WO2016084946A1 - Feuille adhésive pour dispositifs électroniques portables - Google Patents

Feuille adhésive pour dispositifs électroniques portables Download PDF

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Publication number
WO2016084946A1
WO2016084946A1 PCT/JP2015/083443 JP2015083443W WO2016084946A1 WO 2016084946 A1 WO2016084946 A1 WO 2016084946A1 JP 2015083443 W JP2015083443 W JP 2015083443W WO 2016084946 A1 WO2016084946 A1 WO 2016084946A1
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WO
WIPO (PCT)
Prior art keywords
pressure
sensitive adhesive
adhesive sheet
layer
resin
Prior art date
Application number
PCT/JP2015/083443
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English (en)
Japanese (ja)
Inventor
山本　修平
松下　喜一郎
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015164268A external-priority patent/JP6664166B2/ja
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to CN201580064283.9A priority Critical patent/CN107001870B/zh
Priority to US15/529,560 priority patent/US10596792B2/en
Priority to KR1020177011803A priority patent/KR102506412B1/ko
Publication of WO2016084946A1 publication Critical patent/WO2016084946A1/fr

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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

Definitions

  • the present invention relates to an adhesive sheet for portable electronic devices.
  • This application claims priority based on Japanese Patent Application No. 2014-242183 filed on November 28, 2014 and Japanese Patent Application No. 2015-164268 filed on August 21, 2015. The entire contents of these applications are hereby incorporated by reference.
  • a pressure-sensitive adhesive (also referred to as a pressure-sensitive adhesive, hereinafter the same) is in a soft solid (viscoelastic body) state in the temperature range near room temperature and has a property of easily adhering to an adherend by pressure.
  • the pressure-sensitive adhesive is in the form of a pressure-sensitive adhesive sheet with a base material provided with a pressure-sensitive adhesive layer on at least one surface of the base material, for example, fixing various articles, surface protection of various articles, Alternatively, it is widely used for the purpose of obtaining a desired appearance such as decoration.
  • Patent documents 1 and 2 are mentioned as literature which discloses this kind of conventional technology.
  • a release liner that protects the pressure-sensitive adhesive surface of the pressure-sensitive adhesive sheet for the purpose of preventing the generation of such bubbles or the like and imparting the property of removing the generated bubbles or the like (hereinafter also referred to as “air venting”).
  • Patent Document 1 A technique is known in which ridges are formed on the surface and grooves are formed on the surface of the pressure-sensitive adhesive layer of the sheet using the ridges (Patent Document 1). Air or the like that remains between the adhesive surface and the adherend can be removed from a groove formed on the surface of the adhesive layer.
  • Patent Document 2 is a prior art document disclosing that a non-adhesive layer is partially laminated on the surface of an adhesive layer.
  • the pressure-sensitive adhesive sheet used for the portable electronic device also tends to be thinner and thinner while maintaining necessary performance (for example, adhesive force).
  • the pressure-sensitive adhesive sheet having a groove on the pressure-sensitive adhesive surface as proposed in Patent Document 1 also restricts the depth of the groove when the thickness is reduced. Will be damaged.
  • the depth of the groove formed on the pressure-sensitive adhesive layer surface is less than 3 ⁇ m. If there is, the groove shrinks between bonding to the adherend due to the viscoelastic action of the pressure-sensitive adhesive layer corresponding to the time and temperature conditions from the release liner removal to bonding to the adherend. , Disappear. If it becomes so, desired air escape property cannot be obtained.
  • the present invention was created on the basis of the above knowledge, and has a good air escape property in a portable electronic device application in which the depth of the air escape means provided in the adhesive layer is limited. It is an object of the present invention to provide a pressure-sensitive adhesive sheet having a smooth adhesive surface and exhibiting good pressure-sensitive adhesive properties from an early stage after being attached to an adherend.
  • the adhesive sheet for portable electronic devices includes a film-like base material and a pressure-sensitive adhesive layer provided on at least one surface of the film-like base material.
  • the pressure-sensitive adhesive layer has a thickness of 20 ⁇ m or less.
  • it further includes a coat layer that partially covers the surface of the pressure-sensitive adhesive layer.
  • the thickness of the coat layer is less than 3 ⁇ m.
  • the pressure-sensitive adhesive sheet having the above-described configuration is particularly preferable for applications requiring thinning, typically for portable electronic devices. Moreover, since the thickness of the coat layer provided on the pressure-sensitive adhesive layer is limited to less than 3 ⁇ m, a decrease in smoothness on the pressure-sensitive adhesive sheet adhesion surface caused by the coat layer is suppressed or prevented. Furthermore, when the coating layer having the above thickness is attached to the adherend, the adhesive sheet adhesive surface composed of the adhesive and the coat layer is easy to fit into the adherend. Therefore, the pressure-sensitive adhesive sheet having the above-described structure exhibits good pressure-sensitive adhesive properties from an early stage after being attached to the adherend.
  • the ratio of the thickness T C of the coating layer to the thickness T A of the pressure-sensitive adhesive layer (T C / T A) is 0.75 or less.
  • T C / T A the ratio of the thickness T C of the coating layer to the thickness T A of the pressure-sensitive adhesive layer
  • a first pressure-sensitive adhesive layer provided on the first surface of the film-like base material, and a second surface of the film-like base material A second pressure-sensitive adhesive layer.
  • the coat layer is partially disposed on the surface of at least one of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer.
  • Such a double-sided adhesive pressure-sensitive adhesive sheet is preferably used for the purpose of fixing articles and members.
  • the thickness of the film-like substrate is less than 5 ⁇ m.
  • the limitation of the thickness of the base material is advantageous in terms of thinning the pressure-sensitive adhesive sheet, and the pressure-sensitive adhesive sheet including the base material having the above thickness can be preferably applied to portable electronic device applications.
  • the total thickness of the pressure-sensitive adhesive sheet is 50 ⁇ m or less. In such a thin pressure-sensitive adhesive sheet, the air release property by the technique disclosed herein is satisfactorily exhibited.
  • a pressure-sensitive adhesive sheet for a portable electronic device with a release liner comprising any of the pressure-sensitive adhesive sheets disclosed herein and a release liner that protects the adhesive surface of the pressure-sensitive adhesive sheet.
  • the surface of the release liner the surface on the adhesive surface side is preferably formed smoothly.
  • a release liner for pressure-sensitive adhesive sheets comprising a peelable support having at least one surface that is a peelable surface. On the peelable surface of the peelable support, a coat layer that can be transferred to an adhesive sheet is provided. And the thickness of the said coating layer is less than 3 micrometers.
  • a method for producing any one of the pressure-sensitive adhesive sheets disclosed herein includes a step of forming a pressure-sensitive adhesive layer on the peelable surface of the peelable support, and a step of transferring the pressure-sensitive adhesive layer to the surface of the film-like substrate.
  • a coat layer is partially formed on the peelable surface of the peelable support, and the step of forming the pressure-sensitive adhesive layer includes the peelability in which the coat layer is formed.
  • an adhesive layer is further formed on the surface.
  • no coat layer is formed on the peelable surface of the peelable support.
  • the process of removing the said peelable support body from the said adhesive layer is included after the process of transferring the said adhesive layer.
  • a step of superposing the pressure-sensitive adhesive layer on the adhesive layer is included after the process of transferring the said adhesive layer.
  • any one of the pressure-sensitive adhesive sheet manufacturing methods disclosed herein includes a step of partially forming a coat layer on a peelable surface of a peelable support; and the peeling having the coat layer formed thereon. Further forming a pressure-sensitive adhesive layer on the surface of the adhesive; and transferring the pressure-sensitive adhesive layer to the surface of the film-like substrate.
  • FIG. 2 is a cross-sectional view taken along line II-II in FIG. It is typical sectional drawing which expands and shows the cross section (cross section orthogonal to a longitudinal direction) of the part extended in the linear form of the coat layer which concerns on a preferable one aspect
  • FIG. 4 is a schematic cross-sectional view further enlarging a left end portion of the coat layer in FIG. 3. It is typical sectional drawing which expands and shows the right end part of the coating layer of FIG. 3 further. It is sectional drawing which shows typically the adhesive sheet with a peeling liner which concerns on one Embodiment. It is sectional drawing which shows typically the adhesive sheet with a peeling liner which concerns on other embodiment. It is sectional drawing which shows typically the peeling liner for adhesive sheets which concerns on one Embodiment.
  • the concept of the pressure-sensitive adhesive sheet in this specification includes what can be called pressure-sensitive adhesive tapes, pressure-sensitive adhesive labels, pressure-sensitive adhesive films, and the like.
  • the pressure-sensitive adhesive sheet disclosed herein may be in the form of a roll or a single sheet. Or the sheet
  • FIG. 1 is a top view schematically showing an adhesive sheet according to an embodiment
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
  • the pressure-sensitive adhesive sheet of this embodiment will be described with reference to the drawings.
  • the pressure-sensitive adhesive sheet 1 has a laminated structure of a film-like base material 10 and a pressure-sensitive adhesive layer 20.
  • the film-like substrate 10 supports the pressure-sensitive adhesive layer 20.
  • a surface 20A on the pressure-sensitive adhesive layer 20 side constitutes an adhesive surface 1A.
  • the other surface (surface on the film-like base material 10 side) 1B of the pressure-sensitive adhesive sheet 1 is a non-adhesive surface.
  • the coat layer 30 is partially disposed on the surface 20A of the pressure-sensitive adhesive layer 20.
  • the pressure-sensitive adhesive layer surface 20 ⁇ / b> A is partially covered by the coat layer 30.
  • the coat layer 30 serves as a passage through which air or the like passes between the pressure-sensitive adhesive sheet 1 and the adherend when the pressure-sensitive adhesive sheet 1 is bonded to the adherend, and imparts air release properties.
  • the thickness of the coat layer 30 is set to be less than 3 ⁇ m. As a result, good air escape properties can be obtained, and the adhesive surface 1A of the pressure-sensitive adhesive sheet 1 becomes smooth. In addition, good adhesive properties can be exhibited from an early stage after being attached to the adherend. Moreover, the laminateability and appearance of the coat layer 30 on the pressure-sensitive adhesive layer surface 20A are also improved.
  • the thickness of the coat layer is preferably 2 ⁇ m or less (typically less than 2 ⁇ m). In addition, the thickness of the coat layer 30 of this embodiment is about 1.5 ⁇ m. The thickness of the coat layer can be grasped by observing the cross section of the pressure-sensitive adhesive sheet with an SEM (scanning electron microscope) or a TEM (transmission electron microscope).
  • the thickness of the coat layer 30 is approximately the same as the thickness of the pressure-sensitive adhesive layer 20 or from the thickness of the pressure-sensitive adhesive layer 20. Is also preferably thin.
  • the ratio of the thickness T C of the coat layer 30 to the thickness T A of the adhesive layer 20 is 0.75 or less, more preferably 0.70 or less, more preferably Is 0.5 or less (for example, 0.4 or less).
  • the coat layer 30 presents a predetermined pattern (coat layer pattern) 40 on the adhesive surface 1A of the pressure-sensitive adhesive sheet 1.
  • the coat layer 30 has a lattice pattern 40.
  • the grid pattern 40 of the coat layer 30 is a first stripe pattern portion 42 and a second stripe arranged to intersect the first stripe pattern portion 42 on the adhesive surface 1A of the pressure-sensitive adhesive sheet 1. Pattern portion 44.
  • the first stripe pattern portion 42 is composed of a plurality of portions (portions extending linearly, in the present embodiment, strip-like portions) 50 extending linearly from one end of the bonding surface 1A to the other end.
  • the linearly extending portions 50 are arranged in parallel at intervals in the width direction.
  • the linearly extending portions 50 are arranged at angles at which the longitudinal direction intersects the end portions in the width direction of the pressure-sensitive adhesive sheet 1 and reach the both ends of the adhesive surface 1A, respectively.
  • the second stripe pattern portion 44 also includes a plurality of portions (linearly extending portions.
  • a strip shape) extending linearly from one end to the other end of the bonding surface 1 ⁇ / b> A.
  • Part 50, and the plurality of linearly extending parts 50 are arranged in parallel in the width direction at intervals.
  • the linearly extending portions 50 are arranged at angles at which the longitudinal direction intersects the end portions in the width direction of the pressure-sensitive adhesive sheet 1 and reach the both ends of the adhesive surface 1A, respectively.
  • the linearly extending portion 50 is a straight belt-like portion, but is not limited to this, and each linearly extending portion may extend in a curved shape.
  • a stripe pattern that can be formed by a plurality of linearly extending portions may be wavy.
  • the number of the part extended linearly can be determined by the relationship with the shape, size, etc. of the adhesive surface of an adhesive sheet, it is not restrict
  • first stripe pattern portion 42 and the second stripe pattern portion 44 are the linear extension portion 50 of the first stripe pattern portion 42 and the linear shape of the second stripe pattern portion 44. And the portion 50 extending in a crossing direction so as to be substantially orthogonal. Accordingly, the linearly extending portion 50 of the first stripe pattern portion 42 and the linearly extending portion 50 of the second stripe pattern portion 44 partially overlap each other.
  • the lattice pattern typically refers to a pattern including two stripe pattern portions intersecting each other, and not only an orthorhombic lattice as in the present embodiment, but also a square lattice and a triangular lattice. And various other lattice shapes.
  • the crossing angle (acute angle side) of the two striped pattern portions is 10 to 90 degrees (preferably 45 to 90 degrees, typically 60 to 90 degrees). It can be set within the range.
  • the lattice pattern disclosed herein includes a pattern including a stripe-shaped pattern portion composed of a plurality of linearly extending portions that repeatedly bend, for example, a pattern such as a hexagonal lattice.
  • Such a pattern may be a pattern in which adjacent linearly extending portions are partially connected.
  • the coat layer preferably has one or more stripe-shaped pattern portions.
  • the coat layer pattern (typically a lattice pattern) may have a third stripe pattern portion.
  • FIG. 3 is a schematic cross-sectional view showing an enlarged cross section (cross section orthogonal to the longitudinal direction) of the linearly extending portion of the coat layer
  • FIG. 4 is a further enlarged view of the left end portion of the coat layer of FIG.
  • FIG. 5 is a schematic cross-sectional view showing the right end portion of the coat layer in FIG. 3 further enlarged.
  • the linearly extending portion 50 of the coat layer 30 is a thin layer partially laminated on the surface 20 ⁇ / b> A of the pressure-sensitive adhesive layer 20, and is a first layer constituting the adhesive surface 1 ⁇ / b> A of the pressure-sensitive adhesive sheet 1. It has the surface 52 and the 2nd surface 54 located in the adhesive layer 20 side with respect to the 1st surface 52. As shown in FIG. Specifically, the surface of the linearly extending portion 50 includes a first surface 52 and a second surface (inner surface) 54 that is the opposite surface of the first surface (outer surface) 52.
  • the first surface 52 of the linearly extending portion 50 is flush with the outer surface of the pressure-sensitive adhesive layer 20 or slightly raised from the outer surface of the pressure-sensitive adhesive layer 20. From the viewpoint of air release, the first surface 52 of the linearly extending portion 50 is preferably slightly raised from the outer surface of the pressure-sensitive adhesive layer 20.
  • the raised height of the first surface of the linearly extending portion is the thickness of the linearly extending portion. It is preferably less than 30% (for example, less than 10%). Note that the thickness of the linearly extending portion is basically the same as the thickness of the coat layer.
  • the second surface 54 of the linearly extending portion 50 has a gentle curve as a whole in a cross section orthogonal to the longitudinal direction of the linearly extending portion 50.
  • a pressure sensitive adhesive sheet provided with a coat layer which partially covers the surface of pressure sensitive adhesive layer 20
  • the second surface 54 of the linearly extending portion 50 increases from the one end (left end in the drawing) 56 of the linearly extending portion 50 toward the center in the cross section. It has a portion that extends in a gentle curve in the depth direction of the pressure-sensitive adhesive layer 20 (the thickness direction of the pressure-sensitive adhesive layer 20).
  • the second surface 54 of the linearly extending portion 50 has a second end 54 (right end in the drawing) 58 of the linearly extending portion 50 as a starting point toward the center in the cross section. It has a portion that extends in a gentle curve in the depth direction of the pressure-sensitive adhesive layer 20 (the thickness direction of the pressure-sensitive adhesive layer 20). Thereby, the pressure-sensitive adhesive fits the coat layer 30 well. Since the end portions (one end 56 and the other end 58) can basically constitute the adhesive surface 1A of the pressure-sensitive adhesive sheet 1, the fact that the end portions are of high quality means that the adhesive surface 1A is of high quality. It leads. The one end 56 and the other end 58 are one end and the other end in the width direction of the linearly extending portion 50, respectively.
  • “consisting of a gentle curve as a whole” means that a gentle curve is drawn as a whole, and a part (for example, the bottom surface of the coat layer, etc.) has a straight line. May be.
  • a magnification of 10,000 times specifically, when an SEM or TEM cross-sectional image of a portion extending linearly of the coat layer is observed at a magnification of 10,000 times
  • the depth direction of the adhesive layer with a gentle curve as it goes to the center starting from one end of the linearly extending portion in this specification is limited to a specific inclination angle or curved shape.
  • the linearly extending portion on the line segment constituting the second surface 54 of the linearly extending portion 50 The depth of the second surface 54 at a point advanced by X ⁇ m from the one end (one end 56 and the other end 58) toward the center is less than 1 / ⁇ 2X ⁇ m (preferably less than 1 / ⁇ 3X ⁇ m
  • it has a gentle slope that always satisfies that it is less than 1 / 2X ⁇ m, for example, less than 1 / 3X ⁇ m.
  • the depth of the second surface 54 of the linearly extending portion 50 is the depth of the second surface 54 with respect to the outer surface of the pressure-sensitive adhesive layer 20 (strictly speaking, the virtual plane formed by the outer surface of the pressure-sensitive adhesive layer 20).
  • Shall point to. X is a positive integer, and the upper limit is 1 ⁇ 2 of the width of the linearly extending portion 50.
  • the second portion 50 of the linearly extending portion 50 is in the range where X is 10 ⁇ m or less (more specifically, 5 ⁇ m or less).
  • the depth of the second surface 54 is less than 1 / ⁇ 3X ⁇ m (preferably at a point advanced by X ⁇ m from the one end of the linearly extending portion 50 toward the center. It is preferable to always satisfy that it is less than 1 / 2X ⁇ m, more preferably less than 1 / 3X ⁇ m, for example less than 1 / 4X ⁇ m.
  • the second surface 54 of the linearly extending portion 50 includes an inclined portion 60 and a flat portion 62 that continues from the inclined portion 60.
  • the inclined portion 60 has a shape extending in the depth direction of the pressure-sensitive adhesive layer 20 from one end 56 of the linearly extending portion 50 in the cross section.
  • the flat part 62 of the said 2nd surface 54 is an area
  • the inclined portion 60 has a width of about 10 ⁇ m from the one end 56 in the width direction of the linearly extending portion 50 to the center in the width direction and the width from the other end 58 in the width direction of the linearly extending portion 50. It is formed in an area of about 10 ⁇ m on the center side in the direction.
  • the other region on the second surface 54 (which can be said to be the bottom of the coat layer 30) is a flat portion 62.
  • the inclined portion 60 is convexly curved toward the pressure-sensitive adhesive layer 20 side.
  • the region where the inclined portion is formed is not limited to the above, and the inclined portion has a width of the portion extending linearly when the depth of the deepest portion of the portion extending linearly of the coat layer is D ⁇ m. It may be formed in a region of 10 ⁇ D ⁇ m (typically 7 ⁇ D ⁇ m, for example, 4 ⁇ D ⁇ m) from one end or the other end in the direction to the center in the width direction. For example, when the depth of the deepest portion of the linearly extending portion of the coat layer is within the range of 0.5 to 2 ⁇ m, the inclined portion has a width from one end or the other end in the width direction of the linearly extending portion.
  • the depth of the linearly extending portion is the depth of the second surface of the linearly extending portion, and the pressure-sensitive adhesive layer outer surface (strictly speaking, a virtual plane formed by the pressure-sensitive adhesive layer outer surface) The depth of the linearly extending portion with respect to is to be pointed out. The same applies to the depth of the deepest part.
  • the inclined portion 60 extends from the one end 56 and the other end 58 in the width direction of the linearly extending portion 50 to a point at least about 1 ⁇ m (for example, 2 ⁇ m, typically 3 ⁇ m) in the center in the width direction.
  • Inclination (specifically, the angle formed by the adhesive surface 1A and the inclined portion 60 in the cross section is, for example, an angle that can be recognized by a cross-sectional image (for example, SEM cross-sectional image) with a magnification of 10,000 times 5 degrees or more, typically 10 degrees or more).
  • the degree of inclination of the inclined portion 60 is within a range in which the angle formed by the adhesive surface 1A and the inclined portion 60 in the cross section is approximately 60 degrees or less (for example, 45 degrees or less, typically 30 degrees or less). Is appropriate.
  • the depth of the deepest portion of the linearly extending portion 50 of the coat layer 30 in this embodiment is about 1.5 ⁇ m, but the depth of the deepest portion is not limited to this.
  • the depth of the deepest portion of the linearly extending portion of the coat layer is preferably about half or less (for example, 1/3 or less, typically 1/5 or less) of the thickness of the pressure-sensitive adhesive layer.
  • the depth of the deepest part of the linearly extending portion of the coat layer is 0.1 ⁇ m or more (for example, 0.5 ⁇ m or more, typically 1 ⁇ m or more) from the viewpoint of air release. preferable.
  • the depth of the deepest part is preferably 10 ⁇ m or less, more preferably 5 ⁇ m or less (for example, 3 ⁇ m or less, typically 2 ⁇ m or less).
  • the depth of the deepest portion of the coat layer that extends linearly is substantially the same as the thickness of the coat layer.
  • the depth of the deepest part of the part extended linearly of a coat layer can be grasped
  • the coat layer disclosed here is not limited to the one having the cross-sectional shape described above.
  • the linearly extending portion of the coat layer may have a quadrangular, trapezoidal, triangular shape or the like in the cross section orthogonal to the longitudinal direction.
  • the width (W1) of each linearly extending portion 50 of the coat layer 30 is approximately 200 ⁇ m in the present embodiment, but is not limited thereto. In a preferred embodiment, the width (W1) of each linearly extending portion of the coat layer is set within a range of 0.1 to 2 mm. Thereby, it is possible to achieve both high adhesive strength with time and good air escape.
  • the width (W1) of the linearly extending portion is more preferably 0.2 mm or more, still more preferably 0.3 mm or more, and particularly preferably 0.5 mm or more, from the viewpoint of improving the air escape property. In another preferred embodiment, the width (W1) of each linearly extending portion of the coat layer is about 10 ⁇ m or more.
  • the width (W1) of each linearly extending portion of the coat layer is preferably 50 ⁇ m or more, more preferably 100 ⁇ m or more, and even more preferably 150 ⁇ m or more.
  • the width (W1) of the linearly extending portion is more preferably 1.2 mm or less, further preferably 1.0 mm or less, particularly preferably 0.7 mm or less, Especially preferably, it is 0.5 mm or less, Most preferably, it is 0.4 mm or less.
  • the width (W1) of the linearly extending portion of the first stripe pattern portion and the width (W1) of the linearly extending portion of the second stripe pattern portion may be the same or different. Good.
  • the linearly extending portion has a ratio of the width W to the thickness T (W / T) of about 50 or more.
  • the ratio (W / T) is more preferably about 80 or more, and further preferably 100 or more (typically 120 or more).
  • the ratio (W / T) is preferably about 500 or less (for example, 200 or less, typically 165 or less).
  • the interval (W2) between the linearly extending portions 50 constituting the first stripe pattern portion 42 of the coat layer 30 is about 1.8 mm in the present embodiment, and the linear stripe portion constituting the second stripe pattern portion 44 is formed.
  • the interval (W2) between the portions 50 extending in the same manner is the same, but is not limited thereto.
  • the interval (W2) between the linearly extending portions constituting the first stripe pattern portion is preferably set within a range of 1.0 to 10 mm. Thereby, the tendency for high adhesive force with time and air-release property to be balanced is enhanced.
  • the interval (W2) between the linearly extending portions refers to the width of the portion existing between two adjacent linearly extending portions on the adhesive surface of the pressure-sensitive adhesive sheet.
  • the distance (W2) between the linearly extending portions is more preferably 1.5 mm or more, and still more preferably 2.5 mm or more, from the viewpoint of improving adhesive strength with time.
  • the interval (W2) between the linearly extending portions may be about 8 mm or less (for example, 5 mm or less, typically 3 mm or less).
  • the interval (W2) between the linearly extending portions constituting the second stripe pattern portion is also preferably set from the range exemplified as the interval (W2) between the linearly extending portions constituting the first stripe pattern portion.
  • the interval (W2) is preferably an equal interval.
  • the interval (W2) between the linearly extending portions constituting the first stripe pattern portion and the interval (W2) between the linearly extending portions constituting the second stripe pattern portion may be the same, May be different.
  • the pitch of the linearly extending portions is preferably in the range of 1 to 20 mm from the viewpoint of achieving a balance between high adhesive strength with time and air release.
  • the pitch of the linearly extending portion is more preferably 1.5 mm or more, further preferably 2 mm or more (for example, 2.5 mm or more), more preferably 15 mm or less (for example, 12 mm or less), and further preferably 5 mm. It is as follows.
  • the said pitch shall point out the distance (space
  • the surface 20A of the pressure-sensitive adhesive layer 20 when attention is paid to the surface 20A of the pressure-sensitive adhesive layer 20, the surface 20A of the pressure-sensitive adhesive layer 20 is not provided with the coat layer arrangement portion 70 in which the coat layer 30 is arranged and the coat layer 30. It can be expressed that the adhesive layer 20 has the coating layer non-arranged portion 72 exposed on the outer surface.
  • the configuration (shape, arrangement state, arrangement relationship, size, etc.) of the coat layer arrangement portion 70 on the pressure-sensitive adhesive layer surface 20 ⁇ / b> A is the same as that of the coat layer 30 on the adhesive surface 1 ⁇ / b> A of the pressure-sensitive adhesive sheet 1.
  • the coat layer arrangement portion 70 has a pattern (lattice pattern) having the same configuration as the coat layer pattern 40, a first stripe pattern portion having the same configuration as the first stripe pattern portion 42, and a second The second stripe pattern portion having the same configuration as the stripe pattern portion 44 is provided. Further, the first stripe pattern portion of the coat layer arrangement portion 70 has a linearly extending portion having the same configuration as the linearly extending portion 50 of the first stripe pattern portion 42. The second stripe pattern portion has a linearly extending portion having the same configuration as the linearly extending portion 50 included in the second stripe pattern portion 44 of the coat layer 30. Therefore, the description regarding the structure of the coat layer arrangement
  • the pressure-sensitive adhesive sheet 1 can be in the form of a pressure-sensitive adhesive sheet 1 with a release liner having a configuration protected by a release liner 100 having a release surface on the adhesive surface 1A side, as shown in FIG.
  • the back surface of the film-like substrate 10 (the surface opposite to the surface on the pressure-sensitive adhesive layer 20 side) is a release surface, and the pressure-sensitive adhesive layer 20 is formed on the back surface by winding the pressure-sensitive adhesive sheet 1.
  • abutted and the adhesive layer 20 was protected by the back surface of the film-form base material 10 may be sufficient.
  • the pressure-sensitive adhesive sheet disclosed here is a double-sided adhesive type pressure-sensitive adhesive sheet with a base material (double-sided pressure-sensitive adhesive sheet) shown in FIG. Non-peelable) are provided with pressure-sensitive adhesive layers 21 and 22, respectively, and the pressure-sensitive adhesive layers 21 and 22 are protected by release liners 101 and 102, at least the pressure-sensitive adhesive layer side being a release surface, respectively. It may have.
  • the coat layer 30 is partially disposed only on the surface of the pressure-sensitive adhesive layer 21, and no coat layer is provided on the surface of the pressure-sensitive adhesive layer 22.
  • the double-sided pressure-sensitive adhesive sheet is provided with a pressure-sensitive adhesive layer on each surface of the film-like substrate (both are non-peelable), and one of the pressure-sensitive adhesive layers has both surfaces separated from each other. You may have the structure protected by the release liner which has become.
  • This type of pressure-sensitive adhesive sheet has a configuration in which two pressure-sensitive adhesive layers are protected by one release liner by winding the pressure-sensitive adhesive sheet and bringing the other pressure-sensitive adhesive layer into contact with the back surface of the release liner.
  • the double-sided pressure-sensitive adhesive sheet is preferably used, for example, for joining and fixing.
  • the area ratio of the coating layer non-arranged portion on the pressure-sensitive adhesive layer surface (which may be the area ratio of the coating layer on the adhesive surface of the pressure-sensitive adhesive sheet) is preferably 70% or more. Thereby, high adhesive strength with time can be ensured.
  • the area ratio is more preferably 75% or more, and still more preferably 80% or more. From the viewpoint of obtaining good air escape properties, the area ratio is preferably 90% or less, more preferably 85% or less.
  • the adhesive surface of the pressure-sensitive adhesive sheet (typically composed of the outer surface of the pressure-sensitive adhesive layer and the surface of the coat layer) is 2 N / 20 mm or more (preferably 5 N / 20 mm or more, more preferably 8 N /
  • the adhesive strength after 24 hours of 20 mm or more is shown.
  • the adhesive strength after the lapse of 24 hours may be measured by the following method. Specifically, for a measurement sample obtained by cutting the pressure-sensitive adhesive sheet into a size having a width of 20 mm and a length of 100 mm, the adhesion surface of the measurement sample is the surface of a stainless steel plate (SUS304BA plate) in an environment of 23 ° C. and 50% RH.
  • SUS304BA plate stainless steel plate
  • the pressure-sensitive adhesive sheet is a transparent (including translucent) pressure-sensitive adhesive sheet.
  • a transparent (including translucent) pressure-sensitive adhesive sheet when bubbles or the like are mixed between the pressure-sensitive adhesive sheet and the adherend, the bubbles and the like are visually recognized through the pressure-sensitive adhesive sheet, and the appearance is easily impaired. According to the technology disclosed herein, generation of bubbles or the like between the pressure-sensitive adhesive sheet and the adherend is prevented, so that an excellent appearance can be obtained in a pressure-sensitive adhesive sheet having transparency.
  • an adhesive sheet is transparent means that the component (an adhesive layer, a film-form base material, and a coating layer) of an adhesive sheet is transparent.
  • the pressure-sensitive adhesive sheet and its constituent elements are transparent that the pressure-sensitive adhesive sheet and its constituent elements exhibit a total light transmittance of 50% or more.
  • the total light transmittance may be 80% or more (for example, 90% or more, typically 95% or more).
  • the haze value of an adhesive sheet is 10% or less (for example, 5% or less).
  • the total light transmittance and haze value are measured using a commercially available transmissometer (for example, trade name “HAZEMETER HM-150”, manufactured by Murakami Color Research Laboratory Co., Ltd.) in accordance with JIS K 7136: 2000. do it.
  • the total light transmittance and haze value of a film-like substrate described later are also measured by the same method.
  • the total thickness of the pressure-sensitive adhesive sheet (including the pressure-sensitive adhesive layer and the base material but not including the release liner) disclosed herein is not particularly limited, and is suitably in the range of about 2 to 1000 ⁇ m.
  • the thickness is preferably 5 to 500 ⁇ m (for example, 10 to 300 ⁇ m, typically 30 to 100 ⁇ m).
  • the total thickness of the pressure-sensitive adhesive sheet is 50 ⁇ m or less, more preferably 30 ⁇ m or less (for example, 15 ⁇ m or less, typically 5 ⁇ m or less). According to the technique disclosed herein, even if the pressure-sensitive adhesive sheet has a limited total thickness as described above, good air escape characteristics can be obtained.
  • the pressure-sensitive adhesive sheet having a limited total thickness can be advantageous in terms of reducing the size, weight, and resource saving of the product to which the pressure-sensitive adhesive sheet is applied.
  • the thickness tolerance of the pressure-sensitive adhesive sheet disclosed herein is preferably 50% or less. According to the pressure-sensitive adhesive sheet having a small thickness tolerance, more excellent pressure-sensitive adhesive properties can be exhibited.
  • the thickness tolerance is more preferably 40% or less, further preferably 30% or less, and particularly preferably 20% or less.
  • the thickness tolerance of the pressure-sensitive adhesive sheet is measured by the method described in Examples described later.
  • a resin film, paper, cloth, rubber film, foam film, metal foil, a composite or laminate of these, and the like can be used.
  • a resin film layer is included from a viewpoint of sticking property or an external appearance property.
  • the inclusion of the resin film layer is advantageous from the viewpoint of dimensional stability, thickness accuracy, workability, tensile strength, and the like.
  • resin films examples include polyolefin resin films such as polyethylene (PE), polypropylene (PP), and ethylene / propylene copolymers; polyester resin films such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate; Vinyl chloride resin film; vinyl acetate resin film; polyimide resin film; polyamide resin film; fluorine resin film; cellophane; Preferable examples include resin films formed from PE, PP, and PET. Among the resin films, a polyester film is more preferable, and a PET film is more preferable among them.
  • the film-like substrate may have a single layer structure or may have a multilayer structure of two layers or three or more layers.
  • the film-like base material is a base material (foam-containing base material) provided with a foam film.
  • the foam film refers to a film-like structure provided with a portion having bubbles (bubble structure).
  • the foam-containing base material may be a single-layer structure composed of a foam film, or a multilayer in which at least one of two or more multilayer structures is composed of a foam film (foam layer). It may be a structure.
  • a foam containing base material the composite base material with which the foam film (foam layer) and the non-foam film (non-foam layer) were laminated
  • Non-foamed film refers to a film-like structure that has not undergone intentional treatment (for example, bubble introduction treatment) to make a foam, and a film that does not substantially have a bubble structure.
  • a typical example of a non-foam film is a resin film (for example, a polyester-based resin film such as PET) having an expansion ratio of less than 1.1 times (for example, less than 1.05 times, typically less than 1.01 times).
  • the film-like substrate includes two or more foam layers, the materials and structures of these foam layers may be the same or different.
  • the contact bonding layer may be arrange
  • the average cell diameter of the foam film is not particularly limited, but is usually suitably 10 ⁇ m to 200 ⁇ m, preferably 20 ⁇ m to 180 ⁇ m, and more preferably 30 ⁇ m to 150 ⁇ m.
  • the average cell diameter is 10 ⁇ m or more, the impact absorbability tends to be improved.
  • the average cell diameter is 200 ⁇ m or less, the handleability and waterproofness (water-stopping property) tend to be improved.
  • the average cell diameter ( ⁇ m) of the foam film can be determined by taking an enlarged image of the foam cross section and analyzing the image using a commercially available low vacuum scanning electron microscope.
  • the number of bubbles to be analyzed may be about 10-20.
  • As the low vacuum scanning electron microscope for example, a trade name “S-3400N scanning electron microscope” manufactured by Hitachi High-Tech Science Systems, Inc. can be used.
  • the density (apparent density) of the foam film is not particularly limited, but is usually suitably 0.01 g / cm 3 or more, preferably 0.01 to 0.7 g / cm 3 , Preferably, it is 0.02 to 0.5 g / cm 3 .
  • the density is not particularly limited, but is usually suitably 0.01 g / cm 3 or more, preferably 0.01 to 0.7 g / cm 3 , Preferably, it is 0.02 to 0.5 g / cm 3 .
  • the density (apparent density) of the foam film is measured according to the method described in JIS K 7222: 1999. Specifically, a foam film is punched into a size of 100 mm ⁇ 100 mm to prepare a sample, and the dimension of the sample is measured. Further, the thickness of the sample is measured using a 1/100 dial gauge having a measurement terminal diameter of 20 mm. The volume of the foam film sample is calculated from these values. Further, the weight of the sample is measured with an upper pan balance having a minimum scale of 0.01 g or more. From these values, the apparent density (g / cm 3 ) of the foam film can be determined.
  • the 50% compressive load of the foam film is not particularly limited. From the viewpoint of impact resistance, it is appropriate that the foam film exhibits a 50% compressive load of 0.1 N / cm 2 or more. When the 50% compression load is equal to or greater than the predetermined value, for example, even when the foam film is thin (for example, about 100 ⁇ m thick), sufficient resistance when compressed (to push back when compressed) Force), and good impact resistance can be maintained.
  • the 50% compressive load is preferably 0.2 N / cm 2 or more, more preferably 0.5 N / cm 2 or more.
  • the 50% compression load is suitably 8 N / cm 2 or less, preferably 6 N / cm 2 or less, more preferably 3 N / cm 2 or less.
  • the 50% compression load (hardness) of the foam film is measured according to JIS K 6767: 1999. Specifically, the foam film is cut out to 100 mm ⁇ 100 mm, laminated so that the total thickness is 2 mm or more, and this is used as a measurement sample. When the sample was compressed at a speed of 10 mm / min using a compression tester at room temperature, and the compression rate reached 50% (compressed to 50% of the initial thickness) The value after 10 seconds holding (repulsive stress: N / cm 2 ) is recorded as a 50% compression load. About other conditions (for example, a jig
  • the cell structure of the foam constituting the foam film disclosed herein is not particularly limited.
  • the cell structure may be any of an open cell structure, a closed cell structure, and a semi-continuous semi-closed cell structure. From the viewpoint of impact absorption, an open cell structure and a semi-open semi-closed cell structure are preferable.
  • the material of the foam film is not particularly limited.
  • the foam film can be formed from a material that typically includes a polymer component (eg, a thermoplastic polymer).
  • a foam film formed of a foam of a plastic material (plastic foam) is preferable.
  • the plastic material for forming the plastic foam (meaning including rubber material) is not particularly limited, and can be appropriately selected from known plastic materials.
  • Plastic materials typically thermoplastic polymers
  • the main component of the polymer component contained in the film-like substrate or the foam film may be hereinafter referred to as “base polymer”.
  • foams include polyolefin resin foams such as PE foams and PP foams; polyester resin foams such as PET foams, polyethylene naphthalate foams, polybutylene terephthalate foams, etc. Body; Polyvinyl chloride resin foam such as polyvinyl chloride foam; Vinyl acetate resin foam; Acrylic resin foam; Polyphenylene sulfide resin foam; Polyamide (nylon) resin foam; Amide resin foams such as wholly aromatic polyamide (aramid) resin foams; Polyimide resin foams; Polyetheretherketone (PEEK) foams; Polystyrene ether foams such as polystyrene foams And urethane resin foams such as polyurethane resin foam; and the like. Further, as the foam, a rubber-based resin foam such as a polychloroprene rubber foam may be used.
  • a rubber-based resin foam such as a polychloroprene rubber foam may be used as a polychloroprene
  • an acrylic resin foam (acrylic resin foam) is used as the foam.
  • the acrylic resin foam refers to a foam containing an acrylic polymer as a base polymer.
  • the definition of the acrylic polymer in the present specification is as described below.
  • the alkyl (meth) acrylate constituting the acrylic polymer is one kind of alkyl (meth) acrylate having a chain alkyl group having 1 to 20 carbon atoms (preferably 1 to 8, typically 1 to 4). Or 2 or more types are used preferably.
  • Preferable examples of the alkyl (meth) acrylate include ethyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate.
  • the amount of the alkyl (meth) acrylate as the main monomer is suitably 70% by weight or more, preferably 75% by weight or more (for example, 80% by weight or more) in the total monomer components of the acrylic polymer.
  • the amount of the alkyl (meth) acrylate is suitably 98% by weight or less, preferably 97% by weight or less (for example, 96% by weight or less) in all monomer components.
  • the secondary monomer copolymerizable with the main monomer, alkyl (meth) acrylate can be useful for introducing a crosslinking point into the acrylic polymer or increasing the cohesive strength of the acrylic polymer.
  • a secondary monomer for example, a carboxy group-containing monomer, a hydroxyl group-containing monomer, an acid anhydride group-containing monomer, an amide group-containing monomer, an amino group-containing monomer, a cyano group-containing monomer, a functional group-containing monomer such as a monomer having a nitrogen atom-containing ring 1 type (s) or 2 or more types can be used.
  • the secondary monomer may also be a vinyl ester monomer such as vinyl acetate, an aromatic vinyl compound such as styrene, a sulfonic acid group-containing monomer, a phosphoric acid group-containing monomer, and the like.
  • the amount of the submonomer is suitably 0.5% by weight or more, preferably 1% by weight or more in the total monomer component of the acrylic polymer.
  • the amount of the submonomer is suitably 30% by weight or less, preferably 10% by weight or less, based on all monomer components.
  • the monomer component constituting the acrylic polymer is used as a sub-monomer. It is preferable that a nitrogen atom-containing monomer is contained. As a result, bubbles are likely to be generated during foaming, and when the foam is formed (typically, when the resin composition is dried), the viscosity of the composition increases and the bubbles are retained in the foam. The effect of being easy can be exhibited.
  • nitrogen atom-containing monomer examples include cyano group-containing monomers such as acrylonitrile and methacrylonitrile; lactam ring-containing monomers such as N-vinyl-2-pyrrolidone; (meth) acrylamide, N-hydroxyethyl (meth) acrylamide, Amide group-containing monomers such as N-methylolacrylamide, N, N-dimethylacrylamide, N, N-diethylacrylamide, and diacetoneacrylamide; These can be used alone or in combination of two or more. Of these, cyano group-containing monomers such as acrylonitrile and lactam ring-containing monomers such as N-vinyl-2-pyrrolidone are preferred.
  • the amount of the nitrogen atom-containing monomer is suitably 2% by weight or more, preferably 3% by weight or more (for example, 4% by weight or more) in the total monomer components of the acrylic polymer.
  • the amount of the nitrogen atom-containing monomer is suitably 30% by weight or less, preferably 25% by weight or less (for example, 20% by weight or less) in all monomer components.
  • the method for obtaining the acrylic polymer is not particularly limited.
  • a method for synthesizing the acrylic polymer such as solution polymerization method, emulsion polymerization method, bulk polymerization method, suspension polymerization method, active energy ray polymerization method (for example, UV polymerization method).
  • Various known polymerization methods can be appropriately employed.
  • a monomer mixture is dissolved or dispersed in a suitable polymerization solvent (toluene, ethyl acetate, water, etc.), and a polymerization operation is performed using a polymerization initiator such as an azo polymerization initiator or a peroxide initiator.
  • a desired acrylic polymer can be obtained.
  • An acrylic resin foam (emulsion-type acrylic resin foam) obtained by an emulsion polymerization method is preferably used in terms of foamability and environmental aspects.
  • the acrylic resin foam-forming composition preferably contains a cross-linking agent from the viewpoint of increasing the cohesive strength.
  • the type of the crosslinking agent is not particularly limited, and one or more of various crosslinking agents can be appropriately selected and used.
  • the crosslinking agent include an isocyanate crosslinking agent, an epoxy crosslinking agent, an oxazoline crosslinking agent, a carbodiimide crosslinking agent, a melamine crosslinking agent, and a metal oxide crosslinking agent. Of these, oxazoline-based crosslinking agents are preferred.
  • the amount of the crosslinking agent used is not particularly limited, and is from about 10 parts by weight or less (for example, about 0.005 to 10 parts by weight, preferably about 0.01 to 5 parts by weight) with respect to 100 parts by weight of the acrylic polymer. It is appropriate to select.
  • a polyolefin resin foam (polyolefin resin foam) is used as the foam.
  • plastic material constituting the polyolefin foam various known or commonly used polyolefin resins can be used without particular limitation.
  • polyethylene such as low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), metallocene catalyst type linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene- A vinyl acetate copolymer etc. are mentioned.
  • LDPE low density polyethylene
  • LLDPE linear low density polyethylene
  • HDPE high density polyethylene
  • metallocene catalyst type linear low density polyethylene polypropylene
  • ethylene-propylene copolymer ethylene- A vinyl acetate copolymer etc.
  • Such polyolefin resin can be used individually by 1 type or in combination of 2 or more types as appropriate.
  • a polyethylene foam film substantially composed of a polyethylene resin foam examples thereof include a polypropylene-based foam film substantially composed of a foam.
  • the polyethylene-based resin refers to a resin having ethylene as a main monomer (that is, a main component of the monomer), and other than HDPE, LDPE, LLDPE, etc., the ethylene copolymerization ratio exceeds 50% by weight.
  • -Propylene copolymer, ethylene-vinyl acetate copolymer, etc. may be included.
  • a polypropylene resin refers to a resin having propylene as a main monomer.
  • a polypropylene-based foam film can be preferably employed.
  • the foaming method of the foam film is not particularly limited, and methods such as a chemical method and a physical method can be used alone or in combination depending on the purpose and operability.
  • a physical foaming method is preferable from the viewpoint of contamination and the like.
  • a foaming method in which a low-boiling compound such as hydrocarbon or a foaming agent such as thermal expansion microspheres is contained in the film-forming material, and bubbles are formed from the foaming agent, a gas such as air mechanically And the like, a solvent removal foaming method using removal of a solvent such as water, a foaming method using a supercritical fluid, and the like.
  • a method of forming a foam film by injecting an inert gas (for example, oxygen dioxide) into a polymer for forming a foam film under pressure and reducing the pressure can be preferably employed.
  • an inert gas for example, oxygen dioxide
  • the average cell diameter can be easily limited to a predetermined value or less, and the foam film can be easily reduced in density.
  • a foam film is produced.
  • the formation of the foam film is not particularly limited.
  • a foaming method in which a gas such as air is mechanically mixed is employed, a resin composition containing bubbles (for example, an emulsion type resin composition) is then used.
  • a foam film can be obtained by applying on a substrate or release paper and drying.
  • the drying preferably includes a preliminary drying step of 50 ° C. or more and lower than 125 ° C. and a main drying step of 125 ° C. to 200 ° C. from the viewpoint of bubble stability and the like.
  • a film-like foam may be continuously formed using a calendar, an extruder, a conveyor belt casting, or the like, and a method of foam-molding a kneaded product of the foam-forming material may be employed.
  • the surface layer portion may be removed by slicing and adjusted to have a desired thickness and foam characteristics.
  • the thermoplastic polymer that can be included in the foam film may include a thermoplastic elastomer that exhibits properties as a rubber at room temperature and exhibits thermoplasticity at a high temperature.
  • a thermoplastic elastomer such as ethylene-propylene copolymer, ethylene-propylene-diene copolymer, ethylene-vinyl acetate copolymer, polybutene, polyisobutylene, chlorinated polyethylene; styrene -Styrene elastomers such as butadiene-styrene copolymers; thermoplastic polyester elastomers; thermoplastic polyurethane elastomers; thermoplastic acrylic elastomers; Among them, a thermoplastic elastomer having a glass transition temperature of room temperature or lower (for example, 20 ° C. or lower) is preferably used.
  • foam film forming materials for example, emulsion type acrylic resin compositions
  • foaming agents such as anionic surfactants and cationic surfactants.
  • Various surfactants such as an agent, a nonionic surfactant, and an amphoteric surfactant can be used. Hydrocarbon or fluorine surfactants may be used.
  • anionic surfactants are preferred from the viewpoint of finer bubble diameter and bubble stability, and fatty acid ammonium (typically higher fatty acid ammonium) surfactants such as ammonium stearate are more preferred.
  • the said surfactant can be used individually by 1 type or in combination of 2 or more types.
  • the surfactant content is preferably about 0.1 to 10 parts by weight (eg 0.5 to 8 parts by weight) with respect to 100 parts by weight of the base polymer of the foam film.
  • the foaming agent in this specification includes not only an agent exhibiting a foaming action but also a bubble stabilizer such as a bubble diameter adjusting agent for reducing the bubble diameter and a foam stabilizer.
  • the foam film-forming material is an aqueous dispersion (for example, an acrylic emulsion)
  • a silicone compound as the foaming agent.
  • the silicone compound a silicone compound having a siloxane bond of 2000 or less is preferable.
  • the silicone compound include silicone oil, modified silicone oil, and silicone resin. Of these, dimethyl silicone oil and methylphenyl silicone oil are preferable.
  • a silicone-modified polymer for example, silicone-modified acrylic polymer, silicone-modified urethane polymer, etc.
  • the content of the silicone compound is 0.01 to 5 parts by weight (eg 0.05 to 4 parts by weight, typically 0.1 to 3 parts by weight) with respect to 100 parts by weight of the base polymer of the foam film. It is preferable to set the degree.
  • the foam film-forming material may contain a thickener.
  • the thickener is not particularly limited, and examples thereof include an acrylic acid thickener, a urethane thickener, and a polyvinyl alcohol thickener. Of these, polyacrylic acid thickeners and urethane thickeners are preferred.
  • the content of the thickener is preferably about 0.1 to 10 parts by weight (for example, 0.1 to 5 parts by weight) with respect to 100 parts by weight of the base polymer of the foam film.
  • the foam film When a foam-containing substrate is used as the film-like substrate, the foam film preferably contains a cell nucleating agent such as a metal hydroxide (for example, magnesium hydroxide).
  • a cell nucleating agent such as a metal hydroxide (for example, magnesium hydroxide).
  • the cell nucleating agent may be a metal oxide, composite oxide, metal carbonate, metal sulfate or the like.
  • the content of the cell nucleating agent is preferably about 0.5 to 125 parts by weight (for example, 1 to 120 parts by weight) with respect to 100 parts by weight of the base polymer of the foam film.
  • the foam film contains a gas permeation inhibitor such as fatty acid amide from the viewpoint of suppressing the permeation of gas components from the foam during the formation of bubbles. It is preferable.
  • the fatty acid amide is more preferably one having a bisamide structure.
  • the gas permeation inhibitor may be a fatty acid metal salt.
  • the content of the gas permeation inhibitor is about 0.5 to 10 parts by weight (for example, 0.7 to 8 parts by weight, typically 1 to 6 parts by weight) with respect to 100 parts by weight of the base polymer of the foam film. It is preferable to do.
  • the film-like substrate may contain a softening agent for the purpose of imparting desired fluidity to the film-forming material and improving properties such as flexibility.
  • a softening agent for the purpose of imparting desired fluidity to the film-forming material and improving properties such as flexibility.
  • properties such as film stretchability and expansion ratio can be preferably adjusted.
  • hydrocarbon softeners such as liquid paraffin, paraffin wax, microwax and polyethylene wax, ester softeners such as stearic acid monoglyceride, and fatty acid softeners can be preferably used. .
  • the content of the softening agent is 0.5 to 50 parts by weight (for example, 0.8 to 40 parts by weight, typically 1 to 30 parts) with respect to 100 parts by weight of the base polymer of the film-like substrate (for example, foam film). Part by weight) is preferable.
  • an arbitrary rust inhibitor may be included to prevent corrosion of the metal member adjacent to the foam film.
  • an azole ring-containing compound is preferable.
  • an azole ring-containing compound it is possible to achieve both high levels of metal corrosion prevention and adhesion to an adherend.
  • compounds in which the azole ring forms a condensed ring with an aromatic ring such as a benzene ring are preferred, and benzotriazole compounds and benzothiazole compounds are particularly preferred.
  • the content of the rust inhibitor is preferably about 0.2 to 5 parts by weight (for example, 0.3 to 2 parts by weight) with respect to 100 parts by weight of the base polymer of the foam film.
  • the film-like substrate has transparency (including translucency).
  • the pressure-sensitive adhesive sheet having such a film-like substrate when bubbles or the like are mixed between the pressure-sensitive adhesive sheet and the adherend, the bubbles are visually recognized through the pressure-sensitive adhesive sheet, and the appearance is easily impaired. According to the technique disclosed herein, generation of bubbles or the like between the pressure-sensitive adhesive sheet and the adherend is prevented, so that excellent appearance can be obtained in a configuration including a transparent substrate.
  • the film-like substrate may exhibit a total light transmittance of 80% or more (for example, 90% or more, typically 95% or more).
  • the haze value of a film-form base material is 10% or less (for example, 5% or less).
  • the film-like substrate (for example, a resin film) may be colored black, white, or other colors by including various colorants (for example, pigments) in order to impart desired designability and optical characteristics. Carbon black is preferred as the black colorant.
  • a filler inorganic filler, organic filler, etc.
  • an anti-aging agent for example, an antioxidant, an ultraviolet absorber, as necessary.
  • various additives such as an antistatic agent, a lubricant and a plasticizer may be further blended.
  • the surface (back surface) opposite to the surface on which the pressure-sensitive adhesive layer is provided is formed smoothly among the surfaces of the film-like substrate.
  • the smooth surface can be the outer surface of the pressure-sensitive adhesive sheet, when the pressure-sensitive adhesive sheet having the smooth surface is used as, for example, a decorative sheet or a surface protective sheet, a better appearance (design) can be provided.
  • the arithmetic average surface roughness on the back surface of the film-like substrate is 1 ⁇ m or less (for example, about 0.05 to 0.75 ⁇ m, typically about 0 from the viewpoint of adhesive properties and appearance (design). .1 to 0.5 ⁇ m).
  • the arithmetic average surface roughness is measured using a general surface roughness measuring device (for example, a non-contact three-dimensional surface shape measuring device manufactured by Veeco, model “Wyko NT-3300”). be able to.
  • the back surface of the film-like substrate (the side opposite to the surface on which the adhesive layer is provided)
  • the surface may be subjected to a release treatment with a release treatment agent such as a silicone-based, long-chain alkyl-based, or fluorine-based material, if necessary.
  • a release treatment agent such as a silicone-based, long-chain alkyl-based, or fluorine-based material
  • the surface of the film-like base material on the pressure-sensitive adhesive layer side is subjected to a conventionally known surface treatment such as corona discharge treatment or application of a primer for the purpose of improving the adhesion between the base material and the pressure-sensitive adhesive layer. It may be given.
  • the thickness of the film-like substrate is not particularly limited and can be appropriately selected depending on the purpose. In general, the thickness is usually 1 ⁇ m or more (for example, about 2 to 500 ⁇ m), and 5 to 500 ⁇ m (for example, 10 to 200 ⁇ m, typically 15 to 100 ⁇ m). Is preferred. In a preferred embodiment, the thickness of the film-like substrate is about 30 ⁇ m or less, more preferably 12 ⁇ m or less, and even more preferably less than 10 ⁇ m (for example, less than 5 ⁇ m, typically less than 3 ⁇ m). Limiting the thickness of the film-like substrate is advantageous in terms of reducing the thickness, reducing the size, reducing the weight, and saving resources of the pressure-sensitive adhesive sheet.
  • the thickness of the foam-containing substrate (for example, the foam film substrate) can be appropriately set according to the strength, flexibility, purpose of use, etc. of the pressure-sensitive adhesive sheet. . From the viewpoint of impact absorption and the like, it is appropriate that the thickness of the foam-containing substrate is 30 ⁇ m or more, preferably 50 ⁇ m or more, more preferably 60 ⁇ m or more (for example, 80 ⁇ m or more). From the viewpoint of reducing the thickness of the pressure-sensitive adhesive sheet, reducing the size, reducing the weight, saving resources, and the like, it is usually appropriate to set the thickness of the foam-containing substrate to 1 mm or less.
  • the foam film disclosed herein By using the foam film disclosed herein, an excellent shock absorbing function can be exhibited even when the thickness is about 350 ⁇ m or less (more preferably 250 ⁇ m or less, for example, 180 ⁇ m or less).
  • the thickness of the foam film (which may be a foam layer) in the foam-containing substrate can also be preferably selected from the range exemplified as the thickness of the above-mentioned foam-containing substrate.
  • the pressure-sensitive adhesive layer disclosed herein typically exhibits a soft solid (viscoelastic body) state in a temperature range near room temperature, and is a material (pressure-sensitive adhesive) that has a property of easily adhering to an adherend by pressure. ).
  • the adhesive here is generally complex elastic modulus E * (1 Hz) as defined in “C. A. Dahlquist,“ Adhesion: Fundamental and Practice ”, McLaren & Sons, (1966) P. 143”. ⁇ 10 ⁇ 7 > dyne / cm ⁇ 2 > material (typically a material having the above properties at 25 [deg.] C.).
  • the pressure-sensitive adhesive layer disclosed herein is a known acrylic polymer, rubber polymer, polyester polymer, urethane polymer, polyether polymer, silicone polymer, polyamide polymer, fluorine polymer, etc. in the field of pressure sensitive adhesive. 1 type, or 2 types or more may be included as a base polymer. From the viewpoint of adhesive properties (for example, peel strength and repulsion resistance) and molecular design, an acrylic polymer can be preferably used. In other words, the pressure-sensitive adhesive layer is preferably an acrylic pressure-sensitive adhesive layer containing an acrylic polymer as a base polymer.
  • the “base polymer” of the pressure-sensitive adhesive refers to the main component of the polymer component contained in the pressure-sensitive adhesive (typically a component included in an amount exceeding 50% by weight).
  • the acrylic polymer for example, a polymer of a monomer raw material that includes alkyl (meth) acrylate as a main monomer and may further include a submonomer copolymerizable with the main monomer is preferable.
  • the main monomer means a component occupying more than 50% by weight of the monomer composition in the monomer raw material.
  • alkyl (meth) acrylate for example, a compound represented by the following formula (1) can be preferably used.
  • CH 2 C (R 1 ) COOR 2 (1)
  • R 1 in the above formula (1) is a hydrogen atom or a methyl group.
  • R 2 is a chain alkyl group having 1 to 20 carbon atoms (hereinafter, such a range of the number of carbon atoms may be represented as “C 1-20 ”).
  • an alkyl (meth) acrylate in which R 2 is a chain alkyl group of C 1-12 eg, C 2-10 , typically C 4-8 ) is preferable.
  • alkyl (meth) acrylate in which R 2 is a C 1-20 chain alkyl group can be used singly or in combination of two or more.
  • Preferred alkyl (meth) acrylates include n-butyl acrylate and 2-ethylhexyl acrylate.
  • the secondary monomer copolymerizable with the main monomer, alkyl (meth) acrylate can be useful for introducing a crosslinking point into the acrylic polymer or increasing the cohesive strength of the acrylic polymer.
  • a submonomer for example, one or two functional group-containing monomers such as a carboxy group-containing monomer, a hydroxyl group-containing monomer, an acid anhydride group-containing monomer, an amide group-containing monomer, an amino group-containing monomer, and a monomer having a nitrogen atom-containing ring The above can be used.
  • the secondary monomer may also be a vinyl ester monomer such as vinyl acetate, an aromatic vinyl compound such as styrene, a sulfonic acid group-containing monomer, a phosphoric acid group-containing monomer, and the like.
  • a vinyl ester monomer such as vinyl acetate, an aromatic vinyl compound such as styrene, a sulfonic acid group-containing monomer, a phosphoric acid group-containing monomer, and the like.
  • an acrylic polymer obtained by copolymerizing a carboxy group-containing monomer and a hydroxyl group-containing monomer as the submonomer is preferable.
  • the carboxy group-containing monomer include acrylic acid and methacrylic acid.
  • the hydroxyl group-containing monomer include 2-hydroxyethyl acrylate and 4-hydroxybutyl acrylate.
  • the amount of the submonomer is suitably 0.5% by weight or more, preferably 1% by weight or more, based on the total monomer components of the acrylic polymer. Further, the amount of the submonomer is suitably 30% by weight or less, preferably 10% by weight or less (for example, 5% by weight or less) in the total monomer components.
  • the content of the carboxy group-containing monomer is, among all monomer components used for the synthesis of the acrylic polymer, from the viewpoint of coexistence of adhesive force and cohesive force. It is preferably in the range of about 0.1 to 10% by weight (eg 0.2 to 8% by weight, typically 0.5 to 5% by weight).
  • the content of the hydroxyl group-containing monomer is approximately 0 out of all monomer components used for the synthesis of the acrylic polymer from the viewpoint of achieving both cohesion and cohesion. It is preferably within the range of 0.001 to 10% by weight (eg 0.01 to 5% by weight, typically 0.02 to 2% by weight). Further, when a vinyl ester monomer such as vinyl acetate is copolymerized as the submonomer, the content of the vinyl ester monomer is about 30% in the total monomer components used for the synthesis of the acrylic polymer. % Or less (typically 0.01 to 30% by weight, for example 0.1 to 10% by weight).
  • the method for obtaining the acrylic polymer is not particularly limited, and various polymerization methods known as synthetic methods for acrylic polymers, such as solution polymerization, emulsion polymerization, bulk polymerization, and suspension polymerization, are appropriately employed. be able to. Active energy ray irradiation polymerization performed by irradiation with UV or the like may be employed.
  • a monomer mixture is dissolved or dispersed in a suitable polymerization solvent (toluene, ethyl acetate, water, etc.), and a polymerization operation is performed using a polymerization initiator such as an azo polymerization initiator or a peroxide initiator.
  • a desired acrylic polymer can be obtained.
  • the weight average molecular weight (Mw) of the acrylic polymer disclosed herein is preferably in the range of 10 ⁇ 10 4 or more and 100 ⁇ 10 4 or less from the viewpoint of balancing the adhesive force and the cohesive force in a balanced manner.
  • Mw means the value of standard polystyrene conversion obtained by GPC (gel permeation chromatography).
  • the pressure-sensitive adhesive composition preferably contains a crosslinking agent from the viewpoint of increasing the cohesive force.
  • the type of the crosslinking agent is not particularly limited, and one or more conventionally known crosslinking agents can be appropriately selected and used.
  • Preferable examples of the crosslinking agent include isocyanate crosslinking agents and epoxy crosslinking agents.
  • the amount of the crosslinking agent used is not particularly limited, and is, for example, about 10 parts by weight or less (for example, about 0.005 to 10 parts by weight, preferably about 0.01 to 5 parts by weight) with respect to 100 parts by weight of the acrylic polymer. You can choose from a range.
  • the pressure-sensitive adhesive layer disclosed herein may have a composition containing a tackifier.
  • the tackifier is not particularly limited, for example, rosin tackifier resin, terpene tackifier resin, hydrocarbon tackifier resin, epoxy tackifier resin, polyamide tackifier resin, elastomer tackifier resin, Various tackifying resins such as a phenolic tackifying resin and a ketone tackifying resin can be used. Such tackifier resin can be used individually by 1 type or in combination of 2 or more types.
  • the softening point (softening temperature) of the tackifier resin is preferably about 60 ° C. or higher (preferably about 80 ° C. or higher, typically 100 ° C. or higher). Thereby, the adhesive sheet with higher adhesive force can be realized.
  • the upper limit of the softening point of the tackifying resin is not particularly limited, and can be about 180 ° C. or lower (for example, about 140 ° C. or lower).
  • the softening point of the tackifier resin here is defined as a value measured by a softening point test method (ring ball method) defined in any of JIS K5902: 2006 and JIS K2207: 2006.
  • the amount of the tackifier used is not particularly limited, and can be appropriately set according to the target tack performance (adhesive strength, etc.).
  • the tackifier is approximately 10 to 100 parts by weight (more preferably 20 to 80 parts by weight, more preferably 30 to 60 parts by weight) with respect to 100 parts by weight of the base polymer (preferably an acrylic polymer) based on the solid content. (Part by weight) is preferably used.
  • the pressure-sensitive adhesive composition may be a leveling agent, a crosslinking aid, a plasticizer, a softener, a filler, an antistatic agent, an anti-aging agent, an ultraviolet absorber, an antioxidant, a light stabilizer, etc., if necessary.
  • Various additives common in the field of pressure-sensitive adhesive compositions can be contained. About such various additives, a conventionally well-known thing should just be used by a conventional method.
  • the pressure-sensitive adhesive layer disclosed herein may be a pressure-sensitive adhesive layer formed from a water-based, solvent-type, hot-melt type, active energy ray-curable pressure-sensitive adhesive composition, or the like.
  • the water-based pressure-sensitive adhesive composition refers to a pressure-sensitive adhesive composition in a form containing a pressure-sensitive adhesive (pressure-sensitive adhesive layer forming component) in a water-based solvent (water-based solvent), and is typically dispersed in water.
  • a type pressure-sensitive adhesive composition a composition in which at least a part of the pressure-sensitive adhesive is dispersed in water
  • a solvent-type adhesive composition means the adhesive composition of the form which contains an adhesive in an organic solvent.
  • a water-based pressure-sensitive adhesive composition is preferable from the viewpoint of reducing environmental burden, and a solvent-type pressure-sensitive adhesive composition is preferably used from the viewpoint of adhesive properties and the like.
  • the pressure-sensitive adhesive layer disclosed herein can be formed by a conventionally known method.
  • a method of forming a pressure-sensitive adhesive layer on the surface by applying a pressure-sensitive adhesive composition to a peelable surface (peeling surface) and drying it, and transferring the pressure-sensitive adhesive layer to a substrate can be preferably employed.
  • a method (direct method) in which the pressure-sensitive adhesive layer is formed by directly applying (typically applying) the pressure-sensitive adhesive composition to the substrate and drying it may be employed.
  • the release surface the surface of the release liner, the back surface of the substrate after the release treatment, or the like can be used.
  • the adhesive composition for example, a gravure roll coater, a reverse roll coater, a kiss roll coater, a comma coater, a dip roll coater, a die coater, a bar coater, a knife coater, a spray coater or the like is used. Can be done.
  • the pressure-sensitive adhesive composition may be applied by impregnation or curtain coating. From the viewpoint of promoting the crosslinking reaction and improving the production efficiency, the pressure-sensitive adhesive composition is preferably dried under heating. The drying temperature can be, for example, about 40 to 150 ° C., and is usually preferably about 60 to 130 ° C. After drying the pressure-sensitive adhesive composition, it may be further aged for the purpose of adjusting component migration in the pressure-sensitive adhesive layer, progress of the crosslinking reaction, relaxation of strain that may exist in the base material or pressure-sensitive adhesive layer, etc. Good.
  • the thickness of the pressure-sensitive adhesive layer disclosed herein is not particularly limited and can be appropriately selected depending on the purpose. Usually, from the viewpoint of productivity such as drying efficiency and adhesive properties, it is appropriate to be about 0.5 to 200 ⁇ m, and about 2 to 200 ⁇ m (for example, 5 to 100 ⁇ m, typically 10 to 50 ⁇ m). It is preferable to do. In a preferred embodiment, the pressure-sensitive adhesive layer has a thickness of 20 ⁇ m or less, more preferably 10 ⁇ m or less, and even more preferably 7 ⁇ m or less (for example, 5 ⁇ m or less). According to the technique disclosed here, even if the thickness of the pressure-sensitive adhesive layer is limited as described above, good air escape properties can be obtained.
  • limiting the thickness of the pressure-sensitive adhesive layer is advantageous in terms of reducing the thickness of the pressure-sensitive adhesive sheet, reducing the size, reducing the weight, and saving resources.
  • the thickness of each pressure-sensitive adhesive layer may be the same or different.
  • the coat layer that partially covers the surface of the pressure-sensitive adhesive layer is not particularly limited as long as it can impart air bleedability.
  • a preferred example of the coating layer material is a resin material. From the viewpoint of appearance, a coat layer formed from a transparent or translucent resin material is preferable.
  • the resin material that can constitute the coating layer examples include polyurethane resins, phenol resins, epoxy resins, polyamide resins, urea melamine resins, silicone resins, polysilazane resins, fluorine resins, phenoxy resins, methacrylic resins.
  • vinyl, polyvinylidene chloride, polycarbonate, celluloses, polyacetal and the like examples of these resins may be one type or two or more types of resins selected from various types of resins such as thermosetting resins, ultraviolet curable resins, electron beam curable resins, and two-component mixed resins.
  • the coating layer disclosed herein includes a filler, an antioxidant, an antioxidant, an ultraviolet absorber, a crosslinking agent, a lubricant, a colorant (pigment, dye, etc.), an antistatic agent, a fluidity modifier (thixotropic agent, Various additives such as thickeners and film-forming aids may be included as necessary.
  • the coat layer is typically non-tacky or weakly tacky. Thereby, good air escape properties are preferably realized.
  • that the coating layer is non-tacky or weakly tacky means that the 180 ° peel strength of the coating layer is less than 3 N / 25 mm (typically less than 1 N / 25 mm, and the adhesive force is too low to be measured. Including the case.)
  • the 180 degree peel strength of the coat layer is measured by the following method. That is, for a measurement sample obtained by cutting a pressure-sensitive adhesive sheet having a coating layer on the entire surface of the pressure-sensitive adhesive layer into a size of 25 mm in width and 100 mm in length, the coating layer of the measurement sample is used at 23 ° C.
  • the method for disposing the coat layer on the surface of the pressure-sensitive adhesive layer is not particularly limited, but typically, the following method is employed.
  • the composition for forming a coat layer is prepared by dissolving or dispersing in a suitable solvent as necessary.
  • the composition is also referred to as a peelable support (also referred to as “coat layer transfer film”, typically a release liner). Apply to the surface and cure.
  • the peelable support body surface in which the coating layer was formed is contact
  • a desired coat layer pattern such as a grid pattern can be preferably formed by employing a method such as offset printing, silk screen printing, letterpress printing, flexographic printing, gravure printing, or ink jet printing. From the viewpoint of air escape, gravure printing is more preferable.
  • the same structure as described above can be obtained by further forming an adhesive layer on the peelable surface on which the coating layer is formed as described above so as to cover the coating layer. In this case, the formed pressure-sensitive adhesive layer is then transferred to the surface of the film-like substrate.
  • a person skilled in the art adopts the method as described above, selects a coat layer material in consideration of the wettability of the peelable support to the peelable surface based on the common general knowledge in this technical field, and forms the coat layer.
  • the coating layer having the cross-sectional shape disclosed herein can be formed by adjusting the viscosity of the composition for use to an appropriate range and further selecting, for example, an appropriate printing means.
  • the thickness of the coat layer is set to be less than 3 ⁇ m as described above. From the viewpoint of achieving both air bleedability and appearance, the thickness of the pressure-sensitive adhesive layer is less than half (for example, 1/3 or less, typically Is preferably 1/5 or less. Specifically, the thickness of the coat layer is preferably set to 0.1 ⁇ m or more (for example, 0.5 ⁇ m or more, typically 1 ⁇ m or more) from the viewpoints of air release properties, productivity, and the like.
  • the technique disclosed here is preferably implemented in the form of a pressure-sensitive adhesive sheet with a release liner provided with a release liner that protects the adhesive surface of the pressure-sensitive adhesive sheet.
  • a conventional release paper or the like can be used as the release liner, and is not particularly limited.
  • a low-adhesiveness of a release liner having a release treatment layer on the surface of a liner substrate such as a resin film such as PET or paper, or a fluorine-based polymer (polytetrafluoroethylene, etc.) or a polyolefin resin (PE, PP, etc.)
  • a release liner made of a material can be used.
  • the release treatment layer may be formed, for example, by surface-treating the liner base material with a release treatment agent such as silicone-based, long-chain alkyl-based, fluorine-based, or molybdenum sulfide.
  • the peelable surface (the surface in contact with the adhesive surface of the pressure-sensitive adhesive sheet) of the release liner (release film) is formed smoothly.
  • a coat layer is partially formed on the peelable surface of such a release liner, and the surface of the pressure-sensitive adhesive layer is brought into contact with the surface of the release liner on which the coat layer is partially formed so that the coat layer is the surface of the pressure-sensitive adhesive layer.
  • the release liner also serves as a coat layer transfer film (release film)
  • a coat layer is partially formed on the peelable surface of the release liner as described above, and an adhesive layer is further formed on the peelable surface on which the coat layer is formed so as to cover the coat layer.
  • the formed pressure-sensitive adhesive layer is transferred to the surface of the film-like substrate.
  • the arithmetic average surface roughness of the release surface of the release liner is 1 ⁇ m or less (eg, about 0.05 to 0.75 ⁇ m, typically about 0.1 to 0.5 ⁇ m). Is preferred.
  • the release liner used for the production of the pressure-sensitive adhesive sheet disclosed herein may be a release liner 110 with a coat layer including a peelable support 120 having a peelable surface 120A as shown in FIG.
  • the peelable support 120 may have a release treatment layer on at least one surface of the liner substrate, or may be a support made of a low adhesive material.
  • a coat layer 30 that can be transferred to an adhesive sheet is provided on the peelable surface 120A of the peelable support 120. That is, the coat layer 30 is disposed on the peelable surface 120A in a state where it can be separated by the adhesive force of the pressure-sensitive adhesive.
  • the configuration (shape, arrangement state, arrangement relationship, size, pattern, etc.) of the coat layer provided on the peelable surface of the peelable support is basically the same as the configuration of the coat layer on the adhesive surface of the adhesive sheet described above. Since there is, explanation is omitted. Also, the linearly extending portion of the coat layer provided on the release liner is basically the same except that the first surface is located on the peelable surface side and the second surface constitutes the outer surface on the peelable surface. The description is omitted because it is as described above.
  • the thickness (total thickness) of the release liner is not particularly limited, but is preferably about 10 to 500 ⁇ m (for example, 15 to 100 ⁇ m) from the viewpoints of release workability, handleability, strength, and the like.
  • the pressure-sensitive adhesive sheet disclosed herein can efficiently prevent generation of bubbles and the like between the adherend and the adherend. Therefore, in any pasting method of manual pasting (hand pasting) or pasting (automatic pasting) using an automatic pasting machine or the like, the pasting property is improved. For example, in the case of pasting by hand, the dependence on the individual skill can be reduced, so that advantages such as improvement and stabilization of pasting efficiency and pasting quality can be obtained. In addition, when pasting by automatic pasting, it is possible to realize a reduction in pasting failure such as mixing of bubbles and a reduction in pasting work.
  • bubbles may be generated between the pressure-sensitive adhesive sheet and the adherend not only at the time of pasting but also as time passes after pasting.
  • a relatively high temperature eg, 35 ° C. or higher
  • the above-mentioned bubbles and the like are generated between the adhesive sheet and the adherend.
  • the appearance may be deteriorated.
  • the inside of a factory in summer, the outdoors, the inside of an electronic device, and the like are likely to be in a high temperature state as described above. According to the technology disclosed herein, generation of bubbles and the like can be prevented even when used in applications exposed to the high temperature environment as described above.
  • the pressure-sensitive adhesive sheet disclosed herein can be preferably used for applications to be applied to the surface of various articles by taking advantage of the characteristics described above.
  • it can be used as various decorative sheets, surface protective sheets, fixing sheets for printing plates such as flexographic printing, light shielding sheets, and the like.
  • a decorative sheet typically a paint substitute sheet
  • it is used for the purpose of, for example, improving the smoothness of the outer surface of the chassis and covering non-uniform portions such as screw holes on the surfaces of various members in an electronic device such as a display (typically a television display).
  • a covering sheet By using such a covering sheet, it is possible to reduce the appearance unevenness on the outer surface of the adherend and make the dimensional accuracy uniform.
  • it can be preferably used as an exterior sheet of a battery pack in which appearance is important.
  • the pressure-sensitive adhesive sheet disclosed herein is configured to be thin, it is possible to maintain good pressure-sensitive adhesive properties while preventing deterioration of the appearance quality after pasting. Therefore, it can be preferably applied to applications (for example, portable electronic devices) where reduction in thickness and weight is required and resource saving is desired.
  • applications for example, portable electronic devices
  • mobile phones, smartphones, tablet computers, notebook computers, various wearable devices for example, wrist wear devices that can be worn on the wrist like wristwatches, modular devices that can be worn on parts of the body using clips, straps, etc.
  • Eyewear type including glasses type (monocular type and binocular type, including head mount type), clothing type attached to shirts, socks, hats, etc., for example in the form of accessories, earwear type attached to ears like earphones Etc.), digital cameras, digital video cameras, audio equipment (portable music players, IC recorders, etc.), calculators (calculators, etc.), portable game machines, electronic dictionaries, electronic notebooks, electronic books, in-vehicle information equipment, portable radios, mobile phones Surface protective sheet for portable electronic devices such as TVs, portable printers, portable scanners, portable modems, etc.
  • the pressure-sensitive adhesive sheet may have a frame shape (frame shape), a band shape (strip shape), or the like depending on the purpose or the like.
  • “portable” means that it is not sufficient to be able to carry it alone, but to have a portability that allows an individual (standard adult) to carry it relatively easily. Shall mean.
  • a pressure-sensitive adhesive sheet for a portable electronic device comprising a film-shaped substrate and a pressure-sensitive adhesive layer provided on at least one surface of the film-shaped substrate, A coating layer partially covering the surface of the pressure-sensitive adhesive layer;
  • the pressure-sensitive adhesive sheet wherein the coat layer has a thickness of less than 3 ⁇ m.
  • the pressure-sensitive adhesive sheet according to (1) wherein the pressure-sensitive adhesive layer has a thickness of 20 ⁇ m or less.
  • the 1st adhesive layer provided on the 1st surface of the said film-like base material, and the 2nd adhesive layer provided on the 2nd surface of the said film-like base material With The pressure-sensitive adhesive sheet according to any one of (1) to (3), wherein the coating layer is partially disposed on a surface of at least one pressure-sensitive adhesive layer of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer. . (5) The pressure-sensitive adhesive sheet according to any one of (1) to (4), wherein the film-like substrate has a thickness of less than 5 ⁇ m. (6) The pressure-sensitive adhesive sheet according to (5), wherein the total thickness is 50 ⁇ m or less.
  • the pressure-sensitive adhesive layer contains an acrylic polymer in a proportion exceeding 50% by weight of the polymer component contained in the pressure-sensitive adhesive layer,
  • R 1 is a hydrogen atom or a methyl group.
  • R 2 is a chain alkyl group having 1 to 20 carbon atoms.
  • the acrylic polymer is an acrylic polymer obtained by copolymerizing at least one submonomer selected from the group consisting of acrylic acid, methacrylic acid, 2-hydroxyethyl acrylate, and 4-hydroxybutyl acrylate.
  • the acryl-based polymer is copolymerized with a carboxy group-containing monomer, and the copolymerization ratio of the carboxy-group-containing monomer is 0.1 to 0.1% among all monomer components used for the synthesis of the acryl-based polymer.
  • the pressure-sensitive adhesive sheet according to any one of (7) to (10), wherein the pressure-sensitive adhesive sheet is 10% by weight.
  • the acrylic polymer is copolymerized with a hydroxyl group-containing monomer, The pressure-sensitive adhesive sheet according to any one of the above (7) to (11), wherein the copolymerization ratio of the hydroxyl group-containing monomer is 0.001 to 10% by weight in the total monomer components used for the synthesis of the acrylic polymer. .
  • the pressure-sensitive adhesive sheet according to any one of (7) to (12), wherein the pressure-sensitive adhesive layer contains an isocyanate-based crosslinking agent and / or an epoxy-based crosslinking agent.
  • the pressure-sensitive adhesive layer contains a tackifying resin having a softening point of 100 ° C. to 140 ° C. in a ratio of 30 to 60 parts by weight with respect to 100 parts by weight of the acrylic polymer,
  • the tackifier resin is at least one selected from the group consisting of a rosin tackifier resin, a terpene tackifier resin, and a hydrocarbon tackifier resin, according to any one of the above (7) to (13).
  • Adhesive sheet is at least one selected from the group consisting of a rosin tackifier resin, a terpene tackifier resin, and a hydrocarbon tackifier resin, according to any one of the above (7) to (13).
  • the coating layer is made of polyurethane resin, phenol resin, epoxy resin, polyamide resin, urea melamine resin, silicone resin, polysilazane resin, fluorine resin, phenoxy resin, methacrylic resin, acrylic resin.
  • the film-like substrate is a polyolefin resin film, a polyester resin film, a vinyl chloride resin film, a vinyl acetate resin film, a polyimide resin film, a polyamide resin film, a fluorine resin film, or a cellophane film.
  • the adhesive surface of the pressure-sensitive adhesive sheet is composed of the pressure-sensitive adhesive layer and the coat layer,
  • the coat layer has a portion extending linearly from one end of the adhesive surface to the other end,
  • the linearly extending portion has a first surface constituting an adhesive surface of the pressure-sensitive adhesive sheet, and a second surface located on the pressure-sensitive adhesive layer side with respect to the first surface,
  • the second surface of the linearly extending portion is configured by a gentle curve as a whole in a cross section perpendicular to the longitudinal direction of the linearly extending portion, according to any one of (1) to (25) above
  • the adhesive sheet as described.
  • the second surface of the linearly extending portion has a gentle curve in the cross section perpendicular to the longitudinal direction of the linearly extending portion, starting from one end of the linearly extending portion toward the center.
  • the second surface of the linearly extending portion has an inclination extending in the depth direction of the pressure-sensitive adhesive layer from one end of the linearly extending portion in a cross section orthogonal to the longitudinal direction of the linearly extending portion.
  • the pressure-sensitive adhesive sheet according to the above (26) or (27) having a portion and a flat portion including the deepest portion of the linearly extending portion and substantially parallel to the adhesive surface.
  • the pressure-sensitive adhesive layer surface has a coat layer arrangement part and a coat layer non-arrangement part, The pressure-sensitive adhesive sheet according to any one of the above (1) to (31), wherein the area ratio of the coating layer non-arranged portion on the surface of the pressure-sensitive adhesive layer is 70% or more.
  • On the surface of the pressure-sensitive adhesive layer a plurality of linearly extending portions are arranged, Among the plurality of linearly extending portions, the plurality of linearly extending portions constituting a group are arranged at intervals in the width direction, whereby the coat layer arranging portion has a stripe pattern.
  • the coat layer arrangement portion includes a first stripe pattern portion and a second stripe pattern portion arranged to intersect the first stripe pattern portion, whereby the coat layer arrangement is performed.
  • the interval between a plurality of linearly extending portions constituting one stripe pattern is in the range of 1.0 to 10 mm, according to (34) or (35) above Adhesive sheet.
  • the pressure-sensitive adhesive sheet according to any one of the above (32) to (36), wherein the adhesive surface on which the coat layer is partially disposed exhibits a 180-degree peel strength after 24 hours of 13 N / 25 mm or more.
  • a pressure-sensitive adhesive sheet with a release liner comprising the pressure-sensitive adhesive sheet according to any one of (1) to (37) above and a release liner that protects the adhesive surface of the pressure-sensitive adhesive sheet.
  • a release liner for a pressure-sensitive adhesive sheet comprising a peelable support in which at least one surface is a peelable surface, A release liner, which is provided with a coat layer that can be transferred to an adhesive sheet on the peelable surface of the peelable support.
  • the coat layer has a portion extending linearly from one end of the peelable surface toward the other end,
  • the linearly extending portion has a first surface located on the peelable surface side and a second surface constituting an outer surface on the peelable surface,
  • the release liner according to (40), wherein the second surface of the linearly extending portion is configured by a gentle curve as a whole in a cross section perpendicular to the longitudinal direction of the linearly extending portion.
  • the release liner according to (40) or (41) wherein the coat layer has a thickness of less than 3 ⁇ m.
  • the above (1) to (37), comprising the steps of forming a pressure-sensitive adhesive layer on the peelable surface of the peelable support and transferring the pressure-sensitive adhesive layer to the surface of the film-like substrate.
  • a method for producing the pressure-sensitive adhesive sheet according to any one of A coat layer is partially formed on the peelable surface of the peelable support, and the step of forming the pressure-sensitive adhesive layer includes the step of forming the pressure-sensitive adhesive layer on the peelable surface on which the coat layer is formed. Or a coating layer is not formed on the peelable surface of the peelable support, and after the step of transferring the pressure-sensitive adhesive layer, the peelable support is removed from the pressure-sensitive adhesive.
  • a coat layer-forming peelable support having a coat layer partially formed on the peelable surface is prepared, and the coat layer-forming peelable support is transferred to the adhesive surface of the pressure-sensitive adhesive sheet.
  • a method for producing the adhesive layer (45) a step of partially forming a coat layer on the peelable surface of the peelable support; Further forming a pressure-sensitive adhesive layer on the peelable surface on which the coating layer is formed; Transferring the pressure-sensitive adhesive layer to the surface of the film-like substrate;
  • Example 1> (Preparation of adhesive composition)
  • a reaction vessel equipped with a stirrer, thermometer, nitrogen gas inlet tube, reflux condenser, and dropping funnel 70 parts of n-butyl acrylate, 30 parts of 2-ethylhexyl acrylate, 3 parts of acrylic acid, and 4-hydroxybutyl acrylate 0.05 part, 0.08 part of azobisisobutyronitrile as a polymerization initiator, and toluene as a polymerization solvent were charged, and solution polymerization was performed at 60 ° C. for 6 hours to obtain a toluene solution of an acrylic polymer (viscosity 28 Pa ⁇ s, 40% solids).
  • Mw of the obtained acrylic polymer was about 440,000.
  • 30 parts of polymerized rosin pentaerythritol ester made by Arakawa Chemical Industries, trade name “Pencel D-125”, softening point 125 ° C.
  • an isocyanate-based crosslinking agent trade name “Coronate L”, manufactured by Nippon Polyurethane Industry Co., Ltd.
  • a coat layer forming material (urethane-based: two-component mixed curable ink) was applied to the peelable surface of a 75 ⁇ m-thick release film (trade name “FMN-75WD (C1-CA1)” manufactured by Fujiko) by gravure printing. Then, a coat layer (coating thickness of about 1.5 ⁇ m, transparent) having a lattice pattern was formed. Thus, the coating layer formation peeling film in which the coating layer was partially formed in the peelable surface was obtained.
  • a coat layer forming material (urethane-based: two-component mixed curable ink) was applied to the peelable surface of a 75 ⁇ m-thick release film (trade name “FMN-75WD (C1-CA1)” manufactured by Fujiko) by gravure printing. Then, a coat layer (coating thickness of about 1.5 ⁇ m, transparent) having a lattice pattern was formed. Thus, the coating layer formation peeling film in which the coating layer was partially formed in the peelable surface was obtained.
  • the above-mentioned pressure-sensitive adhesive composition is applied to the peelable surface of the coat layer-forming peelable film obtained above using a comma coater, dried so that the final thickness is 4 ⁇ m, and supported on the peelable film.
  • a pressure-sensitive adhesive layer in the form was obtained.
  • a 2 ⁇ m thick PET film substrate (trade name “Lumirror SDC61”, manufactured by Toray Industries, Inc.) is prepared, and the pressure-sensitive adhesive layer obtained above is applied to the first surface (corona discharge treated surface) of this PET substrate. The film was transferred while supported on the release film. The release film was used for protecting the pressure-sensitive adhesive layer surface as it was.
  • the pressure-sensitive adhesive composition was applied to the release-treated surface of a 38 ⁇ m-thick release film (trade name “Diafoil MRF38”, manufactured by Mitsubishi Plastics) so that the final thickness was 4 ⁇ m, and dried.
  • a pressure-sensitive adhesive layer in a form supported by a release film was obtained.
  • the adhesive layer obtained above was transcribe
  • the release film was used for protecting the pressure-sensitive adhesive layer surface as it was.
  • a coat layer-forming pressure-sensitive adhesive layer is disposed on the first surface of the PET base material, and a non-coat layer-forming pressure-sensitive adhesive layer is provided on the other side.
  • a double-sided PSA sheet with a substrate was prepared.
  • One adhesive surface of this pressure-sensitive adhesive sheet is a coat layer-forming adhesive surface on which a lattice pattern composed of the coat layer shown in FIG.
  • the width (line width) of the belt-like portion of the coat layer is about 0.2 mm
  • the interval between the strip portions was about 1.8 mm
  • the pitch of the strip portions was about 2 mm
  • the area ratio of the coat layer on the adhesive surface of the pressure-sensitive adhesive sheet was 19%.
  • the other adhesive surface of the pressure-sensitive adhesive sheet is a coating layer non-formed adhesive surface.
  • Example 2 and Example 3 A pressure-sensitive adhesive sheet according to each example was prepared in the same manner as in Example 1 except that the thickness of the coat layer and the thickness of the pressure-sensitive adhesive layer were changed to the values shown in Table 1.
  • Example 4 and Example 5 In the production of the pressure-sensitive adhesive sheet, the pressure-sensitive adhesive layer with no coat layer formed on both sides was transferred to a PET substrate, and then the release film on one pressure-sensitive adhesive layer side was removed, and the coat layer-formed release film was bonded. Others were the same as in Examples 1 and 2, and double-sided PSA sheets with base materials according to Examples 4 and 5 were produced.
  • the coating layer-forming pressure-sensitive adhesive layer is disposed on the first surface of the PET base material, and the coating layer non-forming pressure-sensitive adhesive layer is disposed on the other surface.
  • Example 6 A pressure-sensitive adhesive sheet according to this example was produced in the same manner as in Example 4 except that the thickness of the coat layer was changed to the value shown in Table 1.
  • Example 7 The pressure-sensitive adhesive sheet was prepared in the same manner as in Example 3 except that the thickness of the coat layer was changed to 4 ⁇ m. The pressure-sensitive adhesive sheet could not be produced.
  • Example 8 and Example 9 Except not having formed the coat layer, it carried out similarly to Examples 1 and 3, and produced the adhesive sheet which concerns on Examples 8 and 9, respectively. In these examples, a release film without a coat layer was not used and only a release film without a coat layer was used.
  • One adhesive surface (non-coating layer-formed adhesive surface) of the double-sided PSA sheet according to each example was exposed, lined with a PET film having a thickness of 25 ⁇ m, and cut into a 50 mm ⁇ 50 mm square shape to prepare a measurement sample.
  • the other adhesion surface of this measurement sample (for example 1 to 7, the coating layer forming adhesion surface) is exposed, and the other adhesion surface is placed on a stainless steel plate (SUS plate) as an adherend placed horizontally.
  • the measurement sample was placed so that the surface was on the adherend side (no crimping).
  • a bubble forming rubber plate is prepared, and this is placed on the measurement sample and pressed, so that bubbles are formed between the adhesion surface (coating layer formation adhesion surface) of the measurement sample and the adherend surface. Formed. Specifically, a rubber plate having a square shape of 50 mm ⁇ 50 mm and a square opening (through hole) of 20 mm ⁇ 20 mm at the center of the surface was prepared as a bubble forming rubber plate.
  • This bubble forming rubber plate is overlaid on the upper surface (backing surface) of the measurement sample, and pressed from above on the condition of 3 kgf for 5 seconds, and the adhesion surface of the measurement sample at the portion corresponding to the frame shape of the rubber plate ( For Examples 1 to 7, the adhesion surface of the coating layer) and the adherend surface are pressure-bonded, and the adhesion surface (Example 1) of the measurement sample in the non-load area (20 mm ⁇ 20 mm square area) corresponding to the opening of the rubber plate For ⁇ 7, bubbles were formed between the coating layer forming adhesive surface) and the adherend surface.
  • the bubble forming rubber plate on the backing surface of the measurement sample is removed, and a 50 mm ⁇ 50 mm square rubber plate (no opening) is overlaid on the backing surface of the measurement sample, and 3 kgf, Pressing was performed for 15 seconds.
  • the rubber plate was removed, and the pre-formed bubbles were visually confirmed.
  • the trade name “NEO-200” (thickness: 3 mm) manufactured by Irumagawa Rubber Co., Ltd. was used, and as the rubber plate for forming bubbles, a processed rubber plate of the same type was used.
  • Adhesive strength expression rate surface state of adhesive surface
  • the other adhesion surface of this measurement sample (for example 1 to 7, the coating layer forming adhesion surface) is exposed, and the exposed adhesion surface of the measurement sample is a stainless steel plate (SUS plate) in an environment of 23 ° C. and 50% RH. ) Was reciprocated once to a surface of 5) and pressed.
  • SUS plate stainless steel plate
  • the peel strength (N / 20 mm) was measured using a universal tensile compression tester under the conditions of a tensile speed of 300 mm / min and a peel angle of 180 degrees according to JIS Z 0237: 2000. Measured (adhesive strength after 24 hours). (Area ratio of 100% of the adhesive in the adhesive surface adhesive layer, area percentage of 0% of the coating layer) coating layer non-forming pressure-sensitive adhesive sheet for each example as 100% reference peel strength P C of the pressure-sensitive adhesive sheet according to each example The area ratio of the coat layer on the adhesive surface was subtracted, and the theoretical peel strength (theoretical value) P T (N / 20 mm) of the pressure-sensitive adhesive sheet according to each example was determined.
  • the pressure-sensitive adhesive (P M ⁇ P T ⁇ 0.9) It can be evaluated that the coating layer formed on the surface of the layer is well adapted to the pressure-sensitive adhesive layer, the surface state of the adhesive surface of the pressure-sensitive adhesive sheet (coating layer forming adhesive surface) is good, and a value close to the theoretical value is realized. In other words, it is determined that the case satisfying the P M ⁇ P T ⁇ 0.9 "pass", was judged as "fail” If you did not meet the P M ⁇ P T ⁇ 0.9.
  • the outline and evaluation results of the pressure-sensitive adhesive sheet according to each example are shown in Table 1.
  • Table 1 in Examples 1 to 6, a good air escape property was obtained by disposing a coat layer as an air escape means on the surface of the pressure-sensitive adhesive layer.
  • Examples 8 and 9 in which no coating layer was provided, the bubbles were not removed and the evaluation of the air releasing property was unacceptable.
  • the thickness tolerance of the pressure-sensitive adhesive sheet is within 50% or less, whereas the pressure-sensitive adhesive of Example 6 having a coating layer having a thickness of more than 3 ⁇ m. The thickness tolerance of the sheet exceeded 50%.
  • Example 6 the adhesive force expression rate was low compared with Examples 1-5. This result suggests that the pressure-sensitive adhesive sheet adhesive surface composed of the pressure-sensitive adhesive and the coat layer was easy to adjust to the adherend due to the thin coating layer.
  • Adhesive sheet 1A Adhesive surface 10 Film-like base material 20,21,22 Adhesive layer 20A Adhesive layer surface 30 Coat layer 40 Coat layer pattern (lattice pattern) 42 1st stripe-shaped pattern part 44 2nd stripe-like pattern part 50 The part (band-like part) extended linearly 52 1st surface 54 2nd surface 56 One end (left end) of the width direction of the part extended linearly 58 The other end in the width direction of the linearly extending part (right end) 60 Inclined portion 62 Flat portion 70 Coat layer placement portion 72 Coat layer non-placement portion 100, 101, 102 Release liner 110 Release liner with coat layer 120 Release support 120A Release surface

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)

Abstract

L'invention concerne une feuille adhésive qui est utilisée pour des dispositifs électroniques portables et qui est susceptible d'obtenir d'excellentes propriétés de libération d'air. Selon la présente invention, l'invention concerne une feuille adhésive pour des dispositifs électroniques portables. La feuille adhésive est dotée de : un matériau de base de type film ; et une couche adhésive qui est disposée sur au moins une surface du matériau de base de type film. L'épaisseur de la couche adhésive n'est pas supérieure à 20 µm. Une couche de revêtement qui recouvre partiellement la surface de la couche adhésive est en outre prévue. En outre, l'épaisseur de la couche de revêtement est inférieure à 3 µm.
PCT/JP2015/083443 2014-11-28 2015-11-27 Feuille adhésive pour dispositifs électroniques portables WO2016084946A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201580064283.9A CN107001870B (zh) 2014-11-28 2015-11-27 便携式电子设备用粘合片
US15/529,560 US10596792B2 (en) 2014-11-28 2015-11-27 Pressure-sensitive adhesive sheet for mobile electronics
KR1020177011803A KR102506412B1 (ko) 2014-11-28 2015-11-27 휴대 전자기기용 점착 시트

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JP2014-242183 2014-11-28
JP2014242183 2014-11-28
JP2015164268A JP6664166B2 (ja) 2014-11-28 2015-08-21 携帯電子機器用粘着シート
JP2015-164268 2015-08-21

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JP2017200968A (ja) * 2016-05-02 2017-11-09 日東電工株式会社 剥離ライナー付き粘着シート

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JP2000044903A (ja) * 1998-08-03 2000-02-15 Toyo Ink Mfg Co Ltd 粘着シート、その製造方法、およびその粘着力の調整方法
JP2000109763A (ja) * 1998-10-01 2000-04-18 Konishi Co Ltd はく離紙を有する加工粘着テープとその製造方法
JP2000160117A (ja) * 1998-09-21 2000-06-13 Toyo Ink Mfg Co Ltd 両面粘着シ―ト、その製造方法、およびその粘着力の調整方法
JP2001234130A (ja) * 2000-02-25 2001-08-28 Kuramoto Sangyo:Kk 粘着シートおよびその製造方法
JP2003531253A (ja) * 2000-04-24 2003-10-21 エーブリー デニソン コーポレイション 脱気が改善された接着物およびその接着物を製作する方法
JP2005298543A (ja) * 2004-04-06 2005-10-27 Kansai Paint Co Ltd 粘着シート
JP2010138260A (ja) * 2008-12-11 2010-06-24 Union Chemicar Co Ltd 粘着層、透明粘着層を用いた機能性透明シートおよびインクジェット記録用透明シート
JP2014019799A (ja) * 2012-07-19 2014-02-03 Nitto Denko Corp 粘着シート、電子機器部材積層体及び光学部材積層体
JP2014105262A (ja) * 2012-11-27 2014-06-09 Nippon Shokubai Co Ltd 両面粘着テープ

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Publication number Priority date Publication date Assignee Title
JPH04144798A (ja) * 1990-10-05 1992-05-19 Hideo Hamada 転写シート
JP2000044903A (ja) * 1998-08-03 2000-02-15 Toyo Ink Mfg Co Ltd 粘着シート、その製造方法、およびその粘着力の調整方法
JP2000160117A (ja) * 1998-09-21 2000-06-13 Toyo Ink Mfg Co Ltd 両面粘着シ―ト、その製造方法、およびその粘着力の調整方法
JP2000109763A (ja) * 1998-10-01 2000-04-18 Konishi Co Ltd はく離紙を有する加工粘着テープとその製造方法
JP2001234130A (ja) * 2000-02-25 2001-08-28 Kuramoto Sangyo:Kk 粘着シートおよびその製造方法
JP2003531253A (ja) * 2000-04-24 2003-10-21 エーブリー デニソン コーポレイション 脱気が改善された接着物およびその接着物を製作する方法
JP2005298543A (ja) * 2004-04-06 2005-10-27 Kansai Paint Co Ltd 粘着シート
JP2010138260A (ja) * 2008-12-11 2010-06-24 Union Chemicar Co Ltd 粘着層、透明粘着層を用いた機能性透明シートおよびインクジェット記録用透明シート
JP2014019799A (ja) * 2012-07-19 2014-02-03 Nitto Denko Corp 粘着シート、電子機器部材積層体及び光学部材積層体
JP2014105262A (ja) * 2012-11-27 2014-06-09 Nippon Shokubai Co Ltd 両面粘着テープ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017200968A (ja) * 2016-05-02 2017-11-09 日東電工株式会社 剥離ライナー付き粘着シート
WO2017191734A1 (fr) * 2016-05-02 2017-11-09 日東電工株式会社 Feuille adhésive dotée d'une couche anti-adhérente
US11104826B2 (en) 2016-05-02 2021-08-31 Nitto Denko Corporation Release-linered pressure-sensitive adhesive sheet

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