JP2012148828A - Rolled recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an impact that is caused when an end is separated from a core in a rolled recording medium that is wound around the core while the end of the recording medium is adhesively fixed to the core, to prevent the separated recording medium from adhering to a conveying member or the like, during transportation.SOLUTION: The rolled recording medium includes a single-side adhesive tape that is disposed to both the end and the core while lateral surfaces of both tapes are brought into contact with each other, so that the end and the core are adhesively fixed to each other by the adhesive exposed at the lateral surfaces.

Description

  The present invention relates to a roll-shaped recording medium that is supplied in a roll form by winding the recording medium around a core, and the problem that occurs when the end of the recording medium is peeled off the core by improving the portion that fixes the end of the recording medium to the core. The present invention relates to a solved roll-shaped recording medium.

In a recording system such as an ink jet recording system or a thermal recording system, a system in which a recording medium is wound in a roll and continuously supplied is used to the same extent as a system in which recording media are supplied one by one. In a high-grade apparatus, it is necessary to precisely control the conveyance of the recording medium when recording an image, and even with respect to a roll-shaped recording medium, the recording medium is fixed to the core so as not to cause misalignment during conveyance. ing.
As a roll-shaped long medium in which a medium is fixed to a core, for example, Patent Document 1 discloses a film in which a long film is directly fixed to a winding core with a double-sided tape. In Patent Document 2, a long ink film is directly heated to a core. What is fixed by welding or double-sided tape is disclosed.
As a roll-shaped recording medium in which the recording medium is fixed to the core, for example, as disclosed in Patent Document 3, a recording medium made of a thermoplastic resin is directly heat-welded to the core.

In a recording method such as an ink jet recording method, the end of the recording medium fixed to the core is peeled off from the core by the driving force of the medium so that the recording medium supplied in roll form can be used to the end. Many have been made available for recording.
In this case, the adhesive material for fixing, especially the adhesive material of the adhesive tape, will be transported through the printer, and this adhesive part will adhere to the members in the device and cause a conveyance failure or glue. There is a problem that the movement of the moving part of the apparatus is deteriorated by attaching the adhesive.
Further, since the fixing portion is peeled off by the transport driving force, the driving resistance suddenly increases at the fixing portion, and there is a problem that the driving device is heavily burdened and the life of the device is shortened. This problem is not limited to the ink jet recording apparatus, and may occur if the apparatus records on a recording medium.

JP-A-1-209281 JP-A-64-75275 JP 2000-191189 A

  The object of the present invention is to solve the above problems. That is, the present invention provides a roll-shaped recording medium in which no sticky substance remains at the end of the recording medium after peeling off from the core, and the recording medium is fixed to the winding core by a fixing method with low driving resistance.

Means for solving the above object is as described in Invention 1 below.
(Invention 1) In a recording medium roll formed by winding a recording medium around a core, the surface of the core is provided with a trapezoidal ridge, and the end of the core side surface of the recording medium is provided with a trapezoidal ridge.
The trapezoidal ridges of the core and the trapezoidal ridges of the recording medium are arranged on the side surface of the core ridges on the side opposite to the direction in which the recording medium is pulled out, and on the side surfaces of the trapezoidal ridges of the recording medium. Is placed as a face,
A recording medium roll, characterized in that the side surface of the pedestrian raised portion of the core contacting the surface and the side surface of the ridged raised portion of the recording medium are adhered and fixed.

Invention 2
The trapezoidal swelled portion of the recording medium is a laminate of an adhesive layer and a sheet from the recording medium side, and the side surface of the adhesive layer and the side surface of the trapezoidal ridged portion of the core are adhered. A recording medium roll according to the first aspect of the present invention.
Invention 3
The core-like raised portion of the core is obtained by laminating an adhesive layer and a sheet from the core side, and the side surface of the adhesive layer and the side surface of the trapezoidal raised portion of the recording medium are adhered. A recording medium roll according to any one of Invention 1 and Invention 2.
Invention 4
The recording medium roll according to any one of claims 1 to 3, wherein at least one of the trapezoidal bulge portion of the core and the trapezoidal bulge portion of the recording medium is intermittently disposed in a lateral width direction of the recording medium. is there.
Invention 5
5. The recording medium roll according to any one of inventions 1 to 4, wherein the trapezoidal swelled portions are arranged at different positions in the recording medium drawing direction.
Invention 6
The recording medium roll according to any one of the first to fifth aspects, wherein the recording medium has a separator layer on a core side surface, and the trapezoidal bulge portion of the recording medium is provided on the separator layer. It is.
Invention 7
The recording medium roll according to any one of Inventions 1 to 6, wherein the recording medium is an inkjet recording medium.

In the roll-shaped recording medium of the present invention, since the adhesive for fixing the recording medium to the core is not exposed on the surface of the terminal end of the drawer, the possibility of the recording medium sticking to the conveying member or the conveying side surface is low. In the case of a recording medium with a separator layer, it is particularly preferable to remove the separator layer from the recording medium after the end of the recording medium is removed from the core because the adhesive is removed from the recording medium.
In addition, since the fixing is performed by using the catch at the raised portion of the trapezoid, the adhesive area by the adhesive is small, the impact when the recording medium is removed from the core is small, and the impact on the driving member can be reduced.

FIG. 1 is a diagram illustrating an example of an embodiment of a roll-shaped recording medium, in which a base-like raised portion 21 and a core-like raised portion 11 provided directly on a base material of a recording medium 2 are adhered and fixed. It is a schematic diagram which shows. FIG. 2 is a diagram illustrating an example of an embodiment of a roll-shaped recording medium, and is a schematic diagram illustrating an example in which a separator layer 3 is provided on the recording medium 2 and a table-shaped raised portion 21 is provided thereon. FIG. 3 is a schematic diagram showing an example of the shape and arrangement of the trapezoidal swelled portion 11 of the core 1 and the corresponding trapezoidal swelled portion 21 on the recording medium 2 side. FIG. 4 shows a ridge-like rise of the core by adhering the side of the adhesive layer 12 of the core 1 shown in b1 of FIG. 3 and the side of the adhesive layer 22 of the recording medium 2 shown in b2 of FIG. It is the schematic diagram which showed the state which fixed the part 11 and the trapezoid rise part 21 of the recording medium.

Hereinafter, embodiments of a roll-shaped recording medium of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating an example of an embodiment of a roll-shaped recording medium, in which a base-like raised portion 21 and a core-like raised portion 11 provided directly on a base material of a recording medium 2 are adhered and fixed. It is a schematic diagram which shows.
A roll-shaped recording medium 10A shown in FIG. 1 is a recording medium roll that is supplied by winding the recording medium 2 around the core 1 with the recording surface facing outside. A trapezoidal swelled portion 21 is also provided on the core side surface of the end portion (winding start end portion) of the recording medium 2. The trapezoidal ridges 11 of the core and the trapezoidal ridges 21 of the recording medium are formed on the side surface of the core ridges 11 opposite to the direction in which the recording medium 2 is pulled out. The side surfaces of the portion 21 are arranged so as to contact each other as a surface, and the side surfaces of the core-like raised portion 11 of the core and the plate-like raised portion 21 of the recording medium which are in contact as the surface are fixed with an adhesive.

  In the roll-shaped recording medium 10A shown in FIG. 1, the lead-like raised portion 11 of the core and the raised-like portion 21 of the recording medium are formed by laminating an adhesive layer and a sheet, respectively, and the lead-like raised portion of the core is formed. In the part 11, the adhesive layer 12 and the sheet 13 are laminated in this order from the core 1 side, and in the trapezoidal raised part 21 of the recording medium, the adhesive layer 22 and the sheet 23 are laminated in this order from the recording medium 2 side. ing. With this configuration, the roll-shaped recording medium 10 </ b> A has the side surface of the core pressure-sensitive adhesive layer 13 and the side surface of the trapezoidal ridge portion 21 of the recording medium adhered, and the side surface of the pressure-sensitive adhesive layer 23 of the recording medium 2 and the core. Are adhered to the side surface of the raised platen 11.

Then, the recording medium 2 fixed by the raised portion 11 of the core and the raised portion 21 of the recording medium is wound around the core 1 a plurality of times to form a roll-shaped recording medium.
When the recording medium 2 is wound up and used up, the recording medium 2 is pulled in the direction of the arrow, and the trapezoidal ridge portion 21 of the recording medium is peeled off from the core ridge-like rising portion 11, and as the recording medium advances. It moves in the recording medium conveyance path of the recording apparatus.
Since the adhesive region exists only on the side surface of the raised plate-shaped portion and is not exposed on the surface of the recording medium, there is almost no risk of the recording medium sticking to the conveying member or the side surface during movement.

In FIG. 1, the core 1 may be any cylindrical one and may be a tube. Plastic or paper tubes are preferred.
On the outer surface of the core 1, a trapezoidal swelled portion 11 is provided in close contact with the surface. Any material may be used, and a member used for the core may be used. Alternatively, the adhesive 12 may be placed and a sheet 13 made of plastic or the like may be attached thereon. If a single-sided tape is affixed, the laminated body of the adhesive 12 and the sheet | seat 13 can be created in one process.

  In addition, the lead-like raised portion 11 of the core is provided with a trapezoid-like raised portion by attaching a thick plastic or the like to the core, and the side surface of the raised raised portion is adhered by applying an adhesive or applying an adhesive. It is good also as a surface where possible. Similarly, the trapezoidal bulge portion 21 of the recording medium is also provided with a trapezoidal bulge portion by attaching a thick plastic to the recording medium, and the side surface of the trapezoidal bulge portion is applied with adhesive or adhesive. It is good also as a surface which can adhere | attach by such as. The side plate-like raised portion 11 of the core and the plate-like raised portion 21 of the recording medium can be adhered to each other if at least one of them is a side that can be adhered. It should be noted that the lead-like raised portion 11 of the core and the trapezoid-like raised portion 21 of the recording medium are each provided with no adhesive on the upper surface facing the core or the recording medium.

  The side surface that is in contact with the side surface of the trapezoidal raised portion 21 of the recording medium, which is the side opposite to the direction in which the recording medium is pulled out of the core-like raised portion 11 of the core, is the lateral width direction of the core 1 (the lateral width direction of the recording medium). ) Along the surface extending in the vertical direction from the center line of the core 1 to the outer side of the core 1, and a surface inclined from the parallel surface to the outer side or the center side in the vertical direction. And / or a surface inclined in a direction intersecting the lateral width direction of the core 1 from the parallel surface. Their inclination is preferably 45 ° or less.

  In addition, the side surface of the recording medium trapezoidal bulge portion 21 that is in contact with the side surface of the core trapezoidal bulge portion 11 is the side surface in the direction in which the recording medium is pulled out. The surface is not limited to a surface parallel to a surface extending in the vertical direction from the center line of the core 1 toward the outside of the core 1 along the horizontal width direction (the horizontal width direction of the recording medium). It may be a surface inclined to the outside or the center side, and / or a surface inclined from the parallel surface in a direction intersecting the lateral width direction of the core 1, and the platform-like raised portion 11 of the core in contact with each other It is preferable that the surface be parallel to the side surface.

  The recording medium 2 may be composed only of a recordable base material, or may be composed of a base material 2A made of paper, a synthetic resin film, etc., and an ink receiving layer 2B. When the separator layer is not provided, the recording surface may be the core 1 side of the recording medium 2 or the side opposite to the core 1 side.

In the present invention, the pressure-sensitive adhesive used when the pressure-sensitive adhesive layers 13 and 23 are formed or when the pressure-sensitive adhesive is applied to the side surface of the trapezoidal bulging portion includes acrylic pressure-sensitive adhesive, rubber-based pressure-sensitive adhesive, and silicone-based pressure-sensitive adhesive. For example, there are ethylenically unsaturated copolymers having a repeating unit structure selected from monomers such as vinyl acetate, ethyl acrylate, ethyl methacrylate, methyl acrylic acid, and acrylic acid. Mention may also be made of homopolymers of ethylene or propylene, copolymers of ethylene and propylene, ionomers of ethylene and methylacrylic acid or acrylic acid, grafted anhydride copolymers, polyamides, polyurethanes, and compatible blends thereof. it can.
Moreover, the adhesive of a single-sided adhesive tape can also be utilized.

It is preferable to use a commercially available single-sided pressure-sensitive adhesive tape in order to provide the trapezoidal swelled portion. If this is used, the side surface of the single-sided adhesive tape becomes the side surface of the above-mentioned trapezoidal bulge portion, and the side surface of the pressure-sensitive adhesive portion can be used as the adhesive capacity portion, and the ridge-shaped ridge-up consisting of a laminate composed of an adhesive and a sheet The process of providing the part and the pressure-sensitive adhesive application process can be completed by a single process.
As shown in FIG. 1, the pressure-sensitive adhesive region of the trapezoidal bulge portion may be formed on both the side surface of the core bulge portion 11 and the side surface of the trapezoidal bulge portion 21 of the recording medium. What is necessary is just to be formed in the side surface of the base-like bulging part.
When the adhesive regions are formed in both the core-like raised portion 11 of the core and the plate-like raised portion 21 of the recording medium, at least one region of the regions having the adhesive ability in each of the raised-like portions is in contact with each other. The thickness of the pressure-sensitive adhesive layer and the application area of the pressure-sensitive adhesive are preferably adjusted and arranged. Thereby, both adhesion ability can be utilized.
The adhesive ability regions of the lead-like raised portion 11 of the core and the raised-like portion 21 of the recording medium are respectively an upper surface (top plateau) facing the core 1 or the recording medium 2 and a region close to the upper surface of the side surface (top of the side surface). ) Must be careful not to exist. In order to make such a form, it is most effective to use the above single-sided adhesive tape.

  For the sheets 13 and 23 in the present invention, a polyethylene film, a polypropylene film, a polyester film, or the like can be used.

Next, a specific example of a roll-shaped recording medium that has a separator layer 3 on the side opposite to the recording surface of the recording medium 2 and is suitably used as an inkjet recording medium will be shown.
FIG. 2 is a schematic cross-sectional view of one specific example. In FIG. 2, the recording medium 2 includes a base material 2A and an ink receiving layer 2B provided on one surface of the base material 2A. A release layer 32 and a separator substrate 31 are provided on the surface of the recording medium 2 opposite to the recording surface on which the ink receiving layer 2B is provided.

  As a material for forming the release layer 32 of the separator, for example, an acrylic adhesive, for example, a copolymer of isooctyl acrylate and acrylic acid, a synthetic rubber adhesive, for example, silicone, polyisoprene, polybutadiene, styrene-isoprene-styrene. Mention may be made, for example, of a natural rubber adhesive such as a copolymer. Silicone resin adhesives, acrylic adhesives, and synthetic rubber adhesives are particularly useful.

  The thickness of the release layer 32 is preferably about 0.1 to 1.0 μm.

  As the base material 31 of the separator, for example, a base material similar to the base material for recording media made of PET film, olefin resin film, PPS resin film, TAC film, acrylic resin film can be selected, and the thickness is 25 to 150 μm. Degree.

  In the present invention, the roll-shaped recording medium 10B which is the recording medium 2 with the separator layer 3 is specifically prepared as follows.

[Preparation of recording medium 2 with separator layer 3]
Silicone resin adhesive (FS XA-2541, manufactured by Dow Corning Asia Co., Ltd.) / Silicone rubber (Shirascon RTV4086A, Dow Corning Asia Co., Ltd.) on one side of a PET film having a thickness of 50 μm as the separator substrate 31 Company) / Silicone rubber (Silascon RTV4086B, manufactured by Dow Corning Asia Co., Ltd.) = 24.8 / 37.6 / 37.6 and adjusted to a non-volatile content of 30.0% using toluene The recording medium 2 with the separator layer 3, which is applied using a Mayer bar so as to have a dry film thickness of 30 μm, dried and cured in hot air at 165 ° C. for 2 hours, and provided with a release layer 32 on the separator substrate 31. Produced.
The separator-attached medium 3 is affixed to the surface of the long inkjet recording medium having the ink-receiving layer 2B opposite to the side where the ink-receiving layer 2B is provided, and the roll-like recording medium 10B that is the recording medium 2 with the separator layer 3 is attached. It was.

On the surface of the separator substrate 31, a trapezoidal raised portion was formed as shown in FIG. That is, single-sided adhesive tape 21 is adhered obliquely as the b ₂ shown in FIG. 3 as a base-like embossment 21 of the recording medium. The pressure-sensitive adhesive layer 22 constituting the rising portion 21 of the recording medium is a pressure-sensitive adhesive layer made of the following pressure-sensitive adhesive having a thickness of 125 μm, for example, and the sheet 23 is a PET sheet having a thickness of 75 μm, for example.

On the other hand, a single-sided adhesive tape is used as the bulging portion 11 of the core of b ₁ shown in FIG. 3 so that the side of the single-sided adhesive tape 21 obliquely affixed also to the core 1 (for example, paper tube) side can be contacted. To be pasted. The single-sided adhesive tape is composed of an adhesive layer 12 and a sheet 13.

The adhesive of the adhesive layers 12 and 22 is specifically prepared as follows.
(Creation of adhesive)
After mixing 87 g of methyl acrylate, 13 g of 2-hydroxyethyl acrylate, 60 g of 2-butanone, and 60 g of ethyl acetate and stirring in a nitrogen atmosphere at 60 ° C. for 24 hours, an acryloyl group-added cresol novolak resin (Nipponka) is used as an epoxy resin. Yakuhin Co., Ltd., CNA-147) 24 g, as thermosetting agent, sylock type phenolic resin (Mitsui Chemicals, Millex XLC-4L) 5 g, as curing accelerator, imidazole (manufactured by Shikoku Kasei Kogyo Co., Ltd., Curesol 2PHZ) 0.2 g (solid content conversion value) was added to obtain an adhesive.

  A commercially available one-sided adhesive tape can be used as it is, and the number of processes can be reduced.

And as shown in FIG. 4, it arrange | positions so that the side surface of each adhesive layer (adhesive layer 12 and adhesive layer 22) of the trapezoid rising part 11 of a core and the trapezoid rising part 21 of a recording medium may contact | connect. For example, it adheres with the adhesive force of both adhesive layers.
For example, if a single-sided adhesive tape consisting of a 125 μm thick adhesive layer and a 75 μm thick sheet is used as the pedestal raised portion 11 of the core and the ridged raised portion 21 of the recording medium, it is fixed with a length of about 50 μm. Will do.
The single-sided adhesive tape is peeled off from the recording medium 2 together by peeling off the separator.

  FIG. 3 shows another example of the arrangement method of the raised portions of the core-like raised portion 11 of the core and the raised-like portion 21 of the recording medium.

As shown in the arrangement form shown in A (a ₁ , a ₂ ), it is preferable to extend and provide the trapezoidal bulge portion 11 along the lateral width direction (left and right direction in FIG. 3) of the core 1. Similarly, the plate-like raised portion 21 of the recording medium may be provided continuously along the horizontal width direction of the recording medium 2 (the same as the horizontal width direction of the core).

Like the arrangement form B (b ₁ , b ₂ ), the raised plate-like portions may be provided continuously in the horizontal width direction, and may be provided at different positions in the recording medium drawing direction (arrow direction in FIG. 3). In addition, at least one of the core-shaped raised portion 11 of the core and the trapezoid-shaped raised portion 21 of the recording medium may be provided intermittently in the width direction.

In the arrangement form C (c ₁ , c ₂ ), the trapezoidal raised portions are provided intermittently in the horizontal width direction and are arranged at different positions in the recording medium pulling direction. By disposing the trapezoidal raised portions at different positions in the pull-out direction, it is possible to reduce the impact load on the apparatus by temporally dispersing the resistance when the recording medium 2 peels from the core 1 in the trapezoidal raised portion. . Further, the resistance when the recording medium 2 is peeled off from the core 1 can be adjusted by intermittently providing the trapezoidal raised portions in the lateral width direction. In particular, in the arrangement form C, the drag force when the recording medium 2 is peeled off can be reduced by disposing a plurality of trapezoidal ridges having a short length in the direction in which the recording medium 2 is pulled out, with different positions in the pulling direction. The impact load on the drive device of the medium 2 can be reduced, and the life of the machine can be extended. Note that the resistance when the recording medium 2 is peeled off from the core 1 can be adjusted by intermittently providing at least one of the core-like raised portion of the lead and the trapezoid-like raised portion of the recording medium.

  Further, the side surface that is in contact with the side surface of the trapezoidal raised portion 21 of the recording medium, that is, the side surface opposite to the direction in which the recording medium is pulled out of the core-like raised portion 11 is the horizontal width direction of the core 1 (the horizontal width direction of the recording medium). ) Along the surface extending in the vertical direction from the center line of the core 1 to the outer side of the core 1, and a surface inclined from the parallel surface to the outer side or the center side in the vertical direction. It is good. In this case, for example, the longitudinal section of the core-like raised portion 11 of the core is trapezoidal. At this time, the side surface of the trapezoidal bulge portion 21 of the recording medium in contact with the side surface of the trapezoidal bulge portion 11 of the core 1 is preferably parallel to the side surface of the trapezoidal bulge portion 11 of the core 1. It is preferable to be formed as.

  1 core, 2 recording medium, 2A base material for recording medium, 2B ink receiving layer, 3 separator layer, 10A, 10B roll-shaped recording medium, 11 core plate-shaped raised portion, 12 adhesive layer, 13 sheet, 21 recording A trapezoidal climax part of the medium, 22 adhesive layer, 23 sheet, 31 separator substrate, 32 release layer.

Claims (7)

In a recording medium roll formed by winding a recording medium around a core, the surface of the core includes a trapezoidal ridge, and the recording medium includes a trapezoidal ridge on the end of the core side surface,
The trapezoidal ridges of the core and the trapezoidal ridges of the recording medium are arranged on the side surface of the core ridges on the side opposite to the direction in which the recording medium is pulled out, and on the side surfaces of the trapezoidal ridges of the recording medium. Is placed as a face,
A recording medium roll, characterized in that the side surface of the pedestrian raised portion of the core contacting the surface and the side surface of the ridged raised portion of the recording medium are adhered and fixed.   The trapezoidal swelled portion of the recording medium is a laminate of an adhesive layer and a sheet from the recording medium side, and the side surface of the adhesive layer and the side surface of the trapezoidal ridged portion of the core are adhered. The recording medium roll according to claim 1, wherein   The core-like raised portion of the core is obtained by laminating an adhesive layer and a sheet from the core side, and the side surface of the adhesive layer and the side surface of the trapezoidal raised portion of the recording medium are adhered. The recording medium roll according to claim 1 or 2.   4. The recording medium roll according to claim 1, wherein at least one of the trapezoidal bulge portion of the core and the trapezoidal bulge portion of the recording medium is intermittently disposed in a lateral width direction of the recording medium. .   The recording medium roll according to any one of claims 1 to 4, wherein the trapezoidal ridges are arranged at different positions in the recording medium drawing direction.   6. The recording medium according to claim 1, wherein the recording medium has a separator layer on a core side surface, and the trapezoidal bulge portion of the recording medium is provided on the separator layer. Recording media roll.   The recording medium roll according to any one of claims 1 to 6, wherein the recording medium is an inkjet recording medium.

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