JPS582246A - Spacer for laminating glass plate and its formation - Google Patents

Abstract

PURPOSE:To easily form firmly adhered and easily handleable spacers for laminating glass plates by dropping a photosetting resin contg. a combustion improver, a thickener or an adhesion enhancer onto the surface of a glass plate and by setting the resin under irradiated light. CONSTITUTION:A tank 3 provided with an orifice 4 is attached to a holder 2 installed over a conveying line, and it is filled with a photosetting resin contg. one or more among a combustion improver, a thickener and an adhesion enhancer. When a photoelectric switch 6 detects a glass plate 5 being conveyed on rolls 1, in accordance with the signal the orifice 4 works to drop the photosetting resin onto the plate 5 at regular intervals. When the switch 6 stops detecting the plate 5, the dropping is stopped. The plate 5 is passed under a high voltage mercury lamp 7 to set the resin under irradiated light. Thus, a spacers stuck to a surface of the glass plate 5 are formed.

Description

[Detailed Description of the Invention] ゛ The present invention provides a method for stacking a plurality of glass plates on a mounting table such as a T-9 tray. When the spacer is connected to the adjacent glass plate t's, the spacer also forms a noise.

Conventionally, as a spacer to prevent contact between multiple glass plates stacked one on top of the other, gold paper, organic limmer grains, or interlayer materials made of molded plastic, rubber, etc. have been widely used. used, and some wax t
's spacers are used to make them look like spots.

However, the spacing effect of the interleaving paper is not sufficient, and chips may sometimes cause scratches on the glass plate surface, and insertion and removal of the backing paper is complicated. Furthermore, it is necessary to prepare interleaf sheets of various sizes to correspond to glass plates of various sizes, but this is also not a good idea.

``Organic'' 4-limer grains are fine if the particle size is not large (-
On the other hand, the effect as a sir is not enough.

If the particle size is large, the adhesion to the glass plate is weak and the particles may fall onto the threshold where they are stacked. Furthermore, since organic foamer grains are easily blown away,
There is a possibility that it will worsen.

The separating layer structure made of plastic, rubber, etc. has, for example, a mouth-like cross-sectional shape, and a gas plate 5 and an IC are fitted in every other layer. Although the space-tight binding has the best effect, it has the disadvantage that the fitting work is complicated and the storage space for the H-layered glass plates is large. Furthermore, there is a problem in that the S-corner molded body made of plastic or the like has a decorative element printed on the peripheral edge and cannot be applied to a glass plate immediately after the corner.

Mayu, Tokukai Sho 52-2F! Publication No. 367 and Publication No. 109
In order to eliminate the above-mentioned drawbacks, Japanese Patent No. 516 reports a method in which a spacer is formed by depositing wax on a glass plate. However, if this method is applied to so-called printed protective glass, in which many heating lines are printed on the surface of the glass sheet, the wax will soften and flow during the second heating process of bending and strengthening the glass sheet. There is an inconvenience that combustion occurs in one heated section. heating! Qin printed a mixture of low-melting point glass and silver particles on a glass plate, and then printed it on a glass plate.
It is formed by sintering in the above heating process, so
When the wax burns on the heating wire, the % sintering degree becomes higher than the desired temperature, and as a result, the desired resistance of heating l1IIIk cannot be obtained and -proofing property 11! In addition to lowering Y, softening of the low melting point glass frit and poor flow may cause design defects.

In view of the above drawbacks, the present invention utilizes a photocurable resin to which at least one of a combustion improver, a thickener, and an adhesion improver is added as a spacer for a glass plate.

That is, l of the present invention is a glass plate laminate consisting of a cured product of a photocurable resin to which at least one of a combustion improver, a thickener, and an adhesion improver is added, which is deposited in spots on the glass plate surface. It is a spacer for

Another feature is that a photocurable resin t to which at least one of a combustion improver, a thickener, and an adhesion improver is added is dropped onto the surface of a glass plate and then cured by light irradiation. This is a method of forming a spacer for laminating glass plates.

Photocurable resin can be cured quickly, so the height and shape of the spacer can be made uniform.

Because it is not cured by heat, the additives contained in the resin do not disappear and can be easily cured.

Since the cured product burns within the heating range during bending or strengthening of glass plates without causing any particles to flow, it is ideal as a spacing agent for glass plates.

However, when bending a glass plate in a short period of time, if a spacer with an R-shaped bottom is used only with photocurable resin, the burning rate of the resin is slow, making it difficult to completely burn it during bending, resulting in residual resin. There is a delay in causing damage to the translucency of the glass plate. Adding a combustion improver χ to the photocurable resin can improve the combustibility of the resin, and no resin residue remains after the heating process.

In addition, in the case of a glass plate whose surface is partially convex due to printing of anti-slip lines on the surface of the glass plate, if the spacer is formed using only one-component curing resin, the height of the spacer will be insufficient. However, it may be difficult to completely separate the glass plates.

When a thickener is added to the photocurable resin, the height of the spacer increases, and the glass plates can be reliably separated even in the above case.

When transporting t7t1 glass plates by leaning them parallel to each other on a pallet, etc. If the spacer is formed using only one-component hardening resin, the spacer may peel off from the glass plate depending on the transportation distance and vibrations during transportation, causing the glass plate to become damaged. If they come into contact with each other, scratches will occur on the glass plate, and the spacer will no longer function as a spacer.

When an adhesion improver is added to the photocurable resin 11, the adhesion between the glass plate and the spacer can be strengthened, and the spacer will not peel off even under the above conditions.

In accordance with the above-mentioned conditions, the present invention is directed to adding one kind of a combustion improver, a thickener, and an adhesion improver to a photocurable resin as additives, or two or all three kinds of additives. It is a good addition when used in combination with

Examples of the photocurable resin used in the present invention include, but are not limited to, polyether acrylate, I-lyester urethane acrylate, I-lyester acrylate, and epoxy acrylate, and commonly used photocurable resins. Either can be used. Friend, the viscosity of the photocurable resin is 2,000 to 50.
000 c, p, and easy are suitable.

Any combustible substance that is a liquid at room temperature can be used as the combustion aid, and specific examples thereof include methanol, ethanol, toluene, xylene, turpentine oil, turpine oil, and pine oil.

As the thickener, combustible powders such as methylcellulose, ethylcellulose, and starch are preferred. A high viscosity liquid V may be added as a thickener, but this is not preferable because dropping the photocurable resin becomes difficult.

Also, W! Examples of adhesion improvers include polyhydric alcohols such as glycerin, ethylene glycol, and propylene glycol, alkyd resins, polyvinyl acetate ST fats, polyvinyl alcohol, and polyurethane resins.
If the rowing force is strong, both A and A can be used.

The appropriate amounts of these additives are generally 10 to 50 parts by weight of the fi hard-curing resin, 20 to 80 parts by weight of the thickener, and 10 to 60 parts by weight of the adhesive agent. If the amount is less than , the effect of each additive will not be fully exhibited, and if the amount exceeds these ranges, curing of the photocurable resin will be inhibited, which is not preferable.

According to the present invention, a spacer is formed by dropping a photocurable resin containing the above-mentioned additive onto the surface of a glass plate and then curing the dropped resin by irradiation with light. It is practical to form spacers by intermittently dropping resin onto the surface of a glass plate that is continuously transported.

Hereinafter, a specific example of the implementation of the present invention will be described with reference to II and the accompanying drawings KrFi.

In the multi-roll Ig installation, a pedestal 2 is installed on the conveyor line, and the pedestal 2 contains a photocurable resin containing at least one additive selected from combustion improvers, thickeners, and adhesion improvers. A filled tank 3 is provided. The tank 3 is provided with an orifice 4 equipped with a large number of electromagnetic valves in the width direction of the roll l. Also, the transport direction of the gantry 2 (indicated by an arrow in the figure) I! Charging switch 6 on the tI side
is provided, and this charging switch releases the glass plate 5.
The solenoid valve of the orifice 4 is actuated by sensing the arrival of . A high-pressure water pot light 7 is provided behind the orifice 4 in the conveyance direction, and the photocurable resin is cured by irradiation with this light. Further, the tank 3 is provided with a temperature control device (1g not shown) to keep the temperature IItv of the photocurable resin constant.

When the glass plate 5 is transported over the roll, the photoelectric switch 6 detects the number of glass plates.

The sensing signal activates the orifice 41 to start dropping the photocurable resin. After that.

Resin is dripped at predetermined intervals.

11 that the photoelectric switch 6 no longer senses the glass plate BY.
The dripping is stopped. Then, the resin is dropped and passes under the high-pressure mercury lamp 7 on the glass plate 5I, and the resin is cured by this light irradiation to form a spacer layered on the glass plate surface. The glass plates are then taken out from the conveyance line and stacked one after another on a mounting table such as a pallet. In addition.

Dropping of the photocurable resin may be performed while moving the glass plate 5Y, or may be performed by stopping the glass plate 5 from time to time at the dropping position.

The number of drops of photocurable resin may be up to 10ag + square,
A higher number of drops is not necessary.

Examples of the present invention will be shown below.

Example 1 Urethane polyester acrylate h as oligomer
8 7. 5 wt, tetraethylene glycol diacrylate h l 0 as a photocuring agent. O wtl and acetophenone derivative ♀ as initiator. A mixed solution (composition for forming a spacer) was obtained by adding and mixing 20 parts by weight of ethanol as a combustion improver to 100 parts by weight of a photocurable resin consisting of 5 VTL.◎While keeping this mixed solution at 20°C, the mixture was heated on a glass sheet. The number of drops is 1 piece/303 square, and then the glass sheet is irradiated with ultraviolet rays Y to harden and spacer Y is formed. Next spacer (
The shape of the cured photocurable resin was approximately circular with a diameter of approximately 6 sm+, and its height was approximately 1.5 mm. This spacer was sufficiently cured even after irradiation with ultraviolet rays, and both the ease of handling and the spacer effect fully met KIN's requirements.

This glass sheet was carried into a heating furnace and heated to 750°C over 2 minutes and 10 seconds. In this heating process, no softening and flow of the spacer on the glass sheet surface was observed, and the
On the glass sheet taken out from the 7JI thermal furnace, no remaining A was observed on the glass surface, and the heating wire LIkK provided on the glass surface was also abnormal. It wasn't noticed.

Example 2 Stingray diacrylate 86 as oligo i-, s w
To 100 parts by weight of a photocurable resin consisting of neopenkel glycol diacrylate 116 wtf4 as a photocuring agent and penzophenol VT as an initiator, 30 parts by weight of turpentine oil as a combustion improver was added and mixed. I got liquid.

This mixed solution was dropped onto a glass sheet at a temperature of 1 drop/30 cm square while maintaining the temperature at 20°C, and was then cured by UV irradiation to form a spacer. The residence time in the area is approximately 2 seconds, and the shape of the formed spacer is 5-5 mm in diameter.
It is almost circular in shape, and its height is approximately g■. This spacer was sufficiently cured even under direct UV irradiation Wk, and fully satisfied the requirements for both ease of handling and spacer effect.

The glass was transported into the heating furnace and heated to 700°C over 3 minutes.
Heated to ℃. In this heating step, the spacer on the glass sheet surface is softened at RT.

II! Also, there was no residue left on the glass sheet after taking it out of the heating furnace. The spacer resin was completely burned without being noticed, and there was no contamination of the glass surface due to burning resin! No abnormality was detected in the heating striations placed on the glass rkJ.

Example 3 "?: 15 for 100 parts by weight of the photocurable resin of Example 2"
A composition for forming a spacer by adding and mixing 20 parts by weight of methyl cellulose with 0 mesh pass. The viscosity of the photocurable resin before addition was 2.000 e, p, l, but the viscosity after addition was within 3.000 o, p, mK. The height of the spacer is approximately 3.0 mm, its diameter is 5 mm and 6 mm, and this spacer is sufficiently hardened.
There were no problems with handling, etc.

In the same manner as above except that 150 mesh of ethyl cellulose was used instead of methyl cellulose, a viscosity of 3,500
A, p, - spacer type compositions were obtained. When I installed an R-shaped spacer on the same machine as above, the height of the spacer was 4■#*.

Form the above two spacers and t glass 4 [Y700℃
When placed in a heating furnace, both were completely combusted in about 5 to 6 minutes, leaving no residue.

Example 4 20 parts by weight of polyvinyl alcohol were added to and mixed with 100 parts by weight of the photocurable resins of Examples 1 and 2, and the mixture was cured under pressure above a glass plate under the same conditions as in Example 1. The shape of the spacer after curing is approximately 5 to 6 wagB and the height is approximately 2.0 cm. This spacer did not peel off from the glass plate at all during loading onto Kyowa's /#lets, transporting the /#lets, and taking it out from the pallet, and the spacer formed a 100-layer adhesive layer.

The above polyvinyl alcohol zo ]1tifllV
A similar effect was obtained by adding 15 parts BmVm of alkyd resin instead of c.

Example 5 100 parts by weight of the photocurable resin of Example 1 was mixed with 20 parts by weight of ethanol as a combustion improver and 20 parts by weight of 150 mesh methyl cellulose as a thickener.
It was dropped under the same conditions as ill, cured, and then the actual l/
The effect of the sum of the results obtained in 1Afi11 and Example 3 was obtained.

In other words, the height of the spacer is as high as approximately 4 cm, and the combustion speed is 6.9 times faster, with complete combustion occurring in 2 minutes and 10 seconds at 700°C.

Implementation fI16 Instead of the thickener in Example 5, 20 parts by weight of polyvinyl alcohol was added and mixed as an adhesion improver, and spacer Vf was added.
However, the effect of the sum of Examples 1 and 4 was obtained.

Polyvinyl alcohol 20 instead of the combustion improver in Mei M Gaff Example 5
A spacer was created by mixing 2X + weight parts, and although the burning speed was slower than that of the actual MFL15, the height of the spacer was the same as that of the actual MFL15, and the height of the spacer was the same as that of Example 4. One having χ was obtained.

Example 8 To 100 parts by weight of the photocurable resin of Example Fl, 15 parts by weight of ethanol as a combustion improver, 110 parts by weight of methyl cellulose as a thickener, and 15 parts by weight SV of alkali resin as an adhesion improver were added and mixed. Dropped and cured under the same conditions as in Example 1.

The obtained spacer had a height of 3 mm, a residual adhesion rate of about 909 G after handling and transportation, a burning time of about 3 minutes in a heating furnace at 750°C, and no residual amount of resin. Ta.

Comparative Example Example 1O original curable resin was dropped onto a glass plate under the conditions of Example 10 and cured.Then, the spacer at this time had a height of about 1.5 cm, and had no adhesive properties after being bonded or transported. The survival rate is approximately 4096 or less.

The combustion time was approximately 6 minutes in a heating furnace at 700°C, which was significantly inferior to each of the examples described above.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory section showing an eleventh embodiment of the present invention. l...a-le 2...frame 3...tank 4...orice 5...
Glass plate 6... Charging switch 7... High pressure mercury lamp patent applicant Central Glass Co., Ltd.

Claims (1)

[Claims] 1. From a cured product of a photocurable resin to which at least one of a flame enhancer, a thickener, and an adhesion improver are added in spots on the surface of a glass plate. A spacer for laminating glass plates. 2. A photocurable resin to which at least one of a combustion improver, a thickener, and an adhesion improver is added is dropped onto the surface of a glass plate and then cured by light irradiation. A method for forming a spacer for laminating glass plates into a 4I image.