JPH0867859A - Heat-shrinkable adhesive tape - Google Patents
Heat-shrinkable adhesive tapeInfo
- Publication number
- JPH0867859A JPH0867859A JP6225953A JP22595394A JPH0867859A JP H0867859 A JPH0867859 A JP H0867859A JP 6225953 A JP6225953 A JP 6225953A JP 22595394 A JP22595394 A JP 22595394A JP H0867859 A JPH0867859 A JP H0867859A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- pressure
- sensitive adhesive
- heat
- shrinkable
- 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.)
- Pending
Links
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
(57)【要約】
【目的】テ−プ支持体を熱収縮性とした粘着テ−プにお
いて、粘着剤層に加硫ゴム系粘着剤層を使用しても、段
差箇所によく密着させ得ると共にテ−プ巻き付け端末で
の剥離を充分に防止し得る熱収縮性粘着テ−プを提供す
ることにある。
【構成】熱収縮性テ−プ支持体１の片面に粘着剤層２を
有する粘着テ−プにおいて、テ−プ支持体１と粘着剤層
２との間に粘着剤層２よりも軟らかい中間層３を設け
た。
(57) [Summary] [Purpose] In a pressure-sensitive adhesive tape having a heat-shrinkable tape support, even if a vulcanized rubber-based pressure-sensitive adhesive layer is used as the pressure-sensitive adhesive layer, it can be adhered well to the step portion. Another object of the present invention is to provide a heat-shrinkable pressure-sensitive adhesive tape capable of sufficiently preventing peeling at a tape winding terminal. In a pressure-sensitive adhesive tape having a heat-shrinkable tape support 1 having a pressure-sensitive adhesive layer 2 on one surface, an intermediate layer between the tape support 1 and the pressure-sensitive adhesive layer 2 is softer than the pressure-sensitive adhesive layer 2. Layer 3 was provided.
Description
【０００１】[0001]
【産業上の利用分野】本発明は配管接続部等の防食処理
に使用する熱収縮性粘着テ−プに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-shrinkable pressure-sensitive adhesive tape used for anticorrosion treatment of pipe connection parts and the like.
【０００２】[0002]
【従来の技術】テ−プ支持体の片面に粘着剤層を設けた
片面粘着テ−プにおいては、防食処理を必要とする箇
所、例えば、石油、ガス、電気、水道或いは化学薬品等
の配管の接続部に巻き付けて使用することがあり、特
に、テ−プ支持体を熱収縮性としたものにおいては、テ
−プ支持体の熱収縮力による粘着剤層の圧縮のために一
層に優れた水密性が期待でき、有利である。この熱収縮
性粘着テ−プにおいては、熱収縮性テ−プ支持体の片面
にホットメルト系接着剤層を設けたホットメルト系のも
のに較べ、接着成形温度、耐水性の点で有利であり、ま
た、接着力のムラも少ないといった利点もある。2. Description of the Related Art In a single-sided adhesive tape having a pressure-sensitive adhesive layer on one side of a tape support, a portion requiring anticorrosion treatment, for example, piping for oil, gas, electricity, water or chemicals, etc. It may be used by wrapping around the connection part of the tape. Especially, in the case where the tape support is heat-shrinkable, it is more excellent because the pressure-sensitive adhesive layer is compressed by the heat shrinkage force of the tape support. Watertightness can be expected, which is advantageous. This heat-shrinkable pressure-sensitive adhesive tape is advantageous in terms of adhesive molding temperature and water resistance as compared with a hot-melt type adhesive tape in which a hot-melt adhesive layer is provided on one surface of the heat-shrinkable tape support. There is also an advantage that the adhesive strength is less uneven.
【０００３】かかる熱収縮性粘着テ−プ中、粘着剤層に
加硫ゴム系粘着剤を使用したものにおいては、軟らかい
ゴム系粘着剤（マスチック系）を使用したものに較べ、
例えば、上記配管が地中埋設配管である場合でも、その
加硫ゴム系粘着剤層の弾性のために、土圧を効果的に緩
和でき、粘着剤層と被防食面との界面の破壊を防止し
得、安定な水密性を保証できる。また、加硫ゴム系粘着
剤層の熱的安定性のために、高温下でも優れた水密性を
保証できる。Among such heat-shrinkable pressure-sensitive adhesive tapes, the one using a vulcanized rubber-based pressure-sensitive adhesive in the pressure-sensitive adhesive layer is superior to the one using a soft rubber-based pressure-sensitive adhesive (mastic type).
For example, even when the pipe is a buried underground pipe, due to the elasticity of the vulcanized rubber-based pressure-sensitive adhesive layer, the earth pressure can be effectively relieved, and the interface between the pressure-sensitive adhesive layer and the corrosion-protected surface is not destroyed. It can prevent and can guarantee stable watertightness. Further, due to the thermal stability of the vulcanized rubber-based pressure-sensitive adhesive layer, excellent watertightness can be guaranteed even at high temperatures.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
加硫ゴム系熱収縮性粘着テ−プにおいては、マスチック
系熱収縮性粘着テ−プに較べ、段差箇所への密着被覆が
困難である。その原因としては、段差箇所に巻き付けた
熱収縮性粘着テ−プをその段差面に密着させるには、テ
−プ支持体の収縮に伴い粘着剤層を撓ませ、その粘着剤
層を段差面に圧接させることが必要であるが、上記の加
硫ゴム系熱収縮性粘着テ−プにおいては、撓み剛性が大
であり、テ−プ支持体の収縮力で粘着剤層を撓ませるこ
とが容易ではないためと推定される。而して、かかるも
とでは、段差箇所での結露等による早期腐食が懸念され
る。However, in the above vulcanized rubber-based heat-shrinkable adhesive tape, it is more difficult to cover the stepped portion by adhesion as compared with the mastic-based heat-shrinkable adhesive tape. The reason for this is that in order to bring the heat-shrinkable adhesive tape wound around the step portion into close contact with the step surface, the adhesive layer is bent as the tape support contracts, and the adhesive layer is moved to the step surface. However, in the above vulcanized rubber-based heat-shrinkable adhesive tape, the flexural rigidity is large, and the adhesive layer may be flexed by the shrinking force of the tape support. It is estimated that it is not easy. Therefore, under such circumstances, there is concern about early corrosion due to dew condensation or the like at the step portion.
【０００５】また、上記の加硫ゴム系熱収縮性粘着テ−
プにおいては、マスチック系熱収縮性粘着テ−プに較
べ、被処理箇所に巻き付けたのち、加熱し、更に冷却さ
せる際、テ−プ巻き付け端末の粘着剤層と被処理面との
界面にテ−プ支持体の収縮力が伝達され、その伝達力が
その界面での粘着剤層の粘着力（剪断強度）よりも大と
って、テ−プ端末での剥離が発生し易い。The vulcanized rubber-based heat-shrinkable adhesive tape
In comparison with the mastic heat-shrinkable adhesive tape, the tape is wound around the area to be treated, then heated and further cooled, and at the interface between the adhesive layer of the tape winding terminal and the surface to be treated. -The contracting force of the tape support is transmitted, and the transmitting force is larger than the adhesive force (shear strength) of the adhesive layer at the interface, so that peeling at the tape terminal is likely to occur.
【０００６】本発明の目的は、テ−プ支持体を熱収縮性
とした粘着テ−プにおいて、粘着剤層に加硫ゴム系粘着
剤層を使用しても、段差箇所によく密着させ得ると共に
テ−プ巻き付け端末での剥離を充分に防止し得る熱収縮
性粘着テ−プを提供することにある。An object of the present invention is to provide a pressure-sensitive adhesive tape having a heat-shrinkable tape support, which can be adhered well to a step portion even if a vulcanized rubber-based pressure-sensitive adhesive layer is used as the pressure-sensitive adhesive layer. Another object of the present invention is to provide a heat-shrinkable pressure-sensitive adhesive tape capable of sufficiently preventing peeling at a tape winding terminal.
【０００７】[0007]
【課題を解決するための手段】本発明に係る熱収縮性粘
着テ−プは、図１に示すように、熱収縮性テ−プ支持体
１の片面に粘着剤層２を有する粘着テ−プにおいて、テ
−プ支持体１と粘着剤層２との間に粘着剤層２よりも軟
らかい中間層３を設けたことを特徴とする構成である。As shown in FIG. 1, a heat-shrinkable pressure-sensitive adhesive tape according to the present invention comprises a heat-shrinkable tape support 1 having a pressure-sensitive adhesive layer 2 on one side thereof. In the tape, an intermediate layer 3 that is softer than the pressure-sensitive adhesive layer 2 is provided between the tape support 1 and the pressure-sensitive adhesive layer 2.
【０００８】この中間層３には、熱収縮性テ−プ支持体
１が収縮する間、テ−プ支持体１並びに粘着剤層２に較
べ、一段と低弾性率の状態を保持し得るものが使用され
る。通常、上記熱収縮性テ−プ支持体１には、厚み５０
０〜１５００μｍの熱収縮性ポリエチレンテ−プや熱収
縮性ポリプロピレンテ−プ等が、上記粘着剤層２には厚
み３００〜１５００μｍの加硫ゴム系粘着剤層がそれぞ
れ使用され、中間層３には、フロ−テスタ−による８０
℃での粘度が８×１０5ポイズ以下、好ましくは５×１
０5ポイズ以下で、厚みが０．０８ｍｍ〜２．０ｍｍ、
好ましくは０．１ｍｍ〜１．５ｍｍのタッキファイア添
加の熱可塑性樹脂が使用される。The intermediate layer 3 is capable of holding a state of a much lower elastic modulus than the tape support 1 and the adhesive layer 2 while the heat-shrinkable tape support 1 shrinks. used. Usually, the heat-shrinkable tape support 1 has a thickness of 50
A heat-shrinkable polyethylene tape or heat-shrinkable polypropylene tape having a thickness of 0 to 1500 μm is used, and a vulcanized rubber-based pressure-sensitive adhesive layer having a thickness of 300 to 1500 μm is used as the pressure-sensitive adhesive layer 2, and the intermediate layer 3 is used. Is 80 according to the flow tester
Viscosity at ℃ is 8 × 10 5 poise or less, preferably 5 × 1
0 5 poise or less, a thickness of 0.08mm~2.0mm,
A thermoplastic resin with a tackifier of 0.1 mm to 1.5 mm is preferably used.
【０００９】[0009]
【作用】図２は本発明に係る粘着テ−プを段差のある被
処理箇所に巻き付けたのち、加熱し、更に冷却していく
過程での状態を示す説明図である。上記熱収縮性テ−プ
支持体には、加熱による再結晶化による収縮、加熱によ
る残留引張り応力の解除並びに冷却による収縮が生じる
から、図２において、加熱、並びに冷却過程中、テ−プ
支持体の長さ方向に引張り力ｆが発生し、この引張り力
ｆのために粘着剤層内面ａを段差面ｂに接触させようと
する半径方向分力ｐが作用している。FIG. 2 is an explanatory view showing a state in which the adhesive tape according to the present invention is wound around a to-be-processed portion having a step, heated, and further cooled. Since the heat-shrinkable tape support undergoes shrinkage due to recrystallization due to heating, release of residual tensile stress due to heating, and shrinkage due to cooling, the tape support during heating and cooling in FIG. A tensile force f is generated in the lengthwise direction of the body, and the tensile force f acts a radial component force p for bringing the pressure-sensitive adhesive layer inner surface a into contact with the step surface b.
【００１０】図２において、粘着剤層内面ａの段差面ｂ
への接触は、その段差面に臨む粘着テ−プ部分の撓みに
依存し（図２において、点線は撓み前を示している）、
粘着テ−プの撓み剛性が小であるほど、その撓みを容易
に発生させ得、粘着剤層内面を段差面に強く密着させる
ことが可能となる。In FIG. 2, the step surface b of the inner surface a of the adhesive layer
Contact with the step depends on the bending of the adhesive tape portion facing the step surface (in FIG. 2, the dotted line shows before the bending),
The smaller the flexural rigidity of the adhesive tape, the more easily it can be flexed, and the inner surface of the adhesive layer can be strongly adhered to the step surface.
【００１１】而るに、本発明の熱収縮性粘着テ−プにお
いては、テ−プ支持体と粘着剤層との間に、両者よりも
軟らかい（低弾性率）中間層を介在させてあり、テ−プ
支持体が収縮しても、中間層が低応力のもとでその収縮
に追従してせんだん変形（すべり変形）し、テ−プ支持
体を粘着剤層から力学的に充分に独立させることができ
る。従って、本発明の粘着テ−プの撓み剛性は、テ−プ
支持体の撓み剛性と粘着剤層の撓み剛性との単純な和と
なり、この撓み剛性を著しく低くできるから（例えば、
テ−プ支持体のヤング率並びに粘着剤層のヤング率が等
しいと仮定し、テ−プ支持体の厚みをｔ1、粘着剤層の
厚みをｔ2とした場合、両者が力学的に独立であるとき
の撓み剛性Ｉ1と力学的に一体であるときの撓み剛性Ｉ2
との比Ｉ1／Ｉ2＝（ｔ1 3＋ｔ2 3）／（ｔ1＋ｔ2）3とな
り、例えば、ｔ1＝ｔ2の場合、Ｉ1／Ｉ2＝１／４とな
る）、粘着剤層内面の段差面への密着をよく達成でき
る。In the heat-shrinkable pressure-sensitive adhesive tape of the present invention, however, an intermediate layer softer (lower elastic modulus) than both is interposed between the tape support and the pressure-sensitive adhesive layer. Even when the tape support contracts, the intermediate layer follows the contraction under low stress and deforms (slip), and the tape support is mechanically sufficiently removed from the adhesive layer. Can be independent. Therefore, the flexural rigidity of the adhesive tape of the present invention is a simple sum of the flexural rigidity of the tape support and the flexural rigidity of the adhesive layer, and this flexural rigidity can be significantly reduced (for example,
Assuming that the Young's modulus of the tape support and the Young's modulus of the pressure-sensitive adhesive layer are equal, and the thickness of the tape support is t 1 and the thickness of the pressure-sensitive adhesive layer is t 2 , they are mechanically independent. flexural rigidity I 1 and mechanically flexural rigidity I 2 when an integral of time is
And the ratio I 1 / I 2 = (t 1 3 + t 2 3 ) / (t 1 + t 2 ) 3 and , for example, when t 1 = t 2 , I 1 / I 2 = 1/4), Adhesion to the step surface on the inner surface of the pressure-sensitive adhesive layer can be achieved well.
【００１２】図３はテ−プ巻き付けに端末における上記
加熱、冷却中での状態を示す説明図であり、熱収縮性テ
−プ支持体１と粘着剤層２との間にすべりが生じない場
合、粘着剤層に熱収縮性テ−プ支持体の収縮力ｆと同じ
大きさ剪断応力が作用するが、本発明の熱収縮性粘着テ
−プにおいては、中間層３にすべりが生じて、粘着剤層
に作用する剪断応力τが緩和されるから、粘着剤層３と
被処理面４との界面に作用する剪断応力を小さくでき、
その剪断応力を被処理面に対する粘着剤層の粘着強度以
下にできるから、テ−プ巻き付けに端末での剥離を確実
に防止できる。FIG. 3 is an explanatory view showing a state during the above heating and cooling at the terminal during tape winding, in which no slip occurs between the heat-shrinkable tape support 1 and the pressure-sensitive adhesive layer 2. In this case, a shear stress having the same magnitude as the shrinking force f of the heat-shrinkable tape support acts on the pressure-sensitive adhesive layer, but in the heat-shrinkable pressure-sensitive adhesive tape of the present invention, slippage occurs in the intermediate layer 3. Since the shear stress τ acting on the pressure-sensitive adhesive layer is relaxed, the shear stress acting on the interface between the pressure-sensitive adhesive layer 3 and the surface 4 to be treated can be reduced,
Since the shear stress can be set to be equal to or lower than the adhesive strength of the pressure-sensitive adhesive layer with respect to the surface to be treated, peeling at the end can be reliably prevented during tape winding.
【００１３】この場合、中間層２の粘度を低くする程、
また中間層２の厚みを厚くするほど中間層２のすべり量
を大きくでき、上記剪断応力の緩和に有利であるが、中
間層２の厚みを厚くし過ぎると、中間層２の占める割合
が大となって、熱収縮性粘着テ−プ全体の耐水性が低下
するので、中間層２の粘度は、フロ−テスタ−による８
０℃での粘度で８×１０5ポイズ以下、好ましくは５×
１０5ポイズ以下とされ、また、厚みは０．０８ｍｍ〜
２．０ｍｍ、好ましくは０．１ｍｍ〜１．５ｍｍとされ
る。In this case, the lower the viscosity of the intermediate layer 2,
Further, as the thickness of the intermediate layer 2 is increased, the slip amount of the intermediate layer 2 can be increased, which is advantageous for relaxing the shear stress. However, if the thickness of the intermediate layer 2 is excessively increased, the ratio occupied by the intermediate layer 2 becomes large. As a result, the water resistance of the heat-shrinkable adhesive tape as a whole decreases, so that the viscosity of the intermediate layer 2 is 8 depending on the flow tester.
Viscosity at 0 ° C. is 8 × 10 5 poise or less, preferably 5 ×
10 5 poise or less, and the thickness is 0.08 mm ~
It is set to 2.0 mm, preferably 0.1 mm to 1.5 mm.
【００１４】[0014]
【実施例】以下の実施例並びに比較例において、熱収縮
性テ−プ支持体には熱収縮率３０％，厚み１２００μｍ
の熱収縮性ポリエチレンテ−プを、粘着剤層には厚み７
００μｍの加硫ゴム系粘着剤を使用した。EXAMPLES In the following examples and comparative examples, the heat-shrinkable tape support has a heat-shrinkage rate of 30% and a thickness of 1200 μm.
Heat-shrinkable polyethylene tape with a thickness of 7
A vulcanized rubber-based adhesive having a thickness of 00 μm was used.
【００１５】〔実施例１〜６〕中間層として、フロ−テ
スタ−（島津製作所製ＣＦＴ−５００）による８０℃で
の粘度が５×１０5ポイズのタッキファイア添加の熱可
塑性樹脂を使用し、厚みは、それぞれの実施例におい
て、０．０８ｍｍ、０．１ｍｍ、０．３ｍｍ、１．２ｍ
ｍ、１．５ｍｍ、２．０ｍｍとした。Examples 1 to 6 As an intermediate layer, a tackifier-added thermoplastic resin having a viscosity of 5 × 10 5 poise at 80 ° C. by a flow tester (CFT-500 manufactured by Shimadzu Corporation) is used, The thickness is 0.08 mm, 0.1 mm, 0.3 mm, 1.2 m in each example.
m, 1.5 mm, and 2.0 mm.
【００１６】〔実施例７〜１２〕中間層として、フロ−
テスタ−（島津製作所製ＣＦＴ−５００）による８０℃
での粘度が８×１０5ポイズのタッキファイア添加の熱
可塑性樹脂を使用し、厚みは、それぞれの実施例におい
て、０．０８ｍｍ、０．１ｍｍ、０．３ｍｍ、１．２ｍ
ｍ、１．５ｍｍ、２．０ｍｍとした。[Examples 7 to 12] As an intermediate layer, a flow
80 ° C by a tester (CFT-500 manufactured by Shimadzu Corporation)
A tackifier-added thermoplastic resin having a viscosity of 8 × 10 5 poise is used, and the thickness is 0.08 mm, 0.1 mm, 0.3 mm, 1.2 m in each example.
m, 1.5 mm, and 2.0 mm.
【００１７】〔比較例〕中間層は使用せず、熱収縮性テ
−プ支持体に粘着剤層を直接設けた。[Comparative Example] An adhesive layer was provided directly on the heat-shrinkable tape support without using the intermediate layer.
【００１８】これらの実施例並びに比較例につき、外面
中央に段差５ｍｍの径大部を有し、径小部の外径が７５
０ｍｍである鋼製マンドレル（ただし、苛酷な条件を模
擬するために、外面を油脂で汚した）に各熱収縮性粘着
テ−プを巻き付け、熱風加熱により巻き付けテ−プをほ
ぼ１８０℃に加熱し、次いで自然冷却させ、その間での
テ−プ端末の状態を観察したところ、比較例品では、テ
−プ端末の剥離が観られたが、いずれの実施例品におい
ても、テ−プ端末の剥離は観られなかった。In these examples and comparative examples, a large diameter portion having a step of 5 mm was formed at the center of the outer surface, and the outer diameter of the small diameter portion was 75.
Wrap each heat-shrinkable adhesive tape around a 0 mm steel mandrel (however, the outer surface was soiled with oil and fat to simulate harsh conditions) and heat the winding tape to approximately 180 ° C by heating with hot air. Then, it was naturally cooled, and when the state of the tape terminal during that time was observed, peeling of the tape terminal was observed in the comparative example product, but in any of the example products, the tape terminal was peeled off. No peeling was observed.
【００１９】この場合、〔実施例１（中間層の粘度５×
１０5ポイズ，厚み０．０８ｍｍ）、実施例６〜８（中
間層の粘度８×１０5ポイズ，厚み０．０８ｍｍ〜０．
３ｍｍ）〕の群＜〔実施例１０、実施例１１（中間層の
粘度８×１０5ポイズ，厚み１．２ｍｍ、１．５ｍ
ｍ）〕の群＜実施例２〜６（中間層の粘度５×１０5ポ
イズ，厚み０．１ｍｍ〜２．０ｍｍ）、実施例１２（中
間層の粘度８×１０5ポイズ，厚み２．０ｍｍ〕の群の
順序で、中間層のすべり量が大であり、後者の群ほど、
応力緩和がより効果的に行われていることが認められ
た。ただし、中間層厚み、２．０ｍｍでは、既述した通
り、耐水性の点から好ましくなく、上記実施例中、テ−
プ端末での剥離応力の緩和に特に有利な範囲は、実施例
２〜５における中間層の粘度５×１０5ポイズ，厚み
０．１ｍｍ〜１．５ｍｍに属する範囲である。In this case, [Example 1 (viscosity of the intermediate layer 5 ×
10 5 poise, the thickness 0.08 mm), viscosity 8 × 10 5 poise Examples 6-8 (intermediate layer thickness 0.08Mm～0.
3 mm)] <[Example 10, Example 11 (viscosity of the intermediate layer is 8 × 10 5 poise, thickness 1.2 mm, 1.5 m)
m)] <Examples 2 to 6 (viscosity of the intermediate layer is 5 × 10 5 poise, thickness 0.1 mm to 2.0 mm), Example 12 (viscosity of the intermediate layer is 8 × 10 5 poise, thickness 2.0 mm) ] In the order of the groups, the slip amount of the intermediate layer is large, and the latter group has
It was confirmed that the stress relaxation was performed more effectively. However, when the thickness of the intermediate layer is 2.0 mm, as described above, it is not preferable from the viewpoint of water resistance.
A particularly advantageous range for relaxing the peeling stress at the end is the range of the viscosity of the intermediate layer in Examples 2 to 5 of 5 × 10 5 poise and the thickness of 0.1 mm to 1.5 mm.
【００２０】上記テ−プ端末の観察後、粘着テ−プ巻き
付け層を解体し、段差面への密着状態を調べたところ、
比較例品で段差面への接着強度が低く容易に剥離できた
が、いずれの実施例品においても、段差面への接着が強
力で素手による剥離は不可であった。この場合も、上記
実施例２〜５においては、中間層の粘度が低く、粘着テ
−プ全体の撓み剛性の低減に有利であり、既述した通
り、それだけ段差面への撓み密着を強固に行うことがで
きる。After observing the tape end, the adhesive tape winding layer was disassembled and the state of adhesion to the step surface was examined.
The comparative product had low adhesive strength to the step surface and could be easily peeled off, but in any of the example products, the adhesion to the step surface was strong and peeling with bare hands was impossible. Also in this case, in Examples 2 to 5, the viscosity of the intermediate layer is low, which is advantageous for reducing the flexural rigidity of the entire adhesive tape, and as described above, the flexural adhesion to the step surface is strengthened accordingly. It can be carried out.
【００２１】[0021]
【発明の効果】本発明によれば、テ−プ支持体を熱収縮
性とする粘着テ−プにおいて、粘着剤層に高温での使用
を可能とするために、加硫ゴム系粘着剤層の如く比較的
硬いものを用いても、段差面によく密着させて巻き付け
得、かつテ−プ巻き付け端末での剥離もよく防止でき。
また、常温粘着性であるために、比較的低い温度（６０
℃程度）でも充分な接着力を保証でき、接着成形温度も
良好であり、粘着剤層の弾性のために接着力のムラをよ
く排除でき、加硫ゴム系粘着剤層の為に耐熱性にも優れ
ている。従って、信頼性のある防食処理が可能となる。According to the present invention, in a pressure-sensitive adhesive tape in which the tape support is heat-shrinkable, a vulcanized rubber-based pressure-sensitive adhesive layer is used so that the pressure-sensitive adhesive layer can be used at high temperature. Even if a relatively hard material is used, it can be wound closely on the step surface, and peeling at the tape winding terminal can be well prevented.
In addition, since the adhesiveness at room temperature is relatively low (60
(About ℃), sufficient adhesive strength can be assured, the adhesive molding temperature is good, unevenness in adhesive strength can be eliminated well due to the elasticity of the adhesive layer, and vulcanized rubber adhesive layer has excellent heat resistance. Is also excellent. Therefore, reliable anticorrosion treatment becomes possible.
【図１】本発明の熱収縮性粘着テ−プを示す説明図であ
る。FIG. 1 is an explanatory view showing a heat-shrinkable adhesive tape of the present invention.
【図２】本発明の熱収縮性粘着テ−プの段差箇所への巻
き付け状態を示す説明図である。FIG. 2 is an explanatory view showing a winding state of a heat-shrinkable adhesive tape of the present invention around a step portion.
【図３】本発明の熱収縮性粘着テ−プのテ−プ巻き付け
端末の状態を示す説明図である。FIG. 3 is an explanatory view showing a state of a tape winding terminal of the heat-shrinkable adhesive tape of the present invention.
１ 熱収縮性テ−プ支持体 ２ 粘着剤層 ３ 中間層 1 Heat Shrinkable Tape Support 2 Adhesive Layer 3 Intermediate Layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 池田 良一 大阪府茨木市下穂積１丁目１番２号 日東 電工株式会社内 (72)発明者 上杉 正紀 大阪府茨木市下穂積１丁目１番２号 日東 電工株式会社内 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Ryoichi Ikeda 1-2-2 Shimohozumi, Ibaraki City, Osaka Prefecture Nitto Denko Corporation (72) Masanori Uesugi 1-2-1 Shimohozumi, Ibaraki City, Osaka Prefecture Nitto Denko Corporation
Claims (2)
有する粘着テ−プにおいて、テ−プ支持体と粘着剤層と
の間に粘着剤層よりも軟らかい中間層を設けたことを特
徴とする熱収縮性粘着テ−プ。1. A pressure-sensitive adhesive tape having a pressure-sensitive adhesive layer on one surface of a heat-shrinkable tape support, wherein an intermediate layer softer than the pressure-sensitive adhesive layer is provided between the tape support and the pressure-sensitive adhesive layer. A heat-shrinkable adhesive tape characterized in that
℃における粘度が８×１０5ポイズ以下で、厚みが０．
０８ｍｍ〜２．０ｍｍの熱可塑性樹脂層により構成した
請求項１記載の熱収縮性粘着テ−プ。2. A vulcanized rubber-based adhesive layer, and an intermediate layer of 80
The viscosity at 8 ° C. is 8 × 10 5 poise or less and the thickness is 0.
The heat-shrinkable adhesive tape according to claim 1, which is composed of a thermoplastic resin layer having a thickness of 08 mm to 2.0 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6225953A JPH0867859A (en) | 1994-08-26 | 1994-08-26 | Heat-shrinkable adhesive tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6225953A JPH0867859A (en) | 1994-08-26 | 1994-08-26 | Heat-shrinkable adhesive tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0867859A true JPH0867859A (en) | 1996-03-12 |
Family
ID=16837486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6225953A Pending JPH0867859A (en) | 1994-08-26 | 1994-08-26 | Heat-shrinkable adhesive tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0867859A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024143054A1 (en) * | 2022-12-28 | 2024-07-04 | 日東電工株式会社 | Seal material |
-
1994
- 1994-08-26 JP JP6225953A patent/JPH0867859A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024143054A1 (en) * | 2022-12-28 | 2024-07-04 | 日東電工株式会社 | Seal material |
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