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Seam efficiency

Seam strength is often referred to as seam efficiency, which is an expression of seam strength as a function of fabric strength. [Pg.124]

It is desirable that the sewing thread, rather than the fabric yams, should break, because the seam can be restitched. The durabihty of a seam depends largely on its strength and the elasticity of the material, and it is expressed in terms of seam efficiency ... [Pg.71]

The seam strength of a GTX is mainly relevant for bags or containers made of GTX-N or GTX-W in marine applications or for containers for the dewatering of slurry Ailed in containers. The seam efficiency shall be sufficient to be able to withstand the loads, eg, when the container or bag will be dropped into the sea. For such products the seam strength is an essential characteristic (Table 7.5 and Fig. 7.7). [Pg.127]

Strain rate (20 5)%Lo/nun (if seam efficiency has to be determined, test speed must be identical with test without seam) (10 3)%Lo/min... [Pg.128]

BEOs are most often used for point sources or small line or surface sources. See Chapter 7 for descriptions of sources. BEOs are sometimes used for lines or surfaces when the source is moving along the line or on the surface. This naturally demands the exhaust to move with (or be moved with) the source movements (e.g., during painting or seam welding). They have also been used for side suction from baths and tanks-- and these exhausts are usually called rim exhausts see Rim Exhausts. However, for these sources push-pull systems (Section 10.4.3) are often more efficient. Side hoods can also be used, e.g., when molten metal is poured however, in these cases an enclosed exhaust is more efficient. [Pg.828]

The In-sltu coal gasification simulator appears to behave much like an underground coal seam undergoing gasification, and yields typical gas at rates and efficiencies very similar to those observed In field tests. At times. It even posed similar control problems, such as locating the combustion face, gas leakage and self re-lgnltlon. [Pg.94]

Thus, there appears to be something unique about the weakly acidic phenolic materials. In addition to phenol itself, 3,5-xylenol, 2-naphthol, phenol-naphthalene (1 1). and cresylic acid all show ability to solubilize the coal. Recently, Darlage and Bailey have studied the phenol catalyzed depolymerization of a Kentucky coal (Pond Creek Seam, Pike County). (16) This coal does not depolymerize efficiently and would compare with the poorest coals tested with data shown in Table II. These authors also show that phenolic solvents in general cause solvation of coal whereas non-phenolic aromatics add to coal but do not solubilize the coal. [Pg.432]

In-situ leaching in the seams themselves proceeds with sulfuric acid or carbonate solutions. The leaching agent is fed in via injection tubes into the rock seam and brought to the surface via a central tube. In situ uranium leaching efficiency is 60 to 85%. Currently ca. 5000 t of uranium are extracted in this way. [Pg.601]

In addition to the analysis of the topology of a conical intersection, the quadratic expansion of the Hamiltonian matrix can be used as a new practical method to generate a subspace of active coordinates for quantum dynamics calculations. The cost of quantum dynamics simulations grows quickly with the number of nuclear degrees of freedom, and quantum dynamics simulations are often performed within a subspace of active coordinates (see, e.g., [46-50]). In this section we describe a method which enables the a priori selection of these important coordinates for a photochemical reaction. Directions that reduce the adiabatic energy difference are expected to lead faster to the conical intersection seam and will be called photoactive modes . The efficiency of quantum dynamics run in the subspace of these reduced coordinates will be illustrated with the photochemistry of benzene [31,51-53]. [Pg.184]

Use Rapid and efficient bonding of low-strength materials, e.g., bookbinding, food cartons, side-seaming of cans, miscellaneous packaging applications. [Pg.25]

Carbonization. When coal is heated to temperatures 900 to 1200°C in the absence of air, most of the volatile matter is driven off, leaving a char, or, in the case of metallurgical bituminous coal, a coke. The atmosphere in a coke oven consists principally of hydrogen and methane. Consequently, pyrite is reduced to a mixture of iron sulfide (troilite and pyrrhotite) and iron metal [ ]. The amount of iron metal formed depends on both the temperature and the composition of the coke-oven gas. The reduction of iron sulfide to iron metal is desirable since blast furnace operation is more efficient with low sulfur coke. Calcite reacts with the liberated sulfur to form calcium sulfate, thus retaining sulfur in the coke. Calcium XANES spectra of coke produced from Pittsburgh seam coal in which all calcium is initially present as calcite indicate that approximately 70 percent of the calcite is converted to calcium sulfate during coking. [Pg.109]


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See also in sourсe #XX -- [ Pg.71 ]




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