JPH0577364A - Release sheet - Google Patents
Release sheetInfo
- Publication number
- JPH0577364A JPH0577364A JP3243447A JP24344791A JPH0577364A JP H0577364 A JPH0577364 A JP H0577364A JP 3243447 A JP3243447 A JP 3243447A JP 24344791 A JP24344791 A JP 24344791A JP H0577364 A JPH0577364 A JP H0577364A
- Authority
- JP
- Japan
- Prior art keywords
- release
- layer
- silicone
- fluorosilicone
- release sheet
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2427/00—Presence of halogenated polymer
- C09J2427/005—Presence of halogenated polymer in the release coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/005—Presence of polysiloxane in the release coating
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、シリコーン粘着テー
プ，シリコーン粘着シートまたはシリコーン粘着ラベル
もしくはシリコーンフィルムキャスティングに用いて好
適な剥離シートに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silicone pressure-sensitive adhesive tape, a silicone pressure-sensitive adhesive sheet or a release sheet suitable for use in a silicone pressure-sensitive adhesive label or silicone film casting.
【０００２】[0002]
【従来の技術】従来の剥離シートは、剥離シート基材の
片面もしくは両面に剥離剤であるフルオロシリコーンが
単層に塗工されたものであった。2. Description of the Related Art A conventional release sheet has a release sheet substrate coated with a single layer of fluorosilicone as a release agent on one or both sides.
【０００３】[0003]
【発明が解決しようとする課題】剥離剤であるフルオロ
シリコーンが剥離シート基材上に単層で塗工された従来
の剥離シートの構成では、シリコーン粘着剤に対して優
れた剥離性（実用剥離強度は、約１５０ｇ／２ｃｍ以下
である。）を得るには、フルオロシリコーン剥離層の厚
みが１μｍ以上必要としていた。In the conventional release sheet constitution in which fluorosilicone, which is a release agent, is applied as a single layer on a release sheet substrate, it has excellent release properties (practical release The strength of the fluorosilicone release layer was required to be 1 μm or more in order to obtain a strength of about 150 g / 2 cm or less.
【０００４】一般に、シリコーン粘着テープ，シートま
たはラベル等の粘着テープ製品の製造は、シリコーン粘
着剤が剥離シート上に直接塗工され、次に粘着剤を加熱
・硬化し、さらに表面基材と貼り合わされて製造される
ことが多い。この製造方法においては、特に剥離剤であ
るフルオロシリコーンの塗工層の厚みを厚くする必要が
あった。しかし、剥離剤であるフルオロシリコーンを１
μｍ以上塗工したものでは、剥離シート基材から剥離剤
フルオロシリコーンが剥がれおちる現象（フルオロシリ
コーン層を指でこすると剥離層が基材からとれる脱落現
象）がみられる。このような脱落現象を伴う剥離シート
では、シリコーン粘着剤と接合後、剥がされる時に適正
で安定した剥離性能が得られなくなるばかりでなく、場
合によっては剥がれない剥離トラブルを起こしやすい。
また、たとえ剥がれたとしても剥離シート基材から脱落
した剥離剤が粘着剤層側に取られてしまい、粘着剤の粘
着物性を著しく低下してしまうという問題点がある。ま
た、剥離剤とシート基材の投描効果を高めるために、シ
ート基材にマット加工，エンボス加工等の処理をする方
法もあるが、剥離剤フルオロシリコーンのシート基材か
らの脱落現象を抑制するには充分な効果はない。Generally, in the production of adhesive tape products such as silicone adhesive tapes, sheets or labels, the silicone adhesive is directly coated on the release sheet, and then the adhesive is heated and cured, and then adhered to the surface substrate. Often combined and manufactured. In this manufacturing method, it was necessary to increase the thickness of the coating layer of fluorosilicone, which is a release agent. However, the release agent fluorosilicone
In the case of coating with a thickness of at least μm, a phenomenon in which the release agent fluorosilicone is peeled off from the release sheet base material (a phenomenon in which the release layer comes off from the base material when the fluorosilicone layer is rubbed with a finger) is observed. A release sheet accompanied by such a dropping phenomenon is not only unable to obtain proper and stable release performance when it is peeled off after being bonded with a silicone adhesive, but in some cases, a peeling trouble of not peeling off easily occurs.
Further, even if it is peeled off, the release agent that has fallen off the release sheet base material is taken up by the pressure-sensitive adhesive layer side, and the adhesive physical properties of the pressure-sensitive adhesive are significantly lowered. There is also a method of performing matting, embossing, etc. on the sheet base material in order to enhance the effect of drawing the release agent and the sheet base material, but it prevents the release agent fluorosilicone from falling off the sheet base material. There is not enough effect to do.
【０００５】上記のようなフルオロシリコーン剥離層が
剥離シートからとれてしまう脱落現象を伴う剥離シート
では、シリコーン粘着剤と接合後、ラベル・シートまた
はテープ等に加工後、剥離シートが剥がされるときに、
剥離剤が剥離シート基材から取れてしまい、良好な剥離
性能が得られないばかりでなく、取られた剥離剤が粘着
剤側へ移行し、粘着剤の粘着物性を著しく低下させてし
まうという問題点を有していた。In a release sheet with a dropping phenomenon in which the fluorosilicone release layer comes off from the release sheet as described above, when the release sheet is peeled off after being bonded to a silicone adhesive and processed into a label sheet or tape. ,
The problem that the release agent comes off from the release sheet base material, and not only good release performance is not obtained, but also the removed release agent moves to the pressure-sensitive adhesive side, and the adhesive property of the pressure-sensitive adhesive is remarkably lowered. Had a point.
【０００６】これに対し、剥離剤であるフルオロシリコ
ーンの塗工厚を１μｍ以下と薄くすると、剥離剤がシー
ト基材からの脱落現象はみられなくなるが、シリコーン
剥離剤に対する剥離性能が劣ってしまう。特にシリコー
ン粘着剤が剥離シート上に直接塗工され、ラベル，シー
トまたはテープ等に加工される製造方法においては、剥
離シートがシリコーン粘着剤層から剥がされるときに剥
がれなくなるという問題点を有していた。On the other hand, when the coating thickness of fluorosilicone, which is a release agent, is as thin as 1 μm or less, the release agent does not drop from the sheet base material, but the release performance with respect to the silicone release agent deteriorates. .. In particular, in a manufacturing method in which a silicone adhesive is directly coated on a release sheet and processed into a label, a sheet, a tape, or the like, there is a problem that the release sheet does not come off when peeled from the silicone adhesive layer. It was
【０００７】[0007]
【課題を解決するための手段】以上、従来の剥離シート
の問題点である剥離剤の基材からの脱落およびシリコー
ン粘着剤に対する剥離性を解決するために、本発明者ら
は、剥離剤の基材からの脱落がなく、かつシリコーン粘
着剤に対する優れた剥離性能が得られることを目的に種
々検討を行った。その結果、シート基材に単層で塗工・
形成されていたフルオロシリコーン剥離層に代えて、１
層以上のシリコーン層を新しく設け、さらに、その最外
層にフルオロシリコーン剥離層を設けることにより、フ
ルオロシリコーン剥離剤のシート基材からの脱落がなく
かつシリコーン粘着剤に対して優れた剥離性能を有する
ことを見い出した。As described above, in order to solve the problems of the conventional release sheet, such as the release of the release agent from the base material and the release property with respect to the silicone adhesive, the present inventors have Various investigations were carried out for the purpose of obtaining excellent release performance with respect to the silicone adhesive without dropping off from the base material. As a result, a single layer is applied to the sheet base material.
1 instead of the formed fluorosilicone release layer
By providing a new silicone layer of at least two layers and further providing a fluorosilicone release layer as the outermost layer, the fluorosilicone release agent does not fall off from the sheet base material and has excellent release performance for silicone adhesives. I found a thing.
【０００８】本発明は、まず、第１に剥離シート基材と
剥離剤フルオロシリコーン層との間にシリコーンを主成
分とする接着増強層を有する剥離シートであり、従来の
剥離シートに比べ基材と剥離剤との密着性に優れるもの
である。上記の接着増強層としては、ジメチルポリシロ
キサンを主成分とするもので、従来から公知の剥離シー
ト用シリコーンが使用でき、接着増強層のシリコーンの
中には、接着増強層としての性能を損わない範囲にてシ
リコーン以外の成分、例えば、アルキド，ＳＢＲ，アク
リル，ポリ酢酸ビニル，ＥＶＡ，ポリブタジエン，イソ
プレンゴム，ブチルゴム，エチレン・プロピレン共重合
体，充填物等が共重合・ブレンドされてもよい。First, the present invention is a release sheet having an adhesion enhancing layer containing silicone as a main component between a release sheet base material and a release agent fluorosilicone layer. The adhesiveness between the release agent and the release agent is excellent. The above-mentioned adhesion-enhancing layer contains dimethylpolysiloxane as a main component, and conventionally known silicones for release sheets can be used. Among the silicones in the adhesion-enhancing layer, the performance as an adhesion-enhancing layer is impaired. Components other than silicone, such as alkyd, SBR, acrylic, polyvinyl acetate, EVA, polybutadiene, isoprene rubber, butyl rubber, ethylene / propylene copolymer, and filler may be copolymerized / blended to the extent that they do not exist.
【０００９】また、シリコーンは、特に限定はないが、
付加反応型シリコーンが、硬化性および基材との密着性
の点で好ましい。The silicone is not particularly limited,
Addition reaction type silicone is preferable in terms of curability and adhesion to a substrate.
【００１０】接着増強層の厚みとしては、０．０１〜１
０μｍ、望ましくは０．１〜１μｍが良い。フルオロシ
リコーンとしては、従来よりシリコーン粘着剤用剥離剤
として知られているものが使用でき、特開平１−１５４
７４０号に記載のものがあり、市販製品としては信越化
学工業製Ｘ−７０−２０１が知られている。また、フル
オロシリコーン剥離剤の厚みは本発明ではシリコーンの
接着増強層があるため、その厚みを１．０μｍ以上とし
ても基材からの脱落がないので０．２〜１０μｍ、コス
ト等の点から望ましくは０．５〜２μｍが良い。The thickness of the adhesion enhancing layer is 0.01 to 1
0 μm, preferably 0.1 to 1 μm. As the fluorosilicone, those conventionally known as release agents for silicone adhesives can be used.
No. 740, and X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd. is known as a commercially available product. Further, the thickness of the fluorosilicone release agent in the present invention is 0.2 to 10 μm because it does not fall off from the substrate even if the thickness is 1.0 μm or more because of the silicone adhesion enhancing layer, which is desirable from the viewpoint of cost and the like. Is preferably 0.5 to 2 μm.
【００１１】本発明の剥離シートを得るには、まずシー
ト基材上に接着増強層としてシリコーンを従来公知の方
法で塗布し、これを加熱硬化させ、さらに剥離剤である
フルオロシリコーンを接着増強層の上に従来の公知方
法、例えば、バー塗工，グラビア塗工，エアナイフ塗
工，その他のロール塗工などで塗布し、同様に加熱硬化
させる。シリコーンの塗工液はエマルジョン，有機溶剤
型，無溶剤型、何れでもよい。また、シリコーン粘着剤
の剥離剤として用いられるフルオロシリコーンは有機溶
剤型が一般的であり、シリコーンおよびフルオロシリコ
ーンの硬化方法も従来公知の方法でよい。たとえば熱硬
化が一般的である。In order to obtain the release sheet of the present invention, first, silicone is applied to the sheet base material as an adhesion enhancing layer by a conventionally known method, this is heat-cured, and fluorosilicone as a release agent is further applied to the adhesion enhancing layer. It is applied by a known method such as bar coating, gravure coating, air knife coating, and other roll coating on the above, and similarly heat-cured. The silicone coating liquid may be an emulsion, an organic solvent type, or a solventless type. Further, the fluorosilicone used as the release agent for the silicone pressure-sensitive adhesive is generally an organic solvent type, and the method for curing the silicone and the fluorosilicone may be a conventionally known method. For example, heat curing is common.
【００１２】また、本発明では、剥離シート基材の少な
くとも一方の面に、ＪＩＳ Ｋ７２１３試験による剪断
弾性率が１×１０7 ｄｙｎ／ｃｍ2 以下であるシリコー
ンを１層以上塗工し、さらにその最外層に剥離剤である
フルオロシリコーン層を設けたことにより、剥離シート
基材とフルオロシリコーン剥離層との密着性が良くなる
他に、シリコーン粘着剤に対し、より優れた剥離性能を
得ることができる。弾性率が１×１０7 ｄｙｎ／ｃｍ2
以上のシリコーン層を基材とフルオロシリコーン層との
間に設けた剥離シートでは、シリコーン粘着剤に対する
より優れた剥離性能は得がたい。基材とフルオロシリコ
ーン層との間に設けるシリコーン層は、弾性率が１×１
０7 ｄｙｎ／ｃｍ2 以下である皮膜の柔らかいシリコー
ンを用いなければ、本発明の目的であるより優れた剥離
性能は達し得ない。Further, in the present invention, at least one surface of the release sheet base material is coated with one or more layers of silicone having a shear modulus of 1 × 10 7 dyn / cm 2 or less according to JIS K7213 test. By providing a fluorosilicone layer, which is a release agent, on the outermost layer, in addition to improving the adhesion between the release sheet base material and the fluorosilicone release layer, it is possible to obtain more excellent release performance with respect to the silicone adhesive. it can. Elastic modulus is 1 × 10 7 dyn / cm 2
The release sheet having the above silicone layer provided between the base material and the fluorosilicone layer is difficult to obtain a better release performance with respect to the silicone adhesive. The silicone layer provided between the base material and the fluorosilicone layer has an elastic modulus of 1 × 1.
The release performance superior to the object of the present invention cannot be achieved without using a soft silicone film having a film thickness of 0 7 dyn / cm 2 or less.
【００１３】本発明においては、上記の剥離シート基材
とフルオロシリコーン層との間に設けられた１層以上の
弾性率を特定した場合のシリコーン層の厚みは、少なく
とも１μｍ以上必要であり、望ましくは２〜５μｍが良
い。この場合の上記フルオロシリコーン剥離層の厚み
は、０．２〜０．６μｍ程度で良い。なお、フルオロシ
リコーン層の厚みを０．６μｍ以上塗工しても本発明の
効果になんら支障はないが、フルオロシリコーン剥離剤
を必要以上塗工するのは経済的でない。In the present invention, when the elastic modulus of at least one layer provided between the release sheet base material and the fluorosilicone layer is specified, the thickness of the silicone layer must be at least 1 μm or more, which is desirable. Is preferably 2 to 5 μm. In this case, the fluorosilicone release layer may have a thickness of about 0.2 to 0.6 μm. Even if the thickness of the fluorosilicone layer is 0.6 μm or more, the effect of the present invention is not hindered, but it is not economical to apply the fluorosilicone release agent more than necessary.
【００１４】上記シリコーンおよびフルオロシリコーン
は前記したような公知のものが使用できる。また、本発
明の特定の剪断弾性率を有する剥離シートは前記したよ
うな公知の方法で製造して得ることができる。The above-mentioned known silicones and fluorosilicones can be used. Further, the release sheet having a specific shear elastic modulus of the present invention can be produced by the known method as described above.
【００１５】本発明の剥離シート基材としては、従来公
知のものが使用できる。たとえばＰＥＴフィルム，ＯＰ
Ｐフィルムなどの合成樹脂フィルム，紙たとえばグラシ
ン紙，ＰＥラミネート紙，ＰＶＡ・デンプン等のアンダ
ーコート紙等が挙げられる。As the release sheet base material of the present invention, conventionally known materials can be used. For example PET film, OP
Examples thereof include synthetic resin films such as P film, paper such as glassine paper, PE laminated paper, and undercoat paper such as PVA / starch.
【００１６】なお、本発明のシリコーン層およびフルオ
ロシリコーン剥離層は、シート基材の片面でも両面でも
よい。場合によっては、フルオロシリコーン層／シリコ
ン層／シート基材／フルオロシリコーン層の構成でもよ
い。The silicone layer and fluorosilicone release layer of the present invention may be on one side or both sides of the sheet substrate. Depending on the case, the constitution of fluorosilicone layer / silicon layer / sheet substrate / fluorosilicone layer may be adopted.
【００１７】[0017]
【作用】本発明によれば、基材と剥離剤との密着性が高
く、剥離剤フルオロシリコーンの基材からの脱落がな
く、かつ剥離性能に優れた剥離シートを得ることができ
る。According to the present invention, it is possible to obtain a release sheet which has high adhesion between the base material and the release agent, does not drop off the release agent fluorosilicone from the base material, and has excellent release performance.
【００１８】[0018]
【実施例】以下、図面を参照して本発明の実施例を詳細
に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１９】（実施例１）厚さ５０μｍのＰＥＴフィル
ムの片面に、従来と同様にして、シリコーンを塗工し、
１５０℃・３０ｓｅｃ加熱硬化させ、厚さ０．２μｍの
接着増強層とした。さらにこの接着増強層の表面にシリ
コーンＰＳＡ用剥離剤であるフルオロシリコーン（信越
化学工業製Ｘ−７０−２０１）を塗工し、１５０℃・６
０ｓｅｃ加熱硬化させ、厚さ１．０μｍの剥離層とし、
剥離シートを作成した。Example 1 Silicone was coated on one side of a PET film having a thickness of 50 μm in the same manner as in the conventional method,
It was heated and cured at 150 ° C. for 30 seconds to form an adhesion-enhancing layer having a thickness of 0.2 μm. Further, fluorosilicone (X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd.), which is a release agent for silicone PSA, is applied to the surface of the adhesion enhancing layer, and the temperature is 150 ° C. · 6.
Heat-curing for 0 sec to form a release layer having a thickness of 1.0 μm,
A release sheet was created.
【００２０】この剥離シートの剥離層面を４０℃×９５
％ＲＨ雰囲気に暴露し、剥離層と剥離シート基材との密
着性を調べた結果、１カ月後においても剥離層のシート
基材からの脱落現象はみられず、密着性は良好であっ
た。しかも、シリコーン系粘着剤に対する剥離性も良好
であった。The release layer surface of this release sheet is 40 ° C. × 95.
The adhesiveness between the release layer and the release sheet base material was examined by exposing it to a% RH atmosphere, and the release layer did not drop off from the sheet base material even after one month, and the adhesiveness was good. .. Moreover, the releasability from the silicone adhesive was also good.
【００２１】（実施例２）実施例１のＰＥＴフィルムの
代わりに、厚さ６４μｍのＯＰＰフィルムを用い、他は
実施例１と同じ方法で剥離シートを作成した。Example 2 A release sheet was prepared in the same manner as in Example 1 except that an OPP film having a thickness of 64 μm was used instead of the PET film in Example 1.
【００２２】この剥離シートの密着性も実施例１の場合
と同様良好であった。The adhesion of this release sheet was also good as in Example 1.
【００２３】（実施例３）実施例１のＰＥＴフィルムの
代わりに、グラシン紙（坪量８５ｇ／ｍ2 ）を用い、他
は実施例１と同じ方法で剥離シートを作成した。Example 3 A release sheet was prepared in the same manner as in Example 1 except that glassine paper (basis weight: 85 g / m 2 ) was used instead of the PET film in Example 1.
【００２４】この剥離シートの密着性も実施例１の場合
と同様良好であった。The adhesion of this release sheet was also good as in Example 1.
【００２５】（比較例１）厚さ５０μｍのＰＥＴフィル
ムの片面にフルオロシリコーンを塗工し、１５０℃・６
０ｓｅｃ加熱硬化させ、厚み１．０μｍの剥離層とし、
剥離シートを作成した。(Comparative Example 1) Fluorosilicone was coated on one side of a PET film having a thickness of 50 μm, and the temperature was 150 ° C. × 6.
Heat-curing for 0 sec to form a release layer with a thickness of 1.0 μm,
A release sheet was created.
【００２６】この剥離シートの密着性は、４０℃・９５
％ＲＨ雰囲気下で１週間でシート基材からの剥離剤の脱
落現象がみられた。The adhesiveness of this release sheet is 40 ° C./95
The phenomenon of falling of the release agent from the sheet base material was observed after 1 week in the% RH atmosphere.
【００２７】（実施例４）剥離シート基材である厚さ５
０μｍのＰＥＴフィルムの一方の面に剪断弾性率（ＪＩ
Ｓ Ｋ７２１３）が４．０×１０6 ｄｙｎ／ｃｍ2 であ
るシリコーンを塗工し、１５０℃・６０ｓｅｃで加熱硬
化させ、厚み３．０μｍのシリコーン層を形成させた。
さらに、前記シリコーン層の上にフルオロシリコーン
（信越化学工業製Ｘ−７０−２０１）を塗工し、１５０
℃・６０ｓｅｃで加熱硬化させ、厚み０．２μｍの剥離
層を形成させ、剥離シートとした。(Example 4) Thickness 5 which is a release sheet base material
The shear modulus (JI
Silicone having a SK7213) of 4.0 × 10 6 dyn / cm 2 was applied and heat-cured at 150 ° C. for 60 seconds to form a silicone layer having a thickness of 3.0 μm.
Further, fluorosilicone (X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd.) is coated on the silicone layer,
The release sheet was heat-cured at 60 ° C. for 60 seconds to form a release layer having a thickness of 0.2 μm to obtain a release sheet.
【００２８】（実施例５）実施例１のフルオロシリコー
ン層の厚みを０．６μｍにする以外はすべて実施例４の
条件にて剥離シートを作成した。Example 5 A release sheet was prepared under the same conditions as in Example 4, except that the thickness of the fluorosilicone layer in Example 1 was changed to 0.6 μm.
【００２９】（実施例６）剥離シート基材である厚さ５
０μｍのＰＥＴフィルムの一方の表面に剪断弾性率（Ｊ
ＩＳ Ｋ７２１３）が８．０×１０6 ｄｙｎ／ｃｍ2 で
あるシリコーンを塗工し、１５０℃・６０ｓｅｃで加熱
硬化させ、厚み３．０μｍのシリコーン層を形成させ
た。さらに、このシリコーン層の上にフルオロシリコー
ン（信越化学工業製Ｘ−７０−２０１）を塗工し、１５
０℃・６０ｓｅｃで加熱硬化させ、厚み０．６μｍの剥
離層を形成させ、剥離シートとした。(Example 6) Thickness 5 which is a release sheet base material
The shear modulus (J
A silicone having IS K7213) of 8.0 × 10 6 dyn / cm 2 was applied and heat-cured at 150 ° C. for 60 seconds to form a silicone layer having a thickness of 3.0 μm. Further, fluorosilicone (X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd.) is coated on this silicone layer,
The release sheet was heat-cured at 0 ° C. for 60 seconds to form a release layer having a thickness of 0.6 μm to obtain a release sheet.
【００３０】（実施例７）剥離シート基材である厚さ５
０μｍのＰＥＴフィルムの一方の面に剪断弾性率（ＪＩ
Ｓ Ｋ７２１３）が１．０×１０7 ｄｙｎ／ｃｍ2 であ
るシリコーンを塗工し、１５０℃・６０ｓｅｃで加熱硬
化させ、厚み３．０μｍのシリコーン層を形成させた。
さらにこのシリコーン層の上にフルオロシリコーン（信
越化学工業製Ｘ−７０−２０１）を塗工し、１５０℃・
６０ｓｅｃで加熱硬化させ、厚み０．６μｍの剥離層を
形成させ、剥離シートとした。Example 7 A release sheet substrate having a thickness of 5
The shear modulus (JI
Silicone having a SK7213) of 1.0 × 10 7 dyn / cm 2 was applied and heat-cured at 150 ° C. for 60 seconds to form a silicone layer having a thickness of 3.0 μm.
Furthermore, fluorosilicone (X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd.) is coated on this silicone layer, and the temperature is 150 ° C.
It was heat-cured for 60 seconds to form a release layer having a thickness of 0.6 μm to obtain a release sheet.
【００３１】（実施例８）剥離シート基材である厚み５
０μｍのＰＥＴフィルムの一方の面に剪断弾性率（ＪＩ
Ｓ Ｋ７２１３）が４．０×１０6 ｄｙｎ／ｃｍ2 であ
るシリコーンを塗工し、１５０℃・６０ｓｅｃで加熱硬
化させ、厚み１．５μｍのシリコーン層を形成させた。
さらに、このシリコーン層の上にフルオロシリコーン
（信越化学工業製Ｘ−７０−２０１）を塗工し、１５０
℃・６０ｓｅｃで加熱硬化させ、厚み０．６μｍの剥離
層を形成させて剥離シートを得た。(Example 8) Thickness 5 which is a release sheet base material
The shear modulus (JI
A silicone having a SK7213) of 4.0 × 10 6 dyn / cm 2 was applied and heat-cured at 150 ° C. for 60 seconds to form a silicone layer having a thickness of 1.5 μm.
Further, fluorosilicone (X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd.) is coated on the silicone layer to form 150
The release sheet was obtained by heating and curing at 60 ° C. for 60 seconds to form a release layer having a thickness of 0.6 μm.
【００３２】（比較例２）剥離シート基材である厚さ５
０μｍのＰＥＴフィルムの一方の面にフルオロシリコー
ン（信越化学工業製Ｘ−７０−２０１）を直接塗工し、
１５０℃・６０ｓｅｃで加熱硬化させ、厚み０．２μｍ
の剥離層を形成させ、剥離シートを得た。(Comparative Example 2) Thickness 5 which is a release sheet base material
Fluorosilicone (X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd.) is directly coated on one surface of a 0 μm PET film,
Heat-cured at 150 ° C for 60 seconds, thickness 0.2 μm
The release layer was formed to obtain a release sheet.
【００３３】（比較例３）比較例１で用いた剥離剤フル
オロシリコーンの塗工厚を０．６μｍとする以外は、す
べて比較例２と同じ条件にて剥離シートを作成した。Comparative Example 3 A release sheet was prepared under the same conditions as in Comparative Example 2 except that the release agent fluorosilicone used in Comparative Example 1 had a coating thickness of 0.6 μm.
【００３４】（比較例４）比較例１で用いた剥離剤フル
オロシリコーンの塗工厚を１．２μｍとする以外は、す
べて比較例２と同じ条件にて剥離シートを作成した。Comparative Example 4 A release sheet was prepared under the same conditions as in Comparative Example 2 except that the coating thickness of the release agent fluorosilicone used in Comparative Example 1 was 1.2 μm.
【００３５】（比較例５）剥離シート基材である厚さ５
０μｍのＰＥＴフィルムの一方の面に剪断弾性率（ＪＩ
Ｓ Ｋ７２１３）が１．５×１０7 ｄｙｎ／ｃｍ2 であ
るシリコーンを塗工し、１５０℃・６０ｓｅｃで加熱硬
化させ、厚み３μｍのシリコーン層を形成させた。さら
に、このシリコーン層の上にフルオロシリコーン（信越
化学工業製Ｘ−７０−２０１）を塗工し、１５０℃・６
０ｓｅｃで加熱硬化させ、厚み０．６μｍの剥離層を形
成させ、剥離シートとした。(Comparative Example 5) Thickness 5 which is a release sheet base material
The shear modulus (JI
Silicone having a SK7213) of 1.5 × 10 7 dyn / cm 2 was applied and heat-cured at 150 ° C. for 60 seconds to form a silicone layer having a thickness of 3 μm. Further, fluorosilicone (X-70-201 manufactured by Shin-Etsu Chemical Co., Ltd.) is coated on this silicone layer, and the temperature is 150 ° C. × 6.
The release sheet was heat-cured for 0 sec to form a release layer having a thickness of 0.6 μm to obtain a release sheet.
【００３６】以上実施例４〜８、比較例２〜５で得た剥
離シートについて、シリコーン粘着剤に対する剥離強度
および剥離剤フルオロシリコーンの剥離シート基材から
の脱落の有無を調べた。結果を表１，２に示した。With respect to the release sheets obtained in Examples 4 to 8 and Comparative Examples 2 to 5, the peel strength with respect to the silicone adhesive and the presence or absence of the release agent fluorosilicone from the release sheet substrate were examined. The results are shown in Tables 1 and 2.
【００３７】なお、本発明における剪断弾性率の測定方
法は、ＪＩＳ Ｋ７２１３試験の方法で、剪断弾性率を
測定した。測定雰囲気は温度２３±２℃、相対湿度５０
±５％とした。The shear modulus of elasticity in the present invention was measured by the JIS K7213 test method. The measurement atmosphere has a temperature of 23 ± 2 ° C and a relative humidity of 50.
It was set to ± 5%.
【００３８】[0038]
【表１】 [Table 1]
【００３９】[0039]
【表２】 [Table 2]
【００４０】＊…剥離強度 剥離シートの剥離処理面上にシリコーン粘着剤（トーレ
・ダウコーニング・シリコーン製ＳＤ−４５８０）を塗
工し、１３０℃・２分加熱硬化し、塗工厚５０μｍのシ
リコーン粘着剤層とし、表面基材５０μｍ厚さＰＥＴフ
ィルムを貼り合わせ、粘着シートとした。このシートを
７０℃の雰囲気下、１００ｇ／ｃｍ2 加圧条件にて７ｄ
ａｙｓ老化し、万能引張試験機にて１８０°表面基材ピ
ールで剥離強度（クロスヘットスピード０．３ｍ／分）
を測定した。* ... Peel strength A silicone adhesive (SD-4580 made by Toray Dow Corning Silicone) is coated on the release-treated surface of the release sheet and heat-cured at 130 ° C for 2 minutes to give a silicone coating having a thickness of 50 µm. As the pressure-sensitive adhesive layer, a PET film having a thickness of 50 μm on the surface substrate was attached to obtain a pressure-sensitive adhesive sheet. This sheet is placed in an atmosphere of 70 ° C. under a pressure of 100 g / cm 2 for 7 d
ays aging, peel strength with 180 ° surface base material peeling with a universal tensile tester (crosshead speed 0.3 m / min)
Was measured.
【００４１】＊＊…フルオロシリコーンの密着性 上記剥離シートを４０℃・９５％ＲＨ雰囲気下、７ｄａ
ｙｓ老化後、フルオロシリコーン層を指でこすり、フル
オロシリコーン層のシート基材からの取られ，脱落現象
の有無を観察した。** ... Adhesion of Fluorosilicone The release sheet was placed in an atmosphere of 40 ° C. and 95% RH for 7 da.
After the aging of ys, the fluorosilicone layer was rubbed with a finger, and the presence or absence of the phenomenon of the fluorosilicone layer being removed from the sheet substrate and observed.
【００４２】（評価） ○…脱落なし ×…脱落あり(Evaluation) ○: No dropout ×: Dropout
【００４３】[0043]
【発明の効果】従来の剥離シートの構成である剥離シー
ト基材に剥離剤であるフルオロシリコーンを単層で塗工
したものでは、剥離剤フルオロシリコーンが基材から脱
落し易いあるいはシリコーン粘着剤に対して剥離性能が
不充分といういずれかの問題点を有しており、両者の問
題点を同時に満足する剥離シートは存在しなかった。EFFECTS OF THE INVENTION When a single layer of fluorosilicone, which is a release agent, is applied to a release sheet base material having a conventional release sheet structure, the release agent fluorosilicone easily drops off from the base material or becomes a silicone adhesive. On the other hand, there is a problem that the peeling performance is insufficient, and there is no release sheet that satisfies both problems at the same time.
【００４４】従来の剥離シートに対して、剥離シート基
材と剥離剤フルオロシリコーン層との間に（ある特定の
弾性率を有する）シリコーン層を設けることにより上記
問題点を同時に解消した新規の剥離シートを提供したの
が本発明である。In contrast to the conventional release sheet, a new release that simultaneously solves the above problems by providing a silicone layer (having a specific elastic modulus) between the release sheet base material and the release agent fluorosilicone layer. It is the present invention that provided a sheet.
【００４５】シリコーン粘着剤用剥離剤フルオロシリコ
ーンを直接剥離シート基材上に配設した従来の剥離シー
トに比べ、本発明品は基材と剥離剤との密着性に優れ、
剥離剤が基材面側から取られたり、剥離困難となる剥離
トラブルを生じることなく、安定な剥離特性が得られ
る。Release Agent for Silicone Adhesives Compared with a conventional release sheet in which fluorosilicone is directly placed on a release sheet substrate, the product of the present invention has excellent adhesion between the substrate and the release agent,
Stable release characteristics can be obtained without the release agent being removed from the base material surface side or the release trouble that makes release difficult.
【図１】フルオロシリコーン剥離層が単層である従来の
剥離シートの断面図である。FIG. 1 is a cross-sectional view of a conventional release sheet having a single fluorosilicone release layer.
【図２】本発明の剥離シートの断面図である。FIG. 2 is a cross-sectional view of the release sheet of the present invention.
【図３】本発明の剥離シートの断面図である。FIG. 3 is a cross-sectional view of a release sheet of the present invention.
【図４】本発明の剥離シートの断面図である。FIG. 4 is a cross-sectional view of the release sheet of the present invention.
１ 剥離シート基材 ２ シリコーン層（シリコーンを主成分とする接着増強
層） ３ フルオロシリコーン層1 Release Sheet Base Material 2 Silicone Layer (Adhesion Enhancement Layer Containing Silicone as Main Component) 3 Fluorosilicone Layer
Claims (4)
シリコーンの処理層が設けられ、このシリコーン層の上
にフルオロシリコーン系の剥離層が形成されていること
を特徴とする剥離シート。1. A release sheet comprising a release sheet substrate having a treated layer of silicone on at least one surface thereof, and a fluorosilicone release layer formed on the silicone layer.
Ｋ７２１３）が１×１０7 ｄｙｎ／ｃｍ2 以下である
ことを特徴とする請求項１に記載の剥離シート。2. The shear modulus of elasticity of the silicone layer (JIS
The release sheet according to claim 1, wherein K7213) is 1 × 10 7 dyn / cm 2 or less.
を特徴とする請求項１または２に記載の剥離シート。3. The release sheet according to claim 1, wherein the silicone layer comprises a plurality of layers.
サンを主成分とするシリコーンからなることを特徴とす
る請求項１ないし３に記載の剥離シート。4. The release sheet according to claim 1, wherein the silicone layer is made of silicone containing dimethylpolysiloxane as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3243447A JP2584918B2 (en) | 1991-09-24 | 1991-09-24 | Release sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3243447A JP2584918B2 (en) | 1991-09-24 | 1991-09-24 | Release sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0577364A true JPH0577364A (en) | 1993-03-30 |
| JP2584918B2 JP2584918B2 (en) | 1997-02-26 |
Family
ID=17104019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3243447A Expired - Fee Related JP2584918B2 (en) | 1991-09-24 | 1991-09-24 | Release sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2584918B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000033664A (en) * | 1998-07-17 | 2000-02-02 | Rabo:Kk | Plural-layer laminated type sheet material |
| JP2008273154A (en) * | 2007-05-07 | 2008-11-13 | Roland Dg Corp | Three-dimensional shaping apparatus |
| JP2011201033A (en) * | 2010-03-24 | 2011-10-13 | Shin Etsu Polymer Co Ltd | Mold release film |
| JP2011201034A (en) * | 2010-03-24 | 2011-10-13 | Shin Etsu Polymer Co Ltd | Mold release film |
| JP2011201035A (en) * | 2010-03-24 | 2011-10-13 | Shin Etsu Polymer Co Ltd | Mold release film |
| WO2019117059A1 (en) * | 2017-12-11 | 2019-06-20 | 三菱ケミカル株式会社 | Layered film, release film, and layered body |
| WO2020121687A1 (en) * | 2018-12-11 | 2020-06-18 | 三菱ケミカル株式会社 | Release film |
-
1991
- 1991-09-24 JP JP3243447A patent/JP2584918B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000033664A (en) * | 1998-07-17 | 2000-02-02 | Rabo:Kk | Plural-layer laminated type sheet material |
| JP2008273154A (en) * | 2007-05-07 | 2008-11-13 | Roland Dg Corp | Three-dimensional shaping apparatus |
| JP2011201033A (en) * | 2010-03-24 | 2011-10-13 | Shin Etsu Polymer Co Ltd | Mold release film |
| JP2011201034A (en) * | 2010-03-24 | 2011-10-13 | Shin Etsu Polymer Co Ltd | Mold release film |
| JP2011201035A (en) * | 2010-03-24 | 2011-10-13 | Shin Etsu Polymer Co Ltd | Mold release film |
| WO2019117059A1 (en) * | 2017-12-11 | 2019-06-20 | 三菱ケミカル株式会社 | Layered film, release film, and layered body |
| WO2020121687A1 (en) * | 2018-12-11 | 2020-06-18 | 三菱ケミカル株式会社 | Release film |
| CN113015623A (en) * | 2018-12-11 | 2021-06-22 | 三菱化学株式会社 | Mold release film |
| JPWO2020121687A1 (en) * | 2018-12-11 | 2021-11-04 | 三菱ケミカル株式会社 | Release film |
| EP3895891A4 (en) * | 2018-12-11 | 2022-04-27 | Mitsubishi Chemical Corporation | Release film |
| CN113015623B (en) * | 2018-12-11 | 2023-09-15 | 三菱化学株式会社 | Release film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2584918B2 (en) | 1997-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5061308B2 (en) | Adhesive sheet | |
| TWI617641B (en) | Thermosensitive adhesive | |
| KR101318370B1 (en) | Release Sheet and Pressure-Sensitive Adhesive Article | |
| JP4273193B2 (en) | Double-sided adhesive sheet | |
| JP2000096007A (en) | Adhesive tape strip | |
| KR20190095869A (en) | Pressure sensitive adhesive sheet | |
| JP2584918B2 (en) | Release sheet | |
| JP4531911B2 (en) | Release sheet and adhesive | |
| JP2003080638A (en) | Release liner and double-faced tape using it | |
| KR101924445B1 (en) | Silicon-based adhesive tape and method of preparing the same | |
| JP4900928B2 (en) | Method for removing uncured silicone from protective film | |
| TWI831767B (en) | Heat-resistant pressure-sensitive adhesive sheet for semiconductor device production | |
| WO2003022572A1 (en) | Releasing sheet and pressure-sensitive adhesive article | |
| JP4321673B2 (en) | Temporary adhesive sheet for raw sheets for ceramic electronic components | |
| JP4215527B2 (en) | Self-adhesive film laminated with flexible polymer | |
| JP2001220562A (en) | Aluminum paper foil-based pressure-sensitive adhesive tape | |
| JP2017101095A (en) | Repeelable heat resistant absorption sheet | |
| JPH09230580A (en) | Production of self-adhesive film for protecting photomask | |
| JPH05117605A (en) | Releasable layer, pressure-sensitive adhesive member and separator | |
| JP2001354919A (en) | Double-sided self-adhesive tape | |
| JPH0738154U (en) | Transfer sticker | |
| US12031068B2 (en) | Adhesive tape with a poorly flowable pressure-sensitive adhesive and release liner based on a pressure-sensitive silicone coating | |
| JP2791927B2 (en) | Adhesive tape | |
| JP2018145297A (en) | Transparent adhesive label with release sheet | |
| JP2002127314A (en) | Sticking sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |