Plastic sheeting for greenhouse and the like

Details Plastic sheeting for greenhouse and the like Plastic sheeting for greenhouse and the like

1987-10-26

1990-01-23

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

47 17, 47 19, 47 29, 47 31, 524431, 524440, C08K 322, C08K 308

Patent

active

048959049

ABSTRACT:
The invention relates to polymer sheets or films for use in greenhouses. The polymer sheets or films contain components which absorb or reflect in the near I.R. (NIR) i.e. in the 0.7 to 2.0.mu. region, and which transmit at least 75 percent in the photosynthesis active radiation (PAR) region, which is essentially the 0.4.mu. to 0.7.mu. region of the solar spectrum. The compositions of the invention contain UV radiation stabilizers. The NIR absorbers and reflectors in the films of the invention are certain specific oxides or metals in a very fine particle size, in the submicron or micron range.

REFERENCES:
patent: 3622537 (1971-11-01), Needham et al.
patent: 3876552 (1975-04-01), Moynihan
patent: 4134875 (1979-01-01), Tapia
patent: 4250078 (1981-02-01), McFarlane et al.
patent: 4310596 (1982-01-01), Buskirk
patent: 4423164 (1983-12-01), Bar
patent: 4424292 (1984-01-01), Ravinovitch et al.
patent: 4559381 (1985-12-01), Tapia et al.
patent: 4560609 (1985-12-01), Fukushima et al.
patent: 4629756 (1986-12-01), Kerbow

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