Method for stamping thermally activatable adhesive materials which are not tacky at room temperature

1. A method of producing diecuts from heat-activatable adhesive films, which comprises

a. coating a heat-activatable adhesive initially onto a first carrier material,

b. laminating the heat-activatable adhesive layer onto a release liner having a glass transition temperature at least 20° C. lower than the glass transition temperature of the heat-activatable adhesive, at a temperature between the glass transition temperature of the release liner and the glass transition temperature of the heat-activatable adhesive, the release liner having at least one polyolefin-based surface, and the polyolefinic surface being nontacky at room temperature and having pressure-sensitive adhesive properties at the temperature at which said lamination is carried out,

c. and diecutting the heat-activatable adhesive layer on the release liner.

2. The method of claim 1 , wherein said release liner has a glass transition temperature of at least 30° C. lower than the glass temperature of the heat-activatable pressure-sensitive adhesive.

3. The method of claim 1 , wherein the release liner is an at least two-layer film.

4. The method of claim 3 , wherein the release liner is a coextruded film comprising a polyolefin layer and a layer of polyester, polymethyl methacrylate, polyimide, polyethylene naphthalate, polyurethane or polyamide.

5. The method of claim 3 , wherein the release liner is a film comprising a polyolefin layer and a layer of polyethylene or polypropylene.