JPH11199839A - Surface-protection film - Google Patents
Surface-protection filmInfo
- Publication number
- JPH11199839A JPH11199839A JP322098A JP322098A JPH11199839A JP H11199839 A JPH11199839 A JP H11199839A JP 322098 A JP322098 A JP 322098A JP 322098 A JP322098 A JP 322098A JP H11199839 A JPH11199839 A JP H11199839A
- Authority
- JP
- Japan
- Prior art keywords
- adherend
- weight
- polymer block
- adhesive layer
- styrene
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、合成樹脂板、金属
板、化粧合板、被覆塗装鋼板、各種銘板等の表面に仮接
着され、これらの表面に塵や埃が付着したり傷つくのを
防止するために用いられる表面保護フィルムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to temporarily adhere to the surface of a synthetic resin plate, a metal plate, a decorative plywood, a coated coated steel plate, various nameplates, etc., and to prevent dust and dirt from adhering or being damaged on these surfaces. The present invention relates to a surface protective film used for forming a protective film.
【０００２】[0002]
【従来の技術】合成樹脂板、金属板、化粧合板等の加工
時や搬送時、又、保管中に表面が傷ついたり汚れるのを
防止するために、その表面に可塑化塩化ビニル樹脂やポ
リオレフィン系樹脂からなる基材フィルムの一面に粘着
剤層が設けられた表面保護フィルムを仮接着することが
広く行われている。上記表面保護フィルムには被着体の
加工時や搬送時、保管中には被着体に貼り合わされて密
着し、不要となれば被着体表面に粘着剤を残すことなく
容易に剥離することができる粘着性が要求される。2. Description of the Related Art In order to prevent the surface of a synthetic resin plate, a metal plate, a decorative plywood or the like from being damaged or stained during processing, transportation or storage, a plasticized vinyl chloride resin or a polyolefin resin is applied to the surface. It has been widely practiced to temporarily bond a surface protective film having a pressure-sensitive adhesive layer provided on one surface of a base film made of a resin. The surface protective film is adhered to and adhered to the adherend during processing, transport, and storage of the adherend, and is easily peeled off without leaving an adhesive on the adherend surface when unnecessary. Is required.
【０００３】このような表面保護フィルムとして、例え
ば、特開平７−２４１９６０号公報に、スチレン１〜５
０重量％とジエン系炭化水素９９〜５０重量％からなる
ランダム共重合体の水素添加物６０重量％以上、及びポ
リオレフィン４０重量％以下の組成からなる粘着層と、
スチレン１〜５０重量％とジエン系炭化水素９９〜５０
重量％からなるランダム共重合体の水素添加物６０重量
％及びポリオレフィン４０重量％を超える組成からなる
支持層とが積層された表面保護フィルムが開示されてい
る。As such a surface protective film, for example, Japanese Patent Application Laid-Open No. 7-241960 discloses styrene 1-5.
An adhesive layer having a composition of 60% by weight or more of a hydrogenated product of a random copolymer comprising 0% by weight and 99 to 50% by weight of a diene hydrocarbon, and 40% by weight or less of a polyolefin;
Styrene 1 to 50% by weight and diene hydrocarbon 99 to 50
A surface protective film is disclosed in which a hydrogenated random copolymer of 60% by weight and a support layer having a composition of more than 40% by weight of a polyolefin are laminated.
【０００４】上記公報に記載された粘着層は、被着体に
仮接着した後に起こる接着昂進によって、剥離除去する
際に該被着体表面に粘着剤の一部が残り（以下「糊残
り」という）易い。又、糊残りという程でもないが強い
剥離抵抗と弱い剥離抵抗が繰り返されるためにスリップ
スティックと呼ばれる剥離抵抗のむらが生じる。これは
表面保護フィルムの強い剥離抵抗部分と弱い剥離抵抗部
分との剥離が断続的となり、その境界線で極めて薄い粘
着剤層の縞模様が現れて外観的に商品価値を低下もしく
は喪失するという問題となる。In the adhesive layer described in the above publication, a part of the adhesive remains on the surface of the adherend (hereinafter referred to as “adhesive residue”) when the adhesive layer is peeled and removed due to the increase in adhesion that occurs after temporary adhesion to the adherend. It is easy). In addition, since a strong peeling resistance and a weak peeling resistance are repeated, although not to the extent of adhesive residue, uneven peeling resistance called a slip stick occurs. This is a problem that the peeling between the strong peeling resistance part and the weak peeling resistance part of the surface protection film is intermittent, and the stripe pattern of the extremely thin pressure-sensitive adhesive layer appears at the boundary line, and the commercial value is reduced or lost in appearance. Becomes
【０００５】又、特開平５−１９４９２３号公報には、
一般式Ａ−Ｂ−ＡまたはＡ−Ｂで表されるブロック共重
合体（但し、Ａはスチレン系重合体ブロック、Ｂはブタ
ジエン重合体ブロックもしくはイソプレン重合体ブロッ
ク、又はブタジエン重合体ブロックもしくはイソプレン
重合体ブロックを水素添加して得られるオレフィン系重
合体ブロック）１００重量部と粘着付与樹脂１０〜２０
０重量部と、ポリオレフィン樹脂１０〜２００重量部と
が含有されてなる粘着剤層がポリオレフィンからなる基
材フィルムの片面に形成された表面保護フィルムが開示
されている。Japanese Patent Laid-Open No. 5-194923 discloses that
A block copolymer represented by the general formula ABA or AB (where A is a styrene polymer block, B is a butadiene polymer block or isoprene polymer block, or a butadiene polymer block or isoprene polymer block) 100 parts by weight of an olefin-based polymer block obtained by hydrogenating the united block) and a tackifying resin 10 to 20
There is disclosed a surface protective film in which an adhesive layer containing 0 parts by weight and 10 to 200 parts by weight of a polyolefin resin is formed on one surface of a base film made of a polyolefin.
【０００６】上記特開平５−１９４９２３号公報に記載
された表面保護フィルムでは、粘着付与樹脂が低分子量
のものであるため、仮接着後に受ける経時的加熱によ
り、条件によっては粘着付与樹脂が粘着剤層表面から被
着体との界面にブリードアウトし、用済み後の剥離時に
被着体表面に転写されたまま残ってしまうという現象が
発生する。この転写の程度によっては、被着体表面に印
刷した場合にインクの投錨性が低下したり、被着体表面
にくもりが生じて商品価値が無くなるという問題があっ
た。[0006] In the surface protective film described in JP-A-5-194923, since the tackifying resin has a low molecular weight, the tackifying resin may, depending on the conditions, be subjected to temporal heating after temporary bonding, depending on the conditions. A phenomenon occurs in which bleed out from the surface of the layer to the interface with the adherend and remains transferred to the surface of the adherend during peeling after use. Depending on the degree of the transfer, there is a problem that when printed on the surface of the adherend, the anchoring property of the ink is reduced, and cloudiness occurs on the surface of the adherend, and the commercial value is lost.
【０００７】更に、特開平８−３１１４１９号公報に
は、熱可塑性樹脂フィルムからなる基材層の片面に粘着
剤層が形成された表面保護フィルムにおいて、粘着剤層
が重合触媒として四価の遷移金属を含むメタロセン化合
物を用いて得られ、且つ、クロス分別法によって１０重
量％溶出したときの温度から１００重量％溶出終了した
ときの温度の幅が３０℃以下、重量平均分子量／数平均
分子量＝１．５〜３．５であり、密度が０．８４０〜
０．９２０ｇ／ｃｍ3 であるポリエチレン系樹脂からな
る表面保護フィルムが開示されている。Further, Japanese Patent Application Laid-Open No. 8-31419 discloses a surface protection film having a pressure-sensitive adhesive layer formed on one surface of a base material layer made of a thermoplastic resin film, wherein the pressure-sensitive adhesive layer has a tetravalent transition as a polymerization catalyst. It is obtained using a metallocene compound containing a metal, and has a temperature range of 30 ° C. or less when the elution is completed at 100% by weight from the temperature at which 10% by weight is eluted by the cross fractionation method, and the weight average molecular weight / number average molecular weight = 1.5-3.5, density 0.840-
A surface protection film made of a polyethylene resin having a weight of 0.920 g / cm 3 is disclosed.
【０００８】上記特開平８−３１１４１９号公報に記載
された表面保護フィルムによると、仮接着後に受ける経
時的加熱によりフィルムの収縮に対する粘着剤の保持力
が不充分となるため、被着体の端部から表面保護フィル
ムが剥がれ、表面保護の機能を果たさなくなるという問
題があった。According to the surface protective film described in the above-mentioned Japanese Patent Application Laid-Open No. 8-31419, the holding force of the pressure-sensitive adhesive against the shrinkage of the film due to the temporal heating applied after the temporary bonding becomes insufficient. There was a problem that the surface protection film was peeled off from the part and the function of surface protection was no longer achieved.
【０００９】[0009]
【発明が解決しようとする課題】本発明は上記の事実に
鑑みてなされたものであって、被着体に対する適度の仮
接着力を有し、且つ、接着昂進が少なく、被着体から剥
離しても粘着剤で汚染したり剥離の際に被着体を破損す
ることのない表面保護フィルムを提供することを目的と
する。DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has an appropriate temporary adhesive force to an adherend, a small increase in adhesion, and a separation from the adherend. It is an object of the present invention to provide a surface protective film that does not contaminate with an adhesive or damage an adherend during peeling.
【００１０】[0010]
【課題を解決するための手段】本発明の表面保護フィル
ムは、熱可塑性樹脂からなる基材フィルムの一面に、一
般式Ａ−Ｂ−Ａで表されるブロック共重合体（但し、Ａ
はスチレン系重合体ブロック、Ｂはブタジエン重合体ブ
ロックもしくはイソプレン重合体ブロック、又はこれら
の重合体をブタジエン重合体もしくはイソプレン重合体
を水素添加して得られるオレフィン系重合体ブロックを
示す）３０〜７０重量％及びｎ−ペンタン抽出法による
抽出分が１．０重量％未満であるポリオレフィン系樹脂
７０〜３０重量％からなる粘着剤層が積層されてなるこ
とを特徴とするものである。Means for Solving the Problems The surface protective film of the present invention comprises, on one surface of a base film made of a thermoplastic resin, a block copolymer represented by the general formula ABA (provided that A
Represents a styrene-based polymer block, B represents a butadiene polymer block or an isoprene polymer block, or an olefin-based polymer block obtained by hydrogenating a butadiene polymer or an isoprene polymer of these polymers.) It is characterized in that a pressure-sensitive adhesive layer comprising 70 to 30% by weight of a polyolefin resin whose weight% and extractables by the n-pentane extraction method are less than 1.0% by weight is laminated.
【００１１】本発明で基材フィルムに用いられる熱可塑
性樹脂は特に限定されるものではなく、例えば、低密度
ポリエチレン、中密度ポリエチレン、高密度ポリエチレ
ン、直鎖状低密度ポリエチレン、ポリプロピレン（ホモ
ポリマー、ランダムコポリマー、ブロックコポリマ
ー）、エチレン−α−オレフィン共重合体、プロピレン
−α−オレフィン共重合体、エチレン−エチルアクリレ
ート共重合体、エチレン−メチルメタクリレート共重合
体、エチレン−酢酸ビニル共重合体、エチレン−ｎ−ブ
チルアクリレート共重合体等のオレフィン系樹脂が挙げ
られる。尚、上記α−オレフィンとしては、エチレン、
プロピレンとそれぞれ共重合可能であれば特に限定され
ず、例えば、プロピレン、１−ヘキセン、４−メチル−
１ペンテン、１−オクテン、１−ブテン、１−ペンテ
ン、１−ヘプテン等が挙げられる。上記ポリオレフィン
系樹脂は２種以上が適宜混合されて用いられてもよい。The thermoplastic resin used for the substrate film in the present invention is not particularly limited. For example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene (homopolymer, Random copolymer, block copolymer), ethylene-α-olefin copolymer, propylene-α-olefin copolymer, ethylene-ethyl acrylate copolymer, ethylene-methyl methacrylate copolymer, ethylene-vinyl acetate copolymer, ethylene And olefin resins such as -n-butyl acrylate copolymer. Incidentally, as the α-olefin, ethylene,
It is not particularly limited as long as it can be copolymerized with propylene. For example, propylene, 1-hexene, 4-methyl-
1-pentene, 1-octene, 1-butene, 1-pentene, 1-heptene and the like. Two or more kinds of the polyolefin-based resins may be used by being appropriately mixed.
【００１２】又、上記熱可塑性樹脂には、必要に応じて
その物性を阻害しない範囲内で、タルク等の充填剤や、
ガラスバルーン、シリカバルーン等の無機中空粒子から
なる補強材、酸化防止剤、紫外線吸収剤、光安定化剤等
が添加されてもよい。[0012] If necessary, a filler such as talc or the like may be added to the thermoplastic resin as long as the physical properties are not impaired.
A reinforcing material composed of inorganic hollow particles such as a glass balloon and a silica balloon, an antioxidant, an ultraviolet absorber, a light stabilizer and the like may be added.
【００１３】本発明の粘着剤層に用いられる粘着剤は、
一般式Ａ−Ｂ−Ａで表されるブロック共重合体（以下
「ブロック共重合体（Ｉ）」という）３０〜７０重量％
及びポリオレフィン系樹脂７０〜３０重量％からなる粘
着剤に限定される。The pressure-sensitive adhesive used in the pressure-sensitive adhesive layer of the present invention comprises:
30 to 70% by weight of a block copolymer represented by the general formula ABA (hereinafter referred to as "block copolymer (I)")
And an adhesive comprising 70 to 30% by weight of a polyolefin resin.
【００１４】上記ブロック共重合体（Ｉ）には、必要に
応じて一般式Ａ−Ｂで表されるブロック共重合体（II）
（但し、Ａはスチレン系重合体ブロック、Ｂはブタジエ
ン重合体ブロックもしくはイソプレン重合体ブロック、
又はこれらの重合体をブタジエン重合体もしくはイソプ
レン重合体を水素添加して得られるオレフィン系重合体
ブロックを示す）が配合されてもよい（以下、上記ブロ
ック共重合体（Ｉ）とブロック共重合体（II）とを併せ
て「スチレン系熱可塑性エラストマー」と総称する）。The above block copolymer (I) may, if necessary, include a block copolymer (II) represented by the general formula AB
(However, A is a styrene-based polymer block, B is a butadiene polymer block or an isoprene polymer block,
Alternatively, these polymers may be blended with an olefin-based polymer block obtained by hydrogenating a butadiene polymer or an isoprene polymer (hereinafter referred to as the block copolymer (I) and the block copolymer). (II) together with "styrene-based thermoplastic elastomer").
【００１５】ブロック共重合体（II）が配合される場合
のブロック共重合体（Ｉ）とブロック共重合体（II）の
重量比は、ブロック共重合体（Ｉ）：ブロック共重合体
（II）＝２０〜１００：８０〜０が好ましく、より好ま
しくは５０〜１００：５０〜０である。When the block copolymer (II) is blended, the weight ratio of the block copolymer (I) to the block copolymer (II) is as follows: block copolymer (I): block copolymer (II) ) = 20-100: 80-0, more preferably 50-100: 50-0.
【００１６】スチレン系熱可塑性エラストマーが上記範
囲よりも多いと粘着性が強くなりすぎて仮接着した表面
保護フィルムの剥離が困難となり、剥離時に糊残りを生
じるおそれがある。又、上記範囲よりも少ないと被着体
に対する粘着力が得られないことに加え、経時的な加熱
を受けると被着体に対する保持力が低下し、被着体の端
部から自然剥離を起こして表面保護の機能を果たさなく
なる。If the amount of the styrene-based thermoplastic elastomer is larger than the above range, the tackiness becomes too strong, so that it is difficult to peel off the temporarily adhered surface protective film, and there is a possibility that glue remains at the time of peeling. In addition, when the amount is less than the above range, the adhesive force to the adherend cannot be obtained, and when heated over time, the holding force on the adherend decreases, causing spontaneous peeling from the end of the adherend. As a result, the function of protecting the surface is not fulfilled.
【００１７】上記スチレン系熱可塑性エラストマー中の
Ａ成分とＢ成分の重量比は、スチレン系熱可塑性エラス
トマーがブロック共重合体（Ｉ）のみからなるもの、及
びブロック共重合体（Ｉ）とブロック共重合体（II）と
の混合物からなるもののいずれの場合においても、Ａ成
分：Ｂ成分＝２〜５０：９８〜５０が好ましく、より好
ましくは５〜４０：９５〜６０である。The weight ratios of the component A and the component B in the styrene-based thermoplastic elastomer are those in which the styrene-based thermoplastic elastomer comprises only the block copolymer (I) and those in which the block copolymer (I) and the block copolymer (I) are used. In any case consisting of a mixture with the polymer (II), A component: B component is preferably 2 to 50:98 to 50, and more preferably 5 to 40:95 to 60.
【００１８】Ａ成分の含有量が多すぎると被着体に対す
る粘着力が低下し、充分な仮接着力が得られず、少なす
ぎると凝集力が低下して剥離時に糊残りが発生し、被着
体表面を汚染するおそれがある。従って、Ａ成分とＢ成
分の重量比は上記の範囲で選択することが好ましい。If the content of the component A is too large, the adhesive strength to the adherend is reduced, and sufficient temporary adhesive strength cannot be obtained. If the content is too small, the cohesive force is reduced, and adhesive residue is generated at the time of peeling. There is a risk of contaminating the body surface. Therefore, it is preferable to select the weight ratio of the component A and the component B within the above range.
【００１９】上記スチレン系熱可塑性エラストマーにお
いて、スチレン系重合体ブロック（Ａ）の重量平均分子
量は４０００〜４００００が好ましく、より好ましくは
６０００〜２００００である。又、そのガラス転移温度
は２０℃以上のものが好ましい。In the styrenic thermoplastic elastomer, the weight average molecular weight of the styrenic polymer block (A) is preferably from 4,000 to 40,000, more preferably from 6,000 to 20,000. The glass transition temperature is preferably 20 ° C. or higher.
【００２０】粘着剤層を構成するポリオレフィン系樹脂
は特に限定されるものではないが、例えば、低密度ポリ
エチレン、直鎖状低密度ポリエチレン，中密度ポリエチ
レン、高密度ポリエチレン、ポリプロピレン、エチレン
−α−オレフィン共重合体、プロピレン−α−オレフィ
ン共重合体、エチレン−エチル（メタ）アクリレート共
重合体、エチレン−メチル（メタ）アクリレート共重合
体等が挙げられ、これらは単独で用いられてもよく、２
種以上が併用されてもよい。The polyolefin resin constituting the pressure-sensitive adhesive layer is not particularly limited. Examples thereof include low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, and ethylene-α-olefin. Copolymers, propylene-α-olefin copolymers, ethylene-ethyl (meth) acrylate copolymers, ethylene-methyl (meth) acrylate copolymers, and the like may be used, and these may be used alone.
More than one species may be used in combination.
【００２１】尚、上記α−オレフィンとしては、エチレ
ン、プロピレンとそれぞれ共重合可能であれば特に限定
されず、例えば、プロピレン、１−ヘキセン、４−メチ
ル−１ペンテン、１−オクテン、１−ブテン、１−ペン
テン、１−ヘプテン等が挙げられる。The α-olefin is not particularly limited as long as it can be copolymerized with ethylene and propylene. Examples thereof include propylene, 1-hexene, 4-methyl-1pentene, 1-octene and 1-butene. , 1-pentene, 1-heptene and the like.
【００２２】上記ポリオレフィン系樹脂は低分子量分が
少ないことが好ましく、具体的には沸騰ｎ−ペンタンで
抽出される低分子量分が１．０重量％未満であることが
必要である。低分子量分が１．０重量％以上で存在する
と、この低分子量分が温度変化や経時変化に応じて粘着
特性に悪影響を及ぼしたり、被着体との界面にブリード
アウトして被着体表面を汚染するという問題が発生す
る。It is preferable that the above-mentioned polyolefin resin has a small low molecular weight component. Specifically, the low molecular weight component extracted with boiling n-pentane needs to be less than 1.0% by weight. When the low molecular weight component is present in an amount of 1.0% by weight or more, the low molecular weight component adversely affects the adhesive properties in accordance with a change in temperature or a change with time, or bleeds out to the interface with the adherend and causes the surface of the adherend to adhere. The problem of polluting occurs.
【００２３】熱可塑性樹脂からなる基材フィルムに粘着
剤層を積層する手段は特に限定されないが、例えば、基
材フィルムとなる熱可塑性樹脂と粘着剤組成物とを、Ｔ
ダイもしくはインフレーションの多層押出機を用いて同
時に押出しながら積層一体化する２層共押出成形法、又
は熱可塑性樹脂を押出機等の成形手段により基材フィル
ムを成形した後、この上に粘着剤組成物を押出ラミネー
トや熱ラミネート等の手段により積層するラミネート法
等が挙げられる。The means for laminating the pressure-sensitive adhesive layer on the substrate film made of a thermoplastic resin is not particularly limited. For example, the thermoplastic resin serving as the substrate film and the pressure-sensitive adhesive composition are
A two-layer co-extrusion molding method in which lamination and integration are performed while simultaneously extruding using a die or inflation multilayer extruder, or a thermoplastic resin is molded into a base film by a molding means such as an extruder, and then an adhesive composition is formed thereon. A laminating method in which objects are laminated by means such as extrusion lamination or thermal lamination is exemplified.
【００２４】特に共押出成形法によると、基材フィルム
と粘着剤層とが粘着剤組成物特有の極性による化学的な
結合に加え、物理的なアンカー効果が加味されて強固に
一体化される。これにより厳しい使用条件に置かれても
自然に剥離することがない。更に、従来から汎用されて
いる成形設備が利用できるとともに、極めて容易に製造
することができる。In particular, according to the coextrusion molding method, the base film and the pressure-sensitive adhesive layer are firmly integrated with each other in consideration of a physical anchor effect in addition to a chemical bond due to the polarity peculiar to the pressure-sensitive adhesive composition. . This prevents spontaneous peeling even under severe use conditions. Further, the molding equipment generally used conventionally can be used, and it can be manufactured very easily.
【００２５】基材フィルム及び粘着剤層の厚みは表面保
護フィルムの用途に応じて適宜設定されるが、通常は基
材フィルムが２０〜１００μｍ、粘着剤層は２０〜８０
μｍ程度である。The thicknesses of the substrate film and the pressure-sensitive adhesive layer are appropriately set according to the use of the surface protective film. Usually, the thickness of the substrate film is 20 to 100 μm and the pressure-sensitive adhesive layer is 20 to 80 μm.
It is about μm.
【００２６】[0026]
【発明の実施の形態】以下に本発明の実施例を説明す
る。実施例及び比較例で次のものを用いた。基材フィルム ポリエチレン（三井石油化学社製，商品名「ミラソン１
２」，ＭＦＲ＝３．０ｇ／１０分・１９０℃）Embodiments of the present invention will be described below. The following were used in the examples and comparative examples. Polyethylene substrate film (Mitsui Petrochemical Co., Ltd., trade name "Mirason 1
2 ", MFR = 3.0 g / 10 minutes at 190 ° C)
【００２７】粘着剤層 ＳＥＢＳ−１：スチレン−ブタジエン−スチレンブロッ
ク共重合体の水素添加物（旭化成社製，商品名「タフテ
ックＨ１０５２」，スチレン含有量２０重量％，ＭＦＲ
＝１３ｇ／１０分・２３０℃，重量平均分子量＝約９１
０００） ＳＥＢＳ−２：スチレン−ブタジエン−スチレンブロッ
ク共重合体の水素添加物（旭化成社製，商品名「タフテ
ックＨ１０３１」，スチレン含有量３０重量％，ＭＦＲ
＝１５０ｇ／１０分・２３０℃，重量平均分子量＝約５
９０００） ＳＥＰＳ：スチレン−イソプレン−スチレンブロック共
重合体の水素添加物（クラレ社製，商品名「セプトン２
００２」，スチレン含有量＝３０重量％，ＭＦＲ＝７０
ｇ／１０分・２３０℃，重量平均分子量＝約５６００
０） ポリエチレン−１：（住友化学社製，「Ｆ４１１−
０」，密度＝０．９２５ｇ／ｃｍ3 ，ＭＦＲ＝５．０ｇ
／１０分・１９０℃，沸騰ｎ−ペンタンにより抽出され
る低分子量分＝０．８重量％） ポリエチレン−２：（三菱化学社製，「ＬＣ５００」，
密度＝０．９１８ｇ／ｃｍ3 ，ＭＦＲ＝４．０ｇ／１０
分・１９０℃，沸騰ｎ−ペンタンにより抽出される低分
子量分＝２．１重量％） Adhesive layer SEBS-1: Hydrogenated product of styrene-butadiene-styrene block copolymer (trade name "TUFTEC H1052" manufactured by Asahi Kasei Corporation, styrene content 20% by weight, MFR
= 13 g / 10 min at 230 ° C, weight average molecular weight = about 91
000) SEBS-2: Hydrogenated product of styrene-butadiene-styrene block copolymer (trade name “TUFTEC H1031” manufactured by Asahi Kasei Corporation, styrene content 30% by weight, MFR
= 150 g / 10 min. At 230 ° C, weight average molecular weight = about 5
9000) SEPS: hydrogenated styrene-isoprene-styrene block copolymer (trade name “Septon 2” manufactured by Kuraray Co., Ltd.)
002 ", styrene content = 30% by weight, MFR = 70
g / 10 minutes at 230 ° C., weight average molecular weight = about 5600
0) Polyethylene-1: (manufactured by Sumitomo Chemical Co., Ltd., “F411-
0 ", density = 0.925 g / cm 3 , MFR = 5.0 g
/ 10 minutes at 190 ° C., low molecular weight extracted with boiling n-pentane = 0.8% by weight) Polyethylene-2: (LC500, manufactured by Mitsubishi Chemical Corporation)
Density = 0.918 g / cm 3 , MFR = 4.0 g / 10
Min. Low molecular weight extracted by boiling n-pentane at 190 ° C. = 2.1% by weight)
【００２８】（実施例１〜４、比較例１〜５）上記のも
のを表１に示す組合せと混合量で配合して粘着剤組成物
とし、基材樹脂とともにインフレーション法の共押出金
型に供給し、基材層を４０μｍ、粘着剤層を３０μｍの
厚みで共押出成形して表面保護フィルムを作製した。(Examples 1 to 4 and Comparative Examples 1 to 5) The above-mentioned components were mixed with the combinations shown in Table 1 in a mixing amount to prepare a pressure-sensitive adhesive composition, which was then co-extruded with a base resin into a co-extrusion die of an inflation method. The mixture was supplied, and the base material layer was co-extruded with a thickness of 40 μm and the pressure-sensitive adhesive layer with a thickness of 30 μm to prepare a surface protection film.
【００２９】性能評価 実施例１〜４及び比較例１〜５で得られた表面保護フィ
ルムの性能を評価するために、下記の方法で測定及び観
察し、その結果を表１に示した。試験片の作製；表面保
護フィルムを幅２５ｍｍに裁断し、これを厚さ１ｍｍの
ポリカーボネート板（三菱瓦斯化学社製，商品名「ユー
ピロンＮＦ２０００」）表面に２ｋｇの圧着ローラーを
用いて３００ｍｍ／分の速度で貼り付けて試験片とし
た。 Performance Evaluation In order to evaluate the performance of the surface protective films obtained in Examples 1 to 4 and Comparative Examples 1 to 5, measurement and observation were carried out by the following methods, and the results are shown in Table 1. Preparation of a test piece: A surface protection film was cut into a width of 25 mm, and this was cut on a 1 mm-thick polycarbonate plate (manufactured by Mitsubishi Gas Chemical Company, trade name "Iupilon NF2000") using a 2 kg pressure roller at 300 mm / min. A test piece was attached at a speed.
【００３０】Ｉ．初期粘着力 上記試験片を２３℃、６５％ＲＨの測定環境下に３０分
間放置した後、ＪＩＳＺ ０２３７に準拠して１８０度
引き剥がし粘着力を測定し、これを初期粘着力とした。 II．経時粘着力（１） 試験片をギヤオーブン内に入れ７０℃で３０分間加熱し
た後、２３℃、６５％ＲＨの測定環境下に３０分間放置
し、ＪＩＳ Ｚ ０２３７に準拠して１８０度引き剥が
し粘着力を測定し、これを経時粘着力（１）とした。 III.経時粘着力（２） 加熱時間を９０℃で３０分間としたこと以外は経時粘着
力（１）と同様にして１８０度引き剥がし粘着力を測定
し、これを経時粘着力（２）とした。 IV．経時粘着力（３） 試験片を紫外線照射装置により６６６０ｍｊ／ｃｍ2 の
エネルギーとなるように紫外線を照射した後、２３℃、
６５％ＲＨの測定環境下に３０分間放置し、経時粘着力
（１）と同様にして１８０度引き剥がし粘着力を測定
し、これを経時粘着力（３）とした。I. Initial Adhesive Force The test piece was left in a measurement environment of 23 ° C. and 65% RH for 30 minutes, and then peeled 180 ° in accordance with JISZ0237 to measure the adhesive force, which was defined as the initial adhesive force. II. Adhesion over time (1) A test piece was placed in a gear oven, heated at 70 ° C. for 30 minutes, then left in a measurement environment of 23 ° C. and 65% RH for 30 minutes, and peeled 180 ° in accordance with JIS Z 0237. The adhesive force was measured, and this was defined as the adhesive force over time (1). III. Temporal Adhesive Strength (2) Except that the heating time was 90 ° C. for 30 minutes, the 180 ° peeling adhesive force was measured in the same manner as the temporal adhesive force (1), and this was referred to as the temporal adhesive force (2). did. IV. Adhesion over time (3) After irradiating the test piece with an ultraviolet ray so as to have an energy of 6660 mj / cm 2 by an ultraviolet ray irradiator, the test piece was heated at 23 ° C.
It was left for 30 minutes in a measurement environment of 65% RH, peeled 180 degrees in the same manner as the adhesive force with time (1), and the adhesive force was measured.
【００３１】Ｖ．被着体の汚染度 初期粘着力測定時に被着体として用いたポリカーボネー
ト板面の汚染の有無を目視により観察し、汚染無しを
○、汚染有りを×で表した。 VI．層間強度 上記Ｉ〜Ｖの測定時に被着体から引き剥がした表面保護
フィルムの基材フィルムと粘着剤層との界面における層
間剥離の有無を目視で観察し、層間強度を評価した。層
間剥離無しを○、層間剥離有りを×で示した。以上の結
果を表１に示した。V. Degree of contamination of adherend The presence or absence of contamination on the surface of the polycarbonate plate used as the adherend during the measurement of the initial adhesive strength was visually observed. VI. Interlayer strength The presence or absence of delamination at the interface between the base film of the surface protective film and the pressure-sensitive adhesive layer peeled from the adherend during the above measurements I to V was visually observed to evaluate the interlayer strength. No delamination was indicated by ○, and delamination was indicated by x. Table 1 shows the above results.
【００３２】[0032]
【表１】 ※１：被着体の端部から自然剥離が発生した。 ※２：粘着力が強すぎて測定時に表面保護フィルムがち
ぎれ、測定不能。[Table 1] * 1: Spontaneous peeling occurred from the end of the adherend. * 2: The surface protection film was torn off during measurement due to too strong adhesive force, and measurement was not possible.
【００３３】[0033]
【発明の効果】本発明の表面保護フィルムは以上の構成
であるから、被着体に対する適度の初期粘着力により被
着体によく密着し、又、厳しい加熱もしくは紫外線照射
の環境下に置かれても接着昂進が抑制され、用済み後に
は被着体から容易に剥離することができる。更に、被着
体が粘着剤によって汚染されることがないので光学用樹
脂板等に好適に用いることができる。As described above, the surface protective film of the present invention has the above-mentioned structure, so that it has good initial adhesion to the adherend and adheres well to the adherend, and can be placed in an environment of severe heating or ultraviolet irradiation. However, the increase in adhesion is suppressed, and it can be easily separated from the adherend after use. Furthermore, since the adherend is not contaminated by the adhesive, it can be suitably used for an optical resin plate or the like.
Claims (1)
面に、一般式Ａ−Ｂ−Ａで表されるブロック共重合体
（但し、Ａはスチレン系重合体ブロック、Ｂはブタジエ
ン重合体ブロックもしくはイソプレン重合体ブロック、
又はこれらの重合体をブタジエン重合体もしくはイソプ
レン重合体を水素添加して得られるオレフィン系重合体
ブロックを示す）３０〜７０重量％及びｎ−ペンタン抽
出法による抽出分が１．０重量％未満であるポリオレフ
ィン系樹脂７０〜３０重量％からなる粘着剤層が積層さ
れてなることを特徴とする表面保護フィルム。1. A block copolymer represented by the general formula ABA (where A is a styrene polymer block, B is a butadiene polymer block or Isoprene polymer block,
Or an olefin polymer block obtained by hydrogenating these polymers with a butadiene polymer or an isoprene polymer) in an amount of 30 to 70% by weight and an extractable content of less than 1.0% by weight using an n-pentane extraction method. A surface protective film comprising a pressure-sensitive adhesive layer comprising 70 to 30% by weight of a polyolefin-based resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP322098A JPH11199839A (en) | 1998-01-09 | 1998-01-09 | Surface-protection film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP322098A JPH11199839A (en) | 1998-01-09 | 1998-01-09 | Surface-protection film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11199839A true JPH11199839A (en) | 1999-07-27 |
Family
ID=11551364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP322098A Withdrawn JPH11199839A (en) | 1998-01-09 | 1998-01-09 | Surface-protection film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11199839A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167567A (en) * | 2000-12-01 | 2002-06-11 | Sekisui Chem Co Ltd | Surface-protecting film |
| JP2005290277A (en) * | 2004-04-02 | 2005-10-20 | Sun A Kaken Co Ltd | Surface-protection film |
| US8263713B2 (en) | 2009-10-13 | 2012-09-11 | Kraton Polymers U.S. Llc | Amine neutralized sulfonated block copolymers and method for making same |
| US8377514B2 (en) | 2008-05-09 | 2013-02-19 | Kraton Polymers Us Llc | Sulfonated block copolymer fluid composition for preparing membranes and membrane structures |
| US9365662B2 (en) | 2010-10-18 | 2016-06-14 | Kraton Polymers U.S. Llc | Method for producing a sulfonated block copolymer composition |
| US9394414B2 (en) | 2010-09-29 | 2016-07-19 | Kraton Polymers U.S. Llc | Elastic, moisture-vapor permeable films, their preparation and their use |
| US9429366B2 (en) | 2010-09-29 | 2016-08-30 | Kraton Polymers U.S. Llc | Energy recovery ventilation sulfonated block copolymer laminate membrane |
| US9861941B2 (en) | 2011-07-12 | 2018-01-09 | Kraton Polymers U.S. Llc | Modified sulfonated block copolymers and the preparation thereof |
| JP2018095873A (en) * | 2013-07-12 | 2018-06-21 | クレイトン・ポリマーズ・ユー・エス・エル・エル・シー | High flow, hydrogenated styrene-butadiene-styrene block copolymer and applications thereof |
-
1998
- 1998-01-09 JP JP322098A patent/JPH11199839A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167567A (en) * | 2000-12-01 | 2002-06-11 | Sekisui Chem Co Ltd | Surface-protecting film |
| JP2005290277A (en) * | 2004-04-02 | 2005-10-20 | Sun A Kaken Co Ltd | Surface-protection film |
| US8377514B2 (en) | 2008-05-09 | 2013-02-19 | Kraton Polymers Us Llc | Sulfonated block copolymer fluid composition for preparing membranes and membrane structures |
| US8263713B2 (en) | 2009-10-13 | 2012-09-11 | Kraton Polymers U.S. Llc | Amine neutralized sulfonated block copolymers and method for making same |
| US9394414B2 (en) | 2010-09-29 | 2016-07-19 | Kraton Polymers U.S. Llc | Elastic, moisture-vapor permeable films, their preparation and their use |
| US9429366B2 (en) | 2010-09-29 | 2016-08-30 | Kraton Polymers U.S. Llc | Energy recovery ventilation sulfonated block copolymer laminate membrane |
| US9365662B2 (en) | 2010-10-18 | 2016-06-14 | Kraton Polymers U.S. Llc | Method for producing a sulfonated block copolymer composition |
| US9861941B2 (en) | 2011-07-12 | 2018-01-09 | Kraton Polymers U.S. Llc | Modified sulfonated block copolymers and the preparation thereof |
| JP2018095873A (en) * | 2013-07-12 | 2018-06-21 | クレイトン・ポリマーズ・ユー・エス・エル・エル・シー | High flow, hydrogenated styrene-butadiene-styrene block copolymer and applications thereof |
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