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WO2010063622A1 - Tampon adhésif - Google Patents

Tampon adhésif Download PDF

Info

Publication number
WO2010063622A1
WO2010063622A1 PCT/EP2009/065801 EP2009065801W WO2010063622A1 WO 2010063622 A1 WO2010063622 A1 WO 2010063622A1 EP 2009065801 W EP2009065801 W EP 2009065801W WO 2010063622 A1 WO2010063622 A1 WO 2010063622A1
Authority
WO
WIPO (PCT)
Prior art keywords
pillars
adhesive pad
mold
top surface
pillar
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.)
Ceased
Application number
PCT/EP2009/065801
Other languages
English (en)
Inventor
Alessandro Mattozzi
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.)
ABB Research Ltd Switzerland
Original Assignee
ABB Research Ltd Switzerland
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 ABB Research Ltd Switzerland filed Critical ABB Research Ltd Switzerland
Publication of WO2010063622A1 publication Critical patent/WO2010063622A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • 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
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous

Definitions

  • the invention relates to an ad hesive pad accordi ng to the preamble of claim 1 or 6.
  • Geckos are known for their ability to climb on walls and roofs and that ability is due to the surface structure of the toes of the gecko.
  • the adhesive mechanism of the gecko's toes has been widely studied and biomimetic adhesive surfaces have been developed. Such structures can also be useful for a gripping device handling the above mentioned delicate items, since a grip- ping device comprising such an adhesive surface can lift delicate items by the use of van der Waals forces exclusively, i.e. no actual gripping is needed.
  • US 2008025822 discloses a device and method for handling an object using one or more directional adhesive structures to adhere to the object using van der Waals forces.
  • the object of the present invention is to provide a new adhesive pad.
  • the invention relates to an adhesive pad comprising a plurality of flexible micro or nano pillars arranged on its outer surface, wherein each one of said pillars:
  • ⁇ is arranged with one end attached to said outer sur- face and the other end extending in a direction away from said outer surface
  • ⁇ has an essentially flat top surface which is inclined so that the normal to said top surface deviates from the longitudinal direction of the pillar, wherein the top surface of each one of said pillars is inclined so that the normal to the top surface is directed away from a line being normal to the outer surface and emanating from a centre point on the outer surface.
  • centre point on the outer surface refers to a point in the centre of the pillars of the outer surface, i.e. if only a part of the outer surface comprises pillars the centre point is located in the centre of that part. If the adhesive pad comprises more than one set of pillars, each one of the sets of pillars has its own centre point.
  • An adhesive pad having the above mentioned features will upon application of said pad to an object adhere to the object to which it is applied.
  • the flexible pillars of the pad will bend so that the inclined top surfaces of the pillars will be in contact with the object. Due to the fact that the top surfaces of said pillars are inclined so that the normals to the top surfaces are directed away from the centre of the outer surface the van der Walls forces acting upon the pillars' top surfaces from the surface of the object are all directed inwards, to a point on the surface of the object situated directly under the centre of the pad. This results in a steady state situation where all the forces acting on the object from the pillars of the adhesive pad are directed outwardly from said point, thus keeping the pillars in the bent state. If all inclined top surfaces of the pillars would be directed in the same direction, a steady state of bent pillars would not be obtained.
  • the adhesive pad comprises a grid-like detachment member arranged in parallel with said outer surface so that each hole in the member surrounds at least one pillar, preferably only one pillar, said member being movable in a direction perpendicular to the outer surface in the longitudinal direction of the pillars towards their top surface to detach the adhesive pad from an object to which the adhesive pad is attached when it is in use.
  • the grid-like detachment member When the grid-like detachment member is moved towards the top surface of the pillars, the member straightens the pillars and the top surfaces detach from the surface of the object.
  • the grid-like detachment member consists of a flexible material, which can be stretched and compressed in all directions parallel to the outer surface of the pad.
  • the adhesive pad comprises detachment means configured to pull the centre of the outer surface away from an object to which the adhesive pad is attached when it is in use.
  • the periphery of the outer surface is thus folded around an axis extending perpendicular outwards from the outer surface, like the folding of an umbrella.
  • the detachment means can also be used in the opposite way when attaching the adhesive pad to an object.
  • the periphery of the folded outer surface is brought in contact with the surface of the object to which it is to be attached.
  • the centre of the outer surface is pushed towards the object by means of the detachment means, the outer surface is unfolded and the pillars of the adhesive pad are brought in contact with the object.
  • the top surfaces of the pillars are dragged along the object in a direction outwards from the centre towards the periphery of the outer surface.
  • the pillars are bent in a direction inwards towards the centre of the outer surface and the inclined top surfaces of the pillars are contacting the object.
  • the pillars are displaced along the object in the opposite direction, which causes a detachment of each one of said pillars from the surface of the object.
  • the top surface is inclined with an angle within the range of 20°-70°, preferably 30°-60°, most preferred 40°-50°, with respect to the longitudinal direction of the pillar.
  • An inclined top surface provide for a large contact surface of the pillar to an object when the adhesive pad is in use.
  • the material of the pillars comprises a polymer, preferably silicone.
  • a polymer preferably silicone.
  • a polymeric material provides the necessary flexibility to achieve that.
  • the invention also relates to an adhesive pad comprising a plurality of flexible micro or nano pillars arranged on its outer surface, wherein each one of said pillars:
  • ⁇ is arranged with one end attached to said outer surface and the other end extending in a direction away from said outer surface, and ⁇ has an essentially flat top surface, which is inclined so that the normal to said top surface deviates from the longitudinal direction of the pillar, wherein the top surface of each one of said pillars is inclined so that the normal to the top surface is directed towards a line being normal to the outer surface and emanating from a centre point on the outer surface.
  • the adhesive pad comprises detachment means configured to pull the periphery of the outer surface away from an object to which the adhesive pad is attached when it is in use.
  • the periphery of the outer surface is thus folded around an axis extending perpendicular inwards from the outer surface, like the folding of an umbrella.
  • the detachment means can also be used in the opposite way when attaching the adhesive pad to an object, by closing the centre of the folded outer surface to the object to which it is to be attached. When the centre reaches the object the periphery of the outer surface is pushed towards the object by means of the detachment means, the outer surface is unfolded and the pillars of the adhesive pad are brought in contact with the ob- ject.
  • the top surfaces of the pillars are displaced along the object in a direction inwards from the periphery towards the centre of the outer surface.
  • the pillars are bent in a direction outwards towards the periphery of the outer surface and the inclined top surfaces of the pillars are contacting the object.
  • the pillars are dragged along the object in the opposite direction, which causes a detachment of each one of said pillars from the object.
  • each one of the pillars have a length of between 0.1 - 2000 ⁇ m, preferably 1 - 1000 ⁇ m, most preferred 100 - 500 ⁇ m. Pillars having lengths in the interval above show strong adhesion to all kinds of surfaces.
  • each one of the pillars have a diameter of between 0.02 - 1000 ⁇ m, preferably 0.1 - 500 ⁇ m, most preferred 1 - 100 ⁇ m. Pillars having diameters in the interval above show strong adhesion to all kinds of surfaces.
  • all the pillars have essentially the same length.
  • the adhesive pad adheres better to a smooth surface, such as a LCD panel.
  • the pillars in a first group of the pillars have essentially the same length and the pillars of at least one other group of pillars have essentially the same length, the lengths of the pillars of the first group are different from the lengths of the pillars of the at least one other group of pillars.
  • ⁇ providing a first mold, a second mold and a third mold, said first mold including a space that corresponds to the adhesive pad, said second mold including holes that correspond to pillars of said adhesive pad, said second mold further including V- shaped grooves, said third mold including V-shaped protrusions;
  • FIG. 1 shows very schematically in cross-section an adhesive pad of the invention attaching to a surface of an ob- ject
  • FIG. 1 shows very schematically in cross-section another adhesive pad of the invention attaching to a surface of an object
  • FIG. 1 shows very schematic cross-sectional view of an adhesive pad of the invention with a grid-like detachment member
  • FIG. 1 shows very schematically in cross-section an adhesive pad of the invention detaching from a surface of an object by means of a grid-like detachment member
  • FIG. 1 shows very schematically in cross-section another adhesive pad of the invention detaching from a surface of an object by means of detachment means
  • Fig 1 a very schematic planar view of an adhesive pad 1 1 of the invention is shown.
  • the adhesive pad 1 1 comprises a plurality of flexible micro or nano pillars 12 arranged on its outer sur- face 13.
  • Each one of said pillars 12 is arranged with one end attached to said outer surface 13 and the other end extending in a direction away from said outer surface 13.
  • the essentially flat top surface of each one of said pillars 12 is inclined so that the normal to the top surface is directed away from a line being nor- mal to the outer surface and emanating from a centre point 13c on the outer surface 13.
  • the arrows in Fig 1 show in which directions the normals to the top surfaces of the pillars 1 1 are directed.
  • Fig 2 a very schematic cross-sectional view of an adhesive pad 21 of the invention is shown.
  • the adhesive pad 21 in Fig 2 is similar to the adhesive pad in Fig 1 .
  • the adhesive pad 21 comprises a plurality of flexible micro or nano pillars 22 arranged on its outer surface 23.
  • Each one of said pillars 22 is ar- ranged with one end attached to said outer surface 23 and the other end extending in a direction away from said outer surface 23.
  • the essentially flat top surface 27 of each one of said pillars 22 is inclined so that the normal to the top surface 27 is directed away from a line being normal to the outer surface and emanat- ing from a centre point 23c on the outer surface 23.
  • Fig 3 a very schematic planar view of an adhesive pad 31 of the invention is shown.
  • the adhesive pad 31 comprises a plurality of flexible micro or nano pillars 32 arranged on its outer surface 33.
  • Each one of said pillars 32 is arranged with one end attached to said outer surface 33 and the other end extending in a direction away from said outer surface 33.
  • the essentially flat top surface 37 of each one of said pillars 32 is inclined so that the normal to the top surface 37 is directed towards a line being normal to the outer surface 33 and emanating from a centre point 33c on the outer surface 33.
  • the arrows in Fig 1 show how the normals to the top surfaces of the pillars 32 are directed.
  • Fig 4 a very schematic cross-sectional view of an adhesive pad 41 of the invention is shown.
  • the adhesive pad 41 in Fig 4 is similar to the adhesive pad in Fig 3.
  • the adhesive pad 41 comprises a plurality of flexible micro or nano pillars 42 arranged on its outer surface 43.
  • Each one of said pillars 42 is arranged with one end attached to said outer surface 43 and the other end extending in a direction away from said outer surface 43.
  • An essentially flat top surface 47 of each one of said pillars 41 is inclined so that the normal to the top surface 47 is directed towards a line being normal to the outer surface 43 and emanating from a centre point 43c on the outer surface 43.
  • Fig 5 shows very schematically in cross-section how an adhesive pad 51 of the invention attaches to a surface 56 of an object 55.
  • Flexible pillars 52 of the pad 51 will bend so that the inclined top surfaces 57 of the pillars 52 will be in contact with the surface 56 of the object 55. Due to the fact that the top surfaces 57 of said pillars 52 are inclined so that the normals to the top surfaces 57 are directed away from a line being normal to the outer surface 53 and emanating from a centre point 53c on the outer surface 53, the van der Waals forces acting upon the pillars' top surfaces 57 from the surface 56 of the object 55 are all directed inwards towards the centre point 53c of the outer surface 53.
  • Fig 6 shows very schematically in cross-section how an adhesive pad 61 of the invention attaches to a surface 66 of an ob- ject 65.
  • Flexible pillars 62 of the pad 61 will bend so that the inclined top surfaces 67 of the pillars 62 will be in contact with the surface 66 of the object 65.
  • Fig 7 shows very schematically a cross-sectional view of an adhesive pad 71 of the invention with a grid-like detachment member 78.
  • the pad 71 is illustrated as being a pad like that one shown in Fig 2, but the pad 71 can just as well be a pad like the pad shown in Fig 4.
  • the grid-like detachment member 78 is arranged in parallel with the outer surface 73 of the pad 71 so that each hole in the member 78 surrounds at least one pillar 72, preferably only one pillar 72, said member 78 being movable in a direction perpendicular to said member 78 along the longitudinal direction of the pillars 72 towards their top surface 77 so as to detach the adhesive pad 71 from an object when the adhesive pad 71 is in use.
  • Fig 8 shows very schematically in cross-section how an adhe- sive pad 81 of the invention detaches from a surface 86 of an object 85 by means of a grid-like detachment member 88.
  • the grid-like detachment member 88 is moved in a direction perpendicular to said member 88 along the longitudinal direction of the pillars 82 towards the pillars' 82 top surface 87.
  • the member 88 straightens the pillars 82 and the top surfaces 87 detach from the surface 86 of the object 85.
  • the grid-like detachment member can also be stretched and compressed in all directions parallel to the outer surface of the pad.
  • Fig 9 shows very schematically in cross-section how an adhesive pad 91 of the invention detaches from a surface 96 of an object 95.
  • the adhesive pad 91 comprises detachment means configured to pull the centre point 93c of the outer surface 93 away from the object 95 to which the adhesive pad 91 is attached when it is in use, with respect to the periphery 93p of the outer surface 93.
  • the periphery 93p of the outer surface 93 is thus folded towards an axis extending perpendicular outwards from the outer surface 93, like the folding of an umbrella.
  • the detachment means can also be used in the opposite way when attaching the adhesive pad 91 to an object 95, by bringing the periphery 93p of the folded outer surface 93 in contact with the surface 96 of the object 95 to which it is to be attached.
  • the periphery 93p is in contact with the surface 96 of the object 95
  • the centre 93c of the outer surface 93 is pushed towards the object 95 by means of the detachment means
  • the outer surface 93 is unfolded and the pillars 92 of the adhesive pad 91 are brought in contact with the surface 96 of the object 95.
  • the top surfaces 94 of the pillars 92 are dragged along the surface 96 of the object 95 in a direction outwards from the centre 93c towards the periphery 93p of the outer surface 93.
  • the pillars 92 are bent in a direction inwards towards the centre 93c of the outer surface 93 and the inclined top surfaces 94 of the pillars are contacting the surface 96 of the object 95.
  • the pillars 92 are dragged along the surface 96 of the object 95 in the opposite direction, which causes a detachment of each one of said pillars 92 from the object 95.
  • Fig 10 shows very schematically in cross-section how an adhesive pad 101 of the invention detaches from a surface 106 of an object 105.
  • the adhesive pad 101 comprises detachment means configured to pull the periphery 103p of the outer surface 103 away from the object 105 to which the adhesive pad 101 is attached when it is in use, with respect to periphery 103p of the outer surface 103.
  • the periphery 103p of the outer surface 103 is thus folded towards an axis extending perpendicular inwards from the centre 103c of the outer surface 103, like the folding of an umbrella.
  • the detachment means can also be used in the opposite way when attaching the adhesive pad 101 to an object 105, by bringing the centre 103c of the folded outer surface 103 in contact with the surface 106 of the object 105 to which it is to be attached.
  • the centre 103c is in contact with the surface 106 of the object 105
  • the periphery 103p of the outer surface 103 is pushed towards the object 105 by means of the detachment means, the outer surface 103 is unfolded and the pillars 102 of the adhesive pad 101 are brought in contact with the surface 106 of the object 105.
  • the top surfaces 104 of the pillars 102 are dragged along the surface 106 of the object 105 in a direction inwards from the periphery 103p towards the centre 103c of the outer surface 103.
  • the pillars 102 are bent in a direction inwards towards the periphery 103p of the outer sur- face 103 and the inclined top surfaces 104 of the pillars are contacting the surface 106 of the object 105.
  • the pillars 102 are dragged along the surface 106 of the object 105 in the opposite direction, which causes a detachment of each one of said pillars 102 from the object 105.
  • the detachment means described above can for instance be wires arranged in the adhesive pad and configured to actuate said adhesive pad in the above described folding.
  • the detachment means can also be a piezoelectric material or an alloy whose shape can be affected by electricity or heat comprised in the adhesive pad.
  • the adhesive pad of the invention is of course not limited to having a circular shape, but can have any shape.
  • the adhesive pad can comprise a plurality of pillar sets, wherein all of the pillars in each set are arranged according to the invention, i.e. the top surfaces of the pillars in each set of pillars are inclined with respect to a normal to the surface emanating from a centre point of each set of pillars on the outer surface of the adhesive pad.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Tampon adhésif (11, 21, 51, 71, 91) comprenant une pluralité de micro- ou nano-piliers flexibles (12, 22, 52, 72, 92) disposés sur sa surface extérieure (13, 23, 53, 73, 93), dans lequel chacun desdits piliers est disposé avec une extrémité fixée à ladite surface extérieure, et l'autre extrémité s'étendant dans une direction l'éloignant de ladite surface extérieure, et comporte une surface supérieure (27, 57, 77, 97) sensiblement plate qui est inclinée de sorte que la perpendiculaire à ladite surface supérieure diffère de la direction longitudinale du pilier, dans lequel la surface supérieure de chacun desdits piliers est inclinée de sorte que la perpendiculaire à la surface supérieure est orientée loin d'une droite perpendiculaire à la surface extérieure et issue d'un point central (13c, 23c, 53c, 93c) sur la surface extérieure.
PCT/EP2009/065801 2008-12-02 2009-11-25 Tampon adhésif Ceased WO2010063622A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11908408P 2008-12-02 2008-12-02
US61/119,084 2008-12-02

Publications (1)

Publication Number Publication Date
WO2010063622A1 true WO2010063622A1 (fr) 2010-06-10

Family

ID=41508680

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/065801 Ceased WO2010063622A1 (fr) 2008-12-02 2009-11-25 Tampon adhésif

Country Status (1)

Country Link
WO (1) WO2010063622A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136740A1 (fr) * 2011-04-04 2012-10-11 Buescher Peer Dispositif de fixation
WO2013034635A1 (fr) * 2011-09-07 2013-03-14 J. Schmalz Gmbh Dispositif de préhension ou de blocage et procédé de manipulation d'objets
CN104584164A (zh) * 2012-09-04 2015-04-29 大金工业株式会社 电解液以及电化学器件

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000069985A1 (fr) * 1999-05-13 2000-11-23 3M Innovative Properties Company Articles a envers adhesif
US6197419B1 (en) * 1997-09-19 2001-03-06 3M Innovative Properties Co. Blended adhesives and articles incorporating the same
WO2002062859A2 (fr) * 2001-02-07 2002-08-15 Loctite Compositions polymerisables a radicaux libres, contenant des olefines polycycliques
WO2007121450A2 (fr) * 2006-04-17 2007-10-25 Arom Technologies, Inc. Dispositif et procede permettant de manipuler un objet d'interet a l'aide d'une structure adhesive directionnelle
WO2008097571A1 (fr) * 2007-02-06 2008-08-14 World Properties, Inc. Mousses polymères conductrices, procédé de fabrication et utilisations de celles-ci

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6197419B1 (en) * 1997-09-19 2001-03-06 3M Innovative Properties Co. Blended adhesives and articles incorporating the same
WO2000069985A1 (fr) * 1999-05-13 2000-11-23 3M Innovative Properties Company Articles a envers adhesif
WO2002062859A2 (fr) * 2001-02-07 2002-08-15 Loctite Compositions polymerisables a radicaux libres, contenant des olefines polycycliques
WO2007121450A2 (fr) * 2006-04-17 2007-10-25 Arom Technologies, Inc. Dispositif et procede permettant de manipuler un objet d'interet a l'aide d'une structure adhesive directionnelle
WO2008097571A1 (fr) * 2007-02-06 2008-08-14 World Properties, Inc. Mousses polymères conductrices, procédé de fabrication et utilisations de celles-ci

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136740A1 (fr) * 2011-04-04 2012-10-11 Buescher Peer Dispositif de fixation
WO2013034635A1 (fr) * 2011-09-07 2013-03-14 J. Schmalz Gmbh Dispositif de préhension ou de blocage et procédé de manipulation d'objets
CN104584164A (zh) * 2012-09-04 2015-04-29 大金工业株式会社 电解液以及电化学器件
CN104584164B (zh) * 2012-09-04 2017-09-05 大金工业株式会社 电解液以及电化学器件

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