EP3731689A1 - Structure à adhérence améliorée - Google Patents

Structure à adhérence améliorée

Info

Publication number
EP3731689A1
EP3731689A1 EP18826297.6A EP18826297A EP3731689A1 EP 3731689 A1 EP3731689 A1 EP 3731689A1 EP 18826297 A EP18826297 A EP 18826297A EP 3731689 A1 EP3731689 A1 EP 3731689A1
Authority
EP
European Patent Office
Prior art keywords
backing layer
projections
thickness
layer
mold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP18826297.6A
Other languages
German (de)
English (en)
Inventor
Eduard Arzt
René HENSEL
Karsten Moh
Verena Nicola KÜMPER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Innocise GmbH
Original Assignee
Innocise GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Innocise GmbH filed Critical Innocise GmbH
Publication of EP3731689A1 publication Critical patent/EP3731689A1/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/026—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C2045/0094—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection moulding of small-sized articles, e.g. microarticles, ultra thin articles
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/31—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive effect being based on a Gecko structure

Definitions

  • the invention relates to a structure with improved adhesion to surfaces, in particular with improved force distribution.
  • the molecular adhesion between two objects can be enhanced or controlled by fiber-like surface structures. This principle is known as gecko effect. If a structured elastomer surface is pressed with a certain pressure force against a comparatively flat surface, van der Waals interactions can form.
  • the reverible liability ie the possibility of switching attachment and detachment, is also known from nature.
  • Verwen tion of columnar adhesive structures ie structures which consist of a plurality of columnar projections, de ren faces form the contact surface for adhesion to a top surface
  • a detachment is usually triggers that by external influences the contact surface for Surface is reduced.
  • the strength of the adhesion and also the type of detachment can be controlled by the structure of the dry-adhesive structure on the upper surface. This allows in contrast to normal adhesive joints a much higher control of the adhesion forces.
  • the object of the invention is to provide a structure which has improved adhesion and in particular a verbes serte force distribution.
  • the invention is characterized by a structure comprising a back layer, a plurality of protrusions on this backing layer, each protrusion having an end face, wherein all end faces span a common surface and the stiffness of the back layer varies towards at least one edge of the structure decreases.
  • the stiffness of the backing layer decreases toward all edges of the structure.
  • An edge of a structure is understood to mean the end of the arrangement of protrusions on the backing layer.
  • the backing layer preferably has a gradient of stiffness in the direction of the edges parallel to the adhesive surface.
  • the change in stiffness can be achieved in different ways.
  • This change is achieved in that the thickness of the back layer decreases towards at least one edge of the structure.
  • the end faces of the projections span a common surface, it is achieved by varying the thickness of the backing layer that the projections in the center of the structure are shorter, while the length of the projections increases towards the edge, the end faces of the projections still being suitable are to contact flat surfaces, since the end faces span a common surface.
  • the thickness of the backing layer decreases in the direction of at least one edge of the structure, preferably in the direction of at least two edges, in particular towards all edges. This can be achieved for example by a curved shape of the backing layer.
  • the structure in the middle has a constant thickness of the backing layer, and they only towards the edge, z. B. in the last quarter, measured on the diameter of the structure, the thickness of the backing layer decreases.
  • the thickness decreases toward the edge, it is understood that the thickness decreases at least in the area at the edge. This means that in any case at the edge of the structure, the thickness of the backing layer decreases steadily.
  • the resulting structure indicates the edges compared to the middle of the backing layer longer before cracks.
  • the structure is also suitable for adhesion to flat surfaces, and yet has an improved distribution of force.
  • the detachment first begins at the edge and then proceeds inward. As a result, a controlled detachment with improved local precision he goes.
  • the change in rigidity is achieved by modifying the modulus of elasticity of the backing layer accordingly. This can be done by a gradient within the material. This is preferably achieved in that the backing layer has at least two regions with different modulus of elasticity.
  • the backing layer is constructed in particular on the expansion from the individual areas so that a difference in the adhesive force of the structure is achieved.
  • these areas are formed as layers, in particular as layers whose perpendicular right thickness varies.
  • the rigidity of the backing layer at a certain point depends on the ratio of the different layers.
  • the thickness of the respective layers, the stiffness of the backing layer controlled who the.
  • the vertical portion of regions with a high modulus of elasticity decreases, so that the stiffness decreases. This means that the thickness of the layers changes accordingly.
  • the use of multiple layers has the advantage that the length of the projections can remain constant, which facilitates the manufacture and stability of the structures.
  • the backing layer can be made more easily multilayered, which facilitates the adjustment of rigidity for different applications.
  • the backing layer comprises 2, 3 or 4 layers with different modulus of elasticity, preferably 2 layers with different modulus of elasticity.
  • the layers do not have to extend over the entire surface of the backing layer. Preferably, the layers extend over the entire surface of the structure
  • the outermost layer can also be fixedly connected to a carrier or be part of a carrier of the structure according to the invention. Importantly, it has an impact on the adhesion of the structure.
  • the backing layer has a first layer on which the projections are arranged. Un ter of this layer, a second layer is arranged. Both layers have a common interface. If the modulus of elasticity of the first layer is greater than that of the second layer, the thickness of the second layer preferably decreases in the direction of at least one edge, while the thickness of the first layer th layer increases. This can be achieved, for example, by virtue of the fact that the boundary surface of the two layers is curved in the direction of the projections, ie is convex. If the modulus of elasticity of the first layer is higher, it is the other way around, ie the interface is correspondingly concave-shaped and the thickness of the second layer increases accordingly.
  • Parabolic, hemispherical shaped to cup-shaped or wan nenförmig is described by a straight polynomial (polynomial function with even exponents).
  • the thickness of the backing layer is constant with respect to all layers.
  • the modulus of elasticity of the first layer corresponds to the elastic modulus of the jumps before.
  • the elastic modulus of the back layer is preferably 50 kPa to 3 GPa.
  • the modulus of elasticity is preferably 50 kPa to 5 GPa, in particular 100 kPa to 1 GPa, particularly preferably 500 kPa to 100 MPa.
  • the modulus of elasticity of at least one layer is 50 kPa to 3 GPa.
  • the modulus of elasticity is preferably 50 kPa to 5 GPa, in particular 100 kPa to 1 GPa, particularly preferably 500 kPa to 100 MPa.
  • the modulus of elasticity of at least one layer is preferably 50 kPa to 20 MPa, preferably 100 kPa to 10 MPa.
  • the modulus of elasticity of the at least one high elastic modulus layer is independently thereof at least 1 MPa, more preferably 1 MPa to 3 GPa, preferably 2 MPa to 1 GPa.
  • the ratio of the moduli of elasticity of the layer with the lowest modulus of elasticity and the layer with the highest modulus of elasticity is preferably greater than 1: 2, preferably greater than 1: 100, in particular greater than 1: 500, most preferably greater than 1: 1000, in particular over 1: 1500. Such high differences have a particularly advantageous effect.
  • the thickness of the backing layer can be selected according to the application. Depending on the height of the projections, the maximum thickness may be up to 5 cm, preferably up to 3 cm. It can also be less than 1 cm, for example less than 5 mm.
  • the thickness is chosen so that ei ne corresponding improvement in the adhesive force is achieved even with variation of the thickness.
  • Be preferred is a variation of the thickness by up to 50%, starting from the maximum thickness, preferably by up to 30%, in particular by at least 5%.
  • the thickness is selected so that an improvement in the adhesive force is achieved.
  • the thickness of at least two layers for changing the stiffness preferably varies by at least 2% based on the maximum thickness of the backing layer, preferably by at least 5%, preferably by at least 30%.
  • the thickness of a layer can be at 0, if it is not present in this area. In the layer with the lowest modulus of elasticity is given to before that their minimum thickness (d) relative to the senkrech th height of the projections (L) is less than 1, preferably if it is the layer on which the projections are arranged.
  • pillars projections
  • pillars projections
  • end face pointing away from the surface. With this face, the projections come into contact with the surface to which they are to adhere.
  • the projections of each structure of the invention are columnar removablebil det. This means that it is preferably formed perpendicular to the surface projections having a stem and an end face, wherein the stem and the end face may have any cross-section (for example, circular, oval, rectangular, square, rhombic, hexagonal , pentagonal, etc.).
  • the projections are formed so that the perpendicular right projection of the end face on the base of the jump ahead with the base surface forms an overlap surface, where at the overlap surface and the projection of the overlap surface on the end face a body span, which lies completely within the projection ,
  • the overlap area comprises at least 50% of the base area, preferably at least 70% of the base area, particularly preferably the overlapping area comprises the entire base area.
  • the projections are therefore preferably not inclined be.
  • the end face is paral lel aligned with the base surface and the surface. If the faces are not aligned parallel to the surface and therefore have different vertical heights, the vertical height of the face is considered to be the vertical height of the face.
  • the end face of the projections is larger than the base, so-called “mushroom” structures.
  • the stem of the projection has an aspect ratio of height to diameter of 0.5 to 100, preferably 1 to 10, particularly preferably 1 to 5, based on its mean diameter.
  • the average diameter is understood to be the diameter of the circle which has the same area as the corresponding cross section of the projection, averaged over the entire height of the projection.
  • the end faces span a common surface.
  • the end faces can be part of a continuous area, for example a plane. It can also be a curved surface.
  • the end faces of the projections may themselves be structured to increase their surface area. In this case, the average vertical height of the end face is considered as the vertical height of the projections.
  • the vertical height of all projections in a range of 1 ym to 10 mm, preferably 1 ym to 5 mm, in particular 1 ym to 2 mm, preferably in a range of 1 ym to 1 mm.
  • the base area of the surface corresponds to a circle with a diameter between 0.1 ym to 5 mm, preferably 0.1 ym and 2 mm, in particular before given to 1 ym and 500 ym, more preferably between 1 ym and 100 ym.
  • the base is a circle having a diameter between 0.3 ym and 2 mm, preferably 1 ym and 100 ym.
  • the average diameter of the strains is preferably between 0.1 .mu.m to 5 mm, preferably 0.1 .mu.m and 2 mm, in particular preferably between 1 .mu.m and 100 .mu.m.
  • the height and the median diameter are adjusted according to the preferred aspect ratio.
  • the surface of the end face of a projection is at least 1.01 times, preferably at least 1.5 times as large as the area of the base of a projection. It may be greater by a factor of 1.01 to 20 or, for example, be 1.05 to 2 times larger in example. In a further embodiment, the end face is between 5% and 100% larger than the base area, particularly preferably between 10% and 50% of the base area.
  • the distance between two projections is less than 2 mm, in particular less than 1 mm.
  • the projections are preferably arranged periodically periodically.
  • the elastic modulus of the protrusions is preferably 50 kPa to 3 GPa.
  • the modulus of elasticity is preferably 50 kPa to 5 GPa, in particular 100 kPa to 1 GPa, particularly preferably 500 kPa to 100 MPa.
  • the materials of the projections and the backing layer can be chosen according to the requirements of the skilled person.
  • the protrusions may comprise, for example, the following materials: epoxy- and / or silicone-based elastomers, thermoplastic elastomers (TPE), polyurethanes, epoxy resins, acrylate systems, methacrylate systems, polyacrylates as homo- and copolymers, polymethacrylates as homo- and copolymers (PMMA, AMMA Acrylonitrile / methyl methacrylate), polyurethane (meth) acrylates, silicones, silicone resins, rubber such as R rubber (NR natural rubber, IR poly-isoprene rubber, BR butadiene rubber, SBR styrene-butadiene rubber, CR chloroprene rubber, NBR Nitrile rubber) M rubber (EPM ethene-propene rubber, EPDM ethylene-propylene rubber), unsaturated polyester resins, formaldehyde resins, vinyl ester
  • polyurethane (meth) acrylates for polyurethane methacrylates, polyurethane acrylates, and mixtures and / or copolymers thereof.
  • epoxy- and / or silicone-based elastomers Preference is given to epoxy- and / or silicone-based elastomers, polyurethane (meth) acrylates, polyuretanes, silicones, silicone resins (such as UV-curable PDMS), polyurethane (meth) acrylates or rubber (such as EPM, EPDM).
  • the backing layer is preferably also from one of the vorste existing materials, more preferably from the same mate rial as the projections.
  • the higher modulus layers may also be made of other materials such as plastics, metals, ceramics, preferably plastics such as thermosets or thermoplastics such as polystyrene, acrylonitrile-butadiene-styrene, polylactides, polyvinyl alcohol, polyamides such as polyamide PA 66). Preference is given to plastics which can be applied by injection molding or 3D printing.
  • the structures according to the invention are preferably prepared in Gussver.
  • the invention also relates to a process for producing a structure according to the invention.
  • a mold is provided which has a negative structure of the structure comprising protrusions and a thickness-varying backing layer.
  • the mold is filled in accordance with a curable precursor for the material of the backing layer and the projections. Thereafter, the precursor is cured depending on the material used, which can be done physically and / or chemically. For example, by heating or irradiation, for example with UV).
  • the structure is removed from the mold and optionally subjected to further processing steps Be.
  • the invention also relates to a method for producing a structure according to the invention, in which the backing layer comprises at least two regions.
  • a mold is provided which comprises a negative structure of the structure comprising protrusions and the backing layer.
  • another body is be provided, which corresponds in its dimensions to a range of forth delivering back layer. This body may be arranged on a support or be part of it.
  • a hardenable precursor is poured into the mold.
  • the further body is introduced into the mold so that it forms the later backing layer together with the precursor. It is possible that the body partially deformed and / or displaces the precursor, for example if it has a curved structure.
  • the pre-stage and the body form the backing layer after hardening.
  • the body Since the body is pressed into the preliminary stage, it can also be called Inlet.
  • the body is of a material having a higher modulus of elasticity than the material in the mold after curing.
  • the precursor is cured. Thereby, the projections and the first area are formed. Thereafter, the structure is removed from the mold.
  • the backing layer is formed by the cast structure and the additional body. The further body forms the second area of the backing layer.
  • the further body may already include several areas with un ferent modulus of elasticity.
  • the other body can be made in various ways who the. For example, it is possible to set it up via 3D printing.
  • the shape of the individual regions of the backing layer can be determined in a simple manner.
  • the production of the projections and the final structure can be carried out in one step.
  • geometries can be obtained which are not possible by means of sequential casting methods.
  • the further body is preferably concave and has in its center the highest thickness.
  • the structure of the invention provides opportunities for precise handling without heavy load on the object.
  • the adhesion with adhesive structures with lower expansion can be worked.
  • the area required for adhesion is significantly lower.
  • the invention therefore also relates to the use of the inventions to the invention structure for dry adhesion, in particular for Handling or attachment of objects via dry-adhesive adhesion.
  • area information always includes all - not mentioned - intermediate values and all imaginable subintervals.
  • FIG. 1 Schematic representation of an embodiment of the invention
  • FIG. 2 Schematic representation of an embodiment of the invention
  • FIG. 3 Schematic representation of an embodiment of the invention
  • FIG. 4 shows a schematic representation of an embodiment of the invention with a curved backing layer
  • Fig. 5 shows a schematic representation of an embodiment of the invention with a multilayer backing layer
  • FIG. 6 measurement of the adhesion force of different structures
  • Figure 7 shows a structure according to the invention in cross-section.
  • FIG. 10 shows a schematic representation of an embodiment of the invention with a multilayer backing layer
  • FIG. 11 Schematic representation of an embodiment of the invention He with multilayer backing layer.
  • Fig. 1 shows a schematic representation of a erfindungsge MAESSEN structure.
  • a backing layer 100 On a backing layer 100, a plurality of projections 110 are arranged, which each have end faces 120. The surface of the back layer without the projections is convexly curved in this embodiment.
  • Fig. 2 shows a schematic representation of a erfindungsge MAESSEN structure.
  • a backing layer 100 On a backing layer 100, a plurality of projections 110 are arranged, which each have end faces 120.
  • the surface of the backing layer without the protrusions is roof-shaped or conically shaped in this embodiment. It is also possible that the thickness of the backing layer decreases only in one dimension. In this case, the surface of the backing layer is gabled without protrusions.
  • Fig. 3 shows a schematic representation of a erfindungsge MAESSEN structure.
  • a backing layer 100 On a backing layer 100, a plurality of projections 110 are arranged, which each have end faces 120.
  • the thickness of the back layer in the middle of the structure is constant and only decreases towards the edges.
  • Fig. 4 shows a schematic representation of a erfindungsge MAESSEN structure with a curved backing layer 130 on the jumps before 110 are arranged.
  • the faces of the projections 120 are at the same height and so span a plane. Therefore, over the width of the structure D, the height of the projections varies from the lowest height L m in the middle to the highest height L a at the edge of the structure.
  • Fig. 5 shows a schematic representation of a erfindungsge MAESSEN structure with a multilayer structure of the back layer.
  • the backing layer has a first region 140 with a modulus of elasticity E2. In this area, the jumps before 110 are arranged.
  • the backing layer still has a second region 150 with a modulus of elasticity Ei. E ! > E 2 . Both regions 140, 150 are formed as layers and are arranged on each other. Its interface 160 is concave in the direction of the projections.
  • the first region has a minimum thickness of d at the center of the structure. There is also the thickness of the second area is the largest.
  • the thickness of the first region increases while the thickness of the second region decreases. If the interface is concavely curved in all directions, for such a body, the stiffness increases towards all edges.
  • the second region extends over the entire width D of the structure. The ratio of the minimum thickness d to the height of the projections is preferably less than 1.
  • Fig. 6 shows the measurement of the adhesion force of various
  • Fig. 7 shows a structure with projections on a back layer.
  • the structure was cut in half, so that the cross section can be seen.
  • the projections have egg NEN circular diameter and are periodically arranged regularly. They are arranged on a backing layer which comprises two regions, which in turn are formed as layers. It can be clearly seen that the thickness of the first area is the lowest with the protrusions in the middle. The second area forms a layer below the first area.
  • the concave curved surface is clearly visible.
  • the height of the backing layer is known throughout the structure. Only the thickness of the two layers varies.
  • Fig. 8 shows schematically the preparation of an inventive Shen structure with varying thickness of the backing layer (backing layer).
  • An appropriate mold is provided (left).
  • the pre-polymer for the material is filled and closed the mold with a lid (middle Dar position).
  • the mold is completely filled.
  • the pre-polymer is cured, for example, crosslinked. After demolding from the mold (right) the fiction, contemporary structure is obtained.
  • Fig. 9 shows schematically the preparation of an inventive Shen structure with multilayer backing layer.
  • the pre-polymer is filled (left).
  • the pre-polymer is the precursor for the material of the protrusions and the first region of the backing layer.
  • an inlet is provided on a carrier. This inlet can be produced, for example, via 3D printing. It is arranged on a support which can also form the cover of the casting mold. As much prepolymer is introduced into the mold that the mold is completely filled after insertion of the inlay (middle illustration) into the mold. Thereafter, the pre-polymer is cured and the structure demolded (right). In this way, a structure having a multilayer back layer is obtained.
  • FIG. 10 shows an embodiment of the invention with a more layered backing layer comprising a first region 170 and a second region 180.
  • the projections 110 are arranged with end faces 120.
  • the change in rigidity is achieved by having the thickness of the first region 170 lowest in the center and steadily increasing linearly toward the edge. Accordingly, the thickness of the second region 180 decreases.
  • the interface is in this case depending on the three-dimensional structure of the structure roof-shaped or conical.
  • FIG. 11 shows an embodiment of the invention with a more layered backing layer comprising a first region 190 and a second region 200.
  • the projections 110 are arranged with end faces 120.
  • the change in rigidity is achieved by having the thickness of the first region 190 in the middle lowest, remaining constant, and then steadily increasing linearly towards the edge. Accordingly, the thickness of the second region 200 decreases.
  • the border Area is in this case dependent on the three-dimensional structure of the structure roof-shaped with truncated gable or similar to a truncated cone.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne une structure à adhérence améliorée, en particulier à répartition des charges améliorée. Cela est obtenu grâce à une structure comportant des parties saillantes et une couche arrière dont la rigidité varie alors que les faces terminales définissent une surface commune.
EP18826297.6A 2017-12-27 2018-12-18 Structure à adhérence améliorée Pending EP3731689A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017131347.8A DE102017131347A1 (de) 2017-12-27 2017-12-27 Struktur mit verbesserter Haftung
PCT/EP2018/085499 WO2019129540A1 (fr) 2017-12-27 2018-12-18 Structure à adhérence améliorée

Publications (1)

Publication Number Publication Date
EP3731689A1 true EP3731689A1 (fr) 2020-11-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18826297.6A Pending EP3731689A1 (fr) 2017-12-27 2018-12-18 Structure à adhérence améliorée

Country Status (6)

Country Link
US (1) US11787982B2 (fr)
EP (1) EP3731689A1 (fr)
JP (1) JP7291962B2 (fr)
CN (1) CN111757686A (fr)
DE (1) DE102017131347A1 (fr)
WO (1) WO2019129540A1 (fr)

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US11787982B2 (en) 2023-10-17
JP7291962B2 (ja) 2023-06-16
CN111757686A (zh) 2020-10-09
JP2021507836A (ja) 2021-02-25
DE102017131347A1 (de) 2019-06-27
WO2019129540A1 (fr) 2019-07-04
US20210071046A1 (en) 2021-03-11

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