Synthetic fiber alloy

The corrosion resistance of the Pt metals has made the Pt crucible and the Pt electrodes commonplace laboratory tools. The glass industry makes use of large amounts of Pt and its alloys for manufacturing veiy pure glass. Synthetic fibers often are extruded through spinnerettes made of Pt alloys. The large use of Pt metals in dental and medical devices, in jewelry, and for decorative purposes is based on the corrosion resistance and general appearance of these metals. 

Nickel is resistant to organic acids dilute ammonium hydroxide (<2%) and to chlorination or fluorination. These alloys 200 and 201 are used in petrochemical, chemical industry, food industry and in the production of synthetic fibers. 

Innovative structures covering different cross-sectional shapes, including hollow, and different sizes, including microdenier or micrometer, or even smaller than this in diameter, could be developed in manufactured fibers. By co-polymerizing, the chemistries of two different monomer compounds could be combined to form a polymer chain with new properties. Likewise, two different polymers could be co-extruded through the same orifice to form an alloy or a bicomponent fiber. These are, therefore, truly synthetic fibers, which cover a broad range of sizes and shapes and a very wide range of mechanical and physical properties. 

Predominantly rhodium, palladium, iridium, and platinum are used in technical applications. Pure metals and alloys serve as corrosion-resistant materials for melting tubes, laboratory instruments, and spinning jets in synthetic fiber production. Other applications include uses as catalysts in chemical synthesis, in car mufflers, and in the electrotechnical industry. They also find use as alloys in dentistry and orthopedics. These quantities are recycled and serve as a secondary source of PGM. 

Scope. This section applies to slings used In conjunction with other material handling equipment for the movement of material by hoisting, in employments covered by this part. The types of slings covered are those made from alloy steel chain, wire rope, metal mesh, natural or synthetic fiber rope (conventional three strand construction), and synthetic web (nylon, polyester, and polypropylene). 

TABLE 7.11 RESIN, STEEL, ALLOY, TITANIUM, CERAMIC, RUBBER, NATURAL AND SYNTHETIC FIBER... 

Applications. Alloy 20 is a highly alloyed iron-base nickel-chromium-molybdenum stainless steel developed primarily for use in the sulfuric acid-related processes. Other t5fpical corrosion-resistant applications for the alloy include chemical, pharmaceutical, food, plastics, synthetic fibers, pickling, and FGD systems. 

The first fibers used by humans were probably those that occur naturally as tissues or excretions of either vegetables or animals (see Table 87). At much later times, after metals had been discovered, humans also learned to manufacture - from some of the ductile metals, mainly gold, silver, and their alloys - thin filaments (not fibers, however), which have since been used to decorate textile fabrics. It was only during the twentieth century, after synthetic plastics were discovered, that it became possible to make artificial human made fibers. The great majority of the natural fibers, such as cotton and wool, occur as staple fibers, short fibers whose length is measured in centimeters. Silk is different from all other natural fibers in that it occurs as extremely long and continuous filaments several hundred meters long. 

Appendix 2 was compiled and formatted by eomposition paralleling the presentation for the fibrous minerals. The list, in eontrast with that of the minerals, shows a predominanee of simple chemical compounds that combine two or three elements. One-third of the reeorded synthetie fibers are of elements or binary alloys. Another third are compounds such as sulfides, phosphides, and halides that do not eontain oxygen (Table 2.9). Only three synthetic fibrous silicate compounds etre listed, although undoubtedly other experimental silicate combinations have been made but not recorded by us. 

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