KR20090057011A - Applying apparatus, and applying method - Google Patents

Abstract

Intended is to homogenize stably the clearance between the tip lip of an applying die and a web. Provided is an applying apparatus for applying an application liquid to a moving web from the tip lip of the applying die fixed on a bed. The applying apparatus is characterized in that a plurality of shims fixed on the bed by bolts are arranged in that joint zone of the jointing face of the bed which is to be jointed to the applying die, so that the straightness of the tip lip of the applying die is adjusted by adjusting the individual thicknesses of the shims arranged.

Description

Application device and application method {APPLYING APPARATUS, AND APPLYING METHOD}

The present invention relates to a coating apparatus and a coating method, and in particular, coating liquids such as photographic photosensitive emulsifiers, magnetic liquids, viewing angle enhancement films, solutions for forming antireflection films, pigment liquids for color filters, solutions for forming surface protective films, and the like. A coating apparatus and a coating method for apply | coating to support bodies, such as a plastic film, paper, and metal foil.

The die coating method is known as a method for apply | coating a coating liquid to the surface of a moving support body (web etc.). In recent years, there has been a demand for a technique for forming a highly precise laminated film in a region of 20 [mu m] or less in thickness, which is thinner than the conventional one, due to high performance of a film formed by a die coating method. In order to form such a thin film uniformly, the precision in application | coating apparatus, especially the clearance of a tip lip and a web becomes very important.

This clearance is strongly influenced not only in the environmental temperature but also in the manufacture of the coating apparatus, and finally needs to be fine-adjusted from the point that it needs to be uniform over the entire web width to be applied. Patent Literature 1 and Patent Literature 2 connect a mount fixing the coating die and the coating die with a plurality of push bolts and pull bolts, and adjust the push bolts and pull bolts to adjust the tip lip and the web. A method of adjusting clearance is disclosed.

Patent Document 1: Japanese Patent Application Laid-Open No. 6-142588

Patent Document 2: Japanese Patent Publication No. 2005-270877

However, in the inventions disclosed in Patent Documents 1 and 2, the clearance of the tip lip and the web can be adjusted. It is difficult to adjust to the position, and the adjustment by the bolt is repeated until an accidental success is achieved because of lack of reproducibility of the adjustment. In addition, in the adjustment by the bolt, the bolt is released and the clearance is changed while applying the vibration of the rotating body or the like in the coating device, so that the coating liquid cannot be applied uniformly, or the web is broken. There are many practical problems such as problems.

This invention is made | formed in view of the said situation, and it is providing the coating apparatus and application method which can perform the position adjustment of clearance easily, and are small in the change of clearance in an application | coating process.

1st Embodiment of this invention is a coating apparatus which apply | coats a coating liquid from the front end lip of the coating die fixed to the mount on the web which is moving, WHEREIN: The said application | coating die is attached to the joining area of the joining surface of the mount joined with the said application die | dye. Straightness in the tip lip of the coating die by arranging a plurality of shims having holes or cutouts for penetrating the bolts for engaging the mount, and adjusting the thickness of each of the placed shims. It is an application apparatus characterized by adjusting the.

According to a second embodiment of the present invention, the bonding region is convex in the direction of the coating die in the bonding surface of the mount.

3rd Embodiment of this invention is a coating apparatus as described in 1st Embodiment or 2nd Embodiment whose width | variety in the direction perpendicular | vertical to the moving direction of a web is 1.2 times-7 times the said bolt diameter. .

In the fourth embodiment of the present invention, four or more shims are disposed on the joining surface of the mount, and the sum of the widths in the direction perpendicular to the web moving direction of the shim used is the web moving direction of the joining surface of the mount. It is less than half of the sum total of the width direction in the direction orthogonal to the said, It is the coating device in any one of 1st embodiment-3rd embodiment characterized by the above-mentioned.

In the fifth embodiment of the present invention, the mount has a plurality of pillars formed in a direction from the coating die toward the holder for fixing the mount, and all the joining regions are formed in an area that is above the end of the pillar. It is the coating device in any one of 1st embodiment-4th embodiment characterized by the above-mentioned.

In 6th Embodiment of this invention, all the surfaces in the area | region used as the other end of the said column, or all the surfaces except the both ends are in close contact with the said holding table, The 1st Embodiment-5th Embodiment characterized by the above-mentioned. It is the coating device in any one of Claims.

7th Embodiment of this invention is a coating device in any one of 1st Embodiment-6th Embodiment characterized by the said core being comprised by SUS steel.

8th Embodiment of this invention is 1st Embodiment-7th Embodiment on the said web which is moved by rotation of the said backup roller by rotating the backup roller which wound the web arrange | positioned near the front-end lip of the said application | coating die. It is a coating method characterized by supplying a coating liquid from the tip lip of the coating device in any one of forms.

(Effects of the Invention)

As mentioned above, according to the coating apparatus and coating method in this invention, adjustment of clearance can be performed easily, and since the change of clearance in a coating process is few, it can apply | coat a coating liquid stably and uniformly on a web. have.

1 is a cross-sectional view in a direction perpendicular to the web of the application apparatus according to the embodiment of the present invention.

2 is a perspective view of the coating apparatus according to the embodiment of the present invention.

3 is a cross-sectional view in a direction parallel to the application apparatus web according to the embodiment of the present invention.

4 is an enlarged cross-sectional view of a direction parallel to the web of the coating apparatus according to the embodiment of the present invention.

It is sectional drawing of the direction parallel to the web of the coating apparatus which concerns on other embodiment of this invention.

6 is a table showing test results of Examples and Comparative Examples of the present invention.

(Explanation of symbols for the main parts of the drawing)

11. Trestle 12. Applicator die

12a. Tip lip 13. core

14. Backup roller 15. Web

16. Coating liquid 21. Pillar

22. Bolt 23.. Fixture

25…. Contact surface 26. Incision

[Application device]

Embodiment of the coating device which concerns on this invention is described based on FIG.

1: is sectional drawing cut | disconnected perpendicularly to the web width direction of the coating device in this embodiment, and FIG. 2 is a perspective view of the coating device in this embodiment.

In the coating apparatus in this embodiment, the web 15 which runs continuously to the backup roller 14 is wound up, the coating die 12 is arrange | positioned near this backup roller 14, and the coating die 12 is carried out. From this, the coating liquid 16 is applied on the web 15.

The coating die 12 is joined to the mount 11 directly or through a shim 13 formed of SUS steel. In the center of the shim 13, a hole or a cutout for fixing the coating die 12 to the mount 11 is formed, and a screw hole for fixing the mount 11 is formed in the application die 12. The application die 12 is fixed to the mount 11 by bolts 22 through this hole or cutout. In addition, the mount 11 is fixed to the fixing table 23. In addition, although the shim 13 which consists of SUS steel was used in this embodiment, if it is a material with little change with time, and it is a material with high rigidity, it will not specifically limit.

In order to apply | coat the coating liquid 16 uniformly to the web 15, as mentioned above, it is preferable that the space | interval of the front lip 12a of the backup roller 14 and the coating die 12, ie, clearance, is uniform. For this reason, the tip of the tip lip 12a of the coating die 12 is inserted by inserting the some shim 13 between the mount 11 and the coating die 12, and changing the thickness of the shim 13 inserted, respectively. Straightness is adjusted so that the space | interval of the backup roller 14 and the tip lip 12a of the coating die 12 may be made uniform. Specifically, it demonstrates based on FIG. 3, FIG. 3 is a cross-sectional view taken in parallel in the web width direction of the coating apparatus in the present embodiment, and FIG. 4 is an enlarged view thereof. As shown in FIG. 3, the coating die 12 and the mount 11 are joined via a plurality of shims 13. In order to adjust the straightness of the tip lip 12a of the application | coating die 12, it adjusts by inserting the thing of which the film thickness of each shim 13 differs. The position where each shim 13 is provided is a position corresponding to the end surface of the application die 12 side of the pillar 21 for securing the strength formed in the mount 11. Specifically, in the application die 12 side end surface of the pillar 21 for securing the strength of the mount 11 formed between the holder 23 for fixing the mount 11 and the application die 12, The convex surface for improving the reproducibility of a contact is formed only in the edge area | region of the pillar 21, and it is the structure which fixed the coating die 12 to the mount 11 through the shim 13 in this area | region. Since the application die 12 is fixed on the end of the mount 11 pillar 21, the mount 11 is not deformed due to the weight of the application die 12 or the like, and the tip lip of the application die 12 is fixed. The straightness of (12a) can be raised stably.

On the other hand, as shown in FIG. 3, since the other end surface of the pole 11 of the mount 11 is in contact with the surface of the fixing stand 23 except the pillar 21 of both ends, it is the contact surface 25, and it apply | coats The force exerted by the weight of the die 12 is all applied to the surface of the holder 23 through the pillar 21 of the mount 11. Therefore, the deformation of the mount 11 due to the weight of the application die 12 is very small, and the straightness of the tip lip 12a of the application die 12 is changed by constructing a material which does not deform the holder 23. There is no work. In this embodiment, in order to prevent the movement by a vibration etc., the mount 11 and the fixing stand 23 are being fixed by four bolts. In addition, all the surfaces of the other end surface of the pillar 11 and the column 21 may be brought into contact with the surface by the fixing table 23.

With the above structure, once the adjustment by the shim 13 is performed, it is possible to use it as it is for a long time.

According to the inventors' results, the width (width in the web width direction) of the coating die 12 of the mount 11 and the pillar 21 is 1.4 times or more of the bolt nominal diameter, and 20 [mm] or more and 100 [ Mm] or less. It is because the width | variety of 1.4 times or more of the bolt nominal diameter, and the width | variety of 20 [mm] or more is necessary in order for the mount 11 not to deform | transform. In addition, when the whole mount 11 is formed in the bulk shape without forming the pillar 21 in the mount 11, the weight of the mount 11 becomes very heavy, and becomes difficult at the time of carrying out movement, fine adjustment, etc. In addition, since it may deform | transform by the own weight of the mount 11 itself, it is hard to say that it is suitable as a structure. Therefore, it is preferable that the width of a pillar is 100 [mm] or less.

Further, the shim 13 is disposed on the application die 12 side end surface of the pillar 21 to adjust the straightness of the tip lip 12a of the application die 12. More than four numbers are needed. This is because subtle adjustment of the straightness of the tip lip 12a by the shim cannot be performed when the number of shims is three or less.

In addition, although the cutout part 26 is normally formed in the mount 11, since the pillar 21 of the mount 11 is supported by the structure which penetrates from the application | coating die 12 to the fixture 23, the pillar 21 The structure formed in the surface other than the contact surface 25 of the tip is preferable. In addition, there is also a structure of the mount 11 in which such a cutout 26 is not formed. In this case, the fixing table 23 and the mount 11 form the contact surface 25 in a wide area.

[Application method]

Next, the coating method which concerns on this invention is demonstrated based on FIG. The coating method according to the present invention uses the coating apparatus according to the present invention described above. Specifically, the coating liquid 16 supplied to the coating die 12 is supplied to the tip lip 12a of the coating die 12 through the slit formed in the coating die 12. The tip lip 12a of the coating die 12 is arranged with a predetermined clearance in proximity to the web 15 continuously running by the backup roller 14, and the coating liquid 16 of the coating die 12 It is applied to the web 15 while forming a kind of bead between the tip lip 12a and the web 15. It is preferable that the clearance at the time of application | coating is 3 [micrometer] or less over the whole width of the web 15, and the straightness of the tip lip 12a of the coating die 12 by the shim 13 is suppressed in this range. It is adjusted.

In addition, the viscosity of the coating liquid 16 to be applied is preferably in the range of 0.1 to 1000 [p] (0.01 to 100 [Pa · s]), and more preferably 1 to 100 [p] (0.1 to 10 [Pa]. S]) is preferred.

The web 15 to which the coating liquid 16 has been applied is once wound in a roll shape after being subjected to drying treatment and calender treatment, and cured by heating or UV irradiation while remaining in a roll shape. The hardened web 15 is cut long and thin to a predetermined width to be a product such as a photosensitive material, a magnetic recording medium, a PS plate, an optical functional film, or the like.

Moreover, a liquid crystal, a magnetic material, a photosensitive agent, an organic EL, a pigment material, an adhesive material, an electroconductive material, an insulating material, etc. can be apply | coated by the coating apparatus and the coating method which concern on this invention.

As mentioned above, although the coating apparatus and coating method which concern on this invention were demonstrated in detail, this invention is not limited to the above example, It is possible to perform various improvement and deformation in the range which does not deviate from the summary of this invention.

(Example)

Next, the test results for the Examples and Comparative Examples of the present invention will be described.

(1) The conditions of the coating die and the mount of the Example were as follows.

(Coating die)

As a coating die, a die having a total length of 1400 mm and an effective coating width of 1250 mm was used.

(trestle)

A mount having a total length of 1200 mm was used as a mount, and a mount in which the nominal diameter and number of check bolts, the number and number of pillars were changed, and a coating die was mounted to measure the straightness of the lip tip.

(2) On the other hand, the conditions of the coating die and the mount of a comparative example were as follows.

(Coating die)

In the same manner as in Example, a die having a total length of 1400 mm and an effective coating width of 1250 mm was used.

(trestle)

As a mount, the mount similar to the Example was created. However, the fixation and the straightness adjustment of the coating die were made by using a push-pull bolt without using a shim.

(3) The measurement of straightness was performed as follows.

[Measurement of Straightness]

Straightness was symmetrically applied to the back-up roll, and the gap between the die lip tip and the back-up roll was measured by a thickness gauge, and the gap was determined by the maximum value-minimum value.

[Linearity]

The ratio of the amount of movement of the lip tip to the adjustment amount of the shim or push-pull bolt was defined as linearity. For example, when the thicknesses of the seams A and B are tA, tB, and the movement amount with respect to the initial value of the lip tip at that time is dA and dB, linearity = (dB-dA) / (tB-tA) x 100 ( %)

[Test result]

The test result of the said Example and a comparative example is shown in FIG. In the evaluation, both the linearity and the straightness were good, and the case where either the linearity or the straightness was good was △ ○ or ○, and both were bad.

As can be seen from FIG. 6, Examples 1 to 6 of the present invention, in which the straightness is adjusted by the shim, have a linearity of 65% or more, a distance between the die lip tip and the backup roll, up to 5.2 µm, and a good linearity and Straightness could be obtained. Among Examples 1 to 6, the width in the direction perpendicular to the moving direction of the shim web is 1.2 to 7 times the bolt diameter ("magnification" in Fig. 6), and the condition that the number of pillars in the mount is four or more. Satisfying Examples 1, 3, and 5 were good results with?.

On the other hand, in the comparative example in which the straightness was adjusted by the push bolt, the linearity was 55%, smaller than Example 6, the distance between the die lip tip and the backup roll was 12.0 µm, and both linearity and straightness were bad results.

Claims (8)

In the coating device for applying the coating liquid from the leading lip of the coating die fixed to the mount on the moving web: A plurality of shims having holes or cutouts for penetrating the bolts for joining the application die and the mount to a joining region of the joining surface of the mount joined with the application die; The straightness in the tip lip of the said coating die is adjusted by adjusting the thickness of each arrange | positioned shim, The coating apparatus characterized by the above-mentioned. The coating device according to claim 1, wherein the bonding region is convex in the direction of the coating die on the bonding surface of the mount. The coating device according to claim 1 or 2, wherein the shim has a width in a direction perpendicular to the moving direction of the web of 1.2 to 7 times the diameter of the bolt. The summation of the width | variety in the direction perpendicular | vertical to the web moving direction of the shim used is four or more seams arrange | positioned at the joining surface of the said mount, The summation of the mount according to any one of Claims 1-3. It is less than half of the sum total of the width direction in the direction orthogonal to the web moving direction of a bonding surface, The coating apparatus characterized by the above-mentioned. The said mount has a some pillar formed in the direction from the said application die toward the fixing stand which fixes the said mount, The said joining area | region is all the said of the said pillar. It is formed in the area | region used on the tip, The coating apparatus characterized by the above-mentioned. The coating device according to any one of claims 1 to 5, wherein all of the surfaces in the region serving as the other end of the pillar or all the surfaces except the both ends are in close contact with the fixing table. The coating device according to any one of claims 1 to 6, wherein the shim is made of SUS steel. Rotating a backup roller winding a web disposed proximate to the tip lip of the application die; A coating liquid is supplied from the tip lip of the coating device according to any one of claims 1 to 7 on the web that is moved by the rotation of the backup roller.

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