Dic Corporation

Dainippon Ink and Chemicals, Incorporated

Kitz Sct Corporation

Toshikazu Suganuma

Kazunari Sakai

Youhei Suganuma

Shigeaki Fujieda

Misao Takeuchi

Kouji Kawase

Yasushi Tomita

Naoki Hada

Katsuhiko Kazama

A process for manufacturing a deaerating hollow fiber module with no core, including the steps of wrapping a sheet containing a multiplicity of hollow fibers around a temporary core; retaining in tubular form the sheet wrapped around the temporary core; and removing the temporary core from the sheet retained in tubular form.

Process for manufacturing deaerating hollow fiber module

There is provided a liquid supply method in which, when preparing a solution that can be used as washing water and the like by supplying a minute amount of chemicals and the like to ultrapure water, the amount of supply solution that is supplied can be accurately determined. In this liquid supply method, a solution is prepared by supplying a supply liquid to a primary fluid that is circulating in a primary fluid circulation tube (). This liquid supply method uses a liquid supply apparatus () that includes: a supply section () that delivers the supply liquid; and a supply liquid circulation tube () that causes the supply liquid to flow from the supply section () to the primary fluid circulation tube (), the internal diameter of the supply liquid circulation tube () being between 0.01 and 1 mm. When the supply solution is supplied from the supply section () to the primary fluid circulation tube () via the supply liquid circulation tube (), a pressure P1 of the supply liquid in the supply section () and a pressure P2 of the primary fluid in the primary fluid circulation tube satisfy the formula P&#x2212;P.

Liquid supply method and apparatus

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Chiba, Japan

Toshikazu Suganuma