Common Flexible Packaging Converting Problems Flexible packaging defects often look like they started at the last station, because that is where the defect becomes easy to see. A light contact mark may begin near a printing nip, become clearer after adhesive contact, change again after lamination heat, and finally show as a winding mark on […]

Common Plastic Sheet and Board Processing Problems Plastic sheet and board problems often become visible after the material leaves the cooling, polishing, haul-off, or downstream support area. The sheet may still move through the line, but the surface begins to show fine lines, pressure imprints, gloss bands, drag marks, or unstable traction. For thicker sheet

Common Foil and Metal Strip Processing Problems Foil and thin metal strip problems often show up as very light surface lines, scratches, pressure marks, edge drift, or sudden tension changes. On bright, soft, coated, or surface-sensitive metal, a small contact issue can become visible quickly. The mark may look minor under normal light, but it

Common Paper Converting Problems Paper converting problems usually show up first as small changes on the sheet: paper dust, dirty streaks, pressure lines, dents, coating marks, rewinding marks, or a paper web that slowly moves off track. A useful check starts at the first visible position. Look at where the mark appears, which roller the

Common Web Handling Problems in Nonwoven Processing Lines A nonwoven web can look stable at the unwind, then start showing pressure marks, flattened fiber areas, dust bands, static pickup, edge waviness, or surface pattern change after one section of the line. These problems are easy to misread because nonwoven material is a fibrous web, not

How to Choose Rubber Rollers for Ink, Adhesive, Solvent, or Cleaning Liquid Contact When a rubber roller works with ink, adhesive, oil, solvent, or cleaning liquid, the first thing to check is the real contact condition. A roller marked as NBR, FKM, silicone, PU, or another rubber type can still behave very differently on the

How to Choose Rubber Rollers for Heat and Pressure Contact A rubber roller used near heat and pressure has to stay stable after the line starts running. Cold hardness, surface feel, or a simple replacement match is not enough for every position. On heated nips, laminating sections, drying-after-contact areas, hot film handling points, coating lines,

Why Do Repeat Marks Appear on Web Materials? A repeat mark often shows up after winding, rewinding, slitting, coating, laminating, or final inspection. The web may look normal in some areas, then the same short mark, shadow, dull spot, pressure band, or small surface defect appears again along the roll. For film, paper, foil, nonwoven,

Static and Dust Problems in Web Handling If film, nonwoven, foil, separator film, coated paper, release film, or other clean web materials keep picking up dust, showing small particles, clinging to nearby parts, or running with unstable contact, static should be checked early. In many web handling lines, the problem becomes clear after the web