By R Chapman
One of many quickest becoming and most enjoyable sectors of the textiles marketplace, nonwovens supply a huge spectrum of finish makes use of, starting from clinical items to inside textiles. This ebook makes a speciality of the diversity of technical nonwoven functions on hand. half one examines the fundamental rules of nonwoven materials, and contains issues equivalent to the formation of nonwovens and the impact of fibre and upholstery homes on nonwoven functionality. half presents worthwhile examples of ways nonwoven fabrics can be utilized in a number of fabric items for attire, filtration, and private hygiene. With its choice of foreign participants, this book provides a huge reference for pros and lecturers thinking about the construction, know-how, and use of nonwoven fabrics, extending from the scientific fabric to the attire zone.
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Additional info for Applications of Nonwovens in Technical Textiles (Woodhead Publishing Series in Textiles)
13 Slow and steady increase of pressure drop by DOP loading on meltblown electrets. 17 For some nonwovens, such as needle-punched and hydroentangled, there are fibers in the z-direction that act as the bonding strength. 57, because the assumptions for micro-mechanical fibrous theory, as described in the next paragraph, hold true for the above two nonwovens. 57] where: C11 is the stiffness constant in the x-direction on the plane perpendicular to the xaxis C12 is the stiffness constant in the y-direction on the plane perpendicular to the xaxis, etc.
3) is shown below. 63%, the calculated ACCP is 278 µm using Eq. 39. e. particles are blocked when the pore size is smaller than the particle size. The nominal rating of a liquid filter refers to the percentage of particles above a particular size that are captured. For example, a typical pre-filter for drinking water will have a nominal rating of 95% for 5 µm particles. In this case, the ACCP is designed to be 5 µm using Eq. 39. © Woodhead Publishing Limited, 2010 32 Applications of nonwovens in technical textiles Hydrohead is the hydrostatic pressure needed to force a liquid to penetrate a medium and is the ability of a nonwoven fabric to resist liquid penetration.
This is a thermal insulating material made by injecting coarse staple fibers, usually poly(ethylene terephthalate) PET with a diameter of 15 µm or larger, into the meltblowing PP fiber stream between the die and the collector to make a more porous, thicker, and more highly resilient meltblown composite, such that the thermal insulating property of the composite is improved and the web porosity integrity is maintained. 4 which includes both carded and meltblown mats). 025 (W/m K). 4 gives a comparison of theoretical and measured values of R for fiberinjected meltblown mats and carded webs.