KR20230139520A - Patch for blocking UV with adhesive layer and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a UV-blocking patch in which a base film layer, a foam layer, an adhesive layer, and a release film layer are laminated in that order, wherein the UV-blocking patch has a higher adhesive force than a UV-blocking patch without a foam layer, and the foam layer has (i) an expansion rate of 160% to 200%, (ii) a porosity of 50% to 74%, and (iii) a thickness of 80 μm to 120 μm.

Description

UV blocking patch including an adhesive layer and manufacturing method thereof {Patch for blocking UV with adhesive layer and manufacturing method thereof}

The present invention relates to a sunscreen patch including an adhesive layer and a method of manufacturing the same.

Adhesive films have a variety of uses for holding, protecting, sealing or masking objects. Adhesive films generally include a base film and an adhesive layer. Meanwhile, to block ultraviolet rays in outdoor sports activities, etc., ultraviolet rays blocking patches including an adhesive layer are being used. Since UV protection patches are attached directly to the skin, such as the face, they require adhesive strength to adhere to the curved skin surface, UV protection effect, and high elasticity.

However, conventional UV-blocking patches are manufactured by laminating non-woven fabric for UV-blocking effect on a general adhesive tape, and there is a lack of research on dedicated adhesive films for UV-blocking patches for application to human skin.

Outdoor patches for UV protection have been developed, but due to their structure including a base layer and an adhesive layer for UV protection, there has been a problem with poor adhesion and feeling of adhesion.

Republic of Korea Patent Publication No. 10-2242158

Accordingly, the technical problem of the present invention was conceived from this point, and the purpose of the present invention is to provide a UV-blocking patch having a UV-blocking function.

Another object of the present invention is to provide a method for manufacturing the UV blocking patch.

The present invention provides a UV-blocking patch in which a base film layer, a foam layer, an adhesive layer, and a release film layer are laminated in that order. In one embodiment of the present invention, the UV blocking patch has a higher adhesive force than an adhesive film without a foam layer, the foam layer includes a UV blocker, and the foam layer has (i) a foaming rate of 160% to 200%. , (ii) a porosity of 50% to 74%, and/or (iii) a thickness of 80 μm to 120 μm, the expansion rate (RE) is, the porosity (ϕ) is, and RE is the expansion rate, Tf is the thickness of the foam layer after foaming, T0 is the thickness of the foam layer before foaming, ϕ is the porosity, V is the total volume of the foam layer, Vv is the volume of the voids, and Vs is the volume of solid outside the voids.

In one embodiment of the present invention, the adhesive film may have an adhesive strength increased by more than 20% compared to an adhesive film without a foam layer.

In one embodiment of the present invention, the foam layer may include a phenol-based antioxidant and an epoxy curing agent in a ratio of 1:1.

In one embodiment of the present invention, the UV blocker may be oxybenzone, zinc oxide, or carbon black.

In one embodiment of the present invention, the method of manufacturing a UV blocking patch includes applying a foaming agent composition to one side of the base film, the foaming rate is 160% to 200%, the porosity is 50% to 74%, and the thickness of the foam layer is 80%. Forming a foam layer on one side of the base film by foaming the foam to a thickness of 120 μm to 120 μm, applying an adhesive composition to one side of the foam layer that is not in contact with the base film, and drying to form an adhesive layer. The foam layer contains a UV blocker. Here, the expansion rate (RE) is And the porosity (ϕ) is where RE is the foaming rate, Tf is the thickness of the foam layer after foaming, T0 is the thickness of the foam layer before foaming, ϕ is the porosity, V is the total volume of the foam layer, Vv is the volume of the voids, and Vs is the outside of the voids. is the volume of the solid.

In one embodiment of the present invention, the foam layer may include a phenol-based antioxidant and an epoxy curing agent in a ratio of 1:1.

In one embodiment of the present invention, the foam layer may include a phenol-based antioxidant and an epoxy curing agent in a ratio of 1:1.

In one embodiment of the present invention, the UV blocker may be oxybenzone, zinc oxide, or carbon black.

The present invention has an adhesive strength that is improved by about 20% or more compared to a UV protection patch without a foam layer. In addition, the UV-blocking patch of the present invention has excellent elasticity and adhesion while also having a UV-blocking effect and hypo-irritating properties to the skin, so it can be attached to the curved skin of the human body in various forms.

However, the effects of the present invention are not limited to the above effects, and may be expanded in various ways without departing from the spirit and scope of the present invention.

1 is a cross-sectional view of an ultraviolet ray blocking patch according to an embodiment of the present invention.
Figure 2 is a diagram showing various examples of use of ultraviolet ray blocking patches according to embodiments of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

Since the present invention can be subject to various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

The invention will now be more fully described below with reference to the accompanying drawings, in which only some, but not all, embodiments of the invention are illustrated. Indeed, these inventions may be embodied in many different forms and should not be construed as limited to the embodiments presented herein. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.

In this specification, “about” is used to indicate that the presented value may vary within the error range, and is usually recognized as ±5%. The term “about” described in this specification is inevitably used due to the possibility of measurement error, and a person skilled in the art will be able to clearly understand its meaning.

The range of values indicated by “to” or “~” in this specification is considered to be that all values within that range are disclosed in this specification.

adhesive film

One embodiment of the present invention discloses an adhesive film. The adhesive film includes a first adhesive layer, a foam layer, a base film layer, and a second adhesive layer. Optionally, a release film layer may be further formed on the outer surfaces of the first adhesive layer and the second adhesive layer. The adhesive film including the release film layer is laminated in the following order: a first release film layer, a first adhesive layer, a foam layer, a base film layer, a second adhesive layer, and a second release film layer.

In one embodiment of the present invention, the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 100 μm to about 600 μm, and in another embodiment of the present invention, about 150 μm. to about 500 μm. At this time, the thickness of the first adhesive layer, foam layer, base film layer, and second adhesive layer is about 25% to about 32%, about 26% to about 39%, respectively, of the total thickness of the film excluding the release film layer. 10% to about 15%, and about 25% to about 32%. In the present invention, the thickness was measured according to ASTM D-3652.

More specifically, in one embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 160 μm, the first adhesive layer, the foam layer, and the base film The thicknesses of the layer and the second adhesive layer are about 40 μm, about 62 μm, about 18 μm, and about 40 μm, respectively, accounting for about 25%, about 39%, about 11%, and about 25%, respectively. In one embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 210 μm, the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer 2 The thickness of the adhesive layer is about 55 μm, about 73 μm, about 27 μm, and about 55 μm, respectively, accounting for about 26%, about 35%, about 13%, and about 26%. In one embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 260 μm, the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer 2 The thickness of the adhesive layer is about 75 μm, about 83 μm, about 27 μm, and about 75 μm, respectively, accounting for about 29%, about 32%, about 10%, and about 29%, respectively. In one embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 310 μm, the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer 2 The thickness of the adhesive layer is about 85 μm, about 97 μm, about 43 μm, and about 85 μm, respectively, accounting for about 27%, about 31%, about 14%, and about 27%. In one embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 360 μm, the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer 2 The thickness of the adhesive layer is about 110 μm, about 97 μm, about 43 μm, and about 110 μm, respectively, accounting for about 31%, about 27%, about 12%, and about 31%. In one embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 410 μm, the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer 2 The thickness of the adhesive layer is about 130 μm, about 107 μm, about 43 μm, and about 130 μm, respectively, accounting for about 32%, about 26%, about 10%, and about 32%. In one embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer is about 510 μm, the first adhesive layer, the foam layer, the base film layer, and the second adhesive layer 2 The thickness of the adhesive layer is about 145 μm, about 146 μm, about 74 μm, and about 145 μm, respectively, accounting for about 28%, about 29%, about 15%, and about 28%.

The release film that can be selectively applied in the present invention may be a film manufactured using polyethylene terephthalate, polyethylene naphthalate, polypropylene terephthalate, polybutylene terephthalate, or polypropylene naphthalate, or a combination thereof.

The first release film layer and the second release film layer protect the adhesive film including the adhesive layer from external physical/chemical stimuli and facilitate movement and work. The first release film layer has a thickness that is thinner or the same as that of the second release film layer, which facilitates the process of winding or unwinding the film during the production process and/or prevents damage to the film. .

In one embodiment of the present invention, the first adhesive layer and the second adhesive layer may include the same or different components, and the first adhesive layer and/or the second adhesive layer may include a polyvinyl alcohol-based adhesive; Acrylic adhesive; Epoxy adhesive; Vinyl acetate adhesive; Urethane-based adhesive; polyester adhesive; polyolefin adhesive; polyvinyl alkyl ether adhesive; Rubber-based adhesive; Vinyl chloride-vinylacetate adhesive; Styrene-butadiene-styrene (SBS) adhesive; Hydrogenated styrene-butadiene-styrene (SEBS) adhesive; Ethylene-based adhesive; It is selected from the group consisting of silicone-based adhesives and acrylic acid ester-based adhesives, but is not limited thereto. In another embodiment of the present invention, the first and second adhesive layers are one or more adhesives selected from the group consisting of acrylic adhesives, epoxy adhesives, and silicone adhesives.

In one embodiment of the present invention, the acrylic adhesive includes at least one acrylic polymer, and the acrylic polymer has a polymerization unit derived from a (meth)acrylic acid ester compound such as, for example, an alkyl (meth)acrylate. It may include, but is not limited to this. In another embodiment of the invention, the acrylic polymer is methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate. , t-butyl (meth)acrylate, sec-butyl (meth)acrylate, pentyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 2-ethylbutyl (meth)acrylate, n-octyl ( It may be meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, lauryl (meth)acrylate, tetradecyl (meth)acrylate, or a combination thereof.

In one embodiment of the present invention, the epoxy-based adhesive includes at least one epoxy compound, and the epoxy compound includes one or more epoxy groups. In particular, compounds with multiple epoxy groups are called polyepoxides, and polyepoxides are compounds containing epoxy groups at the terminals, such as the diglycidyl ether of polyoxyalkylene glycol, and have a skeleton such as polybutadiene polyepoxide. polymers having internal oxirane units, and polymers having epoxy moieties, such as glycidyl methacrylate polymers or copolymers. In one embodiment of the present invention, the epoxy compound may be a saturated or unsaturated, aliphatic, cycloaliphatic, aromatic, or heterocyclic compound, may be substituted or unsubstituted, and may be a monomer or polymer.

Epoxy compounds are commercially available, such as octadecylene oxide, epichlorohydrin, styrene oxide, vinylcyclohexene oxide, glycidol, glycidyl methacrylate, diglycidyl ether of bisphenol A. , diglycidyl ether of cisphenol F, vinylcyclohexane dioxide, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohegen carboxylate, 2-(3,4-epoxycyclohexyl-5,5 -spiro-3,4-epoxy)cyclohexane-metadioxane, bis(3,4-epoxycyclohexyl adipate, dipentene dioxide, epoxidized polybutadiene, beta-3,4-epoxycyclohexylethyltri Epoxy silanes such as methoxy silane and gamma-glycidoxypropyltrimethoxy silane, flame retardant epoxy resins, 1,4-butanediol diglycidyl ether, hydrogenated bisphenol A-epichlorohydrin based epoxy resins, and It may be a polyglycidyl ether of phenol-formaldehyde Novolak.

The adhesive used in one embodiment of the present invention is a pressure sensitive adhesive (PSA), and is a polymer having a molecular weight of about 700,000 to about 800,000 and a glass transition temperature (Tg) of about -25°C to about -20°C. used.

In one embodiment of the present invention, the adhesive layer may further include a colorant to distinguish between the upper and lower surfaces of the adhesive tape. At this time, it is preferable that only one of the first adhesive layer and the second adhesive layer contains a colorant, or that the first adhesive layer and the second adhesive layer each contain a colorant having a different color so that the two sides of the adhesive film are distinguished. .

Both dyes and pigments can be used as the colorant, but it is preferable to use a pigment that can prevent elution into organic solvents and has relatively little weathering resistance. Pigments may be organic pigments and inorganic pigments that are generally used as plastic pigments, but are not limited thereto.

The organic pigments include, for example, azo-based pigments, phthalocyanine-based pigments, aniline-based pigments, and/or quinacridone-based pigments, and the inorganic pigments include, for example, titanium oxide, red iron oxide, ultramarine, and carbon. It may include, but is not limited to, black, and/or cobalt blue. The above pigments may be used one type, or in combination of two or more types, considering physical and chemical properties such as desired color or dispersibility.

In one embodiment of the present invention, the solvent used in the adhesive layer is n-methylpyrrolidone (NMP), dimethyl sulfoxide (DMSO), ethyl lactate ethyl acetate, butyl acetate, methyl ethyl ketone (MEK), and propylene. It may be, but is not limited to, glycol ethylene acetate (PGMEA), toluene, xylene, acetone, cyclopentenone, tetrahydrofuran (THF), dimethyl acetamide, hydrocarbon, cyclohexanone, or ether, and the desired time. Any solution that can maintain the components in the solution in a stable, homogeneous or dispersed state can be used.

The foaming agent used can be selected by those skilled in the art taking into account the form of the foam to be formed, vapor pressure, ease of use, and/or solubility with respect to the polymer used.

The foam layer in the film according to an embodiment of the present invention can be manufactured using a physical foaming agent or a chemical foaming agent. When gas is used as the foaming agent, it is called a physical foaming agent, and when a material that decomposes chemically is used, it is called a chemical foaming agent. If necessary, a nucleating agent can be added to the dissolved foaming agent to increase the pore size and form the pores uniformly.

In one embodiment of the present invention, the physical blowing agent includes a volatile liquid dissolved in a liquid solvent, for example, butane, pentane, neopentane, heptane, isoheptane, benzene, toluene, methyl chloride, trichlorethylene. , dichlorethane, methylene chloride, trichlorofluoromethane, or a combination thereof may be used, but is not limited thereto. Chemical foaming agents cause bubbles to be formed through chemical reactions, for example, azo compounds such as azodicarbonamide or activated azodicarbonamide; It may be 5-phenyltetrazole or sodium bicarbonate, but is not limited thereto.

The physical foaming agent may be formulated, for example, in encapsulated form as a sphere surrounded by thermosetting resin. The thermosetting resin may include, for example, a polyolefin-based resin, a styrene-based resin, a thermosetting polyurethane resin, or a combination thereof, and more specifically, a mixture of sodium bicarbonate and citric acid, dinitrosopentamethylenetetramine. , p-toluenesulfonyl hydrazide, 4-4'-oxybis (benzenesulfonyl hydrazide, azodicarbonamide (1,1'-azobisformamide), p-toluenesulfonyl semicarbazide, 5'-phenyltetrazole, 5'-phenyltetrazole analogue, diisopropylhydrazodicarboxylate, 5'-phenyl-3,6-dihydro-1,3,4-oxadiazin-2-one, or sodium borohydride, or a combination thereof, but is not limited thereto.

The blowing agent is present in the blowing agent composition in the form of particles or beads. The particle size of the particles or beads may be one type, or a mixture of at least two types may be used. In one embodiment of the invention, the particle size is from about 1 μm to about 15 μm, from about 2 μm to about 14 μm, from about 3 μm to about 13 μm, from about 4 μm to about 12 μm, or from about 4 μm to about 4 μm. It is 11 μm. In one embodiment of the invention, a composition comprising a blowing agent having a particle size of about 4 μm to about 5 μm and about 6 μm to about 11 μm, respectively, is used.

A variety of thermoplastic polymers can be used as the material forming the framework of the foam layer, such as polystyrene, polypropylene, polyethylene, polyester, and fluoropolymers, more specifically styrene-isoprine-styrene (SIS), Styrene-based block copolymers, such as styrene-ethylene/butylene/styrene block copolymer (SEBS), and acrylic copolymers, for example, polystyrene, or copolymers thereof, and styrene resins such as impact-resistant polystyrene; polycarbonate; poly(meth)acrylic compounds such as poly(methyl methacrylate) (PMMA); elastomer; polybutadiene; polyisoprine; polychloroprine; caoutchouc; random and block copolymers of styrene and diene, such as styrene-butadiene rubber (SRB); olefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, and ethylene-propylene-diene monomer rubber; amorphous polyolefin; vinyl acetate resin; polyester resins such as poly(ethylene tetraphthalate) (PET), poly(ethylene naphthalate) (PEN), and poly(butylene terephthalate); and amorphous polyester; polystyrene-polyethylene copolymer; polyvinylcyclohexane; polyacrylonitrile; vinyl chloride resins such as polyvinyl chloride; Urethane resins including thermoplastic polyurethane; oriented epoxy; polyamides such as polyamide (nylon), wholly aromatic polyamide (aramid), and amorphous polyamide; polyetherimide; poly(ether ether ketone) (PEEK); Acrylonitrile-butadiene-styrene (ABS) copolymer; fluorinated elastomers; amorphous fluoropolymer; polydimethyl siloxane; poly(phenylene sulfide); polyphenylene oxide; polyphenylene oxide mixtures such as polyphenylene oxide-polystyrene; copolymers containing one or more amorphous components; Or a combination thereof may be used. In one embodiment of the present invention, a urethane resin containing polyurethane with a molecular weight of 100,000 to 150,000, a polyethylene copolymer with a molecular weight of 100,000 to 300,000, or a combination thereof is used.

In addition to the foam and thermoplastic polymer, the foam layer may further include a silane coupling agent, antioxidant, cure retardant, catalyst, colorant, labeling agent, and/or solvent.

Silane coupling agent generally refers to a compound having the formula:

YR-Si-(X) ₃

_{Wherein _}

Silane coupling agents include, but are not limited to, vinylbenzyl cationic silane, gamma-glycidoxypropyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, and beta-mercaptoethyltriethoxysilane. Silane, gamma-chloropropyltrimethoxysilane, n-beta-(aminoethyl) gamma-aminopropyl-trimethoxysilane, gamma-aminopropyltriethoxysilane, vinyltriethoxysilane, vinyl-tris (beta- methoxy-ethoxy)silane, gamma-methacryloxypropyltrimethoxysilane, beta-(3,4 epoxycyclohexyl)ethyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, and/or Vinyltriacetoxysilane may be used.

Antioxidants are ingredients that allow the manufactured film to have improved properties such as improved heat resistance and light resistance, and phenol-based antioxidants or amine-based antioxidants may be used. Phenolic antioxidants include, but are not limited to, IRGANOX 1330, IRGANOX 259, IRGANOX 3114, IRGANOX 565 and CHIBASSORB 119FL sold by BASF; and ADEKASTAB AO-60 sold by Adeka. As amine-based antioxidants, for example, CHIMASSORB 2020FDL, CHIMASSORB 944FDL and CHIMASSORB 119FL sold by BASF can be used.

Cure retarders are used to slow the curing of films, e.g. 4-methoxyphenol, 4-ethoxyphenol, 3-t-butyl-4-hydroxyanisole, 2-t-butyl-4- alkoxyphenols such as hydroxyanisole, and 3,5-di-t-butyl-4-hydroxyanisole; 2-methylhydroquinone, 2,5-dimethylhydroquinone, 2-t-butylhydroquinone, 2,5-di-t-butylhydroquinone, 2,5-di-t-amylhydroquinone, 2,5- Bis(1,1-dimethylbutyl)hydroquinone, and 2,5-bis(1,1-dimethylbutyl)hydroquinone, and 2,5-bis(1,1,3,3-tetramethylbutyl)hydroquinone hydroquinones such as paddy rice; Catechols such as catechol, 4-t-butylcatechol and 3,5-di-t-butylcatechol; and benzoquinones such as benzoquinone, naphthoquinone, and methylbenzoquinone, but are not limited to these.

In one embodiment of the present invention, the catalyst may be an acid catalyst, a salt catalyst, or a mixture thereof. Catalysts include, for example, KOH, NaOH, LiOH, organolithium reagent, Grignard reagent, methanesulfonic acid, sulfonic acid, p-toluenesulfonic acid, or mixtures thereof; Amines such as triethylamine, pyridine, and tributylamine; imidazoles such as methylimidazole and phenylimidazole; Phosphorus-based catalysts such as triphenylphosphine; It may be an organic metal salt of a metal such as tin, titanium, aluminum, bismuth, platinum, rhodium, or palladium.

In the specification of the present invention, “foaming rate” means the percentage of the thickness of the foam layer after foaming relative to the thickness of the foam layer before foaming:

R _E : foaming rate

T _f : Thickness of foam layer after foaming

T ₀ : Thickness of foam layer before foaming

The foaming rate can be adjusted by a person skilled in the art depending on the temperature and foaming time at the time of foaming. In one embodiment of the present invention, the foaming rate of the foam layer in the adhesive film is about 120% to about 200%, in another embodiment of the present invention, about 140% to about 200%, and in another embodiment of the present invention, about 160%. to about 200%, and in another embodiment of the present invention, from about 180% to about 200%. If the foaming rate is less than 120%, the shock absorbing properties cannot be achieved at the desired level, and if the foaming rate is more than 200%, the strength of the foam layer decreases, causing a problem that the foam layer may break. .

Along with the foaming rate of the foam layer, porosity is also a factor that can increase impact strength. Porosity is a value representing the density of the gas contained in the foam sheet or the gas occupancy rate of the sheet, and means the volume occupied by the pores relative to the volume of the entire foam layer:

ϕ: porosity

V: Total volume of foam layer

V _v : volume of voids

V _s : Volume of solid outside the pores

In one embodiment of the present invention, the porosity of the foam layer is 40% to 80%, in another embodiment of the present invention, the porosity is 40% to 74%, and in another embodiment of the present invention, the porosity is 50% to 74%. %am. If the porosity of the foam layer is less than 40%, the desired degree of shock absorption cannot be achieved, and if the porosity of the foam layer exceeds 80%, the desired degree of film strength is not achieved.

The present inventor confirmed that when the thickness of the foam layer is the same, the shock absorption rate increases when the foam rate increases to a certain level, and when the thickness of the foam layer is the same, the shock absorption rate increases when the porosity decreases to a certain level. In other words, the present invention was completed by confirming that the shock absorption rate increases when the foaming rate of the foam layer is high and the size of the pores is varied.

Adhesiveness measures the degree to which the adhesive film is attached to the adhesive using a specified method. The rebound resistance is expressed in units of force, and the force required to peel off the adhesive by pulling in a 180° direction or 90° direction is measured. it means. In the present invention, adhesion was measured according to ASTM D3330 for stainless steel (SUS). More specifically, to measure 180° adhesion, the SUS surface was washed with alcohol, and an adhesive film with a width of 25 mm and a length of 250 mm, with a 50 μm thick PET film attached on one side, was attached to the prepared SUS and a 2 kg compression roller was used. It was compressed by reciprocating once at a speed of 300 mm/min, and after 30 minutes, the end of the test piece was folded 180° and measured at a speed of 300 mm/min. The value when peeled up to 50 mm was measured, and the average value after 3 repetitions was taken as the result.

The adhesive film according to the present invention showed an adhesive strength of 3000 gf/in or more, and in particular, it was found to have an adhesive strength of 3400 gf/in to 3500 gf/in. The adhesive film according to the present invention can be particularly used inside mobile devices, but in this case, if the adhesive strength is less than 2800 gf/in, it is not suitable for use as a product. The present inventor surprisingly found that the adhesive film according to the present invention including a first adhesive layer, a foam layer, a base film layer, and a second adhesive layer had improved adhesive performance compared to an adhesive film manufactured identically except that it did not include a foam layer. was confirmed. Patent, when the foam layer is included, the adhesive strength is improved by about 10% or more, about 15% or more, about 17% or more, about 20% or more, or about 25% compared to the case where the foam layer is not included.

Impact strength was evaluated by the Dupont test. More specifically, when an adhesive tape with a width of 0.7 mm and 12 mm x 12 mm is punched and attached to a 50 mm x 50 mm polycarbonate or Mg adhesive, the foam layer is destroyed and separated when an impact is applied from the outside. The energy value (mJ) was measured. More specifically, the energy when the cushion layer is separated was measured by dropping a 50 g weight from a height of 5 cm, 10 cm, 15 cm, and 20 cm to give impact, and the average value of the three measurements was obtained. is expressed as impact strength.

The impact strength of the adhesive film according to the present invention measured in this way showed improved impact strength compared to the adhesive film without a foam layer. More specifically, the adhesive film without a foam layer showed an impact strength of less than about 100 mJ, but the adhesive film according to the present invention had an impact strength of 100 mJ or more, 150 mJ or more, 200 mJ or more, 250 mJ or more, and 300 mJ. It was confirmed to have above impact strength.

A method of forming an adhesive layer on one side of the foam layer and/or the base film layer can be prepared according to a method known in the art. For example, a layer obtained by applying the adhesive composition to one side of a foam layer and then curing it through heating and drying, or by applying the adhesive to a separate support and then curing it through heating and drying, is applied to the surface of the foam layer. It can be manufactured by placing it on top.

In one embodiment of the present invention, the base film can be selectively used by those skilled in the art depending on the desired elongation of the adhesive tape. Base films, such as polyethylene terephthalate (PET) film, polycyclohexylene dimethylphthalate (PCT) film, polyethylene naphthalate (PEN) film, polyimide (PI) film, polypropylene (OPP) film, thermoplastic Polyurethane (TPU) film, unstretched polypropylene (CPP) film, polyether sulfone (PES) film, polyetherimide (PEI) film, polyphenylene sulfide (PPS) film, polyvinyl chloride (PCV) film, and Polycarbonate (PC) film can be used, but is not limited thereto.

The adhesive film according to an embodiment of the present invention can be manufactured according to a conventional method. For example, primer surface treatment or corona surface treatment is applied to one side of the base film having a desired elongation to strengthen the bonding strength between the foam layer and/or the second adhesive layer and the base film. A composition containing a foaming agent is coated on one side of the surface-treated base film and aged to form a foaming layer. Simultaneously with, before, or after the formation of the foam layer, a second adhesive layer is coated on the back side of the base layer on which the foam layer is formed, and a first adhesive layer is coated on one side of the foam layer and dried to form the first and second adhesive layers. Forms an adhesive layer. Afterwards, a release film is applied to one side of the first and second adhesive layers. However, the above manufacturing method is an example of various manufacturing methods, and can be easily modified and manufactured by a person skilled in the art according to methods known in the art.

UV protection patch

The present inventor further developed a UV protection patch based on the above adhesive film.

The UV blocking patch includes an adhesive layer, a foam layer, and a base film layer. In another embodiment of the present invention, the UV blocking patch further includes a release film layer. The release film layer is located outside the adhesive layer, and at this time, the UV blocking patch is laminated in the order of the release film layer, adhesive layer, foam layer, and base film layer.

In one embodiment of the present invention, the adhesive layer includes a polyvinyl alcohol-based adhesive; Acrylic adhesive; Epoxy adhesive; Vinyl acetate adhesive; Urethane-based adhesive; polyester adhesive; polyolefin adhesive; polyvinyl alkyl ether adhesive; Rubber-based adhesive; Vinyl chloride-vinylacetate adhesive; Styrene-butadiene-styrene (SBS) adhesive; Hydrogenated styrene-butadiene-styrene (SEBS) adhesive; Ethylene-based adhesive; It is selected from the group consisting of silicone-based adhesives and acrylic acid ester-based adhesives, but is not limited thereto. In another embodiment of the present invention, it is one or more adhesives selected from the group consisting of acrylic adhesives, epoxy adhesives, and silicone adhesives.

In one embodiment of the present invention, the acrylic adhesive includes at least one acrylic polymer, and the acrylic polymer has a polymerization unit derived from a (meth)acrylic acid ester compound such as, for example, an alkyl (meth)acrylate. It may include, but is not limited to this. In another embodiment of the invention, the acrylic polymer is methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate. , t-butyl (meth)acrylate, sec-butyl (meth)acrylate, pentyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 2-ethylbutyl (meth)acrylate, n-octyl ( It may be meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, lauryl (meth)acrylate, tetradecyl (meth)acrylate, or a combination thereof.

In one embodiment of the present invention, the epoxy-based adhesive includes at least one epoxy compound, and the epoxy compound includes one or more epoxy groups. In particular, compounds with multiple epoxy groups are called polyepoxides, and polyepoxides are compounds containing epoxy groups at the terminals, such as the diglycidyl ether of polyoxyalkylene glycol, and have a skeleton such as polybutadiene polyepoxide. polymers having internal oxirane units, and polymers having epoxy moieties, such as glycidyl methacrylate polymers or copolymers. In one embodiment of the present invention, the epoxy compound may be a saturated or unsaturated, aliphatic, cycloaliphatic, aromatic, or heterocyclic compound, may be substituted or unsubstituted, and may be a monomer or polymer.

Epoxy compounds are commercially available, such as octadecylene oxide, epichlorohydrin, styrene oxide, vinylcyclohexene oxide, glycidol, glycidyl methacrylate, diglycidyl ether of bisphenol A. , diglycidyl ether of cisphenol F, vinylcyclohexane dioxide, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohegen carboxylate, 2-(3,4-epoxycyclohexyl-5,5 -spiro-3,4-epoxy)cyclohexane-metadioxane, bis(3,4-epoxycyclohexyl adipate, dipentene dioxide, epoxidized polybutadiene, beta-3,4-epoxycyclohexylethyltri Epoxy silanes such as methoxy silane and gamma-glycidoxypropyltrimethoxy silane, flame retardant epoxy resins, 1,4-butanediol diglycidyl ether, hydrogenated bisphenol A-epichlorohydrin based epoxy resins, and It may be a polyglycidyl ether of phenol-formaldehyde Novolak.

The adhesive used in one embodiment of the present invention is a pressure sensitive adhesive (PSA), and is a polymer having a molecular weight of about 700,000 to about 800,000 and a glass transition temperature (Tg) of about -25°C to about -20°C. used.

Both dyes and pigments can be used as the colorant, but it is preferable to use a pigment that can prevent elution into organic solvents and has relatively little weathering resistance. Pigments may be organic pigments and inorganic pigments that are generally used as plastic pigments, but are not limited thereto.

The organic pigments include, for example, azo-based pigments, phthalocyanine-based pigments, aniline-based pigments, and/or quinacridone-based pigments, and the inorganic pigments include, for example, titanium oxide, red iron oxide, ultramarine, and carbon. It may include, but is not limited to, black, and/or cobalt blue. The above pigments may be used one type, or in combination of two or more types, considering physical and chemical properties such as desired color or dispersibility.

In one embodiment of the present invention, the solvent used in the adhesive layer is n-methylpyrrolidone (NMP), dimethyl sulfoxide (DMSO), ethyl lactate ethyl acetate, butyl acetate, methyl ethyl ketone (MEK), and propylene. It may be, but is not limited to, glycol ethylene acetate (PGMEA), toluene, xylene, acetone, cyclopentenone, tetrahydrofuran (THF), dimethyl acetamide, hydrocarbon, cyclohexanone, or ether, and the desired time. Any solution that can maintain the components in the solution in a stable, homogeneous or dispersed state can be used.

In one embodiment of the present invention, the foam layer can be manufactured using a physical foaming agent or a chemical foaming agent. When gas is used as the foaming agent, it is called a physical foaming agent, and when a material that decomposes chemically is used, it is called a chemical foaming agent. If necessary, a nucleating agent can be added to the dissolved foaming agent to increase the pore size and form the pores uniformly.

In one embodiment of the present invention, the physical blowing agent includes a volatile liquid dissolved in a liquid solvent, for example, butane, pentane, neopentane, heptane, isoheptane, benzene, toluene, methyl chloride, trichlorethylene. , dichlorethane, methylene chloride, trichlorofluoromethane, or a combination thereof may be used, but is not limited thereto. Chemical foaming agents cause bubbles to be formed through chemical reactions, for example, azo compounds such as azodicarbonamide or activated azodicarbonamide; It may be 5-phenyltetrazole or sodium bicarbonate, but is not limited thereto.

The physical foaming agent may be formulated, for example, in encapsulated form as a sphere surrounded by thermosetting resin. The thermosetting resin may include, for example, a polyolefin-based resin, a styrene-based resin, a thermosetting polyurethane resin, or a combination thereof, and more specifically, a mixture of sodium bicarbonate and citric acid, dinitrosopentamethylenetetramine. , p-toluenesulfonyl hydrazide, 4-4'-oxybis (benzenesulfonyl hydrazide, azodicarbonamide (1,1'-azobisformamide), p-toluenesulfonyl semicarbazide, 5'-phenyltetrazole, 5'-phenyltetrazole analogue, diisopropylhydrazodicarboxylate, 5'-phenyl-3,6-dihydro-1,3,4-oxadiazin-2-one, or sodium borohydride, or a combination thereof, but is not limited thereto.

The blowing agent is present in the blowing agent composition in the form of particles or beads. The particle size of the particles or beads may be one type, or a mixture of at least two types may be used. In one embodiment of the invention, the particle size is from about 1 μm to about 15 μm, from about 2 μm to about 14 μm, from about 3 μm to about 13 μm, from about 4 μm to about 12 μm, or from about 4 μm to about 4 μm. It is 11 μm. In one embodiment of the invention, a composition comprising a blowing agent having a particle size of about 4 μm to about 5 μm and about 6 μm to about 11 μm, respectively, is used.

A variety of thermoplastic polymers can be used as the material forming the framework of the foam layer, such as polystyrene, polypropylene, polyethylene, polyester, and fluoropolymers, more specifically styrene-isoprine-styrene (SIS), Styrene-based block copolymers, such as styrene-ethylene/butylene/styrene block copolymer (SEBS), and acrylic copolymers, for example, polystyrene, or copolymers thereof, and styrene resins such as impact-resistant polystyrene; polycarbonate; poly(meth)acrylic compounds such as poly(methyl methacrylate) (PMMA); elastomer; polybutadiene; polyisoprine; polychloroprine; caoutchouc; random and block copolymers of styrene and diene, such as styrene-butadiene rubber (SRB); olefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, and ethylene-propylene-diene monomer rubber; amorphous polyolefin; vinyl acetate resin; polyester resins such as poly(ethylene tetraphthalate) (PET), poly(ethylene naphthalate) (PEN), and poly(butylene terephthalate); and amorphous polyester; polystyrene-polyethylene copolymer; polyvinylcyclohexane; polyacrylonitrile; vinyl chloride resins such as polyvinyl chloride; Urethane resins including thermoplastic polyurethane; oriented epoxy; polyamides such as polyamide (nylon), wholly aromatic polyamide (aramid), and amorphous polyamide; polyetherimide; poly(ether ketone) (PEEK); Acrylonitrile-butadiene-styrene (ABS) copolymer; fluorinated elastomers; amorphous fluoropolymer; polydimethyl siloxane; poly(phenylene sulfide); polyphenylene oxide; polyphenylene oxide mixtures such as polyphenylene oxide-polystyrene; copolymers containing one or more amorphous components; Or a combination thereof may be used. In one embodiment of the present invention, a urethane resin containing polyurethane with a molecular weight of 100,000 to 150,000, a polyethylene copolymer with a molecular weight of 100,000 to 300,000, or a combination thereof is used.

In addition to the foam and thermoplastic polymer, the foam layer may further include a silane coupling agent, antioxidant, cure retardant, catalyst, colorant, labeling agent, and/or solvent.

Silane coupling agent generally refers to a compound having the formula:

YR-Si-(X) ₃

_{Wherein _}

Silane coupling agents include, but are not limited to, vinylbenzyl cationic silane, gamma-glycidoxypropyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, and beta-mercaptoethyltriethoxysilane. Silane, gamma-chloropropyltrimethoxysilane, n-beta-(aminoethyl) gamma-aminopropyl-trimethoxysilane, gamma-aminopropyltriethoxysilane, vinyltriethoxysilane, vinyl-tris (beta- methoxy-ethoxy)silane, gamma-methacryloxypropyltrimethoxysilane, beta-(3,4 epoxycyclohexyl)ethyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, and/or Vinyltriacetoxysilane may be used.

Antioxidants are ingredients that allow the manufactured patch to have improved properties such as improved heat resistance and light resistance, and phenol-based antioxidants or amine-based antioxidants may be used. Phenolic antioxidants include, but are not limited to, IRGANOX 1330, IRGANOX 259, IRGANOX 3114, IRGANOX 565 and CHIBASSORB 119FL sold by BASF; and ADEKASTAB AO-60 sold by Adeka. As amine-based antioxidants, for example, CHIMASSORB 2020FDL, CHIMASSORB 944FDL and CHIMASSORB 119FL sold by BASF can be used.

Set retarders are used to slow the hardening of patches, for example 4-methoxyphenol, 4-ethoxyphenol, 3-t-butyl-4-hydroxyanisole, 2-t-butyl-4- alkoxyphenols such as hydroxyanisole, and 3,5-di-t-butyl-4-hydroxyanisole; 2-methylhydroquinone, 2,5-dimethylhydroquinone, 2-t-butylhydroquinone, 2,5-di-t-butylhydroquinone, 2,5-di-t-amylhydroquinone, 2,5- Bis(1,1-dimethylbutyl)hydroquinone, and 2,5-bis(1,1-dimethylbutyl)hydroquinone, and 2,5-bis(1,1,3,3-tetramethylbutyl)hydroquinone hydroquinones such as paddy rice; Catechols such as catechol, 4-t-butylcatechol and 3,5-di-t-butylcatechol; and benzoquinones such as benzoquinone, naphthoquinone, and methylbenzoquinone, but are not limited to these.

In one embodiment of the present invention, the catalyst may be an acid catalyst, a salt catalyst, or a mixture thereof. Catalysts include, for example, KOH, NaOH, LiOH, organolithium reagent, Grignard reagent, methanesulfonic acid, sulfonic acid, p-toluenesulfonic acid, or mixtures thereof; Amines such as triethylamine, pyridine, and tributylamine; imidazoles such as methylimidazole and phenylimidazole; Phosphorus-based catalysts such as triphenylphosphine; It may be an organic metal salt of a metal such as tin, titanium, aluminum, bismuth, platinum, rhodium, or palladium.

In one embodiment of the present invention, a sunscreen is further added to the foam layer. Sunscreens include benzene-based organic components such as oxybenzone or avobenzone; Inorganic car components such as zinc oxide or titanium dioxide; or carbon black; Or a mixture thereof can be used.

The above sunscreen contains about 0.1 parts by weight to about 4 parts by weight based on 100 parts by weight of the foaming agent composition. In one embodiment of the present invention, the sunscreen is used in an amount of about 0.2 parts by weight to about 3.5 parts by weight, about 0.3 parts by weight to about 3.5 parts by weight, about 0.4 parts by weight to about 3.5 parts by weight, about 0.5 parts by weight based on 100 parts by weight of the foaming agent composition. parts by weight to about 3.5 parts by weight, about 0.6 parts by weight to about 3.5 parts by weight, about 0.7 parts by weight to about 3.5 parts by weight, about 0.8 parts by weight to about 3.5 parts by weight, about 0.9 parts by weight to about 3.5 parts by weight, about 0.5 parts by weight Parts by weight to about 4.0 parts by weight, about 0.5 parts by weight to about 3.9 parts by weight, about 0.5 parts by weight to about 3.8 parts by weight, about 0.5 parts by weight to about 3.7 parts by weight, about 0.5 parts by weight to about 3.6 parts by weight, about 0.5 parts by weight. Part by weight to about 3.5 parts by weight, about 0.5 to about 3.4 parts by weight, about 0.5 to about 3.3 parts by weight, about 0.5 to about 3.2 parts by weight, or about 0.5 to about 3.1 parts by weight. .

When oxybenzone is used as the sunscreen, it is used in an amount of about 0.1 parts by weight to about 3.9 parts by weight, about 0.2 parts by weight to about 3.8 parts by weight, about 0.3 parts by weight to about 3.7 parts by weight, and about 0.4 parts by weight based on 100 parts by weight of the foaming agent composition. Parts by weight to about 3.6 parts by weight, about 0.5 parts by weight to about 3.5 parts by weight, about 0.6 parts by weight to about 3.4 parts by weight, about 0.7 parts by weight to about 3.3 parts by weight, about 0.8 parts by weight to about 3.2 parts by weight, about 0.9 parts by weight. parts by weight to about 3.1 parts by weight, or about 1.0 parts by weight to about 3.0 parts by weight, and in one embodiment of the present invention, oxybenzone is present in an amount of about 1 part by weight, about 1.5 parts by weight, about 2 parts by weight, based on 100 parts by weight of the blowing agent composition. parts by weight, about 2.5 parts by weight, or about 3 parts by weight.

When zinc oxide is used as the sunscreen, it is used in an amount of about 0.1 to about 1.9 parts by weight, about 0.2 to about 1.8 parts by weight, about 0.3 to about 1.7 parts by weight, and about 0.4 parts by weight, based on 100 parts by weight of the foaming agent composition. parts by weight to about 1.6 parts by weight, about 0.5 parts by weight to about 1.5 parts by weight, about 0.6 parts by weight to about 1.4 parts by weight, about 0.7 parts by weight to about 1.3 parts by weight, about 0.8 parts by weight to about 1.2 parts by weight, or about It contains 0.9 parts by weight to about 1.1 parts by weight, and in one embodiment of the present invention, zinc oxide contains about 1.0 parts by weight based on 100 parts by weight of the blowing agent composition.

When carbon black is used as the sunscreen, it is used in an amount of about 0.3 parts by weight to about 2.1 parts by weight, about 0.4 parts by weight to about 2.0 parts by weight, about 0.5 parts by weight to about 1.9 parts by weight, and about 0.6 parts by weight based on 100 parts by weight of the foaming agent composition. parts by weight to about 1.8 parts by weight, about 0.7 parts by weight to about 1.7 parts by weight, about 0.8 parts by weight to about 1.6 parts by weight, about 0.9 parts by weight to about 1.5 parts by weight, about 1.0 parts by weight to about 1.4 parts by weight, or about It contains 1.1 parts by weight to about 1.3 parts by weight, and in one embodiment of the present invention, zinc oxide contains about 1.2 parts by weight based on 100 parts by weight of the blowing agent composition.

In one embodiment of the present invention, the base film layer can be selectively used by those skilled in the art depending on the desired elongation of the adhesive tape. Base films, for example, polyethylene terephthalate (PET) film, polycyclohexylene dimethylphthalate (PCT) film, polyethylene naphthalate (PEN) film, polyethylene (PE) film, polyimide (PI) film, polypropylene. (OPP) film, thermoplastic polyurethane (TPU) film, unstretched polypropylene (CPP) film, polyether sulfone (PES) film, polyetherimide (PEI) film, polyphenylene sulfide (PPS) film, polyvinyl chloride (PCV) film, polycarbonate (PC) film, or fabric such as cotton, hemp, ramie, hemp, silk, wool, rayon, modal, or protein fiber can be used, but is not limited thereto.

The release film that can be selectively applied in the present invention may be a film manufactured using polyethylene terephthalate, polyethylene naphthalate, polypropylene terephthalate, polybutylene terephthalate, or polypropylene naphthalate, or a combination thereof.

The release film layer protects the adhesive film including the adhesive layer from external physical/chemical stimuli and facilitates movement and work. By providing a release film layer, it is possible to facilitate the process of wrapping or unwinding the patch during the production process and/or prevent damage to the patch.

The ultraviolet ray blocking patch according to an embodiment of the present invention can be manufactured according to a conventional method. For example, primer surface treatment or corona surface treatment is applied to one side of the base film having the desired elongation to strengthen the bonding strength between the foam layer and the base film. A composition containing a foaming agent is coated on one side of the surface-treated base film and aged to form a foaming layer. An adhesive layer is coated on the remaining surface of the foam layer and dried to form an adhesive layer. Afterwards, a release film is applied to one side of the adhesive layer. However, the above manufacturing method is an example of various manufacturing methods, and can be easily modified and manufactured by a person skilled in the art according to methods known in the art.

Hereinafter, the present invention will be described through specific examples. However, the following examples should not be construed as limiting the scope of the present invention.

Example 1

Manufacturing Example 1

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane as the main material, about 0.8 parts by weight of a blowing agent with a particle size of 6 to 11 μm, 1.0 parts by weight of indigo ink, and 0.6 parts by weight per 100 parts by weight of the main material. A foaming agent composition containing a leveling agent, 0.6 part by weight of an inorganic coupling agent, 0.1 part by weight of a phenolic antioxidant, and 0.1 part by weight of an epoxy curing agent is applied, one dry zone is 4 m, and 50, 70, 80, 110, 150 parts by weight are applied. , 150, 155, and 150°C, and transported at a speed of 11.5 m/min in a heat dryer divided into 8 stages to form a foam layer with a thickness of 60 μm and a porosity of 40%. Afterwards, the adhesive composition was coated on one side of the base film and one side of the foam layer, and one drying zone was 4 m long, and heat was divided into a total of eight stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. Dry in a dryer at a speed of 6 m/min to form first and second adhesive layers with a thickness of 120 μm and 127 μm, respectively, and apply first and second release film layers with a thickness of 50 μm and 75 μm, respectively. An adhesive tape with a thickness of 350 μm was prepared.

Production example 2

In Preparation Example 1, a foam layer with a thickness of 80 μm was formed by foaming while transporting at a speed of 10 m/min at the same drying temperature, and the first and second adhesive layers were transported at a speed of 7 m/min at the same drying temperature. It was prepared in the same manner as Preparation Example 1, except that it was dried and formed into thicknesses of 110 μm and 117 μm, respectively.

Production example 3

In Preparation Example 1, a foam layer with a thickness of 90 μm was formed by foaming while transporting at the same drying temperature at a speed of 9 m/min, and the first and second adhesive layers were transported at the same drying temperature at a speed of 8 m/min. It was prepared in the same manner as Preparation Example 1, except that it was dried and formed into thicknesses of 105 μm and 112 μm, respectively.

Production example 4

In Preparation Example 1, a foam layer with a thickness of 100 μm was formed by foaming while transporting at the same drying temperature at a speed of 8 m/min, and the first and second adhesive layers were transported at the same drying temperature at a speed of 9 m/min. It was prepared in the same manner as Preparation Example 1, except that it was dried and formed into thicknesses of 100 μm and 107 μm, respectively.

Production example 5

In Preparation Example 1, a foam layer with a thickness of 120 μm was formed by foaming while transporting at the same drying temperature at a speed of 7 m/min, and the first and second adhesive layers were transported at the same drying temperature at a speed of 7 m/min. It was prepared in the same manner as Preparation Example 1, except that it was dried and formed to a thickness of 90 μm and 97 μm, respectively.

Production example 6

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane as the main material, about 1.0 parts by weight of a blowing agent with a particle size of 6 to 11 μm, 1.0 parts by weight of indigo ink, and 0.6 parts by weight per 100 parts by weight of the main material. A foaming agent composition containing a leveling agent, 0.6 part by weight of an inorganic coupling agent, 0.1 part by weight of a phenolic antioxidant, and 0.1 part by weight of an epoxy curing agent is applied, one dry zone is 4 m, and 50, 70, 80, 110, 150, By transporting and foaming at a speed of 11.5 m/min in a heat dryer divided into a total of 8 stages at 150, 155, and 150°C, a foam layer with a porosity of 50% and a thickness of 60 μm was formed. Afterwards, the adhesive composition was coated on one side of the base film and one side of the foam layer, and one drying zone was 4 m long, and heat was divided into a total of eight stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. It was transported and dried in a dryer at a speed of 6 m/min to form first and second adhesive layers with a thickness of 120 μm and 127 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive layer with a thickness of 350 μm. A tape was prepared.

At this time, the thickness of the cushion was measured according to ASTM D-3652.

Production example 7

In Preparation Example 6, a foam layer with a thickness of 80 μm was formed by foaming while transporting at the same drying temperature at a speed of 10 m/min, and the first and second adhesive layers were transported at the same drying temperature at a speed of 7 m/min. It was prepared in the same manner as Preparation Example 6, except that it was dried and formed into thicknesses of 110 μm and 117 μm, respectively.

Production example 8

In Preparation Example 6, a foam layer with a thickness of 80 μm was formed by foaming while transporting at the same drying temperature at a speed of 9 m/min, and the first and second adhesive layers were transported at the same drying temperature at a speed of 8 m/min. It was prepared in the same manner as Preparation Example 6, except that it was dried and formed into thicknesses of 110 μm and 117 μm, respectively.

Production example 9

In Preparation Example 6, a foam layer with a thickness of 80 μm was formed by foaming while transporting at the same drying temperature at a speed of 8 m/min, and the first and second adhesive layers were transported at the same drying temperature at a speed of 9 m/min. It was prepared in the same manner as Preparation Example 6, except that it was dried and formed into thicknesses of 110 μm and 117 μm, respectively.

Production example 10

In Preparation Example 6, a foam layer with a thickness of 80 μm was formed by transporting and foaming at the same drying temperature at a speed of 7 m/min, and the first and second adhesive layers were formed at the same drying temperature at a speed of 9.5 m/min. It was manufactured in the same manner as Preparation Example 6, except that it was transported and dried to form thicknesses of 110 μm and 117 μm, respectively.

Production example 11

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane as the main material, about 1.2 parts by weight of a blowing agent with a particle size of 6 to 11 μm, 1.0 parts by weight of indigo ink, and 0.6 parts by weight per 100 parts by weight of the main material. A foaming agent composition containing a leveling agent, 0.6 part by weight of an inorganic coupling agent, 0.1 part by weight of a phenolic antioxidant, and 0.1 part by weight of an epoxy curing agent is applied, one dry zone is 4 m, and 50, 70, 80, 110, 150, By transporting and foaming at a speed of 11.5 m/min in a heat dryer divided into a total of 8 stages at 150, 155, and 150°C, a foam layer with a 60% porosity and a thickness of 60 μm was formed. Afterwards, the adhesive composition is coated on one side of the base film and one side of the foam layer, and one drying zone is 4 m long and is divided into a total of 8 stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. It was transported at a speed of 6 m/min and dried to form first and second adhesive layers with a thickness of 120 μm and 127 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive tape with a thickness of 350 μm. was manufactured.

Production example 12

In Preparation Example 11, a foam layer with a thickness of 80 μm was formed by foaming while transporting at a speed of 10 m/min at the same drying temperature, and the first and second adhesive layers were transported at a speed of 7 m/min at the same drying temperature. It was prepared in the same manner as Preparation Example 11, except that it was dried and formed into thicknesses of 110 μm and 117 μm, respectively.

Production Example 13

In Preparation Example 11, a foam layer with a thickness of 90 μm was formed by foaming while transporting at the same drying temperature at a speed of 9 m/min, and the first and second adhesive layers were transported at the same drying temperature at a speed of 8 m/min. It was prepared in the same manner as Preparation Example 11, except that it was dried and formed into thicknesses of 105 μm and 112 μm, respectively.

Production example 14

In Preparation Example 11, a foam layer with a thickness of 100 μm was formed by foaming while transporting at a speed of 8 m/min at the same drying temperature, and the first and second adhesive layers were transported at a speed of 9 m/min at the same drying temperature. It was prepared in the same manner as Preparation Example 11, except that it was dried and formed into thicknesses of 100 μm and 107 μm, respectively.

Production Example 15

In Preparation Example 11, a foam layer with a thickness of 120 μm was formed by transporting and foaming at the same drying temperature at a speed of 7 m/min, and the first and second adhesive layers were formed at the same drying temperature at a speed of 9.5 m/min. It was manufactured in the same manner as Preparation Example 11, except that it was transported and dried to form thicknesses of 90 μm and 97 μm, respectively.

Production example 16

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane as the main material, about 1.4 parts by weight of a blowing agent with a particle size of 6 to 11 μm, 1.0 parts by weight of indigo ink, and 0.6 parts by weight per 100 parts by weight of the main material. A foaming agent composition containing a leveling agent, 0.6 part by weight of an inorganic coupling agent, 0.1 part by weight of a phenolic antioxidant, and 0.1 part by weight of an epoxy curing agent is applied, one dry zone is 4 m, and 50, 70, 80, 110, 150, By transporting and foaming at a speed of 9 m/min in a heat dryer divided into a total of 8 stages at 150, 155, and 150°C, a foam layer with a porosity of 68% and a thickness of 90 μm was formed. Afterwards, the adhesive composition is coated on one side of the base film and one side of the foam layer, and one drying zone is 4 m long and is divided into a total of 8 stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. It was transported and dried at a speed of 8 m/min to form first and second adhesive layers with a thickness of 105 μm and 112 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive tape with a thickness of 350 μm. was manufactured.

Production Example 17

In Preparation Example 16, a foam layer with a thickness of 100 μm was formed by foaming while transporting at a speed of 8 m/min at the same drying temperature, and the first and second adhesive layers were transported at a speed of 9 m/min at the same drying temperature. It was prepared in the same manner as Preparation Example 16, except that it was dried and formed to a thickness of 100 μm and 107 μm, respectively.

Production example 18

In Preparation Example 16, a foam layer with a thickness of 120 μm was formed by transporting and foaming at the same drying temperature at a speed of 7 m/min, and the first and second adhesive layers were formed at the same drying temperature at a speed of 9.5 m/min. It was prepared in the same manner as in Preparation Example 16, except that it was transported and dried to form thicknesses of 90 μm and 97 μm, respectively.

Production Example 19

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane as the main material, about 1.4 parts by weight of a blowing agent with a particle size of 6 to 11 μm, 1.0 parts by weight of indigo ink, and 0.6 parts by weight per 100 parts by weight of the main material. A foaming agent composition comprising a leveling agent, 0.6 parts by weight of an inorganic coupling agent, 0.5 parts by weight of a phenolic antioxidant, and 0.1 part by weight of an epoxy curing agent is applied, one dry zone is 4 m, and 50, 70, 80, 110, 150, By transporting and foaming at a speed of 9 m/min in a heat dryer divided into a total of 8 stages at 150, 155, and 150°C, a foam layer with a porosity of 74% and a thickness of 90 μm was formed. Afterwards, the adhesive composition is coated on one side of the base film and one side of the foam layer, and one drying zone is 4 m long and is divided into a total of 8 stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. It was transported and dried at a speed of 8 m/min to form first and second adhesive layers with a thickness of 105 μm and 112 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive tape with a thickness of 350 μm. was manufactured.

Production example 20

In Preparation Example 19, a foam layer with a thickness of 100 μm was formed by transporting and foaming at the same drying temperature at a speed of 8 m/min, and the first and second adhesive layers were formed at the same drying temperature at a speed of 9.5 m/min. It was prepared in the same manner as Preparation Example 19, except that it was transported and dried to form thicknesses of 100 μm and 107 μm, respectively.

Production example 21

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane is used as the main material, about 1.0 parts by weight of a foaming agent with a particle size of 6 to 11 μm and about 1.0 parts by weight of 4 to 5 μm beads are added to 100 parts by weight of the main material. , 1.0 part by weight of indigo ink, 0.6 part by weight of leveling agent, 0.6 part by weight of inorganic coupling agent, and 0.1 part by weight of phenolic antioxidant are applied, one dry zone is 4M, and 50, 70, 80, 110 , 150, 150, 155, and 150°C were transported at a speed of 9 m/min in a thermal dryer divided into eight stages and foamed to form a foam layer with a thickness of 90 μm and a porosity of 50%. Afterwards, the adhesive composition is coated on one side of the base film and one side of the foam layer, and one drying zone is 4 m long and is divided into a total of 8 stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. It was transported and dried at a speed of 8 m/min to form first and second adhesive layers with a thickness of 105 μm and 112 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive tape with a thickness of 350 μm. was manufactured.

Production example 22

It was prepared in the same manner as Preparation Example 21, except that 0.1 part by weight of the epoxy curing agent was added instead of 0.1 part by weight of the phenol-based antioxidant.

Production example 23

It was prepared in the same manner as Preparation Example 21, except that 0.1 part by weight of phenol-based antioxidant was added to 0.2 parts by weight.

Manufacturing example 24

It was prepared in the same manner as Preparation Example 21, except that 0.2 parts by weight of catalyst was added instead of 0.1 part by weight of phenol-based antioxidant.

Production example 25

It was prepared in the same manner as Preparation Example 21, except that 0.1 parts by weight of the epoxy curing agent was added in Preparation Example 21.

Production example 26

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane is used as the main material, about 1.0 parts by weight of a foaming agent with a particle size of 6 to 11 μm and about 1.0 parts by weight of 4 to 5 μm beads are added to 100 parts by weight of the main material. , a foaming agent composition containing 1.0 parts by weight of indigo ink, 0.6 parts by weight of a leveling agent, 0.6 parts by weight of an inorganic coupling agent, and 0.1 parts by weight of a phenolic antioxidant is applied, one drying zone is 4 m, and 50, 70, 80, 110 , 150, 150, 155, and 150°C were transported at a speed of 9 m/min in a heat dryer divided into 8 stages and foamed to form a 100 μm thick foam layer with a porosity of 50%. Afterwards, the adhesive composition is coated on one side of the base film and one side of the foam layer, and one drying zone is 4 m long and is divided into a total of 8 stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. It was transported at a speed of 9 m/min and dried to form first and second adhesive layers with a thickness of 100 μm and 107 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive tape with a thickness of 350 μm. was manufactured.

Manufacturing Example 27

It was prepared in the same manner as Preparation Example 26, except that 0.1 part by weight of the epoxy curing agent was added instead of 0.1 part by weight of the phenol-based antioxidant.

Manufacturing example 28

It was prepared in the same manner as Preparation Example 26, except that 0.1 part by weight of phenol-based antioxidant was added in Preparation Example 26 at 0.2 parts by weight.

Manufacturing Example 29

It was prepared in the same manner as Preparation Example 26, except that 0.2 parts by weight of the epoxy curing agent was added instead of 0.1 parts by weight of the phenol-based antioxidant.

Production example 30

It was prepared in the same manner as Preparation Example 26, except that 0.1 part by weight of epoxy curing agent was added in Preparation Example 26.

Comparative Example 1

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane is used as the main material, and for 100 parts by weight of the main material, 1.0 part by weight of indigo ink, 0.6 part by weight of leveling agent, 0.6 part by weight of inorganic coupling agent, and 0.1 part by weight are added. After applying a composition containing a phenolic antioxidant and 0.1 part by weight of an epoxy curing agent, one drying zone is 4 m long and is divided into a total of 8 stages of 50, 70, 80, 110, 150, 150, 155, and 150°C. It was transported and dried in a heat dryer at a speed of 9 m/min to form a cushion layer with a thickness of 90 μm. Afterwards, the adhesive composition is coated on one side of the base film and one side of the cushion layer, and one drying zone is 4 m long and is divided into eight stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. It was transported and dried at a speed of 8 m/min to form first and second adhesive layers with a thickness of 105 μm and 112 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive tape with a thickness of 350 μm. was manufactured.

Comparative Example 2

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane is used as the main material, and for 100 parts by weight of the main material, 1.0 part by weight of indigo ink, 0.6 part by weight of leveling agent, 0.6 part by weight of inorganic coupling agent, and 0.1 part by weight are added. After applying a composition containing a phenolic antioxidant and 0.1 part by weight of an epoxy curing agent, one drying zone is 4 m long and is divided into a total of 8 stages of 50, 70, 80, 110, 150, 150, 155, and 150°C. It was transported and dried in a heat dryer at a speed of 8 m/min to form a cushion layer with a thickness of 100 μm. Afterwards, the adhesive composition was coated on one side of the base film and one side of the cushion layer, and one drying zone was divided into eight stages of heat at 60, 70, 75, 100, 120, 140, 145, and 140°C in a 4m dryer. It was transported and dried in a dryer at a speed of 9 m/min to form first and second adhesive layers with a thickness of 100 μm and 107 μm, respectively, and a release film layer with a thickness of 50 μm and 75 μm was applied to form an adhesive layer with a thickness of 350 μm. A tape was prepared.

Comparative Example 3

An adhesive composition is coated on one side of a surface-treated base film with a thickness of 43 μm, and one drying zone is 4 m and has 60, 70, 75, 100, 120, 140, 145, It is transported and dried in a heat dryer divided into a total of 8 stages at 140°C at a speed of 3.5 m/min to form first and second adhesive layers with a thickness of 150 μm and 157 μm, respectively, and 50 μm and 75 μm thick. A release film layer was applied to prepare an adhesive tape with a thickness of 350 μm.

Specific details regarding the foaming agent compositions according to Preparation Examples 1 to 30 and Comparative Examples 1 to 3 are shown in Tables 1 to 7, and the structures of the films prepared according to Preparation Examples 1 to 30 and Comparative Examples 1 to 3 are shown in Tables 8 to 3. It is described in 14.

Manufacturing Example 1 Production example 2 Production example 3 Production example 4 Production example 5 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (㎛) blowing agent Content (parts by weight) 0.8 0.8 0.8 0.8 0.8 Particle size (㎛) 6~11 6~11 6~11 6~11 6~11 Foaming rate (%) 140 140 140 140 140 Cushion thickness Thickness (㎛) 60 80 90 100 120 Porosity (%) 40 40 40 40 40 navy ink Content (parts by weight) One One One One One Additives (parts by weight) leveling agent
(polysiloxane) 0.6 0.6 0.6 0.6 0.6 Inorganic coupling agent
(Epoxy silane coupling agent) 0.6 0.6 0.6 0.6 0.6 Phenol-based antioxidant (pentaerythritol tetrakis propionate) 0.1 0.1 0.1 0.1 0.1 epoxy hardener 0.1 0.1 0.1 0.1 0.1

*Content (parts by weight) is based on 100 parts by weight of the main material of the blowing agent composition.

Production example 6 Production example 7 Production example 8 Production example 9 Production example 10 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (㎛) blowing agent Content (parts by weight) One One One One One Particle size (㎛) 6~11 6~11 6~11 6~11 6~11 Foaming rate (%) 160 160 160 160 160 Cushion thickness Thickness (㎛) 60 80 90 100 120 Porosity (%) 50 50 50 50 50 navy ink Content (parts by weight) One One One One One Additives (parts by weight) leveling agent
(polysiloxane) 0.6 0.6 0.6 0.6 0.6 Inorganic coupling agent
(Epoxy silane coupling agent) 0.6 0.6 0.6 0.6 0.6 Phenol-based antioxidant (pentaerythritol tetrakis propionate) 0.1 0.1 0.1 0.1 0.1 epoxy hardener 0.1 0.1 0.1 0.1 0.1

*Content (parts by weight) is based on 100 parts by weight of the main material of the blowing agent composition.

Production example 11 Production example 12 Production Example 13 Production example 14 Production Example 15 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (㎛) blowing agent Content (parts by weight) 1.2 1.2 1.2 1.2 1.2 Particle size (㎛) 6~11 6~11 6~11 6~11 6~11 Foaming rate (%) 180 180 180 180 180 Cushion thickness Thickness (㎛) 60 80 90 100 120 Porosity (%) 60 60 60 60 60 navy ink Content (parts by weight) One One One One One Additives (parts by weight) leveling agent
(polysiloxane) 0.6 0.6 0.6 0.6 0.6 Inorganic coupling agent
(Epoxy silane coupling agent) 0.6 0.6 0.6 0.6 0.6 Phenol-based antioxidant (pentaerythritol tetrakis propionate) 0.1 0.1 0.1 0.1 0.1 epoxy hardener 0.1 0.1 0.1 0.1 0.1

*Content (parts by weight) is based on 100 parts by weight of the main material of the blowing agent composition.

Production example 16 Production Example 17 Production example 18 Production Example 19 Production example 20 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (㎛) blowing agent Content (parts by weight) 1.4 1.4 1.4 1.4 1.4 Particle size (㎛) 6~11 6~11 6~11 6~11 6~11 Foaming rate (%) 200 200 200 200 200 Cushion thickness Thickness (㎛) 90 100 120 90 100 Porosity (parts by weight) 68 68 68 74 74 navy ink content(%) One One One One One Additives (parts by weight) leveling agent
(polysiloxane) 0.6 0.6 0.6 0.6 0.6 Inorganic coupling agent
(Epoxy silane coupling agent) 0.6 0.6 0.6 0.6 0.6 Phenol-based antioxidant (pentaerythritol tetrakis propionate) 0.1 0.1 0.1 0.5 0.5 epoxy hardener 0.1 0.1 0.1 0.1 0.1

*Content (parts by weight) is based on 100 parts by weight of the main material of the blowing agent composition.

Production example 21 Production example 22 Production example 23 Manufacturing example 24 Production example 25 Beads (PU particles coated with carbon black) Content (parts by weight)* One One One One One Particle size (㎛) 4~5 4~5 4~5 4~5 4~5 blowing agent Content (parts by weight) One One One One One Particle size (㎛) Foaming rate (%) 160 160 160 160 160 Cushion thickness Thickness (㎛) 90 90 90 90 90 Porosity (parts by weight) 50 50 50 50 50 navy ink content(%) One One One One One Additives (parts by weight) leveling agent
(polysiloxane) 0.6 0.6 0.6 0.6 0.6 Inorganic coupling agent
(Epoxy silane coupling agent) 0.6 0.6 0.6 0.6 0.6 Phenol-based antioxidant (pentaerythritol tetrakis propionate) 0.1 0.2 0.1 epoxy hardener 0.1 0.2 0.1

*Content (parts by weight) is based on 100 parts by weight of the main material of the blowing agent composition.

Production example 26 Manufacturing Example 27 Manufacturing example 28 Manufacturing Example 29 Production example 30 Beads (PU particles coated with carbon black) Content (parts by weight)* One One One One One Particle size (㎛) 4~5 4~5 4~5 4~5 4~5 blowing agent Content (parts by weight) One One One One One Particle size (㎛) 6~11 6~11 6~11 6~11 6~11 Foaming rate (%) 160 160 160 160 160 Cushion thickness Thickness (㎛) 100 100 100 100 100 Porosity (%) 50 50 50 50 50 navy ink Content (parts by weight) One One One One One Additives (parts by weight) leveling agent
(polysiloxane) 0.6 0.6 0.6 0.6 0.6 Inorganic coupling agent
(Epoxy silane coupling agent) 0.6 0.6 0.6 0.6 0.6 Phenol-based antioxidant (pentaerythritol tetrakis propionate) 0.1 0.2 0.1 epoxy hardener 0.1 0.2 0.1

*Content (parts by weight) is based on 100 parts by weight of the main material of the blowing agent composition.

Comparative Example 1 Comparative Example 2 Comparative Example 3 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (㎛) blowing agent Content (parts by weight) Particle size (㎛) Foaming rate (%) Cushion thickness Thickness (㎛) 90 100 0 Porosity (%) 50 50 0 navy ink Content (parts by weight) One One Additives (parts by weight) leveling agent
(polysiloxane) 0.6 0.6 Inorganic coupling agent
(Epoxy silane coupling agent) 0.6 0.6 Phenol-based antioxidant (pentaerythritol tetrakis propionate) 0.1 0.1 epoxy hardener 0.1 0.1

*Content (parts by weight) is based on 100 parts by weight of the main material of the blowing agent composition.

structure
(㎛) Manufacturing Example 1 Production example 2 Production example 3 Production example 4 Production example 5 Release film layer 50 50 50 50 50 Adhesive layer 120 110 105 100 90 cushion layer 60 80 90 100 120 base layer 43 43 43 43 43 Adhesive layer 127 117 112 107 97 Release film layer 75 75 75 75 75 total thickness 350 350 350 350 350

structure
(㎛) Production example 6 Production example 7 Production example 8 Production example 9 Production example 10 Release film layer 50 50 50 50 50 Adhesive layer 120 110 105 100 90 cushion layer 60 80 90 100 120 base layer 43 43 43 43 43 Adhesive layer 127 117 112 107 97 Release film layer 75 75 75 75 75 total thickness 350 350 350 350 350

structure
(㎛) Production example 11 Production example 12 Production Example 13 Production example 14 Production Example 15 Release film layer 50 50 50 50 50 Adhesive layer 120 110 105 100 90 cushion layer 60 80 90 100 120 base layer 43 43 43 43 43 Adhesive layer 127 117 112 107 97 Release film layer 75 75 75 75 75 total thickness 350 350 350 350 350

structure
(㎛) Production example 16 Production Example 17 Production Example 18 Production Example 19 Production example 20 Release film layer 50 50 50 50 50 Adhesive layer 105 100 90 105 100 cushion layer 90 100 120 90 100 base layer 43 43 43 43 43 Adhesive layer 112 107 97 112 107 Release film layer 75 75 75 75 75 total thickness 350 350 350 350 350

structure
(㎛) Production example 21 Production example 22 Production example 23 Manufacturing example 24 Production example 25 Release film layer 50 50 50 50 50 Adhesive layer 105 105 105 105 105 cushion layer 90 90 90 90 90 base layer 43 43 43 43 43 Adhesive layer 112 112 112 112 112 Release film layer 75 75 75 75 75 total thickness 350 350 350 350 350

structure
(㎛) Production example 26 Manufacturing Example 27 Manufacturing Example 28 Manufacturing Example 29 Production example 30 Release film layer 50 50 50 50 50 Adhesive layer 100 100 100 100 100 cushion layer 100 100 100 100 100 base layer 43 43 43 43 43 Adhesive layer 107 107 107 107 107 Release film layer 75 75 75 75 75 total thickness 350 350 350 350 350

structure
(㎛) Comparative Example 1 Comparative Example 2 Comparative Example 3 Release film layer 50 50 50 Adhesive layer 105 100 150 cushion layer 90 100 0 base layer 43 43 43 Adhesive layer 112 107 157 Release film layer 75 75 75 total thickness 350 350 350

Experimental Example 1

The adhesion of the SUS adherend was measured according to ASTM-D3330, and the results are shown in Table 15 below.

Adhesion (gf/in) Adhesion (gf/in) Adhesion (gf/in) Manufacturing Example 1 3,400 Production example 12 3,500 Production example 23 3,500 Production example 2 3,400 Production Example 13 3,500 Manufacturing example 24 3,500 Production example 3 3,400 Production example 14 3,500 Production example 25 3,500 Production example 4 3,400 Production Example 15 3,400 Production example 26 3,500 Production example 5 3,400 Production example 16 3,400 Manufacturing Example 27 3,500 Production example 6 3,400 Production Example 17 3,400 Manufacturing example 28 3,500 Production example 7 3,500 Production Example 18 3,500 Manufacturing Example 29 3,500 Production example 8 3,500 Production example 19 3,500 Production example 30 3,500 Production example 9 3,500 Production example 20 3,400 Comparative Example 1 2,800 Production example 10 3,400 Production example 21 3,500 Comparative Example 2 2,800 Production example 11 3,400 Production example 22 3,500 Comparative Example 3 2,900

As shown in Table 15, it was confirmed that even when adhesives of the same composition were used, the adhesive strength was relatively low in the absence of a foam layer.

Experimental Example 2

The impact strength was measured three times repeatedly according to ASTM D1794, and the average values of the results are listed in Table 16.

Impact intensity (mJ) Impact intensity (mJ) Impact intensity (mJ) Manufacturing Example 1 112 Production example 12 256 Production example 23 288 Production example 2 168 Production Example 13 296 Manufacturing example 24 312 Production example 3 176 Production example 14 304 Production example 25 336 Production example 4 200 Production Example 15 312 Production example 26 280 Production example 5 208 Production example 16 288 Manufacturing Example 27 280 Production example 6 160 Production Example 17 296 Manufacturing example 28 288 Production example 7 224 Production Example 18 288 Manufacturing Example 29 312 Production example 8 312 Production example 19 256 Production example 30 312 Production example 9 336 Production example 20 272 Comparative Example 1 96 Production example 10 312 Production example 21 272 Comparative Example 2 80 Production example 11 200 Production example 22 280 Comparative Example 3 40

As shown in Table 16 above, in the case of Comparative Examples 1 to 3 without the foam layer, the impact strength was less than 100 mJ. On the other hand, in the case of a foam layer of the same thickness, the higher the foam rate and/or the higher the porosity, the higher the impact strength, and in the case of a foam layer of the same thickness, a foam layer with a porosity of 68% has a porosity of 74%. It was found to have higher impact strength compared to the foam layer.

Example 2

Production example 31

On one side of the surface-treated base film with a thickness of 43 μm, polyurethane as the main material, 0.8 parts by weight of a blowing agent with a particle size of 6 to 11 μm, 1 part by weight of oxybenzone, and 1.0 parts by weight based on 100 parts by weight of the main material are added. A foaming agent composition containing indigo ink, 0.6 part by weight of a leveling agent, 0.6 part by weight of an inorganic coupling agent, 0.1 part by weight of a phenolic antioxidant, and 0.1 part by weight of an epoxy curing agent is applied, one dry zone is 4 m, 50, 70, A foam layer with a thickness of 80 μm and a porosity of 50% was formed by transporting and foaming at a speed of 10 m/min in a heat dryer divided into eight stages of 80, 110, 150, 150, 155, and 150°C. Afterwards, the adhesive composition is coated on one side of the foam layer and dried at 7 m/min in a heat dryer with one drying zone of 4 m and divided into 8 stages of 60, 70, 75, 100, 120, 140, 145, and 140°C. A 110 μm thick adhesive layer was formed by moving and drying at a speed of , and a 50 μm thick release film layer was applied to prepare an adhesive tape with a thickness of 283 μm.

Production example 32

It was prepared in the same manner as Preparation Example 31, except that 1.5 parts by weight of oxybenzone was added in Preparation Example 31.

Production example 33

It was prepared in the same manner as Preparation Example 31, except that 2 parts by weight of oxybenzone was added.

Production example 34

It was prepared in the same manner as Preparation Example 31, except that 2.5 parts by weight of oxybenzone was added in Preparation Example 31.

Production example 35

It was prepared in the same manner as Preparation Example 31, except that 3 parts by weight of oxybenzone was added in Preparation Example 31.

Production example 36

It was prepared in the same manner as Preparation Example 31, except that 1 part by weight of zinc oxide was added instead of oxybenzone.

Production example 37

It was prepared in the same manner as Preparation Example 31, except that 1.2 parts by weight of carbon black was added instead of oxybenzone.

Experimental Example 3

The adhesion of the SUS adherend was measured according to ASTM-D3330, and the results are shown in Table 17 below.

Manufacturing Example 1 Production example 2 Production example 3 Production example 4 Production example 5 Adhesion (gf/in) 3,400 3,400 3,400 3,400 3,400

1 is a cross-sectional view of an ultraviolet ray blocking patch according to an embodiment of the present invention.

Referring to FIG. 1, the ultraviolet ray blocking patch may include a base film layer 100, a foam layer 200, an adhesive layer 300, and a release film layer 400.

The base film layer 100, the foam layer 200, the adhesive layer 300, and the release film layer 400 are each the base film layer, foam layer, adhesive layer, and release film described in the above embodiments. It is substantially the same as the layer, and repeated descriptions are omitted.

Figure 2 is a diagram showing various examples of use of ultraviolet ray blocking patches according to embodiments of the present invention.

Referring to (a) to (c) of FIG. 2, the ultraviolet ray blocking patch 10 can be directly attached to human skin that requires ultraviolet ray blocking, such as the face. The ultraviolet ray blocking patch 10 has excellent elasticity and adhesion while also having a ultraviolet ray blocking effect and hypoallergenic properties to the skin, so it can be attached to the curved skin of the human body in various forms. For example, the patch 10 may be formed with an opening 12 for the mouth or nose, or an incision line 14 corresponding to a curve of the adhesive surface. (See (c) in Figure 2)

For claim construction purposes, the claims set forth below should not be construed in any way narrower than their literal language, and therefore exemplary embodiments from the specification should not be read as claims. Accordingly, it should be understood that the present invention has been described by way of example and not as a limitation on the scope of the claims. Accordingly, the invention is limited only by the following claims. All publications, issued patents, patent applications, books and journal articles cited in this application are each hereby incorporated by reference in their entirety.

100: base film layer 200: foam layer
300: Adhesive layer 400: Release film layer

Claims (8)

In the UV-blocking patch in which a base film layer, a foam layer, an adhesive layer, and a release film layer are sequentially laminated,
The UV-blocking patch has a higher adhesive force compared to an adhesive film without a foam layer, the foam layer includes a UV blocker, and the foam layer has the following characteristics (i) to (iii):
(i) an expansion rate of 160% to 200%,
(ii) a porosity of 50% to 74%, and
(iii) a thickness of 80 μm to 120 μm,
The foaming rate (R _E ) is

R _E : foaming rate
T _f : Thickness of foam layer after foaming
T ₀ : Thickness of the foam layer before foaming,
The porosity (ϕ) is

ϕ: porosity
V: Total volume of foam layer
V _v : volume of voids
V _s : Volume of solid outside the pores
am.
The UV blocking patch according to claim 1, wherein the adhesive film has an adhesive strength increased by more than 20% compared to an adhesive film without a foam layer.
The UV protection patch according to claim 1 or 2, wherein the foam layer contains a phenol-based antioxidant and an epoxy curing agent in a ratio of 1:1.
The sunscreen patch according to claim 1 or 2, wherein the UV blocker is oxybenzone, zinc oxide, or carbon black.
A foaming agent composition is applied to one side of the base film and foamed so that the foaming rate is 160% to 200%, the porosity is 50% to 74%, and the thickness of the foam layer is 80 μm to 120 μm to form a foam layer on one side of the base film. forming a;
A method of manufacturing a UV-blocking patch, comprising the step of applying an adhesive composition to one side of the foam layer that is not in contact with the base film and drying it to form an adhesive layer, wherein the foam layer includes a UV blocker:
The foaming rate (R _E ) is

R _E : foaming rate
T _f : Thickness of foam layer after foaming
T ₀ : Thickness of the foam layer before foaming,
The porosity (ϕ) is

ϕ: porosity
V: Total volume of foam layer
V _v : volume of voids
V _s : Volume of solid outside the pores
am.
The method of claim 5, wherein the foam layer includes a phenol-based antioxidant and an epoxy curing agent in a ratio of 1:1.
The method of claim 5, further comprising applying a release film layer to one surface of the adhesive layer that is not in contact with the foam layer.
8. The method of any one of claims 5 to 7, wherein the UV blocker is oxybenzone, zinc oxide, or carbon black.