Polyester yarns

Studies in Photophysical and Photodegradation Processes in Aromatic Polyester Yarns... 

Watering polyethylene, flexible PVC tube reinforced with polyester yarn. 

Table II gives the crystallinity values for various kinds of polyamide yarns. In one case, the occurence of a relatively amorphous skin can be detected. There is also an example of the effect of an azimutal correction. Absolute crystallinity values do not agree well with X-ray based crystallinity values. Nevertheless, there is a general qualitative agreement in the difference between polyamide and polyester yarns (it is well known that crystallinity is generally higher for polyamide than for polyester commercial filaments).

Similarly, differences in manufacturing substantially affect the DSC melting profile (7). In figure 8 we see thermal curves of nearly identical polyester yarns. Sample one and two are identical in composition--both contain a dyability additive--but were annealed at different temperatures as can readily be seen by the position of the annealing "scars" on the thermograms. The effect of the dyability additive apparently is that it lowers and broadens the melting peak destroying its characteristic first-run, double-peak behavior. 

Pressure Batch Dyeing of Polyester Yarn Packages. 

Dyebath/auxil iary bath reuse has been demonstrated on a pilot-scale to be a feasible, economical alternative to conventional batch dyeing processes. Atmospheric disperse dyeing of nylon and polyester carpet and nylon pantyhose, and pressure disperse dyeing of polyester yarn packages have all been demonstrated as suitable candidates for plant incorporation of the reuse techniques. 

Slightly opaque aqueous solution developed specifically for the sizing of continuous filament polyester yarns for weaving on all types of looms including water-jet. May also be used on nylon and acetate. 

A versatile size particularly suitable for texturised continuous filament polyester yarns. Produces a tough resilient film with good adhesion to polyester thus reducing the tendency for size to shed from the yarn during weaving whilst eliminating the problem of sized threads sticking to each other or to the beam. 

White opaque aqueous solution. Recommended for use on continuous filament acetate and polyester yarns for weaving in both water jet and conventional looms. 

Post cleanup of polyester yarns and fabrics Bleaching of nylon... 

Effective coning oil designed for use on low denier nylon and polyester yarns. 

Effective, low viscosity coning oil for use on all deniers of polyester yarns. Provides good oil pickup at lower oil roll speeds, reducing sling-off. 

Non-mineral oil coning oil for use for use on nylon and polyester yarns. Most effective on nylon stretch yarns that are subsequently knitted into apparel containing rubber yarn. 

Size lubricant for high-twist polyester yarns. 

Last rinse lubricant for spun and texturized polyester yarn for sewing thread. 

To increase the color yield of cationic or disperse colors when dyeing polyester yarn 64 in open or pressure becks. 

Special dispersion for coating polyester yarns to be used for technical fabrics (paper, felt, etc.) adhesive for pigment printing. 

Winding oil especially for dyed polyester yarns, no influence on the fastness of dyestuffs. 

Fibers and textiles are well suited to NIR reflectance analysis. Analyses include identifying the type of fiber, the uptake of dyes, the presence of processing oil in polyester yarns, and the presence of fabric sizing agents. 

FIGURE 1.8 Typical polyester yarn bulking process, faise-twist texturing. 

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