WO2022209223A1 - Glass spacer paper and method for controlling generation of paper dust from glass spacer paper - Google Patents
Glass spacer paper and method for controlling generation of paper dust from glass spacer paper Download PDFInfo
- Publication number
- WO2022209223A1 WO2022209223A1 PCT/JP2022/002588 JP2022002588W WO2022209223A1 WO 2022209223 A1 WO2022209223 A1 WO 2022209223A1 JP 2022002588 W JP2022002588 W JP 2022002588W WO 2022209223 A1 WO2022209223 A1 WO 2022209223A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- paper
- interleaving paper
- glass plates
- glass
- pulp
- Prior art date
Links
- 239000011521 glass Substances 0.000 title claims abstract description 155
- 239000000428 dust Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 33
- 125000006850 spacer group Chemical group 0.000 title abstract 6
- 230000009172 bursting Effects 0.000 claims abstract description 26
- 229920001131 Pulp (paper) Polymers 0.000 claims description 43
- 239000004973 liquid crystal related substance Substances 0.000 claims description 11
- 239000002356 single layer Substances 0.000 claims description 9
- 239000010893 paper waste Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 5
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 190
- 239000000835 fiber Substances 0.000 description 46
- 239000002002 slurry Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 238000010009 beating Methods 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229910010272 inorganic material Inorganic materials 0.000 description 8
- 239000000454 talc Substances 0.000 description 8
- 229910052623 talc Inorganic materials 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 150000002484 inorganic compounds Chemical class 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 239000013055 pulp slurry Substances 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 229920003043 Cellulose fiber Polymers 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000004049 embossing Methods 0.000 description 5
- 229920002545 silicone oil Polymers 0.000 description 5
- 239000011122 softwood Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 235000010980 cellulose Nutrition 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000011121 hardwood Substances 0.000 description 4
- 239000010954 inorganic particle Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 3
- 238000003490 calendering Methods 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002655 kraft paper Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 239000002121 nanofiber Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000012209 synthetic fiber Substances 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 2
- 239000010433 feldspar Substances 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000013054 paper strength agent Substances 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- -1 polymethyl-3,3,3-trifluoropropylsiloxane Polymers 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000010421 standard material Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- WKBPZYKAUNRMKP-UHFFFAOYSA-N 1-[2-(2,4-dichlorophenyl)pentyl]1,2,4-triazole Chemical compound C=1C=C(Cl)C=C(Cl)C=1C(CCC)CN1C=NC=N1 WKBPZYKAUNRMKP-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 240000006248 Broussonetia kazinoki Species 0.000 description 1
- 235000006716 Broussonetia kazinoki Nutrition 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 241001265525 Edgeworthia chrysantha Species 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 244000299507 Gossypium hirsutum Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 206010061876 Obstruction Diseases 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 229910052586 apatite Inorganic materials 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 229920003090 carboxymethyl hydroxyethyl cellulose Polymers 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000834 fixative Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 229910021472 group 8 element Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910052892 hornblende Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001254 oxidized starch Substances 0.000 description 1
- 235000013808 oxidized starch Nutrition 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007652 sheet-forming process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000011031 topaz Substances 0.000 description 1
- 229910052853 topaz Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- D21H5/00—Special paper or cardboard not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D57/00—Internal frames or supports for flexible articles, e.g. stiffeners; Separators for articles packaged in stacks or groups, e.g. for preventing adhesion of sticky articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/48—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for glass sheets
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
Definitions
- the glass plate for which the interleaving paper for glass plate of the first aspect of the present invention is used is preferably for a display, and the display is preferably a TFT liquid crystal display or an organic EL display.
- a color filter may be formed on the surface of the glass plate.
- the interleaving paper for glass plates in the second aspect of the present invention is preferably made from wood pulp.
- the wood pulp does not contain waste paper pulp.
- the glass plate for which the interleaving paper for glass plate in the second aspect of the present invention is used is preferably for a display, and the display is preferably a TFT liquid crystal display or an organic EL display.
- a color filter may be formed on the surface of the glass plate.
- the interleaving paper for glass plates according to the present invention is suitable as an interleaving paper for glass plates that requires high cleanliness. and is particularly suitable as interleaving paper for glass plates for liquid crystal displays or organic EL displays.
- the specific burst strength is specified in JIS P8112, and is a value obtained by dividing the burst strength (in units of kPa) by the basis weight (in units of g/m 2 ) measured by the method specified in JIS P8124.
- the pulp may contaminate the surface of the glass plate. It is preferred to use the pulp alone.
- waste paper pulp obtained from waste paper also contains a relatively large amount of resin derived from ink and the like
- the wood pulp preferably does not contain waste paper pulp.
- high-yield pulps such as groundwood pulps are also undesirable because they contain a large amount of resin.
- synthetic fibers or chemical fibers are mixed, sharpening properties are improved, and workability when making a planographic paper is improved. .
- the freeness is preferably 100 to 600 mlcsf, more preferably 200 to 600 mlcsf, even more preferably more than 300 to 600 mlcsf, even more preferably more than 300 to 450 mlcsf.
- the beating machine used for the beating is not particularly limited, and commonly used conical refiners, drum refiners, disk refiners, etc. can be used.
- conical refiners drum refiners, disk refiners, etc.
- desired cutting, wet beating, etc. can be performed by adjusting the plate pattern.
- any dehydration method can be used, and a conventionally known method can be used.
- the sheet can be dewatered by pressing it with rolls.
- the sheet may be dehydrated by suction.
- processing such as calendering, super calendering, soft nip calendering, embossing, and creping may be performed during and/or after the interleaving paper for glass plates is manufactured. Surface property and thickness can be adjusted by these processes.
- Embossing treatment, creping treatment, etc. are preferably performed in order to make the specific bursting strength defined by JIS P8112 of the glass plate interleaving paper of the present invention 1.4 kPa ⁇ m 2 /g or more.
- the interleaving paper for glass plates becomes easier to stretch, and the strength in the direction perpendicular to the paper surface increases.
- embossing, creping, pinhole processing, etc. By performing embossing, creping, pinhole processing, etc., the contact area with the glass is reduced, the adhesion strength is reduced, and the interleaving paper can be easily peeled off from the glass.
- embossing and creping can impart cushioning properties to the interleaving paper itself, and thus have the effect of preventing the glass surface from being scratched.
- the basis weight of the interleaving paper for glass plates of the present invention is preferably 20 to 100 g/m 2 , more preferably 25 to 80 g/m 2 , and even more preferably 30 to 70 g/m 2 . preferable.
- the average fiber diameter of the short fibers is preferably 10 ⁇ m to 50 ⁇ m, more preferably 12 ⁇ m to 40 ⁇ m, even more preferably 15 ⁇ m to 30 ⁇ m.
- the "average fiber diameter” here means that multiple locations on the surface of the glass plate interleaving paper are enlarged and observed with an electron microscope, and a predetermined number of fibers are randomly selected from each electron microscope image. It means the average fiber diameter obtained by measuring and averaging the diameters of the fibers.
- the number of fibers to be sorted is 100 or more, preferably 150 or more, more preferably 200 or more, even more preferably 300 or more.
- the amount of the short fibers present on the surface of the interleaving paper for glass plates of the present invention is preferably 300 to 850/cm 2 , more preferably 330 to 800/cm 2 , and more preferably 350 to 800/cm 2 . More preferably, it is 750 lines/cm 2 .
- a relatively small amount of short fibers can reduce the amount of contaminants attracted by the short fibers.
- the moisture content of the interleaving paper for glass plates of the present invention is preferably 2 to 10% by mass, more preferably 3 to 9% by mass, and even more preferably 4 to 8% by mass. If the water content is less than 2% by mass, the glass interleaving paper itself tends to be charged with static electricity, which is not preferable because static electricity causes a blocking phenomenon between the paper and the glass plate. On the other hand, if the moisture content exceeds 10% by mass, there is a possibility that the blocking phenomenon with the glass plate due to excess moisture, or that the dimensional stability may deteriorate due to the decrease in moisture content during use.
- the glass plate is not particularly limited, it is preferably a glass plate for flat panel displays such as plasma display panels, liquid crystal display panels (particularly TFT liquid crystal display panels), and organic EL display panels.
- Fine electrodes, barrier ribs, color filters, etc. are formed on the surface of glass plates for flat panel displays, and by using the interleaving paper for glass plates of the present invention, the transfer of paper dust to the glass plate can be prevented. Since it is suppressed, even if fine electrodes, partition walls, color filters, etc. are formed on the surface of the glass plate, inconvenience due to paper dust can be suppressed or avoided, and as a result, defects of the display can be suppressed or avoided. can be done.
- the interleaving paper for glass plates of the present invention has an extremely clean surface, does not form so-called discoloration or paper texture (patterns) on the surface of the glass plate in contact, and does not cause damage to the surface of the glass plate in contact. is not attached.
- the interleaving paper for glass plates of the present invention preferably suppresses or avoids transfer of foreign matter other than paper dust to the surface of the glass plate.
- Examples of the inorganic material include inorganic particles having a Mohs hardness of 4 or more.
- Examples of the inorganic particles include metal oxides and inorganic silicon oxides having a Mohs hardness of 4 or more.
- the metal constituting the metal oxide is not particularly limited as long as the oxide has a Mohs hardness of 4 or more.
- Group 8 elements such as Silicon dioxide is preferred as the inorganic silicon oxide.
- Examples of the inorganic particles having a Mohs hardness of 4 or more include mineral oxides.
- Examples of the inorganic particles having a Mohs hardness of 4 or more include iron oxide, copper, quartz, fused quartz (quartz glass), titanium oxide, glass pieces, crystal pieces, magnesium oxide, and sand.
- talc is also mentioned as said inorganic substance.
- Talc is called "hydrated magnesium silicate” and can be represented by a chemical formula of 4SiO2.3MgO.H2O .
- the chemical composition varies somewhat depending on the production area, and the theoretical value is a weight ratio of 64.4% SiO 2 , 31.8% MgO, and 4.7% loss on ignition (moisture).
- Talc is also called talc.
- the average particle size of the talc is not particularly limited, it is preferably 1 to 10 ⁇ m, more preferably 1 to 8 ⁇ m, even more preferably 1 to 6 ⁇ m, and particularly preferably 1 to 4 ⁇ m.
- Silicones include, for example, silicone oils. Silicone oil is hydrophobic and its molecular structure may be cyclic, linear or branched. The kinematic viscosity of silicone oil at 25° C. 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 amount of silicone contained in the glass plate interleaving paper of the present invention is preferably 0.5 ppm or less, more preferably 0.4 ppm or less, and more preferably 0.3 ppm or less relative to the absolute dry mass of the interleaving paper. Even more preferably, 0.2 ppm or less is even more preferable, and 0.1 ppm or less is particularly preferable.
- Paper dust is generated from the paper surface by the action of external force from the various rollers used in the paper feeding operation, and the ratio of interleaving paper for glass panes.
- the existence of an inverse correlation between bursting strength and generation of paper dust was unknown.
- the generation of paper can be suppressed satisfactorily by setting the relative bursting strength of interleaving paper for glass plates to 1.4 kPa ⁇ m 2 /g or more as defined in JIS P8112. Met.
- the present invention provides a new technique for suppressing the generation of paper dust from interleaving paper for glass plates.
- the paper dust generation suppression method of the present invention is suitable for glass plates for flat panel displays such as plasma display panels, liquid crystal display panels (especially TFT liquid crystal display panels), organic EL display panels, etc., for which surface cleanliness is particularly required. can be used for
- Example 2 The pulp slurry prepared in Example 1 was mixed with 100 parts by mass of NBKP contained in the pulp slurry, and 20 parts by mass of polyethylene terephthalate fiber (fiber length 3 mm cut) was mixed, and a Fourdrinier machine was used. An interleaving paper for a glass plate having a basis weight of 50 g/m 2 was obtained in the same manner as in No. 1.
- Abrasion test Abrasion tests were carried out on the interleaving papers for glass plates of Examples 1-4 and Comparative Examples 1-2.
- the abrasion test was performed using a paperboard abrasion resistance tester (manufactured by Kumagai Riki Kogyo Co., Ltd.) in accordance with JIS P8136: 1994, and a load of 500 gf was applied from a set of interleaving paper for glass plates at a speed of 30 reciprocations per minute. was slid back and forth so that the front and back surfaces of the paper were brought into contact and friction with each other.
Abstract
The present invention pertains to: glass spacer paper that has a bursting factor of at least 1.4 kPa∙m2/g according to JIS P8112; and a method for controlling the generation of paper dust from the glass spacer paper having a bursting factor of at least 1.4 kPa∙m2/g according to JIS P8112. The present invention makes it possible to provide: glass spacer paper which enables favorable control of the generation of paper dust therefrom; and a method for favorably controlling the generation of paper dust from such glass spacer paper.
Description
本発明は、例えば、液晶ディスプレイ、プラズマディスプレイ、有機エレクトロルミネッセンス（有機ＥＬ）ディスプレイ等のフラットパネル・ディスプレイ用のガラス板を複数枚積層して保管、運搬する過程において、ガラス板を包装する紙、及び、ガラス板の間に挟み込む紙、並びに、これらの紙からの紙粉発生抑制に関するものである。
The present invention provides, for example, paper for wrapping glass plates in the process of stacking and storing and transporting a plurality of glass plates for flat panel displays such as liquid crystal displays, plasma displays, and organic electroluminescence (organic EL) displays, Also, the present invention relates to paper sandwiched between glass plates, and suppression of paper dust generation from these papers.
一般に、液晶ディスプレイ、プラズマディスプレイ、有機ＥＬディスプレイ等のフラットパネル・ディスプレイ用のガラス板を、複数枚積層して保管する過程、トラック等で運搬する流通過程等において、ガラス板同士が衝撃を受けて接触して擦れ傷が発生し、また、ガラス表面が汚染するのを防止する目的でガラス板の間に合紙と称される紙を挟み込むことが行われている。
In general, glass sheets for flat panel displays such as liquid crystal displays, plasma displays, and organic EL displays are subjected to impact during the process of stacking and storing multiple glass sheets, or during the distribution process of transporting them by truck or the like. Paper called interleaving paper is sandwiched between the glass plates for the purpose of preventing scratching caused by contact and contamination of the glass surface.
そのようなフラットパネル・ディスプレイ用のガラス板は、一般の建築用窓ガラス板、車両用窓ガラス板等とは異なり、その表面に極めて微細な回路等が形成されることから、ガラス表面は汚染が極力無いクリーンな表面を保持していることが求められる。したがって、ガラス表面と接触する合紙にも非常に高い清浄度が求められている。
Such glass plates for flat panel displays differ from general architectural window glass plates and vehicle window glass plates in that extremely fine circuits are formed on the surface of the glass plate, so the glass surface is contaminated. It is required to maintain a clean surface with as little dust as possible. Therefore, the interleaving paper that comes into contact with the glass surface is also required to have a very high degree of cleanliness.
そして、近年、ガラス表面の汚染物質の１つとしてガラス合紙から発生する紙粉が認識されており、紙粉の発生を抑制するために、特許文献１では、合紙の製造に使用されるパルプのフリーネスを特定の範囲とすることが提案されている。
In recent years, paper dust generated from glass interleaving paper has been recognized as one of the contaminants on the glass surface. It has been proposed to set the freeness of the pulp to a certain range.
しかし、そのような合紙であっても、紙粉の発生を良好に抑制可能な訳ではない。
However, even with such interleaving paper, it is not possible to effectively suppress the generation of paper dust.
本発明は、紙粉の発生を良好に抑制可能なガラス板用合紙、並びに、ガラス板用合紙からの紙粉発生を良好に抑制する方法を提供することを課題とする。
An object of the present invention is to provide an interleaving paper for glass plates that can satisfactorily suppress the generation of paper dust, and a method for satisfactorily suppressing the generation of paper dust from the interleaving paper for glass plates.
本発明では、ガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とすることによって、ガラス板用合紙からの紙粉の発生を抑制する。
In the present invention, the generation of paper dust from the interleaving paper for glass plates is suppressed by setting the specific bursting strength defined by JIS P8112 of the interleaving paper for glass plates to be 1.4 kPa·m 2 /g or more.
本発明の第一の態様は、ＪＩＳ Ｐ８１１２で規定される比破裂強さが１．４ｋＰａ・ｍ２／ｇ以上であるガラス板用合紙に関する。
A first aspect of the present invention relates to an interleaving paper for glass plates having a specific burst strength of 1.4 kPa·m 2 /g or more as defined in JIS P8112.
本発明の第一の態様のガラス板用合紙は木材パルプを原料とすることが好ましい。前記木材パルプは古紙パルプを含まないことが好ましい。
The interleaving paper for glass plates of the first aspect of the present invention is preferably made from wood pulp. Preferably, the wood pulp does not contain waste paper pulp.
本発明の第一の態様のガラス板用合紙は単層であることが好ましい。
The interleaving paper for glass plates of the first aspect of the present invention is preferably a single layer.
本発明の第一の態様のガラス板用合紙が使用されるガラス板はディスプレイ用であることが好ましく、当該ディスプレイはＴＦＴ液晶ディスプレイ又は有機ＥＬディスプレイであることが好ましい。前記ガラス板の表面にはカラーフィルターが形成されてもよい。
The glass plate for which the interleaving paper for glass plate of the first aspect of the present invention is used is preferably for a display, and the display is preferably a TFT liquid crystal display or an organic EL display. A color filter may be formed on the surface of the glass plate.
本発明の第二の態様は、ガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とする、ガラス板用合紙からの紙粉発生抑制方法に関する。
A second aspect of the present invention is a method for suppressing the generation of paper dust from interleaving paper for glass plates, wherein the specific bursting strength of the interleaving paper for glass plates as defined in JIS P8112 is 1.4 kPa·m 2 /g or more. Regarding.
本発明の第二の態様におけるガラス板用合紙は木材パルプを原料とすることが好ましい。前記木材パルプは古紙パルプを含まないことが好ましい。
The interleaving paper for glass plates in the second aspect of the present invention is preferably made from wood pulp. Preferably, the wood pulp does not contain waste paper pulp.
本発明の第二の態様におけるガラス板用合紙は単層であることが好ましい。
The interleaving paper for glass plates in the second aspect of the present invention is preferably a single layer.
本発明の第二の態様におけるガラス板用合紙が使用されるガラス板はディスプレイ用であることが好ましく、当該ディスプレイはＴＦＴ液晶ディスプレイ又は有機ＥＬディスプレイであることが好ましい。前記ガラス板の表面にはカラーフィルターが形成されてもよい。
The glass plate for which the interleaving paper for glass plate in the second aspect of the present invention is used is preferably for a display, and the display is preferably a TFT liquid crystal display or an organic EL display. A color filter may be formed on the surface of the glass plate.
本発明により、ガラス板用合紙からの紙粉の発生を良好に抑制することができる。
According to the present invention, it is possible to satisfactorily suppress the generation of paper dust from interleaving paper for glass plates.
本発明では、ガラス板用合紙からの紙粉の発生を良好に抑制することができるために、本発明に係るガラス板用合紙は高い清浄度が求められるガラス板用の合紙として好適であり、液晶ディスプレイ用又は有機ＥＬディスプレイ用のガラス板用の合紙として特に好適である。
In the present invention, since the generation of paper dust from the interleaving paper for glass plates can be suppressed well, the interleaving paper for glass plates according to the present invention is suitable as an interleaving paper for glass plates that requires high cleanliness. and is particularly suitable as interleaving paper for glass plates for liquid crystal displays or organic EL displays.
本発明者らは、ガラス板用合紙からの紙粉の発生原因について鋭意検討した結果、ガラス板の間に合紙を挿入させる給紙作業の際に、給紙作業に使用される各種のローラー等による外力の作用によって紙表面から紙粉が発生することを見出した。
The inventors of the present invention have made intensive studies on the cause of the generation of paper dust from interleaving paper for glass plates. It was found that paper dust is generated from the paper surface by the action of external force caused by
そして、ガラス板用合紙への外力への作用について鋭意検討の結果、紙粉の発生に関して、ガラス板用合紙の比破裂強さが重要であることを見出した。
As a result of intensive studies on the effect of external force on the interleaving paper for glass plates, it was found that the relative bursting strength of the interleaving paper for glass plates is important for the generation of paper dust.
すなわち、これまで、ガラス板用合紙の比破裂強さと紙粉の発生との関係については認識されていなかったが、更に鋭意検討の結果、ガラス板用合紙の比破裂強さと紙粉の発生との逆相関が判明した。そして、本発明者らは、ガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とすることにより、紙粉の発生を良好に抑制可能であることを見出し、本発明を完成した。
That is, until now, the relationship between the relative burst strength of interleaving paper for glass plates and the generation of paper dust was not recognized. An inverse correlation with development was found. The present inventors have found that the generation of paper dust can be favorably suppressed by setting the relative bursting strength of the interleaving paper for glass plates to 1.4 kPa m 2 /g or more as defined in JIS P8112. We found that and completed the present invention.
本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さは１．４ｋＰａ・ｍ２／ｇ以上であり、１．９ｋＰａ・ｍ２／ｇ以上が好ましく、２．６ｋＰａ・ｍ２／ｇ以上がより好ましく、３．２ｋＰａ・ｍ２／ｇ以上が更により好ましい。
The glass plate interleaving paper of the present invention has a specific burst strength defined by JIS P8112 of 1.4 kPa·m 2 /g or more, preferably 1.9 kPa·m 2 /g or more, and 2.6 kPa·m 2 . /g or more is more preferable, and 3.2 kPa·m 2 /g or more is even more preferable.
比破裂強さは、ＪＩＳ Ｐ８１１２で規定されており、破裂強さ（ｋＰａ単位）をＪＩＳ Ｐ８１２４に規定する方法によって測定した坪量（ｇ／ｍ２単位）で除した値である。
The specific burst strength is specified in JIS P8112, and is a value obtained by dividing the burst strength (in units of kPa) by the basis weight (in units of g/m 2 ) measured by the method specified in JIS P8124.
破裂強さもＪＩＳ Ｐ８１１２で規定されており、流体を用いて紙に圧力を加えることによって紙が破裂するときの強さである。
Bursting strength is also specified in JIS P8112, and is the strength when paper bursts when pressure is applied to the paper using a fluid.
ＪＩＳ Ｐ８１１２の破裂強さ試験の試験対象の紙はＪＩＳ Ｐ８１１１に従って、温度２３±１℃、相対湿度５０±２％の標準状態に置かれる。試験は表裏１０回ずつ実施され平均値が比破裂強さとなる。
The paper subject to the JIS P8112 bursting strength test is placed in a standard condition of 23±1°C temperature and 50±2% relative humidity in accordance with JIS P8111. The test was performed 10 times on each side, and the average value was the specific burst strength.
破裂強さの測定では紙面に垂直な方向で圧力を加えているので、破裂強さ及び比破裂強さは紙の厚み方向の強度を反映している。破裂強さ及び比破裂強さは紙面の厚み方向の強度ではない引張強度又は引裂強度とは異なる。同様に、破裂強さ及び比破裂強さは、紙面の表層のみの二次元的な強度を示す表面強度とも異なる。
In the measurement of bursting strength, pressure is applied in the direction perpendicular to the surface of the paper, so the bursting strength and specific bursting strength reflect the strength in the thickness direction of the paper. Bursting strength and specific bursting strength are different from tensile strength or tearing strength, which is not the strength in the thickness direction of the paper. Similarly, bursting strength and specific bursting strength are also different from surface strength, which indicates the two-dimensional strength of only the surface layer of paper.
本発明のガラス板用合紙は木材パルプを原料とすることが好ましい。木材パルプは主にセルロース繊維からなる。すなわち、本発明のガラス板用合紙はセルロース繊維からなることが好ましい。
The interleaving paper for glass plates of the present invention is preferably made from wood pulp. Wood pulp consists mainly of cellulose fibers. That is, the interleaving paper for glass plates of the present invention preferably comprises cellulose fibers.
本発明のガラス板用合紙の原料として使用可能な木材パルプとしては、針葉樹晒クラフトパルプ（ＮＢＫＰ）、広葉樹晒クラフトパルプ（ＬＢＫＰ）、針葉樹晒サルファイトパルプ（ＮＢＳＰ）、広葉樹晒サルファイトパルプ（ＬＢＳＰ）、サーモメカニカルパルプ（ＴＭＰ）等の木材パルプを単独あるいは混合したものが好ましい。
Wood pulp that can be used as a raw material for the interleaving paper for glass plates of the present invention includes bleached softwood kraft pulp (NBKP), bleached hardwood kraft pulp (LBKP), bleached softwood sulfite pulp (NBSP), and bleached hardwood sulfite pulp ( Wood pulp such as LBSP) and thermomechanical pulp (TMP) are preferred alone or in combination.
本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とするためには、原料となる木材パルプとして針葉樹製パルプを主に使用する、及び／又は、原料となる木材パルプ中の広葉樹製パルプの使用を制限することが好ましい。針葉樹製パルプを主に使用する、及び／又は、広葉樹製パルプの使用を制限することにより、本発明のガラス板用合紙の紙面垂直方向の強度を増大させることができる。
In order to set the specific bursting strength of the interleaving paper for glass plates of the present invention to 1.4 kPa·m 2 /g or more as defined in JIS P8112, softwood pulp is mainly used as the raw material wood pulp. and/or it is preferable to limit the use of hardwood pulp in the starting wood pulp. Mainly using softwood pulp and/or limiting the use of hardwood pulp can increase the strength of the interleaving paper for glass plates of the present invention in the direction perpendicular to the paper surface.
また、本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とするためには、木材パルプにセルロースナノファイバー等の微細セルロース繊維を混合することが好ましい。微細セルロース繊維の混合により本発明のガラス板用合紙の紙面垂直方向の強度を増強させることができる。
In addition, in order to make the specific bursting strength of the interleaving paper for glass plates of the present invention 1.4 kPa·m 2 /g or more as defined in JIS P8112, wood pulp is mixed with fine cellulose fibers such as cellulose nanofibers. preferably. By mixing fine cellulose fibers, the strength of the interleaving paper for glass plates of the present invention in the direction perpendicular to the paper surface can be increased.
更に、木材パルプと、必要に応じて、麻、竹、藁、ケナフ、楮、三椏や木綿等の非木材パルプ；カチオン化パルプ、マーセル化パルプ等の変性パルプ；レーヨン、ビニロン、ナイロン、アクリル、ポリエステル等の合成繊維若しくは化学繊維等を単独で或いは混合して併用することができる。
Furthermore, wood pulp and optionally non-wood pulp such as hemp, bamboo, straw, kenaf, kozo, mitsumata and cotton; modified pulp such as cationized pulp and mercerized pulp; rayon, vinylon, nylon, acrylic, Synthetic fibers such as polyester or chemical fibers may be used singly or in combination.
但し、パルプ中に樹脂分が多く含まれると、当該樹脂分がガラス板表面を汚染する等の悪影響を及ぼす可能性があるので、木材パルプとして、できるだけ樹脂分の少ない化学パルプ、例えば針葉樹晒クラフトパルプを単独で使用することが好ましい。
However, if the pulp contains a large amount of resin, the resin may contaminate the surface of the glass plate. It is preferred to use the pulp alone.
また、古紙から得られた古紙パルプもインキ等に由来する樹脂分が比較的多く含まれるので、木材パルプは古紙パルプを含まないことが好ましい。更に、砕木パルプのような高収率パルプも樹脂分が多く含まれるので好ましくない。なお、合成繊維若しくは化学繊維を混合させると削刀性が向上し、合紙を平版にする際の作業性が向上するが、廃棄物処理の面においてリサイクル性が悪くなるので注意が必要である。
In addition, since waste paper pulp obtained from waste paper also contains a relatively large amount of resin derived from ink and the like, the wood pulp preferably does not contain waste paper pulp. Furthermore, high-yield pulps such as groundwood pulps are also undesirable because they contain a large amount of resin. In addition, when synthetic fibers or chemical fibers are mixed, sharpening properties are improved, and workability when making a planographic paper is improved. .
そして、本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とするためには、合成繊維や化学繊維を使用しない方が好ましい。
In order to set the specific bursting strength of the glass sheet interleaving paper of the present invention to 1.4 kPa·m 2 /g or more as defined in JIS P8112, it is preferable not to use synthetic fibers or chemical fibers.
木材パルプは、原料となる木材チップから、蒸解工程、精選・洗浄工程、漂白工程等を経る通常の木材パルプの製造方法によって製造することが可能である。
Wood pulp can be produced from wood chips, which are the raw material, by a normal wood pulp production method that goes through the cooking process, selection/washing process, bleaching process, etc.
前記木材パルプの形態は特に限定されるものではなく、シート状、ブロック状又はフレーク状の任意の形態をとることができる。シート状のパルプは、例えば、ワイヤーパート、プレスパート、ドライパート、フィニッシングの４つの工程を備えるパルプマシンを使用して得ることができる。ワイヤーパートでは長網や真空フィルター等を使ってパルプ繊維を抄紙し、プレスパートではロールプレスを使って脱水する。ドライパートではシリンダードライヤーや、フラクトドライヤー等で乾燥し、最後にシート状パルプの両端を切り落としてロールに巻き取る。この様な方法は、紙パルプ技術協会が出版している「紙パルプ製造技術シリーズ」や、「紙パルプの製造 技術全書」に詳細に記載されている。なお、ブロック状のパルプは、例えば、上記シート状パルプを積層して得ることができ、また、フレーク状のパルプは、例えば、上記シート状パルプを粉砕して得ることができる。
The form of the wood pulp is not particularly limited, and can be in any form such as sheet, block or flake. A sheet-like pulp can be obtained, for example, using a pulp machine comprising four steps of wire part, press part, dry part and finishing. In the wire part, pulp fibers are made into paper using a fourdrinier, vacuum filter, etc., and in the press part, a roll press is used to dewater the paper. In the dry part, the pulp is dried with a cylinder dryer, a fract dryer, etc. Finally, both ends of the sheet-like pulp are cut off and wound on a roll. Such methods are described in detail in the "Paper Pulp Manufacturing Technology Series" and "Paper Pulp Manufacturing Technology Complete Book" published by the Pulp and Paper Technology Association. The block-shaped pulp can be obtained, for example, by laminating the sheet-shaped pulp, and the flake-shaped pulp can be obtained, for example, by pulverizing the sheet-shaped pulp.
前記シート状パルプの厚さは、０．７～１．５ｍｍであることが好ましく、０．９～１．３ｍｍであることがより好ましく、１．０～１．２ｍｍであることが更により好ましい。
The thickness of the sheet pulp is preferably 0.7 to 1.5 mm, more preferably 0.9 to 1.3 mm, even more preferably 1.0 to 1.2 mm. .
前記シート状パルプの坪量は、４００～１３００ｇ／ｍ２であることが好ましく、５００～１２００ｇ／ｍ２であることがより好ましく、５００～１１００ｇ／ｍ２であることが更に好ましく、５００～１０００ｇ／ｍ２であることが更に好ましく、７００～１０００ｇ／ｍ２であることが更により好ましい。
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 . /m 2 , even more preferably 700 to 1000 g/m 2 .
本発明のガラス板用合紙は、例えば、木材パルプを使用して、通常の抄紙（製紙）方法により得ることができる。抄紙機としては、公知の長網抄紙機、円網抄紙機、短網抄紙機、長網と円網のコンビネーション抄紙機等を使用可能である。
The interleaving paper for glass plates of the present invention can be obtained, for example, using wood pulp by a normal papermaking (papermaking) method. As a paper machine, a known fourdrinier paper machine, a cylinder paper machine, a short-mesh paper machine, a combination paper machine of a fourdrinier and a cylinder machine, or the like can be used.
本発明のガラス板用合紙は、例えば、
木材パルプのスラリーを調製するスラリー調製工程、
前記スラリーをシート状とするシート形成工程、
前記シートを脱水して湿紙を形成する湿紙調製工程、
前記湿紙を乾燥して前記合紙を得る乾燥工程
を少なくとも含む方法により製造することができる。 The interleaving paper for glass plates of the present invention is, for example,
a slurry preparation step of preparing a slurry of wood pulp;
a sheet forming step of forming the slurry into a sheet;
a wet paper preparation step of dewatering the sheet to form a wet paper;
It can be manufactured by a method including at least a drying step of drying the wet paper to obtain the interleaving paper.
木材パルプのスラリーを調製するスラリー調製工程、
前記スラリーをシート状とするシート形成工程、
前記シートを脱水して湿紙を形成する湿紙調製工程、
前記湿紙を乾燥して前記合紙を得る乾燥工程
を少なくとも含む方法により製造することができる。 The interleaving paper for glass plates of the present invention is, for example,
a slurry preparation step of preparing a slurry of wood pulp;
a sheet forming step of forming the slurry into a sheet;
a wet paper preparation step of dewatering the sheet to form a wet paper;
It can be manufactured by a method including at least a drying step of drying the wet paper to obtain the interleaving paper.
前記スラリー調製工程では、従来公知の方法で、木材パルプのスラリーを調製することができる。例えば、前記スラリー調製工程では、木材パルプを構成するセルロース繊維を離解させて水性懸濁液としてスラリーを調製する。
In the slurry preparation step, a slurry of wood pulp can be prepared by a conventionally known method. For example, in the slurry preparation step, cellulose fibers constituting wood pulp are disaggregated to prepare a slurry as an aqueous suspension.
本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とするためには、スラリー調製工程において、木材パルプを叩解することが好ましい。
In order to make the specific bursting strength defined by JIS P8112 of the interleaving paper for glass plates of the present invention 1.4 kPa·m 2 /g or more, it is preferable to beat the wood pulp in the slurry preparation step.
スラリーを調製する際に、木材パルプの叩解を進めると、セルロース繊維同士の絡み合いが増大し、紙層間強度が増す効果が期待できる。しかしながら、叩解を進めることによって、合紙として使用中に紙粉が発生する恐れがあるので、必要以上に叩解度を進めることは好ましくない。よって、好ましい叩解度は１００～６００ｍｌｃｓｆであり、２００～６００ｍｌｃｓｆがより好ましく、３００超～６００ｍｌｃｓｆが更により好ましく、３００超～４５０ｍｌｃｓｆが更により好ましい。
If the wood pulp is beaten when preparing the slurry, the entanglement between the cellulose fibers will increase, and the effect of increasing the strength between the paper layers can be expected. However, advancing the beating may generate paper dust during use as interleaving paper, so it is not preferable to advance the degree of beating more than necessary. Therefore, the freeness is preferably 100 to 600 mlcsf, more preferably 200 to 600 mlcsf, even more preferably more than 300 to 600 mlcsf, even more preferably more than 300 to 450 mlcsf.
前記叩解に使用される叩解機は、特には限定されるものではなく、一般的に用いられている、コニカル型リファイナー、ドラム型リファイナー、ディスク型リファイナー等を用いることができる。叩解にあたっては、木材パルプをなるべく短く切断しないようにフィブリル化することが好ましい。したがって、ダブルディスク型リファイナーが好ましい。また、プレートパターンを調整することにより、所望のカッティング、ウェットビーティング等を行うことができる。
The beating machine used for the beating is not particularly limited, and commonly used conical refiners, drum refiners, disk refiners, etc. can be used. In beating, it is preferable to fibrillate the wood pulp so as not to cut it as short as possible. Therefore, a double disc refiner is preferred. Moreover, desired cutting, wet beating, etc. can be performed by adjusting the plate pattern.
また、本発明の性能を損なわない範囲で、上記スラリーに対して、必要に応じて、バインダー、防黴剤、各種の製紙用填料、湿潤紙力増強剤、乾燥紙力増強剤、サイズ剤、着色剤、定着剤、歩留まり向上剤、スライムコントロール剤等の各種の添加剤を添加することができる。なお、これら薬品添加の際には虫やごみ等が混入しないように細心の注意を要することが好ましい。
In addition, to the extent that the performance of the present invention is not impaired, the slurry may optionally contain binders, antifungal agents, various papermaking fillers, wet strength agents, dry strength agents, sizing agents, Various additives such as colorants, fixatives, retention aids, slime control agents, etc. can be added. When adding these chemicals, it is preferable to take the utmost care so that insects, dust, etc. are not mixed.
本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とするためには、紙力増強剤を添加することが好ましい。
In order to make the specific burst strength defined by JIS P8112 of the interleaving paper for glass plates of the present invention 1.4 kPa·m 2 /g or more, it is preferable to add a paper strength enhancer.
前記スラリーをシート状とするシート形成工程では、従来公知の方法で、シート化を行うことができる。例えば、前記スラリーを平面状のワイヤ上に吐出したり（例えば、長網抄紙機）、或いは、円筒状のシリンダーに巻き付けたワイヤでスラリーからシートを掬い取る（例えば、円網抄紙機）ことによって、シートを得ることができる。
In the sheet forming step of forming the slurry into a sheet, the sheet can be formed by a conventionally known method. For example, by discharging the slurry onto a flat wire (e.g. Fourdrinier paper machine) or by scooping a sheet from the slurry with a wire wrapped around a cylindrical cylinder (e.g. cylinder paper machine). , you can get a sheet.
前記シートを脱水して湿紙を形成する湿紙調製工程では、脱水の手法は任意であり、従来公知の方法を使用することができる。例えば、前記シートをロールでプレスすることによって脱水することができる。また、前記シートを吸引して脱水してもよい。特に、比破裂強さを向上させるために、ロールプレス圧やスムーザー圧が高くなるよう調整することが好ましい。
In the wet paper preparation step of dewatering the sheet to form a wet paper, any dehydration method can be used, and a conventionally known method can be used. For example, the sheet can be dewatered by pressing it with rolls. Alternatively, the sheet may be dehydrated by suction. In particular, in order to improve the specific burst strength, it is preferable to adjust the roll press pressure and the smoother pressure to be high.
前記シート形成工程及び湿紙調製工程は別個の装置を用いて個別に行ってもよいが、同一の装置において連続的に或いは一部重複して実施してもよい。例えば、抄紙機のワイヤーパートにおいて、スラリーをワイヤー（網）に載せてシート化しつつ、脱水して湿紙を形成してもよい。
The sheet forming process and the wet paper web preparation process may be performed individually using separate apparatuses, but may be performed continuously or partially overlappingly in the same apparatus. For example, in the wire part of a paper machine, the slurry may be put on a wire (mesh) to form a sheet, and dewatered to form a wet paper web.
前記乾燥工程では、ドライヤーロール等を使用する従来公知の方法で、湿紙を乾燥して前記合紙を得ることができる。
In the drying step, the wet paper can be dried by a conventionally known method using a dryer roll or the like to obtain the interleaving paper.
なお、ガラス板用合紙の抄造の途中および／または製造後でカレンダー処理、スーパーカレンダー処理、ソフトニップカレンダー処理、エンボス処理、クレープ処理等の加工を行っても構わない。これらの加工により、表面性や厚さを調整することができる。
In addition, processing such as calendering, super calendering, soft nip calendering, embossing, and creping may be performed during and/or after the interleaving paper for glass plates is manufactured. Surface property and thickness can be adjusted by these processes.
本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とするためには、エンボス処理、クレープ処理等を行うことが好ましい。これらの処理を行うことにより、ガラス板用合紙が伸びやすくなり、紙面垂直方向の強度が増大する。
Embossing treatment, creping treatment, etc. are preferably performed in order to make the specific bursting strength defined by JIS P8112 of the glass plate interleaving paper of the present invention 1.4 kPa·m 2 /g or more. By carrying out these treatments, the interleaving paper for glass plates becomes easier to stretch, and the strength in the direction perpendicular to the paper surface increases.
例えば、エンボス処理により、ガラス板用合紙の表面に微細な凹凸を形成することができる。凹凸の高低差は０．１ｍｍ以下が好ましい。
For example, embossing can form fine unevenness on the surface of the interleaving paper for glass plates. The difference in height of the unevenness is preferably 0.1 mm or less.
また、クレープ処理では、ガラス板用合紙の表面に立体的な皺模様を形成することができる。クレープ率は５～２５％が好ましい。
In addition, the crepe treatment can form a three-dimensional wrinkled pattern on the surface of the interleaving paper for the glass plate. The crepe ratio is preferably 5 to 25%.
更に、ガラス板用合紙の表裏に貫通するピンホールを形成してもよい。ピンホールの径は例えば０．０１～１ｍｍとすることができる。
Furthermore, a pinhole may be formed that penetrates the front and back of the interleaving paper for the glass plate. The diameter of the pinhole can be, for example, 0.01-1 mm.
エンボス加工、クレープ処理、ピンホール加工等を行うことで、ガラスとの接触面積が減り、密着強度が低減され、ガラスから合紙を容易に剥離させることができる。また、エンボス加工やクレープ処理は、合紙自体にクッション性を付与できるためガラス表面に傷が付くのを防止する効果もある。
By performing embossing, creping, pinhole processing, etc., the contact area with the glass is reduced, the adhesion strength is reduced, and the interleaving paper can be easily peeled off from the glass. In addition, embossing and creping can impart cushioning properties to the interleaving paper itself, and thus have the effect of preventing the glass surface from being scratched.
本発明のガラス板用合紙の厚さは、２０～２００μｍであることが好ましく、３０～１５０μｍであることがより好ましく、４０～１００μｍであることが更により好ましい。
The thickness of the interleaving paper for glass plates of the present invention is preferably 20 to 200 μm, more preferably 30 to 150 μm, even more preferably 40 to 100 μm.
本発明のガラス板用合紙の坪量は、２０～１００ｇ／ｍ２であることが好ましく、２５～８０ｇ／ｍ２であることがより好ましく、３０～７０ｇ／ｍ２であることが更により好ましい。
The basis weight of the interleaving paper for glass plates of the present invention is preferably 20 to 100 g/m 2 , more preferably 25 to 80 g/m 2 , and even more preferably 30 to 70 g/m 2 . preferable.
上記のように、原料となる木材パルプの組成・叩解度の調整、叩解機の選定、スラリーへの添加剤の選定、紙の表面処理等を単独で又は適宜組み合わせて実施することにより、本発明のガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とすることができる。
As described above, the present invention can be achieved by adjusting the composition and degree of beating of wood pulp as a raw material, selecting a beating machine, selecting additives to the slurry, surface treatment of paper, etc., either singly or in combination. The specific burst strength defined by JIS P8112 of the interleaving paper for glass plates can be 1.4 kPa·m 2 /g or more.
本発明のガラス板用合紙は複数の層を備えてもよく単一の層からなるものでもよい。複数の層を備える態様としては単一又は複数の紙層と共に単一又は複数の被覆層を備える形態が挙げられる。被覆層の種類は特には限定されるものではなく、例えば、水溶性樹脂を含む樹脂層であることができる。水溶性樹脂としては、例えば、酸化澱粉、エステル化澱粉、エーテル化澱粉、デキストリン等の澱粉類、カルボキシメチルセルロース、ヒドロキシエチルセルロース等のセルロース誘導体類、並びにポリビニルアルコール類等が挙げられる。一方、単一の層を備える形態は単一の紙層を備える。本発明のガラス板用合紙は単一の層からなるものが好ましい。すなわち、本発明のガラス板用合紙は単層であることが好ましい。
The interleaving paper for glass plates of the present invention may have a plurality of layers or may consist of a single layer. A form having a plurality of layers includes a form having a single or a plurality of coating layers together with a single or a plurality of paper layers. The type of coating layer is not particularly limited, and may be, for example, a resin layer containing a water-soluble resin. Examples of water-soluble resins include starches such as oxidized starch, esterified starch, etherified starch and dextrin, cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, and polyvinyl alcohols. Forms with a single layer, on the other hand, have a single paper layer. The interleaving paper for glass plates of the present invention preferably comprises a single layer. That is, the interleaving paper for glass plates of the present invention is preferably a single layer.
本発明のガラス板用合紙は２００μｍ以下の繊維長を有する短繊維を含んでもよいが、当該短繊維は紙粉源となるおそれがあり、また、ガラス板の表面を傷付けたり汚染したりする異物を引き寄せるおそれがあるので、当該短繊維の含有量は制限されることが好ましい。
The glass plate interleaving paper of the present invention may contain short fibers having a fiber length of 200 μm or less, but the short fibers may become a source of paper dust and may damage or stain the surface of the glass plate. It is preferable to limit the content of the short fibers, as they may attract foreign matter.
本発明のガラス板用合紙中の２００μｍ以下の繊維長を有する短繊維の含有量は合紙の絶乾質量に対して１０．５重量％以下であることが好ましく、１０．０重量％以下がより好ましく、９．５重量％以下が更により好ましく、９．０重量％以下が特に好ましい。ここで、「繊維長」とは平均繊維長を意味しない。したがって、２００μｍ以下の繊維長を有する短繊維はその全てが２００μｍ以下の繊維長を有する。換言すれば、前記短繊維の最大繊維長は２００μｍ以下である。ここで、繊維長とは繊維を真っ直ぐに伸ばした状態とした場合の当該繊維の長さをいう。
The content of short fibers having a fiber length of 200 μm or less in the interleaving paper for glass plates of the present invention is preferably 10.5% by weight or less, and 10.0% by weight or less, relative to the absolute dry mass of the interleaving paper. is more preferable, 9.5% by weight or less is even more preferable, and 9.0% by weight or less is particularly preferable. Here, "fiber length" does not mean average fiber length. Therefore, all short fibers having a fiber length of 200 μm or less have a fiber length of 200 μm or less. In other words, the maximum fiber length of the short fibers is 200 μm or less. Here, the fiber length refers to the length of the fiber when the fiber is stretched straight.
なお、本発明において「絶乾」とは、乾燥により被乾燥対象物中に水分が実質的に存在しない状態を意味している。
In the present invention, "absolutely dry" means a state in which there is substantially no moisture in the object to be dried by drying.
前記短繊維の平均繊維径は１０μｍ～５０μｍであることが好ましく、１２μｍ～４０μｍであることがより好ましく、１５μｍ～３０μｍであることが更により好ましい。なお、ここでの「平均繊維径」とは、ガラス板用合紙の表面の複数箇所を電子顕微鏡によって拡大観察し、各電子顕微鏡画像中から所定数の繊維を無作為に選別し、選別された当該繊維の径を測定し平均して得られた平均繊維径を意味する。選別される繊維の数は１００本以上であり、１５０本以上が好ましく、２００本以上がより好ましく、３００本以上が更により好ましい。
The average fiber diameter of the short fibers is preferably 10 µm to 50 µm, more preferably 12 µm to 40 µm, even more preferably 15 µm to 30 µm. In addition, the "average fiber diameter" here means that multiple locations on the surface of the glass plate interleaving paper are enlarged and observed with an electron microscope, and a predetermined number of fibers are randomly selected from each electron microscope image. It means the average fiber diameter obtained by measuring and averaging the diameters of the fibers. The number of fibers to be sorted is 100 or more, preferably 150 or more, more preferably 200 or more, even more preferably 300 or more.
本発明のガラス板用合紙の表面における前記短繊維の存在量は３００本～８５０本／ｃｍ２であることが好ましく、３３０本～８００本／ｃｍ２であることがより好ましく、３５０本～７５０本／ｃｍ２であることがより好ましい。短繊維の存在量が比較的少ないと短繊維によって引き寄せられる異物の量を低減することができる。
The amount of the short fibers present on the surface of the interleaving paper for glass plates of the present invention is preferably 300 to 850/cm 2 , more preferably 330 to 800/cm 2 , and more preferably 350 to 800/cm 2 . More preferably, it is 750 lines/cm 2 . A relatively small amount of short fibers can reduce the amount of contaminants attracted by the short fibers.
本発明のガラス板用合紙においては、一方の表面における前記短繊維の存在量と他方の表面における前記短繊維の存在量との差が当該他方の表面における前記短繊維の存在量の１５％以下であることが好ましく、１２％以下であることがより好ましく、１０％以下であることが更により好ましい。すなわち、本発明のガラス板用合紙においては、一方の表面における短繊維の存在量が他方の表面における短繊維の存在量から上記の具体的範囲内となる程度に大きく変動しないことが好ましい。ここで、「存在量」とは、合紙の表面の単位面積当たりの前記短繊維の数を意味しており、例えば、ガラス板用合紙の表面の複数箇所を電子顕微鏡によって拡大観察し、当該箇所で観察された短繊維の数を単位面積当たりで平均することにより決定することができる。また、合紙の表面を下方に向けて所定の面積をシート等で擦って落下した繊維の中から２００μｍ以下の短繊維の単位面積当たりの数を得ることでも決定することができる。更に、合紙を厚み方向の中央で２分して非常に薄い２枚の紙とし、各紙をスラリー化して当該スラリー中の２００μｍ以下の短繊維の数を測定することでも決定することができる。或いは別の手法として、ガラス板用合紙の所定面積の表面を水で充分に洗浄し、脱落した繊維を繊維長測定機に供することでも短繊維の存在量を決定することができる。
In the interleaving paper for glass plates of the present invention, the difference between the abundance of the short fibers on one surface and the abundance of the staple fibers on the other surface is 15% of the abundance of the staple fibers on the other surface. It is preferably 12% or less, more preferably 12% or less, and even more preferably 10% or less. That is, in the interleaving paper for glass plates of the present invention, it is preferable that the amount of short fibers present on one surface does not vary greatly from the amount of short fibers present on the other surface to within the above specific range. Here, the term "abundance" means the number of the short fibers per unit area of the surface of the interleaving paper. It can be determined by averaging the number of short fibers observed at that location per unit area. It can also be determined by rubbing a predetermined area with a sheet or the like with the surface of the interleaving paper facing downward, and obtaining the number of short fibers of 200 μm or less per unit area from among the fallen fibers. Furthermore, it can also be determined by dividing the interleaving paper in half at the center in the thickness direction to make two very thin papers, making each paper into a slurry, and measuring the number of short fibers of 200 μm or less in the slurry. Alternatively, as another method, the amount of short fibers present can be determined by thoroughly washing a predetermined area of the surface of the interleaving paper for glass plates with water and subjecting the removed fibers to a fiber length measuring machine.
本発明のガラス板用合紙の含有水分は２～１０質量％であることが好ましく、３～９質量％がより好ましく、４～８質量％が更により好ましい。含有水分が２質量％未満であるとガラス合紙自体が静電気を帯びやすくなり、ガラス板との間で静電気によるブロッキング現象が発生するため好ましくない。また、含有水分が１０質量％を超えると、水分過多によるガラス板とのブロッキング現象や、使用時の水分減少により寸法安定性が悪くなるおそれがある。
The moisture content of the interleaving paper for glass plates of the present invention is preferably 2 to 10% by mass, more preferably 3 to 9% by mass, and even more preferably 4 to 8% by mass. If the water content is less than 2% by mass, the glass interleaving paper itself tends to be charged with static electricity, which is not preferable because static electricity causes a blocking phenomenon between the paper and the glass plate. On the other hand, if the moisture content exceeds 10% by mass, there is a possibility that the blocking phenomenon with the glass plate due to excess moisture, or that the dimensional stability may deteriorate due to the decrease in moisture content during use.
本発明のガラス板用合紙の表面電気抵抗値（ＪＩＳ Ｋ ６９１１ １９９５年に準拠）は、当該合紙を温度が２３℃、相対湿度が５０％の条件で２４時間以上調湿したあとに、同条件下で測定したとき、１×１０８～１×１０１３Ωの範囲内であることが好ましく、５×１０８～５×１０１２Ωの範囲内がより好ましく、１×１０９～１×１０１２Ωの範囲内が更により好ましい。表面電気抵抗値が１×１０８Ω未満では、ガラス板と合紙の密着性が低下するため、ハンドリング性が悪くなるおそれがある。更に、表面電気抵抗値が１×１０８Ω未満ということは、必要以上に水分や導電性物質（例えば界面活性剤）が添加されたことを意味する。過剰の水分はガラス合紙の寸法安定性に悪影響を及ぼす可能性があり、また、導電性物質の多くは有機性の物質であるため接触するガラス板表面にこれらの物質が移行して汚れ等の問題を引き起こす恐れがある。一方、ガラス板用合紙の表面電気抵抗値が１×１０１３Ωを越えるような高抵抗値になると、静電気を帯びやすくなり、接触するガラス板表面に合紙が密着してハンドリング性を著しく阻害するおそれがある。表面電気抵抗値を所望の範囲に調節する方法としては、例えば、乾燥等による水分調整が挙げられる。
The surface electrical resistance value (according to JIS K 6911, 1995) of the interleaving paper for glass plates of the present invention was obtained by conditioning the interleaving paper at a temperature of 23° C. and a relative humidity of 50% for 24 hours or more, When measured under the same conditions, it is preferably in the range of 1×10 8 to 1×10 13 Ω, more preferably in the range of 5×10 8 to 5×10 12 Ω, and 1×10 9 to 1×10 Ω. Even more preferably within the range of ×10 12 Ω. If the surface electrical resistance value is less than 1×10 8 Ω, the adhesion between the glass plate and the interleaving paper is reduced, which may result in poor handleability. Furthermore, the fact that the surface electrical resistance value is less than 1×10 8 Ω means that water or a conductive substance (for example, surfactant) was added more than necessary. Excessive moisture may adversely affect the dimensional stability of the glass interleaving paper, and since most of the conductive substances are organic substances, these substances migrate to the glass plate surface in contact with the glass plate, causing stains, etc. problems. On the other hand, when the surface electric resistance of the interleaving paper for glass plates becomes high, exceeding 1×10 13 Ω, it is likely to be charged with static electricity, and the interleaving paper adheres to the surface of the glass plate that comes into contact with it, resulting in significant handling property. There is a risk of obstruction. Methods for adjusting the surface electrical resistance value to a desired range include, for example, moisture adjustment by drying or the like.
本発明のガラス板用合紙はガラス板の間に挿入されて使用される。例えば、本発明のガラス板用合紙は複数のガラス板の間に、典型的には、１枚ずつ挿入され、全体として、積層体とされ、当該積層体が保管、運搬の対象となる。また、本発明のガラス板用合紙を用いてガラス板単体又は前記積層体を包装してもよい。
The interleaving paper for glass plates of the present invention is used by being inserted between glass plates. For example, the glass plate interleaving paper of the present invention is typically inserted one by one between a plurality of glass plates to form a laminate as a whole, which is to be stored and transported. Further, the interleaving paper for glass plates of the present invention may be used to package a single glass plate or the laminate.
ガラス板としては特に限定されるものではないが、プラズマディスプレイパネル、液晶ディスプレイパネル（特にＴＦＴ液晶ディスプレイパネル）、有機ＥＬディスプレイパネル等のフラットパネル・ディスプレイ用のガラス板であることが好ましい。フラットパネル・ディスプレイ用のガラス板の表面には微細な電極、隔壁、カラーフィルター等が形成されるが、本発明のガラス板用合紙を使用することにより、ガラス板への紙粉の転写が抑制されるので、ガラス板の表面に微細な電極、隔壁、カラーフィルター等が形成されても紙粉による不都合を抑制乃至回避することができ、結果的に、ディスプレイの欠陥を抑制乃至回避することができる。
Although the glass plate is not particularly limited, it is preferably a glass plate for flat panel displays such as plasma display panels, liquid crystal display panels (particularly TFT liquid crystal display panels), and organic EL display panels. Fine electrodes, barrier ribs, color filters, etc. are formed on the surface of glass plates for flat panel displays, and by using the interleaving paper for glass plates of the present invention, the transfer of paper dust to the glass plate can be prevented. Since it is suppressed, even if fine electrodes, partition walls, color filters, etc. are formed on the surface of the glass plate, inconvenience due to paper dust can be suppressed or avoided, and as a result, defects of the display can be suppressed or avoided. can be done.
特に、ディスプレイの大型化に伴い、フラットパネル・ディスプレイ用のガラス板のサイズ及び重量は増大しているが、本発明のガラス板用合紙はそのような大型乃至大重量のガラス板の表面を良好に保護することができる。特に、本発明のガラス板用合紙は紙粉の発生が極めて少ないので、大重量のガラス板によって押圧されても紙粉がガラス板に転写することが抑制乃至回避される。したがって、本発明のガラス板用合紙は、表面の清浄性が特に求められるフラットパネル・ディスプレイ用のガラス板に好適に使用することができる。
In particular, as displays become larger, the size and weight of glass plates for flat panel displays are increasing. Good protection. In particular, since the interleaving paper for glass plates of the present invention generates very little paper dust, even if it is pressed by a heavy glass plate, transfer of paper dust to the glass plate can be suppressed or avoided. Therefore, the interleaving paper for glass plates of the present invention can be suitably used for glass plates for flat panel displays, which particularly require cleanness of the surface.
本発明のガラス板用合紙は、紙粉の発生が良好に抑制されるので、クリーンルーム内で使用することができる。
The interleaving paper for glass plates of the present invention can be used in a clean room because the generation of paper dust is well suppressed.
本発明のガラス板用合紙は、表面が極めて清浄であり、接触するガラス板の表面に所謂ヤケ又は紙肌（模様）を形成せず、また、接触するガラス板の表面に問題となる傷を付けることがない。
The interleaving paper for glass plates of the present invention has an extremely clean surface, does not form so-called discoloration or paper texture (patterns) on the surface of the glass plate in contact, and does not cause damage to the surface of the glass plate in contact. is not attached.
本発明のガラス板用合紙は、紙粉以外の異物についてもガラス板の表面に転写することが抑制乃至回避されていることが好ましい。
The interleaving paper for glass plates of the present invention preferably suppresses or avoids transfer of foreign matter other than paper dust to the surface of the glass plate.
前記異物としては、各種の無機物又は有機物を挙げることができる。
Examples of the foreign matter include various inorganic substances and organic substances.
前記無機物としては、例えば、モース硬度４以上の無機粒子が挙げられる。前記無機粒子としては、モース硬度４以上の金属酸化物又は無機ケイ素酸化物が挙げられる。金属酸化物を構成する金属は、その酸化物のモース硬度が４以上であれば特に限定されるものではなく、例えば、マグネシウム等の第２族元素の元素、チタン等の第４族元素、鉄等の第８族元素が挙げられる。無機ケイ素酸化物としては、二酸化ケイ素が好ましい。前記モース硬度４以上の無機粒子としては、例えば、酸化鉱物が挙げられる。前記モース硬度４以上の無機粒子としては、特に、酸化鉄、銅、石英、溶融石英（石英ガラス）、酸化チタン、ガラス片、水晶片、酸化マグネシウム、砂等が挙げられる。砂は、主に、モース硬度５．５の角閃石、モース硬度６の長石及びモース硬度７の石英からなる。したがって、砂のモース硬度は４以上であり、典型的には７である。モース硬度とは、硬さの指標を１０段階で表したものであり、それぞれに対応する標準物質と測定する物質とを擦り、傷がつくかどうかで標準物質に対する硬さの大小を相対的に評価した値である。標準物質は、柔らかいもの（モース硬度１）から硬いもの（モース硬度１０）の順に、１：滑石、２：石膏、３：方解石、４：蛍石、５：燐灰石、６：長石、７：石英、８：トパーズ、９：コランダム、１０：ダイヤモンドである。モース硬度の測定方法は、表面の平滑なモース硬度既知の板２枚を用意し、測定したい異物を２枚の板の間に挟み、両方の板をこすり合わせて板表面の傷の発生有無を調べる。
Examples of the inorganic material include inorganic particles having a Mohs hardness of 4 or more. Examples of the inorganic particles include metal oxides and inorganic silicon oxides having a Mohs hardness of 4 or more. The metal constituting the metal oxide is not particularly limited as long as the oxide has a Mohs hardness of 4 or more. Group 8 elements such as Silicon dioxide is preferred as the inorganic silicon oxide. Examples of the inorganic particles having a Mohs hardness of 4 or more include mineral oxides. Examples of the inorganic particles having a Mohs hardness of 4 or more include iron oxide, copper, quartz, fused quartz (quartz glass), titanium oxide, glass pieces, crystal pieces, magnesium oxide, and sand. The sand consists mainly of hornblende with a Mohs hardness of 5.5, feldspar with a Mohs hardness of 6 and quartz with a Mohs hardness of 7. Therefore, sand has a Mohs hardness of 4 or higher, typically 7. The Mohs hardness is an index of hardness expressed in 10 levels, and the corresponding standard material and the material to be measured are rubbed. It is an evaluated value. The standard materials are, in order from soft (Mohs hardness 1) to hard (Mohs hardness 10), 1: talc, 2: gypsum, 3: calcite, 4: fluorite, 5: apatite, 6: feldspar, 7: quartz. , 8: topaz, 9: corundum, and 10: diamond. To measure the Mohs hardness, two plates with smooth surfaces and known Mohs hardness are prepared, a foreign object to be measured is sandwiched between the two plates, and both plates are rubbed together to check for scratches on the plate surface.
また、前記無機物として、アルミニウム系無機化合物も挙げられる。ここでのアルミニウム系無機化合物とは、アルミニウムを元素として含む任意の無機化合物を意味する。アルミニウム系無機化合物は、アルミニウム元素を含んでおり固体の状態にある。ここで「固体」とは常圧（１気圧）下、且つ、常温（２５℃）の状態で固体の状態にあることを意味している。したがって、固体のアルミニウム系無機化合物の融点は２５℃を超えており、５０℃以上が好ましく、８０℃以上がより好ましく、１００℃以上が更により好ましい。前記固体のアルミニウム系無機化合物のモース硬度は４以上であることが好ましい。固体のアルミニウム系無機化合物の種類は限定されるものではないが、水酸化アルミニウム、酸化アルミニウム、硫酸アルミニウム及びケイ酸アルミニウムからなる群から選択される１種以上を含むものが好ましい。
In addition, an aluminum-based inorganic compound is also mentioned as the inorganic substance. The aluminum-based inorganic compound as used herein means any inorganic compound containing aluminum as an element. The aluminum-based inorganic compound contains aluminum element and is in a solid state. Here, "solid" means being in a solid state under normal pressure (1 atm) and normal temperature (25°C). Therefore, the melting point of the solid aluminum-based inorganic compound exceeds 25°C, preferably 50°C or higher, more preferably 80°C or higher, and even more preferably 100°C or higher. The solid aluminum-based inorganic compound preferably has a Mohs hardness of 4 or more. Although the type of solid aluminum-based inorganic compound is not limited, it preferably contains one or more selected from the group consisting of aluminum hydroxide, aluminum oxide, aluminum sulfate and aluminum silicate.
更に、前記無機物としては、タルクも挙げられる。タルクは「含水ケイ酸マグネシウム」と呼ばれ、化学式は４ＳｉＯ２・３ＭｇＯ・Ｈ２Ｏで表すことができる。化学組成は産地によって多少異なっており、理論値は、ＳｉＯ２ ６４．４％、ＭｇＯ ３１．８％、強熱減量（水分）４．７％の重量比となっている。タルクは滑石とも称される。前記タルクの平均粒子径は特には限定されないが、１～１０μｍが好ましく、１～８μｍがより好ましく、１～６μｍが更により好ましく、１～４μｍが特に好ましい。前記平均粒子径は体積平均粒子径であってよく、例えばレーザー回折・散乱法により測定することができる。前記タルクの表面積は特には限定されないが、ＢＥＴ法による比表面積は１ｍ２／ｇ以上が好ましく、１０ｍ２／ｇ以上がより好ましく、２０ｍ２／ｇ以上が更により好ましい。前記タルクの密度は特には限定されないが、ＪＩＳ Ｋ５１０１に基づく見かけ密度は１ｇ／ｍｌ以下が好ましく、０．８ｇ／ｍｌ以下がより好ましく、０．６ｇ／ｍｌ以下が更により好ましく、０．４ｇ／ｍｌ以下が更により好ましく、０．２ｇ／ｍｌ以下が更により好ましい。
Furthermore, talc is also mentioned as said inorganic substance. Talc is called "hydrated magnesium silicate" and can be represented by a chemical formula of 4SiO2.3MgO.H2O . The chemical composition varies somewhat depending on the production area, and the theoretical value is a weight ratio of 64.4% SiO 2 , 31.8% MgO, and 4.7% loss on ignition (moisture). Talc is also called talc. Although the average particle size of the talc is not particularly limited, it is preferably 1 to 10 μm, more preferably 1 to 8 μm, even more preferably 1 to 6 μm, and particularly preferably 1 to 4 μm. The average particle size may be a volume average particle size and can be measured, for example, by a laser diffraction/scattering method. Although the surface area of the talc is not particularly limited, the specific surface area by the BET method is preferably 1 m 2 /g or more, more preferably 10 m 2 /g or more, and even more preferably 20 m 2 /g or more. The density of the talc is not particularly limited, but the 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, and 0.4 g/ml. ml or less is even more preferred, and 0.2 g/ml or less is even more preferred.
前記有機物としては、例えば、シリコーンが挙げられる。シリコーンとしては、例えば、シリコーン油が挙げられる。シリコーン油は疎水性であり、その分子構造は、環状、直鎖状、分岐状のいずれであってもよい。シリコーン油の２５℃における動粘度は、通常、０．６５～１００，０００ｍｍ２／ｓの範囲であるが、０．６５～１０，０００ｍｍ２／ｓの範囲でもよい。
Examples of the organic matter include silicone. Silicones include, for example, silicone oils. Silicone oil is hydrophobic and its molecular structure may be cyclic, linear or branched. The kinematic viscosity of silicone oil at 25° C. 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.
シリコーン油としては、例えば、直鎖状オルガノポリシロキサン、環状オルガノポリシロキサン、及び、分岐状オルガノポリシロキサンが挙げられる。シリコーン油としては、ジメチルポリシロキサン、ジエチルポリシロキサン、メチルフェニルポリシロキサン、ポリジメチル－ポリジフェニルシロキサンコポリマー、ポリメチル－３，３，３－トリフルオロプロピルシロキサン等が好ましい。シリコーンとしては、ジメチルポリシロキサンが典型的である。本発明のガラス板用合紙に含まれるシリコーンの量は合紙の絶乾質量に対して０．５ｐｐｍ以下であることが好ましく、０．４ｐｐｍ以下であることがより好ましく、０．３ｐｐｍ以下が更により好ましく、０．２ｐｐｍ以下が更により好ましく、０．１ｐｐｍ以下であることが特に好ましい。
Examples of silicone oils include linear organopolysiloxane, cyclic organopolysiloxane, and branched organopolysiloxane. Preferred silicone oils include dimethylpolysiloxane, diethylpolysiloxane, methylphenylpolysiloxane, polydimethyl-polydiphenylsiloxane copolymer, polymethyl-3,3,3-trifluoropropylsiloxane, and the like. A typical silicone is dimethylpolysiloxane. The amount of silicone contained in the glass plate interleaving paper of the present invention is preferably 0.5 ppm or less, more preferably 0.4 ppm or less, and more preferably 0.3 ppm or less relative to the absolute dry mass of the interleaving paper. Even more preferably, 0.2 ppm or less is even more preferable, and 0.1 ppm or less is particularly preferable.
本発明は、ガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とする、ガラス板用合紙からの紙粉発生抑制方法にも関する。
The present invention also relates to a method for suppressing the generation of paper dust from interleaving paper for glass plates, wherein the specific bursting strength of the interleaving paper for glass plates is 1.4 kPa·m 2 /g or more as defined in JIS P8112.
ガラス板の間に合紙を挿入させる給紙作業の際に、給紙作業に使用される各種のローラー等による外力の作用によって紙表面から紙粉が発生すること、そして、ガラス板用合紙の比破裂強さと当該紙粉の発生との逆相関の関係の存在は本発明前は不明であった。また、ガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とすることにより、紙の発生を良好に抑制可能であることも本発明前は不明であった。本発明は、ガラス板用合紙からの紙粉発生抑制の新たな手法を提供するものである。
Paper dust is generated from the paper surface by the action of external force from the various rollers used in the paper feeding operation, and the ratio of interleaving paper for glass panes. Prior to the present invention, the existence of an inverse correlation between bursting strength and generation of paper dust was unknown. In addition, it was unknown before the present invention that the generation of paper can be suppressed satisfactorily by setting the relative bursting strength of interleaving paper for glass plates to 1.4 kPa·m 2 /g or more as defined in JIS P8112. Met. The present invention provides a new technique for suppressing the generation of paper dust from interleaving paper for glass plates.
本発明の紙粉発生抑制方法に関するガラス板用合紙、比破裂強さ等については、本発明のガラス板用合紙に関する上記の説明がそのまま当てはまる。例えば、前記ガラス板用合紙は木材パルプを原料とすることが好ましく、当該木材パルプが古紙パルプを含まないことがより好ましい。また、前記ガラス板用合紙は単層であることが好ましい。
Regarding the interleaving paper for glass plates, the relative bursting strength, etc. related to the method for suppressing the generation of paper dust of the present invention, the above explanations regarding the interleaving paper for glass plates of the present invention apply as they are. For example, the interleaving paper for glass plates is preferably made from wood pulp, and more preferably, the wood pulp does not contain waste paper pulp. Moreover, it is preferable that the said interleaving paper for glass plates is a single layer.
本発明の紙粉発生抑制方法は、表面の清浄性が特に求められる、プラズマディスプレイパネル、液晶ディスプレイパネル（特にＴＦＴ液晶ディスプレイパネル）、有機ＥＬディスプレイパネル等のフラットパネル・ディスプレイ用のガラス板に好適に使用することができる。
The paper dust generation suppression method of the present invention is suitable for glass plates for flat panel displays such as plasma display panels, liquid crystal display panels (especially TFT liquid crystal display panels), organic EL display panels, etc., for which surface cleanliness is particularly required. can be used for
以下、本発明を実施例及び比較例を用いてより具体的に説明するが、本発明の範囲は実施例に限定されるものではない。
The present invention will be described in more detail below using examples and comparative examples, but the scope of the present invention is not limited to the examples.
［実施例１］
木材パルプとして針葉樹晒クラフトパルプ（ＮＢＫＰ）１００質量部を離解して叩解度６００ｍｌｃ．ｓ．ｆ．のパルプスラリーを調製し、長網抄紙機を使用して坪量５０ｇ／ｍ２のガラス板用合紙を作製した。抄紙の条件として、プレスパートのロールプレス圧は、第１プレスが４０ｋｇ／ｃｍ、第２プレス６５ｋｇ／ｃｍ、第３プレス９０ｋｇ／ｃｍに設定した。また、スムーザー圧を４０ｋｇ／ｃｍになるように設定した。 [Example 1]
100 parts by mass of bleached softwood kraft pulp (NBKP) as wood pulp was defiberized to obtain a beating degree of 600 mlc. s. f. was prepared, and a Fourdrinier paper machine was used to produce a glass plate interleaving paper having a basis weight of 50 g/m 2 . As papermaking conditions, the roll press pressure of the press part was set to 40 kg/cm for the first press, 65 kg/cm for the second press, and 90 kg/cm for the third press. Also, the smoother pressure was set to 40 kg/cm.
木材パルプとして針葉樹晒クラフトパルプ（ＮＢＫＰ）１００質量部を離解して叩解度６００ｍｌｃ．ｓ．ｆ．のパルプスラリーを調製し、長網抄紙機を使用して坪量５０ｇ／ｍ２のガラス板用合紙を作製した。抄紙の条件として、プレスパートのロールプレス圧は、第１プレスが４０ｋｇ／ｃｍ、第２プレス６５ｋｇ／ｃｍ、第３プレス９０ｋｇ／ｃｍに設定した。また、スムーザー圧を４０ｋｇ／ｃｍになるように設定した。 [Example 1]
100 parts by mass of bleached softwood kraft pulp (NBKP) as wood pulp was defiberized to obtain a beating degree of 600 mlc. s. f. was prepared, and a Fourdrinier paper machine was used to produce a glass plate interleaving paper having a basis weight of 50 g/m 2 . As papermaking conditions, the roll press pressure of the press part was set to 40 kg/cm for the first press, 65 kg/cm for the second press, and 90 kg/cm for the third press. Also, the smoother pressure was set to 40 kg/cm.
［実施例２］
実施例１で調製されたパルプスラリーに、パルプスラリーに含まれるＮＢＫＰ１００質量部に対して、ポリアミドエピクロロヒドリン系紙力増強剤（商品名：「ＷＳ４０２０」、星光ＰＭＣ社製）を０．４質量部となるように配合した以外は実施例１と同様にして、坪量５０ｇ／ｍ２のガラス板用合紙を作製した。 [Example 2]
To the pulp slurry prepared in Example 1, 0.4 of a polyamide epichlorohydrin-based paper strength agent (trade name: "WS4020", manufactured by Seiko PMC) is added to 100 parts by mass of NBKP contained in the pulp slurry. An interleaving paper for a glass plate having a basis weight of 50 g/m 2 was produced in the same manner as in Example 1 except that the components were blended so as to be parts by mass.
実施例１で調製されたパルプスラリーに、パルプスラリーに含まれるＮＢＫＰ１００質量部に対して、ポリアミドエピクロロヒドリン系紙力増強剤（商品名：「ＷＳ４０２０」、星光ＰＭＣ社製）を０．４質量部となるように配合した以外は実施例１と同様にして、坪量５０ｇ／ｍ２のガラス板用合紙を作製した。 [Example 2]
To the pulp slurry prepared in Example 1, 0.4 of a polyamide epichlorohydrin-based paper strength agent (trade name: "WS4020", manufactured by Seiko PMC) is added to 100 parts by mass of NBKP contained in the pulp slurry. An interleaving paper for a glass plate having a basis weight of 50 g/m 2 was produced in the same manner as in Example 1 except that the components were blended so as to be parts by mass.
［実施例３］
パルプスラリーの叩解度を４２０ｍｌｃ．ｓ．ｆ．とし、プレスパートのロールプレス圧を第１プレス５０ｋｇ／ｃｍ、第２プレス８０ｋｇ／ｃｍ、第３プレス１００ｋｇ／ｃｍに設定した以外は実施例１と同様に坪量５０ｇ／ｍ２のガラス板用合紙を作製した。 [Example 3]
The beating degree of the pulp slurry was 420 mlc. s. f. and the roll press pressure of the press part was set to 50 kg/cm for the first press, 80 kg/cm for the second press, and 100 kg/cm for the third press. A slip sheet was produced.
パルプスラリーの叩解度を４２０ｍｌｃ．ｓ．ｆ．とし、プレスパートのロールプレス圧を第１プレス５０ｋｇ／ｃｍ、第２プレス８０ｋｇ／ｃｍ、第３プレス１００ｋｇ／ｃｍに設定した以外は実施例１と同様に坪量５０ｇ／ｍ２のガラス板用合紙を作製した。 [Example 3]
The beating degree of the pulp slurry was 420 mlc. s. f. and the roll press pressure of the press part was set to 50 kg/cm for the first press, 80 kg/cm for the second press, and 100 kg/cm for the third press. A slip sheet was produced.
［実施例４］
ＮＢＫＰを２質量％になるように水へ分散させ、ダブルディスクリファイナーを用いて平均繊維長が４００μｍになるまで叩解し、さらに高圧ホモジナイザー（エスエムテー製、ＬＡＢ１０００）を用いて７５０ｂａｒの圧力に調整して６回処理することによりセルロースナノファイバーを得た。 [Example 4]
NBKP was dispersed in water to a concentration of 2% by mass, beaten with a double disc refiner until the average fiber length was 400 μm, and further adjusted to a pressure of 750 bar using a high-pressure homogenizer (LAB1000 manufactured by SMT). Cellulose nanofibers were obtained by processing 6 times.
ＮＢＫＰを２質量％になるように水へ分散させ、ダブルディスクリファイナーを用いて平均繊維長が４００μｍになるまで叩解し、さらに高圧ホモジナイザー（エスエムテー製、ＬＡＢ１０００）を用いて７５０ｂａｒの圧力に調整して６回処理することによりセルロースナノファイバーを得た。 [Example 4]
NBKP was dispersed in water to a concentration of 2% by mass, beaten with a double disc refiner until the average fiber length was 400 μm, and further adjusted to a pressure of 750 bar using a high-pressure homogenizer (LAB1000 manufactured by SMT). Cellulose nanofibers were obtained by processing 6 times.
実施例１で調製されたパルプスラリーに、パルプスラリーに含まれるＮＢＫＰ１００質量部に対して、前記セルロースナノファイバーを５質量部、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１２５４、荒川化学工業社製）を０．４質量部となるように混合した以外は実施例１と同様に坪量５０ｇ／ｍ２のガラス板用合紙を得た。
The pulp slurry prepared in Example 1 was added with 5 parts by mass of the cellulose nanofiber for 100 parts by mass of NBKP contained in the pulp slurry, and polyacrylamide (trade name: Polystrone 1254, Arakawa Chemical Industries, Ltd.) as a paper strength agent. A glass plate interleaving paper having a basis weight of 50 g/m 2 was obtained in the same manner as in Example 1, except that 0.4 parts by mass of the product was mixed.
［比較例１］
プレスパートのロールプレス圧は、第１プレスが３０ｋｇ／ｃｍ、第２プレス５５ｋｇ／ｃｍ、第３プレス８０ｋｇ／ｃｍに設定した以外は実施例１と同様に坪量５０ｇ／ｍ２のガラス板用合紙を得た。 [Comparative Example 1]
The roll press pressure in the press part was set to 30 kg/cm for the first press, 55 kg/cm for the second press, and 80 kg/cm for the third press. I got a slip.
プレスパートのロールプレス圧は、第１プレスが３０ｋｇ／ｃｍ、第２プレス５５ｋｇ／ｃｍ、第３プレス８０ｋｇ／ｃｍに設定した以外は実施例１と同様に坪量５０ｇ／ｍ２のガラス板用合紙を得た。 [Comparative Example 1]
The roll press pressure in the press part was set to 30 kg/cm for the first press, 55 kg/cm for the second press, and 80 kg/cm for the third press. I got a slip.
［比較例２］
実施例１で調製されたパルプスラリーに、パルプスラリーに含まれるＮＢＫＰ１００質量部に対して、ポリエチレンテレフタレート繊維（繊維長３ｍｍカット）を２０質量部混合し、長網抄紙機を使用した以外は実施例１と同様に坪量５０ｇ／ｍ２のガラス板用合紙を得た。 [Comparative Example 2]
The pulp slurry prepared in Example 1 was mixed with 100 parts by mass of NBKP contained in the pulp slurry, and 20 parts by mass of polyethylene terephthalate fiber (fiber length 3 mm cut) was mixed, and a Fourdrinier machine was used. An interleaving paper for a glass plate having a basis weight of 50 g/m 2 was obtained in the same manner as in No. 1.
実施例１で調製されたパルプスラリーに、パルプスラリーに含まれるＮＢＫＰ１００質量部に対して、ポリエチレンテレフタレート繊維（繊維長３ｍｍカット）を２０質量部混合し、長網抄紙機を使用した以外は実施例１と同様に坪量５０ｇ／ｍ２のガラス板用合紙を得た。 [Comparative Example 2]
The pulp slurry prepared in Example 1 was mixed with 100 parts by mass of NBKP contained in the pulp slurry, and 20 parts by mass of polyethylene terephthalate fiber (fiber length 3 mm cut) was mixed, and a Fourdrinier machine was used. An interleaving paper for a glass plate having a basis weight of 50 g/m 2 was obtained in the same manner as in No. 1.
［比破裂強さ］
実施例１～４及び比較例１～２のガラス板用合紙の比破裂強さをＪＩＳ Ｐ８１１２に準拠して測定した。 [Relative burst strength]
The specific bursting strength of the interleaving paper for glass plates of Examples 1 to 4 and Comparative Examples 1 and 2 was measured according to JIS P8112.
実施例１～４及び比較例１～２のガラス板用合紙の比破裂強さをＪＩＳ Ｐ８１１２に準拠して測定した。 [Relative burst strength]
The specific bursting strength of the interleaving paper for glass plates of Examples 1 to 4 and Comparative Examples 1 and 2 was measured according to JIS P8112.
［摩耗試験］
実施例１～４及び比較例１～２のガラス板用合紙について摩耗試験を実施した。摩耗試験はＪＩＳ Ｐ８１３６：１９９４に準じた板紙耐摩耗試験機（熊谷理機工業社製）を用いて、１組のガラス板用合紙の上から５００ｇｆの荷重をかけて毎分３０往復の速度にて紙の表裏面が接触摩擦するように往復摺動させた。摺動回数５往復後のガラス板用合紙表面の紙剥けおよび紙表面からの紙粉の発生を目視により確認して下記の基準により評価した。
◎：紙剥けが発生せず、紙粉の発生も無かった
〇：紙剥けは発生しなかったが、紙粉が僅かに発生した
×：紙剥け及び紙粉が発生した（紙剥けに伴う破断が発生する場合もあった）
結果を表１に示す。 [Abrasion test]
Abrasion tests were carried out on the interleaving papers for glass plates of Examples 1-4 and Comparative Examples 1-2. The abrasion test was performed using a paperboard abrasion resistance tester (manufactured by Kumagai Riki Kogyo Co., Ltd.) in accordance with JIS P8136: 1994, and a load of 500 gf was applied from a set of interleaving paper for glass plates at a speed of 30 reciprocations per minute. was slid back and forth so that the front and back surfaces of the paper were brought into contact and friction with each other. After 5 reciprocations of sliding, peeling of paper on the surface of interleaving paper for a glass plate and generation of paper dust from the surface of the paper were visually observed and evaluated according to the following criteria.
◎: Paper peeling did not occur and paper dust did not occur ○: Paper peeling did not occur, but paper dust was slightly generated ×: Paper peeling and paper dust occurred sometimes occurred)
Table 1 shows the results.
実施例１～４及び比較例１～２のガラス板用合紙について摩耗試験を実施した。摩耗試験はＪＩＳ Ｐ８１３６：１９９４に準じた板紙耐摩耗試験機（熊谷理機工業社製）を用いて、１組のガラス板用合紙の上から５００ｇｆの荷重をかけて毎分３０往復の速度にて紙の表裏面が接触摩擦するように往復摺動させた。摺動回数５往復後のガラス板用合紙表面の紙剥けおよび紙表面からの紙粉の発生を目視により確認して下記の基準により評価した。
◎：紙剥けが発生せず、紙粉の発生も無かった
〇：紙剥けは発生しなかったが、紙粉が僅かに発生した
×：紙剥け及び紙粉が発生した（紙剥けに伴う破断が発生する場合もあった）
結果を表１に示す。 [Abrasion test]
Abrasion tests were carried out on the interleaving papers for glass plates of Examples 1-4 and Comparative Examples 1-2. The abrasion test was performed using a paperboard abrasion resistance tester (manufactured by Kumagai Riki Kogyo Co., Ltd.) in accordance with JIS P8136: 1994, and a load of 500 gf was applied from a set of interleaving paper for glass plates at a speed of 30 reciprocations per minute. was slid back and forth so that the front and back surfaces of the paper were brought into contact and friction with each other. After 5 reciprocations of sliding, peeling of paper on the surface of interleaving paper for a glass plate and generation of paper dust from the surface of the paper were visually observed and evaluated according to the following criteria.
◎: Paper peeling did not occur and paper dust did not occur ○: Paper peeling did not occur, but paper dust was slightly generated ×: Paper peeling and paper dust occurred sometimes occurred)
Table 1 shows the results.
Claims (15)
- ＪＩＳ Ｐ８１１２で規定される比破裂強さが１．４ｋＰａ・ｍ２／ｇ以上である、ガラス板用合紙。 An interleaving paper for glass plates, having a specific bursting strength of 1.4 kPa·m 2 /g or more as defined in JIS P8112.
- 木材パルプを原料とする、請求項１記載のガラス板用合紙。 The interleaving paper for glass plates according to claim 1, which uses wood pulp as a raw material.
- 前記木材パルプが古紙パルプを含まない、請求項２記載のガラス板用合紙。 The interleaving paper for glass plates according to claim 2, wherein the wood pulp does not contain waste paper pulp.
- 単層である、請求項１乃至３のいずれかに記載のガラス板用合紙。 The interleaving paper for glass plates according to any one of claims 1 to 3, which is a single layer.
- 前記ガラス板がディスプレイ用である、請求項１乃至４のいずれかに記載のガラス板用合紙。 The interleaving paper for a glass plate according to any one of claims 1 to 4, wherein the glass plate is for a display.
- 前記ディスプレイがＴＦＴ液晶ディスプレイ又は有機ＥＬディスプレイである、請求項５記載のガラス板用合紙。 The interleaving paper for glass plates according to claim 5, wherein the display is a TFT liquid crystal display or an organic EL display.
- 前記ガラス板の表面にカラーフィルターが形成される、請求項６記載のガラス板用合紙。 The interleaving paper for a glass plate according to claim 6, wherein a color filter is formed on the surface of the glass plate.
- 請求項１乃至７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。 A laminate comprising the glass plate interleaving paper according to any one of claims 1 to 7 and a glass plate.
- ガラス板用合紙のＪＩＳ Ｐ８１１２で規定される比破裂強さを１．４ｋＰａ・ｍ２／ｇ以上とする、ガラス板用合紙からの紙粉発生抑制方法。 A method for suppressing the generation of paper dust from interleaving paper for glass plates, wherein the interleaving paper for glass plates has a specific burst strength defined by JIS P8112 of 1.4 kPa·m 2 /g or more.
- 前記ガラス板用合紙が木材パルプを原料とする、請求項９記載の方法。 The method according to claim 9, wherein the interleaving paper for glass plates is made from wood pulp.
- 前記木材パルプが古紙パルプを含まない、請求項１０記載の方法。 The method of claim 10, wherein said wood pulp does not contain waste paper pulp.
- 前記ガラス板用合紙が単層である、請求項９乃至１１のいずれかに記載の方法。 The method according to any one of claims 9 to 11, wherein the interleaving paper for glass plates is a single layer.
- 前記ガラス板が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方法。 The method according to any one of claims 9 to 12, wherein said glass plate is for a display.
- 前記ディスプレイがＴＦＴ液晶ディスプレイ又は有機ＥＬディスプレイである請求項１３記載の方法。 The method according to claim 13, wherein said display is a TFT liquid crystal display or an organic EL display.
- 前記ガラス板の表面にカラーフィルターが形成される、請求項１４記載の方法。 The method according to claim 14, wherein a color filter is formed on the surface of said glass plate.
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