EP0381886B1 - Bande de marquage sur des surfaces - Google Patents

Bande de marquage sur des surfaces Download PDF

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Publication number
EP0381886B1
EP0381886B1 EP89309041A EP89309041A EP0381886B1 EP 0381886 B1 EP0381886 B1 EP 0381886B1 EP 89309041 A EP89309041 A EP 89309041A EP 89309041 A EP89309041 A EP 89309041A EP 0381886 B1 EP0381886 B1 EP 0381886B1
Authority
EP
European Patent Office
Prior art keywords
roadway
upper layer
layer
reflective
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89309041A
Other languages
German (de)
English (en)
Other versions
EP0381886A1 (fr
Inventor
Charles W. Wyckoff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRITELINE Corp
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BRITELINE Corp
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Filing date
Publication date
Application filed by BRITELINE Corp filed Critical BRITELINE Corp
Priority to AT89309041T priority Critical patent/ATE98310T1/de
Publication of EP0381886A1 publication Critical patent/EP0381886A1/fr
Application granted granted Critical
Publication of EP0381886B1 publication Critical patent/EP0381886B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/576—Traffic lines
    • E01F9/578—Traffic lines consisting of preformed elements, e.g. tapes, block-type elements specially designed or arranged to make up a traffic line

Definitions

  • the present invention relates to surface marker strips as for roadways, pavements and other surfaces, being more particularly directed to methods of providing better roadway-adhering and longer-life properties to such marker strips, and to marker strips or tapes with preformed ridges adhered to the roadways and the like of vastly improved integrity and life that, by reflection and/or retroreflection from the ridges, enable enhanced visibility, especially upon illumination by the headlights of approaching vehicles.
  • a paramount problem with preformed plastic pavement marker strips of the prior art is that of providing satisfactory adherence to the road surface under the constant heavy pounding of motor vehicle traffic.
  • the pavement marker has a deformable layer of elastomeric material which lacks memory positioned between the marker and the road surface, good adhesion will not always be achieved.
  • This layer must deform readily and flow without memory into the irregular surface contours of the pavement. The deformability and ability to cold flow permits the absorption of the energy of vehicle tire impacts which would otherwise violently dislodge the pavement marker as the impact energy is dissipated.
  • adhesion to the road surface is weakened when the road is wet because the stretch-return action of such a memory material causes a pumping action to occur in which water-bearing dirt is forced between the material and the road surface. Dirt then becomes deposited between the adhesive material and the road surface and ultimately destroys the adhesive properties holding the pavement marker to the road.
  • any protruberance such as a ridge or wedge on the surface very quickly disappears when impacted by vehicular traffic so that the ridges flatten out and lose shape under the pressure of the vehicle tires. This, of course, defeats the primary purpose of high visibility of the protruberances or ridges at low veiwing angles.
  • the ridges were comprised of a harder or more rigid material such as, for example, polyvinyl choride or epoxy or some other rigid or semi-rigid material, they would soon be engulfed by the non-memory cold flow characteristic of the base material under the pressure of the traversing traffic. Once depressed into the base material, the ridges would no longer protrude above a film of rain water and would thus be useless as high visibility ridges for wet night visibility.
  • the elastic property of the vulcanized top portion comprising the ridge structure contains sufficient memory to permit such restoration of shape, such is not enough to inhibit deformability of the soft elastomeric bottom portion which conforms to the road surface and which, with its non-memory property, readily absorbs the shock energy of the wheel impacts of the vehicular traffic.
  • An object of the invention accordingly, is to provide a new and improved marker strip or tape for roadways and the like that is not subject to the previously described short-comings of prior devices but that, through a layered combination of a non-vulcanized lower rubber-like surface that conformably adheres to the roadway and an upper vulcanized rubber-like surface containing the marker ridges provides long-lasting adhesion and integrity of the ridges during use.
  • a marker strip for a roadway comprising a rubber-like sheet having a bottom layer and surface for adhesive attachment to the roadway, and an upper layer with a reflective upper surface from which incident light from a vehicle travelling along the roadway may be reflected to indicate the roadway direction characterised in that the upper layer is cross-link vulcanized so as to provide said upper layer with memory characteristics to enable restoration of depression of the upper layer caused by vehicle wheels travelling thereover while the bottom layer remains unvulcanized with cold-flow characteristics and conformably adheres to the roadway.
  • the base material 1 of the marker strip or tape is shown as comprised of a non-vulcanized rubber mixture in sheet form which lacks memory and is easily deformed because it is soft and exhibits cold flow characteristics. It is comprised of a rubber polymer such as acrylonitrile-butadiene in a non- vulcanized state.
  • reinforcing fibers, a pigment, and other processing aids are also included.
  • Table I An example of a typical formulation is listed in Table I in which the reinforcing fiber is given as wood pulp-like cellulose fibers. Other types of fibers including thermoplastic reinforcing fibers may be used without seriously degrading the deformability characteristic of the sheeting.
  • the bottom portion or layer of this material is left in this un-vulcanized cold-flow non-memory condition, and is attached by adhesive 6 ( Figures 5 and 6) along the bottom surface to the roadway R.
  • the top portion of the rubber sheeting material comprising the marker strip is to be vulcanized to provide it with memory characteristics.
  • the top layer may be treated as by a shallow layer of peroxide material 1′ which penetrates the rubber sheeting to a limited depth depicted by the speckled area of Figures 1 and 2. Because of the presence of peroxide or equivalent treatment, this region of the rubber sheeting can be readily cross-linked or vulcanized by the addition of heat.
  • the sheet of Figure 1 Prior to the heat, it has the same characteristics as the remainder of the sheet; i.e. it is soft, easily deformed and lacks memory.
  • the sheet of Figure 1 has been embossed in the top surface with protruding wedges or ridges 3 and then heat is applied immediately thereafter in order to cross-link or vulcanize and harden this ridged top layer that had been permeated with peroxide, imparting to the ridges a permanent memory such that they can maintain shape with cold flow after vehicular depression, while the bottom of the sheeting 1 remains unvulcanized (not cross-linked) and thus deformable and memory-free to provide the necessary shock energy absorption of vehicular traffic and with conformability, to assist the adhesion in securing the marker to the road surface R.
  • the protruding ridges or wedges 3 may be in the form of transversely extending parallel rows, successively longitudinally spaced along the strip, and may be segmented into ridge or wedge blocks, if desired, preferably with a trapezoidal crosssection providing inclined or near-vertical front and rear surfaces 1′′ for reflecting incident low-angle headlight illumination as described in said patents.
  • the rubber sheeting base material consists of a two-ply laminate comprising a vulcanizable upper layer 2 laminated on top of a non-vulcanizable rubber sheeting layer 1.
  • Layer 2 may contain the same ingredients as layer 1 in addition to vulcanizing agents, such as sulfur (Table II) or other compounds which react with the rubber to cross-link or vulcanize it to completion after the protruberances 3, Figure 4, have been formed.
  • vulcanizing agents such as sulfur (Table II) or other compounds which react with the rubber to cross-link or vulcanize it to completion after the protruberances 3, Figure 4, have been formed.
  • the top-embossed surface of Figure 4 has a retro-reflecting bead-bonding layer 4 covering the entire surface.
  • This layer may be any suitable bead bonding layer such as a vinyl acetate copolymer, a polyurethane, an epoxy or any material which will satisfactorily bond the glass retroreflective microspheres 5 to the structure, curing during the curing of the upper layer of the strip.
  • the bead bonding layer 4 can be applied to the surface either prior to or after the ridges are embossed or otherwise formed.
  • the coating of glass microspheres or beads 5 is applied to this layer 4 prior to solidification of the layer. After vulcanization of the top ridged layer, the beads become secured in a partially embedded manner therein with the beads partially exposed including especially on the inclined or near-vertical front and rear surfaces 1′′ of the ridges or protruberances facing traffic.
  • the glass microspheres 7 are embedded in the cross-linked top portion of the rubber sheeting of Figure 2. This can be accomplished prior to embossing or during the embossing process itself.
  • the glass microspheres 7 are only partially embedded on the near-vertical or inclined faces of the ridges 3, whereas those shown typically at 8 are fully embedded during the embossment.
  • silane is helpful either incorporated with the base material or as a coating on the microspheres or both.
  • the adhesive layer 6, shown in Figures 5 and 6 bonds the marker to the road surface R and should exert as little influence as possible on the conformability characteristics of the product to insure good adhesion to the road surface.
  • the marker strips or tapes of the invention may be formed by the following illustrative methods of construction which provide the ability to maintain the ridged shape and still permit road surface conformability to assist in good adhesion thereto.
  • the embossed material was then heated at 180°C (350°F) for 3 minutes during which time the upper layer 1' ( Figure 2) of the rubber sheeting impregnated with the peroxide became cross-linked.
  • the surface durometer was measured at 65-70, whereas before treatment with the peroxide it was only 40.
  • the embossed strip containing the ridged pattern was then positioned beneath a flat sheet of metal and the wheel of a 1 1/2 ton pick-up truck which was allowed to stand over this strip for 10 minutes, depressing the ridges. Inspection of the sample showed that the ridges had flattened to approximately 10% of their normal height. After a 10-minute waiting period, it was observed that the strip showed full recovery of the ridges and restoration to original shape. A similar test but without application of the peroxide failed to recover at all when subjected to the wheel loading for as short a time as 15 seconds.
  • the ingredients in TABLE 1 were compounded into sheet form as in EXAMPLE 1 to form two separate sheets 1 and 2 ( Figure 3).
  • the sheet 1 was calendered to a thickness of 0.10cm (0.040 inch).
  • the layer 2 after the addition of precipitated sulfur in the amount of 3% total weight of rubber, was calendered to produce a 0.05cm (0.020) inch thick sheet.
  • the sheets 1 and 2 were then laminated together and impressed with a ridged pattern 3 and heated at 180°C (350°F) for 9 minutes during which time the sulfur reacted with the rubber to effect vulcanization of the upper embossed layer 2 ( Figure 4).
  • the strip was subjected to the truck tire weight for 10 minutes and reacted in a similar manner to the previous test, recovering fully after a 10 minute waiting period.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Signs Or Road Markings (AREA)
  • Decoration Of Textiles (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Laminated Bodies (AREA)
  • Road Paving Structures (AREA)

Claims (11)

  1. Bande de signalisation pour une chaussée, comprenant une feuille semblable à du caoutchouc ayant une couche inférieure (1) et une surface de fixation par collage sur la chaussée, et une couche supérieure (1', 2) avec une surface supérieure réfléchissante (1'', 5) sur laquelle la lumière incidente d'un véhicule se déplaçant le long de la chaussée peut se réfléchir afin d'indiquer l'orientation de la chaussée, caractérisée en ce que la couche supérieure (1', 2) est vulcanisée par réticulation afin de former ladite couche supérieure (1', 2) avec des caractéristiques de mémoire qui permettent de reformer l'affaissement de la couche supérieure (1', 2) provoqué par les roues du véhicule se déplaçant dessus tandis que la couche inférieure (1) reste non vulcanisée avec des carctéristiques de fluage à froid et adhère à la chaussée en s'y conformant.
  2. Bande de signalisation pour chaussée selon la revendication 1, dans laquelle ladite surface réfléchissante est formée en plaçant successivement des bossages (5) en forme de perles réfléchissantes partiellement enrobés dans ladite couche supérieure (1', 2).
  3. Bande de signalisation pour chaussée selon la revendication 1, dans laquelle ladite couche supérieure (1', 2) porte des bossages (3) en forme d'arêtes ou de nervures, les côtés avant et arrière au moins des bossages (3) ayant des perles réfléchissantes (5) partiellement enrobées à l'intérieur.
  4. Bande de signalisation pour chaussée selon l'une quelconque des revendications précédentes, dans laquelle la couche supérieure (1', 2) et la couche inférieure (1) sont les parties de la feuille intégrée.
  5. Bande de signalisation pour chaussée selon l'une quelconque des revendications 1 à 3, dans laquelle les couches supérieure et inférieure constituent une paire de feuilles lamifiées (1, 2) dont seule la couche supérieure (2) est vulcanisée.
  6. Bande de signalisation pour chaussée selon l'une quelconque des revendications précédentes, dans laquelle la couche inférieure (1) est couverte d'un adhésif (6) sur sa surface apparente afin de venir en contact avec la chaussée.
  7. Procédé de préparation d'une bande de signalisation pour chaussée comprenant la formation d'une feuille analogue à du caoutchouc ayant une couche inférieure (1) et une surface destinée à être fixée par collage sur la chaussée et une couche supérieure (1', 2) avec une surface réfléchissante (1'', 5) sur laquelle la lumière incidente d'un véhicule se déplaçant le long de la chaussée peut se réfléchir, caractérisé par le traitement de la couche supérieure (1') et de la surface pour les préparer à un traitement thermique, et la vulcanisation par réticulation de la couche supérieure (1', 2) et de la surface sous l'effet du traitement thermique tout en gardant les caractéristiques de fluage à froid de la couche inférieure (1) et de la surface de la feuille pour permettre de rétablir l'affaissement de la couche supérieure (1', 2) et de la surface sous l'effet de la circulation des véhicules en même temps que la conformité de la couche inférieure (1) avec la chaussée.
  8. Procédé selon la revendication 7, dans lequel des bossages en forme de perles réfléchissantes (5) placés successivement sont partiellement enrobés dans ladite couche supérieure pour former ladite surface réfléchissante avant ladite vulcanisation par réticulation sous l'effet du traitement thermique.
  9. Procédé selon la revendication 7, dans lequel la formation de bossages (3) en forme d'arêtes ou de nervures est prévue dans la couche supérieure (1', 2) ainsi que l'enrobage partiel de perles réfléchissantes (5) au moins dans les faces avant et arrière des bossages (3).
  10. Procédé selon la revendication 8 ou 9, dans lequel lesdites perles (5) sont appliquées dans un liant (4) qui durcit en même temps que ladite couche (1', 2) et surface supérieure.
  11. Procédé selon l'une quelconque des revendications 7 à 10, dans lequel ledit traitement thermique se fait avec du soufre, ladite couche supérieure étant une feuilles distincte (2) qui est vulcanisée et lamifiée sur une feuille inférieure distincte de fluage à froid pour forer ladite couche inférieure (1).
EP89309041A 1989-02-10 1989-09-06 Bande de marquage sur des surfaces Expired - Lifetime EP0381886B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89309041T ATE98310T1 (de) 1989-02-10 1989-09-06 Oberflaechenmarkierungsstreifen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30931289A 1989-02-10 1989-02-10
US309312 1989-02-10

Publications (2)

Publication Number Publication Date
EP0381886A1 EP0381886A1 (fr) 1990-08-16
EP0381886B1 true EP0381886B1 (fr) 1993-12-08

Family

ID=23197671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89309041A Expired - Lifetime EP0381886B1 (fr) 1989-02-10 1989-09-06 Bande de marquage sur des surfaces

Country Status (8)

Country Link
EP (1) EP0381886B1 (fr)
JP (1) JP2718779B2 (fr)
KR (1) KR970002857B1 (fr)
CN (1) CN1020775C (fr)
AT (1) ATE98310T1 (fr)
CA (1) CA1322486C (fr)
DE (1) DE68911288T2 (fr)
ES (1) ES2049328T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016231A1 (fr) * 1994-11-17 1996-05-30 Minnesota Mining And Manufacturing Company Articles magnetiques conformables pour des surfaces destinees a la circulation
JP3717938B2 (ja) * 1995-06-29 2005-11-16 ミネソタ マイニング アンド マニュファクチャリング カンパニー 湿潤再帰反射性標識材料
ZA965382B (en) * 1995-06-29 1997-12-25 Minnesota Mining & Mfg Wet reflective marking material.
US6703108B1 (en) 1995-06-29 2004-03-09 3M Innovative Properties Company Wet retroreflective marking material
US6303058B1 (en) 1996-06-27 2001-10-16 3M Innovative Properties Company Method of making profiled retroreflective marking material
CN1141451C (zh) * 1997-03-31 2004-03-10 美国3M公司 宽广入射角反射板及其制造方法
JP5643672B2 (ja) * 2011-02-07 2014-12-17 東日本旅客鉄道株式会社 弾性床材

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH408983A (it) * 1962-04-13 1966-03-15 Eigenmann Gino Procedimento per formare un elemento laminare per segnaletica stradale orizzontale
GB1245834A (en) * 1967-09-05 1971-09-08 Ludwig Eigenmann Roadway surface marking, and marked road
DE2208983B2 (de) * 1972-02-25 1974-01-10 Chemiegesellschaft Gundernhausen Mbh, 6101 Gundernhausen Markierungskörper für Verkehrsflächen und Verfahren zu ihrer Herstellung
IT1022451B (it) * 1974-09-30 1978-03-20 Eigenmann Ludwig Striscia prefabbricata per segnale tica stradale orizzontale e metodo per la sua prefabbricazione
US4117192A (en) * 1976-02-17 1978-09-26 Minnesota Mining And Manufacturing Company Deformable retroreflective pavement-marking sheet material
US4681401A (en) * 1982-02-22 1987-07-21 Wyckoff Charles W Sheet material marker surface for roadways and the like
US4490432A (en) * 1982-04-23 1984-12-25 Minnesota Mining And Manufacturing Company Reinforced pavement-marking sheet material
US4388359A (en) * 1982-04-23 1983-06-14 Minnesota Mining And Manufacturing Company Embossed pavement-marking sheet material

Also Published As

Publication number Publication date
ES2049328T3 (es) 1994-04-16
EP0381886A1 (fr) 1990-08-16
KR900013150A (ko) 1990-09-03
CN1044837A (zh) 1990-08-22
KR970002857B1 (ko) 1997-03-12
CN1020775C (zh) 1993-05-19
CA1322486C (fr) 1993-09-28
DE68911288D1 (de) 1994-01-20
JP2718779B2 (ja) 1998-02-25
JPH02221507A (ja) 1990-09-04
ATE98310T1 (de) 1993-12-15
DE68911288T2 (de) 1994-06-30

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