BREAKER PLATE ASSEMBLY FOR PRODUCING BICOMPONENT FIBERS IN A MELTBLOWN APPARATUS

摘要

A die head assembly (30) for producing meltblown bicomponent fibers in a meltblown apparatus includes a die tip (32) detachably mounted to an underside of (36) a support member (34). The die tip (32) has a row of channels (44) defined therethrough terminating at exit orifices (46) along a bottom edge of the tip. The channels (44) receive a combine first and second polymers conveyed from the support member (34). A recess (48) is defined along the top surface of the die tip (32) and defines an upper chamber for each of the die tip channels (44). A plurality of breaker plates (52, 56) is removably supported in the recess (48) in a stacked configuration. An upper one of the breaker plates (52) has receiving holes (68a, 68b) defined therein to separately receive polymers from supply passages (40, 42) in the support member (34). The remaining breaker plates have holes defined therethrough configured to divide the polymers into separately polymer streams and to direct the polymer streams into the die tip channels (44), the number of polymer streams corresponding to the number of holes in the lowermost breaker plate (56). The polymer streams combine in the channels prior to being extruded from the orifices as bicomponent polymer fibers.