JP2019151745A - Wound body of adhesive sheet with release material - Google Patents

Abstract

To provide a wound body of an adhesive sheet with a release material appropriate for reducing an occurrence of wrinkles in the release material.SOLUTION: An adhesive sheet 10 with a release material forming a wound body X of this invention includes release materials 11, 12 and a plurality of adhesive sheets 13. The release material 11 extends in one direction and has a width in a direction orthogonal to the extending direction F. The plurality of adhesive sheets 13 are aligned on the release material 11, distanced with each other in the extending direction F of the release material 11, and have a length of 10-100 mm respectively in a width direction W of the release material 11. The release materials 12 respectively cover the plurality of adhesive sheets 13 on the opposite side of the release material 11. A distance of neighboring two adhesive sheets 13 is 30%-150% of the length in the extending direction F of the respective neighboring adhesive sheets 13.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wound body of an adhesive sheet with a release material on both sides.

  The adhesive used in the form of a thin layer may be provided in the form of an adhesive layer or an adhesive sheet with a release material such as a separator on both sides. In addition, such an adhesive sheet with a release material is produced as a long sheet body from the viewpoint of the handleability and workability of the sheet, and is a wound form, that is, a roll form. There is. For example, the following Patent Documents 1 and 2 describe a technique relating to an adhesive sheet with a release material in the form of a roll, that is, an adhesive sheet roll with a release material.

JP 2008-162264 A JP 2008-169281 A

  In an adhesive sheet with a double-sided release material in the form of a roll, wrinkles may conventionally occur in the release material. In the laminated configuration of the adhesive sheet in the form of a roll, the release material located on the inner diameter side is curved with a smaller radius of curvature than the release material located on the outer diameter side, and therefore tends to be subjected to compressive stress, and therefore Prone to wrinkles. The thicker the adhesive layer or adhesive sheet located between these two release materials, the greater the difference in radius of curvature between the inner diameter side release material and the outer diameter side release material in the laminated structure. The release material tends to be subjected to a large compressive stress and tends to wrinkle. Generation | occurrence | production of the wrinkle with the peeling material in the adhesive sheet winding body with a peeling material may cause unintentional peeling of the adhesive sheet from a peeling material, or partial floating, for example, and is unpreferable.

  The present invention has been conceived under the circumstances as described above, and an object thereof is to provide an adhesive sheet wound body with a release material suitable for suppressing the occurrence of wrinkles in the release material. There is.

  The wound body of the adhesive sheet with a release material provided by the present invention includes a first release material, a second release material, and a plurality of adhesive sheets. The first release material extends in one direction and has a width in a direction orthogonal to the extending direction. The plurality of adhesive sheets are arranged in a row on such a long first release material, spaced apart in the extending direction of the first release material. The second release material covers the plurality of adhesive sheets on the side opposite to the first release material. In such a laminated structure, the distance between two adjacent adhesive sheets is 30% to 150%, preferably 40% to 120%, more preferably the length of each of the adjacent adhesive sheets in the extending direction. Is 50% to 110%. At the same time, the length of each adhesive sheet in the width direction of the first release material is 10 to 100 mm, preferably 12 to 50 mm, more preferably 15 to 40 mm. In the adhesive sheet roll with the release material having such a configuration, the first and second release materials may be so-called release liners or so-called dicing tapes, respectively. In the wound body, in the laminated structure of the adhesive sheet with the release material, the second release material may be located on the inner diameter side and the first release material may be located on the outer diameter side, or the first release material May be located on the inner diameter side and the second release material may be located on the outer diameter side.

  In the adhesive sheet with a release material of the present wound body, as described above, a plurality of adhesive sheets are arranged in a line on the long first release material in the extending direction. Adjacent adhesive sheets are spaced apart between the first release material and the second release material. In this winding body in which the adhesive sheet with a release material having such a configuration takes the form of a roll, the first release material and the second release material are curved at different radii of curvature, and the adhesive sheet with the release material is in a laminated structure. The release material located on the inner diameter side is curved with a smaller radius of curvature than the release material located on the outer diameter side. At the same time, in the wound body, deformation between adjacent adhesive sheets is allowed for the regions that are not in contact with the adhesive sheet in each release material. The configuration that the adhesive sheet non-contact region in the inner diameter side release material in the laminated structure of the adhesive sheet with the release material is allowed to be deformed between adjacent adhesive sheets alleviates the compressive stress received by the inner diameter side release material. Therefore, it is suitable for suppressing generation of wrinkles in the release material.

  In the present wound body, as described above, the distance between adjacent adhesive sheets is 30% or more, preferably 40% or more, more preferably 50% or more of the length in the extending direction of each adhesive sheet. It is secured. Such a configuration secures an adhesive sheet non-contact area having a significant width for the inner diameter side release material that receives compressive stress, and realizes a significant deformation amount with respect to deformation of the area between adjacent adhesive sheets. Therefore, it is suitable for relaxing the compressive stress received by the inner diameter side release material and suppressing the generation of wrinkles in the release material. Further, from the viewpoint of realizing a high adhesive sheet arrangement density while suppressing generation of wrinkles in the release material, the separation distance between two adjacent adhesive sheets is 150 of the length in the extending direction of the adjacent adhesive sheets. % Or less, preferably 120% or less, more preferably 110% or less.

  As described above, the adhesive sheet roll with the release material of the present invention is suitable for suppressing the generation of wrinkles in the release material.

  In addition, in this wound body, the length of each adhesive sheet in the width direction of the first release material is 10 to 100 mm, preferably 12 to 50 mm, and more preferably 15 to 40 mm. In the adhesive sheet with a release material in the form of a roll, the smaller the size of the adhesive sheet, the easier the unintentional peeling of the adhesive sheet from the release material occurs. However, as described above, the wound body is suitable for suppressing the generation of wrinkles of the release material that can cause such peeling of the adhesive sheet. Therefore, this wound body is suitable for providing a small-sized adhesive sheet whose length in the width direction of the first release material is as short as described above while suppressing unintended peeling.

  Preferably, the second release material includes a plurality of release material sheets, and each release material sheet covers one adhesive sheet on the side opposite to the first release material. Moreover, in this structure, the adjacent release material sheet is preferably spaced apart. Such a configuration in which the release material that covers one surface of the adhesive sheet exists individually for each adhesive sheet is suitable for suppressing the generation of wrinkles in the release material. The reason is as follows.

  In the wound body in the preferred configuration, when the second release material, that is, a plurality of release material sheets are located on the inner diameter side in the adhesive sheet laminated structure with a release material, and the first release material is located on the outer diameter side, Although each release material sheet on the inner diameter side is curved with a smaller radius of curvature than the first release material on the outer diameter side, each release material sheet is separated from the adjacent release material sheet, so that it is adjacent to each other. The release material sheets are allowed to be displaced in the roll circumferential direction. Such a configuration is because the release material sheet on the inner diameter side in the adhesive sheet laminated structure with the release material is curved with a smaller radius of curvature than the first release material on the outer diameter side. It is suitable for relieving the compressive stress received, and therefore suitable for suppressing the generation of wrinkles in the release material sheet or the second release material. On the other hand, in the wound body having the above preferable configuration, the first release material is located on the inner diameter side in the adhesive sheet laminated structure with the release material, and the second release material, that is, the plurality of release material sheets are located on the outer diameter side. In this case, the first release material on the inner diameter side is curved with a smaller radius of curvature than the release material sheet on the outer diameter side, but each release material sheet on the outer diameter side is separated from the adjacent release material sheet. The adjacent release material sheets are allowed to displace in the roll circumferential direction. Such a configuration is caused by the fact that the first release material on the inner diameter side in the adhesive sheet laminated structure with the release material is curved with a smaller radius of curvature than the release material sheet on the outer diameter side. It is suitable for relieving the compressive stress received by the material, and therefore suitable for suppressing the occurrence of wrinkles in the first release material.

  Preferably, in the width direction of the first release material, each release material sheet extends outward from the adhesive sheet covered by the release material sheet. In the width direction of the first release material, the length of each release material sheet is preferably 110% to 200%, more preferably 115% to 190%, more preferably the length of the adhesive sheet covered by the release material sheet. 120% to 180%. The length of each release material sheet extending outward of the adhesive sheet covered by the release material sheet in the width direction of the first release material is, for example, 0.5 to 50 mm. Such a configuration is preferable for appropriately covering and protecting the adhesive sheet with the release material sheet while suppressing the design dimension in the width direction of the adhesive sheet with the release material or the first release material.

  Preferably, in the extending direction of the first release material, each release material sheet extends outward from the adhesive sheet covered by the release material sheet. In the extending direction of the first release material, the length of each release material sheet is preferably 110% to 200%, more preferably 115% to 190%, more preferably the length of the adhesive sheet covered by the release material sheet. 120% to 180%. The length of each release material sheet extending outward of the adhesive sheet covered by the release material sheet in the extending direction of the first release material is, for example, 0.15 to 40 mm. Such a configuration is preferable for appropriately covering and protecting the adhesive sheet with the release material sheet while securing the adhesive sheet arrangement density in the extending direction of the release sheet with the release material or the first release material.

  The ratio of the storage elastic modulus at 25 ° C. of the first release material to the storage elastic modulus at 25 ° C. of the second release material is the rigidity / flexibility of the first and second release materials sandwiching the adhesive sheet. From the viewpoint of balance, it is preferably 0.2 to 5, more preferably 0.3 to 3, and more preferably 0.5 to 2.5.

  Preferably, the edge of the second release material is retracted inward from the edge of the first release material in the width direction of the first release material. The retracted length is preferably 1 to 20 mm, more preferably 1.5 to 15 mm, and more preferably 2 to 10 mm. These configurations are suitable for easily peeling the second release material from the first release material with the adhesive sheet.

  The innermost diameter of the adhesive sheet roll with the release material is preferably 6 inches (15.24 cm) or less, more preferably 5 inches (12.7 cm) or less. Moreover, the innermost diameter of the adhesive sheet with the release material is, for example, 1 inch (2.54 cm) or more. Although the compressive stress received by the release material on the inner diameter side tends to be larger as the innermost diameter of the adhesive sheet with the release material of the wound body is smaller, the adhesive sheet with the release material of the wound body is The structure suitable for relieving the compressive stress received and suppressing the generation of wrinkles in the inner diameter side release material is provided as described above.

  Preferably, the length of each adhesive sheet in the extending direction is shorter than the length in the width direction. Such a configuration is suitable for preventing unintentional peeling of the adhesive sheet from the release material during transportation or handling of the wound adhesive sheet roll with the release material.

  In the adhesive sheet roll with the release material, the separation distance between adjacent adhesive sheets is preferably 1 to 50 mm, more preferably 1 to 30 mm, and more preferably 1 to 15 mm. Such a configuration is preferable in order to enjoy the above-described wrinkle suppression effect while securing the adhesive sheet arrangement density in the extending direction of the adhesive sheet with the release material or the first release material.

It is a perspective view of the adhesive sheet winding body with a release material according to one embodiment of the present invention. It is a fragmentary top view of the adhesive sheet winding body with a peeling material which concerns on one Embodiment of this invention. It is a fragmentary sectional view of the adhesion sheet winding object with a release material concerning one embodiment of the present invention. The variation of shape is expressed about an adhesive sheet. It is a fragmentary top view of one modification of an adhesive sheet with a release material. It is a fragmentary sectional view of one modification of an adhesive sheet with a release material.

  FIG. 1 shows a roll X that is a wound adhesive sheet roll with a release material according to an embodiment of the present invention. The roll X is a wound body of the adhesive sheet with a release material 10. FIG. 2 is a partial plan view of the adhesive sheet 10 with a release material, and FIG. 3 is a partial cross-sectional view of the adhesive sheet 10 with a release material.

  The adhesive sheet with release material 10 includes a long release material 11, a plurality of release materials 12, and a plurality of adhesive sheets 13. The release material 11 is an element for covering one surface of each adhesive sheet 13, extends in one direction, and has a width in a direction orthogonal to the extending direction F (shown in FIGS. 2 and 3). The plurality of adhesive sheets 13 are arranged in a row on such a long release material 11 so as to be separated in the extending direction F. Each release material 12 is a release material sheet for covering one adhesive sheet 13 on the side opposite to the release material 11. In this embodiment, the adhesive sheet with a release material 10 takes the form of a roll in which the release material 12 is positioned on the inner diameter side of the release material 11 in the laminated structure. That is, in this embodiment, the adhesive sheet 10 with a release material is wound around the winding core C in a mode or direction in which the release material 12 is positioned on the inner diameter side of the release material 11 in the laminated structure of the sheet.

  The release materials 11 and 12 in the adhesive sheet 10 with the release material can be peeled from the adhesive sheet 13 when the adhesive sheet 13 is used. Such release material 11 and / or release material 12 is, for example, a separator. As the separator, for example, a resin film or paper material in which, for example, a corona treatment and a subsequent peeling treatment are performed on the surface to which the adhesive sheet 13 is brought into close contact can be used. Examples of the resin material for forming the resin film for the separator include polyolefin and polyester. Examples of the polyolefin include low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ultra low density polyethylene, random copolymer polypropylene, block copolymer polypropylene, homopolyprolene, polybutene, polymethylpentene, Ethylene-vinyl acetate copolymer (EVA), ionomer resin, ethylene- (meth) acrylic acid copolymer, ethylene- (meth) acrylic acid ester copolymer, ethylene-butene copolymer, and ethylene-hexene copolymer Coalescence is mentioned. Examples of the polyester include polyethylene terephthalate (PET), polyethylene naphthalate, and polybutylene terephthalate (PBT). The resin film for the separator may be an unstretched film, a uniaxially stretched film, or a biaxially stretched film. Examples of the release treatment agent for the release treatment include a silicone release treatment agent, a long-chain alkyl release treatment agent, a fluorine release treatment agent, and a molybdenum sulfide release treatment. Each of the release materials 11 and 12 as a separator may be made of one kind of material, or may be made of two or more kinds of materials. The release materials 11 and 12 as the separator may have a single layer structure or a multilayer structure.

  Each release material 12 as a separator may have an alignment mark or a colored portion used when the pickup mechanism recognizes and picks up the adhesive sheet 13 together with the release material 12.

  The release material 12 may be a dicing tape having a laminated structure of a base material and an adhesive layer. When the release material 12 is a dicing tape, each release material 12 has a disk shape, for example, and contacts the adhesive sheet 13 on the pressure-sensitive adhesive layer side to cover the adhesive sheet 13.

  Each of the release materials 11 and 12 has a thickness of, for example, 25 to 200 μm. The release materials 11 and 12 may have the same thickness or different thicknesses.

  The peel force required to peel each release material 12 from each adhesive sheet 13 may be set larger or smaller than the peel force required to peel the release material 11 from the adhesive sheet 13. Good. About the magnitude relationship regarding the peeling force and the magnitude of the difference, it is appropriately set according to the usage mode of the roll X or the adhesive sheet 10 with the release material.

  The storage elastic modulus at 25 ° C. of the release materials 11 and 12 is preferably 1000 Pa or more, more preferably 1500 Pa or more, and more preferably 2000 Pa or more. The value of the ratio of the storage elastic modulus at 25 ° C. of the release material 11 to the storage elastic modulus at 25 ° C. of the release material 12 is determined from the viewpoint of the balance between the rigidity and flexibility of the release materials 11 and 12. , Preferably 0.2 to 5, more preferably 0.3 to 3, and more preferably 0.5 to 2.5. Further, the storage elastic modulus at 25 ° C. of the release material 11 (outer diameter side release material in the present embodiment) is preferably the storage elastic modulus at 25 ° C. of the release material 12 (inner diameter side release material in the present embodiment). Smaller than. In this case, the ratio of the storage elastic modulus of the release material 11 at 25 ° C. to the storage elastic modulus of the release material 12 at 25 ° C. is preferably 0.5 to 1, more preferably 0.7 to 0.00. 99, more preferably 0.8 to 0.98. The storage elastic modulus at 25 ° C. can be determined based on dynamic viscoelasticity measurement performed using a dynamic viscoelasticity measuring device (trade name “RSA III”, manufactured by TA Instruments). In this measurement, the size of the sample piece as the measurement object is 30 mm long × 10 mm wide, the distance between the chucks for holding the sample piece is 20 mm, the measurement mode is the tension mode, and the measurement temperature range is from −30 ° C. The temperature is 100 ° C., the frequency is 1 Hz, the strain is 0.1%, and the heating rate is 5 ° C./min.

  The width of the release materials 11 and 12, that is, the length in the width direction W is, for example, 5 to 100 mm, respectively. Preferably, in the width direction W, the edge of the release material 12 is retracted inward from the edge of the release material 11. The retraction length d1 is preferably 0.5 to 20 mm, more preferably 1 to 20 mm, more preferably 1 to 15 mm, more preferably 1.5 to 15 mm, and more preferably 2 to 10 mm.

  The adhesive sheet 13 in the adhesive sheet with a release material 10 is a sheet-like pressure-sensitive adhesive, and in this embodiment, may have a composition containing a thermosetting resin and, for example, a thermoplastic resin as a binder component, You may have a composition containing the thermoplastic resin with the thermosetting functional group which can produce a coupling | bonding by reacting with a hardening | curing agent. Such an adhesive sheet 13 may have a single layer structure or a multilayer structure.

  When the adhesive sheet 13 contains a thermosetting resin together with a thermoplastic resin, examples of the thermosetting resin include epoxy resins, phenol resins, amino resins, unsaturated polyester resins, polyurethane resins, silicone resins, and thermosetting resins. A functional polyimide resin. The adhesive sheet 13 may contain one type of thermosetting resin or two or more types of thermosetting resins. An epoxy resin is preferable as the thermosetting resin contained in the adhesive sheet 13 because the content of ionic impurities or the like that may cause corrosion of the adherend tends to be low. Moreover, as a hardening | curing agent of an epoxy resin, a phenol resin is preferable.

  Examples of the epoxy resin include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, brominated bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol AF type epoxy resin, and biphenyl type epoxy. Bifunctional and polyfunctional resins such as resins, naphthalene type epoxy resins, fluorene type epoxy resins, phenol novolac type epoxy resins, orthocresol novolac type epoxy resins, trishydroxyphenylmethane type epoxy resins, and tetraphenylolethane type epoxy resins An epoxy resin is mentioned. Examples of the epoxy resin include hydantoin type epoxy resin, trisglycidyl isocyanurate type epoxy resin, and glycidylamine type epoxy resin. The adhesive sheet 13 may contain one type of epoxy resin, or may contain two or more types of epoxy resins.

  Examples of the phenol resin that can act as a curing agent for the epoxy resin include novolac-type phenol resins, resol-type phenol resins, and polyoxystyrenes such as polyparaoxystyrene. Examples of the novolak type phenol resin include phenol novolak resin, phenol aralkyl resin, cresol novolak resin, tert-butylphenol novolak resin, and nonylphenol novolak resin. The adhesive sheet 13 may contain one type of phenol resin, or may contain two or more types of phenol resins.

  In the adhesive sheet 13, from the viewpoint of sufficiently proceeding the curing reaction between the epoxy resin and the phenol resin, the phenol resin preferably has a hydroxyl group in the phenol resin per equivalent of epoxy groups in the epoxy resin component. It is contained in an amount of 5 to 2.0 equivalents, more preferably 0.8 to 1.2 equivalents.

  The content of the thermosetting resin in the adhesive sheet 13 is preferably 5 to 60% by mass, more preferably 10 to 50% by mass, from the viewpoint of appropriately expressing the function as a thermosetting adhesive in the adhesive sheet 13. %.

  Examples of the thermoplastic resin contained in the adhesive sheet 13 include natural rubber, butyl rubber, isoprene rubber, chloroprene rubber, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, Examples include polybutadiene resins, polycarbonate resins, thermoplastic polyimide resins, polyamide resins such as 6-nylon and 6,6-nylon, phenoxy resins, acrylic resins, saturated polyester resins such as PET and PBT, polyamideimide resins, and fluorine resins. . The adhesive sheet 13 may contain one type of thermoplastic resin, or may contain two or more types of thermoplastic resin. As the thermoplastic resin contained in the adhesive sheet 13, an acrylic resin is preferable because it has less ionic impurities and high heat resistance, so that it is easy to ensure the bonding reliability of the adhesive sheet 13.

  When the adhesive sheet 13 contains an acrylic resin as a thermoplastic resin, the acrylic resin preferably contains the largest amount of monomer units derived from (meth) acrylic acid esters in mass ratio. “(Meth) acryl” means “acryl” and / or “methacryl”.

  Examples of (meth) acrylic acid ester for forming an acrylic resin monomer unit, that is, (meth) acrylic acid ester that is a constituent monomer of acrylic resin, include (meth) acrylic acid alkyl ester, (meth) acrylic acid cyclohexane. Examples include alkyl esters and (meth) acrylic acid aryl esters. Examples of (meth) acrylic acid alkyl esters include (meth) acrylic acid methyl ester, ethyl ester, propyl ester, isopropyl ester, butyl ester, isobutyl ester, s-butyl ester, t-butyl ester, pentyl ester, Pentyl ester, hexyl ester, heptyl ester, octyl ester, 2-ethylhexyl ester, isooctyl ester, nonyl ester, decyl ester, isodecyl ester, undecyl ester, dodecyl ester (ie lauryl ester), tridecyl ester, tetradecyl ester , Hexadecyl ester, octadecyl ester, and eicosyl ester. Examples of (meth) acrylic acid cycloalkyl ester include cyclopentyl ester and cyclohexyl ester of (meth) acrylic acid. Examples of the (meth) acrylic acid aryl ester include phenyl (meth) acrylate and benzyl (meth) acrylate. As a constituent monomer of the acrylic resin, one kind of (meth) acrylic acid ester may be used, or two or more kinds of (meth) acrylic acid esters may be used. The acrylic resin can be obtained by polymerizing raw material monomers for forming the acrylic resin. Examples of the polymerization technique include solution polymerization, emulsion polymerization, bulk polymerization, and suspension polymerization.

  The acrylic resin may contain, as a constituent monomer, one or two or more other monomers copolymerizable with (meth) acrylic acid ester, for example, in order to improve cohesive strength and heat resistance. Examples of such monomers include carboxy group-containing monomers, acid anhydride monomers, hydroxy group-containing monomers, epoxy group-containing monomers, sulfonic acid group-containing monomers, phosphate group-containing monomers, acrylamide, and acrylonitrile. Examples of the carboxy group-containing monomer include acrylic acid, methacrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, and crotonic acid. Examples of the acid anhydride monomer include maleic anhydride and itaconic anhydride. Examples of the hydroxy group-containing monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, ( Examples include 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate, and (4-hydroxymethylcyclohexyl) methyl (meth) acrylate. Examples of the epoxy group-containing monomer include glycidyl (meth) acrylate and methyl glycidyl (meth) acrylate. Examples of the sulfonic acid group-containing monomer include styrene sulfonic acid, allyl sulfonic acid, 2- (meth) acrylamide-2-methylpropane sulfonic acid, (meth) acrylamide propane sulfonic acid, and (meth) acryloyloxynaphthalene sulfonic acid. Can be mentioned. Examples of the phosphate group-containing monomer include 2-hydroxyethyl acryloyl phosphate.

  When the adhesive sheet 13 has a composition including a thermoplastic resin with a thermosetting functional group, for example, a thermosetting functional group-containing acrylic resin can be used as the thermoplastic resin. The acrylic resin for forming the thermosetting functional group-containing acrylic resin preferably contains the largest amount of monomer units derived from (meth) acrylic acid ester by mass ratio. As such (meth) acrylic acid ester, for example, the same (meth) acrylic acid ester as described above as the constituent monomer of the acrylic resin contained in the adhesive sheet 13 can be used. On the other hand, examples of the thermosetting functional group for forming the thermosetting functional group-containing acrylic resin include a glycidyl group, a carboxy group, a hydroxy group, and an isocyanate group. Of these, a glycidyl group and a carboxy group can be preferably used. That is, as the thermosetting functional group-containing acrylic resin, a glycidyl group-containing acrylic resin or a carboxy group-containing acrylic resin can be suitably used. Moreover, the hardening | curing agent which can produce a reaction with it according to the kind of thermosetting functional group in a thermosetting functional group containing acrylic resin is selected. When the thermosetting functional group of the thermosetting functional group-containing acrylic resin is a glycidyl group, as the curing agent, the same phenol resin as described above as the curing agent for epoxy resin can be used.

  In order to achieve a certain degree of cross-linking with respect to the adhesive sheet 13 before being cured for indirect wear of the adherend, for example, it reacts with the functional group at the end of the molecular chain of the resin component contained in the adhesive sheet 13. It is preferable to blend a polyfunctional compound capable of forming a bond with the resin composition for forming an adhesive sheet as a crosslinking agent. Such a configuration is suitable for improving the adhesive properties at high temperatures and for improving the heat resistance of the adhesive sheet 13. Examples of such a crosslinking agent include polyisocyanate compounds. Examples of the polyisocyanate compound include tolylene diisocyanate, diphenylmethane diisocyanate, p-phenylene diisocyanate, 1,5-naphthalene diisocyanate, and adducts of polyhydric alcohol and diisocyanate. The content of the crosslinking agent in the resin composition for forming an adhesive sheet is, for example, 0.05 to 7 parts by mass with respect to 100 parts by mass of the resin having the functional group that can react with the crosslinking agent to form a bond. Moreover, as a crosslinking agent in the adhesive sheet 13, you may use together other polyfunctional compounds, such as an epoxy resin, with a polyisocyanate compound.

  The adhesive sheet 13 may contain a filler. The blending of the filler into the adhesive sheet 13 is preferable for adjusting the storage elastic modulus of the adhesive sheet 13, the yield point strength, the breaking elongation, and the like. The shape of the filler is, for example, spherical, needle-like, or flake-like, and examples of the filler include inorganic fillers and organic fillers. As a constituent material of the inorganic filler, for example, aluminum hydroxide, magnesium hydroxide, calcium carbonate, magnesium carbonate, calcium silicate, magnesium silicate, calcium oxide, magnesium oxide, aluminum oxide, aluminum nitride, aluminum borate whisker, nitriding Examples include boron, crystalline silica, and amorphous silica. Examples of the constituent material of the inorganic filler include simple metals such as aluminum, gold, silver, copper, and nickel, alloys, amorphous carbon, and graphite. When the adhesive sheet 13 contains an inorganic filler, the content of the inorganic filler is, for example, 10% by mass or more. Examples of the constituent material of the organic filler include polymethyl methacrylate (PMMA), polyimide, polyamide imide, polyether ether ketone, polyether imide, and polyester imide. When the adhesive sheet 13 contains an organic filler, the content of the organic filler is, for example, 2% by mass or more. The adhesive sheet 13 may contain one type of filler, or may contain two or more types of filler. When the adhesive sheet 13 contains a filler, the average particle size of the filler is preferably 0.005 to 10 μm, more preferably 0.05 to 1 μm. The configuration in which the average particle size of the filler is 0.005 μm or more is suitable for realizing high wettability and adhesion to an adherend such as a semiconductor chip in the adhesive sheet 13. The structure that the average particle diameter of the said filler is 10 micrometers or less is suitable when securing the heat resistance while obtaining sufficient filler addition effect in the adhesive sheet 13. The average particle size of the filler can be determined using, for example, a photometric particle size distribution meter (trade name “LA-910”, manufactured by Horiba, Ltd.).

  The adhesive sheet 13 may contain other components as necessary. Examples of the other components include a flame retardant, a silane coupling agent, and an ion trap agent. Examples of the flame retardant include antimony trioxide, antimony pentoxide, and brominated epoxy resin. Examples of the silane coupling agent include β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, and γ-glycidoxypropylmethyldiethoxysilane. Examples of the ion trapping agent include hydrotalcites, bismuth hydroxide, hydrous antimony (for example, “IXE-300” manufactured by Toa Gosei Co., Ltd.), and zirconium phosphate having a specific structure (for example, “manufactured by Toa Gosei Co., Ltd.” IXE-100 "), magnesium silicate (for example," Kyoward 600 "manufactured by Kyowa Chemical Industry Co., Ltd.), and aluminum silicate (for example," Kyoword 700 "manufactured by Kyowa Chemical Industry Co., Ltd.). A compound capable of forming a complex with a metal ion can also be used as an ion trapping agent. Examples of such compounds include triazole compounds, tetrazole compounds, and bipyridyl compounds. Among these, a triazole compound is preferable from the viewpoint of the stability of a complex formed with a metal ion. Examples of such triazole compounds include 1,2,3-benzotriazole, 1- {N, N-bis (2-ethylhexyl) aminomethyl} benzotriazole, carboxybenzotriazole, 2- (2-hydroxy- 5-Methylphenyl) benzotriazole, 2- (2-hydroxy-3,5-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) ) -5-chlorobenzotriazole, 2- (2-hydroxy-3,5-di-t-amylphenyl) benzotriazole, 2- (2-hydroxy-5-t-octylphenyl) benzotriazole, 6- (2 -Benzotriazolyl) -4-t-octyl-6'-t-butyl-4'-methyl-2,2'-methylenebisphenol, 1- (2 ', 3'-hydroxypropyl) benzotriazole, 1- (1,2-Dicarboxydiethyl) benzo Triazole, 1- (2-ethylhexylaminomethyl) benzotriazole, 2,4-di-t-pentyl-6-{(H-benzotriazol-1-yl) methyl} phenol, 2- (2-hydroxy-5- t-butylphenyl) -2H-benzotriazole, C7-C9-alkyl-3- [3- (2H-benzotriazol-2-yl) -5- (1,1-dimethylethyl) -4-hydroxyphenyl] propion Ether, octyl-3- [3-t-butyl-4-hydroxy-5- (5-chloro-2H-benzotriazol-2-yl) phenyl] propionate, 2-ethylhexyl-3- [3-t-butyl- 4-hydroxy-5- (5-chloro-2H-benzotriazol-2-yl) phenyl] propionate, 2- (2H-benzotriazol-2-yl) -6- (1-methyl-1-phenylethyl)- 4- (1,1,3,3-tetramethylbutyl) phenol, 2- (2H-benzoto Azol-2-yl) -4-t-butylphenol, 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (2-hydroxy-5-t-octylphenyl) -benzotriazole, 2- (3 -t-butyl-2-hydroxy-5-methylphenyl) -5-chlorobenzotriazole, 2- (2-hydroxy-3,5-di-t-amylphenyl) benzotriazole, 2- (2-hydroxy-3 , 5-Di-t-butylphenyl) -5-chloro-benzotriazole, 2- [2-hydroxy-3,5-di (1,1-dimethylbenzyl) phenyl] -2H-benzotriazole, 2,2 ′ -Methylenebis [6- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol], 2- [2-hydroxy-3,5-bis (α, α -Dimethylbenzyl) phenyl] -2H-benzotriazole and methyl-3- [3- (2H-benzotriazol) R-2-yl) -5-t-butyl-4-hydroxyphenyl] propionate. In addition, a predetermined hydroxyl group-containing compound such as a quinol compound, a hydroxyanthraquinone compound, or a polyphenol compound can also be used as an ion trapping agent. Specific examples of such a hydroxyl group-containing compound include 1,2-benzenediol, alizarin, anthralphine, tannin, gallic acid, methyl gallate, and pyrogallol. As such other components, one type of component may be used, or two or more types of components may be used.

  The thickness of the adhesive sheet 13 is, for example, 5 to 300 μm, and is appropriately set according to the adhesive application required for the adhesive sheet 13.

  As described above, the plurality of adhesive sheets 13 are arranged in a row on the long release material 11 so as to be separated in the extending direction F. About each adhesive sheet 13, length L1 of the extending direction F is 3-80 mm, for example, Preferably it is 4-40 mm, More preferably, it is 5-30 mm. About each adhesive sheet 13, length L2 of the width direction W is 10-100 mm, Preferably it is 12-50 mm, More preferably, it is 15-40 mm. The length L1 in each adhesive sheet 13 is preferably shorter than the length L2.

  In the extending direction F, the separation distance D between the adjacent adhesive sheets 13 is preferably 1 to 50 mm, more preferably 2 to 30 mm, and more preferably 3 to 20 mm. All the separation distances D may or may not be the same. Further, in the extending direction F, the separation distance D between two adjacent adhesive sheets 13 is 30% to 150%, preferably 40% to 120%, of the length L1 of each adjacent adhesive sheet 13. Preferably, it is 50% to 110%.

  Each release material 12 as a release material sheet extends in the extending direction F to the outside of the adhesive sheet 13 covered by the release material 12. In the extending direction F, the length of each release material 12 is preferably 110% to 200%, more preferably 115% to 190%, more preferably 120% of the length L1 of the adhesive sheet 13 covered by the release material 12. % To 180%. In the extending direction F, the length of each release material 12 extending outward of the adhesive sheet 13 covered by the release material 12 is, for example, 0.15 to 40 mm.

  Each release material 12 as the release material sheet extends in the width direction W to the outside of the adhesive sheet 13 covered by the release material 12. In the width direction W, the length of each release material 12 is preferably 110% to 200%, more preferably 115% to 190%, more preferably 120 of the length L2 of the adhesive sheet 13 covered by the release material 12. % To 180%. In the width direction W, the length d2 of each release material 12 extending outward of the adhesive sheet 13 covered by the release material 12 is, for example, 0.5 to 50 mm.

  About the adhesive sheet 10 with a peeling material of the above structures, it can manufacture as follows, for example. First, an adhesive composition for forming the adhesive sheet 13 is applied onto the long release material 11 to form a long adhesive layer, and then a predetermined long length is formed on the adhesive layer along the adhesive layer. A separator (first separator) is stacked. Next, each adhesive sheet 13 having a predetermined shape is formed on the release material 11 by a punching process in which a processing blade is inserted from the first separator side to the release material 11. Next, the adhesive layer material portion between the first separator and the adhesive sheet 13 is removed from the release material 11 while leaving the formed adhesive sheet 13 on the release material 11. Next, another long separator (second separator) is laminated on the plurality of adhesive sheets 13 so as to cover the plurality of adhesive sheets 13 that are arranged separately on the long release material 11. Next, the release material 12 having a predetermined shape is formed by punching the second separator, and the second separator material portion between the release materials 12 is removed. For example, the adhesive sheet with a release material 10 can be manufactured as described above.

  The adhesive sheet 10 with the release material thus manufactured is wound around the winding core C to form the roll X as described above. The diameter of the winding core C, that is, the innermost diameter R of the roll X is preferably 6 inches (15.24 cm) or less, more preferably 5 inches (12.7 cm) or less. The innermost diameter R of the roll X is, for example, 1 inch (2.54 cm) or more. Examples of the constituent material of the winding core C include plastic materials and paper materials. Examples of the plastic material for the winding core C include acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene-vinyl acetate copolymer.

  The roll X or the adhesive sheet 10 with a release material is used as follows, for example, in the manufacturing process of a semiconductor device. First, an adhesive sheet 10 with a release material is fed from a roll X at a predetermined speed, and immediately before pickup by a pickup mechanism from an adhesive sheet 13 with a release material 12 that is conveyed on a long release material 11. The release material 11 is peeled off. The adhesive sheet 13 with the release material 12 from which the release material 11 has been peeled off is picked up by the pickup mechanism. Next, the adhesive sheet 13 with the release material 12 is attached to the predetermined surface of the semiconductor chip on the adhesive sheet 13 side. Next, the release material 12 is peeled from the adhesive sheet 13 on the semiconductor chip. Next, the semiconductor chip with the adhesive sheet 13 is bonded to a predetermined mounting substrate. Thereafter, the adhesive sheet 13 is thermally cured between the mounting substrate and the semiconductor chip as necessary, and thereby the semiconductor chip is bonded to the mounting substrate. In the manufacturing process of the semiconductor device, for example, the roll X or the adhesive sheet with a release material 10 is used as described above.

  In the adhesive sheet 10 with the release material of the roll X as described above, as described above, the plurality of adhesive sheets 13 are arranged in a row on the long release material 11 while being separated in the extending direction. In the roll X of the adhesive sheet with release material 10 having such a configuration, in this embodiment, the release material 11 and the release material 12 are curved with different radii of curvature, and the inner diameter side in the laminated structure of the adhesive sheet with release material 10 The release material 12 positioned at is curved with a smaller radius of curvature than the release material 11 positioned on the outer diameter side. At the same time, in the roll X, deformation between the adjacent adhesive sheets 13 is allowed in the areas where the release materials 11 and 12 are not in contact with the adhesive sheet 13. Regarding the adhesive sheet non-contact area in the release material 12 on the inner diameter side in the laminated structure of the adhesive sheet 10 with the release material, the deformation between the adjacent adhesive sheets 13 is allowed. It is suitable for relieving the compressive stress received, and therefore suitable for suppressing the generation of wrinkles in the release material 12.

  Further, in the roll X, as described above, the separation distance D between the adjacent adhesive sheets 13 is 30% or more of the length L1 (length in the extending direction F) of each adhesive sheet 13, preferably 40% or more. More preferably, it is ensured widely to 50% or more. Such a configuration secures an adhesive sheet non-contact region having a significant width for the release material 12 on the inner diameter side that receives compressive stress, and provides a significant amount of deformation with respect to the deformation of the region between the adjacent adhesive sheets 13. Therefore, it is suitable for reducing the compressive stress received by the release material 12 and suppressing the generation of wrinkles in the release material 12. Further, as described above, the distance D between the two adjacent adhesive sheets 13 is 150% or less of the length L1 (the length in the extending direction F) of the adjacent adhesive sheets 13, and preferably 120. % Or less, more preferably 110% or less. Such a configuration is suitable for realizing a high adhesive sheet arrangement density while suppressing generation of wrinkles in the release material 12.

  In addition, in this embodiment, although the release material 12 itself as the release material sheet on the inner diameter side is curved with a smaller radius of curvature than the release material 11 on the outer diameter side, each release material 12 is adjacent to the next release material. Since they are separated from the material 12, the adjacent release materials 12 are allowed to be displaced in the circumferential direction of the roll X. Such a configuration is because the release material 12 on the inner diameter side in the laminated structure with the release sheet 10 with the release material is curved with a smaller radius of curvature than the release material 11 on the outer diameter side. It is suitable for relaxing the compressive stress received, and therefore suitable for suppressing the generation of wrinkles in the release material 12. On the other hand, even when the winding direction of the adhesive sheet 10 with the release material in the roll X is opposite to that of the present embodiment, it is possible to obtain a wrinkle suppressing effect. When the adhesive sheet 10 with the release material is wound so that the release material 11 is positioned on the inner diameter side and the release material 12 is positioned on the outer diameter side in the laminated structure of the adhesive sheet 10 with the release material, Although the release material 11 is curved with a smaller radius of curvature than the release material 12 on the outer diameter side, each release material 12 on the outer diameter side is separated from the adjacent release material 12. The displacement which leaves | separates in the roll circumferential direction is permitted. Such a configuration results from the release material 11 on the inner diameter side in the laminated structure of the adhesive sheet 10 with the release material being curved with a smaller radius of curvature than the release material 12 on the outer diameter side. Therefore, it is suitable for alleviating the compressive stress applied to the release material 11 and, therefore, suitable for suppressing the generation of wrinkles in the release material 11.

  As described above, the roll X, that is, the wound body of the adhesive sheet with a release material 10 is suitable for suppressing generation of wrinkles in the release material.

  In such a roll X, the length L2 of each adhesive sheet 13 in the width direction W of the release material-attached adhesive sheet 10 to the release materials 11 and 12 is 10 to 100 mm as described above, and preferably 12 to 50 mm. More preferably, it is 15-40 mm. In the adhesive sheet with a release material in the form of a roll, the smaller the size of the adhesive sheet, the easier the unintentional peeling of the adhesive sheet from the release material occurs. However, as described above, the roll X is suitable for suppressing the generation of wrinkles of the release material that may cause such peeling of the adhesive sheet 13. Therefore, the roll X is suitable for providing the small-sized adhesive sheet 13 whose length L2 in the width direction W is short as described above while suppressing unintended peeling.

  As described above, in the width direction W of the release material 11, each release material 12 extends outward of the adhesive sheet 13 that covers the release material 11, and in the width direction W, the length of each release material 12 covers it. The length L2 of the adhesive sheet 13 is preferably 110% to 200%, more preferably 115% to 190%, and more preferably 120% to 180%. Such a configuration is preferable for appropriately covering and protecting the adhesive sheet 13 with the release material 12 while suppressing the design dimension in the width direction of the adhesive sheet 10 with the release material.

  As described above, in the extending direction F of the release material 11, each release material 12 extends outward of the adhesive sheet 13 that covers the release material 11, and in the extension direction F, the length of each release material 12 covers it. The length L1 of the adhesive sheet 13 is preferably 110% to 200%, more preferably 115% to 190%, and more preferably 120% to 180%. Such a configuration is preferable for appropriately covering and protecting the adhesive sheet 13 with the release material 12 while ensuring the adhesive sheet arrangement density in the extending direction F of the release sheet-attached adhesive sheet 10 to the release material 11.

  As described above, the ratio of the storage elastic modulus at 25 ° C. of the release material 11 to the storage elastic modulus at 25 ° C. of the release material 12 is preferably 0.5 to 1, more preferably 0.7 to. It is 0.99, more preferably 0.8 to 0.98. Such a configuration is suitable for suppressing the generation of wrinkles on the release material 11 located on the outer diameter side and the release material 12 located on the inner diameter side in the above-described adhesive sheet 10 with the release material.

  As described above, the edge of the release material 12 is retracted inward from the edge of the release material 11 in the width direction W of the release material 11. The retraction length d1 is preferably 0.5 to 20 mm, more preferably 1 to 20 mm, more preferably 1 to 15 mm, more preferably 1.5 to 15 mm, and more preferably 2 to 10 mm. These configurations are suitable for facilitating peeling of the release material 12 from the release material 11 with the adhesive sheet 13.

  The innermost diameter of the adhesive sheet 10 roll X with a release material is preferably 6 inches (15.24 cm) or less, more preferably 5 inches (12.7 cm) or less. Moreover, the innermost diameter of the adhesive sheet 10 with the release material is, for example, 1 inch (2.54 cm) or more. Although the compressive stress received by the release material on the inner diameter side tends to increase as the innermost diameter of the adhesive sheet 10 with the release material of roll X is smaller, the adhesive sheet 10 with the release material of roll X is compressed by the release material of the inner diameter side. The structure suitable for relieving stress and suppressing the generation of wrinkles in the inner diameter side release material is provided as described above.

  As described above, in each adhesive sheet 13, the length L1 in the extending direction F is shorter than the length L2 in the width direction W. Such a configuration is suitable for preventing unintentional peeling of the adhesive sheet 13 from the release materials 11 and 12 during transportation or handling of the roll X or the adhesive sheet 10 with the release material.

  As described above, in the adhesive sheet with release material 10 or the roll X, the separation distance between the adjacent adhesive sheets 13 is preferably 1 to 50 mm, more preferably 1 to 30 mm, and more preferably 1 to 15 mm. Such a configuration is preferable in order to enjoy the above-described wrinkle suppressing effect while ensuring the adhesive sheet arrangement density in the extending direction of the adhesive sheet with release material 10 to the release material 11.

  FIG. 4 shows variations of the shape (planar shape) of the adhesive sheet 13. The planar view shape of the adhesive sheet 13 may be a square as shown in FIG. As shown in FIG. 4B, the adhesive sheet 13 may have a shape in which a triangular shape located at both ends in the width direction W and a rectangle therebetween are combined. As shown in FIG. 4C, the adhesive sheet 13 may have a shape in which a trapezoidal shape located at both ends in the width direction W and a rectangle therebetween are combined. Moreover, as shown in FIG.4 (d), the planar view shape of the adhesive sheet 13 may be circular.

  5 and 6 show an adhesive sheet with a release material 10A, which is a modification of the adhesive sheet with a release material.

  The adhesive sheet with a release material 10 </ b> A includes a long release material 11, a long release material 12 </ b> A, and a plurality of adhesive sheets 13. The adhesive sheet with a release material 10A is different from the above-described adhesive sheet with a release material 10 in that a long release material 12A is provided instead of the plurality of release materials 12 as a release material sheet. The release material 12 </ b> A in the adhesive sheet with release material 10 </ b> A is an element for covering each adhesive sheet 13 on the side opposite to the release material 11, and extends in one direction similarly to the release material 11. In the form of the roll X shown in FIG. 1, the release sheet-attached adhesive sheet 10 </ b> A takes the form of a roll in which the release material 12 </ b> A is positioned on the inner diameter side of the release material 11 in the laminated structure. Regarding the release material 12A, the constituent material, the thickness, the length in the width direction W, the relative length to the adhesive sheet 13 in the width direction W, the storage elastic modulus at 25 ° C., and the release material 11 with respect to the storage elastic modulus at 25 ° C. The value of the storage elastic modulus ratio and the length of inward retraction from the edge of the release material 11 are the same as described above with respect to the release material 12. Moreover, about the other structure regarding 10 A of adhesive sheets with a release material, it is the same as that mentioned above regarding the adhesive sheet 10 with a release material.

  In the adhesive sheet 10 </ b> A with a release material, a plurality of adhesive sheets 13 are arranged in a row on the long release material 11 so as to be separated in the extending direction. Adjacent adhesive sheets 13 are spaced apart between the release material 11 and the release material 12A. In the roll X of the adhesive sheet with a release material 10A having such a configuration, the release material 11 and the release material 12A are curved with different radii of curvature, and the release material is positioned on the inner diameter side in the laminated structure of the adhesive sheet with the release material 10A. 12A is curved with a smaller radius of curvature than the release material 11 located on the outer diameter side. At the same time, in the roll X, deformation between the adjacent adhesive sheets 13 is allowed in the areas where the release materials 11 and 12A are not in contact with the adhesive sheet 13. The configuration in which the adhesive sheet non-contact region in the inner diameter side release material 12A in the laminated structure of the adhesive sheet with release material 10A is allowed to deform between the adjacent adhesive sheets 13 is received by the inner diameter side release material 12A. Suitable for relieving the compressive stress, and therefore suitable for suppressing the generation of wrinkles in the release material 12A.

  In the adhesive sheet 10A with the release material, as in the adhesive sheet 10 with the release material, the separation distance D between the adjacent adhesive sheets 13 is 30% or more of the length L1 in the extending direction F of each adhesive sheet 13, preferably Is widely secured at 40% or more, more preferably 50% or more. Such a configuration ensures an adhesive sheet non-contact area having a significant width with respect to the release member 12A on the inner diameter side subjected to compressive stress, and provides a significant amount of deformation with respect to the deformation of the area between the adjacent adhesive sheets 13. Therefore, it is suitable for realizing, and therefore, it is suitable for reducing the compressive stress received by the release material 12A on the inner diameter side and suppressing the generation of wrinkles in the release material 12A. Such a configuration is suitable for realizing a high adhesive sheet arrangement density while suppressing generation of wrinkles in the release material 12A.

  As described above, the release sheet-attached adhesive sheet 10A roll X of the present invention is suitable for suppressing the generation of wrinkles in the release material.

  In addition, in the adhesive sheet 10A with the release material, the length of each adhesive sheet 13 in the width direction of the release material 11 is 10 to 100 mm, preferably 12 to 12 as in the adhesive sheet 10 with the release material. 50 mm, more preferably 15 to 40 mm. In the adhesive sheet with a release material in the form of a roll, the smaller the size of the adhesive sheet, the easier the unintentional peeling of the adhesive sheet from the release material occurs. However, the roll X of the release sheet-attached adhesive sheet 10 </ b> A is suitable for suppressing the generation of wrinkles of the release material that may cause such peeling of the adhesive sheet 13. Therefore, the roll X is suitable for providing the small-sized adhesive sheet 13 whose length in the width direction W is short as described above while suppressing unintended peeling.

X roll (winding body of adhesive sheet with release material)
10, 10A Adhesive sheet with release material 11 Release material (first release material)
12, 12A Release material (second release material)
13 Adhesive sheets L1, L2 Length D Separation distance F Extension direction W Width direction

Claims (12)

A long first release material extending in one direction and having a width in a direction perpendicular to the extending direction;
A plurality of adhesive sheets that are spaced apart in the extending direction of the first release material and arranged in a row on the first release material, and each length in the width direction is 10 to 100 mm; and
A second release material that covers the plurality of adhesive sheets on the side opposite to the first release material;
The distance between two adjacent adhesive sheets is a wound body of the adhesive sheet with a release material, which is 30% to 150% of the length in the extending direction of each of the adjacent adhesive sheets.   The adhesive sheet with a release material according to claim 1, wherein the second release material includes a plurality of release material sheets, and each release material sheet covers one adhesive sheet on a side opposite to the first release material. Winding body.   The wound body of the adhesive sheet with a release material according to claim 2, wherein each release material sheet extends outward of the adhesive sheet covered by the release material sheet in the width direction.   The wound body of the adhesive sheet with a release material according to claim 3, wherein the length of each release material sheet is 110% to 200% of the length of the adhesive sheet covered by the release material sheet in the width direction.   The wound body of the adhesive sheet with a release material according to any one of claims 2 to 4, wherein each release material sheet extends outward of the adhesive sheet covered by the release material sheet in the extending direction. .   The wound body of the adhesive sheet with a release material according to claim 5, wherein in the extending direction, the length of each release material sheet is 110% to 200% of the length of the adhesive sheet covered by the release material sheet.   The value of the ratio of the storage elastic modulus at 25 ° C of the first release material to the storage elastic modulus at 25 ° C of the second release material is 0.2 to 5. The wound body of the adhesive sheet with a release material according to one.   The adhesive with a release material according to any one of claims 1 to 7, wherein an edge of the second release material is retracted inward from an edge of the first release material in the width direction. Sheet roll.   The wound body of the adhesive sheet with a release material according to claim 8, wherein the retracted length is 1 to 20 mm.   The wound body of the adhesive sheet with a release material according to any one of claims 1 to 9, wherein the innermost diameter is 6 inches or less.   The wound body of the adhesive sheet with a release material according to any one of claims 1 to 10, wherein a length in the extending direction of each adhesive sheet is shorter than a length in the width direction.   The wound body of the adhesive sheet with a release material according to any one of claims 1 to 11, wherein the separation distance between adjacent adhesive sheets is 1 to 50 mm.

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