Patent ID: 6461133
Filing Date: 2002-10-08
Classification: D01D

Abstract:
A die head assembly for producing meltblown bicomponent fibers in a meltblown apparatus, said assembly comprising:a die tip detachably mountable to an underside of an elongated support member, the support member having a first polymer supply passage and a second polymer supply passage defined therethrough; said die tip having a row of channels defined therethrough terminating at exit orifices along a lower edge of said die tip, said channels receiving and combining first and second polymers conveyed from the support member; an elongated recess defined in a top surface of said die tip, said recess defining an upper chamber of each said die tip channel; an elongated upstream and an elongated downstream breaker plate removably supported in a stacked configuration in said recess, said breaker plates having aligned pairs of adjacent holes defined therethrough such that a pair of said aligned holes is disposed in each said upper chamber; a filter device disposed between said upstream and said downstream breaker plates in said upper chamber; and wherein at each said channel, the first and second polymers conveyed from the support member supply passages flow through respective separate said holes in said upstream breaker plate, flow through said filter device, flow through said aligned holes in said downstream breaker plate, and then flow into and combine in said channels prior to being extruded as bicomponent polymer fibers from said orifices.