Microdenier filament yams

Microdenier filament yams, 506 microfibre nonwoven, 43-4 electrospun nanofibre nonwoven web, 43... 

Microdenier Fibers. The first commercial production of microfiber in the United States was in 1989 by the DuPont Company. Today microfibers are produced in a variety of synthetic fibers (i.e., polyester, nylon, acrylic, etc.) A microfiber is a fiber that is less than one denier per filament. Yams made from microdenier filaments are able to give silklike hand to fabrics. 

It is one of the features of PLA that it can be produced as both filament and spun yams. Fabrics produced from spun yam have a natural hand and are considered to feel similar to cotton in this respect. Fabrics from filament yams have a cool and soft hand and exhibit a high fluidity or drape with a degree of elasticity. NatureWorks LLC product development suggests, for example, that a 1.2 dpf PLA achieves the sofmess of a microdenier PET (e.g. 0.7 dpf). 

As to the fabric specific surface area, it is defined as the ratio of the lateral surface area of the filaments involved in the weave to the fabric surface area (cmVcm ). The value of this parameter will be greater with microdenier filament yarn than with macrodenier filament yam. 

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