There are provided a light polarizing film of a grid type, usable for
light at a wavelength in a range of a visible light region to an infrared
region, and a method of continuously fabricating the same. A PET film 12
was fed via rolls 13, and a mixed liquid containing poly (vinyl alcohol),
formaldehyde, ZnO whiskers after metal treatment, and water was applied
to the surface of the PET film to a predetermined thickness with the use
of a T-die 14, subsequently executing coating while applying shearing
stress by varying peripheral velocity of an upper roll 16 of biaxial
rolls from that of a lower roll 16' thereof, whereupon the ZnO whiskers
were oriented in the longitudinal direction of the film. Thereafter, the
film was dried and cured through a constant temperature cell 17 kept at a
predetermined temperature, and rolls 18 to be subsequently taken up by a
take-up roll 19. The light polarizing film obtained was found very high
in polarized light reflection property in an infrared region of a
wavelength in a range of 1 to 10 .mu.m, and upon measurement of
reflectance for two sheets of the light polarizing films crossed at right
angles, infrared light reflectance thereof was found at 99%.