Sealing aluminum

Eig. 4. Constmction of a sodium—sulfur battery. A, Negative terminal B, springs plus graphite felt C, sulfur D, carbon E, sodium reservoir E, positive terminal G, iasulator H, aluminum sealing gaskets 1, steel case J, film of sodium K, P-alumiaa tube L, carbon felt M, wick N, aluminum can (67). 

Tapered shaft must be replaced if damaged by wet seal gas or contact with aluminum seal. 

Filled vials are partially stoppered and place in the auto load/unload system (ALUS) to load the lyophilizer. After lyophilization is complete, the vials are stoppered while still in the lyophilizer using an internal stoppering mechanism. They are then unloaded onto conveyer belts to the capping area outside the hlling room where aluminum seals are applied to the stoppered vials and crimped. 

Plate storage. We found that using aluminum seals (Fisher Scientific, Pittsburgh, PA, cat. no. 072-00684) allowed us to store plates at 4°C. The use of opaque seals enables plates to be imaged in the presence of ambient light. In our experience, the Hoechst stain and GFP signal remains stable at 4°C for up to 3 mo. 

Plate-fin heat exchangers are manufactured by assembling plates separated by corrugated sheets, which form the fins. The plates are made from aluminum sealed by brazing. The operation of these devices requires clean fluids. The main applications can be found in cryogenic and natural-gas liquefaction for pressures and temperatures up to 60 bars and 150°C. 

Test Procedures. Blow molded fluorinated and untreated bottles were filled with 370 grams of reagent grade toluene and heat sealed with a low density polyethylene-coated aluminum seal, and capped with a polypropylene closure. Ten sample containers of each type were tested at 50 2°C (50°C) and at room temperature (RT) for permeation and the onset of paneling. Empty containers, both treated and untreated, were also stored with the filled containers to serve as controls. 

The clamping forces are low enough to allow the outer aluminum seal to slide radially with respect to the stainless thin ring without damage to the seal or window. 

The aluminum seals are first etched in KOH. They are then rinsed carefully in water to remove the KOH, and are then soaked in acetone to remove all the water. The aluminum surface to be joined with the window is then roughened with sandpaper. The surface of the window to receive the seal is roughened with sandpaper and epoxy is painted on the seal with a small paint brush. The epoxy used is Shell Chemical Company epoxy resin 828 and Thiokol Chemical Company poly amide resin 308 (50-50 by weight). The seals are held in clamps and cured about 16 hr at 54°C. 

The main limitation of this seal is that the epoxy joints slowly degrade after 6 to 8 cycles and the epoxy joint may loosen from the window. The aluminum seals, however, have been easily re-epoxied to the window wdth good success. 

Chem. Descrip. Methacrylate sol n. polymer in butylacetate/MEK (70 30) Uses Acrylic for heat-sealing lacquers, direct adhesion to aluminum, sealing to PP, PS, PVC... 

Do not use aluminum caps do not use aluminum seals unless the consumer can pull the seal completely off. 

Making caps, closures, and spouts on HDPE bottles compatible with the bottles, ensuring that any aluminum seals used on plastic bottles pull off completely when the bottle is opened by the consumer... 

Injectable products, including lyophilized products, are typically sealed with aluminum seals with plastic buttons on top that must be removed to access the medicament. The plastic buttons are typically made of polypropylene material. In some cases, certain lyophilized products may be held at extreme conditions during shipment or storage. The plastic buttons may not be able to withstand these conditions because of their composition. In these cases, specially designed buttons manufactured from materials that can withstand extreme temperature and shipping conditions are used. 

Figure 4.73 DSC curves for water-ethanol (40 60) mixture precooled at variou.s cooling rates [96] I, 20 II, 10 III, 5 IV, 2 V, 5 VI, 0.5 °C min. Sample mass, 4.7 mg heating rate, 5°Cmin sample ve.ssel, aluminum sealed pan...

Note Chemglass Life Sciences offers a good selection of glassware and accessories for anaerobic media preparation such as 18 mm x 150 mm glass tubes (anaerobic tubes, catalog CLS-4209-10), 20 mm blue butyl rubber stoppers (CLS-4209-14), and 20 mm aluminum seals (CLS-4209-12). 

Fig. 11. After plasma etching for 200 RF hours. Boron carbide coated anodized aluminum sealed with HL126 sealant provides the best corrosion in all configuration.

Upon completion of the incubation time, the two 12-h plates are sealed with aluminum seal and stored at -80°C. One of the 12-h plates will be sent to an external company for sequencing,... 

Aluminum sealing tape for 96-well plates (Nunc, Rochester, NY). 

Remove the aluminum sealing tape from source plate. Using a 12-channel pipette, dilute the compounds in the source plate to the concentration of 1 mM (for example, if starting with 250 nL aliquots of 10 mM stock, add 2.25 pL of DMSO to each well). 

Cover each source plate containing unused small molecules (1 mM) with aluminum sealing tape and place them in a -80 °C freezer for long-term storage. 

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