KR20220009767A - Body protection with adhesive film and method of manufacturing the same - Google Patents

Abstract

A body protection device comprises: an outer shell formed with at least partially curved; an inner shell disposed inside the outer shell; and an adhesive film disposed between the outer shell and the inner shell to adhere the inner shell to the outer shell. The adhesive film comprises: a first adhesive layer attached to the inner shell; a first foam layer disposed on the first adhesive layer; and a second adhesive layer disposed on the first foam layer and attached to the outer shell. Therefore, the present invention is capable of improving a performance of adhesion.

Description

Body protection with adhesive film and method of manufacturing the same

The present invention relates to a body protector comprising an adhesive film and a method for manufacturing the body protector, and more particularly, to a body protector comprising an adhesive film having improved shock absorption function and adhesive performance, and a method for manufacturing the body protector .

The body protector for protecting the body includes an outer skin made of a hard material that primarily absorbs external shocks, an endothelium attached to the outer skin, and contacting the wearer's body.

Accordingly, body protection equipment such as a hard hat with an emphasis on shock absorption is being developed. At this time, in order to attach the endothelium for absorbing the shock to the inside of the outer skin, a structure for adhering using an adhesive, an adhesive, etc. is disclosed, but when the external impact is repeated, the adhesive strength of the adhesive or the adhesive portion is weakened, so that the endothelium is separated from the outer skin Deviations happen often.

Republic of Korea Patent Publication No. 10-1417584

Accordingly, the technical problem of the present invention has been conceived in this respect, and an object of the present invention is to provide a body protector comprising an adhesive film having improved shock absorption function and adhesive performance.

Another object of the present invention is to provide a method for manufacturing the body protector with improved manufacturing efficiency and improved quality.

The body protector according to an embodiment for realizing the object of the present invention is disposed between the outer skin at least partly curved, the endothelium disposed inside the outer skin, and the outer skin and the endothelium, wherein the endothelium is the outer skin It includes an adhesive film to adhere to. The adhesive film includes a first adhesive layer attached to the endothelium, a first foam layer disposed on the first adhesive layer, and a second adhesive layer disposed on the first foam layer and attached to the outer skin.

In one embodiment of the present invention, the first foaming layer may have one or more of the following characteristics (i) or (ii).

(i) a foaming rate of 140% to 200%,

(ii) a porosity of 40% to 74%,

The foaming ratio (RE) may satisfy Equation 1 below.

<Equation 1>

(here, _RE : foaming rate, T _f : thickness of the foaming layer after foaming, T ₀ : thickness of the foaming layer before foaming)

The porosity φ may satisfy Equation 2 below.

<Equation 2>

(here, φ: porosity, V: total volume of the foam layer, Vv: volume of pores, Vs: volume of solid outside the pores)

In one embodiment of the present invention, the adhesive film may further include a first base layer in contact with the first foam layer. The first base layer may include thermoplastic polyurethane (TPU).

In one embodiment of the present invention, further comprising a second foaming layer in contact with the second adhesive layer,

The second foam layer has at least one of the following characteristics (i) or (ii),

(i) a foaming rate of 140% to 200%,

(ii) a porosity of 40% to 74%.

In one embodiment of the present invention, the adhesive film may be formed to correspond to the same area as the inner surface of the outer shell.

In an embodiment of the present invention, the adhesive film may include a plurality of adhesive patterns spaced apart from each other.

In one embodiment of the present invention, the shell may be formed of any one of plastic, fiber-reinforced plastic, acrylnitrile butadiene styrene, and polystyrene. The endothelium may be formed of any one of sponge, styrofoam, rubber, and ethylene vinyl acetate copolymer (EVA).

In one embodiment of the present invention, the shell may include a head portion, a chin portion and a window portion positioned between the head portion and the chin portion. The endothelium may include a first portion attached to the inside of the head and a second portion spaced apart from the first portion and attached to the inside of the chin. The adhesive film may include a first adhesive pattern positioned between the head and the first part and a second adhesive pattern positioned between the chin part and the first part.

In an embodiment of the present invention, the body protector may further include a strap connected to the outer skin or endothelium.

A method of manufacturing a body protector according to an embodiment for realizing the object of the present invention includes the steps of preparing an outer skin and an endothelium, forming an adhesive film, attaching the adhesive film to the endothelium or outer skin, and and attaching the outer skin and the endothelium to each other using the adhesive film. The adhesive film forming step is performed by applying a foaming agent composition to one surface of the base layer and foaming so that the foaming rate is 140% to 200%, the porosity is 40% to 74%, or a combination thereof, and the foaming layer is on one surface of the base layer. and forming an adhesive layer by applying an adhesive composition to one surface of the foam layer and one surface of the base layer that are not in contact with the base layer and the foam layer, and drying.

In an embodiment of the present invention, the step of forming the adhesive film may further include applying a first release film and a second release film on the adhesive layers on both surfaces of the adhesive film. The first release film may be removed before the step of attaching the adhesive film, and the second release film may be removed before the step of attaching the outer shell and the endothelium to each other.

According to embodiments of the present invention, the body protector includes an adhesive film having a high elongation and improved adhesive performance. Accordingly, the inner skin including the curved surface inside the outer shell including the curved surface can be simply attached using the adhesive film, which is a double-sided adhesive tape, without going through a separate process such as applying an adhesive, and the adhesive film has an elongation High, since the adhesive performance is improved, when using the body protector, the outer shell and the endothelium do not separate from each other even after repeated external shocks, and may be firmly coupled.

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

1 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.
2 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.
3 is a cross-sectional view of a body protector according to an embodiment of the present invention.
4 is a cross-sectional view for explaining a laminated structure of an adhesive film of a body protector according to embodiments of the present invention.
5 is a cross-sectional view for explaining a laminated structure of an adhesive film of a body protector according to embodiments of the present invention.
6 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.
7 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.
8 is a flowchart illustrating a method of manufacturing a body protector according to an embodiment 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 have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In the present specification, “about” is used to indicate that a given value may vary within an error range, and is generally recognized as a level of ±5%. As used herein, “about” is used inevitably due to the presence of measurement errors, and those skilled in the art will be able to clearly understand the meaning.

In the present specification, the range of values indicated by “to” or “to” is deemed to be disclosed in the present specification of all values within the range.

1 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.

Specifically, Fig. 1 (a) is a perspective view of the body protector, Fig. 1 (b) is a side cross-sectional view of the body protector, Figure 1 (c) is a front sectional view of the body protector.

Referring to FIG. 1 , the body protection device may be a safety helmet worn on the head to protect the head by minimizing the shock transmitted to the head when various objects collide with the worker's head in various industrial sites such as factories or construction sites. have.

The body protector may include an outer shell 200, an endothelium 300, and an adhesive film disposed between the outer shell 200 and the endothelium to adhere the endothelium 300 to the outer shell 200. . The adhesive film may include a plurality of adhesive patterns 100 .

The outer shell 200 may be formed in a hemispherical curved surface according to the shape of the user's head. The outer shell 200 functions to primarily protect the user's head from external impact, and may have a hard material to protect the user from hard and sharp edges. For example, the shell 200 may be formed of plastic, fiber-reinforced plastic, acrylnitrile-butadiene styrene, polystyrene, or the like.

The endothelium 300 is located inside the shell 200 and is a part in contact with the user's head, and by attenuating the shock transmitted through the shell 200, a function of secondary protection of the user's head. can do. The endothelium 300 may have an outer surface corresponding to the inner surface of the outer skin 200, and the endothelium 300 may also include a curved surface. The endothelium 300 is a portion in contact with the user's head and may be formed of a soft elastic or plastic material. For example, the endothelium 300 may be formed of a sponge, styrofoam, rubber, ethylene vinyl acetate copolymer (EVA), or the like.

The adhesive pattern 100 may be a double-sided adhesive tape having a plurality of layered structures. For example, the adhesive pattern 100 may be in the form of a circular double-sided tape. The layered structure will be described in detail with reference to FIG. 4 . In this case, as will be described later, the adhesive pattern 100 may be an adhesive film having a high elongation and improved adhesive performance. Accordingly, the inner shell 300 including the curved surface inside the outer shell 200 including the curved surface can be attached simply using a double-sided adhesive tape without going through a process such as applying an adhesive, and the adhesive Since the film has a high elongation and improved adhesive performance, when using the body protector, the outer shell 200 and the inner shell 300 do not separate from each other even after repeated external impacts, and may be firmly coupled.

2 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.

Specifically, Figure 2 (a) is a perspective view of the body protector, Figure 2 (b) is a front cross-sectional view of the body protector.

Referring to FIG. 2 , the body protection device may be a full-face helmet worn by a occupant for safety in driving a two-wheeled vehicle or the like.

The body protector may include an outer skin 200 , an endothelium, and an adhesive film disposed between the outer skin 200 and the endothelium 300 to adhere the endothelium to the outer skin 200 . The adhesive film may include a plurality of adhesive patterns 100 .

The shell 200 may include a head 200a for protecting the head and a chin 200b for protecting the chin. The head and the chin may be integrally formed to constitute a full-face helmet. The body protector may further include a window part WS formed between the head part 200a and the chin part 200b. The shell 200 may be formed of plastic, fiber-reinforced plastic, acrylnitrile butadiene styrene, polystyrene, or the like.

The endothelium includes a first portion 310 attached to the inner side of the head portion 200a and a second portion 320 spaced apart from the first portion 310 and attached to the inner side of the chin portion 200b. can do. The first part 310 and the second part 320 may be spaced apart from each other, and may be attached to the outer shell 200 by different adhesive films. The endothelium may be formed of a sponge, styrofoam, rubber, ethylene vinyl acetate copolymer (EVA), or the like.

The adhesive film may include a plurality of adhesive patterns 100 . The adhesive pattern 100 may be a double-sided adhesive tape having a plurality of layered structures. For example, the adhesive pattern 100 may be in the form of a circular double-sided tape. The adhesive pattern 100 includes a first adhesive pattern positioned between the head 200a and the first part 310 and a second adhesive pattern positioned between the jaw part 200a and the first part 320 . It may include patterns.

Accordingly, the inner shell 300 including the curved surface inside the outer shell 200 including the curved surface can be attached simply using a double-sided adhesive tape without going through a process such as applying an adhesive, and the adhesive Since the film has a high elongation and improved adhesive performance, when using the body protector, the outer shell 200 and the inner shell 300 do not separate from each other even after repeated external impacts, and may be firmly coupled.

3 is a cross-sectional view of a body protector according to an embodiment of the present invention.

Referring to (a) of Figure 3, the body protector is disposed between the outer shell 200, the endothelium 300, and the outer shell 200 and the endothelium 300, the endothelium 300, the outer shell 200 It may include an adhesive film 100 to adhere to.

The adhesive film 100 may be a double-sided adhesive tape having a plurality of layered structures. The adhesive film 100 may be an adhesive film having a high elongation and improved adhesive performance. Accordingly, it may be formed to correspond to the entire inner surface of the outer surface and the outer surface of the outer shell 200 of the endothelium 300, which is a curved surface, and thus the adhesive film 100 may form a curved surface in three dimensions. That is, the adhesive film 100 may be formed to correspond to the same area as the inner surface of the outer shell 200 .

Since the adhesive film 100 has a high elongation and improved adhesive performance, when using the body protector, the outer shell 200 and the endothelium 300 do not separate from each other even after repeated external impacts, and are firmly coupled can

Referring to FIG. 3B , the body protector may include an outer skin 200 and an adhesive film 100 attached to the inside of the outer skin 200 .

The adhesive film 100 has a layered structure including a foaming layer, and the layered structure will be described in detail with reference to FIG. 5 . The adhesive film 100 may be an adhesive film having a high elongation and improved adhesive performance. Accordingly, it may be formed to correspond to the entire inner surface of the outer shell 200, which is a curved surface, and accordingly, the adhesive film 100 may form a curved surface in three dimensions. That is, the adhesive film 100 may be formed to correspond to the same area as the inner surface of the outer shell 200 .

Since the adhesive film 100 itself has a shock absorbing function and improved adhesive performance, even without a separate endothelium, just attaching the adhesive film 100 to the inside of the outer shell 200 is sufficient to provide a sufficient impact to the body protection equipment. Absorption function can be given.

Referring to (c) of FIG. 3 , the body protector may include an outer shell 200 and an adhesive film attached to the inner side of the outer shell 200 . The adhesive film may include a plurality of adhesive patterns 100 . The body protection equipment is substantially the same as the body protection equipment described in (b) of FIG. 3 , except for the adhesive pattern 100 , and thus repeated description will be omitted.

4 is a cross-sectional view for explaining a laminated structure of an adhesive film of a body protector according to embodiments of the present invention.

Referring to FIG. 4A , the adhesive film includes an adhesive layer (PSA). The adhesive layer (PSA) may be an optical clear adhesive (OCA) film having a transparent adhesive function. The adhesive layer PSA may include an adhesive, and thus may have a predetermined elasticity.

Referring to FIG. 4B , the adhesive film includes a first adhesive layer (PSA1), a foaming layer (CU), and a second adhesive layer (PSA2). The foam layer CU may be disposed between the first adhesive layer PSA1 and the second adhesive layer PSA2. The thickness of the first adhesive layer, the foaming layer, the base layer, and the second adhesive layer may be appropriately selected as needed. Since the characteristics of each layer are substantially the same as those of the layers described in FIG. 4C , a detailed description will be given later in FIG. 4C .

The adhesive layer according to the present embodiment has improved adhesion and high elongation compared to a generally used double-sided tape, and also has excellent impact strength. For example, as in the embodiment of FIG. 4A , compared to an adhesive film composed of only an adhesive layer, the adhesive strength, elongation, and impact strength may be improved by the laminated structure. Accordingly, in being used for body protection equipment frequently exposed to external shocks, manufacturing efficiency may be improved, and the quality of the body protection equipment may be improved.

Referring to FIG. 4C , the adhesive film includes a first adhesive layer PSA1, a base layer BS, a foam layer CU, and a second adhesive layer PSA2. In the drawings, the first adhesive layer (PSA1), the base layer (BS), the foam layer (CU), and the second adhesive layer (PSA2) are sequentially stacked, but the present invention is not limited thereto. For example, the foam layer CU, the base layer BS, and the second adhesive layer PSA2 may be sequentially stacked on the first adhesive layer PSA1.

The thickness of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer may be appropriately selected as needed, for example, the thickness of the first adhesive layer is 135 μm, and the thickness of the base layer is 80 μm. , the thickness of the foam layer may be 160 μm, and the thickness of the second adhesive layer may be 125 μm.

In one embodiment of the present invention, the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base 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, the foam layer, the base layer, and the 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 (not shown), from about 10% to about 15%, and from about 25% to about 32%. In the present invention, the thickness was measured according to ASTM D-3652.

More specifically, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer is about 160 μm in an embodiment of the present invention, the first adhesive layer, the foam layer, the base layer, and the second The thickness of the adhesive layer is 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 an embodiment of the present invention, when the adhesive film thickness composed of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer is about 210 μm, the thickness of the first adhesive layer, the foam layer, the base layer, and the second 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%, respectively. In an embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer is about 260 μm, the thickness of the first adhesive layer, the foam layer, the base layer, and the second 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 an embodiment of the present invention, when the adhesive film thickness consisting of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer is about 310 μm, the thickness of the first adhesive layer, the foam layer, the base layer, and the second 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%, respectively. In an embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer is about 360 μm, the thickness of the first adhesive layer, the foam layer, the base layer, and the second 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%, respectively. In an embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer is about 410 μm, the thickness of the first adhesive layer, the foam layer, the base layer, and the second 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%, respectively. In an embodiment of the present invention, when the thickness of the adhesive film composed of the first adhesive layer, the foam layer, the base layer, and the second adhesive layer is about 510 μm, the thickness of the first adhesive layer, the foam layer, the base layer, and the second 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%, respectively.

In an embodiment of the present invention, the first adhesive layer and the second adhesive layer may include the same component 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-based adhesives; urethane adhesive; polyester adhesive; polyolefin-based adhesives; polyvinyl alkyl ether adhesive; rubber-based adhesives; vinyl chloride-vinyl acetate-based adhesive; styrene-butadiene-styrene (SBS) adhesives; styrene-butadiene-styrene (SEBS)-based adhesives; ethylene-based adhesives; 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 an acrylic adhesive, an epoxy adhesive, and a silicone adhesive.

In an embodiment of the present invention, the acrylic adhesive includes at least one acrylic polymer, and the acrylic polymer comprises, for example, a polymerization unit derived from a (meth)acrylic acid ester compound such as alkyl (meth)acrylate. may include, but is not limited to. In another embodiment of the present 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 ( meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, lauryl (meth)acrylate or tetradecyl (meth)acrylate, or a combination thereof.

In an 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, a compound having a plurality of epoxy groups is called polyepoxide, and polyepoxide is a compound containing an epoxy group at the terminal, such as diglycidyl ether of polyoxyalkylene glycol, and a backbone such as polybutadiene polyepoxide. polymers having oxirane units within it, and polymers having an epoxy moiety, such as glycidyl methacrylate polymers or copolymers. In an embodiment of the present invention, the epoxy compound may be a saturated or unsaturated, aliphatic, cycloaliphatic, aromatic, or heterocyclic compound, and may be substituted or unsubstituted, and may be a monomer or a polymer.

Epoxy compounds are commercially available, for example, 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 polyglycidyl ether of phenol-formaldehyde novolac.

The adhesive used in an embodiment of the present invention is a pressure sensitive adhesive (PSA), the molecular weight is about 700000 to about 800000, and the glass transition temperature (Tg) is about -25 ℃ to about -20 ℃ polymer was used.

In an embodiment of the present invention, the solvent used for the first or second adhesive layer is n-methylpyrrolidone (NMP), dimethyl sulfoxide (DMSO), ethyl lactate ethyl acetate, butyl acetate, methyl ethyl ketone ( MEK), propylene glycol ethylene acetate (PGMEA), toluene, xylene, acetone, cyclopentenone, tetrahydrofuran (THF), dimethyl acetamide, hydrocarbon, cyclohexanone, or ether, but is not limited thereto. , as long as it can keep the components in a solution in a stable, homogeneous or dispersed state for a desired period of time can be used.

The foaming agent to be used may be selected by a person skilled in the art in consideration of the type of foam to be formed, vapor pressure, ease of use, and/or solubility with respect to the polymer used.

The foaming layer in the adhesive film according to an embodiment of the present invention may be prepared using a physical foaming agent or a chemical foaming agent. A case of using a gas as the blowing agent is called a physical blowing agent, and a case of using a chemically decomposed material is called a chemical blowing agent. If necessary, a nucleating agent may be added to the dissolved foaming agent to increase the pore size and uniformly form the pores.

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, methylgloride, trichlorethylene. , dichloroethane, methylene chloride, or trichlorofluoromethane or a combination thereof may be used, but is not limited thereto. The chemical blowing agent is one that causes bubbles to be formed by a chemical reaction, for example, an azo compound such as azodicarbonamide or activated azodicarbonamide; 5-phenyltetrazole or sodium bicarbonate, but is not limited thereto.

The physical foaming agent may be formulated in a spherical shape surrounded by a thermosetting resin in an encapsulated form, for example. 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 analog, 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 used alone, or a mixture of at least two kinds. 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 11 μm. In an embodiment of the present 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.

Various thermoplastic polymers can be used as the material for forming the framework of the foam layer, for example, polystyrene, polypropylene, polyethylene, polyester, and fluoropolymers, more specifically, styrene-isophine-styrene (SIS); styrenic block copolymers such as styrene-ethylene/butylene/styrene block copolymers (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 dienes, such as styrene-butadiene rubber (SRB); olefinic 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 copolymers; polyvinylcyclohexane; polyacrylonitrile; vinyl chloride resins such as polyvinyl chloride; urethane resins including thermoplastic polyurethanes; aromatic epoxy; polyamides such as polyamide (nylon), wholly aromatic polyamide (aramid) and amorphous polyamide; polyetherimide; poly(ether ketone) (PEEK); acrylonitrile-butadiene-styrene (ABS) copolymers; fluorinated elastomers; amorphous fluoropolymers; polydimethyl siloxane; poly(phenylene sulfide); polyphenylene oxide; polyphenylene oxide-polyphenylene oxide mixtures such as 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 including a polyurethane having a molecular weight of 100,000 to 150,000, or a polyethylene copolymer having a molecular weight of 100,000 to 300,000, or a combination thereof is used.

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

A silane coupling agent generally refers to a compound of the formula:

YR-Si-(X)3

wherein X denotes a hydratable group such as alkoxy, Y is a functional organic group such as amino, methacryloxy or epoxy, and R is an aliphatic hydrocarbon linker such as (CH2)n (n=0 to 3).

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

The antioxidant is a component that allows the prepared film to have improved properties such as improved heat resistance and light resistance, and a phenol-based antioxidant or an amine-based antioxidant 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 the amine-based antioxidant, for example, CHIMASSORB 2020FDL, CHIMASSORB 944FDL and CHIMASSORB 119FL sold by BASF can be used.

Cure retarders are used to slow the curing of the film, for example, 4-methoxyphenol, 4-ethoxyphenol, 3-t-butyl-4-hydroxyanisole, 2-t-butyl-4- hydroxyanisole, and alkoxyphenols such as 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 rice; catechols such as catechol, 4-t-butylcatechol and 3,5-di-t-butylcatechol; and benzoquinones such as benzoquinone, naphthoquinone, and methylbenzoquinone, but is not limited thereto.

In one embodiment of the present invention, the catalyst may use 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 organometallic 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 foamed layer after foaming to the thickness of the foamed layer before foaming.

_<수학식1>

_{<Equation 1>}

(here, _RE : foaming rate, T _f : thickness of the foaming layer after foaming, T ₀ : thickness of the foaming layer before foaming)

The foaming rate will be adjustable by a person skilled in the art according to the foaming temperature and foaming time. In one embodiment of the present invention, the foaming rate of the foaming layer in the adhesive film is about 120% to about 200%, in another embodiment of the present invention about 140% to about 200%, in another embodiment of the present invention about 160% to about 200%, in another embodiment from about 180% to about 200%. When the foaming rate is less than 120%, the shock-absorbing property cannot be achieved at a desired level, and when the foaming rate exceeds 200%, the strength of the foaming layer is lowered and the foaming layer may be broken. .

In addition to the foaming rate of the foam layer, the porosity is also a factor that can increase the impact strength. The porosity is a value indicating the density of gas contained in the foam sheet or the gas phase occupancy rate of the sheet, and means the volume occupied by the pores with respect to the volume of the entire foam layer:

_<수학식2>

_{<Equation 2>}

φ: porosity

(here, φ: porosity, V: total volume of the foam layer, Vv: volume of pores, Vs: volume of solid outside the pores)

In an embodiment of the present invention, the porosity of the foam layer is 40% to 80%, and 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 %to be. When the porosity of the foamed layer is less than 40%, the desired degree of shock absorption cannot be achieved, and when the porosity of the foamed layer exceeds 80%, the film strength cannot be obtained to the desired degree.

The present inventors confirmed that, when the foam layer has the same thickness, the shock absorption rate increases when the foaming rate is increased up to a certain level, and when the foam layer has the same thickness, the impact absorption rate increases when the porosity decreases up to a certain level. That is, the present invention was completed by confirming that the impact absorption rate was increased when the foaming layer had a high foaming rate and various pore sizes.

Adhesive force measures the degree to which the adhesive film adheres to the adherend by a prescribed method, expresses the resistance to repulsion in units of force, and refers to the force required to peel off the adherend by pulling it in the 180º direction or pulling it in the 90º direction. . In the present invention, the adhesive force was measured according to ASTM D3330 with respect to stainless steel (SUS). More specifically, for 180º adhesion measurement, the surface of the SUS 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 to one side was attached to the prepared SUS and pressed with a 2 kg pressing roller. It was compressed by reciprocating once at a speed of 300 mm/min, and after 30 minutes, the tip of the test piece was folded 180º and measured at a speed of 300 mm/min. The value when peeled to 50 mm was measured, and the average value was obtained after 3 repetitions.

The adhesive film according to the present invention showed an adhesive strength of 3000 gf/in or more, and was particularly found to have an adhesive strength of 3400 gf/in to 3700 gf/in. When the adhesive film according to the present invention includes the foaming layer, 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 foaming layer is not included. became

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

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

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

In one embodiment of the present invention, the base layer may be selectively used by a person skilled in the art according to a desired elongation of the adhesive tape. As the base layer, for example, a polyethylene terephthalate (PET) film, a polycyclohexylene dimethylphthalate (PCT) film, a polyethylene naphthalate (PEN) film, a polyimide (PI) film, a 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 a polycarbonate (PC) film may be used, but is not limited thereto.

The adhesive film according to an embodiment of the present invention may be manufactured according to a conventional method. For example, primer surface treatment or corona surface treatment is applied to one surface of the base layer having a desired elongation to enhance bonding strength between the foam layer and/or the second adhesive layer and the base layer. One surface of the surface-treated base layer is coated with a composition containing a foaming agent 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 surface of the base layer on which the foam layer is formed, and the first adhesive layer is coated on one surface of the foam layer and dried to form the first and second adhesive layers to form Thereafter, a release film layer (not shown) is applied to one surface of the first and second adhesive layers. However, the above manufacturing method is an example of various manufacturing methods, and can be easily modified by those skilled in the art according to methods known in the art.

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

Example

Recipe 1

Polyurethane is the main material on one surface of the surface-treated base layer having a thickness of 43 μm, and about 0.8 parts by weight of a foaming agent having a particle size of 6 to 11 μm based on 100 parts by weight of the main material, 1.0 parts by weight of indigo ink, 0.6 weight A blowing agent composition comprising parts of a leveling agent, 0.6 parts by weight of an inorganic coupling agent, 0.1 parts by weight of a phenolic antioxidant, and 0.1 parts by weight of an epoxy curing agent is applied, and one drying zone is 4 m, 50, 70, 80, 110, 150 , 150, 155, and 150 ℃, a foam layer having a thickness of 60 μm with a porosity of 40% was formed by foaming while transporting at a speed of 11.5 m/min in a thermal dryer divided into eight stages. After that, the adhesive composition is coated on one side of the base layer and one side of the foam layer, and one drying zone is 4 m, and the heat divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, and 140 ℃ The first and second adhesive layers were respectively 120 μm thick and 127 μm thick by drying while moving at a speed of 6 m/min in a dryer, and the first and second release film layers of 50 μm and 75 μm thick were applied, respectively. A 350 μm thick adhesive tape was prepared.

Recipe 2

In Preparation Example 1, a foamed layer having a thickness of 80 μm was formed by foaming while transported 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 in Preparation Example 1, except that it was dried and formed to a thickness of 110 μm and 117 μm, respectively.

Recipe 3

In Preparation Example 1, a foamed layer having a thickness of 90 μm was formed by foaming 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 in Preparation Example 1, except that it was dried and formed to a thickness of 105 μm and 112 μm, respectively.

recipe 4

In Preparation Example 1, a foamed layer having a thickness of 100 μm was formed by foaming 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 in Preparation Example 1, except that it was dried and formed to a thickness of 100 μm and 107 μm, respectively.

recipe 5

In Preparation Example 1, a foam layer having a thickness of 120 μm was formed by foaming 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 in Preparation Example 1, except that it was dried and formed to a thickness of 90 μm and 97 μm, respectively.

recipe 6

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

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

recipe 7

In Preparation Example 6, a foaming layer having a thickness of 80 μm was formed by foaming 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 in Preparation Example 6, except that it was dried and formed to a thickness of 110 μm and 117 μm, respectively.

recipe 8

In Preparation Example 6, a foamed layer having a thickness of 80 μm was formed by foaming 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 in Preparation Example 6, except that it was dried and formed to a thickness of 110 μm and 117 μm, respectively.

recipe 9

In Preparation Example 6, a foaming layer having a thickness of 80 μm was formed by foaming 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 in Preparation Example 6, except that it was dried and formed to a thickness of 110 μm and 117 μm, respectively.

Recipe 10

In Preparation Example 6, a foamed layer having a thickness of 80 μm was formed by foaming while transported 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 9.5 m/min. It was prepared in the same manner as in Preparation Example 6, except that it was dried and formed to a thickness of 110 μm and 117 μm, respectively.

recipe 11

Polyurethane is the main material on one surface of the surface-treated base layer having a thickness of 43 μm, and about 1.2 parts by weight of a foaming agent having a particle size of 6 to 11 μm based on 100 parts by weight of the main material, 1.0 parts by weight of indigo ink, 0.6 weight A blowing agent composition comprising parts of a leveling agent, 0.6 parts by weight of an inorganic coupling agent, 0.1 parts by weight of a phenolic antioxidant, and 0.1 parts by weight of an epoxy curing agent is applied, one drying zone is 4 m and 50, 70, 80, 110, 150, A foam layer having a porosity of 60% and a thickness of 60 μm was formed by foaming while transporting at a speed of 11.5 m/min in a thermal dryer divided into a total of 8 stages at 150, 155, and 150°C. After that, the adhesive composition is coated on one side of the base layer and one side of the foam layer, and one drying zone is 4 m, and the heat dryer is divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, 140 ° C. The first and second adhesive layers of 120 μm and 127 μm thickness were formed by drying while transported at a speed of 6 m/min in prepared.

recipe 12

In Preparation Example 11, a foaming layer having a thickness of 80 μm was formed by foaming 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 in Preparation Example 11, except that it was dried and formed to a thickness of 110 μm and 117 μm, respectively.

Recipe 13

In Preparation Example 11, a foamed layer having a thickness of 90 μm was formed by foaming 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 in Preparation Example 11, except that it was dried and formed to a thickness of 105 μm and 112 μm, respectively.

Recipe 14

In Preparation Example 11, a foamed layer having a thickness of 100 μm was formed by foaming 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 in Preparation Example 11, except that it was dried and formed to a thickness of 100 μm and 107 μm, respectively.

Recipe 15

In Preparation Example 11, a foaming layer having a thickness of 120 μm was formed by foaming 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 9.5 m/min. It was prepared in the same manner as in Preparation Example 11, except that it was dried and formed to a thickness of 90 μm and 97 μm, respectively.

Recipe 16

Polyurethane is the main material on one surface of the surface-treated base layer having a thickness of 43 μm, and about 1.4 parts by weight of a foaming agent having a particle size of 6 to 11 μm based on 100 parts by weight of the main material, 1.0 parts by weight of indigo ink, 0.6 weight A blowing agent composition comprising parts of a leveling agent, 0.6 parts by weight of an inorganic coupling agent, 0.1 parts by weight of a phenolic antioxidant, and 0.1 parts by weight of an epoxy curing agent is applied, one drying zone is 4 m and 50, 70, 80, 110, 150, A foaming layer having a porosity of 68% and a thickness of 90 μm was formed by foaming while transporting at a speed of 9 m/min in a thermal dryer divided into 8 stages at 150, 155, and 150°C. After that, the adhesive composition is coated on one side of the base layer and one side of the foam layer, and one drying zone is 4 m, and the heat dryer is divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, 140 ° C. The first and second adhesive layers of 105 μm and 112 μm thickness were formed by drying while transported at a speed of 8 m/min in prepared.

recipe 17

In Preparation Example 16, a foamed layer having a thickness of 100 μm was formed by foaming 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 in Preparation Example 16, except that it was dried and formed to a thickness of 100 μm and 107 μm, respectively.

recipe 18

In Preparation Example 16, a foamed layer having a thickness of 120 μm was formed by foaming while transported at the same drying temperature at a speed of 7 m/min, and the first and second adhesive layers were dried 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 a thickness of 90 μm and 97 μm, respectively.

recipe 19

Polyurethane is the main material on one surface of the surface-treated base layer having a thickness of 43 μm, and about 1.4 parts by weight of a foaming agent having a particle size of 6 to 11 μm based on 100 parts by weight of the main material, 1.0 parts by weight of indigo ink, 0.6 weight A blowing agent composition comprising parts leveling agent, 0.6 parts by weight inorganic coupling agent, 0.5 parts by weight phenolic antioxidant, and 0.1 parts by weight epoxy curing agent is applied, one drying zone is 4 m and 50, 70, 80, 110, 150, A foam layer having a porosity of 74% and a thickness of 90 μm was formed by foaming while transporting at a speed of 9 m/min in a thermal dryer divided into 8 stages at 150, 155, and 150°C. After that, the adhesive composition is coated on one side of the base layer and one side of the foam layer, and one drying zone is 4 m, and the heat dryer is divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, 140 ° C. The first and second adhesive layers of 105 μm and 112 μm thickness were formed by drying while transported at a speed of 8 m/min in prepared.

recipe 20

In Preparation Example 19, a foamed layer having a thickness of 100 μm was formed by foaming while transported 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 9.5 m/min. It was prepared in the same manner as in Preparation Example 19, except that it was dried and formed to a thickness of 100 μm and 107 μm, respectively.

recipe 21

Polyurethane is the main material on one side of the surface-treated base layer having a thickness of 43 μm, and about 1.0 parts by weight of a foaming agent having a particle size of 6 to 11 μm with respect to 100 parts by weight of the main material, and about 1.0 parts by weight of 4-5 μm beads , 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 and one drying zone is 4M and 50, 70, 80, 110 , 150, 150, 155, 150 ℃, a foam layer having a thickness of 90 μm with a porosity of 50% was formed by foaming while transporting at a speed of 9 m/min in a thermal dryer divided into 8 stages at a total of 8 stages. After that, the adhesive composition is coated on one side of the base layer and one side of the foam layer, and one drying zone is 4 m, and the heat dryer is divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, 140 ° C. The first and second adhesive layers of 105 μm and 112 μm thickness were formed by drying while transported at a speed of 8 m/min in prepared.

recipe 22

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

recipe 23

It was prepared in the same manner as in Preparation Example 21, except that 0.1 parts by weight of the phenolic antioxidant was added in an amount of 0.2 parts by weight in Preparation Example 21.

Recipe 24

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

recipe 25

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

recipe 26

Polyurethane is the main material on one side of the surface-treated base layer having a thickness of 43 μm, and about 1.0 parts by weight of a foaming agent having a particle size of 6 to 11 μm with respect to 100 parts by weight of the main material, and about 1.0 parts by weight of 4-5 μm beads , 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 and one drying zone is 4 m, 50, 70, 80, 110 , 150, 150, 155, 150 ℃, a foam layer having a thickness of 100 μm with a porosity of 50% was formed by foaming while transporting at a speed of 9 m/min in a thermal dryer divided into eight stages. After that, the adhesive composition is coated on one side of the base layer and one side of the foam layer, and one drying zone is 4 m, and the heat dryer is divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, 140 ° C. 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 of 50 μm and 75 μm was applied to form a 350 μm thick adhesive tape. prepared.

recipe 27

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

recipe 28

It was prepared in the same manner as in Preparation Example 26, except that 0.1 parts by weight of the phenolic antioxidant was added in an amount of 0.2 parts by weight in Preparation Example 26.

Recipe 29

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

recipe 30

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

Comparative Example 1

Polyurethane is the main material on one surface of the surface-treated base layer having a thickness of 43 μm, and based on 100 parts by weight of the main material, 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, 0.1 parts by weight After applying a composition comprising a phenolic antioxidant and 0.1 parts by weight of an epoxy curing agent, one drying zone is 4 m and divided into a total of 8 steps of 50, 70, 80, 110, 150, 150, 155, 150 ° C. It was transported at a speed of 9 m/min in a thermal dryer and dried to form a cushion layer having a thickness of 90 μm. After that, the adhesive composition is coated on one side of the base layer and one side of the cushion layer, and one drying zone is 4 m, and the heat dryer is divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, 140 ℃. The first and second adhesive layers of 105 μm and 112 μm thickness were formed by drying while transported at a speed of 8 m/min in prepared.

Comparative Example 2

Polyurethane is the main material on one surface of the surface-treated base layer having a thickness of 43 μm, and based on 100 parts by weight of the main material, 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, 0.1 parts by weight After applying a composition comprising a phenolic antioxidant and 0.1 parts by weight of an epoxy curing agent, one drying zone is 4 m and divided into a total of 8 steps of 50, 70, 80, 110, 150, 150, 155, 150 ° C. It was transported at a speed of 8 m/min in a thermal dryer and dried to form a cushion layer having a thickness of 100 μm. After that, the adhesive composition is coated on one side of the base layer and one side of the cushion layer, and one drying zone is divided into a total of 8 steps of 60, 70, 75, 100, 120, 140, 145, 140 ℃ in a 4m dryer. Transported at a speed of 9 m/min in a dryer and dried to form first and second adhesive layers with a thickness of 100 μm and 107 μm, respectively, and a release film layer of 50 μm and 75 μm is applied to an adhesive tape having a thickness of 350 μm. was prepared.

Comparative Example 3

The adhesive composition is coated on one surface of the base layer having a surface-treated 43 μm thickness on the upper and lower surfaces of the base layer, and one drying zone is 4 m, 60, 70, 75, 100, 120, 140, 145, It was transported and dried at a speed of 3.5 m/min in a thermal dryer divided into a total of 8 steps at 140°C to form first and second adhesive layers with a thickness of 150 μm and 157 μm, respectively, and release with a thickness of 50 μm and 75 μm A film layer was applied to prepare an adhesive tape having 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 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 Tables 8 to 14.

recipe
One recipe
2 recipe
3 recipe 4 recipe 5 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (μm) blowing agent Content (parts by weight) 0.8 0.8 0.8 0.8 0.8 Particle size (μm) 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 blue 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 phenolic 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 a value based on 100 parts by weight of the main material of the foaming agent composition.

recipe 6 recipe 7 recipe 8 recipe 9 Recipe 10 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (μm) blowing agent Content (parts by weight) One One One One One Particle size (μm) 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 blue 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 Phenolic 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 a value based on 100 parts by weight of the main material of the foaming agent composition.

recipe 11 recipe 12 Recipe 13 Recipe 14 Recipe 15 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (μm) blowing agent Content (parts by weight) 1.2 1.2 1.2 1.2 1.2 Particle size (μm) 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 blue 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 Phenolic 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 a value based on 100 parts by weight of the main material of the foaming agent composition.

Recipe 16 recipe 17 recipe 18 recipe 19 recipe 20 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (μm) blowing agent Content (parts by weight) 1.4 1.4 1.4 1.4 1.4 Particle size (μm) 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 blue 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 Phenolic 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 a value based on 100 parts by weight of the main material of the foaming agent composition.

recipe 21 recipe 22 recipe 23 Recipe 24 recipe 25 Beads (PU particles coated with carbon black) Content (parts by weight)* One One One One One Particle size (μm) 4-5 4-5 4-5 4-5 4-5 blowing agent Content (parts by weight) One One One One One Particle size (μm) Foaming rate (%) 160 160 160 160 160 Cushion thickness Thickness (㎛) 90 90 90 90 90 Porosity (parts by weight) 50 50 50 50 50 blue 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 Phenolic antioxidant (pentaerythritol tetrakis propionate) 0.1 0.2 0.1 Epoxy Hardener 0.1 0.2 0.1

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

recipe 26 recipe 27 recipe 28 Recipe 29 recipe 30 Beads (PU particles coated with carbon black) Content (parts by weight)* One One One One One Particle size (μm) 4-5 4-5 4-5 4-5 4-5 blowing agent Content (parts by weight) One One One One One Particle size (μm) 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 blue 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 Phenolic antioxidant (pentaerythritol tetrakis propionate) 0.1 0.2 0.1 Epoxy Hardener 0.1 0.2 0.1

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

Comparative Example 1 Comparative Example 2 Comparative Example 3 Beads (PU particles coated with carbon black) Content (parts by weight)* Particle size (μm) blowing agent Content (parts by weight) Particle size (μm) Foaming rate (%) Cushion thickness Thickness (㎛) 90 100 0 Porosity (%) 50 50 0 blue 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 Phenolic antioxidant (pentaerythritol tetrakis propionate) 0.1 0.1 Epoxy Hardener 0.1 0.1

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

Structure (㎛) Recipe 1 Recipe 2 Recipe 3 recipe 4 recipe 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 (㎛) recipe 6 recipe 7 recipe 8 recipe 9 Recipe 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 (㎛) recipe 11 recipe 12 Recipe 13 Recipe 14 Recipe 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
(μm) Recipe 16 recipe 17 recipe 18 recipe 19 recipe 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
(μm) recipe 21 recipe 22 recipe 23 Recipe 24 recipe 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
(μm) recipe 26 recipe 27 recipe 28 Recipe 29 recipe 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

Example 1

Adhesion was measured according to ASTM-D3330 with respect to the SUS adherend, and the results are shown in Table 15 below.

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

As shown in Table 15, it was confirmed that, even if the adhesive of the same component was used, when the foaming layer was absent, the adhesive strength was relatively low.

Example 2

Impact strength was measured three times in accordance with ASTM D1794, and the average value of the results is shown in Table 16.

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

As shown in Table 16, in Comparative Examples 1 to 3 without the foam layer, the interlayer strength was less than 100 mJ. On the other hand, in the case of a foamed layer having the same thickness, the interlayer strength increased as the foaming rate and/or porosity was higher, and when the foamed layer had the same thickness, the foamed layer having a porosity of 68% had a porosity of 74%. It was found to have a higher interlayer strength than that of the foam layer. 4 (d), the adhesive film includes a first adhesive layer (PSA1), a first foam layer (CU1), a base layer (BS), a second foam layer (CU2) and a second adhesive layer (PSA2) do. Referring to Figure 4 (e), the adhesive film is a first adhesive layer (PSA1), a first foam layer (CU1), a second adhesive layer (PSA2), a second foam layer (CU2) and a third adhesive layer (PSA3) include 4 (f), the adhesive film is a first adhesive layer (PSA1), a first base layer (BS1), a first foam layer (CU1), a second adhesive layer (PSA2), a second base layer (BS2) , a second foam layer (CU2) and a third adhesive layer (PSA3).

Meanwhile, the embodiments described in FIG. 4 are examples of an adhesive film, and the lamination structure and the lamination order, and the specific material and thickness ranges of each layer may be appropriately changed as needed, and are not limited to the illustrated examples.

5 is a cross-sectional view for explaining a laminated structure of an adhesive film of a body protector according to embodiments of the present invention.

Referring to FIG. 5A , the adhesive film may include an adhesive layer (PSA) and a foam layer (CU) that are sequentially stacked.

Referring to FIG. 5B , the adhesive film may include an adhesive layer (PSA), a base layer (BS), and a foam layer (CU) that are sequentially stacked.

5 (c), the adhesive film may include a first adhesive layer (PSA1), a first foam layer (CU1), a base layer (BS) and a second foam layer (CU2) that are sequentially stacked have.

5 (d), the adhesive film may include a first adhesive layer (PSA1), a first foam layer (CU1), a second adhesive layer (PSA2) and a second foam layer (CU2) that are sequentially stacked. can

Referring to (e) of Figure 5, the adhesive film is a first adhesive layer (PSA1), a first base layer (bs1), a first foam layer (CU1), a second adhesive layer (PSA2), the second are sequentially stacked It may include a base layer (BS2) and a second foam layer (CU2).

The adhesive films shown in FIG. 5 have an adhesive layer on the top layer and a foam layer on the bottom layer, so that body protection equipment can be completed without a separate endothelium just by attaching it to the inside of the skin of the body protection device.

Characteristics of each layer of the stacked structures shown in FIG. 5 are substantially the same as the characteristics of the layers described in FIG. 4B , and thus a detailed description thereof will be omitted.

6 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.

Referring to FIG. 6 , the body protector includes an outer skin 500 , an endothelium 600 , an adhesive film 100 positioned therebetween, and a strap ST connected to the outer skin 500 or the endothelium 600 . can do. The adhesive film 100 may be formed in the form of a single film (refer to FIG. 6(c)) or may include a plurality of adhesive patterns 100 (refer to FIG. 6(b)).

In this embodiment, the case where the body protector is applied as a knee protector or an elbow protector is illustrated.

7 is a perspective view and a cross-sectional view of a body protector according to an embodiment of the present invention.

Referring to FIG. 7 , the body protector may include an outer shell 500 , an endothelium 600 , and an adhesive film 100 positioned therebetween. A plurality of openings (OP) penetrating the outer skin 500, the adhesive film 100, and the endothelium 600 of the body protector may be formed, and the adhesive film 100 is formed in the form of a single film. or (refer to (c) of FIG. 7) or may include a plurality of adhesive patterns 100 (refer to (b) of FIG. 7).

8 is a flowchart illustrating a method of manufacturing a body protector according to an embodiment of the present invention.

Referring to FIG. 8 , the method for manufacturing the body protector includes the steps of preparing an outer skin and an endothelium (S100), forming an adhesive film (S200), attaching an adhesive film (S300), and an outer skin using an adhesive film and attaching the endothelium (S400).

In the step of preparing the outer skin and endothelium (S100), it is possible to prepare the outer skin and endothelium used in body protection equipment.

In the step of forming the adhesive film (S200), in order to bond the outer shell and the endothelium of the body protector to each other, an adhesive film having a high elongation and improved adhesive performance may be formed.

In the step of attaching the adhesive film (S300), the adhesive film may be attached to the endothelium or the outer skin.

In the step of attaching the outer skin and the endothelium using the adhesive film (S400), the outer skin and the endothelium may be attached to each other using the adhesive film.

In the step (S200) of forming the adhesive film, the foaming agent composition is applied to one surface of the base layer and the foaming rate is 140% to 200%, or the porosity is 40% to 74%, or a combination thereof. Forming a foaming layer on one surface of, and applying an adhesive composition to one surface of the foaming layer and one surface of the base layer not in contact with the base layer and the foaming layer, and drying to form an adhesive layer. Forming the adhesive film ( S200 ) may further include applying a first release film and a second release film on the adhesive layers on both surfaces of the adhesive film.

The release film selectively applicable in the present invention may be a film prepared using polyethylene terephthalate, polyethylene naphthalate, polypropylene terephthalate, polybutyrene 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 or operation. The first release film layer has a thickness equal to or thinner than that of the second release film layer, thereby facilitating the process of winding or unwinding the film during the production process and / or preventing damage to the film .

The first release film may be removed before the step of attaching the adhesive film, and the second release film may be removed before the step of attaching the outer shell and the endothelium to each other.

According to embodiments of the present invention, the body protector includes an adhesive film having a high elongation and improved adhesive performance. Accordingly, the inner skin including the curved surface inside the outer skin including the curved surface can be attached simply by using the adhesive film, which is a double-sided adhesive tape, without going through a separate process such as applying an adhesive, and the adhesive film has an elongation High, since the adhesive performance is improved, when using the body protector, the outer shell and the endothelium do not separate from each other even after repeated external shocks, and may be firmly coupled.

Although described with reference to the above embodiments, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. will be able

100: adhesive film 200: outer shell
300: endothelium

Claims (11)

At least a portion of the outer shell is formed in a curved surface;
an endothelium disposed inside the outer skin; and
It is disposed between the outer skin and the endothelium, comprising an adhesive film for adhering the endothelium to the outer skin,
The adhesive film
a first adhesive layer attached to the endothelium;
a first foaming layer disposed on the first adhesive layer; and
Disposed on the first foam layer, body protection comprising a second adhesive layer attached to the outer skin. According to claim 1,
The first foamed layer has at least one characteristic of (i) or (ii) below,
(i) a foaming rate of 140% to 200%,
(ii) a porosity of 40% to 74%,
The foaming rate (RE) satisfies Equation 1 below,

<Equation 1>
(here, _RE : foaming rate, T _f : thickness of the foaming layer after foaming, T ₀ : thickness of the foaming layer before foaming)
The porosity (φ) is body protection, characterized in that it satisfies Equation 2 below.

<Equation 2>
(here, φ: porosity, V: total volume of the foam layer, Vv: volume of pores, Vs: volume of solid outside the pores) 3. The method of claim 2,
The adhesive film
Further comprising a first base layer in contact with the first foam layer,
wherein the first base layer comprises thermoplastic polyurethane (TPU). 3. The method of claim 2,
Further comprising a second foaming layer in contact with the second adhesive layer,
The second foam layer has at least one of the following characteristics (i) or (ii),
(i) a foaming rate of 140% to 200%,
(ii) a porosity of 40% to 74%,
The foaming rate (RE) satisfies Equation 1 below,

<Equation 1>
(here, _RE : foaming rate, T _f : thickness of the foaming layer after foaming, T ₀ : thickness of the foaming layer before foaming)
The porosity (φ) is body protection, characterized in that it satisfies Equation 2 below.

<Equation 2>
(here, φ: porosity, V: total volume of the foam layer, Vv: volume of pores, Vs: volume of solid outside the pores) According to claim 1,
The adhesive film is body protection, characterized in that formed to correspond to the same area as the inner surface of the outer skin. According to claim 1,
The adhesive film
Body protection equipment comprising a plurality of adhesive patterns spaced apart from each other. According to claim 1,
The outer shell is formed of any one of plastic, fiber-reinforced plastic, acrylnitrile butadiene styrene, and polystyrene,
The endothelium is a sponge, styrofoam, rubber, body protection, characterized in that formed of any one of ethylene vinyl acetate copolymer (EVA). According to claim 1,
The shell includes a head, a chin, and a window positioned between the head and the chin,
The endothelium includes a first portion attached to the inside of the head and a second portion spaced apart from the first portion and attached to the inside of the chin,
wherein the adhesive film includes a first adhesive pattern positioned between the head and the first part and a second adhesive pattern positioned between the chin and the first part. According to claim 1,
Body protection equipment, characterized in that it further comprises a strap connected to the outer skin or endothelium preparing the integument and endothelium;
forming an adhesive film;
attaching the adhesive film to the endothelium or outer skin; and
and attaching the outer skin and the endothelium to each other using the adhesive film,
The adhesive film forming step is
Forming a foaming layer on one surface of the base layer by applying a foaming agent composition to one surface of the base layer and foaming so that the foaming rate is 140% to 200%, the porosity is 40% to 74%, or a combination thereof; and
Method of manufacturing a body protector comprising the step of forming an adhesive layer by applying an adhesive composition to one surface of the foam layer and one surface of the base layer that are not in contact with the base layer and the foam layer 11. The method of claim 10,
The adhesive film forming step further comprises applying a first release film and a second release film on the adhesive layers on both sides of the adhesive film,
Method of manufacturing a body protector, characterized in that removing the first release film before the step of attaching the adhesive film, and removing the second release film before the step of attaching the outer skin and the endothelium to each other.

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