WO2002028625A1 - Bonding system for pipe insulation - Google Patents
Bonding system for pipe insulation Download PDFInfo
- Publication number
- WO2002028625A1 WO2002028625A1 PCT/US2001/030988 US0130988W WO0228625A1 WO 2002028625 A1 WO2002028625 A1 WO 2002028625A1 US 0130988 W US0130988 W US 0130988W WO 0228625 A1 WO0228625 A1 WO 0228625A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- films
- density polyethylene
- tube
- bonding system
- intermediate substrate
- Prior art date
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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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/17—Rigid pipes obtained by bending a sheet longitudinally and connecting the edges
Definitions
- This invention relates to closure, locking, or securement systems for numerous products having one surface to be secured to another surface and, more particularly, to elongated, thermoplastic or elastomeric tubes formed for peripherally surrounding elongated pipes, poles, support rods and the like wherein the closure system is intimately bonded to the tube and is easily sealable for securely mounting the tube about the pipe, rods, or poles.
- foam tubes are employed as cushioning means to surround and protect pipes, poles, rods, etc. , such as found with play equipment.
- the otherwise hard metal surface is protected and effectively converted into a soft, cushioned surface for preventing injuries.
- the most popular insulation systems comprise wrapping fiberglass around the elongated pipes, or installing elongated, pre-cut cylindrically shaped tubes of elastomeric or thermoplastic material. Due to the ease of installation and handling, the pre-slit thermoplastic or elastomeric insulating tubes have become extremely popular.
- the tube In order to install these insulating tubes, the tube is merely opened along the longitudinally extending slit formed therein and extending the entire length of the tube. In this way, the insulating tube is quickly and easily positioned about the fluid carrying conduit, providing the desired insulation thereto. In addition, pipe bends or other junctions are easily handled by merely cutting the tubes to the appropriate shape in order to meet with the adjacent insulation material. In order to properly install the pre-slit, elongated insulating tubes, the longitudinally extending tube must be sealed to prevent unwanted heat loss or water seepage through the slit. It is this requirement for sealing the tube which has caused the greatest challenges.
- These self-sealing systems include pressure sensitive adhesive strips affixed to the tube along one or both side edges of the slit or adjacent the slit and an elongated tongue-and-groove closure system, with the tongue-and-groove longitudinally extending along the entire length of the tube, formed in the opposed side walls of the slit.
- the pressure sensitive adhesive seams generally have a pressure sensitive adhesive adhered to both walls of a longitudinally slit insulation tube in which the pressure sensitive adhesive is protected by one or two removable release liners.
- the lap seal systems are insulation closure systems that are adhered by some means, such as lamination or pressure sensitive adhesive, to the exterior surface of the product. The seam is sealed by pulling the lap across the longitudinal slit and adhering it to the opposite outside surface of the insulation, which may or may not have a receiving pressure sensitive adhesive or substrate attached to the surface.
- Lap seals are most often utilized in the fiberglass industry. It seems that the lap seal systems found in the industry today do not incorporate a pressure sensitive adhesive bond along the walls of the longitudinal slit. The probable reason for the absence of the pressure sensitive adhesive bond in these systems is economical. By not having that pressure sensitive adhesive bond under the lap seal, the insulation value can diminish and the vapor barrier can become very weak and easily overcome, especially if the FSK liner around the fiberglass gets punctured or torn. If the lack of insulating value causes a pipe to condensate, moisture will build along the longitudinal seam and cause the lap seal to be weakened to the point of failure.
- the most popular bonding system consists of a longitudinally slit tube with pressure sensitive adhesive applied to the side walls or edges, protected by two removable release liners.
- the end user slides the insulation over the piping system, pulls the two release liners, and engages the seam under pressure.
- Improper installation is the other leading cause of seam failure.
- Most insulation should be installed at a temperature greater than 35 °F. Ideally, it should be installed at 70 °F. The colder the ambient temperature at installation, the higher the pressure required to engage the pressure sensitive adhesives. If the installer does not apply enough pressure to totally engage the pressure sensitive adhesive, then a gap is left on the inside of the seam. Failures then occur in the same manner as the "creep" phenomenon.
- a closure system for elongated, thermoplastic or elastomeric tubes which is integrally affixed to the tube, is quickly and easily employed, and provides substantially enhanced, bonded engagement of the abutting side edges.
- Another object of the present invention is to provide a closure system for elongated, thermoplastic or elastomeric tubes, having the characteristic features described above which provides a high degree of insulation for preventing or reducing heat loss from fluid carrying pipes or for protecting hard surfaces, which is convenient to employ, and provides a dependable, secure locking interengagement that is achieved with simplicity and ease, assuring time-efficient installation thereof.
- a further object of the present invention is to provide a closure system for elongated, thermoplastic or elastomeric tubes, having the characteristic features described above, which is inexpensive to manufacture and provides a secure, dependable, trouble-free bonded interengagement with the tube, virtually eliminating unwanted peeling, dislodgement, and product creep.
- Another object of the present invention is to provide a closure system for elongated, thermoplastic or elastomeric tubes, having the characteristic features described above, which allows the tubes to be quickly, easily, and inexpensively installed.
- an intermediate substrate is employed, with the substrate being treated with an adhesion promoter.
- the intermediate substrate which is treated with an adhesion promoter as an integral component of the sealing system of the present invention, cohesive bonding is achieved in a sealing system which virtually eliminates opening of the thermoplastic or elastomeric tube without degradation of the material itself.
- the adhesion promoting agent may comprise of a treatment for the intermediate substrate or may comprise of a separate layer affixed to the substrate.
- a desired amount of insulation is imparted to a pipe or conduit by mounting an elongated tube, in peripheral, surrounding engagement therewith.
- the tube is formed of substantially thick material.
- the elongated tube is formed from a foamed, cellular thermoplastic or elastomeric material.
- foamed, closed cell polyethylene is foamed, closed cell polyethylene.
- This material is cellular foamed thermoplastic material which provides a high degree of insulation for its size and weight.
- other materials with substantially equivalent characteristics may be employed without departing from the scope of this invention.
- the elongated tube is effectively integrally bonded to itself.
- a virtual 100% adhesive interengagement is attained, and a sealing system is achieved which is incapable of being opened or removed from the tube.
- removal of the adhesive system is attained only by physically destroying the integrity of the elongated polyethylene, thermoplastic, or elastomeric foamed tube itself.
- prior art closure systems have been developed which employ a pressure sensitive adhesive backed carrier tape or film which is affixed to the foam tube by contacting the adhesive layer with the foam tube.
- thermoplastic and elastomeric foam tube slits are comprised of extremely irregular, non-smooth surfaces which incorporate numerous depressions or craters randomly dispersed throughout the surface. This construction results in randomly located upstanding ridges or sections forming the outer peripheral surface thereof.
- various materials can be employed for use as the intermediate substrate employed in the sealing system defined herein.
- One material which has been found to work effectively is a polyester film.
- an adhesion promoter or applying the adhesion promoter as a separate layer affixed to the substrate, and permanently adhering the polyester film to at least one side edge of the elongated slit of the thermoplastic or elastomeric tube, a new bonding system is attained which provides mechanical cohesive bonding which is substantially greater than the adhesive bonding provided by prior art pressure sensitive adhesives.
- the preferred intermediate substrates employed in the present invention are selected from materials that naturally incorporate numerous pockets or pits on its surface, or are responsive to adhesion promoting agents to form such pockets or pits.
- polyester films represent one of the preferred materials to employ for the intermediate substrate.
- an adhesion promoter Prior to application of the intermediate substrate to the thermoplastic or elastomeric tube, an adhesion promoter is applied as a coating on the intermediate substrate or a treatment for the intermediate substrate.
- the application of the adhesion promoter causes the surface energy of the substrate to increase, while the surface tension of the film is lowered. This makes the film much more receptive to bonding than other materials, such as pressure sensitive adhesives which surface energies are very low.
- the application of the intermediate substrate to only one side edge of the slit is sufficient to provide the cohesive bonding achieved by the present invention.
- the treated intermediate substrate may be applied to both side edges of the slit of the elongated, thermoplastic or elastomeric tube.
- the intermediate substrate after being treated with the adhesion promoter, is affixed to one side edge of the elongated slit of an elongated, thermoplastic or elastomeric tube by applying a pressure sensitive adhesive to either one surface of the substrate or to the side edge of the thermoplastic or elastomeric tube. Then, the substrate is securely affixed to the side edge of the thermoplastic or elastomeric tube. Since the substrate has been treated on both sides thereof with the adhesion promoter, a cohesive bond is achieved between the intermediate substrate and the thermoplastic or elastomeric tube.
- a pressure sensitive adhesive is applied to the opposing side edge of the slit of the thermoplastic or elastomeric tube, with the pressure sensitive adhesive being protected by a release strip or liner which prevents the adhesive from becoming actively engaged with the intermediate substrate affixed to the opposed edge of the slit, until the liner has been removed.
- the pressure sensitive adhesive When the pressure sensitive adhesive is brought into engagement with a surface of the intermediate substrate to which the adhesion promoter has been applied, the pressure sensitive adhesive is easily forced into the pockets of the substrate, forming a mechanical, cohesive bond therebetween.
- This interengage- ment establishes a cohesive bond between the edges of the slit of the thermoplastic or elastomeric tube which is not easily separated.
- This bonded engagement achieves a sealing system which eliminates all of the prior art difficulties and provides the desired secure affixation of the thermoplastic or elastomeric tube in the precisely desired location, with assurance that unwanted opening of the tube is eliminated.
- the invention accordingly comprises the several steps and relation of one or more such steps with respect to each of the others, and the article possessing the features, property, and relation of elements which are exemplified in the following detailed disclosure, and the scope of the invention will be indicated in the claims.
- FIGURE 1 is a cross-sectional side elevation view of a slit, foam, thermoplastic or elastomeric tube incorporating the self-sealing bonding/securement system of the present invention mounted to the side edges thereof;
- FIGURE 2 is an enlarged cross-sectional side elevation view of Section "A" of FIGURE 1;
- FIGURE 3 is an enlarged cross-sectional side elevation view of Section "B" of FIGURE 2;
- FIGURE 4 is a cross-sectional side elevation view of a slit, foam, thermoplastic or elastomeric tube incorporating an alternate embodiment of the self-sealing bonding/securement system of the present invention mounted to the side edges thereof;
- FIGURE 5 is an enlarged cross-sectional side elevation view of Section "A" of FIGURE 4.
- FIGURE 6 is an enlarged cross-sectional side elevation view of Section "B" of FIGURE 5.
- FIGURES 1-6 the construction and operation of the preferred embodiment of the unique, self- sealing, bonding/securement system of the present invention can best be understood.
- the substantially enhanced, self-sealing, bonding/securement system of the present invention may be employed in a wide variety of products including elongated, foamed thermoplastic or elastomeric tube members, packaging, bedding products, home decoration systems, custom made foam profiles, and toys.
- FIGURES 1-6 and the following detailed disclosure focus upon the use of the bonding system of the present invention in connection with pre-slit, elongated, foamed thermoplastic or elastomeric tubes.
- the present invention achieves a cohesive bond between the two surfaces being secured, as opposed to the conventional adhesive bond found in prior art systems. Furthermore, although a cohesive bond is typically created either chemically or mechanically, the present invention employs both chemical and mechanical elements to achieve the resulting bond.
- an adhesion promoting agent is applied to an intermediate substrate and, thereafter, the substrate is affixed to one of the surfaces being bonded, using a pressure sensitive adhesive.
- the application of the adhesion promoting agent to the intermediate substrate causes a chemical interaction with the surfaces of the substrate to create pockets or pits therein.
- the adhesion promoting agent may be applied as a separate layer formed on the substrate or interact with the surface of the substrate.
- the two surfaces are brought together, causing the mechanical engagement of the pressure sensitive adhesive in the pockets or pits formed in the surface of the substrate and/or the adhesion promoting agent layer. Due to the application of the adhesion promoting agent, this mechanical engagement provides the desired cohesive bonding of the two surfaces.
- the self- sealing, bonding/securement system is affixed to the inside edges of a longitudinal slit formed in an elongated, foamed, thermoplastic or elastomeric tube.
- self-sealing, bonding/securement system 20 is affixed to edges 21 and 22 of elongated, foamed, thermoplastic or elastomeric tube 23.
- Edges 21 and 22 represent the juxtaposed, spaced, facing side edges formed in thermoplastic or elastomeric tube 23 by longitudinally slitting tube 23 to enable tube 23 to be mounted into peripheral surrounding engagement with any desired pipe, rod, pole, or the like.
- pressure sensitive adhesive 24 is applied to edge 22 of thermoplastic or elastomeric tube 23, with release liner 25 mounted to pressure sensitive adhesive 24 in overlying engagement therewith.
- release liner 25 incorporates a coating material 26, such as silicone, in order to enable release liner 25 to be easily removed from pressure sensitive adhesive 22 when desired by the user.
- the release liner comprises one material selected from the group consisting of polyester films, polypropylene films, metallocene-based films, nylon films, metallized films, metal strips, polyethylene films, including high density polyethylene, low density polyethylene, and linear low density polyethylene, copolymer films, rubber films, fiber reinforced films and paper.
- release liner 25 Although various materials may be employed for release liner 25, a polyester film, is preferred.
- This overall construction is generally similar to prior art sealing systems wherein a pressure sensitive adhesive and release liner are affixed to one or both side edges of an elongated, foamed, thermoplastic or elastomeric tube.
- side edge 21 of thermoplastic or elastomeric tube 23 incorporates a layer of pressure sensitive adhesive 24 affixed directly thereto, with intermediate substrate 30 affixed to pressure sensitive adhesive layer 24 in direct, overlying, contacting, engagement therewith.
- intermediate substrate 30 incorporates a coating layer 31 of an adhesion promoting agent which is applied to both surfaces of intermediate substrate 30.
- intermediate substrate 30 is exposed to a coating of an adhesion promoter, on both sides thereof, represented in FIGURE 2 as coating layers 31, 31.
- an adhesion promoter coating layers 31, 31 applied to both surfaces of intermediate substrate 30, intermediate substrate 30 is able to produce a cohesive bond, whenever another adhesive, such as pressure sensitive adhesive 24, is brought into contact therewith.
- another adhesive such as pressure sensitive adhesive 24
- the application of intermediate substrate 30 to side edge 21 in contact with pressure sensitive adhesive 24, with an adhesion promoter coating layer 31 applied to substrate 30 causes cohesive bonding between the intermediate substrate 30 and edge 21 of thermoplastic or elastomeric tube 23.
- intermediate substrate 30 is mounted to edge 21 of tube 23 in this manner, substrate 30 is permanently adhered to edge 21, with removal thereof only being possible by catastrophic damage to the foam thermoplastic or elastomeric material forming tube 23.
- release liner 25 is removed from pressure sensitive adhesive 24 of side 22 of tube 23 and pressure sensitive adhesive 24 of side 22 is brought into interengagement with coating layer 31 of an intermediate substrate 30, a second cohesive bonding is established, securely affixing side edges 21 and 22 of tube 23 together in a manner which prevents separation of the side edges without destruction of the foam thermoplastic or elastomeric material itself.
- foam, thermoplastic or elastomeric tube 23 may be formed from a wide variety of different materials commonly employed for insulating tubes of this general nature.
- the alternate product lines detailed above in which the present invention may be employed further expand the materials on which the self-sealing, bonding/securement system of the present invention may be applied.
- the materials upon which the present invention can be employed is widely diverse, an example of the materials include one or more selected from the group consisting of polyethylenes, polypropylenes, styrene block copolymers, metallocene-based materials, polyurethanes, polystyrenes, chlorinated polyethylenes, cross-linked low density polyethylenes, co- polymers such as ethylene- vinyl acetate (EN A), ethylene-butyl acrylate (EBA), and ethylene-methyl acrylate (EM A) rubber, paper, and dry wall.
- the materials include one or more selected from the group consisting of polyethylenes, polypropylenes, styrene block copolymers, metallocene-based materials, polyurethanes, polystyrenes, chlorinated polyethylenes, cross-linked low density polyethylenes, co- polymers such as ethylene- vinyl acetate (EN A), ethylene-butyl acrylate (EBA), and ethylene-methyl acrylate (EM A
- the adhesive employed on these substrates or base material being bonded may also be widely varied.
- the adhesive may comprise one or more selected from the group consisting of pressure sensitive adhesives, hot melt adhesives, low molecular weight polymers, functionalized polymers, functionalized silicones, functionalized compounds, two component polyurethanes, two components epoxies, rubber based solvents and/or latex, polysulfides sealants/adhesives, two components acrylic based components, cyanoacrylates, and ceramics.
- an intermediate substrate is employed to provide the desired cohesive bonding.
- the intermediate substrate may be formed from a wide variety of materials.
- the material employed for forming the intermediate substrate comprises one or more selected from the group consisting of polyester films, polypropylene films, metallocene-based films, nylon films, metallized films, metal strips, polyethylene films, including high density polyethylene, low density polyethylene, and linear low density polyethylene, copolymer films, rubber films, fiber reinforced films and paper.
- polyester film is preferred, any of these other materials may be employed with equal efficacy.
- an adhesion promoter is applied to at least one surface of the intermediate substrate, and preferably both surfaces thereof. In this regard, it has been found that various materials or application processes may be employed to provide the intermediate substrate with the requisite adhesive promoting treatment.
- the desired cohesive bonding effect can be realized by employing one or more materials or processes selected from the group consisting of low molecular weight polymers, primers or paints, chemical promoters, functionalized polymers, functionalized silicones, corona or plasma applications, heat applications, UV exposure, infrared exposure, and electron beam applications. Although any of these materials or processes may be employed, it has been found that the application of low molecular weight polymers is highly effective in providing the desired result.
- the preferred processes comprise one or more selected from the group consisting of hot melt application, lamination, coextrusion, cross head extrusion, PSA adhesion, electrical energy, and cross linking, such as electron beam and ultraviolet applications.
- the preferred application process comprises using hot melt application of a pressure sensitive adhesive.
- release agents can be employed to enable the release liner for the pressure sensitive adhesive to be easily removed therefrom whenever application and bonding is desired.
- release agents comprise one or more selected from the group consisting of silicones, Teflons, talc, calcium carbonate, and steramides.
- silicones are preferred, any of these other agents may be employed to provide an effective removable strip which protects the pressure sensitive adhesive until its use is desired.
- edges 21 and 22 of elongated, foamed, thermoplastic or elastomeric tube 23 are affixed to edges 21 and 22 of elongated, foamed, thermoplastic or elastomeric tube 23.
- Edges 21 and 22 represent the juxtaposed, spaced, facing side edges formed in thermoplastic or elastomeric tube 23 by longitudinally slitting tube 23 to enable tube 23 to be mounted into peripheral surrounding engagement with any desired pipe, rod, pole, or the like.
- release liner 25 incorporates a coating material 26.
- the release agent comprises one or more selected from the group consisting of silicones, Teflons, talc, calcium carbon- ate, and steramides in order to enable release liner 25 to be easily removed from pressure sensitive adhesive 22 when desired by the user.
- the release liner comprises one material selected from the group consisting of polyester films, polypropylene films, metallocene-based films, nylon films, metallized films, metal strips, polyethylene films, including high density polyethylene, low density polyethylene, and linear low density polyethylene, copolymer films, rubber films, fiber reinforced films and paper.
- polyester films polypropylene films, metallocene-based films, nylon films, metallized films, metal strips, polyethylene films, including high density polyethylene, low density polyethylene, and linear low density polyethylene, copolymer films, rubber films, fiber reinforced films and paper.
- thermoplastic or elastomeric tube 23 incorporates a layer of pressure sensitive adhesive 24 affixed directly thereto, with intermediate substrate 30 affixed to pressure sensitive adhesive layer 24 in direct, overlying, contacting, engagement therewith.
- intermediate substrate 30 incorporates a coating layer 31 of an adhesion promot- ing agent which is applied to both surfaces of intermediate substrate 30.
- intermediate substrate 30 is exposed to a coating of an adhesion promoter, on both sides thereof, represented in FIGURE 5 as coating layers 31, 31.
- an adhesion promoter coating layers 31, 31 applied to both surfaces of intermediate substrate 30, intermediate substrate 30 is able to produce a cohesive bond, whenever another adhesive, such as pressure sensitive adhesive 24, is brought into contact therewith.
- another adhesive such as pressure sensitive adhesive 24
- the application of intermediate substrate 30 to side edge 21 in contact with pressure sensitive adhesive 24, with an adhesion promoter coating layer 31 applied to substrate 30 causes cohesive bonding between the intermediate substrate 30 and edge 21 of thermoplastic or elastomeric tube 23.
- intermediate substrate 30 is mounted to edge 21 of tube 23 in this manner, substrate 30 is permanently adhered to edge 21, with removal thereof only being possible by catastrophic damage to the foam thermoplastic or elastomeric material forming tube 23.
- release liner 25 is removed from pressure sensitive adhesive 24 of side 22 of tube 23 and pressure sensitive adhesive 24 of side 22 is brought into interengagement with coating layer 31 of an intermediate substrate 30, a second cohesive bonding is established, securely affixing side edges 21 and 22 of tube 23 together in a manner which prevents separation of the side edges without destruction of the foam thermoplastic or elastomeric material itself.
- adhesion promotion coating layer 31 to the surfaces of intermediate substrate 30 establishes pockets or pits 33 in coating layer 31 as well as establishing pockets or pits 34 in intermediate substrate 30 itself. These pockets or pits 33 and 34 create substantially enlarged and enhanced surface areas in which the pressure sensitive adhesive is capable of bonding when brought into contact therewith. This effect, coupled with the physical changes imparted to substrate 30 by the application of adhesion promotion coating layer 31 causes the cohesive bonding to be realized.
- release liner 40 comprises adhesive coating 41 affixed thereto which is specially constructed for enabling release liner 40 to be removably mounted to intermediate substrate 30.
- a low tack adhesive is preferably employed.
- adhesive coating 41 is applied to the surface of release liner 40 in a predefined pattern, with the pattern incorporating a plurality of void zones or void areas. It has been found that the ratio of void areas to adhesive covered areas preferably ranges between about 25:75 to 75:25.
- release liner 40 is formed from a film selected from the group consisting of polyester films, polypropylene films, metallocene- based films, nylon films, metallized films, metal strips, polyethylene films, high- density polyethylene films, low density polyethylene films, linear low density polyethylene films, copolymer films, rubber films, fiber reinforced films, and paper.
- adhesive coating 41 preferably comprises a low tack adhesive selected from the group consisting of pressure sensitive adhesives, water-based adhesives, acrylic adhesives, water-based acrylic pressure sensitive adhesives, hot melt adhesives, rubber based adhesives, and silicone based adhesives.
- a static charge can be employed instead of an adhesive for securing release liner 40 to intermediate substrate 30, as well as using heat reactive material for attaining the desired removable engagement of release liner 40 to intermediate substrate 30.
- release liner 40 also comprises a coating 42 which is preferably employed, but which is not mandatory for the efficacious use of the present invention.
- coating 41 preferably comprises a release agent comprising one or more selected from the group consisting of silicones, Teflons, talc, calcium carbonate, and steramides.
- coating layer 42 on release liner 40 is not mandatory, it has been found that the incorporation of coating 42 to release liner 40 on the surface opposed from adhesive 41 is desirable in order to prevent unwanted affixation of adhesive 24 to the uncoated surface of release liner 40 if release liner 25 is removed prior to the removal of release liner 40.
- release liner 25 and release liner 40 are substantially simultaneously, or the removal of release liner 40 prior to release liner 25, instances have occurred where release liner 25 is removed before release liner 40 is removed. In these instances, uncoated exposed surfaces of release liner 40 have been brought into contact with adhesive 24 causing a bond to be formed therebetween. As result, by applying coating 42 to the otherwise exposed surface of release liner 40, any unwanted accidental affixation of adhesive 24 to release liner 40 is eliminated.
- bonding/securement system of the present invention In order to apply the self-sealing, bonding/securement system of the present invention to an elongated, thermoplastic or elastomeric tube, generally conventional in-line or off-line processes may be employed with minimum modification.
- in-line or off-line processes For exemplary purposes, the application of the bonding system of the present invention in an in-line process to a low-density polyethylene foam tube is detailed herein.
- the low-density polyethylene foam tube is extruded in a conventional process for manufacturing pipe insulation material. After passing through a brief cooling process, the foam tube enters a slitter which produces the continuous, longitudinal slit in the tube. Then, after exiting the slitter, the foam tube enters the in- line gluing process, where the adhesive, usually a pressure sensitive adhesive, the release film and the intermediate substrate are affixed to the inside edges of the foam tube.
- the adhesive usually a pressure sensitive adhesive, the release film and the intermediate substrate are affixed to the inside edges of the foam tube.
- the product Upon exiting the in-line glue process, the product is cut to length and loaded into a forced-air cooling elevator. The product spends upward of 10 minutes in the cooling elevator, depending upon line speed, before the product is unloaded from the elevator and packaged for shipment.
- the application system is constructed with two separate feed lines simultaneously delivering material to opposed edges of the thermoplastic or elastomeric tube.
- one feed line delivers the release liner, with the release agent previously applied thereto, while the other feed line delivers the intermediate substrate, onto which the adhesion promoter coating layer has previously been applied.
- two separate and independent glue applicators are employed, with one glue applicator being associated with each feed line.
- a pressure sensitive adhesive is applied directly to one surface of each feed line using a hot melt application technique.
- the glue is applied preferably at about 350° degrees F, and then is rapidly transported directly onto the side edge of the foam tube.
- the hot melt pressure sensitive adhesive is applied and affixed to the side edge of the foam tube in less than one second.
- the intermediate substrate with its adhesion promoter layers on both surfaces thereof, and pressure sensitive adhesive on one surface thereof are affixed to the second side edge of the foam tube.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001296559A AU2001296559A1 (en) | 2000-10-05 | 2001-10-03 | Bonding system for pipe insulation |
MXPA03002407A MXPA03002407A (en) | 2000-10-05 | 2001-10-03 | Bonding system for pipe insulation. |
CA002422139A CA2422139A1 (en) | 2000-10-05 | 2001-10-03 | Bonding system for pipe insulation |
US10/398,176 US20040028863A1 (en) | 2001-10-03 | 2001-10-03 | Bonding system for pipe insulation |
EP01977441A EP1332040A1 (en) | 2000-10-05 | 2001-10-03 | Bonding system for pipe insulation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23797800P | 2000-10-05 | 2000-10-05 | |
US60/237,978 | 2000-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002028625A1 true WO2002028625A1 (en) | 2002-04-11 |
Family
ID=22895993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/030988 WO2002028625A1 (en) | 2000-10-05 | 2001-10-03 | Bonding system for pipe insulation |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1332040A1 (en) |
AU (1) | AU2001296559A1 (en) |
CA (1) | CA2422139A1 (en) |
MX (1) | MXPA03002407A (en) |
WO (1) | WO2002028625A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113266710A (en) * | 2021-04-28 | 2021-08-17 | 安徽杰蓝特新材料有限公司 | Water supply pipe with self-cleaning and antibacterial functions and preparation method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5141793A (en) * | 1990-11-16 | 1992-08-25 | Compac Corporation | Pressure sensitive tape for insulation applications |
-
2001
- 2001-10-03 MX MXPA03002407A patent/MXPA03002407A/en unknown
- 2001-10-03 AU AU2001296559A patent/AU2001296559A1/en not_active Abandoned
- 2001-10-03 CA CA002422139A patent/CA2422139A1/en not_active Abandoned
- 2001-10-03 EP EP01977441A patent/EP1332040A1/en not_active Withdrawn
- 2001-10-03 WO PCT/US2001/030988 patent/WO2002028625A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5141793A (en) * | 1990-11-16 | 1992-08-25 | Compac Corporation | Pressure sensitive tape for insulation applications |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113266710A (en) * | 2021-04-28 | 2021-08-17 | 安徽杰蓝特新材料有限公司 | Water supply pipe with self-cleaning and antibacterial functions and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
EP1332040A1 (en) | 2003-08-06 |
MXPA03002407A (en) | 2003-06-19 |
AU2001296559A1 (en) | 2002-04-15 |
CA2422139A1 (en) | 2002-04-11 |
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