| 摘要 |
PROBLEM TO BE SOLVED: To provide a feed block which prevents the occurrence of an unstable phenomenon when a laminated resin film or sheet is molded by coextrusion molding by a feed block method and can correspond to various kinds of resin. SOLUTION: The feed block 15 has an internal space 16. The resin introduced from a plurality of upstream side channels 31, 32, and 33 is combined in a confluence part 35, pass through a downstream side channel 36 flowing in a laminated state, and flow to a flat die 10. In the upstream side channel 32, projections 37 projecting in the thickness direction T are formed, and the thickness direction T is narrowed partially. The fluidity of the resin is changed when the resins flow in the upstream side channels by the projections 37. COPYRIGHT: (C)2009,JPO&INPIT |
