EP2431962A1 - Multi-layer loop tag with improved transportability - Google Patents
Multi-layer loop tag with improved transportability Download PDFInfo
- Publication number
- EP2431962A1 EP2431962A1 EP10009865A EP10009865A EP2431962A1 EP 2431962 A1 EP2431962 A1 EP 2431962A1 EP 10009865 A EP10009865 A EP 10009865A EP 10009865 A EP10009865 A EP 10009865A EP 2431962 A1 EP2431962 A1 EP 2431962A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- web
- loop tag
- tag
- self
- 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.)
- Granted
Links
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Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0288—Labels or tickets consisting of more than one part, e.g. with address of sender or other reference on separate section to main label; Multi-copy labels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/08—Fastening or securing by means not forming part of the material of the label itself
- G09F3/10—Fastening or securing by means not forming part of the material of the label itself by an adhesive layer
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
- A45C13/00—Details; Accessories
- A45C13/42—Devices for identifying luggage; Means for attaching same
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0201—Label sheets intended to be introduced in a printer, e.g. laser printer
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/023—Adhesive
- G09F2003/0241—Repositionable or pressure sensitive adhesive
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0254—Luggage tag
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0264—Shapes or borders
- G09F2003/0267—Shapes or borders die cut
Definitions
- the present invention relates to a multi-layer loop tag having the form of an elongated strip with predetermined and detachable multi-layer area(s), the areas being modified for improved transportability of the loop tag on airport check-in devices.
- the multi-layer tag can be used as a loop tag which can be wrapped round any object like an article, a handle or a packaging, followed by closing the loop by adhering two cold seal coating parts on the reverse side of the tag to each other. It is particularly useful for baggage tags applied at airports.
- EP2061018A1 discloses a multi-layer material which can be used for the manufacture of multi-layer loop tags.
- the multi-layer material comprises a self-adhesive layer coated on the reverse side of a first web, a release layer coated on the front side of a second web, the release layer being attached to the self-adhesive layer of the first web, wherein on the reverse side of the second web a cold seal adhesive layer is coated.
- tags are easy to handle for the user. Especially for self-check-in counters, which do become more and more popular at the airport, where passengers have to make their own check-in procedure these tags have advantages. However, it has come out that with some tag printers transportation problems arise. One of the problems observed is that tags may wind up arround the platen roller of the printer.
- a multi-layer loop tag having the form of an elongated strip comprising a release layer coated on the front side of a second web, and a cold seal adhesive layer coated on the reverse side of the second web, wherein the multi-layer loop tag further comprises a self-adhesive layer coated on the reverse side of a first web, the release layer is attached to the self-adhesive layer of the first web, and the first web and the self-adhesive layer are die-cut in a manner that a multi-layer area comprising part of the first web and part of the self-adhesive layer is predetermined and detachable from the multi-layer loop tag, characterized in that the predetermined multi-layer area does not comprise any part of both margin areas at the long sides of the strip wherein the margin areas are defined to have each a width of 1 to 10 mm, preferably 3 to 6 mm.
- the form of the multi-layer loop tag according to the invention is typically that the elongated strip has a length in the range of 30 to 80 cm, preferably 40 to 60 cm, and a width in the range of 4 to 7 cm, preferably of 5 to 6 cm. It is preferred that the elongated strip has a rectangular form or an essentially rectangular form, respectively, as can be seen in figures 4 to 7 . However, minor adaptations of the form at, e.g., the end sections of the strip are possible; see figures 6 and 7 . For example, at the end section(s) the width can be smaller ( figure 6 ) in order to facilitate the tear off of a strip from a roll of a perforated pre-form of the multi-layer loop tags.
- the multi-layer loop tag according to the invention Due to the well-defined margin areas the multi-layer loop tag according to the invention has an improved stiffness compared to the stiffness of the multi-layer loop tags of the prior art after bending several times in the die cutted area.
- This stiffness is achieved in that die-cuttings across the complete width of the elongated strip are avoided.
- the margin areas being completely non-die-cut on both sides of the strip and allow an improved stiffness of the multi-layer loop tag, and also of a perforated pre-form of multi-layer loop tags.
- the multi-layer loop tag according to the invention preferably has a minimum stiffness of more than 30 mN, preferably of more than 40 mN, most preferably of more than 50 mN, in the die cutted area determined according to modified ISO 2493 (see Examples section). "In the die cutted area” means here that the stiffness is measured at the location as described in the Examples section. The die cutted area lies, for example, within the so-called “additional stub" or the "claim tag” (see also firgures 4 to 8).
- the mentioned minimum stiffness should be present in at least one of the die cutted areas. However, it is preferred that the minimum stiffness is present in all of the die cutted areas of the loop tag.
- material die cutted according to the standard methods of the prior art normally gives stiffness values of only 10-30 mN. As a result the loop tags according to the present invention have improved runnabil-ity in bag tag printers.
- the front side of the first web can either be printable without any additional printable layer(s) or can be printable on one or more additional printable layer(s) coated on the first web. If present the one or more additional printable layer(s) are also die-cut together with the first web and the self-adhesive layer.
- Uncoated printable first webs can be selected for example from the group comprising cardboards, paper layers, paper laminates or even printable polymer films, e.g. Teslin.
- a printable layer can be coated on the first web in order to render the front side of the first web printable.
- Examples for the above-mentioned additional printable layer(s) are heat sensitive recording layers, inkjet receiving layers, thermal transfer receiving layers, offset printing layers, flexographic printing layers or laser recording layers.
- Heat sensitive papers are commercially available and widely used for label, tag and ticket applications as well as other applications. Generally, these papers can comprise pre-coatings, top-coatings and back-coatings additionally to the heat sensitive layer. Preferably, top-coatings with release properties are used in this invention and more preferably zinc stearate is used as release agent in this coating.
- the technology of heat sensitive (thermal) papers is described in the literature, e.g. in US 5,811,368 and references cited therein.
- the front side of the first web or, if present, the additional printable layer can have release properties or can be coated with a release layer. If present the release layer is also die-cut together with the first web, the self-adhesive layer and, if present, the one or more additional printable layer(s). Release properties or a release layer is useful to make sure that no sticking problems occur when the multi-layer material or tag is wound-up into reels.
- the cold seal adhesive layer coated on the reverse side of the second web preferably is based on mixtures of natural or synthetic latex dispersions and one or more of the dispersions selected from the group comprising an aqueous polyacrylic dispersion, a poly(meth)acrylate dispersion, an acrylate and/or methacrylate based copolymer dispersion.
- a typical example is a cold seal adhesive composition containing 40-65 % by weight, preferably 50-60 % by weight, of a natural latex emulsion, preferably with an ammonia content giving pH values of appr.
- the cold seal adhesive layer typically has a dry coating weight in the range of 2 to 25 g/m 2 , preferably in the range of 5 to 15 g/m 2 .
- the peel strength of the cold seal adhesive layer measured with reference to FTM1 3 minutes after contacting two surfaces of the cold seal adhesive layer to each other is typically at least 4 N/25 mm, preferably at least 6 N/25 mm. This is generally necessary to achieve a permanent bond which is not destroyed in the application, e.g. during transport. This may be important for many applications as tags must survive until the final destination, e.g. of an airline baggage or an article, is reached. Most preferably the cold seal adhesive bond is so strong that the webs are ruptured. This is particularly the case if a paper layer is coated with the cold seal adhesive.
- the cold seal adhesive layer may completely or only partially be disposed on the reverse side of the second web of the multi-layer material or tag.
- a partially disposure is particularly advantageous to reduce cost or to avoid contact of the cold seal layer to the object in the final application.
- the cold seal layer is applied in stripes, most preferably in the web direction of the both flexible webs. Nevertheless, any useful pattern of the cold seal adhesive may be chosen depending on the application. As the cold seal adhesive is only used in the areas which are contacted to each other in the final application only these areas need to have the adhesive.
- the cold seal adhesive is applied with conventional coating techniques like roller coating, meyer bar, die systems or rotogravure.
- conventional coating techniques like roller coating, meyer bar, die systems or rotogravure.
- the die system or rotogravure technique is preferred.
- the front side of the first web or, respectively, the additional printable layer has release properties or is coated with a release layer.
- release properties or the release layer prevents the front side of the multi-layer material or tag to stick too tight to the cold seal adhesive layer at the opposite side of the multi-layer material or tag in case the material or tag is rolled up.
- the release layer prevents blocking during unwinding of the material or tag from a reel or roll.
- the optional release layer may be prepared by applying a composition comprising an organic antiblocking agent selected from polyamides, amide waxes, montan waxes, polyolefin waxes, ester waxes, calcium stearate, zinc stearate, polyvinyl esters, polyacrylate copolymers, fatty acid esters, long chain alkyl products, polysaccharides, polysiloxanes and mixtures thereof.
- an organic antiblocking agent selected from polyamides, amide waxes, montan waxes, polyolefin waxes, ester waxes, calcium stearate, zinc stearate, polyvinyl esters, polyacrylate copolymers, fatty acid esters, long chain alkyl products, polysaccharides, polysiloxanes and mixtures thereof.
- the release force of detaching the cold seal adhesive layer during unwinding a reel of the inventive multi-layer material measured according to FTM3 is preferably max. 250 N/50mm, more preferably max. 200 N/50mm, and most preferably is below 100 N/50mm.
- the release layer is preferably a coating based on a composition comprising an antiblocking agent or the release properties are based on a composition comprising an antiblocking agent
- the antiblocking agent can be selected from polyamides, amide waxes, montan waxes, polyolefin waxes, ester waxes, calcium stearate, zinc stearate, polyvinyl esters, polyacrylate copolymers, fatty acid esters, long chain alkyl products, polysaccharides, polysiloxanes and mixtures thereof.
- the self-adhesive layer on the reverse side of the first web is a permanent or removable pressure sensitive adhesive layer. Due to the release coating on top of the second web the pressure sensitive adhesive can be removed without any residues.
- the release layer typically comprised a polysiloxane compound and can be adjusted to the required release forces. Release forces are measured according to FTM 3 (FINAT Test Method 3; FINAT, The Hague Netherlands, is a well known organisation that promotes the interests of the self-adhesive labelling industry) and are preferably between 10 cN/50mm and 300 cN/50mm.
- a typical pressure sensitive adhesive system used is based on acrylic or vinylacetate polymers or copolymers and/or mixtures thereof. It can be either solvent or water based.
- hot melt pressure sensitive adhesives may be used, e.g. on basis of thermoplastic elastomers or UV curing acrylics.
- the adhesive layer of the above types typically has a dry coating weight in the range of 3 to 50 g/m 2 , preferably 10-25 g/m 2 .
- the peel adhesion on glass according to FTM1 (FINAT Test Method 1; FINAT, The Hague Netherlands, is a well known organisation that promotes the interests of the self-adhesive labelling industry) after 20 min is typically between 10 N/25mm to 30 N/25mm for permanent pressure sensitive adhesives and 0,2 N/25mm to 10 N/25mm for removable pressure sensitive adhesives.
- the shear resistance on stainless steel according to FTM8 (FINAT Test Method 8) is above 600 minutes, preferably above 800 minutes.
- the pressure sensitive adhesive coating is done with conventional coating techniques: e.g. for dispersion or solvent based systems coating techniques like meyer bar, roller coating, rotogravure, curtain coating or die coating techniques are used. For hot melt based systems roller coating, curtain coating or die systems are suitable.
- the multi-layer material or tag includes a RFID (radio frequency identification device).
- the RFID is implemented either directly or on the adhesive or coating layer on the front side or the reverse side of either the first web or the second web.
- RFIDs comprises chip and antenna for responding to an electromagnetic high frequency detection signal. Active and passive devices may be used. They can be incorporated into the multi-layer material or the multi-layer tag made from that material by known lamination techniques, e.g. by adhering the pre-manufactured RFID to one of the surfaces of the 2 webs by means of an adhesive.
- first web and/or the second web may be individually selected from the group comprising cardboards, paper layers, polymer films, metallized and/or fiber reinforced layers, metallized polymer films, non-woven fleece webs, metal foils and two ply or three ply laminates of any of the foregoing materials or mixtures thereof.
- first web and/or the second web is/are individually a 2-ply paper/film or a 3-ply paper/film/paper laminate.
- the polymer films are selected to yield high mechanical strength of the inventive multi-layer material or tag.
- the tensile strength of the multi-layer material or tag, if a polymer film is used, according to ISO1924 is typically in the range of 40 to 3000 N/15mm, preferably above 100 N/15mm, more preferably above 170 N/15mm. If biaxially oriented polymer films are used a high initial tear strength is achieved while tear propagation might be low. With uniaxially oriented polymer films high tear strength is achieved only in the cross direction to the orientation. Non-oriented polymer films are useful for both good initial tear resistance as well as good propagation tear.
- the multi-layered material or tag if a polymer film is used, preferably has a tear resistance according to ASTM-D1004 of above 25 N, preferably above 30 N.
- the polymer films can be treated inline in the lamination process by a corona discharge, a flame treatment or a chemical etching pretreatment, e.g. by a Fluor treatment, or by primer coating on one or both sides of the polymer film prior to adhesive coating.
- This pre-treatment is able to increase the surface tension and leads to improved wetting and adhesion of the water based film forming adhesive. It is commonly not necessary for already treated films.
- the first (2) and/or second (4) web is a polymer film.
- These polymer films can be water permeable or water impermeable, however, preferred are water impermeable polymer films.
- the water impermeable polymer films are typically made of polyolefine, e.g. polyethylene, polypropylene, or polyester, e.g. polyethylenetherephthalate, polyurethane, polyacrylate, polycarbonate, polyvinylchloride or polyamide, polyimide, polystyrene, cellulose acetates, biodegradable films (e.g. corn-starch or polyaminoacids based).
- These polymer film(s) are either non-oriented, unidirectionally oriented or biaxially oriented.
- films examples are Mylar and Melinex biaxially oriented polyester film of DuPontTeijin, Valeron® polyethylene film, cast polypropylene films, monoaxially oriented polypropylene films or biaxially oriented polypropylene films (BOPP).
- the polymer films can also be a semipermeable film, so that water or solvent permeability is restricted, e.g. a film with small holes or a porous film.
- a semipermeable film so that water or solvent permeability is restricted, e.g. a film with small holes or a porous film.
- the polymer films itselves have a thickness in the range of 3 ⁇ m to 250 ⁇ m, preferably 9 ⁇ m to 70 ⁇ m, more preferably 12 ⁇ m to 50 ⁇ m. Thinner webs might be mechanically too weak. Thick webs up to 250 ⁇ m have still enough flexibility for the intended use.
- the first web of the multi-layer loop tag according to the invention is preferably a cardboard or paper layer, more preferably having a weight of 30 to 250 g/m 2 , even more preferably a weight of 50 to 150 g/m 2 or a polymeric film, preferably with a thickness in the range of 3 ⁇ m to 250 ⁇ m, more preferably in the range of 9 ⁇ m to 70 ⁇ m.
- a multi-layer material according to the present invention different paper grades can be used for web 1, and web 2, respectively.
- the first web of the multi-layer material or tag may be any of the above described materials, but preferably the first web is a cardboard or a paper layer, preferably having a weight of 30 to 250 g/m 2 , more preferred of 50 to 150 g/m or a polymeric film, preferably with a thickness in the range of 3 to 250 ⁇ m, more preferably in the range of 9 ⁇ m to 70 ⁇ m, while as the second web a glassine or a clay-coated paper, preferably having a weight of 40 to 100 g/m 2 , more preferably a weight of 50 to 80 g/m 2 , or a polymeric film, preferably based on polyethylene, polypropylene, polyester or starch, may be used, preferably with a thickness of 3 ⁇ m to 250 ⁇ m, and more preferably 9 ⁇ m to 70 ⁇ m.
- the tear resistance of the multi-layer material is above 25 N, preferably above 30 N, and the tensile strength is in the range of 40 to 3000 N/15mm, preferably above 100 N/15mm, more preferably above 170 N/15mm, under the proviso that the multi-layer material comprises at least one polymeric film either as the first web and/or the second web and/or as part of the 2-ply or the 3-ply laminate.
- the first and/or the second web is a 2-ply or 3-ply laminate comprising one or more polymer film(s) and one or more paper layer(s), wherein the polymer film(s) and the paper layer(s) being in an alternating manner permanently attached to each other by a film forming adhesive.
- the 2-ply or 3-ply laminate may be a transparent laminate. Such 2-ply or 3-ply laminates are described in detail in EP 1 586447 A1 .
- the laminate is a 3-ply laminate having two paper layers on the outside and one polymer film as a centre layer of the laminate.
- the determination of the stiffness follows the procedure described in ISO2493 with the following amendments.
- the cut test pieces are 54 mm wide and 90 mm long.
- test piece is clamped outside the die cutted area and 1 mm away from the die cut line perpendicular to the longside of the test piece, i.e. the edge of the clamp is located at either dotted line A or B in figures 4 to 8 .
- the test piece is cut from the roll of the tag material in manner that the "free length" is 41 mm ⁇ 1 mm.
- the bending length is 10 mm.
- the force is applied 9 mm away from the die cut line inside the die cutted area.
- the type of instrument used is a tester of the company Lorentzen & Wettre, Sweden.
- a multi layer tag material with the following dimensions was produced:
- the multi layer tag material used has the following product structure:
- Table 1 Stiffness of a baggage tag with standard die cutting Area of measurement Stiffness [mN] according to modified ISO2493 Non-die cutted area (in the middle between dotted line A and B in figure 8 ) 118-125 Die cutted area at claim tag 20-29 Die cutted area at additional stub 15-30
- the Stiffness in the die cutted area was measured 9 mm adjacent to the die cutted line.
- a multi layer tag material with the following dimensions was produced:
- the multi layer tag material used had the same product structure as described in example 1 .
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Abstract
the multi-layer loop tag further comprises a self-adhesive layer (1) coated on the reverse side of a first web (2),
the release layer (3) is attached to the self-adhesive layer (1) of the first web (2), and
the first web (2) and the self-adhesive layer (1) are die-cut in a manner that a multi-layer area comprising part of the first web (2) and part of the self-adhesive layer (1) is predetermined and detachable from the multi-layer loop tag, characterized in that
the predetermined multi-layer area does not comprise any part of both margin areas (11 ) at the long sides of the strip wherein the margin areas (11) are defined to have each a width of 1 to 10 mm, preferably 3 to 6 mm.
Description
- The present invention relates to a multi-layer loop tag having the form of an elongated strip with predetermined and detachable multi-layer area(s), the areas being modified for improved transportability of the loop tag on airport check-in devices. The multi-layer tag can be used as a loop tag which can be wrapped round any object like an article, a handle or a packaging, followed by closing the loop by adhering two cold seal coating parts on the reverse side of the tag to each other. It is particularly useful for baggage tags applied at airports.
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EP2061018A1 discloses a multi-layer material which can be used for the manufacture of multi-layer loop tags. The multi-layer material comprises a self-adhesive layer coated on the reverse side of a first web, a release layer coated on the front side of a second web, the release layer being attached to the self-adhesive layer of the first web, wherein on the reverse side of the second web a cold seal adhesive layer is coated. - The above described multi-layer loop tags are easy to handle for the user. Especially for self-check-in counters, which do become more and more popular at the airport, where passengers have to make their own check-in procedure these tags have advantages. However, it has come out that with some tag printers transportation problems arise. One of the problems observed is that tags may wind up arround the platen roller of the printer.
- These problems may arise for the following reasons: Before starting printing the tag needs to be drawn-in in the printer. In order to realise that printing can start at the beginning of the tag the tag is then pulled out again of the printer for a short length with the function "backfeed before print". This drawn-in/pull-out-process is a stress to the tag sheet which is comparable to a bending stress to the material. The drawn-in/pull-out-process requires a certain stiffness of the tag material. Howerver, due to the die cutted areas of the tag the stiffnes of the material is reduced which may lead to transportation problems in the printer: The additional stub could turn round, could then adhere to the reverse side of the tag. This could lead to a complete tag being wound up on the platen roller. As a result the tags are not useful for the passanger. Furthermore, service to the printer will become necessary thereby causing loss of time and costs.
- Therefore, it is an object of the present invention to provide a multi-layer loop tag of the above described type which has improved transportation/feeding properties in several common baggage tag printers.
- The above object is met by a multi-layer loop tag having the form of an elongated strip comprising a release layer coated on the front side of a second web, and a cold seal adhesive layer coated on the reverse side of the second web, wherein the multi-layer loop tag further comprises a self-adhesive layer coated on the reverse side of a first web, the release layer is attached to the self-adhesive layer of the first web, and the first web and the self-adhesive layer are die-cut in a manner that a multi-layer area comprising part of the first web and part of the self-adhesive layer is predetermined and detachable from the multi-layer loop tag, characterized in that the predetermined multi-layer area does not comprise any part of both margin areas at the long sides of the strip wherein the margin areas are defined to have each a width of 1 to 10 mm, preferably 3 to 6 mm.
- The form of the multi-layer loop tag according to the invention is typically that the elongated strip has a length in the range of 30 to 80 cm, preferably 40 to 60 cm, and a width in the range of 4 to 7 cm, preferably of 5 to 6 cm. It is preferred that the elongated strip has a rectangular form or an essentially rectangular form, respectively, as can be seen in
figures 4 to 7 . However, minor adaptations of the form at, e.g., the end sections of the strip are possible; seefigures 6 and 7 . For example, at the end section(s) the width can be smaller (figure 6 ) in order to facilitate the tear off of a strip from a roll of a perforated pre-form of the multi-layer loop tags. - Due to the well-defined margin areas the multi-layer loop tag according to the invention has an improved stiffness compared to the stiffness of the multi-layer loop tags of the prior art after bending several times in the die cutted area.
- This stiffness is achieved in that die-cuttings across the complete width of the elongated strip are avoided. The margin areas being completely non-die-cut on both sides of the strip and allow an improved stiffness of the multi-layer loop tag, and also of a perforated pre-form of multi-layer loop tags.
- The multi-layer loop tag according to the invention preferably has a minimum stiffness of more than 30 mN, preferably of more than 40 mN, most preferably of more than 50 mN, in the die cutted area determined according to modified ISO 2493 (see Examples section). "In the die cutted area" means here that the stiffness is measured at the location as described in the Examples section. The die cutted area lies, for example, within the so-called "additional stub" or the "claim tag" (see also firgures 4 to 8).
- In case of more than one die cutted areas the mentioned minimum stiffness should be present in at least one of the die cutted areas. However, it is preferred that the minimum stiffness is present in all of the die cutted areas of the loop tag. In contrast to loop tags according to the present invention material die cutted according to the standard methods of the prior art normally gives stiffness values of only 10-30 mN. As a result the loop tags according to the present invention have improved runnabil-ity in bag tag printers.
- The front side of the first web can either be printable without any additional printable layer(s) or can be printable on one or more additional printable layer(s) coated on the first web. If present the one or more additional printable layer(s) are also die-cut together with the first web and the self-adhesive layer.
- Uncoated printable first webs can be selected for example from the group comprising cardboards, paper layers, paper laminates or even printable polymer films, e.g. Teslin. Alternatively, a printable layer can be coated on the first web in order to render the front side of the first web printable.
- Examples for the above-mentioned additional printable layer(s) are heat sensitive recording layers, inkjet receiving layers, thermal transfer receiving layers, offset printing layers, flexographic printing layers or laser recording layers.
- Heat sensitive papers are commercially available and widely used for label, tag and ticket applications as well as other applications. Generally, these papers can comprise pre-coatings, top-coatings and back-coatings additionally to the heat sensitive layer. Preferably, top-coatings with release properties are used in this invention and more preferably zinc stearate is used as release agent in this coating. The technology of heat sensitive (thermal) papers is described in the literature, e.g. in
US 5,811,368 and references cited therein. - In the multi-layer loop tag according to the invention the front side of the first web or, if present, the additional printable layer can have release properties or can be coated with a release layer. If present the release layer is also die-cut together with the first web, the self-adhesive layer and, if present, the one or more additional printable layer(s). Release properties or a release layer is useful to make sure that no sticking problems occur when the multi-layer material or tag is wound-up into reels.
- The cold seal adhesive layer coated on the reverse side of the second web preferably is based on mixtures of natural or synthetic latex dispersions and one or more of the dispersions selected from the group comprising an aqueous polyacrylic dispersion, a poly(meth)acrylate dispersion, an acrylate and/or methacrylate based copolymer dispersion. A typical example is a cold seal adhesive composition containing 40-65 % by weight, preferably 50-60 % by weight, of a natural latex emulsion, preferably with an ammonia content giving pH values of appr. 10, 20-50 % by weight, preferably 30-40 % by weight of a styrene-acrylate emulsion, and small (1-5% by weight) amounts of wetting agents, latex stabilizers, antioxidants, biocides, thickeners, and optionally tackifiers. Some examples of cold seal adhesives based on natural latex emulsion and aqueous polyacrylate dispersions are described in
US-A 5,070,164 ,US-A 4,898,787 andUS-A 4,888,395 . - The cold seal adhesive layer typically has a dry coating weight in the range of 2 to 25 g/m2, preferably in the range of 5 to 15 g/m2.
- The peel strength of the cold seal adhesive layer measured with reference to
FTM1 3 minutes after contacting two surfaces of the cold seal adhesive layer to each other is typically at least 4 N/25 mm, preferably at least 6 N/25 mm. This is generally necessary to achieve a permanent bond which is not destroyed in the application, e.g. during transport. This may be important for many applications as tags must survive until the final destination, e.g. of an airline baggage or an article, is reached. Most preferably the cold seal adhesive bond is so strong that the webs are ruptured. This is particularly the case if a paper layer is coated with the cold seal adhesive. - The cold seal adhesive layer may completely or only partially be disposed on the reverse side of the second web of the multi-layer material or tag. A partially disposure is particularly advantageous to reduce cost or to avoid contact of the cold seal layer to the object in the final application. Preferably the cold seal layer is applied in stripes, most preferably in the web direction of the both flexible webs. Nevertheless, any useful pattern of the cold seal adhesive may be chosen depending on the application. As the cold seal adhesive is only used in the areas which are contacted to each other in the final application only these areas need to have the adhesive.
- The cold seal adhesive is applied with conventional coating techniques like roller coating, meyer bar, die systems or rotogravure. For the partial coating, the die system or rotogravure technique is preferred.
- Furthermore, the front side of the first web or, respectively, the additional printable layer has release properties or is coated with a release layer. These release properties or the release layer, respectively, prevents the front side of the multi-layer material or tag to stick too tight to the cold seal adhesive layer at the opposite side of the multi-layer material or tag in case the material or tag is rolled up. In other words, the release layer prevents blocking during unwinding of the material or tag from a reel or roll. The optional release layer may be prepared by applying a composition comprising an organic antiblocking agent selected from polyamides, amide waxes, montan waxes, polyolefin waxes, ester waxes, calcium stearate, zinc stearate, polyvinyl esters, polyacrylate copolymers, fatty acid esters, long chain alkyl products, polysaccharides, polysiloxanes and mixtures thereof.
- The release force of detaching the cold seal adhesive layer during unwinding a reel of the inventive multi-layer material measured according to FTM3 is preferably max. 250 N/50mm, more preferably max. 200 N/50mm, and most preferably is below 100 N/50mm.
- The release layer is preferably a coating based on a composition comprising an antiblocking agent or the release properties are based on a composition comprising an antiblocking agent, the antiblocking agent can be selected from polyamides, amide waxes, montan waxes, polyolefin waxes, ester waxes, calcium stearate, zinc stearate, polyvinyl esters, polyacrylate copolymers, fatty acid esters, long chain alkyl products, polysaccharides, polysiloxanes and mixtures thereof.
- The self-adhesive layer on the reverse side of the first web is a permanent or removable pressure sensitive adhesive layer. Due to the release coating on top of the second web the pressure sensitive adhesive can be removed without any residues. The release layer typically comprised a polysiloxane compound and can be adjusted to the required release forces. Release forces are measured according to FTM 3 (
FINAT Test Method 3; FINAT, The Hague Netherlands, is a well known organisation that promotes the interests of the self-adhesive labelling industry) and are preferably between 10 cN/50mm and 300 cN/50mm. A typical pressure sensitive adhesive system used is based on acrylic or vinylacetate polymers or copolymers and/or mixtures thereof. It can be either solvent or water based. Alternatively, hot melt pressure sensitive adhesives may be used, e.g. on basis of thermoplastic elastomers or UV curing acrylics. The adhesive layer of the above types typically has a dry coating weight in the range of 3 to 50 g/m2, preferably 10-25 g/m2. - The peel adhesion on glass according to FTM1 (
FINAT Test Method 1; FINAT, The Hague Netherlands, is a well known organisation that promotes the interests of the self-adhesive labelling industry) after 20 min is typically between 10 N/25mm to 30 N/25mm for permanent pressure sensitive adhesives and 0,2 N/25mm to 10 N/25mm for removable pressure sensitive adhesives. The shear resistance on stainless steel according to FTM8 (FINAT Test Method 8) is above 600 minutes, preferably above 800 minutes. - The pressure sensitive adhesive coating is done with conventional coating techniques: e.g. for dispersion or solvent based systems coating techniques like meyer bar, roller coating, rotogravure, curtain coating or die coating techniques are used. For hot melt based systems roller coating, curtain coating or die systems are suitable.
- In another special embodiment of the invention the multi-layer material or tag includes a RFID (radio frequency identification device). According to this embodiment the RFID is implemented either directly or on the adhesive or coating layer on the front side or the reverse side of either the first web or the second web. RFIDs comprises chip and antenna for responding to an electromagnetic high frequency detection signal. Active and passive devices may be used. They can be incorporated into the multi-layer material or the multi-layer tag made from that material by known lamination techniques, e.g. by adhering the pre-manufactured RFID to one of the surfaces of the 2 webs by means of an adhesive.
- In general, the first web and/or the second web may be individually selected from the group comprising cardboards, paper layers, polymer films, metallized and/or fiber reinforced layers, metallized polymer films, non-woven fleece webs, metal foils and two ply or three ply laminates of any of the foregoing materials or mixtures thereof. In a preferred embodiment of the invention the first web and/or the second web is/are individually a 2-ply paper/film or a 3-ply paper/film/paper laminate.
- Generally, the polymer films are selected to yield high mechanical strength of the inventive multi-layer material or tag. The tensile strength of the multi-layer material or tag, if a polymer film is used, according to ISO1924 is typically in the range of 40 to 3000 N/15mm, preferably above 100 N/15mm, more preferably above 170 N/15mm. If biaxially oriented polymer films are used a high initial tear strength is achieved while tear propagation might be low. With uniaxially oriented polymer films high tear strength is achieved only in the cross direction to the orientation. Non-oriented polymer films are useful for both good initial tear resistance as well as good propagation tear.
- The multi-layered material or tag, if a polymer film is used, preferably has a tear resistance according to ASTM-D1004 of above 25 N, preferably above 30 N.
- The polymer films can be treated inline in the lamination process by a corona discharge, a flame treatment or a chemical etching pretreatment, e.g. by a Fluor treatment, or by primer coating on one or both sides of the polymer film prior to adhesive coating. This pre-treatment is able to increase the surface tension and leads to improved wetting and adhesion of the water based film forming adhesive. It is commonly not necessary for already treated films. Polyolefine films, particularly polypropylene films, however, are critical to adhere and preferably are treated to ensure perfect bonding of the adhesive. For further details it is referred to
EP 1 586 447 A1 - In certain embodiments of the invention the first (2) and/or second (4) web is a polymer film. These polymer films can be water permeable or water impermeable, however, preferred are water impermeable polymer films. The water impermeable polymer films are typically made of polyolefine, e.g. polyethylene, polypropylene, or polyester, e.g. polyethylenetherephthalate, polyurethane, polyacrylate, polycarbonate, polyvinylchloride or polyamide, polyimide, polystyrene, cellulose acetates, biodegradable films (e.g. corn-starch or polyaminoacids based). These polymer film(s) are either non-oriented, unidirectionally oriented or biaxially oriented. Examples for these films are Mylar and Melinex biaxially oriented polyester film of DuPontTeijin, Valeron® polyethylene film, cast polypropylene films, monoaxially oriented polypropylene films or biaxially oriented polypropylene films (BOPP).
- Furthermore, the polymer films can also be a semipermeable film, so that water or solvent permeability is restricted, e.g. a film with small holes or a porous film. For further details it is referred to
EP 1 586 447 A1 - The polymer films itselves have a thickness in the range of 3 µm to 250 µm, preferably 9 µm to 70 µm, more preferably 12 µm to 50 µm. Thinner webs might be mechanically too weak. Thick webs up to 250 µm have still enough flexibility for the intended use.
- The first web of the multi-layer loop tag according to the invention is preferably a cardboard or paper layer, more preferably having a weight of 30 to 250 g/m2, even more preferably a weight of 50 to 150 g/m2 or a polymeric film, preferably with a thickness in the range of 3 µm to 250 µm, more preferably in the range of 9 µm to 70 µm. For the production of a multi-layer material according to the present invention different paper grades can be used for
web 1, andweb 2, respectively. - In a preferred embodiment of the invention the first web of the multi-layer material or tag may be any of the above described materials, but preferably the first web is a cardboard or a paper layer, preferably having a weight of 30 to 250 g/m2, more preferred of 50 to 150 g/m or a polymeric film, preferably with a thickness in the range of 3 to 250 µm, more preferably in the range of 9 µm to 70 µm, while as the second web a glassine or a clay-coated paper, preferably having a weight of 40 to 100 g/m2, more preferably a weight of 50 to 80 g/m2, or a polymeric film, preferably based on polyethylene, polypropylene, polyester or starch, may be used, preferably with a thickness of 3 µm to 250 µm, and more preferably 9 µm to 70 µm.
- Additionally, or in another preferred embodiment of the invention the tear resistance of the multi-layer material is above 25 N, preferably above 30 N, and the tensile strength is in the range of 40 to 3000 N/15mm, preferably above 100 N/15mm, more preferably above 170 N/15mm, under the proviso that the multi-layer material comprises at least one polymeric film either as the first web and/or the second web and/or as part of the 2-ply or the 3-ply laminate.
- In certain embodiments of the invention the first and/or the second web, preferably the second web, is a 2-ply or 3-ply laminate comprising one or more polymer film(s) and one or more paper layer(s), wherein the polymer film(s) and the paper layer(s) being in an alternating manner permanently attached to each other by a film forming adhesive. The 2-ply or 3-ply laminate may be a transparent laminate. Such 2-ply or 3-ply laminates are described in detail in
EP 1 586447 A1 - Preferably, the laminate is a 3-ply laminate having two paper layers on the outside and one polymer film as a centre layer of the laminate.
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Figure 1 shows the assembly of a multi-layer loop tag according to the invention wherein a self-adhesive layer (1) coated on the reverse side of a first web (2), a release layer (3) coated on the front side of a second web (4), the release layer being attached to the self-adhesive layer (1) of the first web (2), wherein on the reverse side of the second web (4) a cold seal adhesive layer (5) is coated. -
Figure 2 shows another embodiment of the multi-layer loop tag according to the invention. Therein a printable layer (6) coated with a release layer (7) is added to the front side of the first web (2) of the multi-layer material according tofigure 1 . -
Figure 3 shows a further embodiment of the inventive multi-layer loop tag wherein the material corresponds to the material shown infigure 2 but the second web (4) is a 3-ply laminate (4). -
Figure 4 shows a top view of the multi-layer loop tag according to the invention having the form of an elongated strip (8) and having detachable predetermined areas (9) and (10) on the printable side of the strip which does not comprise any part of both margin areas at the long sides of the strip (11). Furthermore recognition bars (12) which are widely used in airline baggage tags and which can be colourful are shown on the multi-layer loop tag. - The determination of the stiffness follows the procedure described in ISO2493 with the following amendments. The cut test pieces are 54 mm wide and 90 mm long.
- The test piece is clamped outside the die cutted area and 1 mm away from the die cut line perpendicular to the longside of the test piece, i.e. the edge of the clamp is located at either dotted line A or B in
figures 4 to 8 . The test piece is cut from the roll of the tag material in manner that the "free length" is 41 mm ±1 mm. The bending length is 10 mm. As a result, the force is applied 9 mm away from the die cut line inside the die cutted area.The type of instrument used is a tester of the company Lorentzen & Wettre, Sweden. - A multi layer tag material with the following dimensions was produced:
- Tag length: 539,75 mm; Tag width: 54 mm
- At the one end of the tag two self adhesive labels - the so called "additional stubs" - were produced with the dimensions, length 15 mm, width 54 mm each, by die cutting through the first web and the self adhesive layer coated on the reverse side of the first web. At the one end of the tag, one self adhesive label - the so called "claim tag" - is die cutted in the same manner with the dimensions: 70 mm length, width 54 mm.
- Between the additional stubs and the claim tag green stripes with the dimensions length 90 mm,
width 5 mm were printed on both sides of the tag. This is done as an identification mark for baggage tags applied in the European Union. - The multi layer tag material used has the following product structure:
- An 80 g/m2 top coated thermal paper was laminated to a siliconised 50 µm opaque biaxially stretched polypropylene film by means of a permanent hot melt based pressure sensitive adhesive in the first step. The coating weight of the pressure sensitive adhesive is 18-20 g/m2. In the second step the reverse side of the siliconised film is corona treated and the cold seal adhesive is coated with a dry coating weight of 8-10 g/m2. Due to the release properties of the top coat layer of the thermal paper, consisting among others of zinc stearate, the material can be wound up into reels and rewound without any blocking problems. The release force between the self adhesive coating of the thermal paper (web1) and the siliconised film (web2) is 50-200 cN/50mm measured according to FTM3. The release force between the cold seal coating of the reverse side of the siliconised film (web 2) and the release coating of the thermal paper (web1) is 10-60 cN/50mm according to FTM3.
- The stiffness of this multi layer tag material die cutted as described above has been measured in die cutted and non-die cutted areas. The results are shown in Table 1.
Table 1: Stiffness of a baggage tag with standard die cutting Area of measurement Stiffness [mN]
according to modified ISO2493Non-die cutted area (in the middle between dotted line A and B in figure 8 )118-125 Die cutted area at claim tag 20-29 Die cutted area at additional stub 15-30 - Remark: The Stiffness in the die cutted area was measured 9 mm adjacent to the die cutted line.
- Printing tests were done on Intermec 201 bag tag printers. At the beginning of the test the tag printing worked out quite properly. However, when starting the printing process after a period of appr. 2 hours of non printing, tags were wound around the platen roller of the printer quite often leading to printer maintenance.
- A multi layer tag material with the following dimensions was produced:
- Tag length: 539,75 mm; Tag width: 54 mm
- At the one end of the tag two self adhesive labels - the so called "additional stubs" - were produced with the dimensions, length 15 mm, width 54 mm each, by die cutting through the first web and the self adhesive layer coated on the reverse side of the first web. At the one end of the tag, one self adhesive label - the so called "claim tag" - is die cutted in the same manner with the dimensions: 70 mm length, width 46 mm. At the longsides of the die cutted labels margin areas were left with a width of 4 mm each on both sides
- Between the additional stubs and the claim tag green stripes with the dimensions length 90 mm,
width 5 mm were printed on both sides of the tag. This is done as an identification mark for baggage tags out of the European Union. - The multi layer tag material used, had the same product structure as described in example 1 .
- The stiffness of this multi layer tag material die cutted as described above was measured in die cutted and non die cutted areas
Table 2: Stiffness of a baggage tag with inventive die cutting Area of measurement Stiffness [mN]
according to modified ISO2493Non-die cutted area (in the middle between dotted line A and B in figures 5-7 )100-110 Die cutted area claim tag 70-100 Die cutted area additional stub 50-100 - Printing tests were done on Intermec 201 bag tag printers. Even after starting the printing process after a period of 2-4 hours and even overnight tags could be printed without any disturbances.
-
- (1)
- self-adhesive layer
- (2)
- first web
- (3)
- release layer
- (4)
- second web
- (5)
- cold seal adhesive layer
- (6)
- additional printable layer
- (7)
- release layer
- (8)
- elongated strip
- (9)
- claim tag
- (10)
- additional stub
- (11)
- margin area at the long sides of the strip
- (12)
- recognition bar
Claims (9)
- A multi-layer loop tag having the form of an elongated strip comprising a release layer (3) coated on the front side of a second web (4), and a cold seal adhesive layer (5) coated on the reverse side of the second web (4), wherein
the multi-layer loop tag further comprises a self-adhesive layer (1) coated on the reverse side of a first web (2),
the release layer (3) is attached to the self-adhesive layer (1) of the first web (2), and
the first web (2) and the self-adhesive layer (1) are die-cut in a manner that a multi-layer area comprising part of the first web (2) and part of the self-adhesive layer (1) is predetermined and detachable from the multi-layer loop tag, characterized in that
the predetermined multi-layer area does not comprise any part of both margin areas (11) at the long sides of the strip wherein the margin areas (11) are defined to have each a width of 1 to 10 mm, preferably 3 to 6 mm. - The multi-layer loop tag according to claim 1, wherein the front side of the first web (2) is either printable without any additional printable layer(s) or is printable on one or more additional printable layer(s) (6) coated on the first web (2) and, if present, wherein the one or more additional printable layer(s) (6) are also die-cut together with the first web (2) and the self-adhesive layer (1).
- The multi-layer loop tag according to any of the preceding claims, wherein the front side of the first web (2) or, if present, the additional printable layer (6) has release properties or is coated with a release layer (7) and, if present, wherein the release layer (7) is also die-cut together with the first web (2), the self-adhesive layer (1) and, if present, the one or more additional printable layer(s) (6).
- The multi-layer loop tag according to any of the preceding claims, wherein the elongated strip has a length in the range of 30 to 80 cm, preferably 40 to 60 cm, and a width in the range of 4 to 7 cm, preferably of 5 to 6 cm.
- The multi-layer loop tag according to any of the preceding claims, wherein the loop tag has a stiffness of more than 30 mN, preferably of more than 40 mN, in the die cutted area determined according to modified ISO 2493.
- The multi-layer loop tag according to any of the preceding claims, wherein the first web (2) and/or the second web (4) is/are individually selected from the group comprising cardboards, paper layers, polymer films, metallised and/or fiber reinforced layers, metallised polymer films, non-woven fleece webs, metal foils and two ply or three ply laminates of any of the foregoing materials or mixtures thereof.
- The multi-layer loop tag according to claim 11, wherein the first web (2) and/or the second web (4) is/are individually a 2-ply paper/film or a 3-ply paper/film/paper laminate.
- The multi-layer loop tag according to any of the preceding claims, wherein the first web (2) is a cardboard or paper layer, preferably having a weight of 30 to 250 g/m2, more preferably a weight of 50 to 150 g/m2 or a polymeric film, preferably with a thickness in the range of 3 µm to 250 µm, more preferably in the range of 9 µm to 70 µm.
- The multi-layer loop tag according to any of the preceding claims, wherein the second web (4) is a glassine or clay-coated paper, preferably having a weight of 40 g/m2 to100 g/m2, more preferably a weight of 50 g/m2 to 80 g/m2, or a polymeric film, preferably based on polyethylene, polypropylene, polyester or starch with a thickness of 3 µm to 250 µm, preferably 9 µm to 70 µm.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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ES10009865T ES2425774T3 (en) | 2010-09-17 | 2010-09-17 | Multilayer loop label with enhanced transport capacity |
EP20100009865 EP2431962B1 (en) | 2010-09-17 | 2010-09-17 | Multi-layer loop tag with improved transportability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP20100009865 EP2431962B1 (en) | 2010-09-17 | 2010-09-17 | Multi-layer loop tag with improved transportability |
Publications (2)
Publication Number | Publication Date |
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EP2431962A1 true EP2431962A1 (en) | 2012-03-21 |
EP2431962B1 EP2431962B1 (en) | 2013-07-10 |
Family
ID=43558241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20100009865 Active EP2431962B1 (en) | 2010-09-17 | 2010-09-17 | Multi-layer loop tag with improved transportability |
Country Status (2)
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EP (1) | EP2431962B1 (en) |
ES (1) | ES2425774T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2709042A1 (en) * | 2012-09-17 | 2014-03-19 | Sihl GmbH | Multilayer RFID loop tag comprising cold seal adhesive layers |
WO2018132001A1 (en) | 2017-01-10 | 2018-07-19 | Sl Patent B.V. | Flexible tamperproof suitcase locker |
WO2019190315A1 (en) | 2018-03-26 | 2019-10-03 | Sl Patent B.V. | Improved flexible digitally printable and tamperproof suitcase locker |
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US4888395A (en) | 1987-07-02 | 1989-12-19 | Mobil Oil Corporation | Core/shell polymers and improved sealable articles treated with the same |
US4898787A (en) | 1987-07-02 | 1990-02-06 | Mobil Oil Corporation | Emulsion polymerized cohesive polymer latex useful as cold seal coating and improved sealable articles treated with the same |
US5070164A (en) | 1987-07-02 | 1991-12-03 | Mobil Oil Corporation | Cold sealable cohesive terpolymers |
WO1996015746A1 (en) * | 1994-11-23 | 1996-05-30 | Avery Dennison Corporation | Enhanced laser label assemblies |
US5811368A (en) | 1995-12-08 | 1998-09-22 | Nippon Paper Industries Co., Ltd. | Thermal sensitive recording medium |
US6686014B1 (en) * | 2001-05-02 | 2004-02-03 | The Standard Register Company | Reduction of adhesive ooze by pattern overcoating |
EP1586447A1 (en) | 2004-04-15 | 2005-10-19 | Sihl GmbH | New laminating process and laminates resulting thereof |
US20060110565A1 (en) * | 2002-08-16 | 2006-05-25 | Avery Dennison Corporation | Send-reply label |
EP2061018A1 (en) | 2007-10-12 | 2009-05-20 | Sihl GmbH | Multi-layer material comprising self-adhesive and cold seal coatings |
-
2010
- 2010-09-17 EP EP20100009865 patent/EP2431962B1/en active Active
- 2010-09-17 ES ES10009865T patent/ES2425774T3/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US4888395A (en) | 1987-07-02 | 1989-12-19 | Mobil Oil Corporation | Core/shell polymers and improved sealable articles treated with the same |
US4898787A (en) | 1987-07-02 | 1990-02-06 | Mobil Oil Corporation | Emulsion polymerized cohesive polymer latex useful as cold seal coating and improved sealable articles treated with the same |
US5070164A (en) | 1987-07-02 | 1991-12-03 | Mobil Oil Corporation | Cold sealable cohesive terpolymers |
WO1996015746A1 (en) * | 1994-11-23 | 1996-05-30 | Avery Dennison Corporation | Enhanced laser label assemblies |
US5811368A (en) | 1995-12-08 | 1998-09-22 | Nippon Paper Industries Co., Ltd. | Thermal sensitive recording medium |
US6686014B1 (en) * | 2001-05-02 | 2004-02-03 | The Standard Register Company | Reduction of adhesive ooze by pattern overcoating |
US20060110565A1 (en) * | 2002-08-16 | 2006-05-25 | Avery Dennison Corporation | Send-reply label |
EP1586447A1 (en) | 2004-04-15 | 2005-10-19 | Sihl GmbH | New laminating process and laminates resulting thereof |
EP2061018A1 (en) | 2007-10-12 | 2009-05-20 | Sihl GmbH | Multi-layer material comprising self-adhesive and cold seal coatings |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2709042A1 (en) * | 2012-09-17 | 2014-03-19 | Sihl GmbH | Multilayer RFID loop tag comprising cold seal adhesive layers |
WO2018132001A1 (en) | 2017-01-10 | 2018-07-19 | Sl Patent B.V. | Flexible tamperproof suitcase locker |
NL2018149B1 (en) * | 2017-01-10 | 2018-07-25 | Bvdb Holding B V | Flexible tamperproof suitcase locker |
WO2019190315A1 (en) | 2018-03-26 | 2019-10-03 | Sl Patent B.V. | Improved flexible digitally printable and tamperproof suitcase locker |
Also Published As
Publication number | Publication date |
---|---|
EP2431962B1 (en) | 2013-07-10 |
ES2425774T3 (en) | 2013-10-17 |
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