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US 6,551,407 B2Granted
Method for treatment of surfaces to remove mold release agents with continuous ultraviolet cleaning light
AssigneeBoard of Trustees of Michigan State University
InventorsLawrence T. Drzal, Michael J. Rich, Laura M. Fisher
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Abstract
A method using irradiation of surfaces 12A of substrates (12) with ultra violet light to remove a parting agent is described. The light can be pulsed or continuous. The treated surfaces are more paintable and bondable. The treated molds prevent the introduction of surface inhomogeneities caused by the parting agent.
Claims14
A method for removing a mold release agent from a surface which comprises:
- exposing the entire surface coated with the mold release agent to continuous ultraviolet light having a wavelength between 180 and 500 nm without higher wavelengths and strong emissions at 254.5 and 185 nm to thereby chemically bond break and volatilize the mold release agent for removal without damaging the surface wherein said continuous ultraviolet light is exposed for between about 0.1 to 5 minutes.
Dependencies are inferred from the claim text.