WO2014098162A1

WO2014098162A1 - Paper slip sheet for glass and glass sheet package

Info

Publication number: WO2014098162A1
Application number: PCT/JP2013/083992
Authority: WO
Inventors: 布施　裕児
Original assignee: 旭硝子株式会社
Priority date: 2012-12-21
Filing date: 2013-12-18
Publication date: 2014-06-26
Also published as: TW201429905A; KR20150096374A; JPWO2014098162A1; TWI535675B; CN104812959A

Abstract

A paper slip sheet for glass is provided. This paper slip sheet is to be used in stacking glass sheets, and can inhibit the occurrence of defects, the cause of which is foreign matter transferred from a slip sheet, in wiring formed on a glass sheet or the like. A paper slip sheet which is to be interposed among multiple glass sheets in stacking the glass sheets, wherein the content of a silicon-bearing organic compound (organopolysiloxane) is 3ppm or lower.

Description

Glass interleaving paper and glass plate packaging

The present invention relates to glass interleaving paper and a glass plate package using the glass interleaving paper.

FPD (Flat Panel Display) glass plates such as architectural glass plates, automotive glass plates, plasma display glass plates, and liquid crystal display glass plates have wrinkles on the surface during storage and transportation. Product defects are likely to occur due to contamination with foreign substances.
In particular, FPD glass plates (glass substrates) have fine electrical wiring (hereinafter also referred to as wiring), electrodes, electrical circuits, partition walls, and other elements formed on the surface, so that there are slight wrinkles and contamination on the surface. Even if it exists, it causes a defect such as disconnection. Therefore, high surface cleanliness is required for glass plates used in these applications.

Generally, glass plates are stored and transported in a state of being stacked on a packing pallet or the like. In this case, wrinkles on the surface of the glass plate are often generated by rubbing between adjacent glass plates.

Further, contamination of the surface of the glass plate often occurs when contaminants such as organic substances in the storage atmosphere or the transport atmosphere adhere to the surface of the glass plate.
It is difficult to remove this contaminant from the surface of the glass plate only by washing with water. Therefore, the removal of the contaminants needs to be performed using, for example, acid or alkali. However, such cleaning deteriorates the working environment at the time of cleaning, and increases the cost of cleaning and waste liquid treatment. Moreover, even if such cleaning is performed, it is difficult to completely remove the contaminants from the surface of the glass plate.

As a method for preventing such wrinkles and contamination on the surface of the glass plate, a method in which a so-called glass interleaving paper is interposed between paper sheets to be laminated and the surfaces of adjacent glass plates are separated from each other has been conventionally used. Has been.

However, in the method in which the glass interleaving paper is interposed between the glass plates, the glass interleaving paper and the surface of the glass plate are in direct contact. For this reason, various components such as resin present on the surface of the glass interleaving paper are transferred to the surface of the glass plate and contaminate the surface of the glass plate. Problems).

As a method for solving such a problem, for example, Patent Document 1 discloses glass interleaving paper containing 0.1% by weight or more of sodium tripolyphosphate.
Patent Document 2 discloses glass interleaving paper containing 50 mg / m ² or more of sodium tetraborate.
Furthermore, Patent Document 3 discloses a glass plate package in which a glass plate is packed using glass interleaving paper having a higher saturated fatty acid content of 0.08% by mass or less.

Japanese Unexamined Patent Publication No. 6-316432 Japanese Unexamined Patent Publication No. 7-101483 International Publication No. 2011/118502

According to these glass interleaving papers, components contained in the glass interleaving paper can be reduced from being transferred to the surface of the glass plate, and transfer stains on the surface of the glass plate can be suppressed.
However, these glass interleaving papers are fine due to transfer stains from the glass interleaving paper when used for laminating glass plates such as FPD glass plates, on which elements such as wiring and electrodes are formed on the surface. It is difficult to sufficiently suppress the occurrence of defects such as simple wiring, electrodes, and electric circuits.

An object of the present invention is to solve the problems of the prior art described above, such as wiring caused by contamination due to transfer from glass interleaving paper when elements such as wiring and electrodes are formed on the surface of a glass plate. An object of the present invention is to provide a glass slip sheet capable of greatly suppressing the occurrence of defects and a glass plate package using the glass slip sheet.

In order to achieve the above object, the glass interleaving paper of the present invention is a glass interleaving paper interposed between glass plates when laminating a plurality of glass plates, and is an organic compound having silicon elements (atoms) ( The glass interleaving paper is characterized by having a content of 3 ppm or less.
In the glass interleaving paper of the present invention, the organic compound contained is exemplified by silicone (organopolysiloxane).
The raw material for the glass interleaving paper is preferably a pulp having a silicone content of 10 ppm or less. The raw material for the glass interleaving paper is preferably at least one selected from the group consisting of chemical pulp, semi-chemical pulp, mechanical pulp, non-wood fiber pulp, and synthetic pulp.
Moreover, it is preferable that the raw material of glass interleaving paper is virgin pulp.
Further, the thickness of the glass interleaving paper is preferably 0.05 to 0.10 mm.

The method for producing glass interleaving paper of the present invention includes a step of washing pulp as a raw material of glass interleaving paper with an organic solvent, a step of showering glass interleaving paper with an organic solvent before and / or after drying, and It is preferable to have a step of dissolving and removing at least one organic compound having silicon element adhering to pulp or paper, selected from the group consisting of a step of passing glass interleaving paper into a water tank filled with an organic solvent. .
The organic solvent is preferably an organic solvent capable of dissolving an organic compound containing silicon element, or a solvent obtained by diluting the organic solvent.
The organic solvent is preferably a hydrocarbon organic solvent.

Furthermore, the present invention provides a glass plate package formed by laminating a plurality of glass plates with the glass interleaving paper of the present invention interposed therebetween.

In such a glass plate package of the present invention, the glass plate is preferably a glass plate for a flat panel display.

According to the glass interleaving paper of the present invention, when fine wiring or electrodes are formed on the surface of the laminated glass plate with the glass interleaving interposed therebetween, the silicon intercalation containing silicon atoms transferred from the glass interleaving paper is contained. Defects caused by the organic compound to be reduced can be greatly suppressed. Therefore, by using the glass interleaving paper of the present invention, the yield can be improved and the production cost of FPD or the like can be reduced.

It is a figure which shows notionally a part of example of the manufacturing apparatus of glass interleaving paper. It is a figure which shows notionally a part of example of the manufacturing apparatus of glass interleaving paper. It is a figure which shows notionally an example of the glass plate package of this invention.

Hereinafter, the glass interleaving paper and the glass plate package of the present invention will be described in detail with reference to the accompanying drawings.

As described above, the glass plate is used for storage, transportation, and the like in a state of a glass plate package (glass laminate) in which a plurality of glass plates are laminated with glass interleaving paper interposed therebetween.
The glass interleaving paper of the present invention is a glass interleaving paper used for laminating such glass plates, and can be used for laminating various glass plates. In particular, it is preferably used for laminating glass plates on the surface of which elements such as wiring, electrodes, electric circuits, and partition walls are formed. In particular, glass plates (glass substrates) for FPD such as plasma displays and liquid crystal displays are used. When laminating, it is preferably a glass interleaving paper interposed between glass plates.

The glass interleaving paper of the present invention is a glass interleaving paper in which the content of the organic compound having a silicon atom (ratio of the mass of the organic compound having a silicon atom to the mass of the glass interleaving paper) is 3 ppm or less.
The glass interleaving paper of the present invention has such a configuration, so that elements such as wiring, electrodes, electric circuits, and partition walls are formed on the surface of an FPD glass plate laminated using the glass interleaving paper. Defects and the like that occur in the wiring and electrodes can be greatly reduced.

As described above, various proposals have conventionally been made regarding the suppression of transfer stains from glass slip sheets to glass plates.
However, according to the study by the present inventors, a glass plate in which elements such as wiring and electrodes are formed on the surface, such as an FPD glass plate, suppresses transfer contamination from the glass interleaf to the glass plate. However, when a wiring, an electrode, or the like is formed on the surface, defects in the wiring or the like occur with a probability that is not low.

The present inventors have made extensive studies on this cause. As a result, it was found that the organic compound having silicon atoms transferred from the glass interleaving paper to the glass plate is a major cause of defects such as wiring.

As is well known, in the production of paper pulp, which is the raw material for glass interleaving paper, in various processes such as the cooking process and bleaching process in the production of chemical pulp, and the deinking process in the production of waste paper pulp, cooking aids and scales are used. Various agents such as an inhibitor, a deinking agent, an antifoaming agent, a surfactant, and a bleaching agent are used as necessary. Also, in the process of making glass interleaving paper (paper making process), various materials such as cleaning agents, emulsifiers and dispersants as additives for cleaning, etc. are used for cleaning members that come into contact with glass interleaving paper (wet paper / paper) Drugs are used as needed. Some of these drugs contain organosilicon compounds.
Usually, these chemicals used in the manufacturing process of pulp and glass interleaving paper are removed by washing. However, since many organic silicon compounds have a certain degree of viscosity, it is difficult to completely remove them, and they remain in the produced glass interleaving paper.
Therefore, when the glass plate is laminated with the glass interleaving paper interposed therebetween, the organosilicon compound remaining on the glass interleaving paper is transferred to the glass plate and becomes a foreign object.

On the other hand, in recent years, the FPD has a high spatial resolution, and as a result, the wiring and electrodes formed on the glass plate have become finer. For example, in the case of wiring, it is required to form wiring having a width of about 3 to 5 μm at intervals (pitch) of about 50 to 200 μm.

However, according to the study by the present inventors, when forming such a fine wiring or the like, a metal thin film (metal compound) that becomes a wiring even if a slight organosilicon compound exists on the surface of the glass plate. Film) and patterning by etching.
Further, in the liquid crystal display, even if a slight amount of an organosilicon compound is present on the surface of the glass plate, unevenness occurs in the black matrix of the color filter.
Therefore, when the organosilicon compound moves from the glass interleaving paper to the glass plate by transfer or the like, the transferred organosilicon compound becomes a foreign substance, and when an element such as a wiring or an electrode, a color filter or the like is formed on the glass plate This is a major cause of defects.
There are various types of the above-mentioned organosilicon compounds. Among them, silicone (polysiloxane (organopolysiloxane) that may have an organic functional group) often contained in an antifoaming agent is transferred to a glass plate. Wiring and electrode defects are likely to occur, especially when polydimethylsiloxane or the like is transferred to a glass plate among silicones.
In the paper making process, it is possible to reduce the amount of silicone contained in the glass interleaving paper, but it is of course preferable that there is little residue such as an antifoaming agent at the pulp stage. The silicone content of the pulp is preferably 10 ppm or less, more preferably 5 ppm or less, further preferably 3 ppm or less, and particularly preferably 1 ppm or less.

As a result of further investigations, the inventors have determined that the content of the organosilicon compound in the glass interleaving paper is 3 ppm or less, resulting in poor wiring due to the organosilicon compound transferred from the glass interleaving paper to the glass plate. It has been found that the occurrence of the above can be greatly reduced.
In other words, by using the glass interleaving paper of the present invention, the surface of the glass plate can be made fine without performing high-level cleaning or the like for removing foreign substances composed of organosilicon compounds on the surface of the glass plate for FPD. When forming elements such as wiring, electrodes, electrical circuits, partition walls, black matrix of color filters, etc., defective elements such as wiring such as disconnection due to organosilicon compounds, and occurrence of black matrix unevenness, It can be greatly suppressed. Therefore, by using the glass interleaving paper of the present invention, the production cost of FPD or the like can be reduced and the yield can be improved.

As described above, the glass interleaving paper of the present invention is a glass interleaving paper having an organosilicon compound content of 3 ppm or less.
If the content of the organosilicon compound exceeds 3 ppm, the transfer of the organosilicon compound from the glass interleaving paper to the glass plate cannot be sufficiently suppressed, and the wiring resulting from the organosilicon compound transferred from the glass interleaving paper to the glass plate The effect of reducing the occurrence of defects cannot be sufficiently obtained.

In the glass interleaving paper of the present invention, the content of the organosilicon compound is preferably 2 ppm or less, more preferably 1 ppm or less, and particularly preferably 0.5 ppm or less.
Defects that occur when wiring, electrodes, etc. are formed on the surface of a glass plate for FPD using the glass interleaving paper of the present invention by setting the content of the organosilicon compound in the glass interleaving paper to the above range. Can be more suitably suppressed.

In addition, in the glass interleaving paper of this invention, the content of an organosilicon compound is so preferable that it is small. That is, in the glass interleaving paper of the present invention, there is no limitation on the lower limit of the content of the organosilicon compound.
However, it is difficult to completely remove the organosilicon compound from the glass interleaving paper, and the glass interleaving paper having an extremely small content of the organosilicon compound is time-consuming and expensive to manufacture. Considering this point, in the glass interleaving paper of the present invention, the content of the organosilicon compound is preferably 0.05 ppm or more.

The glass interleaving paper of the present invention is basically a known glass interleaving paper used for laminating glass plates, except that the organosilicon compound content is 3 ppm or less.

Accordingly, the glass interleaving paper of the present invention includes chemical pulps such as kraft pulp (KP), sulfite pulp (SP), soda pulp (AP), semi-chemical pulp (SCP), semi-chemical pulp such as Chemi-Grandwood pulp (CGP), etc. Chemical pulps; mechanical pulps such as groundwood pulp (GP), thermomechanical pulp (TMP, BCTMP), refiner grandwood pulp (RGP); non-wood fiber pulp made from straw, sanjo, hemp, kenaf, etc .; synthetic pulp; Any known glass interleaf made of various raw materials can be used. Furthermore, the glass interleaving paper of the present invention may be a mixture of these materials, or may be a material containing cellulose or the like.
These raw materials may be used paper, virgin pulp, or a mixture of used paper and virgin pulp. Among these, virgin pulp is preferable.

Here, in the glass interleaving paper of the present invention, any pulp is a silicone-based antifoaming agent (containing silicone), which causes a major cause of defective wiring and electrodes when transferred to a glass plate. It is preferable to use as a raw material a pulp produced without using an antifoaming agent.
Especially, the pulp manufactured without using the antifoamer containing polydimethylsiloxane is used especially suitably as a raw material of the glass interleaving paper of this invention.

The glass interleaving paper of the present invention can basically be produced using a known glass interleaving papermaking method.
As a suitable example, in the paper making process of glass interleaving paper, before preparing the paper raw material liquid, a manufacturing method for cleaning pulp as a raw material, and manufacturing for performing shower cleaning at least before and during the drying process A method is illustrated.

FIG. 1 and FIG. 2 conceptually show an example of a glass slip paper manufacturing apparatus (glass slip paper making apparatus) used in the present invention.
As shown in FIG. 1, a paper raw material liquid (liquid obtained by diluting pulp with water) is supplied in a sheet form from a head box 12 onto a lower wire 16 installed in a wire part 14. The paper raw material liquid supplied to the lower wire 16 is then sandwiched between the lower wire 16 and the upper wire 18 so that the paper raw material liquid is spread to a uniform thickness and dehydrated to become wet paper (paper).

The lower wire 16 and the upper wire 18 of the wire part 14 are permeable membranes formed in an endless belt shape. Specifically, it is an endless belt made of a net made of plastic or metal material, or made of felt made of natural fiber or synthetic fiber.
The lower wire 16 and the upper wire 18 are wound around a plurality of rollers, and are rotated at a predetermined speed by transmitting the driving force of a motor (not shown) to the driving rollers in the plurality of rollers. Yes.

The wet paper formed by the wire part 14 is conveyed to a press part 20 having a press roller, an endless belt-like felt, a press roller pair, etc., where further dewatering and pressing are performed simultaneously.
The wet paper that has passed through the press part 20 is conveyed to a dryer part 24 composed of a plurality of rollers, and is dried in an atmosphere of, for example, about 120 ° C. while passing through the dryer part 24.

The paper dried by the dryer part 24 is conveyed to the calendar part 26, and is subjected to a calendar process by nipping and conveying by a calendar roll, so that the front and back surfaces are smoothed. If necessary, a coater part may be provided between the dryer part 24 and the calendar part 26, and a paint or the like may be applied to the smoothed paper surface.
The paper that has been subjected to the calendar process in the calendar part 26 is wound around a reel 28 as a glass interleaving paper and is rolled (hereinafter referred to as a jumbo roll 30).

The glass interleaving paper may usually be shipped as it is with the jumbo roll 30. However, for example, the glass interleaving paper is usually cut into a width corresponding to the product, wound up, and has a predetermined length of about 8000 to 10,000 m. Shipped as a roll 32 around which a long glass interleaf is wound. In other words, the glass slip sheet is usually shipped in small portions from the jumbo roll 30.
Specifically, as conceptually shown in FIG. 2, the glass slip sheet is fed from the jumbo roll 30, cut to a predetermined width (cut in the longitudinal direction) by the cutter 34, and wound by the winder 36. When the glass slip sheet fed from the jumbo roll 30 reaches a predetermined length, it is cut into a predetermined length (cut in the width direction) by the cutter 34, and a long glass slip sheet having a predetermined width is obtained. The rolled roll 32 is shipped to a user such as a glass manufacturer.

The long glass interleaving paper wound around the roll 32 is cut into a cut sheet shape (rectangular shape) of a size according to the glass plate to be laminated at the shipping destination and interposed between the laminated glass plates.
In addition, you may perform the cutting | disconnection to this cut sheet by the manufacturer of glass interleaving paper.

As a method for producing the glass interleaving paper of the present invention, in such an apparatus for producing glass interleaving paper (paper making process), before preparing the paper raw material liquid to be supplied to the head box 12, there is a method of washing the pulp that is the raw material. Illustrated.
According to the study by the present inventors, it is considered that the organosilicon compound transferred from the glass interleaving paper to the glass plate is mostly due to impurities adhering to the raw pulp. Therefore, by adding the pulp as a raw material into the solvent, stirring, leaving, etc., the organosilicon compound adhering to the pulp is dissolved with the solvent, and then filtered to remove the pulp with the solvent. Wash.
Thus, using the pulp washed with the solvent, a paper raw material liquid is prepared and supplied to the head box 12 to produce a glass interleaving paper. Thereby, the glass interleaving paper of this invention whose organosilicon compound is 3 ppm or less can be manufactured.

As the solvent used for washing, an organic solvent or the like that can dissolve the organosilicon compound that is considered to be attached to the pulp may be appropriately selected.
As an example, aromatic hydrocarbon solvents (toluene, xylene, etc.) are exemplified. In addition, you may dilute and use a solvent with alcohol, such as ethanol, as needed. The dilution with alcohol or the like is preferably 20 to 80 times, more preferably 40 to 60 times by volume.

In addition, pulp washing conditions such as stirring speed and time, pulp immersion time in the solvent, amount of solvent relative to the amount of pulp, solvent temperature, paper thickness, paper type (raw materials, etc.), organic What is necessary is just to set suitably the conditions which can make the organosilicon compound which a glass interleaving paper contains to 3 ppm or less according to the dissolving power of the solvent with respect to a silicon compound.
Moreover, you may perform such washing | cleaning of a pulp in multiple times.

As another method for producing the glass interleaving paper of the present invention, in such an apparatus for producing glass interleaving paper, the paper is shower-washed before the dryer part 24 and / or at least one of the dryer parts 24. A method is illustrated.
That is, a shower is provided in front of the dryer part 24 (between the press part 20 and the dryer part 24) and at least one of the dryer parts 24, and adheres to the paper at least before and during drying. Wash with a solvent that can dissolve the organosilicon compound that is considered to be present. Thereby, the foreign substance of the organosilicon compound contained in paper is dissolved and removed, and the glass interleaving paper of the present invention in which the organosilicon compound is 3 ppm or less can be produced.
Note that a plurality of cleaning showers may be provided in front of the dryer part 24 or in the dryer part 24 in the paper transport direction.

The solvent used for the shower cleaning may be appropriately selected from an organic solvent that can dissolve the organosilicon compound that is considered to be attached to the paper, as in the case of the previous pulp cleaning. As an example, the solvent similar to the thing illustrated by washing | cleaning of a pulp previously is illustrated. Similarly to the above, the solvent may be diluted with ethanol or the like as necessary. The dilution with ethanol or the like is preferably 20 to 80 times, more preferably 40 to 60 times by volume.
The conditions for paper shower cleaning, such as the amount of solvent used for shower cleaning and the solvent injection speed, are the paper thickness, paper transport speed and transport path, paper type (raw materials, etc.), and the solvent for the organosilicon compound. The conditions under which the organic silicon compound contained in the glass interleaf can be reduced to 3 ppm or less may be appropriately set according to the dissolving power of the glass.

Further, as another method for producing the glass interleaving paper of the present invention, a water tank filled with a solvent capable of dissolving an organosilicon compound considered to be attached to the paper is provided in front of the dryer part 24 or in the dryer part 24. It is also possible to use a method of dissolving and removing the foreign substance of the organosilicon compound contained in the paper by passing the paper through here.

Such pulp washing, paper shower washing, and washing using a water tank may be performed in two or more to produce the glass interleaving paper of the present invention.
Further, if necessary, the pulp or paper may be washed with clean water such as pure water after washing the pulp or paper using a solvent.

The glass plate package of the present invention is a glass plate package (glass plate laminate) formed by laminating a plurality of glass plates with the glass interleaving paper of the present invention interposed therebetween.

In FIG. 3, an example of the glass plate package of this invention is shown notionally. In addition, FIG. 3 is the figure (side view) which looked at the glass plate package from the surface direction of glass.
A glass plate package 50 shown in FIG. 3 is formed by laminating a plurality of glass plates G on a pallet 52. The pallet 52 is a known pallet for packing glass plates. The pallet 52 includes a base 54, an inclined base 56 erected on the upper surface of the base 54, and a mounting base 58 placed on the upper surface of the base 54. Have.
One surface of the tilting table 56 in the horizontal direction (contact surface with the glass plate G = back surface) is tilted with respect to the vertical direction (hereinafter also referred to as a tilted surface). The angle of the inclined surface may be an angle at which the laminated glass plates G can be stably stacked, stored and transported, and is usually 85 ° or less with respect to the horizontal direction, for example, 85 ° to 70 °. preferable.
Further, the upper surface of the mounting table 58 is inclined so as to descend toward the inclined table 56 with respect to the horizontal direction. In the illustrated example, as an example, the upper surface of the mounting table 58 is configured to be 90 ° with respect to the inclined surface of the inclined table 56.

In the pallet 52, the glass plate G is placed on the upper surface of the mounting table 58 and stacked in a state of leaning on the inclined surface of the inclined table 56.
Further, the above-described glass interleaving paper 60 of the present invention is interposed between the glass plates G. The glass interleaf paper 60 is larger than the glass plate G, and is interposed between the glass plates G so as to cover the entire surface of the glass plate G.
In addition, the glass interleaving paper 60 of the present invention may be similarly interposed between the laminated glass plates G and the inclined table 56, and the surface of the foremost glass plate G is similarly used in the present invention. You may cover with the glass interleaving paper 60.

As described above, the glass plate package 50 of the present invention is formed. In this case, if necessary, a contact plate may be brought into contact with the foremost glass plate G (glass interleaving paper), and a belt-like body may be stretched over and fixed to the inclined table 56. A cover may be hung so as to cover the plate G.
In addition, the glass plate package of this invention is not limited to what laminates | stacks the glass plate G upright like the glass plate package 50 shown in FIG. The glass plate package of the present invention may be one obtained by horizontally laminating glass plates G, such as a plate-shaped body storage container disclosed in Utility Model Registration No. 3165873.

In the glass plate package of the present invention, examples of the glass plate G include various known glass plates. Among them, a glass plate on which elements such as wiring and electrodes as described above are formed on the surface is preferable, and a glass plate for FPD is particularly preferable.

As mentioned above, although the glass interleaving paper and the glass plate package of the present invention have been described in detail, the present invention is not limited to the above-described examples, and various improvements and modifications are made without departing from the gist of the present invention. Of course, it may be.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

[Example 1]
Virgin pulp as a raw material was put into toluene diluted 50 times (volume ratio) with ethanol (the ratio of pulp to solvent was 100: 1 by mass ratio) and stirred for 10 hours at room temperature. Filtration was performed to obtain a pulp as a washed raw material.
Then, using the washed pulp as a raw material, a glass interleaving paper was produced using an example of an apparatus for producing glass interleaving paper shown in FIGS.
The produced glass interleaving paper (thickness 0.08 mm) was cut into about 1 cm square, and components were extracted from the glass interleaving paper using a hexane for about an hour and a half with a Soxhlet extractor. The obtained extract was concentrated to dryness on a rotary evaporator and reconstituted with 1 mL of deuterated chloroform to prepare a sample. The apparatus was analyzed by NMR spectrum using a Nuclear Magnetic Resonance apparatus (manufactured by Bruker Biospin, AVANCE 500 type) to identify an organosilicon compound. As a result, the content of the organosilicon compound was 2 ppm.

[Comparative Example 1]
A glass interleaving paper was produced in the same manner as in Example 1 except that the raw material pulp was not washed. When the produced glass interleaving paper (thickness 0.08 mm) was analyzed in the same manner as in Example 1, the content of the organosilicon compound was 4 ppm.

[Example 2]
In the general glass interleaf manufacturing apparatus shown in FIGS. 1 and 2, showers for washing the paper were provided at two locations in the dryer part 24.
Using such a manufacturing apparatus, using virgin pulp as a raw material, drying is performed while performing shower washing of paper with toluene diluted 50 times (volume ratio) with ethanol in a dryer part 24 to produce glass interleaving paper did.

When the produced glass slip (thickness 0.08 mm) was analyzed in the same manner as in Example 1, the content of the organosilicon compound was 1 ppm.

[Comparative Example 2]
A glass interleaving paper was produced in the same manner as in Example 2 except that the shower cleaning of the paper in the dryer part 24 was not performed.
When the produced glass interleaving paper (thickness 0.08 mm) was analyzed in the same manner as in Example 1, the content of the organosilicon compound was 4 ppm.

[Performance evaluation]
A glass plate for FPD having a thickness of 0.5 mm and a size of 1500 × 1300 mm (the glass for liquid crystal AN100 manufactured by Asahi Glass Co., Ltd.) having a thickness of 0.5 mm and the glass interleaving paper produced in Examples 1 and 2 and Comparative Examples 1 and 2 above. A glass plate laminate in which a plurality of glass plates are laminated.
This glass plate laminate was prepared for 5 pallets (2000 glass plates) for each of the glass slip sheets of Examples 1 and 2 and Comparative Examples 1 and 2.
The glass plate laminate was loaded on a general glass plate packing pallet to form a glass plate packing.
The glass plate package thus produced was transported from Taiwan to Japan by ship.

From the glass plate package conveyed to Japan, 100 glass plates were randomly selected for each glass plate laminate.
Next, linear wiring having a width of 5 μm was formed on the surfaces of all the selected glass plates at intervals of 80 μm by an existing method.

The disconnection situation of the formed wiring was confirmed.
As a result, in the glass plates laminated using the glass interleaving papers of Examples 1 and 2, no disconnection was observed in the wiring in all the glass plates.
On the other hand, in the glass plate laminated | stacked using the glass interleaving paper of the comparative examples 1 and 2, the disconnection was confirmed by wiring by all the glass plates.
From the above results, it has been clarified that the glass interleaving paper of the present invention is effective in suppressing defects such as disconnection caused by contamination.

The glass interleaving paper of the present invention can greatly suppress the occurrence of defects such as wiring due to contamination due to transfer from the glass interleaving paper to the glass plate, reduce the production cost of FPD, etc., and improve the yield It can be used as a glass plate package of a glass plate for FPD.

It should be noted that the entire content of the specification, claims, drawings and abstract of Japanese Patent Application No. 2012-280085 filed on December 21, 2012 is cited herein as the disclosure of the specification of the present invention. Incorporated.

12 Head Box 14 Wire Part 16 Lower Wire 18 Upper Wire 20 Press Part 24 Dryer Part 26 Calendar Part 28 Reel 30 Jumbo Roll 32 Roll 34 Cutter 36 Winder

50 Glass plate package 52 Pallet 54 Base 56 Tilting table 58 Mounting table 60 Glass interleaving paper G Glass plate

Claims

A glass interleaving paper interposed between glass plates when laminating a plurality of glass plates, wherein the content of the organic compound having a silicon element is 3 ppm or less.
The glass interleaving paper according to claim 1, wherein the organic compound contains silicone (organopolysiloxane).
The glass interleaving paper according to claim 1 or 2, wherein a raw material of the glass interleaving paper is a pulp having a silicone content of 10 ppm or less.
The glass composite according to any one of claims 1 to 3, wherein a raw material of the glass interleaving paper is at least one selected from the group consisting of chemical pulp, semi-chemical pulp, mechanical pulp, non-wood fiber pulp, and synthetic pulp. paper.
The glass interleaving paper according to any one of claims 1 to 4, wherein the thickness of the paper is 0.05 to 0.10 mm.
A method for producing glass interleaving paper according to any one of claims 1 to 5, wherein the pulp used as the raw material of the glass interleaving paper is washed with an organic solvent, before and / or after drying. An organic compound having an elemental silicon adhering to pulp or paper selected from the group consisting of a step of performing shower cleaning with an organic solvent, and a step of passing glass interleaving paper into a water tank filled with the organic solvent. A papermaking method comprising a step of dissolving and removing.
The papermaking method according to claim 6, wherein the organic solvent is an organic solvent capable of dissolving an organic compound containing silicon element, or a solvent obtained by diluting the organic solvent.
The papermaking method according to claim 7, wherein the organic solvent is an aromatic hydrocarbon organic solvent.
A glass plate package formed by laminating a plurality of glass plates with the glass interleaving paper according to any one of claims 1 to 5 interposed therebetween.
The glass plate package according to claim 9, wherein the glass plate is a glass plate for a flat panel display.