利用廢棄聚乙烯與木粒片製造塑膠木料複合板

Manufacturing of Plastic/Wood Composite Boards with Waste Polyethylene and Wood Particles

黃國雄(Gwo-Shyong Hwang)

《台灣林業科學》 12卷4期 (1997/12) Pp. 443-450

https://doi.org/10.7075/TJFS.199712.0443

摘要

本研究中於含木率40%-70%之條件下，以無混鍊與混鍊處理製造兩種塑膠木料複合板。無混鍊複合板係將廢棄聚乙烯與粒片均勻混合後，於180℃進行熱壓而製成，其中粒片含膠率為9%、6%、3%與0%。混鍊複合板係將廢棄聚乙烯與粒片利用單螺桿擠壓機進行混鍊處理後，切成小片再進行熱壓而製成。為了瞭解複台板之性質，進行靜曲強度與厚度膨脹率等試驗。
試驗結果歸結如下：1.塑膠木料複合板之靜曲強度與最大撓距隨含木率之增加與粒片含膠率之減少而降低，但靜曲彈性係數受含木率增加之影響則因混鍊處理而不同。2.塑膠木料複合板之厚度膨脹率隨含木率之增加與粒片含膠率之減少而增大。3.混鍊處理使得粒片外表受到聚乙烯之披護，對塑膠木料複合板之強度性質與尺寸安定性具有正面之效果。

關鍵字

廢棄塑膠 ； 聚乙烯 ； 木料 ； 粒片 ； 塑膠木料複合板

並列摘要

Two kinds of plastic/wood composite boards were manufactured by uncompounded and compounded treatments with wood contents between 40% and 70% in this study. The uncompounded boards were made by pressing a mixture of waste polyethylene and wood particles with resin contents (urea resin) of 9%, 6%, 3% and 0% at 180℃. The compounded boards were made by hot pressing small pieces cut from waste polyethylene and wood particles compounded with a single-screw extruder. Static bending strength and thickness swelling tests were carried out to examine the properties of these boards.
Results are summarized below: 1. The MOR and maximum deflection of boards by both treatments decreased with increasing wood content and with decreasing resin content of particles. The effects of increasing wood content on MOE of these boards were different depending on the treatment. 2. The thickness swelling of boards by both treatments increased with increasing wood content and with decreasing resin content of particles. 3. Particles with surfaces covered by polyethylene film had positive effects on the strength property and dimension stability of compounded boards.

並列關鍵字

waste plastic ； polyethylene ； wood ； particle ； plastic/wood composite board