JP2017536894A - アクリル系粘着シート、医療用粘着テープ、及び製造方法 - Google Patents
アクリル系粘着シート、医療用粘着テープ、及び製造方法 Download PDFInfo
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- JP2017536894A JP2017536894A JP2017528806A JP2017528806A JP2017536894A JP 2017536894 A JP2017536894 A JP 2017536894A JP 2017528806 A JP2017528806 A JP 2017528806A JP 2017528806 A JP2017528806 A JP 2017528806A JP 2017536894 A JP2017536894 A JP 2017536894A
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- JP
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- Prior art keywords
- sensitive adhesive
- temperature
- acrylic
- adhesive sheet
- acrylic pressure
- 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
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- 238000004519 manufacturing process Methods 0.000 title claims description 24
- 239000002390 adhesive tape Substances 0.000 title claims description 21
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 131
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 123
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011148 porous material Substances 0.000 claims abstract description 24
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- 238000005187 foaming Methods 0.000 claims description 36
- 239000004925 Acrylic resin Substances 0.000 claims description 31
- 229920000178 Acrylic resin Polymers 0.000 claims description 31
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- 238000000034 method Methods 0.000 claims description 22
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- 239000003431 cross linking reagent Substances 0.000 claims description 16
- 239000004094 surface-active agent Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 9
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 7
- 230000000379 polymerizing effect Effects 0.000 claims description 4
- 239000002280 amphoteric surfactant Substances 0.000 claims description 3
- 239000003945 anionic surfactant Substances 0.000 claims description 3
- 239000003093 cationic surfactant Substances 0.000 claims description 3
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- 239000012942 water-based acrylic adhesive Substances 0.000 claims 2
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- 210000003491 skin Anatomy 0.000 description 22
- -1 2-ethylhexyl Chemical group 0.000 description 12
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- 230000000052 comparative effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
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- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 210000000434 stratum corneum Anatomy 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001879 gelation Methods 0.000 description 4
- 230000037380 skin damage Effects 0.000 description 4
- NBOCQTNZUPTTEI-UHFFFAOYSA-N 4-[4-(hydrazinesulfonyl)phenoxy]benzenesulfonohydrazide Chemical compound C1=CC(S(=O)(=O)NN)=CC=C1OC1=CC=C(S(=O)(=O)NN)C=C1 NBOCQTNZUPTTEI-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
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- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- FKKAGFLIPSSCHT-UHFFFAOYSA-N 1-dodecoxydodecane;sulfuric acid Chemical compound OS(O)(=O)=O.CCCCCCCCCCCCOCCCCCCCCCCCC FKKAGFLIPSSCHT-UHFFFAOYSA-N 0.000 description 2
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- ICGLPKIVTVWCFT-UHFFFAOYSA-N 4-methylbenzenesulfonohydrazide Chemical compound CC1=CC=C(S(=O)(=O)NN)C=C1 ICGLPKIVTVWCFT-UHFFFAOYSA-N 0.000 description 2
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 2
- 206010013647 Drowning Diseases 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
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- 229940088990 ammonium stearate Drugs 0.000 description 2
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- 238000001739 density measurement Methods 0.000 description 2
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 description 2
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- YWFWDNVOPHGWMX-UHFFFAOYSA-N n,n-dimethyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(C)C YWFWDNVOPHGWMX-UHFFFAOYSA-N 0.000 description 2
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- 229940049964 oleate Drugs 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
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- 239000010452 phosphate Substances 0.000 description 2
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- 229940057950 sodium laureth sulfate Drugs 0.000 description 2
- 229940067741 sodium octyl sulfate Drugs 0.000 description 2
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- FWWNGLGSNATYRZ-UHFFFAOYSA-N diazanium;nonoxybenzene;sulfate Chemical compound [NH4+].[NH4+].[O-]S([O-])(=O)=O.CCCCCCCCCOC1=CC=CC=C1 FWWNGLGSNATYRZ-UHFFFAOYSA-N 0.000 description 1
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- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 239000011787 zinc oxide Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Images
Classifications
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- 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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
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- A—HUMAN NECESSITIES
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- A61F13/02—Adhesive bandages or dressings
- A61F13/0246—Adhesive bandages or dressings characterised by the skin-adhering layer
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
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- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/425—Porous materials, e.g. foams or sponges
-
- 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
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- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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Abstract
Description
通常、粘着テープは基材シート上に粘着剤を塗布して形成することができ、粘着剤そのものは透湿性が非常に低いため、長期間皮膚に貼り付ける場合、皮膚から発生する水分等が排出されず、そのため、水分により皮膚の角質層が水和して爛れまたは浸軟(maceration)等が発生する。
本発明の他の実現例において、前記アクリル系粘着シートを含む医療用粘着テープを提供する。
また、本発明が解決しようとする技術的課題は以上に言及した課題に制限されず、言及していないまた他の課題は下記の記載によって通常の技術者に明らかに理解できるものである。
前記アクリル系粘着シートの厚さは約10μm〜約100μmであってもよい。
アクリル系粘着シートは、水性アクリル系粘着組成物が発泡及び熱硬化を行って前記多孔性構造に形成されてもよい。
前記水性アクリル系粘着組成物は別途の架橋剤をさらに含むか、または含まなくてもよい。
前記水性アクリル系粘着組成物は、界面活性剤を約1重量%〜約10重量%で含んでもよい。
前記アクリル系樹脂は2種以上のアクリル系モノマーを含む共重合性モノマー成分が重合して形成され、前記アクリル系樹脂を形成する全体共重合性モノマー中のアクリル酸の含量は約0.7重量%〜約2重量%であってもよい。
前記水性アクリル系粘着組成物の粘度は、約25℃で約1,000cp〜約10,000cpであってもよい。
本発明のまた他の実現例において、離型フィルム上に水性アクリル系粘着組成物を塗布するステップ、塗布された水性アクリル系粘着組成物に対して順次第1温度(T1)、第2温度(T2)、第3温度(T3)及び第4温度(T4)で発泡及び熱硬化を行って前記離型フィルム上にアクリル系粘着シートを形成するステップ、及び前記アクリル系粘着シートの一面上に基材を貼り付けるステップを含み、前記第1温度〜前記第4温度は、第1温度(T1)<第3温度(T3)<第2温度(T2)、及び第3温度(T3)≧第4温度(T4)の関係を満たす医療用粘着テープの製造方法を提供する。
前記第2温度は約150℃〜約200℃に形成してもよい。
前記第3温度は約90℃〜約120℃に形成してもよい。
前記第4温度は約30℃〜約120℃に形成してもよい。
前記第1温度、前記第2温度、前記第3温度及び前記第4温度の各々で発泡及び熱硬化を約0.5分間〜約3分間行ってもよい。
図面において複数の層及び領域を明確に表現するために厚さを拡大して示した。また、図面において、説明の便宜上、一部の層及び領域の厚さを誇張して示した。
前記共重合性モノマー成分は、例えば、アルキル基含有(メタ)アクリレート、ヒドロキシ基含有(メタ)アクリレート、カルボキシル基含有(メタ)アクリレート及びこれらの組み合わせからなる群より選択された少なくとも一つを含むことができる。
前記アクリル系樹脂を形成する全体共重合性モノマー中の前記アクリル酸の含量は、例えば、約0.7重量%〜約2重量%であってもよい。前記範囲内の含量でアクリル酸を含むことにより、前記水性アクリル系粘着組成物の粘度が適切に調節され、優れた基材密着性及び優れた剥離力を同時に実現することができる。
前記アクリル系樹脂を形成する全体共重合性モノマー中の前記メチルメタクリレートの含量は、例えば、約0重量%超過〜約10重量%であってもよい。前記メチルメタクリレートは、アルファ炭素にメチル基が結合された構造により発泡できる発泡空間がより広いため、前記範囲内の含量で含むことによって発泡空間が十分に確保されるので、前記アクリル系粘着シートは十分に高い透湿性及び適切な気孔率を有する多孔性構造に容易に形成されることができる。
前記水性アクリル系粘着組成物は別途の架橋剤をさらに含むか、または含まなくてもよい。
図1は、前記医療用粘着テープ100の断面図を概略的に示す。前記医療用粘着テープ100は、基材120、及び前記基材120の一面上に積層された前記アクリル系粘着シート110を含む。
前記製造方法は、離型フィルム上に水性アクリル系粘着組成物を塗布するステップ(S1)、塗布された水性アクリル系粘着組成物に対して順次第1温度(T1)、第2温度(T2)、第3温度(T3)及び第4温度(T4)で発泡及び熱硬化を行って前記離型フィルム上にアクリル系粘着シートを形成するステップ(S2)、及び前記アクリル系粘着シートの一面上に基材を貼り付けるステップ(S3)を含み、前記第1温度〜前記第4温度は、第1温度(T1)<第3温度(T3)<第2温度(T2)、及び第3温度(T3)≧第4温度(T4)の関係を満たす。
このように、前記製造方法は、前記発泡及び熱硬化を行う間、温度条件を所定の時間間隔ごとに適切に調節して行うことによって、前記製造方法により製造された医療用粘着テープに含まれたアクリル系粘着シートは、高温の工程を適用する時間が適切に減少して前記アクリル系樹脂の損傷を効果的に防止し、且つ、発泡及び熱硬化反応が十分に進行するという利点がある。
前記製造方法において、離型フィルム上に水性アクリル系粘着組成物を塗布することができる。前記離型フィルムは、例えば、熱可塑性プラスチックフィルムであってもよく、例えば、ポリエチレンテレフタレート(Polyethylene Terephthalate、PET)フィルムであってもよいが、これに制限されるものではない。
以下、本発明の具体的な実施例を提示する。但し、下記に記載された実施例は本発明を具体的に例示または説明するためのものに過ぎず、これにより本発明が制限されるものではない。
アクリル酸(Acrylic Acid(AA))0.7重量%、メチルメタクリレート(Methyl Methacrylate(MMA))3重量%、エチルヘキシルアクリレート(Ethylhexyl Acrylate(EHA))13重量%、エチルアクリレート(Ethyl Acrylate(EA))12重量%及びブチルアクリレート(Butyl Acrylate(BA))30重量%を含む共重合性モノマー成分を重合させ、重量平均分子量10,000,000g/molのアクリル系樹脂を形成した。
前記第1温度は80℃、前記第2温度は156℃、前記第3温度は100℃、前記第4温度は60℃であり、前記各温度で発泡及び熱硬化を3分間行った。
その次、前記アクリル系粘着シートの一面に紙材質の基材を貼り付けて医療用粘着テープを製造した。
実施例1と同様の条件及び方法により水性アクリル系粘着組成物を準備した。
その次、75μm厚さのPET材質の離型フィルム上に前記水性アクリル系粘着組成物を130μm厚さで塗布し、発泡及び熱硬化を行い、前記発泡及び熱硬化を行う間、温度を一定に維持し、180℃で6分間行って、前記離型フィルム上に75μm厚さのアクリル系粘着シートを製造した。
その次、前記アクリル系粘着シートの一面に紙材質の基材を貼り付けて医療用粘着テープを製造した。
実施例1と同様の条件及び方法により水性アクリル系粘着組成物を準備した。
その次、75μm厚さのPET材質の離型フィルム上に前記水性アクリル系粘着組成物を130μm厚さで塗布し、発泡及び熱硬化を行い、前記発泡及び熱硬化を行う間、温度を一度下げ、順次第1温度、及び第2温度で行って、前記離型フィルム上に75μm厚さのアクリル系粘着シートを製造した。
前記第1温度は120℃、前記第2温度は180℃であり、前記各温度で発泡及び熱硬化を6分間行った。
その次、前記アクリル系粘着シートの一面に紙材質の基材を貼り付けて医療用粘着テープを製造した。
前記実施例1、及び前記比較例1、2による医療用粘着テープに含まれたアクリル系粘着シートの物性を評価し、下記の表1に示す。
(透湿度)
測定方法:ASTM E 96の条件に従ってwater methodによって測定した。
具体的には、各々のアクリル系粘着シートを切って46mm直径を有する円形のサンプルを準備し、前記各サンプルを恒温恒湿チャンバーに入れる前の重さである初期重さを測定し、その次に恒温恒湿チャンバーで40℃及び20RH%の条件下で24時間放置した後の重さである後期重さを測定して、下記式2により透湿度を計算した。
[式2]
透湿度(g/m2・24h)=(初期重さ−後期重さ)/面積
測定方法:各々のアクリル系粘着シートを切って5cm×5cm×50μm大きさのサンプルを準備し、前記サンプルの体積を計算し、質量を測定した後、前記質量を前記体積で分けて各々の密度を計算した。
測定方法:前述した密度測定方法と同様の方法により前記各アクリル系粘着シートの質量及び体積を測定して、発泡されたアクリル系粘着シートの密度(d2)を計算した。
また、実施例1に対して窒素気体を注入しないことを除いては同一成分を含むアクリル系粘着組成物を光硬化させ、非発泡のアクリル系粘着シートを製造した。また、比較例1に対して発泡剤を混合しないことを除いては同一成分を含むアクリル系粘着組成物を光硬化させ、非発泡のアクリル系粘着シートを製造し、また、発泡剤を混合しないことを除いては比較例2と同一成分を含むアクリル系粘着組成物を熱硬化させ、非発泡のアクリル系粘着シートを製造した。
このように、計算された発泡されたアクリル系粘着シートの密度(d2)及び非発泡のアクリル系粘着シートの密度(d1)を下記計算式1に代入して気孔率を計算した。
[計算式1]
気孔率(%)=(d1−d2)/d2×100
110・・・アクリル系粘着シート
120・・・基材
Claims (20)
- 複数の気孔を含む多孔性構造からなり、24℃及び25%RHの条件で透湿度(Water vapor transmission rate)が2,000g/m2・24h〜3,500g/m2・24hであり、気孔率が10%〜60%であるアクリル系粘着シート。
- 前記気孔の平均大きさは500nm〜100μmである、請求項1に記載のアクリル系粘着シート。
- 厚さが10μm〜100μmである、請求項1に記載のアクリル系粘着シート。
- 水性アクリル系粘着組成物が発泡及び熱硬化を進行して前記多孔性構造に形成される、請求項1に記載のアクリル系粘着シート。
- 前記水性アクリル系粘着組成物は、アクリル系樹脂、界面活性剤、熱発泡剤、水、その他の添加剤及びこれらの組み合わせからなる群より選択された少なくとも一つを含む、請求項4に記載のアクリル系粘着シート。
- 前記水性アクリル系粘着組成物は別途の架橋剤をさらに含むか、または含まない、請求項5に記載のアクリル系粘着シート。
- 前記水性アクリル系粘着組成物は、アクリル系樹脂を40重量%〜70重量%で含む、請求項4に記載のアクリル系粘着シート。
- 前記水性アクリル系粘着組成物は、界面活性剤を1重量%〜10重量%で含む、請求項4に記載のアクリル系粘着シート。
- 前記界面活性剤は、カチオン性界面活性剤、アニオン性界面活性剤、両性界面活性剤、非イオン性界面活性剤及びこれらの組み合わせからなる群より選択された少なくとも一つを含む、請求項8に記載のアクリル系粘着シート。
- 前記アクリル系樹脂は2種以上のアクリル系モノマーを含む共重合性モノマー成分が重合して形成され、
前記アクリル系樹脂を形成する全体共重合性モノマー中のアクリル酸の含量は0.7重量%〜2重量%である、請求項6に記載のアクリル系粘着シート。 - 前記アクリル系樹脂を形成する全体共重合性モノマー中のメチルメタクリレートの含量は0重量%超過〜10重量%である、請求項10に記載のアクリル系粘着シート。
- 前記水性アクリル系粘着組成物の粘度は、25℃で1,000cp〜10,000cpである、請求項4に記載のアクリル系粘着シート。
- 請求項1〜12のいずれか1項に記載のアクリル系粘着シートを含む医療用粘着テープ。
- 離型フィルム上に水性アクリル系粘着組成物を塗布するステップ、
塗布された水性アクリル系粘着組成物に対して順次第1温度(T1)、第2温度(T2)、第3温度(T3)及び第4温度(T4)で発泡及び熱硬化を行って前記離型フィルム上にアクリル系粘着シートを形成するステップ、及び
前記アクリル系粘着シートの一面上に基材を貼り付けるステップを含み、
前記第1温度〜前記第4温度は、第1温度(T1)<第3温度(T3)<第2温度(T2)、及び第3温度(T3)≧ 第4温度(T4)の関係を満たす医療用粘着テープの製造方法。 - 前記第1温度は0℃〜80℃に形成する、請求項14に記載の医療用粘着テープの製造方法。
- 前記第2温度は150℃〜200℃に形成する、請求項14に記載の医療用粘着テープの製造方法。
- 前記第3温度は90℃〜120℃に形成する、請求項14に記載の医療用粘着テープの製造方法。
- 前記第4温度は30℃〜120℃に形成する、請求項14に記載の医療用粘着テープの製造方法。
- 前記第1温度、前記第2温度、前記第3温度及び前記第4温度の各々で発泡及び熱硬化を0.5分間〜3分間行う、請求項14に記載の医療用粘着テープの製造方法。
- アクリル系樹脂、界面活性剤、熱発泡剤、水、その他の添加剤及びこれらの組み合わせからなる群より選択された少なくとも2種以上を混合して水性アクリル系粘着組成物を形成するステップをさらに含み、
前記水性アクリル系粘着組成物に別途の架橋剤をさらに混合するか、または混合しない、請求項14に記載の医療用粘着テープの製造方法。
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