry. Thereby, for example, the liquid paste 2a becomes viscous, and an adhesive force is generated. At this stage, the glue layer 2 is formed. However, the adhesive layer 2 at this stage has irregularities or undulations, and the thickness is not constant. 3 step III: placing the sheet 3 on the upper surface of the glue layer 2,
Pressure is applied between the rubber rollers 13 and 14. The sheet 3 to be affixed here includes paper, nonwoven fabric, synthetic resin film and the like. At this stage, the sheet 3 is stuck, but the thickness of the adhesive sheet S is not constant because the thickness of the adhesive layer 2 is not constant. Fourth step IV: Next, the adhesive paper S is put into the humidifier 15 and humidified. Thereby, the humidity of the release paper 1 dried in the second step is also returned to the original level, and an appropriate adhesive force with the adhesive layer 2 can be maintained.

Thereafter, the process enters the fifth step V immediately or after necessary intermediate steps. This fifth step V is an important feature of the present invention, and the pressure-sensitive roller 30 presses the pressure-sensitive adhesive paper S after the fourth step. The pressure roller 30 is different from the normal one, the heat medium (for example, hot water, hot oil, hot liquid or gas having such vapor) or built heat source (such as an electric heater) by the adhesive paper S warming There is a feature in that the adhesive layer 2 is softened by this heating action and is pressed down from both the front and back surfaces, so that the thickness of the adhesive layer 2 becomes uniform. The thickness of the sheet 3 itself becomes uniform by pressing. Accordingly, as shown in FIG. 6,
The surface of the adhesive paper S becomes extremely smooth, and the printability is improved. The pressure-sensitive adhesive paper S having a smooth surface as described above is formed into a roll product S1 or a flat plate S2, and is stored or printed.

According to the pressure roll 30, the adhesive paper S
Since the adhesive layer 2 is heated and pressurized to a temperature at which it is easy to soften,
The surface smoothness can be greatly increased. In this case, if the gap between the upper and lower rolls 31 and 32 is appropriately set in order to adjust the amount of pressure applied by the upper and lower rolls 31 and 32, a desired thickness can be formed on the adhesive paper without excessive reduction. Can be.

[0015]

According to the present invention, the cost is low and the viscosity is easy.
Since the paper can be molded to a uniform thickness, the thickness of the adhesive layer and the thickness of the release paper become uniform, and the surface smoothness of the release paper improves,
Ink paste and contours become clear and printability is greatly improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a pressure roll of the present invention.

FIG. 2 is a partial cross-sectional front view of a pressure roll according to an embodiment of the present invention.

FIG. 3 is a side view of the pressure roll of FIG.

FIG. 4 is an explanatory diagram of an example of a roll layout of a pressure roll.

FIG. 5 is an explanatory diagram of another example of the roll layout of the pressure roll.

FIG. 6 is an end view of the pressure-sensitive adhesive paper obtained by the present invention.

FIG. 7 is an end view of an adhesive paper obtained by a conventional manufacturing method.

FIG. 8 is a process chart of a method for producing pressure-sensitive adhesive paper using a pressure roll of the present invention.

FIG. 9 is an explanatory diagram of a problem when a straight roll is used as a pressure roll.

FIG. 10 is an explanatory diagram of a crown roll.

FIG. 11 is a process chart of a conventional method for producing an adhesive paper.

[Explanation of symbols]

1 release paper 2 glue layer 3
Sheet 30 Pressure roll 31 Upper roll 3
2 Lower roll 40 Axis adjustment device

Claims (1)

(57) [Claims] An adhesive layer is formed on one side of a release paper, and a paper layer is formed on the adhesive layer.
And a sheet made of non-woven fabric and synthetic resin film
A pressure roll for pressing the pressure- sensitive adhesive paper from both front and back surfaces, the pressure roll being composed of a pair of straight rolls, a pressure means attached to one roll, and the axis of the other roll to the one roll. attaching an axis adjusting device so as to intersect at an arbitrary angle with respect to the axis, the roll of the least hand also of the pair of straight rolls, the roll surface is heated by the supply or internal heat source of the heating medium adhesive paper <br/> pressure roll, characterized in that the a heating roll.