Tunneling in solvent-free laminating
Tunneling effect
Tunneling effect produced by the 4 major causes and improvement measures.
1. Causes
(1) The film tension is not properly controlled because the initial adhesive force of solvent-free adhesive is small.
(2) The film itself has a relaxation part exists.
(3) The winding tension is too small.
(4) Uneven winding.
2, improvement measures
(1) control the matching of tension, and wind up the film as tight as possible.
(2) Control the thickness difference of the film within a certain value.
(3) Ensure that the winding is neat and tidy, not string rolls.
Key words:
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