Process for preparing superabsorbent-containing composites
First Claim
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1. A process for preparing a superabsorbent-containing composite, the process comprising the steps of:
- (a) introducing at least one particle of at least one coating material into a flowing gas stream, the flowing gas stream moving the coating material through a zone where an association agent is applied to the coating material;
(b) introducing at least one particle of at least one superabsorbent material into the flowing gas stream; and
(c) thereafter maintaining the flowing gas stream until the superabsorbent material is covered with at least a first layer of the coating material, the coating material being in intimate association with and covering the surface of the superabsorbent material.
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Abstract
Superabsorbent-containing composites prepared in a fluidized bed coating apparatus according to the process of the present invention contain at least one particle of a superabsorbent material covered with at least a first layer of at least one particle of at least one coating material. The superabsorbent-containing composites prepared in a fluidized bed coating apparatus according to the process of the present invention are particularly suitable for use in sanitary napkins, diapers and other disposable absorbent articles that handle complex fluids.
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Citations
42 Claims
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1. A process for preparing a superabsorbent-containing composite, the process comprising the steps of:
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(a) introducing at least one particle of at least one coating material into a flowing gas stream, the flowing gas stream moving the coating material through a zone where an association agent is applied to the coating material;
(b) introducing at least one particle of at least one superabsorbent material into the flowing gas stream; and
(c) thereafter maintaining the flowing gas stream until the superabsorbent material is covered with at least a first layer of the coating material, the coating material being in intimate association with and covering the surface of the superabsorbent material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A process for preparing a superabsorbent-containing composite, the process comprising the steps of:
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(a) introducing at least one particle of at least one superabsorbent material into a flowing gas stream, the flowing gas stream moving the superabsorbent material through a zone where an association agent is applied to the superabsorbent material;
(b) introducing at least one particle of at least one coating material into the flowing gas stream; and
(c) thereafter maintaining the flowing gas stream until the superabsorbent material is covered with at least a first layer of the coating material, the coating material being in intimate association with and covering the surface of the superabsorbent material. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A process for preparing a superabsorbent-containing composite, the process comprising the steps of:
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(a) introducing at least one particle of at least one superabsorbent material and at least one particle of at least one coating material into a flowing gas stream, the flowing gas stream moving the superabsorbent material and the coating material through a zone where an association agent is applied to the superabsorbent material and the coating material; and
(b) thereafter maintaining the flowing gas stream until the superabsorbent material is covered with at least a first layer of the coating material, the coating material being in intimate association with and covering the surface of the superabsorbent material. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification