EP1528022A1 - Raccord pour une bande adhésive - Google Patents

Raccord pour une bande adhésive Download PDF

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Publication number
EP1528022A1
EP1528022A1 EP03078391A EP03078391A EP1528022A1 EP 1528022 A1 EP1528022 A1 EP 1528022A1 EP 03078391 A EP03078391 A EP 03078391A EP 03078391 A EP03078391 A EP 03078391A EP 1528022 A1 EP1528022 A1 EP 1528022A1
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EP
European Patent Office
Prior art keywords
adhesive tape
adhesive
splice
composition
tape
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.)
Withdrawn
Application number
EP03078391A
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German (de)
English (en)
Inventor
Axel Schmidt
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.)
3M Innovative Properties Co
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3M Innovative Properties Co
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 Co filed Critical 3M Innovative Properties Co
Priority to EP03078391A priority Critical patent/EP1528022A1/fr
Publication of EP1528022A1 publication Critical patent/EP1528022A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H21/00—Apparatus for splicing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/462—Form of splice
    • B65H2301/4622—Abutting article or web portions, i.e. edge to edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/462—Form of splice
    • B65H2301/4622—Abutting article or web portions, i.e. edge to edge
    • B65H2301/46222—Abutting article or web portions, i.e. edge to edge involving double butt splice, i.e. adhesive tape applied on both sides of the article or web portions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/463—Splicing splicing means, i.e. means by which a web end is bound to another web end
    • B65H2301/4631—Adhesive tape

Definitions

  • the present invention relates to an adhesive tape splice and in particular to an adhesive tape splice for splicing adhesive tapes that may be used for adhering articles such as rubber door seals to a motor vehicle.
  • the invention further relates to a method of making the adhesive tape splice and to an adhesive tape comprising one or more of the adhesive tape splices.
  • the invention in another aspect relates to the use of the adhesive tape for adhering an article to a motor vehicle.
  • Adhesive tapes are well known in the art and have found many applications including in the automotive field where they have been used to adhere an article to the body of a motor vehicle as well as in sealing applications.
  • adhesive tapes have been used to adhere an elastomeric or rubber seal to the frame of a car door or to the frame of the opening of the car door.
  • Such rubber seals are provided to avoid moisture or water to penetrate into the interior of the car.
  • adhesive tapes need to be frequently spliced.
  • the ends of a first and second adhesive tape are pushed against each other and spliced by adhering a pressure sensitive adhesive sheet to the release liners of the tapes being spliced.
  • these splices have presented a number of problems in the use and applications of adhesive tapes.
  • the splice in the adhesive tape is a weak spot in the adhesive tape, which may cause the performance of the adhesive tape to deteriorate over time.
  • the splice may open (as the result of the elastomeric properties of the rubber) and cause water to penetrate in the adhesive tape and/or the interior of the car.
  • the adhesive tape splices can be easily and conveniently made in the manufacturing process of adhesive tapes.
  • the present invention provides an adhesive tape splice joining an end of a first adhesive tape to an end of a second adhesive tape or another end of said first adhesive tape, each of said first and second adhesive tape having opposite major sides and at least one of said sides having an adhesive surface, said splice comprising a hardened composition bonding said end of said first adhesive tape to said end of said second adhesive tape or to said other end of said first adhesive tape.
  • the adhesive tape splices may offer such advantages as better weathering resistances and good to excellent mechanical properties including for example strength of the bond created between the ends of the adhesive tape being spliced. Furthermore, such splices are easy and convenient to make and can be readily used in the manufacturing process of adhesive tapes.
  • the present invention provides an adhesive tape having one or more of the adhesive tape splices.
  • the invention provides for a use of the adhesive tape to adhere an article to a motor vehicle body, e.g. the body of a car, bus or truck.
  • hardenable liquid is meant a liquid composition that can be solidified for example by exposing the liquid to heat or light.
  • the term hardenable liquid thus include liquid compositions that can be solidified or hardened by polymerization as well as through a cross-linking or curing reaction.
  • the adhesive tape splice may splice opposite ends of an adhesive tape together but generally splices a first adhesive tape to a second adhesive tape.
  • the first and second adhesive tapes will generally be of a similar nature and typically may have the same composition.
  • a splice in connection with the present invention may also be used to splice adhesive tapes of different composition to each other.
  • the adhesive tapes that can be spliced together have on at least one major side an adhesive surface.
  • the adhesive tapes will be pressure sensitive adhesive tapes.
  • adhesive tapes having other types of adhesives may be spliced as well.
  • an adhesive tape comprising a heat-activatable adhesive may be spliced as well.
  • heat-activatable adhesive is meant an adhesive that needs to be 'activated' i.e. subject to a heat treatment so as to allow the adhesive to bond to a substrate. Generally such activation involves heating to a temperature of between 60 and 200°C.
  • the adhesive tapes may comprise an adhesive surface on only one major side or on both major sides.
  • the adhesive tapes may comprise on one major side a pressure sensitive adhesive with the opposite major side not having an adhesive surface.
  • the adhesive tape may comprise a pressure sensitive adhesive on both major sides.
  • the adhesive tape may comprise a pressure sensitive adhesive on one major side and a heat-activatable adhesive at the opposite major side.
  • the adhesive tapes for splicing in this invention are preferably pressure sensitive adhesive tapes, i.e. adhesive tapes that comprise on at least one major side a pressure sensitive adhesive.
  • a preferred pressure sensitive adhesive tape comprises a layer of acrylic-type pressure-sensitive adhesive.
  • the pressure-sensitive adhesive layer essentially consists of an acrylic-type pressure-sensitive adhesive.
  • other pressure sensitive adhesives are contemplated as well and may be used.
  • Such other pressure sensitive adhesives include for example those based on silicones or based on polyolefins as disclosed in Handbook of Pressure Sensitive Adhesive Technology (third edition) D.Satas, Ed. Satas and Associates, Warwick RI/USA, 1989 on pages 550-556 and 423-442 respectively.
  • Useful acrylic type pressure-sensitive adhesives include those known to the person skilled in the art. Particularly useful pressure-sensitive adhesives include ultraviolet- radiation polymerized acrylic pressure-sensitive adhesives. Preferably, these pressure-sensitive adhesives are prepared from a composition comprising at least one alkyl acrylate monomer, preferably a monofunctional unsaturated acrylate ester of a non-tertiary alcohol, the molecules of which preferably have from about 4 to about 14 carbon atoms.
  • Such monomers include, e.g., isooctyl acrylate, 2-ethyl hexyl acrylate, isononyl acrylate, decyl acrylate, dodecyl acrylate, butyl acrylate, and hexyl acrylate.
  • the alkyl acrylate monomers can be used to form homopolymers or they can be copolymerized with polar copolymerizable monomers.
  • the alkyl acrylate monomer When copolymerized with strongly polar copolymerizable monomers, the alkyl acrylate monomer generally comprises at least about 75% of the polymerizable monomers.
  • the alkyl acrylate monomer When copolymerized with moderately polar copolymerizable monomers, the alkyl acrylate monomer generally comprises at least about 60% of the monomers.
  • the polar copolymerizable monomers can be selected from strongly polar copolymerizable monomers such as acrylic acid, itaconic acid, hydroxyalkyl acrylates, cyanoalkyl acrylates, acrylamides or substituted acrylamides, or from moderately polar copolymerizable monomers, such as N- vinyl pyrrolidone, acrylonitrile, vinyl chloride, or diallyl phthalate.
  • strongly polar monomers they preferably comprise from about 1 to about 25 parts, preferably from about 4 to about 20 parts of the acrylic copolymer.
  • moderately polar monomers When moderately polar monomers are used, they preferably comprise from about 20 to about 40 parts of the acrylic copolymer.
  • the composition comprising the polymerizable monomers may also contain a photoinitiator in order to induce polymerization of the monomers.
  • a photoinitiator include benzoin ethers, such as benzoin methyl ether or benzoin isopropyl ether, substituted benzoin ethers, such as anisole methyl ether, substituted acetophenone derivatives, such as 2,2-diethoxyacetophenone and 2,2- dimethoxy-2-phenylacetophenone, substituted alpha-ketols, such as 2- methyl-2-hydroxypropiophenone, aromatic sulfonyl chlorides, such as 2-naphthalene sulfonyl chloride and photoactive oximes, such as 1-phenyl-1-propenedione-2(0-ethoxycarbonyl)-oxime.
  • the photopolymerizable composition may also contain a crosslinking agent to enhance heat-resistance.
  • Preferred crosslinking agents for acrylic pressure-sensitive adhesives are multifunctional acrylates such as 1,6- hexanediol diacrylates as well as those disclosed in US-A-4,379, 201, such as trimethylolpropane triacrylate, pentaerythritol tetraacrylate, 1, 2-ethylene glycol diacrylate, and 1,2-dodecanediol diacrylate.
  • crosslinking agents include substituted triazines, such as those disclosed in US-A-4,329,384, US-A-4,391, 687, US-A-4,330,590, e.g., 2,4- bis(trichloromethyl)-6-(3,4-dimethoxyphenyl)-s-triazine and other chromophore halogen-s-triazines.
  • the crosslinking agent is present in an amount of from about 0.01 to about 1 pph, wherein pph means (additional) parts per hundred parts of the total composition.
  • the adhesive tape comprises an acrylic foam layer.
  • foam layer as used in this invention not only includes layers obtained by foaming but any similar layer that includes voids as may be obtained for example by frothing a composition or including hollow spheres in the layer.
  • the adhesive tape may comprise an acrylic cellular pressure-sensitive adhesive membrane as described in US-A-4,415,615. A cellular pressure-sensitive adhesive membrane is made by the steps of
  • Frothing can be conveniently accomplished by whipping a gas into the polymerizable composition. After coating the frothed composition onto a backing, the polymerization may be initiated by ultraviolet radiation as taught in US-A-4,181,752. Where such photopolymerization is desired, an inert frothing gas is preferably used as air tends to quench photopolymerization. Carbon dioxide and nitrogen are preferred frothing gases.
  • the pressure sensitive adhesive layer may be a foam layer prepared from a monomer composition comprising hollow microspheres.
  • Suitable microspheres include glass or polymeric microspheres.
  • the microspheres should have an average diameter of 10 to 200 micrometers, and comprise from about 5 to about 65 volume percent of the core layer.
  • the thickness of foam layers in preferred tapes of the present invention ranges from 0.3 mm to about 4.0 mm in thickness.
  • Preferred glass microspheres have average diameters of about 50 ⁇ m.
  • the pressure sensitive adhesive layer should be at least 3 times as thick as their diameter, preferably at least 7 times.
  • Polymeric microspheres are also useful for some compositions such as those described in US-A-3,615,972, US-A-4,075,238, US-A-4,287,308, and US-A-4, 855,170.
  • Such microspheres are available from Kema Nord Plastics under the trade name "Expancel” and from Matsumoto Yushi Seiyaku under the trade name "Micropearl”.
  • the microspheres In expanded form, the microspheres have a specific density of approximately 0.02-0.036 g/cc. It is possible to include the unexpanded microspheres in the adhesive layer and subsequently heat them to cause expansion, but it is generally preferred to mix in the expanded microspheres. This process ensures that the hollow microspheres in the final layer are substantially surrounded by at least a thin layer of adhesive.
  • the adhesive tape of the present invention may comprise more than one pressure- sensitive adhesive layer.
  • Such further pressure sensitive adhesive layers may consist of a polymerized acrylic copolymer which may incorporate similar or dissimilar acrylic monomers in like or unlike thicknesses, having similar or different additives from those acrylic copolymers contained in another pressure- sensitive adhesive layer.
  • one layer may comprise a foam-like pressure-sensitive acrylic adhesive and a second layer is a non-foam-like pressure-sensitive acrylic adhesive.
  • a foam-like pressure sensitive acrylic adhesive maybe provided on both opposite major sides with non-foam pressure sensitive acrylic adhesive layer.
  • the pressure sensitive adhesive layers may comprise further materials that may be blended with the pressure sensitive adhesive.
  • Such materials include fillers, pigments, fibrous reinforcing agents, woven and non-woven fabrics, foaming agents, antioxidants, stabilizers, fire retardants, and viscosity adjusting agents.
  • the pressure-sensitive adhesive layer further comprises from about 2 to about 15 pph of a hydrophobic silica having a surface area of at least 10 m 2 /g.
  • the adhesive tape comprises a heat-activatable adhesive layer.
  • the adhesive tape will also include a pressure sensitive adhesive layer as described above.
  • Suitable heat-activatable adhesive layers include those based on thermoplastic polymers such as polyurethanes, polyesters and polyamides. Particularly useful are polyolefins.
  • polyolefin resins examples include polyolefin homopolymers, such as polyethylene, polypropylene, polyolefin/polyolefin copolymers, such as ethylene/propylene copolymers (often referred to as polyallomer) and blends thereof.
  • Suitable blends include blends of polyethylene and polypropylene at various ratios.
  • Suitable copolymers may be atactic, isotactic, random, block or impact copolymers.
  • thermoplastic and thermoset substrates effectively adhere to both thermoplastic and thermoset substrates.
  • the adhesives achieve a high degree of compatible interfacial mixing with a thermoplastic substrate while molten, which upon cooling yields a high- strength bond.
  • the molten adhesives achieve a superior wetting out of the substrate surface, again yielding a high bond strength when cooled.
  • a particularly useful polyolefin is a propylene/ethylene copolymer having an ethylene content of up to about 10% by weight.
  • Suitable impact copolymers include impact copolymer based on polypropylene or on polyethylene, for example impact polypropylene copolymer containing an ethylene-propylene elastomeric phase.
  • the olefin resin is a blend of polyethylene and polypropylene.
  • the polyethylene is used in an amount of 5 to 30% by weight, more preferably of 10 to 25% by weight, based on the total weight of the blend and the polypropylene is used in an amount of 95 to 7 % by weight, more preferably in an amount of 90 to 75 % by weight, based on the total weight of the blend.
  • the heat-activatable adhesive resin preferably exhibits one of the features selected from a melting point of about 120 to about 170°C (preferably of about 130 to about 165°C), a melt flow index of about 2 to 18 g/10 min (preferably of about 5 to 9 g/10 min), a tensile strength at break of about 25 to about 45 N/cm 2 (preferably of about 30 to 40 N/cm 2 ), an e-modulus at 100% elongation of about 10 to about 20 N/cm 2 (preferably of about 12 to about 16 N/cm 2 ), and an elongation at break of about 200 to about 450% (preferably of about 230 to about 400%). More preferably, the heat-activatable adhesive resin exhibits at least two, more preferably at least three, and even more preferably all of the aforementioned features.
  • Suitable commercially available heat-activatable polyolefins include poylpropylene copolymers of the trade name FinaproTM, such as those of the designation FinaproTM 5660, FinaproTM 8780, FinaproTM 5642, and FinaproTM 5712 (available from ATOFINA Petrochemichals), ethylene/propylene copolymers of the trade name Eltex PTM, such as KS 414, KS 409, or KL 467 (available from Solvay Polymers), or those of the trade designation NovolenTM, such as MC 3200 (available from Targor GmbH, Ludwigshafen, Germany).
  • FinaproTM poylpropylene copolymers of the trade name FinaproTM, such as those of the designation FinaproTM 5660, FinaproTM 8780, FinaproTM 5642, and FinaproTM 5712 (available from ATOFINA Petrochemichals)
  • Eltex PTM such as KS 414, KS 409, or KL
  • the thickness of the heat-activatable adhesive layer when present is determined by the end-use of the adhesive tape typical thicknesses being in the range of about 30 to 300 ⁇ m.
  • the heat-activatable adhesive resin layer may also contain non-resinous ingredients, such as conventional additives.
  • additives may include fillers, pigments, dyes, crosslinking agents, viscosity adjusting agents, dispersants, extrusion aids and mixtures thereof.
  • the adhesive tapes for splicing in connection with this invention typically will include a release liner protecting the adhesive surface of the adhesive tapes.
  • Suitable release liners include those known in the art such as for example silicone based release liners.
  • the ends of the adhesive tape(s) are arranged opposite to each other while leaving a gap between them.
  • the size of this gap i.e. the distance between the ends of the adhesive tapes being spliced can vary widely but is generally between 0.1 and 5 mm, preferably between 0.2 and 2 mm.
  • the adhesive tapes are arranged on a temporary support or alternatively on a release liner so as to cover the gap on one major side.
  • the gap may then be filled with a liquid composition that can be hardened.
  • the liquid composition is a composition that can be hardened upon exposure to heat or to irradiation with light such as for example UV light or visible light.
  • the liquid composition may harden upon exposure to an electron beam radiation.
  • the liquid composition may harden as a result of a polymerization reaction occurring and/or a crosslinking or curing reaction.
  • the liquid composition will have a viscosity selected such that the gap can be readily filled although the viscosity should generally not be too low as this may cause the liquid to leak out of the gap before it can be hardened in the gap.
  • the viscosity should be between 1 000 and 20 000 mPa.s, preferably between 1 000 and 5 000 mPa.s.
  • the liquid composition will be of a similar or like nature as the adhesive tapes that are being spliced together as this will generally provide for a stronger bond between the respective ends of the adhesive tapes being spliced.
  • the adhesive tape comprises an acrylic pressure sensitive adhesive
  • it will generally be preferred to use a hardenable liquid that is based on acrylic monomers.
  • the liquid composition may comprise one or more mono-functional acrylic monomers described above in connection with acrylic pressure sensitive adhesives.
  • the liquid composition preferably also comprises one or more poly-functional monomers, i.e. cross-linkers as described above.
  • the composition should generally also include a photoinitiator as for example described above.
  • the liquid composition may have a composition such that when hardened, a pressure sensitive adhesive results but such is not required and the liquid composition may also be selected such and/or hardened to a level that the resulting hardened composition does not have adhesive characteristics.
  • the resulting hardened composition will not have adhesive characteristics.
  • the viscosity of the liquid composition may be adjusted by adding a thickening agent to the liquid composition such as for example an acrylic polymer or alternatively, the liquid may be exposed for a short time to irradiation or an electron beam so as to cause a slight polymerization or cross-linking for example up to a conversion level of not more than 20%, preferably not more than 10%.
  • a thickening agent such as for example an acrylic polymer
  • the liquid may be exposed for a short time to irradiation or an electron beam so as to cause a slight polymerization or cross-linking for example up to a conversion level of not more than 20%, preferably not more than 10%.
  • Alternative liquid compositions that can be used for splicing include curable epoxy resin compositions and cross-linkable polyurethane compositions. However, because of their potential sensitivity to hydrolysis, polyurethane compositions will not be preferred where the splice may be subjected to water or moisture as for example in car door seals.
  • the hardenable liquid composition will generally be free of or substantially free of solvents.
  • substantially free of is meant that the amount of solvents is generally not more than 10% by weight, preferably not mote than 5% by weight and most preferably not more than 1% by weight.
  • the adhesive tapes that are being spliced include release liners
  • the spliced adhesive tape can be used in sealing applications or can be used to adhere one article to another.
  • the spliced adhesive tape is used to adhere an article to a motor vehicle body, e.g. the body of a car, bus or truck.
  • articles that may be adhered to the body of a motor vehicle include for example emblems, side protection strips, interior panels and trim.
  • the spliced adhesive tape is used in a sealing application.
  • the spliced adhesive tape is particularly suitable for adhering a rubber gasket to the frame of a door or the frame of a door opening of a motor vehicle such as for example a car, bus or truck.
  • Particularly suitable spliced adhesive tapes for adhering a rubber gasket are adhesive tapes that comprise on one major side a pressure sensitive adhesive and on the opposite major side a heat-activatable adhesive such as for example a heat-activatable polyolefin resin.
  • the heat-activatable adhesive is typically used to adhere the adhesive tape to the rubber gasket and the pressure sensitive adhesive, e.g. an acrylic based one, is used to adhere to the frame of the door or door opening.
  • a 40 cm long section of 10 mm wide dual functional adhesive tape available as # 5402-F Tape from 3M Company (St. Paul, MN/USA) was cut cleanly into two 20 cm lengths using a razor blade.
  • This tape bore an acrylic-based pressure-sensitive adhesive (PSA) on one side and a heat-activated polyolefin film on the other side.
  • PSA pressure-sensitive adhesive
  • This tape is commonly used to adhere rubber door seals onto automobile doors.
  • the heat-activated side of the tape is heat-bonded to a rubber gasket and the pressure-sensitive adhesive side of the tape is bonded to the car door.
  • the pressure-sensitive adhesive side of the tape was protected by a polymeric film-based release liner.
  • the two adhesive tape sections to be spliced were arranged on the polyester support film so that PSA side of the adhesive tape was facing upwards.
  • An acrylic syrup comprising a mixture of polymer and monomer was prepared by first combining 87.5 parts by weight isooctyl acrylate (IOA), 12.5 parts by weight acrylic acid (AA), 0.25 parts by weight photoinitiator (2,2-dimethoxy-2-phenyl acetophenone, available as IRGACURETM 651 from Ciba-Geigy), 0.055 parts hexanedioldiacrylate (HDDA), 4.0 parts by weight hydrophobic fumed silica (available as AEROSILTM 972R from Degussa ) and 8 parts by weight hollow glass microspheres (available as K-15 3MTM ScotchliteTM glass bubbles from 3M Company).
  • IOA isooctyl acrylate
  • AA acrylic acid
  • HDDA 0.055 parts hexanedioldiacrylate
  • hydrophobic fumed silica available as AEROSILTM 972R from Degussa
  • the mixture thus prepared was polymerized in the absence of oxygen under UV lamps to a conversion of ca. 6 % by weight.
  • the acrylic syrup comprising a mixture of polymer and monomer had a Brookfield viscosity of approx. 400 mPa s measured according to ASTM D4016-02.
  • the construction thus prepared was placed under a UV lamp, commercially available as OSRAM Ultra Vita Lux, 0928, 230 V AC, 300W, for 1 minute.
  • the syrup was fully cured and converted to a pressure-sensitive adhesive mass.
  • Example 1 This spliced construction of Example 1 was subjected to a tensile and elongation test according to DIN (Deutsche Industrie Norm) 53455 using a commercially available tensile tester (Model. 1435 from ZWICK GmbH). Tests were conducted at a crosshead speed of 300 mm / min. Elongation at break was recorded in percent as well as tensile strength at break (N/mm 2 ). The adhesive tape broke in the tape itself and not in the splice area, indicating that that the splice area had more cohesive strength than the tape itself.
  • a rubber seal was fixed to a car door using dual functional adhesive tape # 5402-F which contained three splices of the type described in Example 1. Water was unable to penetrate the closed car door in areas where a tape splice was present.
  • Example 2 Two sections of 3M tape # 5402-F bearing release liner on the pressure-sensitive adhesive side were employed as in Example 1. The two tape ends were arranged in an abutting fashion with the tape ends touching one another.
  • the spliced liner was removed before testing the tape construction. It was found that the abutting tape ends had developed a light adhesion to one another due to their inherent pressure-sensitive adhesive character. This construction was also subjected to the tensile and elongation test as described above. Results showed that little stress could be tolerated by the adhesive bond formed between the two abutting ends of the adhesive tape.
  • Rubber seals were mounted on car doors using the tape of Comparative Example 1 that has been stored in a continuous roll, adhered to and supported by the spliced liner.
  • a long section of this dual functional adhesive tape bearing three sections where the two tape ends were lightly adhered together only by means of their inherent adhesive character, was used to put a rubber seal on a car door, the resulting seal in the door was not resistant to water penetration. Test results are summarized in Table 1.
  • This tape has pressure-sensitive adhesive character on both exposed surfaces
  • the two pieces of adhesive tape bearing liner were arranged in a centered fashion on top of a 4 cm long section of 10 mm wide polyester support film having a thickness of 110 ⁇ m in such a manner that the adhesive tape liner was facing downwards and was adjacent to the polyester support film.
  • the ends of the two adhesive tape pieces to be spliced together, respectively, were separated by a space of about 1-2 mm.
  • the two adhesive tapes were then secured to the polyester support film with a single-sided pressure-sensitive adhesive tape #851 splicing tape (from 3M Company, St. Paul, MN/USA).
  • Example 1 The acrylic syrup described in Example 1 was introduced onto the gap between the two tape ends and cured completely using UV radiation as described in Example 1.
  • Example 2 The splice of Example 2 was tested qualitatively by first removing the spliced construction from the polyester support film, grasping the each of the two adhesive tape pieces separately by the non-spliced ends and trying to pull the two tape pieces apart from one another. The adhesive tape ends were adhered strongly together and the spliced adhesive tape stretched before it broke. The splice remained in tact and the sample broke in the non-spliced area.
  • Example 2 was repeated with the exception that a different acrylic foam tape was spliced.
  • This tape was # 4222, a white acrylic foam tape having pressures-sensitive adhesive characteristics on both surfaces, having a width of 10 mm and a thickness of 0.8 mm, available from 3M Company, St. Paul MN/USA.
  • Example 3M tape employed Tape type Splice type Elongation at break, % Tensile strength at break, N/mm 2 Splice resistance to water penetration 1 5402 Dual functional UV curable Syrup 130 0.48 YES C1 5402 Dual functional Liner splice only None None NO 2 5385 PSA UV curable Syrup --- ---- YES 3 4222 PSA UV curable Syrup 300 0.50 YES

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  • Adhesives Or Adhesive Processes (AREA)
EP03078391A 2003-10-28 2003-10-28 Raccord pour une bande adhésive Withdrawn EP1528022A1 (fr)

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EP03078391A EP1528022A1 (fr) 2003-10-28 2003-10-28 Raccord pour une bande adhésive

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140251528A1 (en) * 2013-03-07 2014-09-11 Martin Automatic, Inc. Apparatus and methods for forming a butt splice on a running web
CN109790928A (zh) * 2016-10-13 2019-05-21 Cqlt萨固密技术有限公司 用于制备用于加工成密封件的条带材料的方法
CN119330136A (zh) * 2024-12-23 2025-01-21 山东华滋自动化技术股份有限公司 棉芯料带卧式不停机换料设备及其换料工艺

Citations (3)

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Publication number Priority date Publication date Assignee Title
US3834971A (en) * 1972-09-21 1974-09-10 Mobil Oil Corp Apparatus for butt welding thermoplastics sheets and films
EP0598265A1 (fr) * 1992-10-29 1994-05-25 Ykk Corporation Dispositif automatique de coupe, soudage et assemblage des extrémités d'articles en forme de ruban
EP0786409A1 (fr) * 1994-10-17 1997-07-30 Tetra Laval Holdings & Finance Sa Appareil d'assemblage de films

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834971A (en) * 1972-09-21 1974-09-10 Mobil Oil Corp Apparatus for butt welding thermoplastics sheets and films
EP0598265A1 (fr) * 1992-10-29 1994-05-25 Ykk Corporation Dispositif automatique de coupe, soudage et assemblage des extrémités d'articles en forme de ruban
EP0786409A1 (fr) * 1994-10-17 1997-07-30 Tetra Laval Holdings & Finance Sa Appareil d'assemblage de films

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140251528A1 (en) * 2013-03-07 2014-09-11 Martin Automatic, Inc. Apparatus and methods for forming a butt splice on a running web
US9469494B2 (en) * 2013-03-07 2016-10-18 Martin Automatic, Inc. Apparatus and methods for forming a butt splice on a running web
CN109790928A (zh) * 2016-10-13 2019-05-21 Cqlt萨固密技术有限公司 用于制备用于加工成密封件的条带材料的方法
CN119330136A (zh) * 2024-12-23 2025-01-21 山东华滋自动化技术股份有限公司 棉芯料带卧式不停机换料设备及其换料工艺

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