MANUFACTURING METHOD OF DIFFUSER MEMBRANE FOR IMPROVED ELASTICITY AND DURABILITY AND HIGH EFFICIENCY DIFFUSER MEMBRANE USING THEREOF

摘要

PURPOSE: A manufacturing method of a disc type air diffuser membrane and a high efficiency air diffuser membrane are provided to have increased elasticity and workability ; have a reduced content amount of low molecular weight compounds, such as process oil and/or plasticizer; and have increased durability by preventing the aging of products due to leaching of low molecular weight compounds for long term use of the air diffuser membrane. CONSTITUTION: A manufacturing method of a disc type air diffuser includes the step of cross-linking air diffuser membrane compounds, which includes an ethylene-propylene-diene copolymer and/or process oil to satisfy the condition of equation 1. In formula 1, NE ND, NE is a degree of cross-linking drawn from the edge area of a disk type diffuser membrane, and ND is a degree of cross-linking drawn from the disk part of the disk type diffuser membrane. In a cross-linking stage, the edge part has a cross-linking with an angle ranging from 280 to 320 degrees C, and a disc part has a cross-linking with an angle ranging from 230 to 260 degrees C. A cross-linking stage maintains a pressure of 3.2-4.0 MPa for 10-60 minutes.