Impregnated fabric

Figure 4.21 shows the sensor output for the smart automated sensor expert system-controlled run. The resin reached the center sensor at 37 min. The viscosity is maintained at a low value by permitting slow increases in the temperature. At 60 min, fabric impregnation was complete. The resin was advanced during a 121 °C hold to a predetermined value of degree of cure of 0.35, based on the Loos model s predictions of the extent of the exothermic effect. This value of a is clearly dependent on panel thickness. Then at 130 min, the ramp to 177°C was begun. Achievement of an acceptable complete degree of cure was determined by the sensor at 190 min. Then the cure process was shut down. 

In summary an FDEMS sensor system can be used to monitor the processing properties in situ during the fabrication process of a composite part. A smart sensor control system can be used to monitor resin properties for reproducability-quality assurance, to ensure fabric impregnation, and to control and optimize the composite fabrication process intelligently through in situ sensor feedback. 

A similar study was performed in the textile industry where the workers were exposed during the fabrics impregnation, and in the leather industry where the workers were exposed during the tanning process. In these two branches pentachlorophenol or pen-tachlorophenol laurate were used, products highly contaminated by PCDDs, the level of PCDFs being much lower, see Table III. The values of the blood and urine analyses are given in Table IX. 

FIG. 21. Cross section through a commercial Prototech electrode fabricated from a carbon fabric impregnated with PTFE- bonded, Pt-catalyzed soot particles. The layer of light color below the electrode is the SiC matrix, determined to keep the electrolyte between the electrodes. 

Cotton fabrics impregnated with grape-sugar solutions are printed with a mixture of finely divided indigo and strong caustic soda suitably thickened. On steaming the indigo white produced... 

Another investigation reported fabrics impregnated with quaternary ammonium compounds expressed vimcidal effects and significantly inactivated the VACV [99], A mixture of vimcidal compounds comprised of quaternary ammonium (bcnzalkonium chloride), a detergent (Triton X100) and citric acid inactivated VACV after a 20 min incubation [86],... 

Figure 8.40. Schematic diagram of the continuous process of fabric impregnation by polyaniline. Numbers indicate (I) (3) (17) for tanks, (2) (4) (7) (10) (14) (16) for fabric, (5) (13) respectively for oxidising and acidic showers, (6) for monomer bath, (8) (15) for drying ovens, (9) for oxidizing bath, (11) for polymerisation step and (12) for acidic bath.

Fabrics impregnated with weakly nitrated nitrocellulose, n.o.s. (including toe puffs, nitrocellulose base), see Nitrocellulose Products, p.l61... 

Fibres or Fabrics Impregnated with Weakly Nitrated Nitrocellulose, n.o.s. Toe board used in the manufacture of boots and shoes. When involved in a fire, evolves toxic fumes in closed compartments, these fumes may form an explosive mixture with air. IMO 4144-1... 

Kimiran Erdem, A., and Sanll Yurudu, N. 0., The evaluation of antibacterial activity of fabrics impregnated with dimethyl tetradecyl (3-trimethoxysilyl propyl) ammonium chloride, lUFS J. Biol, 67(2) (2008), 115-122. 

Lee BW, Kim U, Kim CG. The influence of the particle size of sUica on the ballistic performance of fabrics impregnated with silica colloidal suspension. J Compos Mater 2009 43 2679-98. 

Lee YS, Wetzel ED, Wagner NJ. The ballistic impact characteristics of Kevlar woven fabrics impregnated with a colloidal shear thickening fluid. J Mater Sci 2003 38 2825-33. 

Tack rag n. Fabric impregnated with a tacky substance such as a delayed drying varnish, which is used to remove dust from a surface after rubbing down and prior to further painting. Tack rag should be stored in an air-tight container to conserve its tackiness. 

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