发明名称 |
PROCESS FOR MAKING FOAM-IN-FOAM POLYURETHANE FOAM BUNS, IMPROVED APPARATUS THEREFOR, AND TO FOAM-IN- FOAM ARTICLES OF MANUFACTURE |
摘要 |
An improved method for manufacturing a foam-filled polyurethane foam bun from foam particles having uniformly dispersed therewith large amounts of solid material bonded together with new polyurethane foam is described. The method comprises uniformly applying a liquid flexible polyurethane foam-forming material to a dispersion of foam particles and solid material to provide a blend, distributing the blend within a mold, and foaming and curing the foam-forming material by a plurality of steaming steps wherein the mold is flipped from a first to second position between steaming steps. The foam buns have a uniform density gradient. Foam buns are disclosed having a variation in density across the foam bun. There is also disclosed an improved char-forming foam obtained as a result of using boric acid in the foamforming formulation. |
申请公布号 |
CA1269198(A) |
申请公布日期 |
1990.05.15 |
申请号 |
CA19860500175 |
申请日期 |
1986.01.23 |
申请人 |
BURNETT (WM. T.) & CO., INC. |
发明人 |
BUCHANAN, MICHAEL S.;DAVIS, GREGORY B. |
分类号 |
B29B17/00;B29C44/04;B29C44/12;B29C67/20 |
主分类号 |
B29B17/00 |
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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