EVALUATING METHOD OF ULTRAVIOLET LIGHT RESISTANT PERFORMANCE OF SAME KIND OF RESIN LAMINATED MATERIAL

• Main Authors: TANIGAKI KEIZO, MIYAZAKI YOSHIJI, HIURA SHINICHI
• Format: Patent
• Language: English
• Published: 29.05.1998
• Edition: 6
• Subjects: COLORIMETRY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; RADIATION PYROMETRY; TESTING

PROBLEM TO BE SOLVED: To enable the evaluation of ultraviolet light-resistant performance without the need for the measurement of thickness by obtaining a transmission attenuation index by irradiating a laminated material which comprises a resin base material and a protective layer formed by adding an ultraviolet absorbing agent to the same kind of resin with ultraviolet light with a predetermined wavelength. SOLUTION: An object to be measured 2 comprises a resin base material 2a and a protective layer 2b formed by adding an ultraviolet absorbing agent to the same kind of a resin and is made up of a resin transparent to ultraviolet light. At the time of evaluation, the resin making up a laminated material is irradiated with harmful ultraviolet rays of a predetermined wavelength from the side of the protective layer 2b, the amount of transmission is measured by a sensor 3 to obtain its transmission attenuation index and the amount of ultraviolet light is quantified by a processing device 4. Here the resin without containing an ultraviolet absorbing agent hardly absorbs ultraviolet light, and the attenuation of ultraviolet light occur almost all over the protective layer 2b. Therefore, by the transmission attenuation index over the whole laminated material, the performance of the protective layer 2b on which performance in use is dependent is evaluated. By this, it is possible to evaluate the performance of the protective layer of the same kind of resin laminated material which is usually fused to be integrated and difficult to separate without the need for the measurement of thickness.