KR102064883B1 - POLYURETHANE RESIN COMPOUNDS including polythiol AND MOBILE DEVICE BEZEL ADHESIVE TAPE USING THE SAME - Google Patents

Abstract

It is possible to provide a polyurethane adhesive resin composition comprising a polythiol having excellent adhesion while maintaining high tensile strength and an adhesive tape for a mobile device including the same.

Description

Polyurethane adhesive resin composition comprising a polythiol and adhesive tape for mobile devices comprising the same {POLYURETHANE RESIN COMPOUNDS including polythiol AND MOBILE DEVICE BEZEL ADHESIVE TAPE USING THE SAME}

The present invention relates to a polyurethane adhesive resin composition comprising a polythiol and an adhesive tape for a mobile device including the same, and more particularly, to a polyurethane adhesive resin including a polythiol having excellent adhesive strength while maintaining high tensile strength. A composition and an adhesive tape for a mobile device comprising the same.

Recently, mobile devices represented by smartphones and smart pads can produce not only simple functions for phone calls, but also multimedia contents such as photographing and video recording, and can play stored music and movies. You can use various functions such as navigation service and exercise record. In addition, by providing a variety of functions, such as downloading or uploading the multimedia content in real time by accessing the communication system to provide a lot of convenience to the user. Therefore, many users use mobile devices in various ways for their hobbies and leisure life.

However, typical mobile devices are manufactured with a precise structure that includes a large number of electronic components therein. Therefore, if the user accidentally falls or is shocked by external factors, it can be easily damaged. In particular, when two different parts are bonded to each other using an adhesive or adhesive tape, the bonding surface has the weakest strength, so when an impact is applied from the outside, the display is split in two, or when the display is bonded. It may break, causing problems such as a user having to pay a lot of repair costs. Therefore, many manufacturers are adopting a structure like a unibody case with a single case to solve this problem, but it is not a way to solve the more fundamental problem.

In particular, the use of mobile devices in the outdoors can cause a variety of unusual external factors, such as collisions, falls, and shakes, to be transmitted to the mobile device due to the user's active movement, which is more than normal use for mobile devices. Strong impacts will be applied. Since these shocks can easily damage mobile devices, there has been a need to devise a way to protect them by distributing them, especially in order to make them easier to use in extreme environments. Methods have been devised to improve impact properties and to absorb and disperse impacts from the outside. The most common method has been applied to mobile devices by devising a structure that can absorb the adhesive or adhesive tape for bonding the case or display to a shock absorbing structure, this method is particularly the case that the joint surface of the case that the most damage occurs during impact Applied to the display bonding surface, there has been provided a method capable of absorbing the amount of impact applied to the mobile device.

In addition, when a user engages in water leisure activities in a humid, humid environment or in a place such as a water park, swimming pool or beach, the mobile device owns a large amount of water or is flooded by a hand or a stand, It will penetrate and break the device. In particular, in places containing a large amount of salt such as beaches, water parks, swimming pools, etc., where a large amount of ions and minerals are forcibly added, water penetrates more quickly by osmotic pressure, and at the same time, touches electronic devices. Can cause corrosion and erosion faster than regular tap water. In this case, there is a concern that the general drying machine cannot reuse electronic devices again, and that the entire mobile device must be replaced because repair is impossible.

Therefore, many manufacturers are adopting a structure like a unibody case with a single case to solve this problem, but it is not a way to solve the more fundamental problem.

Intense leisure activities in water, especially water skiing and skin scuba

Mobile devices exposed to are exposed to high water pressure due to the user's active movement and high water pressure, and various external factors such as collision, drop, and shaking can be transmitted to the mobile device, More stress is applied than normal use. Because of this stress, mobile devices can be more easily damaged, and there has been a need to devise ways to protect them in such environments, especially in order to make them easier to use in extreme environments. The structure of a waterproof mobile device has been devised.

Therefore, a more advanced method is needed to solve the above problems, and it is desirable to design the structure of the mobile device as a waterproof and impact resistant structure, but in external parts such as the design becomes thick and thick. Problems may arise. Therefore, in order to improve the waterproofness and impact resistance of the mobile device while maintaining the existing design, a more robust, waterproof, and shock-absorbing bonding method was required on the bezel portion connecting the case and the display. Various inventions have been preceded for this purpose.

Korean Laid-Open Patent Publication No. 10-2013-0092112 relates to a double-sided tape for a touch screen panel having excellent impact resistance, and more particularly, to a double-sided tape for a touch screen panel having excellent impact resistance. It consists of a base layer formed by forming a foamed foam coating layer, an adhesive layer formed on the upper and lower surfaces of the above-described base layer and a release layer formed on the outer surface of the adhesive layer described above. The above-described double impact tape for touch screen panel having excellent impact resistance is positioned between the touch screen panel module and the liquid crystal module to firmly bond the touch screen panel module and the liquid crystal module, and has excellent heat resistance and impact resistance. However, the present invention has improved the impact resistance, but has a problem that the tissue is not dense and thick because it is composed of acrylic foam.

In addition, Korean Patent Publication No. 10-2009-0037966 Curable epoxy resin-based

The invention of the adhesive composition relates to a process for the preparation of an epoxy-based adhesive composition having improved adhesion and / or improved impact resistance to a greased metal substrate, in particular a composition useful as an adhesive, epoxy resin, core- A composition including rubber particles having a shell structure, polyurethane, and plate-like fillers can form a strong adhesion even on oil or contaminated metal surfaces and exhibit excellent impact resistance.

However, the present invention proposes a structure capable of improving impact resistance, but does not suggest any effect on waterproofing.

In addition, the invention of Korean Patent No. 10-1625605 buffer tape having a light leakage prevention and waterproofing function and a buffer tape having a light leakage preventing function is formed to have a primary waterproofing effect and a buffering effect by having a foam-molded polymer foam foam Buffer film; A waterproof film having a waterproof polymer having a porosity of 1% to 50% to have a secondary waterproof effect; And a light blocking layer printed on the waterproof film and disposed between the waterproof film and the buffer film and having a colored material, wherein the light blocking layer extrudes a mixture of the waterproof polymer, the color pigment, and aluminum oxide (Al 2 O 3). Or by providing a buffer tape having a light leakage prevention and waterproofing function produced by casting molding, it is possible to absorb the impact applied to the object through the configuration of the foam molded polymer foam. As a result, it is possible to prevent a considerable amount of failure due to damage to the object and impact. In addition, when the buffer tape having a light leakage preventing function is attached to a window panel of a portable terminal, the light leaking from the display panel of the portable terminal can be easily blocked through the configuration of the light blocking film attached to the buffer film. The finishing quality of the terminal can be further improved. Furthermore, through the construction of the waterproof polymer, it is possible to firmly seal the fine gap of the object, thereby providing a waterproof function for the object. However, the present invention is not preferable to be applied to the adhesive tape for a low-cost waterproof mobile device because the structure of the tape is very complex because five or more layers of the tape should be configured. In addition, since the light blocking layer is composed of colored pigments and aluminum oxide, the overall color may be colored, and thus the bonding surface of the mobile device may appear more sharp.

As described above, the invention related to the adhesive composition and the tape using the same have improved the impact resistance or improved the water resistance, and is implemented in a complicated structure. It is expensive and can increase the cost burden on the user.

Moreover, in recent years, the expectation for thinner adhesive tapes has increased due to the slimming of mobile devices, but there is a problem in that satisfactory results are not obtained.

Therefore, in the present invention, there is a need for an improvement in technology for an adhesive tape having a more improved structure that can improve adhesion while maintaining impact resistance on one tape with a thin thickness.

Korean Patent Publication No. 2013-0092112 Korean Patent Publication No. 2014-0105119 Korean Patent No. 1222195

The present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

The inventors of the present application, after repeated in-depth studies and various experiments, as described later, a polyurethane adhesive resin composition comprising a polythiol having a very thin film thickness and excellent adhesion while maintaining high tensile strength, and the composition It is to provide an adhesive tape for a mobile device configured to include on the surface of the substrate.

Polyurethane adhesive resin composition comprising a polythiol according to the present invention for achieving this object, a polythiol containing at least two functional groups, a pair of hydroxyl groups (-OH), hydrogenated polybutadiene diol, Block copolymer composition comprising a pair of isocyanate (NCO) functional groups synthesized from composition A comprising at least two or more selected from the group consisting of polydimethylsiloxane diols, polypropylene glycol and polyethylene glycol and compound B comprising isocyanates C;

Rubber particles having a core-shell structure and having an elastic modulus of the core lower than that of the shell; And

It provides a polyurethane adhesive resin composition containing a polythiol containing a tackifier.

In one preferred embodiment of the present invention, the isocyanate compound,

2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, 1,5-naphthalene diisocyanate, 2,4-triylene diisocyanate, 2, 6-triene diisocyanate, 1,3-xylene diisocyanate, diphenylmethane-4,4-diisocyanate, 3-methyl-diphenylmethane diisocyanate, methylene diphenyl diisocyanate (MDI), 1,6-hexanedi Isocyanate, isophorone diisocyanate, dicyclohexyl methane diisocyanate, hexamethylene diisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane and 1,4-bis (isocyanatemethyl) cyclohexane It may include at least one or more.

In one preferred embodiment of the present invention, the tackifier is hydroxyethyl acrylate (HEA), hydroxypropyl acrylate (HPA), hydroxybutyl acrylate (HBA) and hydroxyethyl methacrylate (2- HEMA)) may comprise one or more selected from the group consisting of.

In one preferred embodiment of the invention, the rubber particles may have an average particle size of 100 to 10,000 nm.

In one preferred embodiment of the invention, the rubber particles are homopolymers of silicone, butadiene, isoprene, butadiene, isoprene, (meth) acrylonitrile, (meth) acrylate and polysiloxane elastomers, (meth) acrylate-butadiene- A core comprising at least one selected from the group consisting of styrene copolymers; And

And a shell including at least one selected from the group consisting of silicone, (meth) acrylate, methyl methacrylate, styrene, acrylonitrile, acrylic acid, and (meth) acrylamide copolymer.

On the other hand, the present invention provides an adhesive tape containing the above adhesive resin composition,

materials; And

It may include; an adhesive layer formed on the surface of the substrate at least one or more polyurethane adhesive resin composition in which the polythiol is introduced.

In one preferred embodiment of the invention, the substrate is polyethersulfone, polyacrylate, polyether imide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyvinyl chloride, polyimide, poly It may comprise at least one or more from the group consisting of carbonate, cellulose tri acetate and cellulose acetate propionate.

In one preferred embodiment of the present invention, the adhesive tape may have an impact resistance of 1500mJ to 3000mJ.

In one preferred embodiment of the present invention, the adhesive tape has a thickness of 80 μm or less, and the tensile strength may be 0.90 to 1.50 kgf / mm ² .

In one preferred embodiment of the present invention, the substrate has a thickness of 20㎛ to 70㎛, the adhesive layer may have a thickness of 10㎛ to 60㎛.

In one preferred embodiment of the present invention, the adhesive tape may range from 2 to 10 kgf / in adhesive force, 5 to 15 kgf / cm ² shear strength, 7,000 to 15,000 min holding force, and 120 to 200 ° C. heat resistance.

As described above, the polyurethane adhesive resin composition including the polythiol according to the present invention and the adhesive tape for a mobile device including the same have a very thin film thickness and have excellent adhesive strength while maintaining high tensile strength.

1 is a schematic configuration diagram of an adhesive tape for a mobile device according to an embodiment of the present invention.

In the following description of the invention, reference is made to specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention with respect to one embodiment.

The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled.

In addition, unless specified otherwise in the present specification, "substituted" to "substituted" means at least one hydrogen atom of the functional group of the present invention is a halogen atom (-F, -Cl, -Br or -I), hydroxy group, Nitro group, cyano group, amino group, amidino group, hydrazine group, hydrazone group, carboxyl group, ester group, ketone group, substituted or unsubstituted alkyl group, substituted or unsubstituted alicyclic organic group, substituted or unsubstituted aryl group And substituted or unsubstituted alkenyl group, substituted or unsubstituted alkynyl group, substituted or unsubstituted heteroaryl group, and substituted or unsubstituted heterocyclic group, and substituted with one or more substituents selected from the group consisting of In addition, the substituents may be linked to each other to form a ring.

In the present invention, unless otherwise specified, the "substituted" is a hydrogen atom substituted with a substituent such as a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms, an alkoxy group of 1 to 20 carbon atoms, an aryloxy group of 6 to 20 carbon atoms Means that.

In addition, "hydrocarbon group" means a linear, branched or cyclic saturated or unsaturated hydrocarbon group, unless otherwise specified, the alkyl group, alkenyl group, alkynyl group, etc. may be linear, branched or cyclic.

In addition, unless specified otherwise in the present specification, "alkyl group" means a C1 to C30 alkyl group, and "aryl group" means a C6 to C30 aryl group. As used herein, "hetero ring group" refers to a group containing 1 to 3 heteroatoms selected from the group consisting of O, S, N, P, Si and combinations thereof in one ring, for example, pyridine, Thiophene, pyrazine, and the like, but is not limited thereto.

Hereinafter, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

As described above, conventionally, there is a problem in that the adhesive force is reduced when maintaining excellent impact resistance.

Therefore, the present invention is configured to introduce a polythiol (polythiol) in addition to the diol in the chain of the urethane acrylate, so that the adhesive strength can be greatly improved while maintaining the tensile strength even if the curing density is increased to solve the above-mentioned problems Groped.

Polythiol-introduced polyurethane adhesive resin composition according to the present invention comprises a polythiol containing at least two or more functional groups, a pair of hydroxyl groups (-OH) hydrogenated polybutadiene diol, polydimethylsiloxane diol, poly A block copolymer composition C comprising a pair of isocyanate (NCO) functional groups synthesized from a composition A comprising at least two or more selected from the group consisting of propylene glycol and polyethylene glycol and a compound B comprising an isocyanate, with a core-shell structure It can be composed of a rubber particle and the adhesion agent is lower than the elastic modulus of the core and the elastic modulus of the core. And composition C is formed through synthesis of composition A and compound B. At this time, the composition C may be composed of a binary or ternary random copolymer, it may be configured to include two or more selected from the group of the composition A.

Because it is composed of a random copolymer, it is possible to simplify the process because the polymerization reaction can occur without difficulty even if the weight ratio of mixing is not precisely weighed, and thus the manufacturing cost can be reduced, and the mass production can be performed at a higher speed. Can be done. In addition, since the composition A is composed of a random copolymer, binary and tertiary copolymers may be formed, respectively, or binary and tertiary copolymers may be formed together.

As described above, the composition C is composed of binary or ternary random copolymers (hereafter binary / ternary random copolymers). That is, two or more selected from the composition A to synthesize the composition C through the compound B, the binary / ternary random copolymer is a different monomer repeats to form a covalent bond to form a copolymer, the monomers are disordered In this case, it is called a random copolymer. Therefore, since the composition C has randomly woven monomers having different molecular weights, the chain structure of the random copolymer is more coarse than that of the block copolymer or the graft copolymer. While more present inside the structure, the effect of higher elasticity and the ability to absorb external shocks can be further improved.

The polythiol in the composition A may use a plurality of polythiol compounds in combination. A polythiol compound can also be used individually by mixing two or more types.

In specific examples, bis (2-mercaptoethyl) sulfide, 2,5-dimercaptomethyl-1,4-dithiane, 1,3-bis (mercaptomethyl) benzene, 1,4-bis (mercapto Methyl) benzene, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaoundecan, 4,7-dimercaptomethyl-1,11-dimercapto-3 , 6,9-trithiaundecane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundane, 1,2-bis [(2-mercaptoethyl ) Thio] -3-mercaptopropane, 1,1,3,3-tetrakis (mercaptomethylthio) propane, pentaerythritol tetrakismercaptopropionate, pentaerythritol tetrakisthioglycolate, trimethylolpropane tris Thioglycolate), trimethylolpropane trismercaptopropionate, and more preferably bis (2-mercaptoethyl) sulfide, 2,5-bis (2-mercaptomethyl) -1,4-dithiane , 1,3-bis (mercaptomethyl) benzene, pentaerythritol tetrakisume Mercaptopropionate, may be selected from the group consisting of 1,2-bis [(2-mercaptoethyl) thio] -3-mercapto-propane, pentaerythritol tetrakis thioglycolate.

Hydrogenated polybutadiene diol in the composition A is one of the hydrogenated polyolefin structural units 1,3-butadiene, 1,3-pentadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 2-phenyl-1,3 -Butadiene, 2-propyl-1,3-butadiene, 1,3-heptadiene, 6-methyl-1,3-heptadiene, 1,3-hexadiene, 5-methyl-1,3-hexadiene, 2 And a structural unit obtained by hydrogenating a polydiene structural unit obtained by polymerizing at least one diene selected from, 4-hexadiene, 2,5-dimethyl-2,4-hexadiene and 1,3-octadiene. have. Preferred among these may include a structural unit obtained by hydrogenating a polybutadiene structural unit, a structural unit obtained by hydrogenating a polyisoprene structural unit, or a structural unit obtained by hydrogenating a poly (butadiene-isoprene) structural unit.

Although the hydrogenated polybutadiene diol of the said composition A has two or more hydroxyl groups in 1 molecule, it is preferable to have 2-4 hydroxyl groups. Moreover, it is preferable that the hydroxyl value of a hydrogenated polyolefin diol is 10-80 mgKOH / g, More preferably, it is 17-70 mgKOH / g, Especially preferably, it is 23-65 mgKOH / g. When the hydroxyl value of the hydrogenated polyolefin polyol compound is less than 10 mgKOH / g, the overall molecular weight and viscosity become too high, making handling difficult and causing problems in the synthesis afterwards. In addition, when the hydroxyl value of the hydrogenated polyolefin diol compound is larger than 80 mgKOH / g, the volume shrinkage rate at the time of synthesis becomes excessively large, or the cohesion force of the polymer is too high, and the adhesion performance of the polymer is not sufficiently exhibited, which may result in poor performance. In addition, polybutadiene diol has a low glass transition temperature value, and due to its high stereoregularity, it has excellent mechanical properties such as tensile properties and 300% modulus. As a fluorine compound can be uniformly mixed, there is an effect of improving the mechanical properties, such as improved adhesion when forming the adhesive for mobile devices.

In addition, the polydimethylsiloxane diol of the composition A includes a hydroxyl group at the terminal of the polydimethylsiloxane (PDMS), and may be included in a composition for waterproofing having excellent waterproofness and low moisture content.

Compound B may consist of compounds comprising isocyanates. Isocyanate compounds include toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate or naphthalene diisocyanate, 2,4-toliendiisocyanate, 2,6-toliendiisocyanate, 1,3-xylenedi Isocyanate, 1,4-xylene diisocyanate, 1,5-naphthalene diisocyanate, 2,4-triene diisocyanate, 2,6-triylene diisocyanate, 1,3-xylene diisocyanate, diphenylmethane-4,4- Diisocyanate, 3-methyl-diphenylmethane diisocyanate, methylene diphenyl diisocyanate (MDI), 1,6-hexanediisocyanate, isophorone diisocyanate, dicyclohexyl methane diisocyanate, hexamethylene diisocyanate, 1,3 Bis (isocyanatomethyl) cyclohexane and 1,4-bis (isocyanatemethyl) cyclohexane And it may be configured to include at least one or more selected from the group consisting of. In addition, it may be configured by further adding a curing agent if necessary. Isocyanates are hydrophobic and water-resistant, and because they impart the effect of lowering the moisture content of the composition including the same and improving the waterproofing performance, it is a preferable compound in further including the waterproofing performance in the impact-resistant polyurethane resin composition. have.

Examples of the curing agent include at least two functional groups such as isocyanate, amine, aziridine, and polyisocyanate curing agents. Examples of the isocyanate curing agent include methylene diphenyl diisocyanate, hexamethylene diisocyanate, and 4,4-dicyclohexyl methane. Diisocyanate, toluene diisocyanate, and the like, and examples of the polyisocyanate type include 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 4,4'-diisocyanatodiphenylmethane, xylene diisocyanate, Polyisocyanate compounds composed of trimers such as isophorone diisocyanate, or the polyisocyanate compound and ethylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, polyoxyethylene glycol, long chain higher alcohol Made by reacting with low molecular weight active hydrogen compounds The compound which has several isocyanate group terminal in a molecule | numerator is mentioned. In addition, excessive addition of the curing agent in the addition of the curing agent to the isocyanate needs to be careful in the addition of the curing agent because the worker may be cured at an unintentional time or more than the target.

Polythiol-introduced polyurethane resin composition according to an embodiment of the present invention may comprise at least one or more tackifiers. The tackifier is selected from the group consisting of hydroxyethyl acrylate (HEA), hydroxypropyl acrylate (HPA), hydroxybutyl acrylate (HBA) and hydroxyethyl methacrylate (2-HEMA). It is characterized by including a species or more. The tackifier may be one having a number average molecular weight of 200-10000, preferably a number average molecular weight of 200-3000, more preferably 300-1000 can be used. The tackifier may be added to the composition C obtained through the synthesis of the composition A and the compound B described above to impart or further enhance the adhesive performance.

In addition, the polyurethane resin composition having a high impact resistance according to an embodiment of the present invention may further include an acrylate-based adhesive composition for enhancing the adhesion. In general, the acrylate-based adhesive composition applied to the adhesive may include all, specifically, isobonyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentadiyl (meth) acrylate and combinations thereof, acrylic acid Rubbers such as alkyl ester resins, styrene-butadiene copolymers, polyisoprene rubbers and polyoxybutylene rubbers, polyvinyl ethers, silicones, maleimides, cyanoacrylate resins, vinylidene chloride and vinylidene fluoride Examples of the vinylidene halide resin and a fluorine-based (meth) acrylic resin containing these and a fluorine-containing alkyl acrylate polymer component include, but are not limited to.

Polyurethane adhesive resin composition comprising a rubber particle according to an embodiment of the present invention may include a rubber particle composed of a core-shell structure. Rubber particles help to improve the thickness performance of absorbing shock and forming the thickness, it is possible to obtain the effect of further improving the waterproof. The rubber particles have an average particle size of 100 to 1,000 nm, the core is a homopolymer of silicone, butadiene, isoprene, butadiene, isoprene, (meth) acrylonitrile, (meth) acrylate and polysiloxane elastomer, (meth) acrylate It may consist of at least one selected from the group consisting of a copolymer of butadiene-styrene, the shell surrounding the core is silicone, (meth) acrylate, methyl methacrylate, styrene, acrylonitrile, acrylic acid, ( It may consist of at least one selected from the group consisting of meth) acrylamide copolymer. The core of the rubber particles may be composed of an inelastic polymer or a polymer having low elasticity. Therefore, it is preferable that the elastic modulus of the shell is high. The reason for this is that the number of rubber particles in absorbing the impact can sufficiently absorb the amount of impact even by the thickness of the shell. If the core is not hard, the shape of the particles may collapse and become non-spherical. Therefore, the elastic modulus of the core needs to be lower than the elastic modulus of the shell. In addition, the shell may further comprise acid groups that are ionically crosslinked through metal carboxylate formation for stronger bonding with the core. The core is 50 to 85% by weight relative to the total 100% by weight of the rubber particles, the shell may be composed of 15 to 50% by weight.

In addition, a transparency accelerator may be further included in order to increase the elongation at break and increase the transparency for improving the aesthetic effect of the appearance. The epoxy ester (meth) acrylate may be reacted with phenylglycidyl ether and (meth) acrylic acid. Monofunctional epoxy ester (meth) acrylate, (methylphenyl) phenylglycidyl ether, and (meth) acrylic acid reacted with monofunctional epoxy ester (meth) acrylate, (t-butylphenyl) phenylglycidyl ether, and (meth Carbon number, such as monofunctional epoxy ester (meth) acrylate which made acrylic acid react, and monofunctional epoxy ester (meth) acrylate which made (ethylhexyl) glycidyl ether methyl (meth) acrylate and (meth) acrylic acid reacted (Meth) acrylate having an alkyl group of 1-30 may be included, and preferably, phenylglycidyl ether and (meth) acrylic acid are reacted. Monofunctional epoxy ester (meth) acrylate, (t-butylphenyl) phenylglycidyl ether, and (meth) which reacted a functional epoxy ester (meth) acrylate, (methylphenyl) phenylglycidyl ether and (meth) acrylic acid The aromatic epoxy ester (meth) acrylate of the monofunctional epoxy ester (meth) acrylate which made acrylic acid react is preferable. The addition of the clearing accelerator together with the tackifier improves the elongation at break and improves the transparency. Furthermore, the heat resistance of the surface can be increased, and the antifouling property and water repellency can be maximized. Improve.

The organic solvent for constituting the polyurethane resin composition having a high impact resistance according to an embodiment of the present invention may include all organic solvents that can be used to constitute a general adhesive composition, more specifically, acetone, methanol, ethanol, One or more selected from the group consisting of methyl ethyl ketone, toluene, ethyl acetate, butyl acetate, acetone, butyl carbitol, butyl carbitol acetate, butyl cellosolve, butyl cellosolve acetate, and terpineol Can be. It is preferable to include the solvent in less than 30 parts by weight with respect to 100 parts by weight of the total composition, and when more than 30 parts by weight of the solvent is included, the viscosity is low, there is a risk of flowing down during application to the substrate to form a tape, while the solvent is volatilized Bubbles may form on the surface. In addition, when applied to less than 30 parts by weight can be improved the impact resistance of the touch panel, and can absorb the printing step of the surface has excellent properties as an adhesive. Therefore, it is important to add a solvent amount not excessively.

In some cases, the composition A may comprise fluorine diol, for example, hexafluoro-2,3-bis (trifluoromethyl) butane-2,3-diol, 2,2,3, 3,4,4,5,5,6,6,7,7-dodecafluoro-1,8-octanediol or 3,3,4,4,5,5,6,6-octafluoro- It may include at least one or more selected from the group consisting of 1,6-hexanediol.

Polythiol-introduced polyurethane resin composition according to an embodiment of the present invention may further add an additive in a ratio of 0.1 to 10 parts by weight based on 100 parts by weight of the total composition, the additive is a leveling agent, antifoaming agent, stabilizer, oxidation Inhibitors, surfactants, ultraviolet absorbers. It may include at least one selected from humectants, rust inhibitors. In this case, as a specific example, the stabilizing agent may be a third amine such as diethylethanolamine or trihexylamine, hindered amine, organic phosphate, hindered phenol, gelatin, methylcellulose, hydroxy ethyl cellulose or hydroxypropyl cellulose. , Water-soluble polymers such as carboxymethyl cellulose, polyethylene glycol, polyoxyethylene-polyoxypropylene block copolymer, polyacrylamide, polyacrylic acid, polyacrylate, sodium alginate, polyvinyl alcohol partial saponified product, tricalcium phosphate, titanium oxide It may include any one or more of calcium carbonate, silicon dioxide, but is not limited thereto. In addition, the surfactant that may be added for dispersion stabilization may include any one or more of sodium dodecylbenzene sulfonate, sodium dialkyl sulfosuccinate ester, sodium lauryl sulfate or polyethylene glycol nonylphenyl ether, but is not limited thereto. It doesn't happen.

Polythiol-introduced polyurethane resin composition according to an embodiment of the present invention can be applied to the surface of the substrate to form an adhesive tape. The substrate is a group consisting of polyethersulfone, polyacrylate, polyether imide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulose tri acetate and cellulose acetate propionate It is characterized by including at least one or more from. It is preferable that the thickness of a base material is 50 micrometers-70 micrometers, and it has ductility and can facilitate storage, operation | work, and handling in a roll form. In addition, the tensile strength is preferably 0.3 to 1.5 Kgf / mm ² standard test standards of ASTM D638, ASTM D882, ISO527, KS M3006. In particular, the thinner the substrate, the higher the tensile strength needs to be. And, the shear adhesive strength (adhesive strength) is measured by the test standards of ASTM D-1002, ASTM D3163, KS M3734-2011, the shear adhesive strength may be 4 to 7 Kgf / cm ² , more preferably 5 to 6 Kgf / cm ² can be.

Hereinafter, preferred examples will be presented to aid in understanding the present invention. However, the following examples are only for the understanding of the present invention, and the present invention is not limited to the following experimental examples.

Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

[Production example]

Preparation Example 1 Preparation of Polythiol

2-mercaptoethanol (100 g, 1.28 mol) was added to a 2 L two-neck flask equipped with a condenser, and a 30% solution of sodium hydroxide (170.63 g, 1.28 mol) was slowly added dropwise at room temperature. Thereafter, the mixture was stirred for 0.5 hours while maintaining the reaction temperature at room temperature, and then heated to 60 ° C and slowly added dropwise 1,2-dichloroethane (53.71 g, 0.32 mol) dissolved in ethanol (100 g), followed by stirring for 6 hours. When the reaction was completed, after filtration, the solvent was removed under reduced pressure and filtered under reduced pressure again. Thereafter, thiourea (121.78 g, 1.60 mol) and concentrated hydrochloric acid (35%, 200.20 g, 1.92 mol) were added to the reaction solution obtained above, and the mixture was refluxed at 110 ° C for 10 hours. After the reflux reaction was cooled to room temperature, toluene was added, and ammonia water (168.81, 2.88 mol) was slowly added dropwise to hydrolyze at 75 ° C. for 1 hour. The product was cooled to room temperature and transferred to a separatory funnel to separate layers. At this time, the water layer was discarded, and the organic layer was washed once with concentrated hydrochloric acid, and then washed once with water, once with diluted ammonia water, and twice with water. The obtained organic layer was dried with MgSO ₄ , filtered under reduced pressure, and the reaction product was concentrated under reduced pressure to obtain a polythiol compound.

Preparation Example 2 Preparation of Random Copolymer Composition Comprising a Pair of Isocyanate (NCO) Functional Groups

50 to 80 parts by weight of a composition A containing polythiol, hydrogenated polybutadiene diol, polydimethylsiloxane diol, polypropylene glycol, and polyethylene glycol prepared in Preparation Example 1 was prepared. Composition A needs sufficient agitation prior to synthesis, and needs to be stirred at 50-100 rpm in a stirrer. As compound B, 2,4-toliendiisocyanate is added to composition A.

Here, Compound A is added to a stirrer capable of controlling the temperature, and then Compound B is added. The stirring speed is mixed at 200 to 300rpm and the temperature is maintained at 50 to 85 ℃ proceeds the polymerization reaction. In this case, B consists of random copolymers Therefore, even if the weight ratio to be mixed exactly is not enough basis weight is enough to proceed the polymerization reaction. That is, the weight of the grade which advances a normal polyurethane reaction with a composition A weight part is sufficient.
At this time, a condensation polymerization catalyst may be further added to promote the reaction, and the polymerization reaction time is performed for 2 to 3 hours by adding the condensation polymerization catalyst di-t-butylaluminum hydrate. This may form a random copolymer composition C comprising a pair of isocyanate (NCO) functional groups.

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Preparation Example 3 Preparation of Adhesive Composition Comprising Waterproof Polyurethane Oligomer

Rubber particles may be added to the composition obtained in Preparation Example 2 to prepare an adhesive composition comprising a waterproof polyurethane oligomer.
The production method of the rubber particles means that those skilled in the art can sufficiently infer technically. For example, the rubber particles of the core-shell structure use a suspension polymerization method which is generally used as a manufacturing method.
In this case, the rubber particles may have an average size of 100 to 1,000 nm, the core may include silicon, and the shell surrounding the core may include (meth) acrylate. In this case, the core is 60% by weight and the shell is 40% by weight relative to 100% by weight of the total rubber particles. The rubber particles are preferably included in less than 40 parts by weight based on 100 parts by weight of composition C. If it is 40 parts by weight or more, there is a fear that the process speed is slowed in forming the tape thereafter and the spray nozzles may be clogged. In addition, the ability to increase the thickness may cause a problem in forming a thin tape. And because the cost can be high, the price burden can occur. In addition, the silane treatment of the surface before the rubber particles are added, it is possible to form a plurality of silanol functional groups on the surface to form a stronger bond with the composition C. The reaction of mixing the rubber particles proceeds by stirring at 200 to 400 rpm in an environment of a temperature of 60 to 90 ℃.

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Preparation Example 4 Preparation of Polyurethane Acrylate Adhesive Composition

A waterproofing polyurethane acrylate adhesive composition may be prepared by adding a tackifier providing an acrylic group to the composition obtained in Preparation Example 3. 0.5 to 15 parts by weight of a tackifier based on 100 parts by weight of composition C. Composition C and the tackifier are synthesized by stirring in a stirrer at 200 to 500 rpm, the temperature is carried out a polymerization reaction in an environment of 60 to 90 ℃ to prepare an adhesive composition. Adhesion agents are provided with hydroxyethyl acrylate (HEA). In this case, the surface energy of the waterproof polyurethane acrylate may be 1 to 18 mN / m.

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Preparation Example 5 Preparation of Polyurethane Acrylate Oligomer

Other processes may be further included in order to better implement the structure of the random copolymer. A high pressure reactor made of stainless steel is purged with nitrogen, and again purged with carbon dioxide, followed by injecting a mixture of Composition A, Compound B, and an organic solvent. 0.5 mmol of di-t-butylaluminum hydrate was added to the catalyst, and carbon dioxide was charged with 5 atm. The reaction was carried out for 4 hours while maintaining the reaction temperature at about 70 to 80 ° C. Upon completion of the reaction, impurities are removed with water and water remaining with anhydrous magnesium is removed to form a random copolymer composition C comprising a pair of isocyanate (NCO) functional groups. The remaining steps to prepare a polyurethane acrylate adhesive composition in the same manner as in Preparation Examples 3 to 4.

Preparation Example 6 Preparation of Adhesive Tape for Mobile Devices Containing Polyurethane Acrylate Oligomer

The adhesive tape including the polyurethane acrylate adhesive composition obtained through Production Examples 1 to 5 is formed of a substrate and an adhesive layer comprising the composition. The adhesive layer may be applied to one side or both sides of the substrate, and the configuration is not limited.

The substrate is provided with a substrate comprising polyethylene terephthalate. It is preferable that the thickness of a base material is 50 micrometers-130 micrometers, and it has ductility and can facilitate storage, operation | work, and handling in roll form. In addition, the tensile strength is preferably 0.3 to 1.5 Kgf / mm ² and more preferably 0.4 to 1.0 Kgf / mm ² based on the standard test standards ASTM D638, ASTM D882, ISO 527, KS M3006. In particular, the thinner the substrate, the higher the tensile strength needs to be.

The order of manufacturing the adhesive tape may include preparing a substrate, performing a corona treatment on the surface of the substrate, forming an adhesive layer on the surface of the substrate, and winding the substrate on which the adhesive layer is formed in a roll form. And, if the adhesive layer is configured on both sides of the substrate can be configured to further include a release film on one side.

EXAMPLE

Examples 1 to 3

Examples 1 to 3 constituted a composition containing no rubber particles omitting Preparation Example 3 in order to verify the performance of the adhesive tapes prepared in Preparation Examples 1 to 6, thereby configuring the thicknesses of different adhesive layers. Examples 1 to 3 used a 50 μm thick polyethylene terephthalate (PET) substrate with a tensile strength of 0.8 Kgf / mm ² , and the adhesive layers were composed of 10, 15, and 20 μm, respectively.

Examples 4-6

Examples 4 to 6 constituted a composition including rubber particles to verify the performance of the adhesive tapes prepared in Preparation Examples 1 to 6, thereby configuring the thicknesses of different adhesive layers. In Examples 4 to 6, a 50 μm thick polyethylene terephthalate (PET) substrate having a tensile strength of 0.8 Kgf / mm ² was used, and the thicknesses of the adhesive layers were 10, 15, and 20 μm, respectively.

Comparative Examples 1 to 5

Comparative Examples 1 to 5 used commercially available double-sided tape for mobile devices, Comparative Example 1 is a double-sided tape having a thickness of 150㎛ 3M of the United States, Comparative Example 2 is a double-sided tape having a thickness of 250㎛ 3A of the United States, Comparative Example 3 is a double-sided tape having a thickness of 220 μm of Korea H company, Comparative Example 4 is a double-sided tape having a 300 μm thickness of Korea H company, and Comparative Example 5 is a double-sided tape having a 210 μm thickness of Japan G Company as a comparative example to compare the performance It was. Comparative Example 1 is a double-sided tape having the thinnest thickness while showing the best performance at present, and is commercially available at about twice the price of Comparative Examples 2 to 5.

Comparative Example 6

Comparative Example 6 was configured in the same manner as in Example 4 to Example 6, except that a composition containing no polythiol omitting Preparation Example 1 was configured.

Experimental Example

1. Impact resistance measurement

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and the window was placed on the printing surface on the assembly jig according to the Dupont test. Examples 1 to 6 and Comparative Examples 1 to 5 were attached to the polycarbonate adherend, and then the specimen was pressed using a compression jig. After crimping, the specimen was left at room temperature for 72 hours, and then the specimen was horizontally mounted on the DuPont tester test jig, and the potential energy (mJ) was measured when the window was dropped and the results are shown in Table 1 below.

2. Moisture permeability measurement

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and measured for moisture permeability according to ASTM D1653 standard in an environment of humidity of 90%, and the results are shown in Table 1 below. The unit of moisture permeability is g / m ² day.

3. Tensile strength measurement

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and prepared in a width of 1.0 mm and a length of 15 cm according to the method of ASTM D882, and the maximum force when the specimen was pulled up and down at a constant speed and broken was measured. It is shown in Table 1 below.

4. Shear adhesion strength

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared, bonded to a glass substrate, and after 30 minutes, the specimens were cut to a length of 15 Cm and a width of 1 Cm x 1 Cm to measure adhesion (peel strength) according to ASTM D1002. The results are shown in Table 1 below.

5. Holding force

Prepare Examples 1 to 6 and Comparative Examples 1 to 5 and attach the test piece with an adhesive area of 2.5 Cm x 2.5 Xm according to ASTM D-3654 standard, and then measure the time taken to apply the load and detach the tape. It is shown in Table 1 below.

6. Heat resistance

Prepare Examples 1 to 6 and Comparative Examples 1 to 5 and attach the test piece with an adhesive area of 2.5 Cm x 2.5 Cm according to ASTM D4498 standard, and measure the final desorption temperature when the temperature is raised under load. The results are shown in Table 1 below.

7. Adhesion

Prepare the Examples 1 to 6 and Comparative Examples 1 to 5 and measure the force measured when the test piece is forcibly peeled 90 degrees using a UTM device in accordance with ASTM D-3330 standard by attaching the test piece in a size of 2.5 cm width The results are shown in Table 1 below. The unit of force is force / width (Kgf / in).

8. Winding test

Examples 1 to 6 and Comparative Examples 1 to 5 were prepared and wound on a rod 2 cm in diameter at a constant speed to make sensory inspection easy. The test subjects were evaluated by five experts who performed the winding of the tape for more than five years.

Impact resistance
(mJ) Breathable
(g / m ² day) The tensile strength
(Kgf / mm ² ) Shear bond strength
(Kgf / cm ² ) retention
(min) Heat resistance
(℃) Adhesion
(Kgf / in) Winding
exam
(1-5) Example 1 1500 8 0.9 6 14000 160 2.6 One Example 2 1700 4 1.0 7 13000 160 2.7 One Example 3 1900 2 1.2 8 10000 160 2.5 3 Example 4 1700 5 1.0 7 14000 160 2.5 2 Example 5 2000 2 1.4 8 13000 160 2.6 2 Example 6 2200 One 1.5 9 10000 160 2.7 3 Comparative Example 1 1500 7 0.9 6 10000 130 2.1 2 Comparative Example 2 1200 6 1.3 6 10000 110 1.5 3 Comparative Example 3 1100 10 0.7 4 8000 110 1.8 2 Comparative Example 4 1000 9 0.8 3 7000 100 1.6 3 Comparative Example 5 1400 17 0.7 4 5000 110 1.9 2 Comparative Example 6 1000 19 0.5 3 4000 95 1.8 2

First, with respect to impact resistance, Examples 1 to 6 are superior to Comparative Examples 1 to 5 in comparison with Comparative Examples 1 to 5, except for Example 1. However, since the tape thickness of Example 1 is thinner than the tape thickness of Comparative Example 1, it can be said to be a satisfactory result. In addition, as the thickness of the adhesive layer is thicker, impact resistance may be further improved. The reason is that the adhesive layer is composed of a polyurethane acrylate oligomer formed of a random copolymer. Therefore, the thicker the adhesive layer, the thicker the layer capable of absorbing shock, so that the impact resistance is improved. Therefore, when the thickness of the base material is configured to be thin for the construction of a thin tape, it can be seen that the thickness of the adhesive layer can be compensated for. And the results of Examples 4 to 6 containing the rubber particles was able to obtain a better impact resistance results than Examples 1 to 3 not containing the rubber particles. Therefore, it can be confirmed that the rubber particles included for improving impact resistance effectively work on the present invention.

With respect to the moisture permeability, Examples 1 to 6 it can be confirmed that the results of the other examples except Example 1 is superior to Comparative Examples compared to Comparative Examples 1 to 5. More specifically, since the thickness of Example 1 was thinner than other examples, the water vapor transmission rate was slightly higher, but compared to Comparative Examples 3 to 5, the water vapor transmission rate was improved to a thinner thickness. can confirm. In addition, it was confirmed that the thicker the overall thickness, the lower the moisture permeability is easier to implement waterproof.

Subsequently, since the tensile strength depends on the thickness of the substrate, it can be seen that the tensile strength is slightly improved as the adhesive layer becomes thicker. However, in the case of Comparative Example 6 without polythiol, the same adhesive layer was compared with that of Example 1. Even with a thickness, the impact resistance was significantly reduced.

Next, the shear adhesion strength is proportional to the thickness of the adhesive layer, it can be seen that does not significantly affect the thickness of the substrate or the change in tensile strength of the substrate.

Subsequently, the adhesive holding force is maintained longer as the thickness of the substrate is thinner, and the longer the thinner thickness of the adhesive layer is maintained. This was inversely proportional to the weight of the tape, and when the adhesive layer was thick, the adhesive layer itself was torn off and the holding force was weakened. However, it can be confirmed that much more favorable results can be obtained compared with other comparative examples. Subsequently, heat resistance was about 30 degrees higher than that of the comparative example.

Although the adhesive force shows inconsistent results, in the case of the examples, the comparative results are shown in comparison with Comparative Example 6, and the thicker the thickness of the adhesive layer, the visually confirmed that the residue remains.

The winding test was confirmed to be affected by the thickness of the adhesive layer, the thickness of the substrate and the tensile strength of the substrate, Examples 4 to 6 containing the rubber particles felt somewhat uncomfortable winding, but the degree was not large.

Summarizing Examples 1 to 6, it is preferable that the thickness of the adhesive layer is 10 μm to 20 μm. However, when the adhesive layer is thicker than this, the thickness of the adhesive layer may be increased. It is preferable to constitute an adhesive layer.

Since the adhesive tape for a mobile device according to an embodiment of the present invention can be configured to a thickness of 80㎛ or less in the form of a double-sided tape form, by providing a variety of thickness to meet the needs of the user to provide an adhesive tape that meets the necessary requirements This is easy, and it is possible to configure both sides of the adhesive layer or to constitute a cross section, without limiting the shape.

Although the present invention has been described by specific embodiments such as specific components and the like, but the embodiments and the drawings are provided to assist in a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations can be made from these descriptions.

 Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, fall within the scope of the spirit of the present invention. will be.

Claims (12)

At least two or more selected from the group consisting of a polythiol comprising at least two functional groups, a pair of hydroxyl groups (-OH), and a hydrogenated polybutadiene diol, a polydimethylsiloxane diol, polypropylene glycol and polyethylene glycol A block copolymer composition C synthesized from a composition A comprising and a compound B comprising an isocyanate comprising a pair of isocyanate (NCO) functional groups;
Rubber particles having a core-shell structure and having an elastic modulus of the core lower than that of the shell; And
Polythiol-containing polyurethane adhesive resin composition comprising a tackifier;
The rubber particles have an average particle size of 100 to 10,000 nm,
The rubber particles are selected from the group consisting of homopolymers of silicone, butadiene, isoprene, butadiene, isoprene, (meth) acrylonitrile, (meth) acrylates and polysiloxane elastomers, and copolymers of (meth) acrylate-butadiene-styrene A core comprising at least one kind; And
A shell comprising at least one selected from the group consisting of silicone, (meth) acrylate, methyl methacrylate, styrene, acrylonitrile, acrylic acid, and (meth) acrylamide copolymers,
The core is 50 to 85% by weight based on 100% by weight of the total rubber particles, the shell is 15 to 50% by weight of the polyurethane adhesive resin composition in which polythiol is introduced.
The method of claim 1,
The polythiol is bis (2-mercaptoethyl) sulfide, 2,5-bis (2-mercaptomethyl) -1,4-dithiane, 1,3-bis (mercaptomethyl) benzene, pentaerythritol tetrakis Mercaptopropionate, 1,2-bis [(2-mercaptoethyl) thio] -3-mercaptopropane, pentaerythritol tetrakisthioglycolate, and at least one member selected from the group consisting of Polyurethane adhesive resin composition in which polythiol was introduced.
The method of claim 1,
The isocyanate compound,
2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, 1,5-naphthalene diisocyanate, 2,4-triylene diisocyanate, 2, 6-triene diisocyanate, 1,3-xylene diisocyanate, diphenylmethane-4,4-diisocyanate, 3-methyl-diphenylmethane diisocyanate, methylene diphenyl diisocyanate (MDI), 1,6-hexanedi Isocyanate, isophorone diisocyanate, dicyclohexyl methane diisocyanate, hexamethylene diisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane and 1,4-bis (isocyanatemethyl) cyclohexane Polythiol-introduced polyurethane adhesive resin composition comprising at least one or more.
The method of claim 1,
The tackifier is selected from the group consisting of hydroxyethyl acrylate (HEA), hydroxypropyl acrylate (HPA), hydroxybutyl acrylate (HBA) and hydroxyethyl methacrylate (2-HEMA). Polythiol-introduced polyurethane adhesive resin composition characterized by including a species or more.
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Adhesive tape for a mobile device comprising a; adhesive layer formed on the surface of the substrate at least one or more of the polyurethane adhesive resin composition according to any one of claims 1 to 4.
The method of claim 7, wherein
The substrate is polyethersulfone, polyacrylate, polyether imide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyvinyl chloride, polyimide, polycarbonate, cellulose tri acetate and cellulose acetate pro Adhesive tape for mobile devices, comprising at least one or more from the group consisting of cypionate.
The method of claim 8,
The adhesive tape has an impact resistance of 1500mJ to 3000mJ adhesive tape for a mobile device.
The method of claim 8,
The adhesive tape has a thickness of 80 μm or less, and a tensile strength of 0.90 to 1.50 kgf / mm ² .
The method of claim 8,
The substrate has a thickness of 20㎛ to 70㎛, the adhesive layer has a thickness of 10㎛ to 60㎛ adhesive tape for mobile devices.
The method of claim 8,
The adhesive tape is adhesive strength 2 to 10kgf / in, shear adhesive strength of 5 to 15kgf / cm ² , the holding force of 7,000 to 15,000min and heat resistance of the adhesive tape for mobile devices, characterized in that 120 to 200 ℃ range.

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