JP2672957B2 - Sheet adhesive - Google Patents
Sheet adhesiveInfo
- Publication number
- JP2672957B2 JP2672957B2 JP63017455A JP1745588A JP2672957B2 JP 2672957 B2 JP2672957 B2 JP 2672957B2 JP 63017455 A JP63017455 A JP 63017455A JP 1745588 A JP1745588 A JP 1745588A JP 2672957 B2 JP2672957 B2 JP 2672957B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- thermoplastic resin
- sheet
- resin adhesive
- curable resin
- 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 - Lifetime
Links
Landscapes
- Adhesive Tapes (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、熱可塑性樹脂接着剤と硬化型接着剤の両接
着特性を有する接着剤に関連する。さらに詳しくは接着
工程を簡素化、高速化でき、充分なる接着性能を発現し
うる新規な接着剤に関するものであり、特に木材等多孔
質の被着体の接着剤として優れた接着剤である。Description: TECHNICAL FIELD The present invention relates to an adhesive having both adhesive properties of a thermoplastic resin adhesive and a curable adhesive. More specifically, the present invention relates to a novel adhesive capable of simplifying and speeding up the adhesive process and exhibiting sufficient adhesive performance, and is particularly excellent as an adhesive for a porous adherend such as wood.
接着剤は硬化性樹脂接着剤と熱可塑性樹脂接着剤に大
別できる。The adhesive can be roughly classified into a curable resin adhesive and a thermoplastic resin adhesive.
硬化性樹脂接着剤とは、常温で液状であり加熱下又は
常温において硬化剤の存在下または存在なしに硬化し接
着力を発現する接着剤である。多くの種類が存在し、代
表的な接着剤として、熱硬化性樹脂接着剤が挙げられ
る。熱硬化性樹脂接着剤は、十分に硬化すれば耐熱性、
耐水性そして十分な接着強度が期待できる。しかし被着
体が多孔質である場合、被着体内部への接着剤の過浸透
防止のため 数種類の増量剤、充填剤等の添加が不可欠
であり糊液の調整、管理が繁雑である。その上、初期接
着力が低いために接着作業は、硬化終了まで圧締が要求
され、硬化の極早いタイプを除けば比較的長い熱圧締時
間が必要という欠点を有する。その結果、接着工程が繁
雑となり接着工程の連続化が非常に困難になっており、
接着工程の簡素化が望まれている。The curable resin adhesive is an adhesive that is liquid at room temperature and cures under heating or at room temperature in the presence or absence of a curing agent to exhibit adhesive strength. There are many types, and a typical adhesive is a thermosetting resin adhesive. Thermosetting resin adhesives have heat resistance if cured sufficiently,
Water resistance and sufficient adhesive strength can be expected. However, when the adherend is porous, it is necessary to add several kinds of fillers and fillers to prevent the adhesive from permeating into the adherend, and the adjustment and management of the paste solution are complicated. In addition, since the initial adhesive strength is low, the bonding work has a drawback that pressing is required until the curing is completed, and a relatively long heat pressing time is required except for a very fast curing type. As a result, the bonding process becomes complicated and it is very difficult to continue the bonding process.
It is desired to simplify the bonding process.
初期接着力の低いことや硬化に比較的長い時間を要す
ること、そして場合によっては過浸透防止の為の処理を
しなければならないことは、硬化性樹脂接着剤一般に共
通する欠点であり、その改良が強く望まれていた。Low initial adhesive strength, relatively long curing time, and in some cases, treatment to prevent over-penetration are common drawbacks of curable resin adhesives. Was strongly desired.
一方、熱可塑性樹脂接着剤は、初期接着力の大きなこ
とが最大の特徴である。熱可塑性樹脂接着剤は、一般
に、エチレン−酢酸ビニル系、ナイロン系、ポリエステ
ル系、ポリビニルアルコール系等からなり、接着後の冷
却硬化により瞬時的に接着力が得られるために一般に機
械化、省力化に適した優れた作業性を有するとともに優
れた保存性を有する。しかしながら熱可塑性樹脂接着剤
は、常態強度は、優れているものの耐熱性、耐クリープ
性に劣るという欠点を有する。たとえば、合板を通常の
熱可塑性樹脂接着剤だけで接着した場合JASの２類合板
に合格せず、合板用としては使用に耐えない。On the other hand, the greatest feature of the thermoplastic resin adhesive is that it has a large initial adhesive force. Thermoplastic resin adhesives are generally made of ethylene-vinyl acetate, nylon, polyester, polyvinyl alcohol, etc., and are generally mechanized and labor-saving because adhesive strength can be obtained instantaneously by cooling and curing after bonding. It has suitable workability and excellent storability. However, the thermoplastic resin adhesive has a drawback that it is excellent in normal state strength but inferior in heat resistance and creep resistance. For example, when the plywood is bonded only with the usual thermoplastic resin adhesive, it does not pass the JAS type 2 plywood and cannot be used for plywood.
言換えれば、硬化性樹脂接着剤と熱可塑性樹脂接着剤
シートを組合せて用いれば、硬化性樹脂接着剤の初期接
着力が低いことや硬化に比較的長い時間を有するという
欠点を解決できる。つまり硬化性樹脂接着剤を、熱可塑
性樹脂接着剤シートの共存下で短時間熱圧縮すれば冷却
と同時に優れた初期接着力が熱可塑性樹脂接着剤に因っ
て発現し、その後その応力下において硬化性樹脂が硬化
するため圧縮時間が短いにもかかわらず硬化性樹脂接着
剤は十分に硬化する。In other words, by using the curable resin adhesive and the thermoplastic resin adhesive sheet in combination, it is possible to solve the drawbacks that the initial adhesive strength of the curable resin adhesive is low and the curing takes a relatively long time. That is, if the curable resin adhesive is heat-compressed for a short time in the coexistence of the thermoplastic resin adhesive sheet, an excellent initial adhesive force is developed simultaneously with the cooling due to the thermoplastic resin adhesive, and then under the stress. Since the curable resin is cured, the curable resin adhesive is sufficiently cured even though the compression time is short.
しかし単に、両者を組合せるべく熱可塑性樹脂接着剤
シートに硬化性樹脂接着剤を塗布することは、困難であ
る。粘度、表面張力等の制限があり平滑な表面の両面に
均一に塗ることは難しく、また塗布量も制限される。However, it is difficult to simply apply the curable resin adhesive to the thermoplastic resin adhesive sheet so as to combine the two. It is difficult to evenly coat both surfaces of a smooth surface due to limitations such as viscosity and surface tension, and the coating amount is also limited.
そこで特開昭61−31483には、あらかじめイソシアネ
ート系化合物からなるプライマーを木材表面に塗布乾燥
した後、シート状ホットメルト型接着剤を用いる方法が
記載されているが、作業が繁雑である。特公昭59−4202
8にはイソシアネート系物質を含むシート状ホットメル
ト型接着剤が開示されているが、あらかじめそのような
シート状ホットメルト型接着剤を調製しなければならな
い。そしてアミノ系樹脂等には、応用不可能である。Therefore, JP-A-61-31483 describes a method in which a primer made of an isocyanate compound is applied to the surface of wood in advance and dried, and then a sheet-shaped hot-melt adhesive is used, but the work is complicated. Japanese Examined Japanese Patent Publication 59-4202
Although a sheet-like hot melt adhesive containing an isocyanate-based substance is disclosed in 8 above, such a sheet hot-melt adhesive must be prepared in advance. And it cannot be applied to amino resins.
このように一般的にホットメルト型接着剤と硬化性樹
脂を組み合わせて使用することは極めて困難であった。
本発明の目的はシート状熱可塑性樹脂と硬化性樹脂を組
合せた接着剤を提供することである。As described above, it is generally extremely difficult to use the hot-melt adhesive and the curable resin in combination.
An object of the present invention is to provide an adhesive that combines a sheet-shaped thermoplastic resin and a curable resin.
本発明者らは、従来の接着剤のこのような欠点を改良
すべく熱可塑性樹脂接着剤シートと硬化性樹脂接着剤を
組合せる方法について鋭意検討の結果、熱可塑性樹脂接
着剤シートが網状もしくは多孔質若しくは不織布状のよ
うに内部に多数の小さな空間を有する形体であれば、一
定量の硬化性樹脂接着剤をそれが低粘度であっても容易
に熱可塑性樹脂接着剤シートの内部に、担持できること
を見出し本発明を完成した。The present inventors have earnestly studied about a method of combining a thermoplastic resin adhesive sheet and a curable resin adhesive in order to improve such drawbacks of conventional adhesives, and as a result, the thermoplastic resin adhesive sheet has a mesh-like or If it is a form having a large number of small spaces inside such as a porous or non-woven fabric, a certain amount of curable resin adhesive can be easily put inside the thermoplastic resin adhesive sheet even if it has low viscosity. The present invention has been completed by finding that it can be carried.
すなわち、本発明は、内部に空間を有する熱可塑性樹
脂接着剤シート状物に液状の硬化型接着剤を担持させた
事を特徴とするシート状接着剤である。That is, the present invention is a sheet adhesive characterized in that a liquid curable adhesive is carried on a thermoplastic resin adhesive sheet having a space inside.
本発明の内部に空間を有する熱可塑性樹脂接着剤シー
ト状物とは、熱可塑性樹脂接着剤シートの表面より裏面
へ硬化性樹脂が容易に移動できるような空隙が存在する
ような形体であればよく、網状、多孔質状、不織布状、
布状、綿状等を例示でき、さらに類似の形態も含まれ
る。そして、それらの二つ以上からなる積層物も含まれ
る。要は、その内部に硬化性樹脂を担持できる形態であ
ればよい。その組成は、特に制限されない。エチレン−
酢酸ビニル（EVA）系、ポリエチレン系、アタクチック
ポリプロピレン系、エチレン−アクリル酸エチルコポリ
マー系、ポリアミド系、ポリエステル系、ポリカーボネ
ート系、ポリビニルエーテル系、ポリビニルアルコール
系、ポリウレタン系、セルロース系等の熱可塑性樹脂の
単独またはこれらの可能な混合又は共重合物等そしてそ
れらの変性物等を例示できる。さらに該樹脂をベースポ
リマーとしてロジン、ピネン系誘導体等の粘着付与剤、
パラフィンワックス、マイクロクリスタリンワックス等
のワックス、安定剤、可塑剤、酸化防止剤等を混合した
ものも可能である。The thermoplastic resin adhesive sheet material having a space in the present invention is a form in which there are voids so that the curable resin can easily move from the front surface to the back surface of the thermoplastic resin adhesive sheet. Well, mesh, porous, non-woven,
A cloth shape, a cotton shape, etc. can be exemplified, and a similar shape is also included. Further, a laminate including two or more of them is also included. What is essential is that the curable resin can be supported inside. The composition is not particularly limited. Ethylene-
Thermoplastic resins such as vinyl acetate (EVA), polyethylene, atactic polypropylene, ethylene-ethyl acrylate copolymer, polyamide, polyester, polycarbonate, polyvinyl ether, polyvinyl alcohol, polyurethane, cellulose Examples of the homopolymers, their possible mixtures or copolymers, and their modified products. Further, using the resin as a base polymer, a tackifier such as rosin or a pinene derivative,
A mixture of wax such as paraffin wax and microcrystalline wax, stabilizer, plasticizer, antioxidant and the like is also possible.
熱可塑性樹脂接着剤シート状物の融点は、80〜180℃
の範囲が望ましい。80℃未満では、接着性能の低いワッ
クスの添加濃度を上げねばならず十分な接着強度が得ら
れない。180℃を越えると熱圧に多くのエネルギーを必
要とし、コスト的に不利である。熱可塑性樹脂接着剤の
坪量は、５〜350g/m2が望ましい。好ましくは、20〜70g
/m2である。5g/m2未満では、十分な接着強度が得られ
ず、かつ熱可塑性樹脂接着剤シート自体の強度が低いた
め、破れやすく取扱いにくい欠点がある。350g/m2を越
えると加熱圧締の時に接着面より横に硬化性樹脂と共に
押出されてしまい接着に寄与しない。The melting point of the thermoplastic resin adhesive sheet is 80 to 180 ° C.
Is desirable. If the temperature is lower than 80 ° C., it is necessary to increase the concentration of the wax having a low adhesive property, and sufficient adhesive strength cannot be obtained. If the temperature exceeds 180 ° C., much energy is required for heat pressure, which is disadvantageous in cost. The basis weight of the thermoplastic resin adhesive is preferably from 5 to 350 g / m 2 . Preferably 20-70g
a / m 2. If it is less than 5 g / m 2 , sufficient adhesive strength cannot be obtained, and the strength of the thermoplastic resin adhesive sheet itself is low. If it exceeds 350 g / m 2 , it will be extruded along with the curable resin laterally from the bonding surface during heating and pressing and will not contribute to bonding.
本発明の硬化性樹脂とは、熱可塑性樹脂接着剤シート
の融点よりも低い温度で硬化が可能で、熱可塑性樹脂接
着剤シートを侵さないものである。粘度は、特に制限さ
れない。にかわ、小麦粉等の蛋白質系天然高分子接着
剤、デンプン等の炭水化物系天然高分子接着剤、メラミ
ン系、尿素系、フェノール系、レゾルシノール系、キシ
レン系、フラン系、エポキシ系、ポリイソシアネート
系、不飽和ポリエステル系、熱硬化性アクリル樹脂系、
等の熱硬化性樹脂接着剤、シアノアクリレート系接着
剤、スチレンブタジエン系、アクリロニトリルブタジエ
ン系、メチルメタクリレートブタジエン系等の合成ゴム
ラテックスエマルジョン接着剤、ポリ酢酸ビニルエマル
ジョン接着剤、ポリ塩化ビニルエマルジョン接着剤等の
単独または可能な混合物、共縮合物等を例示できる。こ
れらの樹脂に硬化剤、増量剤、充てん剤等を加えた接着
剤組成物も可能である。硬化性樹脂接着剤は、要求され
る耐水性によって使い分けることができる。例えば、硬
化型接着剤としてイソシアネート系の熱硬化性接着剤を
選べば特に優れた接着力、耐水性を示し、JASの特類合
成に合格することができる。The curable resin of the present invention is a resin that can be cured at a temperature lower than the melting point of the thermoplastic resin adhesive sheet and does not damage the thermoplastic resin adhesive sheet. The viscosity is not particularly limited. Glue, protein-based natural polymer adhesive such as wheat flour, carbohydrate-based natural polymer adhesive such as starch, melamine-based, urea-based, phenol-based, resorcinol-based, xylene-based, furan-based, epoxy-based, polyisocyanate-based, non-adhesive Saturated polyester type, thermosetting acrylic resin type,
Thermosetting resin adhesives, cyanoacrylate adhesives, styrene butadiene adhesives, acrylonitrile butadiene adhesives, methyl methacrylate butadiene adhesives, etc., latex adhesives, polyvinyl acetate emulsion adhesives, polyvinyl chloride emulsion adhesives, etc. Examples thereof include single or possible mixtures, co-condensates and the like. An adhesive composition in which a curing agent, a filler, a filler and the like are added to these resins is also possible. The curable resin adhesive can be used properly depending on the required water resistance. For example, if an isocyanate thermosetting adhesive is selected as the curable adhesive, it exhibits particularly excellent adhesive strength and water resistance and can pass the JAS special synthesis.
熱可塑性樹脂接着剤に担持させる硬化性接着剤量は、
５〜250g/m2が望ましい。5g/m2未満では、十分な接着硬
度が得られず、250g/m2を越えると長い熱圧締時間を必
要とする。これらの硬化性樹脂接着剤に、充填剤等の添
加剤を加えることは、何ら差し支えない。The amount of curable adhesive loaded on the thermoplastic resin adhesive is
5-250 g / m 2 is desirable. If it is less than 5 g / m 2 , sufficient adhesive hardness cannot be obtained, and if it exceeds 250 g / m 2 , a long heat pressing time is required. It is no problem to add additives such as fillers to these curable resin adhesives.
硬化性樹脂接着剤を熱可塑性樹脂接着剤シートへ担持
させるのは、使用直前でも構わない。硬化性樹脂接着剤
を熱可塑性樹脂接着剤シートに担持させる方法は、熱可
塑性樹脂接着剤シートを硬化性樹脂液へ浸漬、熱可塑性
樹脂接着剤シートに硬化性樹脂液を塗布、噴霧などの方
法を採用できる。さらにロール圧締により絞ることで適
量とすると共に均一にすることができる。更に硬化性樹
脂接着剤をマイクロカプセル化して用いることもでき
る。The curable resin adhesive may be carried on the thermoplastic resin adhesive sheet immediately before use. The method of supporting the curable resin adhesive on the thermoplastic resin adhesive sheet includes a method of dipping the thermoplastic resin adhesive sheet in the curable resin liquid, applying the curable resin liquid to the thermoplastic resin adhesive sheet, and spraying. Can be adopted. Further, by squeezing by roll pressing, it is possible to make an appropriate amount and make it uniform. Further, the curable resin adhesive can be used in the form of microcapsules.
加熱圧締の方法は、従来のプレスによるバッチ法、ロ
ールプレスによる連続法、高周波過熱など任意の方法が
採用される。加熱温度は、熱可塑性樹脂接着剤の融点程
度が望ましい。圧締圧力は、１〜100Kg/cm2、好ましく
は５〜500Kg/cm2である。圧締時間は、すくなくともす
べての接着層の熱可塑性樹脂が溶融状態となるまでの時
間が必要である。As a method of heating and pressing, any method such as a conventional batch method using a press, a continuous method using a roll press, and high-frequency heating is used. The heating temperature is desirably about the melting point of the thermoplastic resin adhesive. The clamping pressure is 1 to 100 Kg / cm 2 , preferably 5 to 500 Kg / cm 2 . The pressing time needs at least a time until the thermoplastic resins of all the adhesive layers are in a molten state.
以下に、実施例で本発明を詳細に説明するが、本発明
は、これに限定されない。Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited thereto.
熱可塑性樹脂接着剤シート状物としてホットメルト接
着剤（三井東圧化学株式会社製ノイネッツ）を使用し
た。組成等を第１表に示す。A hot melt adhesive (Munei Toatsu Chemicals Neunets) was used as the thermoplastic resin adhesive sheet. The composition and the like are shown in Table 1.
硬化性樹脂接着剤としてイソシアネート系接着剤（三
井東圧化学株式会社製UR−4000）とメラミンフェノール
樹脂接着剤（三井東圧化学株式会社製UL−811）を用い
た。UL−811は、硬化剤として塩化アンモニウムを１部
加え、使用した。An isocyanate adhesive (UR-4000 manufactured by Mitsui Toatsu Chemicals, Inc.) and a melamine phenol resin adhesive (UL-811 manufactured by Mitsui Toatsu Chemicals, Inc.) were used as curable resin adhesives. UL-811 was used after adding 1 part of ammonium chloride as a curing agent.
接着の操作は、まずポリエステルフイルム上に熱可塑
性樹脂シート状物を乗せ上から硬化性樹脂接着剤を上か
ら適量を垂らし、続いてローラーにて十分に延ばし均一
に担持させて、シート状接着剤となして被着材間にはさ
み、次いで熱圧締を行った。Adhesion is carried out by first placing a thermoplastic resin sheet on the polyester film and dropping an appropriate amount of the curable resin adhesive from the top, then spreading it sufficiently with a roller and allowing it to be evenly supported, and then applying the sheet adhesive. However, it was sandwiched between the adherends, and then hot pressing was performed.
合板の製造は次のようにして行った。 The plywood was manufactured as follows.
ラワンの1.6mmの単板を用いて3ply合板を作成しJAS普
通合板規格に基づいて接着強度を測定した。接着条件及
び結果を第２、３表に示す。3ply plywood was prepared using 1.6 mm lauan veneer and the adhesive strength was measured based on JAS standard plywood standard. The adhesion conditions and results are shown in Tables 2 and 3.
〔発明の効果〕 本発明の接着方法により、以下のような接着が可能に
なる。 [Advantages of the Invention] With the bonding method of the present invention, the following bonding is possible.
広い温度、湿度で有効な接着強度つまり従来の熱可塑
性樹脂接着剤に比べはるかに接着強度が向上する。Effective adhesive strength over a wide range of temperature and humidity, that is, the adhesive strength is much improved as compared with conventional thermoplastic resin adhesives.
プレス時間の短縮。Reduction of press time.
多孔質の被着体に対しても低粘度の硬化性樹脂を使用
できる。A low-viscosity curable resin can be used even for a porous adherend.
Claims (1)
ート状物に液状の硬化性接着剤を担持させたシート状接
着剤であって、該熱可塑性樹脂が融点80〜180℃であ
り、かつ、熱収縮性を有さないことを特徴とするシート
状接着剤。1. A sheet adhesive comprising a thermoplastic resin adhesive sheet having voids inside and carrying a liquid curable adhesive, wherein the thermoplastic resin has a melting point of 80 to 180 ° C. Moreover, a sheet-like adhesive having no heat shrinkability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017455A JP2672957B2 (en) | 1988-01-29 | 1988-01-29 | Sheet adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63017455A JP2672957B2 (en) | 1988-01-29 | 1988-01-29 | Sheet adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01193386A JPH01193386A (en) | 1989-08-03 |
| JP2672957B2 true JP2672957B2 (en) | 1997-11-05 |
Family
ID=11944497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63017455A Expired - Lifetime JP2672957B2 (en) | 1988-01-29 | 1988-01-29 | Sheet adhesive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2672957B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2463065B (en) * | 2008-09-01 | 2012-11-07 | Loctite R & D Ltd | Transferable curable non-liquid film on a release substrate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62290784A (en) * | 1986-06-09 | 1987-12-17 | Nitto Electric Ind Co Ltd | Adhesive in ring form |
-
1988
- 1988-01-29 JP JP63017455A patent/JP2672957B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| ▲桧▼垣寅雄編「接着性ポリマー」昭和５５年１０月２７日（株）シーエムシー発行 Ｐ．１７ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01193386A (en) | 1989-08-03 |
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