Title:
METHOD OF ASSESSING WEATHER RESISTANCE OF POLYMER MATERIAL
Document Type and Number:
WIPO Patent Application WO/2014/174664
Kind Code:
A1
Abstract:
Provided is a method of assessing the weather resistance of a polymer material, with which the irradiation wavelength dependence of a property decline in a polymer material can be rapidly and easily acquired at finer wavelength intervals. The present invention also enables high-accuracy determination of the acceleration factor in an accelerated weathering test. Light coming from a light source that has irradiation energy in the ultraviolet range is dispersed and a material surface is continuously irradiated therewith; a phenomenon of degradation in the irradiated material surface is analyzed in the dispersed wavelength direction and the relationship between the phenomenon of degradation and the irradiation wavelength is found; and the relationship between the phenomenon of degradation and the irradiation wavelength is corrected with consideration given to a spectral irradiation property of the light source, and the irradiation wavelength dependence of the phenomenon of degradation of the material is thereby found. The effective energy for the material as regards respective light sources in an outdoor exposure test and an accelerated weathering test is found on the basis of the irradiation wavelength dependence of the phenomenon of degradation of the material and on the basis of the wavelength property of the light source, and the acceleration factor in the accelerated weathering test is determined on the basis of the ratio of effective energy per unit time.
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Inventors:
UEKI YOSUKE (JP)
Application Number:
PCT/JP2013/062380
Publication Date:
October 30, 2014
Filing Date:
April 26, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01N17/00
Foreign References:
| JPS6438631A | 1989-02-08 | |||
| JPS63157647U | 1988-10-17 | |||
| JP2004286707A | 2004-10-14 |
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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