JPH0347886A - Surface protecting film - Google Patents
Surface protecting filmInfo
- Publication number
- JPH0347886A JPH0347886A JP1182443A JP18244389A JPH0347886A JP H0347886 A JPH0347886 A JP H0347886A JP 1182443 A JP1182443 A JP 1182443A JP 18244389 A JP18244389 A JP 18244389A JP H0347886 A JPH0347886 A JP H0347886A
- Authority
- JP
- Japan
- Prior art keywords
- surface protection
- film
- adhesive layer
- protection film
- density
- 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.)
- Granted
Links
- 239000012790 adhesive layer Substances 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 150000003505 terpenes Chemical class 0.000 claims abstract description 13
- 235000007586 terpenes Nutrition 0.000 claims abstract description 13
- 239000005011 phenolic resin Substances 0.000 claims abstract description 5
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 15
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 15
- -1 polyethylene Polymers 0.000 claims description 14
- 239000004698 Polyethylene Substances 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 229920003002 synthetic resin Polymers 0.000 abstract description 3
- 239000000057 synthetic resin Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 36
- 230000001070 adhesive effect Effects 0.000 description 36
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920000515 polycarbonate Polymers 0.000 description 5
- 239000004417 polycarbonate Substances 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 238000007718 adhesive strength test Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は使用前の板材の表面を保護するために貼着して
おく表面保護フィルムに関するものであり、特に、表面
保護フィルムを貼着したまま加熱下に加工される合成樹
脂板に好適な表面保護フィルムに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a surface protection film that is attached to protect the surface of a board before use. The present invention relates to a surface protection film suitable for synthetic resin plates that are processed under heating.
アクリル樹脂板、ポリカーボネート板、塩化ビニル樹脂
板等の合成樹脂板や、ポリエチレンテレフタレートシー
ト、金属薄板等シート材の表面が使用開始前に損傷を受
けるのを防ぐための表面保護フィルムフィルムとしては
、従来種々のものが提案されているが、近年もっとも普
通に使われているのは、エチレン・酢酸ビニル共重合体
とポリエチレンとを共押し出しして得られた積層フィル
ムであって、この場合、エチレン・酢酸ビニル共重合体
層が接着剤層となってポリエチレンフィルムを樹脂板表
面に固定する。Conventional surface protection films are used to prevent the surface of synthetic resin plates such as acrylic resin plates, polycarbonate plates, and vinyl chloride resin plates, as well as sheet materials such as polyethylene terephthalate sheets and thin metal plates, from being damaged before they are used. Various products have been proposed, but the one most commonly used in recent years is a laminated film obtained by coextruding an ethylene/vinyl acetate copolymer and polyethylene. The vinyl acetate copolymer layer acts as an adhesive layer to fix the polyethylene film to the surface of the resin plate.
表面保護フィルムにおいては、表面保護作用の良否を支
配するフィルム全体の物性もさることながら、接着剤層
の特性が特に重要である。すなわち、板材製造時に貼着
された表面保護フィルムは、その板材の運搬、加工等の
取り扱いを受けるとき剥がれることがないよう、確実に
接着されていなければならないが、最終的に不要になっ
て剥がすときには、簡単に剥がれることが必要である。In surface protection films, the properties of the adhesive layer are particularly important, as well as the physical properties of the entire film, which govern the quality of the surface protection effect. In other words, the surface protection film applied during the manufacture of the board must be firmly adhered so that it will not peel off when the board is transported, processed, etc., but it must eventually be removed when it becomes unnecessary. Sometimes you need something that comes off easily.
通常、表面保護フィルムがひとりでに剥がれないために
は、約１０ ｇ／２５ｍｍ幅以上の接着力が必要であり
、また、剥がそうとしたとき簡単に剥がれるためには接
着力が約５０ ｇ／２５ｍｍ幅をこえないことが必要と
されているから、その接着力は、約１０〜５０ ｇ／２
５ｍｍ幅であればよいことになる。しかしながら、接着
された表面保護フィルムをひき剥がすの、に必要な力は
多くの場合経時的に増加し、その傾向は温度が高いと一
層加速されるから、最初に適当な接着力のものも、後で
剥がす頃には強すぎるほど接着していることが多い。Normally, in order for the surface protection film to not peel off by itself, an adhesive force of approximately 10 g/25 mm width or more is required, and in order for it to peel off easily when you try to peel it off, an adhesive force of approximately 50 g/25 mm width is required. The adhesive strength is approximately 10 to 50 g/2.
A width of 5 mm is sufficient. However, the force required to peel off an adhered surface protection film often increases over time, and this tendency is further accelerated at higher temperatures. By the time you peel it off later, the adhesive is often too strong.
板がその加工工程において表面保護フィルム貼着状態の
まま加熱される場合、上述のような問題点は特に顕著に
なる。たとえば、計器盤に加工されるポリカーボネート
板の場合、押出成形直後に貼着された表面保護フィルム
は、印刷工程において印刷面のものが剥がされるが、背
面のものはそのまま印刷後の乾燥工程における加熱を受
けることになる。印刷が多色刷りであれば、加熱乾燥は
色数だけくりかえされる。エチレン・酢酸ビニル共重合
体からなる接着剤層は、温度が高いと接着力が増加する
傾向があるから、このように繰り返し加熱を受けると次
第に接着力を増し、不要になったときの剥離を著しく困
難にする。If the plate is heated during the processing process with the surface protection film attached, the above-mentioned problems become particularly noticeable. For example, in the case of a polycarbonate plate processed into an instrument panel, the surface protection film applied immediately after extrusion is peeled off on the printed side during the printing process, but the surface protection film on the back side is left untouched during the drying process after printing. will receive. If the printing is multicolored, heating and drying is repeated for the number of colors. The adhesive layer made of ethylene/vinyl acetate copolymer tends to increase its adhesive strength when the temperature is high, so repeated heating in this way gradually increases its adhesive strength and prevents it from peeling off when it is no longer needed. make it extremely difficult.
エチレン酢酸ビニル共重合体からなる接着剤層の加熱に
よる接着力の増大傾向は、この共重合体の酢酸ビニル共
重合比を低くすれば抑えることができるが、それでは、
必要な初期接着力を確保することが難しくなる。The tendency of the adhesive layer made of ethylene vinyl acetate copolymer to increase in adhesive strength due to heating can be suppressed by lowering the vinyl acetate copolymerization ratio of this copolymer.
It becomes difficult to secure the necessary initial adhesive strength.
そこで本発明の目的は、前述のような好ましい一定範囲
の接着力を、温度条件のいかんにかかわらずなるべく長
期間安定して示す表面保護フィルムを提供することにあ
る。Therefore, an object of the present invention is to provide a surface protection film that stably exhibits adhesive strength within a certain preferable range as described above for as long as possible regardless of temperature conditions.
本発明が提供する新規な表面保護フィルムは、密度が０
．９００１７ｃｍ３ないし０．９２０１７ｃｍ３でＭＦ
Ｒ（メルトフローレート）が好ましくは２ないし３０の
直鎖状低密度ポリエチレン９５．０ないし９９．９重量
％と粘着付与剤５．０ないし０．１重量％とからなる接
着剤層をポリエチレンフィルムの片面に設けてなるもの
である。The novel surface protection film provided by the present invention has a density of 0.
．． MF at 90017cm3 to 0.92017cm3
An adhesive layer consisting of 95.0 to 99.9% by weight of linear low-density polyethylene with an R (melt flow rate) of preferably 2 to 30 and 5.0 to 0.1% by weight of a tackifier is attached to a polyethylene film. It is provided on one side of the.
ここで密度はＡＳＴＭ−Ｄ−１５０５により測定される
値であり、またＭＦＲは、ＡＳＴＭ−Ｄ−１２３８によ
り測定される値である。Here, density is a value measured according to ASTM-D-1505, and MFR is a value measured according to ASTM-D-1238.
本発明の表面保護フィルムにおいて、ポリエチレンフィ
ルムの表面に形成された上記密度範囲の直鎖状低密度ポ
リエチレン９５．０ないし９９．９重量％と粘着付与剤
５．０ないし０．１重量％とからなる接着剤層は、適度
の初期接着力と良好な熱安定性を有し、加熱されても、
また長期間保存されても、接着力の増加は僅かである。In the surface protection film of the present invention, 95.0 to 99.9% by weight of linear low-density polyethylene having the above density range formed on the surface of the polyethylene film and 5.0 to 0.1% by weight of a tackifier. The adhesive layer has moderate initial adhesive strength and good thermal stability, and even when heated,
Furthermore, even when stored for a long period of time, the adhesive strength increases only slightly.
本発明の表面保護フィルムの接着剤層の主成分である直
鎖状低密度ポリエチレンは、遷移金属化合物、有機金属
化合物および電子供与体を触媒にして炭素数約３〜８の
α−オレフィンとエチレンとを共重合させて得られる周
知のポリマーであって、その製造法はたとえば特開昭５
７−６５７１７号公報に記載されている。Linear low-density polyethylene, which is the main component of the adhesive layer of the surface protection film of the present invention, is made of α-olefin having about 3 to 8 carbon atoms and ethylene using a transition metal compound, an organometallic compound, and an electron donor as a catalyst. It is a well-known polymer obtained by copolymerizing with
It is described in No. 7-65717.
密度が約０．８８０１７ｃｍ３から約０．９２０１／ｃ
＋ｎ３のものが市販されているが、本発明において使用
可能なものは、密度が０．９００−０．９２０ｇ／ｃｍ
３までのものである。密度が０．９２０１７ｃｍ３をこ
えると、初期接着力が不十分なものとなる。また、密度
が０．９００ ｇ／ｃｍ’を下回ると、接着剤層の凝集
力が不足し、表面保護フィルムを用済み後に樹脂板から
剥がすとき樹脂板に接着剤層の断片が残って樹脂板表面
を汚染する。Density is about 0.88017cm3 to about 0.9201/c
+n3 is commercially available, but the one that can be used in the present invention has a density of 0.900-0.920 g/cm
Up to 3. If the density exceeds 0.92017 cm3, the initial adhesive strength will be insufficient. In addition, if the density is less than 0.900 g/cm', the cohesive force of the adhesive layer will be insufficient, and when the surface protection film is removed from the resin plate after use, fragments of the adhesive layer will remain on the resin plate, causing the resin plate to deteriorate. Contaminate surfaces.
本発明の表面保護フィルムの接着剤層に使用する直鎖状
低密度ポリエチレンはまた、ＭＦＲが２〜３０であるこ
とが望ましいが、これは、ＭＦＲが２未満では溶融状態
における延展性に乏しく、高速製膜が困難であり、一方
３０をこえても、溶融物の流動性が良すぎて製膜が困難
になるためである。The linear low-density polyethylene used in the adhesive layer of the surface protection film of the present invention preferably has an MFR of 2 to 30; however, if the MFR is less than 2, it has poor spreadability in the molten state; This is because high-speed film formation is difficult, and even if it exceeds 30, the fluidity of the melt is too good, making film formation difficult.
直鎖状低密度ポリエチレンに配合する粘着付与剤として
は、直鎖状低密度ポリエチレンと相溶性が良く透明な混
合物を与え、かつ直鎖状低密度ポリエチレンの製膜性を
著しく悪化させないものであることが必要である。その
好ましい具体例としては、水添テルペン樹脂、テルペン
樹脂、およびテルペンフェノール樹脂などがある。The tackifier to be added to linear low-density polyethylene should be one that has good compatibility with linear low-density polyethylene, provides a transparent mixture, and does not significantly deteriorate the film-forming properties of linear low-density polyethylene. It is necessary. Preferred specific examples include hydrogenated terpene resins, terpene resins, and terpene phenol resins.
接着剤層の適度な接着力は、直鎖状低密度ポリエチレン
に適量の粘着付与剤を配合することにより得られる。粘
着付与剤の量が多すぎると加熱されたときの接着力増加
が大きく、反対に粘着付与剤の量が不十分であると、初
期接着力か不足する。直鎖状低密度ポリエチレンだけで
は、はとんど接着力を示さない。Appropriate adhesive strength of the adhesive layer can be obtained by blending an appropriate amount of tackifier with linear low-density polyethylene. If the amount of tackifier is too large, the increase in adhesive strength upon heating will be large; on the other hand, if the amount of tackifier is insufficient, the initial adhesive strength will be insufficient. Linear low-density polyethylene alone rarely exhibits adhesive strength.
言うまでもなく、接着剤層はそれと保護対象物との間に
生じる接着力よりも強い接着力で、ポリエチレンフィル
ムに固定されていることが必要である。また、接着剤層
形成用樹脂混合物を有機溶剤に溶かしてポリエチレンフ
ィルムに塗布したものは、残存有機溶剤が樹脂板表面を
侵すことがあるので好ましくない。最も好ましい積層状
態は、接着剤層形成用樹脂混合物とポリエチレンとを共
押出法で積層フィルム状に成形し、成形と同時に積層を
行うことにより実現することができる。Needless to say, it is necessary that the adhesive layer is fixed to the polyethylene film with a stronger adhesive force than the adhesive force that occurs between it and the object to be protected. Further, it is not preferable to dissolve the adhesive layer-forming resin mixture in an organic solvent and apply it to a polyethylene film because the residual organic solvent may corrode the surface of the resin plate. The most preferable laminated state can be achieved by molding the adhesive layer-forming resin mixture and polyethylene into a laminated film by co-extrusion, and laminating simultaneously with the molding.
本発明の表面保護フィルムにおいて、ポリエチレンフィ
ルム層と接着剤層の厚さは特に限定されるものではない
が、通常、３０〜６０μ厚のポリエチレンフィルムに１
０〜２０μの接着剤層を施したものが好ましい。In the surface protection film of the present invention, the thickness of the polyethylene film layer and the adhesive layer is not particularly limited, but usually, the thickness of the polyethylene film layer of 30 to 60 μm is
Those provided with an adhesive layer of 0 to 20 microns are preferred.
本発明の表面保護フィルムの使用法は従来の表面保護フ
ィルムのそれと特に異なるものではない。すなわち、成
形直後の樹脂板等、表面保護を必要とする製品の表面に
本発明の表面保護フィルムの接着剤層側を押し当てて貼
着する。良好な接着は、室温〜約８０°Ｃの温度で可能
である。The method of using the surface protection film of the present invention is not particularly different from that of conventional surface protection films. That is, the adhesive layer side of the surface protection film of the present invention is pressed against and adhered to the surface of a product requiring surface protection, such as a resin plate immediately after molding. Good adhesion is possible at temperatures from room temperature to about 80°C.
以下、実施例を示して本発明を説明する。なお、各側に
おいて示した接着力は１８００剥離力であって、２５ｍ
ｍ幅のものについて引張速度３００ ｃｍ／分で測定し
Ｉこ。The present invention will be explained below with reference to Examples. The adhesive strength shown on each side was 1800 peel strength and 25 m
Measurements were taken at a tensile speed of 300 cm/min on a piece with a width of m.
実施例１
密度０．９１０ ｇ／ｃｍ３、ＭＦＲＩＯの直鎖状低密
度ポリエチレン９９．９重量部と粘着付与剤・テルペン
樹脂０．１重量部とからなる接着剤層形成用樹脂混合物
を、密度０ ９４５ ｇ／ｃｍ３の高密度ポリエチレン
と７ラツトダイから共押出しして、全厚さ４０μ、接着
剤層厚さが１１μの、積層フィルムを製造した。この積
層フィルムは透明で、かつ表面保護フィルムとして適７
当な物性のものであった。Example 1 A resin mixture for forming an adhesive layer consisting of 99.9 parts by weight of MFRIO's linear low-density polyethylene with a density of 0.910 g/cm3 and 0.1 parts by weight of a tackifier/terpene resin was prepared with a density of 0. A laminate film with a total thickness of 40 microns and an adhesive layer thickness of 11 microns was produced by coextrusion with 945 g/cm3 high density polyethylene through a 7-rat die. This laminated film was transparent and had physical properties suitable for use as a surface protection film.
この積層フィルムを厚さ２ｎ＋ｍの押出成形された直後
のポリカーボネート板に、板温度が約４０１℃まで低下
したところで、表面保護フィルムとして貼り合わせた。This laminated film was laminated as a surface protection film to a polycarbonate plate having a thickness of 2n+m immediately after extrusion molding, when the plate temperature had decreased to about 401°C.
そして、種々の条件で保存し、表面保護フィルムとポリ
カーボネート板との接着力の経時的変化を調べた。The samples were then stored under various conditions and changes in the adhesive strength between the surface protection film and the polycarbonate plate over time were examined.
その結果を表１に示す。なお、室温２４時間後の接着力
を初期接着力とし、加熱保存試験は１００ ｇ／ｃｍ２
の加圧下で行なった。The results are shown in Table 1. The initial adhesive strength is the adhesive strength after 24 hours at room temperature, and the heat storage test is 100 g/cm2.
The test was carried out under pressure.
表１から、この表面保護フィルムは初期接着力が１０
ｇ／２５ｍｍ幅で十分大きく、しかも苛酷な条件で保存
した後も接着力か１５ ｇ／２５ｍｍ幅と十分小さく、
剥がし易いことが分かる。From Table 1, this surface protection film has an initial adhesive strength of 10
It is large enough at 15g/25mm width, and small enough to maintain adhesive strength of 15g/25mm even after being stored under harsh conditions.
It turns out that it is easy to peel off.
剥離後、ポリカーボネート板への接着剤残留は認められ
なかった。After peeling, no adhesive remained on the polycarbonate plate.
実施例２
密度０．９２０ ｇ／ｃ＋ｎ３、ＭＦＲ４の直鎖状低密
度ポリエチレン９５重量部と粘着付与剤・テルペンフェ
ノール樹脂５重量部とからなる接着剤層形成用樹脂混合
物を、密度０．９２５ ｇ／ｃｍ３の低密度ポリエチレ
ンとフラットダイから共押出しして、全厚さ６０μ、接
着剤層厚さが１７μの、積層フィルムを製造した。この
積層フィルムは透明で、表面保護フィルムとして適当な
物性のものであった。Example 2 A resin mixture for forming an adhesive layer consisting of 95 parts by weight of linear low-density polyethylene with a density of 0.920 g/c+n3 and MFR4 and 5 parts by weight of a tackifier/terpene phenol resin was prepared with a density of 0.925 g. /cm3 of low density polyethylene and coextruded from a flat die to produce a laminated film with a total thickness of 60μ and an adhesive layer thickness of 17μ. This laminated film was transparent and had physical properties suitable as a surface protection film.
この積層フィルムを厚さ３ｍｍの押出成形された直後の
アクリル樹脂板に、板温度が約５０℃まで低下したとこ
ろで、表面保護フィルムとして貼り合わせた。そして種
々の条件で保存し、表面保護フィルムとアクリル樹脂板
との接着力の経時的変化を実施例１と同様にして調べた
。その結果を表１に示す。This laminated film was laminated as a surface protection film to a 3 mm thick acrylic resin plate immediately after extrusion molding, when the plate temperature had decreased to about 50°C. The samples were then stored under various conditions, and changes in the adhesive strength between the surface protection film and the acrylic resin plate over time were examined in the same manner as in Example 1. The results are shown in Table 1.
なお、剥離後、アクリル樹脂板への接着剤残留は認めら
れなかった。Note that no adhesive remained on the acrylic resin plate after peeling.
比較例１
テルペン樹脂を用いないほかは実施例１と同様にして、
直鎖状低密度ポリエチレンとポリエチレンとからなる積
層フィルムを製造し、実施例１の場合と同様の接着力試
験を行なった。その結果は表１に示したとおりで、初期
接着力が低すぎるものであった。Comparative Example 1 Same as Example 1 except that terpene resin was not used,
A laminated film made of linear low-density polyethylene and polyethylene was produced, and the same adhesion test as in Example 1 was conducted. The results are shown in Table 1, and the initial adhesive strength was too low.
比較例２
テルペンフェノール樹脂の量を７重量部に増やしたほか
は実施例２と同様にして、直鎖状低密度ポリエチレンと
ポリエチレンとからなる積層フィルムを製造し、実施例
１の場合と同様の接着力試験を行なった。その結果は表
１に示したとおりで、経時的な接着力増加が大きすぎる
ものであフた。Comparative Example 2 A laminated film made of linear low-density polyethylene and polyethylene was produced in the same manner as in Example 2 except that the amount of terpene phenol resin was increased to 7 parts by weight. An adhesion test was conducted. The results are shown in Table 1, and the increase in adhesive strength over time was too large.
比較例３
酢酸ビニル含有量６重量％、ＭＦＲ４のエチレン酢酸ビ
ニル共重合体を接着剤層形成用樹脂として用い、密度０
．９２５の低密度ポリエチレンを用いて、共押出し法に
より厚さ６０μ、接着剤層厚さ１７μの積層フィルムを
製造した。実施例１の場合と同様の接着力試験を行なっ
た結果は表１のとおりであって、初期接着力が低すぎる
ものであった。Comparative Example 3 An ethylene vinyl acetate copolymer with a vinyl acetate content of 6% by weight and an MFR of 4 was used as the adhesive layer forming resin, and the density was 0.
．． A laminated film having a thickness of 60 μm and an adhesive layer thickness of 17 μm was produced by coextrusion using 925 low density polyethylene. The results of an adhesive strength test similar to that in Example 1 are shown in Table 1, and the initial adhesive strength was too low.
比較例４
エチレン酢酸ビニル共重合体に粘着付与剤としてテルペ
ン樹脂１重量％を配合したほかは比較例３と同様にして
積層フィルムを製造した。実施例１の場合と同様の接着
力試験を行なった結果は表１のとおりであって、経時的
な接着力増加が大きすぎるものであった。Comparative Example 4 A laminated film was produced in the same manner as Comparative Example 3, except that 1% by weight of a terpene resin was added as a tackifier to the ethylene-vinyl acetate copolymer. The results of the same adhesive strength test as in Example 1 are shown in Table 1, and the increase in adhesive strength over time was too large.
表１ 接着力（ｇ／２５ｍｍ幅〕
〔発明の効果〕
実施例の結果から明らかなように、本発明の表面保護フ
ィルムは表面保護フィルムとして必要な物性を備え、適
度の初期接着力を示すだけでなく、加熱下に置かれた場
合も接着力の経時的変化が小さく、剥がし易い。したが
って、貼着後に保護対象物が加熱下の加工を受けたり長
期間保存されるような場合にも安心して使用することが
できる。Table 1 Adhesive strength (g/25mm width) [Effects of the invention] As is clear from the results of the examples, the surface protection film of the present invention has the necessary physical properties as a surface protection film and only shows a moderate initial adhesive strength. Even if it is placed under heat, the adhesive strength changes little over time and is easy to remove.Therefore, it is safe even if the object to be protected is processed under heat or stored for a long time after being pasted. It can be used with care.
Claims (4)
／ｃｍ＾３の直鎖状低密度ポリエチレン９５．０ないし
９９．９重量％と粘着付与剤５．０ないし０．１重量％
とからなる接着剤層をポリエチレンフィルムの片面に設
けてなる表面保護フィルム。(1) Density 0.900g/cm^3 to 0.920g
/cm^3 linear low density polyethylene 95.0 to 99.9% by weight and tackifier 5.0 to 0.1% by weight
A surface protection film consisting of an adhesive layer on one side of a polyethylene film.
である請求項１記載の表面保護フィルム。(2) Linear low density polyethylene has an MFR of 2 to 30
The surface protection film according to claim 1.
により積層状態に成形されたものである請求項１記載の
表面保護フィルム。(3) The surface protection film according to claim 1, wherein the adhesive layer and the polyethylene film are formed into a laminated state by coextrusion.
およびテルペンフェノール樹脂からなる群から選ばれた
ものである請求項１記載の表面保護フィルム。(4) The tackifier is a hydrogenated terpene resin, a terpene resin,
The surface protection film according to claim 1, which is selected from the group consisting of and terpene phenol resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1182443A JP2952312B2 (en) | 1989-07-17 | 1989-07-17 | Surface protection film for synthetic resin plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1182443A JP2952312B2 (en) | 1989-07-17 | 1989-07-17 | Surface protection film for synthetic resin plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0347886A true JPH0347886A (en) | 1991-02-28 |
| JP2952312B2 JP2952312B2 (en) | 1999-09-27 |
Family
ID=16118357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1182443A Expired - Lifetime JP2952312B2 (en) | 1989-07-17 | 1989-07-17 | Surface protection film for synthetic resin plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2952312B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0455488A (en) * | 1990-06-22 | 1992-02-24 | Sekisui Chem Co Ltd | Surface-protective film |
| JPH09183954A (en) * | 1995-11-01 | 1997-07-15 | Sekisui Chem Co Ltd | Surface protective film for acrylic plate |
| JP2001303005A (en) * | 2000-04-20 | 2001-10-31 | Sun A Kaken Co Ltd | Surface protective film for polycarbonate resin plate |
| US6668721B2 (en) | 2001-03-05 | 2003-12-30 | Miyakoshi Printing Machinery Co., Ltd. | Rotary printing press capable of nonstop printing during a change of printing plates |
| WO2011129167A1 (en) | 2010-04-13 | 2011-10-20 | 東レフィルム加工株式会社 | Surface protective film |
| KR20160126973A (en) | 2014-02-28 | 2016-11-02 | 도레이 필름 카코우 가부시키가이샤 | Surface protection film for heating process |
| JP2020015855A (en) * | 2018-07-26 | 2020-01-30 | 東洋インキＳｃホールディングス株式会社 | Adhesive resin composition, and sheet, lid material and member set for sealing container using the same, and openable container |
-
1989
- 1989-07-17 JP JP1182443A patent/JP2952312B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0455488A (en) * | 1990-06-22 | 1992-02-24 | Sekisui Chem Co Ltd | Surface-protective film |
| JPH09183954A (en) * | 1995-11-01 | 1997-07-15 | Sekisui Chem Co Ltd | Surface protective film for acrylic plate |
| JP2001303005A (en) * | 2000-04-20 | 2001-10-31 | Sun A Kaken Co Ltd | Surface protective film for polycarbonate resin plate |
| US6668721B2 (en) | 2001-03-05 | 2003-12-30 | Miyakoshi Printing Machinery Co., Ltd. | Rotary printing press capable of nonstop printing during a change of printing plates |
| WO2011129167A1 (en) | 2010-04-13 | 2011-10-20 | 東レフィルム加工株式会社 | Surface protective film |
| KR20160126973A (en) | 2014-02-28 | 2016-11-02 | 도레이 필름 카코우 가부시키가이샤 | Surface protection film for heating process |
| JP2020015855A (en) * | 2018-07-26 | 2020-01-30 | 東洋インキＳｃホールディングス株式会社 | Adhesive resin composition, and sheet, lid material and member set for sealing container using the same, and openable container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2952312B2 (en) | 1999-09-27 |
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