Abstract: A porous ceramic for which any decrease in water permeability can be suppressed over a long period of time. A porous ceramic is composed of a porous ceramic sintered body produced by molding and sintering a mixture containing a clay, wherein a surface portion of the porous ceramic sintered body has been removed by grinding. The mixture preferably contains a foaming agent.

Abstract: To solve problems of perlite, zeolite and vermiculite which have been conventionally used as soil improving materials, and to provide a soil improving material which has excellent water retaining properties and is well-drained to retain air in a soil to thus make a soil suitable for plant growth, and a culture soil containing the soil improving material. The soil improving material of the invention includes porous ceramic particles having a moisture content of 5 vol % or greater at a pF value of not more than 2.7. The particles preferably have a water retaining ratio of 15% or greater. The particles preferably have a saturated hydraulic conductivity of 0.1 cm/s or greater.

Abstract: In a glove manufacturing device, a glove insert with thermoplastic adhesive applied on the outer side is fixed on a glove holding member in a state where it has been inserted into the inner side of the outer material of the glove. The glove insert is then expanded by way of a gas injection means, and the outer material of the glove and the glove insert are bonded. The glove holding member is fixed on the turntable and sent to a heating furnace by this rotating.

Abstract: A porous ceramic for which any decrease in water permeability can be suppressed over a long period of time. A porous ceramic is composed of a porous ceramic sintered body produced by molding and sintering a mixture containing a clay, wherein a surface portion of the porous ceramic sintered body has been removed by grinding. The mixture preferably contains a foaming agent.

Abstract: In a glove manufacturing device, a glove insert with thermoplastic adhesive applied on the outer side is fixed on a glove holding member in a state where it has been inserted into the inner side of the outer material of the glove. The glove insert is then expanded by way of a gas injection means, and the outer material of the glove and the glove insert are bonded. The glove holding member is fixed on the turntable and sent to a heating furnace by this rotating.