By Subhash K. Batra, Ph.D., and Behnam Pourdeyhimi, Ph.D
· presents a unified and in-depth remedy of uncooked fabrics, net formation, bonding and melt-extrusion applied sciences · contains historical past info on warmth, warmth move and polymer physics · Covers applied sciences which are proprietary, new or no longer widely recognized · Introduces the concept that of integrative applied sciences to provide multi-functional items · Explains uncooked fabric houses and technique parameter interactions · Designed as a textbook e-book with difficulties and workouts
The processing of nonwovens is dependent upon a variety of applied sciences, a few tailored from the fabric and paper industries, others built uniquely for nonwovens creation. the current quantity presents a scientific step by step rationalization of almost all methods that combine appropriate uncooked fabrics into comprehensive nonwovens for various finish makes use of. In finished phrases, the e-book explains the relationship among the constitution of nonwovens and the really expert, in addition to nonetheless evolving, applied sciences used to provide them from basic roll items to nanoscale webs and fiberwebs. The unified remedy within the ebook is intended to serve the wishes of engineering and expertise scholars. for college kids and teachers, the textual content additionally deals studies of simple chemistry, polymer physics and warmth move thoughts, that are associated with processing and layout info. difficulties and workouts are provided for lecture room learn and person perform. The e-book is additionally used profitably as a self-teaching device via execs operating in or new to the nonwovens undefined. From the Foreword through John Hearle "In comparability with different guides, the current e-book covers the nice variety of nonwovens and emphasizes how new different types of nonwovens will be created by using novel fibres. This method integrates many features of fibres and cloth buildings that aren't linked to the normal kinds of nonwovens, which have been tested over the past fifty years. during this feel the booklet summarizes present technical wisdom and indicates methods of going past it."
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Extra resources for Introduction to nonwovens technology
A drop of fluid in this case will spread equally in all directions; the spread will look like a circle. Thus the spread of a liquid on a thin fabric is likely to reflect the influence of its ODF. Next, note that the orientation distribution of the fibers influences the pore shapes in the fabric. The shapes will be three-, four-, five-, six-sided polygons, or n-gons. The distribution of these shapes is influenced by the ODF of the fabric. The diameter of the fibers and the areal density of the web will influence the size of the pores: the higher the areal density, the more the number of fibers, the smaller the size of the n-gons.
For example, integrated processes, discussed in Chapters 12 and 13, start with polymer resin as the raw material. Prior to use, the resin needs drying, “crystallizing,” followed by melt extrusion into filaments and their attenuation. 2. Web Formation—This refers to the process or methodology that disperses the fibers or filaments to form a sheet/web. 3. Bonding—The bonding function gives final integrity to the web, which in most cases is called a fabric. 4. Finishing—If the bonded web is not in a final form directly convertable into end products, it may require additional processing steps to enhance its aesthetics, its physical and/or mechanical properties, or to impart to it additional functional properties.
The plot could be on appropriate graph paper or generated by some spread sheet software. Which plot is likely to give you a plausible pattern of a drop of liquid spreading on the fabric? Step i Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 0 5 3 4 6 6 1 2 3 6 8 7 5 9 7 9 6 2 3 8 8 7 5 7 4 7 9 5 9 5 5 7 5 9 9 5 6 5 5 4 4 9 7 5 6 9 4 5 8 6 3 7 2 8 9 5 4 5 4 9 10 6 5 2 6 2 11 8 6 6 4 8 12 6 7 2 3 8 13 5 9 4 6 5 14 8 6 4 6 8 15 8 6 6 4 8 16 8 7 5 7 7 17 6 9 9 7 2 18 3 5 7 8 6 19 5 5 6 3 6 Note: Instructors are encouraged to make up their own problems to illustrate the nuances of the 2-D web structures defined by their ODF, both symmetric and non-symmetric.
Introduction to nonwovens technology by Subhash K. Batra, Ph.D., and Behnam Pourdeyhimi, Ph.D