| 摘要 |
<p>An intumescent strip (1) for fireproofing doors and the like comprises an elongate carrier (2) defining an internal cavity (3) containing an elongate insert (4) of intumescent material. The strip (1) is made by extruding the carrier (2) from molten plastics material to define the internal cavity (3), extruding the insert (4) of flexible intumescent material into the cavity, and cooling the extruded components (2, 4) to form a solid carrier with the intumescent insert in the cavity. The carrier (2) and insert (4) are preferably co-extruded, and cooled by a former (14) and water tank (15).</p> |
