KR20230098632A - slot die - Google Patents

Abstract

The present disclosure is a slot die including a slit for discharging a fluid toward an object to be applied, a front end surface facing the object to be applied, an inner surface defining the slit, a first groove extending in the width direction of the slot die, and the above A block including an outer surface having at least one second groove extending from the first groove toward the front end surface while intersecting the first groove, and adjusting the width of the slit by changing the width of the first groove A slot die comprising at least one adjustment mechanism is provided.

Description

slot die

The present disclosure relates to slot dies.

Slot dies are widely used to apply various fluids. As a method for adjusting the discharge amount of a fluid object discharged from a slot die, the following technique is known, for example.

Patent Document 1 below discloses a die lip driving structure in which a gap between lips is adjusted using a lever mechanism. The die lip drive structure adjusts the gap between the first lip and the second lip by applying a pressure load or a tensile load to a flexible lip portion constituting at least one of the first lip and the second lip provided on the die body. . For example, in the T-die disclosed in Patent Literature 1, a concave notch portion is provided along the width direction near the lower end of the die body, and a flexible lip portion capable of elastic deformation is formed across the notch portion. The gap between the first lip and the second lip is adjusted by deforming the flexible lip portion starting from the concave notch portion.

Patent Literature 2 below discloses an adjustment mechanism for adjusting the opening width of a slot opened at the tip of the tool body by adjusting the opening width of the slit formed along the longitudinal direction on the tip side of the tool body. The adjustment mechanism adjusts the opening width of the slit by means of an electric driving means. The adjustment mechanism is movable in the longitudinal direction by means of electrical movement means.

Patent Document 1: Japanese Unexamined Patent Publication No. 2016-036926 Patent Document 2: Japanese Unexamined Patent Publication No. 2019-171292

When the flexible lip portion is deformed at a predetermined point by the die lip driving structure disclosed in Patent Document 1, the flexible lip portion in the vicinity of the flexible lip portion may also be deformed in accordance with the deformation of the flexible lip portion. The above phenomenon inhibits precise adjustment of the gap between the first lip and the second lip, and reduces the uniformity of the coating film thickness in the width direction. Also in the adjustment mechanism disclosed in Patent Literature 2, there is a possibility that the above phenomenon occurs.

One aspect of the present disclosure aims to provide a slot die that improves the uniformity of the coating film thickness in the width direction.

The present disclosure includes the following aspects.

<1> A slot die including a slit for discharging a fluid toward an object to be applied, wherein a front end surface facing the object to be coated, an inner surface defining the slit, and a first extending in the width direction of the slot die A block including a groove and an outer surface having at least one second groove extending from the first groove toward the front end surface while intersecting the first groove, and changing the width of the first groove to change the width of the slit A slot die comprising at least one adjustment mechanism for adjusting the

<2> The slot die according to <1>, wherein the adjustment mechanism includes a screw for changing the width of the first groove.

<3> The adjustment mechanism includes a pair of adjustment units including a first adjustment unit and a second adjustment unit disposed adjacent to each other with the first groove interposed on the outer surface of the block, and the pair of adjustment units and a screw disposed penetrating the first adjusting unit and including a front end surface in contact with the second adjusting unit in the pair of adjusting units, wherein the screw applies force to the second adjusting unit so that the first adjusting unit is disposed. The slot die according to <1>, wherein the width of the groove is changed.

<4> The adjustment mechanism includes a pair of adjustment units including a first adjustment unit and a second adjustment unit disposed adjacent to each other with the first groove interposed on the outer surface of the block, and the pair of adjustment units a screw disposed through the first adjusting unit and inserted into the second adjusting unit of the pair of adjusting units, wherein the screw pushes and pulls the second adjusting unit to change the width of the first groove; The slot die described in 1>.

<5> The first adjusting part includes a female screw part, the second adjusting part includes a female screw part, and the screw includes a first male screw part engaged with the female screw part of the first adjusting part, and the second adjusting part The slot die according to <4>, which is a differential screw including a second male screw portion engaged with the female screw portion of the.

<6> The at least one adjustment mechanism includes a plurality of adjustment mechanisms arranged along the first groove on the outer surface of the block, and the at least one adjustment mechanism is disposed between two adjacent adjustment mechanisms in the plurality of adjustment mechanisms. The slot die according to any one of <1> to <5>, wherein one of the two second grooves is disposed.

According to one aspect of the present disclosure, a slot die that improves the uniformity of the coating film thickness in the width direction is provided.

1 is a schematic perspective view showing a slot die according to a first embodiment of the present disclosure.
Fig. 2 is a schematic side view of the slot die shown in Fig. 1;
Fig. 3 is a schematic diagram for explaining an application method using the slot die shown in Figs. 1 and 2;
4 is a schematic side view showing a slot die according to a second embodiment of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described in detail. This indication is not limited at all to the following embodiment. The following embodiments may be appropriately changed within the scope of the object of the present disclosure.

When the embodiment of the present disclosure is described with reference to the drawings, descriptions of redundant components and codes in the drawings may be omitted. Components denoted by the same reference numerals in the drawings mean the same components. The ratios of dimensions in the drawings do not necessarily represent actual ratios of dimensions.

In the present disclosure, a numerical range expressed using "-" indicates a range including the numerical values described before and after "-" as the lower limit value and the upper limit value, respectively. In the numerical ranges stepwise described in this disclosure, the upper limit or lower limit of a predetermined numerical range may be substituted with the upper limit or lower limit of another stepwisely described numerical range. In addition, in the numerical range described in this indication, you may replace the upper limit value or lower limit value described in a predetermined numerical range with the value shown in the Example.

In the present disclosure, the amount of each component in the composition means the total amount of a plurality of substances present in the composition when there are a plurality of substances corresponding to each component in the composition, unless otherwise specified.

In the present disclosure, the term "process" includes not only an independent process, but also a process that cannot be clearly distinguished from other processes if the desired purpose of the process is achieved.

In the present disclosure, “mass%” and “weight%” have the same meaning, and “mass parts” and “weight parts” have the same meaning.

In the present disclosure, a combination of two or more preferred embodiments is a more preferred embodiment.

In the present disclosure, ordinal numbers (eg, "first" and "second") are terms used to distinguish components, and do not limit the number of components and superiority or inferiority of components.

In the present disclosure, "solid content" means components other than the solvent.

<Slot die according to the first embodiment>

Referring to Figs. 1 and 2, a slot die according to the first embodiment of the present disclosure will be described. 1 is a schematic perspective view showing a slot die according to a first embodiment of the present disclosure. Fig. 2 is a schematic side view of the slot die shown in Fig. 1; Direction X and direction Y are orthogonal to each other, direction X and direction Z are orthogonal to each other, and direction Y and direction Z are orthogonal to each other. The direction X is parallel to the width direction of the slot die.

The slot die 100 shown in FIGS. 1 and 2 includes a first block 10, a second block 20, and an adjustment mechanism 30. Between the 1st block 10 and the 2nd block 20, the slit 40 and the manifold 50 are formed.

(1st block)

The first block 10 defines the slit 40 and the manifold 50 together with the second block 20 . The first block 10 faces the second block 20 and is fixed to the second block 20 with bolts (not shown).

The first block 10 is formed of stainless steel. However, the 1st block 10 may be formed with materials other than stainless steel. Examples of materials other than stainless steel include ceramics and cemented carbide.

The shape of the first block 10 is a columnar shape extending in the direction X. The width of the first block 10 is determined according to the width of the coating film, for example. It is preferable that the width|variety of the 1st block 10 exists in the range of 20 mm - 400 mm. The width|variety of the 1st block 10 may exist in the range of 20 mm - 200 mm. The width|variety of the 1st block 10 may exist in the range of 50 mm - 100 mm. The width of the first block 10 means the distance from end to end of the first block 10 along the direction X.

The first block 10 includes a front end surface 10a, an inner surface 10b, and an outer surface 10c. In the coating method using the slot die 100, the front end surface 10a faces the coating object (not shown). The front end face 10a is provided at the front end of the first block 10 and faces the direction Z. The front end face 10a extends in the direction X. The inner surface 10b defines the slit 40 . The inner surface 10b faces the direction Y. The inner surface 10b extends in the direction X and the direction Z. The outer surface 10c has a first groove 11 and a second groove 12 . The outer surface 10c faces in a direction opposite to the direction Y. That is, the outer surface 10c is an outer surface of the slot die 100 . The outer surface 10c extends in the direction X and the direction Z.

The first block 10 includes a tip portion 10d partitioned by a first groove 11 and a second groove 12 . As will be described later, the front end 10d of the first block 10 can be deformed starting from the bottom 11a of the first groove 11 by the adjustment mechanism 30 . The number of tip portions 10d partitioned by one first groove 11 and two second grooves 12 is ten. However, the number of tip portions 10d partitioned by one first groove 11 and two second grooves 12 is not limited to ten. The number of tip portions 10d partitioned by one first groove 11 and two second grooves 12 depends on the width of the first block 10, the number of adjustable mechanisms 30 that can be installed, and requirements. You may change according to the uniformity of the coating film thickness to become.

The 1st groove|channel 11 divides the tip part 10d of the 1st block 10 in direction X and the direction Y, and improves the mobility of the tip part 10d of the 1st block 10. When viewed from the XZ plane of the slot die 100, the first grooves 11 extend in the direction X, that is, in the width direction of the slot die 100. Specifically, the first groove 11 extends from the end to the end of the width of the slot die 100 . When viewed from the XZ plane of the slot die 100, the first groove 11 is parallel to the front end face 10a of the first block 10, that is, the front end of the slot die 100. When the first groove 11 is parallel to the front end of the slot die 100 when viewed in the XZ plane of the slot die 100, the unevenness of the movable range of the front end 10d of the first block 10 is reduced, and the width The uniformity of the coating film thickness in the direction is improved. Also, the first groove 11 extends from the outer surface 10c toward the slit 40 . 2, the shape of the bottom part 11a of the 1st groove|channel 11 is circular. When the shape of the bottom portion 11a of the first groove 11 is circular, the mobility of the tip portion 10d of the first block 10 is improved. However, the shape of the bottom portion 11a of the first groove 11 is not limited to a circular shape, and may be a polygonal shape such as a quadrangle.

The width of the first groove 11 is preferably in the range of 0.1 mm to 20 mm, more preferably in the range of 0.5 mm to 10 mm, and particularly preferably in the range of 1 mm to 5 mm. As the width of the first groove 11 increases, the mobility of the front end 10d of the first block 10 improves. As the width of the first groove 11 decreases, the rigidity of the first block 10 improves. The width of the first groove 11 means the shortest distance from end to end of the first groove 11 along the direction Z when viewed from the XZ plane of the slot die 100 .

The depth of the first groove 11 is determined, for example, according to the thickness of the first block 10 and the mobility of the front end 10d of the first block 10 . It is preferable that the depth of the 1st groove|channel 11 exists in the range of 10 mm - 180 mm, and it is more preferable that it exists in the range of 20 mm - 80 mm. As the depth of the first groove 11 increases, the mobility of the front end 10d of the first block 10 improves. As the depth of the first groove 11 decreases, the rigidity of the first block 10 improves. The preferable range of the maximum depth of the first groove 11 is the same as the preferable range of the depth of the first groove 11 described above.

[ Depth of first groove 11]/[width of first groove 11]) is preferably in the range of 2 to 20, and more preferably in the range of 5 to 15. The ratio of the maximum depth of the first groove 11 to the width of the first groove 11 (that is, [maximum depth of the first groove 11] / [width of the first groove 11]) is It is the same as the preferred range of [the depth of the first groove 11]/[the width of the first groove 11] described.

The second groove 12 divides the tip 10d of the first block 10 in the direction Y and Z, and reduces the effect of deformation of a predetermined tip 10d on the other tip 10d. can As a result, the uniformity of the coating film thickness in the width direction is improved. The second groove 12 intersects the first groove 11 at right angles and extends from the first groove 11 toward the front end surface 10a. That is, when viewed from the XZ plane of the slot die 100, the angle formed by the first groove 11 and the second groove 12 is 90°. However, the angle formed by the first groove 11 and the second groove 12 is not limited to 90°. The angle formed by the first groove 11 and the second groove 12 may be in the range of 85° to 95°. The angle formed by the first groove 11 and the second groove 12 may be in the range of 87° to 93°. The angle formed by the first groove 11 and the second groove 12 may be 89° to 91°. As the angle formed by the first groove 11 and the second groove 12 approaches 90°, the controllability of the slit 40 at the tip of the slot die 100 improves, and the The uniformity of the coating film thickness is improved. Similarly to the first groove 11, the second groove 12 extends from the outer surface 10c toward the slit 40.

The width of the second groove 12 is preferably in the range of 0.1 mm to 20 mm, more preferably in the range of 0.5 mm to 10 mm, and particularly preferably in the range of 1 mm to 5 mm. As the width of the second groove 12 increases, the distance between two adjacent tip portions 10d increases, and the effect of deformation of a predetermined tip portion 10d on the other tip portion 10d is reduced. As a result, the uniformity of the coating film thickness in the width direction is improved. As the width of the second groove 12 decreases, the number of second grooves 12 that can be formed in the first block 10 increases. As the number of the second grooves 12 increases, the number of locations for adjusting the width of the slit 40 at the tip of the slot die 100 increases, and the coating film thickness in the width direction is finely adjusted. As a result, the uniformity of the coating film thickness in the width direction is improved. The width of the second groove 12 means the shortest distance from end to end of the second groove 12 along the direction X when viewed from the XZ plane of the slot die 100.

The ratio of the width of the second groove 12 to the width of the first groove 11 in terms of the movability of the front end portion 10d and the controllability of the width of each slit 40 divided into the second groove portion 12. (That is, [width of second groove 12]/[width of first groove 11]) is preferably in the range of 0.2 to 5, more preferably in the range of 0.5 to 3, and 0.7 to 3. It is particularly preferable to be within the range of 1.5.

The depth of the second groove 12 is determined, for example, according to the thickness of the first block 10 and the mobility of the front end 10d of the first block 10. The depth of the second groove 12 is preferably in the range of 10 mm to 180 mm, and more preferably in the range of 20 mm to 80 mm. As the depth of the second groove 12 increases, the effect of the deformation of a predetermined end portion 10d on the other end portions 10d is reduced, and the uniformity of the coating film thickness in the width direction is improved. As the depth of the second groove 12 decreases, the rigidity of the first block 10 improves. The preferable range of the maximum depth of the second groove 12 is the same as the preferable range of the depth of the second groove 12 described above.

From the viewpoint of the uniformity of the thickness of the coating film in the width direction and the rigidity of the first block 10, the ratio of the depth of the second groove 12 to the width of the second groove 12 (that is, [the second groove The depth of (12)/[the width of the second groove 12]) is preferably in the range of 2 to 20, and more preferably in the range of 5 to 15. The ratio of the maximum depth of the second groove 12 to the width of the second groove 12 (that is, [maximum depth of the second groove 12]/[width of the second groove 12]) is It is the same as the preferred range of [the depth of the second groove 12]/[the width of the second groove 12] described.

From the viewpoint of the uniformity of the coating film thickness in the width direction, the distance between the second grooves 12 is preferably within the range of 10 mm to 100 mm, more preferably within the range of 15 mm to 50 mm, and within the range of 25 mm to 35 mm. is particularly preferred. In addition, it is preferable that the space|interval of the 2nd groove|channel 12 be equal. The distance between the second grooves 12 means the distance between two adjacent second grooves 12 when viewed from the XZ plane of the slot die 100 .

The number of second grooves 12 extending from the first groove 11 toward the front end surface 10a is eleven. However, the number of second grooves 12 is not limited to 11. The number of the second grooves 12 may be changed according to the width of the first block 10, the number of adjustable mechanisms 30 that can be installed, and the required uniformity of the coating film thickness. As the number of the second grooves 12 increases, the number of tip portions 10d partitioned by the first grooves 11 and the second grooves 12 increases, and the slits 40 at the tip of the slot die 100 The number of adjustment points of the width of is increased. As a result, the coating film thickness in the width direction is finely adjusted, and the uniformity of the coating film thickness in the width direction is improved.

As a manufacturing method of the 1st block 10, forging, casting, and a cutting process are mentioned, for example. The first groove 11 and the second groove 12 may be formed in the process of forging or casting. The first groove 11 and the second groove 12 may be formed by cutting.

(2nd block)

The second block 20 defines the slit 40 and the manifold 50 together with the first block 10 . The second block 20 faces the first block 10 and is fixed to the first block 10 with bolts (not shown).

The second block 20 is formed of stainless steel. However, the 2nd block 20 may be formed with materials other than stainless steel. As materials other than stainless steel, materials other than the stainless steel illustrated in description of the component of the 1st block 10 are mentioned, for example. The second block 20 preferably includes the same components as those included in the first block 10 .

The shape of the second block 20 is a columnar shape extending in the direction X. The second block 20 has the same width as the first block 10 . The preferable range of the width of the second block 20 is the same as the preferable range of the width of the first block 10 described above.

As a manufacturing method of the 2nd block 20, forging, casting, and a cutting process are mentioned, for example.

(adjustment mechanism)

The adjustment mechanism 30 changes the width of the first groove 11, and uses the change in width of the first groove 11 to change the width of the slit 40 at the front end of the slot die 100. Adjust the As will be described later, the adjusting mechanism 30 changes the width of the first groove 11 by pushing and pulling the second adjusting portion 32 according to the rotation of the bolt 33 . The adjustment mechanism 30 is arranged along the first groove 11 on the outer surface 10c of the first block 10 . The 2nd groove|channel 12 is arrange|positioned between two adjacent adjustment mechanisms 30. That is, the adjusting mechanism 30 and the second groove 12 are alternately arranged along the direction X, ie, the width direction of the slot die 100 .

The number of adjustment mechanisms 30 is ten. However, the number of adjustment mechanisms 30 is not limited to 10. The number of adjustment mechanisms 30 may be changed according to the number of tip portions 10d of the first block 10 partitioned by the first groove 11 and the second groove 12 . As the number of adjustment mechanisms 30 increases, the coating film thickness in the width direction is finely adjusted. As a result, the uniformity of the coating film thickness in the width direction is improved.

The adjustment mechanism 30 includes a first adjustment unit 31 , a second adjustment unit 32 , and a bolt 33 .

The first adjustment unit 31 and the second adjustment unit 32 constitute a pair of adjustment units. The 1st adjustment part 31 and the 2nd adjustment part 32 are arrange|positioned adjacently on the outer surface 10c of the 1st block 10, with the 1st groove|channel 11 interposed therebetween. The 2nd adjustment part 32 is in contact with the tip part 10d of the 1st block 10 partitioned by one 1st groove|channel 11 and two 2nd groove|channel 12. The 1st adjustment part 31 and the 2nd adjustment part 32 are being fixed to the outer surface 10c of the 1st block 10 by the bolt (not shown). However, the 1st adjustment part 31 and the 2nd adjustment part 32 may be fixed to the 1st block 10 with fasteners other than a bolt. The 1st adjustment part 31 and the 2nd adjustment part 32 may be fixed to the 1st block 10 by methods other than the method using a fixture. The 1st adjustment part 31 and the 2nd adjustment part 32 are formed of stainless steel. However, the 1st adjustment part 31 and the 2nd adjustment part 32 may be formed with materials other than stainless steel. As materials other than stainless steel, materials other than the stainless steel illustrated in description of the component of the 1st block 10 are mentioned, for example. The shape of the 1st adjustment part 31 and the 2nd adjustment part 32 is a square pillar. However, the shape of the 1st adjustment part 31 and the 2nd adjustment part 32 may be shapes other than a square columnar shape. The 1st adjustment part 31 contains a female screw part. The female screw part of the 1st adjustment part 31 is formed in the inner peripheral surface which defines the screw hole of the 1st adjustment part 31. The second adjustment part 32 includes a female screw part. The female screw portion of the second adjusting portion 32 is formed on an inner circumferential surface defining a screw hole of the second adjusting portion 32 .

The bolt 33 is a screw that changes the width of the first groove 11 . Specifically, the bolt 33 is a type of differential screw, and pushes and pulls the second adjustment unit 32 using a difference in pitch of the screw thread. As will be described later, the width of the first groove 11 affects the width of the slit 40 at the front end of the slot die 100 . The bolt 33 is disposed through the first adjusting portion 31 and is inserted into the second adjusting portion 32 . Specifically, the bolt 33 is inserted into the screw hole of the second adjuster 32 through the screw hole of the first adjuster 31 . The bolt 33 may be disposed through both the first adjusting portion 31 and the second adjusting portion 32 . The bolt 33 includes a first male screw part engaged with the female screw part of the first adjusting part 31 and a second male screw part engaged with the female screw part of the second adjusting part 32 . In the bolt 33, the pitch of the first male threaded portion is different from the pitch of the second male threaded portion. The "pitch of the male threaded portion" means the interval between two adjacent threads of the male threaded portion. The absolute value of the difference between the pitch of the first external thread portion and the pitch of the second external thread portion may be 0.1 mm or more, 0.15 mm or more, or 0.2 mm or more. The absolute value of the difference between the pitch of the first male thread part and the pitch of the second male thread part is preferably in the range of 0.1 mm to 0.6 mm, more preferably in the range of 0.15 mm to 0.5 mm, and 0.2 mm to 0.4 mm What is within the range is particularly preferred. In the bolt 33, it is preferable that the outer diameter of the first male threaded portion is larger than the outer diameter of the second male threaded portion. The bolt 33 extends in the direction Z and can rotate with a virtual straight line along the direction Z as a rotation axis. The bolt 33 can move in direction Z or in a direction opposite to direction Z while rotating. The movement direction and amount of movement of the bolt 33 are adjusted according to the rotation direction and amount of rotation of the bolt 33 . Depending on the direction and amount of rotation of the bolt 33, the force by which the bolt 33 pushes or pulls the second adjusting portion 32 changes, and the width of the first groove 11 is adjusted. The bolt 33 is formed of stainless steel. However, the bolt 33 may be formed of materials other than stainless steel. As materials other than stainless steel, materials other than the stainless steel illustrated in description of the component of the 1st block 10 are mentioned, for example.

(slit)

The slit 40 is a space through which fluid is discharged toward the object to be coated. The slit 40 is defined by the first block 10 and the second block 20 . The slit 40 extends in the direction X and the direction Z, and forms a discharge port at the tip of the slot die 100 . The width of the slit 40 at the front end of the slot die 100 is determined depending on the flow rate and viscosity of the coating liquid, for example. The width of the slit 40 at the front end of the slot die 100 is preferably in the range of 0.3 mm to 0.8 mm. The width of the slit 40 at the tip of the slot die 100 means the distance from end to end of the slit 40 along the direction Y when viewed in the XY plane of the tip of the slot die 100.

(manifold)

The manifold 50 is a space for storing fluid objects. The manifold 50 is defined by the first block 10 and the second block 20 . The manifold 50 communicates with the slit 40 . The fluid accumulated in the manifold 50 moves in the direction Z and is discharged through the slit 40 . When viewed from the XZ plane of the slot die 100, the manifold 50 extends in the direction X, that is, in the width direction of the slot die 100. 2, the shape of the manifold 50 is substantially trapezoidal. The shape of the manifold 50 corresponds to the shape of the substantially trapezoidal concave portion formed in the second block 20 . However, the shape of the manifold 50 may be other than a substantially trapezoidal shape. The shape of the manifold 50 may be semicircular. The shape of the manifold 50 may be circular. A circular manifold is defined by a combination of, for example, a semicircular concave portion formed in the first block 10 and a semicircular concave portion formed in the second block 20 .

(How to adjust the width of the slit)

Referring to FIG. 2 , a method for adjusting the width of the slit 40 at the front end of the slot die 100 will be described. The front end portion 10d of the first block 10 partitioned by the first groove 11 and the second groove 12 may be deformed starting from the bottom portion 11a of the first groove 11. 2, when the bolt 33 pushes the second adjusting part 32 increases as the bolt 33 rotates (in other words, when the distance between the first adjusting part 31 and the second adjusting part 32 increases) ), the front end 10d of the first block 10 in contact with the second adjustment unit 32 is deformed in a counterclockwise direction starting from the bottom 11a of the first groove 11, the width increases As a result, the width of the slit 40 at the front end of the slot die 100 is reduced. On the other hand, as the bolt 33 rotates, when the force of the bolt 33 pulling the second adjusting portion 32 increases (in other words, when the distance between the first adjusting portion 31 and the second adjusting portion 32 decreases), The front end 10d of the first block 10 in contact with the second adjusting portion 32 is deformed clockwise starting from the bottom 11a of the first groove 11, so that the width of the first groove 11 is small. lose As a result, the width of the slit 40 at the front end of the slot die 100 is increased. Through the above operation, the width of the slit 40 at the front end of the slot die 100 is adjusted. In addition, with respect to two adjacent tip portions 10d with the second groove 12 interposed therebetween, the second groove 12 has a force applied to one tip portion 10d by the adjustment mechanism 30 to the other. can be suppressed from being transferred to the front end 10d. That is, even if a predetermined tip portion 10d is deformed by the adjusting mechanism 30, other tip portions 10d located near the tip portion 10d are hardly deformed. As a result, the plurality of adjustment mechanisms 30 arranged along the direction X can each independently adjust the width of the slit 40 at a desired point, improving the uniformity of the coating film thickness in the width direction. .

(application method)

Referring to FIG. 3, an application method using the slot die 100 will be described. Fig. 3 is a schematic diagram for explaining an application method using the slot die shown in Figs. 1 and 2; According to the application method shown in FIG. 3, a multilayer film is obtained.

The film F, which is an object to be applied, is conveyed by a roll to roll method. A slot die 100 and a drying device 200 are provided in the middle of the transport route of the film F.

As a component of the film F, a polymer and a metal are mentioned, for example. As a polymer, a polyethylene terephthalate, a polyethylene naphthalate, and triacetyl cellulose are mentioned, for example. The film F may also contain 1 type, or 2 or more types of polymers. As a metal, iron, chromium, nickel, titanium, copper, aluminum, silver, and gold are mentioned, for example. The metal may be an alloy. As an alloy, stainless steel and invar are mentioned, for example. The film F may also contain 1 type, or 2 or more types of metal. In one embodiment, the film F preferably contains a polymer, and more preferably contains at least one selected from the group consisting of polyethylene terephthalate, polyethylene naphthalate, and triacetyl cellulose. Specific examples of the film (F) containing the polymer include a film made of polyethylene terephthalate, a film made of polyethylene naphthalate, and a film made of triacetyl cellulose. In one embodiment, the film F preferably contains a metal, and more preferably contains at least one selected from the group consisting of nickel, titanium, copper, aluminum, silver and gold, and copper and It is more preferable to include at least one selected from the group consisting of aluminum, and it is particularly preferable to include aluminum. As a specific example of the film F containing a metal, a copper film and an aluminum film are mentioned.

The film F may have high thermal conductivity. As a film (F) which has high thermal conductivity, the film (F) which has a thermal conductivity of 200 W/(m*K) or more is mentioned, for example. The upper limit of the thermal conductivity of the film F is not limited. The thermal conductivity of the film F may be 500 W/(m·K) or less. The thermal conductivity of the film F is measured using a laser flash method. First, the film F is cut out along the width direction at three locations (specifically, a position of 5 mm from both ends in the width direction and a central portion in the width direction), φ 5 mm to 10 mm, and three measurement samples are obtained. The thermal conductivity of each measurement sample is measured using a thermal property measuring device (for example, LFA-502, manufactured by Kyoto Denshi Kogyo Co., Ltd.) to which the laser flash method is applied. The arithmetic average of the three measured values is taken as the thermal conductivity of the film (F).

The layer structure of the film F is not limited. The film F may have a single layer structure or a multilayer structure.

From the viewpoint of improving productivity, the film F is preferably a long film. The length of the film F is preferably 10 m or more, more preferably 100 m or more, and particularly preferably 200 m or more. The upper limit of the length of the film F is not limited. The upper limit of the length of the film F may be 1,000 m or 500 m. The length of the film F is normally in the range of 10 m - 1,000 m. "The length of the film F" means the distance from the end to the end of the film F in the conveyance direction of the film F.

The width of the film F is not limited. From the viewpoint of improving productivity, the width of the film F is preferably in the range of 100 mm to 2,000 mm.

The thickness of the film F is not limited. From the viewpoint of material cost, the thickness of the film F is preferably in the range of 3 μm to 50 μm, and more preferably in the range of 10 μm to 30 μm.

It is preferable that the conveyance speed of the film F exists in the range of 1 m/min - 100 m/min.

The tension of the film F is preferably in the range of 10 N/m to 500 N/m, and more preferably in the range of 50 N/m to 200 N/m. Control of the tension is performed using a known tension control device, for example. Control of the tension may be performed using a known conveying device including a tension control mechanism. As a conveyance apparatus containing a tension control mechanism, the conveyance apparatus containing a tension drive roller (Tendency drive roller) is mentioned, for example. The tension driven roller is rotated by, for example, frictional force or magnetic force acting between the rotation shaft supporting the tension driven roller and the tension driven roller. The rotating shaft is rotated by, for example, a motor. That is, the force for rotating the rotating shaft is transmitted to the tension drive type roller, and the tension drive type roller rotates. The conveying device including the tension-driven roller can control the tension of the film according to the number of rotations of the rotation shaft, for example. A technology related to a tension driven roller is described in Japanese Patent Publication No. 4066904, for example. The content of the said document is incorporated into this specification by reference.

3, the slot die 100 discharges the coating liquid toward the conveyed film F. The coating liquid is supplied to the slot die 100 from a container (not shown) storing the coating liquid.

The type of coating liquid is not limited. It is preferable that the coating liquid is an aqueous coating liquid. "Water-based coating liquid" means a coating liquid in which the solvent contained in the coating liquid is substantially water. "The solvent contained in the coating liquid is substantially water" means that water occupies most of the solvent contained in the coating liquid. The ratio of water to the solvent contained in the water-based coating liquid is preferably 90% by mass or more, more preferably 95% by mass or more, and particularly preferably 100% by mass.

As water contained in an aqueous coating liquid, natural water, purified water, distilled water, ion-exchanged water, pure water, and ultrapure water are mentioned, for example.

It is preferable that it is 40 mass % or more with respect to the total mass of an aqueous coating liquid, and, as for the content rate of the water in an aqueous coating liquid, it is more preferable that it is 50 mass % or more. It is preferable that it is less than 100 mass % with respect to the total mass of an aqueous coating liquid, and, as for the content rate of the water in an aqueous coating liquid, it is more preferable that it is 80 mass % or less.

The water-based coating liquid may also contain particles. Examples of the particles include inorganic particles, organic particles, and composite particles of inorganic and organic substances.

Examples of the inorganic particles include metal particles, semimetal particles, metal compound particles, semimetal compound particles, inorganic pigment particles, mineral particles, and polycrystalline diamond particles. Examples of the metal include alkali metals, alkaline earth metals, transition metals, and alloys thereof. As a semimetal, silicon is mentioned, for example. Examples of the metal compound and semimetal compound include oxides, hydroxides and nitrides. As an inorganic pigment, carbon black is mentioned, for example. As a mineral, mica is mentioned, for example.

Examples of organic particles include resin particles and organic pigment particles.

As the composite particles of inorganic and organic substances, for example, composite particles in which inorganic particles are dispersed in a matrix of organic substances, composite particles in which the periphery of organic particles is coated with an inorganic substance, and the peripheries of inorganic particles are coated with organic substances One composite particle may be mentioned.

In order to impart dispersibility, the particles may be subjected to surface treatment. Composite particles may be formed by surface treatment.

The particle size, specific gravity and use form of the particles are not limited. The particle size, specific gravity and use form of the particles are determined, for example, depending on the coating film formed by the coating liquid and the manufacturing conditions of the coating film.

The water-based coating liquid may also contain 1 type, or 2 or more types of particle|grains.

The content of the particles in the water-based coating liquid is not limited. The content of the particles in the aqueous coating liquid is determined depending on, for example, the purpose of adding the particles, the coating film formed by the coating liquid, and the conditions for producing the coating film.

Examples of the components of the aqueous coating solution include binder components, components contributing to particle dispersibility, polymerizable compounds, polymerization initiators, and components (eg, surfactants) for enhancing coating performance.

It is preferable that it is less than 70 mass %, and, as for the solid content concentration of a coating liquid, it is more preferable that it is 30 mass % - 60 mass %.

The thickness of the coating liquid applied to the film F (hereinafter sometimes referred to as "thickness of the liquid film") is not limited. The thickness of the liquid film may be in the range of 10 μm to 200 μm. The thickness of the liquid film may be in the range of 20 μm to 100 μm.

3, the drying apparatus 200 dries the coating liquid applied to the film F. A multilayer film is obtained by drying the coating liquid. The drying apparatus 200 dries the coating liquid by blowing. The temperature of the gas during blowing is preferably in the range of 25°C to 200°C, and more preferably in the range of 30°C to 150°C. It is preferable that the wind speed in blowing is 1.5 m/sec - 50 m/sec. As a drying apparatus used for drying of a coating liquid, an oven, a warm air machine, and an infrared heater are mentioned, for example.

The use of the multilayer film obtained by the above method is not limited.

<Slot die according to the second embodiment>

Referring to FIG. 4, a slot die according to a second embodiment of the present disclosure will be described. 4 is a schematic side view showing a slot die according to a second embodiment of the present disclosure. The slot die 110 shown in FIG. 4 includes the same components as those of the slot die 100 described above, except that the adjustment mechanism 60 is applied instead of the adjustment mechanism 30. Hereinafter, the slot die 110 will be described in detail. However, in the description of the slot die 110 below, contents overlapping with the slot die 100 are omitted.

The arrangement of the adjustment mechanisms 60 is the same as the arrangement of the adjustment mechanisms 30 described above, and the number of the adjustment mechanisms 60 is the same as the number of the adjustment mechanisms 30 described above.

The adjustment mechanism 60 includes a first adjustment unit 61 , a second adjustment unit 62 , and a bolt 63 .

The first adjusting portion 61 includes a female screw portion. The female screw part of the 1st adjustment part 61 is formed in the inner peripheral surface which defines the screw hole of the 1st adjustment part 61.

The bolt 63 is a screw that changes the width of the first groove 11 . The bolt 63 is disposed through the first adjusting portion 61 . The bolt 63 includes a male screw portion engaged with the female screw portion of the first adjusting portion 61 and a front end surface that contacts the second adjusting portion 62 . The front end face of the bolt 63 faces the second adjusting portion 62 . The front end surface of the bolt 63 can contact the second adjusting portion 62 and apply force to the second adjusting portion 62 . The bolt 63 extends in the direction Z and can rotate with a virtual straight line along the direction Z as a rotation axis. The bolt 63 can move in direction Z or in the opposite direction to direction Z while rotating. The movement direction and amount of movement of bolt 63 are adjusted according to the rotation direction and amount of rotation of bolt 63 . Depending on the rotation direction and amount of rotation of the bolt 63, the force by which the bolt 63 pushes the second adjusting portion 62 is changed, so that the width of the first groove 11 is adjusted.

A method for adjusting the width of the slit 40 at the front end of the slot die 110 will be described. Adjustment of the width of the slit 40 is carried out by bringing the front end surfaces of some or all of the bolts 63 into contact with the second adjusting portion 63 . In addition, as long as the width of the slit 40 is set within the target range, the front end faces of all the bolts 63 do not have to come into contact with the second adjusting portion 63. When the force of the bolt 63 pushing the second adjusting part 62 increases as the bolt 63 rotates, the front end 10d of the first block 10 in contact with the second adjusting part 62 moves to the first groove 11 ) is deformed in a counterclockwise direction starting from the bottom portion 11a, and the width of the first groove 11 increases. As a result, the width of the slit 40 at the front end of the slot die 110 is reduced. On the other hand, when the force of the bolt 63 pushing the second adjusting part 62 decreases as the bolt 63 rotates, the front end 10d of the first block 10 in contact with the second adjusting part 62 moves to the first The groove 11 is deformed in a clockwise direction starting from the bottom 11a, so that the width of the first groove 11 is reduced. As a result, the width of the slit 40 at the tip of the slot die 110 is increased. By the above operation, the width of the slit 40 at the front end of the slot die 110 is adjusted.

<Example of modification>

In the first embodiment described above, the screw for changing the width of the first groove is inserted into the first adjustment unit and the second adjustment unit in this order. In a modified example, the screw for changing the width of the first groove may be inserted into the second adjustment unit and the first adjustment unit in this order. That is, an adjustment mechanism including a screw disposed through the second adjustment unit and inserted into the first adjustment unit may be used.

In the first embodiment described above, the screw for changing the width of the first groove is screwed into the second adjustment unit. That is, the male threaded portion of the screw that changes the width of the first groove is engaged with the female threaded portion of the second adjusting portion. In a modified example, an adjustment mechanism including a screw that is fitted into the second adjustment unit by means other than screwing to the second adjustment unit and pushes and pulls the second adjustment unit may be used. Examples of the screw that pushes and pulls the second adjustment unit include a screw including a diameter-expanded portion fitted to the second adjustment unit. In the enlarged diameter portion, the outer diameter of the screw is increased. The outer diameter of the enlarged diameter portion may increase linearly or nonlinearly toward the tip of the screw. The second adjustment unit may be pushed and pulled by fitting the diameter expansion unit of the screw into a space having a shape corresponding to the shape of the diameter expansion unit of the screw provided inside the second adjustment unit. Further, as the screw that pushes and pulls the second adjuster, a screw including a constriction portion fitted to the second adjuster is also exemplified. In the constricted portion, the outer diameter of the screw becomes smaller. The second adjustment unit may be pushed and pulled by fitting the constriction of the screw into a space having a shape corresponding to the shape of the constriction of the screw provided inside the second adjustment unit. It is preferable that the screw pushing and pulling the second adjustment unit includes a front end surface that contacts the second adjustment unit.

In the second embodiment described above, the screw for changing the width of the first groove is disposed penetrating the first adjustment unit, and the front end surface of the screw is in contact with the second adjustment unit. In a modified example, an adjusting mechanism including a screw disposed through the second adjusting portion and having a front end surface in contact with the first adjusting portion may be used. In the above modified example, the width of the first groove is adjusted by changing the force with which the screw pushes the first adjusting portion.

In each embodiment described above, the screw for changing the width of the first groove moves the front end of the first block partitioned by the first groove and the second groove through the second adjusting portion. In a modified example, an adjusting mechanism that directly moves the front end of the first block partitioned by the first groove and the second groove to change the width of the first groove may be used.

In each of the embodiments described above, an adjusting mechanism that changes the width of the first groove using the rotation of the screw is used. In a modification, an adjustment mechanism including a thermally expandable member may be used. The volume of the thermally expanding member changes with temperature. The width of the first groove 11 is adjusted by changing the volume of the thermally expandable member according to the temperature. As a member which thermally expands, a heat bolt is mentioned, for example. The technology related to the heat bolt is described in, for example, Japanese Unexamined Patent Publication No. 2020-152097 and Japanese Unexamined Patent Publication No. 2017-159490.

In each of the embodiments described above, an adjusting mechanism that changes the width of the first groove by hydraulic drive or electric drive may be used.

In each embodiment described above, the first block may be formed by combining a plurality of members. The first groove and the second groove may be formed by combining a plurality of members constituting the first block, for example. In each embodiment described above, the second block may also be formed by combining a plurality of members.

Example

Hereinafter, the present disclosure will be described in detail by way of examples. However, the present disclosure is not limited to the following examples.

<Example 1>

(Preparation of Film AL1)

As film AL1, an aluminum film having a width of 380 mm, a thickness of 10 μm, a length of 300 m, and a thermal conductivity of 230 W/(m·K) was prepared. Film AL1 is wound up in a roll shape to form a roll film.

(Preparation of coating liquid A)

The following components were mixed to prepare coating liquid A.

Polyvinyl alcohol (CKS-50, saponification degree: 99 mol%, polymerization degree: 300, Nippon Kosei Chemical Industry Co., Ltd.): 58 parts by mass

・Celogen PR (Daiichi Kogyo Seiyaku Co., Ltd.): 24 parts by mass

・Surfactant (Nippon Emulsion Co., Ltd., Emarex 710): 5 parts by mass

・Water product of Art Pearl (registered trademark) J-7P: 913 parts by mass

The aqueous product of Art Pearl J-7P was prepared by the following method. To 74 parts by mass of pure water, 3 parts by mass of Emarex 710 (Nippon Emulsion Co., Ltd., nonionic surfactant) and 3 parts by mass of carboxymethylcellulose sodium (Daiichi Kogyo Seiyaku Co., Ltd.) were added. To the obtained aqueous solution, 20 parts by mass of Art Pearl J-7P (Negami Kogyo Co., Ltd., silica composite crosslinked acrylic resin fine particles) was added, and 10,000 rpm (revolutions per minute) using an ace homogenizer (Nippon Seiki Seisakusho Co., Ltd.) ) for 15 minutes to obtain an aqueous product of Art Pearl J-7P (particle concentration: 20% by mass). The true specific gravity of the silica composite crosslinked acrylic resin fine particles in the obtained water product was 1.20, and the average particle diameter of the fine particles was 6.5 μm.

(Preparation of slot die)

By casting and cutting, a first block and a second block having shapes as shown in Figs. 1 and 2 were obtained. After connecting the obtained 1st block and 2nd block with bolts to each other, the adjustment mechanism containing the component as shown in FIG. 1 and FIG. 2 was provided on the 1st block. The bolt of the adjustment mechanism is a differential screw including a male screw portion having an outer diameter of 8 mm and a pitch of 1.25 mm, and a male screw portion having an outer diameter of 10 mm and a pitch of 1.5 mm, and the movement distance of the bolt per rotation is 0.25 mm. The former male threaded portion is engaged with the female threaded portion of the second adjusting portion, and the latter male threaded portion is engaged with the female threaded portion of the first adjusting portion. A slot die was obtained by the above procedure. The dimensions of the slot die are shown below.

Width of slot die: 350mm

Width of the slit at the tip of the slot die: 0.5 mm

Width of the first groove: 4 mm

Depth of the first groove: 30 mm

Width of the second groove: 4 mm

Maximum depth of the second groove: 30 mm

Spacing of the second groove: 30 mm

(manufacture of multi-layer film)

Coating liquid A was apply|coated to film AL1 using the manufacturing apparatus containing the component as shown in FIG. 3, and then the coating liquid was dried. The conveyance speed of film AL1 is 30 m/min. By the above procedure, a multilayer film was obtained.

<Example 2>

A multilayer film was obtained in the same procedure as in Example 1, except that the configuration of the slot die was changed according to the description in Table 1.

<Comparative Examples 1 to 3>

A multilayer film was obtained in the same procedure as in Example 1, except that the configuration of the slot die was changed according to the description in Table 1.

<evaluation>

(Uniformity of Coating Film Thickness in the Width Direction)

Using a film thickness meter (SI-T90, Keyence Corporation), the coating film thickness in the width direction of the multilayer film was measured at 10 locations at intervals of 5 mm. Distribution T of the coating film thickness in the width direction of the obtained multilayer film was calculated and evaluated according to the following criteria. Table 1 shows the evaluation results.

A: T≤2%

B: 2%<T<4%

C: 4%≤T<6%

D: 6%≤T

[Table 1]

Table 1 shows that the uniformity of the coating film thickness in Examples 1-2 is superior to the uniformity of the coating film thickness in Comparative Examples 1-3.

The disclosure of Japanese Patent Application No. 2020-210534 filed on December 18, 2020 is incorporated herein by reference. All documents, patent applications, and technical specifications described in this specification are incorporated herein by reference to the same extent as when each individual document, patent application, and technical specification is specifically incorporated by reference and is individually described. do.

10: first block
10a: end surface
10b: inside
10c: turn away
10d: distal end
11: first groove
11a: bottom
12: second groove
20: second block
30: adjustment mechanism
31, 61: first adjustment unit
32, 62: second adjustment unit
33, 63: bolt
40: slit
50: manifold
100, 110: slot die
200: drying device
F: film

Claims (6)

A slot die including a slit for discharging a fluid toward an application target,
A front end surface facing the coating object, an inner surface defining the slit, a first groove extending in the width direction of the slot die, and at least extending from the first groove toward the front end surface while intersecting the first groove A block comprising an outer surface having one second groove;
and at least one adjustment mechanism for adjusting the width of the slit by changing the width of the first groove. The method of claim 1,
The slot die, wherein the adjustment mechanism includes a screw for changing the width of the first groove. The method of claim 1,
The adjustment mechanism comprises a pair of adjustment units including a first adjustment unit and a second adjustment unit disposed adjacent to each other with the first groove interposed therebetween on the outer surface of the block; and the first adjustment unit in the pair of adjustment units. A screw disposed penetrating the adjustment unit and including a front end surface in contact with the second adjustment unit in the pair of adjustment units, wherein the screw applies force to the second adjustment unit to determine the width of the first groove to change the slot die. The method of claim 1,
The adjustment mechanism comprises a pair of adjustment units including a first adjustment unit and a second adjustment unit disposed adjacent to each other with the first groove interposed therebetween on the outer surface of the block; and the first adjustment unit in the pair of adjustment units. A slot die disposed through the adjusting portion and including a screw inserted into the second adjusting portion of the pair of adjusting portions, wherein the screw pushes and pulls the second adjusting portion to change the width of the first groove. . The method of claim 4,
The first adjusting part includes a female screw part, the second adjusting part includes a female screw part, and the screw comprises a first male screw part engaged with the female screw part of the first adjusting part, and the female screw of the second adjusting part. A slot die, which is a differential screw including a second external threaded portion engaged with the portion. The method according to any one of claims 1 to 5,
The at least one adjustment mechanism includes a plurality of adjustment mechanisms arranged along the first groove on the outer surface of the block, and the at least one second adjustment mechanism is positioned between two adjacent adjustment mechanisms in the plurality of adjustment mechanisms. A slot die in which a second one of the grooves is disposed.

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