کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
693842 1460534 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measuring flake orientation for metallic coatings
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Measuring flake orientation for metallic coatings
چکیده انگلیسی

Metallic and pearlescent coatings, very popular in automotive applications, contain flake shaped pigments. The orientation distribution of these flakes inside the effect coatings determines to a large extend the color and visual appearance of the coating. Unfortunately the measurement of flake orientation distributions is far from straightforward. The two main current techniques use analysis with light microscopy on cross cuts, and confocal microscopy.We used both techniques on a large set of samples. A set of 117 metallic coatings were analyzed, where we varied the concentration of metallic pigment, the concentration of so-called disorienting agent and the type and size of metallic pigment. Trends that for a long time have been assumed to be true were now unambiguously proven true, and can now be stated in a quantitative manner. For example, large flakes generally show better orientation than small flakes. For waterborne cornflake pigments, we measured an orientation width of 19.4° for flakes with a median diameter of 16 μm, and only 7.2° for flakes with a median diameter of 35 μm. Surprisingly we found only a small effect on flake orientation when disorienting agent was added to a color formula.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 64, Issues 2–3, February 2009, Pages 287–293
نویسندگان
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