## 3 Results and Discussion
### Edge Band Studies
#### 3.1.1 The Influence of the Type of Glue on Quality of the Glued Joint
The optimal technical parameters were identified: temperature of applying EVA glue at 140-150 \({}^{\circ}\)C, glue dosage of 363-379 g/m\({}^{2}\), feed rate of 13-15 m/min--can be directly applied to improve the peel strength of PVC edge bands, thereby enhancing product durability and reducing failure rates during use. This study also highlights the importance of maintaining these parameters within specific ranges to avoid issues such as insufficient peel strength due to premature drying of the adhesive or inadequate pressure application, which are critical for ensuring the quality and longevity of edge-banded furniture components. This study is structured into three separate experiments, each focusing on one of these factors. The glue dosage was carefully measured to balance between sufficient bond strength and the avoidance of quality issues, such as glue line and glue stain. The feed rate was assessed to find a balance between the adhesive opening time and the workers' ability to apply proper pressure, which is crucial for achieving adequate peel strength without causing edge breakage. A universal testing machine was used for the peel tests, with the peel speed set to 48 mm/min. The results were calculated and analyzed according to the Chinese standard QB/T3655 [27]. [PERSON] [6] showed that the type and thickness of edge banding materials, as well as the duration of heat exposure, substantially affect the bending and tensile strength of MCP, with thicker PVC edge banding showing increased strength over time. This knowledge can guide manufacturers to select appropriate edge banding materials and thicknesses to enhance furniture durability and performance. PVC (0.4, 0.8, 1, and 2 mm) and melamine (0.4 mm) were used as edge banding materials. The edge bands were affixed using hot-melt adhesive with iron at 200 \({}^{\circ}\)C for melamine and with an auto edge banding machine for PVC (at 200 \({}^{\circ}\)C and feed speed of 12 m/min). The mechanical properties, including the bending and tensile strengths, were measured using a universal testing machine 20, 30, 40, and 50 days after edge-bending and product weathering treatment at different indoor temperatures. Edge banding significantly influences the bending and tensile strengths of melamine-coated particleboards (MCP). Thicker PVC edge bands, specifically 2 mm, have been shown to provide the highest bending and tensile strengths after 50 days, indicating that edge banding can effectively enhance the mechanical properties of MCP over time. Conversely, non-banding or the use of thinner edge bands, such as 0.4 mm melamine, results in lower strength. [PERSON] et al. [25] indicated that the choice of edge band material and thickness has a significant impact on the mechanical and physical properties of particleboard slats, which are critical in furniture design and manufacturing. Contrary to expectations, the use of 2 mm thick PVC and ABS edges notably reduced the modulus of rupture (MOR) and modulus of elasticity (MOE), which could influence the structural integrity and load-bearing capacity of furniture components. Additionally, these materials significantly limit swelling and water absorption, thereby enhancing the durability of the furniture under humid conditions. However, the susceptibility of PVC and ABS to deformation compared to other materials, such as veneers, must be considered in applications where dimensional stability is crucial. This study underscores the need for further research on the influence of edge bands on furniture strength, particularly for narrow slats, to inform material selection and design decisions in the furniture industry. The application of 2 mm thick PVC and ABS edges decreased the MOR and MOE values, potentially affecting the structural integrity of furniture components. Despite this, 1 mm thick PVC and ABS edges exhibit the best adhesion to particleboard when using EVA hot-melt adhesive, indicating a strong bond and finish quality.