Foamed spray

Epon Foam Spray 175, yi Eow Temperature Insulation, bulletin. Shell Chemical Co., Houston, Tex., Nov. 1963. 

Foam spray dryiag coasists of forcing gas, usuaHy air or nitrogea, iato the product stream at 1.38 MPa (200 psi) ahead of the pump ia the normal spray dryer circuit. This method improves some of the characteristics of dried milk, such as dispersibHity, bulk deasity, and uniformity. The foam—spray dryer can accept a condensed product with 60% total soHds, as compared to 50% without the foam process. The usual neutralization of acid whey is avoided with the foam—spray dryer (see Drying Foams Sprays). 

The city s fire department now has 60 full-time employees, modern fire engines, foam-spraying trucks and other vehicles to combat hazardous materials spills and fires of all sizes. 

Portable fire water monitors and foam monitors give the fire suppression team the flexibility to set up the equipment in a location that provides maximum coverage of the water or foam spray with limited exposure to the fire personnel. Portable monitors can be set in place, with the stream on the equipment being protected, and fire personnel do not have to constantly monitor the operation. 

Parks, O. W., Wong, N. P, Allen, C. A. and Schwartz, D. P. 1969. 6-frarcs-Nonenal An off-flavor component of foam spray-dried milks. J. Dairy Sci. 52, 953-956. 

Tamsma, A., Kurtz, F. E. and Pallansch, M. J. 1967. Effect of oxygen removal technique on flavor stability of low-heat foam spray dried whole milk. J. Dairy Sci. 50, 1562— 1565. 

Hanrahan, F. P. and Webb, B. H. 1961B. U.S. Department of Agriculture develops foam-spray drying. Food Eng. 55(8), 37-38. 

Industrial uses of aerosols include aerosol propellants, anti foam sprays, fire extinguishers and paints. Herzka Pickthal (Ref 5) describe aerosol propellants, containers, valves, filling methods, lab procedures, emulsified systems, etc Refs 1)Webster s New Collegiate Dic-... 

Foams can also be involved in the drying of food products. A wide variety of foods, including fruits and vegetables, can be foamed and then spread out in thin layers on a support for foam-mat drying [633,845], Other foods, such as milk, cream, and cheese can be dried by foaming them, then injecting the foam into a spray-drier. This process is called foam spray drying [633],... 

Creamy flavors in butter have been associated with 4-cis heptenal produced for autoxidation of isolinoleic acid (Begeman and Koster, 1964). Drier flavor in foam spray-dried milk has been associated with 6-rra x-nonenal, which has a flavor threshold in fresh milk of 0.07 pg/kg (Parks et al., 1969). Bassette and Keeney (1960) implicated a homologous series of autoxidation-derived saturated aldehydes, together with products of Maillard browning, in cereal-type off-flavors in powdered skim milk. Staleness in dry whole milk may be associated with saturated and unsaturated aldehydes (Parks and Patton, 1961). 2,4-Decadienal has been reported to be the principal compound responsible for the off-flavor associated with spontaneously oxidized milk (Parks et al., 1963). Oxidized flavors in sunlight-exposed milk are commonly related to C6 to Cn alk-2-enals... 

SAFETY PROFILE Poison by inhalation and ingestion. Corrosive. Dangerous when exposed to heat, open flame (or sparks), or powerful oxidizers. Can react with oxidizing materials. To fight fire, use alcohol foam, spray or mist, dry chemical. When heated to decomposition it emits toxic fumes of CL. See also ALLYL COMPOUNDS and ESTERS. 

DFG MAK Moderate skin irritant DOT CLASSIFICATION Forbidden SAFETY PROFILE Moderately toxic by ingestion. Mildly toxic by inhalation. Moderate skin and eye irritant. A shock- and heat-sensitive explosive. Dangerous fire hazard when exposed to heat, flame, reducing agents. To fight fire, use dry chemical, alcohol foam, spray and mist. When heated to decomposition it emits acrid smoke and fumes. See also PEROXIDES, ORGANIC and ESTERS. 

The spraying process is carried out at ambient temperatures. The spraying of urethane-modified isocyanurate foam is not as easy as urethane-foam spraying because the cyclotrimerization reaction of isocyanate groups requires relatively higher temperatures than for urethane foams. An example of the spraying of urethane-modified isocyanurate foams was reported (198). The spraying was conducted with formulations at a low-NCO/OH equivalent ratio. 

Aerosol foams, sprays, and powders have been used in personal [4,5], household [6], engineering, food, cosmetic [7], and pharmaceutical products [8-10]. This technology has had a significant influence on society in the last 50 years. Many people have direct experience of the pharmaceutical aerosol systems used to treat asthma. The ability of the patient to use these aerosols properly is a serious concern in the treatment of this disease. This may in part be attributed to... 

Povidone-Iodine Foam Spray (10%) Povidone-Iodine Gargle Solution... 

Industrial usage includes a variety of tank, vessel, and piping insulation. The PIR foams are often preferred, because of their higher continuous service temperature (150 C). Cut and preshaped slabstock is used for many industrial plant piping applications. The foam spraying of tanks and pipelines is getting considerable attention in the Middle East and African markets. 

Strong Gale High waves (20 ft), sea begins to roll, dense streaks of foam, spray may reduce visibility Slight structural damage occurs, slate blows off roofs... 

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