KR20210132119A - Slitting device, slitting method and laminated tape - Google Patents

Abstract

Between the bladed roll 10 and the anvil roll 20 in which a plurality of disk-shaped slit blades 11 are formed at a pitch of 0.5 mm or less, the adhesive layer 32 can be peeled from the base film 31 The laminated film 30 and the carrier film 4, which are laminated so as to be laminated, are passed through overlapping the laminated film 30 as the bladed roll side 10, and the laminated film 30 is slit by a score cut method. . The blade angle of this slit blade 11 is set to 30 degrees or less. Thereby, the laminated|multilayer film by which the adhesive layer is laminated|stacked on the base film so that a base film and an adhesive layer may not peel, and protrusion of an adhesive layer may also not generate|occur|produce, and it slits to 0.5 mm or less of tape width.

Description

Slitting device, slitting method and laminated tape

This invention relates to the slit apparatus of the laminated|multilayer film by which the adhesion layer is laminated|stacked on the base film so that peeling is possible, the slit method, and the laminated|multilayer tape obtained by the slit of laminated|multilayer film.

A long laminated tape in which an adhesive layer is laminated on a base film so that peeling is possible is used as a transfer ribbon or the like for transferring a figure, a character, or the like to an article (Patent Document 1). Such a laminated tape is manufactured by slitting the laminated|multilayer film by which the adhesion layer is laminated|stacked on the base film so that peeling is possible.

The elongate laminated tape in which the adhesive layer is laminated|stacked so that peeling is possible on the base film is used also as an adhesive material at the time of mounting an electronic component on a board|substrate, and a thin laminated tape is needed in recent years. However, when the laminated|multilayer film by which the adhesion layer is laminated|stacked on a base film so that peeling is possible is slit narrowly, the problem that a base film and an adhesion layer will peel by a slit will arise. Regarding this, there is a large-scale method in which the entire apparatus for slitting the laminated film is covered with a hood in a share-cut method using a disk-shaped upper and lower blade, and temperature fluctuations from the time the laminated film is slit until it is wound are suppressed ( Patent Document 2). According to this method, it is known that laminated|multilayer film can be slit in the narrow width of 0.5 mm - 4 mm of tape widths.

On the other hand, in the shear-cut method using the upper and lower blades, there is a fear that fine blade wear powder generated by the contact between the upper and lower blades may adhere to the tape after the slit. On the other hand, as a slit method that does not generate such abrasive powder and can relieve the machining precision of the blade required to obtain a clean cut surface, in a score cut method using a roll with a blade and an anvil roll, a slit There is a method of slitting a film to be used together with a carrier film (supporting material) (Patent Document 3).

Japanese Patent Laid-Open No. 2012-232392 Japanese Laid-Open Patent Publication No. 2007-90461 Japanese Laid-Open Patent Publication No. 2003-285293

According to the method of patent document 2, although the narrow tape which slitted laminated|multilayer film to width 0.5mm is obtained, the detailed examination for slitting an elongate picture with the narrow width of 0.5 mm or less is not made|formed. Moreover, the problem of peeling of the base material and adhesive layer described in patent document 2 is so easy to generate|occur|produce so that a film becomes narrow. Therefore, about the narrow tape with a width of 0.5 mm or less, we are concerned about the fall of the yield of a product, etc.

According to the description of Patent Document 3, it is possible to slit the polyester film to a width of 2 mm using a bladed roll having a blade angle of 70°. However, even by the method described in Patent Document 3, when the laminated film in which the adhesive layer is laminated so as to be peelable on the base film is to be slit to a tape width of 0.5 mm or less, the pitch of the blades in the bladed roll is narrowed. , the surface on the penetration side of the blade of the slit laminated film is strongly compressed in the slit width direction compared to the surface on the opposite side, and problems of peeling or protrusion of the adhesive layer arise.

On the other hand, the present invention is a laminated film in which the adhesive layer is laminated so as to be peelable on the base film, the base film and the adhesive layer are not peeled off, and the adhesive layer has a clean cut surface without protrusion, and the tape width is 0.5 mm or less. , especially making it a subject to slit to less than 0.5 mm.

The present inventor uses a carrier film in a score cut type slit device using a bladed roll and an anvil roll, and if the slit blade of the bladed roll is a specific blade angle, the bladed roll Even if the pitch of the slit blade in the slit is 0.5 mm or less, particularly less than 0.5 mm, the laminated film in which the adhesive layer is laminated on the base film so that peeling is not possible can be slit so that the base film and the adhesive layer are not peeled, and the slit It came to think that the protrusion of the adhesion layer from a tape could also be suppressed, and this invention was completed.

That is, the present invention is a slit device comprising a bladed roll and an anvil roll in which a plurality of sets of disk-shaped slit blades are formed at a predetermined pitch, and slits a film in a score cut method, comprising: a film to slit; It has a carrier film conveying mechanism for interposing the carrier film between the anvil rolls,

The blade angle of the slit blade is 30° or less,

A slit device in which the pitch of the slit edges is 0.5 mm or less is provided.

Moreover, this invention laminates|stacks the laminated|multilayer film and the carrier film in which the adhesive layer is laminated|stacked so that peeling is possible on the base film between the bladed roll and the anvil roll in which a plurality of sets of disk-shaped slit blades are formed at a predetermined pitch, As a slit method of a score cut system in which a film is passed over a roll side with a blade, and a laminated film is slit,

The blade angle of the slit blade should be 30° or less,

Provided is a slitting method in which the pitch of the slit edges is set to 0.5 mm or less.

Moreover, this invention provides the laminated|multilayer tape obtained by slitting the laminated|multilayer film by which the adhesion layer is laminated|stacked on the base film so that peeling is possible by the above-mentioned slit method. Moreover, as a laminated tape in which an adhesive layer is laminated so as to be peelable on a base film, the tape width is 0.5 mm or less, one end of the laminated tape having a length of 1 m is fixed, and a tension of 1 N is applied to the other end, Provided is a laminated tape in which a base film and an adhesive layer do not peel.

When the laminated film in which the adhesive layer is laminated|stacked so that peeling is laminated|stacked on the base film by the slit method of this invention by the slit method of this invention using the slit apparatus of this invention is slit, a laminated|multilayer tape with a width of 0.5 mm or less, especially less than 0.5 mm in width, is a base material It can be obtained without peeling a film and an adhesive layer. A tape having a length of 1 m is arbitrarily cut from this laminated tape, one end of the tape is fixed, and a tension of 0.5 N, preferably 1 N, more preferably 5 N is applied to the other end, but the base film and the adhesive layer are does not peel off Therefore, even if this laminated tape is wound around a reel to make a wrapper and taken out from the wrapper and used, the base film and the adhesive layer do not peel off due to the tension at the time of winding up or drawing out. Moreover, in the body of this laminated tape, there is no protrusion of an adhesive layer either. Therefore, when it is set as a recommended body, it can prevent that blocking occurs. Therefore, this laminated tape becomes useful as a narrow adhesive material for affixing an adhesive layer to an article, and when the adhesive layer is formed from a curable resin composition, it becomes useful also as an adhesive material.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view of the slit apparatus of an Example.
Fig. 2 is a side view of the vicinity of the array region of the slit edge (cutting edge) of the slit device that slits the laminated film.
Fig. 3A is a cross-sectional view showing the mounting structure of the bladed roll and the anvil roll of the device of the embodiment.
Fig. 3B is a cross-sectional view showing a modified aspect of the mounting structure of the bladed roll and the anvil roll.
Fig. 3C is a cross-sectional view showing a modified aspect of the mounting structure of the bladed roll and the anvil roll.
Fig. 4 is an enlarged cross-sectional view of a portion of a slit when a laminated film is slit with the slit of the apparatus of the Example.
It is an enlarged cross-sectional view of the slit blade part at the time of slitting the laminated|multilayer film by which laminated|multilayered films were connected in the longitudinal direction with the connecting tape.
Fig. 6 is an enlarged cross-sectional view of a portion of a slit when a laminated film is slit with a slit having a blade angle of 70°.

Hereinafter, the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same code|symbol has shown the same or equivalent component.

<Entire configuration of slit device>

Fig. 1 is a schematic perspective view of a slit device 1 according to an embodiment of the present invention, and Fig. 2 is a side view of the vicinity of the arrangement region of the slit blades when the film 3 is slit by the slit device 1 .

As for this slit device 1, as shown in FIG. 2, the disk-shaped slit blade 11 is the area|region in which the rotation axis L1 direction of the roll 12 is arranged on the cylindrical roll 12 at a predetermined pitch. It is an apparatus which is provided with the bladed roll 10 which has (13), and the cylindrical anvil roll 20, and slits the film 3 by the score cut method. In the share cut method, the upper blade and the lower blade are in contact, whereas in the score cut method there is no contact between the blades, so the life of the blade can be prolonged.

The slit device 1 includes a film unwinding device 2 and a winding device (not shown) as a conveying mechanism for passing the slit film 3 between the bladed roll 10 and the anvil roll 20 . installed. The winding device includes a winding device for winding the even-numbered tapes 3a and a winding device for winding the odd-numbered tapes 3b so that adjacent tapes among a plurality of rows of tapes obtained by slitting the film are wound in different directions from each other, respectively. can In addition, although it is described that the tapes 3a of even rows are wound from above and the tapes 3b of odd rows are wound from the bottom in FIG. do.

In the slit device 1, a carrier film unwinding device 5 and a carrier film 4 are provided as a carrier film conveying mechanism in which the carrier film 4 is interposed between the film 3 to be slit and the anvil roll 20. A pair of lamination rolls 6 overlapping with the film 3, and a carrier film winding unit (not shown) for winding the end portions (film ears) of the film after the slit and the carrier film 4 together is formed

In this slit device 1, as will be described later, the film 3 to be slit is not only a single-layer resin film, or a laminated film in which a plurality of resin layers are adhered or welded, but also an adhesive layer on the base film 31 . (32) Even if it is the laminated|multilayer film 30 (FIG. 4) laminated|stacked so that peeling is possible, it makes it possible to slit to width 0.5mm or less, especially less than 0.5mm in width.

<Slit edge>

It is preferable that the slit blade 11 provided in the roll 10 with a blade sets it as a double-edged point from the point of stabilizing a slit direction. If the slit blade is a single blade (that is, if one of the two blade surfaces forming the blade edge is a flat surface and the other is an arc surface), the force in the film width direction applied to the slit blade at the time of slitting is , it becomes larger in the arc surface than the flat surface, and since the film is bent and conveyed in the arc side direction, it is necessary to take a wide margin in the width direction of the film to be slit, and the amount of waste at the edge of the film also increases. On the other hand, since the force in the film width direction applied to the slit blade at the time of slitting becomes the same on both sides of the blade by using a double-edged blade, it is possible to prevent bending of the conveying direction of the film, and it is possible to reduce the amount of waste at the end of the film.

The blade angle (α) of the slit blade 11 is a laminate film in which the adhesive layer is formed so as to be peelable on the base film in a narrow width of 0.5 mm or less, particularly less than 0.5 mm in width, and the base film and the adhesive layer are not peeled off. It is preferable to set it as 30 degrees or less from the point of making it possible to slit, and to set it as 25 degrees or less especially. On the other hand, from the viewpoint of durability of the slit blade, the blade angle α is preferably set to 10° or more.

The pitch p of the slit edges 11 is determined according to the tape width required for the tape obtained by slitting the film 3, but in the present invention, in order to cope with a narrow tape, the upper limit is 0.5 mm or less, In particular, it may be less than 0.5 mm, and may be 0.4 mm or less. Regarding the lower limit, it is preferably 0.1 mm or more.

The blade height h of the slit edge of the slit blade 11 is preferably higher in terms of stabilizing the slit precision, and the lower limit is preferably 0.05 mm or more, more preferably 0.1 mm or more, still more preferably is 0.24 mm or more. On the other hand, the blade height h of the slit blade is preferably lower in terms of durability of the slit blade, and the upper limit is preferably 0.8 mm or less, more preferably 0.7 mm or less, still more preferably 0.5 mm or less. am.

As described in Patent Document 3, when the blade angle (α) of the slit blade is 70°, when the pitch is 0.5 mm or less, the laminated film in which the adhesive layer is laminated so as to be peelable on the base film is slitted, As shown in 6, in the laminated film 30, the adhesive layer 32 and the cover film 33 are sequentially formed on the base film 31, and the adhesive layer 32 is not exposed to the film surface. Also, the surface on the penetration side of the slit blade 11 in the laminated film 30 receives a strong compressive force F in the slit width direction compared with the surface on the opposite side. Therefore, in the tape after the slit, the base film 31 or the cover film 33 peels off from the adhesive layer 32, or the adhesive layer 32 protrudes from the side of the tape. There may or may not be a problem. On the other hand, in the present invention, since the blade angle of the slit blade 11 is reduced to 30 degrees or less, even if the pitch of the slit edge 11 is 0.5 mm or less, particularly 0.1 mm or more and 0.4 mm or less, as shown in FIG. The compressive force F applied to the penetration-side surface of the blade 11 is reduced, and the adhesive layer 32 is laminated on the base film 31 so that the laminated film 30 is laminated so as to be peeled off. A slit can be performed without causing it, and the protrusion of the adhesive layer 32 from the side surface of a tape can be suppressed. In the narrow tape, compared to the wide tape, the force in the slit width direction applied per the tape cross-sectional area is relatively large, so that the sticking of the adhesive layer tends to occur. Therefore, it can be said that the protrusion suppression of the adhesion layer 32 becomes difficult when a tape width|variety becomes narrow.

With the bladed roll 10 having the region 13 in which the slit edges 11 are arranged at the above-described blade angle α and pitch p, as shown in FIG. 2 , for cutting of a metal roll A cutting blade obtained by the above method, or a combined blade in which a round blade having a blade angle α is overlapped in the direction of the rotation axis, or the like can be used. Among these, the cutting edge shown in FIG. 2 forms an easy-to-cut alloy layer on the surface of a high-strength and durable roll 12 such as carbon steel, and uses the easy-to-cut alloy layer with a precision cutting device using a diamond tool, etc. It can be obtained by cutting. Moreover, a combination blade can be obtained by forming each slit blade 11 by cutting, and combining the slit blades with a predetermined pitch. The configuration of the slit blade is not particularly limited as long as the blade angle is 30° or less, the pitch is 0.5 mm or less, preferably less than 0.5 mm, more preferably 0.4 mm or less, and the effect of the present invention is obtained.

As the easy-to-cut alloy (that is, an alloy with good machinability) forming the slit edge, a nickel-phosphorus alloy, a hard copper alloy, tool steel, a cemented carbide, or the like can be used. From the viewpoint of durability of the easy-to-cut alloy, the Vickers hardness is preferably 475 or more, more preferably 500 or more, still more preferably 550 or more, and particularly preferably 1400 or more.

<Installation of bladed roll and anvil roll>

In the slit device 1, the bladed roll 10 and the anvil roll 20 are supported by bearings 15 and 25, respectively, as shown in FIG. 3A, and the rotation shafts L1 and L2 are parallel. placed so as to As long as the rotation axes L1 and L2 are parallel, the directions of the rotation axes L1 and L2 may be horizontal or vertical. From the viewpoint of stabilizing the running of the laminated film 30 , it is preferable to make the direction of the rotation shafts L1 and L2 horizontal, and to arrange the bladed roll 10 on the anvil roll 20 . On the other hand, from the point where a foreign material does not adhere to the laminated|multilayer film 30 easily, it is preferable to make the direction of rotation shaft L1, L2 into a perpendicular direction.

The bladed roll 10 and the anvil roll 20 are connected by gears 16 and 26, and a drive mechanism for rotating them in the direction of the arrow in FIG. 1 is provided. In addition, you may provide the drive mechanism which rotationally drives the bladed roll 10 and the anvil roll 20 individually.

The cut amount d2 (FIG. 2) of the slit blade 11 with respect to the carrier film 4 is a point which performs a slit continuously and stably, As an example, Preferably it is 10-100 micrometers, More preferably, it is 10 - 50 micrometers, More preferably, it is set as 10-20 micrometers. The slit device 1 is provided with an adjustment mechanism that moves the attachment position of the bladed roll 10 with respect to the anvil roll 20 so that the cutting amount d2 can be adjusted according to the thickness of the carrier film 4 . It is preferable to do As this adjustment mechanism, the linear guide mechanism etc. which move the bladed roll 10 along the guide 17 with the adjustment screw 18 can be provided.

On the other hand, when using a carrier film having a constant film thickness, as shown in Fig. 3B, a large-diameter portion 14 protruding from the edge of the slit blade 11 to the anvil roll 20 side is attached with a blade. You may make it form in the used roll 10, and press the large-diameter part 14 against the anvil roll 20. As shown in FIG. The thrust for pressing the large-diameter portion 14 against the anvil roll 20 can be about 800 N. If this thrust is made excessively large, a bending problem will arise in the roll 10 with a blade. In addition, as shown in FIG. 3C, a round blade with a thickness of 0.5 mm or less finished by cutting and cutting tool steel, cemented carbide, etc. in a circle is combined, and this is fixed with a bolt 19 to construct a combined blade, You may form the array area|region 13 of a slit edge with a combined blade. In the embodiment shown in Fig. 3C, similarly to the embodiment shown in Fig. 3A, the mounting positions of the anvil roll 20 and the bladed roll 10 are adjusted with the adjusting screw 18, so the bladed roll 10 is Thrust is unnecessary to press the to the anvil roll (20).

<slit method>

The slit method of this invention is laminated|multilayer film 30 in which the adhesion layer 32 is laminated|stacked so that peeling is possible on the base film 31 between the bladed roll 10 and the anvil roll 20 mentioned above. As a method of slitting the laminated film 30 by passing through It is a method of slitting the laminated|multilayer film 30 by a score cut system by making the carrier film 4 overlap and pass (FIG. 1, FIG. 4). As will be described later, when the laminated film 30 consists of the base film 31, the adhesive layer 32, and the cover film 33, as shown in FIG. 4, the base film 31 of the laminated film 30 It is common to make the roll 10 side with a blade, and to set the cover film 33 to the carrier film 4 side. In this case, the cover film 33 and the carrier film 4 are adhere|attached and slit, and the cover film 33 and the carrier film 4 are put together after a slit, and it peels from the adhesion layer 32. In addition, you may make the cover film 33 of the laminated|multilayer film 30 into the roll 10 side with a blade, and may slit the base film 31 as the carrier film 4 side.

With this slit, the carrier film 4 is cut in half, but the laminated film 30 is cut through at a predetermined pitch, so that among a plurality of rows of tapes obtained by the laminated film 30 being through-cut, adjacent tapes are wound in different directions from each other. , The even-numbered tapes 3a and the odd-numbered tapes 3b are wound with a winding device, respectively.

In addition, the edge part (ear|ear of a laminated|multilayer film) 3c of the laminated|multilayer film 30 after a slit and the carrier film 4 by which the half cut was put together are wound up. Moreover, you may make it wind up the cover film 33 together with the carrier film 4 .

As for the cut amount d2 with respect to the carrier film 4 by the slit 11, as mentioned above, it is preferable to set it as 10 micrometers or more and 100 micrometers or less. In addition, with respect to the blade height h, the total thickness of the piecelets (laminated film 30 and carrier film 4) is preferably 90% or less, for example, when the blade height is 300 µm, The total thickness of the piecelets is preferably 270 µm or less (FIG. 2). More preferably, the total thickness of the piecelet is 70% or less with respect to the blade height h, and still more preferably 50% or less.

In addition, although it is preferable to perform a slit in a clean room, in order to suppress the fluctuation|variation of environmental temperature, it is unnecessary to provide the hood which covers the whole slit apparatus, but you may provide.

<Lamination film>

As the laminated|multilayer film 30 slit by the slit method of this invention, as shown, for example in FIG. 4, the base film 31 of thickness 12-75 micrometers, especially 25-75 micrometers, thickness 5-40 micrometers, In particular, the 5-25-micrometer-thick adhesion layer 32 and thickness are thinner than a base film, or what laminated|stacked so that the 10-50-micrometer-thick cover film 33 could peel one by one is mentioned. Here, being able to peel means sticking and peeling a cellophane tape to the base film 31 or the cover film 33, or cutting the end of the base film 31 or the cover film 33 with tweezers for a film (hereinafter referred to as tweezers). , tweezers), which means that the base film 31 or the cover film 33 can be easily peeled off the adhesive layer 32 .

As shown in FIG. 4 , at the time of slitting, the base film 31 may be arrange|positioned at the penetration side of the slit edge 11, and the cover film 33 may be arrange|positioned at the penetration side of the slit edge 11. As shown in FIG.

In addition, the cover film 33 does not need to be formed in the laminated|multilayer film 30 depending on the use of the laminated|multilayer tape obtained by slitting laminated|multilayer film. When the carrier film 4 is superimposed on the laminated film 30, the rigidity of the entire film increases, so even without the cover film 33, the adhesive layer 32 is adhered to the slit blade 11 immediately after the slit, whereby the base film ( 31), the peeling of the adhesive layer 32 can be eliminated. On the other hand, from the point of contamination prevention of a laminated tape, the side with the cover film 33 is preferable, and when obtaining a narrow laminated tape especially, the side with the cover film 33 is preferable. As a recommended body, which is a form finally used as an adhesive, a cover film may be present for preventing contamination or may not be present in order to improve workability.

(base film, cover film)

As for the base film 31, the film formed from thermoplastic resins, such as polyester, such as polyethylene, a polypropylene, and PET, is mentioned. The cover film 33 is formed in order to prevent that the adhesion layer 32 is contaminated, and can be formed from the same material as the base film 31. As for the surface of the base film 31 or the cover film 33, it is preferable that the peeling process is carried out. This is for making it separable from an adhesive layer. In order to be able to peel off a cover film first after a slit, it is preferable to use the thing which peels more easily in the cover film 33 rather than the base film 31.

In the present invention, the adhesive layer 32 with relatively low rigidity and the base film 31 with relatively high rigidity are slit at the same time, and do not separate at the time of the slit, and when the laminated tape after the slit is used, the adhesive layer 32 and The base film 31 is made peelable. Here, since the tensile modulus of elasticity of polyester such as polyethylene, polypropylene, and PET is approximately 1100 to 4200 MPa, the film formed of such a thermoplastic resin and the adhesive layer 32 having different rigidity from the film are simultaneously formed with a width of 0.5 mm or less. Although slitting narrowly and suppressing the separation or peeling of a film and an adhesion layer at the time of a slit is a technique with high difficulty, according to this invention, such a slit becomes possible.

(adhesive layer)

As the adhesion layer 32, an adhesion film may be laminated|stacked, and the coating film of an adhesive may be laminated|stacked. According to the use of the tape obtained by slitting the laminated|multilayer film 30, the adhesion layer 32 may be comprised from a single resin layer, and may be comprised from the laminated body of several resin layers, or a multilayer body. Moreover, a filler may be contained in the adhesion layer 32 as needed.

(Filler of the adhesive layer)

When the adhesive layer contains a filler, the filler is a known inorganic filler (metal, metal oxide, metal nitride, etc.), organic filler (resin, rubber, etc.) depending on the use of the tape obtained by slitting the laminated film 30 . ), a filler in which an organic material and an inorganic material are mixed, etc. are appropriately selected according to the use. For example, in an optical use or a gloss removal use, a silica filler, a titanium oxide filler, a styrene filler, an acrylic filler, a melamine filler, various titanate, etc. can be used. For the use of the film for capacitors, titanium oxide, magnesium titanate, zinc titanate, bismuth titanate, lanthanum oxide, calcium titanate, strontium titanate, barium titanate, barium zirconate titanate, lead zirconate titanate, and mixtures thereof and the like can be used. For use as an adhesive, polymer rubber particles, silicone rubber particles, and the like can be contained. In the use of electronic component mounting, a filler may have electroconductivity and may have insulation. When the filler has insulating properties, for example, the filler can be used as a spacer.

The particle diameter of a filler can be determined according to the use of the tape obtained by slitting the laminated|multilayer film 30. For example, when this tape is used for mounting an electronic component, the particle diameter of a filler becomes like this. Preferably they are 1 micrometer or more, More preferably, they are 2.5 micrometers or more and 30 micrometers or less.

Here, the particle diameter means an average particle diameter. An average particle diameter can be calculated|required from the planar image of the adhesion layer 32 of the laminated|multilayer film 30, or a cross-sectional image. Moreover, the average particle diameter of the filler as raw material particle|grains before containing a filler in the adhesion layer 32 of the laminated|multilayer film 30 can be calculated|required using wet flow type particle diameter and shape analyzer FPIA-3000 (Malvern Corporation). N number is 1000 or more, Preferably it is 2000 or more, More preferably, it is 5000 or more. On the other hand, the filler may contain a filler having a particle diameter of less than 1 µm. The filler for viscosity adjustment etc. are mentioned as a filler (so-called nano filler) with a particle diameter of less than 1 micrometer. This magnitude|size can be calculated|required by observation with an electron microscope (TEM, SEM). The number of N is preferably 200 or more.

As a filler, the thing which has functionality like a quantum dot may be contained. Although there is no limitation in particular as a size of such a filler, 2 nm or more is preferable and 10 nm or more is more preferable. This magnitude|size can also be calculated|required by observation with an electron microscope (TEM, SEM). The number of N is preferably 200 or more.

In the present invention, the filler described below refers to the filler having a particle diameter of 1 µm or more, as described above, unless otherwise specified. That is, nano fillers used as surface modifiers or fillers are excluded.

In the pressure-sensitive adhesive layer, the fillers may be kneaded in the resin and randomly dispersed, may be individually non-contact in a plan view, or may be in a regular arrangement that repeats a predetermined arrangement in a plan view. The number density of a filler is suitably adjusted in the range which does not affect the slit of a film, and in a surface view, it can be 30-100000 pieces/mm<2>, for example. This number density is measured by observing the fillers in the pressure-sensitive adhesive layer using an optical microscope or a metallographic microscope in a plan view, making the area of 10 or more points 2 mm2 or more in total, and making the total number of fillers 200 or more. desirable.

(Resin composition forming an adhesive layer)

On the other hand, the resin composition forming the pressure-sensitive adhesive layer 32 is appropriately selected depending on the use of the tape obtained by slitting the laminated film 30, the presence or absence of a filler, etc., showing tackiness or adhesiveness, a thermoplastic resin composition, a high-viscosity adhesive resin It can form from a composition, curable resin composition, etc. For example, when a tape is used as an adhesive used for mounting electronic parts, etc., the resin composition for forming the adhesive layer is mixed with a polymerizable compound and a polymerization initiator, similarly to the resin composition for forming the insulating resin layer described in WO2018/074318A1 publication. It can be set as the curable resin composition containing. A so-called hot-melt type adhesive material that does not contain a curable resin composition may be used.

As a polymerization initiator of curable resin composition, a thermal-polymerization initiator may be used, a photoinitiator may be used, and they may be used together. For example, an epoxy resin is used as a thermal cationic polymerization initiator and a thermally polymerizable compound as a thermal polymerization initiator, and an acrylate compound is used as a photo-radical polymerization initiator and a photopolymerizable compound as a photoinitiator. As the thermal polymerization initiator, a thermal anionic polymerization initiator may be used. As a thermal anionic polymerization initiator, it is preferable to use the microcapsule type latent hardening|curing agent which uses an imidazole modified body as a nucleus and coat|covers the surface with polyurethane.

The overall minimum melt viscosity of the pressure-sensitive adhesive layer formed of such an insulating resin composition is not particularly limited, but can be 100 Pa·s or more from the viewpoint of film formation, and a filler when the pressure-sensitive adhesive layer 32 is thermocompressed to the article. In order to suppress the unnecessary flow of , it is preferably set to 1500 Pa·s or more. On the other hand, there is no restriction|limiting in particular about the upper limit of minimum melt viscosity, As an example, Preferably it is 15000 Pa.s or less, More preferably, it is 10000 Pa.s or less. This minimum melt viscosity can be obtained by using a rotary rheometer (manufactured by TA Instruments) as an example, maintaining a constant measurement pressure of 5 g, and using a measurement plate having a diameter of 8 mm, more specifically, the temperature In the range of 30-200 degreeC, it can obtain|require by setting it as the temperature increase rate of 10 degree-C/min, the measurement frequency of 10 Hz, and 5 g of load fluctuations with respect to the said measurement plate. In addition, adjustment of minimum melt viscosity can be performed by the kind, compounding quantity of the microsolid contained as a melt viscosity modifier, change of the adjustment conditions of a resin composition, etc.

(Adhesive force of the adhesive layer)

· Peelability

The adhesive force of the adhesive layer 32 to the base film 31 and the cover film 33 is the adhesive layer 32 when the adhesive layer 32 is adhered to a predetermined article for each use of the tape. ), the base film 31 and the cover film 33 can be peeled from the adhesion layer 32 . Usually, after peeling the cover film 33, the adhesion layer 32 is affixed to an article|article, and the peelability of the base film 31 is evaluated. The fact that the base film 31 and the cover film 33 can be peeled from the pressure-sensitive adhesive layer 32 means that the cellophane tape is attached to and removed from the base film 31 or the cover film 33 as described above, or by tweezers. By holding the end of the base film 31 or the cover film 33 and peeling it off, it is said that these can be easily peeled from the adhesive layer 32, but as this specific index, the laminated film before the slit is 5 cm wide, When it cuts to 15 cm in length and a T-type peeling test (JISK6854) is done as a peeling test, the thing of 0.005-0.2N is mentioned with adhesive strength. Depending on the material, thickness, etc. of the base film 31, you may evaluate by a 180 degree peeling test or a 90 degree peeling test. First, the cover film 33 is peeled off from the base film 31 and the adhesive layer 32 using a cellophane tape, and the adhesive layer 32 is affixed to the article, and then the base film 31 is peeled off with tweezers. It is common.

·stability

On the other hand, when the laminated film 30 is slitted with a tape and the tape is wound on a reel with a winding device to form a rolled body, or when a tape made into a rolled body is used as an adhesive material, the recommended body is attached to a connecting device and the tape is taken out from the rolled body. In this case, tension (tension) is applied to the tape in the longitudinal direction of the tape. Then, it is preferable to prevent the base film 31 and the adhesive layer 32 from peeling when such tension is applied to a tape. That is, conventionally, the length of the tape required for the winding body in the connecting device is usually 5 m or more, preferably 10 m or more, and the tension applied in the longitudinal direction of the tape when the tape is taken out from the winding body is 1 N to 5 About N is typical. Moreover, when a problem arises during operation|movement of a connection apparatus, a lock is caught on a reel, and the tension of 5-6N may be applied to a tape. For this reason, it is necessary to assume that a load of about 5 N is applied to the tape. Therefore, in this tension, the adhesion state of the base film and the adhesive layer and the connection between the reel and the base film (connection between the lead taken out from the reel and the base film by an adhesive film such as a silicone tape, or ultrasonic welding) is maintained. desirable.

However, when a tape is made narrow and the conventional tension is applied to a tape, it is concerned that a base film fractures|ruptures or that a base film and an adhesive layer peel in some cases. Therefore, in the case of winding or pulling out a narrow tape by making use of the existing equipment as much as possible, the tension applied in the longitudinal direction of the tape may be about 0.5 N, preferably less than 1 N. About an upper limit, More preferably, it is 0.7 N or less, More preferably, it is 0.3 N or less.

In view of the practical request for enabling such winding and pulling-out, the adhesive layer 32 has a length of 1 m or more, preferably 5 m or more, of a laminated tape slitted to a width of 0.1 mm or more and 0.5 mm or less by the method of the present invention. Stability that the base film 31 and the cover film 33 do not peel from the adhesive layer 32 when a tension of 0.5 N or more, preferably 1 N, and more preferably 5 N is applied thereto in the longitudinal direction this is required In addition, although the above-mentioned peelability is a property regarding the upper limit of the adhesive force of the adhesion layer 32 with respect to the base film 31 and the cover film 33, this stability is a property regarding the lower limit of adhesive force.

It is preferable to perform a stability test simply. So, as a test method, the test length of the laminated tape is 1 m, one end of the laminated tape cut to a length of 1 m is fixed, and the other end is loaded with 0.5 N, preferably 1 N, more preferably 5 N. , the test for observing the presence or absence of peeling of the base film 31 and the adhesion layer 32 is mentioned. Further, as a more practical test method, a test in which the tape is pulled out 1 m or more from the body, and 0.3 N, 0.5 N, 1 N, or 5 N is applied to the end portion, and the presence or absence of peeling is observed. . Moreover, the entire length of the tape may be taken out from the body, and the presence or absence of peeling may be observed at arbitrary 20 points or more, Preferably 50 points or more. In such a test, as an example of an index of adhesive force required for practical use, (i) a laminated film is slitted with a laminated tape having a width of 0.1 mm or more and 0.5 mm or less by the method of the present invention, and the cover film is removed to form an adhesive layer and Let the tape of the base film be a rolled body, and the tape is drawn out 1 m in length from the wrapper to fix the connection position of the reel core and the tape, and 0.3 N, preferably, by a static load on the tape end When a tension of 0.5 N, more preferably 1 N, and still more preferably 5 N is applied with a connection position angle α (Japanese Patent Application Laid-Open No. 2017-137188) of 90°, the base film is separated from the adhesive layer. No peeling and no protrusion to the extent that it affects drawing (ii) Test length in which the laminated film is arbitrarily cut from the laminated tape slitted to a width of 0.1 mm or more and 0.5 mm or less by the method of the present invention In a 1 m test piece, when a tension of 0.5 N, preferably 1 N, and more preferably 5 N is applied in the longitudinal direction of the test piece, the base film 31 does not peel from the adhesive layer 32 (iii) When the tape of the adhesive layer and the base film is pulled out by hand from the body that is wound 5 m or more around the core with 0.5 N of the adhesive layer and the tape of the base film, the peeling of the adhesive layer and the base film over the entire length of the tape is visually observed. Those not confirmed (the details are described in the Example mentioned later), etc. are mentioned. The method of (iii) is preferable from the point of a simple test. When it cuts out to test length about 1 m and a load (about 1 N-5 N grade) is applied to both ends by hand, you may confirm that peeling of a base film and an adhesion layer does not generate|occur|produce.

When the laminated tape has the above-described adhesive strength, the laminated tape is preferably wound around a body with a length of 5 m or more, 10 m or more, 50 m or more, and further 100 m or more, and the tape is preferably wound from the winding body. Even when drawn out 1 m or more, more preferably 5 m or more, it is possible to prevent the base film 31 from peeling from the adhesive layer 32 in the drawn-out tape, and this tape can be provided for mounting of electronic components. can

・Adhesiveness to the object to be connected

On the other hand, as a test method of the adhesive force required for the adhesive layer from the viewpoint of adhesive force to a connection object such as an electronic component or a substrate, a small piece of 2 cm in length arbitrarily taken from a laminated tape (1 m in (ii) described above) Temporarily pasting (for example, at 45°C) from the adhesive layer side to small glass (a small piece cut out of a test piece of the laminated tape may be used), and using tweezers to remove the base film 31 (or cover film 33). A peeling test of holding and removing only the edge is carried out, and in the peeling test, only the base film 31 (or the cover film 33) can be removed, and the adhesive layer remains attached to the small glass without changing its shape. Here's a way to make it a success. In this peeling test, the number of N is 20 or more and a success of 75% or more is preferable, a success of 80% or more is more preferable, and a success of 90% or more is still more preferable.

(Attaching of the connecting tape)

To the laminated film 30, in order to attach a lead at the time of winding or unwinding of the winding body, or to bond the 1st laminated film and the 2nd laminated film together to make it elongate, it is connected to the laminated film 30 The tape may be affixed. The connection points may be regular or randomly plural. Moreover, in attachment of a laminated|multilayer film and a lead, the base film 31 of the laminated|multilayer film 30, and a lead can be stuck together with a connecting tape. A well-known method, such as ultrasonic welding, may be sufficient as attachment to the lead|lead of laminated|multilayer film.

As the connecting tape, an adhesive tape (eg, silicone tape) with a base material having high releasability and a relatively thin total thickness can be used. Although there is no restriction|limiting in particular as for the thickness of a connection tape, 5-75 micrometers is mentioned as an example.

When slitting the part by which the connecting tape is stuck to the laminated|multilayer film 30, as shown in FIG. 5, the slitting edge 11 enters deeply into the laminated body of the laminated|multilayer film 30 and the connecting tape 35. Therefore, according to the conventional slit device, as for the surface of the laminated body on the penetration side of the slit 11, the space|interval between adjacent blades becomes remarkably narrow, and the side surface of the slit 11 with respect to the surface on the opposite side. The cover film 33 or the base film 31 and the adhesive layer 32 peel, or the adhesive layer 32 protrudes easily from the side surface of the slit laminated body by receiving a strong compressive force F from On the other hand, according to this invention, even if the connecting tape 35 is stuck to the laminated|multilayer film 30, it can suppress that such peeling and protrusion generate|occur|produce.

<Lamination Tape>

The laminated tape of this invention is a tape obtained by slitting the laminated|multilayer film 30 by the slit method mentioned above. Therefore, this tape is a laminated tape in which an adhesive layer is laminated on a base film so as to be peelable, and is 0.5 mm or less, particularly less than 0.5 mm, more preferably 0.4 mm or less, still more preferably with respect to the upper limit of the tape width. 0.3 mm or less. About the lower limit, it is 0.1 mm or more, Preferably it is 0.15 mm or more, More preferably, it is 0.2 mm or more.

In this laminated tape, when one end of the test piece is fixed so as to have a test length of 1 m cut arbitrarily from the tape, and a tension of 0.3 N, 0.5 N or 1 N is applied to the other end, the base film and the adhesive layer do not peel, Moreover, the body has the characteristic that there is no protrusion of the adhesive layer 32. In addition, in this laminated tape, when the tape is cut into small pieces having a length of 2 cm and the adhesive layer 32 is attached to the small glass, and only the end of the base film 31 is held and removed with tweezers, the adhesive layer is easily peeled from the small glass. It satisfies the practical request that it does not do so, and enables so-called adhesion and electrodeposition.

It is preferable to use this tape as the recommended body wound on a reel from the point of handleability. From a practical point of view, the tape length in the recommended body is preferably 5 m or more and 5000 m or less, more preferably 50 m or more and 1000 m or less, still more preferably 500 m or less. In general, when the tape width becomes narrower, blocking tends to occur in the wrapper. However, according to the laminated tape of the present invention, blocking is less likely to occur in the wrapper, and even if the tape is pulled out 5 m or more from the wrapper, the tape pulled out Therefore, peeling does not occur between the base film 31 or the cover film 33 and the adhesive layer 32 .

Moreover, in general, the edge part used as the cut surface of the slit of the laminated|multilayer tape obtained by slitting laminated|multilayer film may visually see float (discoloration part) generate|occur|produce. When the tape width is 0.5 mm or less, floating at both ends of the laminated tape may become a factor causing unnecessary peeling of the base film and the adhesive layer. However, according to the present invention, since the laminated film is slitted with a sharp double-edged blade, it floats even if it is arbitrarily checked for the presence or absence of floatation at 20 points or more, preferably 50 points or more, by visual observation from the entire length of the tape forming the wrapper. is not well observed. Even when floatation is observed at the end along the cut surface of the slit of the laminated tape, the floatation is less than 5 cm in length and 40% or less, particularly 1/3 or less, of the width of the tape, so that peeling of the base film and the adhesive layer is performed. can be suppressed

As described above, according to the laminated tape of the present invention, the base film and the adhesive layer do not shift well, and blocking or lifting does not easily occur. When sticking to a member, a shift|offset|difference does not generate|occur|produce easily in a sticking position. Therefore, the lamination tape of this invention can be used for various uses as a narrow adhesive material or adhesive material. In that case, the kind, etc. of the resin composition which comprises the adhesion layer 32 are suitably selected according to the target member to stick a tape.

Example

Example 1

The base film is formed of a peeling-treated PET film having a thickness of 38 μm, the adhesive layer is formed of an acrylic thermosetting resin having a thickness of 10 μm (adhesive film, manufactured by Dexerials), and the cover film is formed of a PET film having a thickness of 12 μm. The formed laminated film was slitted with a tape having a width of 0.3 mm and a length of 100 m in one circuit using the cutting edge shown in FIG. The following evaluation was performed by applying tension (winding tension) 0.3-0.6N to the span distance 0.4mm) and winding up it as a body.

(1) lift

All of the 100 m tape used as a recommended body was pulled out by hand, and 20 points of a test area of 10 cm in length at any position of the drawn tape were visually observed, and the following items a, b, c regarding the presence or absence of lifting based on the following criteria.

a: There is no floating more than 5 cm in length

b: there is no float whose width exceeds 1/3 of the width of the tape

c: No more than 5 points of float less than 5 cm in length or less than 1/3 of the width of the tape

Evaluation A: If all abc is satisfied

Evaluation B: If ab is satisfied together

Evaluation C: Other than evaluation A and evaluation B above

This evaluation result was evaluation A. Moreover, practically, if evaluation B is satisfied, there will be no problem, and it is preferable to satisfy|fill c further.

(2) peeling

The said test WHEREIN: It was confirmed that peeling had not generate|occur|produced at the point which performed visual observation of a float, and a total of 50 points of 30 points other than that. Although visual observation was carried out, drawing out the full length during the test, there was no peeling in general.

Moreover, there was no generation|occurrence|production of the protrusion of the adhesive layer which causes trouble in workability|operativity, and adhesion of the adhesive layer to a flange was not confirmed either.

In addition, the result of (1) and (2) mentioned above is not limited to the slit by a cutting edge.

1: slit device
2: film unwinding device
3: film
4: carrier film
5: carrier film unwinding device
6: Laminate roll
10: roll with blade attached
11: slit blade, round blade
12 : roll
13: area
14: large diameter part
15: bearing
16 : gear
17: Guide
18: adjusting screw
19 : bolt
20: Anvil Roll
25: bearing
26 : gear
30: laminated film
31: base film
32: adhesive layer
33: cover film
35: connecting tape
α: angle of slit blade
d1 : Gap between the edge of the slit blade and the anvil roll
d2: Amount of cut of the slit to the carrier film
F: compression force
h : blade height of slit blade
L1, L2: rotation axis
p : pitch of slit edge

Claims (15)

A slit device comprising: a bladed roll and an anvil roll in which a plurality of sets of disk-shaped slit blades are formed at a predetermined pitch;
It has a carrier film conveying mechanism for interposing the carrier film between the film to be slit and the anvil roll,
The blade angle of the slit blade is 30° or less,
A slit device in which the pitch of the slit blades is 0.5 mm or less. The method of claim 1,
A slit device with a slit blade angle of 10° or more. 3. The method according to claim 1 or 2,
A slit device in which the pitch of the slit blades is 0.1 mm or more and 0.4 mm or less. 4. The method according to any one of claims 1 to 3,
A slit device in which the blade height of the slit blade is 0.05 mm or more and 0.8 mm or less. 5. The method according to any one of claims 1 to 4,
A slit device having an adjustment mechanism for moving the mounting position of the bladed roll with respect to the anvil roll. The laminated film and the carrier film in which the adhesive layer is laminated|stacked so that peeling is possible on the base film between the bladed roll and the anvil roll in which a plurality of sets of disk-shaped slit blades are formed at a predetermined pitch, and the laminated|multilayer film are bladed As a slit method of a score cut system in which the laminated film is slit by overlapping the roll side,
The blade angle of the slit blade should be 30° or less,
A slitting method in which the pitch of the slit blades is 0.5 mm or less. 7. The method of claim 6,
A slit method in which the blade angle of the slit blade is 10° or more. 8. The method according to claim 6 or 7,
A slit method in which the pitch of the slit blade is set to 0.1 mm or more and 0.4 mm or less. 9. The method according to any one of claims 6 to 8,
The slit method in which the laminated|multilayer film is laminated|stacked on the adhesion layer so that a cover film can peel. 10. The method according to any one of claims 6 to 9,
A slit method in which a joint tape is affixed to a laminated film. The laminated tape obtained by slitting the laminated|multilayer film by which the adhesion layer is laminated|stacked on the base film so that peeling is possible by the slit method in any one of Claims 6-10. A laminated tape in which an adhesive layer is laminated so as to be peelable on a base film, the tape width is 0.5 mm or less, one end of a laminated tape having a length of 1 m cut arbitrarily from the laminated tape is fixed, and a tension of 1 N is applied to the other end. In this case, the laminated tape from which the base film and the adhesive layer do not peel. 13. The method of claim 12,
The laminated tape whose tape width is 0.1 mm or more and 0.4 mm or less. 14. The method according to claim 12 or 13,
The laminated tape by which the cover film is laminated|stacked on the adhesive layer so that peeling is possible. 15. The method according to any one of claims 12 to 14,
Laminated tape to which joint tape is affixed.

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