Oriented acrylic block copolymers

The system as claimed in, wherein the ratio of the chain lengths of the polymer blocks P(A) to those of the polymer blocks P(B) is such that the polymer blocks P(A) are present as a disperse phase (“domains”) in a continuous matrix of the polymer blocks P(B).

A single-sided or double-sided pressure sensitive adhesive tape or transfer tape comprising a pressure sensitively adhesive system comprising a pressure sensitive adhesive which is comprised of at least one block copolymer, the weight fraction or fractions of said at least one block copolymers totaling at least 50% of the pressure sensitive adhesive, one block copolymer being formed at least in part of (meth)acrylic acid derivatives, and at least one block copolymer comprising at least the unit P(A)-P(B)-P(A) comprising at least one polymer block P(B) and at least two polymer blocks P(A), where

• P(A) independently of one another represent homopolymer blocks or copolymer blocks of monomers A, the polymer blocks P(A) each having a softening temperature in the range from +20° C. to +175° C.,
• P(B) represents a homopolymer block or copolymer block of monomers B, the polymer block P(B) having a softening temperature in the range from −130° C. to +10° C.,
• the polymer blocks P(A) and P(B) are not homogeneously miscible with one another, wherein the pressure sensitively adhesive system is oriented, possessing a preferential direction, with the refractive index nMD measured in the preferential direction being greater than the refractive index nCD measured in a direction perpendicular to the preferential direction.

The single-sided or double-sided pressure sensitive adhesive tape or transfer tape as claimed in claim 21 wherein said single-sided or double-sided pressure sensitive adhesive tape or transfer tape is a punched product.