WO2016103381A1 - Pressure-sensitive adhesive sheet - Google Patents

Pressure-sensitive adhesive sheet Download PDF

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Publication number
WO2016103381A1
WO2016103381A1 PCT/JP2014/084250 JP2014084250W WO2016103381A1 WO 2016103381 A1 WO2016103381 A1 WO 2016103381A1 JP 2014084250 W JP2014084250 W JP 2014084250W WO 2016103381 A1 WO2016103381 A1 WO 2016103381A1
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net
pressure
sensitive adhesive
fibers
flatness
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PCT/JP2014/084250
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French (fr)
Japanese (ja)
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木村　光一
徹 田口
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光洋産業株式会社
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Priority to PCT/JP2014/084250 priority Critical patent/WO2016103381A1/en
Priority to JP2016565742A priority patent/JP6667455B2/en
Priority to CN201480082258.9A priority patent/CN107207915B/en
Publication of WO2016103381A1 publication Critical patent/WO2016103381A1/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers

Abstract

A pressure-sensitive adhesive sheet (10) which includes a release film (11) and in which a net (12) has been superposed so that one surface thereof faces the release film (11) and a foamed base (13) that is expandable and flexible has been superposed so as to face the other surface of the net. The sheet (10) is configured so that a pressure-sensitive adhesive layer (14) having been interposed between the release film and the net is applied to the whole surface of the release film, which faces the net, and fills in the openings (12a) of the net, and thereby the release film and the net are laminated. The net comprises a single-layer net-shaped object (12b) configured of warp fibers (12c) and weft fibers (12d) that are each constituted of a thermoplastic resin and have been disposed in a lattice arrangement. When the thickness and width of each warp fiber are respectively expressed by A1 and B1 and the thickness and width of each weft fiber are respectively expressed by A2 and B2, then the flatness B1/A1 is in the range of 10-60 and the flatness B2/A2 is 60 or less.

Description

粘着シートAdhesive sheet
　本発明は、伸張性及び可撓性のある発泡性基材を有する粘着シートに関するものである。 The present invention relates to an adhesive sheet having a stretchable and flexible foamable substrate.
　従来、この種の粘着シートとして、剥離フィルムにフィルム側粘着剤層が剥離可能に積層接着され、このフィルム側粘着剤層にネットの一方の面が積層接着され、更にこのネットの他方の面に基材側粘着剤層を介して伸張性及び可撓性のある発泡性基材が積層接着された粘着シートが開示されている（例えば、特許文献１参照。）。この粘着シートでは、フィルム側粘着剤層が剥離フィルムの一方の面全体に塗布されてネットの網目を塞ぐように構成される。またフィルム側粘着剤層のうちネットの網目から発泡性基材側にはみ出した粘着剤により基材側粘着剤層が構成される。 Conventionally, as this type of pressure-sensitive adhesive sheet, the film-side pressure-sensitive adhesive layer is laminated and adhered to the release film so that the film-side pressure-sensitive adhesive layer can be peeled, and one side of the net is laminated and adhered to the film-side pressure-sensitive adhesive layer. A pressure-sensitive adhesive sheet in which a stretchable and flexible foamable base material is laminated and bonded via a base material-side pressure-sensitive adhesive layer is disclosed (for example, see Patent Document 1). In this pressure-sensitive adhesive sheet, the film-side pressure-sensitive adhesive layer is applied to the entire one surface of the release film so as to close the mesh of the net. Moreover, a base material side adhesive layer is comprised by the adhesive which protruded in the foaming base material side from the net of the film side adhesive layer.
　このように構成された粘着シートでは、剥離フィルムにフィルム側粘着剤層を剥離可能に積層接着し、このフィルム側粘着剤層にネットを積層接着することにより、フィルム側粘着剤層がネットの網目を塞ぐとともに、フィルム側粘着剤層のうちネットの網目から発泡性基材側にはみ出した粘着剤により基材側粘着剤層を構成したので、粘着シートの他の部材への接着力を低下させることがなく、かつフィルム側粘着剤層及び基材側粘着剤層となる粘着剤の塗布装置を単純化できる。またネットにより発泡性基材の伸張性が抑制されるので、発泡性基材の寸法安定性に優れ、粘着シートの他の部材への貼付作業を極めて容易に行うことができる。 In the pressure-sensitive adhesive sheet thus configured, the film-side pressure-sensitive adhesive layer is laminated and adhered to the release film so that the film-side pressure-sensitive adhesive layer can be peeled off, and the net is laminated and adhered to the film-side pressure-sensitive adhesive layer. Since the base-side pressure-sensitive adhesive layer is composed of the adhesive on the film-side pressure-sensitive adhesive layer that protrudes from the net of the net to the foamable base-material side, the adhesive strength of the pressure-sensitive adhesive sheet to other members is reduced. In addition, it is possible to simplify the pressure-sensitive adhesive coating apparatus that becomes the film-side pressure-sensitive adhesive layer and the substrate-side pressure-sensitive adhesive layer. Moreover, since the extensibility of a foamable base material is suppressed by a net, it is excellent in the dimensional stability of a foamable base material, and the sticking operation | work to the other member of an adhesive sheet can be performed very easily.
　また、互いに糸間間隙をおいて平行に配列されたたて糸及びよこ糸を含む糸条により構成された粗目シートが熱可塑性重合体により被覆されるか又は被覆されていない粗目織物状基布からなり、この粗目シートの片面上にホットメルト型接着剤層が形成された通風性シート補修用シートが開示されている（例えば、特許文献２参照。）。この通風性シート補修用シートでは、粗目シート内糸条が、粗目シートの平面に平行に偏平な断面形状を有する。また糸条の偏平な断面形状において、そのシート平面に平行な方向における長さ（L1）と、シート平面に直角な方向における長さ（L2）との比が、１．３：１～７：１である。 Further, the coarse sheet composed of the yarns including the warp and the weft arranged in parallel with a gap between the yarns is composed of a coarse woven base fabric coated with or not coated with the thermoplastic polymer, An air-permeable sheet repair sheet in which a hot-melt adhesive layer is formed on one surface of the coarse sheet is disclosed (for example, see Patent Document 2). In this ventilated sheet repair sheet, the yarn in the coarse sheet has a flat cross-sectional shape parallel to the plane of the coarse sheet. Further, in the flat cross-sectional shape of the yarn, the ratio of the length (L 1 ) in the direction parallel to the sheet plane to the length (L 2 ) in the direction perpendicular to the sheet plane is 1.3: 1 to 7: 1.
　このように構成された通風性シート補修用シートでは、糸条が扁平な断面形状を有するため、適度の柔軟性と屈曲性とを有するとともに、増大した被覆性と減少した嵩高性とを有する。 In the air-permeable sheet repairing sheet thus configured, the yarn has a flat cross-sectional shape, so that it has moderate flexibility and flexibility, and increased coverage and decreased bulkiness.
特開２００９－２８０７９６号公報（請求項１、段落［００１０］、図１）JP 2009-280796 A (Claim 1, paragraph [0010], FIG. 1) 特開昭６１－１２６１９２号公報（請求項１、４及び５、明細書第５頁左上欄第７行～同頁同欄第１４行）JP-A-61-126192 (Claims 1, 4 and 5, specification, page 5, upper left column, line 7 to same page, same column, line 14)
　しかし、上記従来の特許文献１に示された粘着シートでは、たて糸及びよこ糸の横断面が略円形状であるネットを用いると、この粘着シートを貼付する被着面の曲率半径が小さい場合、粘着シートの一部が被着面から浮く不具合があった。また、上記従来の特許文献２に示された通風性シート補修用シートでは、糸条の偏平な断面形状において、シート平面に平行な方向における長さ（L1）と、シート平面に直角な方向における長さ（L2）との比が、１．３：１～７：１であるため、即ち糸条の扁平度L1／L2が１．３～７と小さいため、この補修用シートを貼付する被着面の曲率半径が小さい場合、補修用シートの一部が被着面から浮く問題点があった。 However, in the pressure-sensitive adhesive sheet disclosed in Patent Document 1 above, if a net having a substantially circular cross section of the warp and weft is used, if the radius of curvature of the adherend surface to which the pressure-sensitive adhesive sheet is attached is small, the pressure-sensitive adhesive sheet There was a problem that a part of the sheet floated from the adherend surface. Further, in the ventilated sheet repair sheet disclosed in the above-mentioned conventional patent document 2, the length (L 1 ) in the direction parallel to the sheet plane and the direction perpendicular to the sheet plane in the flat cross-sectional shape of the yarn Since the ratio to the length (L 2 ) is 1.3: 1 to 7: 1, that is, the flatness L 1 / L 2 of the yarn is as small as 1.3 to 7, this repair sheet In the case where the radius of curvature of the adherend surface to which is attached is small, there is a problem that a part of the repair sheet floats from the adherend surface.
　本発明の目的は、被着面が曲率半径の小さい曲面であっても、この被着面から剥がれ難く、被着面への添い性が良好である、粘着シートを提供することにある。 An object of the present invention is to provide a pressure-sensitive adhesive sheet that is difficult to peel off from the adherend surface and has good adherence to the adherend surface even when the adherend surface is a curved surface having a small curvature radius.
　本発明の第１の観点は、図１～図３に示すように、剥離フィルム１１と、この剥離フィルム１１に一方の面が対向するように積層されたネット１２と、このネット１２の他方の面に対向するように積層された伸張性及び可撓性のある発泡性基材１３と、剥離フィルム１１及びネット１２間に介装されておりかつ剥離フィルム１１及びネット１２を積層接着する粘着剤層１４とを備え、粘着剤層１４が剥離フィルム１１のネット１２への対向面全体に塗布されかつネット１２の網目１２ａを塞ぐように構成された粘着シートにおいて、ネット１２が熱可塑性樹脂からなるたて繊維１２ｃとよこ繊維１２ｄが格子状に配列した一重の網状体１２ｂからなり、たて繊維１２ｃの横断面における厚さ及び幅をそれぞれＡ1及びＢ1とし、よこ繊維１２ｄの横断面における厚さ及び幅をそれぞれＡ2及びＢ2とするとき、たて繊維１２ｃの扁平度Ｂ1／Ａ1が１０～６０の範囲内にあり、よこ繊維１２ｄの扁平度Ｂ2／Ａ2が６０以下であることを特徴とする。 The first aspect of the present invention is that, as shown in FIGS. 1 to 3, a release film 11, a net 12 laminated so that one surface faces the release film 11, and the other of the net 12 An expandable and flexible foamable base material 13 laminated so as to face the surface, and an adhesive that is interposed between the release film 11 and the net 12 and laminates and adheres the release film 11 and the net 12 A pressure-sensitive adhesive sheet that is applied to the entire surface of the release film 11 facing the net 12 and closes the mesh 12a of the net 12, and the net 12 is made of a thermoplastic resin. consists longitudinal fibers 12c Toyoko fiber 12d lattice shape to an arrayed double meshwork 12b, the thickness and width of the cross section of the longitudinal fibers 12c and a 1 and B 1 respectively, transverse fibers 12d When the thickness and the width in the cross section of A are respectively A 2 and B 2 , the flatness B 1 / A 1 of the warp fibers 12c is in the range of 10 to 60, and the flatness B 2 / A 2 is 60 or less.
　本発明の第２の観点は、図６～図８に示すように、剥離フィルム１１と、この剥離フィルム１１に一方の面が対向するように積層されたネット６０と、このネット６０の他方の面に対向するように積層された伸張性及び可撓性のある発泡性基材１３と、剥離フィルム１１及びネット６０間に介装されておりかつ剥離フィルム１１及びネット６０を積層接着する粘着剤層１４とを備え、粘着剤層１４が剥離フィルム１１のネット６０への対向面全体に塗布されかつネット６０の網目を塞ぐように構成された粘着シートにおいて、ネット６０が熱可塑性樹脂からなるたて繊維６１ａ，６２ａとよこ繊維６１ｂ，６２ｂが格子状に配列した二重の第１及び第２網状体６１，６２からなり、第１網状体６１のたて繊維６１ａ及びよこ繊維６１ｂと第２網状体６２のたて繊維６２ａ及びよこ繊維６２ｂとが互いに同一線上に重ならず、第１網状体６１のたて繊維６１ａの横断面における厚さ及び幅をそれぞれａ1及びｂ1とし、第１網状体６１のよこ繊維６１ｂの横断面における厚さ及び幅をそれぞれａ2及びｂ2とし、第２網状体６２のたて繊維６２ａの横断面における厚さ及び幅をそれぞれａ3及びｂ3とし、第２網状体６２のよこ繊維６２ｂの横断面における厚さ及び幅をそれぞれａ4及びｂ4とするとき、第１網状体６１のたて繊維６１ａの扁平度ｂ1／ａ1及び第１網状体６１のよこ繊維６１ｂの扁平度ｂ2／ａ2が同一でありかつ１０～６０の範囲内にあり、第２網状体６２のたて繊維６２ａの扁平度ｂ3／ａ3及び第２網状体６２のよこ繊維６２ｂの扁平度ｂ4／ａ4が同一でありかつ６０以下であることを特徴とする。 As shown in FIGS. 6 to 8, the second aspect of the present invention is a release film 11, a net 60 laminated on the release film 11 so that one surface faces the other, and the other of the net 60. An expandable and flexible foamable base material 13 laminated so as to face the surface, and an adhesive that is interposed between the release film 11 and the net 60 and laminates and adheres the release film 11 and the net 60 In the pressure-sensitive adhesive sheet comprising the layer 14, the pressure-sensitive adhesive layer 14 is applied to the entire surface of the release film 11 facing the net 60 and is configured to close the mesh of the net 60, the net 60 is made of a thermoplastic resin. The fibers 61a and 62a and the weft fibers 61b and 62b are composed of double first and second mesh bodies 61 and 62 arranged in a lattice pattern. The warp fibers 61a and the weft fibers 61b of the first mesh body 61 and the second Without overlapping on longitudinal fibers 62a and transverse fibers 62b and the same line with each other in the shaped body 62, and the thickness and width of the cross section of the longitudinal fibers 61a of the first net member 61 and a 1 and b 1, respectively, the The thickness and width in the cross section of the weft fiber 61b of the first net 61 are a 2 and b 2 respectively, and the thickness and width in the cross section of the warp fiber 62a of the second net 62 are a 3 and b 3 , respectively. and then, when the thickness and width of the cross section of the transverse fibers 62b of the second net member 62 and a 4 and b 4, respectively, the flatness of the vertical fibers 61a of the first net member 61 b 1 / a 1 and the The flatness b 2 / a 2 of the weft fibers 61b of the first mesh 61 is the same and in the range of 10 to 60, and the flatness b 3 / a 3 of the warp fibers 62a of the second mesh 62 and the first flatness b of transverse fibers 62b of 2 meshwork 62 4 / a 4 are the same and Characterized in that it is less than or equal to zero.
　本発明の第３の観点は、第１又は第２の観点に基づく発明であって、更に図１に示すように、発泡性基材１３の４０％圧縮時の圧縮硬さが５～２００Ｎ／３１４ｃｍ2であることを特徴とする。 A third aspect of the present invention is an invention based on the first or second aspect, and as shown in FIG. 1, the compressive hardness of the foamable substrate 13 at 40% compression is 5 to 200 N / It is 314 cm 2 .
　本発明の第４の観点は、第１又は第２の観点に基づく発明であって、更に図１及び図３に示すように、たて繊維１２ｃの扁平度Ｂ1／Ａ1が１５～４０であり、よこ繊維１２ｄの扁平度Ｂ2／Ａ2が４０以下であることを特徴とする。 A fourth aspect of the present invention is an invention based on the first or second aspect, and as shown in FIGS. 1 and 3, the flatness B 1 / A 1 of the warp fibers 12c is 15-40. The flatness B 2 / A 2 of the weft fibers 12d is 40 or less.
　本発明の第５の観点は、第２の観点に基づく発明であって、更に図６及び図８に示すように、第１網状体６１のたて繊維６１ａの扁平度ｂ1／ａ1及び第１網状体６１のよこ繊維６１ｂの扁平度ｂ2／ａ2が同一でありかつ１５～４０であり、第２網状体のたて繊維の扁平度ｂ3／ａ3及び第２網状体のよこ繊維の扁平度ｂ4／ａ4が同一でありかつ４０以下であることを特徴とする。 A fifth aspect of the present invention is an invention based on the second aspect, and further, as shown in FIGS. 6 and 8, the flatness b 1 / a 1 of the warp fibers 61a of the first mesh body 61 and The flatness b 2 / a 2 of the weft fibers 61b of the first mesh 61 is the same and 15 to 40, and the flatness b 3 / a 3 of the warp fibers of the second mesh and the second mesh The flatness b 4 / a 4 of the weft fibers is the same and 40 or less.
　本発明の第１の観点の粘着シートでは、可撓性のあるネットの網状体のたて繊維の扁平度Ｂ1／Ａ1が１０～６０の範囲内と比較的大きいので、この粘着シートを一方向に曲率半径の小さい曲面を有する被着面に、たて繊維がこの曲面に添って湾曲するように貼付しても、粘着シートが被着面から剥がれ難く、粘着シートの被着面への添い性が良好である。 In the pressure-sensitive adhesive sheet according to the first aspect of the present invention, the flatness B 1 / A 1 of the warp fibers of the flexible net-like body is relatively large in the range of 10 to 60. Even if affixed to a surface having a curved surface with a small radius of curvature in one direction so that the warp fibers are curved along the curved surface, the pressure-sensitive adhesive sheet is difficult to peel off from the surface to be adhered, and the surface to be adhered to the pressure-sensitive adhesive sheet. Is easy to attach.
　一方、可撓性のあるネットの網状体のよこ繊維の扁平度Ｂ2／Ａ2を６０以下としたので、よこ繊維の扁平度Ｂ2／Ａ2がたて繊維の扁平度Ｂ1／Ａ1より小さい１０未満である場合を含む。しかし、よこ繊維の扁平度Ｂ2／Ａ2が１０未満であっても、粘着シートを一方向に曲率半径の小さい曲面を有する被着面に、たて繊維がこの曲面に添って湾曲するように貼付すると、よこ繊維が曲面の稜線に添って直線上に延びた状態で貼付されるので、よこ繊維が粘着シートの被着面への添い性に影響せず、粘着シートの被着面への添い性が良好に保たれる。 On the other hand, since the flexible flat of B 2 / A 2 of transverse fibers of the meshwork of the net was 60 or less, the transverse fibers of the flat of B 2 / A 2 ye flatness of the fiber Te B 1 / A including those which are less than 1 less than 10. However, even if the flatness B 2 / A 2 of the weft fibers is less than 10, the warp fibers are curved along the curved surface with the adhesive sheet having a curved surface with a small radius of curvature in one direction. Since the weft fibers are affixed in a straight line along the curved ridgeline, the weft fibers do not affect the adherence of the pressure-sensitive adhesive sheet to the surface to be adhered to the pressure-sensitive adhesive sheet. The adhering property is kept good.
　本発明の第２の観点の粘着シートでは、可撓性のあるネットの第１網状体のたて繊維の扁平度ｂ1／ａ1及びよこ繊維の扁平度ｂ2／ａ2が同一でありかつ１０～６０の範囲内と比較的大きいので、この粘着シートを一方向に曲率半径の小さい曲面を有する被着面に、第１網状体のたて繊維がこの曲面に添って湾曲するように貼付したり、或いは第１網状体のよこ繊維がこの曲面に添って湾曲するように貼付しても、粘着シートが被着面から剥がれ難く、粘着シートの被着面への添い性が良好である。 In the pressure-sensitive adhesive sheet according to the second aspect of the present invention, the flatness b 1 / a 1 of the first net of the flexible net and the flatness b 2 / a 2 of the weft fiber are the same. Since the pressure-sensitive adhesive sheet has a curved surface with a small curvature radius in one direction, the warp fibers of the first mesh body are curved along the curved surface. Even if it is affixed or the weft fiber of the first mesh body is affixed so as to bend along this curved surface, the adhesive sheet is difficult to peel off from the adherend surface, and the adherence to the adherent surface of the adhesive sheet is good is there.
　一方、可撓性のあるネットの第２網状体のたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4が同一でありかつ６０以下としたので、第２網状体のたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4は、第１網状体のたて繊維の扁平度ｂ1／ａ1及びよこ繊維の扁平度ｂ2／ａ2より小さい１０未満である場合を含む。第２網状体のたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4が１０未満であっても、粘着シートを一方向に曲率半径の小さい曲面を有する被着面に、第１網状体のたて繊維又はよこ繊維がこの曲面に添って湾曲するように貼付すると、第２網状体が粘着シートの被着面への添い性に影響せず、粘着シートの被着面への添い性が良好に保たれる。また、網状体を二重にすることで、発泡性基材の伸張性が更に制御されるので、第１の観点の粘着シートよりも寸法安定性に優れる。 On the other hand, since the flatness b 3 / a 3 of the second fiber of the flexible net and the flatness b 4 / a 4 of the weft fiber are the same and 60 or less, the second mesh The flatness b 3 / a 3 of the warp fibers of the body and the flatness b 4 / a 4 of the weft fibers are the flatness b 1 / a 1 of the warp fibers of the first reticular body and the flatness b 2 of the weft fibers. / A 2 less than 10 is included. Even when the flatness b 3 / a 3 of the warp fibers of the second network and the flatness b 4 / a 4 of the weft fibers are less than 10, the adhesive sheet has a curved surface with a small curvature radius in one direction. When the warp fibers or weft fibers of the first mesh body are attached to the surface so as to bend along the curved surface, the second mesh body does not affect the adherence to the adherend surface of the adhesive sheet, Good adherence to the adherend surface is maintained. Moreover, since the extensibility of a foamable base material is further controlled by making a network body double, it is excellent in dimensional stability rather than the adhesive sheet of a 1st viewpoint.
本発明第１実施形態の粘着シートを圧締する前後の状態を示す断面構成図である。It is a cross-sectional block diagram which shows the state before and behind pressing the adhesive sheet of 1st Embodiment of this invention. その粘着シートに用いられるネットの一部分を示す平面図である。It is a top view which shows a part of net | network used for the adhesive sheet. その粘着シートに用いられるネットの一部分を示す斜視図である。It is a perspective view which shows a part of net | network used for the adhesive sheet. 本発明の実施の形態、実施例及び比較例の粘着シートの添い性（添い角度）を比較するための試験方法を示す概念図である。It is a conceptual diagram which shows the test method for comparing the attachment property (attachment angle) of the adhesive sheet of embodiment, an Example, and a comparative example of this invention. その粘着シートを製造する工程を示す製造装置の構成図である。It is a block diagram of the manufacturing apparatus which shows the process of manufacturing the adhesive sheet. 本発明第２実施形態の粘着シートを圧締する前後の状態を示す断面構成図である。It is a cross-sectional block diagram which shows the state before and behind pressing the adhesive sheet of 2nd Embodiment of this invention. その粘着シートに用いられるネットの一部分を示す平面図である。It is a top view which shows a part of net | network used for the adhesive sheet. その粘着シートに用いられるネットの一部分を示す斜視図である。It is a perspective view which shows a part of net | network used for the adhesive sheet. 本発明の第３の実施の形態のネットの一部分を示す平面図である。It is a top view which shows a part of net | network of the 3rd Embodiment of this invention.
　次に本発明を実施するための形態を図面に基づいて説明する。 Next, modes for carrying out the present invention will be described with reference to the drawings.
　＜第１の実施の形態＞
　図１に示すように、粘着シート１０は、剥離フィルム１１と、この剥離フィルム１１に一方の面が対向するように積層されたネット１２と、このネット１２の他方の面に対向するように積層された伸張性及び可撓性のある発泡性基材１３と、剥離フィルム１１及びネット１２間に介装されておりかつ剥離フィルム１１及びネット１２を積層接着する粘着剤層１４とを備える。上記粘着剤層１４は剥離フィルム１１のネット１２への対向面全体に塗布されかつネット１２の網目１２ａを塞ぐように構成される。また剥離フィルム１１は、図示しないが粘着剤層１４が積層接着される面に目止め剤層を介してシリコーン系の剥離剤層を形成した紙やポリプロピレン等により構成される。この剥離剤層の存在により剥離フィルム１１が粘着剤層１４から容易に剥がれるようになっている。更に上記剥離フィルム１１、粘着剤層１４、ネット１２及び発泡性基材１３を積層した状態（図１（ａ））で圧締することにより、粘着剤層１４がネット１２の網目１２ａに進入して充填され、粘着剤層１４が発泡性基材１３に圧着される（図１（ｂ））。 <First Embodiment>
As shown in FIG. 1, the pressure-sensitive adhesive sheet 10 is laminated so as to face the release film 11, the net 12 laminated so that one surface faces the release film 11, and the other surface of the net 12. And a foamable base material 13 having extensibility and flexibility, and a pressure-sensitive adhesive layer 14 interposed between the release film 11 and the net 12 and laminating and bonding the release film 11 and the net 12. The pressure-sensitive adhesive layer 14 is applied to the entire surface of the release film 11 facing the net 12 and is configured to close the mesh 12a of the net 12. Although not shown, the release film 11 is made of paper, polypropylene, or the like in which a silicone release agent layer is formed on the surface to which the pressure-sensitive adhesive layer 14 is laminated and bonded via a sealant layer. Due to the presence of the release agent layer, the release film 11 is easily peeled off from the pressure-sensitive adhesive layer 14. Further, the pressure-sensitive adhesive layer 14 enters the mesh 12a of the net 12 by pressing in the state where the release film 11, the pressure-sensitive adhesive layer 14, the net 12 and the foamable base material 13 are laminated (FIG. 1A). The pressure-sensitive adhesive layer 14 is pressure-bonded to the foamable substrate 13 (FIG. 1B).
　ネット１２は、この実施の形態では、熱可塑性樹脂からなるたて繊維１２ｃとよこ繊維１２ｄが格子状に配列した一重の網状体１２ｂからなる。具体的には、ネット１２は、熱可塑性樹脂からなるたて繊維１２ｃ及びよこ繊維１２ｄを編んだ後に熱圧着して形成された一重の網状体１２ｂがそのまま用いられる。熱可塑性樹脂としては、ポリエチレン、ポリプロピレン等のポリオレフィン、ポリエチレンテレフタレート、ポリアミド、ポリビニルアルコール、ポリアクリロニトリル、ポリウレタン、含ハロゲン系ポリマー等が挙げられる。また、この実施の形態では、ネット１２が一重の網状体１２ｂからなるため、ネット１２の網目１２ａは網状体１２ｂの開口部１２ｅに一致する。更に、網状体１２ｂの開口部１２ｅは略正方形状であることが好ましい。 In this embodiment, the net 12 is composed of a single reticulated body 12b in which warp fibers 12c and weft fibers 12d made of a thermoplastic resin are arranged in a lattice pattern. Specifically, the net 12 is a single reticulated body 12b formed by thermocompression bonding after knitting warp fibers 12c and weft fibers 12d made of thermoplastic resin. Examples of the thermoplastic resin include polyolefins such as polyethylene and polypropylene, polyethylene terephthalate, polyamide, polyvinyl alcohol, polyacrylonitrile, polyurethane, and halogen-containing polymers. Further, in this embodiment, since the net 12 is composed of a single net 12b, the net 12a of the net 12 coincides with the opening 12e of the net 12b. Furthermore, the opening 12e of the mesh body 12b is preferably substantially square.
　ネット１２を構成する網状体１２ｂのたて繊維１２ｃの横断面における厚さ及び幅をそれぞれＡ1及びＢ1とするとき、たて繊維１２ｃの扁平度Ｂ1／Ａ1は、１０～６０、好ましくは１５～４０の範囲内に設定される（図１～図３）。また、ネット１２を構成する網状体１２ｂのよこ繊維１２ｄの横断面における厚さ及び幅をそれぞれＡ2及びＢ2とするとき、よこ繊維１２ｄの扁平度Ｂ2／Ａ2は、６０以下、好ましくは４０以下、より好ましくは１０～６０の範囲内、更に好ましくは１５～４０の範囲内に設定される。ここで、たて繊維１２ｃの扁平度Ｂ1／Ａ1を１０～６０の範囲内に限定したのは、１０未満では後述するネット１２の添い角度が小さくなり過ぎてネット１２が発泡性基材１３から浮いてしまいネット１２の発泡性基材１３に対する密着性が低下し、６０を超えると網状体１２ｂの開口部１２ｅが少なくなり過ぎて粘着剤層１４の発泡性基材１３に対する粘着力が低下し、扁平度が１０未満の場合と同様に添い角度試験においてネット１２が発泡性基材１３が浮いてしまうからである。また、よこ繊維１２ｄの扁平度Ｂ2／Ａ2を６０以下に限定したのは、６０を超えると網状体１２ｂの開口部１２ｅが少なくなり過ぎて粘着剤層１４の発泡性基材１３に対する粘着力が低下するからである。 When the thickness and width in the cross section of the warp fibers 12c of the mesh 12b constituting the net 12 are A 1 and B 1 respectively, the flatness B 1 / A 1 of the warp fibers 12c is 10 to 60, Preferably, it is set within the range of 15 to 40 (FIGS. 1 to 3). Further, when the thickness and width in the cross section of the weft fiber 12d of the mesh body 12b constituting the net 12 are respectively A 2 and B 2 , the flatness B 2 / A 2 of the weft fiber 12d is 60 or less, preferably Is set to 40 or less, more preferably in the range of 10 to 60, and still more preferably in the range of 15 to 40. Here, the flatness B 1 / A 1 of the warp fibers 12c is limited to the range of 10 to 60. If it is less than 10, the net 12 will be too small and the net 12 will become too foamable. 13, the adhesion of the net 12 to the foamable base material 13 is reduced, and when it exceeds 60, the openings 12 e of the mesh body 12 b become too small and the adhesive force of the adhesive layer 14 to the foamable base material 13 is increased. This is because the net 12 is floated and the foamable base material 13 is floated in the included angle test as in the case where the flatness is less than 10. Further, the flatness B 2 / A 2 of the weft fibers 12d is limited to 60 or less. If the flatness B 2 / A 2 exceeds 60, the openings 12e of the mesh body 12b become too small and the adhesive layer 14 adheres to the foamable substrate 13. This is because power is reduced.
　また、網状体１２ｂの開口部１２ｅのよこ方向の長さをＧ1（ｍｍ）とするとき、Ｇ1は３～７ｍｍの範囲内に設定されることが好ましい。また、網状体１２ｂの開口部１２ｅのたて方向の長さをＧ2（ｍｍ）とするとき、Ｇ2は３～７ｍｍの範囲内に設定されることが好ましい。更に、網状体１２ｂのたて繊維１２ｃ及びよこ繊維１２ｄの厚さはそれぞれ２～１００μｍの範囲内に設定されることが好ましく、２０～８０μｍの範囲内に設定されることが更に好ましい。ここで、開口部１２ｅのよこ方向の長さＧ1及び開口部１２ｅのたて方向の長さＧ2をそれぞれ３～７ｍｍの範囲内に限定したのは、３ｍｍ未満では粘着剤層１４の発泡性基材１３に対する粘着力が低下してしまい、７ｍｍを超えるとネット１２を積層しても発泡性基材１３の寸法安定性が向上しないからである。また、網状体１２ｂのたて繊維１２ｃ及びよこ繊維１２ｄの厚さをそれぞれ２～１００μｍの範囲内に限定したのは、２μｍ未満ではネット１２が薄すぎるため製造工程において皺が入り易くなり、１００μｍを超えるとネット１２が粘着剤層１４よりも厚くなり、発泡性基材１３と粘着剤層１４との密着性が悪くなるからである。 Further, when the length of the opening 12e of the mesh body 12b in the width direction is G 1 (mm), G 1 is preferably set in the range of 3 to 7 mm. Further, when the length of the opening 12e of the mesh body 12b in the vertical direction is G 2 (mm), G 2 is preferably set within a range of 3 to 7 mm. Further, the thickness of the warp fibers 12c and the weft fibers 12d of the reticulated body 12b is preferably set in the range of 2 to 100 μm, more preferably in the range of 20 to 80 μm. Here, the length G 1 in the width direction of the opening 12e and the length G 2 in the vertical direction of the opening 12e are limited to the range of 3 to 7 mm, respectively. This is because the adhesive strength to the expandable substrate 13 is reduced, and if it exceeds 7 mm, the dimensional stability of the foamable substrate 13 is not improved even if the net 12 is laminated. In addition, the thickness of the warp fibers 12c and the weft fibers 12d of the reticulated body 12b is limited to the range of 2 to 100 μm, respectively. If the thickness is less than 2 μm, the net 12 is too thin and wrinkles easily occur in the manufacturing process. This is because the net 12 becomes thicker than the pressure-sensitive adhesive layer 14 and the adhesion between the foamable base material 13 and the pressure-sensitive adhesive layer 14 is deteriorated.
　図４にネット１２の添い角度の測定方法を示す。先ず幅及び長さをそれぞれ５０ｍｍ及び３００ｍｍに切り出す。この際、ネット１２のたて繊維１２ｃが長さ３００ｍｍの方向になるように切り出す。次に粘着シート１０を、直径１００ｍｍ又は２５ｍｍの円柱体１６の外周面に粘着シート１０の発泡性基材１３面が円柱体１６に接するように半周分だけ巻き付ける。この際、予め円柱体１６の外周面に貼っておいた両面粘着テープ１７により、粘着シート１０の発泡性基材１３を円柱体１６の外周面にその半周分だけ密着させる。更に粘着シート１０の発泡性基材１３面を円柱体１６に密着させた状態で、粘着シート１０の剥離フィルム１１を剥がし、１分間放置した後に、ネット１２が発泡性基材１３から剥がれずに、発泡性基材１３に接触する部分の角度θ1を測定する。この角度をネット１２の添い角度θ1とする。この添い角度θ1が大きくなるほど、即ち１８０度に近づくほど添い性が良好であり、小さくなるほど添い性が低下する。 FIG. 4 shows a method for measuring the incident angle of the net 12. First, the width and length are cut out to 50 mm and 300 mm, respectively. At this time, the warp fibers 12c of the net 12 are cut out in a direction of 300 mm in length. Next, the pressure-sensitive adhesive sheet 10 is wound by a half circumference so that the foamable base material 13 surface of the pressure-sensitive adhesive sheet 10 is in contact with the cylindrical body 16 around the outer peripheral surface of the cylindrical body 16 having a diameter of 100 mm or 25 mm. At this time, the foamable base material 13 of the pressure-sensitive adhesive sheet 10 is brought into close contact with the outer peripheral surface of the cylindrical body 16 by the half circumference by the double-sided pressure-sensitive adhesive tape 17 previously pasted on the outer peripheral surface of the cylindrical body 16. Furthermore, in a state where the surface of the foamable base material 13 of the pressure-sensitive adhesive sheet 10 is in close contact with the cylindrical body 16, the release film 11 of the pressure-sensitive adhesive sheet 10 is peeled off and left for 1 minute, and then the net 12 is not peeled off from the foamable base material 13. Then, the angle θ 1 of the portion in contact with the foamable substrate 13 is measured. This angle is defined as an attachment angle θ 1 of the net 12. As the attachment angle θ 1 increases, that is, as the angle approaches 180 degrees, the attachment property becomes better, and as the attachment angle θ 1 decreases, the attachment property decreases.
　一方、粘着剤層１４の原料となる粘着剤２１（図５）としては、加熱下において粘着性を示しかつ室温において優れた接着性を発揮するＥＶＡ系ホットメルト型接着剤、ゴム系ホットメルト型接着剤、アクリルエマルジョン、ＥＶＡエマルジョン、ＳＢＲエマルジョン、酢酸ビニル系エマルジョン等の水性粘着剤、及びアクリル系、ＥＶＡ系、ＳＢＲ系、酢酸ビニル系等の溶剤系粘着剤などが用いられる。また発泡性基材１３としては、伸張性及び可撓性を有するＥＰＤＭ（Ethylene Propylene Diene Terpolymer）フォーム、ウレタンフォーム、ポリエチレンフォーム等が用いられる。この発泡性基材１３の４０％圧縮時の圧縮硬さは、５～２００Ｎ／３１４ｃｍ2の範囲内に設定されることが好ましい。ここで、発泡性基材１３の４０％圧縮時の圧縮硬さの好ましい範囲を５～２００Ｎ／３１４ｃｍ2の範囲内に限定したのは、５Ｎ／３１４ｃｍ2未満では発泡性基材１３が柔らか過ぎて粘着シート１０から剥離フィルム１１を剥離できず、２００Ｎ／３１４ｃｍ2を超えると発泡性基材１３が硬過ぎてネット１２と発泡性基材１３との密着性が悪くなるからである。 On the other hand, as the pressure-sensitive adhesive 21 (FIG. 5) used as the raw material of the pressure-sensitive adhesive layer 14, an EVA hot-melt adhesive or rubber-based hot-melt adhesive that exhibits adhesiveness under heating and exhibits excellent adhesion at room temperature. Aqueous adhesives such as adhesives, acrylic emulsions, EVA emulsions, SBR emulsions, and vinyl acetate emulsions, and solvent-based adhesives such as acrylic, EVA, SBR, and vinyl acetate are used. Further, as the foamable base material 13, EPDM (Ethylene Propylene Diene Terpolymer) foam, urethane foam, polyethylene foam or the like having extensibility and flexibility is used. The compression hardness of the foamable substrate 13 at 40% compression is preferably set in the range of 5 to 200 N / 314 cm 2 . Here, the preferable range of the compression hardness at the time of 40% compression of the foamable substrate 13 is limited to the range of 5 to 200 N / 314 cm 2. The foamable substrate 13 is too soft if it is less than 5 N / 314 cm 2. This is because the release film 11 cannot be peeled from the pressure-sensitive adhesive sheet 10 and exceeds 200 N / 314 cm 2 , so that the foamable base material 13 is too hard and the adhesion between the net 12 and the foamable base material 13 deteriorates.
　このように構成された粘着シート１０の製造方法の一例を図１及び図５に基づいて説明する。但し、この製造方法に限定されるものではない。先ず剥離フィルム１１の一方の面全体に粘着剤２１（図５）を塗布した後に、粘着剤２１を乾燥機２２（図５）で乾燥することにより、粘着剤２１が粘着剤層１４となって、剥離フィルム１１上に粘着剤層１４が積層される。次に剥離フィルム１１の一方の面、即ち粘着剤層１４が積層された面に、ネット１２を積層する。これにより粘着剤層１４が剥離フィルム１１に剥離可能に接着されるとともに、ネット１２の一方の面が粘着剤層１４に接着される。この状態でネット１２の他方の面に発泡性基材１３を積層する（図１（ａ））。更に積層された剥離フィルム１１、粘着剤層１４、ネット１２及び発泡性基材１３をロール２３，２３にて圧締する。これにより粘着剤層１４がネット１２の網目１２ａに進入して充填され、粘着剤層１４が発泡性基材１３に圧着される（図１（ｂ））。このように製造された粘着シート１０では、粘着剤２１をネット１２の両面に塗布することなく、剥離フィルム１１の一方の面に塗布するだけで、剥離フィルム１１、粘着剤層１４、ネット１２及び発泡性基材１３の積層体からなる粘着シート１０を製造できる。この結果、粘着シート１０の製造工程における粘着剤２１の塗布装置を単純化できる。 An example of a method for manufacturing the pressure-sensitive adhesive sheet 10 configured as described above will be described with reference to FIGS. 1 and 5. However, it is not limited to this manufacturing method. First, after the pressure-sensitive adhesive 21 (FIG. 5) is applied to one whole surface of the release film 11, the pressure-sensitive adhesive 21 becomes the pressure-sensitive adhesive layer 14 by drying the pressure-sensitive adhesive 21 with a dryer 22 (FIG. 5). The pressure-sensitive adhesive layer 14 is laminated on the release film 11. Next, the net 12 is laminated on one surface of the release film 11, that is, the surface on which the pressure-sensitive adhesive layer 14 is laminated. Thereby, the pressure-sensitive adhesive layer 14 is detachably bonded to the release film 11, and one surface of the net 12 is bonded to the pressure-sensitive adhesive layer 14. In this state, the foamable base material 13 is laminated on the other surface of the net 12 (FIG. 1A). Further, the laminated release film 11, the pressure-sensitive adhesive layer 14, the net 12 and the foamable base material 13 are pressed with rolls 23 and 23. As a result, the pressure-sensitive adhesive layer 14 enters and fills the mesh 12a of the net 12, and the pressure-sensitive adhesive layer 14 is pressure-bonded to the foamable substrate 13 (FIG. 1B). In the pressure-sensitive adhesive sheet 10 manufactured in this manner, the release film 11, the pressure-sensitive adhesive layer 14, the net 12, and the adhesive film 21 can be applied to only one surface of the release film 11 without applying the pressure-sensitive adhesive 21 to both sides of the net 12. The pressure-sensitive adhesive sheet 10 made of a laminate of the foamable substrate 13 can be manufactured. As a result, the coating device for the adhesive 21 in the manufacturing process of the adhesive sheet 10 can be simplified.
　このように製造された粘着シート１０では、可撓性のあるネット１２の網状体１２ｂのたて繊維１２ｃの扁平度Ｂ1／Ａ1が１０～６０の範囲内と比較的大きいので、この粘着シート１０を一方向に曲率半径の小さい曲面を有する被着面に、たて繊維１２ｃがこの曲面に添って湾曲するように貼付しても、粘着シート１０が被着面から剥がれ難く、粘着シート１０の被着面への添い性が良好である。一方、可撓性のあるネット１２の網状体１２ｂのよこ繊維１２ｄの扁平度Ｂ2／Ａ2を６０以下としたので、よこ繊維１２ｄの扁平度Ｂ2／Ａ2がたて繊維１２ｃの扁平度Ｂ1／Ａ1より小さい１０未満である場合を含む。しかし、よこ繊維１２ｄの扁平度Ｂ2／Ａ2が１０未満であっても、粘着シート１０を一方向に曲率半径の小さい曲面を有する被着面に、たて繊維１２ｃがこの曲面に添って湾曲するように貼付すると、よこ繊維１２ｄが曲面の稜線に添って直線上に延びた状態で貼付されるので、よこ繊維１２ｄが粘着シート１０の被着面への添い性に影響せず、粘着シート１０の被着面への添い性が良好に保たれる。 In the pressure-sensitive adhesive sheet 10 manufactured in this way, the flatness B 1 / A 1 of the warp fibers 12c of the mesh 12b of the flexible net 12 is relatively large in the range of 10 to 60. Even if the sheet 10 is attached to the adherend surface having a curved surface with a small radius of curvature in one direction so that the warp fibers 12c are curved along the curved surface, the adhesive sheet 10 is hardly peeled off from the adherend surface. The adherence to the 10 adherend surface is good. On the other hand, since the flexible reticulated flatness of the transverse fiber 12d of the body 12b B 2 / A 2 nets 12 was 60 or less, the flatness B 2 / A 2 ye Te fibers 12c of transverse fibers 12d flat Including the case of less than 10 less than the degree B 1 / A 1 . However, even if the flatness B 2 / A 2 of the weft fibers 12d is less than 10, the adhesive sheet 10 is attached to the adherend surface having a curved surface with a small curvature radius in one direction, and the warp fibers 12c follow this curved surface. If it is pasted so as to be curved, the weft fibers 12d are pasted in a state of extending along a curved ridge line so that the weft fibers 12d do not affect the adherence of the pressure-sensitive adhesive sheet 10 to the adherend surface. Adhesiveness to the adherend surface of the sheet 10 is kept good.
　＜第２の実施の形態＞
　図６～図８は本発明の第２の実施の形態を示す。図６において図１と同一符号は同一部品を示す。この実施の形態では、ネット６０が熱可塑性樹脂からなるたて繊維６１ａ，６２ａとよこ繊維６１ｂ，６２ｂが格子状に配列した二重の第１及び第２網状体６１，６２からなる。また、第１網状体６１のたて繊維６１ａ及びよこ繊維６１ｂと第２網状体６２のたて繊維６２ａ及びよこ繊維６２ｂとが互いに同一線上に重ならないように構成される。 <Second Embodiment>
6 to 8 show a second embodiment of the present invention. 6, the same reference numerals as those in FIG. 1 denote the same components. In this embodiment, the net 60 is composed of double first and second reticulate bodies 61 and 62 in which warp fibers 61a and 62a and weft fibers 61b and 62b are made of thermoplastic resin and arranged in a lattice pattern. Further, the warp fibers 61a and the weft fibers 61b of the first mesh body 61 and the warp fibers 62a and the weft fibers 62b of the second mesh body 62 are configured not to overlap each other.
　上記ネット６０を作製するには、先ず第１の実施の形態の網状体と同様に、熱可塑性樹脂からなるたて繊維６１ａ，６２ａ及びよこ繊維６１ｂ，６２ｂをそれぞれ編んだ後に熱圧着して第１及び第２網状体６１，６２を作製する。次に第２網状体６２を第１網状体６１に対して平行移動することにより、第１網状体６１のたて繊維６１ａ及びよこ繊維６１ｂと第２網状体６２のたて繊維６２ａ及びよこ繊維６２ｂとが互いに同一線上に重ならないように、第１及び第２網状体６１，６２を積層する。更にこの積層された第１及び第２網状体６１，６２を熱圧着する。このようにしてネット６０が作製される。また、この実施の形態では、ネット６０が二重の第１及び第２網状体６１，６２からなるため、ネット６０の網目は、第１及び第２網状体６１，６２の開口部６１ｃ，６２ｃに一致しない。また、ネット６０の網目及び網状体６１，６２の開口部６１ｃ，６２ｃは、それぞれ略正方形状であることが好ましい。 In order to fabricate the net 60, first, similarly to the net of the first embodiment, the warp fibers 61a and 62a and the weft fibers 61b and 62b made of thermoplastic resin are knitted and then thermocompression bonded. 1 and 2nd nets 61 and 62 are produced. Next, the second mesh body 62 is translated relative to the first mesh body 61, whereby the warp fibers 61 a and the weft fibers 61 b of the first mesh body 61 and the warp fibers 62 a and the weft fibers of the second mesh body 62. The first and second nets 61 and 62 are stacked so that the line 62b does not overlap with each other. Furthermore, the laminated first and second mesh bodies 61 and 62 are thermocompression bonded. In this way, the net 60 is produced. In this embodiment, since the net 60 is composed of the double first and second nets 61 and 62, the mesh of the net 60 is the openings 61c and 62c of the first and second nets 61 and 62. Does not match. Moreover, it is preferable that the mesh | network of the net | network 60 and the opening parts 61c and 62c of the net- like bodies 61 and 62 are substantially square shapes, respectively.
　なお、ネットは次の方法で作製してもよい。先ず２層構造のフィルムを切開機により切り開いて広幅にする。次いで上記広幅のフィルムを、一次延伸機により温浴中で所定倍率に延伸する。次に二次延伸機により熱風中で更にフィルムを所定倍率に延伸する。この縦延伸工程によりフィルムは割れ易くなる。更に延伸されたフィルムを割繊具により縦方向に割繊する。これにより、割繊されたフィルムは規則的に網目状になる。割繊されたフィルムが拡幅装置により横方向に所定の幅又は目合いに拡幅され縦ウエブとなる。 In addition, you may produce a net with the following method. First, a film having a two-layer structure is opened by a cutting machine to make it wide. Next, the wide film is stretched at a predetermined magnification in a warm bath by a primary stretching machine. Next, the film is further stretched at a predetermined ratio in hot air by a secondary stretching machine. The film is easily broken by this longitudinal stretching step. Further, the stretched film is split in the vertical direction by a splitting tool. Thereby, the split film is regularly reticulated. The split film is widened to a predetermined width or mesh in the horizontal direction by a widening device to form a vertical web.
　一方、別の３層構造のフィルムを圧延ロールにより所定倍率に圧延し縦方向に配向する。フィルムを圧延により１．１～５倍程度に伸長させる。これによりフィルムの長さは圧延に応じた分だけ伸長されるので、ライン速度が速くなる。次に縦伸長及び縦配向工程で配向されたフィルムをスリッタ及び受けロール間に導入し、フィルムの両側を除く部分に横方向に沿うスリットを形成する。次に横方向にスリットが形成されたフィルムを、横延伸装置により横方向に延伸する。これによりフィルムは、網状に形成され横ウエブとなる。 On the other hand, another three-layer film is rolled to a predetermined ratio with a rolling roll and oriented in the longitudinal direction. The film is stretched about 1.1 to 5 times by rolling. As a result, the length of the film is extended by an amount corresponding to the rolling, so that the line speed is increased. Next, the film oriented in the longitudinal stretching and longitudinal orientation steps is introduced between the slitter and the receiving roll, and slits are formed along the transverse direction at portions other than both sides of the film. Next, the film in which slits are formed in the transverse direction is stretched in the transverse direction by a transverse stretching apparatus. As a result, the film is formed in a net shape to become a horizontal web.
　そして、上記縦ウエブと上記横ウエブとを積層ロールと導入ロールとの間に導入する。このとき横ウエブをクロスガイダ等により横方向に緊張された状態で導入する。この緊張された状態の横ウエブの上に、縦ウエブが適当な張力下で導入され横ウエブを積層ロールに押付ける。これにより縦ウエブが横ウエブを積層ロールに押付け、次いで排出ロールで圧着する。この間に、横ウエブは適切な熱処理がなされる。これによりネットが製造される。 Then, the vertical web and the horizontal web are introduced between the laminated roll and the introduction roll. At this time, the horizontal web is introduced in a state of being tensioned in the horizontal direction by a cross guider or the like. On this tensioned horizontal web, a vertical web is introduced under appropriate tension, and the horizontal web is pressed against the laminating roll. As a result, the vertical web presses the horizontal web against the laminated roll, and then crimps with the discharge roll. During this time, the transverse web is subjected to an appropriate heat treatment. Thereby, a net is manufactured.
　ネット６０を構成する第１網状体６１のたて繊維６１ａの横断面における厚さ及び幅をそれぞれａ1及びｂ1とし、第１網状体６１のよこ繊維６１ｂの横断面における厚さ及び幅をそれぞれａ2及びｂ2とするとき、第１網状体６１のたて繊維６１ａの扁平度ｂ1／ａ1及びよこ繊維６１ｂの扁平度ｂ2／ａ2は、同一であり、かつ１０～６０、好ましくは１５～４０の範囲内に設定される（図６～図８）。また、ネット６０を構成する第２網状体６２のたて繊維６２ａの横断面における厚さ及び幅をそれぞれａ3及びｂ3とし、第２網状体６２のよこ繊維６２ｂの横断面における厚さ及び幅をそれぞれａ4及びｂ4とするとき、第２網状体６２のたて繊維６２ａの扁平度ｂ3／ａ3及びよこ繊維６２ｂの扁平度ｂ4／ａ4は、同一であり、かつ６０以下、好ましくは４０以下、より好ましくは１０～６０の範囲内、更に好ましくは１５～４０の範囲内に設定される。ここで、第１網状体６１のたて繊維６１ａの扁平度ｂ1／ａ1及びよこ繊維６１ｂの扁平度ｂ2／ａ2を１０～６０の範囲内にそれぞれ限定したのは、１０未満では後述するネット６０の添い角度が小さくなり過ぎてネット６０が発泡性基材１３から浮いてしまいネット６０の発泡性基材１３に対する密着性が低下し、６０を超えるとネット６０の網目が少なくなり過ぎて粘着剤層１４の発泡性基材１３に対する粘着力が低下し、扁平度が１０未満の場合と同様に添い角度試験においてネット１２が発泡性基材１３から浮いてしまうからである。また、第２網状体６２のたて繊維６２ａの扁平度ｂ3／ａ3及びよこ繊維６２ｂの扁平度ｂ4／ａ4を６０以下にそれぞれ限定したのは、６０を超えるとネット６０の網目が少なくなり過ぎて粘着剤層１４の発泡性基材１３に対する粘着力が低下し、扁平度が１０未満の場合と同様に添い角度試験においてネット１２が発泡性基材１３から浮いてしまうからである。 The thickness and width in the cross section of the warp fiber 61a of the first net 61 constituting the net 60 are a 1 and b 1 respectively, and the thickness and width in the cross section of the weft fiber 61b of the first net 61 are The flatness b 1 / a 1 of the warp fiber 61a of the first mesh 61 and the flatness b 2 / a 2 of the weft fiber 61b are the same, and 10-60, where a 2 and b 2 respectively. It is preferably set within the range of 15 to 40 (FIGS. 6 to 8). Further, the thickness and width in the cross section of the warp fiber 62a of the second mesh 62 constituting the net 60 are a 3 and b 3 respectively, and the thickness and width in the cross section of the weft fiber 62b of the second mesh 62 are When the widths are a 4 and b 4 respectively, the flatness b 3 / a 3 of the warp fibers 62a of the second mesh 62 and the flatness b 4 / a 4 of the weft fibers 62b are the same and 60 In the following, it is preferably set to 40 or less, more preferably in the range of 10 to 60, and still more preferably in the range of 15 to 40. Here, the flatness b 1 / a 1 of the warp fibers 61a of the first mesh 61 and the flatness b 2 / a 2 of the weft fibers 61b are limited to the range of 10 to 60, respectively, when less than 10. The net 60, which will be described later, becomes too small, and the net 60 floats from the foamable base material 13 and the adhesion of the net 60 to the foamable base material 13 decreases. This is because the adhesive strength of the pressure-sensitive adhesive layer 14 to the foamable base material 13 is reduced, and the net 12 is lifted from the foamable base material 13 in the addition angle test as in the case where the flatness is less than 10. The flatness b 3 / a 3 of the warp fibers 62a of the second mesh 62 and the flatness b 4 / a 4 of the weft fibers 62b are limited to 60 or less, respectively. This is because the adhesive strength of the pressure-sensitive adhesive layer 14 to the foamable base material 13 decreases and the net 12 floats from the foamable base material 13 in the addition angle test as in the case where the flatness is less than 10. is there.
　ネット６０の第１網状体６１の開口部６１ｃのよこ方向の長さ及びたて方向の長さをそれぞれｇ1（ｍｍ）及びｇ2（ｍｍ）とするとき、ｇ1及びｇ2は３～７ｍｍの範囲内に設定されることが好ましい。また、ネット６０の第２網状体６２の開口部６２ｃのよこ方向の長さ及びたて方向の長さをそれぞれｇ3（ｍｍ）及びｇ4（ｍｍ）とするとき、ｇ3及びｇ4は３～７ｍｍの範囲内に設定されることが好ましい。更に、第１網状体６１のたて繊維６１ａ及びよこ繊維６１ｂの厚さ、及び第２網状体６２のたて繊維６２ａ及びよこ繊維６２ｂの厚さは、それぞれ２～１００μｍの範囲内に設定されることが好ましく、２０～８０μｍの範囲内に設定されることが更に好ましい。ここで、第１網状体６１の開口部６１ｃのよこ方向の長さｇ1及びたて方向の長さｇ2と、第２網状体６２の開口部６２ｃのよこ方向の長さｇ3及びたて方向の長さｇ4をそれぞれ３～７ｍｍの範囲内に限定したのは、３ｍｍ未満では粘着剤層１４の発泡性基材１３に対する粘着力が低下してしまい、７ｍｍを超えるとネット６０を積層しても発泡性基材１３の寸法安定性が向上しないからである。また、第１網状体６２のたて繊維６１ａ及びよこ繊維６１ｂの厚さと、第２網状体６２のたて繊維６２ａ及びよこ繊維６２ｂの厚さをそれぞれ２～１００μｍの範囲内に限定したのは、２μｍ未満ではネット１２が薄すぎるため製造工程において皺が入り易くなり、１００μｍを超えるとネット１２が粘着剤層１４よりも厚くなり、発泡性基材１３と粘着剤層１４との密着性が悪くなるからである。 When the length in the width direction and the length in the vertical direction of the opening 61c of the first net 61 of the net 60 are respectively g 1 (mm) and g 2 (mm), g 1 and g 2 are 3 to It is preferably set within a range of 7 mm. Further, when the length in the width direction and the length in the vertical direction of the opening 62c of the second mesh body 62 of the net 60 are g 3 (mm) and g 4 (mm), g 3 and g 4 are It is preferably set within a range of 3 to 7 mm. Further, the thickness of the warp fibers 61a and the weft fibers 61b of the first mesh body 61 and the thickness of the warp fibers 62a and the weft fibers 62b of the second mesh body 62 are set in the range of 2 to 100 μm, respectively. It is preferable that the thickness is set within a range of 20 to 80 μm. Here, the length g 1 in the width direction and the length g 2 in the width direction of the opening 61 c of the first mesh body 61, and the length g 3 in the width direction of the opening 62 c of the second mesh body 62 are determined. The direction length g 4 is limited to the range of 3 to 7 mm. If the length is less than 3 mm, the adhesive strength of the pressure-sensitive adhesive layer 14 to the foamable substrate 13 is reduced. This is because the dimensional stability of the foamable base material 13 does not improve even if the layers are laminated. The thickness of the warp fibers 61a and the weft fibers 61b of the first mesh 62 and the thickness of the warp fibers 62a and the weft fibers 62b of the second mesh 62 are limited to the range of 2 to 100 μm, respectively. If it is less than 2 μm, the net 12 is too thin, so that wrinkles are likely to occur in the manufacturing process. If it exceeds 100 μm, the net 12 becomes thicker than the pressure-sensitive adhesive layer 14 and the adhesion between the foamable base material 13 and the pressure-sensitive adhesive layer 14 is improved. Because it gets worse.
　このように製造された粘着シート５０では、可撓性のあるネット６０の第１網状体６１のたて繊維６１ａの扁平度ｂ1／ａ1及びよこ繊維６１ｂの扁平度ｂ2／ａ2が同一でありかつ１０～６０の範囲内と比較的大きいので、この粘着シート５０を一方向に曲率半径の小さい曲面を有する被着面に、第１網状体６１のたて繊維６１ａがこの曲面に添って湾曲するように貼付したり、或いは第１網状体６１のよこ繊維６１ｂがこの曲面に添って湾曲するように貼付しても、粘着シート５０が被着面から剥がれ難く、粘着シート５０の被着面への添い性が良好である。 In the pressure-sensitive adhesive sheet 50 thus manufactured, the flatness b 1 / a 1 of the warp fibers 61 a of the first net 61 of the flexible net 60 and the flatness b 2 / a 2 of the weft fibers 61 b are the same. Since it is the same and is relatively large in the range of 10 to 60, this adhesive sheet 50 is placed on the adherend surface having a curved surface with a small curvature radius in one direction, and the warp fibers 61a of the first mesh 61 are placed on this curved surface. Even if the adhesive sheet 50 is attached so as to be curved or the weft fiber 61b of the first mesh body 61 is attached so as to bend along the curved surface, the adhesive sheet 50 is hardly peeled off from the adherend surface. Good adherence to the adherend surface.
　一方、可撓性のあるネット６０の第２網状体６２のたて繊維６２ａの扁平度ｂ3／ａ3及びよこ繊維６２ｂの扁平度ｂ4／ａ4が同一でありかつ６０以下としたので、第２網状体６２のたて繊維６２ａの扁平度ｂ3／ａ3及びよこ繊維６２ｂの扁平度ｂ4／ａ4は、第１網状体６１のたて繊維６１ａの扁平度ｂ1／ａ1及びよこ繊維６１ｂの扁平度ｂ2／ａ2より小さい１０未満である場合を含む。第２網状体６２のたて繊維６２ａの扁平度ｂ3／ａ3及びよこ繊維６２ｂの扁平度ｂ4／ａ4が１０未満であっても、粘着シート５０を一方向に曲率半径の小さい曲面を有する被着面に、第１網状体６１のたて繊維６１ａ又はよこ繊維６１ｂがこの曲面に添って湾曲するように貼付すると、第２網状体６２が粘着シート５０の被着面への添い性に影響せず、粘着シート５０の被着面への添い性が良好に保たれる。また、網状体６１，６２を二重にすることで、発泡性基材１３の伸張性が更に制御されるので、第１の実施の形態の粘着シートよりも寸法安定性に優れる。 On the other hand, since the flatness b 3 / a 3 of the warp fibers 62a of the second net 62 of the flexible net 60 and the flatness b 4 / a 4 of the weft fibers 62b are the same and 60 or less. The flatness b 3 / a 3 of the warp fibers 62 a of the second mesh 62 and the flatness b 4 / a 4 of the weft fibers 62 b are determined by the flatness b 1 / a of the warp fibers 61 a of the first mesh 61. 1 and the flatness of the weft fiber 61b is less than 10 less than b 2 / a 2 . Even if the flatness b 3 / a 3 of the warp fibers 62a of the second mesh 62 and the flatness b 4 / a 4 of the weft fibers 62b are less than 10, the adhesive sheet 50 is curved with a small radius of curvature in one direction. When the warp fibers 61a or the weft fibers 61b of the first mesh 61 are attached to the adherend surface so as to bend along the curved surface, the second mesh 62 is attached to the adherend surface of the adhesive sheet 50. The adhesion to the adherend surface of the pressure-sensitive adhesive sheet 50 is kept good without affecting the properties. Moreover, since the extensibility of the foamable base material 13 is further controlled by making the nets 61 and 62 double, the dimensional stability is superior to the pressure-sensitive adhesive sheet of the first embodiment.
　なお、上記第２の実施の形態では、第２網状体を第１網状体に対して平行移動させることにより、第１網状体のたて繊維及びよこ繊維と第２網状体のたて繊維及びよこ繊維とが同一線上に重ならないように構成したが、図９に示すように、ネット８０の第２網状体８２を第１網状体８１に対して回転させることにより、第１網状体８１のたて繊維８１ａ及びよこ繊維８１ｂと第２網状体８２のたて繊維８２ａ及びよこ繊維８２ｂとが同一線上に重ならないように構成してもよい。ここで、図９に示すように、第２網状体８２を第１網状体８１に対して回転させても、粘着シートの添い角度や、ピーリング試験における粘着シートの粘着力は、殆ど変化しない。図９中の符号８１ｃは第１網状体８１の開口部であり、符号８２ｃは第２網状体８２の開口部である。 In the second embodiment, the second mesh body is translated with respect to the first mesh body, whereby the first mesh warp fibers and the weft fibers and the second mesh body warp fibers and The weft fibers are configured so as not to overlap the same line. However, as shown in FIG. 9, by rotating the second mesh 82 of the net 80 relative to the first mesh 81, You may comprise so that the warp fiber 81a and the weft fiber 81b and the warp fiber 82a and the weft fiber 82b of the 2nd net-like body 82 may not overlap on the same line. Here, as shown in FIG. 9, even if the second mesh 82 is rotated with respect to the first mesh 81, the attachment angle of the adhesive sheet and the adhesive strength of the adhesive sheet in the peeling test are hardly changed. In FIG. 9, reference numeral 81 c is an opening portion of the first mesh body 81, and reference numeral 82 c is an opening portion of the second mesh body 82.
　次に本発明の実施例を比較例とともに詳しく説明する。 Next, examples of the present invention will be described in detail together with comparative examples.
　＜実施例１＞
　図１～図３及び図５に示すように、先ず剥離フィルム１１の一方の面全体に粘着剤２１（光洋産業社製のエマルジョン型アクリル系粘着剤：ＫＲ１６３Ｈ）を乾燥後の厚さが８０μｍとなるように塗布した。次いで剥離フィルム１１の一方の面にネット１２を積層した。このネット１２は、ポリエチレン（熱可塑性樹脂）製のたて繊維１２ｃ及びよこ繊維１２ｄが格子状に配列した一重の網状体１２ｂからなり、たて繊維１２ｃ及びよこ繊維１２ｄの横断面が同形同大であり、たて繊維１２ｃ及びよこ繊維１２ｄの扁平率が同一であった。具体的には、網状体１２ｂのたて繊維１２ｃの横断面における厚さＡ1及び幅Ｂ1はそれぞれ３０μｍ及び９００μｍであり、網状体１２ｂのたて繊維１２ｃの扁平度Ｂ1／Ａ1は３０であった。また網状体１２ｂのよこ繊維１２ｄの横断面における厚さＡ2及び幅Ｂ2はそれぞれ３０μｍ及び９００μｍであり、網状体１２ｂのよこ繊維１２ｄの扁平度Ｂ2／Ａ2は３０であった。更に網状体１２ｂの開口部１２ｅは、横の長さＧ1及び縦の長さＧ2がそれぞれ５ｍｍである正方形状であった。上記剥離フィルム１１のネット１２への積層により、粘着剤層１４が剥離フィルム１１に剥離可能に接着されるとともに、ネット１２の一方の面が粘着剤層１４に接着された。この状態でネット１２の他方の面に発泡性基材１３（イノアックコーポレーション社製のポリウレタンフォーム：ＵＥＩ－３、厚さ５ｍｍ）を積層した（図１（ａ））。次に積層された剥離フィルム１１、粘着剤層１４、ネット１２及び発泡性基材１３をロール２３，２３にて圧締した。これにより粘着剤層１４がネット１２の網目１２ａに進入して充填され、粘着剤層１４が発泡性基材１３に圧着された粘着シート１０を得た。この粘着シート１０を実施例１とした。なお、上記粘着シート１０内のネット１２における網状体１２ｂの開口部１２ｅのよこ方向の長さ及びたて方向の長さはそれぞれ５ｍｍの正方形状であった。 <Example 1>
As shown in FIG. 1 to FIG. 3 and FIG. 5, first, an adhesive 21 (emulsion type acrylic adhesive manufactured by Koyo Sangyo Co., Ltd .: KR163H) is dried on the entire surface of the release film 11 to a thickness of 80 μm. It applied so that it might become. Next, a net 12 was laminated on one surface of the release film 11. The net 12 is composed of a single net 12b in which warp fibers 12c and weft fibers 12d made of polyethylene (thermoplastic resin) are arranged in a lattice pattern, and the cross-sections of the warp fibers 12c and the weft fibers 12d have the same shape. The flatness of the warp fibers 12c and the weft fibers 12d was the same. Specifically, the thickness A 1 and the width B 1 in the cross section of the warp fibers 12c of the mesh body 12b are 30 μm and 900 μm, respectively, and the flatness B 1 / A 1 of the warp fibers 12c of the mesh body 12b is 30. Further, the thickness A 2 and the width B 2 in the cross section of the weft fibers 12d of the mesh body 12b were 30 μm and 900 μm, respectively, and the flatness B 2 / A 2 of the weft fibers 12d of the mesh body 12b was 30. Furthermore, the opening 12e of the net-like body 12b has a square shape in which the horizontal length G 1 and the vertical length G 2 are 5 mm each. By the lamination of the release film 11 to the net 12, the pressure-sensitive adhesive layer 14 was detachably bonded to the release film 11, and one surface of the net 12 was bonded to the pressure-sensitive adhesive layer 14. In this state, a foamable base material 13 (polyurethane foam manufactured by Inoac Corporation: UEI-3, thickness 5 mm) was laminated on the other surface of the net 12 (FIG. 1A). Next, the laminated release film 11, pressure-sensitive adhesive layer 14, net 12, and foamable base material 13 were pressed with rolls 23 and 23. As a result, the pressure-sensitive adhesive layer 14 entered the mesh 12 a of the net 12 and was filled, and the pressure-sensitive adhesive sheet 10 was obtained by pressure-bonding the pressure-sensitive adhesive layer 14 to the foamable substrate 13. This pressure-sensitive adhesive sheet 10 was taken as Example 1. In addition, the length in the width direction and the length in the vertical direction of the opening 12e of the mesh body 12b in the net 12 in the adhesive sheet 10 were each 5 mm square.
　＜実施例２～５、比較例１及び比較例２＞
　実施例２～５、比較例１及び比較例２の粘着シートでは、ネットを構成する網状体を表１に示すようにそれぞれ形成した。なお、表１に示したネットを構成する網状体の形状以外は、実施例１と同様にして、粘着シートを作製した。 <Examples 2 to 5, Comparative Example 1 and Comparative Example 2>
In the pressure-sensitive adhesive sheets of Examples 2 to 5, Comparative Example 1 and Comparative Example 2, the nets constituting the net were formed as shown in Table 1, respectively. In addition, the adhesive sheet was produced like Example 1 except the shape of the net-like body which comprises the net | network shown in Table 1.
　＜比較試験１及び評価＞
　実施例１～５、比較例１及び比較例２の粘着シートについて、添い角度試験及び１８０度ピーリング試験をそれぞれ実施した。粘着シートの添い角度試験は次のように行った。先ず粘着シートを、幅及び長さがそれぞれ５０ｍｍ及び３００ｍｍである長方形状に切り出した。この際、粘着シートのネットのたて繊維が長さ３００ｍｍの方向になるように切り出した。次に粘着シート１０を、図５に示すような直径１００ｍｍの円柱体及び２５ｍｍの円柱体の外周面に、発泡性基材１３面が円柱体１６に接し、ネット１２の網状体のたて繊維が円柱体１６の円周方向に一致しかつネット１２のよこ繊維が円柱体１６の稜線方向に一致するように半周分だけ巻き付けた。この際、予め円柱体１６の外周面に貼っておいた両面粘着テープ１７により、粘着シート１０の発泡性基材１３を円柱体１６の外周面にその半周分だけ密着させた。更に粘着シート１０の発泡性基材１３面を円柱体１６に密着させた状態で、粘着シート１０の剥離フィルムを剥がし、１分間放置した後に、ネット１２が発泡性基材１３から剥がれずに、発泡性基材１３に接触する部分の角度θ1を測定した。 <Comparative test 1 and evaluation>
With respect to the pressure-sensitive adhesive sheets of Examples 1 to 5, Comparative Example 1 and Comparative Example 2, an attachment angle test and a 180 degree peeling test were performed, respectively. The adhesion angle test of the adhesive sheet was performed as follows. First, the pressure-sensitive adhesive sheet was cut into a rectangular shape having a width and a length of 50 mm and 300 mm, respectively. Under the present circumstances, it cut out so that the warp fiber of the net | network of an adhesive sheet might become the direction of length 300mm. Next, the pressure-sensitive adhesive sheet 10 is placed on the outer peripheral surface of a cylinder having a diameter of 100 mm and a cylinder having a diameter of 25 mm as shown in FIG. Is wound around a half of the circumference so that the weaves coincide with the circumferential direction of the cylindrical body 16 and the weft fibers of the net 12 coincide with the ridge line direction of the cylindrical body 16. At this time, the foamable base material 13 of the pressure-sensitive adhesive sheet 10 was brought into close contact with the outer peripheral surface of the cylindrical body 16 by the half circumference with the double-sided adhesive tape 17 previously applied to the outer peripheral surface of the cylindrical body 16. Furthermore, in a state where the surface of the foamable base material 13 of the pressure-sensitive adhesive sheet 10 is in close contact with the cylindrical body 16, the release film of the pressure-sensitive adhesive sheet 10 is peeled off, and after leaving for 1 minute, the net 12 is not peeled off from the foamable base material 13. The angle θ 1 of the portion in contact with the foamable substrate 13 was measured.
　一方、１８０度ピーリング試験はＪＩＳ Ｚ ０２３７に準拠して次のように行った。先ず粘着シートから幅及び長さがそれぞれ２５ｍｍ及び１５０ｍｍである試験片を切り出した。次に剥離フィルムを除去した試験片をＳＵＳ３０４の被着体に貼付け、２ｋｇのゴムローラを１往復させて圧着した。更に室温で１時間養生した後に、３００ｍｍ／分のスピードで粘着シートを被着体から引き剥がし、この引き剥がしたときの粘着シートの粘着力を測定した。これらの結果を、ネットの網状体における繊維の厚さ、幅及び扁平度と、開口部の一辺の長さとともに、表１に示す。なお、表１における添い角度θ1の判定基準は、添い角度θ1が１６５度以上１８０度以下の範囲内にあったときを『優』とし、添い角度θ1が１５０度以上１６５度未満の範囲内にあったときを『良』とし、添い角度θ1が１５０度未満の範囲内にあったときを『不適』とした。 On the other hand, the 180 degree peeling test was performed as follows based on JIS Z0237. First, a test piece having a width and a length of 25 mm and 150 mm, respectively, was cut out from the adhesive sheet. Next, the test piece from which the release film was removed was affixed to an adherend of SUS304, and a 2 kg rubber roller was reciprocated once for pressure bonding. Furthermore, after curing at room temperature for 1 hour, the pressure-sensitive adhesive sheet was peeled off from the adherend at a speed of 300 mm / min, and the pressure-sensitive adhesive strength of the pressure-sensitive adhesive sheet when peeled off was measured. These results are shown in Table 1 together with the thickness, width and flatness of the fibers in the net of the net, and the length of one side of the opening. The determination criteria of the angle theta 1 Soi in Table 1, Soi when the angle theta 1 were within the range of 180 degrees 165 degrees and "excellent", Soi angle theta 1 is less than 150 degrees 165 degrees When it was within the range, it was determined as “good”, and when the attachment angle θ 1 was within the range of less than 150 degrees, it was determined as “unsuitable”.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１から明らかなように、ネットの網状体におけるたて繊維の扁平度Ｂ1／Ａ1及びよこ繊維の扁平度Ｂ2／Ａ2がそれぞれ９と小さい比較例１の粘着シートでは、１８０度ピーリング試験における粘着シートの粘着力が１０．５Ｎ／２５ｍｍ幅と良好であったけれども、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１４５度及び１３５度と小さくなり、粘着シートとして不適であった。また、ネットの網状体におけるたて繊維の扁平度Ｂ1／Ａ1及びよこ繊維の扁平度Ｂ2／Ａ2がそれぞれ６５と大きい比較例２の粘着シートでは、網状体の開口部面積の減少により発泡性基材及びネットと、粘着剤層との密着性が悪くなり、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１５０度及び１４５度と小さくなり、１８０度ピーリング試験ではネットが発泡性基材から浮いてしまい、粘着シートとして不適であった。これらに対し、ネットの網状体におけるたて繊維の扁平度Ｂ1／Ａ1及びよこ繊維の扁平度Ｂ2／Ａ2が３～６０と適切な範囲内にある実施例１～５の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１６０～１８０度及び１５０～１８０度と大きくなり、また１８０度ピーリング試験における粘着シートの粘着力も１０．５～１６．３Ｎ／２５ｍｍ幅と大きくなり、粘着シートとして優秀又は良好であった。 As is apparent from Table 1, in the pressure-sensitive adhesive sheet of Comparative Example 1 in which the flatness B 1 / A 1 of the warp fibers and the flatness B 2 / A 2 of the weft fibers in the net of the net are as small as 9 respectively, 180 degrees Although the adhesive strength of the adhesive sheet in the peeling test was 10.5 N / 25 mm width, the attachment angle of the adhesive sheet at a cylindrical body diameter of 100 mm and 25 mm was reduced to 145 degrees and 135 degrees, respectively, which is not suitable as an adhesive sheet. there were. Further, in the pressure-sensitive adhesive sheet of Comparative Example 2 in which the flatness B 1 / A 1 of the warp fibers and the flatness B 2 / A 2 of the weft fibers in the net of the net are 65, respectively, the opening area of the net is reduced. As a result, the adhesion between the foamable substrate and the net and the pressure-sensitive adhesive layer is deteriorated, and the attachment angle of the pressure-sensitive adhesive sheet at a cylindrical body diameter of 100 mm and 25 mm is reduced to 150 degrees and 145 degrees, respectively. It floated from the foamable substrate and was unsuitable as an adhesive sheet. In contrast, the pressure-sensitive adhesive sheets of Examples 1 to 5 in which the flatness B 1 / A 1 of the warp fibers and the flatness B 2 / A 2 of the weft fibers in the net of the net are within the appropriate ranges of 3 to 60 Then, the attachment angle of the pressure-sensitive adhesive sheet with cylinder diameters of 100 mm and 25 mm is increased to 160 to 180 degrees and 150 to 180 degrees, respectively, and the pressure-sensitive adhesive strength of the pressure-sensitive adhesive sheet in the 180-degree peeling test is 10.5 to 16.3 N / 25 mm width The pressure-sensitive adhesive sheet was excellent or good.
　＜実施例６＞
　実施例１のたて繊維及びよこ繊維の横断面形状が同一同大に形成された一重の網状体からなるネットに替えて、たて繊維及びよこ繊維の横断面形状が異なる一重の網状体からなるネットを用いた。このネットでは、網状体のたて繊維の横断面における厚さＡ1及び幅Ｂ1がそれぞれ３０μｍ及び９００μｍであり、網状体のたて繊維の扁平度Ｂ1／Ａ1は３０であった。また網状体のよこ繊維の横断面における厚さＡ2及び幅Ｂ2はそれぞれ３０μｍ及び３０μｍであり、網状体のよこ繊維の扁平度Ｂ2／Ａ2が９であった。更に網状体の開口部は、横の長さＧ1及び縦の長さＧ2がそれぞれ７ｍｍである正方形状であった。上記以外は、実施例１と同様にして、粘着シートを作製した。この粘着シートを実施例６とした。 <Example 6>
Instead of the net consisting of a single net having the same cross-sectional shape of the warp fiber and the weft fiber of Example 1, instead of a single net having different cross-sectional shapes of the warp fiber and the weft fiber. I used the net. In this net, the thickness A 1 and the width B 1 in the cross section of the warp fibers of the mesh body were 30 μm and 900 μm, respectively, and the flatness B 1 / A 1 of the warp fibers of the mesh body was 30. Further, the thickness A 2 and the width B 2 in the cross section of the weft fibers of the net-like body were 30 μm and 30 μm, respectively, and the flatness B 2 / A 2 of the weft fibers of the net-like body was 9. Furthermore, the opening part of the net-like body was a square shape in which the horizontal length G 1 and the vertical length G 2 were 7 mm each. Except for the above, an adhesive sheet was prepared in the same manner as in Example 1. This pressure-sensitive adhesive sheet was referred to as Example 6.
　＜実施例７～１０及び比較例３～５＞
　実施例７～１０及び比較例３～５の粘着シートでは、ネットを構成する網状体を表２に示すようにそれぞれ形成した。なお、表２に示したネットを構成する網状体の形状以外は、実施例６と同様にして、粘着シートを作製した。 <Examples 7 to 10 and Comparative Examples 3 to 5>
In the pressure-sensitive adhesive sheets of Examples 7 to 10 and Comparative Examples 3 to 5, the nets constituting the net were formed as shown in Table 2, respectively. In addition, the adhesive sheet was produced like Example 6 except the shape of the net-like body which comprises the net | network shown in Table 2.
　＜比較試験２及び評価＞
　実施例６～１０及び比較例３～５の粘着シートについて、比較試験１と同様の添い角度試験及び１８０度ピーリング試験をそれぞれ実施した。その結果を、ネットの網状体における繊維の厚さ、幅及び扁平度と、開口部の一辺の長さとともに、表２に示す。なお、表２における添い角度θ1の判定基準は、添い角度θ1が１６５度以上１８０度以下の範囲内にあったときを『優』とし、添い角度θ1が１５０度以上１６５度未満の範囲内にあったときを『良』とし、添い角度θ1が１５０度未満の範囲内にあったときを『不適』とした。 <Comparative test 2 and evaluation>
For the pressure-sensitive adhesive sheets of Examples 6 to 10 and Comparative Examples 3 to 5, the same additive angle test and 180-degree peeling test as in Comparative Test 1 were performed, respectively. The results are shown in Table 2 together with the thickness, width and flatness of the fibers in the net of the net, and the length of one side of the opening. The determination criteria of the angle theta 1 Soi in Table 2 Soy when the angle theta 1 were within the range of 180 degrees 165 degrees and "excellent", Soi angle theta 1 is less than 150 degrees 165 degrees When it was within the range, it was determined as “good”, and when the attachment angle θ 1 was within the range of less than 150 degrees, it was determined as “unsuitable”.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　表２から明らかなように、ネットの網状体におけるたて繊維の扁平度Ｂ1／Ａ1が３０と適切な範囲内にあるけれども、よこ繊維の扁平度Ｂ2／Ａ2が６５と大きい比較例３の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１５５度及び１４０度と小さくなり、１８０度ピーリング試験ではネットが発泡性基材から浮いてしまい、粘着シートとして不適であった。また、ネットの網状体におけるよこ繊維の扁平度Ｂ2／Ａ2が３０と適切な範囲内にあるけれども、たて繊維の扁平度Ｂ1／Ａ1が６５と大きい比較例４の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１５０度及び１４５度と小さくなり、１８０度ピーリング試験ではネットが発泡性基材から浮いてしまい、粘着シートとして不適であった。更に、ネットの網状体におけるよこ繊維の扁平度Ｂ2／Ａ2が３０と適切な範囲内にあるけれども、たて繊維の扁平度Ｂ1／Ａ1が９と小さい比較例５の粘着シートでは、１８０度ピーリング試験における粘着シートの粘着力は１２．５Ｎ／ｍｍ幅と良好であったけれども、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１４０度及び１３０度と小さくなり、粘着シートとして不適であった。これらに対し、ネットの網状体におけるたて繊維の扁平度Ｂ1／Ａ1が１０～６０と適切な範囲内にあり、よこ繊維の扁平度Ｂ2／Ａ2が９と小さい実施例６～１０の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１６０～１８０度及び１５０～１７５度と大きくなり、１８０度ピーリング試験における粘着シートの粘着力も１０．５～１６．３Ｎ／２５ｍｍ幅と大きくなり、粘着シートとして優秀又は良好であった。 As is apparent from Table 2, the flatness B 1 / A 1 of the warp fibers in the net of the net is within an appropriate range of 30, but the flatness B 2 / A 2 of the weft fibers is a large comparison of 65 In the pressure-sensitive adhesive sheet of Example 3, the adhering angle of the pressure-sensitive adhesive sheet at a cylindrical body diameter of 100 mm and 25 mm is reduced to 155 degrees and 140 degrees, respectively, and the net floats from the foamable substrate in the 180-degree peeling test, which is not suitable as a pressure-sensitive adhesive sheet. Met. In the pressure-sensitive adhesive sheet of Comparative Example 4, the flatness B 2 / A 2 of the weft fibers in the net of the net is within an appropriate range of 30, but the flatness B 1 / A 1 of the vertical fibers is as large as 65. The addition angle of the pressure-sensitive adhesive sheet at a cylindrical body diameter of 100 mm and 25 mm was as small as 150 degrees and 145 degrees, respectively. In the 180-degree peeling test, the net floated from the foamable substrate, which was not suitable as a pressure-sensitive adhesive sheet. Further, in the pressure-sensitive adhesive sheet of Comparative Example 5, the flatness B 2 / A 2 of the weft fiber in the net of the net is in an appropriate range of 30, but the flatness B 1 / A 1 of the vertical fiber is as small as 9. Although the adhesive strength of the adhesive sheet in the 180 degree peeling test was as good as 12.5 N / mm width, the addition angle of the adhesive sheet at a cylinder diameter of 100 mm and 25 mm was reduced to 140 degrees and 130 degrees, respectively. As unsuitable. On the other hand, the flatness B 1 / A 1 of the warp fibers in the net of the net is in an appropriate range of 10 to 60, and the flatness B 2 / A 2 of the weft fibers is as small as 9, Examples 6 to In the pressure-sensitive adhesive sheet No. 10, the attachment angle of the pressure-sensitive adhesive sheet with a cylindrical body diameter of 100 mm and 25 mm is increased to 160 to 180 degrees and 150 to 175 degrees, respectively, and the adhesive strength of the pressure-sensitive adhesive sheet in the 180-degree peeling test is also 10.5 to 16.3 N. / 25 mm wide and was excellent or good as an adhesive sheet.
　＜実施例１１＞
　実施例１のたて繊維及びよこ繊維の横断面形状が同一同大に形成された一重の網状体からなるネットに替えて、二重の第１及び第２網状体からなるネットを用いた。具体的には、図６～８に示すように、ネット６０を構成する第１網状体６１のたて繊維６１ａの横断面における厚さ及び幅をそれぞれａ1及びｂ1とし、第１網状体６１のよこ繊維６１ｂの横断面における厚さ及び幅をそれぞれａ2及びｂ2とするとき、第１網状体６１のたて繊維６１ａの扁平度ｂ1／ａ1及びよこ繊維６１ｂの扁平度ｂ2／ａ2は、同一であり、かつ３０であった。また、ネット６０を構成する第２網状体６２のたて繊維６２ａの横断面における厚さ及び幅をそれぞれａ3及びｂ3とし、第２網状体６２のよこ繊維６２ｂの横断面における厚さ及び幅をそれぞれａ4及びｂ4とするとき、第２網状体６２のたて繊維６２ａの扁平度ｂ3／ａ3及びよこ繊維６２ｂの扁平度ｂ4／ａ4は、同一であり、かつ３０であった。更に、第１網状体６１の開口部６１ｃは、よこ方向の長さｇ1及びたて方向の長さｇ2がそれぞれ５ｍｍである正方形状であり、第２網状体６２の開口部６２ｃも、よこ方向の長さｇ3及びたて方向の長さｇ4がそれぞれ５ｍｍである正方形状であった。上記以外は、実施例１と同様にして、粘着シートを作製した。この粘着シートを実施例１１とした。 <Example 11>
Instead of the net made of a single net having the same cross-sectional shape of the warp fiber and the weft fiber of Example 1, a net made of a double first and second net was used. Specifically, as shown in FIGS. 6 to 8, the thickness and width in the cross section of the warp fiber 61a of the first mesh 61 constituting the net 60 are a 1 and b 1 , respectively. When the thickness and width in the cross section of the 61 weft fiber 61b are a 2 and b 2 respectively, the flatness b 1 / a 1 of the warp fiber 61a of the first mesh 61 and the flatness b of the weft fiber 61b 2 / a 2 was the same and was 30. Further, the thickness and width in the cross section of the warp fiber 62a of the second mesh 62 constituting the net 60 are a 3 and b 3 respectively, and the thickness and width in the cross section of the weft fiber 62b of the second mesh 62 are When the widths are a 4 and b 4 respectively, the flatness b 3 / a 3 of the warp fibers 62a of the second mesh 62 and the flatness b 4 / a 4 of the weft fibers 62b are the same and 30 Met. Furthermore, the opening 61c of the first mesh 61 has a square shape in which the length g 1 in the transverse direction and the length g 2 in the vertical direction are each 5 mm, and the opening 62c of the second mesh 62 is also The length g 3 in the transverse direction and the length g 4 in the vertical direction were each 5 mm. Except for the above, an adhesive sheet was prepared in the same manner as in Example 1. This pressure-sensitive adhesive sheet was referred to as Example 11.
　＜実施例１２～１６及び比較例６～９＞
　実施例１２～１６及び比較例６～９の粘着シートでは、ネットを構成する第１及び第２網状体を表３に示すようにそれぞれ形成した。なお、表３に示したネットを構成する第１及び第２網状体の形状以外は、実施例１１と同様にして、粘着シートを作製した。 <Examples 12 to 16 and Comparative Examples 6 to 9>
In the pressure-sensitive adhesive sheets of Examples 12 to 16 and Comparative Examples 6 to 9, the first and second nets constituting the net were formed as shown in Table 3, respectively. In addition, the adhesive sheet was produced like Example 11 except the shape of the 1st and 2nd mesh body which comprises the net | network shown in Table 3.
　＜比較試験３及び評価＞
　実施例１１～１６及び比較例６～９の粘着シートについて、比較試験１と同様の添い角度試験及び１８０度ピーリング試験をそれぞれ実施した。添い角度試験においては、粘着シートを、直径１００ｍｍの円柱体及び２５ｍｍの円柱体の外周面に、発泡性基材面が円柱体に接し、ネットの第１網状体のたて繊維が円柱体の円周方向に一致しかつネットの第１網状体のよこ繊維が円柱体の稜線方向に一致するように半周分だけ巻き付けた。その結果を、ネットの第１及び第２網状体における繊維の厚さ、幅及び扁平度と、開口部の一辺の長さとともに、表３に示す。なお、表３における添い角度θ1の判定基準は、添い角度θ1が１６５度以上１８０度以下の範囲内にあったときを『優』とし、添い角度θ1が１５０度以上１６５度未満の範囲内にあったときを『良』とし、添い角度θ1が１５０度未満の範囲内にあったときを『不適』とした。 <Comparative test 3 and evaluation>
For the pressure-sensitive adhesive sheets of Examples 11 to 16 and Comparative Examples 6 to 9, the same additive angle test and 180-degree peeling test as in Comparative Test 1 were performed, respectively. In the incident angle test, the pressure-sensitive adhesive sheet is made of a cylindrical body having a diameter of 100 mm and a cylindrical body having a diameter of 25 mm, the foamable substrate surface is in contact with the cylindrical body, and the vertical fiber of the first net-like body of the net is the cylindrical body. The half fiber was wound so that the weft fibers of the first net-like body of the net coincided with the circumferential direction and coincided with the ridge line direction of the cylindrical body. The results are shown in Table 3 together with the thickness, width and flatness of the fibers in the first and second nets of the net and the length of one side of the opening. The determination criteria of the angle theta 1 Soi in Table 3, Soi when the angle theta 1 were within the range of 180 degrees 165 degrees and "excellent", Soi angle theta 1 is less than 150 degrees 165 degrees When it was within the range, it was determined as “good”, and when the attachment angle θ 1 was within the range of less than 150 degrees, it was determined as “unsuitable”.
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　表３から明らかなように、ネットの第１網状体におけるたて繊維の扁平度ｂ1／ａ1及びよこ繊維の扁平度ｂ2／ａ2がそれぞれ３０と適切な範囲内であるけれども、第２網状体におけるたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4がそれぞれ６５と大きい比較例６の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１５０度及び１３５度と小さくなり、また１８０度ピーリング試験ではネットが発泡性基材から浮いてしまい、粘着シートとして不適であった。また、ネットの第１網状体におけるたて繊維の扁平度ｂ1／ａ1及びよこ繊維の扁平度ｂ2／ａ2がそれぞれ９と小さく、第２網状体におけるたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4がそれぞれ９と小さい比較例７の粘着シートでは、１８０度ピーリング試験における粘着シートの粘着力が１０．０Ｎ／２５ｍｍ幅と良好であったけれども、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１４３度及び１３０度と小さく、粘着シートとして不適であった。 As is apparent from Table 3, the warp fiber flatness b 1 / a 1 and the weft fiber flatness b 2 / a 2 in the first net of the net are within the appropriate ranges of 30, respectively. 2 In the pressure-sensitive adhesive sheet of Comparative Example 6 in which the flatness b 3 / a 3 of the warp fibers in the reticulate body and the flatness b 4 / a 4 of the weft fibers are 65, respectively, the pressure-sensitive adhesive sheet with a cylindrical body diameter of 100 mm and 25 mm The angles were reduced to 150 degrees and 135 degrees, respectively, and in the 180 degree peeling test, the net floated from the foamable substrate, which was not suitable as an adhesive sheet. Further, the flatness b 1 / a 1 of the warp fibers in the first mesh body of the net and the flatness b 2 / a 2 of the weft fibers are each small as 9, and the flatness b 3 of the warp fibers in the second mesh body. In the pressure-sensitive adhesive sheet of Comparative Example 7 in which the flatness b 4 / a 4 of each of / a 3 and the weft fiber is as small as 9, the pressure-sensitive adhesive strength of the pressure-sensitive adhesive sheet in the 180-degree peeling test was as good as 10.0 N / 25 mm width. The attachment angle of the pressure-sensitive adhesive sheet at a cylindrical body diameter of 100 mm and 25 mm was as small as 143 degrees and 130 degrees, respectively, and was not suitable as a pressure-sensitive adhesive sheet.
　また、ネットの第１網状体におけるたて繊維の扁平度ｂ1／ａ1及びよこ繊維の扁平度ｂ2／ａ2がそれぞれ９と小さく、第２網状体におけるたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4がそれぞれ６５と大きい比較例８の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１４５度及び１３５度と小さくなり、また１８０度ピーリング試験ではネットが発泡性基材から浮いてしまい、粘着シートとして不適であった。更に、ネットの第１網状体におけるたて繊維の扁平度ｂ1／ａ1及びよこ繊維の扁平度ｂ2／ａ2がそれぞれ６５と大きく、第２網状体におけるたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4もそれぞれ６５と大きい比較例９の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度がそれぞれ１４５度及び１３５度と小さくなり、また１８０度ピーリング試験ではネットが発泡性基材から浮いてしまい、粘着シートとして不適であった。 Further, the flatness b 1 / a 1 of the warp fibers in the first mesh body of the net and the flatness b 2 / a 2 of the weft fibers are each small as 9, and the flatness b 3 of the warp fibers in the second mesh body. In the pressure-sensitive adhesive sheet of Comparative Example 8 in which the flatness b 4 / a 4 of each of / a 3 and the weft fiber is as large as 65, the addition angle of the pressure-sensitive adhesive sheet at a cylindrical body diameter of 100 mm and 25 mm is reduced to 145 degrees and 135 degrees, respectively. In the 180 degree peeling test, the net floated from the foamable base material, which was not suitable as an adhesive sheet. Further, the flatness b 1 / a 1 of the warp fibers in the first mesh body of the net and the flatness b 2 / a 2 of the weft fibers are respectively large as 65, and the flatness b 3 of the warp fibers in the second mesh body. In the pressure-sensitive adhesive sheet of Comparative Example 9 in which the flatness b 4 / a 4 of each of / a 3 and the weft fiber is also 65, respectively, the attachment angle of the pressure-sensitive adhesive sheet at a cylindrical body diameter of 100 mm and 25 mm is reduced to 145 degrees and 135 degrees, respectively. In the 180 degree peeling test, the net floated from the foamable base material, which was not suitable as an adhesive sheet.
　これらに対し、ネットの第１網状体におけるたて繊維の扁平度ｂ1／ａ1及びよこ繊維の扁平度ｂ2／ａ2が１０～６０と適切な範囲内にあり、第２網状体におけるたて繊維の扁平度ｂ3／ａ3及びよこ繊維の扁平度ｂ4／ａ4が９と小さいか或いは１０～６０と適切な範囲内にある実施例１１～１６の粘着シートでは、円柱体直径１００ｍｍ及び２５ｍｍにおける粘着シートの添い角度が１５５～１８０度及び１５０～１７５度と大きくなり、１８０度ピーリング試験における粘着シートの粘着力が１０．２～１５．６Ｎ／２５ｍｍ幅と大きくなり、粘着シートとして優秀又は良好であった。 On the other hand, the flatness b 1 / a 1 of the warp fibers in the first net of the net and the flatness b 2 / a 2 of the weft fibers are within an appropriate range of 10 to 60, and in the second mesh In the pressure-sensitive adhesive sheets of Examples 11 to 16 in which the flatness b 3 / a 3 of the warp fibers and the flatness b 4 / a 4 of the weft fibers are as small as 9 or within an appropriate range of 10 to 60, Adhesion angles of adhesive sheets at diameters of 100 mm and 25 mm are increased to 155 to 180 degrees and 150 to 175 degrees, and the adhesive force of the adhesive sheet in the 180 degree peeling test is increased to 10.2 to 15.6 N / 25 mm width, which is adhesive. It was excellent or good as a sheet.
　＜実施例１７＞
　実施例１の発泡性基材（圧縮硬さ：８８Ｎ／３１４ｃｍ2、厚さ：５ｍｍ）に替えて、圧縮硬さが５Ｎ／３１４ｃｍ2である発泡性基材（厚さ：５ｍｍ）を用いたこと以外は、実施例１と同様にして粘着シートを作製した。この粘着シートを実施例１７とした。 <Example 17>
Instead of the foamable substrate of Example 1 (compression hardness: 88 N / 314 cm 2 , thickness: 5 mm), a foamable substrate (thickness: 5 mm) having a compression hardness of 5 N / 314 cm 2 was used. A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that. This adhesive sheet was referred to as Example 17.
　＜実施例１８＞
　実施例１の発泡性基材（圧縮硬さ：８８Ｎ／３１４ｃｍ2、厚さ：５ｍｍ）に替えて、圧縮硬さが２００Ｎ／３１４ｃｍ2である発泡性基材（厚さ：５ｍｍ）を用いたこと以外は、実施例１と同様にして粘着シートを作製した。この粘着シートを実施例１８とした。 <Example 18>
Instead of the foamable substrate of Example 1 (compression hardness: 88 N / 314 cm 2 , thickness: 5 mm), a foamable substrate (thickness: 5 mm) having a compression hardness of 200 N / 314 cm 2 was used. A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that. This pressure-sensitive adhesive sheet was designated as Example 18.
　＜実施例１９＞
　実施例１１の発泡性基材（圧縮硬さ：８８Ｎ／３１４ｃｍ2、厚さ：５ｍｍ）に替えて、圧縮硬さが５Ｎ／３１４ｃｍ2である発泡性基材（厚さ：５ｍｍ）を用いたこと以外は、実施例１と同様にして粘着シートを作製した。この粘着シートを実施例１９とした。 <Example 19>
Instead of the foamable substrate of Example 11 (compression hardness: 88 N / 314 cm 2 , thickness: 5 mm), a foamable substrate (thickness: 5 mm) having a compression hardness of 5 N / 314 cm 2 was used. A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that. This pressure-sensitive adhesive sheet was referred to as Example 19.
　＜実施例２０＞
　実施例１１の発泡性基材（圧縮硬さ：８８Ｎ／３１４ｃｍ2、厚さ：５ｍｍ）に替えて、圧縮硬さが２００Ｎ／３１４ｃｍ2である発泡性基材（厚さ：５ｍｍ）を用いたこと以外は、実施例１と同様にして粘着シートを作製した。この粘着シートを実施例２０とした。 <Example 20>
Instead of the foamable substrate of Example 11 (compression hardness: 88 N / 314 cm 2 , thickness: 5 mm), a foamable substrate (thickness: 5 mm) having a compression hardness of 200 N / 314 cm 2 was used. A pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that. This pressure-sensitive adhesive sheet was referred to as Example 20.
　＜比較例１０及び比較例１１＞
　比較例１０及び比較例１１の粘着シートでは、発泡性基材（厚さ：５ｍｍ）として表４に示す圧縮硬さのものをそれぞれ用いた。なお、表４に示した発泡性基材以外は、実施例１７と同様にして、粘着シートを作製した。 <Comparative Example 10 and Comparative Example 11>
In the pressure-sensitive adhesive sheets of Comparative Example 10 and Comparative Example 11, those having the compression hardness shown in Table 4 were used as the foamable base material (thickness: 5 mm). In addition, the adhesive sheet was produced like Example 17 except the foamable base material shown in Table 4.
　＜比較試験４及び評価＞
　実施例１７～２０、比較例１０及び比較例１１の粘着シートについて、ネットと発泡性基材との密着性を測定した。具体的には、ＪＩＳ　Ｋ　６４００に規定されている軟質発泡体材料の測定方法に準拠して発泡性基材の圧縮硬さ及び伸び率の測定を行った。また伸び率測定後の粘着シートにおける発泡性基材とネットの密着性を判定した。そして、伸び率の測定後でも発泡性基材とネットが密着しているものを『可』と判定し、発泡性基材からネットが剥がれたものを『不可』と判定した。その結果を、発泡性基材の厚さと圧縮硬さとともに表４に示す。 <Comparative test 4 and evaluation>
For the adhesive sheets of Examples 17 to 20, Comparative Example 10 and Comparative Example 11, the adhesion between the net and the foamable substrate was measured. Specifically, the compression hardness and elongation rate of the foamable substrate were measured in accordance with the measurement method for the soft foam material defined in JIS K 6400. Moreover, the adhesiveness of the foamable base material and net | network in the adhesive sheet after elongation rate measurement was determined. Then, even after the measurement of the elongation rate, the case where the foamable base material and the net were in close contact with each other was judged as “possible”, and the case where the net peeled off from the foamable base material was judged as “impossible”. The results are shown in Table 4 together with the thickness and compression hardness of the foamable substrate.
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
　表４から明らかなように、発泡性基材の圧縮硬さが１Ｎ／３１４ｃｍ2と小さい比較例１０の粘着シートでは、発泡性基材が柔らか過ぎて粘着剤層が剥離フィルムから剥がせなかったため、粘着シートとしては不適であった。また、発泡性基材の圧縮硬さが２２０Ｎ／３１４ｃｍ2と大きい比較例１１の粘着シートでは、発泡性基材が硬過ぎてネットと発泡性基材との密着性が悪いため、粘着シートとしては不適であった。これらに対し、発泡性基材の圧縮硬さが５Ｎ／３１４ｃｍ2及び２００Ｎ／３１４ｃｍ2とそれぞれ適切でありかつ一重の網状体からなるネットを用いた実施例１７及び１８の粘着シートや、発泡性基材の圧縮硬さが５Ｎ／３１４ｃｍ2及び２００Ｎ／３１４ｃｍ2とそれぞれ適切でありかつ二重の網状体からなるネットを用いた実施例１９及び２０の粘着シートでは、ネットと発泡性基材との密着性が良く、粘着シートとして好ましいことが分かった。 As is clear from Table 4, in the pressure-sensitive adhesive sheet of Comparative Example 10 where the compressive hardness of the foamable substrate was as small as 1 N / 314 cm 2 , the foamable substrate was too soft and the pressure-sensitive adhesive layer could not be peeled off from the release film. It was unsuitable as an adhesive sheet. Further, in the pressure-sensitive adhesive sheet of Comparative Example 11 in which the compressive hardness of the foamable base material is as large as 220 N / 314 cm 2 , the foamable base material is too hard and the adhesion between the net and the foamable base material is poor. Was unsuitable. On the other hand, the pressure-sensitive adhesive sheet of Examples 17 and 18 using a net composed of a single net-like material with a compressive hardness of the foamable substrate of 5 N / 314 cm 2 and 200 N / 314 cm 2 , respectively, In the pressure-sensitive adhesive sheets of Examples 19 and 20 in which the compression hardness of the base material is appropriate as 5 N / 314 cm 2 and 200 N / 314 cm 2 , respectively, and a net made of a double network is used, It was found that the adhesive properties of the adhesive sheet were good and preferable as an adhesive sheet.
　本発明の粘着シートは、車両の防音シート、水密又は気密パッキン、断熱材等に利用できる。 The pressure-sensitive adhesive sheet of the present invention can be used for vehicle soundproofing sheets, watertight or airtight packing, heat insulating materials, and the like.

Claims (5)

  1. 　剥離フィルムと、この剥離フィルムに一方の面が対向するように積層されたネットと、このネットの他方の面に対向するように積層された伸張性及び可撓性のある発泡性基材と、前記剥離フィルム及び前記ネット間に介装されておりかつ前記剥離フィルム及び前記ネットを積層接着する粘着剤層とを備え、前記粘着剤層が前記剥離フィルムの前記ネットへの対向面全体に塗布されかつ前記ネットの網目を塞ぐように構成された粘着シートにおいて、
    　前記ネットが熱可塑性樹脂からなるたて繊維とよこ繊維が格子状に配列した一重の網状体からなり、
    　前記たて繊維の横断面における厚さ及び幅をそれぞれＡ1及びＢ1とし、前記よこ繊維の横断面における厚さ及び幅をそれぞれＡ2及びＢ2とするとき、前記たて繊維の扁平度Ｂ1／Ａ1が１０～６０の範囲内にあり、前記よこ繊維の扁平度Ｂ2／Ａ2が６０以下である
    　ことを特徴とする粘着シート。     A release film, a net laminated to the release film so that one surface thereof is opposed, and a stretchable and flexible foamable base material laminated so as to be opposed to the other surface of the net; A pressure-sensitive adhesive layer interposed between the release film and the net and laminating and bonding the release film and the net, and the pressure-sensitive adhesive layer is applied to the entire surface of the release film facing the net. And in the pressure-sensitive adhesive sheet configured to close the mesh of the net,
    The net is composed of a single net-like body in which warp fibers and weft fibers made of thermoplastic resin are arranged in a lattice pattern,
    When the thickness and width in the cross section of the warp fiber are A 1 and B 1 , respectively, and the thickness and width in the cross section of the weft fiber are A 2 and B 2 , respectively, the flatness of the warp fiber B 1 / A 1 is in the range of 10 to 60, and the flatness B 2 / A 2 of the weft fibers is 60 or less.
  2. 　剥離フィルムと、この剥離フィルムに一方の面が対向するように積層されたネットと、このネットの他方の面に対向するように積層された伸張性及び可撓性のある発泡性基材と、前記剥離フィルム及び前記ネット間に介装されておりかつ前記剥離フィルム及び前記ネットを積層接着する粘着剤層とを備え、前記粘着剤層が前記剥離フィルムの前記ネットへの対向面全体に塗布されかつ前記ネットの網目を塞ぐように構成された粘着シートにおいて、
    　前記ネットが熱可塑性樹脂からなるたて繊維とよこ繊維が格子状に配列した二重の第１及び第２網状体からなり、
    　前記第１網状体のたて繊維及びよこ繊維と前記第２網状体のたて繊維及びよこ繊維とが互いに同一線上に重ならず、
    　前記第１網状体のたて繊維の横断面における厚さ及び幅をそれぞれａ1及びｂ1とし、前記第１網状体のよこ繊維の横断面における厚さ及び幅をそれぞれａ2及びｂ2とし、前記第２網状体のたて繊維の横断面における厚さ及び幅をそれぞれａ3及びｂ3とし、前記第２網状体のよこ繊維の横断面における厚さ及び幅をそれぞれａ4及びｂ4とするとき、前記第１網状体のたて繊維の扁平度ｂ1／ａ1及び前記第１網状体のよこ繊維の扁平度ｂ2／ａ2が同一でありかつ１０～６０の範囲内にあり、前記第２網状体のたて繊維の扁平度ｂ3／ａ3及び前記第２網状体のよこ繊維の扁平度ｂ4／ａ4が同一でありかつ６０以下である
    　ことを特徴とする粘着シート。     A release film, a net laminated to the release film so that one surface thereof is opposed, and a stretchable and flexible foamable base material laminated so as to be opposed to the other surface of the net; A pressure-sensitive adhesive layer interposed between the release film and the net and laminating and bonding the release film and the net, and the pressure-sensitive adhesive layer is applied to the entire surface of the release film facing the net. And in the pressure-sensitive adhesive sheet configured to close the mesh of the net,
    The net is composed of double first and second nets in which warp fibers and weft fibers made of a thermoplastic resin are arranged in a lattice pattern,
    The warp fibers and weft fibers of the first mesh body and the warp fibers and weft fibers of the second mesh body do not overlap with each other,
    The thickness and width of the cross section of the longitudinal fibers of the first net member and a 1 and b 1, respectively, and the thickness and width of the cross section of the transverse fibers of the first net member, respectively a 2 and b 2 , The thickness and width in the cross section of the warp fibers of the second mesh body are a 3 and b 3 , respectively, and the thickness and width in the cross section of the weft fibers of the second mesh body are a 4 and b 4 , respectively. When the flatness b 1 / a 1 of the warp fibers of the first mesh body and the flatness b 2 / a 2 of the weft fibers of the first mesh body are the same and fall within the range of 10-60 And the flatness b 3 / a 3 of the warp fibers of the second network and the flatness b 4 / a 4 of the weft fibers of the second network are the same and 60 or less. Adhesive sheet.
  3. 　前記発泡性基材の４０％圧縮時の圧縮硬さが５～２００Ｎ／３１４ｃｍ2である請求項１又は２記載の粘着シート。 The pressure-sensitive adhesive sheet according to claim 1 or 2, wherein the foaming base material has a compression hardness at 40% compression of 5 to 200 N / 314 cm 2 .
  4. 　前記たて繊維の扁平度Ｂ1／Ａ1が１５～４０の範囲内にあり、前記よこ繊維の扁平度Ｂ2／Ａ2が４０以下である請求項１記載の粘着シート。 The pressure-sensitive adhesive sheet according to claim 1, wherein the flatness B 1 / A 1 of the warp fibers is in the range of 15 to 40, and the flatness B 2 / A 2 of the weft fibers is 40 or less.
  5. 　前記第１網状体のたて繊維の扁平度ｂ1／ａ1及び前記第１網状体のよこ繊維の扁平度ｂ2／ａ2が同一でありかつ１５～４０の範囲内にあり、前記第２網状体のたて繊維の扁平度ｂ3／ａ3及び前記第２網状体のよこ繊維の扁平度ｂ4／ａ4が同一でありかつ４０以下である請求項２記載の粘着シート。 The flatness b 1 / a 1 of the warp fibers of the first network and the flatness b 2 / a 2 of the weft fibers of the first network are the same and are in the range of 15 to 40, The pressure-sensitive adhesive sheet according to claim 2, wherein the flatness b 3 / a 3 of the warp fibers of the two reticulate bodies and the flatness b 4 / a 4 of the weft fibers of the second reticulate body are the same and 40 or less.
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