JPH06435A - Apparatus and method for partially applying self-adhesive - Google Patents

Abstract

PURPOSE:To alter the width of a non-coating part and that of a coating part by loosening a lip fixing bolt without re-tightening the same by providing a backup roll and a fountain die and partially closing the gap between lips in a lateral direction by the strip member stretched over the lips of the fountain die. CONSTITUTION:A fountain die 1 and a backup roll 2 are provided and a movable lip 11 and a fixed lip 12 are provided to the fountain die 1 so as to leave a gap 13 and a plurality of cotter blocks 14 whose upper surfaces are inclined are slid before and behind along the inclined bottom surface of the movable lip 11 to move the movable lip 11 up and down to control the coating thickness of a self-adhesive. A strip member 3 is provided above the gap 13 to partially close the gap 13 between the lips in a lateral direction. The self-adhesive extruded from the unclosed gap 13 is applied to a support A in a stripe pattern and, by replacing or moving the strip member 3, a lip fixing bolt is loosened without being re-tightened and the width or interval of a non-coating part can be altered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive partial coating apparatus and partial coating method.

[0002]

2. Description of the Related Art There are various known coating apparatuses for forming a pressure-sensitive adhesive layer on a support, but the pressure-sensitive adhesive is fed to the die head under pressure and extruded from the gap of the lip onto the support. A fountain die coater, which is directly applied, is used as a method suitable for solventless use.

In the case of partial coating by this method, the adhesive passage is partially closed by inserting a spacer in the gap of the lip which corresponds to the non-coated portion (Japan Adhesive Tape Industry Association). , Pp. 185, 187, "Adhesive Handbook," issued March 2, 1988).

[0004]

However, in this method, when changing the width and the interval of the non-coated portion, it is necessary to loosen the lip fixing bolts one by one to move the spacer in and out, which requires a lot of man-hours. Further, there is a problem that the width of the lip gap is slightly deviated by loosening and re-tightening the lip fixing bolt, which affects the coating accuracy.

The present invention solves the above-mentioned problems of the prior art, and can partially change the widths of the non-coated part and the coated part without loosening and re-tightening the lip fixing bolts. And a partial coating method.

[0006]

A partial coating apparatus for pressure-sensitive adhesives of the present invention comprises a backup roll and a fountain die, a band-shaped body is provided between the lips of the fountain die, and a gap between the lips is formed by the band-shaped body. It is characterized in that it is partially closed in the width direction.

In the method for partially coating the pressure-sensitive adhesive of the present invention, a band-shaped body is provided between the lips so that the gap between the lips is partially closed in the width direction from the gap between the opened lips of the fountain die. It is characterized in that the adhesive is discharged and applied.

In the present invention, in order to construct the strip-shaped body,
Both ends may be fixed using bolts or adhesive tape.

The band-shaped body used in the present invention is not particularly limited as long as it has the strength to withstand the friction with the support and does not damage the lip.
300 μm brass, metal foil such as copper, and synthetic resin film such as polyethylene terephthalate are preferably used.

The width, number and spacing of the band-shaped members to be installed are not particularly limited, and are determined according to the widths of the non-coated part and the coated part of the adhesive.

The belt-shaped body is easy to handle, requires a small number of fixing steps during installation, and is fixed in advance at both ends so that the fixed position is fixed regardless of the number of belt-shaped bodies installed between the lips and the interval. May be fixed to another strip-shaped body to have a substantially ladder shape, or a through hole may be continuously provided at the center of one strip to have a substantially ladder shape.

The object whose both ends are fixed when the strip is erected may be either the side wall of the fountain die or the side wall of the pedestal on which the fountain die is mounted. Since the fountain die is usually heated, There is an advantage that the attachment work is easy and the attachment work is not loosened.

When a hot-melt adhesive is used as the adhesive, the strip must have a heat resistance of about 200 ° C. in addition to the above conditions.

[0014]

The adhesive partial coating apparatus of the present invention has a structure in which the gap between the lips of the fountain die is partially closed in the width direction by the strips provided between the lips of the fountain die. Allows you to change the width and spacing of the non-coated parts without loosening and re-tightening the lip fixing bolts.

In the partial coating method for the pressure-sensitive adhesive of the present invention, the gap between the lips is partially closed in the width direction by constructing the strip between the lips, so that the work for adjusting the gap between the lips is unnecessary. Therefore, the number of man-hours required is small, and the coating accuracy is not affected at all.

[0016]

EXAMPLES Examples of the present invention will be specifically described below. FIG. 1 is a cross-sectional view showing an embodiment of a partial coating device for an adhesive of the present invention, and FIG. 2 is a perspective view of a fountain die. 1 is a fountain die, 2 is a backup roll, and A is a support. In the fountain die 1, 11 is a movable lip and 12 is a fixed lip, both of which are provided with a gap 13 therebetween. Below the inclined bottom surface of the movable lip 11,
A plurality of cotter blocks 14 each having an inclined upper surface are continuously provided, and the movable lip 11 can be moved up and down by sliding the cotter blocks 14 back and forth to adjust the coating thickness of the adhesive.

Above the gap 13, three strips 3 made of a metal foil having a thickness of 60 μm are provided at both ends of the fountain die 1 outside the movable lip 11 and the fixed lip 12 of the fountain die 1 at intervals. It is installed by fixing it to the side wall with bolts 5, and partially closes the lip gap 13 in the width direction.

Reference numeral 6 is a movable lip fixing bolt, and 7 is a movable lip height adjusting bolt.

The number, width and spacing of the strips 2 are determined by the widths of the non-adhesive portion and the adhesive portion.

According to the partial coating method of the pressure-sensitive adhesive of the present invention, the strip 1 is provided between the lips 11 and 12 to form the lip 1
The gaps 13 of 1 and 12 are partially closed in the width direction, and the pressure-sensitive adhesive extruded from the non-closed gaps 13 is applied to the support A in a striped pattern.

[0021]

EFFECT OF THE INVENTION Since the partial coating device for the adhesive of the present invention is constructed as described above, loosen the lip fixing bolt,
You can change the width and spacing of non-coated parts without re-tightening. Since the method for partially coating the pressure-sensitive adhesive of the present invention is configured as described above, the number of working steps is small and does not affect the coating accuracy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of an adhesive partial coating apparatus of the present invention.

FIG. 2 is a perspective view of a fountain die.

[Explanation of symbols]

 1 Fountain die 2 Backup roll 3 Band 11 Movable lip 12 Fixed lip 13 Gap A Support

Claims (2)

[Claims] 1. An adhesive comprising a backup roll and a fountain die, wherein a band-shaped body is provided between the lips of the fountain die, and the gap between the lips is partially closed in the width direction by the band-shaped body. Partial coating device for chemicals. 2. The adhesive is discharged from a gap of the opened lip of a fountain die, which is formed by partially closing the gap of the lip in the width direction, by applying a band-shaped body between the lips to apply the adhesive. A partial coating method for an adhesive, which is characterized in that