蒸汽噴射熱壓法製造粒片板及耐燃粒片板之性質

Properties of Fire-retardancy of Nontreated and Treated Particleboard Manufacturing by Steam-injection Pressing

黃耀富(Yaw-Fuh Huang) ； 江吉龍(Chi-Lung Chiang)

《林產工業》 17卷2期 (1998/06) Pp. 345-358

https://doi.org/10.6561/FPI.1998.17(2).8

摘要

本研究分為兩部份，第一部份採用柳杉粒片原料，將粒片絕乾量8%之水溶性酚甲醛樹脂膠合劑佈膠後，熱壓時以熱板溫度150℃、初期噴射蒸氣壓6 kgf/cm^2及初期熱壓壓力30 kgf/cm^2的蒸汽噴射熱壓條件，製成不同製板厚度15、20、30、40、50 mm與不同製板密度0.6、0.7、0.8 g/cm^3之粒片板；第二部份採用柳杉與相思樹等粒片原料，分別浸漬10、20、30%濃度之市售立安302型與天液耐燃藥劑兩小時，取出經乾燥後，依粒片絕乾量8%之水溶性酚甲醛樹脂膠合劑佈膠，並以相同的蒸汽噴射熱壓條件製成密度0.7 g/cm^3、板厚15 mm之耐燃粒片板。蒸汽噴射熱壓法製造粒片板，隨製板厚度之增加，不但可縮短傳統熱板熱壓法之熱壓時間，而且成板厚度方向的密度剖面分佈較均勻，吸水厚度膨脹率亦降低，同時比靜曲破壞強度、比靜曲彈性係數、內聚強度以及木螺絲保持力均獲得良好的改善效果。蒸汽噴射熱壓法製造耐燃粒片板，因受浸漬耐燃藥劑之影響均有明顯降低各成板的理學、力學性質，尤以浸漬耐燃藥劑濃度較高者降低情形明顯；耐燃效果亦隨浸漬耐燃藥劑濃度較高者可獲得較大的改善效果，但其中以耐燃藥劑濃度30%處理者，方能符合CNS 6532『建築物室內裝修材料之耐燃性試驗法』所規範之耐燃3級標準。

關鍵字

蒸汽噴射熱壓法 ； 傳統熱板熱壓法 ； 粒片板 ； 耐燃性

並列摘要

This study consists of two groups of particleboard comprising of fire-retardants treated or not treated particles and fabricated by steam-injection hotpressing. Japanese ceder (Cryptomeria japonica) was used as raw material for wood particles in first group. The designated thickness of boards were 15, 20, 30, 40 and 50 mm, and density of boards were 0.6, 0.7 and 0.8 g/cm^3. In the other group, Taiwan acacia (Acacia confusa) and Japanese ceder were used as raw material for wood particles. The wood particles were impregnated with two kinds of commercial fire-retardants under the concentration of 10, 20 and 30% for two hours. The designated thickness and density of boards assigned were 15 mm and 0.7 g/cm^3, respectively. All boards bonded with water soluble type of PF resin by 8% based on the weight of oven-dried particle, then pressed at 150℃ with electric heating and 6 kgf/cm^2 saturation steam pressure (about 160℃)with steam injected in hotplaten under an initial pressure of 30 kgf/cm^2 for the curing. The nontreated boards showed the markedly shortened press time, uniform distribution of density profile, better physical and mechenical properties as compared to those of conventional hot pressed boards with an increase in the thickness of boards. The performance of physical and mechenical properties for the fire-retardants treated boards were reduced, and fire-retardancy improved with an increase in the impregnated concentration of fire-retardants as compared to those of nontreated boards. Those boards impregnated with 30% concentration of fire-retardants can pass the standard of the 3rd grade accoirding to CNS 6532.

並列關鍵字

steam-injection hotpressing ； conventional hotpressing ； particleboard ； fire-retardancy