Adhesive printing form attachment layer, method for its manufacture, and printing form attachment cylinder comprising the same
AssigneeTesa SE
InventorNils Thebud
Life of this patent
Estimating the term…
Abstract
The present invention relates to an adhesive printing form attachment layer comprising a support, and a permanently sticky layer suitable for receiving a printing form and fixing a printing form during a printing operation provided on the support, wherein the permanently sticky layer comprises a crosslinked structure obtained by crosslinking a crosslinkable composition comprising at least one polyurethane-based polymeric compound that has two or more crosslinkable groups, which are preferably ethylenically unsaturated groups, and two or more —NHC(O)O— linkages. A method of preparing the adhesive printing form attachment layer and of operating a printing machine using the adhesive printing form attachment layer are also disclosed.
Claims19
An adhesive printing form attachment layer comprising:
- a support;
- and
- a permanently sticky layer disposed on the support, the permanently sticky layer comprising a crosslinked polyurethane-based material,
- wherein, the permanently sticky layer has a first surface facing the support, a second surface facing away from the support, and a thickness between the first surface and the second surface;
- and
- wherein, an average value of adhesion of the permanently sticky layer throughout 20% of the thickness from the second surface is lower than an average value of adhesion of the permanently sticky layer throughout 20% of the thickness from the first surface.
An adhesive printing form attachment layer comprising:
- a support;
- and
- a permanently sticky layer disposed on the support, the permanent sticky layer comprising a crosslinked polyurethane-based material;
- wherein, the permanently sticky layer has a first surface facing the support, a second surface facing away from the support, and a thickness between the first surface and the second surface;
- and
- wherein, an average value of adhesion of the permanently sticky layer throughout 20% of the thickness from the second surface is lower than the average value of adhesion of the permanent sticky layer at a center of the permanently sticky layer.
An adhesive printing form attachment layer comprising:
- a support;
- and
- a permanently sticky layer disposed on the support, the permanently sticky layer comprising a crosslinked polyurethane-based polymer;
- wherein, the crosslinked polyurethane-based material of the permanently sticky layer is a product of crosslinking a crosslinkable composition comprising a polyurethane-based polymeric compound that has two or more crosslinkable groups;
- wherein, the polyurethane-based polymeric compound is represented by formula (I)
- R3—OC(O)—NH—R1—[NH—C(O)—O—R2—O—C(O)—NH—R1]n—NH—C(O)O—R4 (I)
- R3 represents an organic group comprising a crosslinkable group;
- R4 represents an organic group comprising a crosslinkable group;
- R3 and R4 may be the same or different from each other;
- n is an integer of 1 to 1000;
- R1 are divalent linking groups that may be the same or different from each other;
- and
- R2 is a divalent linking group, and in case there are multiple R2, the multiple R2 may be the same or different from each other;
- wherein, R1 and R2 have a molecular weight of 200 to 10,000.
Dependencies are inferred from the claim text.