KR20180135857A - Laminate for glass plate and its manufacturing method - Google Patents

Abstract

The present invention relates to a lumber for a glass plate made from wood pulp, which has a ratio of the presence of talc on one surface of 10/100 m < 2 > or less and a ratio of the presence ratio of the talc on one surface to the difference Is less than 5/100 m < 2 >. The laminated paper for a glass sheet of the present invention can solve the problem resulting from the difference in the front and back surface states.

Description

Laminate for glass plate and its manufacturing method

The present invention relates to a method for manufacturing a flat panel display, such as a liquid crystal display, a plasma display, and an organic electroluminescence (organic EL) display, Paper, and the manufacture of these papers.

Generally, in a storage process for storing a plurality of glass plates for a flat panel display and a storage process for transporting them by a truck or the like, frictional damage occurs due to contact between the glass plates due to impact between the glass plates, A paper called laminating paper is sandwiched between glass plates for the purpose of preventing contamination by contaminants of the glass plate.

Since the glass plate for a flat panel display is used for a high-precision display in comparison with general construction window glass plates and window glass plates for automobiles, the glass surface maintains a clean surface free from impurities contained in the surface of the paper, An excellent flatness is required for increasing the response and viewing angle.

There have already been proposed several types of laminates which can be used for this purpose, such as laminates that can prevent cracks on the glass plate and damage to the surface, and laminates that do not contaminate the glass surface. For example, Patent Document 1 discloses a method of forming a fluorine coating film on the surface of a synthetic resin. Patent Document 2 discloses a paper comprising a polyethylene base resin foamed sheet and a polyethylene base resin film, and Patent Document 3 discloses a paper made of pulp containing 50% by mass or more of bleached chemical pulp, wherein the specific alkylene oxide base Patent Document 4 discloses a laminated sheet for glass containing water or a water-soluble polyether-denatured silicone, and Patent Document 4 discloses an amount of a resin component in a sheet of paper and uses a raw material in consideration of contamination of the glass surface.

Japanese Laid-Open Patent Publication No. 2012-188785 Japanese Laid-Open Patent Publication No. 2010-242057 Japanese Patent Application Laid-Open No. 2008-208478 Japanese Laid-Open Patent Publication No. 2006-44674

For example, it is known that when the surface of a glass plate is contaminated at the time of manufacturing a color filter substrate of an array process, which is one of manufacturing processes of a TFT liquid crystal display, problems such as disconnection occur. The color filter substrate is fabricated by forming a thin film of a semiconductor film, an ITO film (transparent conductive film), an insulating film, an aluminum metal film, or the like on a glass plate by sputtering or vacuum evaporation or the like, but if contaminants exist on the surface of the glass plate, Or a short circuit occurs due to a defect in the insulating film. In manufacturing a color filter substrate, a pattern is formed on the glass plate by photolithography. In this process, when contaminants are present on the glass plate surface at the time of applying the resist, pinholes are generated in the resist film after exposure or development, The result is disconnection or short circuit. The same problem has been confirmed in the manufacture of organic EL displays. Since an organic EL display is manufactured by forming a thin film of an ITO anode, an organic light emitting layer, or a cathode on a glass substrate by sputtering, vapor deposition, printing, or the like, do.

It is difficult to specify the cause of the contamination of the glass plate, but it has been found that one of the causes is a fine foreign substance which is transferred from the surface of the glass plate to the surface of the glass plate.

It has also been found that one of these foreign substances is talc.

When there is a difference in the physical state of the front and back surfaces of the laminate when sandwiching the laminate for the glass plate between the glass plates, it may be necessary to consider the specific surface of the laminate to be in contact with the surface of the glass plate. For example, since a glass plate for a flat panel display is formed with a fine circuit or the like on its surface, even if a very small amount of foreign matter is adhered to the glass plate, the adhesion is particularly avoided. However, The risk that the foreign matter will be transferred to the surface of the glass plate becomes high. Therefore, it is necessary to take care that the lumber is brought into contact with the surface of the glass plate so that the surface of the glass plate is contacted with the foreign substance- In this case, it is conceivable to sandwich the two sheets of lumber between the glass plates so that the surface of the each lumber having a small amount of foreign substances present on the surface thereof faces the glass plate. However, the amount of laminated paper used is increased, Is increased, it is not preferable from the viewpoint of handling.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems derived from the difference in the front and back surface states of a laminated sheet for a glass plate. In particular, it is an object of the present invention to provide a laminated sheet for a glass plate in which all of the front and back surfaces are brought into contact with the glass plate.

As a result of intensive studies, the inventors of the present invention found that the amount of talc present on the surface of the glass sheet for laminate is reduced and the difference in the presence ratio of talc on the front and back surfaces of the laminate is suppressed, It is possible to provide a laminated sheet for a glass plate which can suppress the difference in the rear surface state and bring all the front and back surfaces into contact with the glass plate.

A first aspect of the present invention is a laminating sheet for a glass plate made from wood pulp, the ratio of the presence of the talc on one surface being 10 / 100m 2 or less, and the ratio of the presence of the talc on one surface to the And the difference in the existence ratio is within 5 pieces / 100 m < 2 >.

The average particle diameter of the talc is preferably 1 to 10 mu m.

The talc may be complexed with a hydrophobic substance. In addition, it is preferable that the hydrophobic material includes silicon.

The average particle diameter of the combined form of the talc and the hydrophobic substance is preferably 30 탆 or more.

The thickness of the laminate for a glass plate is preferably 20 to 200 mu m.

It is preferable that the average deviation (MMD) of the coefficient of friction of the surface by the KES method is not more than 0.022.

The glass plate is preferably for a display, and more preferably for a TFT liquid crystal display or an organic EL display.

A second aspect of the present invention is a method for producing a laminate for a glass plate,

A slurry preparation process for preparing a slurry of wood pulp,

A sheet forming step of forming the slurry into a sheet form,

A wet sheet preparation step of dehydrating the sheet to form a wet sheet,

And a drying step of drying the wet paper to obtain the laminated paper,

And dehydration is performed from both sides of the sheet in the wet paper making process.

It is preferable that the dehydration is performed by suction.

It is preferable that the difference between the dehydration rate of the suction on one surface of the sheet and the dehydration rate of the suction on the other surface is 10% or less of the dehydration rate of the suction on the other surface.

It is preferable that the manufacturing method further includes an additional sucking step of sucking both sides of the lumber after the drying step.

The present invention also relates to a laminate for a glass plate according to the first aspect of the present invention, and a laminate with a glass plate.

The present invention also relates to a method for protecting a glass plate including a step of disposing a laminate for a glass plate between glass plates according to the first aspect of the present invention.

The amount of talc present on the surface of the laminate for a glass sheet of the present invention is small and the difference in the ratio of the presence of talc on the front and back surfaces of the laminate is suppressed. The difference is suppressed. Therefore, the whole surface of the laminated paper for a glass sheet of the present invention may be brought into contact with the glass plate. Accordingly, the laminate for a glass plate of the present invention is excellent in handleability.

In addition, since the surface of the laminate is in contact with the back surface of the laminate in the wound state, for example, when there are few talks on the surface but there are many talks on the back surface of the laminate, Even if the surface is to be brought into contact with the surface of the glass plate, the talc on the back surface of the laminated paper is transferred to the surface in the wound state, and the cleanliness of the surface may be deteriorated.

However, since the transition of the talc from one surface of the laminate to the other surface is suppressed even if the laminated paper for a glass plate of the present invention is rolled up, there is a fear of deterioration of the cleanliness of the laminated surface no need.

In addition, since the amount of talc present on the surface of the laminate for a glass sheet of the present invention is small, it is possible to effectively inhibit or avoid the transfer of the talc, which is problematic to the glass sheet, from the laminate. As described above, it is possible to prevent disconnection of a color film or the like in a manufacturing process of a TFT liquid crystal display or the like by suppressing or avoiding the transfer of a problematic talc to the glass plate.

A first aspect of the present invention is a laminating sheet for a glass plate made of wood pulp, comprising: a first layer having a ratio of the presence of a talc on one surface to a ratio of the presence of the talc on one surface to a ratio And the difference in the existence ratio is within 5 pieces / 100 m < 2 >.

Wood pulp that can be used in the present invention include wood pulp such as softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), hardwood bleached sulfite pulp (LBSP), thermomechanical pulp Of wood pulp alone or in combination. This wood pulp is used as a main component and, if necessary, it can be used as a non-wood pulp such as hemp, bamboo, straw, kenaf, mulberry, mackerel or wood, modified pulp such as cationized pulp, , Synthetic fibers such as nylon, acrylic, and polyester, chemical fibers, or microfibrillated pulp can be used alone or in combination. However, if a large amount of resin component is contained in the pulp, there is a possibility that the resin component may adversely affect the surface of the glass plate or the like. Therefore, a chemical pulp with a low possible resin component, such as a softwood bleached kraft pulp, . In addition, high-yield pulp such as deciduous pulp is not preferable because it contains many resin components. Further, when synthetic fibers or chemical fibers are mixed, the raking property is improved, and the workability in the case of using a laminate as a flat plate is improved. However, caution is required because the recyclability is deteriorated in terms of waste treatment.

The form of the wood pulp is not particularly limited and may take any form such as sheet, block or flake. The pulp on the sheet can be obtained by using, for example, a pulp machine having four processes of a wire part, a press part, a dry part and a finishing. In the wire part, the pulp fiber is papermaked using a long-distance wire or a vacuum filter, and dehydrated in the press part using a roll press. In the dry part, it is dried with a cylinder dryer, a flak dryer, etc. Finally, both ends of the sheet-like pulp are cut out and wound on a roll. Such a method is described in detail in the " Paper Pulp Manufacturing Technology Series ", which is published by the Society of Paper Pulp Technology, and the " Production Technology of Paper Pulp ". The pulp on the block can be obtained, for example, by laminating the sheet-like pulp, and the pulp on the flake can be obtained, for example, by pulverizing the sheet-like pulp.

The thickness of the sheet-like pulp is preferably 0.7 to 1.5 mm, more preferably 0.9 to 1.3 mm, and even more preferably 1.0 to 1.2 mm.

The basis weight of the sheet-like pulp is preferably 400 to 1,300 g / m 2, more preferably 500 to 1,200 g / m 2, still more preferably 500 to 1,100 g / m 2, still more preferably 500 to 1,000 g / More preferably 700 to 1000 g / m < 2 >.

In the laminated paper for a glass plate of the present invention, the presence ratio of talc on one surface is limited to 10/100 m 2 or less. The number of talks present on one surface of the glass sheet laminate is preferably 7/100 m2 or less, more preferably 5/100 m2 or less, still more preferably 3/100 m2 or less, / 100 m < 2 > or less, more preferably 0.8 / 100 m < 2 > or less, and particularly preferably 0.5 / 100 m &

In the laminated paper for a glass plate of the present invention, the difference in the ratio of the presence of the talc on one surface and the ratio of the presence of the talc on the other surface is within 5 / 100m2, preferably 4 / 100m2, More preferably within 2 m 2/100 m 2, and even more preferably within 1 m 2/100 m 2. That is, in the laminating sheet for a glass plate of the present invention, it is preferable that the ratio of the talc on one surface does not vary greatly from the ratio of the talc on the other surface to the above-mentioned specific range. The term " presence ratio " means the number of talc per unit area on the surface of the laminate. For example, a plurality of points on the surface of the laminate for a glass plate are observed by an electron microscope, Can be determined by averaging the number of learned talks. Alternatively, the existence ratio of the talc can be determined by thoroughly cleaning the surface of the predetermined area of the laminate for the glass plate with an acidic solution such as water or concentrated sulfuric acid, and counting the dropped talc.

The amount of talc present on the surface of the laminated sheet for a glass sheet of the present invention is small and the variation of the presence ratio of talc on the front and back surfaces of the laminated sheet is suppressed. Is suppressed. Therefore, in the laminated paper for a glass plate of the present invention, the presence ratio of the talc on the surface does not greatly differ from the front and back surfaces of the laminated paper. Therefore, the whole surface of the laminated paper for a glass sheet of the present invention may be brought into contact with the glass plate.

The talc in the present invention is not particularly limited. Talc is called "function magnesium silicate", the formula can be expressed as _{4SiO 2 · 3MgO · H 2 O} . The chemical composition is somewhat different depending on the place of production, and the theoretical values are 64.4% for SiO ₂ , 31.8% for MgO and 4.7% for ignition loss (moisture). Talc is also called talc.

The average particle diameter of the talc is not particularly limited, but is preferably 1 to 10 占 퐉, more preferably 1 to 8 占 퐉, even more preferably 1 to 6 占 퐉, and particularly preferably 1 to 4 占 퐉. The average particle diameter may be a volume average particle diameter, and can be measured by, for example, a laser diffraction / scattering method.

The surface area of the talc is not particularly limited, but the specific surface area by the BET method is preferably 1 m2 / g or more, more preferably 10 m2 / g or more, and further preferably 20 m2 / g or more.

The density of the talc is not particularly limited, but an apparent density based on JIS K5101 is preferably 1 g / ml or less, more preferably 0.8 g / ml or less, even more preferably 0.6 g / ml or less, ml or less, more preferably 0.2 g / ml or less.

Talc has a relatively lipophilic surface and can be complexed with a hydrophobic substance by adsorbing, for example, a hydrophobic substance such as silicone. Talc can adsorb hydrophobic substances such as silicon even in water. In the present invention, talc may be complexed with a hydrophobic substance. The mode of compounding the talc with the hydrophobic substance, particularly silicon, is not particularly limited, but at least a part of the talc may be covered with the hydrophobic substance, or the hydrophobic substance may penetrate at least a part of the talc.

The average particle size of the combined form of the talc and the hydrophobic substance is preferably 30 占 퐉 or more, more preferably 40 占 퐉 or more, and still more preferably 50 占 퐉 or more.

The hydrophobic substance is not particularly limited. The hydrophobic substance is preferably nonvolatile and may be an oil (excluding a silicone oil) such as an aliphatic hydrocarbon, a vegetable oil, an animal oil, a synthetic glyceride, an aliphatic alcohol, a fatty acid, an ester of an aliphatic alcohol and / (Excluding silicon), silicon, pitch, rubber, and mixtures thereof, and silicon is even more preferred.

The aliphatic hydrocarbons include, for example, linear or branched hydrocarbons, especially mineral oils (such as liquid paraffin), paraffin, petrolatum, petrolatum, naphthalene and the like; Hydrogenated polyisobutene and hydrogenated butene copolymers such as hydrogenated polyisobutene, isoeic acid, polydecene, and palim; And mixtures thereof.

Examples of other aliphatic hydrocarbons include linear or branched, or optionally cyclic, C ₆ -C ₁₆ lower alkanes. Examples which may be mentioned include hexane, undecane, dodecane, tridecane and isoparaffins, such as isohexadecane and isodecane.

Examples of vegetable oils include vegetable oils such as flaxseed oil, camellia oil, macadamia nut oil, sunflower seed oil, apricot seed oil, soybean oil, arara oil, hazelnut oil, corn oil, olive oil, avocado oil, , Safflower seed oil, jojoba oil, almond oil, grape seed oil, sesame oil, peanut oil, and mixtures thereof.

Examples of animal feeds include, for example, mink oil, squalene, perhydrosqualene and squalane.

Examples of the synthetic glycerides include, for example, capric acid / capric acid triglyceride.

Fatty acids should be acidic (ie, not in salt form to avoid becoming soap), may be saturated or unsaturated, contain from 6 to 30 carbon atoms, especially from 9 to 30 carbon atoms, Optionally substituted with one or more hydroxyl groups (especially 1 to 4). When the fatty acid is unsaturated, the compound may contain one to three conjugated or non-conjugated carbon-carbon double bonds. Fatty acids are selected, for example, from myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linolic acid, linolenic acid and isostearic acid.

The term "aliphatic alcohol" is in this specification refers to any of a saturated straight or branched C ₈ ~C ₃₀ alcohol, and a random selection, in particular one or a plurality of hydroxyl groups (especially 1-4) . ≪ / RTI >

C ₁₂ -C ₂₂ aliphatic alcohols in aliphatic alcohols are preferred, and C ₁₆ -C ₁₈ saturated aliphatic alcohols are more preferred. Of these, lauryl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, undecyl alcohol, myristyl alcohol, and mixtures thereof.

Examples of esters of fatty acids and / or aliphatic alcohols include esters of linear or branched C ₁ to C ₂₆ aliphatic mono- or di-acids, saturated or unsaturated, and saturated or unsaturated linear or branched C ₁ to C ₂₆ esters of aliphatic monohydric alcohols or polyhydric alcohols, and the total number of carbon atoms in the esters is preferably 10 or more.

The resin (excluding silicon) is not particularly limited as long as it is hydrophobic. Examples of the resin include thermoplastic resins such as polyolefin, polystyrene, poly (meth) acrylate, polyacrylamide, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, polyester, polycarbonate, polyamide, Thermosetting resins such as resin, polyurethane, melamine resin and urea resin, and mixtures thereof.

Silicone oils include silicone. The silicone oil is hydrophobic and its molecular structure may be cyclic, straight chain or branched. The kinematic viscosity of the silicone oil at 25 캜 is usually in the range of 0.65 to 100,000 mm 2 / s, but may be in the range of 0.65 to 10,000 mm 2 / s.

The silicone oil includes, for example, linear organopolysiloxanes, cyclic organopolysiloxanes, and branched organopolysiloxanes.

Examples of the linear organopolysiloxane, the cyclic organopolysiloxane, and the branched organopolysiloxane include the following compounds represented by the following formulas (1), (2) and (3):

R ¹ ₃ SiO- (R ¹ ₂ SiO) _a -SiR ¹ ₃ (1)

_{^{R 1 (4-c) Si}} (OSiR 1 3) c (3)

(Wherein,

R ¹ each independently represents a hydrogen atom, a hydroxyl group, or a group selected from the group represented by a substituted or unsubstituted monovalent hydrocarbon group or alkoxy group,

a is an integer of 0 to 1000,

b is an integer of 3 to 100,

and c is an integer of 1 to 4, preferably an integer of 2 to 4)

, And organopolysiloxanes represented by the following general formula (1).

The substituted or unsubstituted monovalent hydrocarbon group is typically a substituted or unsubstituted monovalent saturated hydrocarbon group having 1 to 30 carbon atoms, preferably 1 to 10 carbon atoms, and more preferably 1 to 4 carbon atoms; A substituted or unsubstituted monovalent unsaturated hydrocarbon group having 2 to 30 carbon atoms, preferably 2 to 10 carbon atoms, and more preferably 2 to 6 carbon atoms; Is a monovalent aromatic hydrocarbon group having 6 to 30 carbon atoms, more preferably 6 to 12 carbon atoms.

Examples of the monovalent saturated hydrocarbon group having 1 to 30 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec- A straight or branched alkyl group such as a methyl group, an ethyl group, a butyl group, a heptyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group or a decyl group and a cycloalkyl group such as cyclopentyl group, cyclohexyl group, cycloheptyl group and cyclooctyl group.

Examples of the monovalent unsaturated hydrocarbon group having 2 to 30 carbon atoms include a vinyl group, a 1-propenyl group, an allyl group, an isopropenyl group, a 1-butenyl group, a 2-butenyl group, a pentenyl group and a hexenyl group A straight chain or branched alkenyl group; A cycloalkenyl group such as a cyclopentenyl group and a cyclohexenyl group; Cycloalkenylalkyl groups such as cyclopentenylethyl, cyclohexenylethyl and cyclohexenylpropyl; And alkynyl groups such as an ethynyl group and a propargyl group.

Examples of the monovalent aromatic hydrocarbon group having 6 to 30 carbon atoms include aryl groups such as a phenyl group, a tolyl group, a xylyl group and a mesityl group. A phenyl group is preferred. On the other hand, in the present specification, the aromatic hydrocarbon group includes a group of aromatic hydrocarbons and aliphatic saturated hydrocarbons in addition to the group consisting of only aromatic hydrocarbons. Examples of the group in which an aromatic hydrocarbon and a saturated hydrocarbon are combined include an aralkyl group such as a benzyl group and a phenethyl group.

The hydrogen atom on the monovalent hydrocarbon group may be substituted by at least one substituent. The substituent may be, for example, a halogen atom (fluorine atom, chlorine atom, bromine atom and iodine atom), hydroxyl group, carbino group, , An organic group including a glycidyl group, an acyl group, a carboxyl group, an amino group, a methacryl group, a mercapto group, an amide group, an oxyalkylene group and the like. Specific examples thereof include 3,3,3-trifluoropropyl group, 3-chloropropyl group, 3-hydroxypropyl group, 3- (2-hydroxyethoxy) propyl group, 3-carboxypropyl group, A decyl group, and a 3-isocyanate propyl group.

Examples of the alkoxy group include a methoxy group, an ethoxy group and a propoxy group, but a methoxy group or an ethoxy group is preferable, and a methoxy group is more preferable.

More specifically, examples of the linear organopolysiloxane include trimethylsiloxy-terminated dimethylpolysiloxane having both ends of a molecular chain (dimethylsilicone having a high viscosity such as 2 mPa · s and 6 mPa · s and a low viscosity of 1 million mPa · s or the like) Methylphenylsiloxane copolymer, molecular chain tapered trimethylsiloxy group blocked diphenylpolysiloxane, molecular chain tapered trimethylsiloxy group blocked, methylphenylsiloxane block copolymer having molecular chain, Dimethylsiloxane · diphenylsiloxane copolymer, trimethylpentaphenyltrisiloxane, phenyl (trimethylsiloxy) siloxane, both ends of molecular chain trimethylsiloxy group blocked methylalkylpolysiloxane, molecular chain ends trimethylsiloxy group blocked dimethylpolysiloxane · methylalkylsiloxane aerial Molecular chain, both ends Trimethylsiloxy group blocked Dimethyl siloxane (3,3,3-trifluoropropyl) siloxane copolymer,?,? - dihydroxypolydimethylsiloxane,?,? - diethoxypolydimethylsiloxane, 1,1,1,3,5, 5,5-heptamethyl-3-octyltrisiloxane, 1,1,1,3,5,5,5,5-heptamethyl-3-dodecyltrisiloxane, 1,1,1,3,5,5,5- 5-heptamethyl-3-hexadecyl trisiloxane, tris-trimethylsiloxymethylsilane, tris- trimethylsiloxyalkylsilane, tetraquistrimethylsiloxysilane, tetramethyl-1,3-dihydroxydisiloxane, octamethyl- , 7-dihydroxytetrasiloxane, hexamethyl-1,5-diethoxytrisiloxane, hexamethyldisiloxane, octamethyltrisiloxane, higher alkoxy-modified silicone, higher fatty acid-modified silicone, dimethicone and the like.

Examples of the cyclic organopolysiloxane include hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), 1,1-diethyl Hexamethylcyclotetrasiloxane, phenylheptamethylcyclotetrasiloxane, 1,1-diphenylhexamethylcyclotetrasiloxane, 1,3,5,7-tetravinyltetramethylcyclotetrasiloxane, 1,3,5,7-tetra Methylcyclotetrasiloxane, 1,3,5,7-tetracyclohexyltetramethylcyclotetrasiloxane, tris (3,3,3-trifluoropropyl) trimethylcyclotrisiloxane, 1,3,5,7-tetra ( Tetramethylcyclotetrasiloxane, 1,3,5,7-tetra (3-acryloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra (3-carboxypropyl) Tetramethylcyclotetrasiloxane, 1,3,5,7-tetra (3-vinyloxypropyl) tetramethylcyclotetrasiloxane Tetramethylcyclotetrasiloxane, 1,3,5,7-tetra [3- (p-vinylphenyl) propyl] tetramethylcyclotetrasiloxane, 1, , 3,5,7-tetra (N-acryloyl-N-methyl-3-aminopropyl) tetramethylcyclotetrasiloxane, 1,3,5,7- -3-aminopropyl) tetramethylcyclotetrasiloxane and the like.

Examples of the branched organopolysiloxane include methyltris-trimethylsiloxysilane, ethyltris-trimethylsiloxysilane, propyltris-trimethylsiloxysilane, tetraquistrimethylsiloxysilane and phenyltris-trimethylsiloxysilane.

As the silicone oil in the present invention, dimethylpolysiloxane, diethylpolysiloxane, methylphenylpolysiloxane, polydimethyl-polydiphenylsiloxane copolymer and polymethyl-3,3,3-trifluoropropylsiloxane are preferable. As silicone in the present invention, dimethylpolysiloxane is typical.

The silicone oil in the present invention may be a modified silicone oil. Examples of the modified silicone oil include a polyoxyalkylene-modified silicone oil.

The polyoxyalkylene-modified silicone oil is a silicone oil having a polyoxyalkylene group bonded to the molecule via a silicon-carbon bond, and preferably shows water solubility at room temperature, specifically at 25 캜, It is non-ionic.

Specifically, the polyoxyalkylene-modified silicone oil is, for example, a copolymer of a silicone oil and a polyoxyalkylene composed of a linear or branched siloxane, and may be variously represented by the following formula (4) :

R ² ₃ SiO- (R ¹ ₂ SiO) _d - (R ¹ ASiO) _e -SiR ² ₃ (4)

(Wherein,

R < ¹ > each independently represents the same as defined above,

R < ² > are each independently R < ¹ > or A,

A is independently a group represented by R ³ G, R ³ is a substituted or unsubstituted divalent hydrocarbon group, and G is at least one alkylene oxide having 2 to 5 carbon atoms such as ethylene oxide and propylene oxide , ≪ / RTI >

d represents an integer of 1 to 500,

and e represents an integer of 1 to 50).

The substituted or unsubstituted divalent hydrocarbon group includes, for example, linear or branched divalent hydrocarbon groups of 1 to 30 carbon atoms. Specific examples thereof include a methylene group, a dimethylene group, a trimethylene group, a tetramethylene group , Pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group and the like; straight chain or branched chain alkylene group having 1 to 30 carbon atoms; An alkenylene group having 2 to 30 carbon atoms such as a vinylene group, an allylene group, a butenylene group, a hexenylene group and an octenylene group; An arylene group having 6 to 30 carbon atoms such as a phenylene group and a diphenylene group; An alkylenearylene group having 7 to 30 carbon atoms such as a dimethylene phenylene group; And hydrogen atoms bonded to the carbon atoms of these groups are at least partially substituted by at least one substituent selected from the group consisting of a halogen atom such as fluorine, a hydroxyl group, a carbino group, an epoxy group, a glycidyl group, an acyl group, a carboxyl group, an amino group, a methacrylic group, a mercapto group, , An oxyalkylene group, and the like. The divalent hydrocarbon group is preferably an alkylene group having 1 to 30 carbon atoms, more preferably an alkylene group having 1 to 6 carbon atoms, and more preferably an alkylene group having 3 to 5 carbon atoms.

For example, specific examples of the polyoxyalkylene-modified silicone oil include the following:

(Wherein,

x is from 20 to 160, y is from 1 to 25, the value of x / y is from 50 to 2,

A is, for example, - (CH ₂ ) ₃ O- (CH ₂ CH ₂ O) _m - (CH ₂ CH ₂ CH ₂ O) _n -R ⁴ , m is 7 to 40, n is 0 to 40, The value of m + n is at least 1, and may be graft-polymerized or random-polymerized, and R ⁴ represents a hydrogen atom or the substituted or unsubstituted monovalent hydrocarbon group. Preferably m is 7 to 30, and n is 0 to 30).

Examples of the modified silicone oil include aminoalkyl-modified silicone oil.

The aminoalkyl-modified silicone oil is a silicone oil having an aminoalkyl group bonded thereto via a silicon-carbon bond in the molecule, and preferably shows a viscosity of 10 to 100000 cs at room temperature, specifically at 25 占 폚.

In the aminoalkyl silicone oil is the formula (4), the G _{^{formula: - (NR 4 CH 2 CH}} 2) of the _z NR ⁴ ₂ (expression, were R ⁴ are the same as above, each independently, z is 0 Lt; = z < = 4).

The content of silicon contained in the laminated paper of the present invention is preferably limited to 0.5 ppm or less, more preferably 0.4 ppm or less, more preferably 0.3 ppm or less, More preferably 0.2 ppm or less, and particularly preferably 0.1 ppm or less.

On the other hand, in the case of a very small amount which does not cause any problem in the laminate for a glass plate of the present invention, silicon may be present and therefore the content of silicon may not be zero. For example, the silicon content may be 0.1 ppb.

The silicon content is based on the required mass of the laminate. In the present invention, " absolutely dry " means a state in which moisture does not substantially exist in the object to be dried by drying.

The silicon content can be determined, for example, by subjecting the extract to an extraction process in an organic solvent capable of extracting silicon and quantifying the amount of extracted silicon.

It is preferable that the difference in the number of silicon-containing discontinuous regions having a diameter of 30 占 퐉 or more on one surface and the number of silicon-containing discontinuous regions having a diameter of 30 占 퐉 or more on one surface is within 5 / More preferably within the range of 3/1000 m2, more preferably within the range of 2/1000 m2, more preferably within the range of 1/1000 m2. That is, in the laminated paper for a glass plate of the present invention, it is preferable that the abundance of the silicon-containing discontinuous region on one surface does not greatly vary from the abundance of discontinuous regions on the other surface to the above specific range. Here, the "abundance" means the number of the silicon-containing discontinuous regions per unit area of the surface of the laminate. For example, a plurality of points on the surface of the laminate for a glass plate are magnified and observed by an electron microscope, Lt; RTI ID = 0.0 ># < / RTI > per unit area.

The shape of the silicon-containing discontinuous region in the present invention is arbitrary, and may be various shapes such as circular, elliptical, and angular shapes, but is preferably circular or elliptical. Specifically, the discontinuous area may be interspersed in the form of dots or spots.

In the present invention, the " diameter " of the discontinuous area means the area circle equivalent diameter (the diameter of the circle having the same area as the area of the discontinuous area). The diameter of the discontinuous region is preferably at least 25 mu m, more preferably at least 20 mu m, even more preferably at least 15 mu m, even more preferably at least 10 mu m, even more preferably at least 5 mu m, Or more, and particularly preferably 0.5 m or more. When the discontinuous region is circular, its diameter is " diameter ". When the discontinuous region is non-circular, it is preferable that the diameter of the area circle (the diameter of the circle having the same area as the area of the discontinuous region) is 25 占 퐉 or more, preferably 20 占 퐉 or more, More preferably at least 10 mu m, even more preferably at least 5 mu m, even more preferably at least 1 mu m, and particularly preferably at least 0.55 mu m. The diameter and the area of the discontinuous region can be measured by, for example, a microscopic method.

The diameter of the discontinuous region is preferably 10 mm or less, more preferably 5 mm or less, still more preferably 3 mm or less, even more preferably 1 mm or less, still more preferably 500 탆 or less, Or less, and even more preferably 50 m or less. When the discontinuous region is circular, the diameter is preferably 10 mm or less, more preferably 5 mm or less, still more preferably 3 mm or less, even more preferably 1 mm or less, More preferably 100 탆 or less, still more preferably 50 탆 or less. In the case where the discontinuous region is non-circular, it is preferable that the area circle equivalent diameter is 10 mm or less, preferably 5 mm or less, more preferably 3 mm or less, even more preferably 1 mm or less, More preferably 100 μm or less, still more preferably 50 μm or less.

It is preferable that the surface of the laminate for a glass sheet of the present invention does not have a silicon-containing discontinuous region having a diameter exceeding 10 mm.

In the above case, the silicon-containing discontinuous region on the surface of the laminate may be coated with, for example, a coloring agent or a coloring agent having affinity for silicon on the surface of the laminate and having no affinity (typically hydrophobic) Or a coloring agent or a coloring agent having affinity with the ground and having no affinity with silicon (typically, hydrophilic) is applied to the surface of the green sheet, Can be determined by measuring a non-coloring area or a non-coloring area on the surface.

In the laminated paper for a glass plate of the present invention, the content of silicon contained in the laminated paper is limited to not more than 0.5 ppm based on the weight of the laminated paper, and the number of silicon-containing discontinuous areas having a diameter of 30 탆 or more on one surface When the difference in the number of silicon-containing discontinuous regions having a diameter of 30 占 퐉 or more on the other surface is within 5 pieces / 1000 m2, the content of the silicon nitride for the glass sheet of the present invention is small even for silicon. Variation in the abundance of the silicon-containing discontinuous region of the glass sheet is suppressed. Accordingly, the physical state of silicon on the front and back surfaces of the glass sheet is suppressed. Thus, in the above case, the possibility that the talc becomes a composite with silicon and becomes a silicon-containing foreign matter can be reduced, and even if a silicon-containing foreign matter is generated, the amount of the foreign substance existing is small and, There is no significant difference. Therefore, in the above case, all of the front and back surfaces of the laminated paper for a glass sheet of the present invention may be brought into contact with the glass plate.

The thickness of the laminate for a glass plate of the present invention is preferably 20 to 200 占 퐉, more preferably 30 to 150 占 퐉, still more preferably 40 to 200 占 퐉. In this manner, by making the laminate relatively thin, the difference in the physical state of the front and back of the laminated paper can be further suppressed.

The basis weight of the laminate for a glass plate of the present invention is preferably 20 to 80 g / m 2, more preferably 25 to 70 g / m 2, still more preferably 30 to 60 g / m 2.

The average grain size (MMD) of the friction coefficient of the surface of the glass sheet according to the present invention is preferably 0.022 or less, more preferably 0.020 or less, more preferably 0.019 or less, still more preferably 0.018 or less, Or less. The MMD was subjected to a friction tester (KES-SE, manufactured by Kato Tech Co., Ltd.), to which a 10 mm-square rub of a bundle of piano wire having a diameter of 0.5 mm was fixed to a paper surface with a tension of 20 g / And the average deviation value of the friction coefficient measured by moving 2 cm at a sample moving speed of 0.1 cm / sec in the same direction as the direction in which the tensile force is applied. When this MMD is large, it means that the coefficient of friction of the paper largely fluctuates according to the position of the paper surface, and micro-irregularities on the surface of the paper are increased. By forming fine irregularities on the surface of the laminate as described above, the coefficient of friction between the surface of the glass plate and the surface of the laminate becomes small, and the removing operation when the laminate is removed from the surface of the glass plate is facilitated. When the MMD exceeds 0.022, minute irregularities on the surface of the papers are increased and the papermaking is increased, which is not preferable. The MMD is preferably, for example, from 0.001 to 0.022, more preferably from 0.002 to 0.020, and still more preferably from 0.004 to 0.019.

The laminate for a glass sheet of the present invention may contain short fibers having a fiber length of 200 μm or less. However, since the short fibers may attract foreign matter, the content of the short fibers is preferably 10.5 wt% Or less, more preferably 10.0 wt% or less, even more preferably 9.5 wt% or less, and particularly preferably 9.0 wt% or less. Here, " fiber length " does not mean average fiber length. Therefore, all of the short fibers having a fiber length of 200 mu m or less have a fiber length of 200 mu m or less. In other words, the maximum fiber length of the short fibers is 200 mu m or less. Here, the fiber length refers to the length of the fiber when the fiber is straightly extended.

The average fiber diameter of the short fibers is preferably 10 탆 to 50 탆, more preferably 12 탆 to 40 탆, still more preferably 15 탆 to 30 탆.

The term " average fiber diameter " is used herein to mean that a plurality of points on the surface of the laminate for a glass plate are magnified and observed by an electron microscope, a predetermined number of fibers are randomly selected from each electron microscopic image, And the average fiber diameter obtained by averaging. The number of selected fibers is 100 or more, preferably 150 or more, more preferably 200 or more, and even more preferably 300 or more.

The abundance of the short fibers on the surface of the laminate for a glass sheet of the present invention is preferably 300 to 850 / cm 2, more preferably 330 to 800 / cm 2, and more preferably 350 to 750 / Is more preferable. When the abundance of the short fibers is relatively small, the amount of foreign matter attracted by the short fibers can be reduced.

In the laminate for a glass sheet of the present invention, the difference between the abundance of the staple fibers on one surface and the abundance of the staple fibers on the other surface depends on the abundance of the abundance of the staple fibers on the other surface More preferably 15% or less, more preferably 12% or less, still more preferably 10% or less. That is, in the laminating sheet for a glass sheet of the present invention, it is preferable that the abundance of staple fibers on one surface does not vary greatly from the abundance of staple fibers on the other surface to the above specific range. Here, the " abundance amount " means the number of the short fibers per unit area of the surface of the laminate. For example, a plurality of points on the surface of the laminate for a glass plate are observed by an electron microscope, Can be determined by averaging the number of short staple fibers per unit area. It is also possible to determine the number of the fibers per unit area of the short fibers of 200 占 퐉 or less from the fiber rubbing down the surface of the fiberglass with a sheet or the like with a predetermined area downward. It is also possible to make two sheets of very thin paper by dividing the laminate in the center in the thickness direction and making each paper slurry and measuring the number of short fibers of 200 mu m or less in the slurry. Alternatively, the abundance of the short fibers can be determined by thoroughly washing the surface of the laminate for a glass plate with water and providing the dropped fibers to a fiber length measuring instrument.

The laminate for a glass plate of the present invention can be produced on the basis of a conventional method such as a papermaking process.

A second aspect of the present invention is a method for producing a laminate for a glass plate,

A slurry preparation process for preparing a slurry of wood pulp,

A sheet forming step of forming the slurry into a sheet form,

A wet sheet preparation step of dehydrating the sheet to form a wet sheet,

And a drying step of drying the wet paper to obtain the laminated paper,

And dewatering is carried out from both sides of the sheet-like slurry in the wetland preparing step.

In the slurry preparing step, a slurry of wood pulp can be prepared by a conventionally known method. For example, in the slurry preparation step, the cellulose fiber constituting the wood pulp is understood to prepare an aqueous suspension to prepare a slurry.

If necessary, the slurry may further contain additives such as an adhesive, an anti-fogging agent, a defoaming agent, a filler, a wet strength agent, a dry strength agent, a sizing agent, a colorant, a fixing agent, A slime control agent and the like can be added. In addition, when these drugs are added, it is preferable to pay close attention so that insects, dust, etc. are not mixed.

Generally, wood pulp and lumber often contain talc. This is because talc is often used as a pitch control agent in the production process of wood pulp and lumber. On the other hand, talc is used not only as a pitch control agent but also as a filler and a pigment for paper coating, and also has an effect of improving the whiteness of the paper and improving the printing property.

In the second embodiment of the present invention, a non-talc pitch control agent, a filler, a pigment and the like may be used in order to make the ratio of the talc present on one surface of the resultant laminate to 10/100 m 2 or less.

Further, in general, wood pulp and lumber often contain silicon. This is because the silicon-based defoaming agent is often used as a defoaming agent used for preventing the deterioration of the cleaning ability due to the generation of bubbles in the manufacturing process of the wood pulp and the lumber, particularly in the cleaning process. Remain. The silicone antifoaming agent is produced, for example, by mixing a mixture of silicone oil and hydrophobic silica with modified silicone, a surfactant, and the like.

Therefore, when the content of silicon contained in the glass sheet laminate is reduced to 0.5 ppm or less, when a defoaming agent is used, it is preferable to use a non-silicone defoaming agent as the defoaming agent. Further, it is preferable to use wood pulp obtained by using a non-silicone antifoaming agent.

When the slurry is prepared, the strength of the stratum corneum can be expected to increase by advancing the pulp of the wood pulp. However, if the amount of fine fibers is increased by advancing the beating, there is a possibility that a foreign matter may be attracted or a paper powder may be generated while being used as a lumber. Therefore, it is not preferable to advance the degree of beating more than necessary. The degree of beating in the present invention is preferably 300 to 650 ml c.s.f.

In the step of forming a sheet in which the slurry is formed into a sheet, a sheet can be formed by a conventionally known method. For example, the slurry may be discharged onto a planar wire (for example, a paper machine), or the sheet may be taken out of the slurry with a wire wound around a cylindrical cylinder (for example, Can be obtained.

In the second aspect of the present invention, dehydration is performed from both sides of the sheet in the wet paper making step of dehydrating the sheet to form the wet paper. Thus, the talc included in the sheet is effectively removed from both sides of the sheet. The difference between the ratio of the presence of the talc on one surface and the ratio of the presence of the talc on the other surface of the laminate for a glass sheet obtained by the second aspect of the present invention can be set within 5 pieces / 100 m 2.

Further, in the wet sheet preparation step of dehydrating the sheet to form the wet sheet, dehydration is performed from both sides of the sheet, whereby the silicon-containing foreign substances contained in the sheet can be effectively removed from both sides of the sheet. Therefore, the difference in the number of silicon-containing discontinuous regions having a diameter of 30 占 퐉 or more on one surface of the laminate for a glass plate obtained by the second aspect of the present invention and the number of silicon-containing discontinuous regions having a diameter of 30 占 퐉 or more on one surface is 5/1000 M2. ≪ / RTI >

The method of dewatering is optional, and conventionally known methods can be used. For example, the sheet can be dewatered by pressing it with a roll. However, in order to effectively remove the talc, it is preferable to perform the dehydration by suction.

In the step of dewatering from both sides of the sheet, for example, the sheet extending in the horizontal direction may be sucked and dewatered by the suction device in the vertical direction with the net sandwiched therebetween. However, There is a difference between the suction force toward the lower direction and the suction force toward the lower side, and there is a possibility that the talc is more likely to remain on the sheet surface that is sucked upward than the sheet surface on the side to be sucked down. Therefore, It is preferable that the elongated sheet is sucked in the left and right direction by sandwiching the net therebetween to be dewatered. In this case, it is preferable to keep the moving direction of the wet paper so as to be inclined within 30 占 from the vertical direction or the vertical direction.

It is preferable that the difference between the dehydration rate of the suction on one surface of the sheet and the dehydration rate of the suction on the other surface is 10% or less of the dehydration rate of the suction on the other surface. That is, in the method for producing a laminated paper for a glass sheet of the present invention, it is preferable that the suction from both sides of the sheet is performed with substantially the same suction force.

The sheet forming step and the wet paper making step may be carried out separately using separate apparatuses, but they may be carried out continuously or partly in duplicate in the same apparatus. For example, in a wire part of a paper machine, the slurry may be placed on a wire (net) to form a sheet, and dehydrated to form a wet paper.

In the drying step, the wet paper is dried by a conventionally known method using a dryer roll or the like to obtain the laminate.

In order to further remove the talc remaining on the surface of the joint, it is preferable that the method for manufacturing a joint for a glass sheet of the present invention further includes an additional suction process for further sucking both sides of the joint after the drying process.

On the other hand, calendering, super calendering, soft nip calendering, embossing and the like may be performed during the papermaking and / or papermaking of the lumber for the glass plate. By the processing, the surface property and the thickness can be adjusted.

By the production method of the second aspect of the present invention, the laminated sheet for a glass plate of the first aspect of the present invention can be efficiently produced.

The laminate for a glass plate of the present invention is inserted between glass plates and used. For example, the above-mentioned glass sheet laminate is inserted between a plurality of glass plates, typically one sheet, and the laminate as a whole is an object of storage and transportation. Alternatively, the glass plate alone or the laminate may be packed using the laminated paper for a glass plate of the present invention. Therefore, the present invention has aspects of a method of protecting a glass plate including a step of arranging (particularly, inserting) the laminated paper for the glass sheet between glass sheets.

The glass plate is not particularly limited, but is preferably a glass plate for a flat panel display such as a plasma display panel, a liquid crystal display panel (in particular, a TFT liquid crystal display panel), and an organic EL display panel. Fine electrodes, partition walls, and the like are formed on the surface of the glass plate for flat panel display. However, since the use of the glass plate laminate of the present invention suppresses or prevents the transfer of microscopic foreign matter, which is a problem for the glass plate, Even if electrodes, barrier ribs, and the like are formed, the problem caused by the foreign matter can be suppressed or avoided, and consequently defects of the display can be suppressed or avoided.

Particularly, with the increase of the size of the display, the size and weight of the glass plate for flat panel display are increasing, but the laminating sheet for glass plate of the present invention can well protect the surface of such large or heavy glass plate. Particularly, since the content of the talc-based foreign material in the laminated paper for the glass plate of the present invention is remarkably small, the transfer of the foreign matter to the glass plate is suppressed or avoided even if it is pressed by the large- Therefore, the laminate for a glass plate of the present invention can be preferably used for a glass plate for a flat panel display in which cleanliness of the surface is particularly required.

Example

Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples, but the scope of the present invention is not limited to the examples.

[Measurement of talc]

The laminate for the glass plate was cut to 1 m < 2 >, and one side of the paper was thoroughly rinsed with demineralized ionized water. The washed aqueous solution was recovered and filtered through a polycarbonate membrane filter (MILLIPORE, pore size 0.8 mu m) to obtain a residue. This residue was observed using an electron microscope, and the number of talcs on the surface of the glass liner was measured by EDS analysis of foreign substances having a particle diameter of 1 占 퐉 or more.

[Transcription test method for glass plate (transportation test)]

A foaming urethane is laid on a glass surface of an L-shaped support on which an angle of 75 degrees is given to the aluminum, and a surface for placing the glass plate in the vertical direction and a back surface extending in the vertical direction from the rear end of the placement surface are formed. 120 glass plates of 680 mm x 880 mm x 0.7 mm and glass sheets for glass plates were inserted between each glass plate and leaned so as to be parallel to the back surface and the belt- Over the entire circumference to fix the glass plate. In the above-described mounting table, the entire surface was covered with packing material to prevent mixing of dust and dirt from the outside. After that, we carried out transportation test by truck. The transport test conditions were tested at a transport distance of 1000 km (stored for 5 days in an environment of 40 ° C × 95% RH during transportation).

[Example 1]

An apparatus for producing conifer bleached kraft pulp comprising a steaming step, a washing step, an oxygen delignification step, and a multi-stage bleaching step using chlorine dioxide and hydrogen peroxide, wherein the non-talc surfactant Quot; Miracle Pitch Con 500 " (manufactured by Katayama Narco Co., Ltd.) was used. In this way, softwood bleached kraft pulp using a non-talc-based surfactant was obtained in the manufacturing process. 100 parts by mass of this was prepared. To understand this, a polymaleimide (trade name: Polystron 1250, manufactured by Arakawa Chemical Industries, Ltd.) as an index hardening agent was added in an amount of 0.2 parts by mass based on the total pulp mass to 0.4 A pulp slurry having a concentration of 1 wt% was formed. This was ground using a paper making machine equipped with a top former on a wire part, and dehydrated from both sides of the wet paper by an on top former to obtain a laminated paper for a glass sheet having a basis weight of 55 g / m 2.

[Comparative Example 1]

A laminate for a glass plate having a basis weight of 55 g / m < 2 > was obtained in the same manner as in Example 1 except that the on top former was not used.

[Comparative Example 2]

A laminate for a glass sheet having a basis weight of 55 g / m 2 was obtained in the same manner as in Example 1, except that a talc-based pitch control agent "MISTRON VAPOR" (manufactured by Japan Mistron Co., Ltd.) was used as a surfactant.

The presence ratio of talc on the surface of the laminates for the glass plates of the examples and comparative examples was determined. As a result, the number of one side of Example 1 was 7/100 m2 and the other side was 11/100 m2. In Comparative Example 1, the number of the surface was 7/100 m2 and the other side was 17/100 m2. In Comparative Example 2, one side was 87/100 m2 and the other side was 153/100 m2. The transfer of the glass sheet for the glass sheet obtained in the examples and the comparative example was confirmed by a transport test. As a result, at the time of forming the array of the liquid crystal panel using the glass sheet using the joint paper of Example 1, disconnection of the color film was not confirmed . On the other hand, disconnection of the color film was confirmed at the time of forming the array of the liquid crystal panel using the glass plate using the laminated paper for the glass plate of Comparative Example 1 and Comparative Example 2. [

Claims (15)

Claims [1] A laminating sheet for a glass plate using wood pulp as a raw material,
The presence ratio of talc on one surface is 10 / 100m 2 or less,
Wherein the difference between the ratio of the presence of talc on one surface and the ratio of the presence of talc on the other surface is within 5 / 100m2. The method according to claim 1,
Wherein said talc has an average particle diameter of 1 to 10 占 퐉. 3. The method according to claim 1 or 2,
Wherein the talc is complexed with a hydrophobic substance. The method of claim 3,
Wherein the average particle size of the combined form of the talc and the hydrophobic substance is 30 占 퐉 or more. 5. The method of claim 4,
Wherein the hydrophobic substance comprises silicon. 6. The method according to any one of claims 1 to 5,
And a thickness of 20 to 200 mu m. 7. The method according to any one of claims 1 to 6,
Wherein the mean deviation (MMD) of the coefficient of friction of the surface by the KES method is 0.022 or less. 8. The method according to any one of claims 1 to 7,
Wherein the glass plate is for display. 9. The method of claim 8,
Wherein the display is a TFT liquid crystal display or an organic EL display. A laminate comprising a laminate for a glass plate and a glass plate according to any one of claims 1 to 9. A method of protecting a glass plate comprising the step of disposing a laminate for a glass plate according to any one of claims 1 to 9 between glass plates. 10. A method for producing a laminated sheet for a glass plate according to any one of claims 1 to 9,
A slurry preparation process for preparing a slurry of wood pulp,
A sheet forming step of forming the slurry into a sheet form,
A wet sheet preparation step of dehydrating the sheet to form a wet sheet,
And a drying step of drying the wet paper to obtain the laminated paper,
And dewatering is performed from both sides of the sheet in the wet paper making step. 13. The method of claim 12,
Wherein the dehydration is performed by suction. 14. The method of claim 13,
Wherein the difference between the dehydration rate of the suction on one surface of the sheet and the dehydration rate of the suction on the other surface is 10% or less of the dehydration rate of the suction on the other surface. The method according to claim 13 or 14,
And further sucking both sides of the stock after the drying step.