JP3338693B2 - Die set for stripe coating and method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention also relates to the stripe coating die set and the way, and more particularly relates to the die set and the way for applying three types of different stripe at a time.

[0002]

2. Description of the Related Art Die coating technology has been used for large area continuous coating since the 1950's and is currently used in various fields such as information electronic equipment. Among them, stripe coating, a special coating technology,
Applying two technologies, die design and precision coating, a resin thin film such as paint or adhesive is applied to the substrate in stripes (str
This is what it does.

[0003] Although this technology has been traditionally used for adhesive tape products, it is nowadays applied to the production of advanced electronic fields such as laser printers, lithium batteries, and even flat displays. I have.

[0004] Such a stripe coating technique is divided into two types, one is an on-off type, that is, one in which a stripe of the applied stripe, for example, a stripe of an adhesive is applied to a substrate while being separated from each other. Do not apply adhesive between the muscles. Therefore, a stripe is formed depending on the presence or absence of the adhesive applied to the base material. USP4,10
US Pat. No. 6,437 discloses this application, in which a specially designed slide is inserted into a die, which blocks some paint from being extruded and forms a glue-free area. Further, Japanese Patent Application Laid-Open Nos. 8-99,056 and 9-2
No. 20,503 discloses, as a similar method, applying a stripe having a stripe width of 1 mm or less.

[0005] Another type is called ABAB type, which is a stripe pattern composed of two different stripes of A and B, for example, a pattern made of two different adhesives is arranged in a mutually overlapping manner. A typical example of this is U
In SP4,533,510, the stripe is formed by placing a paint distribution block in a distribution pipe and contacting two kinds of paints A and B for the first time before entering a gap. In US Pat. No. 4,731,004, different barriers are installed at different positions of the feed port, and the width at the exit of the die varies.
A technique for obtaining a BAB type stripe is disclosed.

[0006] These patents are premised on the fact that they are mostly used for extruding polymer adhesives, and ABAB-type stripe coating cannot be obtained by such a design with a low-viscosity coating fluid. In contrast, USP 5,73
No. 3,608 and JP-A-7-136,568 disclose that a barrier is inserted into a gap and the coating is brought into contact with the die before the exit of the die to form an ABAB type stripe.

Japanese Patent Application Laid-Open Nos. 8-099956 and 10-277460 also disclose techniques for forming ABAB stripes.
In the case of coating liquids with different properties, these coatings do not provide sufficient contact time in the gap between the dies, and these coatings are extruded from the die to form a stripe coating with a clear interface Not done.

[0008] Each of the above patents mentions only two types of paint coating stripes, and all of them are ABCA.
It does not disclose a method of applying stripes of three different paints such as BC and A_B_C. The symbol “_” indicates a space between stripes of a stripe, that is, a portion where no adhesive is attached, for example, in a stripe pattern formed of an adhesive.

By the way, among flat displays, S
The color filters of TN-LCD and LCD (liquid crystal display) such as TN-LCD are strip filter films of R (red), G (green), and B (blue) three colors each having a width of about 100 μm by a photolithography method. Is formed. Therefore, it is necessary to execute a similar and complicated photolithography process three times for each color.

In the case of a plasma display (PDP), the height is about 100 μm by screen printing.
Phosphors of three colors of R, G and B having a width of about 50 μm are applied to the glass substrate, but this process does not reach the required thickness unless it is repeated about ten times.

Further, regarding the design of a stripe type coating die, Wen Heng Heng and Liu Da Ko have been described in Polym. Eng. Sc
i. , 35, 759 (1995) discusses a coating technique for "presence / absence" type stripes, puts a T-type die and a hanger-type die into a shim, and discloses the uniform distribution of outlets. It can be a document. In addition, in the Republic of China Patent Application No. 87118645 filed by the present inventors, a coating die for producing a stripe and a method for producing the same have already been filed. It only discloses a die and these methods can only extrude two different coatings at the same time.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a main object of the present invention is to allow three different substances to be applied at once and simultaneously. The present invention provides a very powerful and novel stripe coating apparatus and method, and a stripe product, which can greatly reduce the complexity of equipment and the cost of capital investment.

[0013]

SUMMARY OF THE INVENTION The present invention utilizes a coating die that generally produces a uniform film, adds a shim to guide the flow, and a guide die that combines the function of guiding and uniform coating. The paints originally placed in different positions by the combined combination are gathered and pushed out on the same plane, thereby expressing a stripe application of a different stripe pattern such as ABCABC or A_B_C.

ABCAB is added to the substrate completed according to the present invention.
The die set used to form the C or A_B_C stripe application is one B die, one B shim,
It consists of one guide shim, one A shim, one guide die, one C shim and one C die.

The guide die includes a plurality of spaced apart C paint distribution blocks protruding from one first surface of the guide die, and one C protruding from a second surface opposite to the first surface. A paint blocking block, a plurality of C paint distribution passages that communicate the C paint distribution block and the C paint blocking block, one A-recess tank provided on the first surface, and an A paint that communicates with the A-recess tank Includes purchase openings.

The guide shim includes a plurality of spaced-apart B paint distribution blocks protruding from a first surface of the guide shim, and one B paint rejection projecting from a second surface opposite the first surface. A block, and a plurality of B paint distribution passages communicating the plurality of B paint distribution blocks and the B paint blocking block.

The A shim is tightly sandwiched between the first surface of the guide shim and the first surface of the guide die, and the A shim has the same thickness as the C paint distribution block and the B paint distribution block. Wherein the plurality of C paint shunting blocks and the B paint shunting blocks are adjacent to each other and form a shunting block that combines a plurality of spaced BC paints;
The shim has a shape that partially surrounds the A-concave tank and the C-paint distribution block, so that the A-paint introduced into the A-concave tank from the A-paint supply port is provided only in a gap between the plurality of BC paint distribution blocks. And flows out of the gap between the first surface of the guide shim and the first surface of the guide die in a direction away from the A-concave tank.

The B die has one B paint supply port and one B concave tank communicating with the B paint supply port.

The B shim is tightly sandwiched between the second surface of the guide shim and the B die, the B shim is the same thickness as the B paint blocking block, and the B shim is The B tank has a shape that can partially surround the concave tank, and the B shim is tightly sandwiched between the B paint blocking block, and the B paint introduced into the B concave tank from the B paint inlet is the plurality of B paints. It flows only from the gap between the B paint distribution blocks and flows to the first surface of the guide shim.

The C die has one C paint inlet and one C concave tank communicating with the C paint inlet.

The C shim is tightly sandwiched between the second surface of the guide die and the C die, the C shim is the same thickness as the C paint blocking block, and the C shim is The C-shaped shim has a shape that can partially surround the concaved tank, and the C shim is tightly sandwiched between the C-paint blocking block. It flows only from the gap between the C paint distribution blocks and flows to the first surface of the guide die.

Preferably, the plurality of C paint distribution blocks and the B paint distribution blocks each have an inverted U shape, and are located between one head, two legs and the two legs. There is an outlet for one diverting passage, and the two legs are directed in a direction to discharge the A paint to the die set. More preferably, the two legs have the same length.

Preferably, the length of one of the two legs in the direction in which the A paint flows out of the die set does not extend to the edge of the guide die. When the C paint is simultaneously introduced into the A paint supply port, the B paint supply port, and the C paint supply port, respectively, the A paint, the B paint, and the C paint come into contact with each other at the ends of the two legs, An ABCABC stripe coating film adjacent to each other is formed.

Also, the two legs may be formed to have a shape extending between the edges of the guide die. In this case, different A paints, B paints, and C paints are simultaneously supplied to the A paint supply port, respectively. , B paint, and C paint, when introduced into the paint inlet, the A paint, B paint, and C paint do not come into contact with each other in the die set, thus forming A_B_C stripe coated films separated from each other. .

The present invention provides a method for forming a stripe coating on a substrate, comprising the following steps using the die set of the present invention.

In the stripe coating method according to the present invention, different A paints, B paints, and C paints are simultaneously applied to the A paint inlet, the B paint inlet, and the C paint inlet of the die set according to the present invention, respectively. Introduced, the base material is continuously passed from below the gap, and the A paint, B paint, and C paint flowing out from the gap are attached to the surface of the base material, and are adjacent to each other on the surface of the base material. An ABCABC stripe or A_B_C stripe coating spaced apart is formed.

The method of the present invention further comprises changing the thickness of the A shim and the protrusion height of the B and C paint distribution blocks.
The flow rates of the A paint, B paint, and C paint introduced into the die set are adjusted, and the thickness of the stripe coating is adjusted.

The present invention also provides an ABC comprising different ABCABC stripes applied to a surface of a flat substrate.
An ABC stripe coated product is provided. In this product, a set of at least three different types of stripe stripes ABC is formed as one set, and the set of ABC stripes is simultaneously formed integrally, and each stripe has a uniform width of 200 μm or less.

The present invention also provides a different and spaced apart A_B_C stripe coating product applied to the surface of a flat substrate. In this product, a set of at least three types of different stripe stripes A_B_C is formed as one set, and the set A_B_C stripes are formed integrally at the same time, and adjacent stripes are formed so as to be separated from each other. It has a uniform width of 200 μm or less.

Each product stripe has a width of 20
It is preferable that the thickness be 1 to 150 μm and the thickness be 1 to 50 μm. The stripes of A, B and C are each red,
Green and blue are preferred.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a die set according to a preferred embodiment of the present invention will be described. 1 and 2
3 is a drawing showing a die set of the present embodiment.

The die set includes upper die 1B, B paint shim 2B, guide shim 3, A paint shim 2A, guide die 4, C
Includes paint shim 2C and lower die 1C. This die set is roughly divided into the following four parts. First, the outer structure of the ABCABC stripe coating die consisting of a T-type upper die 1B and a lower die 1C. Second, a shim 2 that determines the thickness of each coating layer. Guide shim 3 to be introduced into the merging plane (guide die 4), and fourthly,
A guide die 4 for uniformly distributing the A paint charged in the middle, introducing the C paint charged from the lower die 1C into the merging plane, and extruding it together. Generally, a T-die for producing a single film does not include the guide shim 3 and the guide die 4.

That is, the main part of this die set is
A T-die upper die 1B, a T-die lower die 1C, and a shim 2 (2A, 2B, 2C) sandwiched and fixed therebetween, which are fastened by screws (not shown) through the screw holes 11. I have. The upper die 1B and the lower die 1C have the same structure.

Referring to FIG. 3, the concave tank 12 of the upper die 1B or the lower die 1C is referred to as a diversion tube (1B in the illustrated case).
The main effect is that the paint coming in from the inlet 7 is evenly distributed in the lateral direction (X), and at the same time flows in the machine direction (Y) and passes through the openings in the shim 2B. Extrusion of extruded film.

Referring now to FIG. 4, the guide die 4 comprises three spaced apart C paint distribution blocks 19 projecting from the first surface 6 of the guide die 4 (see FIGS. 4A, C). The C paint blocking block 21 protruding from the second surface 6 ′ (see FIGS. 4B and 4C) opposite to the one surface 6, and three C paint blocks that communicate the three C paint distribution blocks 19 and the C paint blocking block 21. Flow passage 18 (see FIG. 4C), first surface 6
And an A paint supply port 22 communicating with the A paint concave tank 12A and the A concave tank 12A.

Referring now to FIG. 5, the guide shim 3 comprises three B paint distribution blocks 15 which are separated from each other and protrude from the first surface 5 of the guide shim 3 (see FIGS. 5B and 5C). A second surface 5 'of the guiding shim 3 opposite to the first surface 5 (FIG. 5)
A and C), and three B paint distribution passages 14 (FIG. 5C) that communicate the B paint distribution block 15 and the B paint prevention block 17.
Reference).

The A paint shim 2A is tightly sandwiched between the first surface of the guide shim 3 and the first surface of the guide die 4 (see FIGS. 1 and 2). The A paint shim 2A, the C paint distribution block 19 and the B paint distribution block 15 are all the same thickness, and the three C paint distribution blocks 19 and the three B paint distribution blocks 15 (shown by dotted lines in FIG. 4) Adjacent to each other, three pairs of separated BC paint merged shunt blocks are formed.

As shown in FIG. 6, the shape of the A paint shim 2A is such that it surrounds three edges of the first surface of the guide die 4 so that the A paint introduced into the A paint concave tank 12A from the A paint supply port 22. The first surface 5 of the guide shim 3 and the guide die 4 are made so that the flow 8 flows only toward the gap between the three pairs of BC paint merged shunt blocks (portion indicated by “A” in FIG. 4).
Flows out of the gap between the first surfaces 6 in the direction away from the A-concave tank 12A, and is discharged from the die set.

The B paint shim 2B and the C paint shim 2C
A paint shim 2A has the same shape as B paint shim 2A.
The B paint shim 2B and the B paint blocking block 1 are tightly sandwiched between the second surface of the guide shim 3 and the guide die 4, and the B paint shim 2B and the B paint blocking block 1 have the same thickness.
7 are tightly joined, and the B paint 9 introduced into the concave tank 12 from the inlet 7 of the upper die flows into the three B paint distribution passages 14 and the first surface of the guide shim 3. 5
Flows to Similarly, the C paint 10 introduced into the lower die 1C from the inlet 7 'of the lower die 1C flows into the three C paint distribution passages 18 and flows to the first surface 6 of the guide shim 4.

Each of the C paint distribution block 19 and the B paint distribution block 15 has an inverted U shape, and has one head, two legs, and one distribution passage between the two legs. It consists of an exit. The two legs 20 of the C paint distribution block 19 (see FIG. 4) are equal in length to the two legs 16 of the B paint distribution block 15 (see FIG. 5), and the length is one edge of the guide die 4. Not reached. For this reason, when the A paint 8, the B paint 8, and the C paint 10 are simultaneously introduced into the die set, respectively, the B paint 9 and the C paint 10 are diverted from the branch passage openings of the B paint distribution block 15 and the C paint distribution block 19, respectively. It flows out of 14 ′ and 18 ′ and contacts each other at the ends of the two legs 16 and 20 and merges with the A paint 8.

As described above, the B paint and the C paint pass through the specific positions of the guide shim 3 and the guide die 4, respectively.
4, 18), merges from the original flow plane to the merge plane (first plane) of the guide die 4 and is extruded together, and stripes by three different types of stripes, that is, ABCABC
A stripe application pattern is formed.

Accordingly, the ABCABC stripe coating dies basically have three sets of dies “1B, 2B, 3” and “2”.
One special die set consisting of “A, 4” and “4, 2C, 1C” can be used.

The B paint, the C paint, and the A paint are supplied to the upper die 1B and the lower die 1C, respectively.
(See FIG. 2) and the inlet 22 of the guide die 4. The purchase opening 22 (see FIG. 4) of the guide die 4 is originally a center purchase type, but is disposed at a position slightly moved from the center to a side by a small distance depending on the position of the combination bolt. ing. Numerical analysis showed that this movement did not affect paint outlet uniformity. Therefore, an ABCABC stripe pattern can be manufactured by the above method.

According to the same method, as shown in FIG. 7, the B paint distribution block 15 and the C paint distribution block 19
When the legs 16 and 20 of the book are extended to the edge of the guide die 4, the A paint, the B paint, and the C paint do not come into contact with each other in the die set, so that it is also possible to form an A_B_C stripe application pattern.

Further, when a plurality of the die sets according to the present invention are arranged in parallel, the ABC having the increased total width can be formed on one base material.
An ABC or A_B_C stripe application pattern can be formed.

(Examples) Hereinafter, more specific examples will be described, but the present invention is not limited to these examples.

The die shown in FIG. 1 is used for ABCABC stripe coating. The dimensions of the main parts are as follows: coating width 100 mm slot gap thickness 0.5 mm gap length 28 mm diameter of diverter tube 30 mm The shape of the branch tube (cavity shape) The anti-tear drop type (die-lip thickness) 1 mm The width of the stripe of the stripe (strip width) 1 mm.

The A_B_C stripe die is different from the above ABCABC stripe die in the following parts.

Stripe width 0.77 mm Others are the same as the above ABCABC stripe die.

As a result of numerical analysis of the application fluid using these two dies, the uniformity of the outlet is close to 1 under the same flow rate of the die unit width, that is, the flow rates of the unit die width are all the same.

The experimental fluids (A, B, C) were all polyvinyl alcohol (PVA) having a viscosity of 636.2 cps.
It is an aqueous solution and the substrate used is DuPont Meline.
x White polyethylene terephthalate (TET) film.

The fluids A, B, and C have red, green,
Add a blue pigment to color and distinguish it, ABC
By using an ABC stripe die to adjust the flow rate of each of the inlets to 18, 24, and 18 g / cm ³ , the AB
A CABC stripe coating pattern was obtained.

Similarly, the fluids A, B, and C are respectively distinguished by red, green, and blue pigments, and the flow rates of the respective inlets are set to 21, 28, and 2 using an A_B_C stripe die.
At 1 g / cm ³ , an A_B_C stripe coating pattern was obtained.

Of course, there is no problem of interface pressure in such a stripe coating. The flow rate of the unit width can be changed within a reasonable range according to the demand of each paint.

The die set of the present invention can be completed by a general die manufacturing technique.
In the case of a width of 50 μm, the die set of the present invention can be manufactured by a highly precise manufacturing technique, and the error can be controlled to ± 1.0 μm.

Further, as can be seen from the above embodiments, since different stripe patterns can be colored by adding a pigment, R, G and B color filter products can be easily manufactured. .

[0057]

As described above, according to the present invention,
Depending on the design of the special flow path in the extrusion die, three different paints A, B and C are brought into contact with each other at the die exit and aligned with ABCABC, or with A_B_C spaced apart from each other The striped coating pattern thus formed can be formed by a single coating operation.

[Brief description of the drawings]

1 is a three-dimensional view of an ABCABC stripe coating die set combined according to the present invention.

FIG. 2 is an exploded perspective view of the die set in FIG.

FIGS. 3A and 3B are a top view and a side view of an upper die 1B of a T-type die in FIG.

FIGS. 4A, 4B, and 4C are views showing the lower, upper, and side surfaces of the guide die 4 in FIG.

5A, 5B and 5C are views showing the lower, upper and side surfaces of the guide shim 3 in FIG.

FIG. 6 is a top view of the shim 2 in FIG.

FIG. 7 is a bottom view of a guide die for forming an A_B_C type stripe of the present invention.

[Explanation of symbols]

 1B: upper die, 2, 2A, 2B, 2C: shim, 3: guide shim, 4: guide die, 1C: lower die, 12, 12A: concave tank, 7, 7 ', 22: paint inlet, 15, 19: paint distribution block, 17, 21: paint blocking block, 14, 18: distribution passage, 14 ', 18': distribution passage opening.

Continuation of the front page (56) References JP-A-7-230085 (JP, A) JP-A-8-229480 (JP, A) JP-A-8-99056 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) B05C 5/02 B05B 1/04 B05D 5/06 101 G02B 5/20 101

Claims (8)

(57) [Claims] 1. A die set used for applying and forming three different stripe patterns, comprising: one B die, one B shim, one guide shim, one A shim, one guide die, The guide die includes a plurality of spaced apart C paint distribution blocks protruding from a first surface of the guide die.
A C paint blocking block protruding from the second surface opposite to the surface, a plurality of C paint distribution passages connecting the C paint distribution block and the C paint blocking block, and a C paint distribution passage provided on the first surface. The guide shim includes a plurality of spaced-apart B paint distribution blocks protruding from a first surface of the guide shim. 1
A B paint blocking block protruding from the second surface opposite to the surface, a plurality of B paint distribution passages communicating the plurality of B paint distribution blocks and the B paint blocking block, and the A shim includes: , Tightly sandwiched between a first surface of the guide shim and a first surface of the guide die, wherein the A shim is
The paint shunt block and the paint shunt block having the same thickness as the paint shunt block and the paint shunt block; and wherein the plurality of paint shunt blocks and the paint shunt block are adjacent to each other and form a shunt block combining a plurality of spaced BC paints; The shim is configured so as to partially surround the A-concave tank and the C-paint distribution block, and the A is introduced into the A-concave tank from the A-paint supply port.
The paint flows only into the gap between the plurality of BC paint distribution blocks, and flows out of the gap between the first surface of the guide shim and the first surface of the guide die in a direction away from the A-concave tank. The B die has one B paint supply port and one B concave tank communicating with the B paint supply port. The B shim includes a second surface of the guide shim and the B die. The B shim is the same thickness as the B paint blocking block, the B shim is shaped to partially surround the B concave tank, and the B shim is The B paint, which is tightly sandwiched between the paint blocking blocks and introduced into the B-concave tank through the B paint supply port, flows only through a gap between the plurality of B paint distribution blocks, and the first surface of the guide shim. So that the C die has one A paint reservoir and one C-concave tank communicating with the C paint reservoir, wherein the C shim is tightly sandwiched between the second surface of the guide die and the C die; Is the same thickness as the C paint blocking block, the C shim is shaped to partially surround the 10 C recessed tank, and the C shim is tightly sandwiched between the C paint blocking block, The C paint introduced into the C-concave tank from the C paint supply port flows only from a gap between the plurality of C paint distribution blocks, and flows to the first surface of the guide die. Die set. 2. The plurality of C paint distribution blocks and B
Each of the paint distribution blocks has an inverted U-shape, and has one head, two legs, and an outlet of one distribution passage between the two legs. The leg is A
The die set according to claim 1, wherein the paint is directed in a direction in which the paint flows out of the die set. 3. The die set according to claim 2, wherein the two legs have the same length. 4. A length of a direction in which one of the two legs causes the A paint to flow out of the die set does not extend to an edge of the guide die, and is different from each other.
When each of the B paint and the C paint is simultaneously introduced into the purchase port of the A paint, the purchase port of the B paint, and the purchase port of the C paint, the two paints of the A paint, the B paint, and the C paint are obtained. 4. The die set according to claim 3, wherein the end portions of the legs contact each other to form a stripe-coated film made of A paint, B paint, and C paint. 5. The two paint legs extend to the edge of the guide die, and different A paint, B paint, and C paint, respectively, are the inlets for the A paint and the B paint, respectively. And the C paint are introduced into the inlet of the C paint, the A paint, the B paint, and the C paint flow out without contact with each other in the die set, and the A paint, the B paint,
4. The die set according to claim 3, wherein a stripe-coated film having a space between the paint and the C paint is formed. 6. A method for forming a stripe coating film on a base material using the die set according to claim 1, wherein different A paints, B paints, and C paints are simultaneously supplied to the A paints, respectively. And the base material for applying the stripe coating is continuously introduced from below the gap, and the A paint and the B which flow out from the gap are introduced into the B paint supply port and the C paint supply port.
A paint and a C paint are adhered to the surface of the substrate, and the A paint, the B paint, and the C paint are in contact with each other on the surface of the substrate, or between the A paint, the B paint, and the C paint. A stripe coating method characterized by forming stripes at intervals. 7. The thickness of said A shim and said B,
The thickness of the stripe coating is adjusted by changing the protrusion height of the C coating distribution block or adjusting the flow rate of the A coating, the B coating, and the C coating introduced into the die set. The stripe coating method according to claim 6, wherein 8. The method according to claim 6, wherein the A paint, the B paint, and the C paint are red, green, and blue, respectively.