製造長束狀單板層積板條件之研究（II）耐燃處理長束狀單板層積板之物理與機械性質

The Manufacturing Conditions of Long Stick Veneer Laminated Board (LSB) (II)-Physical and Mechanical Properties of Fire-Retardant Treated LSB

洪崇彬(Chung-Pin Hung) ； 王松永(Song-Yung Wang)

《林產工業》 15卷4期 (1996/12) Pp. 609-626

https://doi.org/10.6561/FPI.1996.15(4).5

摘要

本研究係探討單板樹種，膠合劑，用膠量，氣乾比重，耐燃處理等條件對長束狀層積板物理、機械及耐燃性質之影響，得到次述結果。（1）構成比1：2：1之耐燃及未耐燃杉木LSB之尺寸安定性較佳，但仍較合板為大。（2）耐燃杉木LSB之靜曲性質、壓縮性質及抗剪強度值有隨用膠量增加而增大之趨勢，可顯示採用噴膠方式布膠效果良好。（3）耐燃處理（t型）對於杉木LSB靜曲性質之影響不明顯，但對於壓縮性質之影響除了σ_c⊥不明顯之外，皆因加入耐燃藥劑使強度降低。就比強度觀之，經鄧肯新多變域分析，MOR_∥/ru及σ_c∥/ru值無顯著差異，而MOE_∥/ru及E_c∥/ru值以未耐燃處理者（u型）大於耐燃處理者。（4）耐燃處理對於內聚強度之影響程度，顯示15%～380%之正面效應。比內聚強度（IB/ru）顯示t型LSB會大於u型LSB。而經耐燃處理後，LSB之吸水厚度膨脹率會較未處理LSB為低，耐燃處理LSB之抗剪強度則會顯示-3%～-67%之負面效應。

關鍵字

長束狀層積板 ； 用膠量 ； 機械強度 ； 比強度 ； 耐燃處理

並列摘要

The purpose of this study was to investigate the effects of manufactural conditions on the physical, mechanical and fine-resistant properties of long stick veneer laminated board (LSB). Two groups of long stick were rotary cut from china-fir (Cunninghamia lanceolata) and radiate pine (pinus radiate D. Don) veneer, one group was immersed with Lee-An 302 fire-retardant (FR) (a mixture of Boron, chloride, ammonium sulfate and phosphides) and other group was untreated. Conventional hot press was used to fabricate the LSB with resin contents of 4%, 6% and 8% of Bakelite type of phenol formaldehyde. The target densities were 0.45, 0.55, 0.65 and 0.75 g/cm^3. The results were summarized as follows: (1) The non-FR-and FR-treated LSB made of 1:2:1 construction ratio showed better dimensional stability. However, it was also larger than that of plywoods. (2) The values of strength in static bending, compression and shear of FR-treated LSB increased with increasing resin contents, it suggested that better glue bonding efficiency could be obtained by spray method. (3) The effects of FR-treated (t-type) on static bending strength of China fir LSB were not significant. However, FR-treatment reduced the compression strength except that the values ofσ_C⊥. When the comparison was made on the basis of specific strength between non-FR-treated and FR-treated LSB, according to the results obtained from the analysis of new range Duncan's test, there were no significant differences for MOR∥/ru and σ_C∥/ru values, however, non-FR-treated groups were significant greater than those of FR-treated groups for MOE∥/ru and E_C∥/ru values. (4) The effects of FR-treatment (t type) on internal bond strength showed a positive efficiency of 15%-380%. The values of specific internal bond strength (lB/ru) showed larger values for FR-treated groups than those of non-FR-treated groups. Thickness swelling due to water absorption of FR-treated groups were much less than those of non-FR-treated ones. Moreover the shearing strength of FR-treated groups showed a negative efficiency of 3%-67% compared to those of non-FR-treated ones.

並列關鍵字

long stick ； veneer laminated board(LSB) ； resin content ； mechanical properties ； specific strength ； fire-retardant treatment