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1. US20090108487 - PRODUCING METHOD OF POLYMER FILM

Office United States of America
Application Number 11909712
Application Date 20.03.2006
Publication Number 20090108487
Publication Date 30.04.2009
Publication Kind A1
IPC
B29C 47/04
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
04of multilayered or multicoloured articles
B29C 47/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
Applicants FUJIFILM Corporation
Inventors Suzuki Nobuyoshi
Takeda Ryou
Agents SUGHRUE MION, PLLC
Priority Data 2005088520 25.03.2005 JP
Title
(EN) PRODUCING METHOD OF POLYMER FILM
Abstract
(EN)

A casting film (80) having a base layer and one outer layer on the base layer is formed by a co-casting. Viscosity of an outer layer dope was at most 40 Pa·s. Just after formation of the casting film (80), the drying air is fed out from an outlet (82a) opening to a belt (73). The temperature and the static pressure are respectively predetermined valued 50-160° C. and 50 Pa-200 Pa. The first outlet is partitioned by partitioning members, and meshed plates are attached to the partitions confronting to both side edge portions of the casting film (80). Another drying air is fed out from an outlet (83a) in a running direction of the belt 73. The temperature and the wind speed are respectively predetermined valued 50° C.-160° C. and 5 m/s-20 m/s. The occurrence of unevenness and foaming was reduced and a film excellent in planarity was produced.

Also published as
EP6730003