Title:
MANUFACTURE OF ROOFING TILE
Document Type and Number:
Japanese Patent JP3892504
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable use of an inorganic material having insufficient plasticity as a roofing tile raw material and to reduce weight of the tile while maintaining its strength by mixing a gel of water-swellable water absorbing resin (component (a)) contg. absorbed water with a roofing tile raw material, forming the resulting mixture into a formed body and firing the formed body, in the manufacture.
SOLUTION: In this manufacture, the component (a) used has a 100 to 1,000g/g water absorbency with respect to pure water and is a powdery or particulate material having a 5 to 550μm average particle size, and also preferably, the gel used of the component (a) has 10,000 to 50,000dyne/cm2 gel strength. The component (a) is obtained by subjecting e.g. starch or cellulose, a water-soluble monomer having a hydrophilic group such as carboxyl or sulfonic acid group and/or a monomer capable of becoming water-soluble by hydrolyzing it and a crosslinking agent, each of which is used as an essential polymerization reactant, to polymerization and, if necessary, further hydrolyzing the resulting polymer. As the roofing tile raw material, clay or a plastic ceramic powder can be used and, moreover, a nonplastic material or low plasticity material, each of which is unsuitable for manufacturing a roofing tile, (such as gairome clay (occurs in Japan), silica sand or waste incineration ash), alone or as a mixture of it with another plastic material, can also be used.
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Inventors:
Kumano Kazuhiro
Hiraiwa Kunihiko
Yukio Senya
Yoji Fujiura
Fumihide Genjida
Hiraiwa Kunihiko
Yukio Senya
Yoji Fujiura
Fumihide Genjida
Application Number:
JP23252296A
Publication Date:
March 14, 2007
Filing Date:
August 13, 1996
Export Citation:
Assignee:
SANYO CHEMICAL INDUSTRIES,LTD.
International Classes:
C04B35/632; E04D1/00; C04B33/13; (IPC1-7): C04B35/632; E04D1/00
Domestic Patent References:
| JP8073282A | ||||
| JP2133356A |
Attorney, Agent or Firm:
Masayuki Yano