密度及塑膠種類對單板貼面木材塑膠複合材物理機械性質之影響

Effects of Density and Plastic Type on the Physicomechanical Properties of Veneer Overlaid Wood Plastic Composite

趙瑩瑩(Ying-Ying Chao) ； 洪克昌(Ke-Chang Hung) ； 吳志鴻(Jyh-Horng Wu)

《林產工業》 33卷2期 (2014/06) Pp. 99-106

https://doi.org/10.6561/FPI.2014.33(2).5

摘要

本研究利用台灣二葉松（Pinus taiwanensis）木粒片、原生型高密度聚乙烯（Virgin high density polyethylene，vHDPE）、回收型高密度聚乙烯（Recycled high density polyethylene，rHDPE）、回收型低密度聚乙烯（Recycled lowdensity polyethylene，rLDPE）及放射松（Pinus radiata）單板以一次熱壓成型（One-step hot-press molding）方式製備單板貼面木材塑膠複合材（Veneer overlaid wood plastic composite，VWPC），以探討密度及塑膠種類對VWPC物理機械性質之影響。試驗結果顯示，木材塑膠複合材（Wood plastic composite，WPC）之抗彎性質隨密度增加而提高，但不同密度VWPC之抗彎性質則無統計上差異。然而，VWPC之抗彎性質均優於WPC。另外，比較不同密度VWPC之性質時可以發現，以密度800 kg/m^3之VWPC較能兼具試材之尺寸安定性及機械性質之表現。此外，比較原生與回收HDPE所製備之VWPC時發現，利用回收塑膠所製備之複合材，其具有與原生塑膠製備者相似之物理機械性質。

關鍵字

單板貼面木材塑膠複合材 ； 一次熱壓成型 ； 回收塑膠 ； 物理機械性質 ； 尺寸安定性

並列摘要

The main purpose of this study is to develop and manufacture veneer overlaid wood plastic composite (VWPC) from wood (Pinus taiwanensis) particles, different kinds of plastics (including virgin high density polyethylene (vHDPE), recycled high density polyethylene (rHDPE) and recycled low density polyethylene (rLDPE)) and veneer (Pinus radiata) by one-step hot-press molding. The effects of density and plastic type on the physicomechanical properties of VWPC were evaluated. The experimental results revealed that the flexural properties of WPC increased with increasing density, while no statistical differences were observed on VWPC of different densities. Compared with WPC, the panels sandwiched with veneers (VWPC) were greatly improved their flexural properties. In addition, among various densities of VWPC, the VWPC with density of 800 kg/m^3 exhibited the outstanding performance on the dimensional stability and mechanical properties. Moreover, mechanical properties of the VWPC containing recycled plastic (rHDPE) were similar and comparable to those of composite made from virgin HDPE.

並列關鍵字

Veneer overlaid wood plastic composite ； One-step hot-press molding ； Recycled plastic ； Physicomechanical properties ； Dimensional stability