Moisture proofing

Liquid sodium alumiaate is available ia steel drums having an approximate capacity of 210 L and bulk shipments are available ia either tank tmcks or railroad tank cars. The density of Hquid sodium alumiaate is usually from 1450 to 1510 kg/m. SoHd products are available ia moisture-proof paper bags or fiber drums containing approximately 23 and 150 kg, respectively. 

Activated alumina is a relatively innocuous material from a health and safety standpoint. It is nonflammable and nontoxic. Fine dusts can cause eye irritation and there is some record of lung damage because of inhalation of activated alumina dust mixed with siUca [7631-86-9] and iron oxide [1317-61 -9] (30). Normal precautions associated with handling of nuisance dusts should be taken. Activated alumina is normally shipped in moisture-proof containers (bags, dmms, sling bins) because of its strong desiccating action. 

Low humidity ethylene oxide gas sterilisa tion procedures and moisture-proof packaging for polyglycoHc acid products are necessary because of the susceptibihty to degradation resulting from exposure to moisture and gamma sterilisation. 

Anhydrous BaCl2 exists as monoclinic or cubic crystals. The transition to cubic occurs at 925 °C. Barium chloride melts at 962°C the dihydrate, which has monoclinic crystals, loses water at 113 °C. Barium chloride, which is very hygroscopic, is sold in moisture-proof bags and steel or fiber dmms. 

Ferric sulfate is shipped in car and truck load lots of 50 lb and 100 lb moisture-proof paper bags and 200 lb and 400 lb fiber drums. 

Cellophane is an old and respected packaging material which has been improved over the years. The two general types are coated with nitrocellulose (N/C) and polyvinylidene chloride (PVDC), respectively. Nitrocellulose-coated cellophane is moisture proof and useful for packaging dry products. It does not exclude oxygen or moisture completely, but for noncritical products it is entirely satisfactory. Baked goods are often packaged in this breathing type film. It is often used for cookies, candies, and rolls because its lack of taste and odor makes it very compatible with these products. 

Paraffin is also used for impregnating paper used for cart ridging expls, as well as moisture proofing paper cartridges already loaded with hygroscopic Dynamites... 

Uses Solvent for natural and synthetic resins, cellulose acetate, nitrocellulose, and some dyes nail polishes dyeing leather sealing moisture-proof cellophane lacquers, varnishes, enamels, wood stains in solvent mixtures perfume fixative jet fuel de-icing additive. 

Transfer from a moisture-proof receptacle contg EGDN dried in desiccator, 0.70 to 0.75g sample (contg less than 0.03% moisture) to a tared 25 ml beaker and weigh accurately immediately. Add 5ml of glacial acetic acid and stir the mixture with a small glass rod... 

All bombs, except the very largest, are packed in wooden boxes or crates. The fin assemblies for the larger bombs are also crated when packed separately from the bombs. Some bombs are packed with fuzes inserted but with primer-detonators removed. However, rhe fuzes are usually removed and packed in sealed moisture-proof containers. In the latter case the fuze wells in the bombs must be closed with plugs. Some fuzes are packed in the same containers with the bombs, others separately. Bombs and components are stored as shipped. Complete rounds should not be assembled in advance of requirements and assembled rounds should be carried with sealing wires and safety in place at all times until installation in the plane. The arming wire should remain in place until the bomb is released, or until the safety pins and sealing wire are replaced and secured... 

Desensitizer = [100x(A+0.009W)J /W, where A = wt of desensitizer W = wt of sample on a moisture-proof basis and 0.009 = compensating factor for soly of desensitizer in acetone... 

Ammonium nitrate is hygroscopic clay coatings and moisture-proof bags are used to preclude spoilage in storage and transportation. 

Once it is cured, concrete has several surface characteristics that are problems for bonding or sealing. The concrete surface is extremely alkaline and will destroy any hydrolysis-sensitive materials that are present at the interface. It often has a weak, porous surface layer that must be penetrated or removed before being bonded. Thus, sealers and primers are commonly used to moisture-proof and strengthen the concrete surface prior to bonding. 

In retained heating methods (dry heat), a simple hot air drying reduces the moisture content to 3-4%. The bran must be kept dry in moisture-proof containers, or the rehydrated bran will regain its lipase activity. If the bran is heated in the presence of moisture, the lipase is permanently denatured. 

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