| 摘要 |
Substrate materials, coated on at least one side with a pressure-sensitive adhesive comprising a hot-melt adhesive material that has a dynamic complex Tg < -3 (-9 to -25) degrees C at a frequency of 0.1 rad/s. Preferably the adhesive contains a block copolymer, preferably of the A-B or A-B-A type, or a mixture of these, in which A is polystyrene or a derivative thereof and B is propylene, butadiene or isoprene, or mixtures of these, preferably ethylene and/or butylene. Styrene content in the polymer is less than 35 (5-30) wt.%. The adhesive comprises 10-90 wt.% block copolymer, 5-80 wt.% tackifier (eg. oil, wax or resin, or a mixture of these, preferably a resin/oil mixture), less than 60 wt.% emulsifier, less than 15 wt.% additives and less than 5 wt.% stabiliser. |
