| 摘要 |
A plurality of nonflammable, heat sensitive organic fibers are intimately admixed by blending with inorganic fibrous materials such as glass wool, mineral wool and asbestos fibers. The admixture of the organic and inorganic fibers is processed by carding or garnetting to form an insulating composite body of a preselected thickness. The nonflammable, heat sensitive fibers, such as polyester fibers, may be oriented within the composite body by a needling process to interlock the inorganic fibers and compress the composite body to cohesively bind the fibers in a batting. This prevents the composite body from splitting and also serves to decrease the thickness and increase the density of the composite body. The interlocked arrangement of heat sensitive organic fibers and inorganic fibrous material is subjected to a shrinking treatment at a temperature in the range between about 212 DEG to 300 DEG F. for a preselected time interval. The heat sensitive, organic fibers contract at the elevated temperature and bind the inorganic fibers together to form a composite insulating material having a tensile strength sufficient to prevent splitting of the fibrous materials and economically fabricated without material waste or generation of pollutants.
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