| 摘要 |
After being mixed with a boric acid-based inorganic material, styrene beads are pre-formed and then left to age. Thereafter, a Styrofoam product (1) is produced by adding boric acid-based inorganic materials to the pre-formed beads and conducting a main expansion treatment. The surface of each foamed styrene bead (2) of the Styrofoam product (1) is covered by a coating film (3). If exposed to fire, the coating films (3) suppress burning of the styrene beads (2). In case a great quantity of heat is applied, the vitreous coats into which the coating films (3) have changed to prevent the styrene beads (2) from burning deeper. As the vitreous coats absorb black smoke, generation of black smoke is prevented.
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