Glossary of Terms and Acronyms H Hammermill A high-speed machine used predominately for processing wire free tire rubber that has been frozen. The machine consists of rotating hammers that impact material at high velocity against a grate. The hammer size, speed and velocity as well as the openings between the grates control the size of the rubber produced. A hammermill is best suited for reducing tire rubber from 1 inch (25MM) and below sizes down to 100 mesh. Hauler Those persons, firms, corporations, or governmental agencies responsible (under oral or written contract, or otherwise and licensed if required) for the collection of take-off tires, whole scrap tires, or rubber materials within the geographic boundaries of the contract community(s), and the transportation of such materials to sorting stations, recycling centers or end markets. Hysteresis Measure of energy loss expressed in degree of temperature build up. I Infrastructure The general term for the basic physical systems of a business, region, or nation. Examples include transportation systems, communication networks, sewage, water, and electric systems. These systems tend to be capital intensive and high-cost investments and are vital to a country's economic development and prosperity. Injection Molding process by which a rubber compound is forced into a closed mold by pressure other than the mold clamping force. International System of Units (SI) SI is the modern form of metric units. The values stated in SI units are regarded as standard in the ASTM designated standards. Other units of measurements are considered as informational in ASTM Standards. See Appendix B Table 1 (Conversion of Metric Units to U.S. Standard Units Shortcut) and Table 2 (Metric Unit Symbol, Name and Description and/or Quantity). J
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