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更新時(shí)間：2025.01.04
人工林杉木板材高溫和常溫組合干燥研究

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大?。?span class="single-tag-height">545KB

頁(yè)數(shù)： 4頁(yè)

In this paper, a technique with combination of normal temperature drying and high temperature drying technology was introduced to dry Chinese Fir plantation board, the result with more than one year's researching showed that, the lumber dimension stability after drying was best when dried in combination method, and second when dried in normal temperature kiln while the worst in airdry. Meanwhile, the result also showed that not only was dimension stability increased but also the density of fir was increased, this fact made plantation fir a excellent material in furniture and interior decoration field. So primary conclusion was got that this combining way was considered one kind of lower drying cost, simple way and effective drying methods.

不同固含量低分子酚醛樹脂浸漬改性杉木板材性能的研究

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大小：341KB

頁(yè)數(shù)： 5頁(yè)

為改善杉木的物理力學(xué)性能,采用真空-加壓浸漬工藝,對(duì)速生杉木進(jìn)行低分子酚醛樹脂增強(qiáng)改性處理,分析不同樹脂增重率對(duì)改性杉木性能的影響,以及樹脂在木材長(zhǎng)度和厚度方向上的分布特點(diǎn)。結(jié)果表明,杉木經(jīng)過(guò)固含量為10%、20%、30%的酚醛樹脂浸漬處理后,其尺寸穩(wěn)定性隨樹脂固含量的增加逐漸提高,靜曲強(qiáng)度由64.5 MPa提高至75.0 MPa,彈性模量和表面硬度分別提高了6.1%、27.5%、48.2%和29.8%、63.1%、73.8%,但沖擊韌性隨著樹脂增重率的增加而逐漸降低;樹脂在木材長(zhǎng)度方向上分布均勻,在厚度方向上木材表面多于其內(nèi)部。

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