| 摘要 |
PURPOSE: A fire retardant resin for the impregnation of timber is provided to produce a timber which accords with the fire retardancy performance criteria while saving a temperature and humidity adjusting function and the scent of the natural timber. CONSTITUTION: A manufacturing method of a fire retardant resin comprises: a step that transfers a dried timber to a vacuum chamber(S1); a step that injects the resin for the impregnation of timber maintaining a vacuum state depressurizing the vacuum chamber(S2); a step that impregnates the resin in the timber by applying certain pressure to the vacuum chamber filled with the resin for the impregnation of a timber(S3); and a step that dries a resin impregnated timber(S4). The dried timber has the water content within 15%. The resin for the impregnation of timber includes water, water soluble fire retardant material and water soluble glycol class. the water soluble fire retardant material is one or more of the fire retardant material among guanidine system, boric acid group and phosphoric acid group fire retardant material. The resin for the impregnation of timber has 10-70 parts by weight of the water soluble fire retardant material and 1-10 parts by weight of ethylenglycol toward 100 parts by weight of water. The resin for the impregnation of timber has 5-25 parts by weight of phosphoric acid, 5-45 parts by weight of poly phosphoric ammonium and 1-3 parts by weight of ethyleneglycol toward 100 parts by weight of water as the water soluble fire retardant material. The applied pressure in the vacuum chamber maintains over 15 kilogram per square centimeter. The contents impregnated in the timber by the impregnation step is over 40 kilogram per square meter. The drying step dries the timber in the low temperature below 100 degree C. [Reference numerals] (S1) Dried timber transferring step; (S2) Timber impregnating resin injecting step; (S3) Timber impregnating resin impregnating step; (S4) Timber drying step |
