Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1995-12-13
1998-01-27
Yoder, Michele K.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156310, 156DIG36, 428347, 40630, B32B 3126
Patent
active
057118361
DESCRIPTION:
BRIEF SUMMARY
SUMMARY OF THE INVENTION
This invention provides a method of marking an object, comprising indicia applied to an indicia-receiving coating of curable material carried on one of its main surfaces and having a pressure sensitive adhesive (preferably acrylic) coating provided on part of the sheet, pressure-sensitive adhesive into adherent contact with part of the indicia-receiving coating and with another part of the sheet, thus securing the sheet around the object, coating, indicia-receiving coating, thereby bonding the sheet to itself in the area of adherent contact.
Preferably the sheet is wrapped so as to bring the indicia-receiving coating into overlap contact with the opposite main surface of the sheet. The indicia may be applied to the sheet by any appropriate method of printing, marking, laminating, transferring or other means.
Preferably the indicia-receiving coating is initially porous, preferably being of particulate and/or filamentary curable material.
The pressure-sensitive adhesive is provided on top of the indicia receiving coating or on the other part of the sheet which is brought into contact therewith, and preferably the pressure-sensitive adhesive is capable of reacting with the curing indicia-receiving coating material. When preferred materials are selected, the curing produces a bond of at least 25% (preferably at least 35%, more preferably at least 45% or at least 50%) greater strength (FINAT Test Method No. 1) than the pressure-sensitive adhesive bond prior to the curing. This may particularly be found when an indicia-receiving coating comprising epoxy material interacts with an acrylic polymer pressure-sensitive adhesive. It may be especially useful if the pressure-sensitive adhesive coating is on the main sheet surface remote from the indicia and also serves to adhere the sheet to the object.
The curable material preferably cures on heating by reaction of a plurality of reactive components which exist separately from one another in the form of filaments and/or parades. Preferably a component of the curable material comprises an epoxy material, and preferably another component of the curable material comprises a material having free amine groups. Alternatively, the curable material may be curable by irradiation, e.g. with U.V. light.
The indicia may be "fixable" in the sense that suitable treatment, by heating or U.V. irradiation for example, develops their final colour or causes them to adhere more strongly to the sheet. However, the indicia are preferably "fixable" by virtue of curing of the aforementioned indicia-receiving coating to which they are preferably applied.
In all cases, it is advantageous for the indicia to be fixable by the same treatment as is used to cure the indicia-receiving coating, preferably in a single operation.
The indicia may be applied, or added to, by any suitable methods, for example ink Jet printing after wrapping of the sheet around the object, but it will often be more convenient to apply all of the desired indicia before the wrapping step.
Any flexible sheet, e.g. a polymer film or laminate of polyester or polyamide, may be used which is capable of receiving and retaining the coating(s) and indicia, and any suitable curable materials and indicia-forming materials may be used, for example heat-curable epoxy systems or U.V. curable acrylics.
Preferred forms of marker for use in the method of this invention are described in EP-A-0237258 (RK297COM), the sheet and coating materials naturally being selected from those described to provide sufficient flexibility for wrapping around the object to be marked. The curable material (at least in the bonding area) is cured after wrapping of the marker around the object, as distinct from the prior curing of the markable surface to make the indelible labels described in EP-A-0237258. The ingenious use of the pressure-sensitive adhesive coating, which may be present on the reverse side of the known labels, to hold the bond contact prior to curing (the pressure-sensitive adhesive preferably reacting with the bond coati
REFERENCES:
patent: 2873564 (1959-02-01), Bogeskov
patent: 2975091 (1961-03-01), Tobey
patent: 3819434 (1974-06-01), Dembiak et al.
patent: 4465717 (1984-08-01), Crofts et al.
patent: 4643786 (1987-02-01), Cecchi
patent: 4906695 (1990-03-01), Blizzard et al.
patent: 5273798 (1993-12-01), Miner
patent: 5593759 (1997-01-01), Vargas et al.
Burkard Herbert G.
Novack Sheri M.
Raychem Limited
Yoder Michele K.
LandOfFree
Method of marking an object does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of marking an object, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of marking an object will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-338933