Solid wood and panel furniture

Solid wood and wood-based panel furniture feature ever-changing designs and diverse processing techniques. Different processing equipment and techniques produce high-quality, high-value solid wood and wood-based panel furniture, dominating the mid-to-high-end furniture market and promoting home furnishing culture.

Solid wood adhesive series, veneer and thin slice adhesive series, various structural assembly adhesive series, and edge banding adhesive series work together to meet the meticulous requirements of different manufacturing processes.

A technical expert team with over twenty years of experience in furniture manufacturing and adhesive application, along with China’s largest R&D team for woodworking adhesives, focuses on process improvement and adhesive application solutions. We provide comprehensive, customized services to manufacture higher-quality solid wood and wood-based panel furniture.

Adhesive Solutions for Solid Wood and Wood-Based Panel Furniture, Related Processes, and Recommended Adhesives:

Analysis of Common Issues

Why are solid wood furniture prone to deformation or structural cracking?

Cause of the Problem 

• Uneven moisture content among solid wood furniture components; inherently high moisture content in solid wood leads to later shrinkage and uneven stress, causing deformation, structural changes that easily lead to cracking;

• Poor processing of the most deformation-prone components — tops and doors — failing to address solid wood stress control and relief, resulting in final products that are imperfectly deformed;

• Structural assembly adhesives fail to meet structural strength requirements, or insufficient structural assembly processing precision affects the final structural bond strength.

Solution  

• Control the moisture content of solid wood products below 12% after painting. Solid wood furniture must undergo a balanced dehumidification process before finishing to ensure the moisture content of all components in a single piece is balanced between 8-10%, which is relatively safe;

• For solid wood tops and doors, due to the ever-present nature of internal stress in solid wood, incorporate stress-relief designs into the structure, considering how to mitigate the impact of subsequent stress on the structure without affecting or changing dimensions;

• Thicken or replace the back coating of edge banding; different structures bear different forces. Based on the specific stresses and functional forces involved, selecting the appropriate strength adhesive is most critical. It is recommended to follow the adhesive supplier's recommendations. For structural assembly, achieving precise structural processing accuracy is also particularly important to maximally ensure the structural bond strength.

What causes blistering on veneered panels?

Cause of the Problem 

• Insufficient and uneven adhesive spread, open time issues where thinly applied areas dry out prematurely, unbalanced substrate, poor water resistance of the adhesive causing damage to the bond line when applying water-based lacquers, insufficient strength of the assembly adhesive for thick and special veneer slices, significant thickness variation in veneer slices where thinner areas are prone to blistering, etc. Control over every detail of this application process is key to quality assurance.

Solution  

• Control veneer processing precision and moisture content as required. Inspect substrates and equipment before processing to ensure they meet standard specifications. Strictly control the bonding process according to the supplier’s operating instructions.

Why are solid wood furniture prone to deformation or structural cracking?

Cause of the Problem 

• Significant thickness variation among individual boards; when laminating multiple boards together, thinner areas receive less pressure or fail to make proper contact;

• Uneven machining of the bonding surfaces, exhibiting chatter marks or snipe, resulting in gaps under pressure;

• Simple pressing equipment and clamps lacking sufficient force cannot guarantee the required pressure (hardwood 12-15 kg/cm²), and simple clamping also fails to ensure uniform pressure across all surfaces;

• Insufficient pressing time. Since secondary laminating often involves bonding thick stacked materials, their inherent stress rebound is high. Releasing pressure before the adhesive has fully cured leads to slow rebound and cracking.

Solution  

• For boards needing secondary laminating, they must first be surface planed to a consistent thickness or sanded to calibration before bonding, ensuring a thickness variation of less than 0.2mm between any two boards, guaranteeing even pressure across the entire panel;

• For secondary laminating, it is recommended to use a dedicated hydraulic laminating press to ensure sufficient and uniform pressure. If using manual clamps, balance top and bottom clamping carefully to ensure uniform pressure distribution and adequate force.;

• Pressing time for secondary laminating must be sufficient: for medium-soft wood species, ensure at least 2 hours (at 25°C); for medium-hard wood species, ensure at least 3 hours (at 25°C);

• After secondary laminating, the panel’s moisture content tends to be higher due to multiple bonding processes. Therefore, balanced dehumidification treatment is necessary to better ensure material stability and prevent deformation and cracking.