发明名称 |
Rebond foam and process for production thereof |
摘要 |
A rebond foam comprising a plurality of isocyanate-based polymeric foam pieces bonded to one another with an isocyanate-based binder is disclosed. A superabsorbent material is comprised in one or both of the isocyanate-based polymeric foam pieces and the isocyanate-based binder. The rebond foam is capable of: (i) absorbing at least about 5 times its weight of a 0.9 wt./wt. % aqueous NaCl solution maintained at a temperature of from about 20 DEG to about 25 DEG C., and (ii) retaining at least about 5 times its weight of absorbed aqueous NaCl solution which is bound to the superabsorbent material. A process for producing a rebond foam is also disclosed. The process comprises the steps of: (i) mixing a plurality of isocyanate-based foam pieces with a binder comprising an isocyanate and an active hydrogen-containing compounds to form a mixture, a superabsorbent material being comprised in one or both of the isocyanate-based polymeric foam pieces and the isocyanate-based binder; (ii) placing the mixture in a mold; (iii) compressing the mixture in the mold; (iv) reacting the isocyanate and the active hydrogen-containing compound; (v) bonding the isocyanate-based foam pieces to one another to form the rebond foam. The rebond foam is useful as applications where fluid absorption and retention is desirable (e.g. personal hygiene devices, etc.).
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申请公布号 |
US5817703(A) |
申请公布日期 |
1998.10.06 |
申请号 |
US19960723308 |
申请日期 |
1996.09.30 |
申请人 |
WOODBRIDGE FOAM CORPORATION |
发明人 |
BLAIR, G. RONALD;ATTFIELD, HAROLD R.;WILSON, ROBERT N. |
分类号 |
A61L15/22;A61L15/26;A61L15/42;C08J9/35;(IPC1-7):C08J9/236 |
主分类号 |
A61L15/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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