Folabase Soft A

A soft, self-adhesive underpacking foil

The Folabase Soft A is the self-adhesive modulation of the modern and flexible underpacking foil Folabase Soft U. The two-layer compound made of dimensionally stable polyester and extremely ductile polyurethane ensures an outstanding dimensional stability and thus, stable thickness. The soft polyrethane layer absorbs mechanical forces and ensures a good resistance against paper jam.

The self-adhesive polyester underpacking foils of the Folabase range are characterised by high resistance to swelling in the presence of damping solution and washing agents. They are used to adapt the cylinder circumference and printing length on sheet-fed and web presses. The self-adhesive versions support automation, particularly on presses with automatic plate changers, and simplify subsequent handling.

The microgrooves created by fine lines in the adhesive surface simplify mounting on the cylinder and, if necessary, also facilitate re-mounting during application. The adhesive coating is protected by release paper. Folabase adhesive systems are characterised by high thermal stability up to 60 °C.

In contrast to paper-based underpacking sheets, the tear-resistant, dimensionally stable polyester does not suffer any reduction in thickness when exposed to excessive pressures. Since they contain no PVC, used foils can be disposed of without difficulty.

At a glance

Application Range:
Corrections of cylinder circumference and printing length on sheet-fed presses • specifically recommended for use on blanket cylinders
Main features:
Soft surface • high bond shear, thus no displacement • high temperature resistance of the adhesive up to 60 °C • easy handling • easily repositionable • high resistance to swelling • easy disposal
Technical Data:
Material Polyester-Polyurethan-Laminate,
adhesive on one side,
silicon-protection paper
Colour white-transparent
Adhesive Water based, acrylate-based, halogen-free, thickness 9 - 13 g/m²
Tack value 9 - 14 N (based on Finat 1)
Shear bond strength (60°) > 16 h (based on Finat 8)
Protection paper 80 g/m², with silicon coating on one side
Thicknesses 0.35 - 0.60 mm (see below),
tolerance base foil thickness +/- 10%
Important notes
Minimum order quantity: 5 pieces;
Formats smaller than 50 x 70 cm: 10 pieces
Calculation width: 1 300 mm (Effective width: 1 270 mm)
Available thicknesses:
Thickness Ref. no.   Thickness Ref. no.
0.35 mm 031735/SKL   0.50 mm 031750/SKL
0.40 mm 031740/SKL   0.55 mm 031755/SKL
0.45 mm 031745/SKL   0.60 mm 031760/SKL
Overview Underpacking Materials
Overview Product Range
Product catalogue

Printing blankets, underpacking material, measurement instruments and press room accessories: Download here the current product range brochure (0.9 MB).