Composition for use in sintered molded bodies and sintered molded body
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsMotohiro Fukai, Kuon Miyazaki
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Abstract
An object of the present disclosure is to provide a composition for use in sintered molded bodies which does not impair the shape retention ability of a green molded body relying on the rigidity inherent to a polyacetal resin, has high fluidity, and is resistant to cracking or swelling during degreasing. The composition for use in sintered molded bodies contains a sinterable inorganic powder and an organic binder, the organic binder contains at least a polyacetal resin and a polyolefin resin, and the melt flow index of the polyacetal resin is 70 to 200 g/10 min.
Claims20
A composition for producing sintered molded bodies by acid degreasing to remove a binder from green molded bodies comprising:
- a sinterable metal powder and an organic binder,
- wherein the organic binder comprises at least a polyacetal resin and a polyolefin resin,
- a melt flow index of the polyacetal resin is 70 to 200 g/10 min,
- the polyolefin resin is selected from a group consisting of polyethylene, polypropylene, and mixtures thereof, and
- a mass ratio of the polyolefin resin with respect to 100 parts by mass of the polyacetal resin is 10 to 200 parts by mass.
A composition for producing sintered molded bodies by thermal degreasing to remove a binder from green molded bodies comprising:
- a sinterable metal powder and an organic binder,
- wherein the organic binder comprises at least a polyacetal resin and a polyolefin resin,
- a melt flow index of the polyacetal resin is 70 to 200 g/10 min, and
- a mass ratio of the polyacetal resin in the organic binder is 5 to 45% by mass with respect to 100% by mass of the organic binder.
Dependencies are inferred from the claim text.