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The cause of the composite membrane with wrinkles
by：Kolysen
2020-12-17
Composite good product with horizontal wrinkles, especially at both ends of the drum are often appear.
The wrinkles in a flat base material, another base material processes form the majority of tunnel.
Material.
1)
At the beginning of the adhesion force is insufficient, adhesives, 2)
Insufficient, base material surface tension on craft.
1)
Rolling tension, two kinds of base membrane does not adapt, a too big, a small, such as BOPP/AL composite, such as BOPP tension is too large, bake, heating, elongated, AL tension can't be large, and elongation of small, after composite, BOPP cooling contraction causes the aluminum foil protuberant, transverse appear one at a tunnel, 2)
Enough, glue, uneven, cause the bond force is not good, cause local local wrinkles, 3)
, coil winding tension is too small, not tight, compound after the relaxation phenomenon, offer to shrink the base material of the possibility of shrinkage, if the winding tension, tightly rolled compaction, the plane to the curing chamber immediately after curing, even if process some don't adapt to, also won't appear wrinkles, 4)
, oven temperature is too low and not ventilated, dry too much residual solvent adhesives is insufficient, the early adhesion force is insufficient, to move each other two kinds of basement membrane.
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