JPH0515824A - Partial coating method and device for sheet-shaped base material - Google Patents

Abstract

PURPOSE:To provide the partial coating method and device which can easily deal with a change in product specifications, etc., merely by adding simple constitution thereto. CONSTITUTION:Mask bodies 7, 8 of a prescribed film shape are wound around an upper-stage coating roll 4 constituting a roll coater 3 and a lower-stage coating roll 5 is rotated. The surface of a sheet-shaped base material 2 exclusive of the parts where the upper-stage coating roll 4 is covered with the mask bodies 7, 8 is coated with a coating liquid 6a when the sheet-shaped base material is passed between the two rolls under the supply of the coating liquid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for applying a coating solution partially to a sheet-like base material, such as an adhesive tape coated with an adhesive at predetermined intervals in the width direction. The present invention relates to a method and an apparatus for partially coating a sheet-shaped base material.

[0002]

2. Description of the Related Art Conventionally, as a part coater of this type, for example, a coating unit for supplying a coating liquid to a pair of rolls and a sheet-like base material passing between the rolls in a state of being superposed in the upper and lower stages. By using a roll coater as a main body, and arranging a dedicated jig in the vicinity of both rolls, specifically, by inserting a metal plate of a predetermined width between both rolls through which the coating liquid passes. It is known that a coating liquid is applied to the surface of a sheet-shaped substrate that passes between the rolls except for the metal plate portion. In this case, the dedicated jig is fixed to a predetermined stand provided separately.

[0003]

However, in the above-mentioned configuration of the prior art, it is necessary to specially prepare a dedicated jig, and when the specification of the product is changed, the dedicated jig is replaced according to the specification. However, there are problems that the replacement work is troublesome and that the metal plate forming the dedicated jig may come into contact with the roll and damage the roll.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is possible to easily cope with changes in product specifications by simply adding a simple structure while diverting a conventional roll coater. An object of the present invention is to provide a part coat method and a part coat device.

[0005]

In order to achieve the above object, the invention of claim 1 is in the form of a sheet between a pair of upper and lower rolls in which each axial direction is substantially parallel and at least the lower roll is rotatable. While passing through the base material, the coating liquid is supplied from the delivery source side of the sheet-shaped base material between the both rolls, and the surface side of the sheet-shaped base material that passes the coating liquid,
And, in the part coating method of the sheet-shaped base material for partially coating, the outer peripheral portion of the upper roll is characterized by performing the coating except a portion covered with a film-like mask body .

Further, in the invention of claim 2, at least the lower roll is rotatable, and a pair of upper and lower rolls whose axial directions are substantially parallel to each other are passed between the pair of rolls. As described above, the delivery means for delivering the sheet-shaped base material, the coating section for supplying the coating liquid from the delivery source side of the sheet-shaped base material between the pair of rolls, and the film-shaped body, the upper stage And a mask body that is wound around at least an outer peripheral portion of the roll facing the lower roll.

[0007]

Operation: A predetermined mask body is wound around the upper roll, the upper roll is placed on the lower roll, the lower roll is rotated, and the coating liquid is supplied between both rolls, while the sheet-shaped substrate Is passed, the coating is performed on the surface of the sheet-shaped substrate except for the portion covered by the mask body.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a part coat apparatus according to the present invention.

The present part coat apparatus is related to the adhesive coating of an adhesive tape, and the raw material portion 1 constituting the delivery means.
A sheet-shaped base material 2 is mounted on the sheet-shaped base material, and the sheet-shaped base material 2 is fed toward a roll coater 3 which constitutes a coating section. The roll coater 3 is generally composed of an upper coating roll 4 and a lower coating roll 5, and the extending directions of the respective shafts 3a, 4a of both coating rolls 3, 4 are substantially parallel.

An adhesive tank 6 is attached to the roll coater 3, and an adhesive liquid 6a such as an acrylic solvent adhesive or an acrylic emulsion adhesive is provided in the adhesive tank 6.
Is stored

A rotary drive source is connected to the shaft 5a of the lower coating roll 5 and the coating roll 5 is rotatable in the clockwise direction in FIG. 1, but the upper coating roll 5 is rotatable. 4 is usually fixed. The sheet-shaped base material 2 passes between the coating rolls 4 and 5.

Further, the upper coating roll 4 is made of a film-like body, and short ribbon-shaped mask bodies 7 and 8 are wound in a U-shape, and the upper ends of the mask bodies 7 and 8 are They are fixed to the locking members 9 and 10, respectively. Accordingly, the upper half of the coating roll 4 in the upper stage is covered with the mask bodies 7 and 8.

The mask bodies 7 and 8 are made of, for example, polyester resin, polyamide resin or the like, and the thickness of the mask bodies 7 and 8 is largely determined by the thickness of the pressure-sensitive adhesive to be coated on the sheet-shaped substrate 2. However, the interposition of the mask bodies 7 and 8 is set to such a value that the passage of the pressure-sensitive adhesive from the source side of the substrate 2 to the withdrawal side of the substrate 2 is blocked.

Since the first embodiment is constructed as described above, the coated portions 2A, 2C are provided on the surface of the sheet-shaped base material 2 that has passed through the roll coater 3 at predetermined intervals in the sheet width direction. 2E and non-coated portions 2B and 2D are formed. Needless to say, the non-coated portions 2B and 2D are portions where the adhesive 6a cannot pass due to the interposition of the mask bodies 7 and 8, respectively, and the coating is hindered.

In order to wind the mask bodies 7 and 8 around the upper coating roll 4, it is only necessary to insert them between the both rolls 4 and 5, and conversely, when the entire surface is coated or the like. , 8 can be simply pulled out from between the rolls 4 and 5 when no longer needed. In addition, when the mask bodies 7 and 8 are inserted, the coating roll 4 is rotated by hand or the like, if necessary, depending on the circumstances.

FIGS. 2 and 3 show a second embodiment, in which the mask body 70 according to the present embodiment is such that the cutout windows 70a, 70b, 70c are formed by punching or the like with a cutter or the like. When the mask body 70 is wound on the upper coating roll 4, the hollow windows 70a, 70a
The longitudinal directions of 0b and 70c are along the outer periphery of the lower half side of the coating roll 4. That is, the hollow window 7
The window widths of 0a, 70b, 70c correspond to the width of the coated portion. The other structure is similar to that of the first embodiment, and thus the duplicated description will be omitted.

Since the second embodiment is constructed as described above, as shown in FIG. 2, the cutout window 70 of the mask body 70 is formed.
Since the adhesive can pass only through the portions corresponding to a, 70b, and 70c, it becomes possible to separately coat the coated portions 2Ba, 2Da, 2Fa and the non-coated portions 2Aa, 2Ca2Ea. Since the intervals between the cut-out windows 70a, 70b, 70c are constant and can be formed with high precision, it is possible to improve the formation precision of the coated portion (coating pattern) as compared with the case of the first embodiment.

FIG. 4 shows a third embodiment. In this embodiment, one end of the long ribbon-shaped mask body 71 wound around the upper coating roll 4 rotatable around the shaft 4a is mounted on the feeding shaft 20 while the other end is wound. It is mounted on the take-up shaft 21. The other structure is similar to that of the first embodiment, and thus the duplicated description will be omitted.

According to the structure of the third embodiment, when the coating pattern varies due to wear or breakage of the contact portion with the base material 2 during use, for example, the feeding shaft 2
The mask body 71 can be fed out from 0 by a predetermined length.

FIG. 5 shows a fourth embodiment. In this embodiment, the mask body 72 as an endless belt band is wound between the upper coating roll 4 and the winding roll 22, and the shafts 4a and 22a of the both rolls 4 and 22 are intermittently or extremely superposed. Since the mask body 72 is configured to rotate at a low speed, the mask body 72 can be constantly moved and can be used for a long period of time. Other configurations and operations are the same as those in the fourth embodiment, and thus duplicated description will be omitted.

FIG. 6 shows a fifth embodiment, in which annular mask bodies 73 and 74 covering the entire circumference of the upper coating roll 4 are wound around the coating roll 4 at predetermined intervals. It is a thing. With such a configuration, the wound portions and the non-wound portions of the mask bodies 73 and 74 are the non-coated portions 2Bb and 2Db, the coated portions 2Ab and 2Cb, respectively.
While 2Eb can be accommodated, the locking members 9, 10 and the winding roll 22 in the above embodiment can be omitted, and the structure can be simplified accordingly.

[0022]

As described above, according to the first aspect of the invention, the sheet-shaped base material is passed between the pair of upper and lower rolls in which the respective axial directions are substantially parallel and at least the lower roll is rotatable. In addition, the coating liquid is supplied between the both rolls from the delivery source side of the sheet-shaped substrate, and the coating liquid is partially and partially coated on the surface side of the sheet-shaped substrate. In the method of part-coating a sheet-shaped substrate for
Since the coating is performed except for the portion where the outer peripheral portion of the upper roll is covered with a film-shaped mask body, without using a complicated structure such as a conventional dedicated jig In addition, while eliminating the need for complicated operations such as inserting a metal plate, it is sufficient to install a film mask body made of an easily available material, and such a film mask body has specifications for coated products. Can be easily processed and can be provided at low cost.

Further, according to the invention of claim 2, at least the lower roll is rotatable, and a pair of upper and lower rolls whose axial directions are substantially parallel to each other are provided between the pair of rolls. A delivery unit for feeding out the sheet-shaped base material so as to pass through, a coating unit that supplies a coating liquid from the delivery source side of the sheet-shaped base material between the pair of rolls, and a film-shaped body, Since the upper roll is provided with a mask body that is wound around at least an outer peripheral portion of the upper roll facing the lower roll, the method of the invention of claim 1 can be easily implemented. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing a configuration of a second embodiment.

FIG. 3 is a plan view of a mask body according to a second embodiment.

FIG. 4 is a front view showing the configuration of a third embodiment.

FIG. 5 is a front view showing the configuration of the fourth embodiment.

FIG. 6 is a perspective view of a main part showing the configuration of a fifth embodiment.

[Explanation of symbols]

1 original part (delivery means), 2 sheet-shaped substrate, 3 roll coater (coating department), 4 upper coating roll, 5 lower coating roll, 6a coating liquid, 7 Short ribbon mask body, 70 mask body, 71 long ribbon mask body, 72 Endless belt belt mask body.

Claims (2)

[Claims] 1. A sheet-like base material is passed between a pair of upper and lower rolls in which respective axial directions are substantially parallel and at least a lower roll is rotatable, and the sheet-like base material is provided between both rolls. The coating liquid is supplied from the delivery source side of the sheet-shaped substrate, and the coating liquid is applied to the surface side of the sheet-shaped substrate passing through the coating liquid, and A method for part-coating a sheet-shaped base material, characterized in that the coating is performed except for a portion where the outer peripheral portion of the upper roll is covered with a film-shaped mask body. 2. A pair of upper and lower rolls in which at least the lower rolls are rotatable and whose axial directions are substantially parallel to each other, and a sheet-shaped base material for passing between the pair of rolls. A delivery unit for delivering, a coating unit that supplies a coating liquid from a delivery source side of the sheet-shaped base material between the pair of rolls, and a film-shaped body, and at least the lower stage of the upper roll. A part-coating device for a sheet-shaped substrate, comprising: a mask body that is wound around an outer peripheral portion of the roll facing the roll.