Molding lagging

Equipment operating schedules Confirm that the timing of occupied and unoccupied cycles is compatible with actual occupied periods, and that the building is flushed by the ventilation system before occupants arrive. ASHRAE 62-1989 provides guidance on lead and lag times for HVAC equipment. In hot, humid climates, ventilation may be needed during long unoccupied periods to prevent mold grow th. 

Rigid slabs, pipe sections, beveled lags and molded products. Also as a powder mix for use in wet cement form. 

Rigid slabs, pipe sections, beveled lags, molded products. 

Various types of lagging are available. The major advantage of its use is a considerable reduction in heat losses from both storage tanks and pipework. The materials most suitable for application to storage tanks are asbestos in the form of blankets or molded sections, glass silk blankets... 

In the manufacture of color master batches, the current industry practice is to perform eritieal color measurements off-line. Typically, a sample of the pelletized color concentrate is diluted with natural resin at a standard ratio and milled, extruded or injection molded into a physieal form suitable for visual and instrumental evaluation. These methods are slow and labor intensive. Furthermore, they do not lend themselves well to statistical process eontrol strategies because of the time lag between production and testing. Since relatively few samples can be examined, laboratory measurements may not give a true indication of the consistency of the concentrate product over the entire manufacturing process. 

The isothermal bulk crystalhzation of PLA was studied on a Du Pont thermal analyzer DSC 2920. Indium and aluminum were used for the cahbrahon of temperature and heat of fusion of the DSC unit, and liquid nitrogen was used as a coolant. The test sample was cut directly from the injection-molded impact bars. The sample weights used were maintained between 2 and 4 mg in order to minimize arty possible thermal lag. Each DSC heating cycle for the isothermal bulk crystalhzahon of PLA was composed of five steps as shown in Figure 1. Stage I the sample was heated from room temperature to 200°C at a heahng rate of 10°C/min. 

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