Fabric harness satin-weave

Figure 6.9 An 8-harness satin weave fabric of Nextel 720 fiber (courtesy of N. Chawla)...

Egyptian development See casting, investment, eight-harness satin weave See fabric, woven eight-harness satin. 

In terms of fiber architecture, the most mature composites utilize Nextel fibers in the woven form and usually in an 8 harness-satin weave, although other weaving patterns are available (i.e. plain weave). The woven fabric enables easy handling of the fiber and is formable to more complex shapes. Alternately, fiber tows can be utilized by forming... 

Figure 21.12 4-Harness satin weave fabric. Source Reprinted from SP Systems, Newport, lOW, technical data with kind pennission.

An eight-harness satin weave is a fabric that has a seven by one weave pattern in which a filling thread floats over seven warp threads and then under one. Like the crowfoot wave, it looks different on one side than on the other. This weave is more pliable than any of the other weaves and is especially adaptable to forming around compound curves. 

The second approach is to develop a technique or techniques that will allow the designer to use the full potential of the material and avoid the microcracking phenomenon. This is the approach taken at Itek through its vendors, and the test data presented in Tables II and III indicate that it has been successful. GY70/X 30 material, woven into a 2-dimensional fabric, a 4040, 8-harness satin weave, when laminated as a balanced composite (0, 30, 60, 90, 120,... 

Composite fabrication. Test laminates were prepared by coating graphite cloth (8-harness satin weave cloth) designed as a style 133 fabric with a DMF solution of bis-maleimide E and drying the prepregs in an air oven at 160°C-170°C for 15 min. The dried prepregs (4 or 9 plies) were stacked and pressed between aluminum plates covered with a tetrafluoroethylene film. The resulting laminate was then cured in a flat platen press at 232°C at a pressure... 

To integrate the ultrasonic sensor to textile structures as well as to form electric circuits in the stmcmres, silver-plated nylon yarn with a linear resistance of <50 n/m and with a yam count of 312/34f x 4 dtex is used. To prevent formation of short circuits in the textile-based electric circuit, conductive yams are hidden in the stmcture. A fabric stmcmre is considered as a double-woven fabric, and conductive yarns are placed in the middle layer of the stmcmre. The set of warp yams of the upper layer are linked to the set of weft yarns from the bottom layer, and thus the two layers are held together. A four-harness satin weave is chosen for both layers. Fig. 3.2 shows the diagram representing the drawdown, threading, and lift plan of the double-woven cloth together with the 3D-graphical representation of the woven fabric stmcture. 

The thermostamping process is dominated by the fabric architecture. Currently, most of the pure and hybrid woven fabrics used in textile composites are simple 2D fundamental weaves, that is, plain, twill and satin weaves, which are identified by the repeating patterns of the interlaced regions in the warp and weft directions. The plain weave is one of the most commonly used basic reinforcements for woven-fabric composites. In a plain-weave structure, one weft yarn goes over and under warp yarns as shown in Hg. 6.2. In a twill-weave structure as shown in Fig. 6.8a, each warp yam is woven over two consecutive weft yarns and under the following two weft yarns. The UC of a twiU-weave fabric is shown in Fig. 6.8b. The satin-weave fabric has good drapability, with a smooth surface and minimum thickness. One warp yarn is woven over N(N>2) successive weft yarns and then under one weft yarn. This weave structure is called an (N + l)-harness satin weave. The satin-weave fabric as shown in Fig. 6.9a is a 4-haraess satin-weave fabric, and the associated UC is shown in Fig. 6.9b. 

Scarborough and Cadogan (2006), Lan et al. (2009) used materials that were an 11.5 X 11.5 count, 203 g/m, five harness satin weave (5HS) fabric made from 6K 1M7 carbon tows and TP407, a thermosetting polyurethane SMP resin with a Tg of approximately 55°C. 

Fabric Style 285 (four-harness satin weave) in Fiberite 934 epoxy. Fiberite Corp., Winona, Minn. tWet indicates that sample was tested after 600 hours at 7TC and 75% RH. 

Woven reinforcement material constructed is by interlacing fibers, yarns, or filaments to form such fabric patterns as basket, plain, harness, satin, leno weaves, scrim, etc. These different weaving patterns are used to provide different processing and/or directional properties. There are filling threads that represent threads in the so-called machine direction warp threads represent those in the transverse direction or at 90° to the filling threads. 

Satin weave The warp and weft threads are crossed in a programmed order and frequency to obtain a flat appearance. As a result, one side of the fabric has more warp threads, while the back appears to consist mainly of weft threads. The higher the satin number (7 satin, 8 satin), the higher the count of warp and weft threads. Satin weaves allow production of fabrics with high mass per unit of surface area, and good drapability over molds. Different satin patterns are used. See Ei t hamess satin and four-harness satin. 

A 5-harness satin (5-HS) weave will have its warp yarns running over four weft yarns and under one weft yarn as shown in Fig. 9.5. Other n-HS weaves used in composite materials include 8-HS, where the warp yarn passes over seven weft yarns and under one, and 12-HS where the warp yarn passes over eleven weft yarns and under one. It can easily be understood that the more yarn passes over the other yarn, the straighter and less crimped will be the yarns present in the fabric. The straighter the segments, the more the fabric composite behaves as a lamina in a laminated composite, increasing the inplane properties at the expense of out-of-plane properties and interlaminar shear strength - and of course vice versa. 

Four-harness satin refers to a fabric weave also named crowfoot satin because the weaving pattern when laid out on cloth design paper resembles the imprint of a crow s foot. In this type of weave there is a three by one interlacing, that is, a filing thread floats over the three warp threads and then under one. This type of fabric looks different on one side than on the other. Fabrics with this weave are more pliable than either the plain or basket weave and, consequently, are easier to form around curves. 

The Sylramic fiber was fabricated by DuPont as a 10 pm diameter stochiometric SiC fiber and bundled into tows of 800 fibers each. The sizing applied was polyvinyl alcohol (PVA). For this study, the four lots of fibers, which were used, were wound on 19 different spools. The tow spools were then woven into a 5 harness satin (HS) balanced weave at 20 ends per inch (EPI). 

Morino and Matsudaira [32] had predieted the mechanieal properties and hand value of the fabric from the newly defined weave strueture parameters namely the erossing over firmness factor) and the floating yam faetor. For their study, 5.9 tex eotton yam were used for warp and 8.3 tex/24 polyester filament was used for the weft. Ten fabries with three fundamental weave namely plain, 2/2 twill and 5- harness satin are eonstmeted as mentioned below ... 

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