THE MAKING METHOD OF MULTILAYER POROUS FORMATION BODY FOR HUMIDITY CONTROL WITH IMPROVED AIR ENVIRONMENT OF INTERIOR

摘要

Provided is a method for manufacturing a formed multi-layered porous body, wherein the formed body is improved in moisture-absorbing and waterproof performances and has improved humidity-control ability and excellent soundproof and heat-retaining effects. The method for manufacturing a formed multi-layered porous body comprises the steps of: preparing hydrophobic powder containing one, two or more hydrophobic mineral powder(particle size: 325-500mesh), preparing hydrophilic powder containing one, two or more hydrophilic mineral powder(particle size of 50-500mesh), and adding water to a mixture of the hydrophobic powder and hydrophilic powder to prepare liquid slip; providing a mold formed of a water-absorbing member having a large water absorptivity, putting the liquid slip into the mold to make the hydrophobic powder and the smaller hydrophilic powder placed near the water-absorbing member, and drying the liquid slip to form a dried body; and removing the mold from the dried body; and firing the dried body.