Process for the preparation of porous material
OwnerKlaus Draenertinventor
Life of this patent
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Abstract
A process is disclosed for producing a positive-material with a skeleton made of shell-like structures and an interconnecting pore system designed between the skeleton structures. Also disclosed is a process for producing a negative-material made of shaped bodies interconnected by bridges a process for producing a positive/negative-material, materials produced by this process and their use as bone replacement materials, implants, filters and drug delivery systems. According to this process deformable shaped bodies in bulk are poured into a mold that forms a negative model of the material.
Claims18
A process for the preparation of a material with a framework made of shell-like structures and an interconnecting pore system, comprising the following process steps:
- (a) filling deformable shaped bodies into a mold for forming a bulk of the deformable shaped bodies with the bodies in contact with other bodies, the mold comprising removable space retainers in the mold,
- (b) filling the mold with castable, extrudable or pourable material and solidifying the material, and successively extracting the space retainers from the mold while the mold is filled with the castable, extrudable or pourable material, wherein the space provided by extracting the space retainers is filled with the material so that massive portions are formed with the solidified material, and
- (c) removing the deformable shaped bodies, wherein the material forms the framework of shell-like structures with an interconnecting pore system.
A process for the preparation of a material made of shaped bodies connected via webs, comprising the following process steps:
- (a) filling deformable shaped bodies into a mold for forming a bulk of the deformable shaped bodies, the mold including removable space retainers,
- (b) filling the mold with a castable, extrudable or pourable material and solidifying the material, removing the space retainers so cavities are formed in the material in the spaces where there were space retainers,
- (c) removing the deformable shaped bodies, wherein the material forms a framework of shell-like structures,
- (d) filling a castable, extrudable or pourable material into the framework, which material takes up the space first taken up by the shaped bodies, and solidifying the material,
- (e) removing the framework material, wherein the material consisting of shaped bodies connected via webs is left.
A process for the preparation of a material with a framework made of shell-like structures and an interconnecting pore system, comprising the following process steps:
- (a) filling deformable shaped bodies into a mold for forming a bulk of the deformable shaped bodies with the bodies in contact with other bodies,
- (b) filling the mold with castable, extrudable or pourable material and solidifying the material, the filling step causing the bodies to be deformed against one another by pressure occurring during filling the material into the mold, and
- (c) removing the deformed bodies from the solidified material, wherein the solidified material forms the framework of shell-like structures with an interconnecting pore system.
A process for the preparation of a material with a framework made of shell-like structures and an interconnecting pore system, comprising the following process steps:
- (a) filling deformable shaped bodies into a mold for forming a bulk of the deformable shaped bodies with the bodies in contact with other bodies,
- (b) filling the mold with castable, extrudable or pourable material and solidifying the material, an end portion on at least one end of the mold being completely filled with the material so that the end portion forms a non-porous portion of the finished material, and
- (c) removing the deformable shaped bodies from the solidified material, wherein the solidified material forms the framework of shell-like structures with an interconnecting pore system.
Dependencies are inferred from the claim text.