Finger joint boards are used in a similar way to solid wood boards, but they require significantly less adhesive during the manufacturing process. This makes them more environmentally friendly compared to traditional wood boards. As awareness of sustainability grows, more and more people are choosing finger joint boards over conventional wood panels.
The thickness of finger joint boards varies, with common sizes including 12mm, 14mm, 16mm, 20mm, and even up to 36mm for thicker applications. Unlike some other types of panels, finger joint boards don’t require splints or additional layers, which reduces the amount of glue used. The adhesive typically used is a water-based polyvinyl acetate (PVA) glue, which is non-toxic, odorless, and safe for most applications. Even when it breaks down, it releases only acetic acid, which is not harmful.
Finger joint boards can be categorized into two main types: those with knots and those without. Boards without knots tend to look cleaner and more elegant, making them a popular choice for furniture makers. Many installers use finger joint boards directly for furniture construction, eliminating the need for additional surface panels. This not only saves money but also gives a more natural and stylish finish.
A simple way to assess the quality of a finger joint board is by examining the core material’s growth rings. Most finger joint boards are made from fir, which has distinct and visible annual rings. The larger the rings, the older the tree, and the better the quality of the wood. This is an important factor for those looking for durable and aesthetically pleasing materials.
In addition to fir, there are also eucalyptus finger joint boards available on the market. These are often used for wardrobe shelves and have natural anti-mold properties, reducing the need for mothballs. However, they are more expensive and less commonly found in regular retail stores, usually available only through specialty suppliers.
Finger joint boards come in two types based on their tooth pattern: bright teeth and dark teeth. Dark teeth are considered the highest quality because they provide a smoother finish after painting. Bright teeth may appear uneven when painted, and their production is more complex. Harder woods are preferred for finger joints as they are less prone to warping and offer a more attractive grain pattern.
One key difference between finger joint boards and solid wood boards is that finger joint boards are made from solid wood pieces joined together, while wood boards are typically composite panels made from wood fibers and adhesives. This means finger joint boards retain a natural wood texture, offering a more authentic and organic feel.
When evaluating the environmental friendliness of furniture, the primary concern is the level of formaldehyde emissions. Both finger joint boards and wood boards can meet E1 standards (emitting less than 1.5mg/L of formaldehyde). However, since finger joint boards use less glue, they are generally easier to produce in an eco-friendly manner. Some wood boards still require splints, which can contribute to formaldehyde release. Visually, you can distinguish between the two by looking at the edges — finger joint boards have clean, straight joints, while wood boards often show signs of glued seams.
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