KR101724305B1 - Adhesive composition, adhesive tape comprising the adhesive composition and method for preparing the adhesive tape - Google Patents
Adhesive composition, adhesive tape comprising the adhesive composition and method for preparing the adhesive tape Download PDFInfo
- Publication number
- KR101724305B1 KR101724305B1 KR1020150118617A KR20150118617A KR101724305B1 KR 101724305 B1 KR101724305 B1 KR 101724305B1 KR 1020150118617 A KR1020150118617 A KR 1020150118617A KR 20150118617 A KR20150118617 A KR 20150118617A KR 101724305 B1 KR101724305 B1 KR 101724305B1
- Authority
- KR
- South Korea
- Prior art keywords
- adhesive
- weight
- parts
- crosslinking agent
- group
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C09J7/0217—
-
- C09J2205/10—
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The present invention relates to an adhesive composition which provides an adhesive force suitable for assembling household appliances and electronic apparatuses and an adhesive tape which can be easily released while using the adhesive composition. The adhesive tape comprises 100 parts by weight of an acrylic copolymer, Wherein the adhesive composition and the adhesive composition comprise 5 to 100 parts by weight of an acrylate resin, 0.01 to 5 parts by weight of a crosslinking agent, 0.01 to 10 parts by weight of a photopolymerization initiator, and 0.01 to 5 parts by weight of an additive, Wherein the substrate provides an adhesive tape having a tensile strength of 1-200 N / mm < 2 > and an elongation of 10-1500%.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive composition and a method for producing an adhesive tape and an adhesive tape using the adhesive composition. More particularly, the present invention relates to an adhesive composition which provides an excellent adhesive force suitable for assembly of household appliances, And more particularly, to an adhesive tape which can be easily separated without damaging the adhesive tape.
In recent large-area LCD and OLED panels, slimming of the product thickness and minimization of the bezel width are required. As a result, the back cover assembled to the panel and the rear surface thereof is fixed through a double-sided tape or the like and assembled into a set.
In addition, conventional LCD panels are also used to assemble panels and back covers to reduce costs and reduce the width of the bezel. The chassis is removed and panels and back covers are double-sided tape And is set.
Therefore, in assembling the panel and the back cover, it is required to manufacture a double-sided tape capable of supporting both the panel and the back cover to support the product self-load and satisfy stable physical properties in various living environments.
On the other hand, in OLED TVs, due to the low yield of panels, rework (reworking) processes, which reduce the back cover cost by regenerating the back cover assembled with the TV set, are being applied as essential processes in OLED TV manufacturing .
In the panel manufacturing process, a general double-sided tape is used for fixing the panel and the back cover. Such a conventional double-sided tape causes considerable difficulty in separating the back cover due to the strong adhesive force of the tape.
In the rework process of a conventional TV panel using a conventional double-sided tape, a panel and a back cover are opened using a physical device such as a compactor to secure a space of several millimeters, and a sharp tool such as a knife is inserted into the secured space Remove the adhesive portion of the tape.
Thereafter, when the adhesive portion of the tape is partially removed, the space between the panel and the back cover is further widened. Thereafter, the above process is repeated to remove the tape while securing the removal space. Thereafter, the adhesive remaining on the contact area between the tape and the panel and the back cover is further removed by physical and chemical means. Furthermore, physical damage to the adherend is likely to occur, and it is difficult to remove the tape cleanly due to the strong adhesion of the tape.
In order to solve the problem of difficulty in removing the adhesive for regenerating the back cover, a method of attaching the magnet pad to the inner surface of the back cover to reduce the adhesive force of the tape is applied. However, although the above method is relatively easy to attach and detach, the price of the magnetic pad is high, and the TV model except for the magnetic pad is produced due to the recent declining trend of the OLED TV price. As a result, Is still required.
Furthermore, a method of facilitating a set separating operation by injecting a functional additive capable of deteriorating the adhesive force of the adhesive tape to separate the panel and the back cover in the case of a set failure is introduced into the sealing portion of the assembly, It is necessary to perform additional processes such as addition of an injecting process of an additive and a cleaning process of an additive and also cause contamination of the TV module and additional damage of the electronic / electric parts due to the cleaning solution.
Accordingly, there is a strong demand for an attaching material which can be easily assembled and attached between the panel and the back cover, and which can easily seek for parts for repair and replacement when a rework process is required.
The present invention is to provide a structure of an adhesive composition and a tape capable of realizing a strong adhesive force and high reliability suitable for bonding and supporting components of home appliances such as TVs.
In addition, the present invention provides an adhesive tape which can easily separate the attached parts easily by pulling the adhesive tape when it is necessary to disassemble the product for repair such as replacement of household appliances I want to.
Furthermore, the present invention is intended to provide a method for producing an adhesive tape using the adhesive composition having high adhesion and high reliability.
The present invention provides, in one aspect, an adhesive composition comprising 100 parts by weight of an acrylic copolymer, 5-100 parts by weight of an acrylate resin, 0.01-5 parts by weight of a crosslinking agent, 0.01 to 10 parts by weight of an initiator and 0.01 to 5 parts by weight of an additive.
At this time, the adhesive composition preferably has a viscosity of 100-2000 cps, and may include an organic solvent in an amount such that the solid content is 10-50 wt%.
The organic solvent may be one or more selected from the group consisting of ketones, alcohols, esters, and aromatic hydrocarbons.
The acrylic copolymer may have a weight average molecular weight of 500,000 to 3,000,000 obtained by polymerizing a monomer composition comprising 0.1-20% by weight of a monomer containing a hydroxyl group and 0.1-20% by weight of a monomer containing a carboxyl group. At this time, the acrylate resin may be a mixture of adhesive acrylate resins containing a photo-curing or thermosetting compound. (Meth) acrylate containing a hydroxy group, a (meth) acrylate having 3 to 20 carbon atoms, a (meth) acrylate having 3 to 20 carbon atoms containing a carboxyl group and a (meth) Acrylate, or a mixture of two or more thereof.
On the other hand, the crosslinking agent may be one or more selected from the group consisting of a polyisocyanate crosslinking agent, an epoxy crosslinking agent, a melamine crosslinking agent, an aziridine crosslinking agent, a dialdehyde crosslinking agent and a metal chelating crosslinking agent.
The photopolymerization initiator may be one or more selected from the group consisting of acetophenone, benzoin ester, benzyl ketone, and ketone.
The additive may be selected from the group consisting of methyltrimethoxysilane, n-propyltrimethoxysilane, ethyltrimethoxysilane, n-butyltrimethoxysilane, n-hexyltriethoxysilane, phenyltrimethoxysilane, cyclohexyl Vinyltrimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, methyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, and vinyltriethoxysilane.
The present invention also provides an adhesive tape as another aspect, comprising a substrate and an adhesive layer coated on one or both sides of the substrate with the adhesive composition, wherein the substrate has a tensile strength of 1-200 N / mm < 2 & % Adhesive tape.
The substrate may be selected from the group consisting of polyvinyl chloride, vinyl, polyethylene, polypropylene, polyurethane, thermoplastic polyurethane, foamed polyurethane, polyester elastomer, nylon, neoprene, chloroprene, polyethylene terephthalate, amorphous polyurethane terephthalate and polyurethane terephthalate glycol ≪ / RTI >
The substrate may have a thickness in the range of 1 to 2000 mu m.
The adhesive layer may have an adhesive application amount of 5 to 500 g / m < 2 >.
One or both sides of the substrate may further include at least one primer layer selected from the group consisting of urethane, acrylic, copolymer polyester and silicone.
Further, the substrate may be one whose surface has been subjected to corona treatment.
Furthermore, a release film laminated on the surface of the adhesive layer may be further included.
In another aspect, the present invention provides a method for manufacturing an adhesive tape, wherein the adhesive composition is coated on one side or both sides of a substrate having a tensile strength of 1-200 N / mm < 2 & An adhesive coating step; And curing the adhesive to form an adhesive layer.
And a corona treatment step of corona treating the surface of the substrate before the adhesive coating step to treat the surface energy state under the condition of 35-55 dyne / cm.
In addition, the substrate may further include a step of forming a primer coating layer with a primer selected from the group consisting of urethane, acrylic, copolymer polyester and silicone before the adhesive coating step.
On the other hand, the curing can be performed by thermosetting or photo-curing.
Further, the method may further include the step of laminating a release film on the adhesive layer.
The adhesive composition according to the present invention not only provides an excellent adhesive force of 500 gf / inch or more, but also has a high reliability of high temperature and high temperature and high humidity, and is less likely to transfer the adhesive layer to the surface of the adherend.
On the other hand, the adhesive tape to which the adhesive composition of the present invention is applied makes it possible to more easily remove the adhesive tape by using the base material having high stretchability and excellent tensile strength, while providing excellent adhesive force and tape reliability, .
1 is a view conceptually showing a principle of removing an adhesive tape from an adherend to which an adhesive tape is applied according to an embodiment of the present invention.
2 shows a cross-sectional structure of a single-sided tape in which an adhesive layer is formed on one side of a substrate and a release film is laminated on the adhesive layer, according to an embodiment of the present invention.
3 is a cross-sectional view of a single-sided tape having a primer layer formed between a substrate and an adhesive layer according to another embodiment of the present invention.
4 shows a cross-sectional structure of a double-sided tape in which an adhesive layer is formed on both surfaces of a base material and a release film is laminated on the outermost surface, according to another embodiment of the present invention.
5 illustrates a cross-sectional structure of a double-sided tape having a primer layer formed between a substrate and an adhesive layer according to another embodiment of the present invention.
An adhesive composition is provided according to one embodiment of the present invention. A double-sided tape or the like is used for joining and supporting components of home appliances such as TVs. Such double-sided tape should have a strong adhesive force suitable for bonding and supporting between the parts. On the other hand, when it is necessary to disassemble the product for the purpose of reusing the parts joined by the tape or the like or replacing or repairing the parts of the present invention, it is necessary to pull out the upper double-sided tape or the like, It is more preferable to have the property that the decomposition process can be performed more easily.
Accordingly, it is an object of the present invention to provide an adhesive composition having a strong bonding force, and further, to provide an adhesive tape which provides easier releasability even though the adhesive is applied.
The adhesive of the present invention is required to have a strong adhesive force so as to maintain bonding and support between the parts. Hereinafter, an adhesive composition according to an embodiment of the present invention capable of providing a strong adhesive force will be described.
The adhesive composition for the implementation of the present invention comprises an acrylic copolymer. The acrylic copolymer is a component which provides an adhesive force in an adhesive composition.
The acrylic copolymer includes 0.1-20% by weight of an acrylate monomer containing a hydroxyl group, 0.1-20% by weight of an acrylic acid monomer containing a carboxyl group, and the remaining acrylic methacrylate monomer and acrylate monomer composition is polymerized As the copolymer, the acrylate monomer containing a hydroxy group and the acrylic acid monomer containing a carboxyl group serve to impart an adhesive force.
The acrylic copolymer may have a weight average molecular weight in the range of 500,000 to 3,000,000. When the weight average molecular weight is less than 500,000, the adhesive strength is not sufficient and it is difficult to secure the reliability of the adhesive. When the weight average molecular weight exceeds 3,000,000, the workability is lowered due to the high viscosity. More preferably, an acrylic copolymer having a weight average molecular weight in the range of 1,000,000 to 2,500,000 can be used.
The adhesive of the present invention comprises an acrylate resin. The acrylate resin is a component which provides an adhesive force in an adhesive, and the acrylate resin is, for example, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, or 2-hydroxyethyl methacrylate (Meth) acrylates having 3 to 20 carbon atoms, such as carboxyl group-containing acrylate, carboxyl group-containing (meth) acrylates having 3 to 20 carbon atoms, Ester methacrylate and (meth) acrylate of hydrogen halide 3-20 can be used. They may be used singly or in combination of two or more.
By using an acrylate resin containing a hydroxy group, it is possible to provide an additional controlling function of the adhesive force of the adhesive and to improve the reliability of the adhesive by forming the crosslinking of the acrylate resin in the adhesive matrix. As a result, Acrylate is more preferable.
The acrylate resin is preferably contained in an amount of 5 to 100 parts by weight based on 100 parts by weight of the acrylic copolymer. When the content of the acrylate resin is less than 5 parts by weight, the adhesive strength is insufficient and the adhesive strength and bonding force between the parts can not be provided. When the content exceeds 100 parts by weight, the content of the acrylic copolymer for imparting adhesiveness is relatively small The adhesive strength is relatively strong, which may make it difficult to remove the adhesive during the regeneration work for reusing the parts. Therefore, it is preferable that the acrylate resin is contained in the content within the above-mentioned range, more preferably 10 to 50 parts by weight.
The adhesive composition of the present invention includes a crosslinking agent. The crosslinking agent may be a thermosetting or photocurable compound, and may be suitably used in the present invention as long as it is commonly used in the art. Examples include, but are not limited to, polyisocyanate-based crosslinking agents such as toluene diisocyanate, methylene diphenyl diisocyanate, and hexamethylene diisocyanate; Epoxy-based crosslinking agents such as bisphenol A, ethylene glycol glycidyl ether, trimethylol propane triglycidyl ether, diglycidyl aniline and diglycidyl amine; Melamine-based crosslinking agents such as methylol melamine, alkoxymethyl melamine and alkoxyethyl melamine; N, N'-diphenylmethane-4,4'-bis (1-aziridine carboxamide), N, N'- Aziridine crosslinking agents such as bisisophthaloyl-1- (2-methyl aziridine), tri-1-aziridinylphosphine oxide; Dialdehyde-based crosslinking agents such as glyoxal, malondialdehyde, succinodialdehyde, glutaraldehyde, maleindialdehyde and phthalaldehyde; Metal chelating crosslinking agents such as compounds for charging polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickel, magnesium, antimony and chromium into acetylacetone or ethyl acetoacetate, Or two or more of them may be used in combination.
The crosslinking agent may be contained in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the acrylic copolymer. When the content of the crosslinking agent is less than 0.01 parts by weight, the curing performance is deteriorated. When the amount is more than 5 parts by weight, the adhesive strength is decreased due to overcuring, and the workability is lowered. Therefore, it is preferable to use a crosslinking agent in the above range, more preferably 0.1 to 2 parts by weight.
The adhesive of the present invention also includes a photopolymerization initiator. The photopolymerization initiator is an agent for generating an active radical necessary for polymerization upon irradiation with light. The photopolymerization initiator is not particularly limited, and examples thereof include 2-methyl- (4-methylthio) phenyl- 2-methyl-1-phenylpropan-1-one, 1- (4-isopentyl) 2-methylpropan-1-one, 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy- -Acetophenone type such as 1-hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-2-phenylacetophenone and 2,2-diethoxy-2-phenylacetophenone; Benzoin esters such as benzoin,? -Methylolbenzoin,? -T-butylbenzoin, and benzoin methyl ester; A ketone-based photopolymerization initiator such as alpha-hydroxy ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone and 1-hydroxy-cyclohexyl phenyl ketone, Any of these may be used alone, or two or more of them may be used in combination.
The photopolymerization initiator preferably includes an amount of 0.01-10 parts by weight based on 100 parts by weight of the acrylic copolymer. If it is contained in an amount of less than 0.01 part by weight, the curing performance is not sufficient and there is a fear of lowering the reliability. When the amount of the photopolymerization initiator is insufficient to cause the photocuring reaction to be insufficient, the acrylate resin contained in the adhesive matrix is present in a state where the crosslinking is not formed in the polymer chain. Migration of the adhesive to the adherend occurs. On the other hand, if the amount is more than 10 parts by weight, workability may be reduced due to over-curing, and the photopolymerization initiator, which is also excessively charged, may cause a decrease in reliability of migration from the inside to the outside of the adhesive. not. More preferably 1-5 parts by weight.
On the other hand, the adhesive composition of the present invention further includes an organic solvent. Examples of the organic solvent include, but are not limited to, ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; Alcohols such as methanol, ethanol, propanol, butanol and isopropyl alcohol; Esters such as ethyl acetate, butyl acetate and the like; And organic solvents such as aromatic hydrocarbons such as toluene and xylene. One or a mixture of two or more selected from these may be used.
The organic solvent has an influence on the workability in application to the substrate and the thickness of the adhesive layer, and it is preferable that the organic solvent includes 10 to 50% by weight of the solid content in the whole composition. More preferably, the adhesive composition of the present invention may have a viscosity ranging from 100 to 3000 cps. If the content of the organic solvent is less than 10% by weight of the total composition, the flowability is poor and uniform application of the adhesive becomes difficult, and if it exceeds 50% by weight, There is a possibility that the physical properties of the substrate may deteriorate. Even more preferably, the composition may have a viscosity of 500-1500 cps.
In addition, the adhesive composition of the present invention may further comprise suitable additives as long as they do not impair performance as an adhesive. Examples of such an additive include an anti-blocking agent and a slip agent for preventing blocking with a substrate. For example, as the anti-blocking agent, PMMA beads, PS (poly styrene) beads, PU (polyurethane) beads, silica beads, silicon beads, and the like can be used.
Further, the adhesive composition of the present invention may further comprise a silane coupling agent. Examples of the silane coupling agent include methyltrimethoxysilane, n-propyltrimethoxysilane, ethyltrimethoxysilane, n-butyltrimethoxysilane, n-hexyltriethoxysilane, phenyltrimethoxysilane, cyclohexyl Vinyltrimethoxysilane, vinyltriethoxysilane, and the like, and a mixture of two or more selected from these may be used.
The additive may be suitably added within a range capable of realizing the function to be obtained by the addition, and the total amount of the additive is preferably in the range of 0.01-10 parts by weight.
The adhesive layer to which the adhesive according to the present invention is applied has adhesion of 500 gf / inch or more, high reliability at high temperature and high temperature and high humidity, and high reliability with less transition phenomenon of the adhesive layer to the surface of the adherend.
According to one embodiment of the present invention, there is provided an adhesive tape coated with such an adhesive. The adhesive tape may be a one-sided tape or a double-sided tape, but a double-sided tape is more preferable for bonding and supporting between the two parts.
The double-sided tape is for fixing parts and parts, and includes an adhesive layer coated with the adhesive composition on both sides of the substrate. At this time, the adhesive tape adhered and fixed to the parts is difficult to remove due to strong adhesive force, it causes physical damage to the adherend, or it is difficult to clean the adhesive tape due to the strong adhesive force of the tape.
The adhesive tape of the present invention solves this problem and aims to provide an effect that the adherend can be easily separated by removing the adhesive tape easily even in the state where the adherend is bonded. More specifically, the present invention relates to a method for removing an adhesive tape by dispersing and weakening an adhesive force formed between an adhesive tape and an adherend in an elongated portion when an end of the adhesive tape is pulled by applying a base material having a high elongation as an adhesive tape positioned between adherends, .
The principle of removal of the tape according to the present invention will be described with reference to Fig.
As shown in Fig. 1, the adhering material and the tape separation procedure of the present invention occur as "stretching of the base material - separation of the shearing-adhesion layer of the adhesive layer ". The base layer has a stretching property that stretches without breaking in a stretching length range that is constant than the original length when a tensile force is exerted by an external force in an originally adhered assembled state.
The adhesive layer has a thickness, and can be subdivided into a center portion and a surface to be adhered. At this time, the strength of the adhesive force can be divided by the tensile breaking strength Fc at the center of the adhesive layer, the adhesive force Fs at the surface of the adherend, and the adhesive force F B at the surface with the substrate, When tensile force is applied, it is increased from L to L ', and the adhesive layer is cracked first in the tensile direction beyond the elastic limit.
Assuming that the position where the adhesive layer is cracked is P and the length L of adhesion between the adhesive layer and the adhering material is infinitely small to the point P, adhesion at the point P can be defined as point bonding, The area of adhesion between the stretched substrate and the adhesive layer becomes L ".
The shear stress (τ) can be expressed by the following formula.
In the above equation,?: Shear stress, A: adhesion area, F: adhesion strength.
Therefore, the adhesive force Fs at the point P becomes infinitely small due to the decrease of the bonding area at L ", and becomes relatively infinitely smaller than the adhesive force F B between the substrate and the adhesive layer. And the adhesive force between the adhesive layer and the substrate, separation occurs on the adhesion surface with the adherend.
Therefore, in the present invention, it can be confirmed that the elongation and tensile strength of the substrate are indispensable factors for realizing the tape removal mechanism. That is, the higher the elongation percentage of the base material is, the better the tape removing performance is, and the tensile strength is also a factor affecting the removing power of the tape.
More specifically, the adhesive composition of the present invention, which uses a fabric having a tensile strength and an elongation percentage of the base material defined in the present invention, is excellent in compatibility with a base material, By applying the adhesive layer on the substrate, the tape can be removed from the surface of the adherend without remaining the adhesive.
Further, when the surface of the base material is pretreated by primer coating, corona treatment, or the like on the surface of the base material, the reliability of the tape can be further improved, thereby minimizing the adhesive residue remaining on the surface of the base material can do.
Therefore, an adhesive tape substrate suitable for use in manufacturing the adhesive tape of the present invention, that is, a substrate of an adhesive tape to which an adhesive is applied on the surface thereof, preferably has an elongation of 10-1500% , And more preferably 300% or more.
On the other hand, the base material suitable for the production of the adhesive tape of the present invention preferably has a tensile strength in the range of 1-200 N / mm < 2 >. When the tensile strength of the substrate is less than 1 N / mm < 2 >, when the adhesive tape is pulled out to be removed, the adhesive tape is broken due to strong adhesive force of the adhesive, On the other hand, if it is more than 200 N / mm 2, it is not easy to remove the tape by the force, and there is a great possibility of damaging the adherend such as deformation of the adherend when removing with a strong force. Therefore, as the tensile strength of the substrate, a substrate having a tensile strength of preferably 10-100 N / mm < 2 >, most preferably 20-50 N / mm < 2 >
On the other hand, as long as it has the elongation and tensile strength as described above, the type of the substrate is not particularly limited, and examples thereof include polyvinyl chloride (PVC), polyethylene (PE), polyethylene, polypropylene Polyurethane, PU, thermoplastic polyurethane, foamed polyurethane, polyester elastomer, nylon, neoprene, chloroprene, polyethylene terephthalate (PET) polyethyleneterephthalate, amorphous polyethylene terephthalate (APET), polyethylene terephthalate glycol (PETG), and the like.
Although the substrate is not particularly limited, a substrate having a thickness of 1 to 2,000 mu m can be used, and a substrate having a thickness of 30 to 500 mu m is more preferable.
An adhesive layer is formed on the substrate by applying any one of the above-mentioned adhesive compositions according to one embodiment of the present invention to both surfaces of the substrate using the substrate as the substrate of the adhesive tape. When the adhesive composition is applied onto the substrate, it can be applied in an amount within a range of 5-100 g / m 2, more preferably 20-60 g / m 2, and even more preferably 20-50 g / m 2 .
The adhesive layer may be formed by a variety of methods including, but not limited to, Comma Coating, Slot Die Coating, Gravure Coating, Micro Gravure Coating, Reverse Kiss Coating, Reverse kiss Coating) and the like.
When the adhesive layer of the present invention is formed by the above-described coating method, it is preferable to coat the adhesive layer at a speed of about 1-30 mpm. When the coating is performed at a speed of less than 1 mpm, wrinkles are formed on the substrate, so that the appearance of the coated surface is poor and the coiling is likely to occur. When the coating is performed at a production speed of 30 mpm or more, the volatilization of the solvent in the adhesive layer is insufficient, Unrecorded layers may lower the reliability of the adhesive tape, lower the adhesive strength, and may also cause deterioration of the appearance quality.
In forming the adhesive layer on the substrate, it is more preferable for the surface of the substrate to be activated by corona treatment to form the adhesive layer, if necessary. It is more preferable that the activation of the substrate surface by the corona treatment is performed so that the surface energy state is in the range of 35-65 dyne / cm.
Further, a primer coating layer may be formed between the substrate and the adhesive layer, if necessary, on the substrate surface. The primer coating layer can further improve the compatibility between the adhesive layer and the substrate, thereby ensuring the reliability of the adhesive tape. The primer coating layer may be formed directly on the substrate, or may be performed after the corona treatment.
The primer coating layer can be applied in the present invention as commonly used in this technical field. For example, a urethane resin containing a polyester polyol, an acrylic acid-based polymer, an acrylic resin containing a silane coupling agent, .
The above-mentioned adhesive composition is used to coat the surface of the substrate or the surface of a primer-treated substrate to form a coating layer. As a method of applying the adhesive composition on the substrate, a commonly used coating layer forming method can be applied, and a method of forming an adhesive layer can be applied.
Furthermore, a release film may be laminated on the adhesive layer of the present invention, if necessary, after which the film may be wound and stored. The release film is not particularly limited and may be suitably used in the present invention as long as it is commonly used in the technical field to which the present invention belongs.
The adhesive tape according to the present invention may be a single-sided tape having an adhesive layer formed on only one side of the substrate as shown in Figs. 2 and 3 in cross-sectional structure. Specifically, according to Fig. 2, an adhesive layer is formed on one side of the substrate, and a release film can be adhered on the adhesive layer. On the other hand, as shown in Fig. 3, a primer layer is formed on one surface of the substrate, and an adhesive layer and a release film may be sequentially formed on the primer layer. Although not specifically shown in the drawings, the surface of the substrate may be corona treated.
On the other hand, the adhesive tape according to the present invention may be a double-sided tape having an adhesive layer formed on both surfaces of the substrate as shown in Figs. 4 and 5 in cross-sectional structure. As shown in Fig. 4, it may be a double-sided tape having a cross-sectional structure of a double-sided tape in which an adhesive layer is formed on both surfaces of the substrate and a release film is laminated on the outermost surface. Sided tape in which a primer layer is formed and an adhesive layer and a release film are formed on the primer layer. The surface of the substrate may be corona treated as described above.
Example
Hereinafter, the present invention will be described more specifically with reference to examples. The following examples are illustrative of the present invention, and the present invention is not limited thereto.
Example 1 to 3 and Comparative Example 1-2
Adhesive coating liquids each having a composition shown in Table 1 below were coated on upper and lower surfaces of a polyester elastomer (thickness 200 mu m) at a thickness of 30 mu m using a comma coater, followed by hot air drying and then curing 4 < / RTI >
(Weight average molecular weight = 1.5 million)
The properties and properties of the double-faced tape produced in each of the examples and comparative examples in Table 1 were measured for the evaluation items shown in Table 2, and the results are shown in Table 3. The evaluation standard and method for each evaluation item are as shown in Table 2.
(Reworkability)
After 24 hours, tape is removed and evaluated.
At this time, the degree of removal of the tape is evaluated
As can be seen from the above Table 3, the adhesive compositions of Examples 1 to 3 according to the present invention exhibited excellent adhesive strength in the case of a double-sided tape using a base material having a tensile strength and elongation in the range of the present invention as a base material The adhesive layer does not remain even under high temperature and high humidity, so that the regeneration workability is excellent.
Claims (22)
100 parts by weight of an acrylic copolymer having a weight average molecular weight of 1,000 to 2,500,000 which is obtained by polymerizing a monomer composition containing 0.1-20% by weight of a monomer containing a hydroxyl group and 0.1-20% by weight of a monomer containing a carboxyl group,
10 to 20 parts by weight of an acrylate resin, 0.1 to 2 parts by weight of a crosslinking agent, 1 to 5 parts by weight of a photopolymerization initiator, and 0.01 to 5 parts by weight of an additive, based on 100 parts by weight of the acrylic copolymer,
(Meth) acrylate having 3 to 20 carbon atoms and a (meth) acrylate having 3 to 20 carbon atoms and a carboxyl group-containing (meth) acrylate having 3 to 20 carbon atoms Lt; RTI ID = 0.0 > acrylate < / RTI &
The crosslinking agent may be one or more selected from the group consisting of an epoxy crosslinking agent, a melamine crosslinking agent, an aziridine crosslinking agent, a dialdehyde crosslinking agent and a metal chelating crosslinking agent,
The photopolymerization initiator may be one or more selected from the group consisting of acetophenone-based, benzoin ester-based, benzylketone-based, and ketone-
The additive is selected from the group consisting of methyltrimethoxysilane, n-propyltrimethoxysilane, ethyltrimethoxysilane, n-butyltrimethoxysilane, n-hexyltriethoxysilane, phenyltrimethoxysilane, cyclohexylmethyimethoxy Silane, vinyltriclorosilane, vinyltrimethoxysilane, and vinyltriethoxysilane, and at least one member selected from the group consisting of vinyltrimethoxysilane,
Wherein the substrate has a thickness of 30 to 500 탆, a tensile strength of 20 to 50 N / mm 2 and an elongation of 300 to 1500%.
A primer coating step of forming a primer coating layer on the surface of the corona-treated substrate with a primer selected from the group consisting of urethane, acrylic, copolymer polyester and silicon;
An adhesive coating step of coating an adhesive composition on the primer coating layer; And
Curing the adhesive to form an adhesive layer
Wherein the adhesive composition comprises
100 parts by weight of an acrylic copolymer having a weight average molecular weight of 1,000 to 2,500,000 which is obtained by polymerizing a monomer composition containing 0.1-20% by weight of a monomer containing a hydroxyl group and 0.1-20% by weight of a monomer containing a carboxyl group,
10 to 50 parts by weight of an acrylate resin, 0.1 to 2 parts by weight of a crosslinking agent, 1 to 5 parts by weight of a photopolymerization initiator and 0.01 to 5 parts by weight of an additive, based on 100 parts by weight of the acrylic copolymer,
(Meth) acrylate having 3 to 20 carbon atoms and a (meth) acrylate having 3 to 20 carbon atoms and a carboxyl group-containing (meth) acrylate having 3 to 20 carbon atoms Lt; RTI ID = 0.0 > acrylate < / RTI &
The crosslinking agent may be one or more selected from the group consisting of an epoxy crosslinking agent, a melamine crosslinking agent, an aziridine crosslinking agent, a dialdehyde crosslinking agent and a metal chelating crosslinking agent,
The photopolymerization initiator may be one or more selected from the group consisting of acetophenone-based, benzoin ester-based, benzylketone-based, and ketone-
The additive is selected from the group consisting of methyltrimethoxysilane, n-propyltrimethoxysilane, ethyltrimethoxysilane, n-butyltrimethoxysilane, n-hexyltriethoxysilane, phenyltrimethoxysilane, cyclohexylmethyimethoxy Silane, vinyltriclorosilane, vinyltrimethoxysilane, and vinyltriethoxysilane. ≪ Desc / Clms Page number 24 >
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150118617A KR101724305B1 (en) | 2015-08-24 | 2015-08-24 | Adhesive composition, adhesive tape comprising the adhesive composition and method for preparing the adhesive tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150118617A KR101724305B1 (en) | 2015-08-24 | 2015-08-24 | Adhesive composition, adhesive tape comprising the adhesive composition and method for preparing the adhesive tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170023461A KR20170023461A (en) | 2017-03-06 |
| KR101724305B1 true KR101724305B1 (en) | 2017-04-18 |
Family
ID=58399084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150118617A KR101724305B1 (en) | 2015-08-24 | 2015-08-24 | Adhesive composition, adhesive tape comprising the adhesive composition and method for preparing the adhesive tape |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101724305B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11017199B2 (en) | 2018-06-07 | 2021-05-25 | Samsung Display Co., Ltd. | Display device with integrated sensor opening |
-
2015
- 2015-08-24 KR KR1020150118617A patent/KR101724305B1/en active IP Right Grant
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11017199B2 (en) | 2018-06-07 | 2021-05-25 | Samsung Display Co., Ltd. | Display device with integrated sensor opening |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170023461A (en) | 2017-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102046779B1 (en) | Double coated tape exhibiting improved reworkable capability | |
| JP7036715B2 (en) | Double-sided adhesive tape | |
| KR102088860B1 (en) | Reinforcing film, method for making device and reinforing method | |
| KR20110116976A (en) | Film and adhesive/bonding sheet | |
| JP2014047280A (en) | Surface protection sheet | |
| KR101552748B1 (en) | Pressure senstivie adhesive sheet | |
| CN107629712B (en) | Adhesive sheet | |
| JP7139141B2 (en) | Double-sided adhesive tape and laminate of thin film member and supporting member | |
| US20100104853A1 (en) | Foam tape | |
| KR101771515B1 (en) | Stretch releasing adhesive composition and double side adhesive tape including the same | |
| JP7227797B2 (en) | Machinability-enhancing film, laminate, and method of using machinability-enhancing film | |
| KR101724305B1 (en) | Adhesive composition, adhesive tape comprising the adhesive composition and method for preparing the adhesive tape | |
| KR20180026099A (en) | Adhesive film including inorganic filler for removing optical clear adhesives, method for preparing the same, and remove method of optical clear adhesives on touch screen panel | |
| JP6929175B2 (en) | Manufacturing method of three-dimensional molded product | |
| WO2018230323A1 (en) | Pressure-sensitive adhesive sheet and electronic appliance | |
| JP2008266591A (en) | Surface protection film roll and its continuous manufacturing method | |
| KR101715049B1 (en) | Multi-layered adhesive film for removing optical clear adhesives, preparing method of the same, and remove method of optical clear adhesives on touch screen panel | |
| JP2023054973A (en) | Adhesive tape and production method thereof, and article using the adhesive tape and dismantling method thereof | |
| JP6581694B1 (en) | Reinforcement film | |
| JP7108505B2 (en) | Machinability-enhancing film, laminate, and method of using machinability-enhancing film | |
| JP2017222085A (en) | Method for manufacturing optical laminate and optical laminate | |
| KR101938751B1 (en) | Stretchable foam adhesive tape exhibiting improved reworkability and manufacturing method thereof | |
| JP2020132659A (en) | Reinforcement film, manufacturing method thereof, manufacturing method of device and reinforcement method | |
| JP6595142B1 (en) | Reinforcing film and manufacturing method thereof, device manufacturing method, and reinforcing method | |
| JP6599039B1 (en) | Reinforcing film, device manufacturing method and reinforcing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| N231 | Notification of change of applicant | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20180621 Year of fee payment: 8 |