Silk coatings

Silk, oiled A thin, very soft, and pliable protective dressing made of fine silk, coated with a flexible linseed-oil varnish. Oiled Silk is available in semitransparent or opaque form, made by the addition of talc or starch in the final coating. Oiled Muslin or Oiled Cambric is similar to oiled silk, except that the basic fabric is of glazed cotton it is thicker and heavier and consequently less pliable than oiled silk (see Dressings, protective)P ... 

Wang X.Wenk E, Hu X, Castro GR, Meinel L,Wang X, et al. Silk coatings on PLGA and alginate microspheres for protein delivery. Biomaterials 2007 28 4161-9. 

Fiber dmms can be produced to meet a wide variety of requirements. They can be constmcted with adhesives for water resistance, their interiors can be coated, their walls and ends can incorporate metal foil or asphalt-impregnated pHes, and their exteriors can be decorated by painting, varnishing, and silk screening for both ornamental and functional purposes. 

Nonabsorbable Natural Sutures. Cotton and silk are the only nonabsorbable sutures made from natural fibers that are stiH available ia the United States. Cotton suture is made from fibers harvested from various species of plants belonging to the genus Gossipium. The fiber is composed principally of ceUulose. The seeds are separated from the cotton boUs, which are carded, combed, and spun iato yams that are then braided or twisted to form sutures ia a range of sizes (Table 4). The suture is bleached with hydrogen peroxide and subsequendy coated (finished or glaced) with starch and wax. The suture may be white or dyed blue with D C Blue No. 9. 

Silk (qv) suture is made from the threads spun by the silkworm Bombjx mori. The fiber is composed principally of the protein fibroin and has a natural coating composed of sericin gum. The gum is usually removed before braiding the silk yams to make sutures in a range of sizes. Fine silk sutures may be made by simply twisting the gum-coated silk yams to produce the desired diameter. White silk is undyed. Silk is either dyed black with logwood extract or blue with D C Blue No. 9. The suture may be uncoated or coated either with high molecular weight polydimethylsiloxane or with wax. 

Screenable Resists. Screenable resists or inks (qv) are appHed to the metal-clad substrate through a silk (qv), nylon, or stainless steel screen on which a circuit pattern has been defined. The coating is squeegeed through the stencil onto the substrate, then dried. Depending on whether metal is to be... 

The use of small amounts of the material in paints and surface coatings is claimed to help in eliminating faults such as silking in dipping applications and orange peel in stoved finishes. 

In terms of the average fi om 20 mature fiiiits, floss silk, seeds and fruit coat were isolated, the ratio being 14 %, 15 % and 71 % respectively. The filaments of floss silk on submission to microscopy, showed mainly unicellular trichomas, some of them being formed by two cells. The presence of lignin in the filaments was suggested by the characteristic reaction with phloroglucinol hydrochloride. 

The coating apparafus consisfs of a silk screen mesh fixed to a frame with sufficient tension to squeeze the ink through the screen and onto the blank substrate (e.g., polyimide). The substrate is fixed on an XY fable wifh adhesion fape, and fhe silken screen mesh is masked, wifh an open window in the center for screen printing. The silicon rubber squeeze is a fixed support and can be moved in both X and Y directions. A hot-air or IR ramp is used to dry the coating for solvenf removal. 

Till this time, polymer science was largely empirical, instinctive, and intuitive. Several polymers were commercially available prior to World War I celluloid, shellac, Galalith (casein), Bakelite, and cellulose acetate plastics hevea rubber, cotton, wool, and silk rayon fibers Glyptal polyester coatings bitumen or asphalt, and coumarone-indene and petroleum resins. However, as evidenced by the chronological data shown in Table 1.1, there was little... 

Tin(lV) chloride is a mordant for dying fabrics a stabihzer for perfume in soap used in weighting silk in ceramic coatings in manufacturing blue print papers and to produce fuchsin. Also, tin(IV) chloride is used in preparing many organotin compounds. 

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