JP3502421B2 - Water-soluble adhesive - Google Patents

Water-soluble adhesive

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Publication number
JP3502421B2
JP3502421B2 JP24028693A JP24028693A JP3502421B2 JP 3502421 B2 JP3502421 B2 JP 3502421B2 JP 24028693 A JP24028693 A JP 24028693A JP 24028693 A JP24028693 A JP 24028693A JP 3502421 B2 JP3502421 B2 JP 3502421B2
Authority
JP
Japan
Prior art keywords
adhesive
parts
water
gelatin
glue
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP24028693A
Other languages
Japanese (ja)
Other versions
JPH0770543A (en
Inventor
之男 岡田
信幸 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Printing Ink Mfg Co Ltd
Original Assignee
Tokyo Printing Ink Mfg Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Printing Ink Mfg Co Ltd filed Critical Tokyo Printing Ink Mfg Co Ltd
Priority to JP24028693A priority Critical patent/JP3502421B2/en
Publication of JPH0770543A publication Critical patent/JPH0770543A/en
Application granted granted Critical
Publication of JP3502421B2 publication Critical patent/JP3502421B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、長期保存した場合にも
組成物の内容が変化せず、又、本発明の接着剤を塗布さ
れた製品が乾燥した状態で長期間放置した場合にも、接
着剤の柔軟性が失われず、その塗布面に亀裂を生ぜず、
硬く脆くならない接着強度の優れた水溶性接着剤に関す
るものである。 【0002】 【従来の技術】従来より、汎用接着剤として親水性のゼ
ラチン接着剤やニカワ接着剤が、一般に使用されてい
る。ゼラチンやニカワを含む組成物(以下、ゼラチン系
と称する)を接着剤として使用する場合、水を多量に含
んだゼリー状配合物を作成して、加温(通常60〜70℃)
しゾル化させ、取扱いが容易な液体となった配合物を接
着剤として使用している。ゼラチン系接着剤は、ゾルが
冷えて室温に戻りゼリー状(ゲル化)になったところで
初期接着力が発現し、その後、徐々に水分が失われ水分
量が外気と平衡になったところで、更に強固な接着が得
られる。このようにゼラチン系接着剤は、一般に水に溶
解した加温溶液として用いられ、塗布すると直ちに冷却
されてゾル−ゲル変化を起こすので作業性が良く、乾燥
すると耐熱性に優れた皮膜を形成する。 【0003】特に、その特性として加熱すると溶解し、
冷えると容易に固化する、いわゆるゾル−ゲル可逆変化
により初期接着力の発現が速いという利点を有し、木
材、紙、布等の接着に優れ、特に紙器や製本用の接着剤
として盛んに使用されている。しかし、ゼラチン系接着
剤は、一般に水分が残存した状態でのゾル−ゲル変化に
よる接着方法であり、外気(温度及び湿度)により組成
物中の水分量が変化し易く、それに応じて接着力も変化
し、接着時の接着強度が弱くなる欠点がある。このよう
な性質から紙器や製本用接着剤として使用した場合に
も、接着操作の直後に接着部の裁断を行うと、被接着部
にしわが生じ易いという問題点がある。 【0004】しかも、ゼラチン系接着剤は、被接着面に
塗布し長期間乾燥した状態で放置すると、柔軟性が失わ
れ、硬く脆くなり、単行本や雑誌などの背の部分に塗布
されたこの接着剤は、亀裂を生じボロボロとなり剥がれ
てしまい、接着強度が著しく低下してしまう欠点があ
る。従来より、この欠点を解決するために、ゼラチン系
接着剤にグリセリンを配合することが試みられている
が、その目的をより良く達成するために多めに加えると
ゲル硬度が低下し初期接着性が低下する欠点があり、し
かも、塗布後に乾燥状態で放置すると柔軟性が次第に失
われる。柔軟性が失われる原因は、接着剤に配合された
常温で液体であるグリセリン等の可塑剤は、接着後紙等
の多孔質被着体へ徐々に滲み出し接着剤から系外へ逸脱
してしまうからである。このため、グリセリンを配合す
るだけでは満足する解決法では無かった。 【0005】 【本発明が解決しようとする課題】そこで本発明者ら
は、被着体に塗布された接着剤が乾燥された雰囲気中に
長期放置された場合にも、柔軟性が失われず、塗布面に
亀裂を生じたり、剥がれたりせず、優れた接着強度が維
持できるものであり、木、紙、布、各種コート紙、印刷
インキ塗工紙等に対する接着性と初期接着力を改善する
ために、添加助剤として特定割合のグリセリンと、常温
で固体又は高粘度の多価アルコール及びその誘導体であ
るペント−ス、蔗糖及び/又はデンプンを配合すること
で、上記欠点を解決したのである。 【0006】 【課題を解決するための手段】すなわち本発明は、A.
ゼラチン及び/又はニカワ100重量部(以後、部と
略)、B.グリセリン30〜80部、C.常温で固体又
は高粘度の多価アルコール及び/又はその誘導体である
ペント−ス、蔗糖及び/又はデンプン10〜80部、
D.水50〜200部、以上A.B.C.及びD.の4
成分を主成分とするものであり、その粘度が500〜100,0
00mPa・s/60℃であることを特徴とする水溶性接着
剤である。この際に糖類及び/その誘導体を使用する
と、より優れた本発明の水溶性接着剤が得られるもので
ある。本発明で使用するゼラチン又はニカワとは、従来
より接着剤として用いられているものであり、アニマル
グルー、ニカワと呼ばれるものも含むものである。尚、
ニカワは、動物の皮、骨、筋、腱などの原料から約80℃
以上の高温で抽出されるものであり、不純物を多く含ん
でいる。これに対して、ゼラチンは、ニカワの原料より
も良質の原料から約50〜80℃で抽出され、ニカワより透
明度が高く、ゼリー強度(JIS-K-6503)が高く、不純物
が極めて少ないものである。 【0007】前記のゼラチン系の溶液としては、従来か
らあるコンパウンドグルー、すなわちゼラチンに可塑
剤、消泡剤、防腐剤およびその他の物質を本発明の水溶
性接着剤の性質を損なわない程度で配合され、これらの
コンパウンドグルーとしては、粉末および溶液(分散
液)であっても良い。例えば、本発明の水溶性接着剤に
可塑剤を配合すると、これにより固化後の接着剤層の可
撓性が向上するため製本用接着剤として使用可能であ
る。この際に使用する可塑剤としては、従来からゼラチ
ン系接着剤に用いられているものを必要に応じて加えて
も良く、例えばN−エチル−O−トルエンスルホンアミ
ド、N−エチル−P−トルエンスルホンアミドなどのトル
エンスルホンアミド系可塑剤等が挙げられる。本発明で
用いるB.グリセリンは、被着体に塗布後の接着剤塗布
層の系全体の柔軟性の改良に効果を発揮するものであ
る。 【0008】本発明で用いられるC.常温で固体又は高
粘度の多価アルコール及び/又はその誘導体であるペン
ト−ス、蔗糖及び/又はデンプンは、接着の際の初期接
着性が低下せず被着体面に塗布された接着剤層が乾燥さ
れた状態で放置されても、柔軟性が失われず亀裂の発生
を防ぐものであり、単糖類、二糖類、三糖類及び多糖類
等糖類及びその誘導体である、ペントース、庶糖及びで
んぷんが挙げられる。本発明の水溶性接着剤において、
グリセリンの配合割合は、ゼラチン固形分100部に対し
て、30〜80部となるように配合するのが好ましい。80部
より多いと本発明の水溶性接着剤のゼリー強度が低下
し、良好な初期接着強度が得られず好ましくない、又、
30重量部より少ないと被接着面に塗布乾燥後の接着剤層
の柔軟性が得られず好ましくない。 【0009】本発明の水溶性接着剤において、常温で固
体又は高粘度の多価アルコール及びその誘導体であるペ
ント−ス、蔗糖及び/又はデンプンの配合割合は、ゼラ
チン固形分100部に対して、10〜80部となるように配合
する。80部より多いと被着面の柔軟性が乏しくなり、
又、10部より少ないと被着面の柔軟性保持効果が乏しく
なる。特に10〜30部を配合すると本発明の効果が一層発
揮されるので好ましい。本発明の水溶性接着剤におい
て、水の配合割合は、ゼラチン固形分100部に対して、5
0〜200部となるように配合するのが好ましい。200部よ
り多いと本発明の水溶性接着剤のゼリー強度が低下し、
初期接着強度が低下する恐れがある、又、50部より少な
いと接着時の水分揮発による粘度変化が大きく作業適性
(塗布し易さ)に乏しく好ましくない。 【0010】本発明の水溶性接着剤の粘度は、500〜10
0,000mPa・s/60℃(JIS-K-6838に準拠)が好まし
い。100,000mPa・s/60℃より大きいと塗布作業性
が悪くなり、被着面への濡れも悪く良好な接着強度が得
られない、また、500mPa・s/60℃より小さいとゼ
リー強度が低くなって良好な初期接着力が得られず好ま
しくない。本発明の水溶性接着剤の製造には、従来より
ゼラチン系接着剤製造の際に行われている通常の方法で
行えばよい。最も一般的な方法は、最初にゼラチン(ニ
カワ)に水を加え溶解した後、グリセリン、及び常温で
固体又は高粘度の多価アルコール及び/又はその誘導体
であるペント−ス、蔗糖及び/又はデンプンを配合し60
〜70℃に加温しながら撹拌混合すると、均一に分散又は
溶解される。尚、本発明の水溶性接着剤のゼラチン(ニ
カワ)濃度は、重量濃度で25〜50%を含有したものが、
特に取扱が容易であり好ましい。 【0011】 【実施例】以下に、実施例及び比較例を述べる。 実施例1 ゼラチン(第1種ゼラチン、JIS-K-6503測定)100部を
水100部に溶解し、これにグリセリン70部及び庶糖20部
を加えて攪拌混合して、本発明の水溶性接着剤を得た。 実施例2 ゼラチン(実施例1で使用)50部及びニカワ(第1種ニ
カワ、JIS-K-6503測定)50部を水80部に溶解し、これに
グリセリン50部及びペントース40部を加えて攪拌混合し
て、本発明の水溶性接着剤を得た。 実施例3 ニカワ(実施例2で使用)100部を水120部に溶解し、こ
れにグリセリン50部及びでんぷん40部を加えて攪拌混合
して、本発明の水溶性接着剤を得た。 【0012】比較例1 ゼラチン(第1種ゼラチン)100部を水100部に溶解し、
これにグリセリン100部及び庶糖20部を加えて攪拌混合
して、ゼラチン系接着剤を得た。 比較例2 ゼラチン(第1種ゼラチン)100部を水100部に溶解し、
これにグリセリン20部及びでんぷん50部を加えて攪拌混
合して、ゼラチン系接着剤を得た。 比較例3 ゼラチン(第1種ゼラチン)100部を水150部に溶解し、
これにグリセリン40部及び庶糖100部を加えて攪拌混合
して、ゼラチン系接着剤を得た。 比較例4 ゼラチン(第1種ゼラチン)100部を水100部に溶解し、
これにグリセリン40部及び庶糖5部を加えて攪拌混合し
て、ゼラチン系接着剤を得た。 比較例5 ニカワ(第1種ニカワ)100部を水300部に溶解し、これ
にグリセリン50部及びでんぷん50部を加えて攪拌混合し
て、ゼラチン系接着剤を得た。 比較例6 ニカワ(第1種ニカワ)100部を水40部に溶解し、これ
にグリセリン50部及びでんぷん50部を加えて攪拌混合し
て、ゼラチン系接着剤を得た。 【0013】以下に実施例1〜実施例3及び比較例1〜
比較例6で得られた各接着剤の粘度、初期接着力、接着
性、及び被着体に塗布後の接着剤層の柔軟性について、
次の方法により測定し、その結果を 【表1】に示す。 (1).粘度 JIS-K-6838に準ずる。 (2).初期接着力 コート紙上に接着剤を60℃で厚さ50μに塗布し、その上
から同一コート紙をハンドローラーで圧着し、その直後
に引張試験機によりT形ピール強度を測定する。 ◎ ………… 200g/15mm以上。 ○ ………… 200〜100g/15mm。 × ………… 100g/15mm未満。 【0014】(3).接着性 (1).で作成した接着試料を23℃、50%RH雰囲気下で、一
週間放置後に、T形ピール強度試験を行う。 ◎ ………… 材質破壊あり。 × ………… 材質破壊なし。 (4).柔軟性 接着剤をラフ紙に厚さ50μに塗布して、23℃、20%RHの
条件下で30日間放置した後、試料を二つ折りにして、接
着層が割れるか、どうかを、下記の条件で評価する。 ◎ ………… 柔軟性があり、割れない。 △ ………… 柔軟性がなく、折れるが、くっついてい
る。 × ………… 接着層が割れて、紙が切断する。 【0015】 【発明の効果】本発明の水溶性接着剤は、接着後その組
成物が滲み出し気化したりせず、長く接着剤中に留ま
り、柔軟性を保持するため雑誌や単行本などの製本に用
いた場合に開閉の繰り返しにより、本の背部の接着剤塗
布層に亀裂を生じたり、剥がれたり、割れたりせず接着
強度が長く保持され優れた接着剤を提供するものであ
る。しかも、本発明の水溶性接着剤は水に容易に溶解す
るために紙器や書籍等の接着剤として使用した場合、古
紙から接着剤が容易に分離し、最近叫ばれているリサイ
クルとしての古紙回収に最適な接着剤である。
Description: BACKGROUND OF THE INVENTION The present invention relates to a composition for which the content of the composition does not change even when stored for a long period of time, and the product coated with the adhesive of the present invention is dried. Even if left for a long time in a state where the adhesive is not lost, the flexibility of the adhesive is not lost, and the applied surface does not crack,
The present invention relates to a water-soluble adhesive which does not become hard and brittle and has excellent adhesive strength. Conventionally, hydrophilic gelatin adhesives and glue adhesives have been generally used as general-purpose adhesives. When a composition containing gelatin or glue (hereinafter, referred to as a gelatin type) is used as an adhesive, a jelly-like composition containing a large amount of water is prepared and heated (usually at 60 to 70 ° C).
A compound that has been converted into a sol and has become a liquid that is easy to handle is used as an adhesive. The gelatin-based adhesive develops an initial adhesive force when the sol cools to room temperature and returns to a room temperature and becomes jelly-like (gelled), and then gradually loses water, and when the amount of water becomes equilibrium with the outside air, Strong adhesion is obtained. As described above, the gelatin-based adhesive is generally used as a heating solution dissolved in water, and is cooled immediately upon application to cause a sol-gel change, so that workability is good, and when dried, a film having excellent heat resistance is formed. . [0003] In particular, it melts when heated,
It has the advantage that it rapidly solidifies when it cools down, that is, the so-called reversible sol-gel change, so that the initial adhesive strength is fast, and it is excellent in bonding wood, paper, cloth, etc., and is especially used as an adhesive for paper containers and bookbinding. Have been. However, a gelatin-based adhesive is generally an adhesive method based on a sol-gel change in a state in which water remains, and the amount of water in the composition is easily changed by the outside air (temperature and humidity), and the adhesive force changes accordingly. However, there is a disadvantage that the bonding strength at the time of bonding becomes weak. Due to such a property, even when used as a paper container or an adhesive for bookbinding, if the bonding portion is cut immediately after the bonding operation, there is a problem that wrinkles are easily generated in the bonded portion. Moreover, when the gelatin-based adhesive is applied to the surface to be adhered and left in a dry state for a long period of time, it loses its flexibility, becomes hard and brittle, and is applied to the spine of a book or magazine. The agent has the disadvantage that it cracks, becomes ragged and peels off, and the adhesive strength is significantly reduced. Conventionally, in order to solve this drawback, it has been attempted to add glycerin to the gelatin-based adhesive, but if it is added excessively to achieve the purpose better, the gel hardness decreases and the initial adhesiveness is reduced. It has the disadvantage of lowering, and moreover, gradually loses its flexibility when left in a dry state after coating. The cause of the loss of flexibility is that the plasticizer, such as glycerin, which is a liquid at room temperature and mixed with the adhesive, gradually oozes into the porous adherend such as paper after bonding, and deviates from the adhesive to the outside of the system. It is because. Thus, blending glycerin was not a satisfactory solution. [0005] Therefore, the present inventors have found that even when the adhesive applied to the adherend is left in a dry atmosphere for a long time, the flexibility is not lost. It does not crack or peel off on the coated surface and can maintain excellent adhesive strength, and improves adhesion and initial adhesive strength to wood, paper, cloth, various coated papers, printing ink coated paper, etc. for the glycerin specific ratio as an additive auxiliary agent, polyhydric alcohols and derivatives thereof der solid or highly viscous at room temperature
By blending pentose, sucrose and / or starch , the above-mentioned disadvantage was solved. [0006] That is, the present invention relates to A.I.
100 parts by weight of gelatin and / or glue (hereinafter abbreviated as "part"); Glycerin 30-80 parts, C.I. It is a polyhydric alcohol and / or a derivative of a solid or highly viscous at room temperature
10 to 80 parts of pentose , sucrose and / or starch ,
D. 50 to 200 parts of water; B. C. And D. Of 4
Ingredients are the main components, the viscosity of which is 500-100,0
It is a water-soluble adhesive characterized by having a temperature of 00 mPa · s / 60 ° C. When a saccharide and / or a derivative thereof is used at this time, a more excellent water-soluble adhesive of the present invention can be obtained. The gelatin or glue used in the present invention has been conventionally used as an adhesive, and includes those called animal glue and glue. still,
Nikawa is made from raw materials such as animal skin, bones, muscles and tendons at about 80 ° C.
It is extracted at the above high temperature and contains many impurities. On the other hand, gelatin is extracted from raw materials of higher quality than glue raw materials at about 50-80 ° C, and has higher transparency than glue, higher jelly strength (JIS-K-6503), and extremely few impurities. is there. The above-mentioned gelatin-based solution is prepared by mixing a conventional compound glue, ie, gelatin, with a plasticizer, an antifoaming agent, a preservative and other substances to such an extent that the properties of the water-soluble adhesive of the present invention are not impaired. The compound glue may be a powder or a solution (dispersion). For example, when a plasticizer is added to the water-soluble adhesive of the present invention, the flexibility of the adhesive layer after solidification is improved, so that the adhesive can be used as a bookbinding adhesive. As the plasticizer used at this time, those conventionally used for gelatin-based adhesives may be added as necessary. For example, N-ethyl-O-toluenesulfonamide, N-ethyl-P-toluene Examples include a toluenesulfonamide-based plasticizer such as sulfonamide. B. used in the present invention. Glycerin exerts an effect on improving the flexibility of the entire system of the adhesive applied layer after being applied to the adherend. C. used in the present invention. Pens that are solid or highly viscous polyhydric alcohols and / or derivatives thereof at room temperature
Tooth, sucrose and / or starch do not lose their flexibility and do not lose their flexibility even when the adhesive layer applied to the adherend surface is left in a dried state without lowering the initial adhesiveness at the time of bonding. Pentose, sucrose and saccharides such as monosaccharides, disaccharides , trisaccharides and polysaccharides and derivatives thereof.
Neppon . In the water-soluble adhesive of the present invention,
It is preferable that glycerin is blended in an amount of 30 to 80 parts with respect to 100 parts of gelatin solids. If it is more than 80 parts, the jelly strength of the water-soluble adhesive of the present invention is reduced, and it is not preferable that good initial adhesive strength is not obtained.
If the amount is less than 30 parts by weight, the flexibility of the adhesive layer after coating and drying on the surface to be bonded cannot be obtained, which is not preferable. In the water-soluble adhesive of the present invention, a polyhydric alcohol or a derivative thereof which is solid or has a high viscosity at room temperature is used.
The mixing ratio of glucose, sucrose and / or starch is 10 to 80 parts with respect to 100 parts of solid gelatin. If it is more than 80 parts, the flexibility of the adherend will be poor,
On the other hand, if the amount is less than 10 parts, the effect of maintaining the flexibility of the adhered surface becomes poor. In particular, it is preferable to add 10 to 30 parts because the effect of the present invention is further exhibited. In the water-soluble adhesive of the present invention, the mixing ratio of water is
It is preferable to mix them in an amount of 0 to 200 parts. If it is more than 200 parts, the jelly strength of the water-soluble adhesive of the present invention decreases,
There is a possibility that the initial adhesive strength may be reduced, and if it is less than 50 parts, the change in viscosity due to evaporation of water at the time of adhesion is large, and workability (ease of application) is poor, which is not preferable. The viscosity of the water-soluble adhesive of the present invention is 500 to 10
It is preferably 0.000 mPa · s / 60 ° C. (based on JIS-K-6838). If it is higher than 100,000 mPa · s / 60 ° C., the coating workability deteriorates, the wettability to the adherend surface is poor, and good adhesive strength cannot be obtained. If it is lower than 500 mPa · s / 60 ° C., the jelly strength decreases. It is not preferable because good initial adhesive strength cannot be obtained. The production of the water-soluble adhesive of the present invention may be carried out by a usual method conventionally used in producing a gelatin-based adhesive. The most common method is to first dissolve gelatin in water by adding water, then glycerin, and polyhydric alcohol and / or its derivative which is solid or viscous at room temperature.
Pentose, sucrose and / or starch
When stirred and mixed while heating to ~ 70 ° C, it is uniformly dispersed or dissolved. The water-soluble adhesive of the present invention contains gelatin (glue) at a concentration of 25 to 50% by weight.
It is particularly easy and easy to handle. EXAMPLES Examples and comparative examples will be described below. Example 1 100 parts of gelatin (class 1 gelatin, measured by JIS-K-6503) was dissolved in 100 parts of water, and 70 parts of glycerin and 20 parts of sucrose were added thereto, followed by stirring and mixing. Agent was obtained. Example 2 50 parts of gelatin (used in Example 1) and 50 parts of glue (type 1 glue, measured by JIS-K-6503) are dissolved in 80 parts of water, and 50 parts of glycerin and 40 parts of pentose are added thereto. The mixture was stirred and mixed to obtain a water-soluble adhesive of the present invention. Example 3 100 parts of glue (used in Example 2) was dissolved in 120 parts of water, and 50 parts of glycerin and 40 parts of starch were added thereto and mixed by stirring to obtain a water-soluble adhesive of the present invention. Comparative Example 1 100 parts of gelatin (first type gelatin) was dissolved in 100 parts of water.
To this, 100 parts of glycerin and 20 parts of sucrose were added and mixed by stirring to obtain a gelatin adhesive. Comparative Example 2 100 parts of gelatin (first type gelatin) was dissolved in 100 parts of water,
To this, 20 parts of glycerin and 50 parts of starch were added and mixed with stirring to obtain a gelatin adhesive. Comparative Example 3 100 parts of gelatin (first-type gelatin) was dissolved in 150 parts of water,
To this, 40 parts of glycerin and 100 parts of sucrose were added and mixed with stirring to obtain a gelatin adhesive. Comparative Example 4 100 parts of gelatin (first type gelatin) was dissolved in 100 parts of water,
To this, 40 parts of glycerin and 5 parts of sucrose were added and mixed by stirring to obtain a gelatin adhesive. Comparative Example 5 100 parts of glue (first kind glue) was dissolved in 300 parts of water, and 50 parts of glycerin and 50 parts of starch were added thereto and mixed by stirring to obtain a gelatin adhesive. Comparative Example 6 100 parts of glue (first type glue) was dissolved in 40 parts of water, and 50 parts of glycerin and 50 parts of starch were added thereto and mixed by stirring to obtain a gelatin-based adhesive. Examples 1 to 3 and Comparative Examples 1 to
About the viscosity of each adhesive obtained in Comparative Example 6, initial adhesive strength, adhesiveness, and the flexibility of the adhesive layer after being applied to the adherend,
Measured by the following method, and the results are shown in Table 1. Shown in (1). Viscosity According to JIS-K-6838. (2). Initial adhesive strength Apply an adhesive to coated paper at 60 ° C to a thickness of 50μ, press the same coated paper on it with a hand roller, and immediately measure T-peel strength with a tensile tester. . ◎ ………… 200g / 15mm or more. ○ ………… 200 to 100g / 15mm. X: 100 g / less than 15 mm. (3) Adhesiveness The T-peel strength test is conducted after leaving the adhesive sample prepared in (1) at 23 ° C. and 50% RH atmosphere for one week. ◎ ………… Material destruction. × ………… No material destruction. (4) Apply a flexible adhesive to rough paper to a thickness of 50μ and leave it for 30 days at 23 ° C and 20% RH, then fold the sample in half and see if the adhesive layer breaks. Is evaluated under the following conditions. ◎ ………… It is flexible and does not break. △ ………… Inflexible, broken, but sticking. ×: The adhesive layer is broken and the paper is cut. According to the water-soluble adhesive of the present invention, the composition does not bleed out after bonding, stays in the adhesive for a long time, and retains flexibility to bind a book such as a magazine or book. The present invention provides an excellent adhesive which has a long adhesive strength without cracking, peeling or cracking of the adhesive applied layer on the back of the book by repeated opening and closing when used. Moreover, when the water-soluble adhesive of the present invention is used as an adhesive for paper containers and books, etc. because it is easily dissolved in water, the adhesive is easily separated from the used paper, and the used paper recycling as recently reclaimed is recycled. It is the most suitable adhesive.

フロントページの続き (56)参考文献 特開 昭63−182385(JP,A) 特開 昭63−258976(JP,A) 特開 昭61−246239(JP,A) 特開 昭54−81343(JP,A) 特開 昭53−22539(JP,A) 特開 昭53−17646(JP,A) 特開 昭49−34539(JP,A) 特開 昭62−64877(JP,A) 特開 昭62−45678(JP,A) 特開 昭50−18537(JP,A) 特公 昭8−1765(JP,B1) 特公 昭31−6536(JP,B1) 特許127543(JP,C2) 特許137401(JP,C2) 特許106835(JP,C2) (58)調査した分野(Int.Cl.7,DB名) C09J 4/00 - 201/10 Continuation of the front page (56) References JP-A-63-182385 (JP, A) JP-A-63-258976 (JP, A) JP-A-61-246239 (JP, A) JP-A-54-81343 (JP) JP-A-53-22539 (JP, A) JP-A-53-17646 (JP, A) JP-A-49-34539 (JP, A) JP-A-62-64877 (JP, A) 62-45678 (JP, A) JP-A-50-18537 (JP, A) JP-B-8-1765 (JP, B1) JP-B-31-6536 (JP, B1) Patent 127543 (JP, C2) Patent 137401 (JP, C2) Patent 106835 (JP, C2) (58) Fields investigated (Int. Cl. 7 , DB name) C09J 4/00-201/10

Claims (1)

(57)【特許請求の範囲】 【請求項1】 A.ゼラチン及び/又はニカワ100重
量部、B.グリセリン30〜80重量部、C.常温で固
体又は高粘度の多価アルコール及び/又はその誘導体
あるペント−ス、蔗糖及び/又はデンプン10〜80重
量部、D.水50〜200重量部、 以上A.B.C.及びD.の4成分を主成分とするもの
であり、その粘度が500〜100,000mPa・s/60℃であ
ることを特徴とする水溶性接着剤。
(57) [Claims] [Claim 1] A. 100 parts by weight of gelatin and / or glue; Glycerin 30 to 80 parts by weight, C.I. Polyhydric alcohol and / or its derivative which is solid at room temperature or has high viscosity
C. certain pentoses, 10 to 80 parts by weight of sucrose and / or starch ; 50 to 200 parts by weight of water; B. C. And D. A water-soluble adhesive comprising four components as main components and having a viscosity of 500 to 100,000 mPa · s / 60 ° C.
JP24028693A 1993-09-02 1993-09-02 Water-soluble adhesive Expired - Fee Related JP3502421B2 (en)

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Application Number Priority Date Filing Date Title
JP24028693A JP3502421B2 (en) 1993-09-02 1993-09-02 Water-soluble adhesive

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JPH0770543A JPH0770543A (en) 1995-03-14
JP3502421B2 true JP3502421B2 (en) 2004-03-02

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Country Link
JP (1) JP3502421B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1143663A (en) * 1997-05-27 1999-02-16 Cemedine Co Ltd Liquid adhesive
LU101487B1 (en) * 2019-11-19 2021-05-19 Sestec Polska Sp Z O O Binding agent for cellulose containing materials and the product containing it
CN111704889A (en) * 2020-07-01 2020-09-25 顶立新材料科技有限公司 Long-open-time animal protein glue and preparation method thereof

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