Producing method for film

Details Producing method for film Producing method for film

2011-01-18

2011-01-18

Nguyen, Khanh (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

C264S216000, C264S211190

Reexamination Certificate

active

07871549

ABSTRACT:
A polymer solution (21) is prepared by dissolving poly-.ε.-caprolactone and amphipathic polyacrylamide in an organic solvent. The polymer solution (21) is cast from a casting die (25) onto a casting belt (26) to form a casting film (40). Air (35) from a blowing and suctioning device (34) is sent to the casting film (40) to generate droplets (44). The relative speed of drying air (37) to the moving speed of the casting belt (26) is adjusted at 5 m/min in parallel flow. The water in the drying air (37) is condensed in the casting film (40) to form the droplets (44). The droplets (44) are evaporated after evaporating the organic solvent in the casting film (40), so that a honeycomb-structure film (12) can be obtained.

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Supplemental European Search Report, dated Aug. 25, 2008, issued in counterpart application EP Application No. 05780275.3 (6 pages).

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