| 摘要 |
PROBLEM TO BE SOLVED: To improve an operation efficiency while the characteristics of a film is kept by decomposing/purifying a sublimated substance by leading it to a catalyst with the use of a suction nozzle which leads the sublimated substance generated from a molten material extruded from a die lip and a die for extrusion molding in which the catalyst for decomposing/purifying the sublimated substance. SOLUTION: In a die 1 fitted with a catalyst 7 and a suction nozzle 6, the nozzle 6 is installed below the die 1 and formed to be able to suck from the vicinity of a die lip 2, the catalyst 7 is located at a position to be able to suck through the nozzle 6 and can be attached/detached, air layers are formed in the catalyst 7 and a resin passage in the die, and the influences of heat conduction on a resin is alleviated. The catalyst 7 can decompose the sublimation substance of the thermoplastic resin, as an oxidation catalyst, and a platinum group catalyst such as platinum and palladium is preferable. As a carrier carrying the catalyst 7, a metal honeycomb, a ceramic honeycomb, expanded alumina, spherical alumina, etc., can be named. Preferably, the carrier can be packed directly. |
