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| *The optimum conditions vary depending on the companion
materials that are to be laminated, so please investigate
before proceeding. |
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YUPO®/YUPO® and Non-absorbent
material/YUPO® |
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| (1) |
Roll/roll laminates
- Dry lamination is appropriate. We recommend
two-component adhesives. To prevent curling,
pay attention to the tension balance, and
when using with sheets, trim before they are
completely hard.
- Sandwich lamination of LDPE, and so on,
is possible, but thermal contraction may occur,
so pay attention to the management of cooling
rolls. When a strong lamination bond is required,
apply a primer coat (AC coating) to YUPO® beforehand.
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| (2) |
Roll/sheet laminates (print laminates)
*When laminating film (PP, PET and flexible PVC)
on printed YUPO® sheets, we recommend a two-component
adhesive. When laminating PP, we recommend that
the hot melt adhesive is subjected to the film
beforehand (e.g., Lamitack).
Preventing curling
- Minimize the tension of the roll film as
much as possible.
- After laminating, turn the film side so
it is facing upwards, roll the sheet, and
cut it after rectifying the curl.
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| (3) |
Sheet/sheet laminates (hot-press lamination)
*When laminating rigid PVC sheets to printed YUPO®
sheets, we recommend a two-component adhesive.
Apply the adhesive to the PVC sheet.
The press temperature is generally between 100
and 120°C. If the temperature is unnecessarily
high, problems may occur with size due to the
contraction of YUPO®. To prevent curling and changes
in dimensions after apply a hot press, continue
applying pressure (cooling press) until YUPO® returns
to room temperature. |
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YUPO®/absorbent material |
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| (1) |
Plywood lamination
Although emulsions such as modified PVA and EVA can be used as adhesives, when a strong adhesion is required, we recommend a two-component hardening adhesive.
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| (2) |
Lamination with absorbent materials with low rigidity (paper)
We don't recommend this because there is a significant chance of curling occurring after lamination. However, in cases where it is possible to prevent curling, emulsions such as modified PVA and EVA can be used as adhesives. Dry lamination is also possible.
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