Prioritize requesting third-party test reports to confirm formaldehyde emissions meet the E1 standard or higher (premium products can reach the ENF level); avoid models that use inferior adhesives or non-eco-friendly surface films to ensure health safety from the source.
Inspect the Door Leaf and Internal Core
Opt for a door leaf thickness of at least 4.5cm; it should produce a solid, resonant sound when tapped. For the internal core, prioritize high-density tubular particleboard (bridge-hole board), aluminum honeycomb, or a high proportion of solid wood strips; avoid products filled with honeycomb paper or low-quality foam, as these offer poor sound insulation and are prone to warping.
Verify the Frame and Surface Finish
For the door frame and edges, choose aluminum-magnesium-titanium alloy with a wall thickness of ≥1.4mm and an anodized finish for wear and deformation resistance. Select 100% eco-friendly imported decorative panels that feel smooth to the touch; they should resist visible scratches from light contact with hard objects and be resistant to fading or warping.
Test Hardware and Sealing Details
Choose high-load-bearing stainless steel hinges (over 13cm) and magnetic silent locks that operate smoothly without sticking or making noise. Ensure the door leaf edges are fitted with continuous magnetic sealing strips that create a tight seal when closed, effectively enhancing sound insulation.
Confirm Matching Materials and Installation
Avoid MDF (medium-density fiberboard) for door casings and trim; choose materials that match the door leaf to prevent swelling or warping upon contact with water. Prioritize brands with standardized installation procedures to ensure precision and avoid future issues such as uneven gaps or door sagging.