涤纶针刺滤料的 PTFE 乳液整理工艺探索

摘要

Two kinds of polyestcr needle-punched filter media with diflercnt density were finlshed by PTFE emulsion . The effects of eight different parameters in PTFE emulsion finishing process on permeability of two kinds of filter materials were studied , involving impergeating temperature , impregnation time , PTFE emulsion concentration , calendar pressure , pre-drying temperature and time , curing temperature and time.The optimum finishing process for the permeability of filter material with loose structure was as follows, the dip time was 15 min, the calendar pressure was 0.2 MPa, the pre-drying temperature was 100 ℃, the pre-drying time was 5 min, the curing remperature was 180 ℃, the curing time was 7 min.The optimum finishing process for the permeability of filter masterial with compact structure was as follows, the dip time was 15 min, the calendar pressure was 0.5 MPa, the pre-drying temperature was 80 ℃, the pre-drying tiem was 10 min, the curing temperature was 160 ℃, and the curing time was 3 min.%　　选择两种结构致密程度不同的涤纶针刺滤料，对其进行PTFE乳液整理，研究了浸渍温度、浸渍时间、PTFE乳液浓度、轧车压力、预烘温度、预烘时间、焙烘温度和焙烘时间八项工艺参数对滤料透气率的影响规律。正交优化试验结果显示：可以使结构疏松滤料透气率变化率最大的工艺为浸渍时间15 min，轧车压力0．2 MPa，预烘温度100℃，预烘时间5 min，焙烘温度180℃，焙烘时间7 min；可以使结构致密滤料透气率变化率最大的整理工艺为浸渍时间15 min，轧车压力0．5 MPa，预烘温度80℃，预烘时间10 min，焙烘温度160℃，焙烘时间3 min。