The basic essentials of edge banding technology
Basic requirements for substrate 1
Materials such as medium density fiberboard or particleboard are used as the base material for edge wrapping, but due to the low cost of particleboard, it is often used as the base material for edge wrapping components. The main technical indicators of particleboard suitable for edge wrapping are that when the thickness of the particleboard is greater than 10mm, its warpage should be less than or equal to 0.5%; The internal bonding strength should meet the requirements of the national standard (92) for Class A high-quality and first-class particleboard, so that the bonding strength between the surface material and the particleboard during edge wrapping can achieve good results. The density of particleboard should be controlled between 0.6-0.85 grams per cubic centimeter, which is beneficial for milling the edge profile and can achieve high surface smoothness, while reducing the penetration of adhesive and ensuring sufficient adhesive amount during edge bonding. The substrate should be sandblasted before use to control the thickness tolerance within 0.1 mm of the soil.
Basic requirements for 2-layer materials
The surface layer material should generally have good bending performance under heating conditions. The direct continuous edging machine can use a variety of edging materials, such as low-pressure melamine veneer CPL、 Paint film paper and veneer materials, but the commonly used surface material is low-pressure melamine adhesive panel. The thickness of the surface material for edge wrapping using a direct continuous post forming edge wrapping machine is generally less than 0.35mm, and the bending performance and strength of the surface material have a significant impact on the quality of the edge wrapping.
Basic requirements for balanced layer materials
To ensure that the components do not warp, a balancing layer must be glued to the back of the components. The material used for the balance layer should be the same as the surface layer material, but due to the high price of the surface layer material, ordinary low-pressure melamine veneer or other flexible materials are generally used for the balance layer material. In actual production, warping may occur after edge wrapping, mainly due to improper use of surface and balance layer materials. Only when the thickness of the surface layer material multiplied by the elastic modulus of the surface layer material is equal to the thickness of the balance layer material multiplied by the elastic modulus of the balance layer material, will there be no warping of the post formed edge wrapped components.