RECYCLING A MULTILAYER SYSTEM

1 - 15 . (canceled)

16 . A process for preparing a recycled article, comprising

providing a multilayer system F 1 comprising:

a layer C 1 comprising at least one polypropylene,

an adhesive layer Ad consisting of a hot-melt pressure-sensitive adhesive composition PC comprising:

a composition (a 1 ) of styrenic block copolymers comprising at least one elastomer block; and

one or more tackifying resins (a 2 );

a layer C 2 comprising at least one polypropylene,

said multilayer system F 1 comprising at least 80% by weight of a polypropylene or of a mixture of polypropylenes, with respect to the total weight of said system, and

using the multilayer system F 1 to prepare the recycled article.

17 . The process as claimed in claim 16 , characterized in that the composition (a 1 ) of styrenic block copolymers comprising at least one elastomer block consists, on the basis of its total weight:

of from 10% to 90% by weight of at least one diblock copolymer chosen from the group consisting of SI, SBI, SIB, SB, SEB and SEP, and

of from 10% to 90% by weight of at least one triblock copolymer chosen from the group consisting of SIS, SIBS, SBS, SEBS and SEPS.

18 . The process as claimed in claim 16 , characterized in that the content of composition (a 1 ) in the hot-melt pressure-sensitive adhesive composition PC ranges from 30% to 80% by weight, with respect to the total weight of said composition PC.

19 . The process as claimed in claim 16 , characterized in that the total content of styrenic units of said composition (a 1 ) varies from 10% to 40% by weight, on the basis of the total weight of (a 1 ).

20 . The process as claimed in claim 16 , characterized in that the content of diblock copolymer in the composition (a 1 ) varies from 15% to 80%.

21 . The process as claimed in claim 16 , characterized in that the hot-melt pressure-sensitive adhesive composition PC comprises:

from 40% to 70% by weight of a composition (a 1 ) of styrenic block copolymers comprising at least one elastomer block, said composition (a 1 ) consisting, on the basis of its total weight:

of from 10% to 90% by weight of at least one diblock copolymer chosen from the group consisting of SI, SBI, SIB, SB, SEB and SEP, and

of from 10% to 90% by weight of at least one triblock copolymer chosen from the group consisting of SIS, SIBS, SBS, SEBS and SEPS;

the total content of styrenic units of said composition (a 1 ) varying from 10% to 40% by weight, on the basis of the total weight of (a 1 ); and

from 30% to 60% by weight of one or more tackifying resins (a 2 ).

22 . The process as claimed in claim 16 , characterized in that the composition (a 1 ) consists of an SIS triblock copolymer and of an SI diblock copolymer.

23 . The process as claimed in claim 16 , characterized in that the multilayer system F 1 comprises at least 80% by weight, of polypropylene or of a mixture of polypropylenes, with respect to the total weight of said system.

24 . The process as claimed in claim 16 , characterized in that the recycled article is a single-layer film, a laminate, a (multilayer) complex or a molded article.

25 . The process as claimed in claim 16 , characterized in that the recycled article comprises at least 90%, of polypropylene or of a mixture of polypropylenes, with respect to the total weight of said recycled article.

26 . The process as claimed in claim 16 , said process comprising:

a) the provision of the multilayer system F 1 ;

b) the conversion of the multilayer system F 1 into flakes;

c) the optional mixing of the flakes obtained in stage b) with recycled or virgin polypropylene; and

d) the conversion of the flakes from stage b) or of the mixture from stage c) into a recycled article.

27 . A recycled article obtained according to the process as defined in claim 26 .

28 . The recycled article according to claim 27 , having improved impact strength.

29 . The recycled article according to claim 27 , having impact strength improved by at least 5%, in comparison with a control article consisting of 100% of polypropylene and devoid of the hot-melt pressure-sensitive adhesive composition PC.