JP6157578B2 - 研磨用構造体及びその製造方法 - Google Patents
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Description
伸張性基材として、波状の表面を有するスポンジ基材(3M社製)を選択し、転写テープとしてアクリル系延着剤からなる層を備える転写テープ(3M社製、468MP)を選択し、スポンジ基材に転写テープをラミネートして、スポンジ基材に樹脂層(アクリル系粘着剤からなる層)を転写した。
離型処理を施したポリエステルフィルム(ピューレックスフィルム A54−50μm、帝人デュポンフィルム社製)の上に、ナイフコーターを使用して表1に記載の組成の硬化性樹脂組成物を塗布して、塗布層を形成した。塗布量は、173g/m2とした。この塗布層に、スポンジ基材としてのウレタンフォームシート(厚さ6mm、アキレス社製、質量320g/m2)をラミネートして、ポリエステルフィルム側から紫外線照射を行った。これにより、ウレタンフォームシートと硬化性樹脂組成物の硬化物とが結合し、一体として扱えるようになった。次いで、70℃で36時間加熱して、硬化性樹脂組成物をさらに硬化させ、樹脂層を形成した。
表4に記載の組成の研磨材塗布液を調製し、ナイフコーターによりポリプロピレン製の鋳型フィルム上に塗布し、溶剤を乾燥除去した、紫外線硬化を行って、鋳型フィルムの凹部に研磨材組成物を充填した。次いで、表5に記載の組成の硬化性樹脂組成物を調製し、研磨材組成物が充填された鋳型フィルム上に塗布して、塗布層を形成した。硬化性樹脂組成物の塗布量は、約210g/m2とした。
Claims (4)
- 伸張性基材と、砥粒及びその結合剤を含む立体要素と、前記伸張性基材及び前記立体要素を接合する樹脂層と、を備え、前記伸張性基材が、前記樹脂層側の面に空隙部を有しており、前記空隙部が、前記樹脂層を構成する樹脂で充填されている、研磨用構造体を製造する方法であって、
支持フィルム上に塗布された硬化性の樹脂組成物に、前記伸張性基材をラミネートすることにより、前記空隙部を充填しつつ、前記伸張性基材の一面上に前記樹脂組成物を塗布する塗布工程と、
前記塗布工程で塗布された前記樹脂組成物を、前記支持フィルム側からの光照射により硬化して、該樹脂組成物の硬化物からなる樹脂層を形成する樹脂層形成工程と、
複数配置された凹部を有する鋳型に、砥粒及び硬化性樹脂を含む研磨材組成物を充填する充填工程と、
前記鋳型に充填された前記研磨材組成物を、前記支持フィルムを剥離した前記樹脂層に接着させる接着工程と、
前記研磨材組成物を硬化して、前記樹脂層上に前記砥粒を含む立体要素を形成する硬化工程と、
を備える、研磨用構造体の製造方法。 - 前記樹脂層は、ウレタン結合を有するアクリル樹脂を含有する、請求項1に記載の製造方法。
- 伸張性基材と、砥粒及びその結合剤を含む複数の立体要素と、前記伸張性基材と複数の前記立体要素とを接合する樹脂層と、を備え、前記伸張性基材が、前記樹脂層側の面に空隙部を有しており、前記空隙部が、前記樹脂層を構成する樹脂で充填されている、研磨用構造体を製造する方法であって、
複数配置された凹部を有する鋳型に、砥粒及び硬化性樹脂を含む研磨材組成物を充填する第一充填工程と、
前記研磨材組成物が充填された前記鋳型に、ヒドロキシル基を有するアクリルモノマーと、ウレタンプレポリマーと、重合開始剤と、を含有する樹脂組成物をさらに充填する第二充填工程と、
前記鋳型に充填された樹脂組成物を、前記伸張性基材の一面上に接着させるとともに、前記伸張性基材の前記空隙部に前記樹脂組成物を充填する接着工程と、
前記樹脂組成物及び前記研磨材組成物を硬化して、前記伸張性基材の一面上に、前記樹脂組成物の硬化物からなる樹脂層及び前記砥粒を含む立体要素を形成する硬化工程と、
を備える、研磨用構造体の製造方法。 - 前記伸張性基材が、スポンジ基材である、請求項3に記載の製造方法。
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