What is sintering and what are the consequences that can result from the process?
Sintering is the process whereby individual resin flakes slowly fuse together to form a solid mass. In essence, the flakes will melt together. This occurs under the influence of time, temperature, and pressure. One cannot control the passage of time, but one can control the temperature and storage conditions under which the resin is stored. Sintering does not cause the resin to change chemically. It still has the same Epoxide Equivalent Weight (EEW), softening point, and molecular weight. The flakes simply fuse together to form one, larger mass. This makes the resin more difficult to handle in the normal applications (e.g. powder coating and solvent-based protective coatings). In powder coatings, small flakes are required for mixing and extrusion with other solid components. For solvent-based protective coatings, the resin needs to be dissolved in an organic solvent. Both processes are more difficult to carry out if sintering has occurred. If sintering occurs in a 1000 kg (2200 lb) big
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