JPH0455347A - Method and device for applying oily resin solution - Google Patents

Abstract

PURPOSE:To apply an oily resin soln. in uniform film thickness with loss of the soln. reduced and with high production efficiency by continuously applying the soln. on a glass substrate line which is arranged and held in a specified manner under horizontally conveying. CONSTITUTION:The equal sides of square glass substrates are firmly attached to one another to form a substrate line which is floated by air pressure and conveyed on the same plane. A conveying force is exerted on the rearmost substrate, and an oily resin soln. is continuously applied. The viscosity of the paint to be used is controlled to 0.5-500 cp at room temp. during the application. The drying is finished within at least one minute after application by adjusting the air quantity, temp., solvent, amt. of solvent or film thickness. Although a resin soluble in org. solvent is used for the binder to be used, a resin modified by introducing a functional group or the functional group forming an intermolecular salt is preferably used from the standpoint of the dispersion of the dispersoid.

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 comparatively quick-drying, low-viscosity organic solvent resin solutions to flat substrates such as glass, or improvements to these methods have been proposed (1983). -83573, JP-A-63-
No. 107789, 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, making it possible to control the film thickness with considerable precision by adjusting the viscosity and pulling speed. .

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

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 a part of the coating roll is immersed in the coating liquid, the coating liquid is pulled up to a predetermined thickness on the surface by rotation of the coating roll, and the coating liquid is supplied by contacting the glass substrate. The film is thin at the first coated part of the glass substrate, but thicker at the rear, resulting in a lack of 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.

Regarding hydrophilic gelatin solutions that undergo a sol-gel state change depending on temperature, there is an example of an overflow coating method in which the coating solution is flowed down over a coating knife and supplied to the substrate for horizontal continuous coating. There are no examples of continuous coating of fast-drying, low-viscosity organic solvent resin solutions that do not exhibit conditions.

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

[Purpose of the invention]

An object of the present invention is to provide a coating method and apparatus that has a uniform coating thickness, little liquid loss, and high production efficiency in coating an oil-based resin solvent solution onto a rectangular glass substrate.

[Structure of the invention]

The object of the present invention is to (11 square glass substrates whose equilateral sides are tightly bonded to each other, floated by air pressure, and arranged and held on the same plane, apply a conveyance force to the last substrate in the row, horizontally A coating method characterized in that an oil-based resin solution is continuously applied while being conveyed, and (2) the horizontal continuous coating device for applying the oil-based resin solution onto a glass substrate comprises at least a plurality of rows parallel to the coating head and the conveying direction. This is achieved by a coating device characterized in that it is equipped with a conveyance device provided with a row of air jet holes.

In an aspect of the present invention, in order to avoid disturbance of the substrate row due to air jetting from the substrate joining portion, air jetting from an air jetting hole at a passing point of the substrate joining portion of the glass substrate row being floated and conveyed is provided. , is preferably stopped sequentially at a time point corresponding to passing through the bonding area and restarted after passing through the bonding area, and since the substrate conveying force in the application area is applied via the bonding area, the glass substrates are transferred in a floating manner to the array of glass substrates. It is preferable that supply and bonding of the substrates be controlled without impact.

The oil-based resin solution (hereinafter abbreviated as paint) used in the present invention is
A resin is dissolved in an organic solvent, and the resin is used as a binder for various coloring agents, dispersants for liquid crystal microcapsules or their dispersoids, antistatic or conductive agents,
A curing agent may be included if necessary.

The paint according to the present invention has a viscosity of 05 to 50 at room temperature at the time of application.
It is adjusted to 0 cp, preferably 10 to 50 cp.

Further, the drying speed can be adjusted so that the drying speed is completed within at least 1 win after coating by adjusting the air volume, temperature, solvent, amount of solvent, or film thickness.

The binder used in the present invention may be a resin soluble in an organic solvent, or a resin modified by introducing a functional group or a functional group that forms an inner salt from the viewpoint of dispersion of the dispersoid, such as a modified chloride resin. 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, if necessary, as well as cellulose resins, phenokine resins, thermosetting resins, and reactive resins. Alternatively, a so-called photosensitive resin sensitive to electromagnetic waves 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 Yel
low) G (C, 1, 21090), Hensidine Yellow Gll (C, 1, 21100), Permanent
Yell - (Permanen) Yell.

w) DHG (Hoechst product), Brilliant Carmine 6B
(C, 1, 15850), Rhodamine 6G Lake (La
Ke) (C, 1,45160), Rhodamine B Lake (C, 1,45170), Phthalonanine Blue Non-Crystal (F'hLhalocyanine B
tue non Crystal) (C, 1,7416
0), Phthalocyanine Green (C, 1,7426
0), Carbon Black, Fat (Fa) Yellow 5G, Fat Yellow 3G, Fat Red G1
Fat Red HRR1 Fat Red 5B, Fat Black B1 Zapon First
Pa5t) ・Black RE, Zabodo First Black B1 Zapon First Blue 1 (PL, Zapon First Red BB, Zapon First Red GE, Zabodo First Yellow G1 Quinacridone Red (C, 1,465,000 ), and these pigments are preferably contained in an amount of 1 to 50 parts by weight per 100 parts by weight of the binder resin.

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, various curing agents can be included in the coating material, such as aromatic and aliphatic isoneanates.

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 a negative organic group (e.g. -COO) I
) can also be used.

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-based, glycerin-based, glycidol-based Nonionic surfactants such as higher alkyl amines, quaternary ammonium salts, pyridine, other heterocycles, phosphoniums or sulfoniums; carboxylic acids, sulfonic acids, phosphoric acids, sulfate ester groups, phosphoric acids Examples include anionic surfactants containing acidic groups such as ester groups; amphoteric surfactants such as sulfuric acid or phosphoric acid esters of amino acids, aminosulfonic acids, and amino alcohols.

Solvents to be added to the paint or diluting solvents during application of this paint include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and nclohexanone; alcohols such as methanol, ethanol, propatool, and butanol; methyl acetate. , ethyl acetate, butyl acetate,
Esters such as ethyl lactate and ethylene glycol monoacetate; ethers such as glycol 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 dichlorohenzene 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 ml, preferably between 0.5 and 2 mm.

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 .mu.m, more preferably 0.1 to 5 .mu.m.

Further, depending on the application, a functional layer such as a transparent electrode 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 indicates that rectangular glass substrates 31 have mutually equal sides 3i.
This is a row of glass substrates E closely bonded, floated by air pressure, and arranged and held on the same plane P. In the substrate row, a conveyance force is applied to the last substrate 31 by the conveyance drive device 5 via its side 31B, and the substrate is conveyed horizontally.

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

Furthermore, the coating device will be specifically explained.

Reference numeral 6 denotes a sorting and supplying means that separates the glass substrates arranged side by side or stacked one by one from the nitrogen-containing glass substrates, aligns them with the glass substrate surface P, and supplies them to the drive roll 51 of the transport drive device I5.

The drive roll 51 is driven by a motor 53. When a newly supplied substrate 30 is closely bonded to the preceding substrate 31, the supply roll 6 is driven and controlled by the position sensor 54, and is bonded to the glass substrate row without impact to prevent uneven coating. or be prevented.

The substrate 30 bonded without impact becomes a member 31 of the substrate row 3 and is carried on floating conveyance.

In the present invention, the floating and holding of the glass substrate array is carried out by the air ejection tube array 2 formed by the air ejection tubes 2i (i-1, 2, . . . , n).
carried out by

FIG. 2 shows the configuration rows of the ejection tube array 2. Figure (a)
1 is a plan view of the ejection tube array, and FIG. 3B is a sectional view taken along a plane A-A perpendicular to the conveying direction of the substrate array.

It is preferable that the ejection pipes 21 are arranged in parallel at right angles to the conveying direction. Each jet pipe 21 has a plurality of air jet holes 21J (j=1
．． 2. .

Reference numerals 55 and 55' designate guide plates for the substrate rows, the upper edges of which are folded inward to prevent the glass substrates from protruding from the substrate surface.

Reference numeral 22 denotes a blowing pipe connected to an air compressor or compressed air cylinder 21 and communicating with each ejection pipe 2I. Spout hole 2I
The air blown out from the ” keeps the glass substrate floating. The floating blade is provided by the dynamic pressure of the ejected air flow, and the static pressure mainly has the effect of preventing substrate vibration or providing cushioning.

Note that the guide plate of the substrate row is provided with a bonding portion detection sensor, and when the substrate bonding portion touches the ejection pipe 21, air ejection is stopped and resumed after passing.

In the figure, 3' indicates the assumed position of the substrate row 3, and the flying height h between the top surface of the jet tube array 2 and the back surface of the board row is determined by adjusting the air pressure according to the weight and area of the board and the number of jet holes per board. ,
Preferably the number of bacteria is 0.5 to 2.

Reference numeral 7 denotes a means for drying and carrying out the coated substrate, which is sent to the carrying out packaging process.

In the present invention, the coating speed of the paint with controlled drying speed and viscosity is 0.1 to 6 m/win, preferably 0.3 to 1 m/win.
．． It is 5m/sin.

According to the aspect of the present invention, the necessary and sufficient production efficiency can be obtained arbitrarily, and the difference in film thickness at the beginning and end of the coated substrate due to the interaction between surface tension and dryness due to the continuous effect with no breaks between the substrates. will not occur.

〔Example〕

A paint having the following composition was prepared and applied to 10 glass substrates according to the embodiment of the present invention, and the occurrence of uneven coating and liquid loss rate were checked. A carbon blank was used as the pigment to check for coating unevenness.

(1) Glass substrate borosilicate glass, thickness 2mm, 30x30ci, weight 40
0g (2) Paint composition Weight parts Sulfo-modified PVC resin 12 Polyurethane resin 6 Cyclohexanone 150 Methyl ethyl ketone
100 toluene
100 carbon black
7 Butyl stearate 1 (3) Levitation and maintenance conditions Number of ejection holes 256/substrate diameter 2 Pneumatic pressure 1 kg/cn+ (4) Coating speed 0.5.1.0.1.5.2. On/m1n (5) Drying conditions 60℃, air volume 10n? /win 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 liquid loss was limited to 5% in a coating batch of 100 sheets, with the ratio of coating liquid amount to coating residual liquid remaining.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram illustrating the coating method and apparatus of the present invention. FIG. 2 is a plan view and a cross-sectional view of a configuration example of a jetting array according to the present invention. DESCRIPTION OF SYMBOLS 1... Application head, 2... Ejection pipe array, 21... Air ejection pipe, 2ij
... Air blowout hole, glass substrate row, 31. Paint, 41.. Resin layer, - Conveyance drive device, - Sorting and supplying means, ... Drying and carrying out means.

Claims (4)

[Claims] (1) A row of rectangular glass substrates whose equilateral sides are tightly bonded, floated by air pressure, and arranged and held on the same plane. A conveying force is applied to the last substrate, and the glass substrates are continuously conveyed horizontally. A coating method characterized by applying an oil-based resin solution to. (2) The horizontal continuous coating device for applying the oil-based resin solution onto a glass substrate is characterized in that it is equipped with at least a coating head and a conveying device provided with a plurality of rows of air jet holes parallel to the conveying direction. Coating device. (3) Air jetting from air jetting holes at passage points of the substrate bonding portion of the glass substrate row to be floated and conveyed is sequentially stopped at a time point corresponding to passage of the bonding portion, and resumed after passing the substrate bonding portion. The coating device described in . (4) The coating apparatus according to claim 2 or 3, wherein the supply and bonding of the glass substrates to the row of glass substrates that are floated and conveyed are controlled without impact.