JP2002169319A - Double-sided printing sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-sided printing sheet usable as a double-sided printing sheet of a larger thickness as well as to enable printing on the double- sided printing sheet with an adhesive without causing paper jamming, deformation, curling, print shift, heat shrinkage, etc. SOLUTION: The front face 11B and rear face 12B of a foamed polyester film 10B are subjected to non-sticking or releasing treatment, an adhesive 20B, 20B is applied to the front face 11B and rear face 12B, and the rear faces 32B, 32B of sheets of paper or surface-treated synthetic resin films 30B, 30B for printing are stuck on the adhesive 20B, 20B to obtain the objective double- sided printing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided printing sheet with an adhesive which can be printed on both sides by a printing machine such as a laser printer, an ink jet printer or an electronic copier.

[0002]

2. Description of the Related Art Conventionally, a pressure-sensitive adhesive layer is provided on both sides of a release sheet so as to be releasable, and a printing paper or a synthetic resin film for surface treatment is adhered thereon, and a double-sided printing sheet with an adhesive is provided. When printing is performed by the above-described printing machine, the following disadvantages are likely to occur. Paper jams in printing machines are likely to occur. The reason is that the release sheet is generally a relatively hard sheet of thick material, when a small reversing printing machine is used,
Paper jams in the printing press are particularly likely to occur, such as when a two-sided printing press that passes through the toner fixing roller twice inside the printing press is used. In addition, deformation, curl, print misalignment, heat shrinkage, and the like are likely to occur on the printed printing sheet. The reason for this is that the printing sheet passes through a heat roller, so the printing is performed due to the heat resistance of the release sheet, the difference in the coefficient of thermal expansion between the release sheet and the printing sheet, the degree of moisture absorption of the printing sheet, and the like. Deformation, curl, print misalignment, heat shrinkage, etc. of the sheet for printing are likely to occur.
Therefore, the present inventor has succeeded in solving the above-described problems by using a foamed polyester film having a high heat resistance and a high heat insulating property, being more flexible than a normal release sheet, and having a high tensile strength. .

[0003]

That is, the present invention provides:
An object of the present invention is to provide a double-sided printing sheet capable of printing on a double-sided printing sheet with an adhesive without causing paper jam and without causing deformation, curl, printing misalignment, heat shrinkage and the like. Further, the present invention provides a double-sided printing sheet which can use a thicker double-sided printing sheet with an adhesive than before.

[0004]

In order to achieve the above object, the double-sided printing sheet of the present invention has a surface 11 and a rear surface 12 of a foamed polyester film 10 which are non-adhesive or release-treated, respectively, as shown in the drawing. Agents 20, 20 are applied, and the back surfaces 32, 32 of paper or surface-treated synthetic resin films 30, 30, which have been subjected to surface treatment, are adhered thereon. In the present invention, it is preferable to use a foamed polyester film having a thickness of 15 μm or more and 250 μm or less. In the present invention, the non-adhesive or release treatment of the front and back surfaces of the foamed polyester film is achieved by applying silicon, forming a fine uneven surface, and laminating the non-adhesive or release film. Since silicon coating is known, detailed description is omitted. The micro-textured surface for the foamed polyester film includes the formation of micro-textured surface on the film itself during or after film forming, and the formation of micro-textured surface by film coating of matting agent such as micro silica particles and micro bead particles. In addition, in some cases, non-adhesiveness to the adhesive surface or releasability can be exhibited in combination with the physical properties of the releasability of the polyester film itself. Non-adhesive or release films include, in addition to polyester films, polyvinyl fluoride films, polypropylene films, nylon films, and the like. In some cases, releasability can be exhibited. In addition, when the non-adhesive or release film is processed into a fine uneven surface, the non-adhesive or release effect on the adhesive surface is further exhibited. Synthetic resin films for printing require coating with an antistatic agent and a matting agent for toner fixing for printing, prevention of double feed, improvement of running properties, prevention of static electricity, etc., and this is known. Therefore, detailed description is omitted. When a polyethylene terephthalate film or a polyethylene naphthalate film is used as the synthetic resin film for printing, the thickness is preferably 25 microns to 100 microns. The paper is preferably a known paper for a laser printer, electronic copying, or an ink jet printer.

[0005]

First Embodiment FIG. 1 shows a first embodiment of the present invention. The double-sided printing sheet according to the embodiment of the present invention comprises a foamed polyester film 10, pressure-sensitive adhesive layers 20, 20, a synthetic resin film for printing 30, which has been subjected to a surface treatment of a matting agent with an antistatic agent and silica fine particles. The foamed polyester film 10 is a closed-cell foamed polyethylene terephthalate film. Both surfaces of the front surface 11 and the back surface 12 are coated with a synthetic resin coating of a silica fine matting agent to form minute uneven surfaces 111 and 121, and the adhesive layer 2 is formed.
0 and 20 are peelably adhered. Adhesive layer 2
Numeral 0 is adhered to the back surface 32 of the synthetic resin film for printing 30, 30 and is detachably adhered to the front surface 11 and the back surface 12 of the foamed polyester film 10. The printing film is made of polyethylene terephthalate film,
On the front surface 31, a surface coating layer 311 of a matting agent formed by an antistatic agent and silica fine particles is formed,
The pressure-sensitive adhesive layer 20 is adhered by the primer treatment. Therefore, when the double-sided printing sheet of the embodiment of the invention is used for printing, the release sheet 10 has more flexibility, heat insulation and tensile strength than the case where a conventional release sheet is used. No curl or print misalignment occurred. Further, the maximum thickness of the conventional double-sided printing sheet was 200 microns, but a thicker double-sided printing sheet of about 250 microns could be passed through the printing machine. Further, the double-sided printing sheet of the embodiment of the present invention, even if the synthetic resin film for printing having a different thickness, or one or both of the synthetic resin films for printing are provided with perforations, half cuts, etc. Nothing happened.

[0006]

Second Embodiment A second embodiment of the present invention is shown in FIG. The double-sided printing sheet of the embodiment of the present invention is made of a foamed polyester film 10 of which both sides are siliconized.
B, adhesive layer 20B, 20B, printing paper 30B, 30B
Consists of Since the foamed polyester film 10B and the pressure-sensitive adhesive layer 20B excluding the silicon treatment are the same as those in the first embodiment of the invention, detailed description will be omitted. The paper is a known printing paper, and a detailed description is omitted. When the double-sided printing sheet of the embodiment of the present invention is printed, when the humidity in the room is large, under the influence of heat, paper jam due to the curl of the paper is liable to occur conventionally. The paper is hardly affected by heat and does not cause paper jam due to curling. In addition, no deformation, curl, print misalignment, heat shrinkage, etc. occurred at all as in the first embodiment of the invention.

[0007]

As described above, the double-sided printing sheet of the present invention can be printed without causing paper jam, deformation, curl, printing misalignment, heat shrinkage and the like. Can be printed. Therefore, printing on thick label paper or postcard paper can be performed efficiently, and the practical value of the present invention is great.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a partially enlarged cross section showing an embodiment of the present invention.

FIG. 2 is an explanatory view of another partially enlarged cross section showing the embodiment of the present invention.

[Explanation of symbols]

 10, 10B Foamed polyester film 11, 11B Surface of foamed polyester film 12, 12B Backside of foamed polyester film 20, 20B Adhesive layer 30, 30B Printing paper or synthetic resin film 32, 32B Backing of printing paper or synthetic resin film

Continued on the front page F term (reference) 2H086 BA01 BA15 BA19 BA24 BA31 4F100 AA20H AK01B AK01C AK01D AK01E AK41A AK42 AK52G BA03 BA05 BA06 BA10B BA10C BA13 CA17B CA17C CA22B CA22C CB05 CC01B01B01 EBJB CB01B01 CB01B01 CB01E JL04 JL13D JL13E JL14D JL14E

Claims (5)

[Claims] 1. A front side and a back side of a foamed polyester film are respectively subjected to a non-adhesive or release treatment to apply an adhesive, and a back surface of a paper or a surface-treated synthetic resin film subjected to a surface treatment is adhered thereon. A double-sided printing sheet, characterized in that: 2. The double-sided printing sheet according to claim 1, wherein the non-adhesive or release treatment of the front and back surfaces of the foamed polyester film is performed by applying silicon. 3. The double-sided printing sheet according to claim 1, wherein the non-adhesive or release treatment of the front and back surfaces of the foamed polyester film is performed by forming fine irregularities on the front and back surfaces of the foamed polyester film. 4. The double-sided surface according to claim 1, wherein the non-adhesive or release treatment of the front and back surfaces of the expanded polyester film is performed by laminating a non-adhesive or release synthetic resin film on the front and back surfaces of the expanded polyester film. Print sheet. 5. The double-sided printing sheet according to claim 1, wherein the surface-treated synthetic resin film for printing is a synthetic resin coating containing an antistatic agent and a matting agent.