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US 2026/0109097 A1Published application
Recycling a multilayer system
AssigneeBostik SA
InventorsChristophe ROBERT, Romain PUCHOIS
Life of this patent
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Abstract
The present invention relates to a multilayer system F1 comprising: a layer C1 comprising at least one polypropylene, an adhesive layer Ad made up of a hot-melt self-adhesive composition CA, and a layer C2 comprising at least one polypropylene, said multilayer system F1 comprising at least 80% by weight of polypropylene or a mixture of polypropylenes relative to the total weight of said system. The invention also relates to the use of said system F1 for producing a recycled item.
Claims17
-17. (canceled)
A multilayer system F1 comprising:
- a layer C1 comprising at least one polypropylene,
- an adhesive layer Ad consisting of a hot-melt pressure-sensitive adhesive composition CA comprising:
- i. from 40% to 80% by weight of at least one copolymer A comprising more than 80% by weight of units derived from but-1-ene;
- ii. optionally at least one copolymer T comprising more than 50% by weight of units derived from propylene;
- and
- iii. at least one nonhydrogenated tackifying resin obtained by polymerization, or copolymerization with an aromatic hydrocarbon, of mixtures of unsaturated aliphatic hydrocarbons having from 4 to 6 carbon atoms obtained from petroleum cuts;
- and
- a layer C2 comprising at least one polypropylene,
- said multilayer system F1 comprising at least 80% by weight of polypropylene or of a mixture of polypropylenes, relative to the total weight of said system.
6 more elements
Dependencies are inferred from the claim text.