| 高分子 Vol.69 No.12 |
| >> Japanese | >> English |
特集 美々っとポリマー
|
| 展望 COVER STORY: Highlight Reviews |
| 化粧品への表面処理粉体の活用～高分子にフォーカスして～ Utilization of Surface-Treated Powder in Cosmetics: Focusing on Polymers |
福井 寛 Hiroshi FUKUI |
| ＜要旨＞ 化粧品には汗・皮脂の吸着や肌を彩るため、または紫外線を防御するために多くの種類の粉体が使われている。また、これらの粉体を高分子などで表面を処理して、本来の機能を高め、乳化系の水相や油相に望みのままに分散させて使用感や化粧の持続性を高めている。本報告では化粧品用粉体の表面処理について高分子にフォーカスして報告する。 Keywords: Cosmetics / Polymer / Surface Treatment / Powder / Pigments / Silicone |
| ページトップへ▲ |
| 化粧品の肌感触と保湿力を物性測定により評価する Evaluation of Skin Comfortable Feeling and Moisturizing Capacity by Physical Measurements |
山下 愛・高橋 正人 Ai YAMASHITA, Masato TAKAHASHI |
| ＜要旨＞ 化粧品の肌感触と保湿性は化粧品にとって大変重要な特性である。本稿では、化粧品基剤の開発を目的としてヒアルロン酸、キトサンをさまざまな濃度で含有する水溶液を肌に塗布した際の肌感触に関する官能検査結果とこれらの水溶液のレオロジー特性、肌の角層における保湿力の値との関係について議論する。 Keywords: Basic Understanding of Cosmetics / Skin Comfortable Feeling / Moisturizing Capacity / Sensorial Evaluation / Rheological Properties / Hyaluronic Acid / Chitosan / Glycerin |
| ページトップへ▲ |
| SARS-CoV-2とマスク・化粧品ナノファイバー Nanofibers Using of SARS-CoV-2 Defense Masks and Moisturizing Cosmetics |
山下 義裕 Yoshihiro YAMASHITA |
| ＜要旨＞ SARS-CoV-2によるコロナ禍を乗り越えるためにウイルス感染を低減するためのナノファイバーフィルターを採用したサージカルマスクやマスクと顔の間の隙間をできるだけ減らしたフィッティング性の高い高分子素材によるマスクの開発も進んでいる。エレクトロスピニング法ナノファイバーは肌に保湿性を付与し、その化粧液とスピニング用美容家電の販売が始まった。セルロースナノファイバーは化粧液の粘度や流動性のコントロールに貢献している。 Keywords: Nanofibers / Electrospinning / Surgical Masks / Mask Leakage Rate / PVDF / Cellulose Nanofiber |
| ページトップへ▲ |
| トピックス COVER STORY: Topics and Products |
| 新規油溶性ポリウレタンゲルの開発と化粧品製剤への応用 Development of Novel Oil-Soluble Polyurethane Gel and its Application to Cosmetics |
竹下 卓志 Takashi TAKESHITA |
| ＜要旨＞ People all over the world are increasingly aiming to present an ageless impression that reflects their success in work, private, and social networking activities. One of the most important features that determines the age impression of a person is their laugh lines. As a result, various ways to improve the appearance of laugh lines has been the focus of cosmetic product developments. However, the long-lasting effect of these conventional makeup products is generally not satisfying in the face areas of the laugh lines. In this study, we have addressed the challenge of aggregation collapse by developing a novel powder coating technology that can absorb movements and maintain a uniform coating film. As a surface treatment agent, we focused on a polyurethane gel, which exhibits high elasticity due to hard and soft segments that coexist in the structure. Results show that our polyurethane-treated foundation not only suppresses the makeup collapse of laugh lines when movement is occurring, but it can also maintain a beautiful age impression. Keywords: Cosmetics / Polyurethane / Surface Treated Powder / Elasticity / Laugh Line |
| ページトップへ▲ |
| 化粧品開発へのレオロジーの応用 The Application of Rheology in the Development of Cosmetics |
中川 泰治 Yasuharu NAKAGAWA |
| ＜要旨＞ Establishing manufacturing processes, skin effects, texture and preventing problems with stability are all integral in the development and manufacture of cosmetics. The aim of this study was to evaluate the usefulness of rheological measurements in these areas of cosmetic production. Rheological measurements were applied at various stages during the development and manufacture of a bath milk, a skin care product and a cleansing milk. In the case of the bath milk, we applied mainly flow curves to observe the dispersibility of emulsified particles and to predict its stability. Regarding the skin care product, we investigated the rheological properties of materials on its basic formula to understand their effects on its texture. As for the cleansing milk, we used rheological measurements in order to distinguish the physical properties of formulas with defective textures from those that were acceptable. We then compared the rheological properties of an acceptable formula to those that had been produced by different manufacturing methods. Keywords: Rheology / Stability / Texture / Manufacturing Process / Emulsion |
| ページトップへ▲ |
| 化粧品の摩擦と触感 The Friction and Tactile Feel of Cosmetics |
野々村 美宗 Yoshimune NONOMURA |
| ＜要旨＞ The authors have developed a biomimetic haptic sensing system that mimics the mechanical phenomena that occur on the skin when a human touches an object to show the expression mechanism of various tactile sensations and guidelines for designing various products such as cosmetics. Here, we show an overview of the sensing system and our research on the tactile texture of cosmetic powders. Keywords: Tactile Feel / Friction / Cosmetics |
| ページトップへ▲ |
| D-ES（ダイレクトエレクトロスピニング）技術の開発と化粧品への応用 Development of D-ES Tecnology and Application for Cosmetics |
東城 武彦・内山 雅普 Takehiko TOHJO, Masayuki UCHIYAMA |
| ＜要旨＞ We have developed a D-ES (Direct Electro Spinning) technology and succeeded in forming a second skin-like membrane directly on the skin, consisting of the fine fiber of submicron diameter fibers. The membrane becomes transparent and unites with the skin by combining various cosmetic lotions. And it mimics the skin function that was originally present and behaves as barrier of skin, and as a result, it can realize a higher skin improvemnt effect than conventional cosmetic applications. We have started to apply this technique in the cosmetics category and are going to expand to medical applications in the future. Keywords: Electro-Spinning / D-ES / Fine Fiber / Cosmetics / Second Skin |
| ページトップへ▲ |
| グローイングポリマー Polymer Science and I: A Personal Account |
| お茶部屋 Coffee Room |
江島 広貴 Hirotaka EJIMA |
| ＜要旨＞ Discussion with colleagues in the coffee room helped me to get new ideas. Research became more enjoyable when surrounded by interesting people with various backgrounds. I hope to provide an environment where students can freely discuss their research and nurture original ideas. |
| ページトップへ▲ |
| 高分子科学最近の進歩 Front-Line Polymer Science |
| 高分子を生やした微粒子 Polymer-Grafting from Particles |
大野 工司 Kohji OHNO |
| ＜要旨＞ Significant advances in polymer chemistry have enabled the synthesis of polymer particles with unique structures, the morphology control of polymer chains attached to particle surfaces, and the control of arrangement and distribution of functional groups attached to particle surfaces. These achievements have produced various high-value-added particles. In particular, controlled or living polymerization from initiation sites immobilized on the surface of particles dramatically increased the density of polymer chains that can be grafted. This means that a novel polymeric architecture, the so-called concentrated polymer brush, is successfully grafted on the surface of particles. In the last 20 years, the development of science and technology for “polymer-grafting from particles” has been remarkable. It has handled various particles with the diameter ranging from nano to micrometer, making a great contribution to colloid chemistry. This paper introduces the recent research trends in the synthesis and application of functional particles using surface-initiated graft polymerization. Keywords: Particle / Colloid / Polymer Brush / Living Polymerization / Crystal / Structural Color / Surface / Interface |
| ページトップへ▲ |
| Copyright(C) 2020 The Society of Polymer Science, Japan All Rights Reserved. |