JPH0455344A - Method for applying non-flocculating resin solution and device for producing the resin-layer dry plate - Google Patents

Abstract

PURPOSE:To apply the non-flocculating resin soln. on a surface with good production efficiency in uniform film thickness without damaging the surface by horizontally conveying square glass substrates with the equal sides firmly attached to one another and continuously applying the resin soln. on a line of the substrates. CONSTITUTION:The equal sides of the square glass substrates 3i are closely attached to one another, the substrates are arranged and held on the same horizontal plane P, a conveying force is applied on the substrate line 3 by a conveyor, and the line is horizontally conveyed. A specified amt. of the paint 4 with the viscosity and drying rate controlled is continuously supplied on the continuously conveyed line from a coating head 1 to form a resin layer 41. By this method, necessary and sufficient production efficiency is optionally obtained, the difference in film thickness is not produced between the head and tail of the coated substrate by the smooth continuous coating, leveling effect and interaction between the surface tension and drying rate, and the coated surface is never damaged.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to the application of an organic solvent solution containing a lipophilic resin, and more specifically to the application of a relatively quick-drying, low-viscosity organic solvent solution to a glass substrate. Concerning continuous application of.

[Prior art]

Dipping coating, roll coating, and spinner coating methods are used as methods for applying relatively quick-drying, low-viscosity organic solvent resin solutions to flat substrates such as glass, or improvements to these methods have been proposed (1986 -83573, JP-A-63-
No. 107769, etc.).

The most commonly used dipping coating method is a method in which the substrate is once immersed in a coating solution and then pulled up and coated at a predetermined speed, and the film thickness can be regulated with considerable precision by adjusting the viscosity and pulling speed. .

However, it is essentially difficult to coat one side or partially, and there are drawbacks such as the needless amount of coating liquid to be prepared.

In addition, the spinner method is a method in which a coating liquid is supplied onto a rotating substrate and the coating liquid is spread and spread to a uniform thickness using centrifugal force.It is essentially a discontinuous method, and about half of the coating liquid is outside the substrate. The disadvantage is that it is necessary to shake it off, resulting in too much loss of coating liquid.

In addition, the roll coating method is a method in which the - part of the #ll liquid coating roll is immersed and the coating liquid is pulled up to a predetermined thickness on the surface by rotating the sleeve cloth roll, and the coating liquid is supplied by contacting the glass substrate. The coating liquid is applied thinly to the first coating area of the glass substrate.
It becomes thicker at the rear and lacks uniformity in film thickness.

However, the roll coating method described above has the possibility of continuous coating, and is considered to be a method worthy of attention from a production technology perspective.

For continuous coating, a vertical or inclined conveyance method may be used after coating, but this often involves contacting or gripping the undried coated surface, which naturally damages the coated surface. Also low viscosity,
Non-yiin liquids tend to cause streaks due to dripping.

Therefore, there are problems such as a narrow range of liquids that can be applied and low production efficiency.

Regarding coagulant gelatin solutions that change their sol-gel state depending on temperature, there is an old example of an overflow coating method in which they are supplied to a substrate by flowing down over a coating knife and applied horizontally continuously, but this method does not exhibit a sol-gel suspension. There are no examples of continuous coating of non-clumping, quick-drying, low-viscosity organic solvent resin solutions.

On the other hand, with a process configuration that supplies, coats, and dries the coating liquid for each substrate, it is inevitable that production efficiency will be low.In addition, there are major problems with the conventional method, which suffers from a large amount of coating liquid loss and lacks coating uniformity. I can say that there is.

[Purpose of the invention]

The purpose of the present invention is to provide a uniform coating film thickness, no damage to the coating surface, little liquid loss, and production efficiency when applying a non-coagulant resin solution to a rectangular glass substrate. The object of the present invention is to provide a coating method and apparatus with high performance.

[Structure of the invention]

The object of the present invention described above is to closely bond the mutually equal sides of a +11 rectangular glass substrate,
A coating method characterized in that a non-clumping resin solution is continuously supplied and applied to the glass substrate rows while horizontally transporting the glass substrate rows arranged in the transport direction on the same horizontal plane, and (2) the glass substrates. The apparatus for producing a resin layer dry plate produced by forming a coating layer of the non-flocculating resin solution thereon is equipped with at least means for separating and supplying a glass substrate, a continuous coating means, and a drying/carrying means. This is achieved by a resin layer dry plate manufacturing device.

The non-coagulant resin solution (hereinafter referred to as paint) used in the present invention is a resin dissolved in an organic solvent, and is used as a binder for various colorants, liquid crystal microcapsules, or their dispersoids. A dispersant, an antistatic or conductive agent, and if necessary a hardening agent can be included.

The paint according to the present invention has a viscosity of 0°5 to 5 at room temperature at the time of application.
00 cp, preferably adjusted to 10 to 50 cp.

Further, the drying speed can be adjusted so that the drying rate is completed within at least one minute after coating by adjusting the air volume, temperature, solvent, amount of solvent, or film thickness.

The binder used in the present invention is a resin soluble in an organic solvent, but from the viewpoint of dispersion of the dispersoid, a resin modified by introducing a functional group or a functional group that forms an inner salt, such as a modified chloride resin, is used as the binder. Vinyl resin, modified polyurethane resin, or modified polyester resin is preferred.

Furthermore, conventionally used unmodified vinyl chloride resins, polyurethane resins, or polyester resins can be used in combination as necessary, and cellulose resins, phenoxy resins, thermosetting resins, reactive resins, Alternatively, a so-called photosensitive resin or the like that is sensitive to electromagnetic waves and used as a resist may be used.

Examples of the photosensitive resin include polymethyl methacrylate, chloromethylated polystyrene, polyethyl methacrylate,
Examples include polyfluorobutyl methacrylate, novolak resin, and other resins used as resist resins.

Next, as a coloring agent mixed into the binder resin, Benzidine Yellow
w) G (C, 1, 21090), Benzidine Yellow G11 (C, 1, 21100), Permanent Yellow.

w) DIG (Hoechst product), Brilliant Carmine 6B
(C, 1, 15850), Rhodamine 6G Lake (La
Ke) (C, 1, 45160), Rhodamine B Lake (
C, 1,45170), Phthalocyanine Blue Non-Crystal
e non Crystal) (C, 1, 74160)
, phthalocyanine green (C, 1,74260)
, Carbon Black, Fat (Fa) Yellow 5G
, Fatt Yellow 3G, Fatt Red G2 Fatt Red HRR1 Fatt Red 5B, Fatt Black HB, Zapon First (2apon P
a5t) ・Black RE, Zapon First Black B, Zapon First Blue HPL, Zapon
Examples include Fast Red BB, Zapon Fast Red GE, Zapon Fast Yellow G1 Quinacridone Red (C11,465000), and these pigments should be contained in an amount of 1 to 50 parts by weight per 100 parts by weight of the binder resin. is preferred.

The liquid crystal microcapsules are preferably selected from smectic, nematic, and cholesteric liquid crystals that can respond electrically or optically.

The content of these liquid crystals is 1 per 100 parts by weight of binder resin.
It is preferable to contain up to 50 parts by weight.

In order to improve the durability of the resin layer of the present invention, coating 1 can contain various curing agents, such as aromatic and aliphatic isocyanates.

Dispersants used in the present invention include phosphoric acid esters, amine compounds, alkyl sulfates, fatty acid amides, higher alcohols, polyethylene oxides, sulfosuccinic acids, sulfosuccinic esters, known surfactants, and salts thereof. , also negative organic groups (e.g. -COOH)
It is also possible to use salts of polymeric dispersants having . These dispersants may be used alone or in combination of two or more.

As antistatic agents or conductive agents, conductive powders such as tin oxide antimony oxide compounds, titanium oxide-tin oxide antimony oxide compounds, natural surfactants such as saponin; alkylene oxide type, glycerin type, glycidol type etc. Nonionic surfactants, higher alkylamines, quaternary ammonium salts, pyridine, other heterocycles, cationic surfactants such as phosphonium or sulfonium; carboxylic acids, sulfonic acids, phosphoric acids, sulfuric acid ester groups, phosphoric esters Examples include anionic surfactants containing acidic groups such as amino acids, aminosulfonic acids, and amphoteric surfactants such as sulfuric acid or phosphoric acid esters of amino alcohols.

The solvents to be added to the tube material or the diluting solvent when applying this paint include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; alcohols such as methanol, ethanol, propatool, and butanol; and methyl acetate. , ethyl acetate, butyl acetate,
Esters such as ethyl lactate and ethylene glycol monoacetate Ethers such as nigericol dimethyl ether, glycol monoethyl ether, dioxane, and tetrahydrofuran: Aromatic hydrocarbons such as benzene, toluene, and xylene: Methylene chloride, ethylene chloride, carbon tetrachloride, Halogenated hydrocarbons such as chloroform and dichlorobenzene can be used.

Further, as the glass substrate, quartz glass, lead glass, chemically strengthened glass, borosilicate glass, etc. can be selected and used in accordance with optical, chemical, or electrical requirements.

The thickness of these substrates is between 0.1 and 5 am, preferably 0.
．． 5-2II11.

An intermediate layer for improving adhesiveness may be provided between the base and the resin layer.

In the present invention, the thickness of the resin layer provided on the glass substrate is
Although it is optimally selected depending on the form of use, the dry thickness is preferably 0.1 to 20 μm, preferably 0.1 to 5 μm in terms of coating.

Further, depending on the purpose, a functional layer such as a transparent conductive layer may be added in addition to the resin layer according to the present invention.

Next, the coating method of the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic diagram illustrating the coating method and apparatus of the present invention.

In the figure, 3 is a rectangular glass substrate 3t with mutually equal sides 3i.
This is a row of glass substrates E closely bonded and arranged and held on the same horizontal plane P. A conveyance force is applied to the substrate row by the conveyance drive device l15, and the substrate row is conveyed horizontally.

A predetermined amount of m-material 4 whose viscosity and drying speed have been adjusted is continuously supplied from the coating head 1 onto the row of substrates that are connected and conveyed continuously to form a resin layer 41.

Furthermore, the liquid mixing device will be specifically explained.

Reference numeral 6 refers to a sorting and supplying unit that picks up glass substrates placed side by side or stacked one on top of the other from a glass substrate base, aligns them with the glass substrate surface P, and supplies them to a pair of drive rolls 51 and 51'' of the transport drive device 5. It is a means.

The drive roll 5■ is driven by a motor 53. When a newly supplied substrate 30 is closely bonded to the preceding substrate 31, the drive control of the supply roll 61 is performed by the position sensor 54, and the substrate 30 is bonded to the row of glass substrates without impact, thereby eliminating irregularities in the steps. is prevented.

The substrate 30 bonded without impact becomes a member 31 of the substrate row 3 and is placed on the horizontal conveyance by the driven roll 51.

2 and 2' (not shown) are guide plates for the substrate rows, the upper edges of which are folded inward to prevent the glass substrates from protruding from the substrate cutting surface.

FIG. 2 shows an example of the separating and supplying means. Reference numeral 8 denotes glass substrates placed in parallel on a glass substrate, placed on an endless belt 65, and conveyed as the glass substrates are supplied.

Reference numeral 63 denotes a handling roll whose surface is made of soft rubber, which contacts the edge of the substrate, scrapes it off one by one by rotation, places it on the second endless supply belt 61, and then transfers it to the second endless supply belt 61. The cutting surface P is aligned with the cutting surface P of the substrate.

64 is a gap for avoiding impact propagation.

7 is a means for drying and carrying out the coated substrate.

In the present invention, the coating speed of the m material with adjusted drying speed and viscosity is 0.1 to 6 m/win, preferably 0.3 to 1 m/win.
．． 5g+/sin.

According to the aspect of the present invention, the necessary and sufficient production efficiency can be obtained arbitrarily, and the film thickness difference at the beginning and end of the wire cloth substrate due to the interaction between surface tension and drying rate can be reduced by smooth continuous coating and horizontal effect. It will never occur. Also, the cover surface will not be damaged.

(Example) A paint having the following composition was prepared and applied to 100 glass substrates according to the embodiment of the present invention, and the occurrence of uneven coating and liquid loss rate were checked. Carbon black was used as a pigment to check for coating unevenness.

(1) Glass substrate borosilicate glass, thickness 1mm, 30x30ad (2) Paint composition Parts by weight Sulfo-modified PVC resin 12 Polyurethane resin
6cyclohexanone
150 methyl ethyl ketone
100 toluene 10
0 Carbon black 7 Stearic acid l Butyl stearate 1 (3) Coating speed 0.5, 1.0, 1.5, 2.0 m/5 in (4) Drying conditions 60°C, air flow 10r+? /sin As a result of visually evaluating the coating unevenness of the samples obtained as described above, all of them were found to be usable for practical use.

In addition, the ratio of the amount of coating liquid to the remaining coating liquid was only 5%.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram illustrating the coating method and apparatus of the present invention. FIG. 2 is a side view of a configuration example of the separating and supplying means according to the present invention. DESCRIPTION OF SYMBOLS 1... Coating head, 2... Guide plate, 3... Glass substrate row, 31... Glass substrate, 4...
- Paint, 41... Resin layer, 5... Conveyance drive device, 6... Sorting and supplying means, 7... Drying/carrying out means.

Claims (2)

[Claims] (1) Closely bonding equal sides of a rectangular glass substrate,
A coating method characterized by continuously supplying and applying a non-clumping resin solution to the glass substrate arrays while horizontally conveying the glass substrate arrays arranged in the conveyance direction on the same horizontal plane. (2) A manufacturing apparatus for a resin layer dry plate created by forming a coating layer of the non-clumping resin solution on the glass substrate includes at least a means for separating and supplying the glass substrate, a means for continuously coating, and a means for drying and transporting the glass substrate. An apparatus for manufacturing the resin layer dry plate, comprising: