Multi-layer carrier film composed of plastic
AssigneeLoparex Germany GmbH & Co. KG
InventorsFelix Grimm, Jürgen Panhans
Life of this patent
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Abstract
A multi-layer plastic film as a carrier film for a glue layer, comprising a layer sequence of (a) an outer layer (a) based on a mixture of α) 3-15 wt % of an extrudable glue and β) 85-97 wt % of at least one C2-C8 olefin-alkyl acrylate copolymer, C2-C8 olefin-methacrylic acid copolymer and/or C2-C8 alkyl methacrylate copolymer, wherein the mixture of α) and β) must be compatible with each other, (b) a layer (b) of at least one polyolefin or one olefin copolymer, (c) a layer (c) of at least one polyolefin or one olefin copolymer, and optionally typical auxiliary substances, as a second outer layer, and composites of said carrier film and an adhesive layer.
Claims12
A composite made of an adhesive layer (d) and of a multilayer plastics film as backing film comprising a layer sequence made of
- a) an external layer (a) formed of a mixture of α) from 3 to 15% by weight of an extrudable adhesive and β) from 85 to 97% by weight of at least one of a C2-C8 olefin/acrylic acid copolymer, a C2-C8 olefin/alkyl acrylate copolymer, a C2-C8 olefin/methacrylic acid copolymer or a C2-C8 alkyl methacrylate copolymer, where the mixture of α) and β) must always amount to 100% by weight and the two mixture components α) and β) must be mutually compatible,
- b) a layer (b) made of at least one of a polyolefin and an olefin copolymer where the layer (b) is immediately adjacent to the layer (a) and, respectively, a second external layer (c),
- c) as second external layer, a layer (c) made of at least one of a polyolefin and an olefin copolymer and optionally of additives or stabilizers,
- wherein the layer (a) has direct connection to the adhesive layer (d) and between the layer (a) and the adhesive layer (d) there is no adhesion-promoter layer or primer layer present and the mixture component α) of the layer (a) is different from an adhesive of the adhesive layer (d);
- and
- wherein the additives or stabilizers are selected from the group comprising antioxidants, antiblocking agents, antifogging agents, antistatic agents, antimicrobial actives, light stabilizers, UV absorbers, UV filters, dyes, color pigments, stabilizers, process auxiliaries, flame retardants, nucleating agents, crystallization agents, lubricants, optical brighteners, plasticizers, spacers, fillers, silicates, waxes, wetting agents, surface-active compounds, and dispersing agents.
Dependencies are inferred from the claim text.