WO2017109883A1 - 両面粘着テープ - Google Patents

両面粘着テープ Download PDF

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Publication number
WO2017109883A1
WO2017109883A1 PCT/JP2015/085972 JP2015085972W WO2017109883A1 WO 2017109883 A1 WO2017109883 A1 WO 2017109883A1 JP 2015085972 W JP2015085972 W JP 2015085972W WO 2017109883 A1 WO2017109883 A1 WO 2017109883A1
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Prior art keywords
layer
sensitive adhesive
adhesive tape
double
pressure
Prior art date
Application number
PCT/JP2015/085972
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English (en)
French (fr)
Japanese (ja)
Inventor
武夫 小井沼
佐知男 中西
貴志 布施
大地 草野
Original Assignee
株式会社寺岡製作所
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Application filed by 株式会社寺岡製作所 filed Critical 株式会社寺岡製作所
Priority to PCT/JP2015/085972 priority Critical patent/WO2017109883A1/ja
Priority to JP2017557576A priority patent/JP6526240B2/ja
Priority to KR1020187020302A priority patent/KR102162899B1/ko
Priority to CN201580085433.4A priority patent/CN108368389B/zh
Priority to TW105142970A priority patent/TWI738698B/zh
Publication of WO2017109883A1 publication Critical patent/WO2017109883A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • 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
    • C09J7/29—Laminated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • 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
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays

Definitions

  • the present invention is a double-sided surface having both light-reflecting and light-shielding functions, useful for improving the brightness of a backlight surface for a liquid crystal display device used in, for example, a mobile phone, a touch panel, and the like and preventing visibility from being deteriorated due to light leakage. It relates to an adhesive tape.
  • a double-sided adhesive tape is provided between the liquid crystal display unit and the backlight unit, thereby fixing both members.
  • This double-sided pressure-sensitive adhesive tape has, for example, a white light reflection layer and a black light-shielding layer, and contributes to improving the luminance of the backlight surface and preventing the visibility from being lowered due to light leakage from the backlight.
  • Such double-sided pressure-sensitive adhesive tapes that contribute to both improvement in luminance and light shielding properties are disclosed in, for example, Patent Documents 1 to 4.
  • the light reflecting layer of the double-sided pressure-sensitive adhesive tape of Patent Document 1 is composed of a biaxially stretched resin film of a polyester resin containing a white colorant.
  • a light reflecting layer made of a resin film containing such a colorant is inferior in productivity and relatively difficult to adjust brightness (reflectance).
  • the light reflecting layer of the double-sided pressure-sensitive adhesive tape of Patent Document 2 is a white printing layer, and the light shielding layer is a black printing layer.
  • the printed layer is excellent in productivity as compared with a resin film containing a colorant, and lightness (reflectance) can be easily adjusted.
  • the laminated base material used for this double-sided pressure-sensitive adhesive tape has a laminated structure of black printing layer / resin film / white printing layer, when the laminated base material is rolled up, the printed layers come into contact with each other and block. Will occur. Therefore, it is necessary to provide an anti-blocking film (thin coat layer) on the outside of one printed layer.
  • the lamination base material of patent document 2 has a printing layer on both surfaces, when drawing out a lamination base material at the coating process of an adhesive, a printing layer contacts a guide roll and it is easy to lose
  • the printed layer may be peeled off.
  • a laminated base material provided with a light shielding layer (black print layer) on one side of a resin film is used.
  • a polyurethane resin having a Tg (tan ⁇ peak temperature) of ⁇ 30 ° C. to 30 ° C. is used as the binder resin of the light shielding layer (black printing layer), and an aliphatic or alicyclic isocyanate is used as the curing agent.
  • Tg titanium ⁇ peak temperature
  • an aliphatic or alicyclic isocyanate is used as the curing agent.
  • JP 2004-156015 A JP 2011-95764 A JP 2009-197124 A JP 2010-53240 A
  • An object of the present invention is a double-sided pressure-sensitive adhesive tape having both functions of light reflectivity and light-shielding property, and it is difficult for blocking and wrinkle of a laminated base material to occur, and the pressure-sensitive adhesive layer on the light reflection layer side is hardly yellowed. And it is providing the double-sided adhesive tape with which the adjustment of the brightness (reflectance) of a light reflection layer is easy, and its manufacturing method.
  • a further object of the present invention is to provide a simple method for producing the double-sided pressure-sensitive adhesive tape.
  • this invention is a double-sided adhesive tape which has the lamination base material which has at least one layer of bright printing layer between the resin film and the black printing layer, and the adhesive layer provided in both surfaces of this lamination base material.
  • the double-sided pressure-sensitive adhesive tape is characterized in that the black print layer includes a structure resulting from an aromatic isocyanate curing agent.
  • 2nd this invention is a double-sided adhesive tape which has a lamination base material which has at least 1 layer of bright printing layer between a resin film and a black printing layer, and the adhesive layer provided in both surfaces of this lamination base material.
  • the double-sided pressure-sensitive adhesive tape is characterized in that a static frictional force according to JIS K7125 of the black printing layer with respect to the resin film of the laminated substrate is 2.0 N or less.
  • the present invention is a method for producing the double-sided pressure-sensitive adhesive tape of the first or second aspect of the invention, wherein the black printed layer is formed in one step.
  • the double-sided pressure-sensitive adhesive tape is less prone to blocking and wrinkling of the laminated base material, the light-sensitive adhesive layer side is hardly yellowed, and the lightness (reflectance) of the light-reflective layer can be easily adjusted.
  • the method of manufacturing such a double-sided adhesive tape easily can be provided.
  • FIG. 1 is a schematic cross-sectional view showing an embodiment of the double-sided pressure-sensitive adhesive tape of the present invention.
  • the laminated substrate has a light color printing layer 2 as a light reflection layer between a resin film 1 and a black printing layer 3 as a light shielding layer.
  • the adhesive layer 4 is provided in both surfaces of the laminated base material.
  • the light-color print layer 2 (light reflection layer) side has the pressure-sensitive adhesive layer 4 on the pressure-sensitive adhesive layer 4. Ink components do not migrate and yellowing is less likely to occur.
  • the transmittance on the light reflection side does not decrease, and for example, it is possible to prevent a decrease in luminance and visibility of the backlight surface.
  • the black print layer 3 (light-shielding layer) and the pressure-sensitive adhesive layer 4 are in direct contact with each other, but the decrease in the transmittance of the pressure-sensitive adhesive layer 4 on the light-shielding layer side does not impede the light-reflecting function at all. This is not a problem.
  • the resin film 1 is used when the laminated base material is rolled up immediately after production of the laminated base material (before formation of the pressure-sensitive adhesive layer 4).
  • the black print layer 3 are in contact with each other, and blocking and wrinkles are less likely to occur as compared with the case in which the light color print layer and the black print layer in the prior art are in contact.
  • the black printed layer has a fast curing speed, and in the second aspect of the present invention, the static frictional force is low, so that these have a synergistic effect with a specific layer structure of the laminated base material. The effect of preventing the occurrence of blocking and wrinkles becomes remarkable.
  • one light-colored printing layer 2 constitutes a light reflecting layer, but a laminate of two or more light-colored printing layers 2 constitutes a light reflecting layer as desired. Also good.
  • one black printing layer 3 constitutes a light shielding layer, but two or more black printing layers 3 may constitute a light shielding layer as desired.
  • a light color printing layer 2 and a black color printing layer 3 are directly laminated on the resin film 1 in this order, but between the resin film 1 and the light color printing layer 2 or light color printing.
  • Another arbitrary layer may exist between the layer 2 and the black print layer 3.
  • the pressure-sensitive adhesive layer 4 is directly laminated on the outer surface of the resin film 1 and the outer surface of the black printed layer 3. Any layer may be present.
  • the resin film 1 in the present invention is not particularly limited, and various resin films known to be usable for this type of adhesive tape can be used.
  • a transparent plastic film made of polyester, polyolefin, polyurethane, polyamide, polyimide, polystyrene or the like is preferable, and a polyester film such as a PET (polyethylene terephthalate) film is more preferable from the viewpoint of easy availability and strength stability. .
  • the thickness of the resin film 1 is appropriately determined according to the required thickness of the double-sided pressure-sensitive adhesive tape.
  • the thickness is preferably 2 to 50 ⁇ m, more preferably 6 to 38 ⁇ m.
  • the light color print layer 2 in the present invention is not particularly limited, and various light color print layers that are known to be capable of providing a light reflection function necessary for this type of pressure-sensitive adhesive tape can be used.
  • the light color print layer 2 is easy to adjust the lightness (reflectance) of the light reflection layer as compared with the light reflection layer made of a resin film containing a colorant as described in Patent Document 1.
  • “bright color” means a color such as white or light color that can provide a light reflection function. White is particularly preferable.
  • L * (brightness) defined by the L * a * b * color system of the light color printing layer 2 is preferably 65 or more, more preferably 75 or more.
  • the reflectance of the light color printing layer 2 with respect to the wavelength of 550 nm is preferably 45% or more, more preferably 65% or more. Further, the average reflectance with respect to a wavelength of 380 to 780 nm is preferably 40% or more, more preferably 60% or more.
  • the bright print layer 2 is usually formed by a known printing method using an ink composition.
  • the ink composition includes, for example, a coloring component (ink component), a binder resin, and a curing agent.
  • the binder resin include polyurethane resins, phenol resins, epoxy resins, silicone resins, acrylic resins, polyester resins, and polyolefin resins. Of these, polyurethane resins are preferable.
  • the curing agent include aromatic isocyanate curing agents, aliphatic isocyanate curing agents, and alicyclic isocyanate curing agents. Of these, aromatic isocyanate curing agents are preferred.
  • As the composition ratio of each component a known composition ratio can be adopted, and it may be appropriately determined if necessary.
  • the ink composition used for the light color printing layer 2 can be obtained, for example, by blending a curing agent with a commercially available printing ink containing a coloring component (ink component) and a binder resin.
  • the thickness of the light reflecting layer composed of the light-colored printing layer 2 is appropriately determined according to the required thickness of the double-sided pressure-sensitive adhesive tape and light reflectivity.
  • the thickness of the light reflecting layer is preferably 1 to 20 ⁇ m, more preferably 3 to 12 ⁇ m.
  • the light color printing layer 2 may be a single layer and may constitute a light reflection layer. However, in order to provide sufficient light reflectivity, the light reflection layer 2 is formed by laminating 2 to 6 layers of the light color printing layer 2. It is preferable to configure.
  • the black print layer 3 in the present invention is usually formed by a known printing method using an ink composition.
  • the ink composition includes, for example, a coloring component (ink component), a binder resin, and a curing agent.
  • the binder resin used for the black printing layer 3 include polyurethane resins, phenol resins, epoxy resins, silicone resins, acrylic resins, polyester resins, and polyolefin resins. Among them, polyurethane resins Is preferable, and a polyester polyurethane resin is more preferable.
  • the polyester polyurethane resin is a polyurethane resin that also contains an ester bond in the molecular chain. Both aliphatic and aromatic polyester polyurethane resins can be used.
  • the polyester polyurethane resin can be obtained, for example, by reacting a polyester polyol with polyisocyanate and, if necessary, other components.
  • the binder resin preferably has a relatively high Tg (glass transition temperature).
  • the Tg of the binder resin is preferably 12 ° C. or higher. As a result, tack is lowered even at the initial stage of curing of the black print layer 3, and blocking and wrinkles of the laminated base material are less likely to occur.
  • the curing agent used for the black printing layer 3 include aromatic isocyanate curing agents, aliphatic isocyanate curing agents, and alicyclic isocyanate curing agents.
  • an aromatic isocyanate curing agent is used as the curing agent used for the black print layer 3.
  • the aromatic isocyanate curing agent is a curing agent containing at least an aromatic isocyanate.
  • An aromatic isocyanate is a compound having an aromatic group such as a benzene ring and an isocyanate group, and usually has two or more isocyanate groups.
  • the aromatic isocyanate for example, a compound having a benzene ring and two isocyanate groups is preferable, and xylylene diisocyanate is particularly preferable.
  • the aromatic isocyanate curing agent generally includes an adduct of an aromatic isocyanate (adduct of diisocyanate and trimethylolpropane) and an isocyanurate (triisomer of diisocyanate).
  • the blending amount of the curing agent is preferably 4 to 16 parts by mass, more preferably 6 to 12 parts by mass with respect to 100 parts by mass of the printing ink.
  • the ink composition used for the black printing layer 3 is obtained, for example, by blending a curing agent with a commercially available printing ink containing a coloring component (ink component) and a binder resin.
  • the thickness of the light shielding layer composed of the black print layer 3 is appropriately determined according to the required thickness of the double-sided pressure-sensitive adhesive tape and the light shielding property.
  • the thickness of the light shielding layer is preferably 1 to 8 ⁇ m, more preferably 3 to 6 ⁇ m, and particularly preferably 4 to 6 ⁇ m.
  • the black print layer 3 may be a single layer constituting a light shielding layer, or a plurality of black print layers 3 may be laminated to form a light reflection layer.
  • the black printing layer 3 in the present invention has a relatively fast curing speed, the light-shielding layer can be satisfactorily constituted by the single black printing layer 3, and the manufacturing process can be simplified.
  • the pressure-sensitive adhesive layer 4 in the present invention is not particularly limited, and various pressure-sensitive adhesive layers known to be usable for this type of pressure-sensitive adhesive tape can be used.
  • Examples of the pressure-sensitive adhesive used for the pressure-sensitive adhesive layer 4 include transparent adhesives such as acrylic pressure-sensitive adhesives, rubber-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, polyester-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. Among these, acrylic adhesives, urethane adhesives, and silicone adhesives are preferable.
  • a tackifying resin or a crosslinking agent may be added as necessary.
  • tackifying resins include rosin-based, polyterpene-based, petroleum-based, terpene-phenol-based, and polystyrene-based resins.
  • the crosslinking agent include isocyanate crosslinking agents, epoxy crosslinking agents, aziridine crosslinking agents, and metal chelate crosslinking agents.
  • the thickness of the pressure-sensitive adhesive layer 4 is appropriately determined according to the required thickness of the double-sided pressure-sensitive adhesive tape. Usually, the thickness is preferably 2 to 50 ⁇ m, more preferably 5 to 30 ⁇ m.
  • the laminated base material in the present invention is a base material having at least the resin film 1, the bright print layer 2 and the black print layer 3 described above.
  • the thickness of the laminated substrate is appropriately determined according to the required thickness of the double-sided pressure-sensitive adhesive tape. Usually, the thickness is preferably 12 ⁇ m to 50 ⁇ m, more preferably 10 to 50 ⁇ m.
  • the static frictional force according to JIS K7125 of the black printed layer with respect to the resin film of the laminated base material is 2.0 N or less, preferably 1.4 to 1.8 N.
  • the laminated base material has such a low static frictional force, it becomes difficult for blocking to occur when the laminated base material is wound into a roll immediately after production, and it is also difficult to generate wrinkles due to frictional force at the time of winding. Become.
  • the measuring method of the static friction force is in accordance with JIS K7125, and another laminated base material fixed to a sliding piece having a weight of 200 g is placed on the resin film 1 of the laminated base material so that the black printed layer 3 is in contact, and the speed is 300 mm. Move the sliding piece in parallel at / min and measure the maximum stress (static friction force) that can be obtained first. Details thereof will be described in the column of Examples described later.
  • the laminated base material having a low static friction force in the second aspect of the present invention can be obtained, for example, by appropriately selecting conditions such as the type of curing agent for the black print layer and the type of binder resin.
  • the curing agent the aromatic isocyanate curing agent (first invention) described above is particularly preferable.
  • the second aspect of the present invention is not limited to this. Even when the aromatic isocyanate curing agent is not used, it is possible to obtain a laminated base material having a low static friction force by using, for example, a binder resin having a relatively high Tg.
  • the double-sided pressure-sensitive adhesive tape of the present invention is a pressure-sensitive adhesive tape having the above-described laminated base material and the pressure-sensitive adhesive layer 4 provided on both surfaces of the laminated base material. Since the double-sided pressure-sensitive adhesive tape of the present invention can avoid blocking of the printing layer and yellowing of the pressure-sensitive adhesive layer, it can be used for fixing a liquid crystal display panel and a backlight unit of a liquid crystal display device used in a mobile phone, a touch panel, etc. It can be used suitably.
  • the laminated base material in the present invention can be produced, for example, by forming the bright print layer 2 on the resin film 1 and forming the black print layer 3 thereon.
  • the method for producing the double-sided pressure-sensitive adhesive tape of the first invention includes, for example, a step of forming the black print layer 3 using an ink composition containing a coloring component (ink component), a binder resin, and an aromatic isocyanate curing agent.
  • a step of forming a light print layer 2 on the resin film 1 a step of forming a black print layer 3 on the light print layer 2 using the ink composition to obtain a laminated substrate, and this It has the process of forming the adhesive layer 4 on both surfaces of a laminated base material.
  • the method for producing the double-sided pressure-sensitive adhesive tape of the second invention includes, for example, a step of producing a laminated base material having a static frictional force of 2.0 N or less according to JIS K7125 of the black printing layer 3 with respect to the resin film 1.
  • the step of forming the light color printing layer 2 on the resin film 1, the black color of the black color printing layer 3 on the light color printing layer 2, and the static friction of the black color printing layer 3 against the resin film 1 in accordance with JIS K 7125 It has the process of obtaining the laminated base material whose force is 2.0 N or less, and the process of forming the adhesive layer 4 on both surfaces of this laminated base material.
  • a further method of the present invention is characterized in that the black print layer 3 is formed in one step.
  • the conventional black print layer for light shielding applications is generally formed by laminating 2 to 3 layers in order to obtain sufficient light shielding properties.
  • the black print layer 3 of the present invention can form a sufficient light shielding layer in one step. Thereby, it is possible to avoid the problem that the unevenness of the unevenness of the coating surface becomes large and blocking easily occurs, and the manufacturing process of the laminated base material can be greatly reduced.
  • a known printing method can be used as a method for printing the bright print layer 2 and the black print layer 3.
  • the printing method include a gravure printing method, a flexographic printing method, an offset printing method, a relief printing method, and a screen printing method. Of these, the gravure printing method is preferable.
  • part means “part by mass”.
  • Tg of the binder resin b1 is a DSC measurement value
  • Tg of the binder resins b2 to b5 are values according to manufacturer information.
  • Probe tack was measured by a test method according to JIS Z 0237. Specifically, when the binder resin composition layer side of the same binder coat film as that in the blocking test was pressed on a SUS cylinder having a diameter of 3 mm for 1.0 second with a load of 20 g and then peeled off at a speed of 1.0 cm / second. The adhesive force was measured, and the average value of the measured values of the five tests was defined as probe tack (N). The results are shown in Tables 1 and 2.
  • the static frictional force (transparent PET film of binder coat film same as blocking test vs. binder resin composition layer of binder coat film) was measured by a test method according to JIS K 7125. Specifically, the binder coat film was fixed to the test table with the transparent PET film side facing up. On the other hand, another binder coat film (size: 25 mm ⁇ 25 mm) was fixed to a sliding piece having a weight of 200 g. Then, the slip piece was gently placed on the test table so that the transparent PET film surface of the binder coat film fixed to the test table and the binder resin composition layer surface of the binder coat film fixed to the slide piece were in contact with each other. The sliding piece was moved in parallel at a speed of 300 mm / min, and the maximum stress (static friction force) obtained first was measured. The results are shown in Tables 1 and 2.
  • the binder resin composition 3 having no static isocyanate curing agent (ar-i) but having a high static friction force was excellent in all properties.
  • the binder resin compositions C5 to C7 having a low static friction force showed blocking in the blocking test and high probe tack.
  • Black ink (manufactured by Toyo Ink Co., Ltd., trade name: E039 PETAK black) was prepared.
  • This black ink is a product in which the same resin as the binder resin b1 in the binder resin composition 1 described above is colored black.
  • To 100 parts of the black ink 8.0 parts by mass of the same aromatic isocyanate curing agent (trade name TK Hardener, Toyo Ink Co., Ltd.) as the curing agent (ar-i) in the binder resin composition 1 is blended, A black ink composition 1 was obtained.
  • White ink (trade name E039PET63 white, manufactured by Toyo Ink Co., Ltd.) was prepared.
  • This white ink is a product in which the same resin as the binder resin b1 in the binder resin composition 1 described above is colored white.
  • To 100 parts of this white ink 6.0 parts by mass of the same aromatic isocyanate curing agent (trade name TK Hardener, manufactured by Toyo Ink Co., Ltd.) as the curing agent (ar-i) in the binder resin composition 1 is blended.
  • a white ink composition was obtained.
  • an acrylic copolymer having a solid content concentration of 30% was obtained.
  • a curing agent trade name Coronate L-45E, manufactured by Nippon Polyurethane Industry Co., Ltd.
  • a transparent acrylic pressure-sensitive adhesive composition is applied to both surfaces of the laminated base material A to form a pressure-sensitive adhesive layer having a thickness of 18 ⁇ m, and the pressure-sensitive adhesive layer 4 / black printing layer 3 / white printing layer (2 A double-sided pressure-sensitive adhesive tape having a total thickness of about 60 ⁇ m composed of a laminated structure of light-colored printing layer 2) / resin film 1 / adhesive layer 4 formed by repeated printing was obtained.
  • Example 2 (Preparation of laminated substrate B) A laminated substrate B having a total thickness of 17 ⁇ m was produced in the same manner as the laminated substrate A of Example 1 except that a transparent PET film having a thickness of 6 ⁇ m was used.
  • a double-sided pressure-sensitive adhesive tape having a total thickness of about 60 ⁇ m was prepared in the same manner as in Example 1 except that the laminated base material B was used and the thickness of the pressure-sensitive adhesive layer was changed to 21 ⁇ m.
  • ⁇ Comparative Example 1> (Preparation of black ink composition 2) The black ink composition 1 of Example 1 except that the same aliphatic isocyanate curing agent (trade name LP Hardener, manufactured by Toyo Ink Co., Ltd.) as the curing agent (al-i) in the comparative binder resin composition C1 was used. A black ink composition 2 was prepared in the same manner as described above.
  • a double-sided adhesive tape having a thickness of about 60 ⁇ m was prepared in the same manner as in Example 1 except that the laminated substrate C was used.
  • ⁇ Comparative Example 2> (Preparation of laminated substrate D) On one side of a 12 ⁇ m thick transparent PET film, gravure printing was performed twice using the white ink composition to form a white printed layer having a thickness of 6 ⁇ m. Then, gravure printing is performed once on the other surface of the transparent PET film using the black ink composition 1 to form a black printed layer having a thickness of 5 ⁇ m, and a laminated substrate D having a total thickness of 23 ⁇ m is obtained. It was.
  • a pressure-sensitive adhesive layer having the same thickness of 18 ⁇ m as that of Example 1 was formed on both surfaces of the laminated substrate D, and pressure-sensitive adhesive layer 4 / black printing layer 3 / resin film 1 / white printing layer (light formed by two printings).
  • a double-sided pressure-sensitive adhesive tape having a total thickness of about 60 ⁇ m composed of a laminated structure of color printing layer 2) / pressure-sensitive adhesive layer 4 was obtained.
  • the static friction force (transparent PET film of laminated substrate vs. black printed layer of laminated substrate) was measured by a test method according to JIS K 7125. Specifically, the laminated substrate was fixed to the test table so that the transparent PET film side was on the top. On the other hand, another laminated substrate (size: 25 mm ⁇ 25 mm) was fixed to a sliding piece having a weight of 200 g. Then, gently place the sliding piece on the test table so that the transparent PET film surface of the laminated base material fixed to the test table and the black printed layer surface of the laminated base material fixed to the sliding piece contact each other at a speed of 300 mm / min.
  • the sliding piece was moved in parallel, and the maximum stress (static friction force) obtained first was measured. Moreover, regarding the comparative example 2, the static frictional force of the white printed layer of a laminated base material vs. the black printed layer of a laminated base material was measured by the same method.
  • each abbreviation indicates the following product.
  • “B1” Polyester polyurethane resin (trade name E039 Medium Z, manufactured by Toyo Ink Co., Ltd.)
  • “Ar-i” xylylene diisocyanate (aromatic isocyanate-based curing agent) (trade name TK Hardener, manufactured by Toyo Ink Co., Ltd.)
  • “Al-i” Hexamethylene diisocyanate (aliphatic isocyanate curing agent) (trade name LP Hardener, manufactured by Toyo Ink Co., Ltd.)
  • the double-sided pressure-sensitive adhesive tape of the present invention has little yellowing of the pressure-sensitive adhesive layer, it can stably secure light-shielding properties and light reflectivity for a long period of time. Moreover, since the ink of a printing layer hardens

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Liquid Crystal (AREA)
  • Adhesives Or Adhesive Processes (AREA)
PCT/JP2015/085972 2015-12-24 2015-12-24 両面粘着テープ WO2017109883A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/JP2015/085972 WO2017109883A1 (ja) 2015-12-24 2015-12-24 両面粘着テープ
JP2017557576A JP6526240B2 (ja) 2015-12-24 2015-12-24 両面粘着テープ
KR1020187020302A KR102162899B1 (ko) 2015-12-24 2015-12-24 양면 점착 테이프
CN201580085433.4A CN108368389B (zh) 2015-12-24 2015-12-24 双面粘着带
TW105142970A TWI738698B (zh) 2015-12-24 2016-12-23 雙面黏著帶

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PCT/JP2015/085972 WO2017109883A1 (ja) 2015-12-24 2015-12-24 両面粘着テープ

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WO2017109883A1 true WO2017109883A1 (ja) 2017-06-29

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TWI738698B (zh) 2021-09-11
CN108368389A (zh) 2018-08-03
CN108368389B (zh) 2021-12-28
KR102162899B1 (ko) 2020-10-07
JP6526240B2 (ja) 2019-06-05
JPWO2017109883A1 (ja) 2018-10-04
KR20180095014A (ko) 2018-08-24

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