JPH09241595A - Surface protective film - Google Patents
Surface protective filmInfo
- Publication number
- JPH09241595A JPH09241595A JP8047229A JP4722996A JPH09241595A JP H09241595 A JPH09241595 A JP H09241595A JP 8047229 A JP8047229 A JP 8047229A JP 4722996 A JP4722996 A JP 4722996A JP H09241595 A JPH09241595 A JP H09241595A
- Authority
- JP
- Japan
- Prior art keywords
- polymer block
- pressure
- adhesive layer
- sensitive adhesive
- surface protective
- 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
- 230000001681 protective effect Effects 0.000 title abstract description 30
- 239000010410 layer Substances 0.000 claims abstract description 27
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 26
- 230000000740 bleeding effect Effects 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920000642 polymer Polymers 0.000 claims abstract description 13
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims abstract description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 229920001400 block copolymer Polymers 0.000 claims abstract description 8
- 229920000098 polyolefin Polymers 0.000 claims abstract description 6
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 6
- 229920002587 poly(1,3-butadiene) polymer Polymers 0.000 claims abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 28
- 230000001070 adhesive effect Effects 0.000 abstract description 28
- 239000000758 substrate Substances 0.000 abstract description 5
- 238000005984 hydrogenation reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 229920002873 Polyethylenimine Polymers 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- QWDQYHPOSSHSAW-UHFFFAOYSA-N 1-isocyanatooctadecane Chemical compound CCCCCCCCCCCCCCCCCCN=C=O QWDQYHPOSSHSAW-UHFFFAOYSA-N 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 3
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 2
- YBYIRNPNPLQARY-UHFFFAOYSA-N 1H-indene Chemical compound C1=CC=C2CC=CC2=C1 YBYIRNPNPLQARY-UHFFFAOYSA-N 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 229920002633 Kraton (polymer) Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- -1 alkyl isocyanate Chemical class 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N butadiene group Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000001841 imino group Chemical group [H]N=* 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、合成樹脂板、化粧
合板、金属板、塗装鋼板などの表面に仮着し、塵の付着
や傷つきがないように、その表面を保護するのに使用す
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 used for temporarily adhering to a surface of a synthetic resin plate, a decorative plywood, a metal plate, a coated steel plate, etc., and protecting the surface so that dust is not attached or scratched. The present invention relates to a surface protection film.
【０００２】[0002]
【従来の技術】合成樹脂板、化粧合板、金属板、塗装鋼
板などの表面保護、即ち、を加工時や搬送時に傷付きや
汚れを防止するために表面保護フィルムが賞用されてい
る。表面保護フィルムは、熱可塑性樹脂や紙からなる基
材層の片面に粘着層が形成された構造であり、適度の粘
着力（仮着性）を有するとともに、使用後に各種被着体
の表面を粘着剤で汚染することなく容易に剥がすことが
できなければならない。2. Description of the Related Art Surface protective films have been widely used for surface protection of synthetic resin plates, decorative plywood, metal plates, coated steel plates, etc., that is, for preventing scratches and stains during processing and transportation. The surface protection film has a structure in which an adhesive layer is formed on one side of a base material layer made of thermoplastic resin or paper, has an appropriate adhesive force (temporary adhesion), and protects the surface of various adherends after use. It should be easy to remove without contamination with adhesive.
【０００３】この種の表面保護フィルムとして、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、イソプレン重合体ブロック、またはそれらを水素添
加して得られるオレフィン重合体ブロックである）を主
成分とし、これに粘着付与樹脂と、脂肪酸アミド、ポリ
エチレンイミンアルキルカルバミド及びポリビニルアル
コールアルキルカルバミドの群から選ばれるブリード性
添加剤とが配合された粘着剤層が、ポリオレフィン樹脂
からなる基材フィルムの片面に積層されてなる表面保護
フィルムが提案されている（特願平６−１４６４００
号）。As this type of surface protective film, a block copolymer represented by the general formula A-B-A (where A is a styrene polymer block, B is a butadiene polymer block, an isoprene polymer block, or The main component is an olefin polymer block obtained by hydrogenating them, and a tackifying resin and a bleeding additive selected from the group consisting of fatty acid amide, polyethyleneimine alkylcarbamide and polyvinyl alcohol alkylcarbamide A surface protective film has been proposed in which the blended pressure-sensitive adhesive layer is laminated on one side of a base film made of a polyolefin resin (Japanese Patent Application No. 6-146400).
issue).
【０００４】このものは、表面保護フィルムを溶融成膜
時の高温、製品をロール状巻物やシート状で保管中、及
び被着体に貼り付けた後で、粘着剤中のブリード性添加
剤が粘着剤からブリードすることにより接着昂進を抑
え、被着体から表面保護フィルムを剥がす際に糊残りや
粘着剤による汚染がなく、容易に剥がすことができると
するものである。This is because the bleeding additive in the pressure-sensitive adhesive is removed after the surface protection film is melted and deposited at a high temperature, the product is stored in a roll or a roll, and after being adhered to an adherend. The bleeding from the pressure-sensitive adhesive suppresses the progress of adhesion, and when the surface protective film is peeled off from the adherend, there is no adhesive residue or contamination by the pressure-sensitive adhesive, and it can be easily peeled off.
【０００５】また、特開平７−８９４６８号公報には、
表面保護フィルムに設けられた粘着剤層に凹凸を設け、
曲面形状の被着体に貼付される際に表面保護フィルムと
被着体との間に入る空気が抜け易くてされたものが記載
されている。Further, in Japanese Patent Laid-Open No. 7-89468,
Providing unevenness on the adhesive layer provided on the surface protection film,
It is described that the air entering between the surface protective film and the adherend can be easily released when it is attached to the adherend having a curved shape.
【０００６】[0006]
【発明が解決しようとする課題】上記特願平６−１４６
４００号で提案されているものは、製造された表面保護
フィルムをロール状巻物又はシート状で積層して保管す
る際、粘着剤層とこれに重なる基材フィルムとの界面に
部分的に気泡が巻き込まれていると、その部分だけがブ
リード性添加剤のブリードが促進されて表面の濃度が高
くなり、その部分の粘着力が特に低下して被着体に貼り
付けたとき、浮き上がりや剥離が発生するという問題が
ある。[Patent Document 1] Japanese Patent Application No. 6-146
What is proposed in No. 400 is that when the manufactured surface protection film is laminated and stored in a roll-shaped roll or a sheet form, air bubbles are partially generated at the interface between the pressure-sensitive adhesive layer and the base film overlapping with the pressure-sensitive adhesive layer. When entangled, bleeding of the bleeding additive is promoted only in that part and the surface concentration becomes high, and the adhesive strength of that part is particularly reduced, and when it is attached to an adherend, it does not rise or peel off. There is a problem that it occurs.
【０００７】気泡の巻き込みを防止する方法として、表
面保護フィルムの製造時に、ロール状巻物とする場合は
巻取り部で、シート状積層物とする場合は積層するとき
にゴムロール等で押さえればよいと考えられる。しか
し、通常の押さえ圧力では気泡の巻き込みを防止するこ
とはできず、過度に圧力を与えるとフィルムの厚みの大
きい部分が過度に押さえられ、フィルムが部分的に伸び
るという問題がある。As a method for preventing the entrapment of air bubbles, it is sufficient to press the surface protective film with a roll when producing a roll-shaped roll, or with a rubber roll or the like when laminating a sheet-like laminate. Conceivable. However, it is not possible to prevent air bubbles from being entrapped by a normal pressing pressure, and if excessive pressure is applied, there is a problem that a portion having a large thickness of the film is excessively pressed and the film is partially stretched.
【０００８】また、特開平７−８９４６８号公報に記載
のものは、表面保護フィルムと被着体との界面の空気が
抜け易くすることを目的とし、粘着力の低下を防止する
という手段ではない。Further, the one disclosed in Japanese Patent Application Laid-Open No. 7-89468 is intended to make it easier for air to escape at the interface between the surface protective film and the adherend, and is not a means for preventing a decrease in adhesive strength. .
【０００９】本発明は上記従来の問題点を解消し、製造
された表面保護フィルムをロール状巻物又はシート状で
積層して保管しても、部分的に粘着力が低下することが
なく、被着体に貼り付けて使用した後に剥がしても被着
体に糊残りせず容易に剥離することができる表面保護フ
ィルムを提供することを目的とする。The present invention solves the above-mentioned conventional problems, and even when the manufactured surface protective film is laminated and stored in the form of a roll or a sheet, the adhesive strength is not partially lowered and the surface protection film is not covered. An object of the present invention is to provide a surface protective film which can be easily peeled off without leaving an adhesive residue on an adherend even after being peeled off after being attached to an adherend.
【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、ポリオレフィン樹脂からなる基材フィルムの片面
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、イソプレン重合体ブロック、またはそれ
らを水素添加して得られるオレフィン重合体ブロックで
ある）を主成分とし、これに粘着付与樹脂と、ブリード
性添加剤とが配合された粘着剤層が積層されてなる表面
保護フィルムにおいて、粘着剤層又は基材フィルムの露
出したいずれかの表面に凹凸が設けられてなることを特
徴とするものである。The surface protective film of the present invention comprises a block copolymer represented by the general formula ABA on one side of a base film made of a polyolefin resin (where A is a styrene type). The polymer block, B is a butadiene polymer block, an isoprene polymer block, or an olefin polymer block obtained by hydrogenating them) as a main component, and a tackifying resin and a bleeding additive are added to this. A surface protective film obtained by laminating a compounded pressure-sensitive adhesive layer, characterized in that the pressure-sensitive adhesive layer or the substrate film is provided with irregularities on either exposed surface.
【００１１】本発明で使用されるポリオレフィン系の樹
脂としては、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、線状低密度ポリエチレン、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−エチルアクリレート共重合
体、エチレン−酢酸ビニル共重合体、エチレン−メチル
メタクリレート共重合体、エチレン−ｎブチルアクリレ
ート共重合体、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）等が挙げられる。
又、上記のものの任意の組合せによる混合物も使用でき
る。The polyolefin resin used in the present invention includes low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-α olefin copolymer, propylene-α olefin copolymer, Examples thereof include ethylene-ethyl acrylate copolymer, ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, ethylene-n-butyl acrylate copolymer, polypropylene (homopolymer, random copolymer, block copolymer).
It is also possible to use mixtures of any of the above.
【００１２】粘着剤の主成分である一般式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、イソプレ
ン重合体ブロック、またはそれらを水素添加して得られ
るオレフィン重合体ブロックである）には、副成分とし
て一般式Ａ−Ｂで表されるブロック共重合体が含まれて
もよい。A block copolymer represented by the general formula A-B-A which is the main component of the adhesive (where A is a styrene polymer block, B is a butadiene polymer block, isoprene polymer block, or those Is an olefin polymer block obtained by hydrogenation of) may contain a block copolymer represented by the general formula AB as a subcomponent.
【００１３】本発明で使用される粘着付与樹脂は、例え
ば、脂肪族系石油樹脂、テルペン樹脂、クマロン・イン
デン樹脂、芳香族系石油樹脂、ロジン樹脂、脂環族系石
油樹脂等が好適に用いられる。粘着付与樹脂の添加量は
１２０重量部を超えると粘着剤層の凝集力がなくなり、
被着体に糊残りするので１２０重量部以下とする。好ま
しくは１０〜１００重量部、さらに好ましくは１０〜６
０重量部である。As the tackifying resin used in the present invention, for example, aliphatic petroleum resin, terpene resin, coumarone / indene resin, aromatic petroleum resin, rosin resin, alicyclic petroleum resin, etc. are preferably used. To be When the addition amount of the tackifying resin exceeds 120 parts by weight, the cohesive force of the pressure-sensitive adhesive layer is lost,
Since the adhesive remains on the adherend, the amount is 120 parts by weight or less. Preferably 10 to 100 parts by weight, more preferably 10 to 6
0 parts by weight.
【００１４】ブリード性添加剤とは、表面保護フィルム
を被着体に貼り付けて剥がすまでの間の接着昂進を抑制
するために添加するものであり、長鎖アルキル基の導入
されたポリエチレンイミンやポリビニルアルコール、脂
肪酸アミド類が挙げられ、これらは単独または複数の組
合せで併用してもよい。The bleeding additive is added in order to suppress the progress of adhesion until the surface protective film is attached to the adherend and peeled off, such as polyethyleneimine having a long-chain alkyl group introduced or Examples thereof include polyvinyl alcohol and fatty acid amides, which may be used alone or in combination of two or more.
【００１５】長鎖アルキル基の導入されたポリエチレン
イミンやポリビニルアルコールは数平均分子量が１，０
００〜１００，０００の範囲であることが好ましい。数
平均分子量が１，０００未満ではブリード性が高すぎて
粘着力が低下するばかりで接着昂進の抑制効果がなく、
数平均分子量が１００，０００以上のものはブリード性
が低く、接着昂進の抑制効果がない。付加されるアルキ
ル基の炭素数は８以上のものが好ましく、７以下のもの
ではブリード性が低く、接着昂進の抑制効果がない。Polyethyleneimine or polyvinyl alcohol having a long-chain alkyl group introduced has a number average molecular weight of 1,0.
It is preferably in the range of 00 to 100,000. When the number average molecular weight is less than 1,000, the bleeding property is too high and the adhesive strength is not only reduced, but there is no effect of suppressing the adhesion promotion.
When the number average molecular weight is 100,000 or more, the bleeding property is low and the effect of suppressing the adhesion promotion is not obtained. The number of carbon atoms of the added alkyl group is preferably 8 or more, and when it is 7 or less, the bleeding property is low and the effect of suppressing the adhesion promotion is not obtained.
【００１６】ポリエチレンイミンのイミノ基又はポリビ
ニルアルコールの水酸基に付加される長鎖アルキル基の
付加率は５０モル％以上のものが好ましい。５０モル％
未満ではブリード性が低く、接着昂進の抑制効果がな
い。The addition ratio of the long-chain alkyl group added to the imino group of polyethyleneimine or the hydroxyl group of polyvinyl alcohol is preferably 50 mol% or more. 50 mol%
If it is less than the above range, the bleeding property is low and there is no effect of suppressing adhesion promotion.
【００１７】脂肪酸アミドとしては、分子量が１，００
０以下で融点が１８０℃以下のものが好ましい。分子量
が１，０００を超えるとブリード性が低く、接着昂進の
抑制効果がない。融点が１８０℃を超えると押出し成形
時の熱では溶融しないのでブリード性がなく、接着昂進
の抑制効果がない。The fatty acid amide has a molecular weight of 1,00.
It is preferably 0 or less and a melting point of 180 ° C. or less. When the molecular weight exceeds 1,000, the bleeding property is low and the effect of suppressing the adhesion promotion is not obtained. When the melting point is higher than 180 ° C., it is not melted by the heat during extrusion molding, so that there is no bleeding property and there is no effect of suppressing the progress of adhesion.
【００１８】ブリード性添加剤の添加量は概ね０．１〜
５重量％の範囲であることが好ましい。０．１重量％未
満ではブリード量が不足し、接着昂進の抑制効果がな
い。また、５重量％を超えるとブリード量が過剰とな
り、粘着力の低下を招くことになる。The addition amount of the bleeding additive is about 0.1.
It is preferably in the range of 5% by weight. If it is less than 0.1% by weight, the amount of bleeding will be insufficient, and the effect of suppressing adhesion promotion will not be obtained. On the other hand, if it exceeds 5% by weight, the amount of bleeding becomes excessive and the adhesive strength is lowered.
【００１９】本発明において使用される上記基材層、粘
着剤層には、更に必要に応じて、紫外線吸収剤、酸化防
止剤、着色顔料等が添加されてもよい。If necessary, an ultraviolet absorber, an antioxidant, a color pigment, etc. may be added to the above-mentioned base material layer and pressure-sensitive adhesive layer used in the present invention.
【００２０】本発明において、基材フィルムに粘着剤層
を積層する方法は特に限定しないが、共押出成形による
方法が製造装置及び製造工程が簡単であり、積層強度が
高く、製造能率もよいので好ましい。In the present invention, the method for laminating the pressure-sensitive adhesive layer on the substrate film is not particularly limited, but the method by coextrusion molding has a simple manufacturing apparatus and manufacturing process, and has high lamination strength and high manufacturing efficiency. preferable.
【００２１】本発明では、基材フィルムに粘着剤層が積
層された表面保護フィルムの露出した基材フィルムもし
くは粘着剤層の表面に凹凸が設けられる。凹凸を設ける
手段としては、溶融または半溶融状態で凹凸のついたロ
ールに押し当てる方法や、成膜時の条件（温度、溶融粘
度、層比、ライン速度、リップクリアランス等）により
メルトフラクチャーのような流動特性を利用して凹凸を
つける方法を用いることもできる。In the present invention, irregularities are provided on the exposed surface of the base film or the pressure-sensitive adhesive layer of the surface protective film in which the pressure-sensitive adhesive layer is laminated on the base film. As a means for providing unevenness, a method of pressing in a molten or semi-molten state on a roller having unevenness or a melt fracture depending on the conditions (temperature, melt viscosity, layer ratio, line speed, lip clearance, etc.) during film formation It is also possible to use a method of making unevenness by utilizing various flow characteristics.
【００２２】凹凸の形状は、該表面保護フィルムをロー
ル状巻物又はシート状積層物とした状態で、直径が２ｍ
ｍ以下の大きさである気泡が均一に入る程度のものが好
ましい。気泡の大きさが２ｍｍよりも大きいと、その部
分の粘着力低下の影響が大きく、被着体からの浮き上が
りや剥離が発生し易くなる。The uneven shape has a diameter of 2 m when the surface protective film is in the form of a roll or a sheet laminate.
It is preferable that air bubbles having a size of m or less can uniformly enter. If the size of the bubbles is larger than 2 mm, the effect of the decrease in the adhesive strength at that portion is large, and the bubbles are easily lifted or peeled from the adherend.
【００２３】（作用）本発明は、ポリオレフィン樹脂か
らなる基材フィルムの片面に、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、イソプレン重
合体ブロック、またはそれらを水素添加して得られるオ
レフィン重合体ブロックである）を主成分とし、これに
粘着付与樹脂と、ブリード性添加剤とが配合された粘着
剤層が積層されてなる表面保護フィルムであり、粘着剤
層又は基材フィルムの露出したいずれかの表面に凹凸が
設けられてなるので、この表面保護フィルムをロール状
の巻物やシート状の積層物として保管しても重ねられた
界面の一部に気泡が集中せず、ブリード性添加剤のブリ
ード状態が均一に分散される。そのため全体に平均した
剥離性が得られ、又、被着体から剥離したとき糊残りな
く剥離することができる。(Function) In the present invention, a block copolymer represented by the general formula A-B-A (where A is a styrene polymer block and B is butadiene) is provided on one side of a base film made of a polyolefin resin. Polymer block, isoprene polymer block, or an olefin polymer block obtained by hydrogenating them) as a main component, and a tackifier resin, and a pressure-sensitive adhesive layer containing a bleeding additive It is a surface protective film that is laminated, and since unevenness is provided on either the exposed surface of the pressure-sensitive adhesive layer or the base film, this surface protective film is stored as a roll-shaped roll or a sheet-shaped laminate. However, air bubbles do not concentrate on a part of the superposed interfaces, and the bleeding state of the bleeding additive is uniformly dispersed. Therefore, the average releasability is obtained as a whole, and when peeled from the adherend, it can be peeled without leaving any adhesive residue.
【００２４】[0024]
【発明の実施の形態】以下に本発明表面保護フィルムの
実施例を説明する。 （実施例１）粘着剤層としてスチレン−ブタジエン−ス
チレンブロック共重合体の水素添加物（ＳＥＢＳ）（シ
ェル化学社製 商品名：クレイトンＧ１６５７）１００
重量部に粘着付与樹脂（ト−ネックス社製、商品名：エ
スコレッツ５３００）１０重量部、ポリエチレンイミン
のオクタデシルイソシアネート付加物（日本触媒社製，
商品名「ＲＰ２０」，分子量１０，０００，アルキルイ
ソシアネート付加率７５モル％）１．５重量部を配合し
たものを金型温度１８０℃で厚み１０μｍで、基材フィ
ルムとして低密度ポリエチレン（三井石油化学社製，商
品名「ミラソン１２」，ＭＦＲ３．０）を厚み５０μｍ
で２層共押出成形により成膜し、エンボスロールを通過
させて粘着剤層面に凹凸を設けてロール状に巻き取っ
た。Embodiments of the surface protective film of the present invention will be described below. (Example 1) Hydrogenated substance of styrene-butadiene-styrene block copolymer (SEBS) as a pressure-sensitive adhesive layer (manufactured by Shell Chemical Co., Ltd .: trade name: Kraton G1657) 100
10 parts by weight of a tackifying resin (manufactured by Tonex Corporation, trade name: Escoletz 5300), octadecyl isocyanate adduct of polyethyleneimine (manufactured by Nippon Shokubai Co., Ltd.,
Product name "RP20", molecular weight 10,000, alkyl isocyanate addition ratio 75 mol%) 1.5 parts by weight is mixed with a mold temperature of 180 ° C and a thickness of 10 µm, and a low-density polyethylene (Mitsui Petrochemical Co., Ltd.) is used as a base film. Made by the company, product name "Mirason 12", MFR 3.0) thickness 50 μm
Then, a film was formed by two-layer coextrusion molding, passed through an embossing roll to form irregularities on the pressure-sensitive adhesive layer surface, and wound into a roll shape.
【００２５】（実施例２）粘着剤のポリエチレンイミン
のオクタデシルイソシアネート付加物の代わりに、エチ
レンビスステアリルアミド（日本油脂社製，商品名「ア
ルフローＨ５０ＴＦ」，分子量５９２，融点１４３℃）
１．５重量部配合した以外は実施例１と同様にして表面
保護フィルムを得た。(Example 2) Instead of the octadecyl isocyanate adduct of polyethyleneimine as an adhesive, ethylenebisstearylamide (trade name "Alflo H50TF" manufactured by NOF CORPORATION, molecular weight 592, melting point 143 ° C)
A surface protective film was obtained in the same manner as in Example 1 except that 1.5 parts by weight was compounded.
【００２６】（実施例３）エンボスロールによる凹凸を
粘着剤層面でなく基材フィルムに設けた以外は実施例１
と同様にして表面保護フィルムを得た。(Example 3) Example 1 except that unevenness due to an embossing roll was provided on the base film instead of on the surface of the pressure-sensitive adhesive layer.
A surface protective film was obtained in the same manner as.
【００２７】（実施例４）基材フィルムの材料を線状低
密度ポリエチレン（三井石油化学社製，商品名「ウルト
ゼックス２０２１Ｌ」，ＭＦＲ２．１）とし、粘着剤層
にメルトフラクチャーによる凹凸を設けた以外は実施例
１と同様にして表面保護フィルムを得た。Example 4 A linear low density polyethylene (manufactured by Mitsui Petrochemical Co., Ltd., trade name "Ultzex 2021L", MFR2.1) was used as the material of the base film, and the adhesive layer was provided with irregularities due to melt fracture. A surface protective film was obtained in the same manner as in Example 1 except for the above.
【００２８】（実施例５）粘着剤としてスチレン−ブタ
ジエン−スチレンブロック共重合体の水素添加物（ＳＥ
ＢＳ）（シェル化学社製 商品名：クレイトンＧ１６５
７）１００重量部に粘着付与樹脂（ト−ネックス社製、
商品名：エスコレッツ５３００）１０重量部、粘着剤粘
度調整剤（理化ハーキュレス社製，商品名「エンデック
ス１５５」）２０重量部、ポリエチレンイミンのオクタ
デシルイソシアネート付加物（日本触媒社製，商品名
「ＲＰ２０」，分子量１０，０００，アルキルイソシア
ネート付加率７５モル％）１．５重量部を配合したもの
とし、粘着剤層面にメルトフラクチャーによる凹凸を設
けた以外は実施例１と同様にして表面保護フィルムを得
た。(Example 5) Hydrogenated product of styrene-butadiene-styrene block copolymer (SE
BS) (Shell Chemical Co., Ltd. product name: Kraton G165
7) 100 parts by weight of tackifying resin (manufactured by Tonex Corporation,
Product name: Escolettes 5300) 10 parts by weight, adhesive viscosity modifier (Rika Hercules, trade name "Endex 155") 20 parts by weight, octadecyl isocyanate adduct of polyethyleneimine (Nippon Shokubai Co., trade name "RP20" , Molecular weight 10,000, alkyl isocyanate addition rate 75 mol%) 1.5 parts by weight, and a surface protective film was prepared in the same manner as in Example 1 except that unevenness due to melt fracture was provided on the pressure-sensitive adhesive layer surface. Obtained.
【００２９】（比較例１）粘着剤層面にエンボスロール
による凹凸を設けない以外は実施例１と同様にして表面
保護フィルムを得た。このものはメルトフラクチャーに
よる凹凸もなく、基材フィルム、粘着剤層とも平滑な表
面であった。(Comparative Example 1) A surface protective film was obtained in the same manner as in Example 1 except that the surface of the pressure-sensitive adhesive layer was not embossed. This product had no irregularities due to melt fracture, and both the base film and the adhesive layer had smooth surfaces.
【００３０】上記実施例１〜５及び比較例１で得た表面
保護フィルムをロール状巻物とし、これの気泡巻き込み
の有無、初期粘着力（製造３日後）、経時粘着力（初期
粘着力測定後４０℃で２週間後）を下記の方法で評価し
た。その結果を表１に示す。 （１）気泡巻き込みの有無 表面保護フィルム１ｍ2 について直径５ｍｍ以上の気泡
の有無を目視で観察した。 （２）初期粘着力 表面保護フィルムの製造３日後に、ステンレス板（＃３
０４ＢＡ）を被着体としてＪＩＳ Ｚ−０２３７に準じ
て１８０度剥離力を測定した。 （３）経時粘着力 初期粘着力を測定した表面保護フィルムを４０℃で２週
間保管した後、初期粘着力と同様にして１８０度剥離力
を測定した。The surface protective films obtained in Examples 1 to 5 and Comparative Example 1 were used as rolls, and the presence or absence of bubble entrainment, initial adhesive strength (three days after production), and adhesive strength with time (after measuring initial adhesive strength) After 2 weeks at 40 ° C.) was evaluated by the following method. Table 1 shows the results. (1) Presence / absence of air bubbles The presence / absence of air bubbles having a diameter of 5 mm or more was visually observed for 1 m 2 of the surface protection film. (2) Initial adhesive strength Three days after the production of the surface protective film, the stainless steel plate (# 3
No. 04BA) was used as the adherend, and the 180-degree peeling force was measured according to JIS Z-0237. (3) Adhesive strength with time The surface protective film whose initial adhesive strength was measured was stored at 40 ° C. for 2 weeks, and then the 180-degree peel strength was measured in the same manner as the initial adhesive strength.
【００３１】[0031]
【表１】 [Table 1]
【００３２】表１から明らかなように、実施例１〜５の
ものは基材フィルム又は粘着剤層に凹凸が設けられてい
るので目視できる気泡はなく、経時粘着力の低下も少な
いが、比較例のものは凹凸がないので気泡が発生し、そ
の周辺で経時的に粘着力が著しく低下した。As can be seen from Table 1, in Examples 1 to 5, since the base film or the pressure-sensitive adhesive layer is provided with irregularities, there are no visible bubbles, and the decrease in the adhesive strength with time is small. In the case of the example, there was no unevenness, so bubbles were generated, and the adhesive strength significantly decreased with time in the vicinity thereof.
【００３３】[0033]
【発明の効果】本発明表面保護フィルムの構成は以上の
とおりであり、製造された表面保護フィルムをロール状
巻物又はシート状で積層して保管しても、部分的に粘着
力が低下することがなく、被着体に貼り付けて使用した
後に剥がしても被着体に糊残りせず容易に剥離すること
ができる。The constitution of the surface protective film of the present invention is as described above, and even if the produced surface protective film is laminated and stored in the form of a roll or a sheet, the adhesive strength is partially lowered. Even if it is peeled off after being attached to an adherend and used, the adhesive can be easily peeled off without leaving an adhesive residue on the adherend.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０９Ｊ 7/02 ＪＫＥ Ｃ０９Ｊ 7/02 ＪＫＥ ＪＫＫ ＪＫＫ ＪＫＭ ＪＫＭ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location C09J 7/02 JKE C09J 7/02 JKE JKK JKK JKM JKM JKM
Claims (1)
ムの片面に、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、イソプレン重合体ブロック、ま
たはそれらを水素添加して得られるオレフィン重合体ブ
ロックである）を主成分とし、これに粘着付与樹脂と、
ブリード性添加剤とが配合された粘着剤層が積層されて
なる表面保護フィルムにおいて、粘着剤層又は基材フィ
ルムの露出したいずれかの表面に凹凸が設けられてなる
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 on one side of a base film made of a polyolefin resin (wherein A is a styrene polymer block, B is a butadiene polymer block and isoprene). A polymer block, or an olefin polymer block obtained by hydrogenating them) as a main component, and a tackifying resin thereto,
In a surface protection film comprising a pressure-sensitive adhesive layer mixed with a bleeding additive, the surface protection is characterized in that unevenness is provided on either exposed surface of the pressure-sensitive adhesive layer or the base film. the film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8047229A JPH09241595A (en) | 1996-03-05 | 1996-03-05 | Surface protective film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8047229A JPH09241595A (en) | 1996-03-05 | 1996-03-05 | Surface protective film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09241595A true JPH09241595A (en) | 1997-09-16 |
Family
ID=12769387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8047229A Pending JPH09241595A (en) | 1996-03-05 | 1996-03-05 | Surface protective film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09241595A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167567A (en) * | 2000-12-01 | 2002-06-11 | Sekisui Chem Co Ltd | Surface-protecting film |
| JP2006299123A (en) * | 2005-04-21 | 2006-11-02 | Big Technos Kk | Pressure-sensitive adhesive sheet with recessed part and method for producing the same |
| JP2013121989A (en) * | 2011-06-15 | 2013-06-20 | Sekisui Chem Co Ltd | Pressure-sensitive adhesive composition and surface protecting film |
-
1996
- 1996-03-05 JP JP8047229A patent/JPH09241595A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002167567A (en) * | 2000-12-01 | 2002-06-11 | Sekisui Chem Co Ltd | Surface-protecting film |
| JP2006299123A (en) * | 2005-04-21 | 2006-11-02 | Big Technos Kk | Pressure-sensitive adhesive sheet with recessed part and method for producing the same |
| JP2013121989A (en) * | 2011-06-15 | 2013-06-20 | Sekisui Chem Co Ltd | Pressure-sensitive adhesive composition and surface protecting film |
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