KR20150133206A - Coating device - Google Patents

Abstract

The applicator is a applicator for applying a varnish containing particles and resin. The coating device includes a manifold for widening the varnish in a first direction orthogonal to the discharging direction and a discharging portion for discharging the varnish widened in the first direction by the manifold. The manifold is provided with an enlarged portion that gradually becomes longer as the first direction length is directed toward the downstream side in the discharge direction. The discharge portion is provided with a discharge suppressing portion for relatively suppressing the discharge of the varnish at the first direction end portion of the discharge portion.

Description

[0001] COATING DEVICE [0002]

The present invention relates to a coating apparatus, and more particularly, to a coating apparatus for coating a varnish containing particles and resin.

BACKGROUND ART Conventionally, various coating apparatuses for applying a varnish containing a resin have been known.

In addition, when the varnish is a non-Newtonian fluid or when the varnish has a low affinity with the substrate to which the varnish is applied, there is a case where both ends of the coating film swell up compared with the central part. Such a swelling portion deteriorates the flatness of the coating film.

For example, it is possible to provide a slot die in which a slot for supplying a coating liquid is provided on a coated substrate, and a slot is opposed to the coated substrate and a cross section of the slot facing the coated substrate is provided at both ends thereof, (For example, refer to Patent Document 1 below).

Japanese Patent Application Laid-Open No. 2004-305955

However, when the varnish further containing particles is applied by the slot die coating apparatus described in Patent Document 1, the discharge flow is reduced at both ends of the slot. Therefore, at both ends of the manifold of the slot die, So that the flow of the varnish becomes remarkably gentle. Therefore, the varnish tends to stay, and in the retention portion of such a varnish, when the specific gravity of the particles is relatively large, the particles settle. Therefore, there is a drawback that the distribution of the particles in the retention portion becomes uneven, and the distribution of the particles in the manifold tends to become uneven. As a result, there is a drawback that the distribution of particles in the coating film becomes uneven.

An object of the present invention is to provide a coating device capable of ensuring the uniformity of particles in a coating film while ensuring the flatness of the coating film.

In order to achieve the above object, a coating apparatus of the present invention is a coating apparatus for coating a varnish containing particles and resin, comprising: a manifold for widening the varnish in a first direction orthogonal to a discharge direction; And a discharge portion for discharging the varnish widened in the first direction by the discharge portion, wherein the manifold is provided with an enlarged portion that gradually becomes longer as the first direction length is directed toward the downstream side in the discharge direction, And a discharge suppressing portion for relatively suppressing the discharge of the varnish at the first direction end portion of the discharge portion.

In such an apparatus, the discharge suppressing portion can relatively suppress the discharge of the varnish at the first direction end portion of the discharge portion. Therefore, the swelling of the coating film in the first direction end portion can be suppressed, and the flatness of the coating film can be secured.

On the other hand, in such a coating device, in the first direction end portion of the discharge portion, when the discharge flow of the varnish drops, the varnish passing through the manifold is discharged toward the outside in the first direction The discharge flow of the varnish due to the presence of the particles in the varnish can be prevented from being gentle and the retention of the varnish can be prevented from occurring. As a result, it is possible to eliminate the unevenness of the particles in the varnish in the manifold. Therefore, uniformity of the particles in the coating film can be sufficiently ensured while ensuring the flatness of the obtained coating film.

Further, in the coating apparatus of the present invention, the manifold includes an inlet portion into which the varnish flows and which expands as the cross-sectional area of the opening along the direction orthogonal to the discharging direction is directed toward the downstream side in the discharging direction; And an outlet portion provided on the downstream side in the discharging direction, the varnish flowing out from the inlet portion and being reduced as the sectional area of the opening along the orthogonal direction is directed toward the discharging direction, wherein the enlarged portion is provided in the inlet portion Do.

In the manifold, as compared with the outlet portion where the cross-sectional area of the opening along the orthogonal direction is reduced as the cross-sectional area of the opening is reduced toward the discharging direction, at the inlet portion enlarged as the cross- The discharge flow tends to be gentle, and the varnish tends to cause the retention of the varnish.

However, in such a coating device, since the enlarged portion is provided in the inflow portion, the discharging flow of the varnish is prevented from becoming gentle, and the retention of the varnish can be prevented.

Further, in the coating apparatus of the present invention, an attachment member detachable from the manifold for partitioning the enlarged portion is provided at the first direction end on the upstream side of the manifold in the discharge direction It is a good memory.

According to such a coating device, since the attachment member can be detachably attached to the manifold, it can be replaced with an attachment member of a desired shape in accordance with the characteristics of the varnish.

Further, it is preferable that the coating device of the present invention is provided with a transparent member capable of visually observing a varnish passing through the enlarged portion.

According to such a coating device, since the varnish passing through the enlarged portion can be seen through the transparent member, the state of the particles in the varnish can be simply inspected.

According to the coating apparatus of the present invention, the uniformity of the particles in the obtained coating film can be sufficiently secured.

1 is a perspective view of one embodiment of a coating device of the present invention,
Fig. 2 is a plan view of the nozzle of the applicator of Fig. 1,
Fig. 3 is a bottom view of the nozzle of Fig. 2,
Figure 4 is a side view of the nozzle of Figure 2,
FIG. 5 is a side sectional view of the nozzle of FIG. 2 along the line AA,
Fig. 6 is a side sectional view along the BB line of the nozzle of Fig. 2,
Fig. 7A is a front sectional view showing a first seam, omitting a second seam, Fig. 7B is a front sectional view showing a second seam, Fig.
Fig. 8 is an exploded perspective view of the nozzle of Fig. 2,
Figure 9 is a exploded side cross-sectional view of the nozzle of Figure 2,
Fig. 10 is a view showing a state in which a varnish is applied by the nozzle shown in Fig. 5,
11 is a bottom view of a nozzle according to another embodiment of the application device of the present invention,
12 is a bottom view of a nozzle according to another embodiment of the application device of the present invention,
13 is a bottom view of a nozzle according to another embodiment of the application device of the present invention,
14 is a front sectional view of a nozzle according to another embodiment of the application device of the present invention,
15 is an image processing chart of a photograph of the varnish of the nozzle of the coating device of Example 1,
16 is an image processing chart of a photograph of a varnish of a nozzle of a coating device of Comparative Example 1. Fig.

1 to 10, an embodiment of a coating apparatus of the present invention will be described.

2, the left and right direction of the paper is a left-right direction (the first direction or the width direction), the paper vertical direction is the front-rear direction (second direction or thickness direction), and the paper thickness direction is the up- The discharge direction), and concretely, it corresponds to the directional arrow shown in Fig. 2 with reference to the direction of Fig.

7A and 7B, in order to clearly show the relative arrangement of the manifold 21 (described later), the seam 13 (described later), and the attachment member 25 (described later), the second block 12 ) (To be described later) are omitted. 8, the attachment member 25 is omitted in order to clearly show the relative positions of the seam 13, the first block 11, and the second block 12. As shown in Fig. 7B, the first seam 14 (to be described later) is omitted in order to clearly show the shape of the second seam 15 (described later).

In Fig. 1, this coating device 1 is a coating device for applying a varnish containing particles and resin (described later). The coating device 1 includes a tank 2, a pump 3, and a nozzle 5. [ The tank 2, the pump 3 and the nozzles 5 are sequentially arranged from the upstream side to the downstream side in the discharge direction of the varnish.

The tank 2 is a reservoir for storing the varnish and is provided on the upper part of the application device 1. [

The pump 3 is connected to the tank 2 via the first pipe 61 and specifically to the front side of the tank 2. The pump 3 is not particularly limited as long as it is a pump capable of discharging the varnish stored in the tank 2 by applying a predetermined pressure to the nozzle 5. The pump 3 may be a mono pump (specifically, And a pump commercially available as a mono pump (manufactured by Heise Shinobu Co., Ltd.).

1, the nozzle 5 is disposed, for example, in a slot die coater, specifically, below the pump 3, and the pump 3 is provided with a second And is connected via a pipe 69. The nozzle 5 is formed in a thick flat plate shape extending in the vertical direction and in the lateral direction. The nozzle 5 includes a first block 11, a second block 12 disposed opposite to the front side of the first block 11, and a second block 12 disposed between the first block 11 and the second block 12. [ (13).

The first block 11 is made of, for example, a metal such as stainless steel or a resin such as acrylic resin. The first block 11 is preferably made of metal from the viewpoint of durability.

As shown in Figs. 2 and 8, the first block 11 has a thick flat plate shape extending in the up-and-down direction and the left-right direction. Specifically, the first block 11 is formed in a substantially rectangular shape in plan view and front view, The upper portion is formed in a substantially rectangular shape and the lower portion is formed in a substantially triangular shape in which the length in the front-rear direction becomes shorter as the lower portion is directed downward. In addition, the first block 11 is formed in a frame shape having a bottom portion concaved rearward at the central portion of the front surface. The first block 11 integrally includes a top wall 46a, a bottom wall 46b, and a pair of side walls 46c.

The upper wall 46a is formed in a substantially rectangular shape when viewed from the plane extending in the left-right direction and in a substantially rectangular shape when viewed from the front. As shown in Figs. 5 and 6, the upper wall 46a is formed such that the upper portion thereof is formed in a substantially rectangular shape as viewed from the side, and the lower surface 47 thereof is formed as a curved surface. Concretely, the lower surface 47a of the upper wall 46a is formed into an arc shape which gradually curves downward toward the rear side

The lower wall 46b is provided adjacent to the lower end of the upper wall 46a. As shown in Figs. 3 and 7A to 7B, the lower wall 46b is formed in a substantially rectangular shape when viewed from the bottom surface extending in the left-right direction, and in a substantially rectangular shape when viewed from the front. 5 and 6, the lower wall 46b is formed as an inclined surface that is inclined downward linearly as the lower surface thereof is viewed from the side, and the upper surface 48 And is formed as an inclined surface that slopes downward in a straight line as it faces the front side. The upper edge of the upper surface 48 of the lower wall 46b is formed to be continuous with the lower edge of the lower surface 47 of the upper wall 46a.

As shown in Figs. 7A to 7B and Fig. 8, the pair of side walls 46c are continuous to both ends of the upper wall 46a and the lower wall 46b in the left and right direction, As shown in Fig. In addition, the side wall 46c is formed in a substantially triangular shape in which the upper portion is formed in a substantially rectangular shape as viewed from the side, and the length in the forward and backward direction is reduced as the lower portion is directed downward.

In the first block 11, the front surfaces of the upper wall 46a, the lower wall 46b and the pair of side walls 46c are formed in a substantially rectangular frame shape when viewed from the front side of the plane. 5 and 7A to 7B, in the first block 11, the lower surface 47a of the upper wall 46a, the upper surface 48 of the lower wall 46b, the pair of side walls 46c of the manifold 21 are formed. The manifold 21 is provided to widen the varnish supplied from the supply hole 20 to be later described laterally.

Specifically, the manifold 21 has an inlet portion 50 and an outlet portion 51.

The inlet portion 50 is formed by the lower surface 47 of the upper wall 46a and the inner surface (inner surface) of the pair of side walls 46c. The inlet portion 50 is formed so that the cross-sectional area of the opening along the left-right direction and the forward-backward direction (the ejection direction) is enlarged toward the downward direction (downstream side in the ejection direction). The inflow space 50 is defined by the inflow space 50.

The outflow portion 51 is formed by the upper surface 48 of the lower wall 46b and the inner surface (inner surface) of the pair of side walls 46c. The outflow portion 51 is formed such that the cross sectional area of the opening along the left-right direction and the front-rear direction (the direction orthogonal to the discharge direction) is reduced as it approaches the discharge direction. The outflow portion (53) is partitioned by the outflow portion (51) so as to communicate with the inflow space (52).

By this manifold 21, the manifold space is partitioned.

The manifold space is formed with an inflow space 52 and an outflow space 53.

A feed hole 20 is formed in the upper wall 46a so as to penetrate the upper wall 46a in the vertical direction. The supply hole 20 is formed in the upper wall 46a in order to supply the varnish from the pump 3 to the cavity 49 (to be described later) via the second pipe 69 and has a substantially columnar shape. Further, as shown in Fig. 2, the supply hole 20 is provided at a substantially central portion in the left-right direction of the upper wall 46a as viewed in plan. 5, the lower end of the supply hole 20 is bent downward in the forward direction and opened to the lower surface 47 of the upper wall 46a.

7A to 7B, a first fixing hole 28 is formed in the upper wall 46a and the pair of side walls 46c so as to be punched rearward from the front surface thereof. A plurality of first fixing holes 28 are provided at intervals. Specifically, the first fixing holes 28 are formed at equal intervals in the left-right direction on the front surface of the upper wall 46a. The first fixing holes 28 are formed at equal intervals in the vertical direction on the front surface of the pair of side walls 46c.

Further, as shown in Figs. 4 and 7A to 7B, a pair of side wall 46c is formed with a second fixing hole 29 penetrating in the left-right direction. The second fixing hole 29 is provided at a position communicating with the inflow space 52 (see Fig. 5) in the pair of side walls 46c.

As shown in Figs. 6 and 7A to 7B, the attachment member 25 is attached to the manifold 21. As shown in Fig.

Two attachment members 25 are provided on the upper side (on the upstream side in the discharge direction) of the manifold 21 at intervals in the left-right direction.

As shown by broken lines in Fig. 2 and Fig. 6, each attachment member 25 has a substantially rectangular shape when viewed in plan view extending in the left-right direction, and the lateral side outer side surface thereof is formed into a flat shape extending in the up- . In addition, the attachment member 25 has a fan shape as viewed from the side, and the lower surface thereof is formed on the flat surface, and is formed into an arc shape gradually curved downward as the upper surface is directed backward. The attachment member 25 is formed in a substantially triangular shape (specifically, a right-angled triangular shape) when viewed from the front, as shown by the thick lines and the thin line hatching in Figs. 7A to 7B. The lower surfaces of the two attachment members 25 are formed as inclined surfaces inclined downward as viewed from the front and facing the outside in the left and right direction, and they are arranged so as to face each other in the left-right direction.

As shown in Fig. 6, the attachment member 25 is provided with a protruding portion which slightly protrudes forward from the first block 11 when projected in the vertical direction and the lateral direction.

As shown in Figs. 6 and 7A to 7B, the lateral edge portions of the lower surface of the attachment member 25 in the left and right direction are located at the lower edge of the lower surface 47 of the upper wall 46a Respectively. The right and left inner edges of the lower surface of the attachment member 25 are adjacent to both left and right ends of the feed hole 20 and extend in the left and right direction of the lower end of the feed hole 20 And are disposed adjacent to the outer sides of both sides.

By mounting the attachment member 25 on the manifold 21, an enlarged portion 33 is formed in the inflow space 52 of the cavity 49 so that the length of the cavity 49 gradually becomes longer toward the lower side .

The enlarged portion 33 is formed in a substantially inverted V-shape so that the length in the left-right direction becomes gradually longer toward the downward direction with the feed hole 20 as a center.

The second block 12 is a transparent member formed of a transparent material such as glass, an acrylic resin (specifically, polymethyl methacrylate), or a transparent resin such as a silicone resin.

As shown in Fig. 8, the second block 12 has a flat plate shape extending in the left-right direction and is formed in a substantially triangular shape in which the length in the front-rear direction becomes shorter as the lower end is directed downward. The second block 12 is formed so as to overlap with the first block 11 when projected in the forward and backward directions. The upper surface and the both side surfaces of the second block 12 are formed to be the upper surface and the both side surfaces of the first block 11 and the lower end portion of the second block 12 is formed to be the same as the upper surface The lower end, and the projection in the fore-and-aft direction.

Although not shown, a plurality of first fixing holes 28 (see Figs. 7A to 7B) having the same arrangement and size as those of the first block 11 are formed in the second block 12 have.

The seam 13 is formed of the same material as the first block 11, for example. The seam (13) has a first seam (14) and a second seam (15) disposed on the front side of the first seam (14).

The first seam 14 is a thin plate formed in a substantially inverted U shape when viewed from the front where the lower side is opened. The first seam 4 is disposed so as to overlap the front surface of the upper wall 46a of the first block 11 and the front surface of the pair of side walls 46c when projected in the front-rear direction.

As shown in Fig. 7B (hatching indicated by a thin line) and Fig. 8, the second seam 15 is a thin plate formed in a substantially inverted U shape as viewed from the front side in which the lower side is opened. The second seam 15 is formed so as to bulge inwardly of the first seam 14 as viewed from the front. Specifically, when projecting in the front-rear direction, the second seam 15 is exposed to the inner side in the left-right direction from the first seam 14 and the overlapped portion 17 overlapping with the first seam 14, And a swelling portion 16 which bulges inward from the overlapping portion 17.

The bulged portion 16 is formed to bulge substantially in a rectangular shape inward in the left and right direction from the side wall facing portion 17c opposed to the pair of side walls 46c of the second seam 15. As shown in Fig. 7B, when projecting in the forward and backward directions, the bulged portion 16 is cut out in a substantially rectangular shape as viewed from the front, so that the bulged portion 16 is not overlapped with the attachment member 25. [ Specifically, the bulged portion 16 is cut away from the inner edge of the upper end toward both the left and right outer sides.

Each of the first seam 14 and the second seam 15 has a plurality of first fixing holes 28 (see Fig. 7) having the same arrangement and size as the first block 11 as viewed from the front Respectively.

Next, the mounting and mounting of the nozzle 5 will be described with reference to Figs. 8 and 9. Fig.

First, the first block 11, the attachment member 25, the first seam 14, the second seam 15, and the second block 12 are prepared.

Subsequently, the attachment member 25 is mounted on the manifold 21 of the first block 11, and the front surface and the bottom surface 46b of the upper wall 46a (see Figs. 7A to 7B) 13 (the first seam 14 and the second seam 15).

Specifically, after the attachment member 25 is inserted into the manifold 21, a fixing member (not shown) is inserted through the second fixing hole 29 (see Figs. 4 and 7A to 7B) And reaches the member 25, thereby fixing the attachment member 25 to the manifold 21. [

Further, the first seam 14 is brought into contact with the front surface of the upper wall 46a and the entire surface of the lower wall 46b.

Then, the overlapping portion 17 of the second seam 15 is brought into contact with the front surface of the first seam 14. At this time, the second seam 15 is disposed in the first seam 14 so that the swelled portion 16 is exposed inward in the left-right direction from the first seam 14. [ Further, the attachment member 25 is passed through the notched portion of the bulging portion 16 of the second seam 15.

Then, the rear surface of the second block 12 is brought into contact with the front surface of the second seal 15 and the front surface of the attachment member 25. Then, a fixing member (not shown) is inserted through the first fixing holes 28 (see Figs. 7A to 7B) of the first block 11, the seam 13 and the second block 12 and fixed . As a result, the first block 11 and the second block 12 allow the nozzle 5 to be mounted and fixed via the seam 13 (the first seam 14 and the second seam 15) do.

5, the manifold 21 of the first block 11, the inner surface of the seam 13, and the rear surface of the second block 12 are provided on the nozzle 5, The cavity 49 is formed.

7A and 7B and 8) of the seam 13 and the rear surface of the second block 12 are formed by the front surface of the lower wall 46b of the first block 11, A slit 56 is formed. The slit 56 is opened in a substantially rectangular shape when viewed from a plane extending in the left-right direction, and is opened in a substantially rectangular shape when viewed from the side extending in the up-down direction.

3 and 5, the lower end (discharge port) of the slit 56 is open at the slot 57. As shown in Fig. The slot (57) is formed as a discharge port extending in the left and right direction when viewed from the bottom.

As shown in Fig. 3, the slot 57 is formed with a discharge port in which the swelling portion 16 bulges at the front end of the left and right end portions. Specifically, the bulged portion 16 reduces the opening cross-sectional area of the left-right direction end portion of the slot 57 with respect to the opening cross-sectional area in the middle in the left-right direction (central portion) as it bulges from the first seam 14. Specifically, since the swollen portion 16 is provided at both ends in the left and right direction of the slot 57, the length in the anteroposterior direction is about one half of the length in the anteroposterior direction (middle portion) in the right and left direction.

Therefore, the varnish discharge flow at both ends in the left and right direction of the slot 57 is suppressed by the swelling portion 16.

Therefore, at both ends in the left-right direction of the slot 57, the discharge flow is reduced as compared with the right-and-left center (middle) portion of the slot 57 in which the opening cross-

The lower wall 46b, the seam 13 and the second block 12 partitioning the slit 56 serve as the discharge portion 23. [

The dimensions of the nozzle 5 are appropriately set according to the physical properties (including viscosity) of the varnish, the shape and / or thickness of the coating film 60 (see Fig. 10), and are not particularly limited. The width (lateral length) of the nozzle 5 is, for example, 30 mm or more, preferably 50 mm or more, for example, 500 mm or less, and preferably 200 mm or less. The inner diameter of the supply hole 20 is, for example, 2 mm or more, preferably 5 mm or more, for example, 30 mm or less, and preferably 15 mm or less. The width (lateral length) of the cavity 49, the slit 56 and the slot 57 is, for example, 10 mm or more, preferably 30 mm or more, for example, 450 mm or less , It is 150 mm or less. The length of the inflow space 52 in the up and down direction is, for example, 3 mm or more, preferably 5 mm or more, for example, 80 mm or less, preferably 50 mm or less, For example, 3 mm or more, preferably 5 mm or more, for example, 50 mm or less, and preferably 30 mm or less. The length of the outflow space 53 in the up and down direction is, for example, 3 mm or more, preferably 5 mm or more, for example, 80 mm or less, preferably 50 mm or less.

The width (lateral length) of the attachment member 25 is, for example, not less than 5 mm, preferably not less than 15 mm, for example, not more than 200 mm, and preferably not more than 70 mm. The length of the attachment member 25 in the up-and-down direction is, for example, 3 mm or more, preferably 5 mm or more, for example, 80 mm or less, and preferably 50 mm or less. The longitudinal length of the attachment member 25 is, for example, not less than 3 mm, preferably not less than 5 mm, for example, not more than 50 mm, preferably not more than 30 mm.

The longitudinal length of the slit 56 and the longitudinal length of the slot 57 (outlet) are substantially equal to the longitudinal length of the seam 13 and are, for example, 0.1 mm or more, preferably 0.5 mm For example, 3 mm or less, and preferably 2 mm or less.

The thickness of the first seam 14 is, for example, 0.05 mm or more, preferably 0.2 mm or more, for example, 3 mm or less, and preferably 1.5 mm or less. The thickness of the second seal 15 is, for example, the same as that of the first seal 14. More specifically, the thickness of the second seal 15 is 0.05 mm or more, preferably 0.2 mm or more, Mm or less, preferably 1.5 mm or less.

The bulge length (lateral length) of the bulging portion 16 is, for example, 0.2 mm or more, preferably 1 mm or more, for example, 6 mm or less, preferably 3 mm or less.

1, a moving device 55 capable of moving the nozzle 5 in the front-rear direction, the left-right direction and / or the vertical direction is provided on the upper side of the pump 3 Respectively.

Next, a method of applying the varnish using the coating device 1 will be described with reference to Figs. 1 and 10. Fig.

In this method, a varnish is first prepared.

The varnish contains particles and resin as essential components.

The particles are appropriately set according to the use and purpose of the coating film, and examples thereof include a fluorescent substance and a filler.

The phosphor has a wavelength converting function, and includes, for example, a yellow phosphor capable of converting blue light into yellow light, and a red phosphor capable of converting blue light into red light.

As the yellow phosphor, such as _{(Ba, Sr, Ca) 2} SiO 4; Eu, (Sr, Ba) 2 SiO 4: Eu ( barium orthosilicate (BOS)) silicate phosphor, such as, for example, Y ₃ Al A garnet-type phosphor having a garnet-type crystal structure such as ₅ O ₁₂ : Ce (YAG (yttrium aluminum garnet): Ce), Tb ₃ Al ₃ O ₁₂ : Ce (TAG (terbium aluminum garnet) -? - SiAlON, and the like.

Examples of the red phosphor include nitride phosphors such as CaAlSiN ₃ : Eu and CaSiN ₂ : Eu.

Examples of the shape of the phosphor include spheres, plates, needles, and the like. Preferably, from the viewpoint of fluidity, a spherical shape can be mentioned.

The average value of the maximum length of the phosphor (the average particle diameter in the case of a spherical phase) is 0.1 탆 or more, preferably 1 탆 or more, for example, 200 탆 or less, preferably 100 탆 or less Do.

The specific gravity of the phosphor is, for example, 2.0 or more, and is, for example, 9.0 or less.

The phosphor may be used alone or in combination.

The mixing ratio of the phosphor is, for example, not less than 0.1 part by mass, preferably not less than 0.5 parts by mass, for example, not more than 80 parts by mass, preferably not more than 60 parts by mass, per 100 parts by mass of the resin.

The filler is incorporated in the varnish in order to improve the toughness of the coating film, and examples thereof include organic fine particles such as silicon particles, for example, inorganic fine particles such as silica, talc, alumina, aluminum nitride and silicon nitride.

The specific gravity of the filler is, for example, 0.5 or more, and is, for example, 7.0 or less.

The average value of the maximum length of the filler (average particle diameter in the case of spherical shape) is, for example, not less than 0.1 탆, preferably not less than 0.5 탆, and is, for example, not more than 200 탆, Do.

The filler may be used alone or in combination.

The mixing ratio of the filler is, for example, not less than 0.1 part by mass, preferably not less than 0.5 parts by mass, and not more than 70 parts by mass, preferably not more than 50 parts by mass, for example, 100 parts by mass .

When the fluorescent substance and the filler are used in combination, the total amount of the fluorescent substance and the filler is, for example, not less than 0.1 part by mass, preferably not less than 0.5 parts by mass, for example, 80 parts by mass Or less, preferably 60 parts by mass or less.

Examples of the resin include a curable resin such as a silicone resin, an epoxy resin, a polyimide resin, a phenol resin, a urea resin, a melamine resin, and an unsaturated polyester resin.

Examples of the resin include polyolefins (e.g., polyethylene, polypropylene, ethylene-propylene copolymer and the like), acrylic resins (such as polymethyl methacrylate), polyvinyl acetate, ethylene- A polyolefin, a copolymer, a polyvinyl chloride, polystyrene, polyacrylonitrile, polyamide, polycarbonate, polyacetal, polyethylene terephthalate, polyphenylene oxide, polyphenylene sulfide, polysulfone, polyether sulfone, polyetherketone, poly A polyimide resin, a polyamideimide, a polyetherimide, a bismaleimide triazine resin, polymethylpentene, a fluorinated resin, a liquid crystal polymer, an olefin-vinyl alcohol copolymer, Acrylonitrile-ethylene-styrene copolymers, acrylonitrile-butadiene-styrene copolymers, acrylonitrile- Acrylonitrile-ethylene copolymers, acrylonitrile-it can be also thermoplastic resins such as a styrene copolymer.

As the resin, a curable resin is preferable, and a curable silicone resin is more preferable.

As the curable silicone resin, for example, a two-stage curing silicone resin, a one-stage curing silicone resin and the like can be given.

The two-step curable silicone resin is a curable silicone resin which has a two-step reaction mechanism and is B-staged (semi-cured) in the first-step reaction and C-staged (fully cured) in the second-step reaction.

The B stage is a state in which the two-stage curing-type silicone resin is in a state between the A stage which is soluble in the solvent and the C stage which is completely cured and hardens and gels slightly, swells with the solvent but is not completely dissolved, But it is not dissolved.

The first-stage curable silicone resin is a curable silicone resin which has a one-step reaction mechanism and is completely cured in the first-step reaction.

As the curable silicone resin, for example, a thermosetting silicone resin cured by heating, an active energy ray-curable silicone resin cured by irradiation of an active energy ray (for example, ultraviolet ray, electron beam or the like) . Preferably, a thermosetting silicone resin can be mentioned.

The specific gravity of the resin is, for example, lighter than the specific gravity of the fluorescent substance and / or the filler, specifically, for example, 0.5 or more and, for example, 2.0 or less.

The blend ratio of the resin is, for example, not less than 0.1% by mass, preferably not less than 0.5% by mass, and more preferably not more than 100% by mass, and preferably not more than 99.5% by mass, relative to the varnish.

In the varnish, optional components such as a solvent and an additive may be blended in an appropriate ratio, if necessary. Examples of the solvent include aliphatic hydrocarbons such as hexane, and aromatic hydrocarbons such as xylene, for example, siloxanes such as vinyl methyl cyclic siloxane and vinyl terminated polydimethyl siloxane.

Examples of the additive include surface modifiers such as a dispersant, a silane coupling agent, and a leveling agent.

The above components are mixed and stirred to prepare a varnish.

The viscosity of the varnish under conditions of 25 ° C and 1 atm is, for example, 1,000 mPa · s or more, preferably 4,000 mPa · s or more and, for example, 1,000,000 mPa · s or less, 100,000 mPa s or less. The viscosity is measured by rotating the varnish at 25 캜 and using an E-type cone at a rotation speed of 99 s ^-1 .

Subsequently, the prepared varnish is put into the tank 2.

Separately, a substrate 54 is prepared.

The base material 54 is formed in a sheet shape, and its outer shape is not particularly limited. For example, as shown in Fig. 1, the base material 54 is formed into a substantially rectangular shape (including a strip shape and a long shape) Respectively. Further, the base material 54 is arranged along the horizontal direction.

The base material 54 is formed of a resin such as a polyester resin such as polyethylene terephthalate (PET), for example, a polyolefin resin such as polypropylene, or the like. Further, the base material 54 may be formed of, for example, a metal. The surface of the base material 54 may be subjected to a peeling treatment or the like.

10, the discharging portion 23 (slot 57) of the nozzle 5 is opposed to the base material 54, and the discharging portion 23 is brought close to the base material 54. Then, as shown in Fig.

At this time, the length of the doctor 26 and the substrate 54 in the vertical direction is set to a desired thickness or more, for example, the same thickness of the coating film 60 (see FIG. 10) For example, 10 mu m or more, preferably 30 mu m or more, and for example, 3000 mu m or less, preferably 2800 mu m or less.

Subsequently, the pump 3 is driven and the nozzle 5 is horizontally moved forward by the moving device 55. Next,

Then, by driving the pump 3, the varnish is guided from the tank 2 to the supply hole 20 (see Fig. 5) through the first pipe 61, the pump 3 and the second pipe 69 do.

Then, the varnish flows into the inflow space 52 and is enlarged in the left-right direction as shown in Figs. 7A to 7B in the enlarged portion 33, and at the same time, the driving of the pump 3 and / And is discharged to the outflow space 53 by gravity. Then, as shown in Fig. 6, in the outflow space 53, the varnish narrows in the anteroposterior direction, flows downward, and reaches the slit 56. [

Thereafter, in the slit 56, the flow of the both ends in the left and right direction (the both ends in the first direction) is suppressed by the swollen portion 16, and the swollen portion 16, And discharged from the slot 57 toward the base material 54 while the discharge of both ends is suppressed.

The varnish discharged to the base material 54 is adjusted in thickness by the doctor 26 of the first block 11 of the nozzle 5 moving forward.

Thereafter, if necessary, the varnish is dried to form the coating film 60. [

The coating film 60 can be formed in a single piece by intermittently coating the varnish with the base material 54 or by continuously discharging the varnish onto the base material 54, May be continuously formed. Thereafter, the continuous coating film 60 may be formed into a single piece by external contouring such as cutting.

Thereafter, if necessary, in the case where the resin contains a curable resin, the resin is cured by heat, active energy rays or the like. Thereby, a coating film 60 after curing (or after semi-curing) is formed.

In the case where the resin includes a thermoplastic resin, a heater is provided in the coating device 1, and the above-mentioned treatment is performed while melting or softening the resin.

In this coating device 1, the swelling portion 16 can relatively suppress the discharge of the varnish at the both ends in the left-right direction of the discharge portion 23. That is, the discharge of the varnish at both ends in the left-right direction of the discharge portion 23 can be suppressed against the discharge of the varnish in the intermediate portion of the discharge portion 23 in the left-right direction. Therefore, it is possible to suppress the swelling in the thickness direction at both ends in the left and right direction of the coating film 60, and to ensure the flatness of the coating film 60. [

The varnish passing through the manifold 21 is discharged from the enlarged portion 33 even if the discharging flow of the varnish drops at both ends of the discharging portion 23 in the coating device 1, The discharge flow of the varnish due to the presence of particles in the varnish is prevented from being gentle because the varnish gradually spreads to both sides in the left and right direction (outside the first direction) as it goes downward (in the discharge direction downstream side) It is possible to prevent the stay of the varnish from occurring. As a result, the unevenness of the particles in the varnish in the manifold 21 can be solved. Therefore, the uniformity of the particles in the coating film 60 can be sufficiently ensured while ensuring the flatness of the obtained coating film 60.

In addition, since the cross-sectional area of the inlet space 52 along the direction orthogonal to the discharge direction is larger than that of the supply hole 20, and the cross-sectional area of the opening is enlarged toward the downside in the inflow space 52, It is possible to quickly spread the light in the left and right directions. On the other hand, since the outlet space 53 is reduced as the opening cross-sectional area is directed downward, it can be fed into the slit 56 while applying pressure to the varnish.

However, in the manifold 21, the discharge flow of the above-described varnish tends to become gentler in the inflow portion 50 than in the outflow portion 51, so that the above-described retention of the varnish tends to occur.

However, in the coating device 1, since the enlarged portion 33 is provided in the inflow portion 50, the discharge flow of the varnish described above can be prevented from being gentle, and the retention of the varnish can be prevented.

7A and 7B, the attachment member 25 is configured so as to be detachable from the manifold 21. For example, although not shown, the attachment member 25 may be integrally formed with the manifold 21, It can also be configured as an enemy. Preferably, the attachment member 25 is configured to be detachable from the manifold 21. According to such a coating device 1, it is possible to replace the attachment member 25 having a desired shape in accordance with the characteristics of the varnish. Specifically, the inclination angle of the lower surface (inclined surface) of the attachment member 25 is changed in accordance with the viscosity of the varnish. Specifically, the inclination angle of the attachment member 25 (inclined plane) is changed according to the kind of the particles, the mixing ratio, the shape, the average particle diameter, the type of resin, the mixing ratio, the viscosity, Thus, the stay of the varnish described above can be simply prevented.

Further, although the second block 12 is made of a transparent member, it may be made of a metal opaque member, for example. Preferably, the second block 12 is a transparent member. According to such a coating device 1, since the varnish passing through the cavity 49 including the enlarged portion 33 can be seen through the second block 12 which is a transparent member, the state of particles in the varnish can be made simple You can check it.

In order to confirm the stay of the varnish in the enlarged portion 33, the second block 12 is not limited to the second block 12 made of the transparent material described above. For example, in the second block 12, (For example, a window) may be formed of a transparent material, and the other portion may be an opaque member.

1, the nozzle 5 is moved relative to the base material 54. For example, the base material 54 and the nozzle 5 may move relative to each other, and the nozzle 5 The substrate 54 may be moved relative to the substrate 54.

In the above description, the nozzle 5 is provided so as to face downward the slot 57, but it may be directed to the side or upward, for example.

In the embodiment of Fig. 3, the swelling portion 16 is provided in the second seam 15. However, it may be provided in the first seam 14 as shown in Fig. 11, for example.

In the embodiment of Fig. 3, the two swelled portions 16 are provided in the second seam 15. However, for example, as shown in Fig. 12, one swelled portion 16 may be provided on the right side portion And the other swelling portion 16 may be provided in the first seam 14 on the left side.

In the embodiment of Fig. 3, the swelling portion 16 is formed in a substantially rectangular shape when viewed from the bottom. For example, as shown in Fig. 13, It may be formed in a triangular shape.

In the embodiment of Fig. 7B, the swelling portion 16 is formed to extend over the portion corresponding to the cavity 49 and the slit 56. For example, as shown in Fig. 15, As shown in Fig.

In the embodiment of Fig. 1, the nozzle 5 is moved forward, but the moving direction is not limited to this. For example, the nozzle 5 may be moved backward. In this case, the thickness of the coating film 60 is adjusted by the doctor 26 of the second block 12, as shown in Fig.

Further, in each of the above-described embodiments, the components in the nozzle 5 may be subjected to processing such as chamfering.

(Example)

The numerical values in the following examples and comparative examples can be replaced with the corresponding numerical values described in the above embodiments (that is, the upper limit value or the lower limit value).

(Example 1)

<Preparation of varnish>

20 masses of silicone particles (Tospearl 2000B, specific gravity 1.32, manufactured by Momentive Performance Materials Japan) were added to 80 parts by mass of a liquid silicone resin (liquid A of LR7665, one-stage curing silicone resin, specific gravity 1.0, manufactured by Shinetsu Kagaku Kyo Kaisha) And 15 parts by mass of YAG: Ce (Y-468, specific gravity 4.5, yellow phosphor, manufactured by Nemotolumi Material Co., Ltd.) were added, and the mixture was stirred and mixed to prepare a varnish.

The viscosity of the varnish under conditions of 25 ° C and 1 atm was 40,000 mPa · s.

<Application to substrate>

As shown in Figs. 1 to 10, a coating apparatus including a tank, a pump, a nozzle (including an attachment member and a bulge), and a moving device was prepared. The dimensions of the nozzle are shown below.

[Nozzle]

Width of nozzle (length in the left-right direction): 70 mm

Inner diameter of feed hole: 10.5 mm

Width of the cavity (maximum length in the left and right direction): 4 mm

Length of the inflow space in the vertical direction: 10 mm

Length in the forward and backward directions of the inflow space: 10 mm

Length of the outflow space in the vertical direction: 10 mm

Width of attachment member: 22 mm

Length of the attachment member in the vertical direction: 10 mm

Length of the attachment member in the forward and backward directions: 10 mm

Slot width (maximum length in the left and right direction): 50 mm

Length of slit in forward and backward direction: 1 mm

Length of the slit in the vertical direction: 10 mm

Length of the slot in the forward and backward direction: 1 mm

Thickness of the first seam (longitudinal length): 0.4 mm

Thickness of the second seam (longitudinal length): 0.6 mm

Bulge length of bulge (lateral length): 3 mm

Subsequently, the prepared varnish was put into a tank, and a substrate made of PET was prepared separately.

Subsequently, the slots of the nozzles were opposed to the substrate by the moving device such that the length of the doctor and the substrate in the vertical direction was 400 mu m.

Subsequently, the pump was driven, and the nozzle was horizontally moved forward by 140 mm by the moving device.

Thus, a coated film having a length of 54 mm in the left-right direction, a length in the forward-backward direction of 140 mm, and a thickness of 0.4 mm was produced.

(Comparative Example 1)

A coating film was produced in the same manner as in Example 1 except that the attachment member was not mounted on the nozzle.

<Evaluation>

The varnishes in the nozzles at the time of coating in Example 1 and Comparative Example 1 were observed from the second block side with the naked eyes. The photographs are shown in Figs. 15 and 16. Fig.

In Comparative Example 1 in which the attachment member is not mounted on the nozzle, it is possible to identify a lean portion where the YAG: Ce (yellow phosphor) is lean at the corner portion of both the upper end portion and the lateral direction both ends in the upper space, .

As compared with Comparative Example 1, in Example 1, it was found that a lean portion of YAG: Ce (yellow phosphor) was not observed with respect to the varnish, and YAG: Ce (yellow phosphor) was uniform.

While the foregoing invention has been described by way of example of embodiments of the invention, it is to be understood that it is merely illustrative of the invention and is not to be construed in a limiting sense. Modifications of the invention that are evident to one skilled in the art are included in the later claims.

(Industrial availability)

The application device is used for the production of a coating film.

1: Coating device 5: Nozzle
12: second block (transparent member) 16:
21: manifold 23:
33: Magnifying section

Claims (4)

1. A coating device for applying a varnish comprising particles and a resin,
A manifold for widening the varnish in a first direction orthogonal to the discharge direction,
And a discharge unit for discharging the varnish expanded in the first direction by the manifold,
The manifold is provided with an enlarged portion which gradually becomes longer as the first direction length is directed toward the downstream side in the discharge direction,
Characterized in that the discharge portion is provided with a discharge suppressing portion for relatively suppressing the discharge of the varnish at the first direction end portion of the discharge portion
Application device. The method according to claim 1,
Wherein the manifold comprises:
An inlet portion into which the varnish flows and which expands as the cross sectional area of the opening along the direction orthogonal to the discharging direction is directed toward the downstream side in the discharging direction;
And an outlet which is provided on the downstream side in the discharge direction of the inflow portion and in which the varnish flows out from the inflow portion and is reduced as the cross sectional area of the opening along the orthogonal direction is directed toward the discharge direction,
Characterized in that the enlarged portion is provided in the inflow portion
Application device. The method according to claim 1,
Wherein an attachment member detachably attachable to the manifold for partitioning the enlarged portion is provided at the first direction end on the upstream side of the manifold in the discharge direction
Application device. The method according to claim 1,
And a transparent member capable of viewing a varnish passing through the enlarged portion.
Application device.

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