Fibres bicomponent fibre types

Bicomponent fibres are sjmthetic fibres composed of two firmly but separately combined polymers of different chemical and physical structures. The structure of the bieomponent depends on the shape of the spinnerette orifice (side-by-side, sheath eore, matrix - fibril and multi-fibrillary) and the type of spinning method. Due to the structural differences, the two components shrink differently on heat treatment and form crimp and greater bulk in the fibre. The first fully synthetic bicomponent was an acrylic (Sayelle, Orion 21). The use of sheath-core fibres composed of nylon 6,6 and nylon 6 (Heterofil, ICI) for floor coverings is described. 

Modified bicomponent fibres of cover/core type were obtained by the admixture of special additives into the... 

The bicomponent fibres are suitable for felts, needle-punched carpets and tiles and upholstery fabrics the appearance of these products is more pleasant than that of uncrimped fibres owing to the absence of gloss and they have a bulkier, softer handle. Continuous crimped yams could be suitable for certain types of stretch fabrics or knitted products but so far these products have not reached the commercial stage. Attempts to use the bicomponent fibres for tufted carpets have not been satisfactory so far for two reasons. One reason is that the resilience of the piles is less than that of wool or nylon. Another reason is that fibrillated fibres may show a tendency towards a further fibrillation under severe wear or abuse. 

The use of bicomponent fibres, in which each individual fibre is made up of two types of polymer, lying either side by side or in a sheath-core formation, may be regarded as... 

Although the existing fibre-making technique is able to produce a bicomponent fibre of many cross-sectional structures, the production of bicomponent nanofibres has been limited to two basic types of cross-sectional structures, the core-sheath and the side-by-side . These bicomponent nanofibres are eiectrospun via special spinnerets. Two polymer solutions flow within the spinneret as the sheath and core, or side-by-side, to the tip of the nozzle and then are subjected to a co-electrospinning process. The formation of bicomponent nanofibres is determined by the laminar bicomponent jet. 

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