JP2020084076A - Adhesive composition for corrugated board - Google Patents

Adhesive composition for corrugated board Download PDF

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JP2020084076A
JP2020084076A JP2018222408A JP2018222408A JP2020084076A JP 2020084076 A JP2020084076 A JP 2020084076A JP 2018222408 A JP2018222408 A JP 2018222408A JP 2018222408 A JP2018222408 A JP 2018222408A JP 2020084076 A JP2020084076 A JP 2020084076A
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adhesive composition
starch
corrugated board
lignin
based adhesive
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一登 佐藤
Kazuto Sato
一登 佐藤
浩司 池下
Koji Ikeshita
浩司 池下
有香 土田
Yuka Tsuchida
有香 土田
貴浩 丸山
Takahiro Maruyama
貴浩 丸山
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Tomoku KK
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Tomoku KK
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Abstract

To provide an adhesive composition for corrugated board excellent in water proofness.SOLUTION: According to the invention, an adhesive composition for corrugated board is provided, in the adhesive composition, a lignin compound is contained in a starch-based adhesive composition. Preferably, the lignin compound is kraft lignin, and the kraft lignin is included by 1-30 mass% with respect to the starch-based adhesive composition.SELECTED DRAWING: Figure 4

Description

本発明は、段ボール用接着剤組成物に関する。 The present invention relates to an adhesive composition for corrugated board.

一般に段ボールは、波状に加工した中しんの段頂に接着剤を塗布し、接着剤が塗布された中しんの段頂にライナを貼り合わせることで製造される。この中しんの段頂とライナとを接着するために澱粉系接着剤組成物を使用することが知られている(特許文献1)。 In general, a corrugated board is manufactured by applying an adhesive to the corrugated top of the middle shin and applying a liner to the top of the middle shin coated with the adhesive. It is known to use a starch-based adhesive composition to bond the top of the middle shin and the liner (Patent Document 1).

特開平10−265755号公報JP, 10-265755, A

しかしながら、澱粉系接着剤組成物は耐水性に乏しいという不都合がある。 However, the starch-based adhesive composition has the disadvantage of poor water resistance.

本発明は、かかる不都合を解消して、耐水性に優れた段ボール用接着剤組成物を提供することを目的とする。 An object of the present invention is to eliminate such inconveniences and provide an adhesive composition for corrugated board which is excellent in water resistance.

かかる目的を達成するために、本発明の段ボール用接着剤組成物は、澱粉系接着剤組成物にリグニン化合物を含むことを特徴とする。 In order to achieve such an object, the adhesive composition for corrugated board of the present invention is characterized in that the starch-based adhesive composition contains a lignin compound.

本発明の段ボール用接着剤組成物によれば、澱粉系接着剤組成物にリグニン化合物を含むため優れた耐水性を得ることができる。 According to the adhesive composition for corrugated board of the present invention, since the starch-based adhesive composition contains the lignin compound, excellent water resistance can be obtained.

また、本発明の段ボール用接着剤組成物は、澱粉系接着剤組成物にクラフトリグニンを含むことを特徴とする。 Further, the adhesive composition for corrugated board of the present invention is characterized in that the starch-based adhesive composition contains kraft lignin.

本発明の段ボール用接着剤組成物によれば、澱粉系接着剤組成物にクラフトリグニンを含むため優れた耐水性を得ることができる。 According to the adhesive composition for corrugated board of the present invention, since the starch-based adhesive composition contains kraft lignin, excellent water resistance can be obtained.

本発明の段ボール用接着剤組成物は、澱粉系接着剤組成物に対して1〜30質量%の範囲のクラフトリグニンを含むことが好ましい。 The corrugated board adhesive composition of the present invention preferably contains kraft lignin in the range of 1 to 30 mass% with respect to the starch-based adhesive composition.

本発明の段ボール用接着剤組成物は、澱粉系接着剤組成物に対して1質量%未満の範囲のクラフトリグニンを含む場合、十分な耐水接着強度を得ることができない場合がある。 When the adhesive composition for corrugated board of the present invention contains kraft lignin in the range of less than 1% by mass based on the starch-based adhesive composition, sufficient water resistant adhesive strength may not be obtained.

さらに、本発明の段ボール用接着剤組成物は、澱粉系接着剤組成物に対して30質量%超の範囲のクラフトリグニンを含む場合、十分な常態接着強度を得ることができない場合がある。 Further, when the adhesive composition for corrugated board of the present invention contains kraft lignin in the range of more than 30% by mass with respect to the starch-based adhesive composition, sufficient normal state adhesive strength may not be obtained.

常態接着強度は、試験用サンプルを水に浸漬せずに、リングクラッシュテスター試験機を用いて測定した接着強度であり、耐水接着強度は、試験用サンプルを20±2℃の水へ10分間浸した後、リングクラッシュテスター試験機を用いて測定した接着強度である。 The normal adhesive strength is an adhesive strength measured by using a ring crush tester tester without immersing the test sample in water, and the water resistant adhesive strength is obtained by immersing the test sample in water at 20±2° C. for 10 minutes. After that, it is the adhesive strength measured using a ring crush tester tester.

図1Aは、本発明の段ボール用接着剤組成物を用いて段ボールを作製する際に使用する固定用治具の使用方法を示す斜視図、図1Bは、図1AのIb−Ib線断面図。FIG. 1A is a perspective view showing a method of using a fixing jig used when producing a corrugated board using the adhesive composition for corrugated board of the present invention, and FIG. 1B is a sectional view taken along line Ib-Ib of FIG. 1A. 図2Aは、本発明の段ボール用接着剤組成物を用いて段ボールを作製する際に使用する固定用治具の使用方法を示す斜視図、図2Bは、図2AのIIb−IIb線断面図。FIG. 2A is a perspective view showing a method of using a fixing jig used when producing a corrugated board using the adhesive composition for corrugated board of the present invention, and FIG. 2B is a sectional view taken along line IIb-IIb of FIG. 2A. リグニン化合物添加率に対する常態接着強度の変化を示すグラフ。The graph which shows the change of normal-state adhesive strength with respect to a lignin compound addition rate. リグニン化合物添加率に対する耐水接着強度の変化を示すグラフ。The graph which shows the change of water resistant adhesive strength with respect to a lignin compound addition rate.

次に、添付の図を参照しながら本発明の実施の形態についてさらに詳しく説明する。 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

本発明の段ボール用接着剤組成物は、澱粉系接着剤組成物にリグニン化合物を含むことを特徴とする。 The adhesive composition for corrugated board of the present invention is characterized in that the starch-based adhesive composition contains a lignin compound.

前記澱粉系接着剤組成物は、澱粉を含んでなるものである。澱粉とは、多数のグルコースが重合した天然の高分子であり、アミロースと、アミロペクチンとによって構成されている。この澱粉を水中で加熱すると、澱粉は吸水して膨張する。ある一定温度になると澱粉が崩壊して分散する。この現象を澱粉の糊化(α化)と呼ぶ。この糊化(α化)した澱粉を用いることで、中しんとライナとを接着させることができる。 The starch-based adhesive composition contains starch. Starch is a natural polymer in which a large amount of glucose is polymerized, and is composed of amylose and amylopectin. When this starch is heated in water, it absorbs water and expands. At a certain temperature, starch disintegrates and disperses. This phenomenon is called gelatinization (gelatinization) of starch. By using this gelatinized (α-ized) starch, the middle shin and the liner can be bonded.

本発明の段ボール用接着剤組成物に用いられる澱粉系接着剤組成物は、澱粉を含むものであればどのようなものでもよく、例えば、いわゆるステインホール方式、ノーキャリア方式、プレミックス方式などの製造方法により得られた澱粉系接着剤組成物を用いることができる。 The starch-based adhesive composition used in the adhesive composition for corrugated board of the present invention may be any one as long as it contains starch, for example, so-called stain hole method, no carrier method, premix method, etc. The starch-based adhesive composition obtained by the production method can be used.

ステインホール方式は、水酸化ナトリウム等のアルカリ性物質で澱粉を糊化させたキャリア部を調製し、キャリア部の調製を行ったタンクに水を加えて、さらに澱粉、ホウ素化合物を加えて混合して澱粉系接着剤組成物を製造する方法である。 The stain-hole method prepares a carrier part in which starch is gelatinized with an alkaline substance such as sodium hydroxide, water is added to the tank in which the carrier part is prepared, and starch and a boron compound are further added and mixed. This is a method for producing a starch-based adhesive composition.

ノーキャリア方式は、澱粉の全量を水酸化ナトリウム等のアルカリ性物質で徐々に膨潤させ、所定の粘度が発現した時点でホウ素化合物を加えて、澱粉系接着剤組成物の澱粉の粘度の増加を停止させることにより所定粘度の澱粉系接着剤組成物を製造する方法である。 In the no-carrier method, the entire amount of starch is gradually swollen with an alkaline substance such as sodium hydroxide, and when a predetermined viscosity is developed, a boron compound is added to stop the increase in starch viscosity of the starch-based adhesive composition. It is a method of producing a starch-based adhesive composition having a predetermined viscosity by performing the above.

プレミックス法は、ステインホール方式のキャリア部の澱粉をα化された澱粉に置き換えて澱粉系接着剤組成物を製造する方法である。キャリア部の澱粉(α化された澱粉)、メイン部の澱粉(α化されていない澱粉)、ホウ素化合物を前もって一定比率で混合しておき、前記混合物に、水と水酸化ナトリウムを加えるだけで、所定粘度の澱粉系接着剤組成物を製造することができる。 The premix method is a method of producing a starch-based adhesive composition by replacing the starch in the carrier portion of the stain-hole method with the gelatinized starch. The carrier part starch (gelatinized starch), the main part starch (non-gelatinized starch) and the boron compound are mixed in a predetermined ratio in advance, and water and sodium hydroxide are simply added to the mixture. It is possible to produce a starch-based adhesive composition having a predetermined viscosity.

本発明の段ボール用接着剤組成物において使用される澱粉は、澱粉であれば特に制限されず、種々の原料に由来する澱粉を使用することができる。例えば、コーンスターチ、ハイアミロースコーンスターチ(ワキシー種のコーンスターチ)、タピオカ澱粉、小麦澱粉、馬鈴薯澱粉、かんしょ澱粉、わらび澱粉、米澱粉(例えば、もち米澱粉及び粳米澱粉)、豆澱粉(例えば、緑豆澱粉、えんどう豆澱粉、小豆澱粉及びそら豆澱粉)などを単独で使用することができ、あるいは混合して使用することもできる。 The starch used in the adhesive composition for corrugated board of the present invention is not particularly limited as long as it is starch, and starch derived from various raw materials can be used. For example, cornstarch, high amylose cornstarch (waxy variety cornstarch), tapioca starch, wheat starch, potato starch, cane starch, warabi starch, rice starch (for example, glutinous rice starch and glutinous rice starch), bean starch (for example, mung bean starch, Pea starch, adzuki bean starch and broad bean starch) and the like can be used alone or in a mixture.

澱粉系接着剤組成物を調製する場合の倍水率は、好ましくは2.0〜4.0とすることができる。倍水率が2.0未満であると澱粉が糊化するために十分な水分が欠如して接着不良が発生しやすくなり、倍水率が4.0を超えると澱粉系接着剤組成物の固形分濃度が低下することで初期接着発現が低下する場合がある。倍水率とは、澱粉系接着剤組成物における(全水量/全澱粉量)の質量比を意味する。 When preparing the starch-based adhesive composition, the water doubling ratio can be preferably set to 2.0 to 4.0. If the water doubling ratio is less than 2.0, the starch will be gelatinized, so that sufficient water content will be lacking, resulting in poor adhesion, and if the water doubling ratio exceeds 4.0, the starch-based adhesive composition When the solid content concentration decreases, the initial adhesion development may decrease. The double water rate means a mass ratio of (total water amount/total starch amount) in the starch-based adhesive composition.

また、上記の澱粉は、酸化、エステル化、エーテル化などを施した澱粉であってもよく、制限なく本発明に使用することができる。さらに、本発明の段ボール用接着剤組成物には、未糊化澱粉が含まれていてもよい。 Further, the above starch may be a starch which has been oxidized, esterified, etherified, etc., and can be used in the present invention without limitation. Further, the adhesive composition for corrugated board of the present invention may contain ungelatinized starch.

本発明の段ボール用接着剤組成物は、上述した澱粉系接着剤組成物に、リグニン化合物を含む。 The adhesive composition for corrugated board of the present invention contains a lignin compound in the above-mentioned starch-based adhesive composition.

本発明の段ボール用接着剤組成物に用いられるリグニン化合物としては、クラフトリグニン、リグニンスルホン酸カルシウム、リグニンスルホン酸マグネシウム、リグニンスルホン酸ナトリウムなどを用いることができるが、好ましくは、クラフトリグニンを用いる。 As the lignin compound used in the adhesive composition for corrugated board of the present invention, kraft lignin, calcium lignin sulfonate, magnesium lignin sulfonate, sodium lignin sulfonate and the like can be used, but kraft lignin is preferably used.

クラフトリグニンは、クラフト法と呼ばれる化学パルプ化法(水酸化ナトリウム、硫化ナトリウムなどで高温高圧反応させる手法)由来のリグニン化合物である。クラフトリグニンは、紙パルプを製造する際に生じる排液中(黒液)に溶出するため、この排液を濃縮、乾燥することで、粉末状のクラフトリグニンとして単離される。このクラフトリグニンは、ほぼ全量を燃料として使われており、その他の工業的な利用用途はほとんど認められない。 Kraft lignin is a lignin compound derived from a chemical pulping method called Kraft method (a method of reacting at high temperature and high pressure with sodium hydroxide, sodium sulfide, etc.). Kraft lignin elutes in the effluent (black liquor) produced during the production of paper pulp, so by concentrating and drying this effluent, it is isolated as powdered kraft lignin. Almost all of this craft lignin is used as a fuel, and other industrial applications are hardly recognized.

本発明の段ボール用接着剤組成物においては、澱粉系接着剤組成物に対して1〜30質量%配合することが好ましい。 In the adhesive composition for corrugated board of the present invention, it is preferable to add 1 to 30% by mass to the starch-based adhesive composition.

本発明の段ボール用接着剤組成物には、ホウ素化合物を配合してもよい。ホウ素化合物としては、例えば、ホウ砂、ホウ酸、メタホウ酸ナトリウムなどを挙げることができる。 A boron compound may be added to the adhesive composition for corrugated board of the present invention. Examples of the boron compound include borax, boric acid, sodium metaborate and the like.

本発明の段ボール用接着剤組成物には、アルカリ性物質を配合してもよい。アルカリ性物質としては、例えば、水酸化ナトリウム(苛性ソーダ)、水酸化カリウム、水酸化カルシウム、炭酸水素ナトリウム、炭酸水素カルシウム、炭酸水素カリウムなどを挙げることができる。 An alkaline substance may be added to the adhesive composition for corrugated board of the present invention. Examples of the alkaline substance include sodium hydroxide (caustic soda), potassium hydroxide, calcium hydroxide, sodium hydrogen carbonate, calcium hydrogen carbonate, potassium hydrogen carbonate and the like.

次に、本発明の実施例及び比較例を示す。 Next, examples and comparative examples of the present invention will be shown.

本発明の実施例及び比較例においては、ステインホール方式によって澱粉系接着剤組成物を調製した。その後、澱粉系接着剤組成物にクラフトリグニンを加えて段ボール用接着剤組成物を調製し、接着強度を測定した。 In the examples and comparative examples of the present invention, starch-based adhesive compositions were prepared by the stain hole method. Then, Kraft lignin was added to the starch-based adhesive composition to prepare an adhesive composition for corrugated board, and the adhesive strength was measured.

本発明の実施例及び比較例において、接着強度試験に使用した段ボールは、JIS−Z−1516で規定されたAフルート(段の高さが4.5〜5.0mmの範囲、段の数が30cm当たり約34±2段である)であり、耐水処理が施された耐水Kライナ、耐水中しんを使用した。 In the examples and comparative examples of the present invention, the corrugated board used for the adhesive strength test was the A flute (the height of the steps was in the range of 4.5 to 5.0 mm, the number of steps was defined by JIS-Z-1516. It is about 34±2 steps per 30 cm), and a water resistant K liner and water resistant shin which have been subjected to a water resistant treatment were used.

[実施例1〜10]
まず、40℃の水175mlにコーンスターチ(昭和産業株式会社製)12.5gを分散してスラリーを作製した。次に、8.8mol/lの水酸化ナトリウム水溶液8mlを、前記スラリーを撹拌しながら、ゆっくり滴下して加え10分間撹拌して糊化させ、キャリア部を調製した。
[Examples 1 to 10]
First, 12.5 g of cornstarch (manufactured by Showa Sangyo Co., Ltd.) was dispersed in 175 ml of water at 40° C. to prepare a slurry. Next, 8 ml of a 8.8 mol/l sodium hydroxide aqueous solution was slowly added dropwise while stirring the slurry, and the mixture was stirred for 10 minutes to be gelatinized to prepare a carrier part.

次に、前記キャリア部に、40℃の水193ml、コーンスターチ(昭和産業株式会社製)112.5g、ホウ砂2.31gを加えて澱粉系接着剤組成物を調製した。その後、澱粉系接着剤組成物を撹拌しながらクラフトリグニンを加え、さらに10分間撹拌して段ボール用接着剤組成物を調製した。前記クラフトリグニンは、澱粉系接着剤組成物に対して、1〜30質量%の範囲で変量して加えた。 Next, 193 ml of water at 40° C., 112.5 g of cornstarch (manufactured by Showa Sangyo Co., Ltd.) and 2.31 g of borax were added to the carrier part to prepare a starch-based adhesive composition. After that, kraft lignin was added while stirring the starch-based adhesive composition, and further stirred for 10 minutes to prepare an adhesive composition for corrugated board. The craft lignin was added in a variable amount in the range of 1 to 30% by mass with respect to the starch-based adhesive composition.

[比較例1]
クラフトリグニンを加えなかった以外は、実施例1〜10と全く同一の方法で、澱粉系接着剤組成物を得た。
[Comparative Example 1]
A starch-based adhesive composition was obtained in the same manner as in Examples 1 to 10 except that Kraft lignin was not added.

[固定用治具]
図1A及びBに示すように、固定用治具1は、直方体形状の金属板からなる台座3と、
台座3の互いに向かい合う辺を接続する側面視コ字状の取手2と、取手2が取着されている反対側の面に溶着されているL字状のピン部材4とを備えている。ピン部材4は、台座3の一方の長辺に沿って等間隔にかつ短辺と平行に複数(図1Aでは、10本)設けられており、L字状のピン部材4の先端が他方の長辺を指向している。
[Fixing jig]
As shown in FIGS. 1A and 1B, the fixing jig 1 includes a pedestal 3 made of a rectangular parallelepiped metal plate,
The pedestal 3 is provided with a U-shaped handle 2 that connects opposite sides of the pedestal 3, and an L-shaped pin member 4 that is welded to the opposite surface to which the handle 2 is attached. A plurality of pin members 4 (10 in FIG. 1A) are provided at equal intervals along one long side of the pedestal 3 and in parallel with the short side, and the tip of the L-shaped pin member 4 is the other. It is oriented to the long side.

片面段ボール7は、上ライナ5の裏面に、波状に加工された中しん6の段頂8aが接着されることで形成されている。片面段ボール7を形成する上ライナ5と中しん6との間には、段と並行であって、片面段ボール7の一方の長辺から他方の長辺に向かって貫通する貫通孔10が形成されている。 The single-sided corrugated board 7 is formed by adhering the corrugated stepped top 8a of the middle shin 6 to the back surface of the upper liner 5. A through hole 10 is formed between the upper liner 5 and the middle shin 6 forming the single-sided corrugated board 7 in parallel with the step and penetrating from one long side of the single-sided corrugated board 7 toward the other long side. ing.

このため、前記貫通孔10に、ピン部材4を挿入すると、ピン部材4の上面に上ライナ5の裏面が係止されるため、固定用治具1に片面段ボール7を取り付けることができる。 Therefore, when the pin member 4 is inserted into the through hole 10, the back surface of the upper liner 5 is locked to the upper surface of the pin member 4, so that the single-faced cardboard 7 can be attached to the fixing jig 1.

[試験用サンプル作成(実施例1〜10)]
まず、上記のように調製した実施例1〜10の段ボール用接着剤組成物9をガラス板11に均一に塗布した。
[Preparation of test sample (Examples 1 to 10)]
First, the corrugated board adhesive composition 9 of Examples 1 to 10 prepared as described above was uniformly applied to the glass plate 11.

次に、50mm(段と平行方向)×85mm(段と直角方向)の大きさの片面段ボール7(構成:耐水Kライナ、280g/mと耐水中しん200g/m)を固定用治具1に取り付け、取手2を把持して片面段ボール7の中しん6側をガラス板11に乗せ、中しん6の段頂8bに段ボール用接着剤組成物9を転移させた。 Next, a jig for fixing a single-faced corrugated board 7 (structure: water-resistant K liner, 280 g/m 2 and water-resistant shin 200 g/m 2 ) having a size of 50 mm (parallel to the step)×85 mm (direction perpendicular to the step). 1, the handle 2 was grasped, the side of the inner shin 6 of the single-sided corrugated board 7 was placed on the glass plate 11, and the adhesive composition 9 for corrugated board was transferred to the top 8b of the middle shin 6.

次に、図2A及びBに示すように、60mm(段と平行方向)×100mm(段と直角方向)の大きさの下ライナ12(構成:耐水Kライナ280g/m)の裏面を上にして、180℃に加熱したホットプレート13に乗せ、固定用治具1に取り付けた状態の片面段ボール7を下ライナ12の裏面上に乗せ、650gの荷重を5秒かけて圧着し、試験用サンプルを作製した。 Next, as shown in FIGS. 2A and 2B, the back surface of the lower liner 12 (configuration: water resistant K liner 280 g/m 2 ) having a size of 60 mm (direction parallel to the step)×100 mm (direction perpendicular to the step) is faced up. The hot plate 13 heated to 180° C., the single-faced cardboard 7 attached to the fixing jig 1 is placed on the back surface of the lower liner 12, and a load of 650 g is pressed for 5 seconds to perform a test sample. Was produced.

[試験用サンプル作成(比較例1)]
比較例1の澱粉系接着剤組成物は、上記に記載した実施例1〜10と全く同一の方法で、試験用サンプルを作成した。
[Preparation of test sample (Comparative Example 1)]
For the starch-based adhesive composition of Comparative Example 1, test samples were prepared by the same method as in Examples 1 to 10 described above.

[常態接着強度の測定]
上記試験用サンプルを水に浸漬しない場合の常態接着強度を、リングクラッシュテスター試験機(日本TMC社製)を用いて測定した(JIS−Z−0402:1995に準拠)。毎分13±3mmの速度で荷重を加え、中しん6のすべての段頂8bから下ライナ9が剥がれた時の接着強度を常態接着強度(N)とした。リグニン化合物としてのクリフトリグニンを澱粉系接着剤組成物に加えた際の常態接着強度の結果を表1並びに図3に示す。
[Measurement of normal adhesive strength]
The normal adhesive strength when the test sample was not immersed in water was measured using a ring crush tester tester (manufactured by Japan TMC Co., Ltd.) (in accordance with JIS-Z-0402:1995). A load was applied at a rate of 13±3 mm/min, and the adhesive strength when the lower liner 9 was peeled off from all the tops 8b of the middle shin 6 was defined as the normal adhesive strength (N). Table 1 and FIG. 3 show the results of the normal-state adhesive strength when clift lignin as a lignin compound was added to the starch-based adhesive composition.

[耐水接着強度の測定]
上記試験用サンプルの耐水接着強度を、20±2℃の水へ10分間浸漬した後、リングクラッシュテスター試験機(日本TMC社製)を用いて測定した(JIS−Z−0402:1995に準拠)。毎分13±3mmの速度で荷重を加え、中しん6のすべての段頂8bから下ライナ9が剥がれた時の接着強度を耐水接着強度(N)とした。リグニン化合物としてのクリフトリグニンを澱粉系接着剤組成物に加えた際の耐水接着強度の結果を表1並びに図4に示す。
[Measurement of water resistant adhesive strength]
The water resistant adhesive strength of the test sample was measured by using a ring crush tester tester (manufactured by Japan TMC Co., Ltd.) after immersing in water at 20±2° C. for 10 minutes (according to JIS-Z-0402:1995). .. A load was applied at a rate of 13±3 mm/min, and the adhesive strength when the lower liner 9 was peeled off from all the tops 8b of the middle shin 6 was defined as the water resistant adhesive strength (N). Table 1 and FIG. 4 show the results of the water-resistant adhesive strength when clift lignin as a lignin compound was added to the starch-based adhesive composition.

[結果]
図3及び図4から、本発明の段ボール用接着剤組成物(実施例1〜10)は、澱粉系接着剤組成物(比較例1)と比較して優れた耐水性を有していることが明らかである。
[result]
From FIGS. 3 and 4, the adhesive composition for corrugated board of the present invention (Examples 1 to 10) has excellent water resistance as compared with the starch-based adhesive composition (Comparative Example 1). Is clear.

さらに、本発明の澱粉系接着剤組成物に対して1〜30質量%の範囲のクラフトリグニンを含む段ボール用接着剤組成物は、澱粉系接着剤組成物(比較例1)と比較して優れた耐水性を有していることが明らかである。 Furthermore, the adhesive composition for corrugated board containing kraft lignin in the range of 1 to 30% by mass with respect to the starch-based adhesive composition of the present invention is superior to the starch-based adhesive composition (Comparative Example 1). It is clear that it has water resistance.

1…固定用治具、 2…取手、 3…台座、4…ピン部材、5…上ライナ、 6…中しん、 7…片面段ボール、 8a、8b…段頂、 9…段ボール用接着剤組成物、 10…貫通孔、 11…ガラス板、 12…下ライナ、 13…ホットプレート DESCRIPTION OF SYMBOLS 1... Fixing jig, 2... Handle, 3... Pedestal, 4... Pin member, 5... Upper liner, 6... Middle shin, 7... Single-sided corrugated board, 8a, 8b... Step top, 9... Adhesive composition for corrugated board , 10... Through hole, 11... Glass plate, 12... Lower liner, 13... Hot plate

Claims (3)

澱粉系接着剤組成物にリグニン化合物を含むことを特徴とする段ボール用接着剤組成物。 An adhesive composition for corrugated board, wherein the starch-based adhesive composition contains a lignin compound. 請求項1記載の段ボール用接着剤組成物において、
前記リグニン化合物は、クラフトリグニンであることを特徴とする段ボール用接着剤組成物。
The adhesive composition for corrugated board according to claim 1,
The said lignin compound is craft lignin, The adhesive composition for cardboards characterized by the above-mentioned.
請求項2記載の段ボール用接着剤組成物において、
澱粉系接着剤組成物に対して1〜30質量%の範囲のクラフトリグニンを含むことを特徴とする段ボール用接着剤組成物。
The adhesive composition for corrugated board according to claim 2,
An adhesive composition for corrugated board, comprising Kraft lignin in the range of 1 to 30% by mass with respect to the starch-based adhesive composition.
JP2018222408A 2018-11-28 2018-11-28 Adhesive composition for corrugated board Pending JP2020084076A (en)

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