JPH11193367A - Surface protective film - Google Patents
Surface protective filmInfo
- Publication number
- JPH11193367A JPH11193367A JP10252771A JP25277198A JPH11193367A JP H11193367 A JPH11193367 A JP H11193367A JP 10252771 A JP10252771 A JP 10252771A JP 25277198 A JP25277198 A JP 25277198A JP H11193367 A JPH11193367 A JP H11193367A
- Authority
- JP
- Japan
- Prior art keywords
- surface protective
- protective film
- adhesive layer
- substrate
- film
- 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 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 20
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 19
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 19
- -1 polypropylene Polymers 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 239000004743 Polypropylene Substances 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims abstract description 14
- 229920001155 polypropylene Polymers 0.000 claims abstract description 13
- 229920000098 polyolefin Polymers 0.000 claims abstract description 9
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 2
- 239000012790 adhesive layer Substances 0.000 abstract description 9
- 238000001125 extrusion Methods 0.000 abstract description 4
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 abstract description 3
- 239000003381 stabilizer Substances 0.000 abstract description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 abstract description 3
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract description 2
- 229920001577 copolymer Polymers 0.000 abstract description 2
- 229920003052 natural elastomer Polymers 0.000 abstract description 2
- 229920001194 natural rubber Polymers 0.000 abstract description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 abstract description 2
- 239000002075 main ingredient Substances 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 229920001684 low density polyethylene Polymers 0.000 description 6
- 239000004702 low-density polyethylene Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 229920005672 polyolefin resin Polymers 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 229920006132 styrene block copolymer Polymers 0.000 description 2
- 229920000428 triblock copolymer Polymers 0.000 description 2
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 229920000359 diblock copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 229920002587 poly(1,3-butadiene) polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920006124 polyolefin elastomer Polymers 0.000 description 1
- 229920001384 propylene homopolymer Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- 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、耐引裂性に優れた
表面保護フィルムに関するものである。TECHNICAL FIELD The present invention relates to a surface protective film having excellent tear resistance.
【０００２】[0002]
【従来の技術】合成樹脂板、化粧合板、金属板、塗装鋼
板等の表面に仮着し、これら被着材の加工時や搬送、保
管時の傷防止や汚れ防止のために、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層が設けられてな
る表面保護フィルムが汎用されている。2. Description of the Related Art A polyolefin resin is temporarily attached to the surface of a synthetic resin plate, decorative plywood, a metal plate, a painted steel plate, etc. to prevent scratches and stains during processing, transport and storage of these adherends. Surface protective films in which an adhesive layer is provided on one surface of a base film made of are widely used.
【０００３】上記表面保護フィルムは、巻重体から展開
されるときに裂けることなく引き剥がせ、また上記被着
材の加工時や保管時には上記被着材に密着しており、不
要となったならば上記被着材の表面に粘着層の一部を残
すことなく、また裂けることなく容易に剥離できる適度
の粘着性と耐引裂性が要求される。[0003] The surface protective film can be peeled off without being split when it is unrolled from the roll, and adheres to the adherend during processing or storage of the adherend. For example, a suitable adhesiveness and tear resistance that can be easily peeled off without leaving a part of the adhesive layer on the surface of the adherend and without tearing are required.
【０００４】該表面保護フィルムの耐引裂性について
は、フィルムの成型法によって性能が異なり、代表的な
成型法としてインフレーション法やＴダイ法があり、イ
ンフレーション法では比較的二軸延伸されるため、フィ
ルムの縦方向と横方向の強度差が生じにくく、耐引裂性
に優れたフィルムが得やすいが、Ｔダイで成型した場
合、縦方向に延伸されながら成型されるため、縦と横の
強度差や特に縦方向の耐引裂性が非常に弱くなる場合が
多い。With respect to the tear resistance of the surface protective film, the performance varies depending on the film forming method, and typical forming methods include an inflation method and a T-die method. In the inflation method, the film is relatively biaxially stretched. A difference in strength between the longitudinal and transverse directions of the film is unlikely to occur, and a film with excellent tear resistance is easily obtained. However, when molded with a T-die, the film is molded while being stretched in the longitudinal direction. In particular, the tear resistance in the vertical direction is often very weak.
【０００５】また、フィルムの末端は高速でのフィルム
巻き取りに対応して、瞬時に切断するため、ノコギリ状
の刃で切断する場合が多く、このときフィルム末端はノ
コギリ刃状になり、フィルムの縦方向にいわゆるノッチ
を形成したようになり、Ｔダイで成型されたフィルム巻
重体から展開する際に非常に縦裂けしやすくなる。[0005] In addition, since the end of the film is cut instantaneously in response to high-speed film winding, the end of the film is often cut with a saw blade. A so-called notch is formed in the vertical direction, and when the film is rolled out from a film roll formed by a T-die, it becomes very easy to split vertically.
【０００６】[0006]
【発明が解決しようとする課題】巻重体からの展開時の
裂け性の改善については、従来、フィルム末端に横方向
にテープを貼ったりすることにより縦裂けを防止する方
法があるが、加工工程上余分な手間が掛かり、作業性が
悪くなる。In order to improve the tearing property of the roll when it is unfolded, there has been a method of preventing longitudinal tearing by pasting a tape laterally at the end of the film. In addition, extra work is required, and workability deteriorates.
【０００７】そこで、特開平７−２４１９６０号や特開
平９−１３７１３９号で開示されているように、基材の
樹脂組成を特定の配合にして裂け性を防止する試みがな
されている。しかし、この方法によってもまだ十分とは
言えなかった。Therefore, as disclosed in Japanese Patent Application Laid-Open Nos. 7-241960 and 9-137139, attempts have been made to prevent the tearing property by setting the resin composition of the base material to a specific composition. However, this method was still not enough.
【０００８】そこで本発明は、基材の樹脂組成を特定の
配合にし、又は、基材の厚み、引張弾性率及び９０度引
裂強さを特定の範囲のものにすることによって、さらに
耐引裂性が改善された表面保護フィルムを提供するもの
である。Accordingly, the present invention provides a resin composition of a base material having a specific composition, or a base material having a thickness, a tensile modulus and a 90 ° tear strength within a specific range, thereby further improving the tear resistance. Is improved.
【０００９】[0009]
【課題を解決するための手段】すなわち、請求項１記載
の発明の表面保護フィルムは、Ｔダイ法によって製膜さ
れたポリオレフィン基材の片面に粘着剤層を有した表面
保護フィルムにおいて、該ポリオレフィン基材がポリプ
ロピレン１００重量部と直鎖状低密度ポリエチレン３０
〜８０重量部からなることを特徴とする。That is, the surface protective film according to the first aspect of the present invention is a polyolefin substrate formed by a T-die method and having a pressure-sensitive adhesive layer on one surface. The base material is 100 parts by weight of polypropylene and linear low density polyethylene 30
It is characterized by consisting of up to 80 parts by weight.
【００１０】又、請求項２記載の発明のの表面保護フィ
ルムは、プロピレン系樹脂及び直鎖状低密度ポリエチレ
ンからなるポリオレフィン基材の片面に粘着剤層を有す
る表面保護フィルムにおいて、基材の厚みが２０〜６０
μｍであり、ＪＩＳ Ｋ ６７８１に規定する引張弾性
率（縦）が３０００ｋｇｆ／ｃｍ2 以上、ＪＩＳ Ｋ７
１２８に規定する直角形引裂法に準じて測定した最大引
裂荷重が０．６ｋｇｆ以上であることを特徴とする。[0010] The surface protective film according to the second aspect of the present invention is a surface protective film having a pressure-sensitive adhesive layer on one surface of a polyolefin substrate comprising a propylene-based resin and linear low-density polyethylene. Is 20-60
μm, and the tensile elastic modulus (longitudinal) specified in JIS K6781 is 3000 kgf / cm 2 or more, and JIS K7
The maximum tearing load measured according to the right-angled tearing method specified in 128 is 0.6 kgf or more.
【００１１】表面保護フィルムは、ポリオレフィン基材
と粘着剤層とが共押出しＴダイによって製膜されるのが
好ましい。共押出しＴダイ法としては、代表的にはフィ
ードブロック法やマルチマニホールド法があり、どちら
でも可能である。いずれにしても、Ｔダイの吐出部まで
に基材であるポリオレフィン樹脂と粘着剤樹脂を溶融下
で密着して共押出しフィルムとして成型する。The surface protective film is preferably formed by co-extruding a polyolefin substrate and an adhesive layer with a T-die. As the co-extrusion T-die method, there are typically a feed block method and a multi-manifold method, both of which are possible. In any case, the polyolefin resin and the pressure-sensitive adhesive resin, which are the base material, are brought into close contact with each other by melting until the discharge portion of the T-die, and are molded as a co-extruded film.
【００１２】本発明で用いられるポリプロピレンは、プ
ロピレンのホモポリマー又はブロックポリマー若しくは
ランダムポリマーから適宜選択される。また、いわゆる
直鎖状低密度ポリエチレン（以下「ＬＬＤＰＥ」と略
す。）は、中低圧重合法にて製造された直鎖状の分子構
造を持つ低密度ポリエチレン（以下「ＬＤＰＥ」と略
す。）である。The polypropylene used in the present invention is appropriately selected from propylene homopolymer, block polymer or random polymer. Further, so-called linear low-density polyethylene (hereinafter abbreviated as “LLDPE”) is a low-density polyethylene (hereinafter abbreviated as “LDPE”) having a linear molecular structure manufactured by a medium-to-low pressure polymerization method. is there.
【００１３】ＬＬＤＰＥの配合量は、ポリプロピレン１
００重量部に対して３０重量部から８０重量部である。
３０重量部未満では、耐引裂性の改善ができない。８０
重量部を超えると、フィルム強度が低くなりすぎ、成型
しづらく、また表面保護フィルムとして適正な使用がで
きない。[0013] The compounding amount of LLDPE is polypropylene 1
It is 30 parts by weight to 80 parts by weight based on 00 parts by weight.
If the amount is less than 30 parts by weight, the tear resistance cannot be improved. 80
If the amount is more than 10 parts by weight, the film strength becomes too low, it is difficult to mold, and it cannot be used properly as a surface protective film.
【００１４】本発明で用いられる基材の厚みが２０μｍ
未満では、表面保護フィルムの大きさやその用途によっ
ても異なるが、基材の厚みが薄いために剥離や貼付作業
がしずらく、取扱性、作業性の悪いものとなるばかり
か、用途によっては表面保護機能が低下するものとな
る。又、６０μｍを超す場合、通常の用途であればこれ
以上の厚みは表面保護フィルムとして不要であり、コス
トアップになるばかりか、凹凸や湾曲等のある被着体へ
の面追従性が損なわれる。The thickness of the substrate used in the present invention is 20 μm
If the thickness is less than the above, it depends on the size of the surface protective film and its use, but the thickness of the base material is so thin that it is difficult to peel or stick, making it difficult to handle and work. The protection function will be reduced. Further, when the thickness exceeds 60 μm, if the thickness is more than 60 μm for ordinary use, the thickness is not required as a surface protection film, which not only increases the cost but also impairs the surface followability to an adherend having irregularities or curvature. .
【００１５】又、引張弾性率は、ＪＩＳ Ｋ ６７８１
に準拠して測定されるものであり、引張弾性率（縦）が
３０００ｋｇｆ／ｃｍ2 未満で、基材の厚みが２０〜６
０μｍでは、表面保護フィルムの剥離や貼付作業時にフ
ィルムが伸びてしまい、作業性を低下させるだけでな
く、表面保護フィルムを正常に貼付することを困難なら
しめるおそれがある。[0015] The tensile modulus of elasticity is JIS K6781.
The tensile modulus (longitudinal) is less than 3000 kgf / cm 2 , and the thickness of the substrate is 20 to 6
If the thickness is 0 μm, the film may be stretched at the time of peeling or sticking work of the surface protective film, which may not only reduce the workability but also make it difficult to attach the surface protective film normally.
【００１６】又、引裂荷重は、ＪＩＳ Ｋ ７１２８
（直角形引裂法）に準拠して測定されるものであり、引
裂荷重０．６ｋｇｆ未満では、本発明の意図する耐引裂
性が改善された表面保護フィルムを得ることができな
い。The tear load is JIS K 7128.
(Rectangular tearing method). When the tearing load is less than 0.6 kgf, it is not possible to obtain a surface protective film having improved tear resistance intended by the present invention.
【００１７】粘着剤は、押出し成型でき、また基材ポリ
オレフィン系樹脂と溶融下で密着するものが好ましく、
例えば、一般式Ａ−Ｂ−Ａで表されるトリブロック共重
合体若しくは該トリブロック共重合体と一般式Ａ−Ｂで
表されるジブロック共重合体の混合物（但し、Ａはスチ
レン系重合体ブロックを表し、Ｂはブタジエン重合体ブ
ロック若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を表す。）、ア
クリル酸エステル共重合体、スチレン−ブタジエンゴム
（ＳＢＲ）、天然ゴム等を主成分とし、粘着性を適宜制
御するために、粘着付与樹脂や安定剤等を含有させる。
これらの中でも、スチレン−ブタジエン−スチレンブロ
ック共重合体（ＳＢＳ）、スチレン−イソプレン−スチ
レンブロック共重合体（ＳＩＳ）、スチレン−エチレン
−ブチレン−スチレンブロック共重合体（ＳＥＢＳ）、
スチレン−エチレン−プロピレン−スチレンブロック共
重合体（ＳＥＰＳ）等の熱可塑性エラストマーが好適に
用いられる。The pressure-sensitive adhesive is preferably one that can be extruded and adheres to the base polyolefin resin under melting.
For example, a triblock copolymer represented by the general formula ABA or a mixture of the triblock copolymer and a diblock copolymer represented by the general formula AB (where A is a styrene-based polymer) Represents a united block, and B represents an olefin-based polymer block obtained by hydrogenating a butadiene polymer block or an isoprene polymer block.), An acrylate copolymer, a styrene-butadiene rubber (SBR), a natural rubber And the like, and a tackifier resin, a stabilizer, and the like are contained in order to appropriately control the tackiness.
Among them, styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS),
A thermoplastic elastomer such as styrene-ethylene-propylene-styrene block copolymer (SEPS) is preferably used.
【００１８】表面保護フィルムは巻重体として製造さ
れ、その巻終わりがノコギリ状の刃で切断されるもので
ある。The surface protective film is manufactured as a roll, and the end of the roll is cut with a saw-like blade.
【００１９】本発明の作用については、メカニズム的に
は不明であるが、基材でのポリオレフィン樹脂の構造が
ポリプロピレン系樹脂とＬＬＤＰＥ樹脂とが適度に相分
離し、Ｔダイ成型で生じるポリプロピレン樹脂の縦配向
性をＬＬＤＰＥが阻害するか、又はＬＬＤＰＥ相が分離
相となり、応力を分散することにより、縦裂け性を抑制
しているものと推定される。しかし、ＬＤＰＥでは十分
な耐引裂性が得られず、ゴム的性質を有するポリオレフ
ィン系エラストマーをＬＬＤＰＥの代わりに用いても、
ＬＬＤＰＥの場合ほどの効果が得られないので、本発明
のポリプロピレンとＬＬＤＰＥの組み合わせが最も効果
が高いと考えられる。Although the mechanism of the present invention is not known in terms of mechanism, the structure of the polyolefin resin in the base material is such that the polypropylene resin and the LLDPE resin are appropriately phase-separated, and the polypropylene resin produced by T-die molding is formed. It is presumed that LLDPE inhibits the longitudinal orientation or the LLDPE phase becomes a separated phase and disperses stress, thereby suppressing longitudinal tearing. However, sufficient tear resistance cannot be obtained with LDPE, and even if a polyolefin elastomer having rubber properties is used instead of LLDPE,
Since the effect as low as LLDPE cannot be obtained, the combination of the polypropylene of the present invention and LLDPE is considered to be the most effective.
【００２０】本発明の範囲として、基材樹脂がポリオレ
フィンとＬＬＤＰＥとからなることに加えて、要求に応
じて本系に安定剤や充填材等種々の添加剤を加えてもよ
い。In the scope of the present invention, in addition to the base resin comprising polyolefin and LLDPE, various additives such as stabilizers and fillers may be added to the system as required.
【００２１】[0021]
【発明の実施の形態】以下に、実施例を通じて本発明を
さらに詳しく説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples.
【００２２】（実施例１）ポリプロピレン（日本ポリケ
ム社製、製品名「ＢＣ３Ｍ」）１００重量部に対しＬＬ
ＤＰＥ（三井化学社製、製品名「ＵＺ１５２０Ｌ」）５
０重量部を混合し、基材層とし、粘着剤層にＳＥＢＳ樹
脂（シェル化学社製、製品名「クレイトンＧ１６５
７」）１００重量部に対し、粘着付与樹脂（荒川化学社
製、製品名「アルコンＰ−１００」）２０重量部を混合
したものを、フィードブロック型共押出しＴダイにて二
層共押出しして、基材層４０μｍ、粘着剤層１０μｍの
表面保護フィルムを作製した。成型速度１００ｍ／分で
フィルム端部はノコギリ状の刃で切断し、巻重体を得
た。Example 1 LL to 100 parts by weight of polypropylene (product name "BC3M" manufactured by Nippon Polychem Co., Ltd.)
DPE (Mitsui Chemicals, product name "UZ1520L") 5
0 parts by weight were mixed to form a base material layer, and an SEBS resin (manufactured by Shell Chemical Co., product name "Clayton G165") was used for the adhesive layer.
7)) 20 parts by weight of a tackifier resin (product name “Alcon P-100” manufactured by Arakawa Chemical Co., Ltd.) is mixed with 100 parts by weight, and two layers are co-extruded with a feed block type co-extrusion T die. Thus, a surface protective film having a substrate layer of 40 μm and an adhesive layer of 10 μm was produced. The film edge was cut with a saw blade at a molding speed of 100 m / min to obtain a roll.
【００２３】図１に示すように、得られた表面保護フィ
ルム２は巻重体１状であり、その末端辺３はノコギリ刃
状となっている。この得られた表面保護フィルム２の引
張り強度、引張弾性率、エルメンドルフ引裂強さを測定
した。また、巻重体１の末端辺３の端部３Ａから展開
し、その展開巻き出し性を評価した。その結果を表１に
示す。As shown in FIG. 1, the obtained surface protection film 2 is in the form of a roll 1 and its end side 3 is in the shape of a saw blade. The tensile strength, tensile modulus, and Elmendorf tear strength of the obtained surface protective film 2 were measured. Further, the wound body 1 was developed from the end 3A of the terminal side 3, and the developed unwinding property was evaluated. Table 1 shows the results.
【００２４】（比較例１）実施例１で、ＬＬＤＰＥを含
まない以外は同様にして巻重体を得た。実施例１と同様
の測定を行った。その結果を表１に示す。Comparative Example 1 A wound body was obtained in the same manner as in Example 1 except that LLDPE was not contained. The same measurement as in Example 1 was performed. Table 1 shows the results.
【００２５】（比較例２）実施例１でＬＬＤＰＥの代わ
りにＬＤＰＥ（三井化学社製、製品名「ミラソン１
２」）を用いた以外は同様にして巻重体を得た。実施例
１と同様の測定を行った。その結果を表１に示す。(Comparative Example 2) In Example 1, LDPE (manufactured by Mitsui Chemicals, Inc., product name "Mirason 1") was used instead of LLDPE.
A wound body was obtained in the same manner except that 2)) was used. The same measurement as in Example 1 was performed. Table 1 shows the results.
【００２６】（比較例３）実施例１で基材樹脂としてＬ
ＤＰＥ（三井化学社製、製品名「ミラソン１２」）のみ
を用いた以外は同様にして巻重体を得た。実施例１と同
様の測定を行った。その結果を表１に示す。Comparative Example 3 In Example 1, L was used as the base resin.
A roll was obtained in the same manner except that only DPE (manufactured by Mitsui Chemicals, Inc., product name "Mirason 12") was used. The same measurement as in Example 1 was performed. Table 1 shows the results.
【００２７】（比較例４）実施例１でＬＬＤＰＥの代わ
りに水素添加スチレン−ブタジエン共重合体（ＪＳＲ社
製、製品名「ダイナロン１３２１」）を用いた以外は同
様にして巻重体を得た。実施例１と同様の測定を行っ
た。その結果を表１に示す。Comparative Example 4 A roll was obtained in the same manner as in Example 1, except that a hydrogenated styrene-butadiene copolymer (manufactured by JSR, product name "Dynalon 1321") was used instead of LLDPE. The same measurement as in Example 1 was performed. Table 1 shows the results.
【００２８】（比較例５）実施例１で基材樹脂としてＬ
ＬＤＰＥのみを用いた以外は同様にして巻重体を得た。
実施例１と同様の測定を行った。その結果を表１に示
す。(Comparative Example 5) In Example 1, L was used as the base resin.
A roll was obtained in the same manner except that only LDPE was used.
The same measurement as in Example 1 was performed. Table 1 shows the results.
【００２９】（参考例）比較例３で成型法としてＴダイ
法の代わりにインフレーション法を用いた以外は同様に
して巻重体を得た。実施例１と同様の測定を行った。そ
の結果を表１に示す。Reference Example A wound body was obtained in the same manner as in Comparative Example 3, except that the inflation method was used instead of the T-die method as a molding method. The same measurement as in Example 1 was performed. Table 1 shows the results.
【００３０】[0030]
【表１】 ＰＰ：ポリプロピレン ＨＳＢＲ：水素添加スチレン−ブタジエン共重合体[Table 1] PP: polypropylene HSBR: hydrogenated styrene-butadiene copolymer
【００３１】（実施例２）ポリプロピレン（日本ポリケ
ム社製、製品名「ＢＣ３Ｍ」）７５重量部に対しＬＬＤ
ＰＥ（三井化学社製、製品名「ＵＺ１５２０Ｌ」）２５
重量部を混合し、基材層とし、粘着剤層にＳＥＢＳ樹脂
の水素添加物（シェル化学社製、製品名「クレイトンＧ
１６５７」）１００重量部に対し、粘着付与樹脂（荒川
化学社製、製品名「アルコンＰ−１００」）１０重量
部、酸化防止剤（チバガイギー社製、製品名「イルガノ
クス１０１０」）０．５重量部を混合したものを、フィ
ードブロック型共押出しＴダイにて二層共押出しして、
基材層４３μｍ、粘着剤層７μｍの表面保護フィルムを
作製した。(Example 2) Polypropylene (manufactured by Nippon Polychem Co., Ltd., product name "BC3M") 75 parts by weight of LLD
PE (Mitsui Chemicals, product name "UZ1520L") 25
By weight, a base material layer is mixed, and a hydrogenated SEBS resin (product name "Clayton G" manufactured by Shell Chemical Co., Ltd.) is applied to the adhesive layer.
1657 ”), 100 parts by weight, 10 parts by weight of a tackifier resin (manufactured by Arakawa Chemical Co., product name“ Alcon P-100 ”), and 0.5 parts by weight of an antioxidant (manufactured by Ciba Geigy, product name“ Irganox 1010 ”) Part was mixed, and two layers were co-extruded with a feed block type co-extrusion T-die.
A surface protective film having a substrate layer of 43 μm and an adhesive layer of 7 μm was prepared.
【００３２】（比較例６）実施例２の基材層に替えて、
ポリプロピレン（実施例２と同じ）１００重量部のみを
用いたこと以外、実施例２と同様にして表面保護フィル
ムを作製した。(Comparative Example 6) Instead of the base material layer of Example 2,
A surface protection film was produced in the same manner as in Example 2, except that only 100 parts by weight of polypropylene (same as in Example 2) was used.
【００３３】（比較例７）実施例２の基材層に替えて、
低密度ポリエチレン（三井化学社製、製品名「ミラソン
１２」）１００重量部のみを用いたこと以外、実施例２
と同様にして表面保護フィルムを作製した。(Comparative Example 7) Instead of the base material layer of Example 2,
Example 2 except that only 100 parts by weight of low-density polyethylene (manufactured by Mitsui Chemicals, product name "Mirason 12") was used.
A surface protection film was produced in the same manner as described above.
【００３４】（比較例８）実施例２の基材層に替えて、
高密度ポリエチレン（旭化成社製、製品名「Ｌ４４７
０」）１００重量部のみを用いたこと以外、実施例２と
同様にして表面保護フィルムを作製した。(Comparative Example 8) Instead of the base material layer of Example 2,
High-density polyethylene (product name "L447" manufactured by Asahi Kasei Corporation)
0 ") A surface protective film was produced in the same manner as in Example 2 except that only 100 parts by weight was used.
【００３５】実施例２及び比較例６〜８で得られた表面
保護フィルムの引張弾性率、引裂強度を、実施例１と同
様に測定した。又、これら表面保護フィルムを厚み１ｍ
ｍのＳＵＳ＃３０４ＨＬ仕上げに貼付し、４辺をシャー
リングで切断して試料を作製し、約３０ｍ／分の剥離速
度で貼付された表面保護フィルムを引き剥がし、表面保
護フィルムの引剥し時の実用評価を行った。評価結果は
表２に示す。The tensile modulus and tear strength of the surface protective films obtained in Example 2 and Comparative Examples 6 to 8 were measured in the same manner as in Example 1. In addition, these surface protective films are 1 m thick.
m SUS # 304HL finish, cut the four sides by shearing to prepare a sample, peel off the surface protective film adhered at a peeling speed of about 30 m / min, and practically use when peeling off the surface protective film An evaluation was performed. Table 2 shows the evaluation results.
【００３６】[0036]
【表２】 [Table 2]
【００３７】[0037]
【発明の効果】以上説明した通り本発明の表面保護フィ
ルムは、巻重体から展開した場合の耐引裂性が改善さ
れ、作業性も向上することができる。As described above, the surface protective film of the present invention can be improved in tear resistance and workability when it is developed from a roll.
【図１】表面保護フィルムの巻重体末端辺がノコギリ刃
状に切断されている状態を示す斜視図である。FIG. 1 is a perspective view showing a state in which a terminal edge of a wound body of a surface protection film is cut into a saw blade shape.
１：巻重体 ２：表面保護フィルム ３：表面保護フィルムの末端辺 1: Wound body 2: Surface protective film 3: Terminal edge of surface protective film
Claims (2)
ィン基材の片面に粘着剤層を有する表面保護フィルムに
おいて、該ポリオレフィン基材がポリプロピレン１００
重量部と直鎖状低密度ポリエチレン３０〜８０重量部か
らなることを特徴とする表面保護フィルム。1. A surface protective film having a pressure-sensitive adhesive layer on one side of a polyolefin substrate formed by a T-die method, wherein the polyolefin substrate is polypropylene 100.
A surface protective film comprising: parts by weight and 30 to 80 parts by weight of a linear low-density polyethylene.
エチレンからなるポリオレフィン基材の片面に粘着剤層
を有する表面保護フィルムにおいて、基材の厚みが２０
〜６０μｍであり、ＪＩＳ Ｋ ６７８１に規定する引
張弾性率（縦）が３０００ｋｇｆ／ｃｍ2 以上、ＪＩＳ
Ｋ ７１２８に規定する直角形引裂法に準じて測定し
た最大引裂荷重が０．６ｋｇｆ以上であることを特徴と
する表面保護フィルム。2. A surface protective film having a pressure-sensitive adhesive layer on one side of a polyolefin substrate comprising a propylene-based resin and a linear low-density polyethylene, wherein the substrate has a thickness of 20.
６０60 μm, and the tensile elastic modulus (longitudinal) specified in JIS K6781 is 3000 kgf / cm 2 or more.
A surface protective film having a maximum tear load of 0.6 kgf or more measured according to the right-angled tearing method specified in K7128.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10252771A JPH11193367A (en) | 1997-11-05 | 1998-09-07 | Surface protective film |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9-303012 | 1997-11-05 | ||
| JP30301297 | 1997-11-05 | ||
| JP10252771A JPH11193367A (en) | 1997-11-05 | 1998-09-07 | Surface protective film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11193367A true JPH11193367A (en) | 1999-07-21 |
Family
ID=26540868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10252771A Pending JPH11193367A (en) | 1997-11-05 | 1998-09-07 | Surface protective film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11193367A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001302995A (en) * | 2000-04-21 | 2001-10-31 | Sekisui Chem Co Ltd | Surface protection film |
| EP1505137A1 (en) * | 2003-08-07 | 2005-02-09 | Mitsui Chemicals, Inc. | Adhesive sheet |
| JP2005194311A (en) * | 2003-12-26 | 2005-07-21 | Dainippon Printing Co Ltd | Combination of surface-coated adhesive sheet, release-coated surface-coated adhesive sheet and adhesive sheet |
| JP2011111552A (en) * | 2009-11-27 | 2011-06-09 | Nitto Denko Corp | Coating film protective sheet |
| JP2011111551A (en) * | 2009-11-27 | 2011-06-09 | Nitto Denko Corp | Coating film protective sheet |
| WO2013121887A1 (en) * | 2012-02-15 | 2013-08-22 | 日東電工株式会社 | Surface-protecting sheet |
| JP2017106014A (en) * | 2015-12-08 | 2017-06-15 | 積水化学工業株式会社 | Heat resistant adhesive film, surface protective film and manufacturing method of heat resistant adhesive film |
-
1998
- 1998-09-07 JP JP10252771A patent/JPH11193367A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001302995A (en) * | 2000-04-21 | 2001-10-31 | Sekisui Chem Co Ltd | Surface protection film |
| EP1505137A1 (en) * | 2003-08-07 | 2005-02-09 | Mitsui Chemicals, Inc. | Adhesive sheet |
| JP2005194311A (en) * | 2003-12-26 | 2005-07-21 | Dainippon Printing Co Ltd | Combination of surface-coated adhesive sheet, release-coated surface-coated adhesive sheet and adhesive sheet |
| JP2011111552A (en) * | 2009-11-27 | 2011-06-09 | Nitto Denko Corp | Coating film protective sheet |
| JP2011111551A (en) * | 2009-11-27 | 2011-06-09 | Nitto Denko Corp | Coating film protective sheet |
| US9382454B2 (en) | 2009-11-27 | 2016-07-05 | Nitto Denko Corporation | Paint film-protecting sheet |
| US9382453B2 (en) | 2009-11-27 | 2016-07-05 | Nitto Denko Corporation | Paint film-protecting sheet |
| WO2013121887A1 (en) * | 2012-02-15 | 2013-08-22 | 日東電工株式会社 | Surface-protecting sheet |
| JP2017106014A (en) * | 2015-12-08 | 2017-06-15 | 積水化学工業株式会社 | Heat resistant adhesive film, surface protective film and manufacturing method of heat resistant adhesive film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2713519B2 (en) | Surface protection film | |
| JP3498148B2 (en) | Use of strip-like adhesive film for releasable adhesive bonding | |
| JP3370198B2 (en) | Surface protection film | |
| JP5987293B2 (en) | Adhesive and adhesive film | |
| JPH11199840A (en) | Adhesive tape substrate, adhesive tape and adhesive tape with release tape | |
| CN102250561A (en) | Pressure-sensititve adhesive tape | |
| JP2009143998A (en) | Surface protection film | |
| CN101978010A (en) | Carrier film, especially for adhesive tapes, and use thereof | |
| JPH11193367A (en) | Surface protective film | |
| JP2009114407A (en) | Surface-protecting film | |
| JP6793051B2 (en) | Surface protective film | |
| JP2007161882A (en) | Surface-protective film | |
| KR102279434B1 (en) | Self-adhesive surface-protection film | |
| JPH11199839A (en) | Surface protection film | |
| JP2001302995A (en) | Surface protection film | |
| JP2002347180A (en) | Coextrusion film or the like, and tape products and manufactured goods or the like including them | |
| JP3364293B2 (en) | Polyolefin-based base film and adhesive film or sheet | |
| JPH0726213A (en) | Surface protective film | |
| JPH1053748A (en) | Masking tape or sheet | |
| JPH1143655A (en) | Adhesive tape or sheet | |
| JP7083882B2 (en) | Surface protection film | |
| JP2002338918A (en) | Surface protection film | |
| JP2000034450A (en) | Adhesive tape | |
| JPH0873822A (en) | Surface-protection film | |
| JP6397644B2 (en) | Surface protection film |