Bfe99 Meltblown Non Woven Cloth

Bfe99 Meltblown Cloth Hospital Hygien Filter Cloth Exported Standard Roll Packing

BFE99 Melt Blown Nonwoven Fabric Hospital Hygien Filter cloth Exported standard

BFE99 Melt-blown Introduction

1. The melt blown process is a unique among nonwoven systems. Fundamentally it is a high tech version of the making of cotton candy at amusement parks.

2. In making cotton candy, sugar is melted and pressure fed through small openings in a rotary spinning wheel. Upon exciting, the molten sugar congeals and is stretched into short fibres by centrifugal forces.

3. In the melt blown system, molten polymers are forced through small slit openings and high temperature (230oC-390oC) air is impinged (300-500 miles/hr) at both sides of the exiting film.

4. The fast-moving air streams effectively stretch or attenuate the molten polymer by multiple orders of magnitude and solidify it into a random array of discontinuous subdenier fibers.

5. The fibers are then condensed (separated from the air stream) as a randomly entangled web and compressed between heated rolls. This paper deals with manufacturing technology, type of polymers used, web characteristics, properties and its various applications.

BFE99 Melt-blown General Description

1. Melt-blown process is a one-step process in which high-velocity air blows a molten thermoplastic resin from an extruder die tip onto a conveyor or take-up screen to form a fine fibrous and self-bonding web.

2. The fibres in the melt blown web are laid together by a combination of entanglement and cohesive sticking. The ability to form a web directly from a molten polymer without controlled stretching gives melt blown technology a distinct cost advantage over other systems.

3. Melt blown webs offer a wide range of product characteristics such as random fibre orientation, low to moderate web strength. About 40% of melt blown material is used in the uncombined (monolithic) state.

4. The remainder of melt blown materials are composites or laminates of melt blown webs with another material or nonwoven. The largest end-uses for monolithic melt blown materials are oilsorbents, air and liquid filtration media.

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