Testing methods for edge banding strips

Visually inspect whether the color and texture of the edge banding match the board material or the designer's specifications.

 

Check the surface of the edge banding for smoothness and the presence of impurities or specks. The presence of specks, fine fuzz, or pinholes may indicate the use of recycled PVC scrap. Check the back of the edge banding for flatness. Place a flat-edged blade across the width of the banding to check for straightness; if it is not straight, thick glue lines may appear on both sides after application. If the back is flat but thick glue lines still appear after application, investigate the following: Check if the sawn edge of the board is flat; mismatched specifications between the top and bottom saw blades can create a small "step" on the cut surface, interfering with edge banding. Check if the hot-melt adhesive layer is too thick. Check if the thickness and pressure settings on the edge banding machine are properly balanced. Apply a short piece of edge banding and then tear it off forcefully to verify that the bond strength between the banding and the hot-melt adhesive is adequate and uniform.

 

Check the uniformity of the board's edge after trimming; a jagged or serrated appearance may result from the following causes: the trimming blade is too dull; the edge banding material is too hard; or the edge banding contains an excessive amount of calcium carbonate. Scratch the edge banding with a fingernail or another tool; if damage occurs, the surface wear resistance and hardness do not meet standards, indicating substandard quality.