JPH06336577A - Surface-protecting film - Google Patents
Surface-protecting filmInfo
- Publication number
- JPH06336577A JPH06336577A JP12709293A JP12709293A JPH06336577A JP H06336577 A JPH06336577 A JP H06336577A JP 12709293 A JP12709293 A JP 12709293A JP 12709293 A JP12709293 A JP 12709293A JP H06336577 A JPH06336577 A JP H06336577A
- Authority
- JP
- Japan
- Prior art keywords
- film
- weight
- adhesive
- parts
- number average
- 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
Description
【0001】[0001]
【産業上の利用分野】本発明は、軟質カラー鋼板等の塗
膜の保護用として使用される表面保護フイルムに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface protective film used for protecting a coating film such as a soft color steel plate.
【0002】[0002]
【従来の技術】最近、家電製品、建造物の内壁や外壁等
は、付加価値を高めるために複雑な加工を施される傾向
が強くなってきて、この目的に用いられるカラー鋼板等
の塗膜は、加工性を高めるために鉛筆硬度でHB以下の
柔軟なものが増加してきた。更に、消費者の好みが光沢
のあるものから梨地状のものへ移ったため、塗膜の平面
が平滑面から粗面に変化してきた。カラー鋼板の加工、
輸送、保管等における表面保護のために粘着フイルムを
使用しているが、前記した理由から塗膜が柔軟になった
ことによつて、極めて僅かな圧力でも温度や貼り付け時
間によって変形し、面粗さの変化による光沢変化や応力
のかかり易い気泡や見切り部等のエッジ部での変形によ
るフイルム貼り跡が発生し易くなった。2. Description of the Related Art Recently, there has been a strong tendency for household appliances, inner walls and outer walls of buildings to be subjected to complicated processing in order to increase added value, and coating films such as colored steel sheets used for this purpose. In order to improve workability, the number of flexible pencil hardnesses of HB or less has been increasing. Furthermore, the consumer preference has shifted from glossy to satin-like, and the flatness of the coating has changed from smooth to rough. Processing of colored steel sheets,
Although an adhesive film is used for surface protection during transportation, storage, etc., due to the softening of the coating film for the above-mentioned reasons, even slight pressure deforms due to temperature and application time, Changes in roughness due to changes in roughness, bubbles that tend to be stressed, and film sticking traces due to deformation at edge parts such as parting-off parts were more likely to occur.
【0003】[0003]
【発明が解決しようとする課題】表面保護フイルムは
紙、プラスチックフイルムに粘着剤を塗布したものが一
般的に用いられる。この粘着剤は感圧性接着剤とも呼ば
れる粘弾性体であるため、圧力や温度の影響を受け、時
間と共に変形していく。また、通常被着体の表面は数ミ
クロンから数十ミクロンの凹凸を有している。一方、表
面保護フイルムの貼り付けはロール圧着等の瞬間的加圧
下で行われるため、被着体との接触は微視的に見ると完
全ではなく、貼り付け後、経時と共に粘着剤の変形によ
り接触面積が増加し、接着力が上昇する。また、粘着剤
と被着体との水素結合等の分子間力或いは一次結合の形
成等によっても接着力が上昇する。そのため、用済みの
表面保護フイルムを剥離するとき、接着力の上昇が甚だ
しいと剥離が困難になったり、フイルムが切断したり、
糊残りが発生する。この現象は表面が粗面のもので特に
発生し易く対策が強く望まれてきた。本発明は、上記し
た問題を解消する表面保護フイルムを提供することを目
的とするものである。As the surface protection film, paper or plastic film coated with an adhesive is generally used. Since this pressure-sensitive adhesive is a viscoelastic body also called a pressure-sensitive adhesive, it is affected by pressure and temperature and deforms with time. Further, the surface of the adherend usually has irregularities of several microns to several tens of microns. On the other hand, since the surface protection film is attached under momentary pressure such as roll pressing, the contact with the adherend is not perfect when viewed microscopically. The contact area increases and the adhesive strength increases. Further, the adhesive force also increases due to intermolecular force such as hydrogen bond between the pressure-sensitive adhesive and the adherend or the formation of a primary bond. Therefore, when peeling off the used surface protection film, if the increase in adhesive strength is too great, peeling becomes difficult, the film is cut,
Adhesive residue occurs. This phenomenon is particularly likely to occur because the surface is rough, and countermeasures have been strongly desired. An object of the present invention is to provide a surface protection film that solves the above problems.
【0004】[0004]
【課題を解決するための手段】本発明者らは、上記問題
について鋭意研究を重ねた結果、本発明に到達したもの
である。本発明は、ポリイソブチレン、ブチルゴムまた
はポリブテンの何れか1種以上からなり、その数平均分
子量が150,000以下でかつ重量平均分子量と数平
均分子量との比が10以下である主成分100重量部に
対し、0.1〜10重量部の離型剤を添加した粘着剤
を、オレフィン系フイルムの支持体に塗布してなる表面
保護フイルムに関する。The present inventors have arrived at the present invention as a result of intensive research on the above problems. The present invention comprises 100 parts by weight of a main component which is made of any one or more of polyisobutylene, butyl rubber and polybutene and has a number average molecular weight of 150,000 or less and a ratio of the weight average molecular weight to the number average molecular weight of 10 or less. On the other hand, the present invention relates to a surface protective film obtained by applying an adhesive containing 0.1 to 10 parts by weight of a release agent onto a support of an olefin film.
【0005】ここで支持体として用いられるオレフィン
系フイルムとは、エチレン、プロピレン、ブテン等のα
−オレフィンのホモポリマーやコポリマー、更には酢酸
ビニル、メチルメタクリレート等のモノマーを共重合し
たものである。この中で価格の点からポリエチレンが好
ましい。また、支持体の耐候性、耐熱性、加工性及び作
業性の向上を目的として、酸化防止剤、紫外線吸収剤、
滑剤、可塑剤等を添加しても差し支えない。粘着剤の主
成分として用いられるポリイソブチレンとは、イソブチ
レンの重合体であり、ブチルゴムはイソブチレンとイソ
プレンとの共重合体であり、ポリブテンとはイソブチレ
ンと1−ブテン、n−ブテン等の構造異性体との共重合
体であり、更にカルボン酸基、水酸基等の架橋性官能基
を持ったモノマーを重合したり、塩素化したものが挙げ
られる。これらの中の1種又は混合物を用いる。The olefinic film used as the support here is an α, such as ethylene, propylene or butene.
-Olefin homopolymers and copolymers, and also copolymers of monomers such as vinyl acetate and methyl methacrylate. Of these, polyethylene is preferable from the viewpoint of price. Further, for the purpose of improving the weather resistance, heat resistance, processability and workability of the support, an antioxidant, an ultraviolet absorber,
A lubricant, a plasticizer or the like may be added. Polyisobutylene used as the main component of the pressure-sensitive adhesive is a polymer of isobutylene, butyl rubber is a copolymer of isobutylene and isoprene, and polybutene is a structural isomer such as isobutylene and 1-butene, n-butene. And a chlorinated product of a monomer having a crosslinkable functional group such as a carboxylic acid group or a hydroxyl group. One or a mixture of these is used.
【0006】分子量の測定方法は、高速液体クロマトグ
ラフ法、粘度法、超遠心法、光散乱法、膜浸透圧法、沸
点上昇法等があるが、高速液体クロマトグラフ法が簡便
であり、一般的な方法として広く用いられている。数平
均分子量(Mn)は下記の(1)式で、また重量平均分子
量(Mw)は下記の(2)式で表せるものである。式中、
Miは分子量及びNiは分子数を示す。The molecular weight can be measured by a high performance liquid chromatographic method, a viscosity method, an ultracentrifugation method, a light scattering method, a membrane osmotic pressure method, a boiling point elevation method, etc., but the high performance liquid chromatography method is simple and generally used. Is widely used as a new method. The number average molecular weight (Mn) can be represented by the following formula (1), and the weight average molecular weight (Mw) can be represented by the following formula (2). In the formula,
Mi represents the molecular weight and Ni represents the number of molecules.
【0007】[0007]
【数1】Mn=ΣMi・Ni/ΣNi…………(1)[Equation 1] Mn = ΣMi · Ni / ΣNi ………… (1)
【0008】[0008]
【数2】 Mw=ΣMi2・Ni/ΣMi・Ni………(2) この数平均分子量が150000を越えると保護フイル
ムの貼り付け跡が発生し易く、また150000以下で
あっても、重量平均分子量と数平均分子量との比が10
を越えると貼り付け跡が発生し易い。[Math 2] Mw = ΣMi 2 · Ni / ΣMi · Ni (2) If the number average molecular weight exceeds 150,000, traces of sticking of the protective film tend to occur, and even if it is 150,000 or less, the weight average The ratio between the molecular weight and the number average molecular weight is 10
If it exceeds, sticking marks are likely to occur.
【0009】離型剤としては、植物油脂、脂肪族石鹸、
シリコーン重合体、弗素樹脂、ワックス、アルキルカル
バメートのような長鎖アルキル基含有物等が挙げられ
る。特にシリコーン重合体がフイルム貼り跡の発生及び
接着力の経時的な上昇抑制の効果が大きく、好ましい。
シリコーン重合体としては、(Si-O-Si)で示されるシ
ロキサン結合を骨格とする各種分子量及び変性を行った
もので、ジメチルシリコーン、メチルフェニルシリコー
ンオイル等のストレートシリコーンオイル、ポリオキシ
アルキレンとのコポリマーやアミノ変性シリコーンのよ
うな変性シリコーンオイル、或いはこれらのエマルジョ
ン等が挙げられる。その添加量は、主成分100重量部
に対し0.1〜10重量部である。0.1重量部未満で
はフイルム貼り跡が残ったり、接着力の経時的な上昇抑
制の効果が得られず、10重量部を越えると離型剤によ
る接着力の低下或いは転着が著しく、好ましくない。As the release agent, vegetable oils and fats, aliphatic soaps,
Examples thereof include silicone polymers, fluororesins, waxes, and long-chain alkyl group-containing substances such as alkyl carbamates. In particular, a silicone polymer is preferable because it has a great effect of suppressing the generation of film sticking marks and the increase in the adhesive force with time.
The silicone polymer has various molecular weights and modifications having a siloxane bond represented by (Si-O-Si) as a skeleton, and is a straight silicone oil such as dimethyl silicone or methylphenyl silicone oil, and polyoxyalkylene. Examples thereof include copolymers, modified silicone oils such as amino-modified silicone, and emulsions thereof. The addition amount is 0.1 to 10 parts by weight with respect to 100 parts by weight of the main component. If the amount is less than 0.1 parts by weight, the film sticking traces remain and the effect of suppressing the increase in the adhesive force with time cannot be obtained, and if it exceeds 10 parts by weight, the adhesive force is significantly reduced or transferred by the release agent, which is preferable. Absent.
【0010】また、支持体には、粘着剤の付着を良好に
するために、あらかじめエチレン−酢酸ビニル共重合体
及び/又は塩素化ポリオレフィン樹脂からなるプライマ
を塗布しておくのが好ましい。エチレン−酢酸ビニル共
重合体は、通常のもののほかに二重結合やカルボン酸
基、水酸基等の架橋性官能基を持ったモノマーを共重合
しても構わない。塩素化ポリオレフィンは塩素化ポリエ
チレン、塩素化ポリプロピレン等が挙げられ、二重結合
やカルボン酸基、水酸基等の架橋性官能基を持ったモノ
マーを共重合しても差し支えない。本発明に用いられる
粘着剤は、上記成分のほかに粘着付与剤、軟化剤、耐候
性向上剤、着色剤等の一般的に配合される配合剤を添加
しても良い。Further, in order to improve the adhesion of the pressure-sensitive adhesive, it is preferable to previously coat the support with a primer comprising an ethylene-vinyl acetate copolymer and / or a chlorinated polyolefin resin. The ethylene-vinyl acetate copolymer may be copolymerized with a monomer having a double bond, a carboxylic acid group, a crosslinkable functional group such as a hydroxyl group, in addition to the usual one. Examples of the chlorinated polyolefin include chlorinated polyethylene and chlorinated polypropylene, and a monomer having a double bond or a crosslinkable functional group such as a carboxylic acid group and a hydroxyl group may be copolymerized. In addition to the above components, the pressure-sensitive adhesive used in the present invention may contain a commonly-used compounding agent such as a tackifier, a softening agent, a weather resistance improver and a colorant.
【0011】[0011]
【作用】ポリイソブチレン、ブチルゴム及びポリブテン
は極性が低く、化学的に安定な構造のため、接着力が上
昇し難く、良好な特性を有している。しかし、これだけ
では未だ接着力上昇の抑制は不十分であり、更に離型剤
を添加することで接着力の上昇が小さく、剥離性の良好
な表面保護フイルムを実現できる。また、主成分の分子
量を数平均分子量で150,000以下とし、粘着剤を
柔軟にすることで貼り付け跡の発生を抑えている。更に
離型剤を加えることで粘着剤と被着体との界面のずれを
大きくし、極性差により相互の物質移動を抑えること
も、貼り付け跡の発生を抑制する一因となっている。ま
た、エチレン−酢酸ビニル共重合体及び/又は塩素化ポ
リオレフィン樹脂を用いることにより、オレフィン系フ
イルムにも十分な投錨力を得ることができるので、安価
な粘着フイルムを提供することができる。[Function] Since polyisobutylene, butyl rubber and polybutene have low polarity and are chemically stable structure, the adhesive force is difficult to increase and they have good characteristics. However, this alone is still insufficient to suppress the increase in the adhesive strength, and the addition of a release agent can realize a surface protective film with a small increase in the adhesive strength and good peelability. Further, the number average molecular weight of the main component is set to 150,000 or less, and the adhesive is made flexible to suppress the occurrence of sticking marks. Further, the addition of a release agent increases the displacement of the interface between the pressure-sensitive adhesive and the adherend, and suppresses mutual mass transfer due to the difference in polarity, which is also a factor in suppressing the occurrence of sticking marks. Further, by using the ethylene-vinyl acetate copolymer and / or the chlorinated polyolefin resin, sufficient anchoring force can be obtained even for an olefin film, so that an inexpensive adhesive film can be provided.
【0012】[0012]
【実施例】次に本発明の実施例を説明するが、本発明は
この実施例によって制限を受けるものではない。 実施例1 コロナ処理を施した厚さ60μmのポリエチレンフイル
ムに、エチレン−酢酸ビニル共重合体(EV−550、
三井ポリケミカル製)50重量部、反応性エチレン−酢
酸ビニル共重合体(VR−103、三井ポリケミカル
製)50重量部、イソシアネート(スミジュールN、住
友バイウレタン製)1重量部からなるプライマを厚さが
0.1μmになるように塗布し、これに、ポリイソブチ
レン(オパノールB50、Mn86000、Mn/Mw
2.8、BASF製)100重量部にシリコーンオイル
(KF96、粘度1000cSt、信越シリコーン製)1
重量部を添加した粘着剤を厚さが5μmになるように塗
布して、表面保護フイルムを作製した。この試験結果を
表1に示す。EXAMPLES Examples of the present invention will now be described, but the present invention is not limited to these examples. Example 1 An ethylene-vinyl acetate copolymer (EV-550, was added to a 60 μm-thick polyethylene film subjected to corona treatment.
A primer comprising 50 parts by weight of Mitsui Polychemical, 50 parts by weight of a reactive ethylene-vinyl acetate copolymer (VR-103, manufactured by Mitsui Polychemical), and 1 part by weight of isocyanate (Sumijour N, manufactured by Sumitomo Biurethane). It is applied to a thickness of 0.1 μm, and polyisobutylene (Opanol B50, Mn 86000, Mn / Mw) is applied to this.
2.8, made by BASF) 100 parts by weight of silicone oil (KF96, viscosity 1000 cSt, made by Shin-Etsu Silicone) 1
A pressure-sensitive adhesive to which parts by weight were added was applied so as to have a thickness of 5 μm to prepare a surface protection film. The test results are shown in Table 1.
【0013】実施例2 シリコーンオイルを5重量部に増加した以外は、実施例
1と同様にして表面保護フイルムを作製した。この試験
結果を表1に示す。 比較例1 Mn658000、Mn/Mw1.7のポリイソブチレ
ンを用いた以外は、実施例2と同様にして表面保護フイ
ルムを作製した。この試験結果を表1に示す。 比較例2 Mn92000、Mn/Mw150のポリイソブチレン
を用いた以外は、実施例2と同様にして表面保護フイル
ムを作製した。この試験結果を表1に示す。Example 2 A surface protective film was produced in the same manner as in Example 1 except that the amount of silicone oil was increased to 5 parts by weight. The test results are shown in Table 1. Comparative Example 1 A surface protective film was produced in the same manner as in Example 2 except that polyisobutylene having Mn of 658000 and Mn / Mw of 1.7 was used. The test results are shown in Table 1. Comparative Example 2 A surface protective film was produced in the same manner as in Example 2 except that polyisobutylene of Mn92000 and Mn / Mw150 was used. The test results are shown in Table 1.
【0014】比較例3 シリコーンオイルを20重量部に増加した以外は、実施
例1と同様にして表面保護フイルムを作製した。この試
験結果を表1に示す。 比較例4 シリコーンオイルを使用しない以外は、実施例1と同様
にして表面保護フイルムを作製した。この試験結果を表
1に示す。Comparative Example 3 A surface protective film was produced in the same manner as in Example 1 except that the amount of silicone oil was increased to 20 parts by weight. The test results are shown in Table 1. Comparative Example 4 A surface protective film was produced in the same manner as in Example 1 except that silicone oil was not used. The test results are shown in Table 1.
【0015】試験条件 ポリエステル系カラー鋼板(日本鋼管製、鉛筆硬度:
B)に実施例及び比較例で得た表面保護フイルムを被着
した後、80℃に1日加熱処理した。被着直後及び加熱
処理後の接着力を測定した。即ち、室温20℃、湿度6
5%において、幅25mmのフイルムの端部を180度の
方向に折り返し、毎分300mmの速度で引っ張って剥離
したときの荷重(g)を求めた。Test conditions Polyester color steel sheet (made by Nippon Steel Tube, pencil hardness:
The surface protective films obtained in Examples and Comparative Examples were applied to B), and then heat-treated at 80 ° C. for 1 day. The adhesive force was measured immediately after application and after heat treatment. That is, room temperature 20 ° C, humidity 6
At 5%, the edge of the film having a width of 25 mm was folded back in the direction of 180 degrees, and the load (g) when peeled by pulling at a speed of 300 mm per minute was obtained.
【0016】[0016]
【表1】 注)加熱後の表面状態は、〇:良好、A:粘着フイルム
の貼り付け跡発生、B:くもり発生(程度:大)、C:
くもり発生(程度:小)である。[Table 1] Note) Surface condition after heating is ◯: Good, A: Adhesive film sticking marks occur, B: Cloudy (extent: large), C:
Cloudy weather (degree: small).
【0017】表1から、実施例のものは比較例のものに
比べて被着前後の接着力の差が小さく(接着力の変化が
小さく)、剥離性に優れていることが示される。Table 1 shows that the example has a smaller difference in the adhesive force before and after the deposition (the change in the adhesive force is smaller) than that of the comparative example, and is excellent in peelability.
【0018】[0018]
【発明の効果】本発明の表面保護フイルムは、塗膜の変
形により発生する光沢変化、或いは気泡跡や見切り跡の
ようなフイルムの貼り付け跡が生じ難い上に、接着力の
経時変化が小さく、剥離性に優れるものである。EFFECTS OF THE INVENTION The surface protective film of the present invention is less likely to cause a gloss change caused by the deformation of a coating film or a film sticking mark such as a bubble mark or a cut-off mark, and has a small change in adhesive force with time. It has excellent releasability.
Claims (3)
リブテンの何れか1種以上からなり、その数平均分子量
が150,000以下でかつ重量平均分子量と数平均分
子量との比が10以下である主成分100重量部に対
し、0.1〜10重量部の離型剤を添加した粘着剤を、
オレフィン系フイルムの支持体に塗布してなる表面保護
フイルム。1. A main component of 100 parts by weight which is composed of one or more of polyisobutylene, butyl rubber and polybutene and has a number average molecular weight of 150,000 or less and a ratio of the weight average molecular weight to the number average molecular weight of 10 or less. To 10 parts by weight of the pressure-sensitive adhesive containing a release agent of 0.1 to 10 parts by weight,
A surface protection film formed by coating an olefin film support.
載の表面保護フイルム。2. The surface protective film according to claim 1, wherein the release agent comprises silicone.
あり、エチレン−酢酸ビニル共重合体及び/又は塩素化
ポリオレフィン樹脂をプライマとする請求項1記載の表
面保護フイルム。3. The surface protective film according to claim 1, wherein the olefin-based film is polyethylene, and an ethylene-vinyl acetate copolymer and / or a chlorinated polyolefin resin is used as a primer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12709293A JPH06336577A (en) | 1993-05-28 | 1993-05-28 | Surface-protecting film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12709293A JPH06336577A (en) | 1993-05-28 | 1993-05-28 | Surface-protecting film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06336577A true JPH06336577A (en) | 1994-12-06 |
Family
ID=14951386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12709293A Pending JPH06336577A (en) | 1993-05-28 | 1993-05-28 | Surface-protecting film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06336577A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999023186A1 (en) * | 1997-10-31 | 1999-05-14 | Nichiban Company Limited | Surface-protective pressure-sensitive adhesive sheet and pressure-sensitive adhesive composition for surface-protective pressure-sensitive adhesive sheet |
WO2009113351A1 (en) * | 2008-03-12 | 2009-09-17 | 日東電工株式会社 | Edgde-fixing tape and use thereof |
JP2009242762A (en) * | 2008-04-01 | 2009-10-22 | Nitto Denko Corp | Coating film protective sheet |
JP2009242763A (en) * | 2008-04-01 | 2009-10-22 | Nitto Denko Corp | Coating film protective sheet |
-
1993
- 1993-05-28 JP JP12709293A patent/JPH06336577A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999023186A1 (en) * | 1997-10-31 | 1999-05-14 | Nichiban Company Limited | Surface-protective pressure-sensitive adhesive sheet and pressure-sensitive adhesive composition for surface-protective pressure-sensitive adhesive sheet |
US6274235B1 (en) | 1997-10-31 | 2001-08-14 | Nichiban Company Limited | Surface-protective pressure-sensitive adhesive sheet and pressure-sensitive adhesive composition for surface-protective pressure-sensitive adhesive sheet |
WO2009113351A1 (en) * | 2008-03-12 | 2009-09-17 | 日東電工株式会社 | Edgde-fixing tape and use thereof |
JP2009215489A (en) * | 2008-03-12 | 2009-09-24 | Nitto Denko Corp | Edge sealing tape and its use |
JP2009242762A (en) * | 2008-04-01 | 2009-10-22 | Nitto Denko Corp | Coating film protective sheet |
JP2009242763A (en) * | 2008-04-01 | 2009-10-22 | Nitto Denko Corp | Coating film protective sheet |
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