Classifications

• • 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
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/35—Heat-activated
• • 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
  • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
  • C09J153/02—Vinyl aromatic monomers and conjugated dienes
  • C09J153/025—Vinyl aromatic monomers and conjugated dienes modified
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
  • B05D5/10—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an adhesive surface
• • 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
  • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
  • C09J153/02—Vinyl aromatic monomers and conjugated dienes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D1/00—Processes for applying liquids or other fluent materials
  • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
  • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
  • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/10—Esters; Ether-esters
  • C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L57/00—Compositions of unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C08L57/02—Copolymers of mineral oil hydrocarbons
• • 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
  • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
  • C09J11/02—Non-macromolecular additives
  • C09J11/06—Non-macromolecular additives organic
• • 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
  • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
  • C09J11/08—Macromolecular additives
• • 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
  • C09J125/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Adhesives based on derivatives of such polymers
  • C09J125/02—Homopolymers or copolymers of hydrocarbons
  • C09J125/04—Homopolymers or copolymers of styrene
  • C09J125/08—Copolymers of styrene
  • C09J125/10—Copolymers of styrene with conjugated dienes
• • 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
  • C09J157/00—Adhesives based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C09J157/02—Copolymers of mineral oil hydrocarbons
• • 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
  • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
  • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
• • 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
  • C09J7/22—Plastics; Metallised plastics
  • C09J7/26—Porous or cellular plastics
• • 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
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
• • 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
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
  • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • C09J7/387—Block-copolymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2252/00—Sheets
  • B05D2252/02—Sheets of indefinite length
• • 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
  • C09J2301/00—Additional features of adhesives in the form of films or foils
  • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
  • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
• • 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
  • C09J2301/00—Additional features of adhesives in the form of films or foils
  • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
  • C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
• • 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
  • C09J2301/00—Additional features of adhesives in the form of films or foils
  • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
  • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
• • 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
  • C09J2301/00—Additional features of adhesives in the form of films or foils
  • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
  • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
• • 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
  • C09J2400/00—Presence of inorganic and organic materials
  • C09J2400/20—Presence of organic materials
  • C09J2400/26—Presence of textile or fabric
  • C09J2400/263—Presence of textile or fabric in the substrate
• • 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
  • C09J2453/00—Presence of block copolymer

Definitions

• the present invention relates to a hot melt adhesive composition, an adhesive tape, and a method for producing an adhesive tape.
• Adhesive tapes in which a styrene-based block copolymer and an adhesive containing a tackifier and the like are applied to the base material are used for various purposes.
• non-woven fabric is widely used as a tape base material because it is a porous body and therefore exhibits sound deadening properties, and has excellent mechanical strength represented by tensile strength and is inexpensive.
• the non-woven fabric is porous and has the backside of the base material of the coating liquid
• the solvent-based adhesive and the water-based adhesive have low viscosities and it has been considered difficult to apply them directly. Therefore, a method of directly coating the substrate by using a hot melt adhesive having a relatively high viscosity can be considered.
• a hot-melt adhesive is applied to a porous substrate with large irregularities such as a non-woven fabric
• the adhesive coating surface becomes uneven although the adhesive does not wrap around the substrate, and the contact area of the adhesive with the adherend becomes uneven. Since it becomes small, there is a problem that the adhesive strength and the holding power are not sufficiently developed.
• a release agent may be applied to the back surface of the base material, but to apply the release agent to a porous base material such as a non-woven fabric, the release agent is dissolved in an organic solvent such as toluene, for example. Since the prepared release agent solution must be applied and the viscosity of the solution is low, there is a problem of the backside of the base material as in the case of applying the above-mentioned pressure-sensitive adhesive. Therefore, a release agent is not required, and an adhesive that exhibits appropriate adhesive strength and holding power that adheres well to the adherend is required.
• the present invention has been made in view of such a problem, and provides a hot melt adhesive composition that exhibits appropriate adhesive force and holding force to an adherend when a porous base material is used. Is.
• the present invention contains a styrene-based block copolymer, a tackifier, and a plasticizing agent.
• the styrene-based block copolymer is a styrene-butadiene block copolymer, and the butadiene portion is partially contained.
• a hot melt adhesive that is hydrogenated and contains 65 to 190 parts by mass of the tackifier and 0.1 to 24 parts by mass of the plasticizer with respect to 100 parts by mass of the styrene block copolymer.
• the composition is provided.
• the tackifier is a petroleum resin.
• the petroleum resin is at least one selected from the group consisting of C5 petroleum resin, C5C9 petroleum resin, and hydrogenated C9 petroleum resin.
• the plasticizer is DINA (diisononyl adipate).
• an adhesive tape comprising a porous base material and a pressure-sensitive adhesive layer provided on the porous base material, wherein the pressure-sensitive adhesive layer contains the hot-melt pressure-sensitive adhesive composition.
• the adhesive force in JISZ0237 "10. Adhesive force" is 1.5 N / cm or more, and the adhesive force in JISZ0237 "13. Adhesive force" is 10 min or more.
• the method for producing an adhesive tape which comprises a step of applying the hot melt adhesive composition onto the base material by a non-contact coating method.
• the hot melt adhesive composition according to an embodiment of the present invention contains a styrene-based block copolymer, a tackifier, and a plasticizer.
• the styrene-based block copolymer is a styrene-butadiene block copolymer, and the butadiene portion is partially hydrogenated.
• Examples of the styrene-butadiene block copolymer in which the butadiene moiety is partially hydrogenated include a styrene-butadiene-butylene-styrene block copolymer (SBBS).
• the butadiene portion of the styrene-butadiene block copolymer is preferably hydrogenated in an amount of 20% by mass to 90% by mass, and more preferably 30% by mass to 80% by mass.
• the weight average molecular weight of the styrene-butadiene block copolymer is not particularly limited, but is, for example, preferably 30,000 to 500,000, and more preferably 60,000 to 300,000.
• the weight average molecular weight can be determined by the gel permeation chromatography (GPC) method.
• the styrene content of the styrene-butadiene block copolymer is preferably 5 to 50% by mass, more preferably 10 to 40% by mass. By setting it in such a range, an appropriate adhesive force and holding force to the adherend are exhibited. Styrene content can be measured using the method described in JIS K6383.
• one type of the styrene-based block copolymer may be used as an adhesive, it can also be preferably used by blending two or more types having different styrene content and weight average molecular weight. That is, by using two or more types of styrene-based block copolymers in combination, for example, the melt viscosity at the time of coating with an adhesive can be lowered, and the viscosity at the time of coating can be easily controlled and therefore preferably used. Can be done. Further, when two or more types of styrene-based block copolymers are used in combination, it is preferable in terms of adhesive properties as well as the ability to adjust the adhesive force and holding force of the adhesive.
• the tackifier is not particularly limited, but is preferably a petroleum resin.
• the petroleum resin include C9 petroleum resin, hydrogenated C9 petroleum resin, C5 petroleum resin, alicyclic petroleum resin, alicyclic / aromatic petroleum resin, terpene resin, rosin resin, and rosin ester resin. , Terpene-phenol resin, alkylphenol resin and the like.
• the petroleum resin is preferably at least one selected from the group consisting of C5 petroleum resin, C5C9 petroleum resin, and hydrogenated C9 petroleum resin. Further, hydrogenated C9 petroleum resin is most preferable. The reason is that even if the adhesive tape is used outdoors, it is less deteriorated by exposure to direct sunlight (ultraviolet rays).
• the tackifier is preferably contained in an amount of 65 to 190 parts by mass, more preferably 80 to 150 parts by mass, and further preferably 100 to 150 parts by mass with respect to 100 parts by mass of the styrene block copolymer. Within such a range, it is possible to develop an appropriate adhesive force and holding force to the adherend.
• the content of this tackifier is, for example, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150. , 155,160,165,170,175,180,185,190 parts by mass, and may be within the range between any two of the numerical values exemplified here.
• the hot melt adhesive composition according to one embodiment of the present invention contains a plasticizer.
• the hot melt adhesive composition contains 0.1 to 24 parts by mass of the plasticizer, preferably 1 to 20 parts by mass, and 5 to 15 parts by mass with respect to 100 parts by mass of the styrene block copolymer. Is more preferable.
• a phthalate ester-based plasticizer is preferable because it has good compatibility with styrene-based block copolymers and a plasticizing effect can be obtained with a small amount.
• phthalate-based plasticizers include DINA (diisononyl adipate), DEHP (di- (2-ethylhexyl) phthalate), DBP (dibutylphthalate), BBP (butylbenzylphthalate), DINP (diisononylphthalate), and DIDP (diisodecyl). Phthalate), DNOP (dinormal octyl phthalate) (.
• phthalates other than DINA are used because regulations such as REACH (Registration, Evolution, Autration, and Restriction of Chemicals) may be applied.
• DINA can be preferably used because these regulations do not apply.
• the hot melt adhesive composition according to one embodiment of the present invention contains, if necessary, an inorganic filler, a modifier, a stabilizer, an antioxidant, an ultraviolet absorber, and the like, as long as the effects of the present invention are not impaired. It may contain various additives.
• the adhesive tape according to an embodiment of the present invention includes a porous base material and an adhesive layer provided on the porous base material.
• the adhesive tape has an adhesive strength of JISZ0237 "10.
• Adhesive strength of preferably 1.5 N / cm or more, and more preferably 2.0 N / cm or more.
• the adhesive strength is preferably 8 N / cm or less, and more preferably 6 N / cm or less.
• the adhesive tape has a holding power of JISZ0237 "13. Holding power" of preferably 10 minutes or more, more preferably 20 minutes or more.
• the holding power is preferably 100 min or less, and more preferably 80 min or less. By setting it in such a range, it has a sufficient holding force, but it is easy to handle when it is wound into a tape.
• the porous base material is not particularly limited as long as it is a base material made of a porous material, but a non-woven fabric is preferable because it has excellent mechanical strength represented by tensile strength and is inexpensive.
• the pressure-sensitive adhesive layer contains the above-mentioned hot-melt pressure-sensitive adhesive composition.
• the basis weight of the pressure-sensitive adhesive layer is not particularly limited, but is, for example, 10 to 100 g / m 2 . If the basis weight is too small, the adhesiveness may be insufficient, and if it is too large, the coating performance may be deteriorated.
• the method for producing an adhesive tape according to an embodiment of the present invention includes a step of applying the hot melt adhesive composition onto a substrate.
• the coating method is not particularly limited, but it is preferable to heat the raw material of the adhesive to melt and knead it and apply it by the hot melt method, and it is more preferable to apply it by the non-contact coating method.
• non-contact coating is a cross coater (manufactured by ITW Dynatec).
• ITW Dynatec manufactured by ITW Dynatec.
• a direct adhesive for a base material such as a non-woven fabric
• the base material is impregnated with the pressure-sensitive adhesive, and the adhesive characteristics are significantly deteriorated.
• a cloth coater it is preferable to apply the adhesive to the non-woven fabric because the penetration of the adhesive can be suppressed and the deterioration of the adhesive characteristics is unlikely to occur.
• the pressure-sensitive adhesive composition is applied onto the substrates shown in Tables 1 and 2 by a non-contact coating method so as to have a basis weight of 60 g / m 2 to form a pressure-sensitive adhesive layer.
• Adhesive tape was prepared.
• a pressure-sensitive adhesive as shown in Table 1, a pressure-sensitive adhesive, a plasticizer (DINA, Sunsociizer DINA manufactured by Shin Nihon Rika Co., Ltd.), and an antioxidant are used for the styrene-based block copolymer 100. (BASF Ilganox 1010) and an ultraviolet absorber (BASF TINUVIN P) are added and kneaded at 150 ° C.
• the stitch-bonded non-woven fabric is a porous base material
• the PET film is a non-porous base material.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Wood Science & Technology (AREA)
• Adhesives Or Adhesive Processes (AREA)

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• 2020
  • 2020-09-24 US US17/637,268 patent/US12116510B2/en active Active
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  • 2020-09-24 WO PCT/JP2020/035980 patent/WO2021065662A1/ja not_active Ceased
  • 2020-09-24 EP EP20872041.7A patent/EP4039378B1/en active Active
  • 2020-09-24 KR KR1020227014222A patent/KR20220075364A/ko active Pending
  • 2020-09-24 JP JP2021551147A patent/JPWO2021065662A1/ja active Pending
  • 2020-09-24 CA CA3152486A patent/CA3152486A1/en active Pending
  • 2020-09-24 CN CN202080069104.1A patent/CN114555747A/zh active Pending
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