JPH0128793B2 - - Google Patents

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Publication number
JPH0128793B2
JPH0128793B2 JP56125129A JP12512981A JPH0128793B2 JP H0128793 B2 JPH0128793 B2 JP H0128793B2 JP 56125129 A JP56125129 A JP 56125129A JP 12512981 A JP12512981 A JP 12512981A JP H0128793 B2 JPH0128793 B2 JP H0128793B2
Authority
JP
Japan
Prior art keywords
adhesive
sheet
acrylic
modified polyolefin
polypropylene
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
Application number
JP56125129A
Other languages
Japanese (ja)
Other versions
JPS5827770A (en
Inventor
Toshuki Aritake
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.)
Mitsubishi Plastics Inc
Original Assignee
Mitsubishi Plastics Inc
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 Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP12512981A priority Critical patent/JPS5827770A/en
Priority to US06/397,237 priority patent/US4447485A/en
Priority to GB08220454A priority patent/GB2103513B/en
Priority to IT8222682A priority patent/IT1153152B/en
Priority to FR8213485A priority patent/FR2511022B1/en
Priority to DE3228998A priority patent/DE3228998C2/en
Publication of JPS5827770A publication Critical patent/JPS5827770A/en
Priority to US06/567,870 priority patent/US4513028A/en
Publication of JPH0128793B2 publication Critical patent/JPH0128793B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は粘着特性の優れた、ポリプロピレン系
シートを基材とする粘着テープの製造方法に関す
るものである。 近年、包装用、事務用等の粘着テープとして、
耐老化性、耐熱性等の特性が優れているアクリル
系粘着剤を延伸ポリプロピレンシート(以下
「OPPシート」という)に塗布したものが使われ
始めている。 該テープの製造においてはアクリル系粘着剤と
OPPシート間の接着力が弱く剥離するので、
OPPシートの粘着剤塗布面にあらかじめコロナ
処理等の表面活性化処理を施し、粘着剤界面と
OPPシート界面間の接着力を向上させることが
一般に行なわれている。 ところが、この粘着テープを再剥離用途に使用
すると、被着体によつては粘着剤層がOPPシー
トから界面破壊するいわゆる「のり残り」が生じ
るという問題があつた。 一方、上記アクリル系粘着剤は一般に有機溶剤
による溶液化がなされ基材に塗布されているが、
塗布後乾燥に多大な熱エネルギーを必要とし、ま
た環境衛生上の問題や火災の危険性等製造技術上
多くの問題をかかえている。そこで、アクリル系
粘着剤を無溶剤で基材に塗布するという方法が考
えられる。 ところがこの場合には、基材であるOPPシー
トが熱収縮しない100℃以下の温度で粘着剤を塗
布する必要があり、その結果使用するアクリル系
粘着剤は塗布時の粘度が低い、すなわち比較的低
分子量のものに限定される。こういつた低分子量
のアクリル系粘着剤では粘着特性が充分得られな
いという問題があつた。 本発明は、上記諸欠点を解決したものであつ
て、ポリプロピレン系シート基材と粘着剤とが強
固に接着した、無溶剤の高分子量アクリル系粘着
剤が塗布可能な粘着テープの製造方法を提供する
ものである。 すなわち本発明の要旨とするところは、ポリプ
ロピレン系シート基材の片面に、不飽和カルボン
酸もしくはその無水物を0.01〜10重量%含む変性
ポリオレフイン層を介して、反応基を有するアク
リル系粘着剤と架橋剤とを無溶剤で混合後塗布
し、該積層シートを加熱延伸することを特徴とす
る粘着テープの製造方法である。 本発明に使用するポリプロピレン系シートとし
てはアイソタクチツクポリプロピレン、あるいは
これに少量の他のポリオレフインをブレンドした
もの、プロピレンと他のα−オレフインとの共重
合体等のシートが挙げられる。この他、無機物や
石油樹脂、テルペン樹脂等をシートの延伸性を損
わない程度にブレンドしたものや、これらを積層
したシートも前記ポリプロピレン系シートとして
使用できる。また、変性ポリオレフイン層とはマ
レイン酸、アクリル酸、イタコン酸等の不飽和カ
ルボン酸、もしくは無水マレイン酸等の不飽和カ
ルボン酸の無水物をポリエチレン、ポリプロピレ
ン等のポリオレフインに0.01〜10重量%の含有率
で付加重合または共重合させたものである。不飽
和カルボン酸もしくはその無水物の含有率が0.01
重量%未満では最終的な粘着テープの投錨性が劣
り、10重量%を越えるとポリプロピレン系シート
との接着力が低下し、いずれも好ましくない。ポ
リプロピレン系シートと変性ポリオレフインとの
積層は通常の押出ラミネート法、共抽出法等によ
つて行なうことができる。 アクリル系粘着剤は、アクリル酸エステルを主
成分とし反応基を有する化合物を0.1〜1.5モル%
の範囲で共重合させたものであり、反応基を有す
る化合物にはアクリル酸、メタクリル酸、無水マ
レイン酸、ヒドロオキシエチルアクリレート等の
カルボン酸、カルボン酸無水物、水酸基等を有す
る化合物又はこれらの誘導体が挙げられる。反応
基を有する化合物が0.1モル%未満では最終的な
粘着テープの投錨性が劣り、15モル%を越える
と、粘着特性が悪化し好ましくない。 本発明に適用しうるアクリル系粘着剤の分子量
は重量平均分子量(ゲル.パーミエーシヨンクロ
マトグラフ法による)で25〜70万の範囲のものが
好ましい。20万よりも低分子量では必要な粘着特
性が発現せず、70万を越えるものは基材への塗布
が困難となる。 架橋剤としては、変性ポリオレフイン中の不飽
和カルボン酸もしくはその無水物及びアクリル系
粘着剤中の反応基と反応しうる基を1分子中に2
つ以上有する化合物であり、イソシアネート化合
物、アジリジン化合物、N−メチロール化合物等
が挙げられる。さらに該架橋剤の反応基を他の化
合物で化学結合させ、高温で反応基を遊離する様
にした、いわゆるブロツクされた架橋剤も使用で
きる。 アクリル系粘着剤と架橋剤を無溶剤で混合する
工程では、できるだけゲル化を防止する必要があ
り、該ブロツクされた架橋剤の使用は、作業上問
題のない程度までゲル化の低減を容易にはかれ
る。また混合は比較的低温で、かつできるだけ速
やかに基材シート上へ塗布することが必要であ
る。 本発明においては、後続の延伸工程で接着剤層
の厚さが薄くなる分だけ最初は粘着剤を厚く塗布
することになり、通常の粘着テープの粘着剤厚さ
(例えば20μ)には均一塗布できない上記高粘度
の粘着剤であつても通常のフアウンテンタイプコ
ーター等で容易に均一塗布することができる。粘
着剤塗布後の積層シートは通常の延伸装置によつ
て縦2〜10倍、横4〜10倍の延伸倍率で加熱下で
2軸延伸する。あらかじめ縦延伸されたシートに
粘着剤を塗布した場合は横方向に延伸する。この
延伸によつて高分子量の粘着剤を厚塗り後、均一
に薄くすることができる。なお必要に応じて背面
処理剤を、変性ポリオレフインを積層したポリプ
ロピレン系シート基材の裏面側に塗布する。塗布
は延伸工程前に実施することが好ましい。 本発明によれば、 ポリプロピレン系シート基材と反応基を有す
るアクリル系粘着剤との間に特定の変性ポリオ
レフインを介在させることにより、変性ポリオ
レフイン層と粘着剤とが強固に接着した投錨性
のよい粘着テープが得られる。この現象は、変
性ポリオレフインと粘着剤とがともに官能基を
有していることが寄与していると推定される。 基材シートに粘着剤を塗布した後延伸を行な
うことにより、最初に粘着剤を厚く塗ることが
できるため、従来無溶剤では塗布困難であつた
高分子量(即ち高粘度)のアクリル系粘着剤を
使用することができ、品質のよい粘着テープが
得られる。 基材シートに粘着剤を塗布した後加熱延伸を
行うことにより、粘着剤塗布時には基材シート
が厚いこと、延伸中には基材シートに安定した
張力が加わつていることにより、従来粘着剤塗
布時や粘着剤の架橋熱処理時に生じていた基材
の収縮、しわ入り等が防止され、また延伸時の
加熱により粘着剤の架橋処理が行われるともに
変性ポリオレフインと粘着剤との接着強度も増
加する。 等の優れた効果が発揮される。 以下実施例によりさらに詳細に説明する。 実施例 1 135℃のテトラリン溶液中で測定した極限粘度
が1.85でかつn−ヘプタン不溶分(沸点)で示す
アイソタクチツク・インデツクスが97%のポリプ
ロピレン70重量%と、ビカツト軟化点160℃のメ
チルペンテンポリマー(TPX、三井石油化学株
製)とが溶融混合された厚さ1600μのシート(以
下PP系シートという)と、固着剤として、表−
1に示した厚さ50μの各種変性ポリオレフインと
を押出ラミネーシヨン法により、2層の積層シー
トとした。ついでPP系シート裏面に市販の背面
処理剤をロールコーターで固形分の厚さ4μに塗
布した。さらに重量平均分子量440000で、カルボ
キシル基を6モル%含有するアクリル酸エステル
系ポリマー(粘着剤主成分)と、架橋剤として、
メチルエチルケトオキシムでブロツクされたイソ
ホロンジイソシアネート化合物(ブロツクされた
架橋剤)とを120℃で混合した粘着剤を、混合後
すみやかに変性ポリオレフイン層表面に塗布温度
120℃、厚さ800μで塗布した。この積層シートを
予熱後、162℃の延伸温度で縦6倍、横6倍に延
伸し、165℃で5秒間熱処理後巻取り、40℃で1
週間熟成した後、18mm幅にスリツトしてテープと
した。 得られたテープの厚み構成は、PP系シート層
40μ/変性ポリオレフイン層1μ/粘着剤層20μで
あつた。比較のため、変性ポリオレフインにかえ
てエチレン−エチルアクリレート(EEA)また
はスチレン−ブタジエン−スチレン(SBS)を使
用した粘着テープ、および二軸延伸ポリプロピレ
ン基材シートにぬれ指数40dyn/cm(JISK6768に
よる測定値)となるようにコロナ処理を施した
後、実施例1と同一粘着剤を20μの厚みで塗布し
た粘着テープを作成した。得られた粘着テープの
投錨性(注1)の比較を表−1に示す。 注1.投錨性:JISZ1522に規定する圧着ローラーを
使用し、室温で粘着剤面同志を圧着し、1週間
以上放置後、所定の温度(20℃、0℃)の雰囲
気でT型剥離試験を引張速度300mm/分で行な
い、剥離面の破壊形態を観察する。粘着剤層の
凝集破壊であれば良好(〇)、粘着剤層/変性
ポリオレフイン層または変性ポリオレフイン
層/PP系シート層および粘着剤層/PP系シー
ト層での界面破壊であるか、変性ポリオレフイ
ン自体の破壊の場合は不可(×)、さらに部分
的な界面破壊は(△)とした。
The present invention relates to a method for producing an adhesive tape having excellent adhesive properties and having a polypropylene sheet as a base material. In recent years, as adhesive tape for packaging, office use, etc.
Stretched polypropylene sheets (hereinafter referred to as ``OPP sheets'') coated with acrylic adhesives, which have excellent properties such as aging resistance and heat resistance, are beginning to be used. In the production of this tape, acrylic adhesive and
Because the adhesive force between OPP sheets is weak and they peel off,
Surface activation treatment such as corona treatment is applied to the adhesive-coated surface of the OPP sheet in advance, and the adhesive interface and
It is common practice to improve the adhesion between OPP sheet interfaces. However, when this adhesive tape is used for removable purposes, there is a problem in that, depending on the adherend, so-called "adhesive residue" occurs in which the adhesive layer breaks down at the interface from the OPP sheet. On the other hand, the above-mentioned acrylic adhesive is generally made into a solution with an organic solvent and applied to the base material.
It requires a large amount of thermal energy to dry after application, and it also poses many problems in terms of manufacturing technology, such as environmental hygiene problems and the risk of fire. Therefore, a method of applying an acrylic adhesive to a base material without a solvent may be considered. However, in this case, it is necessary to apply the adhesive at a temperature of 100°C or lower, at which the OPP sheet, which is the base material, does not shrink due to heat.As a result, the acrylic adhesive used has a low viscosity during application, that is, it has a relatively Limited to low molecular weight. A problem with such low molecular weight acrylic pressure-sensitive adhesives is that sufficient adhesive properties cannot be obtained. The present invention solves the above-mentioned drawbacks, and provides a method for producing an adhesive tape in which a polypropylene sheet base material and an adhesive are firmly bonded, and a solvent-free high molecular weight acrylic adhesive can be applied. It is something to do. That is, the gist of the present invention is to apply an acrylic pressure-sensitive adhesive having a reactive group to one side of a polypropylene sheet base via a modified polyolefin layer containing 0.01 to 10% by weight of an unsaturated carboxylic acid or its anhydride. This method of producing an adhesive tape is characterized in that the adhesive tape is mixed with a crosslinking agent without a solvent, and then applied, and the laminated sheet is heated and stretched. Examples of the polypropylene sheet used in the present invention include isotactic polypropylene, a blend thereof with a small amount of other polyolefin, and a copolymer of propylene and other α-olefin. In addition, blends of inorganic materials, petroleum resins, terpene resins, etc. to an extent that does not impair the sheet's stretchability, and sheets laminated with these materials can also be used as the polypropylene sheet. In addition, a modified polyolefin layer is a polyolefin such as polyethylene or polypropylene containing 0.01 to 10% by weight of an unsaturated carboxylic acid such as maleic acid, acrylic acid, itaconic acid, or an anhydride of an unsaturated carboxylic acid such as maleic anhydride. It is addition polymerized or copolymerized at a certain rate. Content of unsaturated carboxylic acid or its anhydride is 0.01
If it is less than 10% by weight, the anchoring properties of the final adhesive tape will be poor, and if it exceeds 10% by weight, the adhesive strength with the polypropylene sheet will be reduced, and both are not preferred. The polypropylene sheet and the modified polyolefin can be laminated by a conventional extrusion lamination method, co-extraction method, or the like. Acrylic adhesives are mainly composed of acrylic esters and contain 0.1 to 1.5 mol% of compounds with reactive groups.
Compounds with reactive groups include carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, hydroxyethyl acrylate, carboxylic acid anhydrides, compounds with hydroxyl groups, etc. Examples include derivatives. If the content of the compound having a reactive group is less than 0.1 mol%, the anchoring properties of the final adhesive tape will be poor, and if it exceeds 15 mol%, the adhesive properties will deteriorate, which is not preferred. The molecular weight of the acrylic pressure-sensitive adhesive applicable to the present invention is preferably in the range of 250,000 to 700,000 in terms of weight average molecular weight (according to gel permeation chromatography). If the molecular weight is lower than 200,000, the necessary adhesive properties will not be exhibited, and if it exceeds 700,000, it will be difficult to apply to the substrate. As a crosslinking agent, two groups in one molecule that can react with the unsaturated carboxylic acid or its anhydride in the modified polyolefin and the reactive group in the acrylic adhesive are used.
Examples include isocyanate compounds, aziridine compounds, and N-methylol compounds. Furthermore, a so-called blocked crosslinking agent, in which the reactive group of the crosslinking agent is chemically bonded with another compound and the reactive group is released at high temperature, can also be used. In the process of mixing an acrylic adhesive and a crosslinking agent without a solvent, it is necessary to prevent gelation as much as possible, and the use of the blocked crosslinking agent makes it easy to reduce gelation to an extent that does not cause any problems during work. It is measured. Further, it is necessary to mix the mixture at a relatively low temperature and apply it onto the base sheet as quickly as possible. In the present invention, the adhesive is initially applied thickly to compensate for the thinning of the adhesive layer in the subsequent stretching process, and the adhesive is applied uniformly compared to the adhesive thickness of ordinary adhesive tapes (for example, 20μ). Even if the above-mentioned high-viscosity adhesive is difficult to coat, it can be easily and uniformly coated using a common fountain-type coater or the like. The laminated sheet coated with the adhesive is biaxially stretched under heating at a stretching ratio of 2 to 10 times in the longitudinal direction and 4 to 10 times in the width direction using a conventional stretching device. If the adhesive is applied to a sheet that has been stretched in the longitudinal direction in advance, it is stretched in the transverse direction. By this stretching, a high molecular weight adhesive can be applied thickly and then uniformly thinned. Note that, if necessary, a back treatment agent is applied to the back side of the polypropylene sheet base material laminated with modified polyolefin. Preferably, the coating is performed before the stretching step. According to the present invention, by interposing a specific modified polyolefin between the polypropylene sheet base material and the acrylic adhesive having a reactive group, the modified polyolefin layer and the adhesive are firmly adhered to each other and have good anchoring properties. An adhesive tape is obtained. This phenomenon is presumed to be caused by the fact that both the modified polyolefin and the adhesive have functional groups. By applying the adhesive to the base sheet and then stretching it, the adhesive can be applied thickly at the beginning, making it possible to apply high molecular weight (i.e. high viscosity) acrylic adhesives, which were previously difficult to apply without solvents. A high-quality adhesive tape can be obtained. By heating and stretching the adhesive after applying the adhesive to the base sheet, the base sheet is thicker when the adhesive is applied, and stable tension is applied to the base sheet during stretching, making it easier to apply adhesives than conventional adhesives. This prevents the shrinkage and wrinkles of the base material that occur during cross-linking heat treatment of the adhesive, and also cross-links the adhesive due to heating during stretching, increasing the adhesive strength between the modified polyolefin and the adhesive. . Excellent effects such as The present invention will be explained in more detail with reference to Examples below. Example 1 70% by weight of polypropylene with an intrinsic viscosity of 1.85 measured in a tetralin solution at 135°C and an isotactic index of 97% in terms of n-heptane insoluble matter (boiling point), and a methylpentene polymer with a Vicat softening point of 160°C. (TPX, manufactured by Mitsui Petrochemicals Co., Ltd.) with a thickness of 1,600 μm (hereinafter referred to as PP sheet), and as a bonding agent,
A two-layer laminated sheet was prepared by extrusion lamination using various modified polyolefins having a thickness of 50 μm shown in 1. Next, a commercially available back treatment agent was applied to the back surface of the PP sheet using a roll coater to a solid content thickness of 4 μm. Furthermore, an acrylic acid ester polymer (main component of adhesive) having a weight average molecular weight of 440,000 and containing 6 mol% of carboxyl groups, and as a crosslinking agent,
An adhesive prepared by mixing an isophorone diisocyanate compound blocked with methyl ethyl ketoxime (blocked cross-linking agent) at 120°C is applied to the surface of the modified polyolefin layer immediately after mixing.
It was applied at 120°C to a thickness of 800μ. After preheating this laminated sheet, it was stretched 6 times vertically and 6 times horizontally at a stretching temperature of 162°C, heat-treated at 165°C for 5 seconds, rolled up, and stretched at 40°C for 1
After aging for a week, it was slit into 18 mm width tape. The thickness structure of the obtained tape is a PP sheet layer.
The thickness was 40μ/modified polyolefin layer 1μ/adhesive layer 20μ. For comparison, we used an adhesive tape using ethylene-ethyl acrylate (EEA) or styrene-butadiene-styrene (SBS) instead of modified polyolefin, and a biaxially oriented polypropylene base sheet with a wettability index of 40 dyn/cm (measured value according to JISK6768). ) After corona treatment, an adhesive tape was prepared by applying the same adhesive as in Example 1 to a thickness of 20 μm. Table 1 shows a comparison of the anchoring properties (Note 1) of the obtained adhesive tapes. Note 1. Anchoring property: Using a pressure roller specified in JISZ1522, press the adhesive surfaces together at room temperature, leave for one week or more, and then perform a T-peel test in an atmosphere at a specified temperature (20℃, 0℃). The tensile speed is 300 mm/min, and the fracture morphology of the peeled surface is observed. Cohesive failure in the adhesive layer is good (〇), or it is an interfacial failure in the adhesive layer/modified polyolefin layer or modified polyolefin layer/PP sheet layer and adhesive layer/PP sheet layer, or the modified polyolefin itself In the case of fracture, it was marked as not possible (x), and furthermore, partial interface destruction was marked as (△).

【表】 ピレンシートが収縮、しわ入りが発生。
表−1から不飽和カルボン酸または不飽和カル
ボン酸無水物の含有率が0.01〜10重量%の変性ポ
リオレフインを使用したテープは、投錨性が良好
な事が判る。 また、エチレン−エチルアクリレート
(EEA)、ステレン−ブタジエン−スチレン共重
合体(SBS)を介して、実施例のアクリル酸エス
テル系粘着剤を使用したものは、低温での投錨性
に劣ることが判る。 さらに、二重延伸ポリプロピレンシートのコロ
ナ処理品は投錨性が劣り、また粘着剤塗布によつ
てしわ入りが発生することが判る。 実施例 2 実施例1と同じ厚さ1600μのPP系シートを使用
し、固着剤として、イタコン酸を2重量%含有す
る厚さ50μの変性ポリプロピレンを押出ラミネー
トして、2層の積層シートとした。ついでPP系
シート裏面に4μの背面処理剤を塗布後、表−2
に示した各種重量平均分子量を有し、カルボキシ
ル基を6モル%含有するアクリル酸エステル系ポ
リマー(粘着剤主成分)と実施例1と同じブロツ
クされた架橋剤とを120℃で混合した粘着剤を混
合後すみやかに変性ポリオレフイン層表面に塗布
温度120℃、厚さ800μで塗布した。その後積層シ
ートを実施例1と同一の延伸、熱処理、熟成処理
に付した後、スリツトしてテープとした。得られ
た粘着テープは、投錨性が優れており(20℃及び
0℃において〇)、また従来無溶剤では塗布困難
であつた高分子量のアクリル系粘着剤であつて
も、均一な厚さにむらなく、また基材に収縮やし
わ入りを生じることなく塗布されたものであつ
た。得られた粘着テープの保持力(注2)及び剥
離性(注3)を表−2に示す。 注2.保持力:JISZ 1524に準じ、テープ幅18mm、
重ねしろ20mmのサンプルをステンレス板に貼着
し室温で24時間放置後、40℃の熱風乾燥中で1
Kgの静荷重をかけ、サンプルが落下するまでの
時間で表示した。落下するまでの時間が2時間
を越える場合は、2時間経過時のづれの長さで
表示した。 注3.凝集性:JISE 1522に準じ、ステンレス板に
18mm幅でテープを圧着し、室温で24時間放置
後、20℃×65%RHの雰囲気下、300mm/分の
引張速度で180゜剥離させた時の剥離面の破壊形
態を観察する。ステンレス板に凝集破壊、いわ
ゆるのり残りが全く生じない場合は良好(◎)、
全面にのり残りが生じる場合は不可(×)、さ
らに部分的なのり残りが生じる場合は(〇)と
した。
[Table] Pirene sheet shrinks and wrinkles appear.
From Table 1, it can be seen that tapes using modified polyolefins containing 0.01 to 10% by weight of unsaturated carboxylic acid or unsaturated carboxylic acid anhydride have good anchoring properties. In addition, it can be seen that those using the acrylic acid ester adhesive of the example through ethylene-ethyl acrylate (EEA) and sterene-butadiene-styrene copolymer (SBS) are inferior in anchoring performance at low temperatures. . Furthermore, it was found that corona-treated double-stretched polypropylene sheets had poor anchoring properties and wrinkled when adhesive was applied. Example 2 A PP sheet with a thickness of 1600 μm, which is the same as in Example 1, was extruded and laminated with modified polypropylene with a thickness of 50 μm containing 2% by weight of itaconic acid as a fixing agent to make a two-layer laminated sheet. . Next, after applying a 4μ back treatment agent to the back side of the PP sheet, Table 2
An adhesive prepared by mixing at 120°C an acrylic acid ester polymer (main component of the adhesive) having various weight average molecular weights as shown in (1) and containing 6 mol% of carboxyl groups and the same blocked crosslinking agent as in Example 1. Immediately after mixing, the mixture was coated on the surface of the modified polyolefin layer at a coating temperature of 120°C and a thickness of 800μ. Thereafter, the laminated sheet was subjected to the same stretching, heat treatment, and aging treatment as in Example 1, and then slit to form a tape. The obtained adhesive tape has excellent anchoring properties (○ at 20℃ and 0℃), and can be applied to a uniform thickness even with high molecular weight acrylic adhesives, which were previously difficult to apply without solvent. The coating was applied evenly and without causing any shrinkage or wrinkles on the base material. Table 2 shows the holding power (Note 2) and peelability (Note 3) of the obtained adhesive tape. Note 2. Holding power: According to JISZ 1524, tape width 18mm,
A sample with an overlapping margin of 20 mm was pasted on a stainless steel plate, left at room temperature for 24 hours, and then dried in hot air at 40°C.
The static load of kg was applied and the time taken for the sample to fall was expressed. If the time until the drop exceeded 2 hours, the length of the shift after 2 hours was displayed. Note 3. Cohesiveness: According to JISE 1522, on stainless steel plate
A tape with a width of 18 mm is crimped, and after being left at room temperature for 24 hours, it is peeled off at 180° at a tensile speed of 300 mm/min in an atmosphere of 20°C x 65% RH, and the fracture morphology of the peeled surface is observed. If there is no cohesive failure or so-called glue residue on the stainless steel plate, it is good (◎).
If there was adhesive residue on the entire surface, it was rated as unacceptable (x), and if there was partial adhesive residue, it was rated as (〇).

【表】 ※ 測定法はゲル・パーミエーシヨン・クロ
マトグラフ(GPC)法による。
上記した如く、本発明は粘着特性の優れたポリ
プロピレン系シートを基材とする粘着テープの製
造方法を提供するものである。さらに粘着シー
ト、ラベルの製造方法にも適用でき、その効果は
著しく大きい。
[Table] *Measurement method is based on gel permeation chromatography (GPC) method.
As described above, the present invention provides a method for manufacturing an adhesive tape using a polypropylene sheet having excellent adhesive properties as a base material. Furthermore, it can be applied to methods for manufacturing adhesive sheets and labels, and its effects are extremely large.

Claims (1)

【特許請求の範囲】[Claims] 1 ポリプロピレン系シート基材の片面に、不飽
和カルボン酸もしくはその無水物を0.01〜10重量
%含む変性ポリオレフイン層を介して、反応基を
有するアクリル系粘着剤と架橋剤とを無溶剤で混
合後塗布し、次いで、該積層シートを加熱延伸す
ることを特徴とする粘着テープの製造方法。
1 After mixing an acrylic adhesive having a reactive group and a crosslinking agent without a solvent on one side of a polypropylene sheet base material via a modified polyolefin layer containing 0.01 to 10% by weight of an unsaturated carboxylic acid or its anhydride. 1. A method for producing an adhesive tape, which comprises applying the adhesive tape, and then heating and stretching the laminated sheet.
JP12512981A 1981-08-04 1981-08-10 Manufacturing of pressure-sensitive adhesive tape Granted JPS5827770A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP12512981A JPS5827770A (en) 1981-08-10 1981-08-10 Manufacturing of pressure-sensitive adhesive tape
US06/397,237 US4447485A (en) 1981-08-04 1982-07-12 Adhesive tape and process for its production
GB08220454A GB2103513B (en) 1981-08-04 1982-07-14 Adhesive tape and process for its production
IT8222682A IT1153152B (en) 1981-08-04 1982-07-30 ADHESIVE TAPE AND PROCESS FOR ITS PRODUCTION
FR8213485A FR2511022B1 (en) 1981-08-04 1982-08-02 CORRECTIVE ADHESIVE TAPE AND METHOD FOR ITS PREPARATION
DE3228998A DE3228998C2 (en) 1981-08-04 1982-08-03 Adhesive tape and method of making the same
US06/567,870 US4513028A (en) 1981-08-04 1984-03-05 Adhesive tape and process for its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12512981A JPS5827770A (en) 1981-08-10 1981-08-10 Manufacturing of pressure-sensitive adhesive tape

Publications (2)

Publication Number Publication Date
JPS5827770A JPS5827770A (en) 1983-02-18
JPH0128793B2 true JPH0128793B2 (en) 1989-06-05

Family

ID=14902565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12512981A Granted JPS5827770A (en) 1981-08-04 1981-08-10 Manufacturing of pressure-sensitive adhesive tape

Country Status (1)

Country Link
JP (1) JPS5827770A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013873A (en) * 1983-07-05 1985-01-24 Sanyo Kokusaku Pulp Co Ltd Pressure-sensitive adhesive polyolefin tape or sheet
DE3545591A1 (en) * 1985-12-21 1987-06-25 Wolff Walsrode Ag METHOD FOR FINISHING FILMS
JP2001288422A (en) * 2000-04-06 2001-10-16 Sekisui Chem Co Ltd Self-adhesive tape
DE10052955A1 (en) * 2000-10-25 2002-06-06 Tesa Ag Use of PSAs with anisotropic properties for stamped products
KR101400573B1 (en) * 2006-07-17 2014-05-28 애브리 데니슨 코포레이션 Asymmetric multilayered polymeric film and label stock and label thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5137935A (en) * 1974-09-27 1976-03-30 Nichiban Kk Nenchakushiitono seizohoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5137935A (en) * 1974-09-27 1976-03-30 Nichiban Kk Nenchakushiitono seizohoho

Also Published As

Publication number Publication date
JPS5827770A (en) 1983-02-18

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