25-10-2018 дата публикации
Номер: US20180304525A1
Принадлежит:
A method of activating the shrink characteristic of a multi-layered film (), the method comprising the steps of providing a multi-layered film comprising at least a base layer film () that comprises a shrinkable film, and a photothermic layer (), associated with the base layer film, and comprising a photothermic material, exposing the multi-layered film () to electromagnetic radiation in order for the photothermic material to generate heat and shrink the multi-layered film (), wherein the electromagnetic radiation comprises UV-light having a peak wavelength between 200 nm and 399 nm, and at least 90% of the UV-light is within a bandwidth of ±30 nm of the peak wavelength. 1. Method of activating the shrink characteristic of a multi-layered film , the method comprising the steps of:providing a multi-layered film comprising at least a base layer film comprising a shrinkable film, and a photothermic layer, associated with the base layer film, and comprising a photothermic material,exposing the multi-layered film to electromagnetic radiation in order for the photothermic material to shrink the multi-layered film;wherein the electromagnetic radiation comprises UV-light having a peak wavelength between 200 nm and 399 nm, andat least 90% of the UV-light is within a bandwidth of ±30 nm of the peak wavelength.2. The method of claim 1 , wherein the UV-light is emitted by a LED-UV emitter.3. The method of claim 1 , wherein the UV-light has a peak wavelength between 300 nm and 395 nm claim 1 , more preferably between 350 nm and 390 nm.4. The method of claim 1 , wherein the base layer film is substantially free from a photo-thermic material.5. The method of claim 1 , wherein the base layer film is a multi-layered laminated base layer film.6. The method of claim 1 , wherein the photothermic layer is provided in direct contact with the base layer film.7. The method of claim 1 , wherein the multi-layered film has a UV absorption of at least 50% claim 1 , calculated from ...
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