WO2005093162A1 - Article souple a poche - Google Patents

Article souple a poche Download PDF

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Publication number
WO2005093162A1
WO2005093162A1 PCT/US2005/006235 US2005006235W WO2005093162A1 WO 2005093162 A1 WO2005093162 A1 WO 2005093162A1 US 2005006235 W US2005006235 W US 2005006235W WO 2005093162 A1 WO2005093162 A1 WO 2005093162A1
Authority
WO
WIPO (PCT)
Prior art keywords
sign
pocket
flexible
viewing surface
bonds
Prior art date
Application number
PCT/US2005/006235
Other languages
English (en)
Inventor
Steven M. Nielsen
David G. Schueler
John W. Frank
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
Publication of WO2005093162A1 publication Critical patent/WO2005093162A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/688—Free-standing bodies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777—Edge feature

Definitions

  • the invention relates to a flexible article such as a roll-up sign comprising a pocket, such pocket suitable for receipt of a support.
  • the reinforcing frame members may be removably secured to the flexible sign by means of "corner" pockets that are either “soft" pockets sewed on the sign itself or molded plastic members defining a socket and secured to the sign for removably securing the ends of the frame members.
  • molded plastic socket is disclosed in U.S. Pat. No. 4,426,800 granted on Jan. 24, 1984.
  • Alternative mounting members for use with flexible signs are described in U.S. Patent Nos. 4,426,800; 4,490,934 and 5,446,984.
  • One example of a prior art flexible sign is commercially available from Korman Signs Inc., Richmond, VA.
  • FIG. 1 A plan view of the non- viewing surface of a corner portion of such prior art roll-up sign 100 is illustrated in FIG. 1.
  • the corner portion consists of a first layer 111 and a second layer 112, each layer consisting of a piece of a square-shape fluorescent orange mesh that has been folded onto itself along folds 113 and 114.
  • the first layer 111 has been sewn to the second layer 112 along seams 141 and 142 resulting in a pocket 130 having a single opening 120 and an enclosure defined by stitched seams 142.
  • the pocket assembly has been stitched to fluorescent orange retroreflective sheeting at seams 140 and 114.
  • the non- viewing surface 181 of the sheeting consists of a backing layer; whereas the viewing surface 180 consists of topfilm bonded to an underlying cube corner retroreflective layer.
  • a black colored sign legend is present on the exposed surface of the topfilm.
  • the present invention discloses a flexible article having at least one pocket.
  • the article is sufficiently flexible such that the article can be wrapped around a mandrel having a diameter of about 1/2" (1.3 cm) at 25°C without visible cracking.
  • the pocket is comprised of at least one flexible substrate.
  • the pocket is defined by a pair of unstitched bonds that form an enclosure having at least one opening there between.
  • the peripheral bonds may be melt-bonded or adhesive bonded.
  • the pocket receives a support.
  • the article is a (e.g. traffic) sign.
  • the article comprises a viewing surface wherein at least a portion thereof is retroreflective.
  • Such articles typically comprise indicia and/or graphics on a planar viewing surface.
  • the pockets are typically present on opposing ends of the article such as at opposing corner portions.
  • the pockets are preferably present on the non-viewing surface.
  • the method comprises providing a flexible sheet; folding a portion of the flexible sheet onto itself; and bonding the folded flexible sheet such that at least one pocket is formed.
  • the method comprises providing a planar article and bonding at least one separate piece of a flexible substrate such that at least one pocket is formed.
  • the viewing surface preferably comprises retroreflective sheeting.
  • the non-viewing surface may comprise a backing.
  • the backing extends beyond the retroreflective layer in at least one dimension such that the pockets are formed from the extended portions of the backing.
  • the pockets may comprise other flexible substrates such as fabric, optionally comprising a polymeric coating; and/or a polymeric film.
  • FIG. 1 illustrates a plan view of one example of a prior art flexible sign 100.
  • FIG. 2 illustrates a plan view of the non- viewing surface of a portion of one embodiment of the invention.
  • FIG. 3 illustrates a plan view of the non- viewing surface of a portion of another embodiment of the invention.
  • FIG. 4 illustrates an example of a shape of a substrate for making a sign having corner pockets.
  • FIG. 5 depicts the non-viewing surface of a sign prepared from the exemplary shape of FIG. 4.
  • FIG. 6 depicts a plan view of the viewing surface of a roll-up sign further comprising a support.
  • pocket refers to an enclosure having at least one opening.
  • the pocket includes a single opening and the entire perimeter of the pocket with the exception of the opening comprises unstitched peripheral bonds.
  • unstitched bonds refers to bonds that are not sewn. Suitable means of preparing unstitched bonds includes melt-bonding as well as adhesive bonding.
  • the pockets 630a, 630b, 630c, and 630d further include a (e.g. removable) support, such as a collapsible crossbar 650 and optional stand 660.
  • the support generally provides sufficient rigidity to the viewing surface 680 of the article (e.g. sign).
  • Three-dimensional supports e.g. cones, barrels, etc.
  • the sign is suitable for advertising, display and/or traffic safety uses including (e.g.
  • Such articles typically include indicia such as words and/or symbols and/or graphics viewable from the viewing surface.
  • the pockets may alternatively be present on the viewing surface provided that the article remains suitable for its intended end-use, the pockets are preferably present on the non- viewing surface of the article.
  • the viewing surface of the article (e.g. sign) during use is substantially planar.
  • the viewing surface of the (e.g. sign) article can be in any shape with polygons (e.g. octagons), quadrilaterals, and circular shapes being most common particularly for traffic signs.
  • FIG. 2 depicts a plan view of the non- viewing surface of a corner portion of one embodiment of the invention.
  • Pocket 230 of the (e.g. sign) article 200 has an opening 220 and an enclosure defined by unstitched bonds 242.
  • the pocket comprises a pair of substantially parallel bonds 242a and 242b with the opening there between.
  • the remainder of the perimeter is bonded at unstitched bonds 240.
  • FIG. 3 depicts a plan view of the non- viewing surface of a corner portion of another embodiment of the invention.
  • Pocket 330 of (e.g. sign) article 300 has an opening
  • the pocket comprises a pair of substantially parallel bonds (e.g. 342a and 342b) with the opening there between. In the case of pocket 301, the remainder of the perimeter is bonded at unstitched bond 342c.
  • the peripheral edges of the corner sign also include unstitched bonds 340.
  • the pocket substrate may comprise the same or a different flexible substrate than the viewing surface (e.g. sign) substrate.
  • the articles of the invention may be prepared from a single substrate wherein the pockets are formed by folding the (e.g. non-viewing surface) of the sign substrate onto itself and forming unstitched bonds such that one or more (e.g. opposing) pockets are formed. For example, as depicted in FIG.
  • triangular shaped flaps 400 may extend from each corner. The flaps can then be folded onto the backing layer and bonded, as depicted in FIG. 5.
  • rectangular shaped flaps i.e. 450 of FIG. 4
  • the pockets are integral with the sign substrate.
  • the pocket enclosure may consist of the backing material on both interior surfaces of the enclosure thus formed.
  • a non-integral separate pocket may be formed with a separate portion of a pocket substrate bonded to a portion of the (e.g. sign) article.
  • the article may include retroreflective sheeting 212 as the sign substrate and a flexible polymeric mesh 211 as the pocket substrate.
  • the illustrated pockets include a pair of substantially parallel bonds with a single opening there between, in an alternative embodiment the pair of bonds may be angled (e.g. V-shaped) wherein the pair of bonds meet at one end. In yet another embodiment, the pocket may have a pair of (e.g. opposing) openings.
  • Such bond designs are surmised to be novel for at least roll-up signs with stitched seams as sell.
  • the pattern and dimensions of the unstitched bonded may vary provided that sufficient bond strength is obtained. It is preferred that the unstitched bond is of sufficient strength such that it cannot be delaminated by hand without tearing the (e.g. pocket or backing film) substrate.
  • the bond strength of the unstitched bond is typically characterized by a 180 degree peel of at least about 1 lbf/linear inch bond length (1.8 Newtons/cm), and more preferably at least about 2 lbf/linear inch bond length (3.5 Newtons).
  • the width of the unstitched bond may vary for example from about 1 mm to about 10 mm.
  • the unstitched bonds may include multiple bonds (e.g. thermal welds of
  • the pocket substrate may comprise multiple layers.
  • the pocket substrate may be folded onto itself such that the fold aligns with opening 320 of FIG. 3 with the excess pocket material preferably tucked within the enclosure.
  • each of the unstitched bonds may include folded pocket substrate.
  • the entire pocket member may include a double-ply of pocket substrate with the fold line along unstitched bond 241 of Fig. 2 for example.
  • the bonding technique for forming the unstitched bonds is chosen based on the substrate(s) utilized.
  • a preferred technique is melt-bonding such as thermal welding, heat lamination, high frequency welding (e.g., radio frequency welding and ultrasonic welding), and the like. Whereas melt-bonding is suitable for a variety of polymeric (e.g.
  • thermoplastic substrates adhesive bonding can be used for bonding non-thermoplastic pocket material such as fabrics based on natural fibers (canvas). Combinations of melt-bonding and adhesive bonding may also be employed.
  • the substrates e.g. sign substrate and pocket substrate
  • an embossing thermal roller applying a suitable pressure to the components over a raised ridge embossing pattern carried on the surface of the embossing roller.
  • the counter-force nip roller is preferably a sufficiently hard rubber smooth surfaced roller, for example an 85 Shore A durometer roller.
  • the embossing roller is patterned to exert pressure into the material being welded only at the point of the raised ridges.
  • Both the embossing roller and the hard durometer roller are heated to suitable temperatures depending upon the composition of polymers used.
  • the embossing pattern may be of several suitable patterns such a chain link pattern.
  • a platen press may be used to form thermal welds.
  • a preferred melt-bonding technique includes radio frequency (RF) energy.
  • the frequency of the radio frequency energy and the field strength are variable by an operator and chosen for suitability dependent upon the polymeric components of the substrate(s) being bonded. The choice depends on such factors as the individual polymeric dielectric loss factors, dielectric constants, melting temperatures, and layer thickness.
  • the radio frequency energy is delivered through antennas mounted within appropriate platens that are pressed onto the appropriate surfaces of the substrate(s) applying an appropriate amount of pressure and an appropriate duration of radio frequency energy.
  • tie layers e.g. adhesive
  • the tie layer is typically a thermoplastic polymer having a lower melting point at least one of the surface being bonded.
  • the tie layer may be a single polymer, a single phase or multiphase blend of polymers, or may include multiple layers of compatible polymers to accomplish the bonding of the retroreflective layer to the tear resistant film.
  • Exemplary polymers suitable for use as the tie layer include polyurethane; alkylene/alkyl acrylate copolymers such as ethylene methyl acrylate copolymer, ethylene N-butyl acrylate copolymer, ethylene ethyl acrylate copolymer; ethylene vinyl acetate copolymer; ethylene acrylic acid copolymer, polymerically plasticized polyvinyl chloride (PVC); and polyurethane primed ethylene acrylic acid copolymer as well as acrylate-based pressure sensitive adhesives. Blends of such materials may also be used if desired. A wide variety of hot melt, water-based, and solvent-based adhesive compositions may be utilized as are known in the art.
  • Suitable adhesives for the bonding of the non- viewing surface of retroreflective sheeting include for example various adhesives commercially available from 3M Company, St. Paul, MN, such as acrylic foam adhesive tape having the trade designation, "3M VHB Acrylic Foam Tape 4979F Black”; solvent- base adhesive having the trade designation "3M Pronto Instant Adhesive CA40H", and a two part adhesive system having the trade designation "3M Scotch-Weld Acrylic
  • the sign substrate(s) and pocket substrate(s) employed in the articles of the invention are "flexible".
  • flexible refers to the ability to wrap the substrate, laminate or article by hand around a mandrel having a diameter of about 1/2" (1.3 cm) at 25°C without visible cracking.
  • the article is sufficiently flexible such that this test can be conducted a lower temperatures including 0°C. More preferably, the article is sufficiently flexible such that it can be wrapped by hand around a mandrel having a diameter of about 1/4" (6 mm) at each of these temperatures (25°C, 0°C and - 29°C) without visible cracking.
  • the finished article is also flexible.
  • Various flexible substrates are known.
  • the flexible substrate may be reflective, retroreflective or non-reflective.
  • the flexible substrate may be a laminate comprising two or more discreet layers.
  • the flexible substrate and in particular the sign substrate may further comprise colorants (e.g. pigments and/or dyes), ultraviolet light absorbers, light stabilizers, free radical scavengers, antioxidants, processing aids such as antiblocking agents, releasing agents, slip agents, lubricants, and other additives.
  • the thickness of the flexible substrate typically ranges from about 1 mil (e.g. 2 mils, 3 mils) to about 100 mils. Preferably, the thickness of the flexible substrate is less 25 mils and more preferably ranges from about 5 mils to 15 mils.
  • the flexible substrate may comprise a fabric.
  • the fabric may be woven (e.g. mesh), knit, or non-woven. Polyester, nylon, polyvinyl chloride as well as natural fibers such as cotton may be employed including blends of such fibers.
  • a preferred fabric that is particularly amenable to melt-bonding is a fabric having a thermoplastic coating such as a polyvinyl chloride coating.
  • the flexible substrate may be a flexible polymeric sheet or film.
  • the sheet or film may be for example an acrylic-containing film, a ⁇ oly( vinyl chloride)- containing film, a poly( vinyl fluoride)-containing film, a urethane-containing film, a melamine-containing film, a polyvinyl butyral-containing film, a polyolefin-containing film, a polyester-containing film or a polycarbonate-containing film.
  • the flexible substrate may be a multilayer film or laminate as well.
  • flexible retroreflective sheeting is employed. In such embodiments the surface of the article that is viewed by an observer (i.e. the viewing surface) is retroreflective.
  • the retroreflective viewing surface of the article may further comprise transparent protective layers such as a topfilm (e.g. tear resistant film such as described in U.S. 6,652,954) or coatings disposed between the retroreflective surface of the sheeting and the observer.
  • transparent protective layers such as a topfilm (e.g. tear resistant film such as described in U.S. 6,652,954) or coatings disposed between the retroreflective surface of the sheeting and the observer.
  • the two most common types of retroreflective sheeting suitable for use are microsphere-based sheeting and cube comer-based sheeting.
  • Microsphere sheeting sometimes referred to as "beaded sheeting," is well known to the art and includes a multitude of microspheres typically at least partially embedded in a binder layer, and associated specular or diffuse reflecting materials (such as metallic vapor or sputter coatings, metal flakes, or pigment particles).
  • specular or diffuse reflecting materials such as metallic vapor or sputter coatings, metal flakes, or pigment particles.
  • Cube comer sheeting typically includes a multitude of cube comer elements to retroreflect incident light.
  • Cube comer retroreflectors typically include a sheet having a generally planar front surface and an array of cube comer elements protruding from the back surface.
  • Cube comer reflecting elements include generally trihedral structures which have three approximately mutually perpendicular lateral faces meeting in a single comer — a cube comer.
  • the retroreflector is arranged with the front surface disposed generally toward the anticipated location of intended observers and the light source. Light incident on the front surface enters the sheet and passes through the body of the sheet to be totally internally reflected by the faces of the elements, so as to exit the front surface-in a direction substantially toward the light source.
  • the light rays are typically reflected at the lateral faces due to total internal reflection, or by reflective coatings, as previously described, on the back side of the lateral faces.
  • Preferred polymers for forming the array of cube comer elements in retroreflective embodiments of the invention include poly(carbonate), poly(methylmethacrylate), poly(ethyleneterephthalate), aliphatic polyurethanes and cross-linked acrylates such as multifunctional acrylates or epoxies and acrylated urethanes blended with mono-and multifunctional monomers. These polymers are preferred for one or more of the following reasons: thermal stability, environmental stability, clarity, excellent release from the tooling or mold, and capability of receiving a reflective coating. Illustrative examples of flexible cube comer-based retroreflective sheeting such sheeting are disclosed in U.S. Pat. Nos.
  • signage article typically has a coefficient of retroreflection ranging from about 5 candelas per lux, for colored retroreflective layers, to about 1500 candelas per lux per square meter at 0.2 degree observation angle and -4 degree entrance angle, as measured according to ASTM E-810 test method for coefficient of retroreflection of retroreflective sheeting.
  • the coefficient of retroreflection is preferably at least 10, more preferably at least 15, and even more preferably at least 20 candelas per lux per square meter.
  • traffic devices have a coefficient of retroreflection of at least 100 candelas per lux per square meter and preferably at least 200 candelas per lux per square meter for fluorescent orange and at least about 550 candelas per lux for white.
  • the retroreflective article has a retroreflectivity under wet or rainy conditions of not less than 70% of its retroreflectivity under dry conditions. Further description of retroreflection and retroreflective sheeting is found in "Standard Specification for Retroreflective Sheeting for Traffic Control" ASTM D 4956-94 (November 1994).
  • a preferred retroreflective sheeting suitable for roll-up traffic signs include a retroreflective microstructured member; a sealing layer melt-bonded to the microstructured (e.g. cube comer retroreflective layer) member; and a backing member; such as described in U.S. Patent No. 6,004,422.
  • the backing member preferably includes a fibrous web comprising a plurality of multifi lament strands and is melt-bonded to the sealing layer.
  • polymers suitable for use in a sealing layer include polyurethanes, alkylene/alkyl acrylate copolymers such as ethylene/methyl acrylate copolymer, ethylene/N-butyl acrylate copolymer, ethylene/ethyl acrylate copolymer, ethylene/vinyl acetate copolymers, polymerically plasticized PVC, and polyurethane primed ethylene/acrylic acid copolymer. Blends of such materials may be used if desired.
  • the sealing layer is melt-bonded to the microstmctured member in a network of interconnecting bond lines to form an array of sealed cells containing a plurality of cube comer elements.
  • a network of interconnecting bond lines to form an array of sealed cells containing a plurality of cube comer elements.
  • such network of bonds and the body of the sealing layer provide hermetically sealed cells of retroreflective elements in which an air interface on the surfaces of the cube comer elements is maintained.
  • the microstmctured surface may be metallized and the sealing layer may be melt-bonded to the metal surface substantially continuously or in discontinuous fashion.
  • the sealing layer functions to bond the microstmctured member to the backing member via melt-bonding, e.g., high frequency welding and/or patterned thermal welding.
  • the backing layer optionally yet preferably further comprising the sealing layer extends beyond the peripheral boundaries of the retroreflective layer.
  • flaps 400 may comprise this backing layer in the absence of the retroreflective layer. Accordingly, upon folding and bonding the flaps as depicted in FIG. 5, one edge of the pocket member 500 includes a bonded fold of the backing.
  • a pair of rectangular shaped flaps e.g. 450 of FIG. 4 may be employed.
  • FIG. 2 Each of bonds 240 were 9 inches (23 cm).
  • the opening 220 had a dimension of 2
  • a comer portion was prepared using a triangular-shaped piece of one of two types of retroreflective sheeting commercially available from 3M Company, St. Paul, MN under the trade designations "3M Fluorescent Rollup Sign Sheeting Series RS30" (“RS34") and “3M Diamond Grade Fluorescent Rollup Sign Sheeting Series RS20” (“RS24”).
  • the non-viewing surface of the sheeting was bonded to triangular-shaped pieces of various pocket materials as described in each of the examples.
  • Retroreflective Sheeting RS34
  • Retroreflective Sheeting RS24
  • Retroreflective Sheeting The topfilm and cube comer retroreflective layer from RS34 Backing/Pocket Substrate: The Architent film of Example 1 was cut in the shape of a diamond, folded into a triangle such that the fold was aligned with reference numeral 241 and then welded to the non- viewing surface of the retroreflective layer.
  • Retroreflective Sheeting RS34
  • Example 5 was the same as Example 4 except that the RS20 retroreflective sheeting was utilized.
  • Retroreflective Sheeting RS34
  • Example 5 was the same as Example 6 except that the RS20 retroreflective sheeting was utilized.
  • the bond strength of each of Examples 1-7 was inspect and evaluated by hand.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

La présente invention concerne un article souple tel qu'un panneau déroulable comprenant une poche, cette poche convenant à l'introduction d'un support.
PCT/US2005/006235 2004-03-18 2005-02-25 Article souple a poche WO2005093162A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/804,867 US20050208239A1 (en) 2004-03-18 2004-03-18 Flexible article comprising pocket
US10/804,867 2004-03-18

Publications (1)

Publication Number Publication Date
WO2005093162A1 true WO2005093162A1 (fr) 2005-10-06

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PCT/US2005/006235 WO2005093162A1 (fr) 2004-03-18 2005-02-25 Article souple a poche

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WO (1) WO2005093162A1 (fr)

Families Citing this family (3)

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US20070237578A1 (en) * 2006-03-31 2007-10-11 3M Innovative Properties Company Flexible sleeve
BRPI0907219A8 (pt) * 2008-01-14 2015-09-29 Avery Dennison Corp retrorrefletor para uso em aplicações de tela de toque e sistemas de sensor de posição
WO2011072219A2 (fr) * 2009-12-11 2011-06-16 Avery Dennison Corporation Systèmes de détection de position destinés à être utilisés dans des écrans tactiles et film prismatique utilisé dans ces systèmes

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