JP3384552B2 - Base film for pressure-sensitive adhesive sheet and method for producing the same - Google Patents
Base film for pressure-sensitive adhesive sheet and method for producing the sameInfo
- Publication number
- JP3384552B2 JP3384552B2 JP28114199A JP28114199A JP3384552B2 JP 3384552 B2 JP3384552 B2 JP 3384552B2 JP 28114199 A JP28114199 A JP 28114199A JP 28114199 A JP28114199 A JP 28114199A JP 3384552 B2 JP3384552 B2 JP 3384552B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- sensitive adhesive
- base film
- weight
- parts
- 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.)
- Expired - Fee Related
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- Materials For Medical Uses (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Adhesive Tapes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、粘着シート用基材
フィルムとその製造方法に関し、詳しくは、救急絆創膏
を含む皮膚貼付用粘着シートのための基材フィルムとし
て好適に用いることができる粘着シート用基材フィルム
とそのカレンダー加工による製造方法に関する。TECHNICAL FIELD The present invention relates to a base film for a pressure-sensitive adhesive sheet and a method for producing the same, and more specifically, a pressure-sensitive adhesive sheet which can be suitably used as a base film for a pressure-sensitive adhesive sheet for skin application including a first-aid bandage. TECHNICAL FIELD The present invention relates to a base film for use in manufacturing and a method for producing the same by calendaring.
【０００２】[0002]
【従来の技術】従来、柔軟な基材フィルム上に粘着剤層
を設けてなる皮膚貼付用粘着シートは、ドレッシング、
巻絆等として用いられているほか、粘着剤層の表面の中
央域にガーゼ等の吸液性パッドを設けることによって、
救急絆創膏として、一般家庭において、広く用いられて
いる。更に、種々の薬剤を含有させた粘着剤からなる層
を基材フィルム上に設けた粘着性皮膚貼付薬シートは、
種々の医療用途に用いられている。2. Description of the Related Art Conventionally, a pressure-sensitive adhesive sheet for skin application, which comprises an adhesive layer provided on a flexible base film, has been used for dressing,
In addition to being used as a winding bond, by providing a liquid-absorbent pad such as gauze in the central area of the surface of the adhesive layer,
Widely used as a first aid bandage in general households. Furthermore, an adhesive skin patch sheet provided with a layer made of an adhesive containing various agents on a base film,
It is used in various medical applications.
【０００３】このような皮膚貼付用粘着シートのための
基材フィルムとしては、従来、柔軟で皮膚になじみよい
ほか、印刷性にすぐれる等の点から、所謂軟質塩化ビニ
ル系樹脂からなるフィルムが広く用いられている。この
ような軟質塩化ビニル系樹脂は、安全性の観点から、従
来、可塑剤としては、エポキシ化大豆油が用いられ、安
定剤としては、一般的に、脂肪酸カルシウム−脂肪酸亜
鉛系安定剤が用いられている。しかしながら、このよう
な塩化ビニル系樹脂からなる基材フィルムに、例えば、
アクリル系粘着剤を塗布して絆創膏とするとき、基材フ
ィルムの粘着力が時間の経過と共に低減し、従って、こ
のように、粘着剤の粘着力が低減した後は、皮膚に貼付
しても、その端部が皮膚から浮いたり、場合によって
は、皮膚から剥がれるので、救急絆創膏としての機能を
果たさないことさえある。As a base film for such a skin-adhesive pressure-sensitive adhesive sheet, a film made of a so-called soft vinyl chloride resin is conventionally used because it is soft and conforms to the skin, and has excellent printability. Widely used. From the viewpoint of safety, such a soft vinyl chloride resin has conventionally used epoxidized soybean oil as a plasticizer, and generally uses a fatty acid calcium-fatty acid zinc-based stabilizer as a stabilizer. Has been. However, a base film made of such a vinyl chloride resin, for example,
When an acrylic adhesive is applied to form a plaster, the adhesive force of the base film decreases with the passage of time, and thus, after the adhesive force of the adhesive is reduced, it can be applied to the skin. , Its ends may float from the skin, or even peel off from the skin, and may not even function as a first aid bandage.
【０００４】[0004]
【発明が解決しようとする課題】本発明者らは、従来の
塩化ビニル系樹脂フィルムを基材フィルムとする皮膚貼
付用粘着シートにおけるこのような問題を解決するため
に鋭意研究した結果、従来の塩化ビニル系樹脂フィルム
においては、可塑剤として配合されているエポキシ化大
豆油が経時的に基材フィルムから粘着剤層に移行して、
例えば、アクリル系粘着剤を架橋、硬化させ、かくし
て、粘着剤が初期の粘着力を喪失して、粘着力が経時的
に低減することを見出した。DISCLOSURE OF INVENTION Problems to be Solved by the Invention The inventors of the present invention have earnestly studied to solve such problems in the conventional PSA sheet for skin application using a vinyl chloride resin film as a base film, and as a result, In the vinyl chloride resin film, the epoxidized soybean oil blended as a plasticizer migrates from the base film to the adhesive layer over time,
For example, it has been found that acrylic pressure sensitive adhesives are crosslinked and cured, thus causing the pressure sensitive adhesives to lose their initial tackiness and reduce tackiness over time.
【０００５】そこで、本発明者らは、可塑剤として、エ
ポキシ化大豆油に代えて、ポリエステル系可塑剤を用い
ると共に、安定剤として、高分子量エポキシ樹脂と金属
石ケンとハイドロタルサイトとの組合わせを用いること
によって、カレンダー加工によるフィルムの製造に際し
ては、熱安定性にすぐれ、カレンダー加工時の分解や変
色もなく、しかも、得られるフィルムに粘着剤を塗布し
て、粘着シートとするとき、この粘着シートは、長期間
の経過の後にも、可塑剤の粘着剤層への移行がなく、そ
の粘着剤がほぼ初期の粘着力を保持し、更には、基材フ
ィルムの経時的な変色（特に、黄変）も殆どなく、当初
の色相をほぼ保持することを見出して、本発明に至った
ものである。Therefore, the present inventors have used a polyester type plasticizer as a plasticizer instead of epoxidized soybean oil, and a combination of a high molecular weight epoxy resin, a metal soap and hydrotalcite as a stabilizer. By using a combination, in the production of a film by calendering, it has excellent thermal stability, there is no decomposition or discoloration during calendering, and moreover, when an adhesive is applied to the obtained film to form an adhesive sheet, This pressure-sensitive adhesive sheet has no migration of the plasticizer to the pressure-sensitive adhesive layer even after a long period of time, the pressure-sensitive adhesive retains its initial adhesive strength, and further, the discoloration of the base film over time ( In particular, the present invention has been achieved by finding that there is almost no yellowing) and that the original hue is almost retained.
【０００６】従って、本発明は、カレンダー加工による
製造に際しては、熱安定性にすぐれて、カレンダー加工
時の分解や変色がなく、しかも、得られたフィルムは、
長期間が経過した後も、変色がなく、ほぼ当初の色相を
保持しており、更に、このように得られたフィルムを基
材フィルムとして用いて、これに粘着剤を塗布して、粘
着シートとするとき、長期間が経過した後にも、その粘
着力が大幅には低下せず、ほぼ当初の粘着力を保持して
いる粘着シートを与える基材フィルム、好ましくは、救
急絆創膏を含む皮膚貼付用粘着シートのための基材フィ
ルムとその製造方法を提供することを目的とする。Therefore, the present invention is excellent in thermal stability during production by calendering, does not decompose or discolor during calendering, and the obtained film is
Even after a long period of time, there is no discoloration and almost the original hue is retained, and the film thus obtained is used as a base film, and an adhesive is applied to the film to form an adhesive sheet. When, the adhesive force does not significantly decrease even after a long period of time, and a base film that gives an adhesive sheet that retains almost the original adhesive force, preferably a skin patch containing a first-aid bandage An object of the present invention is to provide a base film for a pressure-sensitive adhesive sheet and a method for producing the same.
【０００７】[0007]
【課題を解決するための手段】本発明による粘着シート
用基材フィルムは、塩化ビニル系重合体１００重量部に
対して、数平均分子量が１５００〜３０００の範囲のポ
リエステル系可塑剤３０〜７０重量部と、重量平均分子
量２０００〜２００００のエポキシ樹脂３〜２０重量部
と、脂肪酸カルシウム、脂肪酸亜鉛及び脂肪酸バリウム
から選ばれる少なくとも１種の金属石ケンの適量と、ハ
イドロタルサイト0.１〜1.０重量部とからなることを特
徴とする。The base film for pressure-sensitive adhesive sheets according to the present invention comprises 30 to 70 parts by weight of a polyester plasticizer having a number average molecular weight of 1500 to 3000 with respect to 100 parts by weight of a vinyl chloride polymer. Parts, 3 to 20 parts by weight of an epoxy resin having a weight average molecular weight of 2000 to 20000, an appropriate amount of at least one metallic soap selected from fatty acid calcium, fatty acid zinc and fatty acid barium, and hydrotalcite 0.1 to 1. And 0 parts by weight.
【０００８】本発明による粘着シート用基材フィルムの
製造方法は、塩化ビニル系重合体１００重量部に対し
て、数平均分子量が１５００〜３０００の範囲のポリエ
ステル系可塑剤３０〜７０重量部と、重量平均分子量２
０００〜２００００のエポキシ樹脂３〜２０重量部と、
脂肪酸カルシウム、脂肪酸亜鉛及び脂肪酸バリウムから
選ばれる少なくとも１種の金属石ケンの適量と、ハイド
ロタルサイト0.１〜1.０重量部とからなる樹脂組成物を
カレンダー加工にてフィルムにすることを特徴とする。In the method for producing a base film for a pressure-sensitive adhesive sheet according to the present invention, 30 to 70 parts by weight of a polyester plasticizer having a number average molecular weight of 1500 to 3000 is added to 100 parts by weight of a vinyl chloride polymer. Weight average molecular weight 2
000 to 20,000 epoxy resin 3 to 20 parts by weight,
A resin composition comprising an appropriate amount of at least one metal soap selected from fatty acid calcium, fatty acid zinc, and fatty acid barium and 0.1 to 1.0 parts by weight of hydrotalcite is formed into a film by calendering. Characterize.
【０００９】[0009]
【発明の実施の形態】本発明において、塩化ビニル系重
合体としては、塩化ビニルの単独重合体、即ち、ポリ塩
化ビニルのほか、塩化ビニルと種々の共単量体との共重
合体が用いられる。そのような共単量体として、例え
ば、エチレン、プロピレン、酢酸ビニル、アクリル酸、
アクリル酸エステル、メタクリル酸、メタクリル酸エス
テル、マレイン酸、フマル酸、アクリロニトリル等を挙
げることができ、これら共単量体は単独で、又は２種以
上が組合わせて用いられる。従って、本発明において、
塩化ビニル系重合体としては、例えば、ポリ塩化ビニ
ル、塩化ビニル−エチレン共重合体、塩化ビニル−酢酸
ビニル共重合体等が好ましい具体例として挙げられ、特
に、本発明においては、ポリ塩化ビニルが好ましく用い
られる。これら塩化ビニル系重合体の平均重合度は、通
常、５００〜１５００の範囲が好ましく、特に、７００
〜１３００の範囲が好ましい。BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, as the vinyl chloride-based polymer, a homopolymer of vinyl chloride, that is, polyvinyl chloride, and a copolymer of vinyl chloride and various comonomers are used. To be Examples of such comonomers include ethylene, propylene, vinyl acetate, acrylic acid,
Acrylic acid ester, methacrylic acid, methacrylic acid ester, maleic acid, fumaric acid, acrylonitrile and the like can be mentioned, and these comonomers can be used alone or in combination of two or more kinds. Therefore, in the present invention,
Examples of the vinyl chloride-based polymer include polyvinyl chloride, vinyl chloride-ethylene copolymer, vinyl chloride-vinyl acetate copolymer and the like as preferred specific examples, and in the present invention, polyvinyl chloride is particularly preferable. It is preferably used. The average degree of polymerization of these vinyl chloride-based polymers is usually preferably in the range of 500 to 1500, and particularly 700
The range of 1300 is preferable.
【００１０】本発明によれば、このような塩化ビニル系
重合体に可塑剤や安定剤等を配合して、樹脂組成物と
し、これをカレンダー加工して、軟質塩化ビニル系樹脂
からなるフィルムとすることによって、粘着シート用基
材フィルムを得ることができる。According to the present invention, such a vinyl chloride polymer is blended with a plasticizer, a stabilizer and the like to form a resin composition, which is calendered to form a film made of a soft vinyl chloride resin. By doing so, a base film for an adhesive sheet can be obtained.
【００１１】本発明によれば、上記可塑剤として、従来
のエポキシ化大豆油に代えて、ポリエステル系可塑剤が
用いられる。ポリエステル系可塑剤とは、例えば、アジ
ピン酸、アゼライン酸、セバシン酸、フタル酸等のよう
なジカルボン酸と、エチレングリコール、プロピレング
リコール、ブチレングリコール、ネオペンチルグリコー
ル等のようなグリコールとの縮重合によるポリエステル
からなり、特に、本発明によれば、数平均分子量が１５
００〜３０００の範囲にあるものが塩化ビニル系重合体
１００重量部に対して３０〜７０重量部の範囲で用いら
れる。According to the present invention, a polyester plasticizer is used as the plasticizer instead of the conventional epoxidized soybean oil. The polyester plasticizer is, for example, obtained by polycondensation of a dicarboxylic acid such as adipic acid, azelaic acid, sebacic acid and phthalic acid with a glycol such as ethylene glycol, propylene glycol, butylene glycol and neopentyl glycol. It is made of polyester and, in particular, according to the invention, has a number average molecular weight of 15
Those in the range of 00 to 3000 are used in the range of 30 to 70 parts by weight with respect to 100 parts by weight of the vinyl chloride polymer.
【００１２】ポリエステル系可塑剤の数平均分子量が１
５００よりも小さいときは、これを配合した基材フィル
ムから粘着剤層に移行し、経時的に粘着剤の粘着力を低
減させる。しかし、ポリエステル系可塑剤の数平均分子
量が３０００よりも大きいときは、塩化ビニル系重合体
との相溶性が悪く、カレンダー加工による基材フィルム
の製造が困難であるのみならず、得られた基材フィルム
において、可塑剤が表面にプレートアウトして、粘着剤
の基材フィルムへの接着力を低減させる。The number average molecular weight of the polyester plasticizer is 1
When it is less than 500, the base film containing this is transferred to the pressure-sensitive adhesive layer to reduce the pressure-sensitive adhesive strength of the pressure-sensitive adhesive over time. However, when the number average molecular weight of the polyester plasticizer is more than 3000, the compatibility with the vinyl chloride polymer is poor, and it is difficult to produce a base film by calendering, and the obtained group In the material film, the plasticizer plate-outs on the surface to reduce the adhesive force of the adhesive to the base film.
【００１３】また、ポリエステル系可塑剤の配合量は、
特に、皮膚貼付用粘着シートのための基材フィルムとし
て、柔軟で皮膚になじみよい適切な弾性率を有するよう
に、塩化ビニル系重合体１００重量部に対して、通常、
３０〜７０重量部の範囲で用いられる。The blending amount of the polyester plasticizer is
In particular, as a base film for a pressure-sensitive adhesive sheet for skin application, in order to have an appropriate elastic modulus that is soft and conforms to the skin, usually,
It is used in the range of 30 to 70 parts by weight.
【００１４】皮膚貼付用粘着シートのための基材フィル
ムとしての塩化ビニル系樹脂フィルムにおいては、従来
より、安定剤として、金属石ケンが用いられているが、
しかし、金属石ケンのみでは、カレンダー加工によるフ
ィルムの製造に際して、樹脂組成物の熱安定性が不十分
であり、樹脂組成物の変色や分解を生じる。しかし、金
属石ケンを徒に多量に配合しても、ブルームやブリード
が生じて、基材フィルムに対する粘着剤の接着力が低減
することとなる。また、可塑剤として、ポリエステル系
可塑剤を配合した塩化ビニル系重合体も、熱安定性が不
十分であって、カレンダー加工中に黄変が起こりやす
い。In a vinyl chloride resin film as a base film for a pressure-sensitive adhesive sheet for sticking to the skin, metal soap is conventionally used as a stabilizer.
However, with only metal soap, the thermal stability of the resin composition is insufficient when a film is produced by calendering, which causes discoloration or decomposition of the resin composition. However, even if a large amount of metal soap is blended, blooming and bleeding occur, and the adhesive force of the pressure-sensitive adhesive to the base film is reduced. A vinyl chloride polymer containing a polyester plasticizer as a plasticizer also has insufficient thermal stability and is liable to cause yellowing during calendering.
【００１５】そこで、安定剤として、金属石ケンと共に
エポキシ化大豆油を併用することが試みられているが、
安定剤として、エポキシ化大豆油を併用しても、依然と
して、これらを含む樹脂組成物のカレンダー加工中の黄
変を十分に防止することができないのみならず、前述し
たように、得られる粘着シートにおいて、エポキシ化大
豆油は、経時的に基材フィルムから粘着剤層に移行し
て、粘着剤の粘着力を低減させる。Thus, it has been attempted to use epoxidized soybean oil together with metal soap as a stabilizer.
Even if epoxidized soybean oil is used in combination as a stabilizer, it is still not possible to sufficiently prevent yellowing during calendar processing of a resin composition containing them, and as described above, the pressure-sensitive adhesive sheet obtained is obtained. In the above, the epoxidized soybean oil migrates from the base film to the pressure-sensitive adhesive layer with time to reduce the pressure-sensitive adhesive strength of the pressure-sensitive adhesive.
【００１６】ここに、本発明によれば、安定剤として、
高分子量エポキシ樹脂と金属石ケンとハイドロタルサイ
トとの組合わせを用いることによって、カレンダー加工
によるフィルムの製造に際しては、熱安定性にすぐれ、
カレンダー加工時の分解や変色もないフィルムを得るこ
とができる。しかも、このようにして得られるフィルム
は、これに粘着剤を塗布して、粘着シートとするとき、
この粘着シートは、長期間の経過の後にも、可塑剤の粘
着剤層への移行がなく、その粘着剤がほぼ初期の粘着力
を保持刷ることができる。更には、本発明による基材フ
ィルムは、経時的な変色（特に、黄変）も殆どなく、長
期間の経過の後にも、当初の色相をほぼ保持している。Here, according to the present invention, as a stabilizer,
By using a combination of high molecular weight epoxy resin, metal soap and hydrotalcite, when producing a film by calendering, it has excellent thermal stability,
It is possible to obtain a film that does not decompose or discolor during calendar processing. Moreover, when the film thus obtained is coated with a pressure-sensitive adhesive to form a pressure-sensitive adhesive sheet,
In this pressure-sensitive adhesive sheet, the plasticizer does not migrate to the pressure-sensitive adhesive layer even after a long period of time, and the pressure-sensitive adhesive can hold and print the almost initial pressure-sensitive adhesive force. Furthermore, the base film according to the present invention has almost no discoloration with time (particularly yellowing), and almost retains the initial hue even after a long time has passed.
【００１７】本発明において用いる上記高分子量エポキ
シ樹脂は、重量平均分子量が２０００〜２００００の範
囲にあるものであって、例えば、グリシジルメタクリレ
ートと他のビニル単量体との共重合体、例えば、スチレ
ン、α−メチルスチレン、アクリル酸エステル、メタク
リル酸エステル、塩化ビニル、アクリロニトリル、メタ
クリロニトリル等の１種又は２種以上との共重合体を挙
げることができる。また、本発明において用いる高分子
量エポキシ樹脂は、エポキシ当量が１００〜５５０の範
囲にあるのが好ましく、特に、２００〜４５０の範囲に
あるのが好ましい。The high molecular weight epoxy resin used in the present invention has a weight average molecular weight in the range of 2000 to 20000, and is, for example, a copolymer of glycidyl methacrylate and another vinyl monomer, such as styrene. , Α-methylstyrene, acrylic acid ester, methacrylic acid ester, vinyl chloride, acrylonitrile, methacrylonitrile and the like, and a copolymer with one or more kinds thereof. Further, the high molecular weight epoxy resin used in the present invention preferably has an epoxy equivalent in the range of 100 to 550, and particularly preferably in the range of 200 to 450.
【００１８】本発明によれば、重量平均分子量が２００
０よりも小さいエポキシ樹脂は、これを配合した塩化ビ
ニル系重合体に配合すれば、得られる基材フィルムに粘
着剤層を積層して、粘着シートとするとき、エポキシ樹
脂が経時的にその粘着剤層に移行し、粘着力を低下させ
る。他方、重量平均分子量が２００００よりも大きいと
きは、塩化ビニル系重合体との相溶性が悪いので、その
ようなエポキシ樹脂を配合した塩化ビニル系重合体組成
物をカレンダー加工する際に、プレートアウトする。特
に、本発明によれば、エポキシ樹脂は、重量平均分子量
が５０００〜１５０００の範囲にあるものが好ましく、
なかでも、重量平均分子量が７０００〜１３０００の範
囲にあるものが一層好ましい。According to the present invention, the weight average molecular weight is 200.
When the epoxy resin smaller than 0 is blended with the vinyl chloride-based polymer containing the epoxy resin, when the pressure-sensitive adhesive layer is laminated on the obtained base film to form a pressure-sensitive adhesive sheet, the epoxy resin does not adhere to the adhesive with time. It moves to the agent layer and reduces the adhesive strength. On the other hand, when the weight average molecular weight is larger than 20,000, compatibility with the vinyl chloride polymer is poor, and therefore, when the vinyl chloride polymer composition containing such an epoxy resin is calendered, plate-out is performed. To do. In particular, according to the present invention, the epoxy resin preferably has a weight average molecular weight of 5,000 to 15,000,
Among them, those having a weight average molecular weight in the range of 7,000 to 13,000 are more preferable.
【００１９】本発明によれば、エポキシ樹脂は、塩化ビ
ニル系重合体１００重量部に対して、３〜２０重量部の
範囲で配合される。塩化ビニル系重合体１００重量部に
対して、エポキシ樹脂の配合量が３重量部よりも少ない
ときは、得られる基材フィルムを長期間にわたって保存
したときの変色、特に、黄変を防止することができな
い。他方、エポキシ樹脂の配合量を余りに多くしても、
得られる粘着シートの粘着力を経時的に低下させ、ま
た、樹脂組成物がカレンダー加工に際してロール間で滑
りを生じて、加工し難い問題がある。更に、高分子量エ
ポキシ樹脂は高価でもある。そこで、本発明によれば、
塩化ビニル系重合体１００重量部に対して、エポキシ樹
脂の配合量を２０重量部を越える量とすることは好まし
くない。According to the present invention, the epoxy resin is blended in the range of 3 to 20 parts by weight with respect to 100 parts by weight of the vinyl chloride polymer. When the amount of the epoxy resin compounded is less than 3 parts by weight with respect to 100 parts by weight of the vinyl chloride polymer, it is necessary to prevent discoloration, especially yellowing, when the obtained base film is stored for a long period of time. I can't. On the other hand, if the amount of epoxy resin compounded is too large,
There is a problem that the adhesive strength of the obtained pressure-sensitive adhesive sheet is lowered with time, and the resin composition is slippery between rolls during calendar processing, which makes it difficult to process. In addition, high molecular weight epoxy resins are expensive. Therefore, according to the present invention,
It is not preferable to use more than 20 parts by weight of the epoxy resin based on 100 parts by weight of the vinyl chloride polymer.
【００２０】本発明においては、金属石ケンとしては、
脂肪酸カルシウム、脂肪酸亜鉛及び脂肪酸バリウムから
選ばれる少なくとも１種が用いられ、これらのなかで
は、特に、組合わせによる相乗効果による安定化効果の
高い脂肪酸カルシウム−脂肪酸亜鉛の組合わせからなる
安定剤（以下、Ｃａ−Ｚｎ系安定剤という。）が好まし
く用いられる。In the present invention, as the metal soap,
Fatty acid calcium, at least one is used selected et or fatty acid zinc salts and fatty acid barium, In these circumstances, in particular, a high fatty acid calcium stable effect by synergistic effect of the combination - consisting of a combination of fatty acid zinc stabilizer ( Hereinafter, a Ca-Zn stabilizer) is preferably used.
【００２１】上記金属石ケンの脂肪酸成分としては、例
えば、ラウリン酸、ステアリン酸、リシノール酸等が好
ましく、従って、上記金属石ケンの具体例として、例え
ば、ラウリン酸カルシウム、ステアリン酸カルシウム、
ラウリン酸カルシウム、ステアリン酸カルシウム、リシ
ノール酸カルシウム、ラウリン酸亜鉛、リシノール酸亜
鉛、ステアリン酸亜鉛、ラウリン酸バリウム、ステアリ
ン酸バリウム、リシノール酸バリウム等が好ましく用い
られる。The fatty acid component of the above-mentioned metallic soap is preferably, for example, lauric acid, stearic acid, ricinoleic acid, etc. Therefore, specific examples of the above-mentioned metallic soap include, for example, calcium laurate, calcium stearate,
Calcium laurate, calcium stearate, calcium ricinoleate, zinc laurate, zinc ricinoleate, zinc stearate, barium laurate, barium stearate, barium ricinoleate and the like are preferably used.
【００２２】本発明によれば、安定剤としてのこれら金
属石ケンは、特に、限定されるものではないが、好まし
くは、塩化ビニル系重合体１００重量部に対して、0.５
〜2.５重量部の範囲で用いられる。金属石ケンの配合量
が塩化ビニル系重合体１００重量部に対して0.５重量部
よりも少ないときは、安定剤として、前記高分子量エポ
キシ樹脂とハイドロタルサイトとの組合わせとして用い
ても、樹脂組成物がカレンダー加工時、熱安定性が不足
する場合がある。しかし、金属石ケンの配合量が塩化ビ
ニル系重合体１００重量部に対して2.５重量部よりも多
いときは、ブルームやブリードを生じて、基材フィルム
に対する粘着剤の接着力を低減させる場合がある。According to the present invention, these metal soaps as the stabilizer are not particularly limited, but preferably 0.5 to 100 parts by weight of the vinyl chloride polymer.
It is used in the range of up to 2.5 parts by weight. When the amount of the metal soap is less than 0.5 parts by weight based on 100 parts by weight of the vinyl chloride polymer, it may be used as a stabilizer in combination with the above-mentioned high molecular weight epoxy resin and hydrotalcite. The heat stability of the resin composition may be insufficient during calendering. However, when the amount of the metal soap is more than 2.5 parts by weight based on 100 parts by weight of the vinyl chloride-based polymer, bloom or bleeding occurs to reduce the adhesive force of the pressure-sensitive adhesive to the base film. There are cases.
【００２３】ハイドロタルサイトは、カレンダー加工に
おいて、樹脂組成物に求められる熱安定性を与えるほ
か、使用や保管中のフィルムに酸化や分解に対する抵抗
性をも与えて、フィルムの寿命を長くすることができ
る。しかし、ハイドロタルサイトのみを安定剤として用
いるときは、その配合量の如何にかかわらず、樹脂組成
物のカレンダー加工時の樹脂組成物の熱安定性が著しく
悪く、樹脂が変色や分解を起こすので、樹脂組成物をフ
ィルムに成形することができない。Hydrotalcite not only imparts the thermal stability required for the resin composition in calendering, but also imparts resistance to oxidation and decomposition to the film during use and storage, thereby extending the life of the film. You can However, when only hydrotalcite is used as a stabilizer, the thermal stability of the resin composition during calendering of the resin composition is remarkably poor and the resin causes discoloration or decomposition regardless of the compounding amount. However, the resin composition cannot be formed into a film.
【００２４】ハイドロタルサイトは、一般に、次の組成
式
Ｍｇ1-x Ａｌx (ＯＨ)2（ＣＯ3) x/2 ・ m Ｈ2Ｏ
で表わされる不定比の塩基性炭酸マグネシウムアルミニ
ウムであって、通常、ｘは、０＜ｘ≦0.３３、ｍは、０
≦ｍ≦0.５の範囲であり、市販品を入手することができ
る（「石灰と石膏、」第１８７巻第４７〜５３頁（１９
８３年））。Hydrotalcite is generally a non - stoichiometric basic magnesium aluminum carbonate represented by the following composition formula: Mg 1-x Al x (OH) 2 (CO 3 ) x / 2 · m H 2 O , Usually x is 0 <x ≦ 0.33, m is 0
It is in the range of ≦ m ≦ 0.5, and commercially available products can be obtained (“Lime and gypsum,” Vol. 187, pp. 47-53 (19).
1983)).
【００２５】本発明においては、ハイドロタルサイト
は、塩化ビニル系重合体１００重量部に対して、0.１〜
1.０重量部の範囲で用いられる。ハイドロタルサイトの
配合量が塩化ビニル系重合体１００重量部に対して0.１
重量部よりも少ないときは、樹脂組成物のカレンダー加
工時、熱安定性が不足して、樹脂組成物の変色が生じ
る。しかし、ハイドロタルサイトの配合量が塩化ビニル
系重合体１００重量部に対して1.０重量部よりも多いと
きは、ハイドロタルサイトに起因する好ましくない着色
を生じる。特に、本発明によれば、ハイドロタルサイト
の配合量は、塩化ビニル系重合体１００重量部に対し
て、0.２〜0.５重量部の範囲が好ましい。In the present invention, hydrotalcite is used in an amount of 0.1 to 100 parts by weight based on the vinyl chloride polymer.
Used in the range of 1.0 parts by weight. Hydrotalcite content of 0.1 per 100 parts by weight of vinyl chloride polymer
When the amount is less than the amount by weight, thermal stability is insufficient during calendering of the resin composition, resulting in discoloration of the resin composition. However, when the blending amount of hydrotalcite is more than 1.0 part by weight based on 100 parts by weight of the vinyl chloride polymer, undesired coloring due to hydrotalcite occurs. In particular, according to the present invention, the blending amount of hydrotalcite is preferably in the range of 0.2 to 0.5 parts by weight with respect to 100 parts by weight of the vinyl chloride polymer.
【００２６】このように、本発明による粘着シート用基
材フィルムは、可塑剤としてポリエステル系可塑剤を配
合し、安定剤として、高分子量エポキシ樹脂と金属石ケ
ンとハイドロタルサイトとを組合わせて配合してなる塩
化ビニル系樹脂組成物からなるものである。このような
樹脂組成物は、これをカレンダー加工にてフィルムに成
形する際、熱安定性にすぐれており、望ましくない分解
や着色等が起こらない。しかも、このようにして得られ
る基材フィルムは、その上に粘着剤層を設けて粘着シー
トとするとき、可塑剤が粘着剤層に移行しないので、長
期間の経過の後にも、その粘着力が大幅には低下せず、
ほぼ当初の値を保持している。更に、本発明による基材
フィルムは、長期間の経過後にも、望ましくない変色が
殆どない。As described above, the base film for pressure-sensitive adhesive sheets according to the present invention contains a polyester plasticizer as a plasticizer, and as a stabilizer, a combination of a high molecular weight epoxy resin, a metal soap and hydrotalcite. It is composed of a blended vinyl chloride resin composition. Such a resin composition has excellent thermal stability when it is formed into a film by calendering, and does not cause undesirable decomposition or coloring. In addition, the base film thus obtained has a pressure-sensitive adhesive strength even after a long period of time because the plasticizer does not migrate to the pressure-sensitive adhesive layer when the pressure-sensitive adhesive layer is provided on the base film to form a pressure-sensitive adhesive sheet. Does not drop significantly,
It keeps almost the original value. Furthermore, the substrate film according to the invention has little undesired discoloration even after a long period of time.
【００２７】本発明による粘着シート用基材フィルム
は、必要に応じて、上記安定剤と共に、従来より知られ
ている安定剤を含んでいてもよい。更に、本発明による
粘着シート用基材フィルムは、必要に応じて、塩化ビニ
ル系樹脂に配合することが従来よりよく知られている種
々の添加剤、例えば、着色剤、光安定剤、酸化防止剤、
紫外線吸収剤、改質剤、充填剤、難燃剤、帯電防止剤、
防黴剤、滑剤等を含んでいてもよい。The base film for a pressure-sensitive adhesive sheet according to the present invention may contain a conventionally known stabilizer together with the above stabilizer, if necessary. Further, the base film for a pressure-sensitive adhesive sheet according to the present invention, if necessary, various additives conventionally known to be blended with a vinyl chloride resin, for example, a colorant, a light stabilizer, an antioxidant. Agent,
UV absorbers, modifiers, fillers, flame retardants, antistatic agents,
It may contain an antifungal agent, a lubricant and the like.
【００２８】本発明による粘着シート用基材フィルム
は、一般の粘着シートのほか、その安全性の高さから、
例えば、救急絆創膏を含む皮膚貼付用粘着シートのため
の基材フィルムとして好適に用いられるが、この用途に
用いるときは、皮膚に貼付したとき、なじみよく、皮膚
によく追随し、違和感がないように、その厚みは、４０
〜１００μｍの範囲であるのが好ましい。The base film for pressure-sensitive adhesive sheets according to the present invention, in addition to general pressure-sensitive adhesive sheets, is highly safe.
For example, it is preferably used as a base film for a pressure-sensitive adhesive sheet for skin application including a first-aid bandage, but when used in this application, when applied to the skin, it fits well, follows the skin well, and does not feel uncomfortable. And its thickness is 40
It is preferably in the range of ˜100 μm.
【００２９】本発明によるこのような粘着シート用基材
フィルムは、本発明に従って、好ましくは、前述したよ
うに、塩化ビニル系重合体にポリエステル系可塑剤、高
分子量エポキシ樹脂、金属石、ハイドロタルサイト、必
要に応じて、上述したような添加剤を配合してなる樹脂
組成物をカレンダー加工にてフィルムに成形することに
よって得ることができる。According to the present invention, such a substrate film for pressure-sensitive adhesive sheets according to the present invention is preferably a vinyl chloride polymer, a polyester plasticizer, a high molecular weight epoxy resin, a metal stone, or hydrotal, as described above. It can be obtained by forming a film at the site and, if necessary, the resin composition containing the above-mentioned additives by calendering.
【００３０】本発明によれば、このようにして、粘着シ
ート用基材フィルムを得ることができ、このような基材
フィルム上に粘着剤層を設けることによって、救急絆創
膏を含む皮膚貼付用粘着シートを得ることができる。According to the present invention, a base film for pressure-sensitive adhesive sheets can be obtained in this manner, and by providing a pressure-sensitive adhesive layer on such a base film, a pressure-sensitive adhesive for sticking to skin, including a first-aid bandage. You can get a sheet.
【００３１】上記粘着剤としては、従来より知られてい
るアクリル系粘着剤や天然ゴム系粘着剤のほか、合成ゴ
ム系、シリコーン系、ビニルエーテル系の粘着剤等、皮
膚刺激性が少なく、医療用粘着剤として用いることがで
きるものであれば、特に、限定されることなく、任意の
ものが用いられる。しかしながら、本発明においては、
種々の粘着剤のなかでも、皮膚に対するアレルギー性が
少ない等の皮膚病理学的見地から、アクリル系粘着剤が
好ましく用いられる。粘着剤層の厚みは、皮膚に対する
接着性の点から、通常、２０〜８０μｍの範囲であり、
好ましくは、３０〜６０μｍの範囲である。As the above-mentioned pressure-sensitive adhesive, in addition to conventionally known acrylic pressure-sensitive adhesives and natural rubber-based pressure-sensitive adhesives, synthetic rubber-based, silicone-based, vinyl ether-based pressure-sensitive adhesives and the like have little skin irritation and are used for medical purposes. There is no particular limitation as long as it can be used as an adhesive, and any one can be used. However, in the present invention,
Among various pressure-sensitive adhesives, an acrylic pressure-sensitive adhesive is preferably used from the viewpoint of skin pathology such as low allergenicity to the skin. The thickness of the pressure-sensitive adhesive layer is usually in the range of 20 to 80 μm from the viewpoint of adhesiveness to the skin,
It is preferably in the range of 30 to 60 μm.
【００３２】必要に応じて、粘着剤に架橋剤を配合して
もよい。架橋剤としては、例えば、トリレンジイソシア
ネート−トリメチロールプロパン付加物のような変性ポ
リイソシアネートや、アルミニウムトリス（エチルアセ
トアセテート）のようなキレーターと呼ばれる有機金属
化合物を例示することができる。このような架橋剤を少
量、粘着剤に配合し、基材フィルムに塗工、乾燥させた
後、必要に応じて、加熱することによって、アクリル系
粘着剤を架橋させて、その粘着力を調節することができ
る。If necessary, a cross-linking agent may be added to the adhesive. Examples of the cross-linking agent include modified polyisocyanates such as tolylene diisocyanate-trimethylol propane adducts, and organometallic compounds called chelators such as aluminum tris (ethylacetoacetate). A small amount of such a cross-linking agent is mixed with the pressure-sensitive adhesive, coated on the base film, dried, and then heated, if necessary, to cross-link the acrylic pressure-sensitive adhesive and adjust its adhesive strength. can do.
【００３３】更に、基材フィルム上に粘着剤を塗布する
に先立って、その表面をコロナ放電処理したり、既に知
られている種々のプライマーを塗布したりして、基材フ
ィルムと粘着剤との間の濡れ性や投錨効果を高めてもよ
い。Further, prior to applying the pressure-sensitive adhesive on the base film, the surface of the base film is subjected to corona discharge treatment, or various known primers are applied to the base film and the pressure-sensitive adhesive. You may improve the wettability and the anchoring effect between.
【００３４】基材フィルム上に粘着剤を塗布するには、
基材フィルム上に粘着剤の溶液を直接、塗布し、乾燥さ
せ、また、基材フィルム上にホットメルト粘着剤を溶融
させ、直接、押出機にて塗布してもよい。しかし、基材
フィルムの不必要な伸びや曲がり（カール）を防止する
ためには、適宜の方法にて剥離紙の片面に予め粘着剤層
を形成し、この粘着剤層の上に基材フィルムを貼り合わ
せて、上記粘着剤層を基材フィルムに転写する所謂転写
法によるのが好ましい。To apply the adhesive on the substrate film,
You may apply | coat the solution of an adhesive agent directly on a base material film, it may make it dry, and you may melt | dissolve a hot-melt adhesive agent on a base material film, and apply it directly with an extruder. However, in order to prevent unnecessary elongation and curling of the base film, a pressure-sensitive adhesive layer is formed in advance on one surface of the release paper by an appropriate method, and the base film is formed on the pressure-sensitive adhesive layer. It is preferable to use a so-called transfer method in which the above-mentioned pressure-sensitive adhesive layer is transferred to a substrate film by bonding.
【００３５】本発明による粘着シート用基材フィルム
は、その表面に粘着剤層を設けることによって、ドレッ
シングや巻絆等として用いることができるほか、粘着剤
層の表面の中央域にガーゼ等の布帛やスポンジパッド等
の創傷部を保護するための吸液性パッドを設けることに
よって、救急絆創膏とすることができる。The base film for pressure-sensitive adhesive sheets according to the present invention can be used as a dressing or a tie by providing a pressure-sensitive adhesive layer on the surface thereof, and a cloth such as gauze can be used in the central area of the surface of the pressure-sensitive adhesive layer. By providing a liquid-absorbent pad such as a sponge pad or the like to protect the wound, a first-aid bandage can be obtained.
【００３６】[0036]
【実施例】以下に実施例を挙げて本発明を説明するが、
本発明はこれら実施例により何ら限定されるものではな
い。The present invention will be described below with reference to examples.
The present invention is not limited to these examples.
【００３７】実施例１
表１に示すように、ポリ塩化ビニル（平均重合度１３０
０）にＣａ−Ｚｎ系安定剤、ハイドロタルサイト（協和
化学工業（株）製アルカマイザーＩ、前記式において、
ｘ＝0.３３、ｍ＝0.５０）、種々の数平均分子量を有す
るポリエステル系可塑剤（大日本インキ化学工業（株）
製ポリサイザーＷ）、エポキシ樹脂（日本油脂（株）製
グリシジルメタクリレート共重合体「ファルパック５０
ＭＰ」、グリシジルメタクリレート／メタクリル酸メチ
ル（１／１）共重合体、エポキシ当量２５９〜３５０、
重量平均分子量８０００〜１２０００）を配合し、ヘン
シェルミキサーにて十分混合し、密閉式混練機で混練
し、ストレーナーを通過させた後、逆Ｌ型４本カレンダ
ー装置（ロール表面温度１８０℃）を用いて、塩化ビニ
ル樹脂からなる厚み７０μｍの粘着シート用基材フィル
ムを得た。Example 1 As shown in Table 1, polyvinyl chloride (average degree of polymerization: 130
0) Ca-Zn stabilizer, hydrotalcite (Alkamizer I manufactured by Kyowa Chemical Industry Co., Ltd., in the above formula,
x = 0.33, m = 0.50), polyester plasticizers having various number average molecular weights (Dainippon Ink and Chemicals, Inc.)
Polysizer W), epoxy resin (Glycidyl methacrylate copolymer manufactured by NOF CORPORATION) "Falpack 50"
MP ", glycidyl methacrylate / methyl methacrylate (1/1) copolymer, epoxy equivalent 259 to 350,
(Weight average molecular weight 8000 to 12000), thoroughly mixed with a Henschel mixer, kneaded with a closed kneader and passed through a strainer, and then using an inverted L-type four-calender device (roll surface temperature 180 ° C.) Thus, a substrate film for a pressure-sensitive adhesive sheet having a thickness of 70 μm made of vinyl chloride resin was obtained.
【００３８】別に、市販のアクリル系粘着剤（リキダイ
ン（株）製ＡＲ−２０４５）１００重量部に架橋剤とし
て変性ポリイソシアネート（日本ポリウレタン工業
（株）製コロネートＬ）0.００２重量部（固形分）を配
合して粘着剤を調製した。この粘着剤を上記基材フィル
ムに乾燥厚み３５μｍに塗布した。Separately, 100 parts by weight of a commercially available acrylic pressure-sensitive adhesive (AR-2045 manufactured by Rikidyne Co., Ltd.) was used as a cross-linking agent, and 0.0002 parts by weight of solid polyisocyanate (Coronate L manufactured by Nippon Polyurethane Industry Co., Ltd.) (solid content) ) Was blended to prepare an adhesive. This adhesive was applied to the above-mentioned substrate film so as to have a dry thickness of 35 µm.
【００３９】このようにして、基材フィルムの表面上に
粘着剤層を設けた粘着シートからなる試料について、常
態（２３℃）で放置し、又は７０℃で１５日間放置して
促進劣化させた後、試料を１９ｍｍ幅でステンレス板に
貼付し、測定前、２３℃で２４時間放置した後、定速伸
長引張試験機を用いて、ＪＩＳ Ｚ ０２３７に準じ
て、剥離角度１８０度、引張速度３００ｍｍ／分で測定
した。試料の経時粘着力は、促進劣化後の剥離力の常態
剥離力に対する維持率によって評価した。In this way, the sample consisting of the pressure-sensitive adhesive sheet having the pressure-sensitive adhesive layer provided on the surface of the substrate film was left in the normal state (23 ° C.) or left at 70 ° C. for 15 days for accelerated deterioration. After that, the sample was attached to a stainless steel plate with a width of 19 mm, left at 23 ° C. for 24 hours before measurement, and then using a constant-speed elongation tensile tester, according to JIS Z 0237, a peeling angle of 180 degrees and a pulling speed of 300 mm. It was measured in minutes. The time-dependent adhesive strength of the sample was evaluated by the maintenance ratio of the peeling force after accelerated deterioration to the normal peeling force.
【００４０】また、基材フィルムを７０℃で１５日間放
置して、促進劣化させ、当初と促進劣化後の色相の変化
を色差計にて測定し、ΔＥ＞１のときを変色あり、ΔＥ
≦１のときを変色なしとした。結果を表１に示す。The substrate film was left standing at 70 ° C. for 15 days for accelerated deterioration, and the change in hue at the beginning and after accelerated deterioration was measured with a color difference meter. When ΔE> 1, discoloration occurred, and ΔE
When ≦ 1, there was no discoloration. The results are shown in Table 1.
【００４１】実施例２〜４
表１に示す樹脂組成物を調製した以外は、実施例１と同
様にして、基材フィルムを得、これに粘着剤を塗布した
粘着シートの試料について、実施例１と同様にして、常
態剥離力と促進劣化後の剥離力の維持率を求めた。ま
た、基材フィルムを促進劣化させたときの変色の有無を
実施例１と同様にして調べた。結果を表１に示す。Examples 2 to 4 A substrate film was obtained in the same manner as in Example 1 except that the resin compositions shown in Table 1 were prepared, and a pressure-sensitive adhesive sheet sample prepared by applying a pressure-sensitive adhesive to the substrate film was used. In the same manner as in 1, the maintenance ratio of the normal peeling force and the peeling force after accelerated deterioration was determined. Further, the presence or absence of discoloration when the base film was accelerated and deteriorated was examined in the same manner as in Example 1. The results are shown in Table 1.
【００４２】比較例１
表２に示すように、数平均分子量１０００のポリエステ
ル系可塑剤を用いて、樹脂組成物を調製した以外は、実
施例１と同様にして、基材フィルムを得、これに粘着剤
を塗布した粘着シートの試料について、実施例１と同様
にして、常態剥離力と促進劣化後の剥離力の維持率を求
めた。また、基材フィルムを促進劣化させたときの変色
の有無を実施例１と同様にして調べた。結果を表２に示
す。Comparative Example 1 As shown in Table 2, a substrate film was obtained in the same manner as in Example 1 except that a resin composition was prepared using a polyester plasticizer having a number average molecular weight of 1000. With respect to the sample of the pressure-sensitive adhesive sheet coated with the pressure-sensitive adhesive, the maintenance ratio of the normal peel force and the peel force after accelerated deterioration was obtained in the same manner as in Example 1. Further, the presence or absence of discoloration when the base film was accelerated and deteriorated was examined in the same manner as in Example 1. The results are shown in Table 2.
【００４３】比較例２
表２に示すように、可塑剤として、ポリエステル系可塑
剤に代えて、フタル酸ジオクチルを用いて、樹脂組成物
を調製した以外は、実施例１と同様にして、基材フィル
ムを得、これに粘着剤を塗布した粘着シートの試料につ
いて、実施例１と同様にして、常態剥離力と促進劣化後
の剥離力の維持率を求めた。また、基材フィルムを促進
劣化させたときの変色の有無を実施例１と同様にして調
べた。結果を表２に示す。Comparative Example 2 As shown in Table 2, the procedure of Example 1 was repeated except that a resin composition was prepared by using dioctyl phthalate as the plasticizer instead of the polyester plasticizer. For a sample of a pressure-sensitive adhesive sheet in which a material film was obtained and a pressure-sensitive adhesive was applied to the material film, the retention ratio of the normal peel force and the peel force after accelerated deterioration was determined in the same manner as in Example 1. Further, the presence or absence of discoloration when the base film was accelerated and deteriorated was examined in the same manner as in Example 1. The results are shown in Table 2.
【００４４】比較例３
表２に示すように、安定剤として、Ｃａ−Ｚｎ系安定剤
とエポキシ樹脂のみを配合し、ハイドロタルサイトを用
いなかった以外は、実施例１と同様にして、樹脂組成物
を調製し、基材フィルムを得、これに粘着剤を塗布した
粘着シートの試料について、実施例１と同様にして、常
態剥離力と促進劣化後の剥離力の維持率を求めた。ま
た、基材フィルムを促進劣化させたときの変色の有無を
実施例１と同様にして調べた。結果を表２に示す。Comparative Example 3 As shown in Table 2, a resin was prepared in the same manner as in Example 1 except that only Ca-Zn stabilizer and an epoxy resin were blended as stabilizers and no hydrotalcite was used. A composition was prepared, a base film was obtained, and a sample of a pressure-sensitive adhesive sheet obtained by applying a pressure-sensitive adhesive to the composition was evaluated in the same manner as in Example 1 to determine the retention ratio of the normal peel force and the peel force after accelerated deterioration. Further, the presence or absence of discoloration when the base film was accelerated and deteriorated was examined in the same manner as in Example 1. The results are shown in Table 2.
【００４５】比較例４
表２に示すように、可塑剤として数平均分子量２３００
のポリエステル系可塑剤を用いると共に、安定化剤とし
て、Ｃａ−Ｚｎ系安定剤とエポキシ化大豆油（大日本イ
ンキ化学工業（株）製Ｗ−１００ＥＬ）の組合わせを用
いた以外は、実施例１と同様にして、樹脂組成物を調製
し、基材フィルムを得、これに粘着剤を塗布した粘着シ
ートの試料について、実施例１と同様にして、常態剥離
力と促進劣化後の剥離力の維持率を求めた。また、基材
フィルムを促進劣化させたときの変色の有無を実施例１
と同様にして調べた。結果を表２に示す。Comparative Example 4 As shown in Table 2, as a plasticizer, the number average molecular weight was 2300.
Example except that the polyester-based plasticizer of No. 1 was used and a combination of the Ca-Zn-based stabilizer and epoxidized soybean oil (W-100EL manufactured by Dainippon Ink and Chemicals, Inc.) was used as the stabilizer. In the same manner as in 1, a resin composition was prepared, a substrate film was obtained, and a pressure-sensitive adhesive sheet sample coated with the pressure-sensitive adhesive was applied in the same manner as in Example 1 under the conditions of normal peeling force and peeling force after accelerated deterioration. The maintenance rate of was calculated. In addition, the presence or absence of discoloration when the base film is accelerated and deteriorated is determined in Example 1.
I examined it in the same way. The results are shown in Table 2.
【００４６】比較例５
表２に示すように、エポキシ樹脂を２５重量部配合し
て、樹脂組成物を調製した以外は、実施例４と同様にし
て、基材フィルムを得、これに粘着剤を塗布した粘着シ
ートの試料について、実施例１と同様にして、常態剥離
力と促進劣化後の剥離力の維持率を求めた。また、基材
フィルムを促進劣化させたときの変色の有無を実施例１
と同様にして調べた。結果を表２に示す。Comparative Example 5 As shown in Table 2, a base film was obtained in the same manner as in Example 4 except that a resin composition was prepared by mixing 25 parts by weight of an epoxy resin, and a pressure-sensitive adhesive was added thereto. For a sample of the pressure-sensitive adhesive sheet coated with, the maintenance ratio of the normal peel force and the peel force after accelerated deterioration was determined in the same manner as in Example 1. In addition, the presence or absence of discoloration when the base film is accelerated and deteriorated is determined in Example 1.
I examined it in the same way. The results are shown in Table 2.
【００４７】比較例６
表２に示すように、エポキシ樹脂を配合せずに、樹脂組
成物を調製した以外は、実施例２と同様にして、基材フ
ィルムを得、これに粘着剤を塗布した粘着シートの試料
について、実施例１と同様にして、常態剥離力と促進劣
化後の剥離力の維持率を求めた。また、基材フィルムを
促進劣化させたときの変色の有無を実施例１と同様にし
て調べた。結果を表２に示す。Comparative Example 6 As shown in Table 2, a base film was obtained in the same manner as in Example 2 except that the resin composition was prepared without blending the epoxy resin, and the adhesive film was applied thereto. With respect to the sample of the pressure-sensitive adhesive sheet, the maintenance ratio of the normal peel force and the peel force after accelerated deterioration was determined in the same manner as in Example 1. Further, the presence or absence of discoloration when the base film was accelerated and deteriorated was examined in the same manner as in Example 1. The results are shown in Table 2.
【００４８】[0048]
【表１】 [Table 1]
【００４９】[0049]
【表２】 [Table 2]
【００５０】[0050]
【発明の効果】以上のように、本発明による粘着シート
用基材フィルムは、可塑剤としてポリエステル系可塑剤
を配合し、安定剤として、高分子量ポリ樹脂と金属石ケ
ンとハイドロタルサイトとを組合わせて配合してなる塩
化ビニル系樹脂組成物からなるものであるので、このよ
うな樹脂組成物をカレンダー加工にてフィルムに成形す
る際、熱安定性にすぐれており、望ましくない分解や着
色等が起こらず、しかも、得られる基材フィルムは、こ
れに粘着剤層を設けて粘着シートとするとき、上記ポリ
エステル系可塑剤が粘着剤層に移行しないので、長期間
の経過の後にも、その粘着力が大幅には低下せず、ほぼ
当初の値を保持している。更に、本発明による基材フィ
ルムは、長期間の経過後にも、望ましくない変色が殆ど
起こらない。As described above, the base film for pressure-sensitive adhesive sheets according to the present invention contains a polyester-based plasticizer as a plasticizer, and contains a high molecular weight polyresin, a metal soap and hydrotalcite as a stabilizer. Since it is composed of a vinyl chloride resin composition that is compounded in combination, when such a resin composition is formed into a film by calendering, it has excellent thermal stability and is not susceptible to unwanted decomposition or coloring. Etc. does not occur, moreover, when the resulting base film is provided with a pressure-sensitive adhesive layer to form a pressure-sensitive adhesive sheet, since the polyester-based plasticizer does not migrate to the pressure-sensitive adhesive layer, even after a long period of time, Its adhesive strength does not decrease significantly, and it maintains almost the original value. Furthermore, the substrate film according to the invention hardly causes any undesired discoloration even after a long period of time.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０８Ｋ 5/098 Ｃ０８Ｌ 27/06 Ｃ０８Ｌ 27/06 67:00 //(Ｃ０８Ｌ 27/06 63:00 67:00 Ｂ２９Ｋ 27:06 63:00） Ｂ２９Ｌ 7:00 Ｂ２９Ｋ 27:06 Ａ６１Ｌ 15/06 Ｂ２９Ｌ 7:00 (58)調査した分野(Int.Cl.7，ＤＢ名) C09J 7/02 A61L 15/58 B29C 43/24 C08J 5/18 CEV C08K 3/26 C08K 5/098 C08L 27/06 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI C08K 5/098 C08L 27/06 C08L 27/06 67:00 // (C08L 27/06 63:00 67:00 B29K 27:06 63:00) B29L 7:00 B29K 27:06 A61L 15/06 B29L 7:00 (58) Fields surveyed (Int.Cl. 7 , DB name) C09J 7/02 A61L 15/58 B29C 43/24 C08J 5 / 18 CEV C08K 3/26 C08K 5/098 C08L 27/06
Claims (6)
て、数平均分子量が１５００〜３０００の範囲のポリエ
ステル系可塑剤３０〜７０重量部と、重量平均分子量２
０００〜２００００のエポキシ樹脂３〜２０重量部と、
脂肪酸カルシウム−脂肪酸亜鉛の組合わせからなる安定
剤の適量と、ハイドロタルサイト0.１〜1.０重量部とか
らなることを特徴とする皮膚貼付用粘着シートのための
基材フィルム。1. A polyester plasticizer having a number average molecular weight of 1500 to 3000 and a weight average molecular weight of 2 to 100 parts by weight of a vinyl chloride polymer.
000 to 20,000 epoxy resin 3 to 20 parts by weight,
Stable consisting of fatty acid calcium-fatty acid zinc combination
A base film for a pressure-sensitive adhesive sheet for skin application , which comprises an appropriate amount of an agent and 0.1 to 1.0 parts by weight of hydrotalcite.
る請求項１に記載の皮膚貼付用粘着シートのための基材
フィルム。2. The base film for a pressure-sensitive adhesive sheet for skin application according to claim 1, wherein the vinyl chloride polymer is polyvinyl chloride.
なる救急絆創膏用基材フィルム。3. A base film for an emergency bandage, which comprises the base film according to claim 1 or 2.
て、数平均分子量が１５００〜３０００の範囲のポリエ
ステル系可塑剤３０〜７０重量部と、重量平均分子量２
０００〜２００００のエポキシ樹脂３〜２０重量部と、
脂肪酸カルシウム−脂肪酸亜鉛の組合わせからなる安定
剤の適量と、ハイドロタルサイト0.１〜1.０重量部とか
らなる樹脂組成物をカレンダー加工にてフィルムにする
ことを特徴とする皮膚貼付用粘着シートのための基材フ
ィルムの製造方法。4. A polyester plasticizer having a number average molecular weight of 1500 to 3000 and a weight average molecular weight of 2 to 100 parts by weight of a vinyl chloride polymer.
000 to 20,000 epoxy resin 3 to 20 parts by weight,
Stable consisting of fatty acid calcium-fatty acid zinc combination
A method for producing a base film for a pressure-sensitive adhesive sheet for skin application , which comprises calendering a resin composition comprising an appropriate amount of an agent and 0.1 to 1.0 parts by weight of hydrotalcite into a film. .
る請求項４に記載の方法。5. The method according to claim 4 , wherein the vinyl chloride polymer is polyvinyl chloride.
ムが救急絆創膏用基材フィルムである請求項４又は５に
記載の方法。6. The method according to claim 4 , wherein the base film for the adhesive sheet for sticking to the skin is a base film for a first aid bandage.
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|---|---|---|---|
| JP28114199A JP3384552B2 (en) | 1999-10-01 | 1999-10-01 | Base film for pressure-sensitive adhesive sheet and method for producing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28114199A JP3384552B2 (en) | 1999-10-01 | 1999-10-01 | Base film for pressure-sensitive adhesive sheet and method for producing the same |
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| Publication Number | Publication Date |
|---|---|
| JP2001106990A JP2001106990A (en) | 2001-04-17 |
| JP3384552B2 true JP3384552B2 (en) | 2003-03-10 |
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ID=17634946
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008138123A (en) * | 2006-12-04 | 2008-06-19 | Mitsubishi Plastics Ind Ltd | Vinyl chloride-based resin composition and stretch film for food package |
| WO2008075510A1 (en) * | 2006-12-21 | 2008-06-26 | Mizusawa Industrial Chemicals, Ltd. | Stabilizer for chlorinated polymer and chlorinated-polymer composition |
| JP5294586B2 (en) * | 2006-12-21 | 2013-09-18 | 水澤化学工業株式会社 | Chlorine-containing polymer stabilizer and chlorine-containing polymer composition |
| CN103608902B (en) * | 2011-06-27 | 2016-05-11 | 电化株式会社 | Bonding sheet |
| JP7242224B2 (en) * | 2018-09-10 | 2023-03-20 | リケンテクノス株式会社 | Polyvinyl chloride resin composition |
| JP7461822B2 (en) * | 2019-09-12 | 2024-04-04 | 日本カーバイド工業株式会社 | Adhesive sheet |
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