PRECOAT FIN MATERIAL AND ITS MANUFACTURING METHOD

To provide a precoat fin material which can be manufactured by a simple process, and is excellent in corrosion resistance and hydrophilicity, and its manufacturing method.SOLUTION: A precoat fin material 1 has a base material 2 and a resin membrane 3 formed on the base material 2. A mass of the resi...

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Bibliographische Detailangaben
Hauptverfasser: FUJIMURA RYOKO, OGIWARA KANA, TOMIMORI TAKESHI, SHIMIZU KEIICHI, KOYAMA TAKAHIRO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a precoat fin material which can be manufactured by a simple process, and is excellent in corrosion resistance and hydrophilicity, and its manufacturing method.SOLUTION: A precoat fin material 1 has a base material 2 and a resin membrane 3 formed on the base material 2. A mass of the resin membrane 3 per unit area is equal to or larger than 0.2 g/m2 and equal to or smaller than 2.5 g/m2. The precoat fin material 1 has a feature that an average value up to a one-hour lapse time point from a natural potential measurement start point which is measured in a 5-mass% NaCl water solution of pH3 becomes equal to or larger than +0.040 V and equal to or smaller than +0.2 V with respect to an average value of the natural potential of the base material 2, and a water contact angle after being immersed in flowing water for 10 min becomes equal to or larger than 20° and equal to or smaller than 40°. The resin membrane 3 contains a specified hydrophilic polymer (A) and a cross-linking agent (B), and a content of the polymer (A) is equal to or larger than 60 parts by mass and equal to or smaller than 97 parts by mass with respect to total 100 parts by mass in a total of the hydrophilic polymer (A) and the cross-linking agent (B).SELECTED DRAWING: Figure 1 【課題】簡素な工程で製造することができ、耐食性及び親水性に優れたプレコートフィン材及びその製造方法を提供する。【解決手段】プレコートフィン材1は、基材2と、基材2上に設けられた樹脂皮膜3とを有している。樹脂皮膜3の単位面積当たりの質量は0.2g/m2以上2.5g/m2以下である。プレコートフィン材1は、pH3の5質量%NaCl水溶液中で測定した自然電位の測定開始時点から1時間経過時点までの平均値が、基材2の自然電位の平均値に対して+0.040V以上+0.2V以下となり、流水に10分間浸漬した後の水の接触角が20°以上40°以下となる特性を有している。樹脂皮膜3は、特定の親水性重合体(A)と架橋剤(B)とを含有しており、親水性重合体(A)の含有量は、親水性重合体(A)と前記架橋剤(B)との合計100質量部に対して60質量部以上97質量部以下である。【選択図】図1