JP2013072021A - Laminated sheet and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated sheet that is prevented from a press mark on an adhesive sheet even if a rolling pressure is applied when the sheet is rolled and to provide a method of manufacturing the same.SOLUTION: The laminated sheet L comprises: a beltlike release sheet RL; a circular adhesive sheet S laminated on one surface of the release sheet RL with a predetermined interval in the longitudinal direction; and a contact-preventing member CP formed on one surface of the release sheet RL and laminated on a different position from the adhesive sheet S. The contact-preventing member CP is formed in a beltlike shape, is equipped with a hole CH corresponding to the whole area of the outer periphery of the adhesive sheet S, and is laminated on the release sheet RL with a predetermined interval in the longitudinal direction so as not to overlap with the adhesive sheet S.

Description

  The present invention relates to a laminated sheet and a method for producing the same.

When a laminated sheet provided with adhesive sheets at a constant interval is used as a winding body, the winding diameter of the winding body gradually increases. For this reason, the adhesive sheet does not completely overlap with the adhesive sheet that is located before the first roll, that is, the nearest inside, or the adhesive sheet that is located after the first roll, that is, the nearest outside. With a gap. As a result, a winding pressure is applied to the laminated sheet when it is taken up, so that the adhesive sheet is stamped by the edge of the adhesive sheet located on the nearest inner side or the nearest outer side.
Therefore, a laminated sheet is used in which a protective material having a thickness larger than that of the adhesive sheet is laminated on a release sheet obtained by laminating an adhesive sheet having a predetermined shape at a position different from the adhesive sheet (see, for example, Patent Document 1). .

  The laminated sheet described in Patent Document 1 includes a release sheet, an adhesive sheet continuously provided at a central portion in the width direction of the release sheet, and a protective material provided on both sides of the release sheet in the width direction. And. Since this laminated sheet is formed by laminating a protective material having a thickness larger than that of the adhesive sheet on the release sheet, the adhesive sheet and the release sheet that overlaps the adhesive sheet (hereinafter referred to as the outer release sheet) are used as the wound body. ), A gap having a height corresponding to the difference in thickness between the protective material and the adhesive sheet is formed. Therefore, such a laminated sheet can prevent the adhesive sheet from being stamped with an overlap shift.

JP 2004-35836 A

  However, in the laminated sheet described in Patent Document 1, since the protective material is not provided in the central portion in the short width direction of the release sheet, when the winding pressure is applied as a winding body, Therefore, there is a possibility that the adhesive sheet may be stamped by the edges of the adhesive sheet located on the nearest inner side and the nearest outer side.

  An object of the present invention is to provide a laminated sheet and a method for producing the same, which can prevent the adhesive sheet from being pressed even when a winding pressure is applied to the wound body.

  In order to achieve the above object, a laminated sheet of the present invention comprises a strip-shaped release sheet, an adhesive sheet having a predetermined shape laminated at a predetermined interval in the longitudinal direction of one surface of the release sheet, and a release sheet. A laminated sheet that is provided on one surface and includes a contact prevention member laminated at a different position from the adhesive sheet, wherein the contact prevention member is thicker than the adhesive sheet, A configuration is adopted in which holes corresponding to the entire outer periphery are provided.

  At this time, the adhesive sheet is formed by an inner side of a closed loop-shaped cut formed on a strip-shaped raw adhesive sheet laminated on one surface of the release sheet, and the contact prevention member is formed on the outer side of the cut. It may be formed on an unnecessary sheet formed in the above.

  Further, when the laminated sheet is a winding body, the hole is formed by the contact preventing member and the adhesive sheet on the release sheet contacting the other surface on the contact preventing member. It is preferable that they are formed in a shape that does not overlap visually.

  On the other hand, in the method for producing a laminated sheet of the present invention, the adhesive sheet having a predetermined shape is unrolled at a predetermined interval in the longitudinal direction of one surface of the strip-shaped release sheet, and the thickness is larger than that of the adhesive sheet. Is adopted, and a configuration is adopted in which holes corresponding to the entire outer periphery of the adhesive sheet are provided.

  Further, another method for producing a laminated sheet of the present invention is to feed out an original fabric in which a strip-shaped original adhesive sheet is laminated on a strip-shaped release sheet, and form a closed-loop cut in the original fabric original adhesive sheet, A configuration in which an adhesive sheet is formed on the inner side of the notch, an unnecessary sheet is formed on the outer side, and a contact prevention member having holes corresponding to the entire outer periphery of the adhesive sheet is formed on the unnecessary sheet. Adopted.

  According to the present invention as described above, the contact preventing member is thicker than the adhesive sheet and has holes corresponding to the entire outer periphery of the adhesive sheet. By not being provided in the central portion in the direction, it is possible to prevent the adhesive sheet from being pressed by the edge of the adhesive sheet located in the nearest inner side or the nearest outer side located in the central portion in the width direction.

  At this time, if the contact preventing member is formed on the unnecessary sheet positioned outside the cut forming the adhesive sheet, the contact preventing member is formed by reducing the thickness in the direction perpendicular to the surface of the release sheet. It is possible to suppress wasteful consumption of the material forming the contact prevention member.

  In addition, when the laminated sheet is a winding body, the hole prevents the contact preventing member and the adhesive sheet laminated on the release sheet contacting the other surface on the contact preventing member from overlapping in a plan view. If formed into a shape, the adhesive sheet does not overlap the contact prevention member located on the innermost side and the outermost side of the winding body due to the overlap displacement when the laminated sheet is a winding body, and the winding pressure is not When added, it is possible to prevent the adhesive sheet from being pressed by the edge of the contact preventing member. Here, the hole may be formed so that the adhesive sheet does not overlap at least the contact prevention member located on the nearest inner side and the nearest outer side.

The perspective view of the lamination sheet which concerns on embodiment of this invention. The fragmentary sectional view when using the laminated sheet of FIG. 1 as a winding body. Schematic of the manufacturing apparatus which manufactures the lamination sheet of FIG. The top view of the lamination sheet which concerns on the modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
When the laminated sheet is a winding body, the laminated sheet portion located on the nearest inner side of the reference laminated sheet portion is called an inner laminated sheet, and the laminated sheet portion located on the nearest outer side is called an outer laminated sheet. And each layer and member which comprise these inner side laminated sheets or outer side laminated sheets may also be described by giving an inner or outer name.

  As shown in FIG. 1, the laminated sheet L in the present embodiment includes a strip-shaped release sheet RL, and a circular adhesive sheet S laminated at a predetermined interval in the longitudinal direction of one surface of the release sheet RL. The contact prevention member CP is provided on one surface of the release sheet RL and laminated at a different position from the adhesive sheet S.

The adhesive sheet S includes a base sheet BS and an adhesive layer AD provided on one surface of the base sheet BS. In the present embodiment, the base sheet BS has a thickness of 50 μm and is made of a resin such as olefin such as polyethylene, and the adhesive layer AD has a thickness of 20 μm and is made of an acrylic pressure-sensitive adhesive.
The release sheet RL has a thickness of 38 μm, and non-adhesive treatment such as silicone treatment is performed on one surface of a resin such as polyethylene terephthalate.
The contact prevention member CP is formed in a band shape, has holes CH corresponding to the entire outer periphery of the adhesive sheet S, and is laminated on the release sheet RL at a predetermined interval in the longitudinal direction so as not to overlap the adhesive sheet S. . As shown in FIG. 2, the contact preventing member CP is formed of a resin layer having a thickness larger than that of the adhesive sheet S, and the thickness thereof is set to 150 μm.
As the contact prevention member CP, a resin layer that can be cured by fixing energy such as hot air, ultraviolet rays, infrared rays, microwaves, cold air, natural air, or the like composed of resin, varnish, printing ink, or the like can be used.

As shown in FIG. 2, when the laminated sheet L is a wound body, the outer laminated sheet L1 is overlapped on the contact prevention member CP. In this embodiment, the outer peeled sheet RL1 and the adhesive sheet S A gap H having a height of 80 μm is formed therebetween. FIG. 2 is a partial cross-sectional view of the laminated sheet L as a winding body from the winding center axis direction of the winding body, but the laminated sheet L is shown flat for easy understanding. In such a wound body, it receives the winding pressure toward the radially inner side (lower side in FIG. 2) of the wound body, but the contact prevention member CP is formed corresponding to the entire outer periphery of the adhesive sheet S. It is possible to prevent the adhesive sheet S from being damaged by the edges of the inner adhesive sheet S2 and the outer adhesive sheet S1.
In addition, when the laminated sheet L is a winding body, the hole CH is formed so that the adhesive sheet S has the inner contact prevention member CP2 The outer contact preventing member CP1 is formed in a shape that does not overlap in plan view. Thereby, even if the winding pressure is applied to the laminated sheet L and the release sheet RL is deformed radially inward, the edges of the inner contact prevention member CP2 and the outer contact prevention member CP1 are not pressed against the adhesive sheet S. It is possible to prevent the adhesive sheet S from being pressed.

Next, the manufacturing method of the lamination sheet L is demonstrated.
As shown in FIG. 3, in the sheet manufacturing apparatus 1, a strip-shaped raw adhesive sheet S0 having an adhesive layer AD having a thickness of 20 μm on one surface of a base sheet BS having a thickness of 50 μm has a thickness through the adhesive layer AD. Feeding means 10 for feeding out the original fabric R1 temporarily attached to the 38 μm release sheet RL, cutting means 20 for forming a cut CU in the original adhesive sheet S0, winding means 30 for winding up the unnecessary sheet S3, and adhesive sheet The contact prevention member forming means 40 for forming the contact prevention member CP having a thickness of 150 μm larger than the thickness of S and corresponding to the entire outer periphery of the adhesive sheet S is fixed, and the formed contact prevention member CP is fixed to form the laminated sheet L. A fixing unit 50 and a collecting unit 60 for collecting the laminated sheet L are provided.

  The feeding means 10 winds and supports the original fabric R1 in a roll shape, and guides and drives the support roller 12 driven by a rotation motor 11 as a driving device, and the original fabric R1 fed from the support roller 12. A driving roller 14 that is driven by a rotation motor 13 as a device, and a pinch roller 15 that sandwiches the original fabric R1 between the driving roller 14 are provided.

  The cutting means 20 is disposed opposite to the die cut roller 22 having a die cutting roller 22 having a cutting blade 21 for forming a closed loop cut CU in the original adhesive sheet S0, and the original adhesive sheet S0 and the release sheet RL. The platen roller 23 is provided. The cutting blade 21 forms a cut CU having a depth that penetrates the adhesive layer AD and does not penetrate the release sheet RL from the base sheet BS side, and forms a circular adhesive sheet S inside the cut CU. At the same time, a strip-shaped unnecessary sheet S3 is formed outside the cut CU. The die-cut roller 22 and the platen roller 23 are provided so as to be rotatable in synchronization with a rotation motor 24 and a rotation motor 25 as drive devices. The cutting blade 21 is preferably subjected to non-adhesion treatment such as a fluororesin coating so that the adhesive of the original adhesive sheet S0 does not adhere.

  The winding means 30 includes a peeling roller 31 that peels the unnecessary sheet S3 from the peeling sheet RL, a pinch roller 32 that is disposed opposite to the peeling roller 31 with the original fabric R1 interposed therebetween, and a rotation motor as a driving device. And a take-up roller 33 that is provided so as to be rotatable by the take-up roller 34 and winds up the unnecessary sheet S3 peeled off by the peel roller 31.

The contact prevention member forming means 40 is a rotary screen printing machine, and is provided above the adhesive sheet S conveyed in the right direction in FIG. 3, and is provided so as to be rotatable by a rotation motor 41 as a driving device. 42, a squeegee (not shown), and an impression cylinder 44 that is disposed to face the plate cylinder 42 with the release sheet RL interposed therebetween and is rotatably provided by a rotation motor 43 as a drive device. The contact preventing member forming means 40 is configured to push out ink stored in the plate cylinder 42 with a squeegee.
The contact prevention member CP is formed so as to surround the adhesive sheet S by the hole CH so as not to overlap the adhesive sheet S. As a method of printing the ink except for a part in this way, a plate designed so that the ink does not pass on the adhesive sheet S and the ink passes only on the outer printed portion of the adhesive sheet S is prepared. Then, the ink is spread on this plate and extruded with a squeegee to print. By using such a printing method, the contact preventing member CP can be easily laminated only on a predetermined portion of the release sheet RL.

  The fixing unit 50 is provided above the adhesive sheet S conveyed in the right direction in FIG. 3 and on the right side of the plate cylinder 42, and fixes the contact prevention member CP on the release sheet RL. Depending on the characteristics of the ink to be constituted, those that generate fixing energy such as hot air, ultraviolet light, infrared light, microwave, cold air, natural air, etc. can be employed.

  The collection means 60 includes a drive roller 62 that is rotatably provided by a rotation motor 61 as a drive device, a pinch roller 63 that is disposed opposite to the drive roller 62 with the laminated sheet L interposed therebetween, and a rotation as a drive device. A collection roller 65 that is rotatably provided by the motor 64 and collects the laminated sheet L is provided.

  In the above sheet manufacturing apparatus 1, as a procedure for manufacturing the laminated sheet L, first, as shown in FIG. 3, the raw fabric R <b> 1 is set on the support roller 12, and between the driving roller 14 and the pinch roller 15, It passes between the die cut roller 22 and the platen roller 23 and between the peeling roller 31 and the pinch roller 32. The original adhesive sheet S0 is fixed to the take-up roller 33, and the release sheet RL is passed between the plate cylinder 42 and the impression cylinder 44, between the drive roller 62 and the pinch roller 63, and fixed to the collection roller 65. Keep it.

  In this state, the rotation motors 11, 13, 24, 25, 34, 41, 43, 61, 64 are driven synchronously, and the support roller 12, the drive roller 14, the die cut roller 22, the platen roller 23, and the take-up roller are driven. 33, the plate cylinder 42, the impression cylinder 44, the drive roller 62, and the collection roller 65 are rotated to feed the original fabric R1 to the right in FIG.

  When the original fabric R1 passes between the die cut roller 22 and the platen roller 23, the cutting blade 21 forms the cut CU in the original adhesive sheet S0, and the adhesive sheet S is formed inside the cut CU. At the same time, an unnecessary sheet S3 is formed outside the cut CU. Thereafter, the unnecessary sheet S3 is guided by the peeling roller 31 and taken up by the take-up roller 33, and the adhesive sheet S is laminated with a predetermined interval in the longitudinal direction of the peeling sheet RL with the original fabric R2. Then, it is conveyed between the plate cylinder 42 and the impression cylinder 44.

  When the original fabric R2 passes between the plate cylinder 42 and the impression cylinder 44, the contact preventing member CP is printed on the release sheet RL. Then, the fixing unit 50 applies fixing energy such as hot air to the contact prevention member CP, whereby the contact prevention member CP is fixed on the release sheet RL, and the laminated sheet L is formed. The laminated sheet L is collected by the collection roller 65 through the space between the driving roller 62 and the pinch roller 63.

  According to the embodiment as described above, since the contact prevention member CP is formed corresponding to the entire outer periphery of the adhesive sheet S, the adhesive sheet S and the outer release sheet RL1 when the laminated sheet L is a winding body. A gap H having a height of 80 μm is formed between the two. Therefore, like patent document 1, it is the center part of the width direction in lamination sheet L, Comprising: The inconvenience that an adhesive sheet S is marked by the edge of inner side adhesive sheet S2 and outer side adhesive sheet S1 is eliminated. can do.

As described above, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations. In addition, the description of the shape, material, and the like disclosed above is exemplary for ease of understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

For example, as shown in FIG. 4, the hole CH may be an oval hole. Such an ellipse is formed on the both sides in the longitudinal direction of the laminated sheet L with the adhesive sheet S as a reference, with a predetermined interval CD, and two circles having the same diameter as the adhesive sheet S are adhesive sheets. What is necessary is just to be connected by two parallel lines of the same width as the diameter width of S. Here, the predetermined interval CD is an overlap prevention interval. The diameter of the two circles forming the ellipse and the width of the two parallel lines may be equal to or larger than the diameter of the adhesive sheet S.
By forming such an oval hole CH, the adhesive sheet S does not overlap the inner contact prevention member CP2 and the outer contact prevention member CP1 even if the overlap shift G occurs, and the adhesive sheet S is pressed. Marking can be prevented. In addition, the predetermined space | interval in the two circles which comprise the hole CH should just be set to 2 times or more of the overlap gap G.
As a method for manufacturing such a laminated sheet L, the contact preventing member forming means 40 capable of forming the hole CH in the sheet manufacturing apparatus 1 may be employed.

In the embodiment, the contact prevention member CP is stacked on the release sheet RL from which the unnecessary sheet S3 is removed. However, the contact prevention member CP may be stacked on the unnecessary sheet S3 without removing the unnecessary sheet S3. Good. Thus, by laminating the contact prevention member CP on the unnecessary sheet S3, for example, the thickness of the contact prevention member CP only needs to be 80 μm in order to form the same gap H as in the above embodiment. Compared to the above, wasteful consumption of the material forming the contact prevention member CP can be suppressed.
Furthermore, the contact preventing member CP may be formed intermittently without being formed in a strip shape in the extending direction of the laminated sheet L.

In addition, the types and materials of the original adhesive sheet S0 and the adhesive sheet S in the present invention are not particularly limited. For example, those having an intermediate layer between the base sheet BS and the adhesive layer AD, and other layers Three or more layers such as those having Further, the shape of the adhesive sheet S or the hole CH can be an arbitrary shape such as a polygon such as a triangle or a quadrangle, an ellipse, or the like other than a circle.
Furthermore, as the contact preventing member forming means 40 for forming the contact preventing member CP, in addition to the rotary screen printing machine, a solvent coating method, gravure printing, screen printing, further, letterpress printing, intaglio printing, planographic printing, stencil printing, etc. Any printing method can be employed, and the printing method is not limited as long as ink can be printed.

  The drive device in the embodiment includes an electric device such as a rotation motor, a linear motion motor, a linear motor, a single axis robot, an articulated robot, an actuator such as an air cylinder, a hydraulic cylinder, a rodless cylinder, and a rotary cylinder. In addition to these, a combination of them directly or indirectly may be employed (some of them overlap with those exemplified in the embodiment).

L Laminated sheet RL Release sheet S Adhesive sheet CD Overlap prevention interval CP Contact prevention member S3 Unnecessary sheet S0 Original adhesive sheet CU Cut CH Hole R1 Original fabric

Claims (5)

A strip-shaped release sheet, an adhesive sheet having a predetermined shape laminated at a predetermined interval in the longitudinal direction of one surface of the release sheet, and a position different from the adhesive sheet provided on one surface of the release sheet A laminated sheet comprising a contact prevention member laminated on
The contact prevention member is thicker than the adhesive sheet, and has a hole corresponding to the entire outer periphery of the adhesive sheet. The adhesive sheet is formed by the inside of a closed loop-shaped cut formed in a strip-shaped original adhesive sheet laminated on one surface of the release sheet,
The laminated sheet according to claim 1, wherein the contact prevention member is formed on an unnecessary sheet formed outside the notch.   In the hole, the contact prevention member and the adhesive sheet on the release sheet with which the other surface comes into contact with the contact prevention member when the laminated sheet is a winding body are seen in a plan view of the adhesive sheet. The laminated sheet according to claim 1 or 2, wherein the laminated sheet is formed in a shape that does not overlap. Feed out the original fabric in which the adhesive sheet of a predetermined shape is laminated at a predetermined interval in the longitudinal direction of one surface of the strip-shaped release sheet,
A method for producing a laminated sheet, comprising: forming a contact prevention member having a thickness larger than that of the adhesive sheet and having holes corresponding to the entire outer periphery of the adhesive sheet. Feed out the original fabric in which the strip-shaped release sheet is laminated to the strip-shaped release sheet,
Forming a closed-loop cut in the original fabric original sheet, forming an adhesive sheet on the inside of the cut, and forming an unnecessary sheet on the outside,
A method for producing a laminated sheet, comprising: forming a contact preventing member having holes corresponding to the entire outer periphery of the adhesive sheet on the unnecessary sheet.

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