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MATERIAL OF FIN FOR HEAT EXCHANGER AND SURFACE TREATING AGENT THEREFOR
MATERIAL OF FIN FOR HEAT EXCHANGER AND SURFACE TREATING AGENT THEREFOR
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机译：用于换热和表面处理的翅片材料
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摘要
PROBLEM TO BE SOLVED: To ensure excellent hydrophilicity by forming a film of specified resin composition on the opposite sides of a thin aluminum plate constituting the fin of a heat exchanger and to suppress abrasion of a die at the time of pressing the thin aluminum plate by forming a soft film containing no silica component. ;SOLUTION: A surface treatment agent for the fin material of an aluminum heat exchanger is prepared by adding polyvinyl alcohol containing a vinyl alcohol unit, a vinyl unit containing an epoxy group, and an aliphatic vinyl ester unit. Polymerization degree of polyvinyl alcohol is set at 300-3300, saponification degree is set at 90% or above, and the vinyl unit containing an epoxy group is set at 0.2-12 mol. An aqueous polymer of such a surface treatment agent is applied onto the surface of an aluminum tin material and dried to form a film on the surface of the fin material of a heat exchanger thus eliminating the problem of abrasion of a die at the time of press work.;COPYRIGHT: (C)1999,JPO
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