WO2016084547A1 - ガラス板合紙用木材パルプ及びガラス板用合紙 - Google Patents
ガラス板合紙用木材パルプ及びガラス板用合紙 Download PDFInfo
- Publication number
- WO2016084547A1 WO2016084547A1 PCT/JP2015/080591 JP2015080591W WO2016084547A1 WO 2016084547 A1 WO2016084547 A1 WO 2016084547A1 JP 2015080591 W JP2015080591 W JP 2015080591W WO 2016084547 A1 WO2016084547 A1 WO 2016084547A1
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- WO
- WIPO (PCT)
- Prior art keywords
- less
- wood pulp
- glass
- interleaving paper
- glass plate
- Prior art date
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/16—Pure paper, i.e. paper lacking or having low content of contaminants
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
- C03B40/02—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it by lubrication; Use of materials as release or lubricating compositions
- C03B40/033—Means for preventing adhesion between glass and glass
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/59—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
Definitions
- the paper for packaging the glass plates In the process of laminating and storing and transporting a plurality of glass plates for flat panel displays such as liquid crystal displays, plasma displays, organic electroluminescence (organic EL) displays, etc., the paper for packaging the glass plates, and The present invention relates to paper sandwiched between glass plates and wood pulp used in the production of these papers.
- flat panel displays such as liquid crystal displays, plasma displays, organic electroluminescence (organic EL) displays, etc.
- Glass plates for flat panel displays are used for high-definition displays compared to general architectural window glass plates, vehicle window glass plates, etc., so impurities on the glass surface are as much as possible on the glass surface. It is required to have a clean surface, and to have excellent flatness for high-speed response and widening of the viewing angle.
- Patent Document 1 discloses a technique for forming a fluorine coating film on the surface of a slip sheet.
- Patent Document 2 includes a paper sheet in which a polyethylene resin foam sheet and a polyethylene resin film are bonded
- Patent Document 3 includes a paper made of pulp containing 50 mass% or more of exposed chemical pulp.
- Patent Document 4 defines the amount of resin in the paper and considers contamination of the glass surface.
- a glass sheet plywood using the prepared raw materials is disclosed.
- Patent Document 5 describes that the amount of silicone contained in the interleaf paper for glass plate is limited.
- the present invention can reduce the contamination of the glass surface to a practically no problem level for glass plates used as substrate materials for flat panel displays that require high cleanliness and scratch quality.
- An object of the present invention is to provide a slip sheet and wood pulp for the slip sheet.
- the color filter substrate is made by forming a thin film such as a semiconductor film, ITO film (transparent conductive film), insulating film, aluminum metal film, etc. on a glass plate by sputtering or vacuum evaporation, but it is a contaminant on the glass plate surface. This is because a circuit pattern formed from a thin film is disconnected or a short circuit occurs due to a defect in the insulating film.
- a photolithography pattern is formed on a glass plate.
- An organic EL display is manufactured by forming a thin film such as an ITO anode, an organic light emitting layer, or a cathode on a glass substrate by sputtering, vapor deposition, printing, etc., and therefore does not emit light when a foreign substance that obstructs the thin film exists on the glass substrate surface. Problems arise.
- the cause of contamination of such a glass plate has been difficult to identify, but it has been proved by the present inventors that the cause is a hydrophobic substance such as silicone contained in the slip sheet for glass plate.
- the total amount of hydrophobic substances in the wood pulp used for the production of glass sheet interleaf should be kept below a certain level, and the glass sheet interleaf It is conceivable that the total amount of the hydrophobic substance is kept below a certain level. However, it is sometimes difficult to reduce the contamination of the glass plate surface derived from the hydrophobic substance to a practically no problem level only by limiting the total amount of the hydrophobic substance.
- the present inventors have found that a hydrophobic substance that appears on the surface of the glass sheet interleaf or is included in the wood pulp used for the production of the glass sheet interleaving paper can be a problem.
- the inventors have found that the above problem can be solved by keeping the number below a certain level, and have completed the present invention.
- Hydrophobic substances repel colorants or color formers, so when a colorant or color former is applied to paper prepared from wood pulp for glass board interleaving paper or glass board interleaving paper, the surface of the paper or interleaf paper
- the hydrophobic substance present in the substrate repels the colorant or color former, and the region where the hydrophobic substance exists does not color or color. Therefore, in the present invention, a hydrophobic substance contained in the wood pulp for glass board interleaving paper or scattered on the surface of the glass board interleaving paper, or inspection paper prepared from the wood pulp, or It can be identified based on the presence or absence of coloring or coloring on the surface of the glass sheet interleaf.
- the contamination of the surface of the glass plate derived from the hydrophobic substance is practically free of problems. It can be reduced to.
- the first aspect of the present invention is a wood pulp for glass board interleaving paper, which is a non-colored or non-colored discontinuity having a diameter of 30 ⁇ m or more present on the surface of the wood pulp after applying the colorant or color former region 1000/1000 m 2 or less, preferably 500/1000 m 2 or less, more preferably 300/1000 m 2 or less, still more preferably 150/1000 m 2 or less, even more preferably at 130 pieces / 1000 m 2 or less It relates to a wood pulp for a certain glass board plywood.
- the second aspect of the present invention is wood pulp for glass board interleaving paper, and a coloring agent or color former is added to a handsheet having a thickness of 230 ⁇ m prepared from the wood pulp by a method according to JIS P 8222.
- a coloring agent or color former is added to a handsheet having a thickness of 230 ⁇ m prepared from the wood pulp by a method according to JIS P 8222.
- preferably non-colored or non-colored discontinuous regions of 30 ⁇ m or more diameter on the surface of the handsheets after application is 50/1000 m 2 or less, more preferably 30 pieces / 1000 m 2 or less relates to 20 / is preferably more than that 1000 m 2 or less, 10 pieces / 1000 m glass plate if wood pulp for paper 2 or less.
- the colorant is preferably an aqueous dye.
- the discontinuous region may include a hydrophobic material.
- the hydrophobic material may include silicone.
- the silicone is preferably silicone oil.
- the silicone oil is preferably dimethylpolysiloxane.
- the glass plate is preferably used for a display, and in particular, the display is preferably a TFT liquid crystal display or an organic EL display.
- the third aspect of the present invention is a glass sheet interleaving paper made from wood pulp, which is a non-colored or non-colored discontinuous region having a diameter of 30 ⁇ m or more present on the surface after application of the colorant or color former. Is 15 pieces / 1000 m 2 or less, preferably 12 pieces / 1000 m 2 or less, more preferably 10 pieces / 1000 m 2 or less, and even more preferably 8 pieces / 1000 m 2 or less.
- the colorant is preferably an aqueous dye.
- the discontinuous region may include a hydrophobic substance.
- the hydrophobic material may include silicone.
- the silicone is preferably silicone oil.
- the silicone oil is preferably dimethylpolysiloxane.
- the glass plate is preferably used for a display, and in particular, the display is preferably a TFT liquid crystal display or an organic EL display.
- this invention is the glass board interleaving paper containing the said wood pulp of the 1st or 2nd aspect of this invention, and / or the said glass board interleaving paper of the 3rd aspect of this invention, and a glass plate It also relates to the laminate.
- the present invention also relates to the use of the wood pulp according to the first or second aspect of the present invention for the production of glass sheet interleaving paper, particularly the glass sheet interleaving paper according to the third aspect of the present invention.
- this invention relates also to the protection method of the glass plate including the process of arrange
- the fourth aspect of the present invention is: Applying a colorant or color former to wood pulp for glass board or paper for glass board; A step of measuring the number of non-colored or non-coloring discontinuous regions having a diameter of 30 ⁇ m or more on the surface of the wood pulp for glass plate interleaving paper or the glass sheet interleaving paper after application, Determining the abundance ratio of the non-colored or non-coloring discontinuous regions from the number of the non-colored or non-coloring discontinuous regions and the surface area of the wood pulp for glass plate interleaving paper or the paper for glass plate, Wherein the existing ratio of the non-colored or non-colored discontinuous area is 1000/1000 m 2 or less, preferably 500/1000 m 2 or less, more preferably 300/1000 m 2 or less, even more preferably 150/1000 m 2 or less Even more preferably, 130/1000 m 2 or less of wood pulp for glass board plywood or the non-colored or non-coloring discontinuous region is present at 15/1000 m 2 or less, preferably 12
- the glass plate interleaf made of wood pulp of the present invention and the glass plate interleaf of the present invention can suppress or avoid transfer of hydrophobic substances such as silicone to the glass plate.
- hydrophobic substances such as silicone
- the total amount of the hydrophobic substance in the wood pulp used for the production of the glass sheet interleaf, or the total amount of the hydrophobic substance in the glass sheet interleaf not less than a certain amount, Since the number of hydrophobic substance regions that can be problematic and locally exist on the surface of wood pulp or glass sheet slip sheet is kept below a certain level, each spot of hydrophobic substance that may be transferred to the glass sheet It is possible to control at a level, and it is possible to reduce the contamination of the glass plate surface derived from the hydrophobic substance to a practically no problem level.
- the hydrophobic material region existing on the surface of the wood pulp itself for glass board interleaving paper, the inspection paper prepared from the wood pulp or the interleaving paper for glass board, the wood pulp, the inspection paper, or the interlining material Since it can be easily identified as a non-colored or non-colored region by treatment with a paper colorant or color former, by measuring the number of the regions, the wood pulp for glass board plywood that meets the selection criteria or Glass sheet interleaving paper can be easily selected. Therefore, the inspection method of the present invention can be easily implemented, for example, visually.
- hydrophobic substances such as silicone in the interleaving paper tend to be transferred to the glass plate, and in particular, the number of hydrophobic material regions having a diameter of 30 ⁇ m or more present on the surface is 1000.
- a slip sheet made of wood pulp exceeding 1,000 pieces / 1000 m 2 or a slip sheet having a hydrophobic substance region with a diameter of 30 ⁇ m or more existing on the surface exceeds 15 pieces / 1000 m 2 is used for the glass plate, it is transferred to the glass plate. It has now been clarified that the amount of hydrophobic substances to be increased increases, resulting in problems in panel formation.
- one form of the wood pulp for paperboard of the present invention is a non-colored or non-colored discontinuous region having a diameter of 30 ⁇ m or more present on the surface of the wood pulp after applying the colorant or color former.
- the quality is 1000 pieces / 1000 m 2 or less.
- regions which can be a problem substantially of hydrophobic substances, such as silicone which exists in the surface of the glass board interleaving paper which consists of the wood pulp of this invention can be 15 pieces / 1000 m ⁇ 2 > or less.
- the other form of the wood pulp for glass board interleaving paper of this invention is after applying a coloring agent or a coloring agent to the 230-micrometer-thick handsheet prepared by the method based on JISP8222 using the said wood pulp.
- the quality of the non-colored or non-coloring discontinuous region having a diameter of 30 ⁇ m or more present on the surface of the handsheet is 50/1000 m 2 or less.
- the glass sheet slip sheet of the present invention is a glass slip sheet made of wood pulp, and is a non-colored or non-color-discontinuous region having a diameter of 30 ⁇ m or more present on the surface after application of the colorant or color former. Is 15 pieces / 1000 m 2 or less.
- the “surface” of the interleaving paper means any outer surface of the interleaving paper.
- the colorant or color former may be applied only to one outer surface of the front or back side of the slip sheet, or the colorant or color former may be applied to both the front and back outer surfaces.
- a colorant or a colorant may be applied to the entire outer surface of the front and / or back of the interleaf, or a colorant or colorant on a part of the outer surface of the front and / or back of the interleaf. May be applied.
- the form of the wood pulp for glass plate interleaving paper of the present invention is not particularly limited, and can take any form such as a sheet form, a block form or a flake form.
- the sheet-like pulp can be obtained using, for example, a pulp machine having four steps of wire part, press part, dry part, and finishing.
- pulp fiber is made using a long mesh or a vacuum filter, and in the press part, it is dehydrated using a roll press.
- the dry part it is dried with a cylinder dryer or a fract dryer, and finally both ends of the sheet pulp are cut off and wound up on a roll.
- the block-like pulp can be obtained, for example, by laminating the sheet-like pulp, and the flake-like pulp can be obtained, for example, by pulverizing the sheet-like pulp.
- the “surface” of wood pulp means an arbitrary outer surface of wood pulp.
- the “surface” of wood pulp means an arbitrary outer surface of wood pulp.
- the block-like wood pulp when the block is a hexahedron, it means any outer surface, and at least a part of the outer surface including the six outer surfaces (front surface, back surface and side surface) means. Therefore, in the case of sheet-like wood pulp, the colorant or color former may be applied only to the outer surface of one of the front and back, or the colorant or colorant may be applied to both the front and back outer surfaces. You may apply.
- a colorant or a coloring agent may be applied to the entire outer surface of the front and / or back of the sheet-like wood pulp, or a part of the outer surface of the front and / or back of the sheet-like wood pulp.
- a colorant or a color former may be applied to the surface.
- 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 pulp is preferably 400 to 1300 g / m 2 , more preferably 500 to 1200 g / m 2 , still more preferably 500 to 1100 g / m 2 , and 500 to 1000 g. / M 2 is more preferable, and 700 to 1000 g / m 2 is even more preferable.
- the non-colored or non-coloring discontinuous region having a diameter of 30 ⁇ m or more present on the surface after applying the coloring agent or the coloring agent to the wood pulp for glass board interleaving paper of the present invention is preferably 500 pieces / 1000 m 2 or less, 300 Pieces / 1000 m 2 or less are more preferred, 150 pieces / 1000 m 2 or less are even more preferred, 130 pieces / 1000 m 2 or less are even more preferred, 100 pieces / 1000 m 2 or less are even more preferred, and 50 pieces / 1000 m 2 are particularly preferred preferable.
- the non-colored or the number of non-color discontinuous regions of diameter is 30/1000 m 2 or less, more preferably 20 pieces / 1000 m 2 or less, further to be 10 or / 1000 m 2 or less More preferably, 5 pieces / 1000 m 2 or less, still more preferably 3 pieces / 1000 m 2 or less, and particularly preferably 1 piece / 1000 m 2 or less.
- the number of the non-colored or non-colored discontinuous regions is preferably 10/10 kg or less, more preferably 6/10 kg or less, based on the weight of the wood pulp for glass board interleaving paper. More preferably, the number is 10 pieces per 10 kg or less, still more preferably 3 pieces / 10 kg or less, still more preferably 2 pieces / 10 kg or less, and particularly preferably 1 piece / 10 kg or less.
- the weight here refers to the weight of the air-dried pulp.
- Uncolored or the number of non-color discontinuous regions of the interleaf paper for the glass plate is preferably at 12/1000 m 2 or less, more preferably 10/1000 m 2 or less, eight / 1000 m 2 or less It is even more preferable, 5/1000 m 2 or less is still more preferable, 3/1000 m 2 or less is even more preferable, and 1/1000 m 2 or less is particularly preferable. Further, the number of the non-colored or non-colored discontinuous regions is preferably 4/10 kg or less, more preferably 3/10 kg or less, more preferably 2 / kg per weight of the glass sheet interleaf.
- the weight refers to the weight of the slip sheet containing 10% by weight of moisture.
- non-colored discontinuous region and “non-coloring discontinuous region” are regions that are not colored even when a colorant is applied, Further, it means that the region does not develop color even when a color former is applied, and that a certain non-colored or non-colored region is separated from other non-colored or non-colored regions. Therefore, there can be a plurality of non-colored or non-coloring discontinuous regions, and specifically, they can be scattered in the form of dots (dots) or spots (spots).
- the form of the non-colored or non-coloring discontinuous region is arbitrary, and may be various shapes such as a circle, an ellipse, and a square, but is preferably a circle or an ellipse.
- the “diameter” of the discontinuous region means an equivalent area circle diameter (a diameter of a circle having an area equal to the area of the discontinuous region).
- the diameter of the non-colored or non-coloring discontinuous region is preferably 25 ⁇ m or more, more preferably 20 ⁇ m or more, still more preferably 15 ⁇ m or more, still more preferably 10 ⁇ m or more, still more preferably 5 ⁇ m or more, and even more preferably 1 ⁇ m or more. , 0.5 ⁇ m or more is particularly preferable.
- the diameter is “diameter”.
- the equivalent area circle diameter (the diameter of a circle having an area equal to the area of the discontinuous region) is preferably 25 ⁇ m or more, preferably 20 ⁇ m or more, It is more preferably 15 ⁇ m or more, even more preferably 10 ⁇ m or more, still more preferably 5 ⁇ m or more, still more preferably 1 ⁇ m or more, and particularly preferably 0.55 m or more.
- the area of the non-colored or non-colored discontinuous region can be measured by, for example, microscopy.
- the diameter of the non-colored or non-colored discontinuous region is preferably 10 mm or less, more preferably 5 mm or less, still more preferably 3 mm or less, still more preferably 1 mm or less, still more preferably 500 ⁇ m or less, and even more preferably 100 ⁇ m or less. 50 ⁇ m or less is particularly preferable.
- the diameter is preferably 10 mm or less, more preferably 5 mm or less, still more preferably 3 mm or less, still more preferably 1 mm or less, and 500 ⁇ m. The following is still more preferable, 100 ⁇ m or less is even more preferable, and 50 ⁇ m or less is particularly preferable.
- the area circle equivalent diameter is preferably 10 mm or less, preferably 5 mm or less, more preferably 3 mm or less, still more preferably 1 mm or less, and 500 ⁇ m or less. Even more preferred is 100 ⁇ m or less, even more preferred is 50 ⁇ m or less.
- the non-colored or non-coloring discontinuous region having a diameter of more than 10 mm does not exist on the surface of the wood pulp for glass plate interleaf of the present invention and the surface of the paper for glass plate of the present invention.
- the colorant or color former preferably lacks affinity with a hydrophobic substance such as silicone. Accordingly, the colorant or color former is preferably hydrophilic.
- the colorant is not particularly limited as long as it can color wood pulp or slip paper, and for example, dyes, pigments, and mixtures thereof can be used.
- the dye is preferably hydrophilic and more preferably an aqueous dye.
- the mode of dyeing (coloring) with an aqueous dye is not particularly limited.
- Aqueous dyes are hydrophilic and can be dissolved in water. Any water-based dye can be used, and examples thereof include acid dyes, direct dyes, and basic dyes. Specific examples of the aqueous dye include C.I. I. (Color index) Direct black 9, 17, 19, 22, 32, 38, 51, 56, 62, 69, 71, 77, 80, 91, 94, 97, 105, 108, 112, 113, 114, 117, 118, 121, 122, 125, 132, 146, 154, 166, 168, 173, 199, C.I. I.
- any pigment can be used.
- the pigment inorganic pigments, organic pigments, and mixtures thereof can be used.
- the pigment is preferably hydrophilic and more preferably water-dispersible.
- inorganic pigments include titanium dioxide, zinc white (zinc oxide), iron oxide, chromium oxide, iron black, cobalt blue, alumina white, iron oxide yellow, viridian, zinc sulfide, lithopone, vermilion, cadmium red, yellow Lead, molybdate orange, zinc chromate, strontium chromate, white carbon, cray, talc, ultramarine, precipitated barium sulfate, barite powder, calcium carbonate, lead white, ferrocyanide (bituminous), phosphate (manganese violet), Examples thereof include carbon black.
- organic pigments examples include rhodamine lake, methyl violet lake, quinoline yellow lake, malachite green lake, alizarin lake, carmine 6B, lake red C, disazo yellow, lake red 4R, chromophthal yellow 3G, chromophthalscarlet RN, nickel.
- Azo Yellow, Permanent Orange HL, Phthalocyanine Blue, Phthalocyanine Green, Flavanthrone Yellow, Thioindigo Bordeaux, Perrin Red, Dioxadone Violet, Quinacridone Red, Naphthol Yellow S, Pigrant Green B, Lumogen Yellow, Signal Red, Alkaline Blue, Aniline Black etc. are mentioned.
- the color former is not particularly limited as long as it has a property of coloring by stimulation such as electromagnetic wave irradiation and can color wood pulp or interleaf.
- a color former or chemical substance that develops color by electromagnetic wave irradiation can be used.
- Any color former that develops color when irradiated with electromagnetic waves can be used.
- a fluorescent color former that develops fluorescence by irradiation with ultraviolet rays, infrared rays, or the like is preferable.
- the fluorescent color former for example, the following can be used.
- Inorganic compounds such as Ca 2 B 5 O 3 Cl: Eu 2+ , CaWO 4 , ZnO: Zn 2 SiO 4 : Mn, Y 2 O 2 S: Eu, ZnS: Ag, YVO 4 : Eu, Alternatively, diaminostilbene-based C.I. I. 40600 Fluorescent Brightening Agent 30, C.I. I. 40620 Fluorescent Brightening Agent 32, C.I. I. 40605 FBA 34, C.I. I. 40630 FBA1, thiazole C.I. I. Organic compounds such as 49015 FBA 41.
- Any color former that develops color upon contact with a chemical substance can be used.
- the application of the colorant or color former may be carried out, for example, by applying a composition such as a solution or dispersion containing the colorant or color former to wood pulp, inspection paper or slip paper prepared from wood pulp. it can.
- wood pulp, inspection paper or slip paper prepared from wood pulp may be dipped in a composition such as a solution or dispersion containing a colorant or color former.
- a composition such as a solution or dispersion containing a colorant or color former.
- concentration of the colorant or color former in the composition is not particularly limited, but is preferably 0.001 to 20% by weight, more preferably 0.01 to 10% by weight, and 0.1 to 1% by weight. Is even more preferred.
- a colorant or a colorant is fixed on the surface of wood pulp, inspection paper or slip paper prepared from wood pulp, but when a hydrophobic substance is present on the surface of the wood pulp, inspection paper or slip paper Since the hydrophobic substance repels the colorant or color former, the area where the hydrophobic substance is present is not colored and becomes a “non-colored discontinuous area”, or the area where the hydrophobic substance exists is The color does not develop and becomes a “non-colored discontinuous region”.
- hydrophobic substances scattered on the surface of wood pulp, inspection paper or slip paper prepared from wood pulp are identified by the non-colored or non-color development region on the surface of the wood pulp, test paper or slip paper. be able to. The identification can be made visually and is easy.
- the non-colored or non-coloring discontinuous region preferably contains a hydrophobic substance.
- the hydrophobic substance is not particularly limited as long as it repels a colorant or a color former.
- the hydrophobic substance is preferably non-volatile, and includes aliphatic hydrocarbons, vegetable oils, animal oils, synthetic glycerides, fatty alcohols, fatty acids, fatty alcohols and / or esters of fatty acids, resins (except silicone), and More preferably, it is selected from the group consisting of silicones, and in particular, it is even more preferred that it contains or is silicone.
- Aliphatic hydrocarbons include, for example, linear or branched hydrocarbons, especially mineral oil (liquid paraffin, etc.), paraffin, petrolatum, ie petrolatum, naphthalene, etc .; hydrogenated polyisobutene, isoeicosane, polydecene, pearl reamer, etc. And polyisobutenes and decene / butene copolymers; and mixtures thereof.
- aliphatic hydrocarbons mention may also be made of linear or branched or optionally cyclic C 6 -C 16 lower alkanes. Examples that may be mentioned include hexane, undecane, dodecane, tridecane and isoparaffins such as isohexadecane and isodecane.
- vegetable oils include, for example, linseed oil, camellia oil, macadamia nut oil, sunflower oil, apricot oil, soybean oil, arara oil, hazelnut oil, corn oil, mink oil, olive oil, avocado oil, southern oil, castor oil , Safflower oil, jojoba oil, sunflower oil, almond oil, grape seed oil, sesame oil, soybean oil, peanut oil, and mixtures thereof.
- animal oils examples include squalene, perhydrosqualene, and squalane.
- Examples of synthetic glycerides include caprylic / capric triglycerides.
- Fatty acids should be in acidic form (ie, not in salt form to avoid soaping) and may be saturated or unsaturated and have 6 to 30 carbon atoms, especially 9 to 30 carbons. Contains atoms and is optionally substituted, in particular with one or more hydroxyl groups (especially 1 to 4). When the fatty acid is unsaturated, the compound can contain 1 to 3 conjugated or non-conjugated carbon-carbon double bonds.
- the fatty acid is selected from, for example, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid and isostearic acid.
- aliphatic alcohol as used herein means any saturated, linear or branched C 8 -C 30 alcohol, optionally with one or more hydroxyl groups ( In particular 1 to 4).
- C 12 -C 22 aliphatic alcohols are preferred, and C 16 -C 18 saturated aliphatic alcohols are more preferred.
- lauryl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, undecyl alcohol, myristyl alcohol, and mixtures thereof can be mentioned.
- esters of fatty acids and / or fatty alcohols are saturated or unsaturated, linear or branched C 1 -C 26 aliphatic mono- or polyacid esters, and saturated or unsaturated, linear Specific examples include C 1 -C 26 aliphatic monohydric alcohols or polyhydric alcohol esters, and the total number of carbon atoms in the ester is preferably 10 or more.
- Resin (excluding silicone) is not particularly limited as long as it is hydrophobic.
- the resin include thermoplastic resins such as polyolefin, polystyrene, poly (meth) acrylate, polyacrylamide, polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, polyester, polycarbonate, polyamide, polyimide, polyurethane, melamine resin, and urea resin. And the like, and a mixture thereof.
- Silicone includes silicone oil. Silicone oil is hydrophobic and its molecular structure may be cyclic, linear or branched. Kinematic viscosity at 25 ° C. of the silicone oil is usually in the range of 0.65 ⁇ 100,000mm 2 / s, it may be in the range of 0.65 ⁇ 10,000mm 2 / s.
- silicone oils examples include linear organopolysiloxanes, cyclic organopolysiloxanes, and branched organopolysiloxanes.
- Examples of the linear organopolysiloxane, cyclic organopolysiloxane, and branched organopolysiloxane include the following general 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) (Where Each R 1 is independently a hydrogen atom, a hydroxyl group, or a group selected from a group represented by a substituted or unsubstituted monovalent hydrocarbon group or an alkoxy group; a is an integer of 0 to 1000; b is an integer of 3 to 100, c is an integer of 1 to 4, preferably an integer of 2 to 4)
- the organopolysiloxane represented by these is mentioned.
- the substituted or unsubstituted monovalent hydrocarbon group is typically a substituted or unsubstituted one having 1 to 30 carbon atoms, preferably 1 to 10 carbon atoms, more preferably 1 to 4 carbon atoms.
- a saturated saturated hydrocarbon group a substituted or unsubstituted monovalent unsaturated hydrocarbon group having 2 to 30 carbon atoms, preferably 2 to 10 carbon atoms, more preferably 2 to 6 carbon atoms;
- 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 a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group.
- a linear or branched alkyl group such as a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group and a decyl group, and a cycloalkyl group such as a cyclopentyl group, a cyclohexyl group, a cycloheptyl group and a cyclooctyl group.
- a cycloalkyl group such as a cyclopentyl group, a cyclohexyl group, a cycloheptyl group and a cyclooctyl group.
- Examples of the monovalent unsaturated hydrocarbon group having 2 to 30 carbon atoms include a vinyl group, 1-propenyl group, allyl group, isopropenyl group, 1-butenyl, 2-butenyl group, pentenyl group, hexenyl group and the like.
- a linear or branched alkenyl group such as a cyclopentenyl group and a cyclohexenyl group; a cycloalkenylalkyl group such as a cyclopentenylethyl group, a cyclohexenylethyl group and a cyclohexenylpropyl group; and an ethynyl group and a propargyl group And alkynyl groups such as groups.
- Examples of the monovalent aromatic hydrocarbon group having 6 to 30 carbon atoms include aryl groups such as phenyl, tolyl, xylyl, and mesityl groups.
- a phenyl group is preferred.
- the aromatic hydrocarbon group includes a group in which an aromatic hydrocarbon and an aliphatic saturated hydrocarbon are combined in addition to a group consisting of only an aromatic hydrocarbon.
- Examples of the group in which an aromatic hydrocarbon and a saturated hydrocarbon are combined include an aralkyl group such as a benzyl group or a phenethyl group.
- the hydrogen atom on the monovalent hydrocarbon group may be substituted with one or more substituents, and examples of the substituent include a halogen atom (a fluorine atom, a chlorine atom, a bromine atom and an iodine atom), a hydroxyl group , Carbinol group, epoxy group, glycidyl group, acyl group, carboxyl group, amino group, methacryl group, mercapto group, amide group, oxyalkylene group and the like.
- a halogen atom a fluorine atom, a chlorine atom, a bromine atom and an iodine atom
- a hydroxyl group Carbinol group, epoxy group, glycidyl group, acyl group, carboxyl group, amino group, methacryl group, mercapto group, amide group, oxyalkylene group and the like.
- alkoxy group examples 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.
- the linear organopolysiloxane may be a trimethylsiloxy group-blocked dimethylpolysiloxane having a molecular chain at both ends (a low-viscosity dimethylsilicone such as 2 mPa ⁇ s or 6 mPa ⁇ s to a high viscosity such as 1 million mPa ⁇ s).
- a low-viscosity dimethylsilicone such as 2 mPa ⁇ s or 6 mPa ⁇ s to a high viscosity such as 1 million mPa ⁇ s.
- Organohydrogenpolysiloxane trimethylsiloxy group-capped methylphenyl polysiloxane with both molecular chains, trimethylsiloxy group-capped dimethylsiloxane / methylphenylsiloxane copolymer with both molecular chains, trimethylsiloxy group-capped diphenylpolysiloxane with both molecular chains , Trimethylsiloxy group-blocked dimethylsiloxane / diphenylsiloxane copolymer, both ends of molecular chain, Trimethylpentaphenyltrisiloxane, Phenyl (trimethylsiloxy) siloxane, Trimethylsiloxy group-blocked methyl at both ends of molecular chain Alkylpolysiloxane, trimethylsiloxy group-capped dimethylpolysiloxane / methylalkylsiloxane copolymer with both ends of molecular chain, trimethylsiloxy group-
- Cyclic organopolysiloxanes include hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), 1,1-diethylhexamethyl.
- Cyclotetrasiloxane phenylheptamethylcyclotetrasiloxane, 1,1-diphenylhexamethylcyclotetrasiloxane, 1,3,5,7-tetravinyltetramethylcyclotetrasiloxane, 1,3,5,7-tetramethylcyclotetra Siloxane, 1,3,5,7-tetracyclohexyltetramethylcyclotetrasiloxane, tris (3,3,3-trifluoropropyl) trimethylcyclotrisiloxane, 1,3,5,7-tetra (3-methacryloxyp Pyr) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra (3-acryloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra (3-carboxypropyl) tetramethylcyclotetrasiloxane 1,3,5,7-tetra (3-vinyl
- branched organopolysiloxane examples include methyltristrimethylsiloxysilane, ethyltristrimethylsiloxysilane, propyltristrimethylsiloxysilane, tetrakistrimethylsiloxysilane, and phenyltristrimethylsiloxysilane.
- dimethylpolysiloxane diethylpolysiloxane, methylphenylpolysiloxane, polydimethyl-polydiphenylsiloxane copolymer, polymethyl-3,3,3-trifluoropropylsiloxane and the like are preferable.
- dimethylpolysiloxane is typical.
- the silicone oil in the present invention may be a modified silicone oil.
- the modified silicone oil include polyoxyalkylene-modified silicone oil.
- the polyoxyalkylene-modified silicone oil is a silicone oil in which a polyoxyalkylene group is bonded to the molecule via a silicon-carbon bond, and preferably exhibits water solubility at room temperature, specifically at 25 ° C. More preferably, it is a nonionic one.
- the polyoxyalkylene-modified silicone oil is, for example, a copolymer of a silicone oil made of linear or branched siloxane and a polyoxyalkylene, and there are various types. ) Is preferred.
- R 1 is independently the same as above, Each R 2 is 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 a carbon number of 2 to 5 such as ethylene oxide or propylene oxide.
- a polyoxyalkylene group comprising at least one alkylene oxide of d represents an integer of 1 to 500; e represents an integer of 1 to 50).
- Examples of the substituted or unsubstituted divalent hydrocarbon group include a linear or branched divalent hydrocarbon group having 1 to 30 carbon atoms. Specific examples include a methylene group, a dimethylene group, and trimethylene.
- a linear or branched alkylene group having 1 to 30 carbon atoms such as a group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group; vinylene group, arylene group, butenylene group, Alkenylene groups having 2 to 30 carbon atoms such as hexenylene group and octenylene group; arylene groups having 6 to 30 carbon atoms such as phenylene group and diphenylene group; alkylene arylene groups having 7 to 30 carbon atoms such as dimethylenephenylene group And hydrogen atoms bonded to carbon atoms of these groups are at least partially halogen atoms such as fluorine, hydroxyl groups,
- polyoxyalkylene-modified silicone oil examples include the following. (Where x is 20 to 160, y is 1 to 25, and the value of x / y is 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 , where m is 7 to 40, n is 0 to 40, m + n
- the value of is at least 1 and may be graft polymerized or randomly polymerized, and R 4 represents a hydrogen atom or the above substituted or unsubstituted monovalent hydrocarbon group.
- m is 7-30 and n is 0-30)
- modified silicone oil examples include aminoalkyl-modified silicone oil.
- the aminoalkyl-modified silicone oil is a silicone oil having an aminoalkyl group bonded to the molecule via a silicon-carbon bond, and preferably exhibits a viscosity of 10 to 100,000 cs at room temperature, specifically at 25 ° C. It is.
- G is represented by the formula: — (NR 4 CH 2 CH 2 ) z NR 4 2 (wherein R 4 is independently as defined above, z Is a number of 0 ⁇ z ⁇ 4).
- the amount of silicone contained in the wood pulp, and hence the glass board interleaf made of the wood pulp is 0.5 ppm or less with respect to the absolute dry mass of the wood pulp or interleaf. More preferably, it is 0.4 ppm or less, still more preferably 0.3 ppm or less, still more preferably 0.2 ppm or less, and particularly preferably 0.1 ppm or less.
- 0.5ppm of silicone color film breaks caused by a small amount of silicone transferred to the glass in high-definition scenes such as mobile devices that require a very high-definition display are highly detailed. This is because there is an increased risk of being conspicuous and being judged as a quality defect.
- absolute dry means a state in which moisture is not substantially present in an object to be dried by drying. For example, at the room temperature (25 ° C.) of an object in an “absolutely dry” state.
- the weight change per hour is 1% or less, preferably 0.5% or less, more preferably 0.1% or less.
- silicone-based antifoaming agents are frequently used as antifoaming agents used to prevent deterioration in cleaning performance due to foam generation in the wood pulp manufacturing process, particularly in the washing step.
- the agent-derived silicone remains in the pulp.
- the silicone-based antifoaming agent is produced, for example, by mixing a modified silicone, a surfactant or the like with a mixture of silicone oil and hydrophobic silica.
- the non-colored or non-color-developing discontinuous regions having a diameter of 30 ⁇ m or more present on the surface after applying the colorant or color-developing agent to the wood pulp for glass board interleaving is set to 1000 pieces / 1000 m 2 or less, and / or Non-colored or non-color-developing discontinuous regions having a diameter of 30 ⁇ m or more present on the surface of a handsheet having a thickness of 230 ⁇ m prepared from the above wood pulp by a method according to JIS P 8222 and having a color or color-developing agent applied thereto 50/1000 m 2 or less, and / or 15 non-colored or non-color developing discontinuous regions having a diameter of 30 ⁇ m or more present on the surface of the interleaving paper for glass plate of the present invention after the application of the coloring agent or coloring agent.
- the wood pulp used as the raw material of the interleaf does not contain much silicone.
- the means for reducing the content of silicone in the wood pulp used as the raw material for the slip paper is not particularly limited, but as an antifoaming agent used during wood pulp production It is preferable to use a non-silicone antifoaming agent.
- non-silicone-based antifoaming agents include mineral oil-based antifoaming agents, higher alcohol-based antifoaming agents, fatty acid-based antifoaming agents, fatty acid ester-based antifoaming agents, amide-based antifoaming agents, and amine-based antifoaming agents. , Phosphate ester defoamers, metal soap defoamers, sulfonate ester defoamers, polyether defoamers and vegetable oil defoamers.
- the mineral oil-based antifoaming agent includes, for example, mineral oil such as hydrocarbon oil, mineral wax, and the like.
- the higher alcohol antifoaming agent includes, for example, octyl alcohol, hexadecyl alcohol and the like.
- the fatty acid-based antifoaming agent includes, for example, palmitic acid, oleic acid, stearic acid and the like.
- the fatty acid ester antifoaming agent includes, for example, isoamyl stearate, glycerin monoricinolate, sorbitol monolaurate, soliitol trioleate and the like.
- the amide antifoaming agent includes, for example, acrylate polyamine.
- the amine-based antifoaming agent includes, for example, diallylamine.
- the phosphate ester antifoaming agent includes, for example, tributyl phosphate, sodium octyl phosphate and the like.
- the metal soap type antifoaming agent includes, for example, aluminum stearate, calcium stearate, potassium oleate and the like.
- the sulfonate ester antifoaming agent includes, for example, sodium lauryl sulfonate, sodium dodecyl sulfonate, and the like.
- Polyether-based antifoaming agents include, for example, polyoxyalkylenes such as (poly) oxyethylene (poly) oxypropylene adducts; diethylene glycol heptyl ether, polyoxyethylene oleyl ether, polyoxypropylene butyl ether, polyoxyethylene polyoxypropylene (Poly) oxyalkylene alkyl ethers such as 2-ethylhexyl ether, higher alcohols having 8 or more carbon atoms and secondary alcohols having 12 to 14 carbon atoms such as oxyethyleneoxypropylene adducts; polyoxypropylene phenyl ether, polyoxy (Poly) oxyalkylene (alkyl) aryl ethers such as ethylene nonylphenyl ether; 2,4,7,9-tetramethyl-5-decyne-4,7-diol, 2,5-dimethyl-3-hex Acetylene ethers obtained by addition polymerization of alkylene oxide
- the vegetable oil-based antifoaming agent includes, for example, vegetable oils such as soybean oil, corn oil, coconut oil, linseed oil, rapeseed oil, cottonseed oil, sesame oil, castor oil and the like.
- the non-silicone antifoaming agent can contain inorganic particles such as hydrophobic silica.
- hydrophobic silica it is preferable to use silica hydrophobized by substituting silanol groups of hydrophilic silica with alkyl groups such as methyl groups.
- the non-silicone antifoaming agent can also contain a surfactant or the like as necessary. Accordingly, the non-silicone antifoaming agent may be an emulsion type.
- the wood pulp for glass board interleaving paper of the present invention has (1) 1000/1000 m 2 or less non-colored or non-colored discontinuous regions having a diameter of 30 ⁇ m or more present on the surface after applying the colorant or color former. Or (2) 30 ⁇ m present on the surface of the handsheet after application of the colorant or color former to the 230 ⁇ m-thick handsheet prepared by the method according to JIS P 8222 using the wood pulp.
- the number of non-colored discontinuous regions having the above diameter is 50/1000 m 2 or less, but it is preferable to have both characteristics.
- the pulp for glass board plywood according to the present invention has (1) 1000 non-colored or non-coloring discontinuous regions having a diameter of 30 ⁇ m or more present on the surface of the wood pulp after applying the coloring agent or coloring agent.
- / 1000 m 2 or less preferably 500 pieces / 1000 m 2 or less, more preferably 300 pieces / 1000 m 2 or less, even more preferably 150 pieces / 1000 m 2 or less, even more preferably 130 pieces / 1000 m 2 or less
- Non-colored with a diameter of 30 ⁇ m or more present on the surface of the handsheet after applying a colorant or a colorant to a handsheet having a thickness of 230 ⁇ m prepared from the wood pulp by a method according to JIS P 8222 or preferably non-chromogenic discontinuous area is 50/1000 m 2 or less, more preferably 30 pieces / 1000 m 2 or less Still more preferably 20 pieces / 1000 m 2 or less, it is preferable to provide 10/1000 m 2 or less, both
- Wood pulp usable in the present invention includes softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), softwood bleached sulfite pulp (NBSP), hardwood bleached sulfite pulp (LBSP), and thermomechanical pulp (TMP). These are wood pulps such as single or mixed. This wood pulp is mainly used, and if necessary, non-wood pulp such as hemp, bamboo, cocoon, kenaf, cocoon, cocoon and cotton, modified pulp such as cationized pulp, mercerized pulp, rayon, vinylon, nylon, Synthetic fibers such as acrylic and polyester, chemical fibers, or microfibrillated pulp can be used alone or in combination.
- NNKP softwood bleached kraft pulp
- LKP hardwood bleached kraft pulp
- NBSP softwood bleached sulfite pulp
- LBSP hardwood bleached sulfite pulp
- TMP thermomechanical pulp
- the pulp may contaminate the glass plate surface. Therefore, chemical pulp with as little resin as possible, for example, softwood bleached kraft pulp, is used alone. It is preferable to do. Also, high yield pulp such as groundwood pulp is not preferred because it contains a large amount of resin.
- mixing synthetic fibers and chemical fibers improves cutting performance and improves workability when making interleaving paper into a lithographic plate. However, care must be taken because recyclability deteriorates in terms of waste disposal. .
- the papermaking fiber mainly composed of the above-described wood pulp
- an adhesive an antifungal agent, various papermaking fillers, a wet paper strength enhancer, Add dry paper strength enhancer, sizing agent, colorant, fixing agent, yield improver, slime control agent, etc.
- a wet paper strength enhancer Add dry paper strength enhancer, sizing agent, colorant, fixing agent, yield improver, slime control agent, etc.
- a preferable beating degree in the present invention is 300 to 650 ml c. s. f. It is.
- a glass plate interleaving paper particularly the glass plate interleaving paper of the present invention, can be obtained by an ordinary method.
- calendering, super calendering, soft nip calendering, embossing, and the like may be performed during and / or after production of the glass sheet interleaf. Surface properties and thickness can be adjusted by processing.
- the thickness of the glass interleaving paper is preferably 0.01 to 0.4 mm, more preferably 0.05 to 0.2 mm, and still more preferably 0.06 to 0.13 mm.
- the basis weight of the interleaving paper for glass plate of the present invention is preferably 20 to 200 g / m 2 , more preferably 25 to 100 g / m 2 , and even more preferably 30 to 80 g / m 2. preferable.
- the interleaving paper for glass plate of the present invention has 15/1000 m 2 or less non-colored or non-color developing discontinuous regions having a diameter of 30 ⁇ m or more present on the surface after application of the coloring agent or coloring agent. Therefore, it is natural that the interleaving paper for a glass plate of the present invention includes the one after the colorant or color former is applied, but when the colorant or color former is applied, it is 30 ⁇ m or more that appears on the surface.
- a non-colored or non-coloring discontinuous region having a diameter of 15/1000 m 2 or less is also included before application of the coloring agent or coloring agent.
- the interleaving paper obtained from the wood pulp of the present invention is used by being inserted between the glass plates.
- the glass sheet interleaving paper is typically inserted one by one between a plurality of glass sheets to form a laminated body as a whole, and the laminated body is a target for storage and transportation.
- a glass plate for flat panel displays, such as a plasma display panel, a liquid crystal display panel (especially TFT liquid crystal display panel), and an organic electroluminescent display panel.
- Fine electrodes, partition walls, etc. are formed on the surface of the glass plate for flat panel display, but by using the glass plate interleaf made of the wood pulp of the present invention, particularly the glass plate interleaf of the present invention. Since the transfer of hydrophobic substances such as silicone to the glass plate is suppressed or avoided, even if fine electrodes, partition walls, etc. are formed on the surface of the glass plate, it is possible to suppress or avoid problems caused by silicone, As a result, display defects can be suppressed or avoided.
- the glass plate interleaf made of the wood pulp of the present invention particularly the glass plate interleaf of the present invention
- the glass board interleaf made of the wood pulp of the present invention, particularly the glass board interleaf of the present invention has a very small number of scattered hydrophobic substances such as silicone. It is possible to suppress or avoid transfer of a hydrophobic substance such as a glass plate to a glass plate. Therefore, the glass plate interleaf made of the wood pulp of the present invention, particularly the glass plate interleaf of the present invention, can be suitably used for a glass plate for a flat panel display in which surface cleanliness is particularly required.
- the present invention also relates to a method for inspecting wood pulp for glass plate interleaving paper or glass sheet interleaving paper.
- the inspection method of the wood pulp for glass board interleaving paper or the glass sheet interleaving paper of the present invention Applying a colorant or color former to wood pulp for glass board or paper for glass board;
- the step of applying a colorant or color former to wood pulp for glass board or paper for glass board is, for example, applying a composition such as a solution or dispersion containing the colorant or colorant to the pulp or interleaf. Or by immersing the pulp or interleaf in a composition such as a solution or a dispersion containing a colorant or a color former. It is preferable to apply an aqueous solution of an aqueous dye to the pulp or interleaf. It is preferable to dry the pulp or interleaf after the application or immersion.
- the concentration of the colorant or color former in the composition is not particularly limited, but is preferably 0.001 to 20% by weight, more preferably 0.01 to 10% by weight, and 0.1 to 1% by weight. Is even more preferred.
- the step of measuring the number of non-colored or non-coloring discontinuous regions having a diameter of 30 ⁇ m or more on the surface of the wood pulp for glass plate interleaving paper or the paper sheet for glass plate after application is colored with non-coloring or non-coloring regions.
- the coloring region can be identified by the presence or absence of coloring or the presence or absence of coloring during electromagnetic wave irradiation, the glass plate interleaf paper pulp or glass plate obtained by an optical instrument can also be visually observed. It is preferable to perform an automatic measurement by processing an image of the surface of the slip sheet.
- the number of the non-colored or non-coloring discontinuous regions can be uniquely determined as the number per unit area (for example, 1000/1000 m 2 , 15/1000 m 2, etc.).
- the presence ratio of the non-colored or non-coloring discontinuous region is 1000 pieces / 1000 m 2 or less of the wood pulp for glass board plywood or the existence ratio of the non-colored or non-coloring discontinuous region is 15 pieces / 1000 m 2 or less.
- the step of selecting the glass sheet interleaving paper is, for example, according to a preset standard of 1000 pieces / 1000 m 2 or less or 15 pieces / 1000 m 2 or less, and for the wood pulp or glass plate for the glass board ply paper that meets the standard. It can be carried out by manually or automatically sorting the slip sheets.
- the application, measurement, and determination steps are performed on a part of the interleaving paper obtained from the same lot of wood pulp. If the slip sheet meets the above criteria, it can be considered acceptable for all the slip sheets prepared from the wood pulp of the lot.
- the inspection method of the present invention can be easily carried out because the presence of hydrophobic substances such as silicone present on the surface of inspection paper prepared from wood pulp for glass plate interleaving paper or glass sheet interleaving paper can be visually confirmed. can do.
- Example 1 (Production of wood pulp)
- a conifer bleached kraft pulp manufacturing apparatus consisting of a cooking process, a washing process, an oxygen delignification reaction process, and a multistage bleaching bleaching process with chlorine dioxide and hydrogen peroxide
- An appropriate amount of a stock solution of a mineral oil-based antifoaming agent “Pronal A5044” (manufactured by Toho Chemical Co., Ltd.), which is a non-silicone-based antifoaming agent, was continuously added as an antifoaming agent used in the cleaning liquid.
- an appropriate amount of “Pronal A5044” was added as an antifoaming agent added to the wash press in the press washing step.
- the softwood bleached kraft pulp A which used the non-silicone type
- the form of this softwood bleached kraft pulp A was made into a sheet-like pulp having a thickness of 1.2 mm and a basis weight of 700 g / m 2 according to a conventional method.
- a 1% by weight aqueous solution of the dye “Lebasel First Black G” (Brancofor Japan Co., Ltd.) was applied directly to the surface of this softwood bleached kraft pulp A, it was observed under a microscope. The existence ratio was 74 pieces / 1000 m 2 .
- Example 2 (Production of wood pulp)
- softwood bleached kraft pulp A was obtained.
- a handsheet having a thickness of 230 ⁇ m was produced by using this softwood bleached kraft pulp A as a raw material in accordance with JIS P 8222.
- a 1% by weight aqueous solution of the dye “Rebasel First Black G” (Brancophor Japan Co., Ltd.) was applied directly to the surface of this handmade paper and observed under a microscope, the proportion of non-colored discontinuous regions having a diameter of 30 ⁇ m or more was found. 10 pieces / 1000 m 2 .
- Example 3 (Production of glass sheet interleaf) As a wood pulp, 100 parts by mass of the kraft pulp A of the conifer of Example 1 was prepared, and this was disaggregated to give a beating degree of 520 mlc. s. f. 0.5 parts by weight of polyacrylamide (trade name: Polystron 1250, manufactured by Arakawa Chemical Industries, Ltd.) as a paper strength enhancer was added to the slurry prepared in the above, and a pulp slurry having a concentration of 0.4% was added. Prepared. This was used to obtain a glass sheet interleaf having a basis weight of 50 g / m 2 and a thickness of 0.093 mm using a long net paper machine.
- polyacrylamide trade name: Polystron 1250, manufactured by Arakawa Chemical Industries, Ltd.
- Example 4 (Production of glass plate interleaving paper) Glass plate interleaving paper was obtained by the same production method as in Example 3 except that the basis weight was 30 g / m 2 and the thickness was 0.054 mm. A 1% by weight aqueous solution of a direct dye “Levacel First Black G” (Blanco For Japan Co., Ltd.) was applied to the surface of this glass plate interleaf and observed with a microscope. As a result, the existence ratio of non-colored discontinuous regions having a diameter of 30 ⁇ m or more was 4/1000 m 2 .
- Example 5 (Production of glass sheet interleaf) Glass plate interleaving paper was obtained by the same production method as in Example 3 except that the basis weight was 80 g / m 2 and the thickness was 0.125 mm. A 1% by weight aqueous solution of a direct dye “Levacel First Black G” (Blanco For Japan Co., Ltd.) was applied to the surface of this glass plate interleaf and observed with a microscope. As a result, the existence ratio of non-colored discontinuous regions having a diameter of 30 ⁇ m or more was 7/1000 m 2 .
- Comparative Example 2 (Production of glass plate interleaving paper) A glass sheet plywood having a basis weight of 50 g / m 2 was obtained in the same manner as in Example 3 except that 100 parts by mass of the softwood bleached kraft pulp B of Comparative Example 1 was used as the wood pulp. A 1% by weight aqueous solution of a direct dye “Levacel First Black G” (Blanco For Japan Co., Ltd.) was applied to the surface of this glass plate interleaf and observed with a microscope. As a result, the existence ratio of non-colored discontinuous regions having a diameter of 30 ⁇ m or more was 18/1000 m 2 .
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Abstract
Description
ガラス板合紙用木材パルプ又はガラス板用合紙に着色剤又は発色剤を適用する工程、
前記適用後の前記ガラス板合紙用木材パルプ又はガラス板用合紙の表面における30μm以上の径の非着色又は非発色不連続領域の個数を測定する工程、
前記非着色又は非発色不連続領域の前記個数及び前記ガラス板合紙用木材パルプ又はガラス板用合紙の表面積から前記非着色又は非発色不連続領域の存在割合を決定する工程、
前記非着色又は非発色不連続領域の前記存在割合が1000個/1000m2以下、好ましくは500個/1000m2以下、より好ましくは300個/1000m2以下、更により好ましくは150個/1000m2以下、更により好ましくは130個/1000m2以下のガラス板合紙用木材パルプ又は前記非着色又は非発色不連続領域の前記存在割合が15個/1000m2以下、好ましくは12個/1000m2以下、より好ましくは10個/1000m2以下、更により好ましくは8個/1000m2以下のガラス板用合紙を選別する工程
を含む、ガラス板合紙用木材パルプ又はガラス板用合紙の検査方法に関する。
R1 3SiO-(R1 2SiO)a-SiR1 3 (1)
R1 (4-c)Si(OSiR1 3)c (3)
(式中、
R1は、それぞれ独立して、水素原子、水酸基、或いは、置換若しくは非置換の一価炭化水素基、アルコキシ基で示される基から選択される基であり、
aは、0~1000の整数であり、
bは3~100の整数であり、
cは1~4の整数、好ましくは2~4の整数である)
で表されるオルガノポリシロキサンが挙げられる。
R2 3SiO-(R1 2SiO)d-(R1ASiO)e-SiR2 3 (4)
(式中、
R1は、それぞれ独立して、上記と同様であり、
R2は、それぞれ独立して、R1又はAであり、
Aは、それぞれ独立して、R3Gで表される基であり、R3は、置換若しくは非置換の二価炭化水素基であり、Gはエチレンオキサイド、プロピレンオキサイド等の炭素数2~5のアルキレンオキサイドを少なくとも1種含有してなるポリオキシアルキレン基を表し、
dは1~500の整数を表し、
eは1~50の整数を表す)。
xは20~160、yは1~25であり、x/yの値は50~2であり、
Aは、例えば-(CH2)3O-(CH2CH2O)m-(CH2CH2CH2O)n-R4であり、mは7~40、nは0~40、m+nの値は少なくとも1であり、グラフト重合されたものでもランダム重合されたものでもよく、R4は水素原子又は上記置換若しくは非置換の一価炭化水素基を表す。好適には、mは7~30、nは0~30である)
ガラス板合紙用木材パルプ又はガラス板用合紙に着色剤又は発色剤を適用する工程、
前記適用後の前記ガラス板合紙用木材パルプ又はガラス板用合紙の表面における30μm以上の径の非着色又は非発色不連続領域の個数を測定する工程、
前記非着色又は非発色不連続領域の前記個数及び前記ガラス板合紙用木材パルプ又はガラス板用合紙の表面積から前記非着色又は非発色不連続領域の存在割合を決定する工程、
前記非着色又は非発色不連続領域の前記存在割合が1000個/1000m2以下、好ましくは500個/1000m2以下、より好ましくは300個/1000m2以下、更により好ましくは150個/1000m2以下、更により好ましくは130個/1000m2以下のガラス板合紙用木材パルプ又は前記非着色又は非発色不連続領域の前記存在割合が15個/1000m2以下、好ましくは12個/1000m2以下、より好ましくは10個/1000m2以下、更により好ましくは8個/1000m2以下のガラス板用合紙を選別する工程
を含む。
アルミ製で75度の角度がつけられたL 字架台上のガラス載置面に発泡ウレタンを敷き、ガラス板を垂直方向に載置するための載置面と、載置面の後端部から垂直方向に延びる背もたれ面に向けて、サイズ680mm×880mm×0.7mmのガラス板120枚と各ガラス板の間にガラス板合紙を挿入して、背もたれ面に平行となるように立てかけ、架台に固定された帯状のベルトを後端部から背もたれ面へ全周にわたり掛け渡してガラス板を固定した。上記のようにセットされた架台は、外部からの埃や塵等の混入を防ぐため包装資材で全面を被覆した。その後、トラックでの輸送テストを実施した。輸送テスト条件は、輸送距離1000km(輸送途中に40℃×95%RHの環境下に5日間保管)でテストを実施した。
蒸解工程と、洗浄工程と、酸素脱リグニン反応工程と、二酸化塩素及び過酸化水素による多段晒漂白工程とからなる針葉樹晒クラフトパルプの製造装置において、蒸解工程後にノットを除去した直後のドラムウォッシャーの洗浄液に使用される消泡剤として非シリコーン系の消泡剤である鉱物油系消泡剤「プロナールA5044」(東邦化学社製)の原液を適量連続添加した。また、プレス洗浄の工程でウォッシュプレスに添加される消泡剤として同じく「プロナールA5044」を適量加えた。なお、洗浄工程ではトルエンとメタノールを混合した溶剤で洗浄し、ろ過する溶剤洗浄を5回繰り返した。以上のように、製造工程中で非シリコーン系消泡剤を使用した針葉樹晒クラフトパルプAを得た。この針葉樹晒クラフトパルプAの形態を、定法に従って、厚み1.2mm、坪量700g/m2のシート状パルプとした。
この針葉樹晒クラフトパルプAの表面に直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察したところ、30μm以上の径の非着色不連続領域の存在割合は74個/1000m2であった。
実施例1と同様にして針葉樹晒クラフトパルプAを得た。
この針葉樹晒クラフトパルプAを原料としてJIS P 8222に準拠した方法で厚み230μmの手すき紙を作製した。この手すき紙の表面に直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察したところ、30μm以上の径の非着色不連続領域の存在割合は10個/1000m2であった。
また、消泡剤としてシリコーン系消泡剤「SNデフォーマー551K」(サンノプコ社製)を使用し、かつ、前記溶剤洗浄を行わない以外は実施例1及び2と同様にして針葉樹晒クラフトパルプBを得た。この針葉樹晒クラフトパルプBの形態を、定法に従って、厚み1.2mm、坪量700g/m2のシート状パルプとした。
この針葉樹晒クラフトパルプBの表面に直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察したところ、30μm以上の径の非着色不連続領域の存在割合は1260個/1000m2であった。
また、この針葉樹晒クラフトパルプBを原料としてJIS P 8222に準拠した方法で厚み230μmの手すき紙を作製した。この手すき紙の表面に直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察したところ、30μm以上の径の非着色不連続領域の存在割合は56個/1000m2であった。
木材パルプとして実施例1の針葉樹晒クラフトパルプAを100質量部用意し、これを離解して叩解度を520mlc.s.f.に調製したスラリーに紙力増強剤としてポリアクリルアミド(商品名:ポリストロン1250、荒川化学工業社製)を全パルプ質量に対して0.5質量部添加し、0.4%濃度のパルプスラリーを調成した。これを、長網抄紙機を使用して、坪量50g/m2、厚み0.093mmのガラス板合紙を得た。
このガラス板合紙の表面に、直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察した。その結果、30μm以上の径の非着色不連続領域の存在割合は4個/1000m2であった。
坪量30g/m2、厚み0.054mmとした以外は実施例3と同様の製法によりガラス板合紙を得た。
このガラス板合紙の表面に、直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察した。その結果、30μm以上の径の非着色不連続領域の存在割合は4個/1000m2であった。
坪量80g/m2、厚み0.125mmとした以外は実施例3と同様の製法によりガラス板合紙を得た。
このガラス板合紙の表面に、直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察した。その結果、30μm以上の径の非着色不連続領域の存在割合は7個/1000m2であった。
木材パルプとして比較例1の針葉樹晒クラフトパルプB100質量部を使用した以外は実施例3と同様の手法で、坪量50g/m2のガラス板合紙を得た。
このガラス板合紙の表面に、直接染料「レバセルファースト ブラックG」(ブランコフォアジャパン(株))1重量%水溶液を塗布して顕微鏡観察した。その結果、30μm以上の径の非着色不連続領域の存在割合は18個/1000m2であった。
Claims (16)
- ガラス板合紙用木材パルプであって、
着色剤又は発色剤を適用した後の前記木材パルプの表面に存在する30μm以上の径の非着色又は非発色不連続領域が1000個/1000m2以下、好ましくは500個/1000m2以下、より好ましくは300個/m2以下、更により好ましくは150個/1000m2以下、更により好ましくは130個/1000m2以下であるガラス板合紙用木材パルプ。 - ガラス板合紙用木材パルプであって、
JIS P 8222に準拠した方法で前記木材パルプから調製された厚み230μmの手すき紙の表面に着色剤又は発色剤を適用した後の表面に存在する30μm以上の径の非着色又は非発色不連続領域が50個/1000m2以下、好ましくは30個/1000m2以下、より好ましくは20個/1000m2以下、更により好ましくは10個/1000m2以下である、ガラス板合紙用木材パルプ。 - 前記着色剤が水性染料である、請求項1又は2記載のガラス板合紙用木材パルプ。
- 前記不連続領域が疎水性物質を含む、請求項1乃至3のいずれかに記載のガラス板合紙用木材パルプ。
- 前記疎水性物質がシリコーン、好ましくはシリコーン油、更に好ましくはジメチルポリシロキサンを含む、請求項4記載のガラス板合紙用木材パルプ。
- 前記ガラス板がディスプレイ用、好ましくはTFT液晶ディスプレイ用又は有機ELディスプレイ用である請求項1乃至5のいずれかに記載のガラス板合紙用木材パルプ。
- 請求項1乃至6のいずれかに記載のガラス板合紙用木材パルプを含むガラス板合紙。
- ガラス板合紙の製造のための請求項1乃至6のいずれかに記載の木材パルプの使用。
- 木材パルプを原料とするガラス板用合紙であって、
着色剤又は発色剤の適用後の表面に存在する30μm以上の径の非着色又は非発色不連続領域が15個/1000m2以下、好ましくは12個/1000m2以下、より好ましくは10個/1000m2以下、更により好ましくは8個/1000m2以下のガラス板用合紙。 - 前記着色剤が水性染料である、請求項9記載のガラス板用合紙。
- 前記不連続領域が疎水性物質を含む、請求項9又は10記載のガラス板用合紙。
- 前記疎水性物質がシリコーン、好ましくはシリコーン油、更に好ましくはジメチルポリシロキサンを含む、請求項11記載のガラス板用合紙。
- 前記ガラス板がディスプレイ用、好ましくはTFT液晶ディスプレイ用又は有機ELディスプレイ用である請求項9乃至12のいずれかに記載のガラス板用合紙。
- 請求項9乃至13のいずれかに記載のガラス板用合紙及びガラス板からなる積層体。
- 請求項9乃至13のいずれかに記載のガラス板用合紙をガラス板間に配置する工程を含むガラス板の保護方法。
- ガラス板合紙用木材パルプ又はガラス板用合紙に着色剤又は発色剤を適用する工程、
前記適用後の前記ガラス板合紙用木材パルプ又はガラス板用合紙の表面における30μm以上の径の非着色又は非発色不連続領域の個数を測定する工程、
前記非着色又は非発色不連続領域の前記個数及び前記ガラス板合紙用木材パルプ又はガラス板用合紙の表面積から前記非着色又は非発色不連続領域の存在割合を決定する工程、
前記非着色又は非発色不連続領域の前記存在割合が1000個/1000m2以下、好ましくは500個/1000m2以下、より好ましくは300個/1000m2以下、更により好ましくは150個/1000m2以下、更により好ましくは130個/1000m2以下のガラス板合紙用木材パルプ又は前記非着色又は非発色不連続領域の前記存在割合が15個/1000m2以下、好ましくは12個/1000m2以下、より好ましくは10個/1000m2以下、更により好ましくは8個/1000m2以下のガラス板用合紙を選別する工程
を含む、ガラス板合紙用木材パルプ又はガラス板用合紙の検査方法。
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KR20170140940A (ko) * | 2016-06-14 | 2017-12-22 | 도쿠슈 도카이 세이시 가부시키가이샤 | 유리판 합지용 목재 펄프 및 유리판용 합지 |
KR102626487B1 (ko) * | 2016-06-14 | 2024-01-17 | 도쿠슈 도카이 세이시 가부시키가이샤 | 유리판 합지용 목재 펄프 및 유리판용 합지 |
KR20170142118A (ko) * | 2016-06-16 | 2017-12-27 | 아사히 가라스 가부시키가이샤 | 유리 합지, 유리 합지의 제조 방법 및 유리판 적층체 |
JP2017226479A (ja) * | 2016-06-16 | 2017-12-28 | 旭硝子株式会社 | ガラス合紙、ガラス合紙の製造方法、及びガラス板積層体 |
KR102389062B1 (ko) | 2016-06-16 | 2022-04-22 | 에이지씨 가부시키가이샤 | 유리 합지, 유리 합지의 제조 방법 및 유리판 적층체 |
WO2019188927A1 (ja) * | 2018-03-29 | 2019-10-03 | 特種東海製紙株式会社 | ガラス板用合紙及びその製造方法 |
JPWO2019188927A1 (ja) * | 2018-03-29 | 2021-02-12 | 特種東海製紙株式会社 | ガラス板用合紙及びその製造方法 |
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KR20210031800A (ko) | 2021-03-22 |
TWI663308B (zh) | 2019-06-21 |
KR20170062486A (ko) | 2017-06-07 |
KR20190015623A (ko) | 2019-02-13 |
CA2961544A1 (en) | 2016-06-02 |
CN107075814A (zh) | 2017-08-18 |
EP3225737A4 (en) | 2018-08-29 |
TW201623736A (zh) | 2016-07-01 |
JPWO2016084547A1 (ja) | 2017-06-29 |
KR102372961B1 (ko) | 2022-03-10 |
JP6459079B2 (ja) | 2019-01-30 |
EP3225737A1 (en) | 2017-10-04 |
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