JP2014118663A - Glass interleaf paper and glass plate packing body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass interleaf paper used for lamination of glass plates, preventing wiring failures formed on the glass plates and the like due to extraneous metal materials transferred from the glass interleaf paper.SOLUTION: The problem is solved by making the content of metal elements 0.1 mass% or less or gas permeability rate of 10 sec. or more.

Description

  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, a glass plate (glass substrate) for FPD has elements such as fine electric wiring (hereinafter also referred to as wiring), electrodes, electric circuits, and partition walls formed on the surface. Even if there is, it causes defects such as disconnection and short circuit. Therefore, high surface cleanliness is required for glass plates used in these applications.

  Generally, a glass plate is stored and transported in a state of being laminated on a pallet for packing. 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 of interposing a so-called glass interleaving paper, in which paper is sandwiched between laminated glass plates and the surfaces of adjacent glass plates are separated, has been conventionally used. Has been.

  However, in the method of interposing glass interleaving paper between the glass plates, the glass interleaving paper and the surface of the glass plate are in direct contact. Therefore, the resin component etc. which exists in the surface of glass interleaving paper are transcribe | transferred on the surface of a glass plate, the surface of a glass plate is contaminated, and problems, such as a paper skin pattern, a burn, and a stain, arise on a glass plate.

As a method for solving such a problem, for example, Patent Document 1 describes glass interleaving paper containing 0.1% by weight or more of sodium tripolyphosphate.
Patent Document 2 describes a glass slip sheet containing 50 mg / m ² or more of sodium tetraborate.
Furthermore, Patent Document 3 describes 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.

JP-A-6-316432 Japanese Patent Laid-Open No. 7-101483 International Publication No. 2011/118502

According to these glass interleaving papers, the resin component contained in the glass interleaving paper can be reduced from being transferred to the surface of the glass plate, and contamination of the surface of the glass plate can be suppressed.
However, these glass interleaving papers are caused by contamination of the glass plate surface due to transfer from the glass interleaving paper when used on a glass plate such as an FPD glass plate on which elements such as wiring and electrodes are formed. Therefore, it is difficult to sufficiently suppress the occurrence of defects such as fine wiring, electrodes, and electric circuits.

  An object of the present invention is to solve the problems of the prior art, and when an element such as a wiring or an electrode is formed on the surface of a glass plate, a disconnection or a short circuit caused by contamination due to transfer from the glass interleaf. It is in providing the glass interleaving paper which can suppress generation | occurrence | production of the defect of an element significantly, and the glass plate package using this glass interleaving paper.

  In order to achieve the above object, the first aspect of the glass interleaving paper of the present invention is a glass interleaving paper interposed between the glass plates when laminating a plurality of glass plates, and the content of the metal element The glass interleaving paper is characterized by being 0.1% by mass or less.

  In the first aspect of the glass interleaving paper of the present invention, the air permeability is preferably 10 seconds or more.

  The second aspect of the glass interleaving paper of the present invention is a glass interleaving paper interposed between the glass plates when laminating a plurality of glass plates, and the air permeability is 10 seconds or more. Provide the characteristic glass slip.

In such a second embodiment of the glass interleaving paper of the present invention, the content of the metal element is preferably more than 0.1% by mass.
The air permeability is preferably 20 seconds or more.

  In the first and second aspects of the glass interleaving paper of the present invention, examples of the metal element contained include at least one of titanium, aluminum, iron, zinc, chromium, copper, and silicon. .

  Furthermore, the glass plate package of the present invention provides a glass plate package characterized 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 an element such as a fine wiring or an electrode is formed on the surface of the glass plate laminated with the glass interleaving interposed therebetween, the metallic foreign material transferred from the glass interleaving paper Defects in the element such as disconnection and short circuit caused 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 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, and in particular, FPD glass plates (glass substrates) such as plasma displays and liquid crystal displays. When laminating, glass interleaving paper interposed between glass plates is preferable.

In such a glass interleaving paper of the present invention, the first aspect is a glass interleaving paper having a metal element content (a ratio of the mass of the metal element to the mass of the glass interleaving paper) of 0.1% by mass or less. Moreover, the 2nd aspect of the glass interleaving paper of this invention is glass interleaving paper whose air permeability is 10 second or more.
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 provided on the surface of a glass plate for FPD laminated using the glass interleaving paper. Defects that occur in wiring, electrodes, and the like when formed can be greatly reduced.

As described above, various proposals have conventionally been made for suppressing the transfer of resin components and the like from glass interleaving paper to a glass plate.
However, according to the study by the present inventors, in a glass plate in which elements such as wiring and electrodes are formed on the surface, such as a glass plate for FPD, the transfer of the resin component from the glass interleaf to the glass plate is suppressed. Even when wirings, electrodes, and the like are formed on the surface, defects such as wirings occur with a probability that is not low.

  The inventors of the present invention have made extensive studies on this cause. As a result, it has been found that the metal foreign matter transferred from the glass slip sheet to the glass plate is a major cause of defects such as wiring.

As is well known, in recent years, the FPD has a high spatial resolution, and as a result, the wiring, electrodes, and the like 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 thin film) that becomes a wiring even if a slight amount of metal foreign matter is present on the surface of the glass plate. ) Film formation and patterning by etching. For this reason, when a metal is transferred from the glass interleaving paper to the glass plate, this metal becomes a foreign substance and becomes a major factor in the occurrence of defects when wiring, electrodes, etc. are formed on the glass plate.

As a result of further investigations, the inventors have made the metal element content of the glass interleaving paper 0.1 mass% or less, or the air permeability of the glass interleaving paper 10 seconds or more. Thus, it has been found that the occurrence of defects such as wiring caused by metal foreign matter transferred from glass interleaving paper to a glass plate can be greatly reduced.
That is, by using the glass interleaving paper of the present invention, fine wiring, electrodes, and the like on the surface of the glass plate without performing high-level cleaning or the like for removing metal foreign matter on the surface of the glass plate for FPD, etc. When an element such as an electric circuit and a partition wall is formed, it is possible to greatly suppress the occurrence of defects such as wiring caused by metal foreign matter. 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 mentioned above, the 1st aspect of the glass interleaving paper of this invention is a glass interleaving paper whose metal element content is 0.1 mass% or less.
If the content of the metal element exceeds 0.1% by mass, the transfer of the metal from the glass interleaving paper to the glass plate cannot be sufficiently suppressed, and the wiring caused by the metal foreign matter transferred from the glass interleaving paper to the glass plate The effect of reducing the occurrence of defective elements such as disconnection or short circuit cannot be sufficiently obtained.
In the first aspect of the glass interleaving paper of the present invention, the metal element includes a semimetal. In the present invention, the semimetal refers to six kinds of elements such as boron, silicon, germanium, arsenic, antimony and tellurium.
In addition, in the 1st aspect of the glass interleaving paper of this invention, and the 2nd aspect mentioned later, as a specific example of the metal element to contain, at least 1 type of titanium, aluminum, iron, zinc, chromium, copper, and silicon is illustrated. Is done.

In the glass interleaving paper of the present invention, the content of the metal element is preferably 0.07% by mass or less, more preferably 0.05% by mass or less.
By setting the metal element content of the glass interleaving paper to this amount, disconnection, short circuit, etc. that occur when wiring or electrodes are formed on the surface of an FPD glass plate using the glass interleaving paper of the present invention. Defects in elements can be more suitably suppressed.

In addition, in the glass interleaving paper of this invention, the content of a metal element is so preferable that it is low. That is, in the glass interleaving paper of the present invention, there is no limitation on the lower limit of the metal element content.
However, glass interleaving paper having an extremely low metal element content (for example, close to 0% by mass) takes time and effort to produce. Considering this point, in the glass interleaving paper of the present invention, the content of the metal element is preferably 0.03% by mass or more. In addition, in the glass interleaving paper of this invention, the kind of metal element to contain is not specifically limited.

Here, in the 1st aspect of the glass interleaving paper of this invention, it is preferable that air permeability is 10 second or more, and it is especially preferable that it is 20 second or more. The air permeability will be described later.
By setting the air permeability to 10 seconds or more, particularly 20 seconds or less, it is more preferable due to the synergistic effect of such an effect of making the metal element content 0.1% by mass or less and the containment effect described later. Moreover, the transfer of the metal from the glass interleaving paper to the glass plate can be suppressed.

  The 1st aspect of the glass interleaving paper of this invention is a well-known glass interleaving paper used for lamination | stacking of a glass plate fundamentally except content of a metal element being 0.1 mass% or less.

Therefore, the glass interleaving paper of the present invention is a chemical pulp such as kraft pulp (KP), sulfite pulp (SP), soda pulp (AP), semi-chemical pulp (SCP), semi-chemical pulp (CGP), etc. Chemical pulp, groundwood pulp (GP), thermomechanical pulp (TMP, BCTMP), refiner Grandwood pulp (RGP) and other mechanical pulp, non-wood fiber pulp, synthetic pulp, etc. Any known glass interleaving paper made of various raw materials can be used. Furthermore, the glass interleaving paper of the present invention may be a raw material of a mixture thereof, or a raw 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.

Such a first aspect of the glass interleaving paper of the present invention can basically be produced by utilizing a known glass interleaving papermaking method.
As a suitable example, in the papermaking process of glass interleaving paper, a manufacturing method in which shower cleaning is performed at least before and during the drying process, and a manufacturing method in which ultrasonic irradiation and suction are performed after drying are exemplified.

FIG. 1 and FIG. 2 conceptually show an example of a general glass interleaving apparatus (general glass interleaving apparatus).
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).

Glass interleaving paper is usually not shipped as a jumbo roll 30. As an example, the glass interleaving paper is cut into a width corresponding to a product, wound up, and shipped as a roll 32 around which a long glass interleaving paper having a predetermined length of about 8000 to 10000 m is wound. That is, the glass slip sheet is 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 by the cutter 34 (cut in the width direction), and a long glass slip sheet is wound with a predetermined width. The rolled roll 32 is shipped to a glass manufacturer or the like.

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.
The cut sheet may be cut by a glass slip sheet manufacturer.

As a manufacturing method of the first aspect of the glass interleaving paper of the present invention, in such a glass interleaving paper manufacturing apparatus (paper making process), paper is provided in front of the dryer part 24 and in at least one of the dryer parts 24. A method for shower cleaning is exemplified.
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. Shower with clean water that does not contain elements. Thereby, the metal contained in paper and a metal containing component can be knocked out, and the glass interleaving paper of this invention whose content of a metallic element is 0.1 mass% or less can be manufactured.
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 conditions for paper shower cleaning, such as the amount of cleaning water used for shower cleaning and the jet speed of the cleaning water, depend on the thickness of the paper, the paper transport speed and transport path, the type of paper (raw materials, etc.), etc. What is necessary is just to set suitably the conditions which can make the quantity of the metal element which glass interleaving paper contains to 0.1 mass% or less.

As another production method of the first aspect of the glass interleaving paper of the present invention, at least one of the dried paper and the glass interleaving paper (that is, downstream of the dryer part 24) is irradiated with ultrasonic waves, and A method of performing suction in the vicinity of the ultrasonic irradiation unit is exemplified.
As an example, an ultrasonic irradiation device and a suction device are provided in the conveyance path (one place or a plurality of places) of the glass interleaf between the jumbo roll 30 and the roll 32 shown in FIG. In the vicinity of the ultrasonic irradiation unit, suction is performed by a suction means. As a result, the metal and metal-containing components contained in the glass interleaving paper can be knocked out by ultrasonic irradiation, and the released metal and other foreign matters can be removed from the vicinity of the glass interleaving paper. The glass interleaving paper of the present invention having an amount of 0.1% by mass or less can be produced.

Such ultrasonic irradiation and suction can be performed at various timings other than between the jumbo roll 30 and the roll 32 as long as the paper is dried.
For example, such ultrasonic irradiation and suction may be performed between the dryer part 24 and the calendar part 26 and between the calendar part 26 and the reel 28. Further, in the glass manufacturer where the glass interleaving paper is used, it is necessary to pull out the glass interleaving paper from the roll 32 and cut it into a cut sheet, or after cutting the glass interleaving paper into a cut sheet. Sonication and suction may be performed.
Further, a plurality of these timings may be used in combination to perform ultrasonic irradiation and suction on dried paper or glass interleaving paper.

  In general, the effect of ultrasonic irradiation and suction on dried paper or glass interleaving paper increases as the timing approaches the use of glass interleaving paper (interposition between a plurality of glass plates).

  In addition, the conditions of ultrasonic irradiation and suction to the dry paper and glass interleaving paper, such as the intensity and irradiation amount of ultrasonic waves, the suction amount and the suction force, and the thickness of the dry paper and glass interleaving paper as before, Depending on the transport speed and transport path of the dried paper or glass interleaving paper, the type (raw material, etc.) of the dried paper or glass interleaving paper, the amount of the metal element contained in the glass interleaving paper is 0.1% by mass or less What is necessary is just to set the conditions which can be performed suitably.

  Further, the first aspect of the glass interleaving paper of the present invention may be manufactured by performing both shower cleaning and ultrasonic irradiation and suction.

As mentioned above, the 2nd aspect of the glass interleaving paper of this invention is a glass interleaving paper whose air permeability is 10 second or more. Here, in the present invention, the air permeability is an air permeability conforming to “JIS P8117: 2009”.
In addition, the 2nd aspect of the glass interleaving paper of this invention is the same as the glass interleaving paper of the said 1st aspect, except that air permeability is 10 second or more and there is no limitation in metal element content. Therefore (that is, since it is the same as a known glass interleaving paper except that it has a limitation of air permeability), the following description mainly focuses on different points.

As is well known, the air permeability is the time until a certain amount of air passes. The shorter the time, the easier the air passes.
Therefore, by setting the air permeability of the glass interleaving paper to 10 seconds or more, the metal and the metal-containing component contained in the glass interleaving paper can be contained inside the glass interleaving paper. As a result, as described above, it is possible to greatly reduce the occurrence of defects such as wiring caused by the metallic foreign matter transferred from the glass slip sheet to the FPD glass plate or the like.
That is, according to the second aspect of the glass interleaving paper of the present invention, even if it contains a metal element exceeding 0.1% by mass, as in ordinary glass interleaving paper, it is transferred from the glass interleaving paper to the glass plate. The occurrence of defects such as wiring caused by metallic foreign objects can be greatly reduced.

  In the second aspect of the glass interleaving paper of the present invention, if the air permeability is less than 10 seconds, the transfer of the metal and the metal-containing component from the glass interleaving paper to the glass plate cannot be sufficiently suppressed, and the glass interleaving to the glass The effect of reducing the occurrence of defects such as wiring caused by metal foreign matter transferred to the plate cannot be sufficiently obtained.

In the second aspect of the glass interleaving paper of the present invention, the air permeability is preferably 20 seconds or more, more preferably 25 seconds or more.
By setting the air permeability of the glass interleaving paper within this range, it is possible to more suitably suppress the occurrence of defects when wirings, electrodes, etc. are formed on the surface of the glass plate using the glass interleaving paper of the present invention.

In addition, in the glass interleaving paper of this invention, air permeability is so preferable that it is high. That is, in the glass interleaving paper of the present invention, the upper limit of the air permeability is not limited.
However, glass interleaving paper with extremely high air permeability requires labor and cost for manufacturing, as before. Considering this point, in the glass interleaving paper of the present invention, the air permeability is preferably 60 seconds or less.

Such a second aspect of the glass interleaving paper of the present invention can also be produced by utilizing a known glass interleaving papermaking method.
As a preferred example, there is exemplified a method in which a calendering process is performed in the paper making process of glass interleaving paper so that the air permeability of the glass interleaving paper is 10 seconds or more. As an example, in the apparatus for producing glass interleaving paper shown in FIG. 1, in the calendar part 26, the air permeability is 10 seconds or more by adjusting the conditions of the calendar process such as the adjustment of the pressing force by the calendar roll. A method for producing the second embodiment of the inventive glass interleaving paper is illustrated.

As mentioned above, the 1st aspect of the glass interleaving paper of this invention is a glass interleaving paper whose metal element content is 0.1 mass% or less. On the other hand, the 2nd aspect of the glass interleaving paper of this invention is glass interleaving paper whose air permeability is 10 second or more.
The glass interleaving paper of the present invention has such a configuration to suppress the transfer of metal and metal-containing components from the glass interleaving paper to the glass plate, and when forming wirings, electrodes, etc. on the glass plate, Defects such as wiring caused by metal foreign matter can be greatly reduced.

Here, the effect of suppressing defects such as wiring caused by the metal foreign matter transferred from the glass interleaving paper to the glass plate for FPD, etc. is the effect of suppressing at least one surface of the glass interleaving paper (the element forming surface of the glass plate). It can also be obtained by applying a coating agent on the surface to be contacted (forming a coating agent layer) and encapsulating a metal or a metal-containing component inside the glass interleaving paper with the coating agent.
For example, when a coater part is provided between the dryer part 24 and the calendar part 26 in the glass interleaf manufacturing apparatus shown in FIG. 1, a coating agent may be applied here.

Examples of the coating agent that can be used for this purpose include a treatment agent containing a water-soluble organic acid salt.
As an example of this treatment agent, a treatment liquid that does not contain an alkali component (10000 ppm or less) and contains at least one carboxylate of monosaccharide, oligosaccharide, and polysaccharide as a water-soluble organic acid salt is exemplified. The Among them, the water-soluble organic acid salt is preferably a carboxylic acid salt of a polysaccharide such as alginic acid, hyaluronic acid, chondroitin and heparin, and among them, the carboxyl group is substituted with a cation such as an ammonium ion or a metal ion. Polysaccharide carboxylates are preferred, and ammonium alginate is particularly preferred.
This treating agent is described in detail in International Publication No. 2007-007530.

Various known methods can be used as the coating method of the coating agent.
As an example, examples of the coating method include a bar coater, a blade coater, an air knife coater, a roll coater, and the like. If necessary, the coating agent may be dried by warm air or a heater, or the coating agent may be cured (crosslinked) by irradiation with light such as ultraviolet rays or heating.

  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 this inclined surface should just be an angle which can laminate | stack the glass plate G stably, can be stored and conveyed, and is 85 degrees or less with respect to a horizontal direction normally, for example, is 85 degrees-70 degrees is there.
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 packing pallet 52, the glass plate G is placed on the upper surface of the placing table 58 and stacked 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.

Thereby, the glass plate package 50 of the present invention is formed.
Further, 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 to cover.
In addition, the glass plate package of the present invention is not limited to the one in which the glass plate G is stacked and stacked like the glass plate package 50 shown in FIG. 3, for example, a plate shown in Utility Model Registration No. 316597 The glass plate G may be horizontally stacked as in the case storage container.

  In the glass plate package of the present invention, as the glass plate G, various known glass plates are exemplified. 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.

  EXAMPLES Next, although an Example demonstrates this invention still in detail, this invention is not limited to these Examples at all.

[Example 1]
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, virgin pulp was used as a raw material, and drying was performed while performing shower washing of the paper with pure water in the dryer part 24 to produce a glass interleaving paper. In this example, the calendar process in the calendar part 26 was not performed.

The produced glass interleaving paper is cut into a cut sheet according to the size of the glass plate to be described later, and is a known method using ICP (Inductively Coupled Plasma) mass spectrometry and ICP emission spectroscopic analysis. The metal element content of was analyzed.
As a result, the content of the metal element in the glass interleaving paper was 0.08% by mass.

[Comparative Example 1]
A glass interleaving paper was produced in the same manner as in Example 1 except that the shower cleaning of the paper in the dryer part 24 was not performed.
When the produced glass interleaving paper was analyzed similarly to Example 1, content of a metallic element was 0.15 mass%.

[Example 2]
In the general glass interleaving apparatus shown in FIGS. 1 and 2, an ultrasonic irradiation device and a suction device are provided between the cutter 34 and the roll 32.
Using such a manufacturing apparatus, using glass of virgin pulp as a raw material, the glass interleaf is irradiated with ultrasonic waves between the cutter 34 and the winder 36, and suction is performed in the vicinity of the ultrasonic irradiation position. A glass interleaving paper was produced. In this example, the calendar process in the calendar part 26 was not performed.
When the produced glass interleaving paper was analyzed similarly to Example 1, content of a metallic element was 0.09 mass%.

[Comparative Example 2]
A glass interleaving paper was produced in the same manner as in Example 2 except that ultrasonic irradiation and suction to the glass interleaving paper were not performed between the cutter 34 and the winder 36.
When the produced glass interleaving paper was analyzed similarly to Example 1, content of a metallic element was 0.12 mass%.

[Example 3]
Glass interleaving paper was produced using virgin pulp as a raw material using a general glass interleaving apparatus shown in FIGS. 1 and 2.
In this example, the calendering condition in the calender part 26 is 100 kg / cm.
The produced glass interleaving paper was cut into a cut sheet according to the size of the glass plate described later, and the air permeability of the glass interleaving paper was measured in accordance with “JIS P8117: 2009”. there were.
As a reference, when this glass interleaving paper was analyzed in the same manner as in Example 1, the content of the metal element was 0.15% by mass.

[Comparative Example 3]
A glass interleaving paper was produced in the same manner as in Example 3 except that the calendar process was not performed in the calendar part 26.
When the air permeability of the produced glass interleaving paper was measured in the same manner as in Example 3, it was 9 seconds.
As a reference, when this glass interleaving paper was analyzed in the same manner as in Example 1, the content of the metal element was 0.15% by mass.

[Performance evaluation]
The glass slip sheets prepared in Examples 1 to 3 and Comparative Examples 1 to 3 are 0.5 mm thick and have a 1500 × 1300 mm FPD glass plate (liquid crystal glass AN100 manufactured by Asahi Glass Co., Ltd.). A glass plate laminate in which a plurality of glass plates were laminated was interposed therebetween.
This glass plate laminated body was produced for 5 pallets (2000 glass plates) for each glass interleaving paper of Examples 1 to 3 and Comparative Examples 1 to 3.
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 by ship from Taiwan to Takasago.

From the glass plate package conveyed to Takasago, 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.

The disconnection situation of the formed wiring was confirmed.
As a result, in the glass plate laminated | stacked using the glass interleaving paper of Examples 1-3, a disconnection and a short circuit were not recognized by wiring by all the glass plates.
On the other hand, in the glass plate laminated | stacked using the glass interleaving paper of Comparative Examples 1-3, at least one of a disconnection and a short circuit was confirmed by wiring with all the glass plates.
From the above results, the effects of the present invention are clear.

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 Inclined Stand 58 Mounting Base 60 Glass Interleaf G Glass plate

Claims (8)

  A glass interleaving paper interposed between glass plates when laminating a plurality of glass plates, wherein the content of the metal element is 0.1% by mass or less.   The glass interleaving paper according to claim 1 whose air permeability is 10 seconds or more.   A glass interleaving paper interposed between glass plates when laminating a plurality of glass plates, wherein the air permeability is 10 seconds or more.   The glass interleaving paper according to claim 3, wherein the content of the metal element is more than 0.1 mass%.   The glass interleaving paper according to claim 3 or 4 whose air permeability is 20 seconds or more.   The glass interleaving paper according to any one of claims 1 to 6, comprising at least one of titanium, aluminum, iron, zinc, chromium, copper and silicon.   A glass plate package comprising a plurality of glass plates laminated with the glass interleaving paper according to any one of claims 1 to 6 interposed therebetween.   The glass plate package according to claim 7, wherein the glass plate is a glass plate for a flat panel display.

Images