JP2004160211A - Air-permeable pressure sensitive self-adhesive tape - Google Patents
Air-permeable pressure sensitive self-adhesive tape Download PDFInfo
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本発明は、通気性粘着テープに関し、詳しくは、医療用貼付製品として好適に用いられる通気性粘着テープに関する。なお、本発明における通気性粘着テープには、通気性粘着シート及びフィルムも含まれるものとする。 The present invention relates to a gas-permeable pressure-sensitive adhesive tape, and more particularly, to a gas-permeable pressure-sensitive adhesive tape suitably used as a medical patch product. The air-permeable pressure-sensitive adhesive tape in the present invention includes a gas-permeable pressure-sensitive adhesive sheet and a film.
従来、医療用貼付製品として粘着包帯、絆創膏、サージカルテープ等が使用されているが、これらを直接人体に長時間貼り付けておくと皮膚表面からの水分の蒸発が妨げられ、かゆみやかぶれ等が生じるという問題があり、医療用粘着テープには通気性が要求されている。 Conventionally, adhesive bandages, adhesive plasters, surgical tapes, and the like have been used as medical adhesive products, but if these are directly adhered to the human body for a long time, evaporation of water from the skin surface is prevented, and itching or rash occurs. Therefore, air permeability is required for the medical adhesive tape.
一般に粘着テープに通気性を付与する方法としては、（１）粘着テープに貫通孔を形成させる方法、（２）アクリル系粘着剤に過酸化ベンゾイル等の過酸化物を配合し、高温で架橋する方法、（３）アクリル系粘着剤に架橋剤を配合し高温で架橋する方法等がある。 Generally, methods for imparting air permeability to an adhesive tape include (1) a method of forming a through hole in the adhesive tape, and (2) a peroxide such as benzoyl peroxide mixed with an acrylic adhesive and crosslinking at a high temperature. And (3) a method in which a crosslinking agent is blended with an acrylic pressure-sensitive adhesive and crosslinking is performed at a high temperature.
しかし、上記（１）の方法では、生産工程が複雑で且つ生産性が悪い、（２）の方法では、過酸化物の分解による臭気が強く、再粘着性が悪い、（３）の方法では、上記臭気等の問題は無いが、再粘着性が悪いという問題があった。 However, in the method (1), the production process is complicated and the productivity is low. In the method (2), the odor due to the decomposition of the peroxide is strong, and the re-adhesion is poor. In the method (3), Although there is no problem of the above-mentioned odor and the like, there is a problem that re-adhesion is poor.
また、上記以外の方法として、通気性を有する基材にアクリル系粘着剤層が積層された粘着テープを８５℃以上の温度で１時間半以上加熱養生することにより、粘着剤層の貯蔵弾性率（Ｇ'）を３．０×１０4 Ｐａ以下にすることを特徴とする通気性粘着テープの製造方法が提案されているが、この方法では、通気性の優れた粘着テープが得られるが、再粘着性が不十分であった。（例えば、特許文献１参照。） In addition, as another method, a storage elastic modulus of the pressure-sensitive adhesive layer is obtained by heating and curing an adhesive tape in which an acrylic pressure-sensitive adhesive layer is laminated on a breathable substrate at a temperature of 85 ° C. or more for one and a half hours or more. A method for producing a gas-permeable pressure-sensitive adhesive tape characterized in that (G ′) is 3.0 × 10 4 Pa or less has been proposed. In this method, a pressure-sensitive adhesive tape with excellent gas-permeability is obtained. The re-adhesion was insufficient. (For example, refer to Patent Document 1.)
上記再粘着性が不十分とは、医療用貼付製品をいったん皮膚等に貼付した後、貼り直し等で再使用する場合、皮膚の角質層などを剥がし（むしり取り）、再貼付し難くなることを言うが、医療用分野においては粘着性が高くなりすぎると貼り直した際に、角質層が剥がれて再貼付し難くなると共に皮膚が痛む（ヒリヒリする）という問題があった。
本発明は、上記欠点に鑑み、良好な通気性を有し、かつ、粘着力と再粘着性のバランスが優れているとともに、医療用貼付製品として好適に使用しうる通気性粘着テープを提供することを目的とする。 The present invention, in view of the above drawbacks, provides a gas-permeable pressure-sensitive adhesive tape having good air-permeability, and having an excellent balance between adhesion and re-adhesion, and which can be suitably used as a medical patch product. The purpose is to:
本発明の通気性粘着テープは、通気性を有する基材の片面に、官能基を有するアクリル系共重合体１００重量部に対して、該官能基と反応し得る官能基を有する架橋剤の有効量、及び該アクリル系共重合体と非相溶の化合物２〜１５重量部よりなり、ゲル分率が２０〜６０重量％の粘着剤が積層されてなるものである。 The air-permeable pressure-sensitive adhesive tape of the present invention is characterized in that a cross-linking agent having a functional group capable of reacting with a functional group is used on one side of a gas-permeable substrate, based on 100 parts by weight of an acrylic copolymer having a functional group. And an adhesive having a gel fraction of 20 to 60% by weight, comprising 2 to 15 parts by weight of a compound incompatible with the acrylic copolymer.
以下に、本発明を詳細に説明する。
本発明で使用される基材は、通気性を有するものであれば特に限定されず、例えば、パルプ、マニラ麻、綿布、ポリエステル繊維、レーヨン繊維、ナイロン繊維、アクリル繊維、ビニロン繊維、スパン繊維、ウレタン繊維等、又はこれらの混合繊維からなる不織布、織布等が挙げられる。
又、パルプ、マニラ麻、レーヨン繊維等の繊維からなる不織布は、層間強度を向上させるためにアクリル樹脂等の樹脂が含侵されたものが好ましい。
上記基材は、粘着剤が含浸され易い点で、ＪＩＳ−Ｐ−８１１７に規定される通気度が２秒以下のものが好ましい。
尚、通気度とは、ＪＩＳ Ｐ ８１１７ に準拠して測定した値であって、「通気度が２秒／３００ｃｍ3 （空気）以下」とは、３００ｃｍ3 の空気が面積４５ｍｍ2 の試験片を２秒以下で通過することを意味する。
Hereinafter, the present invention will be described in detail.
The substrate used in the present invention is not particularly limited as long as it has air permeability, and examples thereof include pulp, manila hemp, cotton cloth, polyester fiber, rayon fiber, nylon fiber, acrylic fiber, vinylon fiber, spun fiber, and urethane. Nonwoven fabrics, woven fabrics, and the like made of fibers and the like, or a mixed fiber thereof.
Further, the non-woven fabric made of fibers such as pulp, manila hemp, rayon fiber and the like is preferably impregnated with a resin such as an acrylic resin in order to improve interlayer strength.
The base material preferably has a permeability of 2 seconds or less specified in JIS-P-8117 in that the pressure-sensitive adhesive is easily impregnated.
The air permeability is a value measured in accordance with JIS P 8117, and “air permeability is 2 seconds / 300 cm 3 (air) or less” means that 300 cm 3 air is a test piece having an area of 45 mm 2. It means passing in less than 2 seconds.
上記粘着剤は、官能基を有するアクリル系共重合体１００重量部に対して、該官能基と反応し得る官能基を有する架橋剤の有効量、及び該官能基と反応し得る官能基を有する架橋剤の有効量、及び該アクリル系共重合体と非相溶の化合物２〜１５重量部よりなり、ゲル分率は２０〜６０重量％である。 The pressure-sensitive adhesive has an effective amount of a crosslinking agent having a functional group capable of reacting with the functional group, and a functional group capable of reacting with the functional group, based on 100 parts by weight of the acrylic copolymer having the functional group. It consists of an effective amount of a crosslinking agent and 2 to 15 parts by weight of a compound incompatible with the acrylic copolymer, and has a gel fraction of 20 to 60% by weight.
上記官能基を有するアクリル系共重合体としては、特に限定されないが、例えば、アルキル (メタ) アクリレートを主体とし、該アルキル (メタ) アクリレートと共重合可能な官能基含有モノマーとの共重合体が挙げられる。
尚、(メタ) アクリレートとは、アクリレート又はメタクリレートを意味する。
The acrylic copolymer having the functional group is not particularly limited, for example, an alkyl (meth) acrylate is mainly composed of a copolymer of a functional group-containing monomer copolymerizable with the alkyl (meth) acrylate No.
In addition, (meth) acrylate means acrylate or methacrylate.
上記アルキル (メタ) アクリレートとしては、例えば、エチル (メタ)アクリレート、ｎ−プロピル (メタ)アクリレート、イソプロピル (メタ)アクリレート、ｎ−ブチル (メタ)アクリレート、イソブチル (メタ)アクリレート、２−エチルヘキシル (メタ)アクリレート等が挙げられる。
上記官能基含有モノマーは、アクリル系共重合体において架橋基点となるべく共重合されるもので、カルボキシル基を含有していることが好ましく、例えば、アクリル酸、メタクリル酸、イタコン酸、クロトン酸、無水マレイン酸等のモノマーが挙げられる。
Examples of the alkyl (meth) acrylate include ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate. ) Acrylate and the like.
The functional group-containing monomer is copolymerized to be a cross-linking point in the acrylic copolymer, and preferably contains a carboxyl group.For example, acrylic acid, methacrylic acid, itaconic acid, crotonic acid, anhydride And monomers such as maleic acid.
上記アクリル系共重合体の平均分子量は、ゲルパーミエーションクロマトグラフ（ＧＰＣ）法により、スチレン換算分子量として測定された重量平均分子量が４０万〜８０万が好ましい。 The average molecular weight of the acrylic copolymer is preferably 400,000 to 800,000, as measured by gel permeation chromatography (GPC) as a molecular weight in terms of styrene.
上記粘着剤に用いられる該官能基と反応し得る官能基を有する架橋剤としては、特に限定されず、例えば、イソシアネート基を有する架橋剤、エポキシ基を有する架橋剤、アジリジン基を有する架橋剤などが挙げられ、イソシアネート基を有する架橋剤が架橋密度の点で好ましく用いられる。
好ましいイソシアネート基を有する架橋剤としては、例えば、コロネートＬ（日本ポリウレタン社製）が挙げられる。
また、イソシアネート基を有する架橋剤とエポキシ基を有する架橋剤を併用しても良い。
The crosslinking agent having a functional group capable of reacting with the functional group used in the pressure-sensitive adhesive is not particularly limited, and examples thereof include a crosslinking agent having an isocyanate group, a crosslinking agent having an epoxy group, and a crosslinking agent having an aziridine group. And a crosslinking agent having an isocyanate group is preferably used in terms of crosslinking density.
Preferable examples of the crosslinking agent having an isocyanate group include Coronate L (manufactured by Nippon Polyurethane Industry Co., Ltd.).
Further, a crosslinking agent having an isocyanate group and a crosslinking agent having an epoxy group may be used in combination.
架橋剤の添加量は、特に限定されるものではないが、添加量が少なくなると、架橋密度が低下し、粘着テープを剥離紙や皮膚から剥離する際に糊残りが発生しやすくなり、多くなると、粘着性が低下し、皮膚に対して貼付しにくくなると共に、ゲル分率が高くなり架橋密度が高くなるため流動性が低下して十分な通気性が得られなくなるので、アクリル系共重合体１００重量部に対し０．５〜５．０重量部が好ましい。 The addition amount of the crosslinking agent is not particularly limited, but when the addition amount is small, the crosslinking density is reduced, and when the pressure-sensitive adhesive tape is released from the release paper or the skin, the adhesive residue tends to be generated, and when the amount is increased, Acrylic copolymers, because the adhesiveness is reduced and it becomes difficult to adhere to the skin, and the gel fraction is increased and the crosslinking density is increased, so that the fluidity is reduced and sufficient air permeability cannot be obtained. 0.5 to 5.0 parts by weight per 100 parts by weight is preferred.
尚、架橋方法は任意の方法が採用されてよく、例えば、加熱養生法、放射線照射法等が挙げられる。 In addition, an arbitrary method may be adopted as a crosslinking method, and examples thereof include a heat curing method and a radiation irradiation method.
アクリル系共重合体と非相溶の化合物の重量平均分子量は、小さくなるとアクリル系共重合体との相溶性が向上し、大きくなると相溶性が低下するので、３００〜１００００が好ましい。 The weight average molecular weight of the compound that is incompatible with the acrylic copolymer is preferably 300 to 10,000 since the smaller the weight average molecular weight, the higher the compatibility with the acrylic copolymer and the larger the weight, the lower the compatibility.
上記非相溶の化合物としては、該アクリル系共重合体と非相溶であれば特には限定されないが、架橋剤と反応し得る官能基を有する化合物が好ましく、例えば、水酸基を有するポリオキシアルキレン重合体が挙げられる。 The incompatible compound is not particularly limited as long as it is incompatible with the acrylic copolymer, and is preferably a compound having a functional group capable of reacting with a crosslinking agent, for example, a polyoxyalkylene having a hydroxyl group. Polymers.
上記ポリオキシアルキレン重合体は、主鎖がポリエーテル構造のポリアルキレンであり、例えば、ポリエチレングリコール、ポリプロピレングリコール、ポリトリメチレングリコール、ポリテトラメチレングリコール等のホモポリマー、オキシエチレン−オキシプロピレン共重合体等が挙げられる。 The polyoxyalkylene polymer is a polyalkylene having a polyether structure in the main chain, for example, a homopolymer such as polyethylene glycol, polypropylene glycol, polytrimethylene glycol, and polytetramethylene glycol, and an oxyethylene-oxypropylene copolymer. And the like.
上記ポリオキシアルキレン重合体の添加量は、少なくなると粘着剤層の通気性が低下し、多くなると基材の背面に滲み出し、外観が悪くなると共に通気性粘着テープの巻き出しが困難になることがあるので、アクリル系共重合体１００重量部に対し２〜１５重量部が好ましい。 When the addition amount of the polyoxyalkylene polymer is small, the permeability of the pressure-sensitive adhesive layer is reduced, and when the amount is large, the pressure-sensitive adhesive layer oozes on the back surface of the base material, and the appearance is deteriorated and the unwinding of the gas-permeable pressure-sensitive adhesive tape becomes difficult. Therefore, the amount is preferably 2 to 15 parts by weight based on 100 parts by weight of the acrylic copolymer.
上記粘着剤のゲル分率は、架橋密度の目安となり、低くなると粘着テープを剥離紙や皮膚から剥離する際に糊残りが発生しやすくなり、高くなると、粘着性が低下し、皮膚に対して貼付しにくくなると共に、流動性が低下して十分な通気性が得られなくなるので、２０〜６０重量％が好ましく、より好ましくは３０〜６０重量％である。 The gel fraction of the pressure-sensitive adhesive is a measure of the cross-linking density, and when the pressure-sensitive adhesive tape is released, the adhesive tape is likely to be left when the pressure-sensitive adhesive tape is peeled off from the release paper or the skin. 20-60% by weight is preferable, and more preferably 30-60% by weight, because it becomes difficult to adhere, and the fluidity is lowered and sufficient air permeability cannot be obtained.
本発明の粘着剤には、本発明の効果を損なわない範囲内で、一般に粘着剤に添加されている、粘着付与剤、無機充填剤、老化防止剤、酸化防止剤、紫外線吸収剤、顔料等が添加されてもよい。 In the pressure-sensitive adhesive of the present invention, a tackifier, an inorganic filler, an antioxidant, an antioxidant, an ultraviolet absorber, a pigment and the like which are generally added to the pressure-sensitive adhesive within a range not impairing the effects of the present invention. May be added.
本発明の通気性粘着テープは、上記基材の片面に上記粘着剤が２０〜７０ｇ／ｍ2 積層されてなり、通気度が２０秒／３００ｃｍ3 （空気）以下であることが好ましい。 The air-permeable pressure-sensitive adhesive tape of the present invention is preferably formed by laminating the above-mentioned pressure-sensitive adhesive on one surface of the above-mentioned substrate in an amount of 20 to 70 g / m 2 , and has an air permeability of 20 seconds / 300 cm 3 (air) or less.
上記粘着剤は、積層量が少なくなると十分な粘着性が得られにくくなり、多くなると通気性が低下するので、１ｍ2 あたり２０〜７０ｇ積層されることが好ましい。 The pressure-sensitive adhesive, when the amount of stacking decreases sufficient tackiness is hardly obtained, since the air permeability becomes much reduced, it is preferable to be 20~70g stacked per 1 m 2.
上記積層方法としては、特に限定されず、例えば、上記粘着剤を直接基材の片面に塗工する方法、予め離型紙上に粘着剤を塗工し、粘着剤層を形成した後、得られた粘着剤層を基材に転写し積層する方法が挙げられ、転写する方法が好適に用いられる。 The lamination method is not particularly limited, for example, a method in which the pressure-sensitive adhesive is directly applied to one surface of a substrate, a pressure-sensitive adhesive is previously coated on release paper, and a pressure-sensitive adhesive layer is formed. The method of transferring and laminating the pressure-sensitive adhesive layer onto a substrate is preferably used.
上記離型紙は、粘着テープ用に使用されている任意の離型紙が使用可能であり、例えば、クラフト紙、クルパック紙、上質紙等の紙や、ポリエチレン、ポリプロピレン、ポリエステル、ポリウレタン等の合成樹脂フィルム及びその積層フィルムの表面に長鎖アルキル系離型剤、シリコーン系離型剤等の離型剤を塗布したものが挙げられる。 As the release paper, any release paper used for the adhesive tape can be used, for example, paper such as kraft paper, crapak paper, high-quality paper, and synthetic resin films such as polyethylene, polypropylene, polyester, and polyurethane. And those obtained by applying a release agent such as a long-chain alkyl release agent or a silicone release agent to the surface of the laminated film.
離型紙上に粘着剤を塗工する方法は、従来公知の任意の方法が適用可能であり、例えば、粘着剤がホットメルトタイプの場合は、押出機で加熱溶融して離型紙に押出塗工する方法、粘着剤が溶剤タイプやエマルジョンタイプの場合は、粘着剤の固形分が２０〜７０ｇ／ｍ2 になるように、ナイフコーター、バーコーター等で離型紙に塗布し加熱乾燥する方法が挙げられる。 As the method of applying the adhesive on the release paper, any conventionally known method can be applied. For example, when the adhesive is a hot melt type, the adhesive is heated and melted by an extruder and extrusion coated on the release paper. When the pressure-sensitive adhesive is a solvent type or an emulsion type, a method in which the pressure-sensitive adhesive is applied to release paper with a knife coater, a bar coater, or the like so that the solid content of the pressure-sensitive adhesive is 20 to 70 g / m 2 , and then heated and dried. Can be
離型紙上に塗工形成された粘着剤層は、基材と重ねあわされ、転写され、次いで、熟成することにより、通気性粘着テープが得られる。 The pressure-sensitive adhesive layer formed on the release paper is overlapped with the substrate, transferred, and then aged to obtain a breathable pressure-sensitive adhesive tape.
上記熟成方法としては、例えば、所定の温度に調節された加熱養生室中に所定の時間放置し、その後常温にて冷却する方法等が挙げられ、４０〜９０℃の温度で２０〜６０時間熟成することが好ましい。 The ripening method includes, for example, a method in which the material is left in a heating curing room adjusted to a predetermined temperature for a predetermined time and then cooled at room temperature, and is aged at a temperature of 40 to 90 ° C. for 20 to 60 hours. Is preferred.
熟成温度が、４０℃未満の場合には、架橋密度が低くなって糊残りが発生しやすくなり、９０℃を超えると、基材として白色の不織布や織布を使用した場合、黄変したり、粘着剤が劣化する。 When the aging temperature is lower than 40 ° C., the crosslink density is low and adhesive residue is liable to occur. When the temperature is higher than 90 ° C., when a white nonwoven fabric or woven fabric is used as a base material, yellowing occurs. , The adhesive deteriorates.
熟成時間が、２０時間未満の場合には架橋密度が低くなって糊残りが発生しやすくなり、６０時間を超えると、基材として白色の不織布や織布を使用した場合、黄変したり、粘着剤が劣化する。 When the aging time is less than 20 hours, the crosslink density is low and adhesive residue is likely to be generated. When the aging time is more than 60 hours, when a white nonwoven fabric or woven fabric is used as a base material, yellowing or The adhesive deteriorates.
上記通気性粘着テープの通気度は、低下すると通気性粘着テープを人体に長時間貼り付けておくと、皮膚表面からの水分の蒸発が妨げられ、紅斑、かゆみ、かぶれ等が生じるようになるので、２０秒／３００ｃｍ3 （空気）以下であることが好ましい。 When the air permeability of the air-permeable adhesive tape decreases, if the air-permeable adhesive tape is attached to a human body for a long time, evaporation of water from the skin surface is prevented, and erythema, itching, rash, etc. will occur. , 20 seconds / 300 cm 3 (air) or less.
本発明において、通気性を有する基材の片面に、アクリル系共重合体に対して、架橋剤の有効量、及び該アクリル系共重合体と非相溶の化合物よりなり、ゲル分率が２０〜６０重量％の粘着剤を積層しているので、優れた通気性を有すると共に、粘着力と再粘着性のバランスに優れた通気性粘着テープを提供することができる。 In the present invention, on one side of the air-permeable base material, an effective amount of a crosslinking agent with respect to the acrylic copolymer, and a compound incompatible with the acrylic copolymer, and having a gel fraction of 20 Since the adhesive of up to 60% by weight is laminated, it is possible to provide a gas-permeable pressure-sensitive adhesive tape having excellent air-permeability and an excellent balance between adhesion and re-adhesion.
以下、実施例を挙げて本発明をより詳しく説明する。なお、本発明は以下の実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to examples. Note that the present invention is not limited to the following examples.
（実施例１〜６、比較例１〜６）
表１に示した所定量のアクリル系共重合体（重量平均分子量６０万）、イソシアネート系架橋剤（日本ポリウレタン社製、商品名「コロネートＬ−５５Ｅ」）、ポリエチレングリコール（三洋化成工業社製、商品名「マルコゴール４００」、重量平均分子量４００）及びポリプロピレングリコール（三洋化成工業社製、商品名「ポリプロピレングリコール２０００」、重量平均分子量２０００）を混合して粘着剤を得た。
(Examples 1 to 6, Comparative Examples 1 to 6)
A predetermined amount of an acrylic copolymer (weight-average molecular weight: 600,000), an isocyanate-based crosslinking agent (trade name "Coronate L-55E", manufactured by Nippon Polyurethane Co., Ltd.), polyethylene glycol (manufactured by Sanyo Chemical Industries, Ltd.) shown in Table 1 An adhesive was obtained by mixing “Marcogol 400” (trade name, weight average molecular weight 400) and polypropylene glycol (trade name “polypropylene glycol 2000”, weight average molecular weight 2000, manufactured by Sanyo Chemical Industries, Ltd.).
上質紙の表面にポリウレタンがラミネートされ、更にその面がシリコーン加工処理された離型紙上に、得られた粘着剤を、表１に示した所定量塗工乾燥し、その上から基材（カネボウ社製、商品名「エスパンシオーネＵ１３−７５」、ウレタン樹脂系不織布、（通気度０．７秒／３００ｃｍ3 （空気）、坪量７５ｇ／ｍ2 ）を貼り合わせ、ロール状に巻取り、巻重体を得た。 A predetermined amount of adhesive, as shown in Table 1, was applied and dried on release paper, on which polyurethane was laminated on the surface of high-quality paper, and the surface of which was further subjected to silicone processing. Company, trade name "Espancione U13-75", urethane resin nonwoven fabric, (air permeability 0.7 seconds / 300 cm 3 (air), basis weight 75 g / m 2 ), and rolled up, A roll was obtained.
得られた巻重体を加熱養生室に供給し、表１に示した所定温度で所定時間養生し通気性粘着テープを得た。 The obtained wound body was supplied to a heating curing room and cured at a predetermined temperature shown in Table 1 for a predetermined time to obtain a breathable adhesive tape.
得られた通気性粘着テープを用いて、ゲル分率、通気度、粘着力、ボールタック、皮膚密着性、再粘着性、皮膚刺激性、糊残り性及び基材変色性を測定し、表１に結果を示した。尚、測定方法は下記の通りであった。 Using the obtained air-permeable pressure-sensitive adhesive tape, the gel fraction, air permeability, adhesive strength, ball tack, skin adhesion, re-adhesion, skin irritation, adhesive residue and substrate discoloration were measured. The results are shown in FIG. In addition, the measuring method was as follows.
（１）ゲル分率 １５ｍｍ幅×３０ｍｍ長さの短冊状試験片を作製し、離型紙を剥離し、通気性粘着テープ部分を４０℃の酢酸エチルに４８時間浸漬した。浸漬後、真鍮繊維製ゲルボックスを用い、酢酸エチル溶液をろ過し、ゾル分とゲル分を分離した。 (1) Gel fraction A strip-shaped test piece having a width of 15 mm and a length of 30 mm was prepared, the release paper was peeled off, and the air-permeable adhesive tape was immersed in ethyl acetate at 40 ° C for 48 hours. After the immersion, the ethyl acetate solution was filtered using a brass fiber gel box to separate a sol component and a gel component.
ゲル分をゲルボックスと一緒に室温で２４時間乾燥し、秤量して下記式でゲル分率を計算した。
ゲル分率（重量％）＝｛Ｗ（Ｄ）−Ｗ（Ｅ）−Ｗ（Ｃ）｝×１００／｛Ｗ（Ａ）−Ｗ（Ｂ）−Ｗ（Ｃ）｝
The gel fraction was dried together with the gel box at room temperature for 24 hours, weighed, and the gel fraction was calculated by the following formula.
Gel fraction (% by weight) = {W (D) −W (E) −W (C)} × 100 / {W (A) −W (B) −W (C)}
Ｗ（Ａ）：通気性粘着テープ重量＋離型紙重量
Ｗ（Ｂ）：離型紙重量
Ｗ（Ｃ）：テープ基材重量
Ｗ（Ｄ）：通気性粘着テープ重量＋ゲルボックス重量（乾燥後）
Ｗ（Ｅ）：ゲルボックス重量
W (A): Weight of air-permeable adhesive tape + weight of release paper W (B): Weight of release paper W (C): Weight of tape base material W (D): Weight of air-permeable adhesive tape + gel box weight (after drying)
W (E): Gel box weight
（２）通気度 ＪＩＳ Ｐ ８１１７に準拠し、デンソメータ通気時間（３００ｃｍ3 の空気が４５ｍｍ2 の通気性粘着テープを通過する時間）を測定した。 (2) Air permeability According to JIS P 8117, a densometer ventilation time (time during which 300 cm 3 of air passes through a 45 mm 2 air-permeable adhesive tape) was measured.
（３）粘着力 ＪＩＳ Ｚ ０２３７に準拠し、ステンレス板（ＳＵＳ＃３０４）に対する１８０度剥離粘着力（Ｎ／１２ｍｍ）を測定した。
（４）ボールタック Ｊ−Ｄｏｗ法（ＪＩＳ Ｚ ０２３７）に準拠して測定した。
(3) Adhesive force A 180-degree peel adhesive force (N / 12 mm) to a stainless steel plate (SUS # 304) was measured in accordance with JIS Z 0237.
(4) Ball tack The ball tack was measured according to the J-Dow method (JIS Z 0237).
（５）皮膚密着性 直径２２ｍｍの円形試験片を作製し、人体の上腕部に３日間貼付し、剥離状態を目視で観察し、以下の通り評価した。尚、１日あたり３０分間、４０℃の温水に浸漬した。
○：剥離なし
△：一部剥離
×：全面剥離
(5) Skin Adhesion A circular test piece having a diameter of 22 mm was prepared, attached to the upper arm of a human body for 3 days, and the peeled state was visually observed and evaluated as follows. In addition, it was immersed in warm water of 40 ° C. for 30 minutes per day.
○: No peeling △: Partial peeling ×: Full peeling
（６）再粘着性 １２ｍｍ幅×２００ｍｍ長さの短冊状試験片を作製し、５０ｍｍ長さ部分を人体の上腕部に貼付し、１５分間放置後、粘着力測定器ショッパーに試験片の先端部を装着し、１８０度剥離力を測定した。測定は同一試験片を用いて、人体の上腕部に貼付及び剥離力測定を３回繰り返した。 (6) Re-adhesiveness A strip-shaped test piece having a width of 12 mm and a length of 200 mm was prepared, a 50-mm length portion was stuck to the upper arm of a human body, and left for 15 minutes. Was attached, and the 180 degree peeling force was measured. For the measurement, the same test piece was used, and the sticking and peeling force measurement on the upper arm of the human body were repeated three times.
（７）皮膚刺激性 直径２２ｍｍの円形試験片を作製し、人体の上腕部に３日間貼付し、貼付時のカユミの有無を観察した。尚、１日あたり３０分間、４０℃の温水に浸漬した。 (7) Skin irritation A circular test piece having a diameter of 22 mm was prepared and attached to the upper arm of a human body for 3 days, and the presence or absence of Kayumi at the time of application was observed. It was immersed in warm water of 40 ° C. for 30 minutes per day.
又、３日後に剥離し、剥離時の皮膚の痛みの有無、剥離部分に相当する皮膚部分の紅班の有無及びカユミの有無を観察し、以下の通り評価した。 After 3 days, the skin was peeled off, and the skin was observed for pain at the time of peeling, the presence of erythema on the skin corresponding to the peeled part, and the presence of Kayumi were evaluated as follows.
貼付時のカユミ ○：カユミなし
△：軽いカユミ発生
×：激しいカユミ発生
剥離時の皮膚の痛み ○：皮膚の痛みなし
△：皮膚の痛みわずか
×：激しい皮膚の痛み
Kayumi when pasting ○: No Kayumi
△: Light Kayumi occurred
×: Severe Kayumi generation Skin pain at peeling ○: No skin pain
△: slight skin pain
×: severe skin pain
剥離後の皮膚の紅班 ○：紅班の面積が０
△：紅班の面積が１〜３割
×：紅班の面積が３割以上
剥離後のカユミ ○：カユミなし
△：軽いカユミ発生
×：激しいカユミ発生
Erythema on the skin after exfoliation ○: Area of erythema is 0
△: The area of erythema is 10 to 30%
×: Red area is 30% or more Kayumi after peeling ○: No Kayumi
△: Light Kayumi occurred
×: Violent occurrence of Kayumi
（８）糊残り性 直径２２ｍｍの円形試験片を作製し、人体の上腕部に３日間貼付し、１日あたり３０分間、４０℃の温水に浸漬した。３日後に試験片を剥離し、皮膚上の糊残りの有無を目視で観察し、以下の通り評価した。
○：糊残りほぼなし
△：糊残りの面積が１〜３割
×：糊残りの面積が３割以上
(8) Adhesive Retentivity A circular test piece having a diameter of 22 mm was prepared, attached to the upper arm of a human body for 3 days, and immersed in warm water at 40 ° C. for 30 minutes per day. Three days later, the test piece was peeled off, and the presence or absence of adhesive residue on the skin was visually observed and evaluated as follows.
：: Almost no adhesive residue △: 10 to 30% of remaining adhesive area ×: 30% or more of remaining adhesive area
（９）基材変色性 熟成後の基材の変色の有無を目視で観察し、以下の通り評価した。
○：変色なし
△：わずかに変色あり
×：変色あり
(9) Discoloration of base material The presence or absence of discoloration of the base material after aging was visually observed and evaluated as follows.
：: no discoloration Δ: slight discoloration ×: discoloration
Claims (3)
The air-permeable pressure-sensitive adhesive tape according to claim 1 or 2, wherein the compound incompatible with the acrylic copolymer has a weight average molecular weight of 300 to 10,000.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003352560A JP2004160211A (en) | 2002-10-21 | 2003-10-10 | Air-permeable pressure sensitive self-adhesive tape |
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| JP2002305965 | 2002-10-21 | ||
| JP2003352560A JP2004160211A (en) | 2002-10-21 | 2003-10-10 | Air-permeable pressure sensitive self-adhesive tape |
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| JP2004160211A true JP2004160211A (en) | 2004-06-10 |
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| JP2008036885A (en) * | 2006-08-02 | 2008-02-21 | Nitto Denko Corp | Adsorbent film, its manufacturing method, adsorbent film with mold release film and its manufacturing method |
| JP2012162089A (en) * | 2012-05-21 | 2012-08-30 | Nitto Denko Corp | Adsorption film and adsorption film with mold release film |
| CN109072020A (en) * | 2016-04-28 | 2018-12-21 | 日本瑞翁株式会社 | Self adhesion layer |
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| JP2012162089A (en) * | 2012-05-21 | 2012-08-30 | Nitto Denko Corp | Adsorption film and adsorption film with mold release film |
| CN109072020A (en) * | 2016-04-28 | 2018-12-21 | 日本瑞翁株式会社 | Self adhesion layer |
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