Spray bonding

End Uses Textile coatings, spray bonded non-wovens, adhesives, fibers. 

Durability to Washing Excellent Durability to Drycleaning Good Forms a hard, tack-free film that does not discolor when subjected to high temperatures. Excellent mechanical stability. Especially recommended for spray bonding fiberfill that subsequently will be molded. 

Property Bonded Dry laid Wet laid Spunlaid Meltblown Needle- punched Spray bonded... 

A ceramic bond coat is almost exclusively used to modify a surface for adhesive bonding. The ceramics include, but are not limited to, alumina, zirconia, titania, spinels, carbides and combinations of these materials." The thermally sprayed bond coatings provide a rough surface on the order of 8 p,m R that has a three-dimensional morphology. Arc-plasma is traditionally used for deposition of the ceramics for these applications. 

Spray bonding n. A process of binding fibers into a non-woven fabric involving the spray application of a fabric binder. 

Spray bonding is used for applications that require high loft or bulk. Several spraying methods can be used to apply adhesives, including conventional air spray, hydraulic cold airless spray, hot spray, and hot airless spray. The main types of spray equipment are described in Table 13.10. 

Chemical bonding is the process of bonding a web by means of a chemical and is one of the most common methods of bonding. The chemical binder is applied to the web and is cured. The most commonly used binder is latex because it is economical, easy to apply, and very effective. Several methods are used to apply the binder, and they include saturation bonding, spray bonding, print bonding, and foam bonding. 

Spray bonding Spray nozzles are flexibly arranged over the fabric to avoid streakiness. To avoid destruction of the web structure, they do not work with compressed air. A suction box that is arranged below the web fixes the web onto the sieve belt. 

Corrosion Resistant Fiber-Reinforced Plastic (FRP). Fiber glass reinforcement bonded with furfuryl alcohol thermosetting resias provides plastics with unique properties. Excellent resistance to corrosion and heat distortion coupled with low flame spread and low smoke emission are characteristics that make them valuable as laminating resins with fiber glass (75,76). Another valuable property of furan FRP is its strength at elevated temperature. Hand-layup, spray-up, and filament-win ding techniques are employed to produce an array of corrosion-resistant equipment, pipes, tanks, vats, ducts, scmbbers, stacks, and reaction vessels for industrial appHcations throughout the world. 

Catalytic methanation processes include (/) fixed or fluidized catalyst-bed reactors where temperature rise is controlled by heat exchange or by direct cooling using product gas recycle (2) through wall-cooled reactor where temperature is controlled by heat removal through the walls of catalyst-filled tubes (J) tube-wall reactors where a nickel—aluminum alloy is flame-sprayed and treated to form a Raney-nickel catalyst bonded to the reactor tube heat-exchange surface and (4) slurry or Hquid-phase (oil) methanation. 

Bonded Solid-Film Lubricants. Although a thin film of soHd lubricant that is burnished onto a wearing surface often is useful for break-in operations, over 95% are resin bonded for improved life and performance (62). Use of adhesive binders permits apphcations of coatings 5—20 p.m thick by spraying, dipping, or bmshing as dispersions in a volatile solvent. Some commonly used bonded lubricant films are Hsted in Table 12 (62) with a more extensive listing in Reference 61. 

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