Why Do Edge Banding Strips Turn White? A Chinese Manufacturer‘s Perspective274

As a leading edge banding strip manufacturer in China, we frequently encounter questions regarding the whitening phenomenon observed on edge banding after processing. The short answer is: not all edge banding strips turn white after trimming, but it's a common issue that deserves careful examination. The reasons behind this discoloration are multifaceted and depend on several factors, including the material of the banding, the trimming method, and post-processing handling. Let's delve into the specifics to understand why this happens and how to mitigate it.

Types of Edge Banding and Their Susceptibility to Whitening

Different materials react differently to the trimming process. Melamine edge banding, a popular choice for its durability and affordability, is particularly prone to whitening. This is largely due to the melamine resin layer's structure. The melamine resin is a thermoset material, meaning it undergoes an irreversible chemical change during the manufacturing process. The surface layer, though seemingly smooth, can contain microscopic voids or unevenness. When the trimming process applies pressure and friction, these imperfections can be exposed, scattering light and creating a white, hazy appearance. The intensity of this effect depends on the quality of the melamine resin itself and the precision of the manufacturing process.

PVC edge banding, another common option, is generally less susceptible to whitening. However, improper trimming techniques can still cause localized discoloration. The softer nature of PVC makes it more prone to deformation under excessive pressure, potentially leading to a cloudy effect. Furthermore, the type of PVC used – specifically the plasticizer content – can influence its reaction to trimming. Higher plasticizer content can lead to increased softness, potentially increasing the likelihood of whitening.

2025-04-21

Previous：How to Use Edge Banding Wax for a Professional Finish: A Comprehensive Guide

Next：Is Your Sideboard Missing Something? The Importance of Edge Banding