ẢNH HƯỞNG CỦA THÔNG SỐ CHẾ ĐỘ ÉP ĐẾN TÍNH CHẤT CƠ HỌC, VẬT LÝ CỦA VÁN DĂM ĐỊNH HƯỚNG TỪ LUỒNG (DENDROCALAMUS BARBATUS)
DOI:
https://doi.org/10.70169/VJFS.1196Abstract
In this article, the effect of pressing temperature and time on the physical and mechanical properties of Bamboo oriented strand board from Dendrocalamus barbatus. Melamine Urea Formaldehyde (MUF) adhesive was used at a resin content of 13%. The boards were manufactured under a pressing pressure of 2.5 MPa, with three levels of pressing temperature (140, 150, and 160°C) and three pressing times (10, 12, and 14 minutes). The results showed that the board density did not vary significantly among pressing conditions; however, the physical and mechanical properties such as thickness swelling, modulus of rupture (MOR), modulus of elasticity (MOE), and internal bond strength (IB) differed markedly. The optimal properties were obtained at a pressing temperature of 150°C and a pressing time of 14 minutes, with a density of 0.75 g/cm³, thickness swelling of 9.48%, MOR of 57.39 MPa, MOE of 7,838.45 MPa, and IB of 0.45 MPa.
These results indicate that Bamboo oriented strand board product from Dendrocalamus barbatus meets the requirements of TCVN 12362:2018 standard for load-bearing particle board used in dry conditions.
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