Specifications: 1.High barrier qualities 2.Possibility of adjusting surface density 3.Possibility of adjusting air permeability intensity Melt blowing (MB) is a process for producing fibrous webs or articles directly from polymers or resins using high-velocity air or another appropriate force to attenuate the filaments. The MB process is one of the newer and least developed nonwoven processes. This process is unique because it is used almost exclusively to produce microfibers rather than fibers the size of normal textile fibers. MB microfibers generally have diameters in the range of 2 to 4 µm, although they may be as small as 0.1 µm and as large as 10 to 15 µm. Differences between MB nonwoven fabrics and other nonwoven fabrics, such as degree of softness, cover or opacity, and porosity can generally be traced to differences in filament size. APPLICATIONS The melt-blown system is unique because the process generates a fine fiber not available to the other nonwoven processes. Micro-denier fiber (less than 0.1 denier per filament) is not really available as a nonwoven fibrous raw material. Hence, the melt-blown process, which can produce such a fiber, opens new vistas of products and applications. At the present time, the following market segments are successfully served by melt-blown products: i) Filtration media This market segment continues to be the largest single application. The best known application is the surgical face mask filter media. The applications include both liquid filtration and gaseous filtration. Some of them are found in cartridge filters, clean room filters and others. ii) Medical fabrics The second largest MB market is in medical/surgical applications. The major segments are disposable gown and drape market and sterilization wrap segment. Surgical drapes and gown Sterilization wrap ii) Sanitary products MB products are used in three types of sanitary protection products - feminine sanitary napkin, Spunbond-MB diaper top sheet, and disposable adult incontinence absorbent products. iv) Oil adsorbents MB materials in variety of physical forms are designed to pick up oily materials. The best known application is the use of sorbents to pick up oil from the surface of water, such as encountered in an accidental oil spill and for mats in machine shops and in industrial plants. v) Apparel The apparel applications of melt-blown products fall into three market segments: thermal insulation, disposable industrial apparel and substrate for synthetic leather. The thermal insulation applications takes advantage of microvoids in the structure filled with quiescent air, resulting in excellent thermal insulation. vi) Hot-melt adhesives The MB process has a special feature: it can handle almost any type of thermoplastic material. Thus, the task of formulating a hot-melt adhesive to provide specific properties can be greatly simplified by using the melt blown system to form the final uniform adhesive web. vii) Electronic specialties Two major applications exist in the electronics specialties market for melt blown webs. One is as the liner fabric in computer floppy disks and the other as battery separators and as insulation in capacitors. viii) Miscellaneous applications Interesting applications in this segment are manufacture of tents and elastomeric nonwoven fabrics which have the same appearance as continuous filament spunbonded products. Meltblown nonwovens