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Cui H.-L.,Beijing Institute of Technology | Cui H.-L.,Beijing Huadunxuehua Plastics Corporation Co. | Wang Z.-H.,Guangdong Huanan Fine Chemical Research Institute | Jiao H.-W.,Beijing Huadunxuehua Plastics Corporation Co. | And 2 more authors.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2011

EVOH, PE and EVA films were prepared by extrusive blowing techniques, the optic capability, transmittance, haze, infrared anti-transmittance 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.


Cui H.-L.,Beijing Institute of Technology | Cui H.-L.,Beijing Huadunxuehua Plastics Corporation Co. | Xu W.-G.,Beijing Institute of Technology | He F.-Q.,Beijing Huadunxuehua Plastics Corporation Co. | And 3 more authors.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2012

Polyvinyl alcohol (PVA), polyethylene (PE) and ethylene-vinyl acetate copolymer (EVA) film was prepared. The optic capability, infrared transmittance and heat preservation capability of the films were studied respectively. The result indicated that the haze degree of the PVA film decreased about 15% and 12% than PE film and EVA film; PVA film transmittance of IR was more or less than other films in the 7~14 μm wavelength range so that the temperature of greenhouse could be increased effectively in daylight. It was just 16.2% about 20% less than EVA film, and 50% less than PE film. The PVA film could be used as agricultural film in greenhouse to promote heat preservation performance greatly.

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