Grade factors

Cure Characteristics. Methods of natural rubber production and raw material properties vary from factory to factory and area to area. Consequentiy, the cure characteristics of natural mbber can vary, even within a particular grade. Factors such as maturation, method and pH of coagulation, preservatives, dry mbber content and viscosity-stabilizing agents, eg, hydroxylamine-neutral sulfate, influence the cure characteristics of natural mbber. Therefore the consistency of cure for different grades of mbber is determined from compounds mixed to the ACSl formulation (27). The ACSl formulation is as follows natural mbber, 100 stearic acid, 0.5 zinc oxide, 6.0 sulfur, 3.5 and 2-mercaptobenzothiazole (MBT), 0.5. 

Maztech Microvisions Spy grain grader is an image analysis benchtop instrument that uses linear CCD arrays to determine objective grade and non-grade factors in grains and seeds [140]. 

Brumm, T.J. Quality and grading factors of IP soybeans. Managing Grain after Harvest C.J. Bern, T.J. Bern, Eds. Departmenr of Agriculrural and Biosystems Engineering, Iowa State University Ames, lA, 2004. 

Fig. 8.4. Effect of carbon content in various steei grades on heat absorption is shown by these grade factors used in the iast steps of tabie 8.3 (worksheet) for the Shannon Method for piotting steei heating curves. The peaks in this graph show the effect of the dramatic increase in heat absorption for steeis containing various percentages of carbon, C, during the crystaiiine phase changes between 1200 F and 1900 F (650 C and 1038 C). SS = stainless steel.

The anisotropic sintered form is by far the most important one. It is produced in various grades which can be divided into four main groups. Group is used for loudspeakers, where a high is essential, whereas a relatively low is acceptable. Groups F —are used for different types of motors, requiring quite distinct levels. In these cases a high is also desired, but in fact it is limited by the level and the performance factor K. 

Potassium Chloride. The principal ore encountered in the U.S. and Canadian mines is sylvinite [12174-64-0] a mechanical mixture of KCl and NaCl. Three beneficiation methods used for producing fertilizer grades of KCl ate thermal dissolution, heavy media separation, and flotation (qv). The choice of method depends on factors such as grade and type of ore, local energy sources, amount of clay present, and local fuel and water availabiUty and costs. 

Economic Market. The spice trade is controlled by many direct elements and responds slowly to supply and demand fluctuations. Resupply depends on growth to plant maturity, which for certain items, such as black pepper or nutmeg, can be several years. The raw material is directly affected by climate, adverse weather conditions, and control of plant diseases and insect and animal pests. Limited agricultural scientific advances are appHed to the cultivation of the botanicals, and there are many grades of product and degrees of quahty caused by different growing or processing conditions, sometimes by unknown factors as well. 

Grade 1—T1 Flex strength, MPa Water absorption, % Permittivity, 1 MHz Dissipation factor, 1 MHz Impact strength, J/m Dielectric breakdown parallel to laminations, kV... 

Grading, Measuring, and Shipping. Prior to shipment each hide, side, or skin is inspected and sorted. The grading is done on the basis of hide defects, shape of the skin, manufacturing defects, or any other factors of importance to the specifications of the sale. 

In practical terms, a company can foUow the trends ia its markets on a monthly or quarterly basis. Changes ia customer patterns ia terms of quantities, grades, or payment alert management to seek causative factors and take appropriate action. 

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