Nylon powder

Powder Coating. Nylon-11 and nylon-12 are used in powder form for anticorrosion coating of metals. Dip coating and electrostatic and flame spraying are used. Dip coating, which involves immersing a preheated article into fluidi2ed nylon powder, is most suitable for automation. 

Nylon powder. Pellets were dissolved in ethylene glycol under reflux. Then ppted as a white powder on addition of EtOH at room temperature. This was washed with EtOH and dried at 100° under vacuum. 

In an industrial application dissolution/reprecipitation technology is used to separate and recover nylon from carpet waste [636]. Carpets are generally composed of three primary polymer components, namely polypropylene (backing), SBR latex (binding) and nylon (face fibres), and calcium carbonate filler. The process involves selective dissolution of nylon (typically constituting more than 50wt% of carpet polymer mass) with an 88 wt % liquid formic acid solution and recovery of nylon powder with scCC>2 antisolvent precipitation at high pressure. Papaspyrides and Kartalis [637] used dimethylsulfoxide as a solvent for PA6 and formic acid for PA6.6, and methylethylketone as the nonsolvent for both polymers. 

As shown in Table 9.6, the detonation velocity is highly dependent on the density of the PBX, which, in turn, depends on the mass fraction of HMX or RDX.PB When a mixture of nylon powder and HMX particles is pressed into an explosive of the desired shape, a high-density HMX-PBX is formed. However, during the formulation process, the material is sensitive to pressurization and to mechanical shock. 

The dimer-rich fractions were adsorbed on 30 parts of Woelm alumina, activity grade IV (i.e., alumina containing 10% water) and eluted first with mixtures of chloroform and cyclohexane and on a second pass with benzene and cyclohexane. Occasionally, acetone-cyclohexane mixtures were used for better separation of alcohols and dimers and nylon powder chromatography for ultimate purification. Even at a 30 1 (alumina lignin) weight... 

Another dimer was isolated from both sugar maple and Norway spruce and obtained in pure form by chromatography on a nylon powder column. The individual melting points and mixture melting point of the substance obtained from the two woods were 77°-78°C. The compound acetylated... 

DNP-Amino acids which are soluble in diethyl ether can be separated [19-23] in a number of solvent systems (Table 4.1). The column chromatographic separation of many diethyl ether- and water-soluble DNP-amino acids has been accomplished by Beyer and Schenk [24,25]. They used a column packing material which consisted of nylon powder, and eluted with citrate buffer (pH 3.0) at 30 °C and at a flow-rate of 0.5 ml/min for water-soluble DNP-amino acids. The diethyl ether-soluble amino acid derivatives were eluted with phosphate buffer (pH 8) at 30 °C and at a flow-rate of 0.5 ml/min. The water-soluble compounds were monitored at 313 nm, while 366 nm was used for the diethyl ether-soluble derivatives. The separation of both types of DNP-amino acids with this system is shown in Fig.4.10. 

In packed bed reactors the enzyme-catalyzed reaction is carried out in a column of 100 pl-10 ml volume. The column is filled with tiny particles bearing the immobilized enzyme. The continuously formed reaction product is indicated colorimetrically or electrochemically. Enzyme carrier materials with advantageous flow behavior are porous glass with pores of a defined size, organic polymers, like nylon powder, and inorganic polymers. 

Thiabendazole Natural waters Nylon powder Room-temperature phosphorescence 4.5 ng mL 1 Flow injection system solid phase at the detector (optode) [518]... 

G.N. Piccirilli, G.M. Escandar, Flow injection analysis with on-line nylon powder extraction for room-temperature phosphorescence determination of thiabendazole, Anal. Chim. Acta 646 (2009) 90. 

DeconyL [Plastic Coatings Ltd.] Nylon powder coatings. 

Nylon N-01% SI-N. [Presperse] Nykm 6 6, mediicone blends surface-treated nylon powders for use in anhydrous systems, emulsions, powdered formulations provides lubricious feel for cosmetics. 

The carbohydrate moiety of j3-D-fructofuranosidase of Candida utilis was suggested to be localized at certain sites of the enzyme protein. The oxidation of the sugar moeity with periodate to a certain extent had no effect on the enzyme activity, but the stability of the enzyme was decreased. This partially oxidized enzyme bound hide powder or nylon powder and the enzyme activity was retained. The enzyme was shown to be divided into glycoprotein sub-units of a similar molecular size when heated in the presence of sodium dodecyl sulphate. The enzyme did not dissociate upon treatment with reducing agent such as mercaptoethanol. 

Nylon powder coatings are tough, durable substitutes for paint which are applied in 100% solid form which eliminates the need for solvents. 

Fig. 2. An automatic, in-line powder coating system, the Autocoat, based on the fluidised bed technique. It is capable of repetitively coating 15,000 articles per 8 hr. shift in polyethylene, PVC or nylon powder. (Courtesy of Plastic Coatings Ltd.)...

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