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US 2026/0184000 A1Published application
Multi-layer construction having good properties for printing
AssigneeCovestro Deutschland AG
InventorsKlas-Moritz Kossel, Marieelen Oelkers
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Abstract
The invention relates to a multilayer construction having particular properties for printing with ink, comprising one or more carrier layers A. comprising ≥70% by weight of a polymer, based on the total weight of the carrier layer A., having a hardness in a range from 50 Shore D to 90 Shore D, wherein at least one of the one or more carrier layers is configured as outer layer A., and at least one polymer layer B. comprising at least one thermoplastic elastomer in an amount of ≥70% by weight based on the total weight of the carrier layer B., and to the production and use thereof.
Claims15
1:
- A co-extruded multilayer construction comprising at least the following layers:
- A. one or more carrier layers A. comprising ≥70% by weight, of a polymer, based on the total weight of the carrier layer A., having a hardness in a range from 50 Shore D to 90 Shore D, measured according to DIN ISO 7619-1-2012-02, wherein at least one of the one or more carrier layers is configured as outer layer A.,
- B. at least one polymer layer B. comprising at least one thermoplastic elastomer, in an amount of ≥70% by weight, based on the total weight of the polymer layer B.,
- C. optionally at least one hotmelt adhesive layer C. which is arranged between the carrier layer A. and the polymer layer B.,
- D. optionally at least one cover layer D. comprising ≥70% by weight, of a polypropylene based on the total weight of the cover layer D.,
- E. optionally at least one further polymer layer E. comprising at least one thermoplastic elastomer, in an amount of ≥70% by weight, based on the total weight of the polymer layer E.,
- wherein the co-extruded multilayer construction has at least one of the following properties:
- (E1) a layer thickness of the carrier layer A. in a range from 30 to 200 μm,
- (E2) a layer thickness of the polymer layer B. in a range from 30 to 200 μm,
- (E3) a peel force between the carrier layer A. and one of the layers in contact with the carrier layer A. selected from the group consisting of the polymer layer B., the adhesive layer C. and the further polymer layer E. in a range from 0.01 N/cm to 0.1 N/cm,
- (E4) a content of additives, selected from the group consisting of waxes, adhesion promoters, and dyes, in the carrier layer A. in a range from 0% to 15% by weight, based on the total weight of the carrier layer A.,
- (E5) a content of additives in the polymer layer B., selected from the group consisting of antiblocking agents, in an amount in a range from 0% to 10% by weight, based on the total weight of the polymer layer B.,
- (E6) a hardness of the polymer layer B. in a range from 60 Shore A to 55 Shore D,
- (E7) a water vapour permeability of at least the polymer layer B. of ≥400 g/c2d,
- (E8) a resistance of a 200 μm-wide conductor track strand produced according to process 1) of ≤10Ω.
12 more elements
2:
- The multilayer construction according to claim 1, wherein the multilayer construction comprises at least one applied conductor track.
3:
- The multilayer construction according to claim 2, wherein the at least one conductor track has at least one of the following properties:
- L1. a width of ≥10 μm,
- L2. a thickness in a range of ≥1 μm,
- L3. an electrical resistance ≤10Ω, at a conductor track strand width of 200 μm.
1 more element
4:
- The multilayer construction according to claim 1, wherein the at least one carrier layer A. comprises one selected from the group consisting of a polypropylene polymer, a PET, and a mixture thereof.
5:
- The multilayer construction according to claim 1, wherein the adhesive layer C. comprises a polymer selected from the group consisting of polyamide, co-polyamide, polyester, co-polyester, TPE-U and a combination of at least two thereof.
6:
- The multilayer construction according to claim 1, wherein the elastomer of the polymer layer B. comprises a thermoplastic polyurethane constructed from a polyol component and a polyisocyanate component, wherein the polyol component of the is selected from the group consisting of polytetrahydrofuran groups, polyethylene glycol ether groups, polyethylene glycol ester groups and a combination of at least two thereof.
7:
- The multilayer construction according to claim 1, wherein the thermoplastic polyurethane of the polymer layer B. comprises polyethylene glycol ether groups or polyethylene glycol ester groups or a combination of both of these in an amount in a range from 20% to 80% by weight, based on the total weight of the polymer layer B.
8:
- The multilayer construction according to claim 1, wherein at least one of the one or more carrier layers A., has at least one, of the following properties:
- (A1) a thickness in a range from 40 to 150 μm,
- (A2) a density in a range from 0.8 to 1.0 g/cm3,
- (A3) a hardness in a range from 55 Shore D to 85 Shore D.
1 more element
9:
- The multilayer construction according to claim 1, wherein the polymer layer B. has at least one of the following properties:
- (B1) a thickness in a range from 40 to 150 μm,
- (B2) a density in a range from 1.05 to 1.3 g/cm3, according to DIN EN ISO 1183-1-A,
- (B3) a tear propagation resistance in a range from 50 to 80 kN/m, measured according to DIN ISOO 34-1,B,
- (B4) a breaking elongation of a 50 μm-thick film in a range from 350% to 800%, measured according to DIN EN ISO 527-2016-09,
- (B5) a breaking stress in a range from 50 to 80 MPa, measured according to DIN EN ISO 527-2016-09,
- (B6) a stress at 50% elongation in a range from 4 to 11 MPa according to DIN EN ISO 527-2016-09,
- (B7) a Shore hardness in a range from 70-100 A.
5 more elements
10:
- The multilayer construction according to claim 1, wherein the multilayer construction has an at least 3-layered construction, comprising two carrier layers A., a polymer layer B., optionally at least one adhesive layer C. between one of the the one or more carrier layers A.
11:
- The multilayer construction according to claim 1, wherein the multilayer construction has an at least 4-layered construction, comprising two carrier layers A., a polymer layer B., optionally at least one adhesive layer C. between one of the the one or more carrier layers A., and the polymer layer B.
12:
- The multilayer construction according to claim 1, wherein the multilayer construction is produced by a blown film process.
13:
- A process for producing a multilayer construction comprising at least the steps of:
- (S1) providing a first polymer A) comprising a polypropylene in an amount in a range from 80% by weight to 100% by weight,
- (S2) providing a further polymer B) comprising at least one thermoplastic polyurethane in an amount in a range from 80% by weight to 98% by weight,
- (S3) optionally providing a further polymer C) comprising at least one thermoplastic polyurethane in an amount in a range from 80% by weight to 98% by weight,
- (S4) optionally providing a further polymer D) comprising at least one thermoplastic polyurethane in an amount in a range from 80% by weight to 98% by weight,
- (S5) optionally providing a further polymer E) comprising at least one thermoplastic polymer, in an amount in a range from 80% by weight to 100% by weight,
- (S6) melting the two polymers A) and B) and optionally C) and/or D) and/or E) in mutually separate extruders,
- (S7) supplying the melts of the polymers A) and B) and optionally C) and/or D) and/or E) into an annular die of a blown film plant,
- (S8) co-extruding the melts of the polymers A) and B) and optionally C) and/or D) and/or E) in the blown film plant to afford the multilayer construction containing at least one carrier layer A. formed from the polymer A) and a polymer layer B. formed from the polymer B) and optionally adhesive layer C. formed from polymer C), optionally a cover layer D. formed from the polymer D) and optionally a further polymer layer E. formed from the further polymer E) and subsequent cooling of the multilayer construction,
- wherein the multilayer construction has a peel force between the carrier layer A. and one of the layers in contact with the carrier layer A. selected from the group consisting of the polymer layer B., the adhesive layer C. or the further polymer layer E. in a range from 0.01 N/cm to 0.1 N/cm.
7 more elements
14:
- The process according to claim 13, wherein the carrier layer A. and optionally further layers disposed between carrier layer A. and polymer layer B. are separated from the polymer layer B. and subsequently an electrical conductor track is printed onto the polymer layer B.
(canceled)
Dependencies are inferred from the claim text.