Download 3-D Fibrous Assemblies: Properties, Applications and by Jack Hu PDF

By Jack Hu

There were very important contemporary advancements within the creation and alertness of 3 dimensional materials. those 3D cloth constructions have nice strength for brand new materials and cloth functions. 3D fibrous assemblies summarises a few key advancements and their functions within the fabric undefined. The booklet starts with an introductory bankruptcy which defines the ideas and kinds of 3D fibrous assemblies. The publication then discusses how 3D materials will be utilized in cloth items. those variety from composites and protecting garments to scientific textiles. the rest of the e-book experiences the 2 major 3D materials; multi-axial warp knitted materials and multi-layer woven materials. topics reminiscent of constitution, manufacture, homes and modelling are thought of for either materials. Written via a uncommon writer, 3D fibrous assemblies should be a pioneering consultant for a wide spectrum of readers, starting from fibre scientists and architects via to these enthusiastic about learn and improvement of latest iteration cloth items.

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Extra info for 3-D Fibrous Assemblies: Properties, Applications and Modelling of Three-Dimensional Textile Structures

Example text

A typical 3-D braided structure is shown in Fig. 16. , 2005). Principle of three-dimensional braiding The 3-D braids are produced by a number of processes including the track and column (3-D circular loom) method (Brown and Ashton, 1989), the two-step braiding method (Popper and McConnell, 1987), and a variety of displacement braiding techniques. The basic braiding motion includes the alternate x and y displacement of yarn carriers followed by a compacting motion. The proper positioning of the carriers and the joining of various rectangular groups through selected carrier movements accomplish shape formation.

The cost-effective solution begins with engineering the laminate requirements at the point of fabric manufacture. Stitchbonding of fabric is essentially an automated process and is highly efficient compared to a shop-fabricated laminate using unidirectional or woven fabrics. Conventional fabrics are made by weaving fibres in two perpendicular directions (warp and weft). Weaving bends the fibres, reducing the maximum strength and stiffness that can be attained. When cut, fabrics also tend to fray, making them difficult to handle.

E. it is an additional process) via a moulding or thermoforming process. Air-laid technologies also exist that utilize air streams to blow or lay fibres on screens or moulds, thus providing a 3-D form during fabric/web formation. Melt blowing has 26 3-D fibrous assemblies similar capabilities. , 2007). Gong et al. (2003) have described a method for producing 3-D nonwovens directly from fibres, thus eliminating the conversion processes required for many applications. The 3-D fibrous web is formed by air-laying and is then consolidated by heat through-air bonding.

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