JP5383119B2 - How to connect release sheets - Google Patents

Description

  The present invention relates to a method for joining release sheets.

A large number of adhesive sheets are attached to the release surface of a continuous release sheet at predetermined intervals and wound into a roll. The adhesive sheet roll is attached to a labeling machine, and the release sheet is continuously fed to peel off the labeling machine. It is widely practiced to peel the pressure-sensitive adhesive sheet from the release sheet at the plate portion and stick the peeled pressure-sensitive adhesive sheet to a continuously fed product.
There are two types of pressure-sensitive adhesive sheets, one having a pressure-sensitive adhesive layer on one side of the substrate and the other having a pressure-sensitive adhesive layer on both sides. In particular, in the latter case, a double-sided release sheet in which a release agent layer is provided on both sides of a substrate may be used as the release sheet.

  In the process of manufacturing the pressure-sensitive adhesive sheet roll, it is necessary to connect the release sheets on a daily basis by removing the defective portion due to the breakage of the release sheets or the mixing of foreign substances. When connecting the release sheets, it is necessary to select a connecting tape and a connecting method, but if these selections are inappropriate, the connecting tape will be peeled off during processing on the labeling machine, and the connecting part will be cut. The tether tape that has been loosened or peeled off may stick to the labeling machine or other parts of the roll, causing unexpected problems. Therefore, when connecting, an appropriate connecting tape and an appropriate connecting method are required.

As a method for joining roll paper, a method has been proposed in which a pressure-sensitive adhesive layer is attached to the leading end of the roll paper, and the paper is attached to the surface of the pressure-sensitive adhesive layer (see Patent Document 1).
However, since the connecting tape used in this method is a type that does not have a surface base material, there is a problem that the connecting tape peels off or slips when tension is applied to the released release sheet, as in processing with a labeling machine. It was.

  Therefore, it is performed that the release sheet to be connected is butted between the end portions of the release sheet, and a connection tape having an adhesive layer provided on one side of the base material is attached to the part. However, in this method, when using a flexible tape such as a thin tape compared with the flexibility of the release sheet, especially when processing with an intermittent labeling machine, the side of the surface where the connecting tape is attached is the connecting part. The phenomenon of bending inside tends to occur. Along with this, the connecting tape is peeled off from the release sheet, the adhesive layer surface of the connecting tape is exposed and sticks to the device, or the bent part is caught in an undesired part of the device, often causing trouble. .

On the other hand, in order to prevent them, when using a low-flexible tie tape such as a thick tape, it will be difficult for the fold to occur, but the tie tape will not be able to follow the folded portion of the peel plate as it passes through the peel plate. A new problem will occur. In addition, there is a method of attaching a thin connecting tape to both the front and back sides of the butt portion of the release sheet, but the operation itself is complicated and the type of the adhesive sheet and the double-sided release sheet have an adhesive layer on both sides. When is used, the adhesive surface and the base material surface of the connecting tape stick to each other, so that troubles that cannot be fed out from the roll easily occur. Therefore, there is a demand for a connection method that does not cause the above trouble.

JP-A-7-101603

  In particular, the present invention attaches a pressure-sensitive adhesive sheet roll continuously wound at a predetermined interval to a release agent surface of a continuous release sheet and wound up in a roll shape, and attaches the release sheet to a labeling machine. When the adhesive sheet is attached to a product that is continuously fed out and peeled off at the peel plate part of the labeling machine, and the sticky sheet is stuck on the product that is continuously fed out, the peeling tape does not peel off at the peel plate part, and It is an object of the present invention to provide a joining method of a release sheet that can prevent bending at a position and entrainment associated therewith, and an adhesive tape for joining that can be used in a joining method of the release sheet.

The present inventor has conducted extensive studies to solve the above problems, when connecting the release sheet, as connecting adhesive tape, the silicone flexibility adhesive tape to have a silicone adhesive layer on one side of the substrate Reinforcing adhesive tape is bonded to the surface opposite to the system adhesive layer, with a 1 to 5 mm interval in the delivery direction from the leading edge in the delivery direction of the release sheet of the flexible adhesive tape , When connecting release sheets having a release agent layer on at least one side of a base material sheet using a bonding adhesive tape in which the thickness of the tip portion in the delivery direction of the release sheet is thinner than the thickness of the central portion, each release sheet The end portions of the release sheets are butted or overlapped so that the surfaces of the release agent layers face in the same direction, and the release agent layers of the release sheets straddling the butted ends or the overlapped ends. On the surface By laminating the tie adhesive tape in terms of the silicone adhesive layer, it can solve the above problems, and have completed the present invention.

That is, in the present invention, when connecting release sheets having a release agent layer on at least one side of the base sheet, the end portions of the release sheets are arranged so that the surfaces of the release agent layers of the release sheets face the same direction. butt to each other or overlapping, the surface of the butt end or overlapped combined across end release agent layer of the release sheet, the flexibility adhesive to have a silicone adhesive layer on one side of the substrate Reinforcing adhesive tape is bonded to the surface of the tape opposite to the silicone-based adhesive layer at a distance of 1 to 5 mm from the leading edge of the release sheet of the flexible adhesive tape in the delivery direction. A release sheet joining method, characterized in that a bonding adhesive tape having a thickness at the front end in the feeding direction of the release sheet that is thinner than the thickness of the center is bonded on the surface of the silicone-based adhesive layer. To provide That.

Further, the present invention provides the above-described method for joining release sheets , wherein the reinforcing adhesive tape is an adhesive in which the adhesive sheet is continuously applied to the release agent surface of the release sheet with a predetermined interval and wound into a roll. When a sheet roll is attached to a labeling machine, the release sheet is continuously fed out, and the peel sheet is peeled off at the peel plate portion of the labeling machine to stick the adhesive sheet to a continuously fed product. The present invention provides a method for joining release sheets that are bonded so as not to peel off at the plate portion .
Moreover, this invention WHEREIN: In the said joining method of a peeling sheet, the bending elastic modulus of the base material of the said adhesive tape for reinforcement is 3.0 * 10 < ^-5 > N * m -3.5 * 10 < ^-4 > N * m. A method for joining release sheets is provided.
Further, the present invention provides the above-mentioned release sheet joining method, wherein the adhesive force of the adhesive layer of the reinforcing adhesive tape to the release agent layer of the flexible adhesive tape is such that the flexible adhesive to the release agent layer of the release sheet. The present invention provides a method for joining release sheets that is 1.5 times or more the adhesive strength of a silicone pressure-sensitive adhesive layer of a tape.
Moreover, this invention is a joining method of the said peeling sheet, The said peeling sheet, the said flexible adhesive tape, and the said adhesive tape for reinforcement have all the same width | variety, The joining sheet of the peeling sheet in any one of Claims 1-3. A method is provided.
Moreover, this invention provides the connection method of the peeling sheet whose release agent of the said release sheet is a silicone type release agent in the connection method of the said release sheet.

Moreover, this invention provides the connection method of the peeling sheet in which the said release sheet has a silicone type release agent layer on both surfaces of a base material sheet in the said connection method of a release sheet.
Further, the present invention provides the above-described method for joining release sheets, wherein the reinforcing adhesive tape bonded to the surface of the flexible adhesive tape is fed from the end edge in the delivery direction of the release sheet of the flexible adhesive tape. The present invention provides a method for joining release sheets that are pasted at intervals in the opposite direction.

Further, the present invention provides a release sheet in which the flexible pressure-sensitive adhesive tape is provided with a silicone-based pressure-sensitive adhesive layer on one surface of the base material and a release agent layer is provided on the other surface. It provides a connection method.
Moreover, this invention provides the joining method of the peeling sheet in which the adhesive tape for reinforcement is provided with the acrylic resin-type adhesive layer in the one surface of a base material in the said joining method of a peeling sheet.
Further, the present invention provides a connecting adhesive tape for use in connecting a release sheet together, opposite to the flexible adhesive tape the silicone based pressure-sensitive adhesive layer to have a silicone adhesive layer on one side of the substrate The front surface of the release sheet of the release sheet of the release sheet of the flexible adhesive tape has a 1 to 5 mm interval in the delivery direction from the front edge of the release sheet of the release sheet of the flexible adhesive tape . The present invention provides a bonding adhesive tape characterized in that the thickness is thinner than the thickness of the central portion.
Further, the present invention provides the adhesive tape for joining used when joining the release sheets, wherein the reinforcing adhesive tape continuously attaches the adhesive sheet to the release agent surface of the release sheet at a predetermined interval. The adhesive sheet roll wound up in a roll is attached to a labeling machine, the release sheet is continuously fed out, and the adhesive sheet is peeled off at the peel plate portion of the labeling machine, and the adhesive sheet is applied to products that are continuously fed out. When sticking, the adhesive tape for joining currently bonded so that it may not peel at a peel plate part is provided.

  The connecting method of the release sheet of the present invention is particularly a method of attaching an adhesive sheet roll obtained by continuously sticking an adhesive sheet to a release agent surface of a continuous release sheet at a predetermined interval and winding it in a roll shape to a labeling machine. When the adhesive sheet is stuck to a product that is continuously fed out by peeling off the adhesive sheet at the peel plate portion of the labeling machine, the connecting tape is peeled off at the peel plate portion. It does not occur, and it is possible to prevent bending at the connecting position and entrainment associated therewith.

The present invention provides a method of connecting release sheets having a release agent layer on at least one side of a base sheet.
FIG. 1 is a cross-sectional view showing an example of a method for joining release sheets of the present invention, showing a state in which end portions of two release sheets are bonded together with an adhesive tape for joining.
As the base sheet 2 in the release sheet 1, paper such as high quality paper, clay coated paper, cast coated paper, kraft paper, laminated paper obtained by laminating a thermoplastic resin such as polyethylene resin on these paper, synthetic paper, etc. Paper sheet, polyolefin resin such as polyethylene resin, polypropylene resin, polyester resin such as polybutylene terephthalate resin, polyethylene terephthalate resin, polyethylene naphthalate resin, polyetherimide resin, acetate resin, polystyrene resin, vinyl chloride resin, etc. Examples thereof include a resin sheet. The base sheet 2 may be a single layer or a multilayer of two or more layers of the same type or different types.

The thickness of the base sheet 2 is not particularly limited, but when the base sheet 2 is a paper sheet, it is usually preferably 40 to 180 μm, more preferably 50 to 150 μm, and the base sheet 2 is a synthetic resin. When it is a sheet | seat, 20-130 micrometers is preferable normally, More preferably, it is 25-100 micrometers.
The release sheet 1 has the release agent layer 3 on at least one side of the base sheet 2, but may have the release agent layer 3 and the release agent layer 4 on both sides of the base sheet 2, respectively. If it has a release agent layer on both surfaces of the substrate sheet 2, it can also be used as a release sheet for a double-sided adhesive sheet having an adhesive layer on both sides of the substrate.

An adhesive sheet can be attached to the surface of the release agent layer of the release sheet 1 at a predetermined interval. Various pressure-sensitive adhesive sheets can be used as the pressure-sensitive adhesive sheet. An interval between the pressure-sensitive adhesive sheets can also be appropriately selected.
When the double-sided release sheet is used for a double-sided pressure-sensitive adhesive sheet, the release agent layer 3 is placed so that the pressure-sensitive adhesive sheet 14 is attached to one surface of the release sheet when the release sheet is sent out from the pressure-sensitive adhesive sheet roll. In many cases, a difference is provided between the release force of the release agent layer 4 and the release agent layer 4. In the case of FIG. 1, if the release agent layer 3 is made heavy release and the release agent layer 4 is light release, the adhesive sheet 14 is moved to the release agent layer 3 side when the release sheet 1 is sent out from the adhesive sheet roll. Attached state. It is preferable to affix the adhesive tape 5 for joining to the release agent layer 3 side so that it may not adhere to the adhesive sheet 14. Thereby, the adhesive layer 16 on the exposed side of the double-sided pressure-sensitive adhesive sheet 14 can be used without adhering to other portions of the pressure-sensitive adhesive sheet roll including the adhesive tape 5 for connection.

Examples of the release agent used for the release agent layer 3 and the release agent layer 4 include various silicone release agents. Preferred examples include dimethylpolysiloxane, vinyl group-containing addition-type dimethylpolysiloxane, and silicon-bonded hydrogen. Examples thereof include polyorganosiloxane having atoms, polyorganosiloxane having alkenyl groups and silicon-bonded hydrogen atoms, polyorganosiloxane having no functional group, and addition type polyorganosiloxane having an alkenyl group having 4 or more carbon atoms.
The thickness of the release agent layer 3 and the release agent layer 4 may be appropriately selected in order to obtain the required release force, but in the case of a silicone release agent, a range of 0.02 to 0.5 μm is usually preferable. The range of 0.03-0.3 μm is more preferable, and the range of 0.05-0.2 μm is more preferable.

The connecting pressure-sensitive adhesive tape 5 used in the present invention has a silicone-based pressure-sensitive adhesive layer 9, and has a structure in which the thickness of the distal end portion in the feeding direction of the release sheet 1 is thinner than the thickness of the central portion.
The silicone pressure-sensitive adhesive layer 9 is usually provided on one side of the substrate.
As a base material, the thing similar to the base material sheet 2 of the said peeling sheet 1 is mentioned.
The silicone-based pressure-sensitive adhesive used for the silicone-based pressure-sensitive adhesive layer 9 is, for example, a silicone rubber component composed of a polyorganosiloxane having a high degree of polymerization, a co-polymer composed of (CH ₃ ) ₃ SiO _1/2 units and SiO ₂ units. Examples thereof include a silicone-based pressure-sensitive adhesive that contains a silicone resin component that is a coalescence and is cured by a platinum-based crosslinking agent.
5-50 micrometers is preferable, as for the thickness of the silicone type adhesive layer 9, 8-40 micrometers is more preferable, and 10-30 micrometers is still more preferable.

The adhesive pressure-sensitive adhesive tape 5 has a release sheet 1 of the flexible pressure-sensitive adhesive tape 6 on the surface opposite to the silicone-based pressure-sensitive adhesive layer 9 of the flexible pressure-sensitive adhesive tape 6 having the silicone-based pressure-sensitive adhesive layer 9 on one side of the substrate 7. spaced from the direction of the tip edge delivery of, Ru der that stuck the reinforcing adhesive tape 10.
The flexible pressure-sensitive adhesive tape 6 may be provided with a silicone pressure-sensitive adhesive layer 9 on one surface of a substrate 7 and a release agent layer 8 on the other surface.
In the flexible adhesive tape 6, the substrate 7 may be the same as the substrate sheet 2 of the release sheet 1, but a film substrate such as polyethylene terephthalate resin or polypropylene resin is preferable.
The surface of the base material 7 on which the release agent layer 8 is provided can be subjected to the same surface treatment as described above, if desired, in order to improve the adhesion with the release agent layer 8.

  If the adhesive force of the silicone-based pressure-sensitive adhesive layer 9 to the release agent layer 3 of the release sheet 1 deviates from the intended application position when the bonding adhesive tape 5 is applied, the bonding adhesive tape 5 can be reapplied. It is preferable to be strong to such an extent that the silicone pressure-sensitive adhesive layer 9 and the release agent layer 3 do not peel when being sent out by a labeling machine. The preferable range is that the release sheet 1 and the flexible adhesive tape 6 are bonded with a 2 kg roller, and immediately after the bonding, the flexible adhesive tape 6 is pulled at a speed of 300 mm / min in the direction of 180 ° with respect to the release sheet 1. The adhesive strength when peeled off is 0.5 to 4.0 N / 25 mm, and a more preferable range is 1.5 to 3.5 N / 25 mm.

Thinner portion than the thickness of the thickness of the central portion of the feed-out direction of the distal end portion release sheet 1 has a length of its leading edge or al 1 to 5 mm, more preferably 1.5 to 4 mm, 1.5 to 3 mm Is most preferred. Here, the central portion refers to a portion excluding the front end portion and the rear end portion of the release sheet 1, and the thickness of the central portion refers to an average thickness within the range of the central portion.
The thickness of the connecting tape having the thin tip is preferably 70 μm or less, and more preferably 65 μm or less.

If the thickness of the base material 7 of the flexible adhesive tape 6 is too thick, it is not preferable because it cannot easily follow the folded portion of the peel plate when passing through the peel plate of the labeling machine and easily peels off from the release sheet 1. A preferred range is less than 50 μm, a more preferred range is 10 to 45 μm, and a further preferred range is 15 to 40 μm.
The base material 7 of the flexible adhesive tape 6 preferably has a flexural modulus of 2.8 × 10 ⁻⁵ N · m or less, more preferably 2.5 × 10 ⁻⁵ N · m or less. Preferably, it is 2.0 × 10 ⁻⁵ N · m or less. If the flexural modulus is too large, peeling occurs at the peel plate portion of the labeling machine.
10-70 mm is preferable, as for the length of the delivery direction of the base material 7, 20-60 mm is more preferable, and 25-55 mm is still more preferable.

Examples of the release agent layer 8 provided on the other surface of the base material 7 of the flexible adhesive tape 6 include the same as the release agent layer. The release agent layer 8 is preferably more releasable than the release agent layer 3 in order to firmly fix the reinforcing adhesive tape 10 thicker than the flexible adhesive tape 6.
The thickness of the release agent layer 8 may be appropriately selected in order to obtain a required release force. However, in the case of a silicone release agent, a range of 0.02 to 0.5 μm is usually preferable, and 0.03 to 0 The range of 0.3 μm is more preferable, and the range of 0.05 to 0.2 μm is more preferable.
Examples of the silicone pressure-sensitive adhesive layer 9 include the same ones as the silicone pressure-sensitive adhesive layer.

The reinforcing adhesive tape 10 used for the connecting adhesive tape 5 is provided with an adhesive layer 12 on one surface of a substrate 11 .
Examples of the base material 11 of the reinforcing pressure-sensitive adhesive tape 10 include those similar to the base material sheet 2 of the release sheet 1, but film base materials such as polyethylene terephthalate resin and polypropylene resin are preferable.
If the thickness of the base material 11 of the reinforcing adhesive tape 10 is too thick, it is not preferable because it becomes difficult to bend at the peel plate portion of the labeling machine. A preferable range is 15 to 100 mm, a more preferable range is 40 to 90 mm, and a further preferable range is 45 to 80 mm.

Further, the base material 11 preferably has a flexural modulus of 3.0 × 10 ⁻⁵ N · m or more, more preferably 3.5 × 10 ⁻⁵ N · m or more, and 3.8 ×. More preferably, it is 10 ⁻⁵ N · m or more. The upper limit of the flexural modulus is only required to be such that the adhesive pressure-sensitive adhesive tape 10 can be bent without being peeled off from the release agent layer 8 at the peel plate portion of the labeling machine, and is 3.5 × 10 ⁻⁴ N · m or less. Is preferred.
Examples of the adhesive used in the adhesive layer 12 of the reinforcing adhesive tape 10 include natural rubber adhesives, synthetic rubber adhesives, acrylic resin adhesives, polyester resin adhesives, and polyvinyl ether resin adhesives. Agents, urethane resin adhesives, silicone resin adhesives, and the like, and acrylic resin adhesives are preferred.
Moreover, you may provide a peeling agent layer also on the surface on the opposite side to the adhesive layer 12 of the adhesive tape 10 for reinforcement as needed.

  Specific examples of the synthetic rubber pressure-sensitive adhesive include styrene-butadiene rubber, polyisobutylene rubber, isobutylene-isoprene rubber, isoprene rubber, styrene-isoprene block copolymer, styrene-butadiene block copolymer, styrene-ethylene-butylene block. Examples thereof include copolymers and ethylene-vinyl acetate thermoplastic elastomers. Specific examples of the acrylic resin-based adhesive include acrylic acid, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, acrylonitrile Homopolymers or copolymers such as The polyester resin-based adhesive is a copolymer of a polyhydric alcohol and a polybasic acid. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, and butanediol. Polybasic acids include terephthalic acid and adipic acid. And maleic acid. Specific examples of the polyvinyl ether resin pressure-sensitive adhesive include polyvinyl ether and polyvinyl isobutyl ether. Specific examples of the silicone resin-based pressure-sensitive adhesive include dimethylpolysiloxane. These pressure-sensitive adhesives can be used alone or in combination of two or more.

  The pressure-sensitive adhesive layer 12 may contain a tackifier, a softener, an anti-aging agent, a filler, a coloring agent such as a dye or a pigment, and the like as necessary. Examples of the tackifier include rosin resin, terpene phenol resin, terpene resin, aromatic hydrocarbon-modified terpene resin, petroleum resin, coumarone / indene resin, styrene resin, phenol resin, xylene resin and the like. Examples of the softener include process oil, liquid rubber, and plasticizer. Examples of the filler include silica, talc, clay, calcium carbonate and the like.

Also, the adhesive force of the adhesive layer 12 of the reinforcing adhesive tape 10 to the release agent layer 8 of the flexible adhesive tape 6 is such that the flexible adhesive tape 6 and the reinforcing adhesive tape 10 are bonded together by a 2 kg roller and immediately after the bonding. In addition, the adhesive force when the reinforcing adhesive tape 10 is peeled off at a speed of 300 mm / min in the direction of 180 ° with respect to the flexible adhesive tape 6 is preferably 2.0 to 20.0 N / 25 mm, More preferably, it is 3.0 to 15.0 N / 25 mm.
Further, the adhesive force of the adhesive layer 12 of the reinforcing adhesive tape 10 to the release agent layer 8 of the flexible adhesive tape 6 is such that the silicone adhesive layer 9 of the flexible adhesive tape 6 to the release agent layer 3 of the release sheet 1. It is preferably 1.5 times or more, more preferably 2 to 5 times, and even more preferably 2 to 3.5 times the adhesive strength.
As for the thickness of the adhesive layer 12, 1-100 micrometers is preferable normally, and 1-50 micrometers is especially preferable.

The reinforcing adhesive tape 10 is bonded to the surface of the flexible adhesive tape 6 opposite to the silicone adhesive layer 9 with a gap from the leading edge of the release sheet 1 of the flexible adhesive tape 6 in the feeding direction. Is done .
Interval to open the feed-out direction of the leading edge release sheet 1 of flexible adhesive tape 6 is 1 to 5 mm, more preferably 1.5 to 4 mm, 1.5 to 3 mm being most preferred. Thereby, the thickness of the front-end | tip part of the delivery direction of the peeling sheet 1 can be made thinner than the thickness of a center part.

As shown in FIG. 1, the end edge in the feeding direction of the release sheet 1 of the reinforcing pressure-sensitive adhesive tape 10 is bonded to the end edge in the feeding direction of the release sheet 1 of the flexible pressure-sensitive adhesive tape 6. Those are preferred.
The interval opened from the end edge in the feeding direction of the release sheet 1 of the flexible adhesive tape 6 is preferably 1 mm or more, more preferably 1 to 5 mm, still more preferably 1.5 to 4 mm, and more preferably 1.5 to 3 mm. Most preferred. Thereby, the thickness of the terminal part of the peeling direction of the peeling sheet 1 can be made thinner than the thickness of the center part. In this case, the object of the present invention can be achieved even if the feeding direction of the release sheet is changed to the opposite direction.
In addition, as shown in FIG. 2, the end edge in the feeding direction of the release sheet 1 of the reinforcing adhesive tape 10 may be the same as the end edge in the sending direction of the release sheet 1 of the flexible adhesive tape 6, As shown in FIG. 3, the flexible adhesive tape 6 may protrude from the end edge in the feeding direction of the release sheet 1 and may be bonded to the surface of the release agent layer of the release sheet 1.

The connecting method of the release sheet 1 of the present invention is to butt the ends of each release sheet 1 so that the silicone release agent layer 3 for sticking the adhesive sheet of each release sheet 1 to be connected is on the same surface, The bonding adhesive tape 5 is bonded to the surface of each silicone release agent layer 3 across the butted end portions 13 on the surface of the silicone adhesive layer.
The bonding adhesive tape 5 may be bonded after the ends of the release sheets 1 are abutted with each other, or the bonding adhesive is bonded to the silicone release agent layer 3 at the end of one release sheet 1. After pasting a part of the tape 5, the end of the other release sheet 1 is faced to the end, and the remaining part of the adhesive tape 5 for bonding is attached to the end of the other release sheet 1. You may carry out by bonding to the silicone type release agent layer 3. FIG.

When the ends of each release sheet 1 are brought into contact with each other, it is preferable that the ends are brought into contact with each other. However, as shown in FIG.
In FIG. 4, the front release sheet 1 is superimposed on the surface of the rear release sheet 1 with respect to the traveling direction of the release sheet 1 of the connection adhesive tape 5. If the rear release sheet 1 is overlapped on the surface of the previous release sheet 1 with respect to the traveling direction of the previous release sheet 1, the overlapped portion of the rear release sheet 1 may be turned over during the process, causing trouble. Therefore, the superposition method shown in FIG. 4 is preferable.
Further, the bonding length in the direction perpendicular to the traveling direction of the release sheet 1 of the connecting adhesive tape 5 is preferably the same length as each release paper sheet.
By connecting the release sheets 1 in this way, labeling can be performed without any trouble such as bending, entrainment, or peeling during processing of the labeling machine.

Hereinafter, the present invention will be described in more detail with reference to examples. In addition, this invention is not restrict | limited at all by these examples.
The performance evaluation of the release sheet 1 obtained in the example of the present invention or the comparative example was performed by the following method.

Evaluation of adhesion Adhesiveness is evaluated by attaching and driving the release sheet 1 with the adhesive sheet affixed at a predetermined interval to the labeling machine, driving it, and confirming the presence or absence of adhesion between the outermost surface of the adhesive tape for bonding and the adhesive surface of the double-sided adhesive sheet did.
The adhesiveness was evaluated according to the following criteria.
○: The connecting pressure-sensitive adhesive tape and the double-sided pressure-sensitive adhesive sheet operated without bonding.
X: The adhesive tape for joining and the double-sided adhesive sheet adhered, and the apparatus stopped.

(2) Bending evaluation The peeling sheet 1 on which adhesive sheets were attached at predetermined intervals was attached to a labeling machine and driven, and the bending was evaluated by checking whether or not the adhesive tape for bending had been bent.
The bending was evaluated according to the following criteria.
○: The connection portion was operated without bending.
X: Bending occurred at the connecting portion.

(3) Entrainment evaluation The release sheet 1 on which the adhesive sheet was attached at a predetermined interval was attached to a labeling machine and driven, and the entrainment was evaluated by confirming whether or not the joining portion was entrained in the apparatus.
Entrainment was evaluated according to the following criteria.
○: Operation was performed without involving the joining portion.
X: Entrainment of the connecting portion occurred.

(4) Peeling evaluation The peeling sheet 1 with the adhesive sheet attached at a predetermined interval is attached to a labeling machine and driven, and the peeling is evaluated by checking whether or not the adhesive tape for joining is peeled off when the joining part passes through the peel plate. did.
The peeling was evaluated according to the following criteria.
○: The adhesive adhesive tape passed through the peel plate without peeling off.
X: The adhesive tape for connection peeled off and passed through the peel plate.

Example 1
(1) Manufacture of adhesive tape for connection A base material 7 made of polyethylene terephthalate resin (bending elastic modulus 1.8 × 10 ⁻⁵ N · m) has a silicone adhesive layer 9 on one side and a silicone type on the other side. A flexible adhesive tape 6 was prepared by cutting a silicone adhesive tape having a release agent layer 8 (manufactured by Sony Chemical Information Device Co., Ltd., trade name “T4082”, total thickness 60 μm) into a length of 38 mm and a width of 21 mm. Separately, an acrylic resin-based adhesive layer 12 (manufactured by Lintec Corporation) on one surface of a polyethylene terephthalate resin base material 11 (thickness 50 μm, width 21 mm, flexural modulus 4.2 × 10 ⁻⁵ N · m). A reinforcing pressure-sensitive adhesive tape 10 was prepared by cutting an acrylic pressure-sensitive adhesive tape having a trade name “PA-T1” and a thickness of 30 μm into a length of 34 mm and a width of 21 mm.

Then, the reinforcing adhesive tape 10 is attached to the acrylic resin-based adhesive layer so that the both ends of the flexible adhesive tape 6 in the length direction are not covered on the surface of the silicone-based release agent layer 8 of the flexible adhesive tape 6. The adhesive tape 5 for joining was produced by bonding on the surface of 12. As shown in FIG. 1, the obtained adhesive tape 5 for connecting the reinforcing adhesive tape 10 is formed of the flexible adhesive tape 6 at intervals of 2 mm from both ends in the length direction of the flexible adhesive tape 6. It was stuck on the surface of the silicone release agent layer 8.
The adhesive force of the silicone adhesive layer of the flexible adhesive tape 6 to the silicone release agent layer 3 of the release sheet 1 is such that the release sheet 1 and the flexible adhesive tape 6 are bonded together with a 2 kg roller and immediately after the bonding, When the adhesive tape 6 was peeled off from the release sheet 1 in the direction of 180 ° at a speed of 300 mm / min, it was 2.5 N / 25 mm.

(2) Bonding method of release sheet A roll provided with a double-sided pressure-sensitive adhesive sheet 14 having a pressure-sensitive adhesive layer 16 and a pressure-sensitive adhesive layer 17 on both sides of a double-sided pressure-sensitive adhesive sheet core 15 on the heavy-peelable release agent layer 3 of the release sheet 1 Sheet-like double-sided pressure-sensitive adhesive sheet (product name “Double-sided tack label LTC-NTV100 series”, release sheet width 21 mm, pressure-sensitive adhesive sheet width 17 mm, pressure-sensitive adhesive sheet length 21 mm, rectangular) manufactured by Lintec Co., Ltd. did.
Next, the end portions of each release sheet 1 are butted in series so that the heavy-peelable release agent layer 3 of the release sheet 1 is on the same side, and the end portions 13 are straddled. Then, five adhesive tapes 5 for bonding were bonded to the surface of each heavy peelable release agent layer 3 on the surface of the silicone adhesive layer, and the release sheet 1 was connected. When the adhesive tape for joining and the adhesive sheet overlap, the adhesive sheet was peeled off, and the adhesive tape for joining was attached to the release sheet.
The obtained release sheet 1 with the pressure-sensitive adhesive sheet was wound up in a roll shape, applied to a labeling machine, and evaluated by the above evaluation method. The five connecting portions are set as connecting positions 1, 2, 3, 4, 5 from the head in the feeding direction to the labeling machine. The results are shown in Table 1.

(Comparative Example 1)
Example 1 except that a silicone-based adhesive tape (Sony Chemical Information Device Co., Ltd., trade name “T4082”, total thickness 60 μm) cut to a length of 38 mm and a width of 21 mm was used as the adhesive tape 5 for connection. Then, the connecting method of the release sheet 1 was performed. Using the obtained release sheet 1, it was applied to a labeling machine and evaluated by the above evaluation method. The results are shown in Table 1.

(Comparative Example 2)
The connecting adhesive tape 5 is the same as the flexible adhesive tape 6 with the size of the reinforcing adhesive tape 10 being the same as that of the flexible adhesive tape 6, except that the adhesive tape for bonding is used so that both adhesive tapes overlap completely. In the same manner as in Example 1, the joining method of the release sheet 1 was performed. Using the obtained release sheet 1, it was applied to a labeling machine and evaluated by the above evaluation method. The results are shown in Table 1.

(Comparative Example 3)
A silicone adhesive tape (product name “T4082”, manufactured by Sony Chemical Information Device Co., Ltd.) cut to a length of 38 mm and a width of 21 mm is used as the adhesive tape 5 for connection. The joining method of the release sheet 1 was performed in the same manner as in Example 1 except that joining was performed for both of the release agent layers 4. Using the obtained release sheet 1, it was applied to a labeling machine and evaluated by the above evaluation method. The results are shown in Table 1.

FIG. 1 is an example of a method for joining release sheets of the present invention, and is a cross-sectional view showing a state in which end portions of two release sheets are bonded with an adhesive tape for joining. FIG. 2 is a cross-sectional view showing another example of the connecting method of the release sheets of the present invention, in which the end portions of the two release sheets are bonded with a connecting adhesive tape. FIG. 3 is a cross-sectional view showing another example of the method for joining release sheets of the present invention, in which the ends of two release sheets are bonded together with an adhesive tape for joining. FIG. 4 is a cross-sectional view showing another example of the connecting method of the release sheets of the present invention, in a state where the end portions of the two release sheets are overlapped and bonded with a connecting adhesive tape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Release sheet 2 Base sheet 3 Heavy release release agent layer 4 Light release release agent layer 5 Bonding adhesive tape 6 Flexible adhesive tape 7 Base material 8 Release agent layer 9 Silicone adhesive layer 10 Reinforcing adhesive tape 11 Base material 12 Adhesive layer 13 Abutted end portion 14 Double-sided adhesive sheet 15 Double-sided adhesive sheet core material 16 Adhesive layer 17 Adhesive layer A Release direction of release sheet

Claims (12)

When connecting release sheets having a release agent layer on at least one side of the base sheet, the ends of the release sheets are butted or overlapped so that the surfaces of the release agent layers of the release sheets face the same direction. combined, said across the end the combined end or overlapped with butting on the surface of the release agent layer of each release sheet, the flexibility adhesive tape of the silicone adhesive to have a silicone adhesive layer on one side of the substrate A release sheet in which a reinforcing adhesive tape is bonded to the surface opposite to the agent layer at a distance of 1 to 5 mm in the delivery direction from the leading edge in the delivery direction of the release sheet of the flexible adhesive tape. A joining method for a release sheet, wherein a bonding adhesive tape having a thickness at the tip in the feeding direction thinner than that at the center is bonded on the surface of the silicone pressure-sensitive adhesive layer. The reinforcing pressure-sensitive adhesive tape is attached to a labeling machine with a pressure-sensitive adhesive sheet roll obtained by continuously sticking the pressure-sensitive adhesive sheet to the release agent surface of the release sheet at a predetermined interval and winding it into a roll. Claims that are continuously peeled off and peeled off at the peel plate part of the labeling machine when the adhesive sheet is peeled off and stuck on the product that is continuously fed out. 2. A method for joining release sheets according to 1. The base material of the reinforcing adhesive tape has a flexural modulus of 3.0 × 10 ^-5 N · m ～ 3.5 × 10 ^-4 It is N * m, The connection method of the peeling sheet of Claim 1 or 2. The adhesive force of the pressure-sensitive adhesive layer of the reinforcing pressure-sensitive adhesive tape to the release agent layer of the flexible pressure-sensitive adhesive tape is larger than the adhesive force of the silicone pressure-sensitive adhesive layer of the flexible pressure-sensitive adhesive tape to the release agent layer of the release sheet. It is 1.5 times or more, The joining method of the peeling sheet in any one of Claims 1-3. The method for joining release sheets according to any one of claims 1 to 4, wherein the release sheet, the flexible adhesive tape, and the reinforcing adhesive tape all have the same width. The release sheet joining method according to any one of claims 1 to 5, wherein the release sheet release agent is a silicone release agent. The connecting method of a release sheet according to any one of claims 1 to 6 , wherein the release sheet has a silicone release agent layer on both sides of the base sheet. The reinforcing adhesive tape bonded to the surface of the flexible pressure-sensitive adhesive tape is bonded with an interval in the direction opposite to the feeding direction from the end edge in the feeding direction of the release sheet of the flexible pressure-sensitive adhesive tape. The joining method of the peeling sheet in any one of Claims 1-7 . The joining method of the release sheet according to any one of claims 1 to 8 , wherein the flexible adhesive tape is provided with a silicone-based adhesive layer on one surface of a substrate and a release agent layer on the other surface. . The joining method of the peeling sheet in any one of Claims 1-9 with which the adhesive tape for reinforcement is provided with the acrylic resin-type adhesive layer in the one surface of a base material. In joining adhesive tape for use in connecting a release sheet together, on the surface opposite to the flexible adhesive tape the silicone based pressure-sensitive adhesive layer to have a silicone adhesive layer on one side of the substrate, said softer The thickness of the leading edge of the peeling sheet in the feeding direction is the center of the peeling sheet , and the reinforcing adhesive tape is pasted at a distance of 1 to 5 mm in the feeding direction from the leading edge of the peeling sheet in the feeding direction. Adhesive tape for joining, characterized by being thinner than the thickness. The reinforcing pressure-sensitive adhesive tape is attached to a labeling machine with a pressure-sensitive adhesive sheet roll obtained by continuously sticking the pressure-sensitive adhesive sheet to the release agent surface of the release sheet at a predetermined interval and winding it into a roll. Claims that are continuously peeled off and peeled off at the peel plate part of the labeling machine when the adhesive sheet is peeled off and stuck on the product that is continuously fed out. The adhesive tape for connection according to 11.

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