JP2005133258A - Liner for corrugated board - Google Patents
Liner for corrugated board Download PDFInfo
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- JP2005133258A JP2005133258A JP2003372419A JP2003372419A JP2005133258A JP 2005133258 A JP2005133258 A JP 2005133258A JP 2003372419 A JP2003372419 A JP 2003372419A JP 2003372419 A JP2003372419 A JP 2003372419A JP 2005133258 A JP2005133258 A JP 2005133258A
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- Prior art keywords
- liner
- layer
- cardboard
- corrugated
- corrugated board
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- 239000010410 layer Substances 0.000 claims abstract description 82
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 34
- 239000002344 surface layer Substances 0.000 claims abstract description 22
- 239000011436 cob Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 35
- 238000004513 sizing Methods 0.000 claims description 26
- 239000000853 adhesive Substances 0.000 abstract description 33
- 230000001070 adhesive effect Effects 0.000 abstract description 33
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 239000007864 aqueous solution Substances 0.000 abstract description 15
- 239000000126 substance Substances 0.000 abstract description 10
- 238000010030 laminating Methods 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 26
- 229920002472 Starch Polymers 0.000 description 13
- 239000008107 starch Substances 0.000 description 13
- 235000019698 starch Nutrition 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003292 glue Substances 0.000 description 6
- 239000002655 kraft paper Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 239000003623 enhancer Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 4
- 240000003183 Manihot esculenta Species 0.000 description 4
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 4
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 4
- 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 4
- -1 polyethylene Polymers 0.000 description 4
- 239000011122 softwood Substances 0.000 description 4
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000011121 hardwood Substances 0.000 description 3
- 239000010893 paper waste Substances 0.000 description 3
- 239000002025 wood fiber Substances 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000005476 size effect Effects 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000004328 sodium tetraborate Substances 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920002972 Acrylic fiber Polymers 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
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000218631 Coniferophyta Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- XLLZUKPXODPNPP-UHFFFAOYSA-N [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-].[O-]B([O-])[O-] XLLZUKPXODPNPP-UHFFFAOYSA-N 0.000 description 1
- 229920006322 acrylamide copolymer Polymers 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229920006319 cationized starch Polymers 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 239000002939 oilproofing Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000013053 water resistant agent Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Wrappers (AREA)
- Paper (AREA)
Abstract
Description
本発明は、段ボール用ライナーに関する。特には、薬品を使用することなく、中芯と段ボール用ライナーとを接着させる際に、接着剤の水溶液の水分が段ボール用ライナーの表面に達するのを防止し、中芯と段ボール用ライナーとを貼り合わせる速度を向上させることができ、生産ラインの高速化を可能とする段ボール用ライナーを提供することにある。 The present invention relates to a liner for cardboard. In particular, when the core and the cardboard liner are bonded without using chemicals, the moisture of the adhesive aqueous solution is prevented from reaching the surface of the cardboard liner. An object of the present invention is to provide a corrugated liner that can improve the bonding speed and can increase the production line speed.
段ボールシートは、波状に段繰られた（コルゲート加工された）中芯の両側に、澱粉糊やＰＶＡ等の接着剤を用いてライナーを貼合することによって製造されている。両面段ボールシートを製造する場合は、シングルフェーサー部で中芯を段付成形して、裏ライナーと貼り合わせて片面段ボールを形成し、ダブルフェーサー部で中芯の反対側段頂に表ライナーを貼り合わせて、両面段ボールが製造されている。 Corrugated cardboard sheets are manufactured by laminating liners on both sides of a corrugated core (corrugated) using an adhesive such as starch paste or PVA. When manufacturing double-sided corrugated cardboard sheets, the core is stepped and formed on the single facer part and bonded to the back liner to form a single-sided cardboard, and the front liner on the opposite side of the core is formed on the double facer part. Are laminated to produce a double-sided cardboard.
段ボールシートの製造においては、中芯とライナーとの初期接着強度が生産速度に影響を及ぼすことが多い。接着剤として澱粉糊を用いる場合、澱粉糊を水溶液とし、この水溶液を中芯の段頂に塗布するのが通常である。中芯とライナーとが貼り合わされた後、ヒーターにより１２０〜１６０℃程度の温度に加熱され、中芯の段頂に塗布された澱粉糊がゲル化されるとともに、澱粉糊の水溶液の水分が蒸発し、中芯とライナーとの接着が行われる。中芯とライナーとの接着強度を向上させるためには、澱粉糊の水溶液をライナーの裏面に十分に吸収させて中芯とライナーとを接着させる必要がある。 In the production of corrugated cardboard sheets, the initial adhesive strength between the core and the liner often affects the production rate. When using starch paste as an adhesive, it is usual to use starch paste as an aqueous solution and apply this aqueous solution to the top of the core. After the core and liner are bonded, the heater is heated to a temperature of about 120 to 160 ° C., and the starch paste applied to the top of the core is gelled, and the water content of the starch paste aqueous solution evaporates. Then, the core and the liner are bonded. In order to improve the adhesive strength between the core and the liner, it is necessary to sufficiently absorb the starch paste aqueous solution on the back surface of the liner to bond the core and the liner.
中芯とライナーとの貼合速度を高速にすると、ヒーターによる熱量が不足して澱粉糊のゲル化が不十分であったり、澱粉糊の水溶液の水分の蒸発が十分でなく、乾燥が不十分になり、中芯とライナーとの貼り合わせ、すなわち初期接着強度が不十分となる。初期接着強度が不十分であると、折り目のための罫線を入れたり、段ボールシートを所定の大きさに切断する際に、ライナーと中芯とが剥離を生じる場合がある。このようなトラブルの発生を防止するためには、中芯とライナーとの貼合速度を減速することで対応しなければならず、生産効率の低下が問題となる。 If the bonding speed between the core and the liner is increased, the amount of heat generated by the heater is insufficient and the starch paste is not sufficiently gelled, or the water content of the starch paste aqueous solution is not sufficiently evaporated, resulting in insufficient drying. Thus, the bonding between the core and the liner, that is, the initial adhesive strength becomes insufficient. If the initial adhesive strength is insufficient, the liner may be peeled off from the core when a ruled line for a crease is inserted or the cardboard sheet is cut into a predetermined size. In order to prevent the occurrence of such trouble, it is necessary to respond by reducing the bonding speed between the core and the liner, which causes a problem of a decrease in production efficiency.
このように、中芯とライナーとの初期接着強度は、段ボールシートの製造上、きわめて重要な品質の一つと言える。貼合速度を上昇させた場合でも十分な初期接着強度を得るための開発が進められている。例えば、特開平７−１９５６４８号公報には、苛性ソーダ又は苛性カリを含有する貼合速度向上剤を塗布した段ボール用原紙が開示されている。また、特開平７−１００９７７号公報には、ライナー原紙及び中芯の一方又は両方の貼り合わせ面のｐＨを、硼砂、苛性ソーダ等によって６〜１０とする段ボールの製造方法が開示されている。また、特開平７−２９０６２２号公報には、ライナー及び中芯の少なくとも一方の面に八硼酸ナトリウムからなる硼素化合物が塗工されている段ボールシートが開示されている。また、特開平７−２３８２６３号公報には、多価アルコール水溶液に硼砂を溶解させた段ボールシート貼合速度向上剤を使用する段ボールシートの製造方法が開示されている。 Thus, it can be said that the initial adhesive strength between the core and the liner is one of the extremely important qualities in the production of the corrugated cardboard sheet. Development is underway to obtain sufficient initial bond strength even when the bonding speed is increased. For example, Japanese Patent Application Laid-Open No. 7-195648 discloses a base paper for corrugated board coated with a bonding speed improver containing caustic soda or caustic potash. Japanese Laid-Open Patent Publication No. 7-100977 discloses a corrugated board manufacturing method in which the pH of one or both of the liner base paper and the core is 6 to 10 with borax, caustic soda, or the like. Japanese Patent Application Laid-Open No. 7-290622 discloses a corrugated cardboard sheet in which a boron compound composed of sodium octaborate is coated on at least one surface of a liner and a core. Japanese Patent Application Laid-Open No. 7-238263 discloses a method for producing a corrugated cardboard sheet using a corrugated cardboard sheet bonding speed improver in which borax is dissolved in a polyhydric alcohol aqueous solution.
上記公報に開示された段ボールシート等を用いることにより、又は上記公報に開示された段ボールシートの製造方法によれば、段ボール貼合時の初期接着強度を向上させることができる。しかしながら、上記公報に開示された方法等においては、ライナー又は中芯の表面に薬品を塗工する等によって段ボール貼合時の初期接着強度を向上させている。このように、薬品を使用しているため、薬品をライナー又は中芯の表面に塗工する工程を必要とし、工程が煩雑になるばかりでなく、接着に関係ない部分にも薬品が塗工されるので経済的ではないという問題がある。 By using the corrugated cardboard sheet disclosed in the above publication, or according to the corrugated cardboard manufacturing method disclosed in the above publication, the initial adhesive strength at the time of corrugated board bonding can be improved. However, in the method disclosed in the above publication, the initial adhesive strength at the time of corrugated cardboard bonding is improved by applying a chemical to the surface of the liner or the core. In this way, since chemicals are used, a process for applying the chemicals to the surface of the liner or core is required, which not only makes the process complicated, but also applies chemicals to parts not related to adhesion. Therefore, there is a problem that it is not economical.
従って、本発明の目的は、薬品を使用することなく、中芯と段ボール用ライナーとを接着させる際に、接着剤の水溶液の水分が段ボール用ライナーの表面に達することを防止し、中芯と段ボール用ライナーとを貼り合わせる速度を向上させることができ、生産ラインの高速化を可能とする段ボール用ライナーを提供することにある。 Therefore, the object of the present invention is to prevent the moisture of the aqueous solution of the adhesive from reaching the surface of the corrugated liner when the core and the corrugated liner are bonded without using chemicals. An object of the present invention is to provide a corrugated board liner that can improve the speed at which the corrugated board liner is bonded to the corrugated board liner, and that can speed up the production line.
本発明者らは、上記目的を達成すべく鋭意検討した結果、３層以上の多層構造を有する段ボール用ライナーの初期吸水性を高めることにより、すなわち、３層以上の多層構造を有する段ボール用ライナーにおいて、坪量を特定の範囲とするとともに、坪量と、ＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒におけるコッブ吸水度との関係を特定することにより、中芯と段ボール用ライナーとを接触させる際に、接着剤の水溶液の水分が段ボール用ライナーの表面に達することを防止し、乾燥を速やかに行うことができ、中芯と段ボール用ライナーとを貼り合わせる速度を向上させることができることを見出し、本発明を完成させた。 As a result of intensive studies to achieve the above object, the present inventors have improved the initial water absorption of a cardboard liner having a multilayer structure of three or more layers, that is, a cardboard liner having a multilayer structure of three or more layers. In the above, the basis weight is set to a specific range, and the relationship between the basis weight and the Cobb water absorption at a contact time of 10 seconds as defined in JIS-P8140 is used to bring the core and the corrugated board liner into contact with each other. The water content of the adhesive aqueous solution can be prevented from reaching the surface of the corrugated liner, and can be quickly dried, and the speed at which the core and the corrugated liner are bonded can be improved. The headline and the present invention were completed.
本発明は上記知見に基づいてなされたものであり、少なくとも、表層、中層及び裏層の３層以上の多層構造を有する段ボール用ライナーであって、坪量が１００〜３００ｇ／ｍ２であり、上記坪量を（Ａ）ｇ／ｍ２とし、前記裏層面のＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒におけるコッブ吸水度を（Ｂ）ｇ／ｍ２とした場合、Ｂ／Ａが０．７〜２．５であることを特徴とする段ボール用ライナーを提供するものである。
上記段ボール用ライナーを用いて段ボールシートを製造する場合、生産ラインの高速化が可能となる。
The present invention has been made based on the above findings, and is a liner for cardboard having a multilayer structure of at least three layers of a surface layer, a middle layer and a back layer, and has a basis weight of 100 to 300 g / m 2 . When the basis weight is (A) g / m 2 and the Cobb water absorption at a contact time of 10 seconds defined by JIS-P8140 of the back layer surface is (B) g / m 2 , B / A is 0. The present invention provides a corrugated liner, characterized in that it is 7 to 2.5.
When a corrugated sheet is produced using the corrugated liner, the production line can be speeded up.
上記段ボール用ライナーは、ＪＩＳ−Ｐ８１４０で規定される、接触時間１２０秒におけるコッブ吸水度を（Ｃ）ｇ／ｍ２とした場合、Ｃ／Ｂが１．０〜２．０であることが好ましい。
上記段ボール用ライナーは、少なくとも、表層、中層及び裏層からなり、該裏層に内添サイズ剤が実質的に含有されていないことが好ましい。
The above cardboard liner preferably has a C / B of 1.0 to 2.0 when the Cobb water absorption at a contact time of 120 seconds as defined in JIS-P8140 is (C) g / m 2. .
The cardboard liner is preferably composed of at least a surface layer, an intermediate layer and a back layer, and the back layer preferably contains substantially no internal sizing agent.
本発明の段ボール用ライナーを用いて段ボールの製造を行った場合、中芯と段ボール用ライナーとを接着させる際に、接着剤の水溶液の水分が段ボール用ライナーの表面に達するのを防止し、中芯と段ボール用ライナーとを貼り合わせる速度が向上し、生産ラインの高速化が可能となる。 When the corrugated board liner is produced using the corrugated board liner of the present invention, when the core and the corrugated board liner are bonded, the moisture of the aqueous solution of the adhesive is prevented from reaching the surface of the corrugated board liner. The speed at which the core and the corrugated board liner are bonded is improved, and the production line can be speeded up.
以下、本発明の段ボール用ライナーについて説明する。
本発明の段ボール用ライナーは、少なくとも、表層、中層及び裏層の３層以上の多層構造を有する段ボール用ライナーである。
本発明の段ボール用ライナーを製造する際に用いられる繊維素材としては、広葉樹晒クラフトパルプ、針葉樹晒クラフトパルプ、広葉樹未晒クラフトパルプ、針葉樹未晒クラフトパルプ、広葉樹亜硫酸パルプ、針葉樹亜硫酸パルプ等が挙げられる。また、木材繊維を含む主原料として、化学的に処理されたパルプ、木材以外の繊維原料であるケナフ、麻、葦等非木材繊維を主原料として化学的に処理されたパルプやチップを機械的にパルプ化したグランドパルプ、木材またはチップに化学薬品を添加しながら機械的にパルプ化したケミグランドパルプ、及びチップを柔らかくなるまで蒸解した後、レファイナー等でパルプ化したセミケミカルパルプ等のバージンパルプ及び、段ボールや新聞紙、チラシ等の古紙のほか、塗工紙、非塗工紙、地券、カラー印刷された紙、白黒印刷された紙など種々の耐漂白性を有する紙を含む雑誌古紙などをも使用することができる。
The cardboard liner of the present invention will be described below.
The liner for corrugated board of the present invention is a corrugated board liner having a multilayer structure of at least three layers of a surface layer, an intermediate layer and a back layer.
Examples of the fiber material used for producing the liner for corrugated board of the present invention include hardwood bleached kraft pulp, softwood bleached kraft pulp, hardwood unbleached kraft pulp, softwood unbleached kraft pulp, hardwood sulfite pulp, conifer sulfite pulp and the like It is done. The main raw materials containing wood fibers are mechanically treated pulp and chips that are chemically treated with non-wood fibers such as kenaf, hemp, and straw, which are chemically processed pulps, and non-wood fiber materials. Virgin pulp, such as ground pulp, pulp that has been mechanically pulped with chemicals added to wood or chips, and semi-chemical pulp that has been digested to soften the chips and then pulped with a refiner In addition to used paper such as corrugated cardboard, newspaper, and flyers, old magazine paper including various types of bleach-resistant paper such as coated paper, non-coated paper, territory paper, color printed paper, black and white printed paper, etc. Can also be used.
また、上述した植物繊維にポリエチレン、ポリプロピレン等を原料とした、合成パルプ等を混合させたものや、合成パルプの他にもレーヨン繊維、アクリル繊維、ポリアミド繊維等の有機繊維、ガラス繊維、炭素繊維等の各種繊維を配合することも可能である。 In addition, the above-mentioned plant fibers made of polyethylene, polypropylene, etc. as raw materials, mixed with synthetic pulp, etc. In addition to synthetic pulp, organic fibers such as rayon fibers, acrylic fibers, polyamide fibers, glass fibers, carbon fibers It is also possible to mix various fibers such as.
本発明の段ボール用ライナーは３層以上の多層構造を有するものであり、少なくとも表層、中層及び裏層からなる。また、本発明の段ボール用ライナーは４層以上の多層構造を有するものであってもよく、層の数に限定はなく、例えば上述した３層構造のものだけでなく、表層及び中層の間に表下層を設けてもよい。また、本発明の段ボール用ライナーは、上述した３層構造を有するもの、４層構造を有するものだけでなく、５層以上の構造を有する段ボール用ライナーも含まれる。 The cardboard liner of the present invention has a multilayer structure of three or more layers, and comprises at least a surface layer, a middle layer and a back layer. Further, the cardboard liner of the present invention may have a multilayer structure of four or more layers, and the number of layers is not limited. For example, not only the above-mentioned three-layer structure but also between the surface layer and the middle layer. An under layer may be provided. The cardboard liner of the present invention includes not only those having the above-mentioned three-layer structure and those having a four-layer structure, but also cardboard liners having a structure of five or more layers.
本発明の段ボール用ライナーの坪量は１００〜３００ｇ／ｍ２であり、好ましくは１２０〜２８０ｇ／ｍ２である。坪量が１００ｇ／ｍ２より低いと段ボールシートに加工すると波打ちが発生するため外観が悪くなり、３００ｇ／ｍ２を超えるとコルゲーターで高速で貼合する際に糊の乾燥熱量が不足してライナーと中芯の初期接着強度が低下する問題がある。 The basis weight of the liner for corrugated board of the present invention is 100 to 300 g / m 2 , preferably 120 to 280 g / m 2 . The basis weight is poor appearance because waviness is generated and processed in the cardboard sheet is lower than 100 g / m 2, insufficient drying heat of glue when laminating at high speed corrugator exceeds 300 g / m 2 Liner There is a problem that the initial adhesive strength of the core decreases.
本発明の段ボール用ライナーは、坪量を（Ａ）ｇ／ｍ２とし、ＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒におけるコッブ吸水度を（Ｂ）ｇ／ｍ２とした場合、Ｂ／Ａが ０．７〜２．５であり、好ましくは０．７〜１．８である。Ｂ／Ａが０．７未満であると段ボール用ライナーと中芯とを接着させる際に、接着剤の水溶液が段ボール用ライナーに吸収されず、このため、接着強度が不足して段ボール用ライナーと中芯との初期接着強度が低下する。一方、２．５を超えると、段ボール用ライナーが糊の水溶液を大量に吸収してしまうため、ライナーと中芯の接着部分に糊が残らないため、初期接着強度が低下する。 The liner for corrugated board of the present invention has a basis weight of (A) g / m 2 and a Cobb water absorption at a contact time of 10 seconds as defined by JIS-P8140 is (B) g / m 2. A is 0.7 to 2.5, preferably 0.7 to 1.8. When the B / A is less than 0.7, when the corrugated liner and the core are bonded, the aqueous solution of the adhesive is not absorbed by the corrugated liner. The initial adhesive strength with the core decreases. On the other hand, if it exceeds 2.5, the corrugated liner absorbs a large amount of an aqueous solution of glue, and no glue remains on the bonded portion between the liner and the core, resulting in a decrease in initial adhesive strength.
なお、本明細書において、「コッブ吸水度」とは、紙の吸水性を示す値であり、ＪＩＳ−Ｐ８１４０で規定される方法によって測定した値である。具体的には、段ボール用ライナーの裏面（ここで、裏面とは、段ボールシートを製造する際に、中芯と接着される側の面を意味する。）に円状のゴムパッキン等により１０ｃｍ２になるように区切り、そこにライナーの裏面が覆われる程度の水を載せ、１０秒（又は１２０秒）保持し、段ボール用ライナーの初期の重量と、１０秒（又は１２０秒）経過後の重量とを比較し、１ｍ２あたりの吸水度を計算し、吸水性を測定する。
なお、コッブ吸水度が大きければ吸水性が高く、コッブ吸水度が小さければ吸水性が低いといえる。
In the present specification, “Cobb water absorption” is a value indicating the water absorption of paper, and is a value measured by a method defined in JIS-P8140. Specifically, the back surface of the liner for cardboard (here, the back surface means the surface bonded to the core when the corrugated cardboard sheet is manufactured) is 10 cm 2 with a circular rubber packing or the like. And put the water so that the back of the liner is covered, hold for 10 seconds (or 120 seconds), the initial weight of the cardboard liner and the weight after 10 seconds (or 120 seconds) And the water absorption per 1 m 2 is calculated and the water absorption is measured.
If the Cobb water absorption is large, the water absorption is high, and if the Cobb water absorption is small, the water absorption is low.
また、本発明の段ボール用ライナーは、ＪＩＳ−Ｐ８１４０で規定される、接触時間１２０秒におけるコッブ吸水度を（Ｃ）ｇ／ｍ２とした場合、Ｃ／Ｂが１．０〜 ２．０であることが好ましい。Ｃ／Ｂが２以上であると、段ボール表面に糊の水溶液が達してしまい、段ボールシートの外観を悪くする。 The corrugated liner of the present invention has a C / B of 1.0 to 2.0 when the Cobb water absorption at a contact time of 120 seconds as defined in JIS-P8140 is (C) g / m 2. Preferably there is. When C / B is 2 or more, the paste aqueous solution reaches the surface of the corrugated cardboard, which deteriorates the appearance of the corrugated cardboard sheet.
ＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒、又は１２０秒におけるコッブ吸水度と、段ボール用ライナーの坪量との関係を上記範囲内とする手段としては、段ボール用ライナーを構成する各層に含有させる内添サイズ剤の含有量を調整することによって実施することができる。 As a means to make the relationship between the Cobb water absorbency at 10 seconds or 120 seconds of contact time and the basis weight of the corrugated liner defined in JIS-P8140, contained in each layer constituting the corrugated liner. It can be carried out by adjusting the content of the internally added sizing agent.
本発明の段ボール用ライナーの坪量（Ａ）、ＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒におけるコッブ吸水度（Ｂ）、及びＪＩＳ−Ｐ８１４０で規定される、接触時間１２０秒におけるコッブ吸水度（Ｃ）との関係について具体例を示すと、段ボール用ライナーの坪量が２８０ｇ／ｍ２の場合、ＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒におけるコッブ吸水度（Ｂ）は、２００〜４５０ｇ／ｍ２程度であり、ＪＩＳ−Ｐ８１４０で規定される、接触時間１２０秒におけるコッブ吸水度（Ｃ）は、２５０〜６５０ｇ／ｍ２程度である。 Basis weight of the liner for corrugated board of the present invention (A), Cobb water absorption at a contact time of 10 seconds (B) defined by JIS-P8140, and Cobb water absorption at a contact time of 120 seconds defined by JIS-P8140 When a specific example is shown about the relationship with (C), when the basis weight of the liner for corrugated board is 280 g / m 2 , the Cobb water absorption (B) at a contact time of 10 seconds defined by JIS-P8140 is 200 to was 450 g / m 2 approximately, as defined by JIS-P8140, the contact time Cobb water absorption at 120 seconds (C) is about 250~650g / m 2.
本発明の段ボール用ライナーを構成する各層には、何れも、段ボール用ライナーを製造する際に用いられる添加剤を添加してもよい。このような添加剤としては、例えばポリアクリルアミド、ポリビニルアルコール系高分子、尿素／ホルマリン樹脂、メラミン／ホルマリン樹脂、澱粉等の紙力増強剤；硫酸バンド等の薬品定着剤、ポリアクリルアミド、アクリルアミド／アミノメチルアクリルアミドの共重合物の塩、カチオン化澱粉、ポリエチレンイミン、ポリエチレンオキサイド、アクリルアミド／アクリル酸ナトリウム共重合物等の濾水性あるいは歩留まり向上剤；ポリアミド、ポリアミン、エピクロルヒドリン等の耐水化剤；消泡剤、タルク等の填料；染料；スライムコントロール剤；抗菌剤；紫外線防止剤、防滑剤、滑剤、耐油剤、撥油剤、耐光・耐候性付与剤等が挙げられる。 Any of the layers constituting the corrugated board liner of the present invention may be added with an additive used when producing the corrugated board liner. Such additives include, for example, polyacrylamide, polyvinyl alcohol polymers, urea / formalin resin, melamine / formalin resin, paper strength enhancers such as starch; chemical fixing agents such as sulfuric acid bands, polyacrylamide, acrylamide / amino. Freeness or yield improver such as methyl acrylamide copolymer salt, cationized starch, polyethyleneimine, polyethylene oxide, acrylamide / sodium acrylate copolymer; water-resistant agent such as polyamide, polyamine, epichlorohydrin; antifoaming agent And fillers such as talc; dyes; slime control agents; antibacterial agents; anti-ultraviolet agents, anti-slip agents, lubricants, oil-proofing agents, oil-repellents, and light and weather resistance-imparting agents.
本発明の段ボール用ライナーの具体例としては、例えば、少なくとも、表層、中層及び裏層からなり、該裏層にサイズ剤が実質的に含有されていないものが挙げられる。本発明の段ボール用ライナーとしては、表層及び中層の間に表下層が形成されているものが好ましい。すなわち、表層、表下層、中層及び裏層の４層構造からなるものが挙げられる。 Specific examples of the liner for corrugated board of the present invention include, for example, those comprising at least a surface layer, an intermediate layer and a back layer, and the back layer substantially not containing a sizing agent. As the liner for corrugated board of the present invention, those having a surface lower layer formed between a surface layer and an intermediate layer are preferable. That is, what consists of 4 layer structure of a surface layer, a surface lower layer, a middle layer, and a back layer is mentioned.
本発明の段ボール用ライナーは、裏層に内添サイズ剤を実質的に含有しないことが好ましい。裏層に内添サイズ剤を含有しないことにより、本発明の段ボール用ライナーの初期吸水性を高めることが可能となる。さらに中層には内添サイズ剤を含有していることが好ましい。すなわち、裏層に内添サイズ剤を含有させないで中層に内添サイズ剤を含有させることによって、坪量を（Ａ）ｇ／ｍ２とし、ＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒におけるコッブ吸水度を（Ｂ）ｇ／ｍ２とした場合、Ｂ／Ａを０．７〜２．５の範囲とすることができる。また、表層、表下層には内添サイズ剤を含有していることが好ましい。表層、表下層、中層に内添サイズ剤を含有することにより、接着剤の水溶液中の水分が表層に浸入するのが防止でき、長時間吸水性を低下させることができる。すなわち、ＪＩＳ−Ｐ８１４０で規定される、接触時間１２０秒におけるコッブ吸水度を（Ｃ）ｇ／ｍ２とした場合、Ｃ／Ｂを１．０〜２．０の範囲とすることができる。
特に好ましくは、表層のサイズ効果を最も高くして、表層、表下層、中層の順にサイズ効果が低くなるように内添サイズ剤の添加量を調整することにより、経済的に本発明の段ボール用ライナーを得ることができる。
The liner for corrugated board of the present invention preferably contains substantially no internal sizing agent in the back layer. By not containing the internal sizing agent in the back layer, it becomes possible to increase the initial water absorption of the cardboard liner of the present invention. Further, the middle layer preferably contains an internal sizing agent. That is, by adding the internal sizing agent to the middle layer without containing the internal sizing agent in the back layer, the basis weight is (A) g / m 2 and the contact time is 10 seconds as defined in JIS-P8140. When Cobb water absorption is (B) g / m 2 , B / A can be in the range of 0.7 to 2.5. Moreover, it is preferable that an internal sizing agent is contained in the surface layer and the surface lower layer. By containing the internal sizing agent in the surface layer, the surface lower layer, and the intermediate layer, it is possible to prevent moisture in the aqueous solution of the adhesive from entering the surface layer, and to reduce water absorption for a long time. That is, C / B can be made into the range of 1.0-2.0, when the Cobb water absorption in 120 seconds of contact time prescribed | regulated by JIS-P8140 is (C) g / m < 2 >.
Particularly preferably, the size effect of the surface layer is maximized, and the amount of the internal sizing agent is adjusted so that the size effect decreases in the order of the surface layer, the surface lower layer, and the middle layer. A liner can be obtained.
本発明において用いられる内添サイズ剤としては、従来よりライナーを製造するために用いられているものを特に制限なく用いることができ、例えば、ロジンサイズ、アルキルケテンダイマー（ＡＫＤ）、アルケニル無水コハク酸（ＡＳＡ）等が挙げられる。上記内添サイズ剤は、単独で用いてもよく、又は２種以上を混合して用いてもよい。
内添サイズ剤を添加する方法としては、特に制限はなく、段ボール用ライナーを抄紙によって製造する際に、通常の方法によって添加することができる。
As the internally added sizing agent used in the present invention, those conventionally used for producing a liner can be used without particular limitation. For example, rosin size, alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA) and the like. The internal sizing agent may be used alone or in combination of two or more.
The method for adding the internally added sizing agent is not particularly limited, and when the cardboard liner is produced by papermaking, it can be added by a usual method.
本発明の段ボール用ライナーは抄紙で形成することができる。本発明の段ボール用ライナーを製造する際に用いられる抄紙機としては、従来よりライナーを製造する際に用いられている抄紙機を使用することができる。このような抄紙機としては、例えば、円網抄紙機ウルトラフォーマー抄紙機、ベルボンドフォーマー抄紙機等が挙げられる。また、抄き合わせた原料を乾燥させる方法としては、例えば、ヤンキードライヤー、多筒ドライヤー、熱風ドライヤー、赤外線ドライヤー等が挙げられる。 The liner for cardboard of the present invention can be formed by papermaking. As a paper machine used when manufacturing the liner for corrugated board of this invention, the paper machine conventionally used when manufacturing a liner can be used. Examples of such a paper machine include a circular paper machine, an ultra former paper machine, and a bell bond former paper machine. Examples of the method for drying the combined raw materials include a Yankee dryer, a multi-cylinder dryer, a hot air dryer, and an infrared dryer.
以下に、実施例を示し、本発明をさらに具体的に説明するが、本発明はこれに限定されるものではない。なお、以下の実施例において、特に断りのない限り、次の意味を表す。％；質量％、薬品添加量；パルプ絶乾重量１トンあたりの固形分添加量（ｋｇ／ｔ）、フリーネス；カナダ標準ろ水度、坪量；ＪＩＳＰ８１２４に規定されるメートル坪量 Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited thereto. In the following examples, the following meanings are expressed unless otherwise specified. %; Mass%, chemical addition amount; solid content addition amount per kg of dry pulp weight (kg / t), freeness; Canadian standard freeness, basis weight; metric basis weight as defined in JISP8124
実施例１
下記の原材料を用いて、下記の製造方法に従って、段ボール用ライナーを得た。得られた段ボール用ライナー紙の詳細を表１、表２に示す。
＜原材料＞
・表層
パルプ；新段古紙と針葉樹未晒クラフトパルプ（フリーネス５５０ｃｃ）の混合パルプ（配合比４５：５５）
紙力増強剤；内添、両性タピオカ澱粉３ｋｇ／ｔ
サイズ剤；内添、ロジン系エマルジョン６ｋｇ／ｔ
定着剤；内添、硫酸アルミニウム（８％有姿）３０ｋｇ／ｔ
・表下層
パルプ；新段古紙と針葉樹未晒クラフトパルプ（フリーネス５５０ｃｃ）の混合パルプ（配合比７５：２５）
紙力増強剤；内添、両性タピオカ澱粉３ｋｇ／ｔ
サイズ剤；内添、ロジン系エマルジョン２ｋｇ／ｔ
定着剤；内添、硫酸アルミニウム（８％有姿）３０ｋｇ／ｔ
Example 1
Using the following raw materials, a corrugated board liner was obtained according to the following production method. The details of the obtained cardboard liner paper are shown in Tables 1 and 2.
<Raw materials>
・ Surface pulp: Mixed pulp of new-stage waste paper and softwood unbleached kraft pulp (freeness 550cc) (mixing ratio 45:55)
Paper strength enhancer; internal addition, amphoteric tapioca starch 3kg / t
Sizing agent; internal addition, rosin emulsion 6kg / t
Fixing agent; internal addition, aluminum sulfate (8% solid) 30kg / t
・ Lower surface pulp: Mixed pulp of new-stage waste paper and softwood unbleached kraft pulp (freeness 550cc) (mixing ratio 75:25)
Paper strength enhancer; internal addition, amphoteric tapioca starch 3kg / t
Sizing agent; internal addition, rosin emulsion 2kg / t
Fixing agent; internal addition, aluminum sulfate (8% solid) 30kg / t
・中層
パルプ；段ボール古紙と雑誌古紙の混合パルプ（配合比７０：３０）
紙力増強剤；内添、両性タピオカ澱粉１ｋｇ／ｔ
サイズ剤；内添、ロジン系エマルジョン２ｋｇ／ｔ
定着剤；内添、硫酸アルミニウム（８％有姿）４０ｋｇ／ｔ
・裏層
パルプ；段ボール古紙
紙力増強剤；内添、両性タピオカ澱粉１ｋｇ／ｔ
サイズ剤；添加なし
定着剤；内添、硫酸アルミニウム（８％有姿）４０ｋｇ／ｔ
・ Middle-layer pulp: Mixed pulp of corrugated cardboard and magazine wastepaper (mixing ratio 70:30)
Paper strength enhancer; internal addition, amphoteric tapioca starch 1kg / t
Sizing agent; internal addition, rosin emulsion 2kg / t
Fixing agent; internal addition, aluminum sulfate (8% solid) 40 kg / t
・ Back layer Pulp; Corrugated cardboard Paper strength enhancer; Internal additive, amphoteric tapioca starch 1kg / t
Sizing agent; no addition Fixing agent; internal addition, aluminum sulfate (8% solid) 40 kg / t
＜製造方法＞
抄紙速度；リールにて４００m/min、水分；リールにて８．５％
段ボール用ライナーの坪量を２８０ｇ／ｍ２とし、各層の坪量を表層４５ｇ／ｍ２、表下層５５ｇ／ｍ２、中層９０ｇ／ｍ２、裏層９０ｇ／ｍ２とした。
<Manufacturing method>
Paper making speed: 400 m / min on reel, moisture: 8.5% on reel
The basis weight of the corrugating liner to a 280 g / m 2, and the basis weight of each layer surface 45 g / m 2, Table lower 55 g / m 2, middle 90 g / m 2, a back layer 90 g / m 2.
上記パルプを用いて、４層抄きを行い、段ボール用ライナーを得た。得られた段ボール用ライナーについて、ＪＩＳ−Ｐ８１４０で規定される方法によって、接触時間１０秒におけるコッブ吸水度、及び接触時間１２０秒におけるコッブ吸水度を測定した。具体的には、段ボール用ライナーの裏面に円状のゴムパッキン等により１０ｃｍ２になるように区切り、そこにライナーの裏面が覆われる程度の水を載せ、１０秒（又は１２０秒）保持し、段ボール用ライナーの初期の重量と、１０秒（又は１２０秒）経過後の重量とを比較し、１ｍ２あたりの吸水度を計算し、吸水性を測定する。 Using the above pulp, four-layer papermaking was performed to obtain a cardboard liner. With respect to the obtained cardboard liner, the Cobb water absorbency at a contact time of 10 seconds and the Cobb water absorbency at a contact time of 120 seconds were measured by the method defined in JIS-P8140. Specifically, the back of the cardboard liner is separated by a circular rubber packing or the like so as to be 10 cm 2 , and water that covers the back of the liner is placed thereon and held for 10 seconds (or 120 seconds), The initial weight of the cardboard liner is compared with the weight after 10 seconds (or 120 seconds), the water absorption per 1 m 2 is calculated, and the water absorption is measured.
次に得られた段ボール用ライナーを使用して段ボールシートを作製した。段ボールシートは、中芯として強化芯（１８０ｇ／ｍ２）を用い、中芯の表及び裏に、上記ライナーを貼り合わせてＡ段シングルフルートを作製した。コルゲーターはダイオーエンジニアリング株式会社製、アグナティＧＯ−１４ＱＲＣ（設計貼合速度２５０ｍ/分）を使用した。貼合速度は１７０ｍ/ｍｉｎ、および２５０ｍ／ｍｉｎとして段ボールシートを得た。 Next, a cardboard sheet was produced using the obtained cardboard liner. For the corrugated cardboard sheet, a reinforced core (180 g / m 2 ) was used as a core, and the above liner was bonded to the front and back of the core to produce an A-stage single flute. The corrugator used was made by Daio Engineering Co., Ltd. and Agnati GO-14 QRC (design bonding speed of 250 m / min). The bonding speed was 170 m / min and 250 m / min to obtain a corrugated cardboard sheet.
また、得られた段ボールシートのライナーと中芯との接着力をＪＩＳ Ｚ ０４０２段ボール接着力試験方法により測定し、以下の基準に従い、評価した。なお、試験はシングルフェーサ及びダブルフェーサ側について、それぞれ１０個の試験片について行い、平均値を求めた。
◎：接着力が２７０Ｎ以上である。
○：接着力が２５０Ｎ以上２７０Ｎ未満である。
△：接着力が２３０Ｎ以上２５０Ｎ未満である。
×：接着力が２３０Ｎ未満である。
Moreover, the adhesive force between the liner and the core of the obtained corrugated cardboard sheet was measured by a JIS Z 0402 corrugated cardboard adhesive force test method and evaluated according to the following criteria. In addition, the test was done about each of 10 test pieces about the single facer and the double facer side, and the average value was obtained.
A: Adhesive strength is 270 N or more.
○: Adhesive strength is 250N or more and less than 270N.
(Triangle | delta): Adhesive force is 230N or more and less than 250N.
X: Adhesive strength is less than 230N.
また、得られた段ボールシートの外観を以下の基準に従い評価した。結果を表１に示す。
◎：平坦で、均一なシートが得られた。
○：シートの一部に糊の浸透が見られるが、使用上問題の無い程度であった。
△：シート全体に糊の浸透が見られる。
×：シート全体に糊の浸透が見られる。または波打ちが発生している。
Further, the appearance of the obtained corrugated cardboard sheet was evaluated according to the following criteria. The results are shown in Table 1.
A: A flat and uniform sheet was obtained.
○: Penetration of glue was observed in a part of the sheet, but it was not problematic in use.
Δ: Adhesion of glue is seen throughout the sheet.
×: Adhesion of glue is seen throughout the sheet. Or undulation has occurred.
比較例１
内添サイズ剤のパルプ絶乾燥質量あたりの添加量を、表１のとおりとし、坪量を３１０ｇ／ｍ２とし、各層の坪量を表層５０ｇ／ｍ２、表下層６０ｇ／ｍ２、中層１００ｇ／ｍ２、裏層１００ｇ／ｍ２とした以外は、実施例１と同様に操作を行い、段ボール用ライナーを得た。得られた段ボール用ライナーについて、実施例１と同様にして吸水度を測定した。また実施例１と同様にして段ボールを作製し、接着力及び外観を評価した。結果を表２に示す。
Comparative Example 1
The amount of internal sizing agent added per absolute dry mass of the pulp is as shown in Table 1, the basis weight is 310 g / m 2 , the basis weight of each layer is 50 g / m 2 for the surface layer, 60 g / m 2 for the lower layer, 100 g for the middle layer. / M 2 , except that the back layer was 100 g / m 2 , the same operation as in Example 1 was carried out to obtain a cardboard liner. The water absorption of the obtained cardboard liner was measured in the same manner as in Example 1. Corrugated cardboard was produced in the same manner as in Example 1, and the adhesive strength and appearance were evaluated. The results are shown in Table 2.
実施例２〜３、比較例２〜４
内添サイズ剤のパルプ絶乾燥質量あたりの添加量を、表１のとおりとした以外は、実施例１と同様に操作を行い、段ボール用ライナーを得た。得られた段ボール用ライナーについて、実施例１と同様にして吸水度を測定した。また、実施例１と同様にして段ボールを作製し、接着力及び外観を評価した。結果を表２に示す。
Examples 2-3 and Comparative Examples 2-4
A cardboard liner was obtained in the same manner as in Example 1 except that the addition amount of the internally added sizing agent per dry pulp mass was as shown in Table 1. The water absorption of the obtained cardboard liner was measured in the same manner as in Example 1. Corrugated cardboard was produced in the same manner as in Example 1, and the adhesive strength and appearance were evaluated. The results are shown in Table 2.
実施例４
内添サイズ剤のパルプ絶乾燥質量あたりの添加量を、表１のとおりとし、坪量を３００ｇ／ｍ２とし、各層の坪量を表層４５ｇ／ｍ２、表下層５５ｇ／ｍ２、中層１１０ｇ／ｍ２、裏層９０ｇ／ｍ２とした以外は、実施例１と同様に操作を行い、段ボール用ライナーを得た。得られた段ボール用ライナーについて、実施例１と同様にして吸水度を測定した。また実施例１と同様にして段ボールを作製し、接着力及び外観を評価した。結果を表２に示す。
Example 4
The amount of internal sizing agent added per absolute dry mass of pulp is as shown in Table 1, the basis weight is 300 g / m 2 , the basis weight of each layer is 45 g / m 2 for the surface layer, 55 g / m 2 for the lower layer, and 110 g for the middle layer. / M 2 , except that the back layer was 90 g / m 2 , the same operation as in Example 1 was performed to obtain a cardboard liner. The water absorption of the obtained cardboard liner was measured in the same manner as in Example 1. Corrugated cardboard was produced in the same manner as in Example 1, and the adhesive strength and appearance were evaluated. The results are shown in Table 2.
実施例５〜８、比較例５、６
内添サイズ剤のパルプ絶乾燥質量あたりの添加量を、表１のとおりとし、坪量を２１０ｇ／ｍ２、各層の坪量を表層４５ｇ／ｍ２、表下層５５ｇ／ｍ２、中層５５ｇ／ｍ２、裏層５５ｇ／ｍ２、抄紙速度を５３０ｍ／ｍｉｎとした以外は、実施例１と同様に操作を行い、段ボール用ライナーを得た。得られた段ボール用ライナーについて、実施例１と同様にして吸水度を測定した。また実施例１と同様にして段ボールを作製し、接着力及び外観を評価した。結果を表２に示す。
Examples 5 to 8, Comparative Examples 5 and 6
The amount of internal sizing agent added per absolute dry mass of the pulp is as shown in Table 1, the basis weight is 210 g / m 2 , the basis weight of each layer is 45 g / m 2 for the surface layer, 55 g / m 2 for the lower layer, 55 g / m for the middle layer. A cardboard liner was obtained in the same manner as in Example 1, except that m 2 , the back layer 55 g / m 2 , and the papermaking speed was 530 m / min. The water absorption of the obtained cardboard liner was measured in the same manner as in Example 1. Corrugated cardboard was produced in the same manner as in Example 1, and the adhesive strength and appearance were evaluated. The results are shown in Table 2.
実施例９
内添サイズ剤のパルプ絶乾燥質量あたりの添加量を、表１のとおりとし、坪量を１００ｇ／ｍ２とし、各層の坪量を表層４０ｇ／ｍ２、表下層３０ｇ／ｍ２、裏層３０ｇ／ｍ２の３層抄きとし、抄紙速度を７８０ｍ／ｍｉｎとした以外は、実施例１と同様に操作を行い段ボール用ライナーを得た。得られた段ボール用ライナーについて、実施例１と同様にして吸水度を測定した。また実施例１と同様にして段ボールを作製し、接着力及び外観を評価した。結果を表２に示す。
Example 9
The amount of internal sizing agent added per absolute dry mass of pulp is as shown in Table 1, the basis weight is 100 g / m 2 , the basis weight of each layer is 40 g / m 2 for the surface layer, 30 g / m 2 for the lower layer, and the back layer. A cardboard liner was obtained in the same manner as in Example 1 except that the three-layer paper making was performed at 30 g / m 2 and the paper making speed was 780 m / min. The water absorption of the obtained cardboard liner was measured in the same manner as in Example 1. Corrugated cardboard was produced in the same manner as in Example 1, and the adhesive strength and appearance were evaluated. The results are shown in Table 2.
実施例１０、１１、比較例７、８
内添サイズ剤のパルプ絶乾燥質量あたりの添加量を、表１のとおりとし、坪量を１２０ｇ／ｍ２、各層の坪量を表層４０ｇ／ｍ２、表下層４０ｇ／ｍ２、裏層４０ｇ／ｍ２の３層抄きとし、抄紙速度を７８０ｍ／ｍｉｎとした以外は、実施例１と同様に操作を行い、段ボール用ライナーを得た。得られた段ボール用ライナーについて、実施例１と同様にして吸水度を測定した。また実施例１と同様にして段ボールを作製し、接着力及び外観を評価した。結果を表２に示す。
Examples 10 and 11, Comparative Examples 7 and 8
The amount per pulp absolute dry weight of an internal sizing agent, and as shown in Table 1, basis weight of 120 g / m 2, the surface layer 40g / m 2 basis weight of each layer, the table lower 40g / m 2, the backing layer 40g / 3-ply city m 2, except that the papermaking speed is 780m / min, treating as in example 1 to obtain a corrugated cardboard liner. The water absorption of the obtained cardboard liner was measured in the same manner as in Example 1. Corrugated cardboard was produced in the same manner as in Example 1, and the adhesive strength and appearance were evaluated. The results are shown in Table 2.
比較例９
内添サイズ剤のパルプ絶乾燥質量あたりの添加量を、表１のとおりとし、坪量を９０ｇ／ｍ２とし、各層の坪量を表層３０ｇ／ｍ２、表下層３０ｇ／ｍ２、裏層３０ｇ／ｍ２の３層抄きとし、抄紙速度を７８０ｍ／ｍｉｎとした以外は、実施例１と同様に操作を行い、段ボール用ライナーを得た。得られた段ボール用ライナーについて、実施例１と同様にして吸水度を測定した。また実施例１と同様にして段ボールを作製し、接着力及び外観を評価した。結果を表２に示す。
Comparative Example 9
The amount per pulp absolute dry weight of an internal sizing agent, and as shown in Table 1, the basis weight and 90 g / m 2, the surface layer 30 g / m 2 basis weight of each layer, the table lower 30 g / m 2, the backing layer A cardboard liner was obtained in the same manner as in Example 1 except that the three-layer papermaking was performed at 30 g / m 2 and the papermaking speed was 780 m / min. The water absorption of the obtained cardboard liner was measured in the same manner as in Example 1. Corrugated cardboard was produced in the same manner as in Example 1, and the adhesive strength and appearance were evaluated. The results are shown in Table 2.
表１から明らかな通り、本発明の段ボール用ライナーは、段ボールシートを製造した際に、高い貼合速度においても、接着力を高くすることができ、すなわち、中芯と段ボール用ライナーとを貼り合わせる速度を向上させることのできるものであると共に、外観も良好なものである。 As is clear from Table 1, the corrugated liner of the present invention can increase the adhesive force even at a high pasting speed when a corrugated board sheet is produced, that is, the core and the corrugated liner are pasted. In addition to being able to improve the matching speed, the appearance is also good.
Claims (3)
坪量が１００〜３００ｇ／ｍ２であり、
上記坪量を（Ａ）ｇ／ｍ２とし、前記裏層面のＪＩＳ−Ｐ８１４０で規定される、接触時間１０秒におけるコッブ吸水度を（Ｂ）ｇ／ｍ２とした場合、Ｂ／Ａが０．７〜２．５であることを特徴とする段ボール用ライナー。 A cardboard liner having a multilayer structure of at least three layers of a surface layer, a middle layer and a back layer,
The basis weight is 100 to 300 g / m 2 ,
When the basis weight is (A) g / m 2 and the Cobb water absorption at a contact time of 10 seconds defined by JIS-P8140 of the back layer surface is (B) g / m 2 , B / A is 0. A liner for corrugated cardboard, characterized in that it is 7 to 2.5.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011161659A (en) * | 2010-02-05 | 2011-08-25 | Oji Paper Co Ltd | Reinforced corrugated cardboard using lightweight base paper and method for manufacturing the same |
| JP2013181262A (en) * | 2012-03-02 | 2013-09-12 | Daio Paper Corp | Liner base paper for corrugated board |
| JP2014012908A (en) * | 2012-07-04 | 2014-01-23 | Daio Paper Corp | Liner for corrugated paper |
| JP2015193972A (en) * | 2014-03-28 | 2015-11-05 | 特種東海製紙株式会社 | Inner core base paper for cardboard and cardboard |
| CN113071801A (en) * | 2021-03-25 | 2021-07-06 | 南通东鼎彩印包装厂 | Add gram weight welt structure convenient to equipment |
| JP2021165444A (en) * | 2020-04-06 | 2021-10-14 | 王子ホールディングス株式会社 | Paperboard |
| US20220136175A1 (en) * | 2019-02-20 | 2022-05-05 | Borregaard As | Production of corrugated paperboards and cardboards comprising chemically treated paper |
| JP7323113B1 (en) * | 2022-12-23 | 2023-08-08 | 日本製紙株式会社 | Paperboard |
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2003
- 2003-10-31 JP JP2003372419A patent/JP4236560B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011161659A (en) * | 2010-02-05 | 2011-08-25 | Oji Paper Co Ltd | Reinforced corrugated cardboard using lightweight base paper and method for manufacturing the same |
| JP2013181262A (en) * | 2012-03-02 | 2013-09-12 | Daio Paper Corp | Liner base paper for corrugated board |
| JP2014012908A (en) * | 2012-07-04 | 2014-01-23 | Daio Paper Corp | Liner for corrugated paper |
| JP2015193972A (en) * | 2014-03-28 | 2015-11-05 | 特種東海製紙株式会社 | Inner core base paper for cardboard and cardboard |
| US20220136175A1 (en) * | 2019-02-20 | 2022-05-05 | Borregaard As | Production of corrugated paperboards and cardboards comprising chemically treated paper |
| JP2021165444A (en) * | 2020-04-06 | 2021-10-14 | 王子ホールディングス株式会社 | Paperboard |
| JP7456247B2 (en) | 2020-04-06 | 2024-03-27 | 王子ホールディングス株式会社 | paperboard |
| CN113071801A (en) * | 2021-03-25 | 2021-07-06 | 南通东鼎彩印包装厂 | Add gram weight welt structure convenient to equipment |
| JP7323113B1 (en) * | 2022-12-23 | 2023-08-08 | 日本製紙株式会社 | Paperboard |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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