WO2023163717A1 - Articles à montage adhésifs flexibles comprenant des segments de corps reliés reliés par intermittence - Google Patents

Articles à montage adhésifs flexibles comprenant des segments de corps reliés reliés par intermittence Download PDF

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Publication number
WO2023163717A1
WO2023163717A1 PCT/US2022/018091 US2022018091W WO2023163717A1 WO 2023163717 A1 WO2023163717 A1 WO 2023163717A1 US 2022018091 W US2022018091 W US 2022018091W WO 2023163717 A1 WO2023163717 A1 WO 2023163717A1
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WO
WIPO (PCT)
Prior art keywords
adhesive
adhesive article
article
segments
flexible body
Prior art date
Application number
PCT/US2022/018091
Other languages
English (en)
Inventor
Payam KHODAPARAST
Erik M. ANDERSON
Craig D. Thompson
Kevin W. Weber
Original Assignee
3M Innovative Properties Company
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 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Priority to PCT/US2022/018091 priority Critical patent/WO2023163717A1/fr
Publication of WO2023163717A1 publication Critical patent/WO2023163717A1/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
    • 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
    • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
    • 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
    • C09J2301/302—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 being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • 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
    • C09J2301/308—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 tape or sheet losing adhesive strength when being stretched, e.g. stretch adhesive

Definitions

  • the present disclosure generally relates to peelable adhesive articles that are capable of attaching or adhering to a substrate and that can be removed from the substrate without causing damage to the substrate.
  • the present disclosure also generally relates to methods of making and using such adhesive articles.
  • the revolutionary Command® Adhesive Strip products are a line of stretch removable adhesive strips that hold strongly on a variety of surfaces (including paint, wood, and tile) and that remove cleanly - no holes, marks, or sticky residue. These products generally have utility in bonding to various surfaces or substrates for numerous applications.
  • these products include a stretch release adhesive composition disposed on tape or other backings.
  • Stretch releasable adhesives are high performance pressure-sensitive adhesives that combine strong holding power with clean removal and no surface damage.
  • Stretch releasable adhesive products are designed to firmly adhere an article, such as a hook (to hold a picture or an article of clothing) or other decorative or utilitarian element, to a surface (an adherend), yet remove cleanly when pulled away from the architectural surface at a low angle.
  • the clean removal aspect means that a tacky and/or unsightly residue is not left behind on the surface after removal of the stretch release adhesive and that no damage to the surface occurs during the removal process.
  • the adhesive layer typically remains adhered to the tape backing as the backing is stretched, but releases from the surface (adherend).
  • Peelable adhesive technology has also been introduced into products for mounting.
  • Some exemplary commercially available peelable mounting products e.g. , Jimmy HookTM products, GeckoTechTM products, Elmer’s FreestyleTM products, and Hook UmTM products
  • the mounting devices include a semi-rigid plastic backing and a hardgood (e.g., a rigid hook), both of which are integrated as a one-piece article support.
  • the rigid hook is permanently attached to a first major planar surface of the semi-rigid plastic backing .
  • the second maj or planar surface of the backing can be adhered to a wall surface .
  • the second maj or planar surface includes one or more of suction technology (e.g., numerous microsuction or nanosuction elements) and/or a frictional adhesive (in which the backing is impregnated with a rubber-based adhesive to increase friction between the substrate and backing) or dry adhesive (which relies on van der Waals forces).
  • suction technology e.g., numerous microsuction or nanosuction elements
  • frictional adhesive in which the backing is impregnated with a rubber-based adhesive to increase friction between the substrate and backing
  • dry adhesive which relies on van der Waals forces
  • Existing peelable adhesive products often do not work well on various surfaces, including, for example, painted surfaces and rough surfaces (e.g., drywall). Additionally, the existing peelable products can exhibit low shear strength and thus can hold little weight or alternatively require a relatively thick construction, which can cause an increase in the potential for damage when such products are removed from an adherend. Moreover, the mounting devices typically include a relatively rigid hardgood used to mount the desired object, which can increase the peel force necessary to remove the mounting device. This difficulty in removal often subjects the user to at least a multiple removal steps or requires the use of multicomponent constructions that tend to increase manufacturing complexity and cost. Attempts have been made to replace existing backings with those having lower stiffness (modulus) to reduce the peel force upon removal.
  • module stiffness
  • Soft, elastic backings for example, have been shown to result in lower peel forces, which correlate with appreciable stretch (strain) of the adhesive at release.
  • the present inventors recognized that adhesive articles remained difficult to remove in a single step and still experienced visible damage.
  • the inventors of the present disclosure sought to formulate peelable mounting products with at least one of higher shear strength, ability to work well on painted or rough surfaces, that are capable of consistently holding higher weights, and/or that are easier for the user to remove from the substrate, all without damaging the substrate to which they are applied.
  • the inventors of the present disclosure recognized that the existing peel release adhesive products could be improved or enhanced by reducing or eliminating the contribution of the hardgood to peel force generated by the adhesive during removal. In some instances, this can be accomplished by increasing the flexibility of the hardgood in one or more directions offset from the direction of gravitational force provided by an object to be mounted. The increased flexibility tends to reduce the peel force necessary to remove the product by easing the peel force required to separate the hardgood from the substrate; the adhesive articles of the present disclosure can accordingly capitalize on myriad adhesive constructions without deleteriously impacting damage free removability.
  • the enhanced construction of the hardgood allows the adhesive articles to hold more weight.
  • the enhanced performance permits the adhesive articles to be used on new surfaces (e.g., bathroom tile).
  • the enhanced removability increases or enhances the product performance on certain surfaces (e.g., rough or textured surfaces such as, for example, wallpaper, drywall, etc.).
  • the present disclosure provides an adhesive article comprising a flexible body and an adhesive disposed adjacent a rear major surface of the body.
  • the flexible body includes a plurality of body segments.
  • the body segments are spaced apart at a certain frequency and connected only at discrete locations.
  • the connections can be located adjacent edge and central regions of the body and serve to connect adjacent segments.
  • the body segments are rails arranged substantially in parallel.
  • the flexible body may further include a projection for mounting an object.
  • the projection may include projection segments, spaced apart at a certain frequency. In presently preferred implementations, these projection segments are not directly connected to one another.
  • the adhesive may be disposed directly on a major surface of the body segments.
  • the flexible body may include a backplate having at least one of length and width dimensions greater than the corresponding dimensions of the body segments.
  • the backplate serves to connector adjacent body segments, and has a thickness that is considerably less than the maximum thickness of the body segments.
  • layer means a single stratum that may be continuous or discontinuous over a surface.
  • the terms, “height”, “depth”, “top” and “bottom” are for illustrative purposes only, and do not necessarily define the orientation or the relationship between the surface and the intrusive feature. Accordingly, the terms “height” and “depth”, as well as “top” and “bottom” should be considered interchangeable.
  • the term “generally”, unless otherwise specifically defined, means that the property or attribute would be readily recognizable by a person of ordinary skill but without requiring absolute precision or a perfect match (e.g., within +/- 20 % for quantifiable properties).
  • the term “substantially”, unless otherwise specifically defined, means to a high degree of approximation (e.g. , within +/- 10% for quantifiable properties) but again without requiring absolute precision or a perfect match. Terms such as same, equal, uniform, constant, strictly, and the like, are understood to be within the usual tolerances or measuring error applicable to the particular circumstance rather than requiring absolute precision or a perfect match.
  • Fig. 1 is a perspective view of one embodiment of an exemplary adhesive article of the type generally described herein;
  • Fig. 2 is atop plan view of the adhesive article of Fig. 1;
  • Fig. 3 is a side view of the adhesive article of Figs. 1-2;
  • Fig. 4 is a perspective view of another embodiment of an exemplary adhesive article of the type generally described herein;
  • Fig. 5 is atop plan view of the adhesive article of Fig. 4.
  • Fig. 6 is a side view of the adhesive article of Figs. 4-5.
  • the present disclosure generally relates to adhesive articles that can be removed from a substrate, wall, or surface (generally, an adherend) without damage to the adherend or at least some components of the article (e.g., the flexible body as described below).
  • the terms “without damage” and “damage- free” or the like means the adhesive article can be separated from the substrate without causing visible damage to paints, coatings, resins, coverings, or the underlying substrate and/or leaving behind residue.
  • Visible damage to the substrates can be in the form of, for example, scratching, tearing, delaminating, breaking, crumbling, straining, and the like to any layers of the substrate. Visible damage can also be discoloration, weakening, changes in gloss, changes in haze, or other changes in appearance of the substrate.
  • the adhesive article includes (1) one or more peelable adhesive layers adjacent to (2) a flexible mounting body.
  • peelable means that the adhesive article can be removed from a substrate or surface by peeling at angle of between about 1° and about 180°. In some embodiments, the adhesive article can be removed from a substrate or surface by peeling at angle of between 30° to 120°. In some embodiments, the adhesive article can be removed from a substrate or surface by peeling at angle of at least about 35°.
  • Figs. 1-3 depict an exemplary embodiment of an adhesive article 100 as generally described herein.
  • the adhesive article 100 includes a flexible mounting body 110 having first and second opposed major surfaces 111 and 112.
  • Fig. 1 depicts the adhesive article 100 in perspective view, with an adhesive layer 140 (shown in Fig. 3) disposed beneath the body 110.
  • the adhesive layer 140 can be generally optically clear such that is not particularly visible on the surface of the body 110.
  • the adhesive layer 140 can be generally opaque.
  • the flexible body 110 has a generally rectangular shape defined by an upper edge, a lower edge, and side edges.
  • the shape of the flexible body 110 is not particularly limited and can include any suitable shape or combination of shapes.
  • the flexible mounting body 110 includes body segments 120 and connecting bands 130.
  • the flexible body 110 in Figs. 1-3 is comprised of a plurality of rails (i.e., linear body segments) 120 and three connector bands 130a-130c.
  • the plurality of linear body segments 120 are each spaced from one another by a certain pitch (e.g., edge to edge distance) “D” and are directly connected to any adjacent linear segments only at the bands 130a-130c.
  • the first connector band 130a directly couples adjacent linear segments 120 at their respective distal ends 123, while the second connector band 130b couples the adjacent linear segments at their respective proximal ends 124.
  • a third connector band 130c extends through the approximate center of the flexible body 110. Accordingly, the linear segments 120 are free to flex in at least the horizontal direction during attempted peel removal of the adhesive article 100.
  • the linear segments 120 are arranged in a repeating manner about a central, horizontal axis 118 of the body 110.
  • the linear segments 120 extend perpendicular to the central axis 118 and are continuous in the y-direction.
  • the linear segments 120 may be arranged as a triangular wave, a sawtooth wave, or in a radial pattern, to identify a few non-limiting examples.
  • a Cartesian x-y-z coordinate system is included with Figs. 1 - 3 for reference purposes.
  • the first and second major surfaces 111, 112 extend generally parallel to the x-y plane, and the thickness “T” of the body 110 corresponds to the z-axis.
  • the body 110 includes a transverse direction, generally along the x-axis and a longitudinal direction, generally along the y-axis.
  • the arrangement of linear segments 120 include a defined pitch “D” between nearest-neighboring, adjacent linear segments in the transverse direction.
  • the repeating, parallel arrangement of rails 120 in flexible body 110 results in the pitch “D” being substantially the same along the length of each relevant linear segment. Flexibility can be affected by increasing or decreasing the pitch “D” (i.e., frequency) between adjacent segments or along the length of adjacent segments.
  • Linear segments 120 may be separated by a pitch D in an exemplary range of between about 0.02 inches and 0.3 inches.
  • Flexibility may also be affected by changing the arrangement of the linear segments or by increasing or decreasing the number of linear segments 120, meaning that the absolute number of linear segments is not critical; more than three or more than five can provide sufficient performance, depending on the intended end use.
  • Each body segment 120 includes a cross-sectional thickness “T” in the z-direction.
  • the cross-sectional thickness is continuous throughout the majority of the length of the flexible body 110, with the thickness tapering as the proximal and distal connector bands 130a, 130b are approached.
  • the cross-sectional thickness T may be thicker at the connector band than the remaining body of the linear segments 120.
  • the cross-sectional thickness may include a tapering thickness as the center of the body 110 is approached.
  • the body segments 120 have a maximum thickness, that is at the thickest point in the z-direction, of between about 2 mils and about 200 mils.
  • the connector bands 130a- 13 Ob as depicted are substantially continuous across the width of the flexible body 110, while connector band 130c includes individual band segments 131 between adjacent rails 120.
  • the rails 220 and connector bands 130a-130c thus cooperate to define the second major surface 112 of the body 110. Flexibility and available adhesive area (as defined below) may also be affected by changing the amount of additional surface area contributed by connector bands 130 to second major surface 112, either by increasing or decreasing the number of bands or by making one, some, or all of the bands a different size.
  • connector bands 130a- 130c need extend the full transverse width of the flexible body 110.
  • the central band 130c may only extend the width of the mounting projection 150 (described below).
  • only the central band 130c may extend the full transverse width, with either or both of the distal and proximal bands 130a, 130b extending only a portion of the width.
  • Each connector band 130 includes a cross-sectional thickness “S” in the z-direction.
  • the cross-sectional thickness is continuous throughout the width 132 and length of each connector band 130 or band segment 131.
  • the cross-sectional thickness S may be thicker at the connectors than the linear segments 120 or vice versa.
  • the connector bands 130 are considerably thinner than the linear segments 120.
  • the linear segments are at least twice as thick as the bands, in some implementations at least three times as thick, and in some implementations at least four times as thick.
  • the connector bands have a maximum cross-sectional thickness “S” of about 0.035 inches, while the linear segments have a maximum thickness T of about of about 0.080 inches. In another exemplary embodiment, the connector bands have a maximum cross-sectional thickness “S” of about 0.022 inches, while the linear segments have a maximum thickness T of about of about 0.080 inches. In another exemplary embodiment, the connector bands have a maximum cross-sectional thickness “S” of about 0.025 inches, while the linear segments have a maximum thickness T of about of about 0.130 inches.
  • the connector bands 130 are aligned substantially parallel to a desired peel front.
  • the desired peel front is the transverse (i.e., horizontal) direction across the center of flexible body 110.
  • the relatively thin cross-sectional dimension of the connector bands tends to reduce their contribution to the stiffness of the flexible body in the transverse direction, allowing the body to maintain its desired flexibility for peel removal.
  • the flexible body 110 may be removed (i.e., peeled) at other angles that are oblique to the transverse axis, though the linear segments 120 resist peel in directions substantially parallel to the longitudinal direction. This designed resistance allows the flexible body to hold mounting weight and demonstrate requisite shear strength while still permitting manipulation of the segments to ease removal.
  • the arrangement of linear segments 120 and thin connector bands 130 tends to increase vertical stiffness of the body to improve holding strength, while reducing horizontal stiffness to assist peel removal and provide enhanced adhesive surface area for attachment to an adherend.
  • the linear segments 120 are generally square in cross-section, however linear segments of the flexible body may have a variety of cross-sectional shapes.
  • the cross-sectional shape of one or more linear segments 120 may be a polygon (e.g. , square, tetrahedron, rhombus, trapezoid), which may be a regular polygon or not, or the cross-sectional shape of a linear segment can be curved (e.g., round or elliptical).
  • Each linear segment 120 possesses a length 125 and a width 126, with the length typically being substantially greater than the width. The comparatively greater length aids in the shear holding power of the flexible body when weight is applied in the y-direction.
  • a ratio of the length to the width is at least 15 : 1.
  • An exemplary range of lengths 125 for each linear segment is between about 0.8 inches to 6 inches, while an exemplary range of widths 126 is between about 0.05 inches and about 0.3 inches.
  • the first major surfaces 128 of the linear segments 120 define the front major surface 111 of the flexible body 110; second major surface of the 129 of the linear segments and the second major surface 134 of the connector bands define the rear major surface 112.
  • the major surface 128 defines a first body plane and the second major surfaces 129, 134 cooperate to define a second body plane.
  • the body planes as depicted are in parallel but may intersect and form an oblique angle in other embodiments.
  • the second major surfaces 129, 134 or the segments 120 and bands 130 are coplanar, as this tends to desirably increase the available adhesive area.
  • the surfaces 129, 134 may be in parallel planes.
  • a mounting projection 150 extends outwardly from the front major surface 111 of the flexible body 110.
  • the projection 150 includes a plurality of mounting segments 151 coupled to a corresponding linear segment 120.
  • the mounting segmentsI51 unlike linear segments 122, are not directly coupled to one another. The lack of connection allows the article 100 to flex at the mounting projection 150 as well as the rest of the body 110.
  • a recess 157 formed between an upper portion of the linear segments 120 and the mounting segments 151, can accept a thread or other structure attached to an object to be mounted.
  • the mounting segment 151 and corresponding linear segment 122 form an integral structure, wall 155, from the proximal end 154 of projection 150 to the bottom 159 of the recess 157. An edge of the wall 155 for each linear segment-mounting segment combination thus provides the bottom surface 159 for the recess 157.
  • each mounting segment 151 extends in a plane substantially parallel to its corresponding linear segment 122.
  • all elements of the flexible body are unitary or monolithic, in that they are made of a single piece of material. In other embodiments, the constituent elements may be made separately and joined together to form the flexible body.
  • a peelable adhesive layer 140 can be disposed on the rear major surface 112 of the flexible body 110, as most clearly depicted in Fig 3.
  • the adhesive layer 140 can be a single layer or can be multilayer.
  • the adhesive layer 140 can each be continuous or discontinuous (e.g., patterned) across the major surface of the body 110.
  • An available bond area for the article 100 includes the total area defined by the outer surface 145 of the adhesive layer. In embodiments lacking a backplate as detailed below, the available bond area does not include the gap between linear segments 120 in regions outside the connector bands 130.
  • the available bond area of the major surface 145 is used to couple the adhesive mounting article 100 to, for example, a wall surface.
  • the adhesive layer 140 may be disposed only across the second major surfaces 135 of one or more of the connector bands 130a-130c and may not be otherwise present on the remaining surfaces 129 of the rails 120.
  • the adhesive layer 140 would itself include one or more discrete bands of adhesive corresponding in location to the connector band(s) 130.
  • all three connector bands would include a co-extensive adhesive band to collectively define adhesive layer 140.
  • an article 100 may lack an adhesive layer on the second major surface 112.
  • the second major surface may include one component (e.g., a hook or loop structure) of a separable connector.
  • Suitable separable connectors may be found in US Patent Nos. 6,692,807 (Bries et al.) and 9,920,786 (Runge et al.).
  • the adhesive layer 140 is no more than coextensive with the major surfaces 111, 112 of the flexible body. In other embodiments not pictured, the adhesive layer can extend beyond the perimeter of the body 110.
  • the thickness of the adhesive layer(s) is not particularly limited but is typically substantially continuous across the second major surface 112. In presently preferred implementations, the thickness of the adhesive layer is no greater than 95% of the body thickness “T”, no greater than 90%, no greater than 80%, no greater than 75%, no greater than 60%, no greater than 50%, no greater than 40%, no greater than 30%, no greater than 20%, and in some embodiments no greater than 10% of the body thickness “T”. In typical embodiments, the adhesive layer 140 has a thickness of between about 1 mil and about 8 mils.
  • the adhesive layer 140 may include a backing or may be backing free. Backing free adhesive constructions are described, for example, in US Publication No. 2016/0068722 (Schmitz-Stapela et al.).
  • the adhesive construction 110 may include one or more adhesive layers disposed on a core, as described in International Application No. PCT/US2018/047864 (Krull et al.), assigned to the present assignee. Other suitable backing materials can be found in PCT Application Nos. PCT/US2017/016039 (Runge et al.) and PCT/US2018/039553 (Hoffman et al.).
  • the adhesive layer 140 may be single layer or multilayer.
  • the backings and/or core layers may likewise be single layer or multilayer.
  • the flexible body 110 can still provide sufficient strength so that, depending on the specific application, the structural integrity will not fail during use of the adhesive article 100 for mounting an obj ect on a mounting surface .
  • the body 110 can advantageously provide a static shear strength and rigidity in the y-direction sufficient for supporting an object and providing a suitable level of resiliency to the article 100.
  • the adhesive article 200 includes a flexible body 210 including a plurality of linear rails 220 and a backplate 300 extending between the rails 220.
  • the backplate 300 essentially serves as a monolithic connecting band coupling all linear segments 220.
  • the backplate 300 extends beyond the periphery of the flexible body 210 and includes a length exceeding the corresponding dimensions of the flexible body 210.
  • the thickness of the backplate 300 is typically substantially less than the corresponding thickness of the body 210, allowing for greater flexibility despite the typically monolithic nature of the backplate 300.
  • An adhesive layer 240 (shown in Fig. 6) can be affixed to a rear major surface 212 of the body 210.
  • the backplate may be advantageous in obscuring an aesthetically undesirable adhesive layer and may provide additional rigidity to the adhesive article to aid in bearing the weight of a mounted object.
  • the backplate may be integrally made with the flexible body or may be made separately and affixed thereafter; an integral backplate is presently preferred.
  • the thickness of the rails 220 is typically at least 3 to 4 times the thickness of the backplate 300. A greater disparity in thickness is typically needed to offset the potential increase in transverse stiffness accompanying additional material between the rails 220.
  • the flexible body is made from of thermoplastic polymers. In some embodiments, the flexible body is made from thermoset polymers. In some embodiments, the flexible body is made using polyolefin materials. In some embodiments, the flexible body is made using polycarbonate materials. In some embodiments, the flexible body is made using high-impact polystyrene (HIP). In some embodiments, the flexible body is made using acrylonitrile-butadiene-styrene (ABS) terpolymers. In some embodiments, the flexible body is made of polyetheretherketone (PEEK). In some embodiments, the flexible body is made from nylon. In some embodiments, the flexible body is made using two or more polymeric materials.
  • HIP high-impact polystyrene
  • ABS acrylonitrile-butadiene-styrene
  • PEEK polyetheretherketone
  • the flexible body is made from nylon. In some embodiments, the flexible body is made using two or more polymeric materials.
  • the flexible body is made from metal. In some embodiments, the flexible body is made from stainless steel. In some embodiments, the metal is painted, glazed, stained, brushed, or coated to alter its appearance. In some embodiments the flexible body is made from ceramic. In some embodiments, the flexible body is made from glazed ceramic. In some embodiments, the flexible body is made from unglazed ceramic. In some embodiments, the flexible body is comprised of naturally-based materials such as wood, bamboo, particle board, cloth, canvas, or derived from biological sources, and the like. In some embodiments, the naturally-based materials may be painted, glazed, stained, or coated to change their appearance. In some embodiments, the flexible body is made using two or more materials from the list above. In some embodiments, the flexible body is made from two pieces that are reversibly or irreversibly attached, joined, or welded together.
  • the flexible body can be made of a rigid material such as, for example, thermoplastic materials including polycarbonate, polyesters, and ABS. In some embodiments, depending on the exact application, rigid polyvinyl chloride, HIP, PEEK, or nylon may be used. It is to be understood that the flexible body can be made of any suitable material providing appropriate loading strength in the y-direction.
  • the flexible body can be made using any method known in the art.
  • the flexible body is made as an integrate unit by injection molding, additive manufacturing (e.g., 3D printing, selective laser sintering, selective laser melting, rapid prototyping, etc.) resin transfer molding, compression molding, and the like.
  • the flexible body comprises two pieces wherein the first piece acts as a mounting surface for attaching the adhesive article to a substrate, and the second piece acts as a hanging member which may be used for hanging or mounting objects to the substrate.
  • the two pieces may be reversibly attached using mechanical fasteners, hook and loop materials, or an additional adhesive layer.
  • the peelable adhesive layer(s) may be attached to the flexible body using a lamination process. In some embodiments, the peelable adhesive layer(s) and body may be attached to the flexible body using multiple lamination processes.
  • the mounting projection may be attached to the flexible body using two or more injection molding steps in using one or more molds.
  • the peelable adhesive layer(s) may be attached manually by the end user.
  • the adhesives used in the adhesive articles described herein can include any adhesive having the desired properties.
  • the adhesive is peelable.
  • the adhesive releases cleanly from the surface of an adherend when the adhesive article is peeled at an angle of about 35° or less from a surface of the adherend.
  • the peelable adhesive releases from a surface of an adherend when an article is peeled at an angle of about 35° or greater from the adherend surface such that there are substantially no traces of the adhesive left behind on the surface of the adherend.
  • the adhesive can be, for example, any of the adhesives described in any of the following patent applications, all of which are incorporated by reference herein: International Publication Nos. WO/2015/035556, WO/2015/035960, WO/2017/136219, WO/2017/136188 and U.S. Patent Application No. 2015/034104, all of which are incorporated herein in their entirety.
  • the peelable adhesive is a pressure sensitive adhesive.
  • Any suitable composition, material or ingredient can be used in the pressure sensitive adhesive.
  • a general description of useful pressure sensitive adhesives may be found in the Encyclopedia of Polymer Science and Engineering, Vol. 13, Wiley-Interscience Publishers (New York, 1988). Additional description of useful pressure-sensitive adhesives may be found in the Encyclopedia of Polymer Science and Technology, Vol. 1, Interscience Publishers (New York, 1964).
  • Pressure sensitive adhesive compositions are well known to those of ordinary skill in the art to possess properties including the following: (1) tack, (2) adherence with no more than finger pressure, (3) sufficient ability to hold onto an adherend, and (4) sufficient cohesive strength to be cleanly removable from the adherend.
  • PSAs Materials that have been found to function well as pressure sensitive adhesives are polymers designed and formulated to exhibit the requisite viscoelastic properties resulting in a desired balance of tack, peel adhesion, and shear holding power.
  • Suitable PSAs may be based on crosslinked or non-crosslinked (meth)acrylics, rubbers, thermoplastic elastomers, silicones, polyurethanes, and the like, and may include tackifiers in order to provide the desired tac, as well as other additives.
  • the PSA is based on a (meth)acrylic PSA or at least one poly(meth)acrylate, where (meth)acrylate refers to both acrylate and methacrylate groups.
  • the PSA is an olefin block copolymer based adhesive.
  • Acrylic based pressure sensitive adhesives are described in U.S. Pat. No. 4,726,982 (Traynor et al.) and in U.S. Pat. No. 5,965,256 (Barrera), for example.
  • Silicone based pressure sensitive adhesives are described in U.S. Pat. No. 6,730,397 (Melancon et al.) and U.S. Pat. No. 5,082,706 (Tangney), and US Provisional Application No. 62/721,958, filed August 23, 2018 and assigned to the present assignee, for example.
  • Polyurethane based pressure sensitive adhesives are described in U.S. Pat. Appl. Pub. No.
  • Olefin block copolymer based pressure sensitive adhesives are described in U.S. Pat. Appl. Pub. No. 2014/0335299 (Wang et al.), for example.
  • Exemplary pressure sensitive adhesives utilize one or more thermoplastic elastomers, e.g., in combination with one or more tackifying resins. In some embodiments, the adhesive is not a pressure sensitive adhesive.
  • the peelable adhesive layer can include at least one of rubber, silicone, or acrylic based adhesives.
  • the peelable adhesive layer can include a pressure-sensitive adhesive (PSA).
  • PSA pressure-sensitive adhesive
  • the peelable adhesive can include tackified rubber adhesives, such as natural rubber; olefins; silicones, such as silicone polyureas or silicone block copolymers; synthetic rubber adhesives such as polyisoprene, polybutadiene, and styrene-isoprene-styrene, styrene-ethylene- butylene- styrene and styrene-butadiene-styrene block copolymers, and other synthetic elastomers; and tackified or untackified acrylic adhesives such as copolymers of isooctylacrylate and acrylic acid, which can be polymerized by radiation, solution, suspension, or emulsion techniques; polyurethanes; silicone block copolymers;
  • any known additives useful in the formulation of adhesives may also be included.
  • Additives include plasticizers, anti- aging agents, ultraviolet stabilizers, colorants, thermal stabilizers, anti-infective agents, fillers, crosslinkers, as well as mixtures and combinations thereof.
  • the adhesive can be reinforced with fibers or a fiber scrim which may include inorganic and/or organic fibers. Suitable fiber scrims may include woven-, non-woven or knit webs or scrims.
  • the fibers in the scrim may include wire, ceramic fiber, glass fiber (for example, fiberglass), and organic fibers (for example, natural and/or synthetic organic fibers).
  • the adhesive includes a tackifier. Some exemplary tackifiers include at least one of polyterpene, terpene phenol, rosin esters, and/or rosin acids.
  • the peelable adhesive is a flowable adhesive that can be coated onto the backing. In some embodiments, the peelable adhesive is a more solid adhesive as is generally described in, for example, German Patent No. 33 31 016.
  • the peelable adhesive has a Tg of between about -125 degrees Celsius and about 20 degrees Celsius, as determined by dynamic mechanical analysis of the tan 5 peak value. In some embodiments, the peelable adhesive has a Tg of between about -70 degrees Celsius and about 0 degrees Celsius. In some embodiments, the peelable adhesive has a Tg of between about -60 degrees Celsius and about -20 degrees Celsius. In some embodiments, the peelable adhesive has aTg of greater than -80 degrees Celsius, greater than -70 degrees Celsius, greater than -60 degrees Celsius, greater than -50 degrees Celsius, greater than -40 degrees Celsius, or great than -30 degrees Celsius. In some embodiments, the peelable adhesive has a Tg of less than 20 degrees Celsius, 10 degrees Celsius, 0 degrees Celsius, -10 degrees Celsius, -20 degrees Celsius, or -30 degrees Celsius.
  • Some peelable adhesives that can be used in the adhesive articles of the present disclosure have a storage modulus of about 300,000 Pa or greater, about 400,000 Pa or greater, about 500,000 Pa or greater, about 1,000,000 Pa or greater at 25°C, as determined by dynamic mechanical analysis.
  • the adhesive has a storage modulus of 750,000 Pa or less, 500,000 Pa or less, 400,000 Pa or less, 300,000 Pa or less, or 250,000 Pa or less at 25°C, as determined by dynamic mechanical analysis.
  • the thickness of the peelable adhesive on at least one of the first or second major surfaces of the core is about 1 pm to about 1 mm.
  • adhesion properties of the adhesive can range from 0.1 N/dm to 25 N/chn. In some embodiments, adhesion properties of the adhesive can range from 0.5 N/dm to 10 N/dm. In some embodiments, adhesion properties of the adhesive can range from 1 N/dm to 5 N/dm.
  • the peelable adhesive can provide a shear strength of, for example, 1-20 pounds per square inch as measured by ASTM Test Method D3654M-06.
  • the peelable adhesives are tailored to achieve peel with no or minimal damage. Exemplary methods and articles for doing so are described in, for example, U.S. Patent No. 6,835,452, International Publication Nos. WO/2018/039584 and WO/2017/136188, each incorporated herein in their entirety.
  • the adhesive article further includes one or more release liners.
  • the release liner can be, for example, on either or both of the major surfaces of the adhesive layers.
  • the release liner protects the adhesive during manufacturing, transit, and before use. When the user desires to use the adhesive article, the user can peel or remove the release liner to expose the adhesive.
  • suitable liners include paper, e.g., kraft paper, or polymeric films, e.g., polyethylene, polypropylene or polyester. At least one surface of the liner can be treated with a release agent such as silicone, a fluorochemical, or other low surface energy based release material to provide a release liner.
  • Suitable release liners and methods for treating liners are described in, e.g., U.S. Pat.
  • release liners are fluoroalkyl silicone polycoated paper.
  • the release liners can be printed with lines, brand indicia, or other information.
  • the adhesive articles of the present disclosure can be removed from a substrate or surface without damage.
  • the adhesive articles can be removed from at least one of painted drywall and wallpaper without damage.
  • Some adhesive articles of the present disclosure have excellent shear strength. Some embodiments of the present disclosure have a shear strength of greater than 1600 minutes as measured according to ASTM D3654-82. Some embodiments of the present disclosure have shear strength of greater than 10,000 minutes as measured according to ASTM D3654-82. Some other embodiments of the present disclosure have shear strength of greater than 100,000 minutes as measured according to ASTM D3654-82.
  • Some adhesive articles of the present disclosure demonstrate a lower peel adhesion to make the adhesive article easier to remove. Others demonstrate a higher peel adhesion, yet still provide for damage free removal. Some adhesive articles of the present disclosure can have a higher peel adhesion as to permit handling of the adhesive article by the user without accidental separation. Some embodiments of the present disclosure have a peel adhesion between about 5 oz/in to 50 oz/in. Some embodiments of the present disclosure have a peel adhesion between about 10 oz/in to 40 oz/in. Some embodiments of the present disclosure have a peel adhesion between about 15 oz/in to 30 oz/in.
  • Some adhesive articles of the present disclosure demonstrate improved weight bearing capacity, holding a lOlbs weight for at least 72 hours. In presently preferred embodiments, the adhesive articles of the present disclosure demonstrate improved weight bearing capacity, holding a 10 lbs weight for at least one week. In presently preferred embodiments, the adhesive articles of the present disclosure demonstrate improved weight bearing capacity, holding a 10 lbs weight for at least two weeks.
  • Some adhesive articles of the present disclosure have a tensile strength at break sufficiently high so that the adhesive article will not rupture prior to being removed from an adherend at an angle of 35° or greater.
  • the adhesive articles of the present disclosure exhibit enhanced conformability to a substrate or surface than prior art adhesive mounting articles. In some embodiments, the adhesive articles of the present disclosure hold more weight when adhered or attached to a substrate or surface than prior art adhesive mounting articles. In some embodiments, the adhesive articles of the present disclosure hold more weight for a longer period of time when adhered or attached to a substrate or surface than prior art adhesive mounting articles. In some embodiments, the adhesive articles of the present disclosure remain adhered to a textured, rough, or irregular surface for a longer period of time than prior art adhesive mounting articles. In some embodiments, the adhesive articles of the present disclosure hold a higher amount of weight when adhered to a textured, rough, or irregular surface than prior art adhesive mounting articles.
  • Adhesive articles of the present disclosure can advantageously provide enhanced weight bearing capability with a reduction or elimination of substrate damage on removal. Accordingly, presently preferred embodiments of the present disclosure demonstrate effective weight bearing capacity, a stronger adhesion per square inch of available adhesive area, and peel-removability from a painted drywall substrate without damage. Moreover, at least one of the flexible body and adhesive layer can typically be reused after removal of the article from an adherend. Typically, the flexible body can be repurposed for use with a new adhesive layer. In other embodiments, the entire adhesive article is repositionable or reusable.
  • the adhesive articles described herein can be made in various ways.
  • One embodiment involves disposing an adhesive onto or adjacent to a major surface of a flexible body.
  • the adhesive can be disposed on the flexible body in any known way, including, for example, the pressure sensitive adhesive composition can be coated onto a release liner, coated directly onto a body, or formed as a separate layer (e.g., coated onto a release liner) and then laminated to a body.
  • An adhesive can be deposited onto the flexible body with a known deposition method, including, e.g., solvent coating methods, waterborne coating methods, or hot melt coating methods, e.g., knife coating, roll coating, reverse roll coating, gravure coating, wire wound rod coating, slot orifice coating, slot die coating, extrusion coating, or the like.
  • the adhesive article is applied, attached to, or pressed into an adherend. In this way, the adhesive article contacts the adherend. Where a release liner is present, the release liner is removed before the adhesive article is applied, attached to, or pressed into an adherend. In some embodiments, at least a portion of the adherend is wiped with alcohol before the adhesive article is applied, attached to, or pressed into an adherend.
  • the flexible body and adhesive are removed together. In other embodiments, the flexible is removed first in order to access the adhesive layer.
  • the adhesive articles can be used in isolation, as one of many articles attached to a surface, or as part of a stack of adhesive articles. In the latter implementation, the resulting construction would include a plurality of adhesive articles disposed in vertical relation to one another.
  • the adhesive articles may be used in wet or high humidity environments such as those found in bathrooms. For example, they can be adhered to toilets (e.g., toilet tanks), bathtubs, sinks, and walls.
  • the adhesive article may be used in showers, locker rooms, steam rooms, pools, hot tubs, and kitchens (e.g., kitchen sinks, dishwashers and back splash areas, refrigerators and coolers).
  • the adhesive article may also be used in low temperatures applications including outdoor applications and refrigerators. Useful outdoor applications include bonding articles such as signage to outdoor surfaces such as windows, doors and vehicles.
  • the adhesive articles may be used to mount various items and objects to surfaces such as painted drywall, plaster, concrete, glass, ceramic, fiberglass, metal or plastic.
  • Items that can be mounted include, but are not limited to, wall hangings, organizers, holders, baskets, containers, decorations (e.g., holiday decorations), calendars, posters, dispensers, wire clips, body side molding on vehicles, carrying handles, signage applications such as road signs, vehicle markings, transportation markings, and reflective sheeting.
  • Adhesive articles can also be initially repositionable and may even be reusable in some iterations until one of the adhesive layers loses tack.
  • repositionable means an adhesive article that can be applied to a substrate and then removed and reapplied without distorting, defacing, or destroying the adhesive article, or substrate.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)

Abstract

La présente invention concerne des articles à montage adhésifs qui peuvent être retirés de surfaces sans dommage en ayant une contribution réduite d'un produit dur à la force de pelage générée par l'article adhésif lors du retrait. Dans certains cas, ceci peut être accompli par un produit dur qui est flexible dans une direction de pelage et rigide dans une direction de suspension de poids. De tels produits durs peuvent comprendre une pluralité de segments de corps reliés de façon minimale disposés autour de l'axe transversal du produit dur.
PCT/US2022/018091 2022-02-28 2022-02-28 Articles à montage adhésifs flexibles comprenant des segments de corps reliés reliés par intermittence WO2023163717A1 (fr)

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PCT/US2022/018091 WO2023163717A1 (fr) 2022-02-28 2022-02-28 Articles à montage adhésifs flexibles comprenant des segments de corps reliés reliés par intermittence

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001012688A (ja) * 1999-07-01 2001-01-16 Inoac Corp 筒状断熱材の接合固定部材
JP2001037522A (ja) * 1999-07-30 2001-02-13 Shiro Horiuchi 簡易接合粘着手提げ具
WO2004041952A1 (fr) * 2002-11-01 2004-05-21 3M Innovative Properties Company Article adhesif a decollement par etirement presentant un element a memoire de forme
JP2014074489A (ja) * 2012-10-04 2014-04-24 Shinichi Fujita 螺旋脱着フック
WO2020128911A1 (fr) * 2018-12-19 2020-06-25 3M Innovative Properties Company Produits durs flexibles ayant une aptitude à l'enlèvement par pelage améliorée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001012688A (ja) * 1999-07-01 2001-01-16 Inoac Corp 筒状断熱材の接合固定部材
JP2001037522A (ja) * 1999-07-30 2001-02-13 Shiro Horiuchi 簡易接合粘着手提げ具
WO2004041952A1 (fr) * 2002-11-01 2004-05-21 3M Innovative Properties Company Article adhesif a decollement par etirement presentant un element a memoire de forme
JP2014074489A (ja) * 2012-10-04 2014-04-24 Shinichi Fujita 螺旋脱着フック
WO2020128911A1 (fr) * 2018-12-19 2020-06-25 3M Innovative Properties Company Produits durs flexibles ayant une aptitude à l'enlèvement par pelage améliorée

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