WO2023203836A1

WO2023203836A1 - Method and apparatus for producing laminated film

Info

Publication number: WO2023203836A1
Application number: PCT/JP2023/003791
Authority: WO
Inventors: 光洋足利
Original assignee: 株式会社ユポ・コーポレーション
Priority date: 2022-04-21
Filing date: 2023-02-06
Publication date: 2023-10-26

Abstract

This apparatus is provided with: a first coating section (30a) in which a first coating solution is ejected onto a base material layer (101) from a first nozzle row arranged in the direction of the width of the base material layer (101) at a first position that is opposite to the base material layer (101) to form a first coating layer (102a); and a second coating section (30b) in which a second coating solution is ejected onto the surface of the first coating layer from a second nozzle row arranged in the direction of the width of the base material layer (101) at a second position that is located on the downstream side of the first position and is opposite to the first coating layer (102a). According to this configuration, it becomes possible to highly efficiently apply a coating solution that is a mixture of a plurality of solutions onto a laminated film.

Description

Laminated film manufacturing method and manufacturing equipment

The present invention relates to a technology for manufacturing laminated films.

It is known that a coating layer is provided on the surface of a stretched resin film by applying a coating liquid that achieves a specific function, and by drying this layer, a laminated film with various functions is formed on the surface. ing.

In addition, a coating solution containing two or more highly reactive components, such as a polymerizable compound and a polymerization initiator, a coupling agent, and an organic/inorganic compound that reacts with the same, is applied to the film surface to form a coating layer. Formation of a surface layer containing a reaction product has also been carried out by causing the reaction to occur inside the substrate.

A method for applying a coating liquid to a film is, for example, by supplying the liquid to a coating roller and rotating the coating roller in contact with the film in accordance with the conveyance of the film, thereby applying the liquid to the film. Coater is known.

For example, a reverse gravure coater is known as a roll coater. A reverse gravure coater applies a coating liquid to an engraved roll (gravure roll), scrapes the surface of the gravure roll mainly with a blade, and transfers the coating liquid accumulated in the grooves of the engraving onto the film for coating. It is a coater that forms layers.

Japanese Patent Application Publication No. 2006-346534

However, in such conventional methods for producing laminated films, when a coating liquid containing two or more highly reactive components is used, it takes time to prepare the coating liquid and supply it to the coating roller. During this time, the components may react, which may cause problems such as reduced coating properties or deactivation of the components.

One of the objects of the present invention is to efficiently apply a coating liquid containing a plurality of mutually reactive components to a laminated film.

Therefore, this method for manufacturing a laminated film is a method for manufacturing a laminated film in which a coating layer is formed on a base layer, and the method includes transporting the base layer while transporting the first layer facing the base layer. a first coating step of discharging a first coating liquid onto the base layer from a first nozzle array arranged in the width direction of the base layer to form a first coat layer at the position; At a second position downstream of the first position and facing the first coating layer, a second nozzle array arranged in the width direction of the base layer to the first and a second coating step of discharging a second coating liquid onto the surface of the coating layer.

According to one embodiment, when coating a film surface with a coating liquid containing a plurality of mutually reactive components, the mutually reactive components are separately blended into a first and a second coating liquid, and the first By sequentially coating the two components in the second coating step, both components are allowed to react in the coating layer, and a desired coating layer can be obtained. In other words, since it is not necessary to hold multiple mutually reactive components in the same liquid phase for a long time, both components may react before coating, resulting in decreased coating properties or deactivation of components before coating. This makes it possible to efficiently coat the laminated film with a coating liquid containing a plurality of mutually reactive components.

1 is a diagram illustrating a configuration of a laminated film manufacturing system as an example of an embodiment. 1 is a diagram schematically showing a configuration example of a longitudinal stretching device of a laminated film manufacturing system as an example of an embodiment. FIG. 1 is a diagram schematically showing a configuration example of a lateral stretching device of a laminated film manufacturing system as an example of an embodiment. FIG. 1 is a diagram for explaining an inkjet ejection device of a laminated film manufacturing system as an example of an embodiment. FIG. 1 is a diagram illustrating the arrangement of an inkjet ejection device in a laminated film manufacturing system as an example of an embodiment. It is a figure which illustrates the nozzle row of the inkjet head of the inkjet discharge device of the laminated film manufacturing system as an example of embodiment. It is a figure showing an example of arrangement of an inkjet head of an inkjet discharge device of a laminated film production system as an example of an embodiment. It is a figure showing an example of arrangement of an inkjet head of an inkjet discharge device of a laminated film production system as an example of an embodiment. It is a figure showing an example of arrangement of an inkjet head of an inkjet discharge device of a laminated film production system as an example of an embodiment. It is a figure which shows the modification of the inkjet discharge device of the laminated film manufacturing system as an example of embodiment. It is a figure which shows the modification of the inkjet discharge device of the laminated film manufacturing system as an example of embodiment. It is a figure which shows the modification of the inkjet discharge device of the laminated film manufacturing system as an example of embodiment. It is a figure which shows typically the example of arrangement|positioning of an inkjet discharge device in the modification of the laminated film manufacturing system as an example of embodiment.

Hereinafter, embodiments of the method and apparatus for manufacturing the present laminated film will be described with reference to the drawings. However, the embodiments shown below are merely illustrative, and there is no intention to exclude the application of various modifications and techniques not specified in the embodiments. That is, this embodiment can be modified and implemented in various ways without departing from the spirit thereof. Furthermore, each figure is not intended to include only the constituent elements shown in the figure, but may include other functions.

(A) Configuration FIG. 1 is a diagram illustrating the configuration of a laminated film manufacturing system 1 as an example of an embodiment. Although FIG. 1 shows an example in which the base material layer is produced by a sequential biaxial stretching method, the method for producing the base material layer is not limited to this, and for example, a uniaxial stretching method, a non-stretching method, or other methods may be used. It may be produced by a known method.

The laminated film manufacturing system 1 of the present invention produces a laminated film 100. The laminated film 100 has a laminated structure in which a coating layer 102 is formed on a base layer 101. The base layer 101 represents a "cast film layer formed by extruding a resin composition" (hereinafter sometimes simply referred to as a "cast film layer") until the first stretching step is completed, and after the first stretching step, Until the second stretching process is completed, it represents the "first stretched layer", and after the completion of the second stretching process, it represents the "base material layer".

Examples of the material forming the base layer 101, that is, the base material layer, include a resin composition containing a thermoplastic resin.

Examples of thermoplastic resins include olefin polymers, polyamides, polyesters, polycarbonates, polystyrene, poly(meth)acrylates, polyvinyl chloride, and mixed resins thereof. Among these, olefin polymers are preferred from the viewpoint of water resistance and solvent resistance.

As the olefin polymer, propylene polymers such as polypropylene, ethylene polymers such as polyethylene, etc. can be preferably used.

The resin composition may further contain a filler. The filler may be an inorganic filler or an organic filler, and examples of the inorganic filler include calcium carbonate, calcined clay, silica, diatomaceous earth, talc, titanium oxide, barium sulfate, and alumina. The organic filler is preferably an organic particle that is incompatible with the thermoplastic resin, has a melting point or glass transition temperature higher than that of the thermoplastic resin, and is finely dispersed under the melt-kneading conditions of the thermoplastic resin. When the resin is a polyolefin resin, examples of the organic filler include polyethylene terephthalate, polybutylene terephthalate, polycarbonate, nylon-6, nylon-6,6, a cyclic olefin homopolymer, and a copolymer of cyclic olefin and ethylene. It is preferable to use a material having a melting point of 120° C. to 300° C. or a glass transition temperature of 120° C. to 280° C. due to coalescence, etc.

The resin composition may further contain stabilizers, light stabilizers, dispersants, lubricants, optical brighteners, colorants, etc., if necessary.

The base layer 101 may have a single layer structure or a multilayer structure of two or more layers.

The laminated film manufacturing system 1 illustrated in FIG. 1 includes

raw material silos

10a, 10b, a granulator 11, a pellet silo 12, an extruder 13, a longitudinal stretching device 14, a lateral stretching device 16, and

inkjet discharging devices

30a, 30b.

Each of these

raw material silos

10a, 10b, granulator 11, pellet silo 12, extruder 13, longitudinal stretching device 14, lateral stretching device 16, and

inkjet discharging device

30a, 30b, which constitute the laminated film manufacturing system 1, A manufacturing process for manufacturing the laminated film 100 is realized.

Raw materials for the laminated film 100 are stored in the

raw material silos

10a and 10b. Raw materials for the laminated film 100 include, for example, a thermoplastic resin, filler, and optional additives. Although the number of raw material silos in FIG. 1 is two, it is sufficient to provide as many as necessary.

The raw materials for the laminated film 100 may include recycled materials produced by processing scraps generated during the cutting process during molding of the laminated film 100.

The raw materials stored in the

raw material silos

10a and 10b are fed into the granulator 11.

The granulator 11 adds fillers, various additives, and the like to the raw material thermoplastic resin as necessary to produce pellets of the resin composition.

The pellet silo 12 stores the pellets produced by the granulator 11. The pellet silo 12 supplies the pellets stored therein to the extruder 13.

The extruder 13 extrudes the molten resin composition in the form of a sheet from an extruder die (not shown) to produce a base layer 101 that is a cast film layer.

The extruder 13 forms the base layer 101, which is a cast film layer, and extrudes the molten resin composition in the form of a sheet from an extruder die (not shown). The base layer 101, that is, the cast film layer extruded from the extruder 13, is transported by a transport roller (not shown) or the like, and is supplied to a longitudinal stretching device 14, which will be described later. Hereinafter, thick black arrows in the figures indicate the flow direction of the base layer 101.

The longitudinal stretching device 14 is disposed at a downstream position in the flow direction (transportation direction) of the base layer 101 extruded from the extruder 13, that is, the cast film layer.

The longitudinal stretching device 14 stretches the base layer 101 extruded from the extruder 13, that is, the cast film layer, in the flow direction of the base layer 101. Hereinafter, the flow direction (conveyance direction) of the base layer 101 may be referred to as the longitudinal direction. The vertical direction corresponds to the first direction.

The longitudinal stretching device 14 corresponds to a first stretching device that stretches the base layer 101 (cast film layer) in the longitudinal direction (first direction). Further, the longitudinal stretching device 14 realizes a first stretching step of stretching the base layer 101 (cast film layer) in the longitudinal direction (first direction).

In the longitudinal stretching device 14, for example, a plurality of (three in the example shown in FIG. 1) conveyance rollers are arranged parallel to each other in a direction perpendicular to the longitudinal stretching direction. Then, by making a difference in the peripheral speed of the conveying rollers, for example, a longitudinal tension is applied to the cast film layer between these conveying rollers, and the layer is stretched in the longitudinal direction. That is, the longitudinal stretching device 14 may perform inter-roll stretching using the difference in circumferential speed between the roll groups.

When the thermoplastic resin used is an amorphous resin, the stretching temperature during stretching is preferably in a range equal to or higher than the glass transition temperature of the thermoplastic resin. In addition, when the thermoplastic resin is a crystalline resin, the stretching temperature must be within a range that is above the glass transition point of the amorphous portion of the thermoplastic resin and below the melting point of the crystalline portion of the thermoplastic resin. The temperature is preferably 2 to 60°C lower than the melting point of the thermoplastic resin. Specifically, a stretching temperature of 100°C to 164°C is preferable for propylene homopolymer (melting point 155°C to 167°C), and a stretching temperature of 70°C to 133°C for high density polyethylene resin (melting point 121°C to 134°C). A stretching temperature of .

The stretching speed is not particularly limited, but from the viewpoint of stable stretching and forming, it is preferably within the range of 20 m/min to 350 m/min.

In addition, the stretching ratio can be determined as appropriate by considering the characteristics of the thermoplastic resin used. For example, when biaxially stretching is performed using a propylene resin, the stretching ratio is the area stretching ratio, and the lower limit is usually 1.5 times or more, preferably 4 times or more, and the upper limit is usually 60 times or less, preferably 50 times or less.

FIG. 2 is a diagram schematically showing a configuration example of the longitudinal stretching device 14 of the laminated film manufacturing system 1 as an example of an embodiment.

In the example shown in FIG. 2, four

conveyance rollers

141a, 141b, 141c, and 141d are arranged with their rotation axes perpendicular to the longitudinal direction so that their rotation axes are parallel to each other. . The four

conveyance rollers

141a, 141b, 141c, and 141d are arranged along the flow direction of the base layer 101 in the following order: conveyance roller 141a, conveyance roller 141b, conveyance roller 141c, and conveyance roller 141d. Hereinafter, if the

conveyance rollers

141a, 141b, 141c, and 141d are not particularly distinguished, they will be referred to as conveyance rollers 141.

Each of these conveyance rollers 141 is configured to be rotatable around a rotating shaft by a drive motor (not shown), and rotates in a direction along the flow of the base layer 101 while in contact with the base layer 101.

Further, in each conveyance roller 141, the rotational speed of the drive motor is controlled such that the peripheral speed of the conveyance roller 141 disposed downstream in the flow direction of the base layer 101 is faster. As a result, tension is generated in the base layer 101 between adjacent conveyance rollers 141 along the flow direction of the base layer 101, and the base layer 101 is stretched in the longitudinal direction.

Further, other conveyance rollers (not shown) are also provided on the conveyance path of the base layer 101 to convey the base layer 101 to the downstream side. These conveyance rollers correspond to a conveyance device that conveys the base layer (base material layer) 101. The base layer 101 that has been stretched in the longitudinal direction by the longitudinal stretching device 14 is conveyed to the horizontal stretching device 16, which is the next step.

The transverse stretching device 16 is arranged downstream of the longitudinal stretching device 14.

The transverse stretching device 16 stretches the base layer 101 (first stretched layer) stretched by the longitudinal stretching device 14 in a direction (lateral direction, width direction) orthogonal to the longitudinal direction. The lateral direction corresponds to the second direction.

The lateral stretching device 16 corresponds to a second stretching device that stretches the base layer 101 (first stretched layer) in the lateral direction (width direction, second direction) orthogonal to the longitudinal direction (first direction). Further, the lateral stretching device 16 stretches the base layer 101 (first stretched layer) stretched by the longitudinal stretching device 14 in the lateral direction (width direction, second direction) orthogonal to the longitudinal direction (first direction). A second stretching process is realized.

Note that in the second stretching step, as in the first stretching step, the base layer 101 is heated to a stretching temperature depending on the type of thermoplastic resin used, and stretching is performed.

FIG. 3 is a diagram schematically showing a configuration example of the lateral stretching device 16 of the laminated film manufacturing system 1 as an example of an embodiment.

The lateral stretching device 16 includes a plurality of (six in the example shown in FIG. 3) clips 161 that grip the edges of the base layer 101, which is the first stretched layer. These clips 161 are arranged in pairs at opposing positions on each of the two edges of the base layer 101 with the base layer 101 interposed therebetween. In the example shown in FIG. 3, three pairs of clips 161 are provided along the flow direction of the base layer 101.

In these plurality of clips 161, the pairs of clips 161 provided at opposite positions with the base layer 101 in between are moved in a direction away from each other while gripping the edge portions of the base layer 101, so that the base layer 101, That is, the first stretched layer is pulled and stretched in the lateral direction (width direction).

The clip 161 that grips the base layer 101 stretches the base layer 101 in the width direction while moving in the flow direction following the conveyance of the base layer 101, and releases the base layer 101 at a predetermined position. After that, each clip 161 returns to the upstream position in the transport direction of the base layer 101 and grips the base layer 101 again. In this way, in the lateral stretching device 16, the base layer 101 is stretched in the lateral direction by repeatedly gripping, stretching, and releasing the base layer 101 using the plurality of clips 161. That is, the lateral stretching device 16 performs clip stretching using a tenter oven. The base layer 101 that has been stretched in the lateral direction by the lateral stretching device 16 is conveyed to the

inkjet ejection devices

30a and 30b, which is the next step.

A plurality of (two in the example shown in FIG. 1)

inkjet ejection devices

30a and 30b are provided downstream of the lateral stretching device 16. The inkjet discharge devices 30b are arranged side by side at downstream positions of the inkjet discharge devices 30a in the flow direction of the base layer 101. The inkjet discharge device 30a may also be referred to as a first inkjet discharge device 30a. Further, the inkjet discharge device 30b may be referred to as a second inkjet discharge device 30b.

The

inkjet ejecting devices

30a and 30b each eject a coating liquid onto the surface of the base layer 101 (base material layer) that is stretched by the lateral stretching device 16 and conveyed in the longitudinal direction (flow direction), thereby forming the first layer of the base layer 101. A uniform coating layer is formed on one side (surface).

The inkjet discharge device 30a discharges the first coating liquid, and the inkjet discharge device 30b discharges the second coating liquid. By discharging the second coating liquid before the first coating liquid dries, the first coating liquid and the second coating liquid are mixed on the base layer 101. A layer of the mixed liquid (mixed liquid layer) is formed on the base layer 101 . When the components contained in the first coating liquid and the components contained in the second coating liquid are mutually reactive, the first coating liquid and the second coating liquid Both components react in the mixed liquid, and this mixed liquid is dried (cured) on the base layer 101 to realize the function as a functional material.

It is desirable that the combination of mutually reactive components contained in the first coating liquid and the second coating liquid has high reactivity. Examples include combinations of photopolymerizable compounds and photopolymerization initiators, combinations of crosslinkable compounds and crosslinking agents, combinations of resins such as urethane and coupling agents, and combinations of epoxy resins and amine curing agents. It will be done. Further, the combination of mutually reactive components contained in the first coating liquid and the second coating liquid may be other than these, and may be appropriately changed and implemented.

As described above, the inkjet discharge device 30b is arranged downstream of the inkjet discharge device 30a in the flow direction of the base layer 101. Therefore, the inkjet discharge device 30b discharges the second coating liquid onto the surface of the first coating layer formed by discharging the first coating liquid onto the base layer 101 by the inkjet discharge device 30a. As a result, the first coating liquid and the second coating liquid are mixed on the base layer 101, and a coating layer of a two-component mixed liquid is formed.

Hereinafter, when the

inkjet ejection devices

30a and 30b are not particularly distinguished, they will be referred to as an inkjet ejection device 30.

The inkjet discharge device 30 discharges a coating liquid onto the base layer 101 from a nozzle array provided in a direction (horizontal direction) orthogonal to the conveyance direction (vertical direction) of the base layer 101 (base material layer) to form the coating layer 102. Realizes a coating process that forms A nozzle row is formed by arranging a plurality of nozzles in a row.

FIG. 4 is a diagram for explaining

inkjet ejection devices

30a and 30b of the laminated film manufacturing system 1 as an example of an embodiment.

The

inkjet ejection devices

30a and 30b are arranged along the width direction at positions facing the surface of the base layer 101, respectively. The inkjet discharge device 30b is arranged in line with the inkjet discharge device 30a at a downstream position of the inkjet discharge device 30a in the flow direction of the base layer 101.

In FIG. 4, the first coating layer formed by the inkjet discharging device 30a discharging the first coating liquid onto the base layer 101 is denoted by the reference numeral 102a, and the inkjet discharging device 30b represents the first coating layer formed by discharging the first coating liquid onto the base layer 101. The second coating layer formed by discharging the second coating liquid onto the coating layer 102a is designated by the reference numeral 102b. Note that the second coating layer 102b is a mixed liquid layer of the first coating liquid and the second coating liquid, and contains components contained in the first coating liquid and the second coating liquid. It may also contain reaction products of the contained components.

Further, a reverse rotation roller (not shown) may be arranged downstream of the inkjet discharge device 30b.

The reverse rotation roller rotates in a direction opposite to the flow direction of the base layer 101 being conveyed while being in contact with the surface of the base layer 101, thereby rotating the first coating layer 102a formed on the surface of the base layer 101. The second coating layer 102b is mixed to generate a mixed liquid layer.

Hereinafter, if the

coating layers

102a and 102b are not particularly distinguished, they will be referred to as coating layers 102.

Further, the arrangement of the inkjet ejection device 30b may be arbitrarily set on the transport path of the base layer 101.

FIG. 5 is a diagram illustrating the arrangement of the

inkjet ejection devices

In FIG. 5, the symbol (A) indicates an example in which the inkjet ejection device 30a and the inkjet ejection device 30b are arranged side by side so as to be adjacent to each other.

In this way, on the transport path of the base layer 101, the inkjet ejection device 30a and the inkjet ejection device 30b are made adjacent to each other, and the position where the second coating layer 102b (mixed liquid layer) is formed on the base layer 101 is set on the base layer 101. By arranging it as upstream as possible in the conveyance path, the second coating layer 102b can be dried (cured) during the conveyance process of the base layer 101.

Further, in FIG. 5, the symbol (B) indicates an example in which the inkjet ejection device 30a and the inkjet ejection device 30b are arranged apart from each other. The inkjet ejection device 30a and the inkjet ejection device 30b are arranged apart from each other by a predetermined threshold value or more.

For example, if gas is generated by mixing the second coating liquid with the first coating layer 102a, the gas can be generated by arranging the inkjet ejection device 30b near ventilation equipment (not shown). gas can be efficiently processed. The threshold value may be set relatively based on, for example, the position of the inkjet discharge device 30a and the ventilation equipment.

In addition, the installation position of the inkjet discharge device 30b, the conveyance path distance (L) between the inkjet discharge device 30a and the inkjet discharge device 30b, and the time required for the coating layer 102a formed by the inkjet discharge device 30a to dry. (T) and the transport speed (V) of the base layer 101, the condition may be set to satisfy the condition L<V×T. Thereby, after the first coating process by the inkjet discharge device 30a, the second coating process by the inkjet discharge device 30b can be performed before the coating layer 102a (first coating layer) dries.

In the inkjet discharge device 30, a plurality of inkjet heads 310 (see FIG. 7, etc.) are arranged at a position facing the base layer 101.

Each inkjet head 310 has a plurality of inkjet nozzles (discharge ports) formed at positions facing the base layer 101 that discharge the coating liquid in the form of particles. In the inkjet head 310, a plurality of inkjet nozzles may be formed in a row.

An inkjet nozzle may simply be called a nozzle. Furthermore, a row of multiple nozzles formed in the inkjet head 310 may also be referred to as a nozzle row. One or more nozzle rows may be formed in the inkjet head 310.

FIG. 6 is a diagram illustrating a nozzle array of the inkjet head 310 of the inkjet discharge device 30 of the laminated film manufacturing system 1 as an example of the embodiment.

A plurality of nozzles (inkjet nozzles) are formed in the inkjet head 310 at positions facing the base layer 101.
In FIG. 6, the nozzles formed in the inkjet head 310 are represented by black circles. In FIG. 6, symbol (A) shows an example in which one nozzle row is formed in the inkjet head 310, and symbol (B) shows an example in which two nozzle rows are formed in the inkjet head 310.

The ejection of the coating liquid from each nozzle in the inkjet head 310 is controlled by a coating control section 400 (see FIG. 4). The coating control unit 400 controls the ejection of the coating liquid from the nozzles of each inkjet head 310 . For example, the coating control unit 400 can precisely control the amount of coating liquid to be ejected by controlling the on/off switching of ejection for each inkjet nozzle.

The function of the coating control unit 400 is realized by a processor of a computer (not shown) executing driver software.

The coating control unit 400 controls the discharge of the coating liquid from a specific nozzle in the inkjet head 310 by controlling the on/off of ejection for any nozzle among the plurality of nozzles formed in each inkjet head 310. Discharge control and suppression of discharge from the nozzle can be realized. The driver software that controls ejection of the inkjet head 310 is well known, and detailed description thereof will be omitted.

In the inkjet head 310, the nozzles that eject the coating liquid may be referred to as ejection nozzles, and the area including the ejection nozzles may be referred to as the ejection nozzle area.

Furthermore, in the inkjet head 310, a nozzle whose ejection of the coating liquid is suppressed may be referred to as an ejection suppression nozzle, and an area including the ejection suppression nozzle may be referred to as an ejection suppression nozzle area.

The nozzle row formed in the inkjet head 310 provided in the inkjet discharge device 30a corresponds to the first nozzle row. The inkjet discharge device 30a discharges a first coating liquid onto the base layer 101 from a first nozzle array arranged in the width direction of the base layer 101 at a first position facing the base layer 101 (base material layer). This corresponds to a first coating part that forms the coating layer 102a (first coating layer).

The nozzle row formed in the inkjet head 310 provided in the inkjet discharge device 30b corresponds to the second nozzle row. The inkjet ejection device 30b is arranged in the width direction of the base layer 101 at a second position downstream of the first position and facing the coating layer 102a (first coating layer). This corresponds to a second coating section that discharges a second coating liquid onto the surface of the coating layer 102a (first coating layer) from two nozzle rows.

Further, the inkjet discharge device 30a discharges the first coating liquid onto the base layer 101 from a first nozzle row arranged in the width direction of the base layer 101 at a first position facing the base layer 101 (base material layer). A first coating step is realized in which the coating layer 102a (first coating layer) is formed.

The inkjet ejection device 30b is arranged in the width direction of the base layer 101 at a second position downstream of the first position and facing the coating layer 102a (first coating layer). A second coating process is realized in which a second coating liquid is discharged onto the surface of the coating layer 102a (first coating layer) from two nozzle rows.

The plurality of inkjet heads 310 are arranged side by side in the width direction of the base layer 101 at positions where respective nozzle rows face the surface of the base layer 101.

7 to 9 are diagrams each showing an example of the arrangement of the inkjet head 310 of the inkjet discharge device 30 of the laminated film manufacturing system 1 as an example of the embodiment.

In the first example shown in FIG. 7, in the inkjet ejection device 30, a plurality of (five in the example shown in FIG. 7) inkjet heads 310- 1 to 310-5 are arranged in a line.

When the inkjet heads 310-1 to 310-5 are not particularly distinguished, they are referred to as inkjet heads 310.

A plurality of inkjet heads 310 arranged in a line may be referred to as an inkjet head row. In the example shown in FIG. 7, the inkjet head row is indicated by the reference numeral 300.

In the example shown in FIG. 7, the length of five inkjet heads 310-1 to 310-5 arranged in series is approximately equal to the length of the base layer 101 in the width direction.

Furthermore, in the inkjet heads 310-1 and 310-5 arranged at both ends of the inkjet head row 300 illustrated in FIG. It has become. In FIG. 7, the ejection suppressing nozzle area of the inkjet head 310 is indicated by the reference numeral 310b, and the ejection nozzle area is indicated by the reference numeral 310a.

The coating control unit 400 causes the inkjet heads 310-1 to 310-5 to discharge the coating liquid onto the base layer 101 from the discharge nozzle area 310a. As a result, the coating liquid is ejected in the form of particles from each nozzle in the ejection nozzle area 310a of each inkjet head 310.

A uniform coating layer 102 is formed on the surface of the base layer 101 at a position facing the discharge nozzle area 310a in the width direction of the base layer 101. In FIG. 7, a region (coating layer region) in which the coating layer 102 is formed in the base layer 101 is indicated by the reference numeral 100b.

Additionally, the coating control unit 400 inhibits the inkjet heads 310-1 and 310-5 provided at both ends of the inkjet head array 300 from ejecting the coating liquid from the ejection suppression nozzle region 310b.

As a result, at both ends (both edges) in the width direction of the base layer 101, dry edges, which are regions where the coating liquid is not applied, are formed at positions facing the ejection suppression nozzle region 310b. In FIG. 7, the dry edge is indicated by the reference numeral 100a.

Furthermore, the second example shown in FIG. 8 shows an example in which the base layer 101 is wider than the example shown in FIG.

In the example shown in FIG. 8, the length of five inkjet heads 310-1 to 310-5 arranged in series (the length of the inkjet head row 300) is the width direction of the coating layer region 100b of the base layer 101. approximately equal in length.

In the inkjet head row 300, the coating control unit 400 controls all the inkjet heads 310-1 and 310-5 arranged at both ends of the inkjet head row 300 without providing the ejection suppression nozzle area 310b. The head 310 is used as a discharge nozzle region 310a to discharge the coating liquid onto the base layer 101.

As a result, a uniform coating layer 102 is formed on the surface of the base layer 101, and a coating layer region 100b is formed.

Further, the coating liquid is not applied to the positions where the inkjet head 310 is absent at both ends (both edges) in the width direction of the base layer 101, thereby forming dry edges 100a.

A third example shown in FIG. 9 shows an example in which the width of the base layer 101 is narrower than that in the example shown in FIG.

In the example shown in FIG. 9, among the five inkjet heads 310-1 to 310-5, the length of three inkjet heads 310-2 to 310-4 arranged in series is It is larger than the length in the width direction of the layer region 100b.

Further, among the inkjet head row 300, inkjet heads 310-1 and 310-5 arranged at both ends serve as an ejection suppression nozzle area 310b. Furthermore, in the inkjet heads 310-2 and 310-4, a portion facing a predetermined range from the edge of the base layer 101 serves as an ejection suppression nozzle region 310b.

The coating control unit 400 causes the inkjet heads 310-2 to 310-4 in the inkjet head array 300 to eject the coating liquid onto the base layer 101 from the ejection nozzle area 310a.

As a result, a uniform coating layer is formed on the surface layer at a position facing the discharge nozzle region 310a in the width direction of the base layer 101, and a coating layer region 100b is formed.

Furthermore, in the inkjet head array 300, the coating control unit 400 suppresses the ejection of the coating liquid from the ejection suppression nozzle area 310b for the inkjet heads 310-1, 310-2, 310-4, and 310-5. do.

As a result, at both ends (both edges) in the width direction of the base layer 101, dry edges 100a, which are regions to which the coating liquid is not applied, are formed at positions facing the ejection suppression nozzle region 310b.

As described above, in the present laminated film manufacturing system 1, in the inkjet head array 300, the inkjet is installed at least at a position facing the widthwise edge of the coating layer region 100b, that is, the widthwise edge of the coating layer 102. A head 310 is arranged. By coating and forming both ends of the coating layer region 100b with an inkjet nozzle, the edges (boundary between the coating layer region 100b and the dry edge 100a) can be formed precisely and linearly, and the dry edge 100a can be formed with high precision.

For example, the inkjet heads 310-1 and 310-5 in the first example shown in FIG. 7, the inkjet heads 310-1 and 310-5 in the second example shown in FIG. The inkjet heads 310-2 and 310-4 in Example 3 correspond to the inkjet head 310 disposed at a position facing the widthwise edge of the coating layer region 100b (coating layer 102).

A dryer (not shown) may be provided downstream of the inkjet ejection device 30b. The dryer dries the second coating layer 102b (mixed liquid layer) formed on the surface of the base layer 101 by the

inkjet ejection devices

30a and 30b. For example, the dryer may dry the second coating layer 102b by blowing warm air onto the surface of the base layer 101 that is conveyed in the vertical direction. The dryer implements a drying process of drying the second coating layer 102b.

Downstream of the dryer, the laminated film 100 may be processed such as cutting both edges of the laminated film 100 using a cutting device (not shown) or the like. Furthermore, processing such as measuring the thickness of the laminated film 100 may be performed using a measuring device (not shown) or the like. Thereafter, the laminated film 100 is wound up by a winder (not shown) and sent to the subsequent finishing process.

(B) Operation In the laminated film manufacturing system 1 configured as described above, the raw materials stored in the

raw material silos

10a and 10b are fed into the granulator 11.

The granulator 11 adds inorganic fillers and arbitrary additives to the raw material thermoplastic resin as needed to produce pellets of the resin composition. The generated pellets are stored in a pellet silo 12.

The pellet silo 12 supplies the pellets stored therein to the extruder 13.

The extruder 13 produces a base layer 101 (cast film layer). The base layer 101 produced by the extruder 13 is fed into the longitudinal stretching device 14 .

The longitudinal stretching device 14 stretches the base layer 101 extruded from the extruder 13 in the longitudinal direction. The base layer 101 (first stretched layer) stretched in the longitudinal direction by the longitudinal stretching device 14 is then fed into the horizontal stretching device 16 .

The lateral stretching device 16 stretches the base layer 101, which has been stretched in the vertical direction by the longitudinal stretching device 14, in the lateral direction (width direction).

The inkjet discharge device 30a discharges the first coating liquid onto the surface of the base layer 101 (base material layer) to form a coating layer 102a having a uniform thickness.
Thereafter, the inkjet ejection device 30b ejects the second coating liquid onto the coating layer 102a to form a coating layer 102b having a uniform thickness before the coating layer 102a dries. The coating layer 102b is a mixed liquid layer of the first coating liquid and the second coating liquid.

The coating layer 102b formed on the surface of the base layer 101 is dried by a dryer. Thereby, the laminated film 100 is produced. Thereafter, the laminated film 100 is processed such as cutting on both edges and measuring the thickness. The laminated film 100 is wound up by a winder (not shown) and sent to a subsequent finishing process.

(C) Effect As described above, according to the laminated film manufacturing system 1 as an example of the embodiment, the

inkjet discharging devices

30a and 30b apply the coating liquid to the base layer 101 that has been stretched in the lateral direction by the lateral stretching device 16. By discharging this,

coating layers

102a and 102b with uniform thickness can be formed on the front and back surfaces of the base layer 101.

After the inkjet discharge device 30a discharges the first coating liquid onto the surface of the base layer 101 (base material layer) to form a coating layer 102a having a uniform thickness, and before the coating layer 102a dries, the inkjet The discharge device 30b discharges the second coating liquid onto the coating layer 102a to form a coating layer 102b having a uniform thickness.

Thereby, two-liquid mixing of the first coating liquid and the second coating liquid can be performed on the base layer 101, and high performance can be obtained.

Furthermore, the mixing position of the two liquids can be controlled by the arrangement of the inkjet discharge device 30b.

For example, when gas is generated by mixing two liquids, the gas generation position can be limited to a position downstream of the line by arranging the inkjet discharge device 30b at a downstream position away from the inkjet discharge device 30a.

For example, if curing takes time due to mixing of two liquids, the first inkjet ejection device 30a and the second inkjet ejection device 30b may be arranged as close to each other as possible in the upstream position on the conveyance path of the base layer 101. , sufficient time can be secured for drying (hardening) of the coating layer 102b during the transportation process of the base layer 101.

The coating control unit 400 discharges the coating liquid only from the nozzles included in the discharge nozzle region 310a provided opposite the coating layer region 100b of the base layer 101 in the inkjet head array 300 of the inkjet discharge device 30. let The coating control unit 400 suppresses the ejection of the coating liquid from the nozzles included in the ejection suppression nozzle region 310b provided opposite the dry edge 100a of the base layer 101.

Thereby, dry edges 100a can be easily formed at both ends (both edges) in the width direction of the base layer 101, and it is possible to prevent the coating liquid from turning around in the base layer 101. The coating liquid discharged from the nozzle of the inkjet head 310 has small droplets, and the coating control unit 400 can precisely control the coating amount. and the dry edge 100a) can be formed precisely and linearly, and the dry edge 100a can be formed with high precision. As a result, it is possible to prevent the coating liquid from turning around at the ends of the base layer 101.

For example, in the first example shown in FIG. 1,310-5, the ejection of the coating liquid from the ejection suppression nozzle region 310b is suppressed.

As a result, dry edges can be easily formed at both ends (both edges) in the width direction of the base layer 101 at positions facing the ejection suppression nozzle area 310b, and the coating liquid can be prevented from turning around in the base layer 101. can do.

Furthermore, in the second example shown in FIG. 8, the length of the inkjet head row 300 is made approximately equal to the length in the width direction of the coating layer region 100b of the base layer 101. Then, the coating control unit 400 uses all the inkjet heads 310 constituting the inkjet head array 300 as the ejection nozzle region 310a to eject the coating liquid onto the base layer 101.

With this, by discharging the coating liquid as minute particles from the inkjet nozzle at both ends (both edges) in the width direction of the coating layer region 100b, the edges of the coating layer region 100b can be precisely and linearly formed. It is possible to form a dry edge easily and with high precision, and it is possible to prevent the coating liquid from turning around at both ends of the base layer 101.

Further, in the third example shown in FIG. The coating liquid is ejected only from the nozzles included in the region 310a. The coating control unit 400 suppresses the ejection of the coating liquid from the nozzles included in the ejection suppression nozzle region 310b of the inkjet heads 310-2 and 310-4 provided opposite the dry edge 100a of the base layer 101. Furthermore, the coating control unit 400 prevents the coating liquid from being ejected to the inkjet heads 310-1 and 310-5 where the opposing base layer 101 does not exist.

This also allows dry edges to be easily and precisely formed at the positions facing the ejection suppression nozzle area 310b at both ends (both edges) in the width direction of the base layer 101, and the coating liquid at both ends of the base layer 101. can be prevented from turning around.

In the inkjet head row 300, inkjet heads 310 are arranged at least at each position facing the widthwise edge of the coating layer region 100b (coating layer 102). For example, the inkjet heads 310-1 and 310-5 in the first example shown in FIG. 7, the inkjet heads 310-1 and 310-5 in the second example shown in FIG. The inkjet heads 310-2 and 310-4 in Example 3 correspond to the inkjet head 310 disposed at a position facing the widthwise edge of the coating layer region 100b (coating layer 102).

Inkjet heads 310 are arranged at each position facing the edge in the width direction of the coating layer region 100b (coating layer 102), and the coating liquid is ejected into particles from each nozzle in the discharge nozzle region 310a of these inkjet heads 310. By discharging the coating liquid to the surface of the base layer 101, the coating liquid can be thinly and evenly applied to the surface of the base layer 101, and the edge of the coating layer region 100b can be formed precisely and linearly, thereby eliminating the dry edge 100a. It can be formed with high precision. As a result, it is possible to prevent the coating liquid from turning around at both ends of the base layer 101.

(D) Others The disclosed technology is not limited to the embodiment described above, and can be implemented with various modifications without departing from the spirit of the present embodiment.

For example, in the embodiment described above, the inkjet head row 300 in the inkjet ejection apparatus 30 is composed of a plurality of inkjet heads 310 as illustrated in FIGS. 7 to 9, but the invention is not limited to this. do not have.

In the inkjet head array 300, an inkjet head 310 is arranged at each position facing the edge portion in the width direction of the coating layer 102, and a spray device may be provided in place of the inkjet head 310 at other positions.

That is, in the inkjet head row 300, spray nozzles may be provided between the inkjet nozzles provided at both ends.

FIGS. 10 to 12 are diagrams each showing a modification of the inkjet ejection device 30 of the laminated film manufacturing system 1 as an example of the embodiment.

In the fourth example shown in FIG. 10, a plurality of spray devices 320 are provided in place of the inkjet heads 310-2 to 310-4 of the inkjet discharge device 30 of the first example shown in FIG. Note that in the drawings, the same reference numerals as those already described indicate the same parts, so the explanation thereof will be omitted.

The spray device 320 is a device that sprays a coating liquid, and sprays the coating liquid in a state such as a mist from a spray nozzle (not shown) using gas such as high-pressure air or mechanical motion (such as a piezo element). discharge).

The spraying of the coating liquid by the spray device 320 is performed under the control of the coating control section 400.

The coating control unit 400 causes each spray device 320 to spray the coating liquid onto the base layer 101, and causes the inkjet heads 310-1 and 310-5 to spray the coating liquid onto the base layer 101 from the discharge nozzle area 310a. Discharge is performed.

A coating layer 102 is formed on the surface of the base layer 101 at a position facing each spray device 320 in the width direction of the base layer 101.

In the example shown in FIG. 10, each spray device 320 sprays the coating liquid to an area other than the edge of the coating layer region 100b, so that the coating liquid sprayed from each spray device 320 to the base layer 101 is applied to the base layer 101. 101 does not turn around at both ends.

Further, the coating control unit 400 causes the inkjet heads 310-1 and 310-5 to discharge the coating liquid from the discharge nozzle area 310a to the base layer 101, so that each inkjet head 310-1, 310-5 The coating liquid is discharged in the form of particles from each nozzle in the discharge nozzle region 310a of 310-5, and the coating liquid is evenly applied to the surface of the base layer 101. Furthermore, the end portion of the coating layer region 100b can be formed precisely and linearly, and the dry edge 100a can be formed with high precision.

Additionally, the coating control unit 400 inhibits the inkjet heads 310-1 and 310-5 in the inkjet head array 300 from ejecting the coating liquid from the ejection suppression nozzle region 310b.

Further, in the fifth example shown in FIG. 11, a plurality of spray devices 320 are provided in place of the inkjet heads 310-2 to 310-4 of the inkjet discharge device 30 of the second example shown in FIG.

In the example shown in FIG. 11, each spray device 320 sprays the coating liquid to an area other than the edge portion of the base layer 101, so that the coating liquid sprayed from each spray device 320 to the base layer 101 is applied to both ends of the base layer 101. There is no turning back in the department.

In addition, dry edges 100a to which no coating liquid is applied are formed at both ends (both edges) of the base layer 101 in the width direction at positions where the inkjet head 310 is absent.

In the sixth example shown in FIG. 12, a plurality of spray devices 320 are provided in place of the inkjet head 310-3 of the inkjet discharge device 30 of the third example shown in FIG.

The coating control unit 400 causes each spray device 320 to spray the coating liquid onto the base layer 101, and causes the inkjet heads 310-2 and 310-4 to spray the coating liquid onto the base layer 101 from the discharge nozzle area 310a. Discharge is performed.

In the example shown in FIG. 12, each spray device 320 sprays the coating liquid to an area other than the edge portion of the base layer 101, so that the coating liquid sprayed from each spray device 320 to the base layer 101 is applied to both ends of the base layer 101. There is no turning back in the department.

Further, the coating control unit 400 causes the inkjet heads 310-2, 310-4 to discharge the coating liquid from the discharge nozzle area 310a to the base layer 101, so that each inkjet head 310-2, 310-4 The coating liquid is discharged in the form of particles from each nozzle in the discharge nozzle region 310a of 310-4, and the coating liquid is evenly applied to the surface of the base layer 101. Furthermore, the end portion of the coating layer region 100b can be formed precisely and linearly, and the dry edge 100a can be formed with high precision.

Since the spray device 320 is cheaper than the inkjet head 310, the manufacturing cost of the device can be reduced by providing the spray device 320 in place of the inkjet head 310 as described above.

Further, in the embodiment described above, an example is shown in which the coating layer 102 is formed on one side (surface) of the base layer 101, but the present invention is not limited to this. For example, a coating layer may also be formed on the back surface of the base layer 101.

FIG. 13 is a diagram schematically showing an example of the arrangement of

inkjet ejection devices

30a and 30b in a modification of the laminated film manufacturing system 1 as an example of the embodiment.

When forming the coating layer 102 on both sides of the base layer 101, as illustrated in FIG. 30b-1, and inkjet ejection devices 30a-2 and 30b-2 that form a coating layer 102 on the back surface (second surface) of the base layer 101.

These inkjet discharge devices 30a-1, 30b-1, 30a-2, and 30b-2 have the same configuration as the inkjet discharge device 30 described above. Note that the inkjet discharge device 30a-1 includes a first nozzle row, and the inkjet discharge device 30b-1 includes a second nozzle row. Furthermore, the inkjet discharge device 300a-2 includes a third nozzle row, and the inkjet discharge device 30b-2 includes a fourth nozzle row.

In the first coating step, the inkjet discharging device 30a-1 discharges the first coating liquid onto the first surface (surface) of the base layer 101 from the first nozzle row to form the coating layer 102a (first coating layer 102a). coating layer) is formed.

In the second coating process, the inkjet discharge device 30b-1 injects a first coating layer from the second nozzle row onto the surface of the coating layer 102a (first coating layer) formed on the first surface (surface) of the base layer 101. Dispense the coating liquid No. 2.

A coating layer 102b (mixed liquid layer) is formed on the first surface (surface) of the base layer 101 by the inkjet ejection device 30a-1 and the inkjet ejection device 30b-1.

In the third coating step, the inkjet ejection device 30a-2 injects the base layer 101 from a third nozzle row arranged in the width direction of the base layer 101 at a third position facing the second surface (back surface) of the base layer 101. A third coating liquid is discharged onto the second surface (back surface) to form a coating layer 102a (third coating layer).

The inkjet discharge device 30b-2 is located downstream of the position (third position) of the inkjet discharge device 30a-2 in the fourth coating step, and is opposite to the second surface (back surface) of the base layer 101. At the fourth position, a fourth coating liquid is discharged onto the coating layer 102a (third coating layer) from a fourth nozzle row arranged in the width direction of the base layer 101.

A coating layer 102b (mixed liquid layer) is formed on the second surface (back surface) of the base layer 101 by the inkjet ejection device 30a-2 and the inkjet ejection device 30b-2. Note that the compositions of the first to fourth coating liquids may be different from each other or may be the same, but they are not all the same coating liquids.

In the example shown in FIG. 13, an inkjet discharge device 30b and an inkjet discharge device 30a are arranged side by side in the vertical direction. Then, by bending and folding back the conveyance path of the base layer 101 stretched by the lateral stretching device 16 using a plurality of conveyance rollers 201, the coating layer 102 is formed on the back surface (second surface) by the inkjet discharge device 30b. A coating layer 102 is formed on the surface (first surface) of the formed base layer 101 by an inkjet discharge device 30a.

By arranging the inkjet discharging device 30b and the inkjet discharging device 30a vertically side by side in this way, it is possible to save space in the present laminated film manufacturing system 1.

Furthermore, in the inkjet ejection device 30b and the inkjet ejection device 30a, spray nozzles may be provided between the inkjet nozzles provided at both ends of the inkjet head row 300.

The inkjet head 310 and the spray device 320 are both smaller than the coating roller and have a high degree of freedom in installation, so it is possible to save space in the laminated film manufacturing system 1.

A surface layer or a back layer may be further formed on the base layer 101 on which the coating layer 102 is formed. Furthermore, the base layer 101 may be multilayered.

Further, in the embodiment described above, in the laminated film manufacturing system 1, the two inkjet ejection devices 30a (30a-1, 30a-2), 30b (30b-1, 30b-2) are used to coat one surface of the base layer 101. Although an example of forming the coating layer 102b (mixed liquid layer) has been shown, the present invention is not limited to this. A mixed liquid layer may be formed on one surface of the base layer 101 using three or more inkjet ejection devices 30, and the method can be modified as appropriate.

Furthermore, the present embodiment can be implemented and manufactured by those skilled in the art based on the above-mentioned disclosure.

(E) Additional notes Regarding the above embodiments, the following additional notes are further disclosed.

(Additional note 1)
A method for producing a laminated film in which a coating layer is formed on a base layer, the method comprising:
While conveying the base material layer,
At a first position facing the base layer, a first coating liquid is discharged onto the base layer from a first nozzle row arranged in the width direction of the base layer to form a first coating layer. a first coating step to form a
At a second position downstream of the first position and facing the first coating layer, a second nozzle array arranged in the width direction of the base layer to the first A method for producing a laminated film, comprising a second coating step of discharging a second coating liquid onto the surface of the coating layer.

(Additional note 2)
A non-coating area where the coating layer is not formed is set along both ends in the width direction of the base layer,
The length in the width direction of at least one of the first nozzle row and the second nozzle row is approximately the same as the width of the coating layer,
The method for producing a laminated film according to appendix 1, wherein in the nozzle array having a length substantially the same as the width of the coating layer, the nozzles provided at least at both ends are inkjet nozzles.

(Appendix 3)
A non-coating area where the coating layer is not formed is set along both ends in the width direction of the base layer,
The length in the width direction of at least one of the first nozzle row and the second nozzle row is longer than the width of the coating layer,
In the nozzle array that is longer than the width of the coating layer, nozzles provided at positions facing both ends of the coating layer in the width direction and at positions facing the non-coating area are inkjet nozzles,
At least one of the first coating step and the second coating step,
Production of the laminated film according to Supplementary Note 1, comprising a step of suppressing ejection of the coating liquid from the inkjet nozzle provided at a position corresponding to the non-coating area in the nozzle row. Method.

(Additional note 4)
The laminated film according to any one of Supplementary Notes 1 to 3, wherein the first nozzle row and the second nozzle row are arranged at least a threshold value apart on the conveyance path of the base layer. manufacturing method.

(Appendix 5)
The laminated layer according to any one of Supplementary Notes 1 to 4, wherein the second coating step is performed after the first coating step and before the first coating layer dries. Film manufacturing method.

(Appendix 6)
In the first coating step, the first coating liquid is discharged from the first nozzle row onto the first surface of the base layer to form the first coating layer,
In the second coating step, the second coating liquid is discharged from the second nozzle row onto the first surface of the first coating layer,
moreover,
At a third position facing the second surface of the base layer, a third coating is applied to the second surface of the base layer from a third nozzle row arranged in the width direction of the base layer. a third coating step of discharging a liquid to form a third coating layer;
At a fourth position that is downstream of the third position and faces the second surface of the base layer, from a fourth nozzle row arranged in the width direction of the base layer The method for producing a laminated film according to any one of Supplementary Notes 1 to 5, comprising a fourth coating step of discharging a fourth coating liquid onto the third coating layer.

(Appendix 7)
A manufacturing device for manufacturing a laminated film in which a coating layer is formed on a base layer,
a conveyance device that conveys the base material layer;
At a first position facing the base layer, a first coating liquid is discharged onto the base layer from a first nozzle row arranged in the width direction of the base layer to form a first coating layer. a first coating part forming a
At a second position downstream of the first position and facing the first coating layer, a second nozzle array arranged in the width direction of the base layer to the first A laminated film manufacturing apparatus comprising: a second coating section that discharges a second coating liquid onto the surface of the coating layer.

(Appendix 8)
A non-coating area where the coating layer is not formed is set along both ends in the width direction of the base layer,
The length in the width direction of at least one of the first nozzle row and the second nozzle row is approximately the same as the width of the coating layer,
The laminated film manufacturing apparatus according to appendix 7, wherein in the nozzle array having a length substantially the same as the width of the coating layer, the nozzles provided at least at both ends are inkjet nozzles.

(Appendix 9)
A non-coating area where the coating layer is not formed is set along both ends in the width direction of the base layer,
The length in the width direction of at least one of the first nozzle row and the second nozzle row is longer than the width of the coating layer,
In the nozzle array that is longer than the width of the coating layer, nozzles provided at positions facing both ends of the coating layer in the width direction and at positions facing the non-coating area are inkjet nozzles,
At least one of the first coated part and the second coated part,
The laminated film manufacturing apparatus according to appendix 7, characterized in that, in the nozzle row, ejection of the coating liquid from the inkjet nozzle provided at a position corresponding to the non-coating area is suppressed.

(Appendix 10)
The laminated film according to any one of Supplementary Notes 7 to 9, wherein the first nozzle row and the second nozzle row are arranged at least a threshold value apart on the conveyance path of the base material layer. manufacturing equipment.

(Appendix 11)
After the first coating part forms the first coating layer and before the first coating layer dries, the second coating part applies the first coating layer to the surface of the first coating layer. The laminated film manufacturing apparatus according to any one of Supplementary Notes 7 to 10, characterized in that the coating liquid of 2 is discharged.

(Appendix 12)
in the first coating section, discharging the first coating liquid from the first nozzle row onto the first surface of the base layer to form the first coating layer;
in the second coating section, discharging the second coating liquid from the second nozzle row onto the first surface of the first coating layer;
moreover,
At a third position facing the second surface of the base layer, a third coating is applied to the second surface of the base layer from a third nozzle row arranged in the width direction of the base layer. a third coating section that discharges a liquid to form a third coating layer;
At a fourth position that is downstream of the third position and faces the second surface of the base layer, from a fourth nozzle row arranged in the width direction of the base layer The apparatus for producing a laminated film according to any one of Supplementary Notes 7 to 11, further comprising a fourth coating section that discharges a fourth coating liquid onto the surface of the third coating layer.

1 Laminated

film manufacturing system

10a, 10b Raw material silo 11 Granulator 12 Pellet silo 13 Extruder 14

Longitudinal stretching device

141a, 141b, 141c, 141d, 141 Conveyance roller 16 Lateral stretching device 18

Dryer

30a, 30a-1, 30a-2 , 30b, 30b-1, 30b-2, 30 inkjet discharge device 100 laminated film 100a dry edge 100b coating layer region 101 base layer 102a, 102 coating layer (first coating layer)
102b, 102 coating layer (second coating layer)
161 Clip 201 Conveyance roller 300 Inkjet head row 310-1 to 310-5, 310 Inkjet head 310a Discharge nozzle area 310b Discharge suppression nozzle area 320 Spray device 400 Coating control section

Claims

A method for producing a laminated film in which a coating layer is formed on a base layer, the method comprising:
While conveying the base material layer,
At a first position facing the base layer, a first coating liquid is discharged onto the base layer from a first nozzle row arranged in the width direction of the base layer to form a first coating layer. a first coating step to form a
At a second position downstream of the first position and facing the first coating layer, a second nozzle array arranged in the width direction of the base layer to the first A method for producing a laminated film, comprising a second coating step of discharging a second coating liquid onto the surface of the coating layer.
A non-coating area where the coating layer is not formed is set along both ends in the width direction of the base layer,
The length in the width direction of at least one of the first nozzle row and the second nozzle row is approximately the same as the width of the coating layer,
2. The method for producing a laminated film according to claim 1, wherein the nozzles provided at least at both ends of the nozzle array having a length substantially the same as the width of the coating layer are inkjet nozzles.
A non-coating area where the coating layer is not formed is set along both ends in the width direction of the base layer,
The length in the width direction of at least one of the first nozzle row and the second nozzle row is longer than the width of the coating layer,
In the nozzle array that is longer than the width of the coating layer, nozzles provided at positions facing both ends of the coating layer in the width direction and at positions facing the non-coating area are inkjet nozzles,
At least one of the first coating step and the second coating step,
The laminated film according to claim 1, further comprising a step of suppressing ejection of the coating liquid from the inkjet nozzle provided at a position corresponding to the non-coating area in the nozzle row. Production method.
2. The method for manufacturing a laminated film according to claim 1, wherein the first nozzle row and the second nozzle row are arranged at a distance of more than a threshold value on the transport path of the base material layer.
5. The method according to claim 1, wherein the second coating step is performed after the first coating step and before the first coating layer dries. Method for manufacturing laminated film.
In the first coating step, the first coating liquid is discharged from the first nozzle row onto the first surface of the base layer to form the first coating layer,
In the second coating step, the second coating liquid is discharged from the second nozzle row onto the first surface of the first coating layer,
moreover,
At a third position facing the second surface of the base layer, a third coating is applied to the second surface of the base layer from a third nozzle row arranged in the width direction of the base layer. a third coating step of discharging a liquid to form a third coating layer;
At a fourth position that is downstream of the third position and faces the second surface of the base layer, from a fourth nozzle row arranged in the width direction of the base layer 2. The method for producing a laminated film according to claim 1, further comprising a fourth coating step of discharging a fourth coating liquid onto the third coating layer.
A manufacturing device for manufacturing a laminated film in which a coating layer is formed on a base layer,
a conveyance device that conveys the base material layer;
At a first position facing the base layer, a first coating liquid is discharged onto the base layer from a first nozzle row arranged in the width direction of the base layer to form a first coating layer. a first coating part forming a
At a second position downstream of the first position and facing the first coating layer, a second nozzle array arranged in the width direction of the base layer to the first A laminated film manufacturing apparatus comprising: a second coating section that discharges a second coating liquid onto the surface of the coating layer.