JP2011252248A - Packaging paper for heavy-duty bag - Google Patents
Packaging paper for heavy-duty bag Download PDFInfo
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- JP2011252248A JP2011252248A JP2010125931A JP2010125931A JP2011252248A JP 2011252248 A JP2011252248 A JP 2011252248A JP 2010125931 A JP2010125931 A JP 2010125931A JP 2010125931 A JP2010125931 A JP 2010125931A JP 2011252248 A JP2011252248 A JP 2011252248A
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 51
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000008119 colloidal silica Substances 0.000 claims abstract description 39
- 239000002245 particle Substances 0.000 claims abstract description 33
- 230000003068 static effect Effects 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000012978 lignocellulosic material Substances 0.000 claims abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 32
- 239000000843 powder Substances 0.000 abstract description 11
- 239000003795 chemical substances by application Substances 0.000 abstract description 7
- 229910000329 aluminium sulfate Inorganic materials 0.000 abstract 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 abstract 1
- 235000011128 aluminium sulphate Nutrition 0.000 abstract 1
- 230000029087 digestion Effects 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 100
- 238000010411 cooking Methods 0.000 description 36
- 238000000034 method Methods 0.000 description 28
- 239000000126 substance Substances 0.000 description 21
- -1 polyethylene Polymers 0.000 description 19
- 239000007787 solid Substances 0.000 description 19
- 229930182558 Sterol Natural products 0.000 description 17
- 235000003702 sterols Nutrition 0.000 description 17
- 150000003432 sterols Chemical class 0.000 description 16
- 239000003513 alkali Substances 0.000 description 14
- 239000002585 base Substances 0.000 description 14
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 13
- 239000002655 kraft paper Substances 0.000 description 11
- 239000013055 pulp slurry Substances 0.000 description 11
- 239000012748 slip agent Substances 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 238000010009 beating Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 238000007639 printing Methods 0.000 description 10
- 229920006319 cationized starch Polymers 0.000 description 9
- 239000002023 wood Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 5
- 239000000976 ink Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 238000004537 pulping Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 235000014466 Douglas bleu Nutrition 0.000 description 3
- 241000218683 Pseudotsuga Species 0.000 description 3
- 235000005386 Pseudotsuga menziesii var menziesii Nutrition 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 2
- 150000004056 anthraquinones Chemical class 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010893 paper waste Substances 0.000 description 2
- 229960003330 pentetic acid Drugs 0.000 description 2
- 239000005077 polysulfide Substances 0.000 description 2
- 229920001021 polysulfide Polymers 0.000 description 2
- 150000008117 polysulfides Polymers 0.000 description 2
- 239000011164 primary particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- PCFMUWBCZZUMRX-UHFFFAOYSA-N 9,10-Dihydroxyanthracene Chemical compound C1=CC=C2C(O)=C(C=CC=C3)C3=C(O)C2=C1 PCFMUWBCZZUMRX-UHFFFAOYSA-N 0.000 description 1
- YYVYAPXYZVYDHN-UHFFFAOYSA-N 9,10-phenanthroquinone Chemical compound C1=CC=C2C(=O)C(=O)C3=CC=CC=C3C2=C1 YYVYAPXYZVYDHN-UHFFFAOYSA-N 0.000 description 1
- 238000005698 Diels-Alder reaction Methods 0.000 description 1
- 229930192627 Naphthoquinone Natural products 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- RJGDLRCDCYRQOQ-UHFFFAOYSA-N anthrone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3CC2=C1 RJGDLRCDCYRQOQ-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 125000000687 hydroquinonyl group Chemical class C1(O)=C(C=C(O)C=C1)* 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Landscapes
- Bag Frames (AREA)
- Paper (AREA)
Abstract
Description
本発明は、製袋工場等で重袋に加工されて使用される重袋用包装用紙に関し、さらに詳しく述べるならば、印刷及び製袋加工後に内容物を充填された袋を積載する際、あるいは搬送する際に発生する所謂、重袋滑りトラブルを生じ難い重袋用包装用紙に関するものである。 The present invention relates to heavy duty packaging paper that is processed into a heavy bag at a bag making factory or the like, and more specifically, when loading a bag filled with contents after printing and bag making processing, or The present invention relates to a so-called heavy bag wrapping paper that is unlikely to cause a so-called heavy bag slip problem that occurs during transportation.
製粉業、製糖業、化学品製造業などの粉体製品を製造する産業においては、重袋用包装用紙から製造された重袋内に粉体製品を充填し、これを何層にも積み重ねて貯蔵したり、あるいはパレットの上に積み重ねて積載して、フォークリフトで搬送し、トラックに積み込んで出荷している。このように粉体製品を充填した重袋を積み重ねた場合に、袋の表面が滑り易いと、積み重ねた袋が滑り落ち、搬送作業の大幅な能率低下となる。また、落下の衝撃により、破袋が起これば、重袋に充填された粉体製品が飛散し回収できずに大きな損失となる。該重袋の滑り落下はフォークリフトあるいはトラックが、カーブまたは急停止する時に起こりやすく、落下場所に人がいれば人身事故となる場合も考えられる。こうした重袋の滑り問題は生産性の低下だけでなく、重袋のユーザーのみならず製袋メーカーや製紙メーカーにとっても大きな事故につながる非常に大きな問題である。したがって、製袋作業性及び製袋後の品質を維持し、かつ滑らない重袋用に加工されて使用される重袋用包装用紙の開発が強く要望されている。 In industries that manufacture powder products such as the milling industry, sugar manufacturing industry, and chemicals manufacturing industry, powder products are filled into heavy bags made from wrapping paper for heavy bags and stacked in layers. They are stored or stacked and loaded on pallets, transported with a forklift, and loaded onto a truck for shipment. In this way, when the heavy bags filled with powder products are stacked, if the bag surface is slippery, the stacked bags slide down, resulting in a significant reduction in efficiency of the transport operation. In addition, if a bag breakage occurs due to the impact of the drop, the powder product filled in the heavy bag is scattered and cannot be collected, resulting in a large loss. The heavy drop of the heavy bag is likely to occur when the forklift or the truck curves or suddenly stops, and if there is a person at the place of the fall, a personal accident may occur. Such a heavy bag slipping problem is not only a decrease in productivity, but also a very big problem not only for heavy bag users but also for bag makers and paper makers. Accordingly, there is a strong demand for the development of wrapping paper for heavy bags that is processed and used for heavy bags that maintain bag-making workability and quality after bag-making and do not slip.
しかしながら、重袋用原紙として使用される重袋用包装用紙は、印刷、製袋、搬送工程で物理的な表面摩擦や化学的成分付着により滑りやすくなる機会が非常に多い。例えば、重袋用包装用紙の巻取から重袋を製造する製袋工場においては、原紙はその表面に商品名等を印刷された後、製袋機に送られて折込、糊付け、切断、底紙貼付け、ミシン掛け等の加工工程を経て重袋とされるが、印刷や加工工程では巻取りから繰り出された原紙の走行方向を変えるために多くのロールが配置され、その結果、原紙の表面が摩擦されて滑りやすくなる。また、通常の印刷インキには乾燥後の印刷面を滑らかにして印刷面を保護する目的でポリエチレン等が配合されているため、さらに油性インキの場合はビヒクルが紙に浸透するため、原紙表面は滑りやすい状態となる。重袋の搬送工程においても、ローラーコンベア等の搬出コンベアやパレタイザーの普及により搬送作業が自動化された結果、連続的な重袋の流れとなり、袋の表面が擦られる機会が増大している。 However, the packaging paper for heavy bags used as the base paper for heavy bags is very likely to be slippery due to physical surface friction and chemical component adhesion in printing, bag making and transport processes. For example, in a bag making factory that manufactures heavy bags from the winding of heavy duty packaging paper, the base paper is printed with the product name on the surface and then sent to the bag making machine for folding, gluing, cutting, bottom It is made into a heavy bag through processing processes such as paper pasting and sewing, but in printing and processing processes, many rolls are arranged to change the running direction of the base paper unwound from the winding, and as a result, the surface of the base paper Will rub and become slippery. In addition, normal printing inks are blended with polyethylene for the purpose of smoothing the printed surface after drying and protecting the printed surface, and in the case of oil-based inks, the vehicle penetrates the paper, so the surface of the base paper is It becomes slippery. Also in the heavy bag conveyance process, as a result of the conveyance work being automated by the spread of a carry-out conveyor such as a roller conveyer and a palletizer, a continuous heavy bag flow is generated, and the chance of rubbing the surface of the bag is increasing.
重袋用に使用される原紙(重袋用包装用紙)の表面を滑りにくくするために、従来から製紙業界では原紙製造段階の乾燥工程中にサイズプレスや噴霧ノズルなどを用い原紙表面に防滑剤を塗布あるいは噴霧する方法が種々試みられている。防滑剤としては、コロイダルシリカ系無機物(特許文献1)やスチレン−アクリル系共重合体の糊(特許文献2)等が主に使用されている。また、特定の粒子径分布を有する水和珪酸塩を填料として含有する未晒クラフト紙が提案されている(特許文献3)。さらに、製袋業界においても、主に多色印刷機でインキ1色分を防滑剤塗布用に使用している例が多い。また、製袋後の袋表面に防滑剤を塗布することも行われている。 In order to make the surface of base paper used for heavy bags (wrapping paper for heavy bags) difficult to slip, the paper industry has traditionally used a size press, spray nozzles, etc. during the drying process of the base paper to provide a slip-proof agent on the base paper surface. Various attempts have been made to apply or spray the liquid. Colloidal silica-based inorganic substances (Patent Document 1), styrene-acrylic copolymer glue (Patent Document 2), and the like are mainly used as anti-slip agents. Further, unbleached kraft paper containing a hydrated silicate having a specific particle size distribution as a filler has been proposed (Patent Document 3). Further, in the bag making industry, there are many examples in which one color of ink is used for applying an anti-slip agent mainly in a multi-color printing machine. In addition, an anti-slip agent is applied to the bag surface after bag making.
しかしながら、原紙製造段階の乾燥工程で原紙表面に防滑剤を塗布または噴霧する方法は、ドライヤー部での汚れが著しく、製紙用カンバスやドライヤーシリンダーに付着蓄積して熱により変質した汚れが原紙に転移すると、原紙の商品価値がなくなってしまうという欠点がある。また、抄紙機によっては多くの品種の紙を抄造するため、重袋原紙抄造時に発生した防滑剤汚れが、テープ用原紙や食品用途の紙のように品質が厳しい品種に混入すると、製紙メーカーとしては信用失墜となる。粒径の大きなものは脱落する可能性があり、内容物に影響を与える恐れがある。さらに、原紙の片面に防滑剤を塗布した製品においては、製袋メーカーで防滑剤塗布面を袋の内側にして製造するとまったく無意味となってしまうという問題もある。 However, the method of applying or spraying an anti-slip agent on the surface of the base paper during the drying process at the base paper manufacturing stage shows significant dirt on the dryer section, and the dirt that adheres and accumulates on the paper making canvas or dryer cylinder and changes in quality is transferred to the base paper. Then, there is a drawback that the commercial value of the base paper is lost. In addition, because many types of paper are made depending on the paper machine, if the anti-slip agent stains that occur during the making of heavy bag base paper are mixed into high-quality varieties such as tape base paper and food-use paper, as a paper manufacturer Will lose credit. Larger particles may drop out and affect the contents. Furthermore, in a product in which an anti-slip agent is applied to one side of a base paper, there is a problem that it is completely meaningless if a bag manufacturer makes the anti-slip agent applied surface inside the bag.
また、原紙に印刷するに際して印刷機で防滑剤を塗布する方法は、インキ転写前後の極めて短い時間に防滑剤の塗布が行われるため、最も滑りやすい印刷面への塗布ができず、絵柄印刷部の外側や袋の裏側にしか塗布する事ができない。さらに、製袋後の袋表面に防滑剤を塗布する方法は、袋1枚毎の作業となるため効率が悪い。 In addition, when printing on the base paper, the anti-slip agent is applied on the printing machine in a very short time before and after the ink transfer, so the anti-slipping agent cannot be applied to the most slippery printing surface. Can only be applied to the outside of the bag or the back of the bag. Furthermore, the method of applying an anti-slip agent to the bag surface after bag making is inefficient because it is an operation for each bag.
本発明の目的は、重袋用原紙の抄紙段階、あるいは製袋段階において、重袋用包装用紙の表面に防滑剤を塗布しなくても、粉体製品を充填した後に積み重ねても滑りにくい重袋を製造することができる包装用紙を提供することにある。 The object of the present invention is to prevent heavy slipping even if the anti-slip agent is not applied to the surface of the heavy-duty wrapping paper at the paper-making stage or the bag-making stage of the heavy-duty sachet, or even after being stacked after being filled with powder products. It is to provide a wrapping paper capable of manufacturing a bag.
本発明は、以下の各発明を包含する。
(1)パルプ原料がリグノセルロース物質を蒸解した後のカッパー価が20〜80である未晒パルプを主成分とし、該パルプ原料100質量部に対して、硫酸バンドを0.1〜2.0質量部添加して抄紙し、コロイダルシリカを用紙中に0.05〜2.0質量%含有せしめた重袋用包装用紙。
The present invention includes the following inventions.
(1) The pulp raw material is mainly composed of unbleached pulp having a kappa number of 20 to 80 after the lignocellulosic material is digested, and the sulfuric acid band is 0.1 to 2.0 with respect to 100 parts by mass of the pulp raw material. Wrapping paper for heavy bags in which paper is made by adding parts by mass and colloidal silica is contained in the paper in an amount of 0.05 to 2.0% by mass.
(2)前記コロイダルシリカの含有量が0.2〜1.0質量%である(1)に記載の重袋用包装用紙。 (2) The heavy duty packaging paper according to (1), wherein the content of the colloidal silica is 0.2 to 1.0% by mass.
(3)前記コロイダルシリカの平均粒子径が100nm以下である(1)または(2)に記載の重袋用包装用紙。 (3) The packaging paper for heavy bags according to (1) or (2), wherein the colloidal silica has an average particle size of 100 nm or less.
(4)静摩擦係数が0.55〜0.70の範囲にある(1)〜(3)のいずれか1項に記載の重袋用包装用紙。 (4) The packaging paper for heavy bags according to any one of (1) to (3), wherein the coefficient of static friction is in the range of 0.55 to 0.70.
本発明者らは、上述した従来技術の問題を化学的観点から鋭意研究した結果、コロイダルシリカおよび硫酸バンドの特定量を未晒パルプに内添して抄紙した包装用紙から製造した重袋は、これに粉体製品を充填して積み重ねたときに滑りにくくなることを見出し、本発明を完成するに至ったものである。 As a result of diligent research from the chemical point of view of the above-mentioned problems of the prior art, the present inventors have produced a heavy bag made from a wrapping paper made by adding a specific amount of colloidal silica and a sulfuric acid band to unbleached pulp, It has been found that the powder product is less slippery when filled with powder products, and the present invention has been completed.
本発明の重袋用包装用紙には、引張強さ、破裂強度、引裂強度の点から、リグノセルロース物資と蒸解しただけで、漂白を行なわない未晒しパルプを主に原料として用いる。
パルプ原料となるリグノセルロース物質は広葉樹材、針葉樹材のいずれの材でもよく、また非木材でもよく、特に限定されるものではないが、針葉樹材は上記強度の点から特に好ましく、未晒し針葉樹パルプは原料パルプ中に80質量%以上含有させる事が好ましい。
その他のパルプ原料としては各種のパルプが利用可であがるが、古紙パルプは古紙原料に、強度の高い茶模造紙から製造される古紙パルプが好ましい。
In the heavy bag packaging paper of the present invention, unbleached pulp that is not bleached but is simply used as a raw material simply by digesting with lignocellulosic materials from the viewpoint of tensile strength, burst strength, and tear strength.
The lignocellulosic material used as the pulp raw material may be either hardwood or softwood, and may be non-wood, and is not particularly limited. Is preferably contained in the raw material pulp at 80% by mass or more.
Various pulps can be used as other pulp raw materials, and waste paper pulp is preferably used as raw paper raw material and waste paper pulp produced from high-strength tea imitation paper.
本発明において、蒸解工程におけるパルプ化法としては、特に限定されるものではないが、好適にはクラフト蒸解、ポリサルファイド蒸解、ソーダ蒸解、アルカリサルファイト蒸解等の公知の化学パルプ化法が用いられる。特に、パルプ品質(強度等)、未晒パルプ収率、蒸解廃液から熱量や蒸解薬品としてアルカリ分を回収できる方法として確立されていること等、また広範な原料木材などのリグノセルロース物質に適用でき、連続蒸解による迅速化を可能にするなどの利点を考慮すると、クラフト蒸解法が好適に用いられる。例えば、木材をクラフト蒸解する場合、クラフト蒸解白液の硫化度は5〜75%、好ましくは20〜35%、有効アルカリ添加率は、木材絶乾質量に対して5〜30質量%、好ましくは10〜25質量%である。 In the present invention, the pulping method in the cooking step is not particularly limited, but a known chemical pulping method such as kraft cooking, polysulfide cooking, soda cooking, alkali sulfite cooking, etc. is preferably used. In particular, it has been established as a method for recovering alkalinity from pulp quality (strength, etc.), unbleached pulp yield, cooking waste liquor as heat and cooking chemicals, and is applicable to a wide range of raw materials such as wood. Considering advantages such as enabling rapid speed by continuous cooking, the kraft cooking method is preferably used. For example, in the case of kraft cooking of wood, the degree of sulfidization of kraft cooking white liquor is 5 to 75%, preferably 20 to 35%, and the effective alkali addition rate is 5 to 30% by weight, preferably 5% to 30% by weight based on the absolute dry weight of wood. 10 to 25% by mass.
蒸解温度は140〜170℃、滞留時間50〜300分、液比2.5〜10が好ましい。蒸解温度が140℃未満ではパルプ化が進行せず、170℃を超えるとパルプ収率が極端に低下するため好ましくない。
滞留時間が50分未満ではパルプ化が進行せず、300分を超えるとパルプ生産効率が悪化するために好ましくない。
液比2.5未満では木材チップが蒸解白液に漬かりきれずに未蒸解カスが増加し、液比10を超えると生産効率が低下するため好ましくない。
The cooking temperature is preferably 140 to 170 ° C., a residence time of 50 to 300 minutes, and a liquid ratio of 2.5 to 10. If the cooking temperature is less than 140 ° C., pulping does not proceed, and if it exceeds 170 ° C., the pulp yield is extremely lowered, which is not preferable.
When the residence time is less than 50 minutes, pulping does not proceed, and when it exceeds 300 minutes, the pulp production efficiency deteriorates, which is not preferable.
If the liquid ratio is less than 2.5, the wood chips cannot be completely soaked in the cooked white liquor and the undistilled residue increases.
蒸解方式は、連続蒸解法あるいはバッチ蒸解法のどちらでもよく、連続蒸解釜を用いる場合は、蒸解白液を分割で添加する蒸解法でもよく、その方式は特に問わない。バッチ蒸解法による蒸解ブロー時には、蒸解圧力でブローを行う蒸気ブロー方式と蒸解黒液の供給圧力でブローを行うコールドブロー方式がある。 The cooking method may be either a continuous cooking method or a batch cooking method, and when a continuous cooking kettle is used, a cooking method in which the cooking white liquor is added in portions may be used, and the method is not particularly limited. There are two types of steam blow methods: a steam blow method for blowing at the cooking pressure and a cold blow method for blowing at the supply pressure of the cooking black liquor.
本発明において、蒸解補助剤として公知のポリサルファイドや環状ケト化合物、例えばベンゾキノン、ナフトキノン、アントラキノン、アントロン、フェナントロキノン及び前記キノン系化合物のアルキル、アミノ等の核置換体、あるいは前記キノン系化合物の還元型であるアントラヒドロキノンのようなヒドロキノン系化合物、さらにはディールスアルダー法によるアントラキノン合成法の中間体として得られる安定な化合物である9,10−ジケトヒドロアントラセン化合物等から選ばれた1種あるいは2種以上が添加されてもよく、その添加率は通常の添加率であり、例えば、木材チップの絶乾質量に対して0.001〜1.5質量%である。また、その他の使用できる蒸解助剤としては、エチレンジアミンテトラ酢酸(EDTA)、ジエチレントリアミンペンタ酢酸(DTPA)等のキレート剤等が挙げられ、特に限定されるものではない。これらの蒸解助剤は、蒸解液と同様に分割添加することが可能であり、添加場所も限定されるものではない。 In the present invention, known polysulfides and cyclic keto compounds as cooking aids, for example, benzoquinone, naphthoquinone, anthraquinone, anthrone, phenanthroquinone and quinone-based compounds such as alkyl, amino and other nuclear substitutes, or reduction of the quinone-based compounds 1 or 2 selected from hydroquinone compounds such as anthrahydroquinone which is a type, and 9,10-diketohydroanthracene compound which is a stable compound obtained as an intermediate of an anthraquinone synthesis method by Diels Alder method A seed or more may be added, and the addition rate is a normal addition rate, for example, 0.001 to 1.5% by mass with respect to the absolutely dry mass of the wood chip. Other usable cooking aids include chelating agents such as ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA), and are not particularly limited. These cooking aids can be divided and added in the same manner as the cooking liquor, and the place of addition is not limited.
本発明において、蒸解パルプは洗浄、粗選及び精選工程を経て、必要に応じて公知のアルカリ酸素法により脱リグニンすることもできる。本発明において使用可能なアルカリ酸素法は公知の中濃度法あるいは高濃度法がそのまま適用できるが、現在、汎用的に用いられているパルプ濃度が8〜15質量%で行われる中濃度法が好ましい。アルカリ酸素法におけるアルカリとしては、苛性ソーダあるいは酸化されたクラフト蒸解白液を使用することができ、酸素ガスとしては深冷分離法からの酸素、PSA(Pressure Swing Adsorption)からの酸素、VSA(Vacuum Swing Adsorption)からの酸素等が使用できる。 In the present invention, the digested pulp can be delignified by a known alkaline oxygen method, if necessary, through washing, rough selection and selection processes. As the alkaline oxygen method that can be used in the present invention, a known medium concentration method or high concentration method can be applied as it is, but a medium concentration method that is currently used at a pulp concentration of 8 to 15% by mass is preferred. . As the alkali in the alkali oxygen method, caustic soda or oxidized kraft cooking white liquor can be used. As the oxygen gas, oxygen from a cryogenic separation method, oxygen from PSA (Pressure Swing Adsorption), VSA (Vacuum Swing) Oxygen etc. from Adsorption) can be used.
前記酸素ガスとアルカリは中濃度ミキサーにおいて中濃度のパルプスラリーに添加され、混合が十分に行われた後、加圧下でパルプ、酸素及びアルカリの混合物を一定時間保持できる反応塔へ送られ、脱リグニンされる。
酸素ガスの添加率はパルプ絶乾質量に対して0.5〜3質量%、アルカリ添加率は0.5〜4質量%、反応温度は80〜120℃、反応時間は15〜100分、パルプ濃度は8〜15質量%であり、その他の条件は公知のものが適用できる。本発明においてはアルカリ酸素処理による脱リグニン工程において、上記アルカリ酸素処理を連続して複数回行ってもよい。
The oxygen gas and alkali are added to a medium-concentration pulp slurry in a medium-concentration mixer. After sufficient mixing, the oxygen gas and alkali are sent to a reaction tower capable of holding a mixture of pulp, oxygen, and alkali for a certain period of time under pressure. Ligned.
The oxygen gas addition rate is 0.5 to 3% by mass with respect to the absolute dry mass of the pulp, the alkali addition rate is 0.5 to 4% by mass, the reaction temperature is 80 to 120 ° C., the reaction time is 15 to 100 minutes, and the pulp A density | concentration is 8-15 mass%, and other conditions can apply a well-known thing. In the present invention, in the delignification step by the alkali oxygen treatment, the alkali oxygen treatment may be continuously performed a plurality of times.
アルカリ酸素処理が施されたパルプは次いで洗浄工程に送られ、洗浄処理される。この段階において、滑りに影響を及ぼす未晒パルプ中のステロールのエステル化合物の含有量が0.1質量%未満であることが好ましい。 The pulp that has been subjected to the alkaline oxygen treatment is then sent to a washing step for washing treatment. In this stage, the content of the ester compound of sterol in the unbleached pulp that affects slipping is preferably less than 0.1% by mass.
上記のように本発明においては薬液濃度、アルカリ相当量、蒸解釜中の温度、圧力、時間を適宜調節してカッパー価(Kα)を20〜80となるように制御する。カッパー価が80を超えると未蒸解物が増え、チリが多くなるため、好ましくない。逆にカッパー価が20未満であると得られた包装用紙の引裂き強度が低下し過ぎ、好ましくない。 As described above, in the present invention, the kappa number (Kα) is controlled to 20-80 by appropriately adjusting the chemical concentration, alkali equivalent, temperature, pressure, and time in the digester. A kappa number exceeding 80 is not preferable because undistilled material increases and the amount of dust increases. Conversely, if the kappa number is less than 20, the tear strength of the resulting wrapping paper is too low, which is not preferable.
上記、カッパー価(Kα)が20〜80に調製した未晒しパルプを含有する原料パルプは、レファイナーでフリーネスを400〜600mlCSF(カナダ標準フリーネス)に調製する。
400ml未満では透気度が高くなり、破袋が発生する恐れがある。また、600mlを超えると引張強度が低下する恐れがあるので好ましくない。
The above-described raw pulp containing unbleached pulp having a kappa number (Kα) of 20 to 80 is prepared with a refiner to a freeness of 400 to 600 ml CSF (Canadian Standard Freeness).
If it is less than 400 ml, the air permeability becomes high, and there is a possibility that broken bags may occur. On the other hand, if it exceeds 600 ml, the tensile strength may decrease, which is not preferable.
本発明では、重袋の滑りを防止するために、重袋用包装用紙中にコロイダルシリカを0.05〜2.0質量%、好ましくは0.2〜1.0質量%含有させる。コロイダルシリカを効率的に用紙中に含有させるために、原料パルプ100質量部に対して、硫酸バンドを0.1〜2.0質量部の範囲で添加する。コロイダルシリカの含有量が0.05質量%未満であると、粉体製品を充填した後に積み重ねると粉体製品が滑り易くなる。含有量が2.0質量%を超えると地合が悪化するほか高コストとなる。硫酸バンドの添加量が0.1質量部未満であるとコロイダルシリカのパルプ繊維への定着が悪くなり、滑りが発生するほかチリ等の欠点も増加する。添加量が2.0質量部を超えると抄紙機系内のpHが低くなり過ぎ、抄紙機を錆びさせてしまう等の問題を発生する。 In the present invention, in order to prevent heavy bags from slipping, 0.05 to 2.0 mass%, preferably 0.2 to 1.0 mass%, of colloidal silica is contained in the heavy duty packaging paper. In order to efficiently contain colloidal silica in the paper, a sulfuric acid band is added in the range of 0.1 to 2.0 parts by mass with respect to 100 parts by mass of the raw material pulp. When the colloidal silica content is less than 0.05% by mass, the powder product becomes slippery when stacked after being filled with the powder product. If the content exceeds 2.0% by mass, the formation becomes worse and the cost becomes high. When the added amount of the sulfuric acid band is less than 0.1 parts by mass, the fixing of the colloidal silica to the pulp fiber is deteriorated, slippage occurs, and defects such as dust increase. When the added amount exceeds 2.0 parts by mass, the pH in the paper machine system becomes too low, causing problems such as rusting the paper machine.
本発明において用いられるコロイダルシリカは、SiO2・xH2Oで表せられ、粒子形状は球状または球状に近い一次粒子が連結せずに独立して存在している一般的なコロイダルシリカ以外にも、粒子が連結した鎖状粒子、三次元網目構造を有するもの、非球状コロイダルシリカを使用することも出来る。 The colloidal silica used in the present invention is represented by SiO 2 xH 2 O, and the particle shape is not limited to the general colloidal silica in which spherical or nearly spherical primary particles exist independently without being connected, Chain particles in which the particles are connected, those having a three-dimensional network structure, and non-spherical colloidal silica can also be used.
本発明において用いられるコロイダルシリカは粒子径100nm以下のものを用い、好ましくは50nm以下、より好ましくは20nm以下である。コロイダルシリカの粒子径は1μm以下で製造されるが、100nmを超えると粒子の比表面積が小さくなり滑り抑制効果が不十分となるだけでなく、脱落する可能性もでてくるため好ましくない。なおコロイダルシリカの粒子径は一次粒子の大きさである。 The colloidal silica used in the present invention has a particle diameter of 100 nm or less, preferably 50 nm or less, more preferably 20 nm or less. The particle diameter of colloidal silica is 1 μm or less. However, if the particle diameter exceeds 100 nm, the specific surface area of the particles becomes small and the slip prevention effect becomes insufficient, and the possibility of falling off is not preferable. The particle diameter of colloidal silica is the size of the primary particles.
上記のように調製した紙料は抄紙機により抄紙され、本発明の重袋用包装用紙が得られる。その際使用される抄紙機としては、例えば、長網式、円網式、短網式、ツインワイヤー式抄紙機などが挙げられる。紙料中には、必要に応じて、各種のアニオン性、ノニオン性、カチオン性あるいは両性の歩留向上剤、濾水性向上剤、紙力増強剤や内添サイズ剤等の各種抄紙用内添助剤、染料、蛍光増白剤、pH調整剤、消泡剤、ピッチコントロール剤、スライムコントロール剤等の抄紙用内添助剤を適宜添加することができる。 The paper stock prepared as described above is made by a paper machine to obtain the heavy duty packaging paper of the present invention. Examples of the paper machine used at that time include a long net type, a circular net type, a short net type, and a twin wire type paper machine. In the paper stock, various anionic, nonionic, cationic or amphoteric retention improvers, freeness improvers, paper strength enhancers, internal sizing agents, and other various internal additives for papermaking, as required. An auxiliary additive for papermaking such as an auxiliary agent, a dye, a fluorescent brightening agent, a pH adjuster, an antifoaming agent, a pitch control agent, and a slime control agent can be appropriately added.
かくして得られた重袋用包装用紙は、前記未晒パルプ100質量部に対して、硫酸バンドを0.1〜2.0質量部添加して抄紙することによって、用紙中にコロイダルシリカを0.05〜2.0質量%含有させ、JIS P 8147−1994による滑り傾斜角を26度以上に保持することが可能となる。 The thus obtained heavy-bag packaging paper is made by adding 0.1 to 2.0 parts by mass of a sulfuric acid band to 100 parts by mass of the unbleached pulp, whereby colloidal silica is added in an amount of 0. The slip inclination angle according to JIS P 8147-1994 can be maintained at 26 degrees or more.
印刷及び製袋加工後の滑り傾斜角については、印刷面積、インキの種類、加工機の種類、加工機保守状態など様々な影響を受けるが、滑り傾斜角が20度以下となると滑りトラブルが発生することが経験的に判明しており、滑り傾斜角を26度以上に保つことができれば滑りトラブルは発生しない。 Sliding angle after printing and bag making is affected by various factors such as printing area, ink type, type of processing machine, processing machine maintenance condition, etc., but slipping trouble occurs when the sliding angle becomes 20 degrees or less. It has been empirically found that slipping trouble does not occur if the sliding inclination angle can be maintained at 26 degrees or more.
また、本発明において重袋用包装用紙の静摩擦係数は0.55〜0.70の範囲にあることが好ましい。静摩擦係数が0.55未満では、滑り傾斜角が26度以下になり、滑りトラブルの発生が多くなる。静摩擦係数が0.70を超える場合、製袋加工時の紙送りがスムーズに行われ難くなり、加工適性が低下する。 In the present invention, the static friction coefficient of the heavy duty packaging paper is preferably in the range of 0.55 to 0.70. When the static friction coefficient is less than 0.55, the slip inclination angle becomes 26 degrees or less, and the occurrence of slip trouble increases. When the static friction coefficient exceeds 0.70, it is difficult to smoothly feed the paper during the bag making process, and the workability is deteriorated.
本発明の重袋用包装用紙の滑り傾斜角、静摩擦係数が向上するメカニズムについては、界面化学的な考察が必要となるが、重袋用包装用紙は、パルプ繊維中に脂肪酸やステロール化合物などの樹脂分を多く含有しており、そのなかの摩擦係数を低下させる成分が経時にて表面にブリードして滑りを発生させると考えられる本発明では、コロイダルシリカと硫酸バンドを共存させることによりパルプ繊維に効率的に定着させることで、表面へのブリードを抑えていると考えられる。 The mechanism of improving the sliding inclination angle and the static friction coefficient of the heavy duty packaging paper of the present invention requires consideration of interfacial chemistry, but the heavy duty packaging paper contains fatty acids, sterol compounds, etc. in the pulp fiber. In the present invention, which contains a large amount of a resin component, and a component that lowers the coefficient of friction among them is considered to bleed on the surface over time to cause slippage, in the present invention, a pulp fiber is obtained by coexisting colloidal silica and a sulfate band. It is thought that bleed to the surface is suppressed by fixing it efficiently.
以下、実施例及び比較例を挙げて本発明をより具体的に説明するが、本発明はこれら実施例に限定されるものではない。また、例中の部及び%は特に断らない限り、それぞれ質量部及び質量%を示す。 EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, this invention is not limited to these Examples. Moreover, unless otherwise indicated, the part and% in an example show a mass part and mass%, respectively.
1.カッパー価の測定
JIS P 8211:1998に準じて測定した。
1. Measurement of kappa number It was measured according to JIS P 8211: 1998.
2.静摩擦係数の測定
ISO15359:1999に準じて水平式摩擦係数試験機(MU Measurement社製、商品名:「Amontons II」)を用いて、23℃・50%RHの条件で24時間調湿した試料のW面とW面を重ね合わせ、MD方向について測定した。
2. Measurement of static friction coefficient Using a horizontal friction coefficient tester (manufactured by MU Measurement, trade name: “Amonton II”) in accordance with ISO 15359: 1999, a sample conditioned at 23 ° C. and 50% RH for 24 hours The W plane and the W plane were overlapped and measured in the MD direction.
3.滑り傾斜角の測定
JIS P 8147−1994に準じて測定した。この傾斜方法により、23℃・50%RHの条件で24時間調湿した試料のW面とW面を重ね合わせて、同一試料で10回連続して測定し、10回目の値を滑り傾斜角とした。滑り傾斜角が26度以上であれば滑りトラブルは発生しない。
3. Measurement of sliding inclination angle Measured according to JIS P 8147-1994. Using this tilt method, the W surface and the W surface of a sample conditioned at 23 ° C. and 50% RH for 24 hours are overlapped, and the same sample is measured 10 times continuously. It was. If the sliding inclination angle is 26 degrees or more, no slipping trouble occurs.
4.パルプ中の滑り成分の定量
パルプ中の脂肪酸、脂肪族アルコール及びステロール類のエステル化合物は、サンプル管中に2mlのクロロホルムとパルプ試料0.2gを入れて蓋をし、10分間超音波照射してクロロホルム抽出を行い、液体クロマトグラフィー−荷電化粒子検出器で、液体クロマトグラフィーは日本ウォーターズ社製(2695型)、荷電化粒子検出器は米国ESA社製(商品名:「Corona CAD」)を用いて定量した。
4). Determination of slip components in pulp Fatty acid, fatty alcohol and ester compounds of sterols in pulp are covered with 2 ml of chloroform and 0.2 g of pulp sample in a sample tube, and subjected to ultrasonic irradiation for 10 minutes. Chloroform extraction was performed, and a liquid chromatography-charged particle detector was used. Liquid chromatography was manufactured by Nippon Waters (type 2695), and charged particle detector was manufactured by ESA (trade name: “Corona CAD”). And quantified.
5.重袋用包装用紙中のコロイダルシリカ量の測定
JIS P 8251に基づき525℃で灰化した。
5). Measurement of the amount of colloidal silica in the wrapping paper for heavy bags Ashed at 525 ° C. based on JIS P 8251.
6.コロイダルシリカの粒径
ナノトラック粒度分布測定装置 UPA−EX150(日機装製)で測定した。
6). The particle size was measured with a colloidal silica particle size nanotrack particle size distribution measuring apparatus UPA-EX150 (manufactured by Nikkiso).
7.欠点の評価
製造した重袋用包装用紙についてチリ等の欠点を下記の基準で目視判定した。
A:チリ等の欠点なし
B:チリ等の欠点がわずかに存在するが、実用上問題ないレベル
C:チリ等の欠点が多く、実用上問題となるレベル
7). Evaluation of Defects Defects such as dust on the manufactured heavy duty packaging paper were visually judged according to the following criteria.
A: There are no defects such as dust B: There are slight defects such as dust, but there is no problem in practical use C: There are many defects such as dust and is a problem in practical use
<実施例1>
木材チップとしてダグラスファーを用い、液比4、硫化度28%、有効アルカリ17質量%(Na2Oとして)となるように調製した蒸解白液を用いて蒸解温度165℃にて2時間クラフト蒸解を行なった。クラフト蒸解終了後、黒液を分離し、得られたチップを高濃度離解機によって解繊後、濾布で遠心脱水と水洗浄を3回繰り返し、次いでスクリーンにより、未蒸解物を除き、遠心脱水してカッパー価31.7、ステロール類のエステル化合物の含有量が絶乾パルプ質量に対して0.072質量%である蒸解未晒パルプを得た。この未晒パルプについてリファイナーを用いてフリーネスが580(CSF)となるように叩解した。叩解後のパルプスラリーの濃度は3.6質量%であった。
上記叩解後のパルプスラリー2777.8部(固形分換算100部)に、硫酸バンド1.0部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)添加し、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)の含有量が0.8質量%になるように、ツインワイヤフォーマにて抄紙し、米坪84g/m2 の重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 1>
Kraft cooking for 2 hours at a cooking temperature of 165 ° C. using a white liquor prepared using Douglas fir as wood chips, a liquid ratio of 4, a sulfidity of 28%, and an effective alkali of 17% by mass (as Na 2 O) Was done. After completion of kraft cooking, black liquor is separated, and the resulting chips are defibrated by a high-concentration disaggregator, and then centrifugal dewatering and water washing are repeated three times with a filter cloth. Thus, an unbleached pulp having a copper number of 31.7 and a content of ester compounds of sterols of 0.072% by mass with respect to the mass of the absolutely dry pulp was obtained. This unbleached pulp was beaten using a refiner so that the freeness was 580 (CSF). The concentration of the pulp slurry after beating was 3.6% by mass.
Addition of 1.0 part of sulfuric acid band (vs. pulp, converted to solids) and 0.3 part of cationized starch (vs. pulp, converted to solids) to 2777.8 parts of pulp slurry after beating (100 parts converted to solids) The paper was made with a twin wire former so that the content of colloidal silica (trade name: “Snowtex 20”, particle diameter 15 nm) manufactured by Nissan Chemical Industries, Ltd. was 0.8% by mass, and 84 g / m 2 2 heavy paper bags were obtained. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<実施例2>
コロイダルシリカとして日産化学工業社製(商品名:「スノーテックス20L」、粒子径45nm)を用いた以外は実施例1と同様にして重袋用包装用紙を得た。得られた重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 2>
Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that Nissan Chemical Industries (trade name: “Snowtex 20L”, particle size 45 nm) was used as colloidal silica. Table 1 shows the results of the coefficient of static friction and the sliding inclination angle of the obtained heavy duty packaging paper.
<実施例3>
コロイダルシリカとして日産化学工業社製(商品名:「スノーテックスXL」、粒子径50nm)を用いた以外は実施例1と同様にして重袋用包装用紙を得た。得られた重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 3>
Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that Nissan Chemical Industries (trade name: “Snowtex XL”, particle size 50 nm) was used as the colloidal silica. Table 1 shows the results of the coefficient of static friction and the sliding inclination angle of the obtained heavy duty packaging paper.
<実施例4>
コロイダルシリカとして日産化学工業社製(商品名:「スノーテックスYL」、粒子径60nm)を用いた以外は実施例1と同様にして重袋用包装用紙を得た。得られた重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 4>
Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that Nissan Chemical Industries, Ltd. (trade name: “Snowtex YL”, particle diameter 60 nm) was used as colloidal silica. Table 1 shows the results of the coefficient of static friction and the sliding inclination angle of the obtained heavy duty packaging paper.
<実施例5>
コロイダルシリカとして日産化学工業社製(商品名:「スノーテックスZL」、粒子径80nm)を用いた以外は実施例1と同様にして重袋用包装用紙を得た。得られた重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 5>
Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that Nissan Chemical Industries, Ltd. (trade name: “Snowtex ZL”, particle size 80 nm) was used as colloidal silica. Table 1 shows the results of the coefficient of static friction and the sliding inclination angle of the obtained heavy duty packaging paper.
<実施例6>
コロイダルシリカとしてエカケミカルス社製(商品名:「NP882」、粒子径3nm)を用いた以外は実施例1と同様にして重袋用包装用紙を得た。得られた重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 6>
Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that Eka Chemicals (trade name: “NP882”, particle size: 3 nm) was used as colloidal silica. Table 1 shows the results of the coefficient of static friction and the sliding inclination angle of the obtained heavy duty packaging paper.
<実施例7>
叩解後のパルプスラリーに、硫酸バンド1.5部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)で、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)を1.8質量%になるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 7>
In the pulp slurry after beating, 1.5 parts of sulfuric acid band (vs. pulp, solid content), 0.3 parts of cationized starch (vs. pulp, solid content), colloidal silica manufactured by Nissan Chemical Industries, Ltd. (trade name: Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that “Snowtex 20” (particle size 15 nm) was 1.8% by mass. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<実施例8>
叩解後のパルプスラリーに、硫酸バンド0.2部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)で、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)を0.8質量%になるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 8>
In the pulp slurry after beating, 0.2 parts of sulfuric acid band (vs. pulp, solid content), 0.3 parts of cationized starch (vs. pulp, solid content), colloidal silica manufactured by Nissan Chemical Industries (trade name: Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that “Snowtex 20” (particle size 15 nm) was changed to 0.8 mass%. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<実施例9>
叩解後のパルプスラリーに、硫酸バンド0.6部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)で、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)を0.1質量%となるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 9>
In the pulp slurry after beating, 0.6 parts of sulfuric acid band (vs. pulp, solid content) and 0.3 parts of cationized starch (vs. pulp, solid content), colloidal silica manufactured by Nissan Chemical Industries, Ltd. (trade name: Packaging paper for heavy bags was obtained in the same manner as in Example 1 except that “Snowtex 20” (particle size 15 nm) was 0.1 mass%. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<実施例10>
叩解後のパルプスラリーに、硫酸バンド1.0部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)で、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)を「0.5質量%となるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 10>
In the pulp slurry after beating, 1.0 part of sulfuric acid band (vs. pulp, solid content), 0.3 part of cationized starch (vs. pulp, solid content), colloidal silica manufactured by Nissan Chemical Industries, Ltd. (trade name: “Snowtex 20”, particle diameter 15 nm) was obtained in the same manner as in Example 1 except that 0.5% by mass was obtained. The inclusion of ester compounds of sterols of raw pulp Table 1 shows the results of the quantity, the static friction coefficient of the heavy-duty wrapping paper, and the sliding inclination angle.
<実施例11>
実施例6の同じコロイダルシリカ、エカケミカルス社製(商品名:「NP882」、粒子径3nm)を用い、含有量を0.3質量%となるようした以外は実施例1と同様にして重袋用包装用紙を得た。得られた重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 11>
Using the same colloidal silica of Example 6 manufactured by Eka Chemicals Co., Ltd. (trade name: “NP882”, particle size: 3 nm) and using the same content as in Example 1 except that the content was 0.3% by mass. Wrapping paper was obtained. Table 1 shows the results of the coefficient of static friction and the sliding inclination angle of the obtained heavy duty packaging paper.
<実施例12>
(パルプの製造)
木材チップとしてダグラスファーを用い、液比4、硫化度28%、有効アルカリ12.5質量%(Na2Oとして)となるように調製した蒸解白液を用いて、蒸解温度165℃にて2時間クラフト蒸解を行なった。クラフト蒸解終了後、黒液を分離し、得られたチップを高濃度離解機によって解繊後、濾布で遠心脱水と水洗浄を3回繰り返し、次いでスクリーンにより、未蒸解物を除き、遠心脱水してカッパー価70、ステロール類のエステル化合物の含有量が絶乾パルプ質量に対して0.089質量%である蒸解未晒パルプを原料パルプとした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Example 12>
(Manufacture of pulp)
Using Douglas fir as a wood chip, using a cooking white liquor prepared to have a liquid ratio of 4, a sulfidity of 28%, and an effective alkali of 12.5% by mass (as Na 2 O), a cooking temperature of 165 ° C. is 2 Time craft cooking was performed. After completion of kraft cooking, black liquor is separated, and the resulting chips are defibrated by a high-concentration disaggregator, and then centrifugal dewatering and water washing are repeated three times with a filter cloth. For a heavy bag in the same manner as in Example 1 except that the raw pulp was an unbleached pulp having a copper number of 70 and a content of ester compounds of sterols of 0.089% by mass with respect to the mass of the absolutely dry pulp. Wrapping paper was obtained. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<比較例1>
(パルプの製造)
木材チップとしてダグラスファーを用い、液比4、硫化度28%、有効アルカリ11質量%(Na2Oとして)となるように調製した蒸解白液を用いて、蒸解温度165℃にて2時間クラフト蒸解を行なった。クラフト蒸解終了後、黒液を分離し、得られたチップを高濃度離解機によって解繊後、濾布で遠心脱水と水洗浄を3回繰り返し、次いでスクリーンにより、未蒸解物を除き、遠心脱水してカッパー価85、ステロール類のエステル化合物の含有量が絶乾パルプ質量に対して0.097質量%である蒸解未晒パルプを原料パルプとした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Comparative Example 1>
(Manufacture of pulp)
Using Douglas fir as wood chips, kraft for 2 hours at a cooking temperature of 165 ° C, using a white liquor prepared with a liquid ratio of 4, a sulfidity of 28%, and an effective alkali of 11% by mass (as Na 2 O) Cooking was performed. After completion of kraft cooking, black liquor is separated, and the resulting chips are defibrated by a high-concentration disaggregator, and then centrifugal dewatering and water washing are repeated three times with a filter cloth. For a heavy bag in the same manner as in Example 1, except that undiluted pulp having a copper number of 85 and a content of ester compounds of sterols of 0.097% by mass with respect to the mass of the absolutely dry pulp was used as the raw material pulp. Wrapping paper was obtained. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<比較例2>
叩解後のパルプスラリーに、硫酸バンド1.0部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)を添加し、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)の含有量を0.03質量%となるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Comparative example 2>
To the pulp slurry after beating, 1.0 part of sulfuric acid band (vs. pulp, solid content conversion) and 0.3 part of cationized starch (vs. pulp, solid content conversion) are added. Colloidal silica manufactured by Nissan Chemical Industries, Ltd. (product) Name: “Snowtex 20”, particle size 15 nm) A heavy-bag packaging paper was obtained in the same manner as in Example 1 except that the content was 0.03% by mass. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<比較例3>
叩解後のパルプスラリーに、硫酸バンド1.0部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)を添加し、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)の含有量が2.5質量%となるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Comparative Example 3>
To the pulp slurry after beating, 1.0 part of sulfuric acid band (vs. pulp, solid content conversion) and 0.3 part of cationized starch (vs. pulp, solid content conversion) are added. Colloidal silica manufactured by Nissan Chemical Industries, Ltd. (product) Name: “Snowtex 20” (particle size 15 nm) The packaging paper for heavy bags was obtained in the same manner as in Example 1 except that the content was 2.5% by mass. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<比較例4>
叩解後のパルプスラリーに、硫酸バンド0.05部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)を添加し、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)の含有量が0.8質量%になるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Comparative example 4>
To the pulp slurry after beating, 0.05 parts of sulfuric acid band (vs. pulp, solid content conversion) and 0.3 parts of cationized starch (vs. pulp, solid content conversion) are added. Colloidal silica manufactured by Nissan Chemical Industries, Ltd. (product) Name: “Snowtex 20”, particle size 15 nm) was obtained in the same manner as in Example 1 except that the content was 0.8% by mass. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
<比較例5>
叩解後のパルプスラリーに、硫酸バンド2.5部(対パルプ、固形分換算)、カチオン化澱粉0.3部(対パルプ、固形分換算)を添加し、日産化学工業社製コロイダルシリカ(商品名:「スノーテックス20」、粒子径15nm)の含有量が0.8質量%となるようにした以外は実施例1と同様にして重袋用包装用紙を得た。原料パルプのステロール類のエステル化合物の含有量、重袋用包装用紙の静摩擦係数および滑り傾斜角の結果を表1に示した。
<Comparative Example 5>
To the pulp slurry after beating, 2.5 parts of sulfuric acid band (vs. pulp, solid content conversion) and 0.3 parts of cationized starch (vs. pulp, solid content conversion) are added. Colloidal silica manufactured by Nissan Chemical Industries, Ltd. (product) Name: “Snowtex 20” (particle size 15 nm) The packaging paper for heavy bags was obtained in the same manner as in Example 1 except that the content was 0.8% by mass. Table 1 shows the results of the ester compound content of the sterols of the raw pulp, the static friction coefficient of the heavy duty packaging paper, and the sliding inclination angle.
表1から明らかなように、本発明により得られた重袋用包装用紙は抄紙段階あるいは製袋段階において重袋用包装用紙の表面に防滑剤を塗布することなく滑り難いものが得られることがわかる。 As is clear from Table 1, the heavy duty packaging paper obtained according to the present invention can be obtained without slipping on the surface of the heavy duty packaging paper without applying an anti-slip agent to the surface of the heavy duty packaging paper. Recognize.
本発明により、硫酸バンドの特定量を未晒パルプに内添して、特定のコロイダルシリカを用紙内に含有させる事により、重袋に、粉体製品を充填して積み重ねた場合にも滑りトラブルは発生しなかった。 According to the present invention, a specific amount of sulfuric acid band is internally added to unbleached pulp, and a specific colloidal silica is contained in the paper, so that slipping troubles can occur even when a heavy bag is filled with powder products and stacked. Did not occur.
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JP2016053223A (en) * | 2014-09-03 | 2016-04-14 | 大王製紙株式会社 | Base paper for slip sheet |
JPWO2021070269A1 (en) * | 2019-10-08 | 2021-04-15 |
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JP2000054283A (en) * | 1999-07-14 | 2000-02-22 | Oji Paper Co Ltd | Kraft paper |
JP2005002516A (en) * | 2003-06-13 | 2005-01-06 | Oji Paper Co Ltd | Moisture-proof laminate and package using the same |
JP2008255512A (en) * | 2007-04-03 | 2008-10-23 | Nippon Zeon Co Ltd | Composition for moisture-proof paper and moisture-proof paper |
WO2011122537A1 (en) * | 2010-03-30 | 2011-10-06 | 王子製紙株式会社 | Unbleached packaging paper |
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JP2016053223A (en) * | 2014-09-03 | 2016-04-14 | 大王製紙株式会社 | Base paper for slip sheet |
JPWO2021070269A1 (en) * | 2019-10-08 | 2021-04-15 | ||
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