WO2019225648A1 - Method for forming coating film - Google Patents
Method for forming coating film Download PDFInfo
- Publication number
- WO2019225648A1 WO2019225648A1 PCT/JP2019/020272 JP2019020272W WO2019225648A1 WO 2019225648 A1 WO2019225648 A1 WO 2019225648A1 JP 2019020272 W JP2019020272 W JP 2019020272W WO 2019225648 A1 WO2019225648 A1 WO 2019225648A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coating
- coating liquid
- coated
- discharge port
- coating film
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
Definitions
- the present invention relates to a coating film forming method.
- a die coater that coats a coating liquid onto an object to be coated such as a substrate is used as one of coating apparatuses.
- the coating apparatus 50 that is a die coater discharges the coating liquid 23 from the discharge port 53aa to the workpiece 21 that moves relatively while being supported by the support portion 65.
- a die as a coating part 53 to be coated is provided.
- the coating device 50 is applied to the coating object 21 by the coating unit 53 while moving the coating object 21, and the coating liquid 23 applied to the coating object 21 is solidified and applied.
- a construction film 25 is formed.
- the coating unit 53 includes an upstream die block 55 and a downstream die block 57 that are arranged to face each other so as to form a slot 58, and a leading edge of the slot 58 serves as a discharge port 53 aa. Yes.
- the distance (gap) G between the workpiece 21 and the discharge port 53aa is the thickness of the coated coating solution 23, that is, the thickness of the coating film 25 before solidification ( Wet thickness) is set to about twice or less of T.
- the gap G is set to 2.5 times or more the wet thickness T of the coating film, and the coating liquid is discharged straight from the discharge port along the direction perpendicular to the object to be coated.
- a coating apparatus configured to cause a coating liquid to collide with an object to be coated by spraying in such a manner (see Patent Document 1).
- the exit interval (slot width) of the slit (slot) is as narrow as 0.1 mm or less. For this reason, when applying the coating liquid to the coating object, due to this narrowness, the variation in the processing accuracy of the slot in the width direction of the coating object is large in the variation of the wet thickness of the coating liquid. As a result, a coating film having coating unevenness may be obtained. Such a coating film has a reduced quality.
- an object of the present invention is to provide a coating film forming method capable of obtaining a coating film in which deterioration in quality due to coating unevenness is suppressed.
- the coating film forming method according to the present invention is: An object to be coated that has a discharge port for discharging the coating liquid and moves relative to the discharge port.
- the coating liquid having a predetermined elongation when the coating liquid is discharged from the discharge port to the coated object, a bulging portion that swells on the discharge port side, and Forming the bead having an extended portion extending downstream in the moving direction of the coated object so as to taper from the bulging portion to the coated object, and the discharge port and the coated object; Applying the coating liquid to the object to be coated while maintaining the state of tying, and According to the size of the bulging portion, the gap between the discharge port and the coating object is adjusted so that the bulging portion does not contact the coating object. It is a method of applying the coating liquid.
- the bulging portion is a portion that swells more than a portion (extended portion) on the side of the object to be coated on the discharge port side, and is coated so as not to come into direct contact with the object to be coated. It means a part where a gap is formed between the workpiece.
- the degree of elongation means that the coating liquid is discharged at a speed of 5 g / min from a opening of a cylindrical member having an inner diameter of 2 mm to a roll rotating at a rotational speed of 30 m / min at a position 1 mm away from the opening.
- the predetermined extension may be 2 mm or more.
- a gap between the object to be coated and the discharge port may be set to 0.5 to 2 mm.
- the interval between the discharge ports may be 0.05 to 1.5 mm.
- the schematic side view which shows the coating apparatus used for the coating film formation method of one Embodiment of this invention 1 is a schematic side view showing the periphery of the gap in FIG. 1 together with a schematic state in which the coating liquid is discharged.
- Schematic side view showing an apparatus for measuring the elongation of a coating solution In Experimental example 1, the photograph which shows an example of the state in which the bulging part and extension part of the coating liquid are formed In Experimental example 1, the schematic side view which shows typically an example of the state in which the bulging part and extension part of a coating liquid are not formed In Experimental example 1, the schematic side view which shows typically an example of the state in which the bulging part and extension part of a coating liquid are not formed In Experimental Example 1, a photograph showing an example of a state where the bulging portion and the extending portion of the coating liquid are not formed Schematic side view showing the periphery of the gap of a conventional coating apparatus together with a schematic state in which the coating liquid is discharged
- the coating apparatus 1 used in the coating film forming method of the present embodiment is The coating liquid 23 is discharged from the discharge port 3aa to the coating object 21 having a discharge port 3aa for discharging the coating liquid 23 and moving relative to the discharge port 3aa. It has a coating part 3 to work on,
- the coating unit 3 is configured to solidify the coating solution 23 applied to the workpiece 21 to form a coating film 25.
- the coating apparatus 1 when the coating liquid 23 having a predetermined elongation degree is discharged from the discharge port 3aa to the workpiece 21, the coating liquid 23 swells on the discharge port 3aa side.
- 23b is formed so as to maintain a state of connecting the discharge port 3aa and the workpiece 21 while forming a bead having 23b.
- the coating apparatus 1 is arranged between the discharge port 3aa and the workpiece 21 so that the bulging portion 23a does not contact the workpiece 21 according to the size of the bulging portion 23a.
- the gap G is configured to be adjusted.
- the coating apparatus 1 further includes a solidifying unit 13 that solidifies the coating liquid 23 applied by the coating unit 3 to form a coating film 25.
- the coating apparatus 1 further includes a support portion 15 that moves relative to the coating portion 3 in the longitudinal direction of the workpiece 21 while supporting the workpiece 21 on the surface.
- belt-shaped thing as shown in FIG. 1 is mentioned,
- seat member etc. are mentioned.
- An example of such a sheet member is a resin film.
- a resin film the following resin films etc. are mentioned, for example. That is, the resin film is not particularly limited, and can be appropriately selected depending on the application.
- polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulose polymers such as diacetyl cellulose and triacetyl cellulose, polycarbonate polymers, acrylic polymers such as polymethyl methacrylate, polystyrene Styrene polymer such as acrylonitrile-styrene copolymer, polyethylene, polypropylene, polyolefin having cyclic or norbornene structure, olefin polymer such as ethylene-propylene copolymer, vinyl chloride polymer, amide such as nylon and aromatic polyamide
- a film made of a transparent polymer such as a base polymer can be suitably used.
- resin films used for optical applications include imide polymers, sulfone polymers, polyether sulfone polymers, polyether ether ketone polymers, polyphenylene sulfide polymers, vinyl alcohol polymers, vinylidene chloride polymers, vinyl butyral.
- a film made of a transparent polymer such as a polymer, an arylate polymer, a polyoxymethylene polymer, an epoxy polymer or a blend of the above-mentioned polymers can also be exemplified.
- the workpiece 21 will be described later.
- the support portion 15 supports the workpiece 21 that moves in the longitudinal direction from the opposite side of the coating portion 3.
- the coating liquid 23 is applied to the workpiece 21 that is supported by the support portion 15 and moves relative to the coating portion 3.
- Examples of the support portion 15 include a roll.
- the support portion 15 is configured so that the workpiece 21 is relatively moved from one side (upper side in FIG. 1) to the other side with respect to the discharge port 3aa at a position facing the discharge port 3aa of the coating unit 3. (Below FIG. 1).
- the solidifying unit 13 is configured to form the coating film 25 by solidifying the coating liquid 23.
- the coating film 25 is formed by being solidified by the solidified portion 13.
- the solidification part 13 should just be what can solidify the coating liquid 23, and is not specifically limited.
- the solidifying part 13 is appropriately set according to the type of the coating liquid 23 and the like.
- a die having a slot 8 is employed as the coating unit 3.
- the coating apparatus 1 provided with a die in this way is called a die coater.
- the coating unit 3 discharges the coating liquid 23 from the discharge port 3aa of the slot 8 to apply the coating liquid 23 onto the workpiece 21 that is relatively moving.
- the coating unit 3 is disposed so that the discharge port 3aa of the slot 8 faces sideward (horizontal direction), and is applied to the workpiece 21 that is moving up and down relative to the discharge port 3aa.
- the coating liquid 23 is discharged.
- the coating liquid 3 is supplied to the coating part 3 from a container (not shown) for the coating liquid 23 via a pipe (not shown) and a pump (not shown).
- the coating unit 3 includes an upstream die block 5 and a downstream die block 7 arranged to face the upstream die block 5.
- the coating part 3 is formed by bringing the upstream die block 5 and the downstream die block 7 together.
- the manifold 9 in which the coating liquid 23 supplied by a pump (not shown) is stored and the manifold 9 toward the leading edge are provided between them.
- a slot 8 is formed. Further, a gap between the upstream lip portion 5 a that is the leading edge of the upstream die block 5 and the downstream lip portion 7 a that is the leading edge of the downstream die block 7 becomes the discharge port 3 aa of the slot 8. ing.
- the upstream lip portion 5 a and the downstream lip portion 7 a are disposed so as to be positioned on a plane perpendicular to the radial direction R of the support portion 15.
- the slot 8 is arranged in parallel with the radial direction R of the support portion 15.
- the interval between the discharge ports 3aa that is, the length (slot width) in the moving direction M of the workpiece 21 is not particularly limited and can be set as appropriate. For example, if the slot width is too small, the variation in the processing accuracy of the slot 8 will have an adverse effect on the variation in the wet thickness of the coating film 25, and the variation may be unacceptable.
- the slot width is preferably 0.05 to 1.5 mm, more preferably 0.1 to 1.5 mm, and further preferably 0.3 to 1.2 mm.
- the coating condition range does not change. This is also preferable.
- the length of the downstream lip portion 7a is preferably 0.1 mm or more and 4 mm or less.
- the gap G is preferably 2.5 to 20 times, and more preferably 3 to 15 times the thickness of the coated coating solution 23 before solidification (wet thickness of the coating film 25).
- the gap G is preferably 0.5 to 2 mm, and more preferably 0.5 to 1.5 mm.
- FIG. 1 shows a mode in which the coating unit 3 continuously applies the coating liquid 23 to the strip-shaped coated object 21 that moves relatively.
- the aspect of applying the coating liquid 23 is not limited to the aspect of FIG. FIG. 1 shows a mode in which the workpiece 21 moves clockwise, but the moving direction of the workpiece 21 is not particularly limited.
- the coating film forming method of the present embodiment has a discharge port 3aa for discharging the coating liquid 23, and the discharge port 3aa is applied to an object to be coated 21 that moves relative to the discharge port 3aa.
- the coating liquid 23 is applied to the workpiece 21 to form a coating film by using the coating apparatus 1 that discharges the coating liquid 23 to apply the coating liquid 23.
- the coating liquid 23 having a predetermined elongation is used. That is, a material capable of forming a bead having the following shape is used.
- a bulging portion 23a that swells on the discharge port 3aa side while forming a bead having an extended portion 23b extending obliquely toward the downstream side in the moving direction M of the workpiece 21 so as to taper from the protruding portion 23a to the workpiece 21,
- the coating liquid 23 is applied to the coating object 21 while maintaining a state where the discharge port 3aa and the coating object 21 are connected.
- the discharge port 3aa and the article to be coated are arranged so that the bulging part 23a does not contact the article to be coated 21 according to the size of the bulging part 23a.
- the coating liquid 23 is applied to the workpiece 21 by adjusting the gap G between the coating liquid 21 and the workpiece 21.
- the coating film forming method of this embodiment is: Coating of the coating apparatus 1 using the coating liquid 23 having the above-described elongation and adjusting the gap G so that the bulging portion 23a does not contact the workpiece 21 according to the size of the bulging portion 23a.
- the coating liquid 23 that connects the discharge port 3aa and the article to be coated 21 is the above-described bulging portion 23a and extending portion 23b.
- the coating liquid 23 from the discharge port 3 aa is formed so that a bead having a thickness is formed and the bulging portion 23 a is not in contact with the workpiece 21.
- the discharge amount, the moving speed of the workpiece 21 and the arrangement of the coating unit 3 with respect to the workpiece 21 are set.
- the coating liquid 23 having the above-described elongation is used, and a gap is provided so that the bulging portion 23 a does not contact the workpiece 21 according to the size of the bulging portion 23 a. Adjust G. Then, under the set conditions, the coating liquid 23 is discharged from the discharge port 3aa of the coating unit 3 to the object to be coated 21 for coating. Next, the coating liquid 23 applied on the workpiece 21 is solidified by the solidifying unit 13 to obtain a coating film 25.
- the shape of the bulging portion 23 a and the extending portion 23 b of the coating liquid 23 is different from the discharge port 3 aa according to the type of the coating liquid 23, the wet thickness T of the coating film 25, and the moving speed of the workpiece 21. It is determined by adjusting the gap G with the workpiece 21.
- the coating liquid 23 contains a solidifying component, and is applied to the object 21 to be solidified on the object 21.
- the kind of the coating liquid 23 is a predetermined degree of elongation such that the coating liquid 23 that connects the discharge port 3aa and the workpiece 21 has a shape having the bulging portion 23a and the extending portion 23b. Can be set as appropriate.
- the extension degree is rotated at a rotational speed of 30 m / min at a position 1 mm away from the opening of a cylindrical member (cylindrical member for measuring the extension degree) having an inner diameter of 2 mm.
- the coating liquid 23 is discharged at a speed of 5 g / min to a roll (a roll for measuring the degree of elongation) and the distance between the opening of the cylindrical member and the roll (measurement gap D) is increased from 1 mm
- the temperature of the coating solution 23 is set to 23 ⁇ 2 ° C.
- the elongation degree of the coating liquid 23 is preferably 2 mm or more, and more preferably 5 mm or more, in that it tends to have a shape having the bulging portion 23 a and the extending portion 23 b.
- the coating liquid 23 When the elongation degree of the coating liquid 23 is 2 mm or more, the coating liquid 23 is sufficiently easily stretched. Therefore, it is easy to form the bulging portion 23a so as not to come into contact with the article 21 to be coated. It becomes easy to form the extending part 23b without. Thus, formation of the bulging part 23a and the extension part 23b becomes easy. Therefore, it is possible to more reliably obtain the coating film 25 in which the deterioration in quality due to the coating unevenness is suppressed.
- the upper limit of the degree of elongation is not particularly limited, and can be set as appropriate.
- the degree of elongation of the coating liquid 23 is preferably 100 mm or less, and more preferably 50 mm or less.
- Examples of the coating solution 23 include a polymer solution, and examples of the material used as the solidifying component include a thermosetting material, an ultraviolet curable material, and an electron beam curable material.
- the coating liquid 23 include an adhesive.
- an acrylic polymer is preferable as the coating liquid 23, for example, an acrylic polymer is preferable. By using this, there is an advantage that a polarizing plate can be produced.
- the viscosity of the coating liquid 23 is preferably 0.1 Pa ⁇ s or more and 100 Pa ⁇ s or less, more preferably 0.5 Pa ⁇ s or more and 20 Pa ⁇ s or less, and further preferably 1 Pa ⁇ s or more and 20 Pa ⁇ s or less. It is. Such a viscosity is a value measured by a measuring method described in Examples described later.
- the viscosity of the coating liquid 23 is 0.1 Pa ⁇ s or more, there is an advantage that the coating film is hardly affected by drying.
- the viscosity of the coating liquid 23 is 100 Pa ⁇ s or less, there is an advantage that a known pump can be used widely and the handling property of the coating liquid is excellent.
- the density of the coating liquid 23 is preferably 700 ⁇ 1500kg / m 3, more preferably 800 ⁇ 1400kg / m 3, more preferably 800 ⁇ 1000kg / m 3. Such a density is a value measured by a measuring method described in Examples described later.
- the thickness (the wet thickness of the coating film 25) T of the coated coating solution 23 is not particularly limited, and can be set as appropriate.
- the thickness T is adjusted, for example, by adjusting at least one of the discharge amount of the coating liquid 23 from the coating unit 3 and the moving speed of the workpiece 21 according to the viscosity of the coating liquid 23. obtain.
- the thickness T of the coated coating solution 23 is preferably 1 ⁇ m or more and 500 ⁇ m or less, and more preferably 10 ⁇ m or more and 300 ⁇ m or less.
- the thickness T is a value measured by the measurement method described in the examples described later.
- the discharge amount (flux) of the coating liquid 23 from the discharge port 3aa of the coating unit 3 can be, for example, 8.3 ⁇ 10 ⁇ 8 to 2.5 ⁇ 10 ⁇ 3 m 2 / s.
- the discharge amount of the coating liquid 23 from the discharge port 3aa can be adjusted, for example, by adjusting the supply speed of the coating liquid supplied to the coating unit 3 by the pump (not shown).
- the thickness of the object to be coated 21 is not particularly limited, but is preferably 5 to 500 ⁇ m, for example.
- FIG. 1 shows an aspect in which the article to be coated 21 is a long and flexible object, other aspects in which the article to be coated 21 is a single plate or inflexibility are shown. An aspect can also be employ
- the moving speed of the workpiece 21 can be adjusted, for example, by adjusting the rotational speed of the support portion 15.
- a moving speed is preferably 5 to 300 m / min, more preferably 10 to 100 m / min, still more preferably 10 to 50 m / min.
- the moving speed of the workpiece 21 is 5 m / min or more, there is an advantage that the drive system is stabilized.
- the moving speed of the object to be coated 21 is 300 m / min or less, it is difficult for air to enter between the object to be coated 21 and the coating liquid 23. There is an advantage that meandering due to air entrainment between them can be suppressed.
- the coating liquid 23 has a viscosity of 1 to 20 Pa ⁇ s, a density of 800 to 1000 kg / m 3 , and an object to be coated 21. It is more preferable that the moving speed is 5 to 50 m / min.
- the gap G between the object to be coated 21 and the discharge port 3aa may be set as appropriate so that the bulging portion 23a does not contact the object to be coated 21, and is not particularly limited. 0.5 to 2 mm is preferable, and 0.5 to 1.5 mm is more preferable.
- Patent Document 1 unlike the coating apparatus of FIG. 8, the coating liquid is ejected straight and in a film form. For this reason, when applying the coating liquid to the object to be coated, the variation in the processing accuracy of the slot in the width direction of the object to be coated has a great influence on the variation in the wet thickness of the coating liquid. There is a possibility that a coating film having unevenness of work may be obtained.
- the inventors of the present invention have further studied earnestly by paying attention to the appearance shape of the coating liquid existing from the discharge port to the object to be coated.
- the coating liquid (bead) connecting the discharge port and the object to be coated swells on the discharge port side, and the swelled portion.
- the object can be coated without causing uneven coating.
- a coating liquid can be applied to a workpiece.
- such a shape uses a coating liquid having a degree of elongation such that the bulging part and the extending part are formed, and the interval between the discharge port and the object to be coated is set according to the coating liquid. It has been found that it can be realized by adjusting.
- the bulging portion is not formed.
- the gap is larger than the proximity coating, if the size is not sufficient, for example, as shown in FIG.
- the variation in wet thickness increases both in the direction of movement of the article to be coated and in the direction perpendicular to the movement direction (width direction), which may cause uneven coating.
- the gap becomes too large, as shown in FIGS. 6 and 7, the extended portion is interrupted (the discharge port and the object to be coated are not connected by the coating liquid), and the coating becomes impossible. Even if it can be applied, streaky coating unevenness may occur.
- the shape of the coating liquid in the gap is the specific shape, it has been found that it is possible to obtain a coating film in which deterioration in quality due to coating unevenness is suppressed. It came to complete the coating film formation method of embodiment.
- the coating film forming method of this embodiment is The coating liquid 23 is discharged from the discharge port 3aa to the coating object 21 having a discharge port 3aa for discharging the coating liquid 23 and moving relative to the discharge port 3aa.
- the coating liquid 23 is applied to the workpiece 21.
- the gap G is larger than that of the conventional proximity coating as shown in FIG. 8, so that it is possible to suppress the occurrence of coating unevenness due to the gap G being too small.
- the gap G is larger than that of the proximity coating, if the size is not sufficient, the swelled portion (swelled portion) 23a of the coating liquid 23 may come into contact with the workpiece 21.
- the gap G by adjusting the gap G as described above, it is possible to suppress the occurrence of coating unevenness due to the variation in the wet thickness of the coating film 25 caused by this contact. Furthermore, it is possible to suppress the occurrence of coating unevenness caused by the coating liquid 23 being interrupted, which is generated when the gap G is too large.
- the predetermined elongation is 2 mm or more.
- the coating liquid 23 can be sufficiently stretched, so that it is easy to form the bulging portion 23 a so as not to contact the workpiece 21, and it is interrupted. It becomes easy to form the extending part 23b without. Therefore, it is possible to more reliably obtain the coating film 25 in which the deterioration in quality due to the coating unevenness is suppressed.
- the gap G between the coating object 21 and the discharge port 3aa is preferably set to 0.5 to 2 mm.
- the gap G By setting the gap G to 0.5 mm or more, it is possible to further suppress appearance defects, particularly point defects, of the coating film 25.
- the interval (slot width) of the discharge ports 3aa is 0.05 to 1.5 mm.
- the interval between the discharge ports 3aa is too small, the variation in the processing accuracy of the slot 8 may have an adverse effect on the variation in the wet thickness of the coating film 25, and the variation may be unacceptable.
- the interval between the discharge ports 3aa is too large, the internal pressure of the die is lowered, and the coating liquid 23 cannot be uniformly distributed in the width direction inside the die, and there is a possibility that the variation in the wet thickness of the coating film 25 cannot be allowed. .
- the interval between the discharge ports 3aa is 1.5 mm or less, it is possible to more uniformly distribute the coating liquid 23 in the width direction inside the die while suppressing a decrease in the internal pressure of the die. 25 variation in wet thickness can be suppressed. Therefore, it is possible to more reliably obtain the coating film 25 in which the deterioration in quality due to the coating unevenness is suppressed.
- a coating film forming method in which deterioration in quality due to coating unevenness is suppressed is provided.
- the coating film forming method of the present embodiment is as described above, but the present invention is not limited to the above-described embodiment, and can be appropriately modified within the intended scope of the present invention.
- Coating object Polyethylene terephthalate (PET) film (Product name: Diamond wheel, manufactured by Mitsubishi Plastics)
- Coating solution Acrylic polymer solutions A to H (see Table 1), Solvent: Toluene, Ethyl acetate
- the density of the coating solution was measured by using the density measuring function of a Coriolis flow meter (Promass 83F, manufactured by Endless Hauser).
- Example 1 Using the above materials, the coating solution was discharged onto the article to be coated under the conditions described below and in Table 1, and the coating state was examined by the following method. The results are shown in Table 1. Moreover, the result about the coating state in case a gap is 1.0 mm is shown in FIG. 4, the result about the coating state in case a gap is 0.2 mm is shown in FIG. The result about a coating state is shown in FIG.6 and FIG.7.
- the wet thickness of the coating film was measured in-line using a spectral interference thickness meter (Si-T, manufactured by Keyence Corporation).
- the gap was 0.2 mm, it was in the state of proximity coating, and appearance defects (point defects) occurred.
- the coating liquid that connects the discharge port and the object to be coated has a bulging portion and an extending portion, but the bulging Such a portion contacted the object to be coated, and no bulging portion was formed.
- the coating liquid applied to the object to be coated was solidified, and then the object to be wound was wound. Occurred and could not be wound well. As a result, it was found that when the gap was 2.5 mm or more, an appearance defect with a high height occurred and a winding failure could occur.
- Example 2 Using the acrylic polymer solutions D and G of Experimental Example 1 (see Table 1) and changing the slot width to 0.3 mm and 1.2 mm, the coating liquid was applied to the object to be coated in the same manner as Experimental Example 1. The coating state was evaluated. The results are shown in Table 2. In Table 2, in the acrylic polymer solutions D and G, the result in the case of the slot width of 0.6 mm is the result of the experiment example 1.
- PET Polyethylene terephthalate
- Coating liquid (1) acrylic polymer solution, solvent: toluene, ethyl acetate Polymer average weight molecular weight: about 800,000 Polymer concentration: 2.6 wt% (Coating conditions)
- Coating width 150mm Distance (gap) between workpiece and discharge port: 0.5mm
Abstract
In a method for forming a coating film, in which a coating device is used to form a coating film by coating a coating liquid onto an object being coated, a liquid having a prescribed degree of elongation is used as the coating liquid, and a gap between a discharge port and the object being coated is adjusted in such a way that a bulging part of a bead does not come into contact with the object being coated, while said bead including the bulging part and an extended part is being formed.
Description
本願は、日本国特願2018-097673号の優先権を主張し、引用によって本願明細書の記載に組み込まれる。
This application claims the priority of Japanese Patent Application No. 2018-097673, and is incorporated herein by reference.
本発明は、塗工膜形成方法に関する。
The present invention relates to a coating film forming method.
従来、塗工膜形成方法においては、塗工装置の一つとして、例えば、基材等の被塗工物に塗工液を塗工するダイコーターが用いられている。
Conventionally, in a coating film forming method, for example, a die coater that coats a coating liquid onto an object to be coated such as a substrate is used as one of coating apparatuses.
例えば、図8に示すように、ダイコーターである塗工装置50は、支持部65に支持されながら相対的に移動する被塗工物21に、吐出口53aaから塗工液23を吐出して塗工する塗工部53としてのダイを備えている。この塗工装置50は、被塗工物21を移動させながら塗工部53によって被塗工物21に塗工し、被塗工物21に塗工された塗工液23を固化させて塗工膜25を形成するように構成されている。塗工部53は、スロット58を形成するように互いに対向して配された上流側のダイブロック55と下流側のダイブロック57とを有し、スロット58の先端縁が吐出口53aaとされている。
For example, as shown in FIG. 8, the coating apparatus 50 that is a die coater discharges the coating liquid 23 from the discharge port 53aa to the workpiece 21 that moves relatively while being supported by the support portion 65. A die as a coating part 53 to be coated is provided. The coating device 50 is applied to the coating object 21 by the coating unit 53 while moving the coating object 21, and the coating liquid 23 applied to the coating object 21 is solidified and applied. A construction film 25 is formed. The coating unit 53 includes an upstream die block 55 and a downstream die block 57 that are arranged to face each other so as to form a slot 58, and a leading edge of the slot 58 serves as a discharge port 53 aa. Yes.
かかる塗工装置50では、被塗工物21と吐出口53aaとの距離(ギャップ)Gが、塗工された塗工液23の厚み、すなわち、固化される前の塗工膜25の厚み(ウェット厚み)Tの2倍以下程度に設定されている。
In such a coating apparatus 50, the distance (gap) G between the workpiece 21 and the discharge port 53aa is the thickness of the coated coating solution 23, that is, the thickness of the coating film 25 before solidification ( Wet thickness) is set to about twice or less of T.
しかし、このようにギャップGが小さいと、被塗工物21と吐出口53aaとの間にゴミ等の異物が引っかかり、これに起因してスジが発生するといった不具合が発生するおそれがある。このような不具合が発生すると、得られる塗工膜は、品質が低下したものとなる。
However, when the gap G is small as described above, foreign matter such as dust may be caught between the workpiece 21 and the discharge port 53aa, resulting in a problem that streaks are generated. When such a defect occurs, the quality of the obtained coating film is deteriorated.
そこで、上記ギャップGを塗工膜のウェット厚みTの2.5倍以上に設定し、吐出口から塗工液を、被塗工物と垂直な方向に沿って真っすぐに、且つ、膜状となるように噴出することによって、被塗工物に塗工液を衝突させて塗工するように構成された塗工装置が提案されている(特許文献1参照)。
Therefore, the gap G is set to 2.5 times or more the wet thickness T of the coating film, and the coating liquid is discharged straight from the discharge port along the direction perpendicular to the object to be coated. There has been proposed a coating apparatus configured to cause a coating liquid to collide with an object to be coated by spraying in such a manner (see Patent Document 1).
しかし、特許文献1の塗工装置においては、スリット(スロット)の出口間隔(スロット幅)が0.1mm以下と狭い。このため、被塗工物に塗工液を塗工する際、この狭さに起因して、被塗工物の幅方向におけるスロットの加工精度のバラツキが塗工液のウェット厚みのバラツキに大きな影響を及ぼし、その結果、塗工ムラを有する塗工膜が得られるおそれがある。このような塗工膜は、品質が低下したものとなる。
However, in the coating apparatus of Patent Document 1, the exit interval (slot width) of the slit (slot) is as narrow as 0.1 mm or less. For this reason, when applying the coating liquid to the coating object, due to this narrowness, the variation in the processing accuracy of the slot in the width direction of the coating object is large in the variation of the wet thickness of the coating liquid. As a result, a coating film having coating unevenness may be obtained. Such a coating film has a reduced quality.
本発明は、上記事情に鑑み、塗工ムラによる品質低下が抑制された塗工膜を得ることが可能な塗工膜形成方法を提供することを課題とする。
In view of the above circumstances, an object of the present invention is to provide a coating film forming method capable of obtaining a coating film in which deterioration in quality due to coating unevenness is suppressed.
本発明に係る塗工膜形成方法は、
塗工液を吐出する吐出口を有し、該吐出口に対して相対的に移動している被塗工物に、
前記吐出口から前記塗工液を吐出して塗工する塗工装置を用いて、前記被塗工物に前記塗工液を塗工して塗工膜を形成する塗工膜形成方法であって、
前記塗工液として所定の伸長度を有するものを用い、前記吐出口から前記被塗工物に前記塗工液が吐出されているとき、前記吐出口側において膨らんでいる膨出部分と、該膨出部分から前記被塗工物まで先細りとなるように前記被塗工物の移動方向下流側に延びている延在部分とを有するビードを形成しつつ前記吐出口と前記被塗工物とを結ぶ状態を維持しながら前記被塗工物に前記塗工液を塗工し、且つ、
前記膨出部分の大きさに応じて、前記膨出部分が前記被塗工物に接触しないように前記吐出口と前記被塗工物との間のギャップを調整して前記被塗工物に前記塗工液を塗工する方法である。 The coating film forming method according to the present invention is:
An object to be coated that has a discharge port for discharging the coating liquid and moves relative to the discharge port.
A coating film forming method for forming a coating film by applying the coating liquid to the object to be coated, using a coating apparatus that discharges the coating liquid from the discharge port. And
Using the coating liquid having a predetermined elongation, when the coating liquid is discharged from the discharge port to the coated object, a bulging portion that swells on the discharge port side, and Forming the bead having an extended portion extending downstream in the moving direction of the coated object so as to taper from the bulging portion to the coated object, and the discharge port and the coated object; Applying the coating liquid to the object to be coated while maintaining the state of tying, and
According to the size of the bulging portion, the gap between the discharge port and the coating object is adjusted so that the bulging portion does not contact the coating object. It is a method of applying the coating liquid.
塗工液を吐出する吐出口を有し、該吐出口に対して相対的に移動している被塗工物に、
前記吐出口から前記塗工液を吐出して塗工する塗工装置を用いて、前記被塗工物に前記塗工液を塗工して塗工膜を形成する塗工膜形成方法であって、
前記塗工液として所定の伸長度を有するものを用い、前記吐出口から前記被塗工物に前記塗工液が吐出されているとき、前記吐出口側において膨らんでいる膨出部分と、該膨出部分から前記被塗工物まで先細りとなるように前記被塗工物の移動方向下流側に延びている延在部分とを有するビードを形成しつつ前記吐出口と前記被塗工物とを結ぶ状態を維持しながら前記被塗工物に前記塗工液を塗工し、且つ、
前記膨出部分の大きさに応じて、前記膨出部分が前記被塗工物に接触しないように前記吐出口と前記被塗工物との間のギャップを調整して前記被塗工物に前記塗工液を塗工する方法である。 The coating film forming method according to the present invention is:
An object to be coated that has a discharge port for discharging the coating liquid and moves relative to the discharge port.
A coating film forming method for forming a coating film by applying the coating liquid to the object to be coated, using a coating apparatus that discharges the coating liquid from the discharge port. And
Using the coating liquid having a predetermined elongation, when the coating liquid is discharged from the discharge port to the coated object, a bulging portion that swells on the discharge port side, and Forming the bead having an extended portion extending downstream in the moving direction of the coated object so as to taper from the bulging portion to the coated object, and the discharge port and the coated object; Applying the coating liquid to the object to be coated while maintaining the state of tying, and
According to the size of the bulging portion, the gap between the discharge port and the coating object is adjusted so that the bulging portion does not contact the coating object. It is a method of applying the coating liquid.
ここで、膨出部分とは、吐出口側において被塗工物側の部分(延在部分)よりも膨らんでいる部分であって、且つ、被塗工物と直接接触しないように、被塗工物との間に隙間が形成されているような部分を意味する。
また、伸長度とは、内径2mmの円筒部材の開口から、該開口から1mm離れた位置にて30m/minの回転速度で回転するロールに、塗工液を5g/minの速度で吐出させ、円筒部材の開口とロールとの間隔(測定ギャップD)を1mmから大きくしていったとき、開口とロールとを結んでいる塗工液が切断されたときの上記開口とロールとの間隔を表す数値(mm)を意味する。 Here, the bulging portion is a portion that swells more than a portion (extended portion) on the side of the object to be coated on the discharge port side, and is coated so as not to come into direct contact with the object to be coated. It means a part where a gap is formed between the workpiece.
Further, the degree of elongation means that the coating liquid is discharged at a speed of 5 g / min from a opening of a cylindrical member having an inner diameter of 2 mm to a roll rotating at a rotational speed of 30 m / min at aposition 1 mm away from the opening. When the distance between the opening of the cylindrical member and the roll (measurement gap D) is increased from 1 mm, the distance between the opening and the roll when the coating liquid connecting the opening and the roll is cut is represented. A numerical value (mm) is meant.
また、伸長度とは、内径2mmの円筒部材の開口から、該開口から1mm離れた位置にて30m/minの回転速度で回転するロールに、塗工液を5g/minの速度で吐出させ、円筒部材の開口とロールとの間隔(測定ギャップD)を1mmから大きくしていったとき、開口とロールとを結んでいる塗工液が切断されたときの上記開口とロールとの間隔を表す数値(mm)を意味する。 Here, the bulging portion is a portion that swells more than a portion (extended portion) on the side of the object to be coated on the discharge port side, and is coated so as not to come into direct contact with the object to be coated. It means a part where a gap is formed between the workpiece.
Further, the degree of elongation means that the coating liquid is discharged at a speed of 5 g / min from a opening of a cylindrical member having an inner diameter of 2 mm to a roll rotating at a rotational speed of 30 m / min at a
上記構成の塗工膜形成方法においては、
前記所定の伸長度が2mm以上であってもよい。 In the coating film forming method of the above configuration,
The predetermined extension may be 2 mm or more.
前記所定の伸長度が2mm以上であってもよい。 In the coating film forming method of the above configuration,
The predetermined extension may be 2 mm or more.
上記構成の塗工膜形成方法においては、
前記被塗工物と前記吐出口との間のギャップを、0.5~2mmとしてもよい。 In the coating film forming method of the above configuration,
A gap between the object to be coated and the discharge port may be set to 0.5 to 2 mm.
前記被塗工物と前記吐出口との間のギャップを、0.5~2mmとしてもよい。 In the coating film forming method of the above configuration,
A gap between the object to be coated and the discharge port may be set to 0.5 to 2 mm.
上記構成の塗工膜形成方法においては、
前記吐出口の間隔を、0.05~1.5mmとしてもよい。 In the coating film forming method of the above configuration,
The interval between the discharge ports may be 0.05 to 1.5 mm.
前記吐出口の間隔を、0.05~1.5mmとしてもよい。 In the coating film forming method of the above configuration,
The interval between the discharge ports may be 0.05 to 1.5 mm.
まず、本発明の一実施形態の塗工膜形成方法に用いられる塗工装置について説明する。
First, a coating apparatus used in the coating film forming method of one embodiment of the present invention will be described.
図1、図2に示すように、本実施形態の塗工膜形成方法に用いられる塗工装置1は、
塗工液23を吐出する吐出口3aaを有し、該吐出口3aaに対して相対的に移動している被塗工物21に、前記吐出口3aaから前記塗工液23を吐出して塗工する塗工部3を備え、
前記塗工部3によって前記被塗工物21に塗工された前記塗工液23を固化させて塗工膜25を形成するように構成されている。
塗工装置1は、前記吐出口3aaから前記被塗工物21に所定の伸長度を有する前記塗工液23が吐出されているとき、前記塗工液23が、前記吐出口3aa側において膨らんでいる膨出部分23aと、該膨出部分23aから前記被塗工物21まで先細りとなるように前記被塗工物21の移動方向Mの下流側に向かって斜めに延びている延在部分23bとを有するビードを形成しつつ前記吐出口3aaと前記被塗工物21とを結ぶ状態を維持するように構成されている。
塗工装置1は、前記膨出部分23aの大きさに応じて、前記膨出部分23aが前記被塗工物21に接触しないように前記吐出口3aaと前記被塗工物21との間のギャップGが調整されるように構成されている。 As shown in FIG. 1 and FIG. 2, thecoating apparatus 1 used in the coating film forming method of the present embodiment is
Thecoating liquid 23 is discharged from the discharge port 3aa to the coating object 21 having a discharge port 3aa for discharging the coating liquid 23 and moving relative to the discharge port 3aa. It has a coating part 3 to work on,
Thecoating unit 3 is configured to solidify the coating solution 23 applied to the workpiece 21 to form a coating film 25.
In thecoating apparatus 1, when the coating liquid 23 having a predetermined elongation degree is discharged from the discharge port 3aa to the workpiece 21, the coating liquid 23 swells on the discharge port 3aa side. A bulging portion 23a that extends, and an extending portion that extends obliquely toward the downstream side in the moving direction M of the workpiece 21 so as to taper from the bulging portion 23a to the workpiece 21. 23b is formed so as to maintain a state of connecting the discharge port 3aa and the workpiece 21 while forming a bead having 23b.
Thecoating apparatus 1 is arranged between the discharge port 3aa and the workpiece 21 so that the bulging portion 23a does not contact the workpiece 21 according to the size of the bulging portion 23a. The gap G is configured to be adjusted.
塗工液23を吐出する吐出口3aaを有し、該吐出口3aaに対して相対的に移動している被塗工物21に、前記吐出口3aaから前記塗工液23を吐出して塗工する塗工部3を備え、
前記塗工部3によって前記被塗工物21に塗工された前記塗工液23を固化させて塗工膜25を形成するように構成されている。
塗工装置1は、前記吐出口3aaから前記被塗工物21に所定の伸長度を有する前記塗工液23が吐出されているとき、前記塗工液23が、前記吐出口3aa側において膨らんでいる膨出部分23aと、該膨出部分23aから前記被塗工物21まで先細りとなるように前記被塗工物21の移動方向Mの下流側に向かって斜めに延びている延在部分23bとを有するビードを形成しつつ前記吐出口3aaと前記被塗工物21とを結ぶ状態を維持するように構成されている。
塗工装置1は、前記膨出部分23aの大きさに応じて、前記膨出部分23aが前記被塗工物21に接触しないように前記吐出口3aaと前記被塗工物21との間のギャップGが調整されるように構成されている。 As shown in FIG. 1 and FIG. 2, the
The
The
In the
The
塗工装置1は、さらに、塗工部3によって塗工された塗工液23を固化させて塗工膜25を形成する固化部13を備えている。
The coating apparatus 1 further includes a solidifying unit 13 that solidifies the coating liquid 23 applied by the coating unit 3 to form a coating film 25.
塗工装置1は、さらに、被塗工物21を表面で支持しつつ、該被塗工物21の長手方向において塗工部3に対して相対的に移動させる支持部15を備えている。
The coating apparatus 1 further includes a support portion 15 that moves relative to the coating portion 3 in the longitudinal direction of the workpiece 21 while supporting the workpiece 21 on the surface.
被塗工物21としては、特に限定されないが、例えば、図1に示すような帯状のものが挙げられ、例えば、帯状のシート部材等が挙げられる。
かかるシート部材としては、例えば、樹脂フィルムが挙げられる。また、樹脂フィルムとしては、例えば、以下に示すような樹脂フィルム等が挙げられる。
すなわち、樹脂フィルムは、特に限定されるものではなく、用途に応じて適宜選択され得る。例えば、光学用途として用いられる樹脂フィルムとしては、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系ポリマー、ジアセチルセルロース、トリアセチルセルロース等のセルロース系ポリマー、ポリカーボネート系ポリマー、ポリメチルメタクリレート等のアクリル系ポリマー、ポリスチレン、アクリロニトリル-スチレン共重合体等のスチレン系ポリマー、ポリエチレン、ポリプロピレン、環状ないしノルボルネン構造を有するポリオレフィン、エチレン-プロピレン共重合体等のオレフィン系ポリマー、塩化ビニル系ポリマー、ナイロンや芳香族ポリアミド等のアミド系ポリマー等の透明ポリマーからなるフィルムを好適に使用することができる。
さらに、光学用途として用いられる樹脂フィルムとしては、イミド系ポリマー、スルホン系ポリマー、ポリエーテルスルホン系ポリマー、ポリエーテルエーテルケトン系ポリマー、ポリフェニレンスルフィド系ポリマー、ビニルアルコール系ポリマー、塩化ビニリデン系ポリマー、ビニルブチラール系ポリマー、アリレート系ポリマー、ポリオキシメチレン系ポリマー、エポキシ系ポリマーや前記ポリマーのブレンド物等の透明ポリマーからなるフィルムなども挙げることができる。
被塗工物21については、後述する。 Although it does not specifically limit as the to-be-coatedarticle 21, For example, a strip | belt-shaped thing as shown in FIG. 1 is mentioned, For example, a strip | belt-shaped sheet | seat member etc. are mentioned.
An example of such a sheet member is a resin film. Moreover, as a resin film, the following resin films etc. are mentioned, for example.
That is, the resin film is not particularly limited, and can be appropriately selected depending on the application. For example, as resin films used for optical applications, polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulose polymers such as diacetyl cellulose and triacetyl cellulose, polycarbonate polymers, acrylic polymers such as polymethyl methacrylate, polystyrene Styrene polymer such as acrylonitrile-styrene copolymer, polyethylene, polypropylene, polyolefin having cyclic or norbornene structure, olefin polymer such as ethylene-propylene copolymer, vinyl chloride polymer, amide such as nylon and aromatic polyamide A film made of a transparent polymer such as a base polymer can be suitably used.
Furthermore, resin films used for optical applications include imide polymers, sulfone polymers, polyether sulfone polymers, polyether ether ketone polymers, polyphenylene sulfide polymers, vinyl alcohol polymers, vinylidene chloride polymers, vinyl butyral. A film made of a transparent polymer such as a polymer, an arylate polymer, a polyoxymethylene polymer, an epoxy polymer or a blend of the above-mentioned polymers can also be exemplified.
Theworkpiece 21 will be described later.
かかるシート部材としては、例えば、樹脂フィルムが挙げられる。また、樹脂フィルムとしては、例えば、以下に示すような樹脂フィルム等が挙げられる。
すなわち、樹脂フィルムは、特に限定されるものではなく、用途に応じて適宜選択され得る。例えば、光学用途として用いられる樹脂フィルムとしては、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系ポリマー、ジアセチルセルロース、トリアセチルセルロース等のセルロース系ポリマー、ポリカーボネート系ポリマー、ポリメチルメタクリレート等のアクリル系ポリマー、ポリスチレン、アクリロニトリル-スチレン共重合体等のスチレン系ポリマー、ポリエチレン、ポリプロピレン、環状ないしノルボルネン構造を有するポリオレフィン、エチレン-プロピレン共重合体等のオレフィン系ポリマー、塩化ビニル系ポリマー、ナイロンや芳香族ポリアミド等のアミド系ポリマー等の透明ポリマーからなるフィルムを好適に使用することができる。
さらに、光学用途として用いられる樹脂フィルムとしては、イミド系ポリマー、スルホン系ポリマー、ポリエーテルスルホン系ポリマー、ポリエーテルエーテルケトン系ポリマー、ポリフェニレンスルフィド系ポリマー、ビニルアルコール系ポリマー、塩化ビニリデン系ポリマー、ビニルブチラール系ポリマー、アリレート系ポリマー、ポリオキシメチレン系ポリマー、エポキシ系ポリマーや前記ポリマーのブレンド物等の透明ポリマーからなるフィルムなども挙げることができる。
被塗工物21については、後述する。 Although it does not specifically limit as the to-be-coated
An example of such a sheet member is a resin film. Moreover, as a resin film, the following resin films etc. are mentioned, for example.
That is, the resin film is not particularly limited, and can be appropriately selected depending on the application. For example, as resin films used for optical applications, polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulose polymers such as diacetyl cellulose and triacetyl cellulose, polycarbonate polymers, acrylic polymers such as polymethyl methacrylate, polystyrene Styrene polymer such as acrylonitrile-styrene copolymer, polyethylene, polypropylene, polyolefin having cyclic or norbornene structure, olefin polymer such as ethylene-propylene copolymer, vinyl chloride polymer, amide such as nylon and aromatic polyamide A film made of a transparent polymer such as a base polymer can be suitably used.
Furthermore, resin films used for optical applications include imide polymers, sulfone polymers, polyether sulfone polymers, polyether ether ketone polymers, polyphenylene sulfide polymers, vinyl alcohol polymers, vinylidene chloride polymers, vinyl butyral. A film made of a transparent polymer such as a polymer, an arylate polymer, a polyoxymethylene polymer, an epoxy polymer or a blend of the above-mentioned polymers can also be exemplified.
The
支持部15は、長手方向に移動する被塗工物21を、塗工部3の反対側から支持するものである。支持部15に支持されて塗工部3に対して相対的に移動する被塗工物21に塗工液23が塗工される。
かかる支持部15としては、ロール等が挙げられる。 Thesupport portion 15 supports the workpiece 21 that moves in the longitudinal direction from the opposite side of the coating portion 3. The coating liquid 23 is applied to the workpiece 21 that is supported by the support portion 15 and moves relative to the coating portion 3.
Examples of thesupport portion 15 include a roll.
かかる支持部15としては、ロール等が挙げられる。 The
Examples of the
本実施形態では、支持部15は、塗工部3の吐出口3aaと対向する位置において、該吐出口3aaに対して、被塗工物21を相対的に一方(図1の上方)から他方(図1の下方)に移動させるようになっている。
In the present embodiment, the support portion 15 is configured so that the workpiece 21 is relatively moved from one side (upper side in FIG. 1) to the other side with respect to the discharge port 3aa at a position facing the discharge port 3aa of the coating unit 3. (Below FIG. 1).
固化部13は、塗工液23を固化させて塗工膜25を形成するように構成されている。
この固化部13によって固化されることにより、塗工膜25が形成される。固化部13は、塗工液23を固化させ得るものであればよく、特に限定されない。かかる固化部13は、塗工液23の種類等に応じて適宜設定される。 The solidifyingunit 13 is configured to form the coating film 25 by solidifying the coating liquid 23.
Thecoating film 25 is formed by being solidified by the solidified portion 13. The solidification part 13 should just be what can solidify the coating liquid 23, and is not specifically limited. The solidifying part 13 is appropriately set according to the type of the coating liquid 23 and the like.
この固化部13によって固化されることにより、塗工膜25が形成される。固化部13は、塗工液23を固化させ得るものであればよく、特に限定されない。かかる固化部13は、塗工液23の種類等に応じて適宜設定される。 The solidifying
The
本実施形態では、塗工部3として、スロット8を有するダイが採用されている。このようにダイを備えた塗工装置1は、ダイコーターと呼ばれる。
In this embodiment, a die having a slot 8 is employed as the coating unit 3. The coating apparatus 1 provided with a die in this way is called a die coater.
塗工部3は、スロット8の吐出口3aaから塗工液23を吐出して、相対的に移動している被塗工物21上に塗工液23を塗工するようになっている。
塗工部3は、スロット8の吐出口3aaが側方(水平方向)を向くように配されており、吐出口3aaに対して相対的に上下方向に移動している被塗工物21に塗工液23を吐出するようになっている。塗工部3には、塗工液23の収容部(不図示)から、配管(不図示)及びポンプ(不図示)を介して塗工液23が供給されるようになっている。 Thecoating unit 3 discharges the coating liquid 23 from the discharge port 3aa of the slot 8 to apply the coating liquid 23 onto the workpiece 21 that is relatively moving.
Thecoating unit 3 is disposed so that the discharge port 3aa of the slot 8 faces sideward (horizontal direction), and is applied to the workpiece 21 that is moving up and down relative to the discharge port 3aa. The coating liquid 23 is discharged. The coating liquid 3 is supplied to the coating part 3 from a container (not shown) for the coating liquid 23 via a pipe (not shown) and a pump (not shown).
塗工部3は、スロット8の吐出口3aaが側方(水平方向)を向くように配されており、吐出口3aaに対して相対的に上下方向に移動している被塗工物21に塗工液23を吐出するようになっている。塗工部3には、塗工液23の収容部(不図示)から、配管(不図示)及びポンプ(不図示)を介して塗工液23が供給されるようになっている。 The
The
具体的には、塗工部3は、上流側のダイブロック5と、上流側のダイブロック5と対向して配された下流側のダイブロック7とを備える。塗工部3は、上流側のダイブロック5と下流側のダイブロック7とを合掌させることによって形成されている。このように両ダイブロック5、7を合掌させることによって、これらの間には、ポンプ(不図示)によって供給された塗工液23が溜められるマニホールド9と、該マニホールド9から先端縁に向かって配されたスロット8とが形成されている。また、上流側のダイブロック5の先端縁である上流側リップ部5aと下流側のダイブロック7の先端縁である下流側リップ部7aとの間の隙間が、スロット8の吐出口3aaとなっている。
Specifically, the coating unit 3 includes an upstream die block 5 and a downstream die block 7 arranged to face the upstream die block 5. The coating part 3 is formed by bringing the upstream die block 5 and the downstream die block 7 together. By bringing the two die blocks 5 and 7 together, the manifold 9 in which the coating liquid 23 supplied by a pump (not shown) is stored and the manifold 9 toward the leading edge are provided between them. A slot 8 is formed. Further, a gap between the upstream lip portion 5 a that is the leading edge of the upstream die block 5 and the downstream lip portion 7 a that is the leading edge of the downstream die block 7 becomes the discharge port 3 aa of the slot 8. ing.
上流側リップ部5aと下流側リップ部7aとは、支持部15の径方向Rと垂直な平面上に位置するように配されている。スロット8は、支持部15の径方向Rと平行に配されている。
吐出口3aaの間隔、すなわち、被塗工物21の移動方向Mにおける長さ(スロット幅)は、特に限定されず、適宜設定され得る。
例えば、スロット幅が小さ過ぎると、スロット8の加工精度のバラツキが塗工膜25のウェット厚みのバラツキに及ぼす悪影響が大きくなり過ぎ、そのバラツキが許容できないものとなるおそれがある。一方、スロット幅が大き過ぎると、ダイの内圧が低下してダイ内部で幅方向に塗工液23を均一に分配できず、塗工膜25のウェット厚みのバラツキが許容できなくなるおそれがある。
かかる観点を考慮すると、スロット幅は、例えば、0.05~1.5mmが好ましく、0.1~1.5mmがより好ましく、0.3~1.2mmがさらに好ましい。特に、後述する実施例に示すように、スロット幅が0.3~1.2mmである場合には、この数値範囲でスロット幅を変化させても塗工可能な条件範囲が変わらないため、この点でも、好ましい。 Theupstream lip portion 5 a and the downstream lip portion 7 a are disposed so as to be positioned on a plane perpendicular to the radial direction R of the support portion 15. The slot 8 is arranged in parallel with the radial direction R of the support portion 15.
The interval between the discharge ports 3aa, that is, the length (slot width) in the moving direction M of theworkpiece 21 is not particularly limited and can be set as appropriate.
For example, if the slot width is too small, the variation in the processing accuracy of theslot 8 will have an adverse effect on the variation in the wet thickness of the coating film 25, and the variation may be unacceptable. On the other hand, if the slot width is too large, the internal pressure of the die is lowered, and the coating liquid 23 cannot be uniformly distributed in the width direction inside the die, so that there is a possibility that variation in the wet thickness of the coating film 25 cannot be allowed.
Considering this viewpoint, for example, the slot width is preferably 0.05 to 1.5 mm, more preferably 0.1 to 1.5 mm, and further preferably 0.3 to 1.2 mm. In particular, as shown in the examples to be described later, when the slot width is 0.3 to 1.2 mm, even if the slot width is changed within this numerical range, the coating condition range does not change. This is also preferable.
吐出口3aaの間隔、すなわち、被塗工物21の移動方向Mにおける長さ(スロット幅)は、特に限定されず、適宜設定され得る。
例えば、スロット幅が小さ過ぎると、スロット8の加工精度のバラツキが塗工膜25のウェット厚みのバラツキに及ぼす悪影響が大きくなり過ぎ、そのバラツキが許容できないものとなるおそれがある。一方、スロット幅が大き過ぎると、ダイの内圧が低下してダイ内部で幅方向に塗工液23を均一に分配できず、塗工膜25のウェット厚みのバラツキが許容できなくなるおそれがある。
かかる観点を考慮すると、スロット幅は、例えば、0.05~1.5mmが好ましく、0.1~1.5mmがより好ましく、0.3~1.2mmがさらに好ましい。特に、後述する実施例に示すように、スロット幅が0.3~1.2mmである場合には、この数値範囲でスロット幅を変化させても塗工可能な条件範囲が変わらないため、この点でも、好ましい。 The
The interval between the discharge ports 3aa, that is, the length (slot width) in the moving direction M of the
For example, if the slot width is too small, the variation in the processing accuracy of the
Considering this viewpoint, for example, the slot width is preferably 0.05 to 1.5 mm, more preferably 0.1 to 1.5 mm, and further preferably 0.3 to 1.2 mm. In particular, as shown in the examples to be described later, when the slot width is 0.3 to 1.2 mm, even if the slot width is changed within this numerical range, the coating condition range does not change. This is also preferable.
下流側リップ部7aの長さが小さい程、膨出部分23aが小さくなるため、その分、膨出部分23aと被塗工物21とが非接触である状態を維持しつつ被塗工物21と吐出口3aaとの距離(ギャップ)Gを小さくすることができる。かかる観点を考慮すると、下流側リップ部7aの長さは、0.1mm以上4mm以下であることが好ましい。
ギャップGは、塗工された塗工液23の固化前の厚み(塗工膜25のウェット厚み)の2.5~20倍が好ましく、3~15倍がより好ましい。また、ギャップGは、0.5~2mmが好ましく、0.5~1.5mmがより好ましい。 The smaller the length of thedownstream lip portion 7a, the smaller the bulging portion 23a, and accordingly, the workpiece 21 is maintained while the bulging portion 23a and the workpiece 21 are not in contact with each other. And the discharge port 3aa can be reduced in distance (gap) G. Considering this viewpoint, the length of the downstream lip 7a is preferably 0.1 mm or more and 4 mm or less.
The gap G is preferably 2.5 to 20 times, and more preferably 3 to 15 times the thickness of thecoated coating solution 23 before solidification (wet thickness of the coating film 25). The gap G is preferably 0.5 to 2 mm, and more preferably 0.5 to 1.5 mm.
ギャップGは、塗工された塗工液23の固化前の厚み(塗工膜25のウェット厚み)の2.5~20倍が好ましく、3~15倍がより好ましい。また、ギャップGは、0.5~2mmが好ましく、0.5~1.5mmがより好ましい。 The smaller the length of the
The gap G is preferably 2.5 to 20 times, and more preferably 3 to 15 times the thickness of the
図1には、塗工部3が、相対的に移動する帯状の被塗工物21に対して連続して塗工液23を吐出して塗工する態様を示すが、塗工部3が塗工液23を塗工する態様は、図1の態様に限定されるものではない。また、図1には、被塗工物21が時計回りに移動する態様を示すが、被塗工物21の移動方向も特に限定されるものではない。
FIG. 1 shows a mode in which the coating unit 3 continuously applies the coating liquid 23 to the strip-shaped coated object 21 that moves relatively. The aspect of applying the coating liquid 23 is not limited to the aspect of FIG. FIG. 1 shows a mode in which the workpiece 21 moves clockwise, but the moving direction of the workpiece 21 is not particularly limited.
次いで、上記塗工装置1を用いる本実施形態の塗工膜形成方法について説明する。
Next, the coating film forming method of the present embodiment using the coating apparatus 1 will be described.
本実施形態の塗工膜形成方法は、塗工液23を吐出する吐出口3aaを有し、該吐出口3aaに対して相対的に移動している被塗工物21に、前記吐出口3aaから前記塗工液23を吐出して塗工する塗工装置1を用いて、前記被塗工物21に前記塗工液23を塗工して塗工膜を形成する方法である。
The coating film forming method of the present embodiment has a discharge port 3aa for discharging the coating liquid 23, and the discharge port 3aa is applied to an object to be coated 21 that moves relative to the discharge port 3aa. In this method, the coating liquid 23 is applied to the workpiece 21 to form a coating film by using the coating apparatus 1 that discharges the coating liquid 23 to apply the coating liquid 23.
該塗工膜形成方法においては、前記塗工液23として所定の伸長度を有するものを用いる。すなわち、下記の形状のビードを形成可能なものを用いる。
該塗工膜形成方法においては、前記吐出口3aaから前記被塗工物21に前記塗工液23が吐出されているとき、前記吐出口3aa側において膨らんでいる膨出部分23aと、該膨出部分23aから前記被塗工物21まで先細りとなるように前記被塗工物21の移動方向Mの下流側に向かって斜めに延びている延在部分23bとを有するビードを形成しつつ前記吐出口3aaと前記被塗工物21とを結ぶ状態を維持しながら前記被塗工物21に前記塗工液23を塗工する。 In the coating film forming method, thecoating liquid 23 having a predetermined elongation is used. That is, a material capable of forming a bead having the following shape is used.
In the coating film forming method, when thecoating liquid 23 is being discharged from the discharge port 3aa to the object to be coated 21, a bulging portion 23a that swells on the discharge port 3aa side, While forming a bead having an extended portion 23b extending obliquely toward the downstream side in the moving direction M of the workpiece 21 so as to taper from the protruding portion 23a to the workpiece 21, The coating liquid 23 is applied to the coating object 21 while maintaining a state where the discharge port 3aa and the coating object 21 are connected.
該塗工膜形成方法においては、前記吐出口3aaから前記被塗工物21に前記塗工液23が吐出されているとき、前記吐出口3aa側において膨らんでいる膨出部分23aと、該膨出部分23aから前記被塗工物21まで先細りとなるように前記被塗工物21の移動方向Mの下流側に向かって斜めに延びている延在部分23bとを有するビードを形成しつつ前記吐出口3aaと前記被塗工物21とを結ぶ状態を維持しながら前記被塗工物21に前記塗工液23を塗工する。 In the coating film forming method, the
In the coating film forming method, when the
しかも、該塗工膜形成方法においては、前記膨出部分23aの大きさに応じて、前記膨出部分23aが前記被塗工物21に接触しないように前記吐出口3aaと前記被塗工物21との間のギャップGを調整して前記被塗工物21に前記塗工液23を塗工する。
Moreover, in the coating film forming method, the discharge port 3aa and the article to be coated are arranged so that the bulging part 23a does not contact the article to be coated 21 according to the size of the bulging part 23a. The coating liquid 23 is applied to the workpiece 21 by adjusting the gap G between the coating liquid 21 and the workpiece 21.
具体的には、本実施形態の塗工膜形成方法は、
上記伸長度を有する塗工液23を用い、膨出部分23aの大きさに応じて、膨出部分23aが被塗工物21に接触しないようにギャップGを調整した塗工装置1の塗工部3の吐出口3aaから塗工液23を吐出し、該吐出口3aaに対して相対的に移動している被塗工物21に該塗工液23を塗工する工程と、
被塗工物21に塗工された塗工液23を固化させて塗工膜25を得る工程とを備える。 Specifically, the coating film forming method of this embodiment is:
Coating of thecoating apparatus 1 using the coating liquid 23 having the above-described elongation and adjusting the gap G so that the bulging portion 23a does not contact the workpiece 21 according to the size of the bulging portion 23a. A step of discharging the coating liquid 23 from the discharge port 3aa of the section 3 and applying the coating liquid 23 to the workpiece 21 moving relative to the discharge port 3aa;
And a step of solidifying thecoating liquid 23 applied to the workpiece 21 to obtain a coating film 25.
上記伸長度を有する塗工液23を用い、膨出部分23aの大きさに応じて、膨出部分23aが被塗工物21に接触しないようにギャップGを調整した塗工装置1の塗工部3の吐出口3aaから塗工液23を吐出し、該吐出口3aaに対して相対的に移動している被塗工物21に該塗工液23を塗工する工程と、
被塗工物21に塗工された塗工液23を固化させて塗工膜25を得る工程とを備える。 Specifically, the coating film forming method of this embodiment is:
Coating of the
And a step of solidifying the
より具体的には、本実施形態の塗工膜形成方法においては、まず、吐出口3aaと被塗工物21とを結ぶ塗工液23が、上記した膨出部分23aと延在部分23bとを有するビードが形成されるように、且つ、膨出部分23aが被塗工物21に接触しないように、塗工液23の種類及び性状に応じて、吐出口3aaからの塗工液23の吐出量、被塗工物21の移動速度、及び、被塗工物21に対する塗工部3の配置を設定する。塗工部3の配置の設定においては、上記伸長度を有する塗工液23を用い、膨出部分23aの大きさに応じて、膨出部分23aが被塗工物21に接触しないようにギャップGを調整する。そして、設定した条件で、塗工部3の吐出口3aaから被塗工物21に塗工液23を吐出して塗工する。次いで、被塗工物21上に塗工された塗工液23を、固化部13によって固化させて、塗工膜25を得る。
More specifically, in the coating film forming method of the present embodiment, first, the coating liquid 23 that connects the discharge port 3aa and the article to be coated 21 is the above-described bulging portion 23a and extending portion 23b. In accordance with the type and properties of the coating liquid 23, the coating liquid 23 from the discharge port 3 aa is formed so that a bead having a thickness is formed and the bulging portion 23 a is not in contact with the workpiece 21. The discharge amount, the moving speed of the workpiece 21 and the arrangement of the coating unit 3 with respect to the workpiece 21 are set. In setting the arrangement of the coating portion 3, the coating liquid 23 having the above-described elongation is used, and a gap is provided so that the bulging portion 23 a does not contact the workpiece 21 according to the size of the bulging portion 23 a. Adjust G. Then, under the set conditions, the coating liquid 23 is discharged from the discharge port 3aa of the coating unit 3 to the object to be coated 21 for coating. Next, the coating liquid 23 applied on the workpiece 21 is solidified by the solidifying unit 13 to obtain a coating film 25.
かかる塗工液23の膨出部分23a及び延在部分23bの形状は、塗工液23の種類、塗工膜25のウェット厚みT、被塗工物21の移動速度に応じて吐出口3aaと被塗工物21との間のギャップGが調整されることによって、決定される。
The shape of the bulging portion 23 a and the extending portion 23 b of the coating liquid 23 is different from the discharge port 3 aa according to the type of the coating liquid 23, the wet thickness T of the coating film 25, and the moving speed of the workpiece 21. It is determined by adjusting the gap G with the workpiece 21.
かかる塗工液23は、固化成分を含有し、被塗工物21に塗工されて、該被塗工物21上で固化されるものである。
The coating liquid 23 contains a solidifying component, and is applied to the object 21 to be solidified on the object 21.
かかる塗工液23の種類は、吐出口3aaと被塗工物21とを結ぶ塗工液23が、上記した膨出部分23aと延在部分23bとを有する形状となるような所定の伸長度を有するように、適宜設定され得る。
The kind of the coating liquid 23 is a predetermined degree of elongation such that the coating liquid 23 that connects the discharge port 3aa and the workpiece 21 has a shape having the bulging portion 23a and the extending portion 23b. Can be set as appropriate.
ここで、伸長度は、図3に示すように、内径2mmの円筒部材(伸長度の測定用の円筒部材)の開口から、該開口から1mm離れた位置にて30m/minの回転速度で回転するロール(伸長度の測定用のロール)に、塗工液23を5g/minの速度で吐出させ、円筒部材の開口とロールとの間隔(測定ギャップD)を1mmから大きくしていったとき、開口とロールとを結んでいる塗工液23が切断された際の上記開口とロールとの間隔を表す数値(mm)である。
伸長度の測定の際、室温23℃、相対湿度50%RHの環境下において、塗工液23の温度は、23±2℃に設定される。
上記膨出部分23aと延在部分23bとを有する形状となり易いという点で、塗工液23の伸長度は、2mm以上が好ましく、5mm以上がより好ましい。 Here, as shown in FIG. 3, the extension degree is rotated at a rotational speed of 30 m / min at aposition 1 mm away from the opening of a cylindrical member (cylindrical member for measuring the extension degree) having an inner diameter of 2 mm. When the coating liquid 23 is discharged at a speed of 5 g / min to a roll (a roll for measuring the degree of elongation) and the distance between the opening of the cylindrical member and the roll (measurement gap D) is increased from 1 mm This is a numerical value (mm) representing the distance between the opening and the roll when the coating liquid 23 connecting the opening and the roll is cut.
When measuring the elongation, the temperature of thecoating solution 23 is set to 23 ± 2 ° C. in an environment of room temperature 23 ° C. and relative humidity 50% RH.
The elongation degree of thecoating liquid 23 is preferably 2 mm or more, and more preferably 5 mm or more, in that it tends to have a shape having the bulging portion 23 a and the extending portion 23 b.
伸長度の測定の際、室温23℃、相対湿度50%RHの環境下において、塗工液23の温度は、23±2℃に設定される。
上記膨出部分23aと延在部分23bとを有する形状となり易いという点で、塗工液23の伸長度は、2mm以上が好ましく、5mm以上がより好ましい。 Here, as shown in FIG. 3, the extension degree is rotated at a rotational speed of 30 m / min at a
When measuring the elongation, the temperature of the
The elongation degree of the
塗工液23の伸長度が2mm以上であることによって、塗工液23が十分に伸び易くなるため、被塗工物21に接触しないように膨出部分23aを形成し易くなり、また、途切れることなく延在部分23bを形成し易くなる。
このように、膨出部分23aと延在部分23bとの形成が容易となる。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を、より確実に得ることが可能となる。 When the elongation degree of thecoating liquid 23 is 2 mm or more, the coating liquid 23 is sufficiently easily stretched. Therefore, it is easy to form the bulging portion 23a so as not to come into contact with the article 21 to be coated. It becomes easy to form the extending part 23b without.
Thus, formation of the bulgingpart 23a and the extension part 23b becomes easy.
Therefore, it is possible to more reliably obtain thecoating film 25 in which the deterioration in quality due to the coating unevenness is suppressed.
このように、膨出部分23aと延在部分23bとの形成が容易となる。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を、より確実に得ることが可能となる。 When the elongation degree of the
Thus, formation of the bulging
Therefore, it is possible to more reliably obtain the
上記伸長度の上限は、特に限定されるものではなく、適宜設定され得る。例えば、塗工液23の伸長度が大きくなり過ぎると、塗工液の液切れが悪くなり、これに起因して、塗工液のハンドリング性が悪化するという不具合が生じる傾向にある。従って、例えば、かかる不具合の発生を抑えるという観点を考慮すれば、塗工液23の伸長度は、100mm以下が好ましく、50mm以下がより好ましい。
The upper limit of the degree of elongation is not particularly limited, and can be set as appropriate. For example, when the degree of elongation of the coating liquid 23 becomes too large, the liquid of the coating liquid is deteriorated, and due to this, the handling property of the coating liquid tends to deteriorate. Therefore, for example, considering the viewpoint of suppressing the occurrence of such defects, the degree of elongation of the coating liquid 23 is preferably 100 mm or less, and more preferably 50 mm or less.
このような塗工液23としては、例えばポリマー溶液が挙げられ、上記固化成分として用いられる材料としては、熱硬化性材料、紫外線硬化性材料、電子線硬化性材料等が挙げられる。
Examples of the coating solution 23 include a polymer solution, and examples of the material used as the solidifying component include a thermosetting material, an ultraviolet curable material, and an electron beam curable material.
塗工液23としては、具体的には、例えば、粘着剤が挙げられる。
これらのうち、塗工液23としては、例えば、アクリル系ポリマーが好ましい。これを用いることよって、偏光板を作製し得るという利点がある。 Specific examples of thecoating liquid 23 include an adhesive.
Among these, as thecoating liquid 23, for example, an acrylic polymer is preferable. By using this, there is an advantage that a polarizing plate can be produced.
これらのうち、塗工液23としては、例えば、アクリル系ポリマーが好ましい。これを用いることよって、偏光板を作製し得るという利点がある。 Specific examples of the
Among these, as the
塗工液23の粘度は、0.1Pa・s以上100Pa・s以下が好適であり、0.5Pa・s以上20Pa・s以下がより好適であり、1Pa・s以上20Pa・s以下がさらに好適である。かかる粘度は、後述する実施例に記載された測定方法によって測定された値である。
塗工液23の粘度が0.1Pa・s以上である場合には、乾燥による塗工膜への影響を受け難いという利点がある。
塗工液23の粘度が100Pa・s以下である場合には、公知のポンプが幅広く使用可能となり、また、塗工液のハンドリング性に優れるという利点がある。 The viscosity of thecoating liquid 23 is preferably 0.1 Pa · s or more and 100 Pa · s or less, more preferably 0.5 Pa · s or more and 20 Pa · s or less, and further preferably 1 Pa · s or more and 20 Pa · s or less. It is. Such a viscosity is a value measured by a measuring method described in Examples described later.
When the viscosity of thecoating liquid 23 is 0.1 Pa · s or more, there is an advantage that the coating film is hardly affected by drying.
When the viscosity of thecoating liquid 23 is 100 Pa · s or less, there is an advantage that a known pump can be used widely and the handling property of the coating liquid is excellent.
塗工液23の粘度が0.1Pa・s以上である場合には、乾燥による塗工膜への影響を受け難いという利点がある。
塗工液23の粘度が100Pa・s以下である場合には、公知のポンプが幅広く使用可能となり、また、塗工液のハンドリング性に優れるという利点がある。 The viscosity of the
When the viscosity of the
When the viscosity of the
塗工液23の密度は、700~1500kg/m3が好ましく、800~1400kg/m3がより好ましく、800~1000kg/m3がさらに好ましい。かかる密度は、後述する実施例に記載された測定方法によって測定された値である。
The density of the coating liquid 23 is preferably 700 ~ 1500kg / m 3, more preferably 800 ~ 1400kg / m 3, more preferably 800 ~ 1000kg / m 3. Such a density is a value measured by a measuring method described in Examples described later.
塗工された塗工液23の厚み(塗工膜25のウェット厚み)Tは、特に限定されるものではなく、適宜設定され得る。かかる厚みTは、例えば、塗工液23の粘度に応じて、塗工部3からの塗工液23の吐出量及び被塗工物21の移動速度の少なくとも一方を調整することによって、調整され得る。
塗工された塗工液23の厚みTは、1μm以上500μm以下が好ましく、10μm以上300μm以下がより好ましい。
かかる厚みTは、後述する実施例に記載された測定方法によって測定された値である。 The thickness (the wet thickness of the coating film 25) T of thecoated coating solution 23 is not particularly limited, and can be set as appropriate. The thickness T is adjusted, for example, by adjusting at least one of the discharge amount of the coating liquid 23 from the coating unit 3 and the moving speed of the workpiece 21 according to the viscosity of the coating liquid 23. obtain.
The thickness T of thecoated coating solution 23 is preferably 1 μm or more and 500 μm or less, and more preferably 10 μm or more and 300 μm or less.
The thickness T is a value measured by the measurement method described in the examples described later.
塗工された塗工液23の厚みTは、1μm以上500μm以下が好ましく、10μm以上300μm以下がより好ましい。
かかる厚みTは、後述する実施例に記載された測定方法によって測定された値である。 The thickness (the wet thickness of the coating film 25) T of the
The thickness T of the
The thickness T is a value measured by the measurement method described in the examples described later.
塗工部3の吐出口3aaからの塗工液23の吐出量(流束)は、例えば、8.3×10-8~2.5×10-3m2/sとし得る。
吐出口3aaからの塗工液23の吐出量は、例えば、上記ポンプ(不図示)によって塗工部3に供給する塗工液の供給速度を調整することによって、調整され得る。 The discharge amount (flux) of thecoating liquid 23 from the discharge port 3aa of the coating unit 3 can be, for example, 8.3 × 10 −8 to 2.5 × 10 −3 m 2 / s.
The discharge amount of thecoating liquid 23 from the discharge port 3aa can be adjusted, for example, by adjusting the supply speed of the coating liquid supplied to the coating unit 3 by the pump (not shown).
吐出口3aaからの塗工液23の吐出量は、例えば、上記ポンプ(不図示)によって塗工部3に供給する塗工液の供給速度を調整することによって、調整され得る。 The discharge amount (flux) of the
The discharge amount of the
被塗工物21の厚みは、特に限定されるものではないが、例えば、5~500μmであることが好ましい。
図1では、被塗工物21が可撓性を有する長尺状のものである態様を示すが、その他、被塗工物21が、単板状である態様や、非可撓性を有する態様を採用することもできる。 The thickness of the object to be coated 21 is not particularly limited, but is preferably 5 to 500 μm, for example.
Although FIG. 1 shows an aspect in which the article to be coated 21 is a long and flexible object, other aspects in which the article to be coated 21 is a single plate or inflexibility are shown. An aspect can also be employ | adopted.
図1では、被塗工物21が可撓性を有する長尺状のものである態様を示すが、その他、被塗工物21が、単板状である態様や、非可撓性を有する態様を採用することもできる。 The thickness of the object to be coated 21 is not particularly limited, but is preferably 5 to 500 μm, for example.
Although FIG. 1 shows an aspect in which the article to be coated 21 is a long and flexible object, other aspects in which the article to be coated 21 is a single plate or inflexibility are shown. An aspect can also be employ | adopted.
かかる被塗工物21の移動速度は、例えば、支持部15の回転速度を調整することによって、調整され得る。かかる移動速度は、5~300m/minであることが好ましく、10~100m/minがより好ましく、10~50m/minがさらに好ましい。
被塗工物21の移動速度が、5m/min以上であることによって、駆動系が安定するという利点がある。
被塗工物21の移動速度が、300m/min以下であることによって、被塗工物21と塗工液23との間に空気が入り込み難く、また、被塗工物21と支持部15との間への空気の同伴による蛇行を抑制し得るという利点がある。 The moving speed of theworkpiece 21 can be adjusted, for example, by adjusting the rotational speed of the support portion 15. Such a moving speed is preferably 5 to 300 m / min, more preferably 10 to 100 m / min, still more preferably 10 to 50 m / min.
When the moving speed of theworkpiece 21 is 5 m / min or more, there is an advantage that the drive system is stabilized.
When the moving speed of the object to be coated 21 is 300 m / min or less, it is difficult for air to enter between the object to be coated 21 and thecoating liquid 23. There is an advantage that meandering due to air entrainment between them can be suppressed.
被塗工物21の移動速度が、5m/min以上であることによって、駆動系が安定するという利点がある。
被塗工物21の移動速度が、300m/min以下であることによって、被塗工物21と塗工液23との間に空気が入り込み難く、また、被塗工物21と支持部15との間への空気の同伴による蛇行を抑制し得るという利点がある。 The moving speed of the
When the moving speed of the
When the moving speed of the object to be coated 21 is 300 m / min or less, it is difficult for air to enter between the object to be coated 21 and the
このように、本実施形態の塗工膜形成方法においては、塗工液23が、1~20Pa・sの粘度を有し、800~1000kg/m3の密度を有し、被塗工物21の移動速度が5~50m/minであることがより好適である。
As described above, in the coating film forming method of the present embodiment, the coating liquid 23 has a viscosity of 1 to 20 Pa · s, a density of 800 to 1000 kg / m 3 , and an object to be coated 21. It is more preferable that the moving speed is 5 to 50 m / min.
被塗工物21と吐出口3aaとの間のギャップGは、膨出部分23aが被塗工物21に接触しないように適宜設定されればよく、特に限定されないが、前述したように、例えば、0.5~2mmが好ましく、0.5~1.5mmがより好ましい。
The gap G between the object to be coated 21 and the discharge port 3aa may be set as appropriate so that the bulging portion 23a does not contact the object to be coated 21, and is not particularly limited. 0.5 to 2 mm is preferable, and 0.5 to 1.5 mm is more preferable.
本実施形態に係る塗工装置は、上記のように構成されているので、以下の利点を有するものである。
Since the coating apparatus according to this embodiment is configured as described above, it has the following advantages.
本発明者らが鋭意研究したところ、以下の知見を見出した。
すなわち、図8に示すように塗工を行うと(近接塗工)、ギャップに異物が引っかかるという不具合が生じるおそれがある。 As a result of intensive studies by the present inventors, the following findings have been found.
That is, when coating is performed as shown in FIG. 8 (proximity coating), there is a risk that a foreign matter is caught in the gap.
すなわち、図8に示すように塗工を行うと(近接塗工)、ギャップに異物が引っかかるという不具合が生じるおそれがある。 As a result of intensive studies by the present inventors, the following findings have been found.
That is, when coating is performed as shown in FIG. 8 (proximity coating), there is a risk that a foreign matter is caught in the gap.
ここで、塗工膜を連続して形成しようとすると、被塗工物同士を接合し、接合された被塗工物に塗工する必要がある。この場合、ギャップが小さいと、継ぎ目がギャップに引っかかってしまうおそれがあるため、被塗工物または塗工部を一時的に退避させる必要が生じ得る。そうすると、作業性の低下に繋がる。
Here, if it is going to form a coating film continuously, it is necessary to join to-be-coated objects, and to apply to the joined to-be-coated object. In this case, if the gap is small, the seam may be caught in the gap, so that it may be necessary to temporarily retract the object to be coated or the coating portion. If it does so, it will lead to the fall of workability.
また、被塗工物をロールによって支持しながら移動させる場合には、ギャップが小さいと、その分、ロールの加工精度(円筒度、振れ、撓み等)のバラツキが塗工膜のウェット厚みに及ぼす影響が大きくなるため、得られる塗工膜の厚みにバラツキが生じるおそれがある。
In addition, when the object to be coated is moved while being supported by a roll, if the gap is small, the variation in roll processing accuracy (cylindricity, deflection, deflection, etc.) affects the wet thickness of the coating film. Since the influence becomes large, there is a possibility that the thickness of the obtained coating film varies.
一方、特許文献1の塗工装置のようにギャップを大きくすれば、上記した近接塗工に起因する不具合は解消し得る。
On the other hand, if the gap is increased as in the coating apparatus of Patent Document 1, the above-described problems caused by the proximity coating can be solved.
しかし、特許文献1では、図8の塗工装置とは異なり、真っすぐに、且つ、膜状となるように塗工液を噴出させている。このため、被塗工物に塗工液を塗工する際、被塗工物の幅方向におけるスロットの加工精度のバラツキが塗工液のウェット厚みのバラツキに大きな影響を及ぼし、その結果、塗工ムラを有する塗工膜が得られるおそれがある。
However, in Patent Document 1, unlike the coating apparatus of FIG. 8, the coating liquid is ejected straight and in a film form. For this reason, when applying the coating liquid to the object to be coated, the variation in the processing accuracy of the slot in the width direction of the object to be coated has a great influence on the variation in the wet thickness of the coating liquid. There is a possibility that a coating film having unevenness of work may be obtained.
そこで、本発明者らは、吐出口から吐出された後、被塗工物に至るまでの間に存在している塗工液の外観形状に着目して、さらに鋭意研究した。
Therefore, the inventors of the present invention have further studied earnestly by paying attention to the appearance shape of the coating liquid existing from the discharge port to the object to be coated.
その結果、吐出口から塗工液を吐出しているとき、吐出口と被塗工物とを結んでいる塗工液(ビード)が、吐出口側において膨らんでいる膨出部分と、該膨出部分から被塗工物まで、被塗工物の移動方向下流側に先細りとなるように延びている延在部分とを有する形状となっている場合に、塗工ムラが生じることなく被塗工物に塗工液を塗工し得ることを見出した。また、このような形状は、膨出部分と延在部分とが形成される程度の伸長度を有する塗工液を用い、かかる塗工液に応じて吐出口と被塗工物との間隔を調整することによって実現され得ることを見出した。
As a result, when the coating liquid is discharged from the discharge port, the coating liquid (bead) connecting the discharge port and the object to be coated swells on the discharge port side, and the swelled portion. When it has a shape having an extending part that extends from the protruding part to the object to be coated on the downstream side in the moving direction of the object to be coated, the object can be coated without causing uneven coating. It has been found that a coating liquid can be applied to a workpiece. In addition, such a shape uses a coating liquid having a degree of elongation such that the bulging part and the extending part are formed, and the interval between the discharge port and the object to be coated is set according to the coating liquid. It has been found that it can be realized by adjusting.
これに対し、図8に示すような近接塗工では、膨出部分が形成されない。
一方、近接塗工よりもギャップが大きくても、その大きさが十分でないと、例えば図5に示すように、膨らんだ部分が被塗工物に接触して延在部分が存在しなくなり、その結果、ウェット厚みのバラツキが、被塗工物の移動方向にも、該移動方向と垂直な方向(幅方向)にも大きくなって、塗工ムラが発生するおそれがある。また、ギャップが大きくなり過ぎると、図6及び図7に示すように、延在部分が途切れてしまい(吐出口と被塗工物とが塗工液によって結ばれなくなり)、塗工不能となったり、塗工できたとしても、スジ状の塗工ムラが発生したりするおそれがある。 On the other hand, in the proximity coating as shown in FIG. 8, the bulging portion is not formed.
On the other hand, even if the gap is larger than the proximity coating, if the size is not sufficient, for example, as shown in FIG. As a result, the variation in wet thickness increases both in the direction of movement of the article to be coated and in the direction perpendicular to the movement direction (width direction), which may cause uneven coating. If the gap becomes too large, as shown in FIGS. 6 and 7, the extended portion is interrupted (the discharge port and the object to be coated are not connected by the coating liquid), and the coating becomes impossible. Even if it can be applied, streaky coating unevenness may occur.
一方、近接塗工よりもギャップが大きくても、その大きさが十分でないと、例えば図5に示すように、膨らんだ部分が被塗工物に接触して延在部分が存在しなくなり、その結果、ウェット厚みのバラツキが、被塗工物の移動方向にも、該移動方向と垂直な方向(幅方向)にも大きくなって、塗工ムラが発生するおそれがある。また、ギャップが大きくなり過ぎると、図6及び図7に示すように、延在部分が途切れてしまい(吐出口と被塗工物とが塗工液によって結ばれなくなり)、塗工不能となったり、塗工できたとしても、スジ状の塗工ムラが発生したりするおそれがある。 On the other hand, in the proximity coating as shown in FIG. 8, the bulging portion is not formed.
On the other hand, even if the gap is larger than the proximity coating, if the size is not sufficient, for example, as shown in FIG. As a result, the variation in wet thickness increases both in the direction of movement of the article to be coated and in the direction perpendicular to the movement direction (width direction), which may cause uneven coating. If the gap becomes too large, as shown in FIGS. 6 and 7, the extended portion is interrupted (the discharge port and the object to be coated are not connected by the coating liquid), and the coating becomes impossible. Even if it can be applied, streaky coating unevenness may occur.
このように、ギャップ内の塗工液の形状が上記特定の形状である場合に、塗工ムラに起因する品質低下が抑制された塗工膜を得ることが可能となることを見出して、本実施形態の塗工膜形成方法を完成するに至った。
Thus, when the shape of the coating liquid in the gap is the specific shape, it has been found that it is possible to obtain a coating film in which deterioration in quality due to coating unevenness is suppressed. It came to complete the coating film formation method of embodiment.
すなわち、本実施形態の塗工膜形成方法は、
塗工液23を吐出する吐出口3aaを有し、該吐出口3aaに対して相対的に移動している被塗工物21に、前記吐出口3aaから前記塗工液23を吐出して塗工する塗工装置1を用いて、前記被塗工物21に前記塗工液23を塗工して塗工膜25を形成する塗工膜形成方法であって、
前記塗工液23として所定の伸長度を有するものを用い、前記吐出口3aaから前記被塗工物21に吐出されているとき、前記吐出口3aa側において膨らんでいる膨出部分23aと、該膨出部分23aから前記被塗工物21まで先細りとなるように前記被塗工物21の移動方向Mの下流側に延びている延在部分23bとを有するビードを形成しつつ前記吐出口3aaと前記被塗工物21とを結ぶ状態を維持しながら前記被塗工物21に前記塗工液23を塗工し、且つ、
前記膨出部分23aの大きさに応じて、前記膨出部分23aが前記被塗工物21に接触しないように前記吐出口3aaと前記被塗工物21との間のギャップGを調整して前記被塗工物21に前記塗工液23を塗工する方法である。 That is, the coating film forming method of this embodiment is
Thecoating liquid 23 is discharged from the discharge port 3aa to the coating object 21 having a discharge port 3aa for discharging the coating liquid 23 and moving relative to the discharge port 3aa. A coating film forming method for forming a coating film 25 by applying the coating liquid 23 to the workpiece 21 using the coating apparatus 1 to be worked,
When thecoating liquid 23 having a predetermined elongation is used and discharged from the discharge port 3aa to the object to be coated 21, a bulging portion 23a that swells on the discharge port 3aa side, The discharge port 3aa is formed while forming a bead having an extended portion 23b extending downstream in the moving direction M of the workpiece 21 so as to taper from the bulging portion 23a to the workpiece 21. And applying the coating liquid 23 to the object to be coated 21 while maintaining a state of connecting the object 21 and the object to be coated 21, and
According to the size of the bulgingportion 23a, the gap G between the discharge port 3aa and the workpiece 21 is adjusted so that the bulging portion 23a does not come into contact with the workpiece 21. In this method, the coating liquid 23 is applied to the workpiece 21.
塗工液23を吐出する吐出口3aaを有し、該吐出口3aaに対して相対的に移動している被塗工物21に、前記吐出口3aaから前記塗工液23を吐出して塗工する塗工装置1を用いて、前記被塗工物21に前記塗工液23を塗工して塗工膜25を形成する塗工膜形成方法であって、
前記塗工液23として所定の伸長度を有するものを用い、前記吐出口3aaから前記被塗工物21に吐出されているとき、前記吐出口3aa側において膨らんでいる膨出部分23aと、該膨出部分23aから前記被塗工物21まで先細りとなるように前記被塗工物21の移動方向Mの下流側に延びている延在部分23bとを有するビードを形成しつつ前記吐出口3aaと前記被塗工物21とを結ぶ状態を維持しながら前記被塗工物21に前記塗工液23を塗工し、且つ、
前記膨出部分23aの大きさに応じて、前記膨出部分23aが前記被塗工物21に接触しないように前記吐出口3aaと前記被塗工物21との間のギャップGを調整して前記被塗工物21に前記塗工液23を塗工する方法である。 That is, the coating film forming method of this embodiment is
The
When the
According to the size of the bulging
かかる構成によれば、図8に示すような従来の近接塗工よりもギャップGが大きくなるため、ギャップGが小さ過ぎることに起因する塗工ムラの発生を抑制し得る。
また、近接塗工よりもギャップGは大きいものの、その大きさが十分でないと塗工液23の膨らんだ部分(膨出部分)23aが被塗工物21に接触するおそれがある。しかし、上記のようにギャップGを調整することによって、この接触によって生じる、塗工膜25のウェット厚みのバラツキに起因する塗工ムラの発生を、抑制し得る。
さらに、ギャップGが大き過ぎることによって生じる、塗工液23が途切れることに起因する塗工ムラの発生を抑制し得る。
しかも、吐出口3aaから真っ直ぐ且つ膜状に塗工液23を噴出させるべくスロット幅を小さくする必要がある特許文献1の場合と比較して、膨出部分23aと延在部分23bとが存在し得る程度に塗工液23を吐出する勢いを弱めるべくスロット幅を大きくして塗工液23を吐出することが可能となるため、その分、塗工膜25のウェット厚みのバラツキが発生することを、抑制し得る。
このように、ギャップがG小さ過ぎることに起因する塗工ムラや、ギャップGは大きいものの勢いよく塗工液23が被塗工物21に衝突することに起因する塗工ムラを抑制し得る。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を得ることが可能となる。 According to such a configuration, the gap G is larger than that of the conventional proximity coating as shown in FIG. 8, so that it is possible to suppress the occurrence of coating unevenness due to the gap G being too small.
Further, although the gap G is larger than that of the proximity coating, if the size is not sufficient, the swelled portion (swelled portion) 23a of thecoating liquid 23 may come into contact with the workpiece 21. However, by adjusting the gap G as described above, it is possible to suppress the occurrence of coating unevenness due to the variation in the wet thickness of the coating film 25 caused by this contact.
Furthermore, it is possible to suppress the occurrence of coating unevenness caused by thecoating liquid 23 being interrupted, which is generated when the gap G is too large.
Moreover, compared to the case ofPatent Document 1 in which the slot width needs to be reduced so that the coating liquid 23 is ejected straight and in the form of a film from the discharge port 3aa, there is a bulging portion 23a and an extending portion 23b. Since it becomes possible to discharge the coating liquid 23 by increasing the slot width so as to weaken the momentum of discharging the coating liquid 23 to the extent obtained, the variation in the wet thickness of the coating film 25 occurs accordingly. Can be suppressed.
Thus, the coating unevenness caused by the gap G being too small, or the coating unevenness caused by thecoating liquid 23 colliding with the workpiece 21 with a large gap G can be suppressed.
Therefore, it is possible to obtain thecoating film 25 in which deterioration in quality due to coating unevenness is suppressed.
また、近接塗工よりもギャップGは大きいものの、その大きさが十分でないと塗工液23の膨らんだ部分(膨出部分)23aが被塗工物21に接触するおそれがある。しかし、上記のようにギャップGを調整することによって、この接触によって生じる、塗工膜25のウェット厚みのバラツキに起因する塗工ムラの発生を、抑制し得る。
さらに、ギャップGが大き過ぎることによって生じる、塗工液23が途切れることに起因する塗工ムラの発生を抑制し得る。
しかも、吐出口3aaから真っ直ぐ且つ膜状に塗工液23を噴出させるべくスロット幅を小さくする必要がある特許文献1の場合と比較して、膨出部分23aと延在部分23bとが存在し得る程度に塗工液23を吐出する勢いを弱めるべくスロット幅を大きくして塗工液23を吐出することが可能となるため、その分、塗工膜25のウェット厚みのバラツキが発生することを、抑制し得る。
このように、ギャップがG小さ過ぎることに起因する塗工ムラや、ギャップGは大きいものの勢いよく塗工液23が被塗工物21に衝突することに起因する塗工ムラを抑制し得る。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を得ることが可能となる。 According to such a configuration, the gap G is larger than that of the conventional proximity coating as shown in FIG. 8, so that it is possible to suppress the occurrence of coating unevenness due to the gap G being too small.
Further, although the gap G is larger than that of the proximity coating, if the size is not sufficient, the swelled portion (swelled portion) 23a of the
Furthermore, it is possible to suppress the occurrence of coating unevenness caused by the
Moreover, compared to the case of
Thus, the coating unevenness caused by the gap G being too small, or the coating unevenness caused by the
Therefore, it is possible to obtain the
本実施形態の塗工膜形成方法においては、前記所定の伸長度が2mm以上であることが好ましい。
伸長度が2mm以上である塗工液を用いることによって、塗工液23が十分に伸び易くなるため、被塗工物21に接触しないように膨出部分23aを形成し易くなり、また、途切れることなく延在部分23bを形成し易くなる。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を、より確実に得ることが可能となる。 In the coating film forming method of this embodiment, it is preferable that the predetermined elongation is 2 mm or more.
By using a coating liquid having an extension degree of 2 mm or more, thecoating liquid 23 can be sufficiently stretched, so that it is easy to form the bulging portion 23 a so as not to contact the workpiece 21, and it is interrupted. It becomes easy to form the extending part 23b without.
Therefore, it is possible to more reliably obtain thecoating film 25 in which the deterioration in quality due to the coating unevenness is suppressed.
伸長度が2mm以上である塗工液を用いることによって、塗工液23が十分に伸び易くなるため、被塗工物21に接触しないように膨出部分23aを形成し易くなり、また、途切れることなく延在部分23bを形成し易くなる。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を、より確実に得ることが可能となる。 In the coating film forming method of this embodiment, it is preferable that the predetermined elongation is 2 mm or more.
By using a coating liquid having an extension degree of 2 mm or more, the
Therefore, it is possible to more reliably obtain the
本実施形態の塗工膜形成方法においては、前記被塗工物21と前記吐出口3aaとの間のギャップGを、0.5~2mmとすることが好ましい。
上記ギャップGを0.5mm以上とすることによって、塗工膜25の外観不良、特に点欠点を、より抑制することができ、ギャップGを2mm以下とすることによって、巻取り不良(耳高)を、より抑制し得る。 In the coating film forming method of the present embodiment, the gap G between thecoating object 21 and the discharge port 3aa is preferably set to 0.5 to 2 mm.
By setting the gap G to 0.5 mm or more, it is possible to further suppress appearance defects, particularly point defects, of thecoating film 25. By setting the gap G to 2 mm or less, winding failure (ear height) Can be further suppressed.
上記ギャップGを0.5mm以上とすることによって、塗工膜25の外観不良、特に点欠点を、より抑制することができ、ギャップGを2mm以下とすることによって、巻取り不良(耳高)を、より抑制し得る。 In the coating film forming method of the present embodiment, the gap G between the
By setting the gap G to 0.5 mm or more, it is possible to further suppress appearance defects, particularly point defects, of the
本実施形態の塗工膜形成方法においては、前記吐出口3aaの間隔(スロット幅)を、0.05~1.5mmとすることが好ましい。
ここで、吐出口3aaの間隔が小さ過ぎると、スロット8の加工精度のバラツキが塗工膜25のウェット厚みのバラツキに及ぼす悪影響が大きくなり過ぎ、そのバラツキが許容できないものとなるおそれがあり、吐出口3aaの間隔が大き過ぎると、ダイの内圧が低下してダイ内部で幅方向に塗工液23を均一に分配できず、塗工膜25のウェット厚みのバラツキが許容できなくなるおそれがある。
しかし、吐出口3aaの間隔を0.05mm以上とすることによって、スロット8の加工精度のバラツキが塗工膜25のウェット厚みに及ぼす悪影響を小さくすることができる。また、吐出口3aaの間隔を1.5mm以下とすることによって、ダイの内圧の低下を抑制してダイ内部で幅方向に塗工液23をより均一に分配することができるため、塗工膜25のウェット厚みのバラツキを抑制することができる。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を、より確実に得ることが可能となる。 In the coating film forming method of the present embodiment, it is preferable that the interval (slot width) of the discharge ports 3aa is 0.05 to 1.5 mm.
Here, if the interval between the discharge ports 3aa is too small, the variation in the processing accuracy of theslot 8 may have an adverse effect on the variation in the wet thickness of the coating film 25, and the variation may be unacceptable. If the interval between the discharge ports 3aa is too large, the internal pressure of the die is lowered, and the coating liquid 23 cannot be uniformly distributed in the width direction inside the die, and there is a possibility that the variation in the wet thickness of the coating film 25 cannot be allowed. .
However, by setting the interval between the discharge ports 3aa to 0.05 mm or more, the adverse effect of the variation in the processing accuracy of theslot 8 on the wet thickness of the coating film 25 can be reduced. In addition, since the interval between the discharge ports 3aa is 1.5 mm or less, it is possible to more uniformly distribute the coating liquid 23 in the width direction inside the die while suppressing a decrease in the internal pressure of the die. 25 variation in wet thickness can be suppressed.
Therefore, it is possible to more reliably obtain thecoating film 25 in which the deterioration in quality due to the coating unevenness is suppressed.
ここで、吐出口3aaの間隔が小さ過ぎると、スロット8の加工精度のバラツキが塗工膜25のウェット厚みのバラツキに及ぼす悪影響が大きくなり過ぎ、そのバラツキが許容できないものとなるおそれがあり、吐出口3aaの間隔が大き過ぎると、ダイの内圧が低下してダイ内部で幅方向に塗工液23を均一に分配できず、塗工膜25のウェット厚みのバラツキが許容できなくなるおそれがある。
しかし、吐出口3aaの間隔を0.05mm以上とすることによって、スロット8の加工精度のバラツキが塗工膜25のウェット厚みに及ぼす悪影響を小さくすることができる。また、吐出口3aaの間隔を1.5mm以下とすることによって、ダイの内圧の低下を抑制してダイ内部で幅方向に塗工液23をより均一に分配することができるため、塗工膜25のウェット厚みのバラツキを抑制することができる。
従って、塗工ムラに起因する品質低下が抑制された塗工膜25を、より確実に得ることが可能となる。 In the coating film forming method of the present embodiment, it is preferable that the interval (slot width) of the discharge ports 3aa is 0.05 to 1.5 mm.
Here, if the interval between the discharge ports 3aa is too small, the variation in the processing accuracy of the
However, by setting the interval between the discharge ports 3aa to 0.05 mm or more, the adverse effect of the variation in the processing accuracy of the
Therefore, it is possible to more reliably obtain the
以上の通り、本実施形態によれば、塗工ムラによる品質低下が抑制された塗工膜形成方法が提供される。
As described above, according to the present embodiment, a coating film forming method in which deterioration in quality due to coating unevenness is suppressed is provided.
本実施形態の塗工膜形成方法は、上記の通りであるが、本発明は、上記実施形態に限定されず、本発明の意図する範囲内において適宜設計変更されることが可能である。
The coating film forming method of the present embodiment is as described above, but the present invention is not limited to the above-described embodiment, and can be appropriately modified within the intended scope of the present invention.
次に実施例を挙げて本発明を更に詳しく説明するが、本発明はこれらに限定されるものではない。なお、以下において、特に規定のない限り、測定環境条件は全て23℃50%RHである。
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. In the following, unless otherwise specified, all measurement environmental conditions are 23 ° C. and 50% RH.
(使用材料)
・被塗工物:ポリエチレンテレフタレート(PET)フィルム(商品名:ダイヤホイール、 三菱樹脂社製)
・塗工液:アクリルポリマー溶液A~H(表1参照)、溶媒:トルエン、酢酸エチル (Materials used)
・ Coating object: Polyethylene terephthalate (PET) film (Product name: Diamond wheel, manufactured by Mitsubishi Plastics)
-Coating solution: Acrylic polymer solutions A to H (see Table 1), Solvent: Toluene, Ethyl acetate
・被塗工物:ポリエチレンテレフタレート(PET)フィルム(商品名:ダイヤホイール、 三菱樹脂社製)
・塗工液:アクリルポリマー溶液A~H(表1参照)、溶媒:トルエン、酢酸エチル (Materials used)
・ Coating object: Polyethylene terephthalate (PET) film (Product name: Diamond wheel, manufactured by Mitsubishi Plastics)
-Coating solution: Acrylic polymer solutions A to H (see Table 1), Solvent: Toluene, Ethyl acetate
(密度の測定方法)
コリオリ式流量計(プロマス83F、エンドレスハウザー社製)の密度測定機能を用いることによって、塗工液の密度を測定した。 (Density measurement method)
The density of the coating solution was measured by using the density measuring function of a Coriolis flow meter (Promass 83F, manufactured by Endless Hauser).
コリオリ式流量計(プロマス83F、エンドレスハウザー社製)の密度測定機能を用いることによって、塗工液の密度を測定した。 (Density measurement method)
The density of the coating solution was measured by using the density measuring function of a Coriolis flow meter (Promass 83F, manufactured by Endless Hauser).
(粘度の測定方法)
治具(コーンの直径が25~50mm、コーンの角度が0.5~2°であるコーンプレート)を備えたレオメータ(MCR302、冶具:直径50mm、角度1°のコーンプレート、Anton Paar社製)を用い、21~25℃の温度条件下で、せん断速度1(1/s)の条件で、塗工液の粘度を測定した。 (Measurement method of viscosity)
Rheometer (MCR302, jig: cone plate with a diameter of 50 mm,angle 1 °, manufactured by Anton Paar) equipped with a jig (cone plate with a cone diameter of 25-50 mm and a cone angle of 0.5-2 °) Was used to measure the viscosity of the coating solution at a temperature of 21 to 25 ° C. and a shear rate of 1 (1 / s).
治具(コーンの直径が25~50mm、コーンの角度が0.5~2°であるコーンプレート)を備えたレオメータ(MCR302、冶具:直径50mm、角度1°のコーンプレート、Anton Paar社製)を用い、21~25℃の温度条件下で、せん断速度1(1/s)の条件で、塗工液の粘度を測定した。 (Measurement method of viscosity)
Rheometer (MCR302, jig: cone plate with a diameter of 50 mm,
(伸長度の測定方法)
前述した図3に示すように、内径2mmの円筒部材(伸長度の測定用の円筒部材)の開口から、該開口から1mm離れた位置にて30m/minの回転速度で回転するロール(伸長度の測定用のロール)に、塗工液23を5g/minの速度で吐出させ、円筒部材の開口とロールとの間隔(測定ギャップD)を1mmから大きくしていったとき、開口とロールとを結んでいる塗工液23が切断された際の上記開口とロールとの間隔を表す数値(mm)を測定した。測定の際、塗工液23の温度は、23℃±2℃に設定した。 (Measurement method of elongation)
As shown in FIG. 3 described above, a roll (extension degree) that rotates at a rotational speed of 30 m / min at aposition 1 mm away from the opening of a cylindrical member (cylindrical member for measuring extension) having an inner diameter of 2 mm. When the coating liquid 23 is discharged at a speed of 5 g / min and the distance between the opening of the cylindrical member and the roll (measurement gap D) is increased from 1 mm, the opening and the roll A numerical value (mm) representing the distance between the opening and the roll when the coating solution 23 tying was cut. During the measurement, the temperature of the coating solution 23 was set to 23 ° C. ± 2 ° C.
前述した図3に示すように、内径2mmの円筒部材(伸長度の測定用の円筒部材)の開口から、該開口から1mm離れた位置にて30m/minの回転速度で回転するロール(伸長度の測定用のロール)に、塗工液23を5g/minの速度で吐出させ、円筒部材の開口とロールとの間隔(測定ギャップD)を1mmから大きくしていったとき、開口とロールとを結んでいる塗工液23が切断された際の上記開口とロールとの間隔を表す数値(mm)を測定した。測定の際、塗工液23の温度は、23℃±2℃に設定した。 (Measurement method of elongation)
As shown in FIG. 3 described above, a roll (extension degree) that rotates at a rotational speed of 30 m / min at a
(実験例1)
上記材料を用い、下記及び表1の条件で被塗工物に塗工液を吐出し、下記の方法で塗工状態を調べた。結果を、表1に示す。また、ギャップが1.0mmの場合における塗工状態についての結果を図4に示し、ギャップが0.2mmの場合における塗工状態についての結果を図5に示し、ギャップが5.0mmの場合における塗工状態についての結果を図6及び図7に示す。 (Experimental example 1)
Using the above materials, the coating solution was discharged onto the article to be coated under the conditions described below and in Table 1, and the coating state was examined by the following method. The results are shown in Table 1. Moreover, the result about the coating state in case a gap is 1.0 mm is shown in FIG. 4, the result about the coating state in case a gap is 0.2 mm is shown in FIG. The result about a coating state is shown in FIG.6 and FIG.7.
上記材料を用い、下記及び表1の条件で被塗工物に塗工液を吐出し、下記の方法で塗工状態を調べた。結果を、表1に示す。また、ギャップが1.0mmの場合における塗工状態についての結果を図4に示し、ギャップが0.2mmの場合における塗工状態についての結果を図5に示し、ギャップが5.0mmの場合における塗工状態についての結果を図6及び図7に示す。 (Experimental example 1)
Using the above materials, the coating solution was discharged onto the article to be coated under the conditions described below and in Table 1, and the coating state was examined by the following method. The results are shown in Table 1. Moreover, the result about the coating state in case a gap is 1.0 mm is shown in FIG. 4, the result about the coating state in case a gap is 0.2 mm is shown in FIG. The result about a coating state is shown in FIG.6 and FIG.7.
(塗工条件)
・塗工液の吐出量(流束):4.2×10-5m2/s
・スロット幅:0.6mm
・被塗工物の移動速度:25m/min
・塗工部の下流側リップ部の長さ:1.0mm
・塗工膜のウェット厚み:100μm
・塗工幅:150mm
・被塗工物と吐出口との距離(ギャップ):0.2~5.0mm (Coating conditions)
・ Discharge rate (flux) of coating liquid: 4.2 × 10 −5 m 2 / s
・ Slot width: 0.6mm
・ Movement speed of workpiece: 25 m / min
・ Length of downstream lip of coating part: 1.0mm
-Wet thickness of coating film: 100 μm
・ Coating width: 150mm
-Distance (gap) between the object to be coated and the discharge port: 0.2 to 5.0 mm
・塗工液の吐出量(流束):4.2×10-5m2/s
・スロット幅:0.6mm
・被塗工物の移動速度:25m/min
・塗工部の下流側リップ部の長さ:1.0mm
・塗工膜のウェット厚み:100μm
・塗工幅:150mm
・被塗工物と吐出口との距離(ギャップ):0.2~5.0mm (Coating conditions)
・ Discharge rate (flux) of coating liquid: 4.2 × 10 −5 m 2 / s
・ Slot width: 0.6mm
・ Movement speed of workpiece: 25 m / min
・ Length of downstream lip of coating part: 1.0mm
-Wet thickness of coating film: 100 μm
・ Coating width: 150mm
-Distance (gap) between the object to be coated and the discharge port: 0.2 to 5.0 mm
(塗工膜のウェット厚みの測定方法)
分光干渉厚み計(Si-T、キーエンス社製)を用い、インラインで塗工膜のウェット厚みを測定した。 (Measurement method of wet thickness of coating film)
The wet thickness of the coating film was measured in-line using a spectral interference thickness meter (Si-T, manufactured by Keyence Corporation).
分光干渉厚み計(Si-T、キーエンス社製)を用い、インラインで塗工膜のウェット厚みを測定した。 (Measurement method of wet thickness of coating film)
The wet thickness of the coating film was measured in-line using a spectral interference thickness meter (Si-T, manufactured by Keyence Corporation).
(塗工状態の評価)
・膨出部分及び延在部分の形成の有無
塗工部と被塗工物との間において塗工部から吐出されている塗工液を目視にて観察することによって、吐出された塗工液において膨出部分及び延在部分が形成されているか否かを調べ、下記のようにして評価した。
○:膨出部分及び延在部分が形成されており、塗工状態が良好である。
△:ビードは形成されたものの、膨出部分及及び延在部分は形成されておらず、いわゆる近接塗工の状態になっている。
*:膨出部分となるべき領域が被塗工物と接触していることからビードが形成されておらず、塗工状態が不良である。
×:塗工液が下方に垂れていることからビードが形成されておらず、よって、塗工することができず、塗工状態が不良である。 (Evaluation of coating state)
-Existence of formation of bulging part and extension part Discharged coating liquid by visually observing the coating liquid discharged from the coated part between the coated part and the object to be coated Whether or not the bulging portion and the extending portion were formed was examined and evaluated as follows.
○: A bulging portion and an extending portion are formed, and the coating state is good.
Δ: A bead was formed, but a bulging portion and an extending portion were not formed, and a so-called proximity coating state was obtained.
*: Since the area | region which should become a bulging part is contacting the to-be-coated object, the bead is not formed and the coating state is unsatisfactory.
X: The bead is not formed because the coating liquid hangs down, and therefore, the coating cannot be performed and the coating state is poor.
・膨出部分及び延在部分の形成の有無
塗工部と被塗工物との間において塗工部から吐出されている塗工液を目視にて観察することによって、吐出された塗工液において膨出部分及び延在部分が形成されているか否かを調べ、下記のようにして評価した。
○:膨出部分及び延在部分が形成されており、塗工状態が良好である。
△:ビードは形成されたものの、膨出部分及及び延在部分は形成されておらず、いわゆる近接塗工の状態になっている。
*:膨出部分となるべき領域が被塗工物と接触していることからビードが形成されておらず、塗工状態が不良である。
×:塗工液が下方に垂れていることからビードが形成されておらず、よって、塗工することができず、塗工状態が不良である。 (Evaluation of coating state)
-Existence of formation of bulging part and extension part Discharged coating liquid by visually observing the coating liquid discharged from the coated part between the coated part and the object to be coated Whether or not the bulging portion and the extending portion were formed was examined and evaluated as follows.
○: A bulging portion and an extending portion are formed, and the coating state is good.
Δ: A bead was formed, but a bulging portion and an extending portion were not formed, and a so-called proximity coating state was obtained.
*: Since the area | region which should become a bulging part is contacting the to-be-coated object, the bead is not formed and the coating state is unsatisfactory.
X: The bead is not formed because the coating liquid hangs down, and therefore, the coating cannot be performed and the coating state is poor.
・被塗工物に塗工された固化される前の塗工液の外観状態
被塗工物に塗工され、固化される前の塗工液(ウェット状態の塗工膜)を目視にて観察することによって、該塗工液の外観状態を調べ、下記のようにして評価した。
◎:被塗工物に塗工された固化される前の塗工液に外観不良が発生しておらず、その外観が非常に良好である。
○:被塗工物に塗工された固化される前の塗工液に巻き取り不可能な程度の外観不良(両端部が盛り上がる、いわゆる耳高)が発生しておらず、点欠点、スジ、ムラといったその他の外観不良も発生しておらず、その外観が良好である。
△:被塗工物に塗工された固化される前の塗工液に外観不良(点欠点)が発生しており、その外観が不良である。
*:被塗工物に塗工された固化される前の塗工液に外観不良(スジ、ムラ)が発生しており、その外観が不良である。
×:被塗工物に塗工された固化される前の塗工液に巻き取り不可能な程度の外観不良(耳高)が発生しており、その外観が不良である。
-:塗工液が被塗工物に到達しないことから塗工膜が形成されない。 -Appearance state of the coating liquid before being solidified applied to the object to be coated Visually observe the coating liquid (wet state coating film) before being applied to the object and solidified By observing, the appearance state of the coating solution was examined and evaluated as follows.
(Double-circle): The external appearance defect has not generate | occur | produced in the coating liquid before solidifying applied to the to-be-coated article, and the external appearance is very favorable.
○: Appearance defects (so-called ear heights at which both ends rise) that cannot be wound up in the coating solution before solidification applied to the object to be coated have not occurred, point defects, streaks Other appearance defects such as unevenness are not generated, and the appearance is good.
(Triangle | delta): The external appearance defect (point defect) has generate | occur | produced in the coating liquid before solidifying applied to the to-be-coated article, and the external appearance is unsatisfactory.
*: Appearance defects (streaks, unevenness) have occurred in the coating liquid before solidification applied to the object to be coated, and the appearance is poor.
X: Appearance defects (ear heights) that cannot be wound up are generated in the coating liquid before solidification applied to the object to be coated, and the appearance is poor.
-: The coating film does not form because the coating liquid does not reach the workpiece.
被塗工物に塗工され、固化される前の塗工液(ウェット状態の塗工膜)を目視にて観察することによって、該塗工液の外観状態を調べ、下記のようにして評価した。
◎:被塗工物に塗工された固化される前の塗工液に外観不良が発生しておらず、その外観が非常に良好である。
○:被塗工物に塗工された固化される前の塗工液に巻き取り不可能な程度の外観不良(両端部が盛り上がる、いわゆる耳高)が発生しておらず、点欠点、スジ、ムラといったその他の外観不良も発生しておらず、その外観が良好である。
△:被塗工物に塗工された固化される前の塗工液に外観不良(点欠点)が発生しており、その外観が不良である。
*:被塗工物に塗工された固化される前の塗工液に外観不良(スジ、ムラ)が発生しており、その外観が不良である。
×:被塗工物に塗工された固化される前の塗工液に巻き取り不可能な程度の外観不良(耳高)が発生しており、その外観が不良である。
-:塗工液が被塗工物に到達しないことから塗工膜が形成されない。 -Appearance state of the coating liquid before being solidified applied to the object to be coated Visually observe the coating liquid (wet state coating film) before being applied to the object and solidified By observing, the appearance state of the coating solution was examined and evaluated as follows.
(Double-circle): The external appearance defect has not generate | occur | produced in the coating liquid before solidifying applied to the to-be-coated article, and the external appearance is very favorable.
○: Appearance defects (so-called ear heights at which both ends rise) that cannot be wound up in the coating solution before solidification applied to the object to be coated have not occurred, point defects, streaks Other appearance defects such as unevenness are not generated, and the appearance is good.
(Triangle | delta): The external appearance defect (point defect) has generate | occur | produced in the coating liquid before solidifying applied to the to-be-coated article, and the external appearance is unsatisfactory.
*: Appearance defects (streaks, unevenness) have occurred in the coating liquid before solidification applied to the object to be coated, and the appearance is poor.
X: Appearance defects (ear heights) that cannot be wound up are generated in the coating liquid before solidification applied to the object to be coated, and the appearance is poor.
-: The coating film does not form because the coating liquid does not reach the workpiece.
その結果、表1及び図4に示すように、ギャップ内において、塗工液が膨出部分と延在部分とを有する場合には、塗工不良が観察されなかった。
As a result, as shown in Table 1 and FIG. 4, when the coating liquid had a bulging portion and an extending portion in the gap, no coating failure was observed.
表1、図6及び図7に示すように、ギャップが5.0mmである場合には、塗工液が吐出口と被塗工物とを結ぶことができず、塗工液が途切れたため、塗工膜が形成されなかった。
As shown in Table 1, FIG. 6 and FIG. 7, when the gap is 5.0 mm, the coating liquid cannot connect the discharge port and the object to be coated, and the coating liquid is interrupted. A coating film was not formed.
表1及び図5に示すように、ギャップが0.2mmである場合には、近接塗工の状態となり、外観不良(点欠点)が発生した。アクリルポリマー溶液D、E、Fでは、ギャップが0.5mmである場合に、吐出口と被塗工物とを結ぶ塗工液が、膨らんだような部分と延在部分とを有するものの、膨らんだような部分が被塗工物に接触し、膨出部分が形成されなかった。
As shown in Table 1 and FIG. 5, when the gap was 0.2 mm, it was in the state of proximity coating, and appearance defects (point defects) occurred. In the acrylic polymer solutions D, E, and F, when the gap is 0.5 mm, the coating liquid that connects the discharge port and the object to be coated has a bulging portion and an extending portion, but the bulging Such a portion contacted the object to be coated, and no bulging portion was formed.
また、ギャップが2.5mmであり、耳高の外観不良が発生した試料について、被塗工物に塗工された塗工液を固化させた後、被塗工物を巻き取ると、巻ずれが発生し、良好に巻き取ることができなかった。この結果、ギャップが2.5mm以上になると、耳高の外観不良が発生し、巻き取り不良が生じ得ることがわかった。
In addition, for a sample having a gap of 2.5 mm and an appearance defect with a high ear height, the coating liquid applied to the object to be coated was solidified, and then the object to be wound was wound. Occurred and could not be wound well. As a result, it was found that when the gap was 2.5 mm or more, an appearance defect with a high height occurred and a winding failure could occur.
(実験例2)
実験例1のアクリルポリマー溶液D、G(表1参照)を用い、スロット幅を0.3mm、1.2mmに変更すること以外は実験例1と同様にして、被塗工物に塗工液を塗工し、塗工状態を評価した。結果を表2に示す。なお、表2において、アクリルポリマー溶液D、Gにおいて、スロット幅が0.6mmである場合の結果は、実験例1での結果を転記した。 (Experimental example 2)
Using the acrylic polymer solutions D and G of Experimental Example 1 (see Table 1) and changing the slot width to 0.3 mm and 1.2 mm, the coating liquid was applied to the object to be coated in the same manner as Experimental Example 1. The coating state was evaluated. The results are shown in Table 2. In Table 2, in the acrylic polymer solutions D and G, the result in the case of the slot width of 0.6 mm is the result of the experiment example 1.
実験例1のアクリルポリマー溶液D、G(表1参照)を用い、スロット幅を0.3mm、1.2mmに変更すること以外は実験例1と同様にして、被塗工物に塗工液を塗工し、塗工状態を評価した。結果を表2に示す。なお、表2において、アクリルポリマー溶液D、Gにおいて、スロット幅が0.6mmである場合の結果は、実験例1での結果を転記した。 (Experimental example 2)
Using the acrylic polymer solutions D and G of Experimental Example 1 (see Table 1) and changing the slot width to 0.3 mm and 1.2 mm, the coating liquid was applied to the object to be coated in the same manner as Experimental Example 1. The coating state was evaluated. The results are shown in Table 2. In Table 2, in the acrylic polymer solutions D and G, the result in the case of the slot width of 0.6 mm is the result of the experiment example 1.
(実験例3)
実験例1のアクリルポリマー溶液D(表1参照)を用い、ギャップが1.5mmである場合において、下流側リップ部の長さを0.5mm、1.5mmに変更すること以外は実験例1と同様にして、被塗工物に塗工液を塗工し、塗工状態を評価した。結果を、表3に示す。なお、表3において、下流側リップ部の長さが1.0mmである場合の結果は、実験例1での結果を転記した。 (Experimental example 3)
Experimental Example 1 except that the length of the downstream lip is changed to 0.5 mm and 1.5 mm when the acrylic polymer solution D of Experimental Example 1 (see Table 1) is used and the gap is 1.5 mm. In the same manner as described above, the coating liquid was applied to the object to be coated, and the coating state was evaluated. The results are shown in Table 3. In Table 3, the result in Experimental Example 1 is transcribed as the result when the length of the downstream lip portion is 1.0 mm.
実験例1のアクリルポリマー溶液D(表1参照)を用い、ギャップが1.5mmである場合において、下流側リップ部の長さを0.5mm、1.5mmに変更すること以外は実験例1と同様にして、被塗工物に塗工液を塗工し、塗工状態を評価した。結果を、表3に示す。なお、表3において、下流側リップ部の長さが1.0mmである場合の結果は、実験例1での結果を転記した。 (Experimental example 3)
Experimental Example 1 except that the length of the downstream lip is changed to 0.5 mm and 1.5 mm when the acrylic polymer solution D of Experimental Example 1 (see Table 1) is used and the gap is 1.5 mm. In the same manner as described above, the coating liquid was applied to the object to be coated, and the coating state was evaluated. The results are shown in Table 3. In Table 3, the result in Experimental Example 1 is transcribed as the result when the length of the downstream lip portion is 1.0 mm.
表3に示すように、下流側リップ部の長さを変更しても、膨出部分及び延在部分を形成することができ、塗工不良も観察されなかった。
As shown in Table 3, even if the length of the downstream lip portion was changed, the bulging portion and the extending portion could be formed, and no coating failure was observed.
(参考例1)
下記表4に示されるように、特許文献1の無次元数Mが0.2よりも大きくなるように(M=(ρ・U・hw2)/(μ・d)>0.2)塗工液を選択し、表4及び下記に示すように各条件を設定した。設定した各条件で下記被塗工物に対して塗工を行ったところ、塗工液が垂れて塗工することができなかった。 (Reference Example 1)
As shown in Table 4 below, coating is performed so that the dimensionless number M inPatent Document 1 is larger than 0.2 (M = (ρ · U · hw2) / (μ · d)> 0.2). A liquid was selected, and each condition was set as shown in Table 4 and below. When coating was performed on the following coated objects under each set condition, the coating liquid was dripping and could not be coated.
下記表4に示されるように、特許文献1の無次元数Mが0.2よりも大きくなるように(M=(ρ・U・hw2)/(μ・d)>0.2)塗工液を選択し、表4及び下記に示すように各条件を設定した。設定した各条件で下記被塗工物に対して塗工を行ったところ、塗工液が垂れて塗工することができなかった。 (Reference Example 1)
As shown in Table 4 below, coating is performed so that the dimensionless number M in
・被塗工物:ポリエチレンテレフタレート(PET)フィルム(商品名:ダイヤホイール、三菱樹脂社製)
・ Coating object: Polyethylene terephthalate (PET) film (trade name: Diamond wheel, manufactured by Mitsubishi Plastics)
・塗工液(1):アクリル系ポリマー溶液、溶媒:トルエン、酢酸エチル
ポリマー平均重量分子量:約80万
ポリマー濃度:2.6wt%
(塗工条件)
塗工液の吐出量(流束):5.0×10-6~1.0×10-4m2/s
スロット幅:19~25μm
被塗工物の移動速度:25m/min
塗工部の下流側リップ部の長さ:1.0mm
塗工膜のウェット厚み:10~200μm
塗工幅:150mm
被塗工物と吐出口との距離(ギャップ):0.5mm -Coating liquid (1): acrylic polymer solution, solvent: toluene, ethyl acetate Polymer average weight molecular weight: about 800,000 Polymer concentration: 2.6 wt%
(Coating conditions)
Coating liquid discharge rate (flux): 5.0 × 10 −6 to 1.0 × 10 −4 m 2 / s
Slot width: 19-25μm
Movement speed of the object to be coated: 25 m / min
Length of downstream lip of coating part: 1.0mm
Wet thickness of coating film: 10-200μm
Coating width: 150mm
Distance (gap) between workpiece and discharge port: 0.5mm
ポリマー平均重量分子量:約80万
ポリマー濃度:2.6wt%
(塗工条件)
塗工液の吐出量(流束):5.0×10-6~1.0×10-4m2/s
スロット幅:19~25μm
被塗工物の移動速度:25m/min
塗工部の下流側リップ部の長さ:1.0mm
塗工膜のウェット厚み:10~200μm
塗工幅:150mm
被塗工物と吐出口との距離(ギャップ):0.5mm -Coating liquid (1): acrylic polymer solution, solvent: toluene, ethyl acetate Polymer average weight molecular weight: about 800,000 Polymer concentration: 2.6 wt%
(Coating conditions)
Coating liquid discharge rate (flux): 5.0 × 10 −6 to 1.0 × 10 −4 m 2 / s
Slot width: 19-25μm
Movement speed of the object to be coated: 25 m / min
Length of downstream lip of coating part: 1.0mm
Wet thickness of coating film: 10-200μm
Coating width: 150mm
Distance (gap) between workpiece and discharge port: 0.5mm
・塗工液(2):グリセリン水溶液、溶媒:水
グリセリン濃度:60wt%
(塗工条件)
塗工液の吐出量(流束):8.3×10-6~1.33×10-4m2/s
スロット幅:19~75μm
被塗工物の移動速度:25m/min
塗工部の下流側リップ部の長さ:1.0mm
塗工膜のウェット厚み:5~80μm
塗工幅:150mm
被塗工物と吐出口との距離(ギャップ):0.5mm -Coating liquid (2): Glycerin aqueous solution, Solvent: Water Glycerin concentration: 60 wt%
(Coating conditions)
Coating liquid discharge rate (flux): 8.3 × 10 −6 to 1.33 × 10 −4 m 2 / s
Slot width: 19-75μm
Movement speed of the object to be coated: 25 m / min
Length of downstream lip of coating part: 1.0mm
Wet thickness of coating film: 5-80μm
Coating width: 150mm
Distance (gap) between workpiece and discharge port: 0.5mm
グリセリン濃度:60wt%
(塗工条件)
塗工液の吐出量(流束):8.3×10-6~1.33×10-4m2/s
スロット幅:19~75μm
被塗工物の移動速度:25m/min
塗工部の下流側リップ部の長さ:1.0mm
塗工膜のウェット厚み:5~80μm
塗工幅:150mm
被塗工物と吐出口との距離(ギャップ):0.5mm -Coating liquid (2): Glycerin aqueous solution, Solvent: Water Glycerin concentration: 60 wt%
(Coating conditions)
Coating liquid discharge rate (flux): 8.3 × 10 −6 to 1.33 × 10 −4 m 2 / s
Slot width: 19-75μm
Movement speed of the object to be coated: 25 m / min
Length of downstream lip of coating part: 1.0mm
Wet thickness of coating film: 5-80μm
Coating width: 150mm
Distance (gap) between workpiece and discharge port: 0.5mm
以上のように本発明の実施の形態及び実施例について説明を行なったが、各実施の形態及び実施例の特徴を適宜組み合わせることも当初から予定している。また、今回開示された実施の形態及び実施例はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した実施の形態及び実施例ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。
Although the embodiments and examples of the present invention have been described as described above, it is also planned from the beginning to appropriately combine the features of the embodiments and examples. The embodiments and examples disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the embodiments and examples described above but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.
1:塗工装置、3:塗工部、3a:先端部、3aa:吐出口、5:第1のダイブロック、7:第2のダイブロック、7a:下流側リップ部、8:スロット、13:固化部、15:支持部、21:被塗工物、23:塗工液、25:塗工膜
1: coating device, 3: coating part, 3a: tip part, 3aa: discharge port, 5: first die block, 7: second die block, 7a: downstream lip part, 8: slot, 13 : Solidification part, 15: support part, 21: article to be coated, 23: coating liquid, 25: coating film
1: coating device, 3: coating part, 3a: tip part, 3aa: discharge port, 5: first die block, 7: second die block, 7a: downstream lip part, 8: slot, 13 : Solidification part, 15: support part, 21: article to be coated, 23: coating liquid, 25: coating film
Claims (5)
- 塗工液を吐出する吐出口を有し、該吐出口に対して相対的に移動している被塗工物に、前記吐出口から前記塗工液を吐出して塗工する塗工装置を用いて、前記被塗工物に前記塗工液を塗工して塗工膜を形成する塗工膜形成方法であって、
前記塗工液として所定の伸長度を有するものを用い、前記吐出口から前記被塗工物に前記塗工液が吐出されているとき、前記吐出口側において膨らんでいる膨出部分と、該膨出部分から前記被塗工物まで先細りとなるように前記被塗工物の移動方向下流側に延びている延在部分とを有するビードを形成しつつ前記吐出口と前記被塗工物とを結ぶ状態を維持しながら前記被塗工物に前記塗工液を塗工し、且つ、
前記膨出部分の大きさに応じて、前記膨出部分が前記被塗工物に接触しないように前記吐出口と前記被塗工物との間のギャップを調整して前記被塗工物に前記塗工液を塗工する、塗工膜形成方法。 A coating apparatus that has a discharge port for discharging a coating liquid, and discharges the coating liquid from the discharge port to be applied to an object to be moved relative to the discharge port. A coating film forming method of forming a coating film by applying the coating liquid to the object to be coated,
Using the coating liquid having a predetermined elongation, when the coating liquid is discharged from the discharge port to the coated object, a bulging portion that swells on the discharge port side, and Forming the bead having an extended portion extending downstream in the moving direction of the coated object so as to taper from the bulging portion to the coated object, and the discharge port and the coated object; Applying the coating liquid to the object to be coated while maintaining the state of tying, and
According to the size of the bulging portion, the gap between the discharge port and the coating object is adjusted so that the bulging portion does not contact the coating object. A method for forming a coating film, wherein the coating solution is applied. - 前記所定の伸長度が2mm以上である、請求項1に記載の塗工膜形成方法。 The coating film forming method according to claim 1, wherein the predetermined elongation is 2 mm or more.
- 前記被塗工物と前記吐出口との間隔を、0.5~2mmとする、請求項1または2に記載の塗工膜形成方法。 The coating film forming method according to claim 1 or 2, wherein an interval between the coating object and the discharge port is set to 0.5 to 2 mm.
- 前記吐出口の間隔を、0.05~1.5mmとする、請求項1または2に記載の塗工膜形成方法。 The coating film forming method according to claim 1 or 2, wherein an interval between the discharge ports is 0.05 to 1.5 mm.
- 前記吐出口の間隔を、0.05~1.5mmとする、請求項3に記載の塗工膜形成方法。
The coating film forming method according to claim 3, wherein the interval between the discharge ports is 0.05 to 1.5 mm.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201980033858.9A CN112154034B (en) | 2018-05-22 | 2019-05-22 | Coating film forming method |
KR1020207034553A KR20210015829A (en) | 2018-05-22 | 2019-05-22 | Coating film formation method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018-097673 | 2018-05-22 | ||
JP2018097673A JP6554580B1 (en) | 2018-05-22 | 2018-05-22 | Coating film forming method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019225648A1 true WO2019225648A1 (en) | 2019-11-28 |
Family
ID=67473323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/020272 WO2019225648A1 (en) | 2018-05-22 | 2019-05-22 | Method for forming coating film |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP6554580B1 (en) |
KR (1) | KR20210015829A (en) |
CN (1) | CN112154034B (en) |
TW (1) | TWI832860B (en) |
WO (1) | WO2019225648A1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11314233A (en) * | 1998-05-06 | 1999-11-16 | Teijin Ltd | Extrusion die |
JP2002301731A (en) * | 2001-04-04 | 2002-10-15 | Fuji Photo Film Co Ltd | Solution film forming method |
JP2003251644A (en) * | 2002-03-06 | 2003-09-09 | Konica Corp | Dope casting die |
JP2005104148A (en) * | 2003-09-11 | 2005-04-21 | Fuji Photo Film Co Ltd | Cellulose acylate film and solution film forming method |
JP2006188052A (en) * | 2004-12-09 | 2006-07-20 | Fuji Photo Film Co Ltd | Solution film forming method |
JP2008068616A (en) * | 2006-08-16 | 2008-03-27 | Fujifilm Corp | Casting die, solution deposition apparatus and solution deposition method |
JP2012115787A (en) * | 2010-12-02 | 2012-06-21 | Nitto Denko Corp | Method and apparatus for applying coating solution, and method for producing coated product |
JP2014000496A (en) * | 2012-06-15 | 2014-01-09 | Mitsubishi Rayon Co Ltd | Method for forming coating film |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10290946A (en) * | 1997-02-21 | 1998-11-04 | Konica Corp | Coating method and coating device |
WO2004013667A1 (en) * | 2002-08-02 | 2004-02-12 | Nitto Denko Corporation | Method for manufacturing polarizing film and polarizing film and optical film manufactured by using the method |
JP4390247B2 (en) * | 2003-04-25 | 2009-12-24 | 富士フイルム株式会社 | Solution casting method |
JP4358010B2 (en) * | 2004-03-25 | 2009-11-04 | 富士フイルム株式会社 | Coating apparatus and coating method |
JP2006297241A (en) * | 2005-04-19 | 2006-11-02 | Mejiro Precision:Kk | Slit coater and coating system using it |
TWI399276B (en) * | 2006-08-16 | 2013-06-21 | Fujifilm Corp | Casting device, solution casting apparatus, and solution casting method |
JP5831228B2 (en) * | 2009-05-09 | 2015-12-09 | コニカミノルタ株式会社 | Application method |
JP5346972B2 (en) * | 2011-03-30 | 2013-11-20 | 富士フイルム株式会社 | Method for producing film with coating |
JP5702223B2 (en) * | 2011-05-16 | 2015-04-15 | 武蔵エンジニアリング株式会社 | Film coating nozzle, coating apparatus and coating method |
US9333524B2 (en) * | 2013-03-15 | 2016-05-10 | Ricoh Company, Ltd. | Slot curtain coating apparatus and slot curtain coating method |
JP6140840B2 (en) * | 2013-12-27 | 2017-05-31 | 富士フイルム株式会社 | Dope composition, polarizing plate protective film, method for producing polarizing plate protective film, polarizing plate and liquid crystal display device |
CN107030948B (en) * | 2016-12-30 | 2019-03-19 | 桂林电器科学研究院有限公司 | Polyamic acid resin solution based on die head angle attaches lip wall and squeezes out salivation method |
-
2018
- 2018-05-22 JP JP2018097673A patent/JP6554580B1/en active Active
-
2019
- 2019-05-22 CN CN201980033858.9A patent/CN112154034B/en active Active
- 2019-05-22 WO PCT/JP2019/020272 patent/WO2019225648A1/en active Application Filing
- 2019-05-22 TW TW108117666A patent/TWI832860B/en active
- 2019-05-22 KR KR1020207034553A patent/KR20210015829A/en not_active Application Discontinuation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11314233A (en) * | 1998-05-06 | 1999-11-16 | Teijin Ltd | Extrusion die |
JP2002301731A (en) * | 2001-04-04 | 2002-10-15 | Fuji Photo Film Co Ltd | Solution film forming method |
JP2003251644A (en) * | 2002-03-06 | 2003-09-09 | Konica Corp | Dope casting die |
JP2005104148A (en) * | 2003-09-11 | 2005-04-21 | Fuji Photo Film Co Ltd | Cellulose acylate film and solution film forming method |
JP2006188052A (en) * | 2004-12-09 | 2006-07-20 | Fuji Photo Film Co Ltd | Solution film forming method |
JP2008068616A (en) * | 2006-08-16 | 2008-03-27 | Fujifilm Corp | Casting die, solution deposition apparatus and solution deposition method |
JP2012115787A (en) * | 2010-12-02 | 2012-06-21 | Nitto Denko Corp | Method and apparatus for applying coating solution, and method for producing coated product |
JP2014000496A (en) * | 2012-06-15 | 2014-01-09 | Mitsubishi Rayon Co Ltd | Method for forming coating film |
Also Published As
Publication number | Publication date |
---|---|
CN112154034A (en) | 2020-12-29 |
TWI832860B (en) | 2024-02-21 |
KR20210015829A (en) | 2021-02-10 |
JP2019202251A (en) | 2019-11-28 |
TW202003119A (en) | 2020-01-16 |
CN112154034B (en) | 2022-09-30 |
JP6554580B1 (en) | 2019-07-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS6380872A (en) | Coating method and apparatus | |
JP4846629B2 (en) | Curtain coating apparatus and curtain coating method | |
JPH01307471A (en) | Coating method | |
WO2019225647A1 (en) | Coating device, and method for manufacturing coating film | |
JPH02174965A (en) | Method and device for coating to double layers | |
JPH044071A (en) | Applying method | |
WO2019225648A1 (en) | Method for forming coating film | |
US9999898B2 (en) | Applicator and application method | |
JPH04190870A (en) | Coating method and apparatus | |
JP2006272269A (en) | Coating method for coating liquid and optical film | |
JP2003010765A (en) | Coating apparatus | |
JP2001170544A (en) | Coating applicator | |
JP2005034681A (en) | Bar application method and apparatus | |
JP2000262949A (en) | Slide bead coating method with pva coating liquid and device therefor | |
JPH04244265A (en) | Coating method | |
JP2003117478A (en) | Coating method | |
JPS6320070A (en) | Coater | |
JP2520733B2 (en) | Application method | |
JPH02214568A (en) | Coating device | |
JPH02164480A (en) | Coating method | |
JP2009226305A (en) | Coating method and apparatus | |
JP2003236456A (en) | Rod coating method | |
JPH06277616A (en) | Method for coating | |
JP2000117174A (en) | Applicator | |
JPH0194974A (en) | Coating method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19808438 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19808438 Country of ref document: EP Kind code of ref document: A1 |