Tunneling In Lamination

Luckily most issues can be solved relatively easily as long as you know how to properly recognize the symptoms.

Tunneling in lamination.

Auto lamination x more cross web tunneling auto lamination x less cross web tunneling note. If one web is strained significantly more than the other web s curl problems or delamination wrinkling known as tunneling can occur in the laminated webs. There are two things to consider. Lamination has become a regular part of the converting process.

Capital adhesives has developed a unique line of litho lamination adhesive products to help reduce issues like tunneling all the while maximizing efficiencies. When tunneling occurs it can have a detrimental effect on the laminate s appearance and performance. In the case of overlaminating uv printed graphics trapped air bubbles are formed between layers due to unevenness of the print surface. Issues can be low bond or peel strength poor heat resistance tunneling or delamination in the package after exposure to packaged product or environment.

It s hard to find a paper film or foil product that isn t a laminate whether the layers are from adding coatings or combining two or more substrates. The amount of tension should be a ratio of the modulus and the web thickness to prevent curl and or tunneling after the lamination process. Roll and web defect book on page 350. Laminate or package performance issues may occur early in the process or not show up until packaged product has been on the shelf in service for some time.

Tunneling is the localized separating or delamination of the substrates often caused by differences in moisture content in the substrates. Tunneling is where a small areas across the web delaminates between the pet film and the aluminium foil the tunneling defect occurs after the dry bond lamination before the pet film and aluminum foil laminate is extrusion coated with the polyethylene. Whether you re new to laminating or have been using a laminator for years troubleshooting common lamination problems can seem confusing. At the awali tunnel in lebanon in 1960 for example a huge flow of water and sand filled over 2 miles of the bore and more than doubled construction time to eight years for its 10 mile length.