JP5804549B2 - 毛髪の柔軟性評価方法 - Google Patents
毛髪の柔軟性評価方法 Download PDFInfo
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Description
図1は、本発明の実施の形態の毛髪の柔軟性評価方法で使用する荷重測定装置を示している。荷重測定装置は、本発明者等により開発された特許文献1に記載の荷重測定装置であって、毛髪の曲げ試験を実施可能である。
図1に示すように、荷重測定装置10は、支持部材11と梁部材12と荷重部13と変位センサ14とを有している。
試験試料(Sample)として、同一人物の3本の毛髪からそれぞれ5mm程度の3試料(合計9試料)を採取した。シャープペンシルのペン先に硬化性樹脂をポンプ注入した後、毛髪試料を挿入することにより、毛髪試料の一端を固定した。シャープペンシルを固定し、顕微鏡で観察しながら、一端が固定された毛髪試料を36度刻みで回転させて、断面形状を測定した。測定した断面形状を楕円近似し、各毛髪試料の長軸2aと短軸2bとを求めた。その結果を、表1に示す。
11 支持部材
21 XYZステージ
22 ピエゾステージ
23 長さ調整ジグ
24 センサホルダ
12 梁部材
13 荷重部
14 変位センサ
Claims (4)
- 毛髪の断面形状を測定する形状測定ステップと、
前記毛髪の一端を固定し、前記毛髪の固定位置から所定の距離lの位置での、前記断面形状の所定の方向に沿った前記毛髪の荷重Pと変位との関係を測定する試験ステップと、
前記毛髪の変位とPl 3 /3I(Iは荷重Pの負荷方向に対する前記毛髪の断面二次モーメント)との関係から、前記毛髪の柔軟性を評価する評価ステップとを、
有することを特徴とする毛髪の柔軟性評価方法。 - 前記形状測定ステップは、前記断面形状を楕円近似したときの長軸と短軸とを求め、
前記試験ステップは、少なくとも前記長軸および前記短軸のいずれか一方に沿った前記毛髪の荷重と変位との関係を測定することを、
特徴とする請求項1記載の毛髪の柔軟性評価方法。 - 前記毛髪は複数の層から成る断面構造を有し、
前記評価ステップは、横軸を変位、縦軸をPl3/3Iとして測定値をプロットしたときのグラフの傾きSEを求め、前記傾きSEから前記毛髪の各層の弾性率および/または厚みを評価することを、
特徴とする請求項1または2記載の毛髪の柔軟性評価方法。 - 前記形状測定ステップは、非接触で前記毛髪の断面形状を測定し、
前記試験ステップは、前記毛髪の固定位置から1〜3mm離れた位置で、150μN以下の荷重範囲での前記毛髪の荷重と変位との関係を測定することを、
特徴とする請求項1、2または3記載の毛髪の柔軟性評価方法。
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Families Citing this family (3)
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KR102046838B1 (ko) * | 2015-09-30 | 2019-11-21 | (주)아모레퍼시픽 | 형태 유지 압력을 이용한 모발의 탄력성 측정방법 |
CN107976269B (zh) * | 2017-11-20 | 2023-09-22 | 河南工程学院 | 发制品柔顺性测试仪 |
JP7463220B2 (ja) | 2020-07-22 | 2024-04-08 | クラシエ株式会社 | 繊維試料の弾性率の算出方法、繊維試料の弾性率の算出システム、毛髪化粧料の評価方法、毛髪化粧料の製造方法及び毛髪化粧料の決定方法 |
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JP2007020559A (ja) * | 2005-06-14 | 2007-02-01 | Shiseido Co Ltd | Runx1を指標とした毛質評価方法 |
US8887584B2 (en) * | 2009-01-20 | 2014-11-18 | Tohoku University | Load measuring apparatus |
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