Preparation of EVOH film and infrared spectroscopic study of its heat preservation property

EVOH,PE and EVA films were prepared by extrusive blowing techniques,the optic capability,transmittance,haze,infrared antitransmittance and heat preservation of the films were studied by IR spectroscopy and optic block.The result indicated that the haze degree of the EVOH film decreased about 10% and 5% compared to PE film and EVA film respectively,EVOH film's transmission of IR is much less than other films in the 2.5～25 μm wavelength range,it is just 9.03% in 7～14 μm wavelength range,and about 27% less than EVA film,while much less than PE film.It was found that EVOH film has much better capability of infrared anti-transmittance and point-blank light transmission than other two kinds of films.It was good for calefaction and heat preservation of greenhouse.