CN-122029621-A - Assembly comprising a deformable sheet and a magnetic member

Abstract

The present invention relates to an assembly comprising a sheet and a magnetic member, wherein the sheet is polymer-based and reversibly deformable by interaction of a magnetic field with the magnetic member to form protrusions or depressions, and to the use of the assembly as a tactile surface element and/or artificial leather in a vehicle interior.

Inventors

• J. Oliveira da Silva
• L F Carvalho da Silva
• N. A. Carvalho Araujo
• A. M. Trinity de Pereira

Assignees

• 汽车工业用TMG塑化织物及其他涂料公司

Dates

Publication Date

20260512

Application Date

20240703

Priority Date

20230929

Claims (15)

1. 1. An assembly comprising a sheet and a magnetic member, wherein the sheet is polymer-based and reversibly deformable by interaction of a magnetic field with the magnetic member to form protrusions and/or depressions.
2. 2. The assembly of claim 1, wherein the magnetic member is a plurality of magnetic particles.
3. 3. The assembly of any of the preceding claims, wherein the sheet is a multi-layer structure.
4. 4. The assembly of any one of the preceding claims, wherein the sheet is a multilayer structure comprising a lacquer layer as an uppermost layer and the lowermost layer comprises magnetic particles.
5. 5. The assembly of any one of the preceding claims, wherein the sheet is a multilayer structure and the layer comprising magnetic particles has a thickness of at least 100 μm.
6. 6. The assembly of any one of the preceding claims, wherein the sheet comprises a sensor.
7. 7. The assembly of any of the preceding claims, wherein the sheet is translucent.
8. 8. An assembly according to any one of the preceding claims, wherein the assembly comprises the sheet on a support, wherein the sheet comprises a first portion that is not bonded to the support and a second portion that is bonded to the support, wherein the first portion is reversibly deformable by interaction of a magnetic field with the magnetic member to form a protrusion or recess, and the support is non-deformable by the interaction.
9. 9. The assembly of any one of the preceding claims, wherein the magnetic field is generated by a magnet, wherein the assembly comprises the magnet.
10. 10. The assembly of claim 9, wherein the assembly comprises a carrier with the magnet.
11. 11. The assembly of claim 9 or 10, wherein the magnet is configured to be activated by an external stimulus.
12. 12. Assembly according to any of the preceding claims 9 to 11, wherein the magnet is printed on a carrier.
13. 13. Assembly according to any of the preceding claims 10-12, wherein the assembly comprises the foil on a support as in claim 8, wherein the support of the foil is the carrier comprising the magnet, and wherein the magnet is capable of causing deformation of the first portion of the foil.
14. 14. The assembly of any of the preceding claims 8 to 13, wherein the first portion of the sheet is translucent and the assembly additionally comprises a light source configured to illuminate the first portion of the sheet.
15. 15. Use of an assembly according to any of the preceding claims 1 to 14 as a tactile surface element, an optical surface element, a sound element or an artificial leather in a vehicle interior.

Description

Assembly comprising a deformable sheet and a magnetic member Technical Field The present invention relates to an assembly comprising a deformable sheet (foil) and a magnetic member, and the use of said assembly as a surface material in a vehicle interior. Background WO 2019/115053 A1 discloses an assembly comprising a support and a deformable membrane, wherein the support comprises a displaceable stamp (stamp) or actuator that moves part of the surface of the support for deformation of the membrane. EP 3 851,325 A1 discloses a deformation surface device comprising a support, a movable protruding member, a sensor and a deformable membrane, wherein the sensor is configured to sense the proximity of the device and the protruding member can stretch the deformable membrane away from the support to form a pocket for holding the device. Technical problem to be solved by the invention The prior art assembly requires a movable member as an actuator to deform the surface sheet (deform). The invention is based on the problem of providing a surface sheet which is deformable without using a movable member as an actuator and without the need for the actuator to be in direct contact with the sheet. Disclosure of Invention The problem on which the present invention is based is solved by replacing the mechanical interactions in the prior art products with magnetic interactions. In particular, the problem is solved by providing an assembly comprising a reversibly deformable sheet and a magnetic member, wherein the sheet is deformable by using a magnetic field as an actuator. The present application encompasses the following aspects. [1] An assembly comprising a sheet and a magnetic member, wherein the sheet is polymer-based and reversibly deformable by interaction of a magnetic field with the magnetic member to form protrusions and/or depressions. [1-1] The assembly of aspect [1], wherein the sheet is reversibly stretchable to at least 120% of its original length, preferably to at least 120% of its original length both in a first direction and in a second direction perpendicular to the first direction. [1-2] The assembly according to any of the preceding aspects, wherein in a test according to DIN 53 354 the sheet exhibits an elongation of at least 20% under an elongation force of 50N, preferably an elongation of at least 50% under an elongation force of 100N, preferably both in a first direction and in a second direction perpendicular to the first direction. [1-3] The assembly according to any one of the preceding aspects, wherein a partial region of 2 cm x 2 cm of the sheet is reversibly deformable to form a deformation, i.e. a protrusion or depression having a height or depth, respectively, of at least 200 μm with respect to the plane of the sheet outside the partial region. [1-4] The assembly according to aspects [1-3], wherein the reversible deformation is at least 1 mm, preferably at least 3mm, at a first location in the partial region relative to a second location outside the partial region, wherein the distance between the first and second locations is less than 5 mm. [1-5] The assembly according to any one of the preceding aspects, wherein the sheet comprises at least 50 mass% of an elastomer. [1-6] The assembly according to any of the preceding aspects, wherein the polymer is selected from polyolefin, polyurethane, polyvinyl chloride or a combination thereof, preferably polyvinyl chloride. The assembly of any of the preceding aspects, wherein the source that generates the magnetic field is not part of the assembly. [1-8] The assembly according to any one of the preceding aspects, wherein the assembly consists of the sheet and the magnetic member. [1-9] The assembly according to any one of the preceding aspects, wherein the magnetic member is contained in the sheet or arranged outside the sheet, preferably on the B-face surface of the sheet, more preferably directly attached to the B-face surface of the sheet. [1-10] The assembly according to any one of the preceding aspects, wherein the magnetic member is a printed structure, preferably having a thickness of less than 30 μm. [1-11] The assembly according to any one of the preceding aspects, wherein the sheet comprises an optically active surface, wherein deformation of the sheet results in an optical effect due to a change in the angle of observation upon deformation. [2] The assembly of aspect [1], wherein the magnetic member is a plurality of magnetic particles. [2-1] The assembly according to aspect [2], wherein the magnetic particles are nanoparticles or microparticles. [2-2] The assembly according to any one of the preceding aspects, wherein the magnetic particles are embedded in the flakes. [2-3] The assembly according to any one of the preceding aspects, wherein the magnetic particles are contained in a layer applied to the sheet or a part thereof. [2-4] The assembly according to any one of the preceding aspects, wherein the content of the magnetic particles