| Résumé : |
The physical properties of UV-cured materials are substantially affected by the lamp systems used to cure them. The development of the intended properties, whether a varnish, an ink, or an adhesive, can depend on how wellthese lamp factors are designed and managed. The four key factors of UV exposure are: UV irradiance (or intensity), spectral distribution (wave-lengths) of UV, time-integrated UV energy (or "dose"), and infrared radiation. Inks and varnishes will exhibit very different response to peak irradiance or energy, as well as to different UV spectra. One of the properties that is the most sensitive to peak irradiance and correct wavelength is depth of cure and resulting adhesion. Depending on the irradiance profile, some of the UV energy is wasted and does not assist in deep cure and adhesion. The ability to match the various lamp characteristics to the optical properties of the curable materials widens the range in which UV curing is a faster, more efficient production process. |
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Effects of uv-curing exposure on adhesion in COATINGS TECH, Vol. 1, N° 4 (04/2004)
