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Sunday, October 11, 2020 | History

2 edition of Dimensional and mechanical properties of warp knitted fabrics made from thermoplastic yarns found in the catalog.

Dimensional and mechanical properties of warp knitted fabrics made from thermoplastic yarns

Abolghassem Khangosstar

Dimensional and mechanical properties of warp knitted fabrics made from thermoplastic yarns

by Abolghassem Khangosstar

  • 393 Want to read
  • 28 Currently reading

Published by Leicester Polytechnic in Leicester .
Written in English


Edition Notes

Thesis (M.Phil.) - Leicester Polytechnic, Leicester 1986.

StatementAbolghassem Khangosstar.
ContributionsLeicester Polytechnic. School of Textile and Knitwear Technology.
ID Numbers
Open LibraryOL17874858M

Non-Crimp Fabric Composites Manufacturing, Properties and Applications. zela 0 Comments. Non-Crimp Fabric Composites Manufacturing, Properties and. Dimensional stability (in fabric), is the change of dimensions in textile products when they are washed or relaxed. The change is always expressed relative to the dimensions before the exposure of washing or relaxing. Shrinkage is also called residual shrinkage and measured in percentage.

Non-Crimp Fabric Composites Manufacturing, Properties and Applications Author: nesyv • Discussion: No Comments Non-Crimp Fabric Composites Manufacturing, Properties and.   Special plaster grids that increase cracking resistance in the plaster were also on show. A lightweight, multiaxial construction made from aramid yarns on a COP MAX 5 multiaxial warp knitting machine with an online spreading process for the production of personal protection equipment was also being presented. Digital innovations.

Yarn is a long continuous length of interlocked fibres, suitable for use in the production of textiles, sewing, crocheting, knitting, weaving, embroidery, or ropemaking. Thread is a type of yarn intended for sewing by hand or manufactured sewing threads may be finished with wax or other lubricants to withstand the stresses involved in sewing.   The knitted fabrics are not specifically limited either, and known knitting methods such as warp knitting, weft knitting, Raschel knitting and the like can be selected at will. The weave fabric or knitted fabrics of the present invention are favorable in that the weave fabric or knitted fabrics can be obtained while the filament yarns are in.


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Dimensional and mechanical properties of warp knitted fabrics made from thermoplastic yarns by Abolghassem Khangosstar Download PDF EPUB FB2

In warp knitting, fabric is made by forming loops from yarns coming in parallel sheet form which run in the direction of fabric formation (like warp in weaving). Every needle is fed by a separate yarn for loop formation. In order to connect the loops into a fabric, the yarns are.

The plain-knitted structure is shown to be a rationally determinate structure only in the fully-relaxed state; in any other state, the nature of the knitted loop is dependent on the yarn's physical properties, mechanical processing, and knitting by: Properties of Warp-Knitted Fabrics.

The mechanical properties of warp-knitted fabrics before and after dyeing were evaluated by breaking strength and elongation, as shown in Table 5. It can be seen from the data that the breaking strength after dyeing reduced about 16%, while the elongation at break increased by about 67%.Cited by: 3.

Knitted fabrics made from cotton/Lycra blended yarn have low breaking force and high elongation percent at break relative to knitted fabrics made from % cotton yarns. View Show abstract. the properties of multifilament and warp-knitted fabrics can provide a theoretical reference for the subsequent development of PLA.

Lim L-T et al. studied the surface and mechanical properties of weft-knitted fabrics made from PLA staple fibers. It was found that the values for bending stiffness, bending lag, shear stiffness andCited by: 3. can influence mechanical properties of the s. composite Also, knitted structures have exceptional formability due to their low resistance to deformation.

In addition, some such as warp -insertion, weftinsert and diagonal yarns in the structure of the warp knitted fabrics improve Many attempts [] have been done to investigate the mechanics. The Texturing subseries consists of articles, lectures, and other papers pertaining to the physical and mechanical properties of crimped yarns, often made from thermoplastic fibers and have a saw-toothed or curled shape, and the methods and processes used for texturing crimped yarns, including false-twist and draw-twist methods.

Relevant articles on snarling, heat setting and treatment, and. knittability ensuring knitted fabrics with better softness, drape, dimensional stability and wicking than normal denier fiber knitted fabrics thus ensuring excellent mechanical and comfort properties.

The hairiness of the microfiber yarns are very low and this in turn creates a low lint shedding propensity and it will generate lesser fly during. MECHANICAL PROPERTIES OF 3D-STRUCTURE COMPOSITES BASED ON WARP-KNITTED SPACER FABRICS Si Chen 1,2, Hai-ru Long, Ying-hao Liu3, Feng-chao Hu4 1College of Textiles, Donghua University, ShanghaiChina 2Key Laboratory of Textile Science &Technology, Ministry of Education, China 3R&D building, BASF PuDong Site, ShanghaiChina 4BAPS, BASF.

0/90 biaxials wave a warp direction, and a weft direction the strands that run the length of the roll are they warp or are they weft. The stub bend is made by bending a piece of conduit into an l shape or 90° bend by placing the free end (short end) of the tube to a predetermined length as indicated in.

After a general introduction illustrating the role of fabric structure and mechanics, subsequent chapters discuss the structural, tensile, bending and shear properties of woven, knitted and nonwoven fabrics. Other chapters review the structure and mechanics of yarns, coated fabrics, 2D.

By far the greater portion of warp- cotton fiber. A fabric knit of wool knit materials is made on the tricot therefore will hold its shape better machine. The most popular fabric knit than a fabric knit of cotton in the on this machine is made of two sets of same construction.

If cotton yarn is warp yarns and is commonly called a firmly knit. giving high strength. A woven fabric is produced by interlacing two sets of yarns, the warp and the weft which are at right angles to each other in the plane of the cloth (Newton, ).

The warp is along the length and the weft along the width of the fabric. Individual warp and weft yarns are called en ds and picks. The interlacement of ends and. The influence of preform stretching on mechanical properties of weft knitted PP/glass fibre composites was estimated. Stretching of Rib weft knitted fabric was performed prior to consolidation in a wale or course direction and biaxially.

Preform stretching increased tensile and bending strength of composite as a result of additional orientation of the reinforcing fibres in the stretching. More results about the thermal–mechanical properties of spacer fabrics are reported in Table is found that the value of the compressive strain for a 10 mN load at 25 °C (ɛ 25) of samples 1, 2 and 5 are lower than those of samples 3 and results agree well with the compression test we have done in the previous study (Yip and Ng, ).

This paper introduces a knitting technique for making innovative curved three-dimensional (3D) spacer fabrics by the computer flat-knitting machine. During manufacturing, a number of reinforcement yarns made of aramid fibres are inserted into 3D spacer fabrics along the weft direction to enhance the fabric tensile properties.

Glass/Polypropylene commingled yarns have been woven inside different three-dimensional (3D) warp interlock fabrics and then formed using a double-curved shape stamping tool. The present study investigates the in-plane and through-thickness behaviour of the 3D warp interlock fibrous reinforcements during forming with a hemispherical punch.

warp-knitted spacer fabrics for impact protection. INTRODUCTION. Warp-knitted spacer fabric is a novel kind of three-dimensional textile structure consisting of two separate outer fabric layers which are joined together but kept apart by spacer yarns [1].

Recently, this kind of fabric has been proposed as cushioning material. Request PDF | Study of three-dimensional spacer fabrics: Physical and mechanical properties | j o u r n a l o f m a t e r i a l s p r o c e s s i n g t e c h n o l o g y 2 0 6 (2 0 0 8) – To this end, a three-dimensional marquisette-like structure is made as follows.

A double-web knitted fabric is made by warp knitting, and is preferably comprised of the front and back mesh webs (1, 2) and connecting yarns (3) passed between the mesh webs alternately. Fig. 2. Reference material V1- multilayer weft knitted fabric Biaxial flat knitting FPCs are mainly produced in prepreg and preform processes.

In preforming, a 3D reinforcing structure can be produced using the textile technologies of weaving, braiding, warp and weft knitting as well as tailored fibre placement (TFP) (an embroidery process. Developments in knitting technology for three-dimensional preforms.

Knitting is the most flexible fabric-forming technology, it can manipulate and control individual yarn placement (through holding, transferring, tucking and floating of stitches), making it ideal for controlling directional mechanical properties for particular load situations.In warp knitted fabric the loops interlock vertically along the length of the fabric.

Warp knits are slightly stretchy and do not ladder. Warp-knitted fabric is made by machine. It is used for swimwear, underwear and geotextiles. Because of the multiple-needle configuration of warp-knitting machines, the warp knit fabrics produced can be very.