Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles
Patent
1998-07-15
2000-06-27
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
26417711, 26417712, 264630, 264631, 264669, 264670, 419 65, 419 67, C04B 35632
Patent
active
060803452
ABSTRACT:
Powder mixtures and a method of forming and shaping the mixtures. The method involves compounding the components of powder materials, binder, solvent for the binder, surfactant, and non-solvent with respect to at least the binder, the solvent, and the powder materials. The non-solvent is lower in viscosity than the binder combined with the solvent. The solvent is present in an amount that is less than the amount that would be present otherwise. The components are mixed and plasticized, and shaped to form a green body. The choice of components results in improved wet green strength in the green body. The method is especially useful for extrusion processing of aqueous binder systems such as water and cellulose ethers and hydrophobic non-solvents, to form structures such as honeycombs. In the body, the ratio, upon subsequent firing, of the isostatic strength to the A-axis strength is at least about 20% higher than in bodies made without the mixture composition of the invention. A honeycomb body having a ratio of the isostatic strength to the A-axis strength of at least about 0.33 upon firing.
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Chalasani Devi
Fischer Michael
Malarkey Christopher J.
McCarthy Kevin R.
Stutts Brian E.
Corning Incorporated
Derrington James
Herzfeld L. Rita
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