Sewing threads

Includes sewing thread, sHver knit backing, and other industrial appHcations. 

Sewing Thread. Spun yams and filament yams of PVA fiber with their characteristics of low elongation and high strength are used as industrial sewing threads for leather materials such as shoes and bags and for similar items. In Japan, the PVA fiber threads are also used for sewing tatami mattress. 

In addition to aerospace uses, sihca fibers can be twisted into sewing threads and yams for weaving into fabrics. These fabrics are used extensively for heat-resistant clothing, flame curtains for furnace openings, thermocouple protection, and electrical insulation. The cloth can also be used to encapsulate other fibers to produce flexible sheets. 

Knitted, woven, braided or sewn fibres compression packing, sewing thread, membranes, filter media, filter bags, cartridges, microfiltration membranes, vents and adsorbent products... 

Carpets and rugs, 74% industrial and other (tire cord and fabric, rope and cord, belting and hose, sewing thread), 16% apparel (especially hosieiy, anklets, and socks), 10%... 

Clothing (suits, pants, shirts, and dresses either nonblended or blended with other fibers such as cotton), 50% home furnishings (carpets, pillows, bedspreads, hose, sewing thread, draperies, sheets, pillowcases), 20% industrial (tire cords), 30%... 

Wallace Carothers and coworkers at DuPont synthesized aliphatic polyesters in the 1930s [Furukawa, 1998 Hounshell and Smith, 1988]. These had melting points below 100°C, which made them unsuitable for firber use. Carothers then turned successfully to polyamides, based on the theoretical consideration that amides melt higher than esters. Polyamides were the first synthetic fibers to be produced commercially. The polyester and polyamide research at DuPont had a major impact on all of polymer science. Carothers laid the foundation for much of our understanding of how to synthesize polymeric materials. Out of that work came other discoveries in the late 1930s, including neoprene, an elastomer produced from chloro-prene, and Teflon, produced from tetrafluoroethylene. The initial commercial application for nylon 6/6 was women s hosiery, but this was short-lived with the intrusion of World War II. The entire nylon 6/6 production was allocated to the war effort in applications for parachutes, tire cord, sewing thread, and rope. The civilian applications for nylon products burst forth and expanded rapidly after the war. 

It s easy to stretch a layer of dried white glue until it splits in half, and it s easy to yank a single strand of sewing thread into two pieces. Combine the glue with many strands of thread, however, and the resulting composite is most resistant to breakage—but only in the directions parallel to the threads. Make this composite and test its strength. 

White glue, sewing thread, aluminum foil, scissors... 

Using nylon sewing thread (prepared thread in Activity 5.5) or fishing line, tie pieces made from posterboard and colored beads to each loop and secure with a dot of glue. 

Once dehydrated, the microfibrils are practically without functionality in ordinary food processing and preparation operations, because the inert microcrystallites are difficult for water to penetrate. The polymorphs, cellulose I and II (Blackwell, 1982 Coffey el al., 1995), are differentiated by their molecular orientation, hydrogen-bonding patterns, and unit-cell structure. Cellulose I is the natural orientation cellulose II results from NaOH treatment under tension of cellulose I with 18-45% alkali (mercerization). The I—II transition is irreversible. Mercerization strengthens the fibers and improves their lustre and affinity for dyes (Sisson, 1943). Sewing thread was relatively pure mercerized cotton until the advent of synthetic polymer fibers. 

Specialty product for bonding polyester sewing threads. Exhibits very high adhesion to polyester imparting excellent cohesion. Dries to a slightly tacky film which improves package build and stability. 

Low sling sewing thread lubricant for filament polyester. Designed for high speed sewing of heavy weight fabric. 

Sewing thread lubricant for all types and deniers of filament and spun thread. 

Economical, non-silicone sewing thread lubricant for filament polyester. 

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

Provides very low fiber/metal friction base for over-oiling with sewing thread finishes. 

Lubricant/softener containing silicones, improves sewability of woven- and knit goods, cotton sewing thread lubricant,... 

Sewing thread lubricants based on silicone have been tried and proven in final finishing of sewing thread to Improve the sliding properties and to Improve their resistance to heat. The sewability is improved, the number of thread breaks reduced and the lustre of the sewing improved. 

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