JPH10274933A - Method for producing adhesive sheet for printing and label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To print on an adhesive layer and to easily adhere to an adherend via the adhesive layer, and to provide a cover with a substrate at the same time as the adhesive treatment, so that scratch resistance is improved. To obtain an adhesive sheet for printing that can easily and easily issue excellent labels. An ink sheet having a sublimable dye-containing ink layer (2) on a thermally conductive substrate (1) and an ink-permeable release surface layer (3) on the ink layer. (4) an adhesive sheet for printing having a label sheet (7) in which an adhesive layer (5) is adhered to one surface of a transparent substrate (6) via the adhesive layer, on the release surface layer; Production of a label that prints information consisting of a sublimable dye-containing ink on the adhesive layer by heating a predetermined portion of the adhesive sheet for use from the heat conductive substrate side via a thermal head, and then separates the ink sheet from the adhesive layer Method. [Effect] A transparent label that can use the ground color of the adherend as the background color is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive sheet for printing, which can be printed on an adhesive layer, and can be printed on the spot, etc., on the spot or the like, so that a transparent label excellent in abrasion resistance can be adhered to an adherend through the adhesive layer.

[0002]

2. Description of the Related Art Conventionally, as an adhesive sheet for printing for thermal transfer, an adhesive layer is provided on one side of a film substrate, and the adhesive layer is covered with a separator and housed in a thermal transfer printer in a wound state. There has been known a printer in which printing is performed on the back surface of a film substrate via an ink ribbon attached to a printer.

[0003] However, when the separator is peeled off from the label obtained by the above-mentioned method and adhered to the adherend via the adhesive layer, the back surface of the film substrate, which is the printing surface, is exposed to the surface, and the printing disappears due to rubbing or the like. There was a problem that it was easy to perform and poor scratch resistance. Labels for nameplates and the like are strongly required to have abrasion resistance, and if they are insufficient, they are not suitable for practical use. For this reason, a method of adhesively covering the printed back surface of the film base with an adhesive tape has been adopted, but the covering process requires a long time,
There was a drawback that required a lot of effort.

[0004]

The present invention can print on an adhesive layer and can easily adhere to an adherend via the adhesive layer.
It is an object of the present invention to provide a printing adhesive sheet which can provide a cover having a base material at the same time as the adhesive treatment and can easily issue a label having excellent scratch resistance.

[0005]

The present invention provides an ink sheet having a sublimable dye-containing ink layer on a thermally conductive substrate and an ink-permeable release surface layer on the ink layer. An adhesive sheet for printing, characterized in that the surface layer has a label sheet having an adhesive layer adhered to one side of a transparent substrate through the adhesive layer, and a heat conductive substrate side in the adhesive sheet for printing. A method for producing a label, comprising heating a predetermined portion via a thermal head, printing information comprising a sublimable dye-containing ink on an adhesive layer, and then separating the ink sheet from the adhesive layer. It is.

[0006]

According to the adhesive sheet for printing of the present invention, the adhesive layer can be printed with the ink of the ink layer by heating from the heat conductive base material side through a heat source such as a thermal head. The ink sheet can be separated and adhered to the adherend with its protective layer covered with a transparent substrate through the adhesive layer, and the ink information is not easily lost due to rubbing or wiping with a solvent, and the abrasion resistance A label excellent in quality can be easily obtained.

Further, it is possible to obtain a transparent label in which the label sheet has transparency and the background color of the adherend can be used as a background color. Further, according to the method of the present invention, a label having arbitrary ink information can be issued on a spot or the like occasionally.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The adhesive sheet for printing of the present invention has a sublimable dye-containing ink layer on a heat conductive substrate and an ink-permeable release surface layer on the ink layer. A label sheet having an adhesive layer adhered to one side of a transparent substrate is provided on the release surface layer of the ink sheet via the adhesive layer. An example is shown in FIG. Reference numeral 4 denotes an ink sheet including the heat conductive substrate 1, the ink layer 2, and the release surface layer 3, and reference numeral 7 denotes a label sheet including the adhesive layer 5 and the transparent substrate 6.

[0009] As the heat conductive substrate, an appropriate material capable of transmitting heat from a thermal head, a heat stamp, or the like to the ink layer can be used. In particular, a thin and excellent toughness is preferable. Generally, a metal foil or a plastic film is used. There is no particular limitation on the type of the plastic, for example, polyolefins such as polyethylene and polypropylene, polyamides and polyesters,
Polyvinyl acetate, ethylene / vinyl acetate copolymer, urethane polymer and acrylic polymer such as poly (meth) acrylate, polyvinyl chloride and styrene polymer, silicone polymer and natural rubber, polyisobutylene and polyisoprene , Chloroprene rubber, isoprene / isobutylene rubber, nitrile butyl rubber, styrene / butadiene rubber, styrene / butadiene / styrene rubber, styrene / isoprene / styrene rubber, styrene / ethylene / butadiene rubber, styrene / ethylene / butylene / styrene rubber, styrene / isoprene・
Plastics containing a rubber-based polymer such as propylene-styrene rubber and ethylene-propylene terpolymer, and blends thereof are exemplified.

[0010] The thickness of the heat conductive substrate may be appropriately determined according to the strength and the like. 30 μm or less, especially 1 to 20 μm, from the viewpoint of forming a fine pattern by good heat conduction.
A thickness of μm, especially 3 to 10 μm, is preferred. In the case of a plastic film, a polyethylene terephthalate film or the like is preferable from the viewpoint of strength and heat resistance. Further, a known heat-resistant lubricating layer such as a conventional ink ribbon may be provided on the surface of the heat conductive substrate opposite to the side where the ink layer is provided, for the purpose of improving running properties and the like.

The ink layer can be formed as a conventional sublimation-type heat-fixable ink obtained by blending a sublimable dye with a binder made of a polymer, wax, or the like. It can be formed by holding the material by an appropriate method such as an application method or an impregnation method. The thickness of the ink layer is 20 μm or less, especially 0.1
The thickness is generally 15 μm, particularly 0.5 to 10 μm, but is not limited thereto.

The purpose of the release surface layer is to reduce the adhesive strength between the adhesive layer and the ink sheet so that the ink sheet and the label sheet can be easily peeled off. The ink is permeable so that it can be printed on. Such ink permeability is, for example, a porous or mesh-like release surface layer or a thin layer, especially 1 μm or less, particularly 0.01 μm or less.
It can be achieved by a release surface layer having a thickness of 0.5 μm or the like.

The release surface layer can be formed by, for example, a method of coating a silicone-based, long-chain alkyl-based, fluorine-based, or other pressure-sensitive adhesive sheet with an appropriate known release agent. Above all, a release coat composed of a cured film of a silicone resin is preferred from the viewpoint of releasability and the like. In addition, the adhesive force with the adhesive layer is 180 degree peel value (peeling speed 300 mm
/ Min), 500g / 50mm or less, especially 5-30
A release surface layer of 0 g / 50 mm, particularly 10 to 150 g / 50 mm or less is preferable from the viewpoint of workability of separating the ink sheet and the label sheet.

The label sheet of the present invention can be obtained as one having an adhesive layer adhered to one surface of a transparent substrate. As the transparent substrate, an appropriate material having a light transmittance can be used. Generally, a transparent film made of a plastic or the like exemplified as the above-described heat conductive substrate is used. The thickness of the transparent substrate is generally 500 μm or less, preferably 1 to 300 μm, particularly 10 to 100 μm, but is not limited to this, and may be appropriately determined according to the purpose of use of the label.

The transparent base material may contain appropriate additives such as a reinforcing material and an antioxidant as long as the light transmittance is maintained. As the reinforcing material, an appropriate material such as a film, a fiber, a cloth, or a nonwoven fabric can be used for the purpose of improving the strength of the transparent substrate. The physical properties of the label sheet or the label can be easily controlled by selecting the reinforcing material. For example, heat resistance can be improved by using a reinforcing material made of a heat-resistant resin such as polyester, polyimide, fluororesin or polyamide.

The formation of the transparent base material having the reinforcing material is performed by attaching the reinforcing material on the transparent base material by an appropriate method such as a heat laminating method or an extrusion coating method. It can be performed by an appropriate method such as a method of impregnating a transparent base material. Note that a transparent substrate having excellent flexibility is preferable from the viewpoint of the winding property and the curved surface adhesion.

The adhesive layer provided on one side of the transparent substrate is used to adhere to an adherend when a label or the like is used.
In the present invention, it also functions as a layer to be printed. The adhesive layer can be formed with an appropriate adhesive such as a hot-melt type adhesive layer, but a pressure-sensitive adhesive can be preferably used from the viewpoint of easy adhesion.

Examples of the pressure-sensitive adhesive include rubber-based, acrylic-based, silicone-based and vinylalkylether-based, polyvinyl alcohol-based and polyvinylpyrrolidone-based, polyacrylamide-based and cellulose-based, urethane-based and polyester-based, and polyamide-based adhesives. Any suitable one such as can be used. Above all, a polyester-based pressure-sensitive adhesive is preferred from the viewpoint of the sharpness of printing and the like. The adhesive layer can be formed using one or more adhesives.

The adhesive layer may be formed by applying a suitable adhesive such as a rolling method such as a calender roll method or a coating method such as a doctor blade method or a gravure roll coater method on a transparent substrate. It can be performed by an appropriate method. In the case of a pressure-sensitive adhesive, it can be provided by a method in which an adhesive layer provided on a separator is transferred onto a transparent substrate. The thickness of the adhesive layer is 500 μm or less, preferably 0.5 to
The thickness is generally 100 μm, particularly 2 to 50 μm, but is not limited thereto.

The adhesive layer, in particular, the adhesive layer made of a pressure-sensitive adhesive, is composed of two or more layers made of the same or different kinds of adhesives as shown in FIG. 2 for the purpose of achieving both good printability and adhesive strength. Can be formed as a superimposed layer of the adhesive layers 51 and 52. In this case, the adhesive layer 52 provided inside is controlled to be at normal temperature, from the viewpoint of preventing outflow (protruding) due to tightening in the case of a wound body or improving the adhesive strength to the adherend.
And the complex rigidity at a frequency of 1 Hz is 10 ⁴ to 10 ⁷ dyne /
Preferably, the adhesive layer has a size of cm ² .

For forming the internal adhesive layer, any of the above-mentioned suitable adhesives can be used, and an adhesive exhibiting strong adhesive strength can be preferably used. The thickness of the internal adhesive layer can be appropriately determined according to the necessary adhesive strength depending on the purpose of use of the label. Generally, the thickness is 1 to 500 μm, especially 100 μm or less, particularly 20 to 50 μm.

The adhesive sheet for printing according to the present invention can print the ink of the ink layer on the adhesive layer by heating from the heat conductive substrate side through an appropriate heat source such as a thermal head or a heat stamp. It is. It is preferable to use a thermal transfer printer or the like that prints via a thermal head, rather than giving arbitrary ink information at the site or the like and issuing a label on the occasion. In this case, since the adhesive sheet for printing has an ink layer in the present invention, it is not necessary to use a separate ink ribbon.

FIG. 3 illustrates a method for producing a label using the adhesive sheet for printing of the present invention. According to this, the printing adhesive sheet 8 is rewound from the winding body 9 via the rewinding mechanism 30 including the pinch rolls 31 and 32 using a pair of embossing rolls, and is introduced into the printing mechanism unit 10. A predetermined portion is heated on the roll 12 via the thermal head 11 from the heat conductive substrate 1 side of the unwound printing adhesive sheet portion based on the print data to remove the ink of the ink layer 2 from the release surface layer 3. After the ink information is printed on the adhesive layer 5 through the transmission, the ink sheet 4 and the label sheet 7 are separated to obtain the label 80. By forming the printing adhesive sheet into a roll-shaped wound body as described above, a long printing adhesive sheet can be stored in the printer in a compact state.

In the above, the method of obtaining the label 80 in a state where the ink sheet 4 and the label sheet 7 are separated has been exemplified.
In the present invention, after printing according to the above as exemplified in FIG. 4, the ink sheet 4 and the label sheet 7 in the printing adhesive sheet portion after the printing are cut through the cutting mechanism 40 without being separated, The label can also be manufactured using a printer that discharges the label 81 in the state of the printing adhesive sheet 8 after the print processing.

In the above case, since the adhesive layer 5 is protected by the ink sheet 4, the label adhesive layer may be contaminated until the ink sheet is peeled off and adhered to the adherend. There are advantages that can be prevented. Further, since there is no need to provide an ink sheet collecting mechanism in the printer, there is an advantage that the structure of the printer can be simplified.

On the other hand, as shown in FIG. 5, in the present invention, a label can be obtained with the ink sheet 4 and the label sheet 7 separated in advance by providing an ink sheet collecting mechanism in the printer. In the example of FIG. 5, after printing according to the above, the ink sheet 4 in the printing adhesive sheet portion after the printing is separated from the label sheet 7 via the collection mechanism 50 including the guide roll 51 and the take-up reel 52. The label 82 in the state of the printed label sheet 7 is obtained by using a printer that cuts out and collects and then discharges the label 82 by cutting through the cutting mechanism 40.

In the above case, a label in which the adhesive layer is exposed and can be directly adhered to the adherend is obtained. Therefore, the obtained label is directly adhered to the label via a known automatic adhesion mechanism using a labeler or the like. It can be bonded to the body and is suitable for luggage transportation systems that require management.

In the above embodiment, the pinch roll type rewinding mechanism 30 is shown. In the present invention, the rewinding is performed by compactly storing the printing adhesive sheet as a wound body and rewinding it. Since it is intended to smoothly feed forward and introduce it to the printing mechanism etc.
An appropriate mechanism other than the pinch roll type such as a belt conveyor type can be used instead. Further, a plurality of rewinding mechanisms may be arranged at appropriate positions, for example, near the rear part of the wound body 9 or at the front part of the cutting mechanism 40.

On the other hand, as the cutting mechanism 40,
The cutting blade 41 that intermittently moves up and down as shown by an arrow through a driving source (not shown) in conjunction with the printing mechanism 10 to cut the printing adhesive sheet or label sheet after ink information has been applied that has reached the top of the printing sheet 10. Although illustrated, in the present invention, the cutting mechanism is:
An appropriate mechanism for cutting the printing adhesive sheet or the like into predetermined dimensions can be provided.

In the present invention, the ink information to be provided to the adhesive layer of the adhesive sheet for printing via the above-described printing mechanism section includes:
For example, it can be formed of arbitrary characters, figures, symbols, and the like such as a print pattern, a picture pattern, and a barcode pattern. Therefore, an appropriate information label such as an identification label can be formed, and a single item or a certain number of labels can be issued on the spot or the like via a printer. Note that it is preferable that the ink information is provided to the adhesive layer in a state of being inverted mirror-symmetrically from the viewpoint of recognizability.

The printing adhesive sheet may be preliminarily subjected to a printing process such as a fixed format, a logo mark, a fixed character, a ground pattern, or the like which is not required to be provided on the spot or the like at the spot. The printing process can be performed on an appropriate surface such as the front and back surfaces of the transparent substrate, but the surface of the transparent substrate on which the adhesive layer is provided is more preferable than the scratch resistance of the print information.

The printer for carrying out the label manufacturing method of the present invention is capable of suppressing contamination of the surface of the transparent base material and the adhesive layer due to contamination of the printing adhesive sheet or the transport path of the label sheet due to exposure in the air. Preferably it is covered by a housing. Especially, rolls of adhesive sheets for printing,
It is preferable that 90% or more of the total transport path length of the rewind portion or the label sheet portion and the label obtained by cutting it is covered with the housing. In addition, the area of the opening of the housing such as the label outlet and the cooling ventilation hole is 20%.
The following is preferred.

The countermeasure for preventing the surface of the transparent substrate from being contaminated by exposure in the air is to measure the length of time before the printing adhesive sheet is unwound from the wound body and cut, that is, the printing adhesive sheet is wound from the wound body. It is also possible to shorten the unwinding length of the sheet or the label sheet, for example, to a method of reducing the length of the wound body of the initial length to 10 or less or 5 or less.

As shown in FIG. 5, when the ink sheet 4 is peeled off in the printer to expose the adhesive layer 5 of the label sheet 7, especially the adhesive layer made of a pressure-sensitive adhesive, for example, as shown in FIG. Upper roll 3 of the rewinding mechanism 30 at
As shown in 1, the surface of the transport section or the label outlet which comes into contact with the adhesive layer is treated to reduce the adhesive strength, and particularly, the adhesive strength with the adhesive layer is 30.
The treatment is preferably performed so as to be 0 gf / 50 mm or less, particularly 150 gf / 50 mm or less.

The above-mentioned treatment for lowering the adhesive strength can be carried out by an appropriate method such as using a roll made of polyolefin or silicone resin, or coating or baking with polyolefin, silicone or fluororesin. When a part such as a transport path contacts the adhesive layer,
From the viewpoint of smoothness of conveyance and the like, it is preferable to be formed movably with a roll, a belt or the like. In addition, when the ink sheet is peeled off, static electricity may be generated, and the label sheet may become charged and dust or the like may be easily attached. Therefore, it is preferable that the label sheet is brought into contact with a metal roll or plate to remove the electricity.

In the above description, when a label having an exposed adhesive layer is obtained by previously peeling off the ink sheet in the printer (FIG. 5), it has been described that the label can be directly adhered to a target adherend. In the present invention, instead of the direct bonding method, a method of temporarily placing a label at an appropriate position such as a cradle of a cutting mechanism, and then bonding the label to a target adherend again via an automatic bonding mechanism or the like. You can also. When the adhesive layer is made of a pressure-sensitive adhesive, a temporary placement method by temporary attachment via the adhesive layer may be employed.

In the above-mentioned temporary placing method, a system for stopping the next printing until the temporarily placed label is removed, and further, when the temporarily placed label is removed, the next printing is automatically started to form the label. This system can be used as a system that automatically performs everything from the formation of a label to the process of bonding it to an adherend, to prevent labels from sticking to each other and to prevent sheet clogging at the label exit, as well as the same label or serial number. It is possible to efficiently perform the work of bonding an adherend such as a label without error.

In the automatic system described above, for example, a through-hole is provided in a pedestal of a cutting mechanism, and a sensor of an infrared type or the like is arranged on the back surface thereof. Sends a signal to the control unit of the body rewinding mechanism and printing mechanism, stops the next printing while there is a label,
When the label is removed, a signal may be sent to the control unit to restart printing and rewinding of the wound body.

[0039]

【Example】

Example 1 Sublimable dye (Kayaset Blue FR, manufactured by Nippon Kayaku Co., Ltd.) 2
An ink obtained by mixing 0 parts by weight and 80 parts by weight of a polyester resin (manufactured by Toyobo Co., Ltd.) having a glass transition temperature of about 70 ° C. with a mixed solvent of MEK and toluene was applied to one surface of a polyethylene terephthalate film having a thickness of 6 μm and a thickness of 1 μm. Was formed, and a release surface layer having a thickness of about 0.1 μm, which was formed of an ultraviolet-cured film of a silicone resin (X-62-7223 manufactured by Shin-Etsu Chemical Co., Ltd.), was provided thereon to obtain an ink sheet.

On the other hand, a toluene solution of an acrylic pressure-sensitive adhesive having a glass transition temperature of about -60 ° C. was uniformly applied to one surface of a transparent film made of polyethylene terephthalate having a thickness of 38 μm by a doctor blade method. After forming an adhesive layer of 15 μm to obtain a label sheet, the adhesive sheet for printing is laminated via the adhesive layer on the release surface layer of the ink sheet to obtain a printing adhesive sheet, which is wound to obtain a roll. Was.

Example 2 A label sheet was obtained using a polyester-based pressure-sensitive adhesive obtained by mixing 100 parts of a polyester with 3 parts of a urethane-based crosslinking agent in place of the acrylic pressure-sensitive adhesive. A roll of an adhesive sheet for printing was obtained according to the procedure.

Evaluation Test The wound body obtained in Examples 1 and 2 was mounted on a printer equipped with a thin film type line thermal head having a heating resistor density of 8 dots / mm, and an applied power of 0.4 W / dot was applied. A bar code was printed with a pulse width of 5 milliseconds to obtain a label, and the printability was examined.

As described above, it was possible to obtain a label having a clear bar code pattern on the adhesive layer and excellent in legibility from the transparent film side on the surface, and exhibited good printability.

The ink sheet was peeled off from the label, adhered to the aluminum plate through the adhesive layer, and erased 50 times with a plastic eraser from the transparent film side of the surface. Excellent scratch resistance. The same was true when a sand eraser was used instead of the plastic eraser.

Further, the adhesive label was wiped 50 times from the transparent film side of the surface of the adhesive label with a cloth impregnated with a solvent composed of ethanol, MEK, or gasoline. There was no disappearance and the scratch resistance was excellent.

[Brief description of the drawings]

FIG. 1 is a sectional view of an example of an adhesive sheet for printing.

FIG. 2 is a cross-sectional view of another example of an adhesive sheet for printing.

FIG. 3 is an explanatory diagram of a label manufacturing method.

FIG. 4 is an explanatory diagram of another label manufacturing method.

FIG. 5 is an explanatory view of still another label manufacturing method.

[Explanation of Signs] 8: Adhesive sheet for printing 4: Ink sheet 1: Thermal conductive substrate 2: Ink layer 3: Release surface layer 7: Label sheet 5: Adhesive layer 6: Transparent substrate 9: Rolled body 10 : Printing mechanism 30: rewinding mechanism 40: cutting mechanism 80, 81, 82: label 21: ink information

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Itsuro Takenoshita 1-2-1, Shimohozumi, Ibaraki-shi, Osaka Nitto Denko Corporation

Claims (10)

[Claims] 1. An ink sheet having a sublimable dye-containing ink layer on a thermally conductive substrate and an ink-permeable release surface layer on the ink layer, wherein a transparent layer is provided on the release surface layer. An adhesive sheet for printing, comprising a label sheet having an adhesive layer adhered to one surface of a substrate via the adhesive layer. 2. The printing adhesive sheet according to claim 1, wherein the adhesive layer comprises a pressure-sensitive adhesive. 3. The printing adhesive sheet according to claim 2, wherein the adhesive layer comprises a single layer of the polyester-based pressure-sensitive adhesive or a multilayer including the polyester-based pressure-sensitive adhesive layer. 4. The adhesive sheet for printing according to claim 1, wherein the thermally conductive substrate is a polyethylene terephthalate film having a thickness of 3 to 10 μm. 5. The adhesive sheet for printing according to claim 1, wherein the heat conductive substrate has a heat-resistant lubricating layer on the surface opposite to the side on which the ink layer is provided. 6. The printing adhesive sheet according to claim 1, wherein the thickness of the release surface layer is 0.5 μm or less. 7. The printing adhesive sheet according to claim 1, wherein the release surface layer comprises a cured film of a silicone resin. 8. A method for printing information comprising a sublimable dye-containing ink on an adhesive layer by heating a predetermined portion of the adhesive sheet for printing according to claim 1 through a thermal head from the heat conductive substrate side. And then separating the ink sheet from the adhesive layer. 9. The printing adhesive sheet according to claim 8, wherein the printing adhesive sheet is accommodated as a roll-shaped wound body, and printing is performed on the printing adhesive sheet portion unwound from the wound body. A method of manufacturing a label using a printer that discharges an adhesive sheet portion without separating an ink sheet. 10. The printing adhesive sheet according to claim 8, wherein the printing adhesive sheet is accommodated as a roll-shaped wound body, and the printing adhesive sheet portion unwound from the wound body is printed. A label manufacturing method using a printer that separates an ink sheet from an adhesive sheet portion and discharges the label sheet.