WO2014151414A2 - Article de ruban de film amovible - Google Patents

Article de ruban de film amovible Download PDF

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Publication number
WO2014151414A2
WO2014151414A2 PCT/US2014/025681 US2014025681W WO2014151414A2 WO 2014151414 A2 WO2014151414 A2 WO 2014151414A2 US 2014025681 W US2014025681 W US 2014025681W WO 2014151414 A2 WO2014151414 A2 WO 2014151414A2
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WO
WIPO (PCT)
Prior art keywords
article
adhesive
facing
facing adhesive
substrate
Prior art date
Application number
PCT/US2014/025681
Other languages
English (en)
Other versions
WO2014151414A3 (fr
Inventor
Josh M. BOGNER
Robert W. Schneider
Original Assignee
Avery Dennison Corporation
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 Avery Dennison Corporation filed Critical Avery Dennison Corporation
Publication of WO2014151414A2 publication Critical patent/WO2014151414A2/fr
Publication of WO2014151414A3 publication Critical patent/WO2014151414A3/fr

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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
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • 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
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
    • C09J2301/1242—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape the opposite adhesive layers being different
    • 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
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/412—Additional features of adhesives in the form of films or foils characterized by the presence of essential components presence of microspheres
    • 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
    • C09J2433/00—Presence of (meth)acrylic polymer
    • 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
    • C09J2453/00—Presence of block copolymer
    • 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
    • C09J2467/00—Presence of polyester
    • C09J2467/006—Presence of polyester in the substrate

Definitions

  • the present subject matter relates to articles that can be securely adhered to a substrate such as a wall and selectively released therefrom by use of a pull tab.
  • a substrate such as a wall
  • a particular example of such articles is a wall hook.
  • hangers which may be secured to a wall without nails so as to avoid making holes in the walls, cracking plaster, or otherwise damaging the wall surface.
  • Such hangers have also been sought in order to permit the hanging of objects on fragile surfaces, such as marble, glass or tile, which would be irreparably damaged by conventional hangers using nails.
  • certain adhesive hangers are known which are satisfactory, many suffer from disadvantages, such as their inability to support objects substantially heavier than ten pounds, and their difficulty in removal, particularly without damage to an underlying surface.
  • Adhesive hangers are also known which include a movable enclosure that provides access to a gripping member which is mechanically attached to adhesive within the hanger. Such hangers are removed by moving or positioning an enclosure to reveal the gripping member which a user then pulls to dislodge the adhesive.
  • a need remains for an improved article and removal strategy which is simple, inexpensive, and does not involve slideable or moveable enclosures.
  • a need remains for an adhesive article which can be securably attached to a wall or other substrate and which can be readily removed without damaging the surface.
  • a need also exists for an adhesive article that does not require solvents, heat, or complicated operations to remove the article after adherence.
  • the present subject matter provides a removable article comprising a carrier defining a first face and an oppositely directed second face.
  • the article also comprises a substrate- facing adhesive disposed on the first face of the carrier.
  • the article also comprises an article-facing adhesive disposed on the second face of the carrier.
  • the article comprises a structural member disposed on and contacting the article-facing adhesive.
  • the carrier includes a carrier portion extending beyond an edge of at least one of the substrate-facing adhesive, the article-facing adhesive, and the structural member.
  • the present subject matter provides a removable article comprising a polymeric carrier defining a first face and an oppositely directed second face.
  • the article also comprises a substrate-facing adhesive disposed on the first face of the carrier.
  • the article additionally comprises an article-facing adhesive disposed on the second face of the carrier.
  • the article also comprises a structural member disposed on and contacting the article-facing adhesive.
  • the substrate-facing adhesive generally exhibits a lower tackiness than the article-facing adhesive.
  • the present subject matter provides a method of treating an adhesive article having a carrier, two layers or regions of adhesive on oppositely directed faces of the carrier, and a structural member disposed on and contacting one of the adhesive layers.
  • the method comprises exposing at least one of the adhesive layers to electron beam radiation.
  • Figure 1 is a schematic, exploded perspective view of a removable film tape article in accordance with the present subject matter.
  • Figure 2 is a schematic partial cross-sectional view of the removable film tape article of Figure 1.
  • Figure 3 is a schematic partial cross-sectional view of the removable film tape article of Figures 1-2 being removed from a vertically oriented substrate.
  • the present subject matter relates to adhesive articles which can be securely attached to a substrate by an adhesive incorporated in the article, and selectively released from the substrate by actuation of a pull tab also incorporated in the article.
  • the articles generally comprise a polymeric carrier defining a first face and an oppositely directed second face.
  • An effective amount of a substrate- facing adhesive is disposed on the first face of the polymeric carrier, typically in a layer form.
  • Disposed on the second face of the carrier is an effective amount of an article-facing adhesive.
  • the article-facing adhesive is typically in the form of a layer on the second face of the carrier.
  • the articles also comprise one or more structural member(s) such as hooks that are in contact with and adhered to the layer or region of the article-facing adhesive.
  • An optional release liner or protective layer can be provided to cover the otherwise exposed face of the substrate-facing adhesive prior to use.
  • the polymeric carrier extends beyond an edge or peripheral region of the adhesives, and typically also extends beyond the structural member(s) to thereby facilitate grasping of the carrier.
  • the article is adhered to a substrate of interest such as a wall by orienting the substrate-facing adhesive toward the wall and then contacting that adhesive with the wall.
  • the substrate-facing adhesive provides a secure adhesive bond between the wall and the structural member(s).
  • the article can be readily removed from the wall by grasping an exposed region or end of the polymeric carrier constituting the pull tab, and pulling that member away from the wall. Displacement of the carrier and substrate-facing adhesive from the wall results in separation of the substrate-facing adhesive from the wall.
  • particular compositions are used for the substrate-facing adhesive and the article-facing adhesive, which may be the same or different from one another.
  • particular configurations are used for the adhesive face for contacting the substrate of interest.
  • Particular embodiments are provided for the carrier and its pull tab portion.
  • the substrate-facing adhesive is typically a removable adhesive.
  • a "removable adhesive” is defined herein as an adhesive which can be readily repositioned and which exhibits residue-free removability. That is, upon removal from most substrates, the adhesive does not leave any visible residue as to its previous contact and/or adherence with the substrate.
  • the removable adhesive comprises a rubber based pressure sensitive adhesive.
  • the rubber based adhesives are typicaiiy hot melt or solvent pressure sensitive adhesives.
  • the removable adhesive comprises one or more rubber elastomers and a tackifier.
  • the ru bber e!astomer(s) is generally present in an amount from about 20% to about 48%, or from about 25% to about 40%, or from about 28% to about 37% by weight of the removable adhesive.
  • Useful rubber elastomers include the block polymers of styrene and dienes, as well as ethylene-propylene elastomers, including diene terpo!ymers, styrene olefin copolymers like styrene ethylene, propylene or butylene block polymers. Styrene diene polymers are particularly useful, such as styrene isoprene copolymers and styrene butadiene copolymers.
  • the rubber elastomer comprises a mixture of triblock and diblock copolymers.
  • the rubber elastomers are generally styrene isoprene or styrene butadiene block copolymers.
  • the triblock content is typically from about 30% to about 70%, or from about 35% to about 65%, or from about 40% to about 60% by weight of the rubber elastomer.
  • the diblock content is from about 70% to about 30%, or from about 65% to about 35%, or from about 60% to about 40% by weight of the rubber elastomer.
  • the tackifier system of this embodiment includes of tackifiers that are preferentially miscibie with at least the po!ydiene having the highest glass transition temperature, for example., poiyisoprene.
  • the polymers used in formulating the pressure sensitive adhesives are based on natural and/or synthetic elastomeric polymers.
  • AB AB ; ABA and (AB)x block copolymers wherein x has a value of 3 or more and wherein A is a block comprising at least one monoalkenyl arene, preferably styrene, alpha methyl styrene, vinyl toluene and the like, and B is an elastomeric conjugated diene block, preferably a polybutadiene or a polyisoprene block. Preferably at least one is based on polybutadiene blocks and one other is based on polyisoprene blocks. These include, but are not limited to, homopolymers, block, random or multi-armed copolymers, and mixtures thereof.
  • polystyrene-butadiene synthetic polyisoprene
  • random styrene-butadiene polymers random styrene-butadiene polymers
  • SB styrene-butadiene
  • SI styrene-isoprene
  • SI styrene-isoprene-styrene
  • elastomeric polymers which can be used in certain embodiments of the present subject matter include linear SIS/SI block copolymers known as KR.ATO ® D-1107 and D- 1112, SBS/SB block copolymers known as K RATON ® D-1101, D-1102 and DX-1300, and an (Sl)x block copolymer known as KRATON ® D-132.0X, all manufactured and sold by Shell Chemical Company, and an SB block copolymer known as SOLPRE E ® 12.05 manufactured and sold by Dynasol Elastomers. As indicated, in many of the SIS or SBS block copolymers, there are respectively present SI or SB components.
  • Certain elastomers such as the ethylene-propylene diene rubbers, styrene- ethylene/butyiene, styrene block copolymers, styrene-ethylene/propylene-styrene block copolymers and the like, may also be used.
  • Tackifier additives for certain polyisoprene components are described in US Patent No. 3,577,398 and US Patent No. 3,692,756. These hydrocarbons range from materials that are normally liquid at room temperature to those that are normally solid at room temperature and typically contain 40% or more by weight polymerized dienes.
  • the dienes are typically piperyiene and/or isoprene. They are available from Total as the WINGTACK ® family of resins.
  • cyclohexane rings for example, the REGALREZTM family of resins manufactured by Eastman Chemical Company such as REGALREZTM 1018, 1033, 1065, 1078 and 1126, and REGALITETM R-100, and the ARKON family of resins from Arakwa Chemical such as Arkon P-85, P-100, P-115 and P-125), hydrogenated polycyclic resins (typically dicyclopentadiene resins such as ESCOREZTM 5300, 5320, 5340 and 5380 manufactured by Exxon) and the like.
  • REGALREZTM family of resins manufactured by Eastman Chemical Company such as REGALREZTM 1018, 1033, 1065, 1078 and 1126, and REGALITETM R-100
  • ARKON family of resins from Arakwa Chemical such as Arkon P-85, P-100, P-115 and P-125
  • hydrogenated polycyclic resins typically dicyclopentadiene resins such as ESCOREZTM 5300, 5320
  • rosins there can be also added rosins, rosin esters, polyterpenes and other tackifiers that are compatible to some degree with the poiyisoprene and poiybutadiene phases.
  • Other additives include plasticizer oils such as SHELLFLEX 371 manufactured by Shell Lubricants and KAYDGL ® mineral oil available from Sonneborn Products which are soluble in both the poiyisoprene and poiybutadiene phases.
  • the tackifier system may be present in an amount, based on the total weight of tackifier system and elastomers, of from about 40% to about 80% by weight, or from about 50% to about 70% by weight, or from about 60% to about 70% by weight.
  • the substrate-facing adhesive also comprises one or more fillers.
  • the filler is typically present in an amount less then 40% by weight of the adhesive (excluding solvent). In one embodiment, the filler is present in an amount from about 5% to about 40%, or from about 10% to about 35%, or from about 25% to about 35% by weight.
  • the percentage range may be combined. Combinations of fillers may be used. When a combination of fillers is used, the combined amount is reflected in the above percentages.
  • the filler includes carbon black, calcium carbonate, titanium dioxide, clay, diatomaceous earth, talc, mica, barium sulfate, aluminum sulfate, silica, or mixtures of two of more thereof.
  • a useful filler combination includes an anti-blocking agent, which is chosen depending on the processing and/or use conditions.
  • anti-blocking agents include for example silica, talc, diatomaceous earth, and any mixtures thereof.
  • the filler particles may be finely divided substantially water-insoluble inorganic filler particles.
  • the finely divided substantially water-insoluble inorganic filler particles can include particles of metal oxides.
  • the metal oxide constituting the particles may be a simple metal oxide (i.e., the oxide of a single metal) or it may be a complex metal oxide (i.e., the oxide of two or more metals).
  • the particles of metal oxide may be particles of a single metal oxide or they may be a mixture of different particles of different metal oxides,
  • suitable metal oxides include alumina, silica, and titania. Other oxides may optionally be present in minor amount. Examples of such optional oxides include, but are not limited to, zirconia, hafnia, and yttria. Other metal oxides that may optionally be present are those which are ordinarily present as impurities such as for example, iron oxide. For purposes of the present specification and claims., silicon is considered to be a metal.
  • the particles are particles of alumina., most often the alumina is alumina monohydroxide. Particles of alumina monohydroxide, AIO(OH), and their preparation are known.
  • the filler creates a physical crosslinking system that increases cohesive strength of the substrate-facing adhesive.
  • the filler reduces active sites for adhesion that reduce the removal force.
  • the filler has a surface chemistry that allows for bonding to create or promote a physical crosslinking network within the substrate-facing adhesive.
  • the outer surface of the filler particulates for example can be hydroxyl functionalized to aid in bonding.
  • the substrate-facing adhesive can be cured and/or crosslinked.
  • the adhesive can be cured and/or crosslinked by exposure to electron beam, UV light, and/or other radiation sources. Curing and/or crosslinking can also be effected by thermal means. Incorporation of one or more photoinitiators in the adhesive is contemplated.
  • the substrate-facing adhesive can comprise additional components such as, but not limited to antioxidants, solvent(s), plasticizer oils, flame retardants, optical brighteners, and combinations thereof.
  • An example of a suitable solvent is toluene.
  • An example of a commercially available plasticizer is STAYBELITETM Ester 3-E Ester of Hydrogenated Rosin, available from Eastman Chemical of the Netherlands.
  • An example of a commercially available flame retardant is SAYTEX ® 8010 Flame Retardant from Albermarle Corporation of Baton Rouge, Louisiana.
  • the present subject matter also includes the use of particular foamed or low density adhesive compositions for the substrate-facing adhesive.
  • adhesives can be deposited upon and/or disposed alongside a face of the carrier and in relatively high thicknesses.
  • the adhesives can be pressure sensitive adhesives.
  • the adhesives exhibit excellent gap-filling properties, while concurrently providing pressure sensitive adhesive characteristics.
  • particular proportions of expanda ble polymeric hollow microspheres are incorporated into the substrate-facing adhesive.
  • the hollow polymeric spheres employed are typically of the type disclosed in U.S. Patent No.
  • 3,615,972 which describes various vinyl polymers containing a hydrocarbon liquid that volatilizes at a temperature slightly below the softening point of the polymeric spheres.
  • the polymeric microspheres mentioned can be added to an adhesive system after the adhesive matrix has been polymerized.
  • Microspheres and their methods of preparation are described in U.S. Patents No. 3,615,972, 4,075,138, and 4,287,308.
  • the microspheres are available from the Pierce & Stevens Company under the trade name MIC OLITE in unexpanded form and MIRALITE in expanded form.
  • Similar microspheres are available from Kema Nord Plastics under the trade name EXPANCEL, from Matsomoto Yushi Seiyaku under the trade name MICROPEARL, and formerly from Dow Chemical Company under the trade name SARAN.
  • EXPANCEL Kema Nord Plastics
  • MICROPEARL Matsomoto Yushi Seiyaku
  • MICROPEARL formerly from Dow Chemical Company under the trade name SARAN.
  • SARAN trade name
  • the microspheres In expanded form the microspheres have a specific density of approximately 0.01-0.04 g/cm, typically 0.02-0.036 g/cc.
  • the dry unexpanded microspheres have a particle size in a range of from 10 to 16 microns.
  • An example of a particular type of commercially available microspheres which can be used in the present subject matter is EXPANCEL 031 DU 40 from AkzoNobel.
  • the various adhesive compositions can utilize varying weight proportions of the expanda ble microspheres, a typical weight proportion is from 0.1% to 12% and more particularly from 1% to 6% of microspheres (by dry weight) based upon the weight of the adhesive.
  • the microspheres can be used at a weight proportion of 1% to 10%. Lower proportions are contemplated.
  • the article-facing adhesive is generally a removable adhesive.
  • the present subject matter includes the use of one or more permanent adhesives as the article-facing adhesive.
  • the article-facing adhesive comprises one or more rubber elastomers and tackifier(s) as previously described herein.
  • the article-facing adhesive may optionally comprise one or more fillers as described herein.
  • the present subject matter also includes versions in which the article-facing adhesive is free of fillers.
  • the article-facing adhesive may be a high molecular weight crosslinked acrylic adhesive.
  • HPA 1902 An example of a commercially available adhesive suitable for certain versions of the present subject matter is HPA 1902, from Avery Performance Polymers of Painesville, Ohio.
  • the article-facing adhesive and the substrate-facing adhesive exhibit particular tack levels relative to one another. That is, in certain versions the adhesion level of the article-facing adhesive is greater than the adhesion level of the substrate-facing adhesive. And, in other versions of the subject matter, the adhesion level of the substrate-facing adhesive is greater than the adhesion level of the article-facing adhesive.
  • the articles of the present subject matter also comprise a polymeric carrier or film.
  • the polymeric carrier is disposed between layers or regions of the substrate-facing adhesive and the article-facing adhesive.
  • the carrier can be transparent, translucent, or opaque.
  • the polymeric carrier is in the form of a polyethylene terephthalate (PET) film.
  • Carrier films of the present subject matter generally have a thickness of greater than about 1 mil, and more particularly greater than 2 mils or more. A non-limiting maximum thickness for the carrier is about 10 mils.
  • a carrier film may also be formed from multiple layers of PET. Thin PET layers by themselves may not be able to withstand mechanical forces in certain end use applications which can lead to cracking of the PET film.
  • Opacification of the carrier film may be desirable in certain versions of the subject matter.
  • a variety of additives, in combination or alone, may be used to opacify the carrier film, including inorganics such as CaC0 3 , ZnO, BaS0 4 or Ti0 2 .
  • micro-voiding it is meant that small voids or cavities can form within the film. This micro-voiding can contribute to the opacity of the film but may also weaken the film. If excessive, micro-voiding can contribute to exfoliation of the film during environmental aging.
  • Exfoliation means that the carrier film fails within itself through a cohesive mechanism wherein layers or pieces of the film are readily removed from the carrier film.
  • the extent of micro-voiding can also be affected by the carrier film manufacturing conditions, molecular orientation, heat set temperatures and use of lower molecular weight polymers, all of which can render the carrier film more susceptible to exfoliation.
  • a preferred additive for opacifying the carrier film is Ti0 2 .
  • BaS0 4 can also be used to opacify the film, but under certain conditions and/or levels it can contribute to exfoliation of the carrier film.
  • the carrier film is at least 50% opaque and typically contains at least 5% by weight of an additive with levels up to 10% or more often being employed.
  • Opacifying additives can typically be added via commercially obtained concentrates, or compounded via methods well known in the art. Alternatively, they can be added to the carrier during polymerization. [0055] However, it will be appreciated that the present subject matter utilizes polymeric carriers that are transparent or substantially so. Transparent carriers are not visibly apparent and may promote the aesthetic and design aspects of the various articles of the present subject matter.
  • one or both faces of the polymeric carrier are treated.
  • Treatments can include corona treatment, plasma treatment, flame treatment, application of print or adhesive receptive coatings such as primers, and combinations thereof.
  • coloring and/or opacifying treatments may be performed upon one or both faces of the carrier, such as to produce a transparent or clear carrier and white opaque carrier.
  • the present subject matter articles also include one or more structural member(s) that are adhered to the article-facing adhesive.
  • the structural members can be provided in a wide array of different configurations, shapes, and sizes. Representative non-limiting examples include hooks, hangers, posts, mounting plates, brackets, buttons, clasps, and outwardly extending members including shelfs, supports, and anchors.
  • the structural members can also include combinations of these components. It will be appreciated that although certain versions of the present subject matter are described as providing wall mounted hooks, the subject matter is applicable to an extensive number of other applications.
  • Figures 1-3 schematically illustrate a removable film tape article in accordance with the present subject matter.
  • Figure 1 illustrates a removable article 1 in accordance with the present subject matter.
  • the article 1 comprises a polymeric carrier 20 defining a first face 22 and an oppositely directed second face 24.
  • the article 1 also comprises a layer of a substrate-facing adhesive 10 disposed along and typically in contact with the first face 22 of the carrier 20.
  • the substrate-facing adhesive 10 defines a first face 12 and an oppositely directed second face 14.
  • the article 1 additionally comprises a layer of an article-facing adhesive 30 disposed along and typically in contact with the second face 24 of the carrier 20.
  • the adhesive 30 defines a first face 32 and an oppositely directed second face 34.
  • the article 1 also comprises a structural member 40.
  • the structural member 40 defines a first face 42 which is disposed along and typically in contact with the second face 34 of the adhesive layer 30.
  • the structural member 40 also defines a second face 44, generally oppositely directed from the first face 42.
  • the member 40 in the version shown in Figure 1, includes a hook member 46.
  • the article 1 also includes a pull tab.
  • the pull tab may be incorporated or provided by the article in a variety of fashions.
  • a pull ta b is provided by an outwardly extending portion of the carrier film 20, shown in Figure 1 as portion A.
  • the outwardly extending portion A extends beyond on edge or peripheral region of at least one of (i) the substrate-facing adhesive 10, (ii) the article-facing adhesive 30, and/or (iii) the structural member 40.
  • the pull tab portion A extends beyond the edge or peripheral regions of all of (i)-(iii).
  • the pull tab A extends in a downward direction from the noted edges and peripheral regions.
  • Figure 2 is another schematic view of a partial cross section of the article 1.
  • the various components, i.e., 10, 20, 30, and 40, are depicted in an assembled configuration in contrast to the exploded depiction in Figure 1.
  • Figure 2 further reveals a downward extension of the pull tab portion A of the carrier film 20 beyond the edges of the adhesive layers 10 and 30 and the structural member 40.
  • Figure 3 is another schematic partial cross section of the article 1 adhered to a wall 5.
  • Figure 3 illustrates a removal operation of the article 1 from the wall by pulling the pull tab portion of the carrier film 20.
  • separation of the substrate-facing adhesive layer 10 and the wall is promoted by pulling the carrier film 20 in the direction C, which is at an angle B from the wall 5.
  • the angle B can be from about 1° to 90° or more.
  • relatively large angles, e.g., angle B may be precluded due to obstruction from lower regions of the structural member 40.
  • excellent removal of an article from a substrate occurs at B angles within a range of 60° to 120°.
  • An optional release liner or layer may also be provided.
  • the liner covers or is disposed on an otherwise exposed face of the substrate-facing adhesive.
  • the liner protects the adhesive face prior to use. Upon application of the article to a substrate of interest, a user removes the liner from the adhesive face or layer.
  • the release liner is composed of a release coating and a liner.
  • the liner may be any useful liner which provides the strength and properties needed to provide support and release properties.
  • the liner may be any liner known to be useful such as paper or polymeric film liners. In one embodiment, the liner has lay flat properties.
  • the liner has, in one case, a machine glaze or finish.
  • the release coating of the release liner provides a releasable bond with the adhesive.
  • the release coating may be any composition which provides the necessary releasable bond strength.
  • the release coating is a silicone release coating.
  • the release coating is prepared by curing silicone polymers in the presence of a control release agent.
  • the release coating in one embodiment, is prepared with a cross linking agent.
  • the cross linking agent is a reactive polysiloxane, such as a polydialkyl or polyhydroalkyl siloxane.
  • the components of the silicone release coating are typically present in an amount up to about 40%, or preferably from about 50% to about 75% by weight of the solvent release coating.
  • the polysiloxane is generally present in an amount of at least 21%, preferably from about 25% to about 50% by weight.
  • the cross linking agent is present in an amount less than about 10% by weight.
  • the release coating may be applied in a solvent, solvent-less or emulsion form.
  • the release coating may be cured by any known curing process, e.g. thermal, radiation, etc., to form the release coating.
  • the curing may be catalyzed by silicone soluble complexed compounds of Group VIII transition metals, such as platinum.
  • An example of a commercially available control release agent is GE SS-4335, a silicone control release agent in unreactive solvent.
  • An example of a useful polysiloxane is GE SS-4331, a vinyl terminated polydimethyl siloxane.
  • An example of a useful cross linking agent is GE SS-4300C, a polymethyl vinyl siloxane.
  • An example of the catalyst is SS-8010 catalyst in toluene. These materials are available commercially from General Electric Company's Silicone Products Division. Similar silicone products are available under the Tradename SYL-OFF from Dow Corning Corporation.
  • the present subject matter also relates to methods of treating one or more adhesive layers of the articles described herein. Treating may involve at least partially crosslinking and/or curing of one or more adhesive layer(s) to selectively modify one or more of its characteristics or properties such as tack or adhesive strength. For example, such treating can be performed to increase cohesive strength of a rubber based adhesive, reduce adhesion, and thus improve removability, and/or increase shear resistance.
  • the treatment methods involve exposing an adhesive layer of an article to electron beam radiation.
  • the present subject matter includes a wide array of treatment methods using a variety of adhesive compositions, in certain embodiments it may be beneficial to utilize a rubber based adhesive and expose the adhesive to electron beam radiation to alter its properties.
  • the treatment methods are typically performed during and/or after manufacturing of the adhesive article and prior to use, such as use by a consumer or other user. Examples
  • 180° peel adhesion was measured using the formed adhesive samples. 180° peel adhesion was measured in accordance with PSTC-1 using 2 mil PET strips. Table 2 summarizes the results of this testing.
  • Table 3 summarizes the parameters used during the 180° peel measurements. Table 3: 180° Peel Measurement Parameters
  • Loop tack was measured using the formed adhesive samples. Loop tack was measured using sample strips that were 1 inch wide by 8 inches in length using stainless steel as the substrate at a draw rate of 20 inches/minute, according to Loop Tack Test L-1B2, using an Instron Universal Tester. Loop tack values were taken to be the highest measured adhesion value observed during the test. The results are set forth in Table 4, below.
  • Table 5 summarizes the parameters used during the loop tack measurements.
  • a SIS-based rubber adhesive was prepared using the formulation set forth below in Tabl Table 6: Formulation of Example 2 Adhesive
  • Tables 8 and 9 present the results of those 180° peel measurements.
  • Table 10 summarizes the parameters used during the testing summarized in Tables 8 and 9. Table 10: 180° Peel Measurement After Dwell Parameters
  • Table 15 summarizes the static shear measurement parameters for the testing of Tables 13 and 14.
  • adhesive compositions containing expanda ble microspheres were prepared. Samples of the resulting compositions then subjected to testing to indicate adhesion strength.
  • Weight percentages referring to dry weight of microspheres and based upon weight of adhesive.
  • Samples (1.2 inches by 3 inches) were prepared from the adhesive formulation noted in Table 16 and deposited on PET carrier films. The adhesive was deposited at a coating thickness of about 5 mils. The samples were maintained at 120° F for 2 hours. After such dwelling, the samples were adhered to either a flat painted drywall substrate or a gloss painted drywall substrate (all substrates vertically oriented). A load of 5.5 pounds was attached to each sample.
  • a standard tackified SIS rubber adhesive formulation was filled with 0 to 10% expand microspheres per dry mass and samples were labeled E0 to E10 in regard to percent loading.
  • a rubber adhesive was prepared utilizing SIS rubber block copolymer and hydrocarbon resin tackifier. The adhesive was then loaded with sulfur-functional photoinitiator, 031-DU 40 EXPANCEL expanding microspheres, and carbon black dispersed in STAYBELITE ester resin. The samples were coated using comma coating technology and directly deposited on PET carrier with an uncoated filmic edge exposed. The adhesive was then coated on a second side with a tackified acrylic adhesive with a second uncoated filmic edge exposed to facilitate removal.
  • Table 25 summarizes the composition of Samples A-H used in this example.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Package Frames And Binding Bands (AREA)

Abstract

L'invention concerne un article revêtu d'adhésif au dos, amovible. L'article utilise des compositions adhésives particulières et une configuration de tirette pour fournir des articles attractifs de façon esthétique, fixable et facilement retirable tels que des crochets muraux.
PCT/US2014/025681 2013-03-15 2014-03-13 Article de ruban de film amovible WO2014151414A2 (fr)

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US3577398A (en) 1966-06-09 1971-05-04 Goodyear Tire & Rubber Synthetic resin
US3615972A (en) 1967-04-28 1971-10-26 Dow Chemical Co Expansible thermoplastic polymer particles containing volatile fluid foaming agent and method of foaming the same
US3692756A (en) 1970-07-02 1972-09-19 Goodyear Tire & Rubber Hydrocarbon-derived resins having low softening point
US4075138A (en) 1976-01-16 1978-02-21 The Dow Chemical Company Polymerization process and vinylidene chloride microspheres produced thereby
US4287308A (en) 1980-02-14 1981-09-01 Matsumoto Yushi-Seiyaku Co., Ltd. Process for preparing a thermo-expandable microspheres

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US6866928B2 (en) * 2002-04-08 2005-03-15 3M Innovative Properties Company Cleanly removable tapes and methods for the manufacture thereof
US20040109096A1 (en) * 2002-12-05 2004-06-10 3M Innovative Properties Company Overlay mounting system for display
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US3577398A (en) 1966-06-09 1971-05-04 Goodyear Tire & Rubber Synthetic resin
US3615972A (en) 1967-04-28 1971-10-26 Dow Chemical Co Expansible thermoplastic polymer particles containing volatile fluid foaming agent and method of foaming the same
US3692756A (en) 1970-07-02 1972-09-19 Goodyear Tire & Rubber Hydrocarbon-derived resins having low softening point
US4075138A (en) 1976-01-16 1978-02-21 The Dow Chemical Company Polymerization process and vinylidene chloride microspheres produced thereby
US4287308A (en) 1980-02-14 1981-09-01 Matsumoto Yushi-Seiyaku Co., Ltd. Process for preparing a thermo-expandable microspheres

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11078383B2 (en) 2017-08-25 2021-08-03 3M Innovative Properties Company Adhesive articles permitting damage free removal
US11898069B2 (en) 2017-08-25 2024-02-13 3M Innovative Properties Company Adhesive articles permitting damage free removal

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