Interior enamels

Figure 1 also includes previously reported values for H and E for comparison with the mechanical property maps of Cuy et al. [12]. It is clear that nanoindentation is able to sense a much wider variation in these properties than previously observed. This is at least partially because the past investigations of mechanical properties yielded mainly average values of H and E that correspond to the values for the interior enamel. Many of these previous studies did not show the extreme local variations that can be measured with nanoindentation. Only the earlier nanoindentation studies have shown any evidence for the highest E and El found by Cuy et al. [12] using nanoindentation. Willems et al. [3] reported E = 90.59 16.13 GPa and Mahoney et al. [21] reported H = 4.88 0.35 GPa. 

Lithopone 3-Methoxy-1-propanol PEG-6 trimethylolpropane Silica, hydrated flow aid, acrylic food packaging s-Dioctyl phthalate flow aid, alkyd interior enamels Borosilicate glass flow aid, alkyd resin/oil paints Butyl glycolate... 

VOC reducer, alkyd interior enamels Borosilicate glass... 

U.S. MiHtary Specification DOD-E-24607, Enamel, Interior, Nonflaming, Chlorinated Alkyd Kesin, Semigloss, Oct. 13, 1981. 

Epoxy ester Epoxy esters are a type of alkyd where a high molecular weight resin is reacted with alkyd resin. The curing mechanism remains primarily through the oil-oxidation reaction and their properties are in no way similar to the chemically reacted epoxies. They have similar properties to alkyds although with improved chemical resistance but inferior appearance. They form a reasonably hard, oil-resistant coating, which can sometimes be suitable for machinery enamels, but are primarily for interior use, since they tend to chalk rapidly on exteriors. Their best use is for chemical or water resistance where circumstances dictate that finishes that are more superior cannot be used. 

The interior surface finish, to comply with EEC and other health standards, must be rustproof, cleanable, and free from any crevices which can hold dirt. Bare timber in any form is not permitted. Most liners are now aluminium or galvanized steel sheet, finished white with a synthetic enamel or plastic coating. GRP liners are also in use. Floors are of hard concrete or tiles. Very heavy working floors may have metal grids let into the concrete surface. Floor concrete is coved up at the base of the walls to form a protective curb. 

There are several disadvantages to drawn and ironed cans for foods. The D I can is used only with products suitable for enameled cans since there is not enough tin on the interior surface of a plain D I can to provide cathodic protection to the large area of steel exposed through the ironed tin surface. 

Fish and Shellfish. Sardines in oil and also in tomato sauce and mustard sauce are packed commercially in enameled aluminum cans. However, tomato and mustard sauces are corrosive products that can attack metal containers. Sardines prepared in these sauces should not exceed 3.0% total acidity, expressed as acetic acid. Otherwise, the presently used interior can enamels will not protect the food sufficiently to prevent chemical reactions with the metal. 

Construction materials must be nonabsorbent and easily cleaned or decontaminated. Seamless flooring avoids cracks from which spilled chemicals can contribute a significant pollution burden to the laboratory air. Epoxy paint should be used for interior walls. Dropped ceilings should be made of nonabsorbent material such as enameled metal. Hoods and sinks should be fabricated of stainless steel. Wood or other porous surfaces must be avoided. 

Figure 13.1 shows the structure of a tooth, which relies on the integrity of the hard enamel external layer to protect the vulnerable interior. 

Kelly-Moore Enviro-Coat Enamel No i5.io/gallon kellymoore.com 650-595-1654 Interior... 

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