CN110280449A - The manufacturing method of apparatus for coating and film - Google Patents

The manufacturing method of apparatus for coating and film Download PDF

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Publication number
CN110280449A
CN110280449A CN201910203847.2A CN201910203847A CN110280449A CN 110280449 A CN110280449 A CN 110280449A CN 201910203847 A CN201910203847 A CN 201910203847A CN 110280449 A CN110280449 A CN 110280449A
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CN
China
Prior art keywords
coating
liquid layer
coating liquid
coated
fluid
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Granted
Application number
CN201910203847.2A
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Chinese (zh)
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CN110280449B (en
Inventor
道平创
三宅雅士
那须徹雄
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Nitto Denko Corp
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Nitto Denko Corp
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Publication of CN110280449A publication Critical patent/CN110280449A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1015—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target
    • B05C11/1023—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target responsive to velocity of target, e.g. to web advancement rate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C13/00—Means for manipulating or holding work, e.g. for separate articles
    • B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/007—After-treatment

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)

Abstract

The present invention provides the manufacturing method of a kind of apparatus for coating and film.The apparatus for coating includes coating part, the coating part is coated on liquid layer to the more than one 1st relatively moved together with the coating object being first coated on coating object and is coated with next 2nd coating liquid layer, the apparatus for coating is configured to that the 1st coating liquid layer and the 2nd coating liquid layer is made to be solidified to form film, the apparatus for coating is constituted are as follows: the length of the downstream side lip of the movement speed, that is, nondimensional velocity and the coating part for the movement speed of the coating object at the interface between the 2nd coating liquid layer of the 1st coating liquid layer meets specific mathematical expression.

Description

The manufacturing method of apparatus for coating and film
Technical field
The present invention relates to the manufacturing methods of a kind of apparatus for coating and film.
Background technique
In the past, as a kind of apparatus for coating, for example, having used the coating pair such as substrate from multiple coating parts to relative movement As it is upper successively spray each coating fluid come continuously formed in a manner of stacking it is multiple coating liquid layers die coating machines.
The die coating machine has multiple die heads along the moving direction of coating object, which is used as spraying coating fluid simultaneously The coating part being coated on coating object.The die coating machine is constituted are as follows: using the coating part of most upstream side in relative movement It is coated on object after applied coating solution layer, had successively previously been coated with until next coating part to the coating part of most downstream side Is coated with next coating liquid layer before coating liquid layer solidification, later, makes the solidification of each coating liquid layer, and formed film (each film layer Laminated body) (referring to patent document 1).
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2000-185254 bulletin
Summary of the invention
Problems to be solved by the invention
But in apparatus for coating as described above, when being coated with next coating liquid layer on the coating liquid layer being previously coated with, The coating liquid layer being previously coated with may be caused to lose shape because of the ejection of next coating fluid.Moreover, with the coating being previously coated with Liquid layer loses shape, and next coating liquid layer may also can lose shape.It like this, if it happens can not be in the coating being previously coated with It is suitably coated with unfavorable condition as next coating liquid layer on liquid layer, then is unable to get the film of desired quality.
Therefore, it is desirable to suitably be coated with next coating liquid layer on the coating liquid layer being previously coated with.
On the other hand, in order to suitably be coated with, need to make manufacturing condition condition appropriate, but from the angle of operating efficiency For, preferably the manufacturing condition is biggish range.
In view of the foregoing, the issue of the present invention is to provide one kind to carry out under large range of manufacturing condition The coating of the repressed coating of losing shape of these coating liquid layers when being coated with next coating liquid layer on the coating liquid layer being previously coated with The manufacturing method of device and film.
The solution to the problem
Apparatus for coating of the invention includes coating part, and the coating part is more than one to being sprayed by elder generation on coating object 1st coating fluid is coated and formed, it is uncured and relatively moved with the movement of the coating object more than one The 1st coating liquid layer on spray next 2nd coating fluid, come be coated with the 2nd coating liquid layer,
The apparatus for coating is configured to that the 1st coating liquid layer and the 2nd coating liquid layer is made to be solidified to form film, In,
The coating part has upstream side lip and downstream side lip, and the upstream side lip and downstream side lip are configured as It is separated from each other on the moving direction of the coating object and forms slit, the coating part is configured to from the slit to institute It states and sprays the 2nd coating fluid on the 1st coating liquid layer,
The apparatus for coating is constituted are as follows: the movement speed of the coating object is being set as uw(m/s), by the 1st coating The movement speed at the interface between the 2nd coating liquid layer of liquid layer is set as uc(m/s), by ucWith uwThe ratio between be set as down State nondimensional velocity (-) represented by mathematical expression (1) and by the length on the moving direction of the downstream side lip When being set as X (mm), the nondimensional velocity being set as Y, the X and the Y meet following mathematical expressions (2).
[number 1]
μpre: the smallest viscosity (Pas) in each viscosity of one the 1st above coating fluid
μc: the viscosity (Pas) of the 2nd coating fluid
hG: the distance between the interface and the downstream side lip (m)
hpre: the overall thickness (m) of one the 1st above coating liquid layer
ρpre: the maximum density (kg/m in each density of one the 1st above coating fluid3)
G: acceleration of gravity (m/s2)
[number 2]
Y≥0.0179×2+0.0638×+0.2···(2)
Also, in the apparatus for coating of above structure, it is also possible to
The X is 0.1 or more and 4 or less.
The manufacturing method of film of the invention is the method using apparatus for coating manufacture film, wherein
The manufacturing method of the film comprises the following steps:
To by first to coating object on spray more than one 1st coating fluid be coated it is being formed, uncured and Next 2nd coating is sprayed on the more than one 1st coating liquid layer relatively moved with the movement of the coating object Liquid, to be coated with the 2nd coating liquid layer；And
The 1st coating liquid layer and the 2nd coating liquid layer solidification is set to obtain film.
Detailed description of the invention
Fig. 1 is the outline side view for indicating the apparatus for coating of one embodiment of the present invention.
Fig. 2 is the 1st coating liquid layer and the 2nd coating fluid for schematically showing the apparatus for coating coating using present embodiment The outline side view of an example of layer.
Fig. 3 is the 1st coating liquid layer and the 2nd coating fluid for schematically showing the apparatus for coating coating using present embodiment The outline side view of an example of layer.
Fig. 4 is the 1st coating liquid layer and the 2nd coating fluid for schematically showing the apparatus for coating coating using present embodiment The outline side view of an example of layer.
Fig. 5 is the movement speed by the periphery of the 2nd coating part of the apparatus for coating in Fig. 1 together with the 1st coating liquid layer The outline side view schematically shown.
Fig. 6 is the outline side view shown in by the region S amplification in Fig. 5.
Fig. 7 is the outline side view for schematically showing the power for the 1st coating liquid layer being applied in Fig. 5.
Fig. 8 will be configured as to the periphery for the 2nd coating part for spraying the 2nd coating fluid below vertical direction together with acting on The outline side view that the gravity of 1st coating liquid layer is schematically shown together.
Fig. 9 is to apply on the periphery of the 2nd coating part on multiple 1st coating liquid layers when the 2nd coating liquid layer of coating together with the 1st The outline side view that the movement speed of cloth liquid layer is schematically shown together.
Figure 10 be the entirety of multiple 1 coating liquid layers in Fig. 9 is schematically shown as a coating liquid layer it is general Slightly side view.
Figure 11 is the outline side view for schematically showing the state that the 1st coating liquid layer and the 2nd coating liquid layer are lost shape Figure.
Figure 12 be the length (X) for indicating the downstream side lip of the 2nd coating part in test example 1, nondimensional velocity (Y) and The chart of the relationship between coating state under each X value and Y value.
Figure 13 is will to obtain in the chart being added in Figure 12 according to the approximate expression and approximate line of the chart calculating in Figure 12 The chart arrived.
Figure 14 is the chart that extraction approximate expression and approximate line are illustrated from the chart of Figure 13.
Figure 15 be indicate the 1st coating liquid layer in test example 2 the 2nd interface and the distance between downstream side lip ( Gap), the length of the downstream side lip and the relationship being applied between the drop pressure (Japanese: ビ ー De pressure) of the 1st coating liquid layer Chart.
Description of symbols
1, apparatus for coating；5, the 1st coating part；7a, downstream side lip；8, slit；15, the 2nd coating part；17a, downstream lateral lip Portion；18, slit；27, solidified portion；31, it is coated with object；33, the 1st coating fluid；35, the 1st coating liquid layer；37, the 1st film layer；43, 2nd coating fluid；45, the 2nd coating liquid layer；47, the 2nd film layer；50, film.
Specific embodiment
Firstly, being explained with reference to the apparatus for coating of present embodiment of the invention.
As shown in Fig. 1, Fig. 5 and Fig. 6, the apparatus for coating 1 of present embodiment includes coating part 15, and the coating part 15 is to passing through More than one 1st coating fluid 33 is first sprayed on coating object 31 to be coated and formed, uncured and with the painting The movement of cloth object 31 and relatively move it is more than one 1st coating liquid layer 35 on spray next 2nd coating fluid 43, come It is coated with the 2nd coating liquid layer 45,
The apparatus for coating 1 is configured to that the 1st coating liquid layer 35 and the 2nd coating liquid layer 45 is made to be solidified to form film 50, wherein
The coating part 15 has upstream side lip 16a and downstream side lip 17a, upstream side lip 16a and downstream side Lip 17a is configured as being separated from each other on the moving direction M of the coating object 31 and forming slit 18, the coating part 15 are configured to spray the 2nd coating fluid 43 on the 1st coating liquid layer 35 from the slit 18,
The apparatus for coating 1 is constituted are as follows: the movement speed of the coating object 31 is being set as uw(m/s), the described 1st is applied The movement speed of the interface 35b between the 2nd coating liquid layer 45 of cloth liquid layer 35 is set as uc(m/s), by ucWith uwIt Than being set as nondimensional velocity (-) represented by following mathematical expressions (1) and by the movement side of the downstream side lip 17a When upward length is set as X (mm), the nondimensional velocity is set as Y, the X and the Y meet following mathematical expressions (2).
[number 3]
μpre: the smallest viscosity (Pas) in each viscosity of one the 1st above coating fluid 33
μc: the viscosity (Pas) of the 2nd coating fluid 43
hG: the distance between the 2nd interface 35b and the downstream side lip 17a (m)
hpre: the overall thickness (m) of one the 1st above coating liquid layer 35
ρpre: the maximum density (kg/m in each density of one the 1st above coating fluid 333)
G: acceleration of gravity (m/s2)
[number 4]
Y≥0.0179×2+0.0638×+0.2···(2)
In addition, Fig. 1 instantiates the 2nd coating of coating on one the 1st coating liquid layer 35 being formerly coated on coating object 31 The form of liquid layer 45, but the quantity for the 1st coating liquid layer 35 being first coated with is not particularly limited as described later.
The apparatus for coating 1 of present embodiment further includes coating part 5, which is located at the moving direction M of coating object 31 On coating part 15 upstream side and have upstream side lip 6a and downstream side lip 7a, upstream side lip 6a and downstream lateral lip Portion 7a is configured to be separated from each other on the moving direction M of the coating object 31 and form slit 8, which is configured to The 1st coating fluid 33 is sprayed on the coating object 31 from the slit 8 prior to 15 ground of coating part.
In addition, coating part 5 is not limited to be configured to carry out slit mould like this in apparatus for coating of the invention Head coating.For example, coating part 5 is also configured to be able to carry out intaglio plate coating.
Hereinafter, regarding the coating part 5 of the 1st coating liquid layer 35 of first coating as the 1st coating part 5, it will be coated with the 2nd coating fluid later The coating part 15 of layer 45 is used as the 2nd coating part 15.
Apparatus for coating 1 further includes solidified portion 27, and the solidified portion 27 is for making respectively by the 1st coating part 5 and the 2nd coating part 15 1st coating liquid layer 35 and the 2nd of coating is coated with liquid layer 45 and is solidified to form each film layer 37,47.
Apparatus for coating 1 further includes supporting part 25, which is coated with object 31 using surface bearing, and in the coating It is relatively moved on the length direction of object 31 relative to the 1st coating part 5 and the 2nd coating part 15.
Coating object 31 is not particularly limited, and can be enumerated such as band-like sheet element.
For the sheet element, such as resin film can be enumerated.Also, for resin film, for example eastern beautiful public affairs can be enumerated Take charge of the Lumirror (registered trademark) etc. of system.
The painting that supporting part 25 is alongst moved from a side bearing opposite with the 1st coating part 5 and the 2nd coating part 15 Cloth object 31.1st coating part 5 and the 2nd coating part 15 successively support supported portion 25 and apply relative to the 1st coating part 5 and the 2nd The coating object 31 that cloth portion 15 relatively moves is coated with.
For the supporting part 25, roller etc. can be enumerated.
In the present embodiment, supporting part 25 makes to be coated with 31 phase of object in the position opposite with the slit 8 of the 1st coating part 5 It is mobile for the slit 8 from a side (left in Fig. 1) to another side (right in Fig. 1).
Also, supporting part 25 makes to be coated with object 31 together with the 1st coating in the position opposite with the slit 18 of the 2nd coating part 15 Relatively (lower section in Fig. 1) is mobile upwards (top in Fig. 1) from below together for liquid layer 35.
Solidified portion 27 is configured to that the 1st coating coating liquid layer 45 of liquid layer 35 and the 2nd is made to be solidified to form each film layer 37,47. By solidifying using the solidified portion 27, and form the laminated body i.e. film 50 of film layer 37 and film layer 47.As long as solidified portion 27 The 1st coating liquid layer 35 and the 2nd can be made to be coated with liquid layer 45 to solidify, be not particularly limited.The solidified portion 27 can be according to the 1st The type etc. of coating fluid 33 and the 2nd coating fluid 43 is suitably set.
In the present embodiment, as the 1st coating part 5 and the 2nd coating part 15, using the die head with slit 8,18. The apparatus for coating 1 including die head is referred to as die coating machine like this.
1st coating part 5 sprays the 1st previous coating fluid 33 from slit 8 before the 2nd coating liquid layer 45 of coating, opposite The 1st coating liquid layer 35 is successively coated on mobile coating object 31.
1st coating part 5 is configured to slit 8 upward, to the coating object 31 moved in left-right direction relative to slit 8 Spray the 1st coating fluid 33.From the incorporating section (not shown) of the 1st coating fluid 33 via piping (not shown) and pump (not shown) to the 1 coating part 5 supplies the 1st coating fluid 33.
Specifically, the die head block 6 of the 1st coating part 5 including upstream side and relatively configured with the die head block 6 of upstream side The die head block 7 in downstream side.1st coating part 5 is formed and being 7 pairing of die head block by making the die head block 6 of upstream side with downstream side 's.By make like this two die head blocks 6,7 close pair, thus be formed between them for store by pump it is (not shown) supply Lai The 1st coating fluid 33 manifold 9 and the slit 8 that towards top edge is configured from the manifold 9.Also, the mould as upstream side Between the downstream side lip 7a of the top edge of the upstream side lip 6a and die head block 7 as downstream side of the top edge of head block 6 Gap becomes the ejiction opening of slit 8.
Upstream side lip 6a and downstream side lip 7a is configured as being located in the plane vertical with the radial direction of supporting part 25.It is narrow Slot 8 is configured to radial parallel with supporting part 25.
2nd coating part 15 sprays next 2nd coating fluid 43 from slit 18 after the coating of the 1st coating liquid layer 35, The 2nd coating liquid layer 45 is successively coated on the 1st coating liquid layer 35 on the coating object 31 of relative movement.
2nd coating part 15 is configured to slit 18 towards side, to the 1st coating moved along the vertical direction relative to slit 18 The 2nd coating fluid 43 is sprayed on liquid layer 35.It via piping (not shown) and is pumped (not from the incorporating section (not shown) of the 2nd coating fluid 43 Illustrate) the 2nd coating fluid 43 is supplied to the 2nd coating part 15.
In addition, the 1st coating part 5 and the 2nd coating part 15 be also possible to include decompression chamber slit die head.
Specifically, the 2nd coating part 15 includes the die head block 16 of upstream side and relatively matches with the die head block 16 of upstream side The die head block 17 in the downstream side set.2nd coating part 15 is by keeping the die head block 16 of upstream side and the die head block 17 in downstream side right Close and formed.By making two die head blocks 16,17 pairings like this, to be formed between them for storing by pumping (not Diagram) manifold 19 of the 2nd coating fluid 43 that comes of supply and the slit 18 that towards top edge is configured from the manifold 19.Also, Under the upstream side lip 16a of the top edge of die head block 16 as upstream side and the top edge as the die head block 17 in downstream side Swimming the gap between lateral lip portion 17a becomes the ejiction opening of slit 18.
Upstream side lip 16a and downstream side lip 17a is configured as being located in the plane vertical with the radial direction of supporting part 25. Slit 18 is configured to radial parallel with supporting part 25.
The length of downstream side lip 17a is smaller, is more capable of increasing and does not walk in the 1st coating coating liquid layer 45 of liquid layer 35 and the 2nd The range in the above-mentioned gap of the 2nd coating liquid layer 45 of coating in the case where sample.In view of the viewpoint, preferably downstream side lip 17a's Length is 0.1mm or more and 4mm or less.
In the present embodiment, it is also possible to for example as shown in Figure 2, hang down in the moving direction M with coating object 31 On straight direction (left and right directions in width direction, Fig. 2), the 1st coating part 5 and the 2nd coating part 15 are configured to the company of being respectively coated Continuous one the 1st coating liquid layer 35 and one the 2nd coating liquid layer 45.
It is also possible to for example as shown in Figure 3, on above-mentioned width direction (left and right directions in Fig. 3), the 1st coating Portion 5 is configured to coating and is separated from each other the separated multiple 1st coating liquid layers 35 in compartment of terrain, and the 2nd coating part 15 is configured to apply each 1st Multiple 2nd coating liquid layers 45 corresponding with each 1st coating liquid layer 35 are respectively coated on cloth liquid layer 35.
It is also possible to for example, as shown in figure 4, on above-mentioned width direction (left and right directions in Fig. 4), the 1st coating Portion 5 is configured to be coated with continuous one the 1st coating liquid layer 35, and the 2nd coating part 15 is configured to be coated on the 1st coating liquid layer 35 It is separated from each other the separated multiple 2nd coating liquid layers 45 in compartment of terrain.
The apparatus for coating 1 of present embodiment is constituted are as follows: the movement speed for being coated with object 31 is being set as uw(m/s), by the 1st The movement speed of the interface 35b between the 2nd coating liquid layer 45 of coating liquid layer 35 is set as uc(m/s), by ucWith uwThe ratio between be set as Nondimensional velocity (-) represented by above-mentioned mathematical expression (1) and the length of the downstream side lip 17a of the 2nd coating part 15 is set For X (mm), above-mentioned nondimensional velocity is set as Y when, X and Y meet above-mentioned mathematical expression (2).
For above-mentioned mathematical expression (1), mathematical expression (2), described below.
Firstly, as shown in Fig. 1, Fig. 5 and Fig. 6, for being coated with a coating liquid layer 35 on coating object 31 and at this One coating liquid layer 35 on be coated with it is next coating liquid layer 45 when the 1st coating liquid layer 35 and the 2nd be coated with liquid layer 45 lose shape by The export of the mechanism and mathematical expression (1) of inhibition is illustrated.
In Fig. 1, the 2nd coating fluid is coated on the 1st coating liquid layer 35 between the 1st coating part 5 and the 2nd coating part 15 Before layer 45, whole follow of the 1st coating liquid layer 35 is coated with the movement of 31 ground of object, therefore the movement speed of the 1st coating liquid layer 35 exists It is all identical as the coating movement speed of object 31 on whole thickness direction.That is, the thickness direction of either previous coating liquid layer On which part, movement speed all with coating the movement speed of object 31 it is identical.
In this case, as shown in figure 5, even if being coated with the 2nd coating liquid layer 45, the 1st coating on the 1st coating liquid layer 35 Interface (hereinafter, sometimes referred to as the 1st interface) 35a between coating object 31 of liquid layer 35 is also coated with liquid layer 45 with coating the 2nd The movement of coating object 31 is similarly followed before.Therefore, the movement speed and coating of the 1st interface 35a of the 1st coating liquid layer 35 The movement speed of object 31 is identical.
In contrast, the interface between the 2nd coating liquid layer 45 of the 1st coating liquid layer 35 is (hereinafter, sometimes referred to as the 2nd boundary Face.) 35b is difficult to follow the movement of coating object 31 when being coated with the 2nd coating liquid layer 45, for the movement compared to coating object 31 Postponed.Therefore, correspondingly with the delay, the movement speed of the 2nd interface 35b of the 1st coating liquid layer 35 is compared to coating the 2nd Become smaller for before coating liquid layer 45, also, on the thickness direction of the 1st coating liquid layer 35, from the 1st interface 35a, court It is gone to the 2nd interface 35b, the movement speed of each section is with regard to smaller.It, can be as if the movement speed of the 2nd interface 35b becomes too small The 1st coating liquid layer 35 loses shape as shown in Figure 11.It is accompanied by this, the 2nd coating liquid layer 45 also loses shape.In addition, the 1st applies The movement speed of 2nd interface 35b of cloth liquid layer 35 is identical as the 2nd coating movement speed of liquid layer 45.
Therefore, by making the movement speed of the 1st the 2nd interface 35b for being coated with liquid layer 35 close to the mobile speed of coating object 31 Degree is able to suppress the 1st coating coating liquid layer 45 of liquid layer 35 and the 2nd and loses shape.
As shown in fig. 7, the master that the reduction of the movement speed as the 2nd interface 35b to the 1st coating liquid layer 35 affects Reason is wanted, can enumerate and the barometric gradient of the 1st coating liquid layer 35 is applied to by the drop pressure of the 2nd coating fluid 43, is applied to the 1st The gravity for being coated with liquid layer 35, the shearing force applied from the 2nd coating liquid layer 45 to the 2nd interface 35b of the 1st coating liquid layer 35.
Therefore, their theories based on physics and mathematics are applied to hydromechanical theoretical formula (Na Weier-Si Tuo Gram this equation).In use, assuming not flow on the direction (width direction) vertical with the coating moving direction M of object 31. Pass through the application, the movement speed u of the 2nd interface 35b of the 1st coating liquid layer 35cThe movement speed of coating object 31 can be passed through uw, use the 1st coating liquid layer 35 in barometric gradientPressure gradient term, gravity item and the following numbers of shearing force Xiang Erru Formula (3) indicates like that.As shown in following mathematical expressions (3), the movement speed of the 2nd interface 35b of the 1st coating liquid layer 35 is from painting The movement speed u of cloth object 31wIn subtract value obtained from pressure gradient term, gravity item and shearing force item.
As shown in following mathematical expressions (3), above-mentioned pressure gradient term includes the thickness h of the 1st coating liquid layer 35pre, the 1st coating The viscosity, mu of liquid 33preAnd the 1st coating liquid layer 35 in barometric gradientSuch element.
The barometric gradientIt is to be applied by the drop pressure of the 2nd coating fluid 43 sprayed from the slit 18 of the 2nd coating part 15 Gradient (that is, pressure distribution) on the pressure that the 1st is coated with liquid layer 35, coating object 31 moving direction M.
In addition, being applied to the 1st in the position (that is, before spraying the 2nd coating fluid 43) than the 2nd coating part 15 on the upstream side The pressure for being coated with liquid layer 35 is 0, also, the pressure is equal with atmospheric pressure.In addition, x is (preceding to be coated with the moving direction of object 31 Into direction) it is positive coordinate.
Above-mentioned gravity item includes the density p of the 1st coating liquid layerpre, gravity acceleration g, the 1st coating liquid layer 35 thickness hpre And the 1st coating fluid 33 viscosity, mupre, coating object 31 moving direction and gravity direction angulation θ as Element.
Above-mentioned shearing force item includes the thickness h of the 1st coating liquid layer 35pre, the 1st coating fluid 33 viscosity, mupre, the 2nd coating fluid 43 viscosity, muc, the 1st coating liquid layer 35 the 2nd interface 35b movement speed ucAnd the 1st coating liquid layer 35 the 2nd interface 35b with The distance between downstream side lip 17a (gap) hGSuch element.
[number 5]
μpre: the viscosity (Pas) of the 1st coating fluid 33
μc: the viscosity (Pas) of the 2nd coating fluid 43
hG: the distance between the 2nd interface 35b and the downstream side lip 17a (m)
hpre: the thickness (m) of the 1st coating liquid layer
ρpre: the density (kg/m of the 1st coating liquid layer3)
G: acceleration of gravity (m/s2)
θ: the direction angulation (°) that the moving direction M and gravity of the coating object 31 apply
Moreover, if obtained mathematical expression (3) to be deformed into the mobile speed for indicating the 2nd interface 35b of the 1st coating liquid layer 35 Spend ucWith the movement speed u of coating object 31wThe ratio between (uc/uw), then it can obtain following mathematical expressions (4).
[number 6]
Here, the barometric gradient in the 1st coating liquid layer 35By the length of the downstream side lip 17a of the 2nd coating part 15 It influences.
Therefore, for barometric gradientFor, can in addition change into is that the length of downstream side lip 17a is examined Consider, replaces, make barometric gradient 0 (zero) in above-mentioned mathematical expression (4) It is following thereby, it is possible to obtain Mathematical expression (5).
[number 7]
As described above, the movement speed u of the 2nd interface 35b of the 1st coating liquid layer 35cClose to the movement of coating object 31 Speed uwPreferably, therefore uc/uwPreferably close to 1.
Here, cos θ is-1 or more and 1 the following value (θ≤1-1≤cos).
As shown in figure 5, when cos θ=- 1 is θ=180 °, at this point ,-ρpreGcos θ maximum (- ρpreGcos θ=ρpreg)。 Therefore, if the value in addition to cos θ is constant, the u of above-mentioned mathematical expression (5)c/uwIt is minimum.
On the other hand, when θ=1 cos is θ=0 °, at this point ,-ρpreGcos θ minimum (- ρpreGcos θ=- ρpreg).Cause This, is if the value in addition to cos θ is constant, the u of the above-mentioned formula (5) of above-mentioned mathematical expression (5)c/uwMaximum (not shown).
Also, in the case where 0 ° 180 ° of < θ <, uc/uwThe value between value when value when for θ=0 ° and θ=180 °.
For example, as shown in figure 8, the 2nd coating part 15 by its slit 18 downward in a manner of configure, to relative to slit The 2nd coating is sprayed on the 1st mobile coating liquid layer 35 of 18 from a side (right sides in Fig. 8) to another side (left side in figure) In the case where liquid 43, θ=90 °, θ=0 cos.Therefore, in this case, uc/uwValue when value when for θ=180 ° and θ=0 ° Between value.It, can be without apparent gravity item (gravity item=0) in mathematical expression (3) also, in cos θ=0.That is, being applied to the 1st The gravity of coating liquid layer 35 is not applied on the direction for making the 1st coating liquid layer 35 lose shape.
Therefore, become the case where θ=180 ° for making above-mentioned uc/uwThe worst condition close to for 1.
Thus, in above-mentioned formula (5) when θ=180 °, as described below, export mathematical expression (1).Also, in following mathematics In formula (1), by the ratio between above-mentioned movement speed (uc/uw) it is referred to as nondimensional velocity.
[number 8]
In above-mentioned mathematical expression (1), coating the 2nd is applied on one the 1st coating liquid layer 35 being coated on coating object 31 In the case where cloth liquid layer 45, μpre、μc、hG、hpre、ρpreAnd g is following such.
μpre: the viscosity (Pas) of the 1st coating fluid 33
μc: the viscosity (Pas) of the 2nd coating fluid 43
hG: the distance between the 2nd interface 35b and the downstream side lip 17a (m)
hpre: the thickness (m) of the 1st coating liquid layer 35
ρpre: the density (kg/m of the 1st coating fluid 333)
G: acceleration of gravity (m/s2)
Then, as shown in figure 9, for multiple 1st coating liquid layers 35 are coated on coating object 31, the multiple 1st The 1st coating liquid layer 35 and the 2nd is coated with losing shape for liquid layer 45 and is pressed down when being coated with next 2nd coating liquid layer 45 on coating liquid layer 35 The export of the mechanism and mathematical expression (1) of system is illustrated.
As shown in figure 9, for example, apparatus for coating 1 includes the upstream side with the moving direction M from coating object 31 under Trip side go and be the 1st~N-1 N-1 (integer that N is 3 or more) coating parts, wherein first with the 1st~the The 1st N-1 coating part (the 1st coating part) 5 the 1st~N-1 of coating on coating object 31 a coating liquid layer 35, utilizes Next 2nd coating liquid layer 45 (n-th coating liquid layer) of the coating of n-th coating part (the 2nd coating part) 15.
In this case, in the 2nd coating liquid layer 45 of coating on the 1st coating liquid layer 35 of outermost (N-1), from 1st coating liquid layer 35 of most inner side (the 1st) rises, until outermost 1st coating liquid layer 35, each 1st coating liquid layer 35 Movement speed gradually becomes smaller.Also, the movement speed of each 1st coating liquid layer 35 plays the 2nd coating liquid layer from coating 31 side of object It is also to gradually become smaller until 45 sides.Moreover, the mobile speed at the interface between coating object 31 of the 1st the 1st coating liquid layer 35 Degree is identical as the coating movement speed of object 31, is uw, on the other hand, the 1st coating liquid layer 35 of N-1 with the 2nd coating fluid The movement speed at the interface between layer 45 is identical as the 2nd coating movement speed of liquid layer 45, is uc。
Like this, for it is multiple 1 coating liquid layers 35 generally speaking, from the 1st the 1st be coated with liquid layer 35 with coating pair As the interface between 31, the interface between the 2nd coating liquid layer 45 for being more directed towards N-1 the 1st coating liquid layer 35 is gone, Its movement speed is with regard to smaller.
Also, if the movement speed at the interface between the 2nd coating liquid layer 45 of N-1 the 1st coating liquid layer 35 becomes Must be too small, then multiple 1 coating liquid layers 35 can lose shape, and be accompanied by this, and the 2nd coating liquid layer 45 can also lose shape.
Therefore, by making movement speed of the movement speed of N-1 the 1st coating liquid layer 35 close to coating object 31, energy Enough inhibit multiple 1st coating liquid layers 35 and the 2nd to be coated with liquid layer to lose shape.
In this way, inhibiting conduct if the entirety of multiple 1st coating liquid layers 35 is interpreted as one the 1st coating liquid layer 35 One of entirety coating liquid layer 35 and the 2nd be coated with mechanism that liquid layer 45 loses shape with it is above-mentioned on a coating liquid layer 35 The case where being coated with the 2nd coating liquid layer 45 (referring to Fig. 5) is identical.
In addition, being affected as the reduction to the movement speed gone from the 1st interface 35a towards the 2nd interface 35b main Reason, as described above (referring to Fig. 7), since barometric gradient, gravity and shearing force are applied to multiple 1st coating liquid layers 35 are whole Add.
Thus, it, also can be by will be multiple in the case where the 2nd coating liquid layer 45 of coating on multiple 1 coating liquid layers 35 The entirety of 1st coating liquid layer 35 is interpreted as one the 1st coating liquid layer 35 and applies above-mentioned mathematical expression (1).
That is, being not only formerly coated on one the 1st coating liquid layer 35 on coating object 31 for above-mentioned mathematical expression (1) Under the case where being coated with next 2nd coating liquid layer 45 (two layers of coating), it is formerly coated on the two or more being coated on object 31 The 1st coating liquid layer 35 under the case where being coated with next 2nd coating liquid layer 45 (coating 3 layers or more), can also pass through by The more than two 1st coating liquid layers 35 being first coated with are interpreted as one the 1st coating liquid layer 35 as a whole and apply with above-mentioned two layers Cloth similarly applied mathematics formula (1).
In this case, in mathematical expression (1), the 1st coating liquid layer 35 of outermost (N-1) with the 2nd coating fluid Interface and its movement speed between layer 45 are the 2nd interface 35b and its movement speed of multiple 1st coating liquid layers 35.
The overall thickness with a thickness of the 1st~N-1 the 1st coating liquid layer 35 of 1st coating liquid layer 35.
On the other hand, in mathematical expression (1), μpreIt is smaller, uc/uwIt is smaller, therefore become than less favorable condition.Therefore, Using the smallest viscosity in each viscosity of multiple 1st coating fluids 33 as typical value.
Also, in mathematical expression (1), ρpreIt is bigger, uc/uwIt is smaller, therefore become than less favorable condition.Therefore, it uses Maximum viscosity in each viscosity of multiple 1st coating fluids 33 is as typical value.
Therefore, in mathematical expression (1), coating the 2nd is applied on the multiple 1st coating liquid layers 35 being coated on coating object 31 In the case where cloth liquid layer 45, μpre、μc、hG、hpre、ρpreAnd g is following such.
μpre: the smallest viscosity (Pas) in each viscosity of the multiple 1st coating fluid 33
μc: the viscosity (Pas) of the 2nd coating fluid
hG: the distance between the 2nd interface 35b and the downstream side lip 17a (m)
hpre: the overall thickness (m) of the multiple 1st coating liquid layer 35
ρpre: the maximum density (kg/m in each density of the multiple 1st coating fluid 333)
G: acceleration of gravity (m/s2)
Later, by above situation as it is following it is shown be one with above-mentioned 1st coating liquid layer 35 situation unify Come.
μpre: the smallest viscosity (Pas) in each viscosity of one the 1st above coating fluid 33
μc: the viscosity (Pas) of the 2nd coating fluid
hG: the distance between the 2nd interface 35b and the downstream side lip 17a (m)
hpre: the overall thickness (m) of one the 1st above coating liquid layer 35
ρpre: the maximum density (kg/m in each density of one the 1st above coating fluid 333)
G: acceleration of gravity (m/s2)
In this way, above-mentioned mathematical expression (1) is exported.
In the mathematical expression (1), nondimensional velocity is to indicate that painting is followed in the movement of the 2nd interface 35b of the 1st coating liquid layer 35 The index of the degree of the movement of cloth object 31.That is, the movement speed of the 2nd interface 35b of the 1st coating liquid layer 35 is closer to coating pair As 31 movement speed, nondimensional velocity is closer to 1, and when consistent, nondimensional velocity becomes 1.Also, nondimensional velocity more connects Liquid layer 45 is easier is coated in the case where not losing shape for nearly 1, the 1st coating liquid layer 35 and the 2nd coating.
On the contrary, the movement speed of the 2nd interface 35b of the 1st coating liquid layer 35 is further away from (being more less than) coating object 31 Movement speed, nondimensional velocity become smaller further away from 1 towards 0, and the 1st coating liquid layer 35 and the 2nd is coated with liquid layer 45 and is more easy to happen Lose shape.
In addition, passing through the element for making above-mentioned pressure gradient term, gravity item and shearing force item be included in mathematical expression (1) In remove barometric gradientEach element (each manufacturing condition) variation in addition, can be such that nondimensional velocity changes.Therefore, nothing The amplitude for the numberical range that dimensioned velocity can use with remove barometric gradientThe numerical value model that each element in addition can use The amplitude the enclosed i.e. amplitude of manufacturing condition is suitable.
Then, the export of above-mentioned mathematical expression (2) is illustrated.
As described above, the barometric gradient in the 1st coating liquid layer 35 when being coated with the 2nd coating liquid layer 45By the 2nd The effect length of the downstream side lip 17a of coating part 15.
Therefore, the length of downstream side lip 17a walks belt transect to the 1st coating liquid layer 35 when being coated with the 2nd coating liquid layer 45 To influence.
On the other hand, above-mentioned nondimensional velocity also gives the 1st coating liquid layer 35 when the 2nd coating liquid layer 45 of coating to walk belt transect To influence.
Like this, according to the degree of the numerical value of nondimensional velocity, the length of the downstream side lip for the 2nd coating part that can be coated with The numberical range of degree becomes larger or becomes smaller.On the contrary, according to the degree of the length of downstream side lip 17a, the dimensionless that can be coated with The numberical range of speed becomes larger or becomes smaller.
Wherein, shown in embodiment as be described hereinafter, in downstream side, the length X and nondimensional velocity Y of lip 17a meets following numbers In the case where range shown in formula (2), the 1st coating liquid layer 35 and the 2nd can not be made to be coated with liquid layer 45 be coated with the 2nd painting with losing shape Cloth liquid layer 45, also, the numberical range of X and the numberical range both of which of Y can expand.In addition, in the later-described embodiments, The length of downstream side lip 17a is made various changes and nondimensional velocity is made various changes, and in the 1st coating fluid The 2nd coating liquid layer 45 of coating on layer 35, to illustrate to make in each condition the 1st coating liquid layer 35 to be coated with the 2nd painting with keeping the shape Can cloth liquid layer 45 obtain desired 1st coating liquid layer 35 and the 2nd and be coated with liquid layer 45.
In addition, using each nondimensional velocity as y-axis, the length with downstream lateral lip portion 17a is x shown in embodiment as be described hereinafter Axis, by each nondimensional velocity and downstream side lip 17a corresponding with each nondimensional velocity together with one whether being coated in good condition Label diagrammatizes, and in obtained chart, for each downstream side lip 17a, is selected respectively near coating state Undesirable label and label in good condition is coated with, by, come the approximate mark group being selected, and being made using quadratic expression For the mathematical expression (2) of approximate expression.
[number 9]
Y≥0.0179×2+0.0638×+0.2···(2)
In this way, mathematical expression (2) are exported.
According to above-mentioned mathematical expression (1), (2), when being coated with the 2nd coating liquid layer 45, can utilize and the 1st coating that is first coated with Relationship between liquid layer 35 determines the application conditions of apparatus for coating 1 in a manner of meeting above-mentioned mathematical expression (2).
The thickness that each 1st coating liquid layer 35 and the 2nd is coated with liquid layer 45 can be in a manner of meeting above-mentioned mathematical expression (1), (2) Suitably set.The thickness for example can be by applying according to the viscosity of each 1st coating fluid 33 and the 2nd coating fluid 43 to from the 1st Cloth portion 5 and the 2nd coating part 15 spray the spray volume of the 1st coating fluid 33 and the 2nd coating fluid 43 and the movement speed of coating object 31 At least one of could be adjusted to adjust.
For example, being difficult to if the thickness of the 1st coating coating liquid layer 45 of liquid layer 35 and the 2nd is too small in desired whole region Coating can be sagging because of self weight if the thickness that the 1st coating liquid layer 35 and the 2nd is coated with liquid layer 45 is excessive, therefore exists and be difficult to apply The tendency of cloth.
Thus, it is contemplated that the viewpoint, for example, the 1st coating liquid layer 35 thickness be preferably 0.01 μm or more and 1000 μm with Under, more preferably 0.1 μm or more and 500 μm or less.
For example, the 2nd coating liquid layer 45 thickness be preferably 0.01 μm or more and 1000 μm hereinafter, more preferably 0.1 μm with It is upper and 500 μm or less.
Each 1st coating fluid 33 contains cure component, can be solid on the coating object 31 after being coated on coating object 31 Change.
2nd coating fluid 43 contains cure component, can be coated with liquid layer 35 the 1st after being coated on the 1st coating liquid layer 35 Upper solidification.
The type of 1st coating fluid 33 and the 2nd coating fluid 43 can be appropriate in a manner of meeting above-mentioned mathematical expression (1), (2) Ground setting.
As the 1st coating fluid 33 and the 2nd coating fluid 43, such as polymer solution can be enumerated, as above-mentioned solidification The material of ingredient can enumerate thermoset materials, ultra-violet solidified material, electric wire curable material etc..
As the 1st coating fluid 33, can enumerate bonding agent as such as silane coupling agent, ultraviolet hardening bonding agent, Adhesive, liquid crystal etc..
It can have an advantage in that the 2nd coating liquid layer 45 and the bonding force being coated between object 31 improve using them.
The viscosity of 1st coating fluid 33 is preferably 0.0005Pas or more and 30Pas hereinafter, more preferably 0.001Pa S or more and 20Pas or less.The viscosity is the value obtained by the measurement method measurement recorded in aftermentioned embodiment.
In the case where the viscosity of the 1st coating fluid 33 is 0.0005Pas or more, having an advantage in that can pass through Known coating method is easily coated with.
The 1st coating fluid 33 viscosity be 30Pas situation below under, having an advantage in that can be by pumping this The known liquid supply part of sample is easily to 5 feed flow of coating part.
The density p of 1st coating fluid 33prePreferably 600kg/m3~1400kg/m3, more preferably 700kg/m3~ 1300kg/m3.The density is the value obtained by the measurement method measurement recorded in aftermentioned embodiment.
The thickness of 1st coating liquid layer 35 (is each thickness for being coated with liquid layer 35 in the case where the 1st coating liquid layer 35 is multiple Degree) it is preferably 0.1 μm~1000 μm, more preferably 1 μm~500 μm.The thickness is the survey by recording in aftermentioned embodiment The value that amount method measurement obtains.
As the 2nd coating fluid 43, can enumerate bonding agent as such as ultraviolet hardening bonding agent, adhesive, Liquid crystal etc..
The viscosity of 2nd coating fluid 43 is preferably 0.0005Pas or more and 30Pas hereinafter, more preferably 0.001Pa S or more and 20Pas or less.The viscosity is the value obtained by the measurement method measurement recorded in aftermentioned embodiment.
In the case where the viscosity of the 2nd coating fluid 43 is 0.0005Pas or more, having an advantage in that can pass through Known coating method is easily coated with.
The 2nd coating fluid 43 viscosity be 30Pas situation below under, having an advantage in that can be by pumping this The known liquid supply part of sample is easily to 15 feed flow of coating part.
The density p of 2nd coating fluid 43prePreferably 600kg/m3~1400kg/m3, more preferably 700kg/m3~ 1300kg/m3.The density is the value obtained by the measurement method measurement recorded in aftermentioned embodiment.
The thickness of 2nd coating liquid layer 45 is preferably 0.1 μm~1000 μm, and more preferably 1 μm~500 μm.The thickness is logical Cross the value that the measurement method measurement recorded in aftermentioned embodiment obtains.
1st coating fluid 33 and the 2nd coating fluid 43 are also possible to different types either identical type.
In the case where the 1st coating fluid 33 and the 2nd coating fluid 43 are different types, it is preferred that with the 2nd coating fluid 43 It compares, the viscosity of the 1st coating fluid 33 is higher.
The spray volume for spraying the 1st coating fluid 33 from the slit 8 of the 1st coating part 5 can be to meet the side of mathematical expression (1), (2) Formula is suitably set.
The spray volume for example can be 0.01L/min~50L/min.
The spray volume for spraying the 2nd coating fluid 43 from the slit 18 of the 2nd coating part 15 can be to meet mathematical expression (1), (2) Mode is suitably set.
The spray volume for example can be 0.01L/min~50L/min.
Coating object 31 thickness be not particularly limited, but for example preferably its with a thickness of 20 μm~100 μm.
The form for the component that coating object 31 is flexible strip is shown in FIG. 1, but in addition to this, coating Object 31 can also use form, the form with inflexibility of veneer shape.
The movement speed of the coating object 31 can for example adjust by adjusting the revolving speed of supporting part 25.The movement speed Preferably 1m/min~300m/min, more preferably 5m/min~50m/min.
When the movement speed for being coated with object 31 is 1m/min or more, coating object can be moved more steadily.For example, Supporting part 25 can be more stably rotated, therefore coating object 31 can be moved more steadily.
When the movement speed for being coated with object 31 is 300m/min or less, it is able to suppress the rolling when coating movement of object 31 Dynamic, sinuous movement.
Like this, in the case where the apparatus for coating of present embodiment 1, it is preferred that the 1st coating fluid 33 has The viscosity of 0.0005Pas~30Pas, the 2nd coating fluid 43 have the viscosity of 0.0005Pas~30Pas, are coated with object 31 movement speed is 1m/min~300m/min.
Then, the manufacturing method of the film of present embodiment 50 is illustrated.
The manufacturing method of the film 50 of present embodiment uses above-mentioned apparatus for coating 1.
The manufacturing method comprises the following steps:
It is coated from the 2nd coated portion 15 to by first spraying more than one 1st coating fluid 33 on coating object 31 And formed, it is uncured and with it is described coating object 31 movement and relatively move it is more than one 1st coating liquid layer 35 It is upper to spray next 2nd coating fluid 43, to be coated with the 2nd coating liquid layer 45 (next painting process)；And
The 1st coating liquid layer 35 and the 2nd coating solidification of liquid layer 45 is set to obtain film 50.
It also, in the present embodiment, further include (being applied here for one the 1st first with more than one 1st coating part 5 Cloth portion 5) process of more than one 1st coating liquid layer (being coated with liquid layer here for one) 35 is coated on coating object 31 (first Preceding painting process).
Specifically, in the manufacturing method of the film 50 of present embodiment, firstly, to meet above-mentioned mathematical expression (2) Mode sets the length X and nondimensional velocity Y of downstream side lip 17a.
In the setting of nondimensional velocity Y, by adjusting the type and concentration, painting of the 1st coating fluid 33 and the 2nd coating fluid 43 The movement speed of cloth object 31, the spray volume sprayed from the 1st coating part 5, to set the viscosity, mu of the 1st coating fluid 33pre, the 2nd apply The viscosity, mu of cloth liquid 43c, the 1st coating liquid layer 35 overall thickness hpre, the 1st coating liquid layer each density ppre.Also, pass through setting The configuration of 2nd coating part 15, to set the distance between the 2nd interface 35b and downstream side lip the 17a h of the 1st coating liquid layer 35G。 Wherein, gravity acceleration g is constant.
The length X of the downstream side lip 17a of 2nd coating part 15 can be set when making the die head block 17 in downstream side.
Later, under conditions of setting, the 1st coating is sprayed on coating object 31 from more than one 1st coating part 5 Liquid 33 is coated with liquid layer 35 to be coated with the more than one 1st, sprays the 2nd coating on the 1st coating liquid layer 35 from the 2nd coating part 15 Liquid 43 is coated with liquid layer 45 to be coated with the 2nd.Then, make to be coated on each 1st coating liquid layer on coating object 31 using solidified portion 27 35 and the 2nd coating liquid layer 45 solidifies, and obtains more than one 1st film layer 37 and the 2nd film layer 47 (as their stacking The film 50 of body).
In addition, wanting in the coating liquid layer of coating 3 or more on being coated with object 31, it can be in the 2nd~n-th It is respectively coated in the coating of liquid layer, is coated with and connects down on the coating liquid layer being formerly coated in a manner of meeting above-mentioned mathematical expression (1), (2) The coating liquid layer come.It, can be with specifically, when wanting be coated with multiple (N-1) the 1st on being coated with object 31 and be coated with liquid layer 35 The coating of the 2nd~N-1 each 1st coating liquid layers 35 is successively carried out in a manner of meeting above-mentioned mathematical expression (1), (2), Then, wanting in the 2nd coating liquid layer 45 of coating on the 1st coating liquid layer 35 of N-1, with meet above-mentioned mathematical expression (1), (2) mode carries out the coating of the 2nd coating liquid layer 45.
Using the apparatus for coating 1 of above-mentioned present embodiment and the manufacturing method of film 50, with the downstream of the 2nd coating part 15 Relationship between nondimensional velocity Y represented by the length X and mathematical expression (1) of lateral lip portion 17a becomes the model for meeting mathematical expression (2) The mode enclosed be coated with the 2nd coating liquid layer 45, thus be coated with the 2nd coating liquid layer 45 when, make be coated with object 31 movement speed with The difference of the movement speed of 2nd interface 35b of the 1st coating liquid layer 35 becomes smaller, therefore the movement of the 2nd interface 35b can be followed sufficiently It is coated with the movement of object 31.Therefore, the 1st coating liquid layer 35 and the 2nd can be made to be coated with liquid layer 45 be coated with the 2nd coating fluid with keeps the shape Layer 45.
Further, it is possible to expand the range for the application conditions that can be coated with not losing shape like this.
Thus, when being coated with next 2nd coating liquid layer 45 on the 1st coating liquid layer 35 being previously coated with, inhibit this The coating that a little coating liquid layers 35,45 lose shape can carry out under large range of application conditions.
The apparatus for coating 1 of present embodiment and the manufacturing method of film 50 can be applied to for example be used to form semiconductor core The process materials of piece.
In this case, the 1st film layer 37 can be regard as chip attachment film, regard the 2nd film layer 47 as cutting belt.It will The laminated body (film) 50 that 1st film layer 37 and the 2nd film layer 47 are laminated is located at semiconductor die with the 1st film layer 37 The mode of circle side is laminated in semiconductor chip, will partly be led in a manner of it can obtain the semiconductor chip of desired size, quantity The cutting of body chip, removes the 2nd film layer 47 later, the 1st exposed film layer 37 is laminated in another semiconductor chip.
The apparatus for coating of present embodiment and the manufacturing method of film are configured to above-mentioned such, therefore have below excellent Point.
Present inventor has performed conscientiously studying, opinion below has been obtained.
That is, being previously coated with when spraying next coating liquid layer on the uncured coating liquid layer being previously coated with Follow the movement of coating object, therefore its movement speed and painting in the interface (the 1st interface) between coating object of coating liquid layer The movement speed of cloth object is identical.In contrast, the boundary between next coating liquid layer for the coating liquid layer being previously coated with Face (the 2nd interface) becomes difficult to follow the movement for being coated with object, movement speed due to the contact of next coating liquid layer It is reduced for movement speed compared to coating object.Also, if the movement speed phase at the 2nd interface of the coating liquid layer being initially formed It is excessively reduced for movement speed than being coated with object, then the 2nd interface can become that the movement of coating object can not be followed.Knot Fruit finds that the coating liquid layer being first coated with loses shape.
Also, next coating not only is coated on a coating liquid layer being formerly coated on coating object like this Under the case where liquid layer (coating two layers), it is coated on more than two coating liquid layers for being formerly coated on coating object next It, also can be by the way that the more than two coating liquid layers being first coated with integrally be managed under the case where being coated with liquid layer (3 layers of coating or more) Solution finds that the coating liquid layer being first coated with loses shape using mechanism same as above-mentioned two layers coating for a coating liquid layer.
Therefore, the more than one 1st coating liquid layer that the present inventor is conceived to the movement speed of coating object and is first coated with The 2nd coating liquid layer between interface (the 2nd interface) movement speed, in order to by their relationship be based on physics and mathematics Theory be applied to hydromechanical theoretical formula (Navier-Stokes equation), conscientiously studied.
As a result, it has been found that being coated with next 2nd coating liquid layer on the more than one 1st coating liquid layer being previously coated with When, the 1st coating liquid layer the 2nd interface movement speed can by be coated with object movement speed, because the 2nd coating liquid layer Pressure gradient term caused by the barometric gradient generated in the 1st coating liquid layer, the gravity institute for being applied to the 1st coating liquid layer Shear stress item caused by the movement speed at the 2nd interface of caused gravity item, the 1st coating liquid layer, with the side of mathematical expression Formula shows.
If deformed to the mathematical expression, the movement speed at the 2nd interface of above-mentioned 1st coating liquid layer can be expressed as With the mathematical expression of the ratio between the movement speed of coating object.
Here, the present inventor further progress is conscientiously studied, the pressure ladder generated in above-mentioned 1st coating liquid layer is found Degree is influenced by the length (length on the moving direction of coating object) of the downstream side lip for the coating part for spraying the 2nd coating fluid.
Therefore, for above-mentioned barometric gradient, can in addition change into is that the length of above-mentioned downstream side lip accounts for, It replaces, notationally stating makes barometric gradient 0 (zero) in the formula of the ratio between movement speed, to complete mathematical expression.Also, In the mathematical expression, the ratio between above-mentioned movement speed is referred to as nondimensional velocity.
In the mathematical expression, nondimensional velocity is to indicate that the shifting of coating object is followed at the 2nd interface of above-mentioned 1st coating liquid layer The index of dynamic degree.
Also, in the mathematical expression, the amplitude for the numberical range that nondimensional velocity can use in addition to barometric gradient The amplitude of numberical range that can use of each element (each manufacturing condition) it is suitable, therefore, with the manufacturing condition that can be coated with Amplitude is suitable.
On the other hand, for the length of the downstream side lip of above-mentioned coating part as described above the considerations of, the present inventor couple The length makes various changes and makes various changes to above-mentioned nondimensional velocity, and applies on above-mentioned 1st coating liquid layer Cloth the 2nd is coated with liquid layer, and can conscientiously have studied it is expected in each condition in the case where the 1st coating liquid layer does not lose shape The 1st coating liquid layer and the 2nd coating liquid layer.
As a result, it has been found that above-mentioned downstream side lip as desired 1st coating liquid layer and the 2nd coating liquid layer can be obtained Length and the range of nondimensional velocity can be indicated using specific relational expression, moreover, in a manner of meeting the relational expression Each manufacturing condition is set, the manufacturing condition of coating can be made to broaden, so as to complete present embodiment.
That is, the apparatus for coating 1 of present embodiment includes coating part 15, the coating part 15 is first on coating object 31 to passing through Spray more than one 1st coating fluid 33 be coated and formed, it is uncured and with it is described coating object 31 movement and Next 2nd coating fluid 43 is sprayed on the more than one 1st coating liquid layer 35 of relative movement, to be coated with the 2nd coating liquid layer 45,
The apparatus for coating 1 is configured to that the 1st coating liquid layer 35 and the 2nd coating liquid layer 45 is made to be solidified to form film 50, wherein
The coating part 15 has upstream side lip 16a and downstream side lip 17a, upstream side lip 16a and downstream side Lip 17a is configured as being separated from each other on the moving direction M of the coating object 31 and forming slit 18, the coating part 15 are configured to spray the 2nd coating fluid 43 on the 1st coating liquid layer 35 from the slit 18,
The apparatus for coating 1 is constituted are as follows: the movement speed of the coating object 31 is being set as uw(m/s), the described 1st is applied The movement speed of the interface 35b between the 2nd coating liquid layer 45 of cloth liquid layer 35 is set as uc(m/s), by ucWith uwIt Than being set as nondimensional velocity (-) represented by following mathematical expressions (1) and by the movement side of the downstream side lip 17a When upward length is set as X (mm), the nondimensional velocity is set as Y, the X and the Y meet following mathematical expressions (2).
[number 10]
μpre: the smallest viscosity (Pas) in each viscosity of one the 1st above coating fluid 33
μc: the viscosity (Pas) of the 2nd coating fluid 43
hG: the distance between the interface 35b and the downstream side lip 17a (m)
hpre: the overall thickness (m) of one the 1st above coating liquid layer 35
ρpre: the maximum density (kg/m in each density of one the 1st above coating fluid 333)
G: acceleration of gravity (m/s2)
[number 11]
Y≥0.0179×2+0.0638×+0.2···(2)
It is represented with the length X of the downstream side lip 17a of above-mentioned coating part 15 and above-mentioned mathematical expression (1) using the structure Nondimensional velocity Y between relationship become meet above-mentioned mathematical expression (2) range mode be coated with the 2nd coating liquid layer 45, from And be coated with the 2nd coating liquid layer 45 when coating object 31 movement speed and the 1st coating liquid layer 35 with the 2nd coating liquid layer 45 it Between the difference of movement speed of interface 35b become smaller, therefore the movement of interface 35b can sufficiently follow the shifting of coating object 31 It is dynamic.Therefore, the 1st coating liquid layer 35 and the 2nd can be made to be coated with liquid layer 45 be coated with the 2nd coating liquid layer 45 with keeps the shape.
Further, it is possible to expand the range for the manufacturing condition that can be coated with not losing shape like this.
Thus, it is possible to carry out being coated on the 1st coating liquid layer 35 being previously coated under large range of manufacturing condition The repressed coating of losing shape of these coating liquid layers when next 2nd coating liquid layer 45.
In addition, being also possible to the X is 0.1 or more and 4 or less in the apparatus for coating 1 of above structure.
Using the structure, it so that the 1st coating liquid layer 35 and the 2nd is coated with liquid layer 45 and be coated with the 2nd with keeping the shape It is coated with liquid layer 45.
The manufacturing method of film of the invention is the manufacturing method using the apparatus for coating 1 manufacture film, wherein
The manufacturing method of the film comprises the following steps:
To by first sprayed on coating object 31 more than one 1st coating fluid 33 be coated it is being formed, not solid It is sprayed in change and the more than one 1st coating liquid layer 35 relatively moved with the movement of the coating object 31 next 2nd coating fluid 43, to be coated with the 2nd coating liquid layer 45；And
The 1st coating liquid layer 35 and the 2nd coating solidification of liquid layer 45 is set to obtain film 50.
Using the program, the 2nd coating liquid layer 45 can be coated on the 1st coating liquid layer 35 using above-mentioned apparatus for coating 1, because This can carry out being coated on the 1st coating liquid layer 35 being previously coated under large range of manufacturing condition as described above The repressed coating of losing shape of these coating liquid layers when next 2nd coating liquid layer 45.
As described above, using present embodiment, being capable of providing one kind can carry out under large range of manufacturing condition The repressed coating of losing shape of these coating liquid layers when being coated with next coating liquid layer on the coating liquid layer being previously coated with Apparatus for coating and film manufacturing method.
The apparatus for coating of present embodiment and the manufacturing method of film are as described above, but the present invention is not limited to above-mentioned Embodiment, can present invention contemplates that in the range of be suitably designed, change.
[embodiment]
Then, test example is enumerated, the present invention is described in more detail, but the present invention is not limited to this.
Test example 1
(using material)
It is coated with object: PET (polyethylene terephthalate) film (trade name: DIAFOIL, Mitsubishi Chemical Ind's system)
1st coating fluid: acrylic polymer (trade name: Paracron, Gen Shang industrial group system)
Density and viscosity: as recorded in table 1
2nd coating fluid: acrylic polymer (trade name: ART CURE, Gen Shang industrial group system)
Density and viscosity: as recorded in table 1
Wherein, density and viscosity are measured using following measurement methods.
(measurement method of density)
1st coating fluid of constant weight and the 2nd coating fluid are respectively put into graduated cylinder, measure each volume, to measure the 1st respectively The density of coating fluid and the 2nd coating fluid.
(measurement method of viscosity)
Utilize the rheometer (model including jig (cone-plate that cone diameter is 25mm~50mm and cone angle is 0.5 °~2 °) The manufacture of RS1, HAAKE company), it is surveyed respectively under the conditions of 21 DEG C~25 DEG C of temperature and under conditions of shear velocity is 100 (1/s) Measure the viscosity of each 1st coating fluid and the 2nd coating fluid.
(coating of the 1st coating liquid layer and the 2nd coating liquid layer)
Using the apparatus for coating as illustrating in Fig. 1, under the conditions of recorded in table 1, the painting of the 1st coating liquid layer is carried out The coating state of the 1st coating liquid layer and the 2nd coating liquid layer is evaluated in the coating of cloth and the 2nd coating liquid layer.
The downstream at the 2nd interface and the 2nd coating part of the thickness of the 1st coating liquid layer and the 2nd coating liquid layer, the 1st coating liquid layer The distance between lateral lip portion is measured using following methods.
Coating state is evaluated using following methods.Also, the export of mathematical expression (2) carries out as described below.
As a result it indicates in table 1, Figure 12~Figure 14.In addition, in Figure 12, with the length of the downstream side lip of the 2nd coating part Degree X is x-axis, and using nondimensional velocity Y as y-axis, coating state when by each length X and nondimensional velocity Y is indicated in the graph.Figure 13 indicate that the expression that will be calculated in Figure 12 is bad near coating and are coated with the range of good mark group (that is, coating is good Range be coated with it is bad between boundary) approximate line be shown in chart obtained from the chart of Figure 12 together.Figure 14 It indicates from only pulling out chart obtained from approximate line in Figure 13.
(measurement method of the thickness of the 1st film layer and the 2nd film layer)
With the width (length on the direction vertical with the coating moving direction of object of the 1st coating liquid layer.It is same below.) The mode wider than the width of the 2nd coating liquid layer is coated with the 1st coating liquid layer and the 2nd coating liquid layer and dries them, thus solidify, The 1st film layer and the 2nd film layer is consequently formed.It measures to be formed using linear meter (D-10HS, the rugged production of tail manufactured by) Only the 1st film layer thickness.On the other hand, the 1st film layer and the 2nd film layer weight are measured using above-mentioned linear meter The thickness in folded region, and the thickness of the 1st film layer is subtracted from the thickness measured, and calculate the thickness of the 2nd film layer.It is logical It crosses in this way, measuring the thickness of the 1st film layer and the 2nd film layer respectively.
(measurement method at the distance between the 2nd interface of the 1st coating liquid layer and downstream side lip (gap))
Coating the distance between object 31 and downstream side lip are measured using cone gauge, the is subtracted from the distance measured The thickness of 1 coating liquid layer, and measure above-mentioned distance (gap).In addition, the thickness of the 1st coating liquid layer is according to the 1st film layer The volumetric concentration of measured value and the 1st coating fluid calculates.
(evaluation method of coating state)
Coating state is evaluated as described below.
The coating state of 1st coating liquid layer and the 2nd coating liquid layer is evaluated.
It obtains having been coated with the 1st coating liquid layer finished and the 2nd coating liquid layer, the 1st coating fluid observed by the naked eye Layer and the 2nd coating liquid layer when, by appearance without defect and obtained it is desired 1st coating liquid layer and the 2nd coating liquid layer feelings Condition is labeled as "○", indicates very good.
It obtains having been coated with the 1st coating liquid layer finished and the 2nd coating liquid layer, the 1st coating fluid observed by the naked eye When layer and the 2nd coating liquid layer, it will be observed that striped and the feelings for having obtained substantially desired 1st coating liquid layer and the 2nd coating liquid layer Condition is labeled as " △ ", indicates substantially good.
As shown in figure 12, it because the ejection of the 2nd coating liquid layer causes the 1st coating liquid layer to lose shape, is accompanied by this, the 2nd applies Cloth liquid layer also loses shape, and will be unable to the case where obtaining desired 1st coating liquid layer and the 2nd coating liquid layer labeled as "×", table Show bad.
(deriving method of mathematical expression (2))
The result of table 1 is substituted into above-mentioned mathematical expression (1), calculates each nondimensional velocity.
Using obtained nondimensional velocity as y-axis, using the length in downstream lateral lip portion as x-axis, mark each nondimensional velocity and with The length of the corresponding downstream side lip of each nondimensional velocity and by the type of label diagram coating state as a result, and obtaining figure 12 chart.
Also, in Figure 12, for each downstream side lip, selected respectively near the expression undesirable label of coating state It (marking shown in "×") and indicates to be coated with label in good condition (marking shown in " the zero of thick line "), by utilizing quadratic expression Carry out the approximate mark group being selected, and obtains the mathematical expression (2) as approximate expression like that as shown in FIG. 13 and 14.
[table 1]
The chart as shown in described Figure 12~Figure 14 to become it is found that keep the range of the X and Y of Y approximate expression or more i.e. full The mode of the X and Y of sufficient mathematical expression (2) are coated, to be coated in good condition.
In addition, in the case where being formerly coated with multiple 1st coating liquid layers, and in such a way that X and Y meet mathematical expression (2) It is coated, so that the coating of the 1st coating liquid layer and the 2nd coating liquid layer is in good condition.
Test example 2
The length of the downstream side lip of coating part is investigated to drop by being coated with one layer of coating liquid layer on coating object Bring is pressed to influence.
(using material)
It is coated with object: PET (polyethylene terephthalate) film (trade name: DIAFOIL, Mitsubishi Chemical Ind's system)
Coating fluid: acrylic polymer (trade name: ART CURE, Gen Shang industrial group system)
Weight concentration: 50wt%
Density: 960kg/m3
Viscosity: 1.22Pas
Wherein, density and viscosity are measured using above-mentioned measurement method.
(coating of coating liquid layer)
Using the apparatus for coating as being illustrated in Fig. 1, only coating object is directly coated with by the 2nd coating part.It is specific and Speech, under conditions of following, the length for the downstream side lip of the 2nd coating part is each situation of 0.2mm, 3mm, makes coating pair The distance between downstream side lip as the 2nd coating part (gap) makes various changes between 50 μm~250 μm, is being coated with On object be coated with one layer of coating liquid layer, measurement coating when coating fluid drop pressure, and to be coated with liquid layer coating state into Evaluation is gone.
It is coated with the movement speed of object: 10m/min
The thickness of coating liquid layer: 70 μm,
The drop pressure of coating fluid is measured using following methods.Also, coating state benefit is commented with the aforedescribed process Valence.
As a result it indicates in Figure 15.
(measurement method of drop pressure)
Keep above-mentioned gap sufficiently large, so as to which coating object will not be reached from the coating fluid that the 2nd coating part sprays, such Under state, coating fluid (coating fluid drippage is coated with object without reaching) is sprayed from the 2nd coating part, measures being supplied at this time The pressure P of the coating fluid of 2nd coating part0.On the other hand, in the state of being adjusted to each gap as described above, from the 2nd coating Portion sprays coating fluid (coating fluid reaches coating object and is coated on coating object) to coating object, measures being supplied at this time To the pressure P of the coating fluid to the 2nd coating part1.Later, by from pressure P1In subtract pressure P0, and measure the liquid of coating fluid Drop pressure (P1- P0)。
As shown in figure 15, the length of the downstream side lip of the 2nd coating part is smaller, and the range in the gap that can be coated with is bigger.
Therefore, it can be seen that the length of the downstream side lip of the 2nd coating part is smaller, the range for the application conditions that can be coated with is got over Greatly.
Embodiments of the present invention and embodiment are illustrated as described above, but make each embodiment and embodiment Feature to be appropriately combined be also from the beginning to map out.Also, it is to be understood that being this disclosed embodiment and reality Applying example all is to illustrate, and is not intended to limit the present invention.The scope of the present invention is not by above embodiment and to implement to exemplify But be shown in the claims, include being had altered in the meaning and range that are equal with claims.

Claims (3)

1. a kind of apparatus for coating, which includes coating part, and the coating part is to by first spraying one on coating object The 1st above coating fluid is coated and formed, it is uncured and relatively moved with the movement of the coating object one Next 2nd coating fluid is sprayed on a the 1st above coating liquid layer, to be coated with the 2nd coating liquid layer,
The apparatus for coating is configured to that the 1st coating liquid layer and the 2nd coating liquid layer is made to be solidified to form film, wherein
The coating part has upstream side lip and downstream side lip, and the upstream side lip and downstream side lip are configured as in institute It states and is separated from each other on the moving direction of coating object and forms slit, the coating part is configured to from the slit to described the The 2nd coating fluid is sprayed on 1 coating liquid layer,
The apparatus for coating is constituted are as follows: the movement speed of the coating object is being set as uw(m/s), by the 1st coating liquid layer The movement speed at the interface between the 2nd coating liquid layer is set as uc(m/s), by ucWith uwThe ratio between be set as following mathematics Nondimensional velocity (-) represented by formula (1) and the length on the moving direction of the downstream side lip is set as X (mm), when the nondimensional velocity being set as Y, the X and the Y meet following mathematical expressions (2),
[number 1]
μpre: the smallest viscosity (Pas) in each viscosity of one the 1st above coating fluid
μc: the viscosity (Pas) of the 2nd coating fluid
hG: the distance between the interface and the downstream side lip (m)
hpre: the overall thickness (m) of one the 1st above coating liquid layer
ρpre: the maximum density (kg/m in each density of one the 1st above coating fluid3)
G: acceleration of gravity (m/s2)
[number 2]
Y≥0.0179X2+0.0638X+0.2 ···(2)。
2. apparatus for coating according to claim 1, wherein
The X is 0.1 or more and 4 or less.
3. a kind of manufacturing method of film, the manufacturing method of the film is manufactured using apparatus for coating described in as claimed in claim 1 or 22 The method of film, wherein
The manufacturing method of the film comprises the following steps:
To by first to coating object on spray more than one 1st coating fluid be coated it is being formed, uncured and with It is described coating object movement and relatively move it is more than one 1st coating liquid layer on spray next 2nd coating fluid, come It is coated with the 2nd coating liquid layer；And
The 1st coating liquid layer and the 2nd coating liquid layer solidification is set to obtain film.
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