초록 ▼

A method of forming a meltblown web having meltblown fibers and particles is provided. The particles are heated to a temperature approximating that of the meltblown fibers as they are being extruded. As a portion of any heated particle impacts the skin of one or more solidifying meltblown fibers, th

A method of forming a meltblown web having meltblown fibers and particles is provided. The particles are heated to a temperature approximating that of the meltblown fibers as they are being extruded. As a portion of any heated particle impacts the skin of one or more solidifying meltblown fibers, that portion of any heated particle penetrates into one or more solidifying particles. Although a portion of any particle becomes embedded in and retained by one or more meltblown fibers, such surface penetration is generally slight desirably leaving a substantial amount of surface area of any particle available for interaction with any medium to which a web may be exposed.

대표청구항 ▼

1. A method of forming a meltblown web, the method comprising forming at least one layer by the steps of:(a) forming a primary stream of meltblown fibers, having an extrusion temperature at which the meltblown fibers have been extruded; (b) forming a particulate stream comprising particles; (c) heat

1. A method of forming a meltblown web, the method comprising forming at least one layer by the steps of:(a) forming a primary stream of meltblown fibers, having an extrusion temperature at which the meltblown fibers have been extruded; (b) forming a particulate stream comprising particles; (c) heating said particles to a temperature which approximates the extrusion temperature of said meltblown fibers; (d) merging the primary stream and the particulate stream so that the primary stream comprises particle-containing meltblown fibers; (e) impacting the particles of said particulate stream to penetrate into one or more solidifying meltblown fibers to become embedded in and retained by the one or more meltblown fibers; and (f) thereafter directing the primary stream comprising particle-containing meltblown fibers onto a moving forming surface to form a layer comprising the particle-containing meltblown fibers.