Stitch bonding

Potlnri P, Knsak E, Reddy TY. Novel stitch-bonded sandwich strnctures. Compos Struct 2003 59(2) 251-9. 

Aktas A. Multi needle stitch-bonded sandwich composites for improved damage tolerance. PhD Thesis. School of Materials, University of Manchester, 2011. 

Nonwoven geotextiles. Nonwoven fabrics are defined as a sheet, web, or batt of directionally or randomly oriented fibres/filaments, bonded either by friction, and/or cohesion, and/or adhesion. In general, nonwoven fabric formation can be considered as a two-step process web formation (aligning the fibres with certain orientation characteristics) and bonding these fibres by mechanical, thermal, or chemical means. This two-step process has formed the classification of nonwoven structures, i.e. carded, airlaid, spunlaid, meltblown, needlepunched, hydroentangled, adhesive bonded, thermal bonded, stitch bonded, etc. Some of the important processes that are used for the manufacture of nonwoven geotextiles are discussed below. 

Stitch bonding can be used to hold together an assembled warp or weft UD fabric. To confer adequate stability, a mat or tissue is usually placed on the fabric prior to stitching. 

Figure 21.32 Malimo stitch bonding process. Source Reprinted with permission from Horsting K, Wulhiirst B, Franzke G, Offerman P, SAMPE J, 29(1), 7-11, Jan-Feb 1993. Copyright 1993, The Society for the Advancement of Material and Process Engineering (SAMPE).

Arachne machine n. (1) A machine for producing loop-bonded nonwovens. The fabric is formed by knitting a series of warp yarns through a fiber web processed on a card. Also see bonding. (2) Stitch bonding. 

Stitch bonding n. A bonding technique for non-wovens in which the fibers are connected by stitches sewn or knitted through the web. Kadolph SJJ, Langford AL (2001) Textiles. Pearson Education, New York. 

Sheet, web, or matt of directionally or randomly oriented fibers, bonded by friction, and/or cohesion, and/or adhesion excluding paper and products which are woven, tufted, stitch-bonded incorporating binding yams or filaments, or felted by wet milling. 

Nonwovens are textile products that are manufactured directly from fibers. They are defined as a manufactured sheet, web, or matt of directionally or randomly oriented fibers, bonded by frictiOTi, and/or cohesion, and/or adhesion excluding paper and products which are woven, tufted, stitch-bonded incorporating binding yams or filaments, or felted by wet milling whether or not needed. The fibers may be of natural or man-made origin. They may be staple or continuous filaments or maybe formed in situ [37]. 

Zeisberg P (1990), Stitch-bonding technology for the production of innovative composites , Melliand Textilber, 71(11), 872-874. 

Figure 8.1 indicates that geotextile structures include continuous sheets of non-woven, woven, and warp knitted fabrics, and stitch-bonded fibres or yams. The woven and warp knitted materials can be made to have a similar structure to certain of the textile-related products (essentially geogrids) to be used as alternatives. The non-woven geotextiles can be combined with the textile-related structures to make geocomposite products that are multifunctional. 

Erth H. (2003), Manufacturing and processing of nonwovens on warp-knitting and stitch-bonding machines. Part 1 YUl-VliesstoffNomvoven IntemationalNi. 158,880-881, Part 2 VNI - Vliesstoff Nonwoven International Nr. 160, 928. 

Stitch-bonded geotextiles are produced by stitching yarns or monofilaments through a fibrous web, thus obtaining a cohesive fabric. Alternatively, cross-laid yarns may be stitched together. 

The architectures of woven, nonwoven, knitted and stitch-bonded geotextiles are shown schematically in Figure 2. 

Keywords geotextile, geomembrane, woven fabric, nonwoven fabric, knitted fabric, stitch bonding, fabric architecture, coating, application of geotextiles and membranes. 

Nonwoven Manufacturing. Cotton staple is readily processed to form carded, air laid, or carded/crossed-lapped webs that can be bonded by various techniques to form useful nonwoven materials, eg, needlepunched, spimlaced (hydroentangled), and stitch-bonded nonwovens, and resin-bonded and thermal-bonded carded fabrics (68). Many times a combination of these processes is used to produce hybrid structures and other products. Cotton s share of the nonwovens market in 2002 is 7.8% globally and 2.8% in North America (69). In 2000-2001, 32-36 million kg (70-80 million lb) of cotton was used in North America to... 

By contrast, before the first ultrasonic stitch bond is made on the device, the circuit must be oriented so that the wire moves toward the second bond site only in the direction of the stitch. This necessitates rotational movement, which not only complicates the design of the bonder, but increases the bonding time as well. 

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