KR101698526B1 - Double-sided tape comprising a porous filler - Google Patents
Double-sided tape comprising a porous filler Download PDFInfo
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- KR101698526B1 KR101698526B1 KR1020160034588A KR20160034588A KR101698526B1 KR 101698526 B1 KR101698526 B1 KR 101698526B1 KR 1020160034588 A KR1020160034588 A KR 1020160034588A KR 20160034588 A KR20160034588 A KR 20160034588A KR 101698526 B1 KR101698526 B1 KR 101698526B1
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- South Korea
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- double
- sided tape
- adhesive layer
- weight
- porous filler
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- C09J7/021—
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- 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
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/06—Polyethene
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- C09J2201/128—
-
- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
The present invention relates to a double-sided tape excellent in impact resistance, tackiness, and waterproofness, and a method for producing the same.
In various electronic apparatuses, it is necessary to connect the components to each other. For example, it is necessary to connect the panel module of the touch screen with the liquid crystal module, or to bond the liquid crystal module and the device set. To this end, a conventional double-sided tape has been used for the miniaturization of portable devices. The double-sided tape basically consists of a base layer and an adhesive layer formed on both sides of the base layer.
The double-sided tape is required to have various physical properties in addition to the adhesive force for bonding the parts, and for example, the impact resistance, the heat resistance, and the waterproof property are sometimes required. Particularly, in the case of a component such as a touch screen in which a large-sized panel is exposed to the outside, it is required to have an impact resistance capable of withstanding an external impact, and accordingly, the use of a double-sided tape having impact resistance is required.
As a method for improving the impact resistance of the double-sided tape, for example, a method of including a separate layer having impact resistance in addition to the base layer and the adhesive layer as the basic constitution of the double-sided tape has been considered. However, the above-described method has a problem that the process is somewhat complicated in that the existing base layer and the adhesive layer are used as they are and the additional layer is additionally included.
In addition to the above methods, a method of including a filler for improving the impact resistance on the base layer and the adhesive layer, which are the basic constitution of the double-sided tape, has been considered. However, there is a problem in that interaction between the filler and the components of the base layer or the adhesive layer must be considered, and the degree of improvement in impact resistance varies depending on the filler, making it difficult to obtain desired impact resistance.
As a result of intensive efforts to improve the impact resistance, heat resistance and waterproofing property of the double-sided tape, the inventors of the present invention confirmed that the above-described conditions were satisfied when the porous filler having a specific shape was included in the adhesive layer as described later, .
The present invention is to provide a double-sided tape excellent in impact resistance, tackiness, and waterproofness. The present invention also provides a method for producing the double-sided tape.
In order to solve the above problems, the present invention provides a double-sided tape comprising the following constitutions:
A base layer;
A first adhesive layer formed on an upper surface of the substrate layer; And
And a second adhesive layer formed on a lower surface of the substrate layer,
Wherein the second adhesive layer comprises a porous filler,
Wherein the porous filler is made of polyethylene having a weight average molecular weight of 3,900,000 to 10,500,000 g / mol and having an average diameter of 10 to 60 占 퐉,
Double-sided tape.
Hereinafter, the present invention will be described in more detail.
The substrate layer
The base layer used in the present invention constitutes the base layer of the double-sided tape of the present invention, and a first adhesive layer and a second adhesive layer to be described later are formed on both sides of the base layer.
As the base layer, polyethylene terephthalate (PET) can be used. It is preferable that the thickness of the base layer is 25 占 퐉 to 75 占 퐉. In addition, the thickness of the base layer is adjusted depending on the product, and a thickness of 5% to 30% of the total double-sided tape thickness is suitable. And the physical properties (adhesive force, shear strength, holding force) developed according to the thickness change, and therefore can be suitably applied thereto. However, when the thickness of the base layer is more than 30% of the total double-sided tape thickness, the thickness of the pressure-sensitive adhesive layer is thinner than that of the base material, so that sufficient impact resistance may not be exhibited. When the thickness of the base layer is less than 5% There is a problem that the workability of the product is deteriorated.
Further, the double-sided tape according to the present invention can be used for a touch screen panel, and the base layer is preferably colored black so that a shading function can be imparted to the base layer. The coloring may be colored with a black coloring agent and is not particularly limited as long as it is a coloring agent used in the technical field according to the present invention. For example, carbon black, or iron sulfide.
1st Adhesive layer
The first adhesive layer used in the present invention is formed on the upper surface of the base layer, which is different from the second adhesive layer which will be described later.
The first adhesive layer includes a monomer capable of forming an adhesive layer, and can be formed into a film by UV curing. Examples of the monomer capable of forming the pressure-sensitive adhesive layer include monomers or additives (tackifiers, antioxidants, leveling agents, coupling agents, and the like) which can constitute ordinary pressure sensitive adhesives such as acrylic monomers, epoxy monomers, amide monomers, Can be used. For example, ethylhexyl acrylate, 2-hydroxyethyl acrylate, acrylic acid, isobutyl methacrylate, or a mixture thereof may be used.
The thickness of the first adhesive layer is preferably 10% to 80% of the thickness of the entire double-sided tape. If the thickness of the first adhesive layer is more than 80%, the thickness of the second adhesive layer may become too thin to reduce the adhesive force. If the thickness of the first adhesive layer is less than 10%, the adhesive strength is lowered, there is a problem.
In addition, the first adhesive layer may include a porous filler included in the second adhesive layer, which will be described later, if necessary.
Second Adhesive layer
The second adhesive layer used in the present invention is formed on the lower surface of the base layer, which is distinguished from the first adhesive layer.
When a double-sided tape is used as a double-sided tape for a touch screen panel, excellent impact resistance is required for protection of the touch screen. To this end, a method has been proposed in which a foamed foam base material is contained in a double-sided tape or a hollow microsphere is included, but it has been difficult to obtain a desired impact resistance.
Accordingly, the present invention is characterized in that impact resistance is improved by including a porous filler in the second adhesive layer. The second adhesive layer is prepared by mixing a monomer for forming the second adhesive layer and a porous filler, and UV-curing the mixture to form a film. At this time, the monomers penetrate into the fine pores of the porous filler, and as the result of UV curing in this state, a more rigid second adhesive layer can be formed.
Further, the porous filler is made of polyethylene having a weight average molecular weight of 3,900,000 to 10,500,000 g / mol and has an average diameter of 10 to 60 탆 so as to have sufficient impact resistance. As described above, polyethylene having a high weight average molecular weight is referred to as ultra-high-molecular-weight polyethylene (UHMWPE), and the porous filler used in the present invention is made of the above-mentioned material and can improve impact resistance. Further, by having a high specific surface area due to porosity, the monomer for forming the second adhesive layer can effectively penetrate into the inner pores of the porous filler. The specific gravity of the porous filler is preferably 0.5 to 1.5, more preferably 0.95 to 1.2.
On the other hand, as the monomer for forming the second adhesive layer, a monomer for forming the first adhesive layer described above may be used without limitation. Preferably, the monomer for forming the first adhesive layer and the monomer for forming the second adhesive layer are the same.
The porous filler is preferably 5 to 30% by weight based on the total weight of the second adhesive layer. When the amount is less than 5% by weight, the effect of improving the impact resistance is insignificant with the addition of the porous filler, and when it is more than 30% by weight, the impact resistance improving effect is not substantially increased.
As described above, the porous filler may also be added to the first adhesive layer. The weight average molecular weight, average diameter, specific gravity, and content of the porous filler are the same as those of the porous filler included in the second adhesive layer Can be applied.
The thickness of the second adhesive layer is preferably 10% to 80% of the total thickness of the double-sided tape. If the thickness of the second adhesive layer is more than 80% of the total thickness of the double-sided tape, the thickness of the double-sided tape becomes too thick. If the thickness of the second adhesive layer is less than 10% Not implemented.
Heterogeneous layer
In addition, the double-sided tape according to the present invention may further include a release layer on at least one of an upper surface of the first adhesive layer and a lower surface of the second adhesive layer.
Since the first adhesive layer and the second adhesive layer have adhesiveness, it is necessary to protect them with a release layer until they are actually used. The releasing layer is not particularly limited as long as it is used in the technical field to which the present invention belongs. For example, a PE film may be bonded to paper and silicone may be formed on the outer surface of the PE film.
Double-sided tape
The structure of the double-sided tape according to the present invention is schematically shown in Fig. 1, the double-sided tape 1 according to the present invention has a first
Further, the present invention provides a method for producing a double-sided tape according to the present invention, comprising the steps of: 1) forming a first adhesive layer on an upper surface of a base layer; And 2) forming a second adhesive layer on the lower surface of the substrate layer. At this time, constituent components of the base layer, the first adhesive layer and the second adhesive layer are as described above. In addition, the first adhesive layer and the second adhesive layer may be formed into a film form by applying the composition on the upper or lower surface of the base layer after preparing the composition in a syrup form.
The double-sided tape according to the present invention can be applied to various fields. Typically, it can be used as a double-sided tape for a touch screen panel. In this case, both modules can be bonded between the panel module and the liquid crystal module of the touch screen. Further, the double-sided tape according to the present invention is characterized by being excellent in impact resistance, tackiness, and waterproofness.
As in Examples and Comparative Examples to be described later, it was confirmed that the double-sided tape according to the present invention had significantly improved impact resistance as compared with the comparative example not including the porous filler.
As described above, the double-sided tape according to the present invention is characterized by being excellent in impact resistance, heat resistance and waterproofness by including a porous filler having a specific shape.
Fig. 1 schematically shows a structure of a double-sided tape according to the present invention.
2 shows a form of a double-sided tape used for evaluation of a double-sided tape according to the present invention.
Best Mode for Carrying Out the Invention Hereinafter, preferred embodiments are shown to facilitate understanding of the present invention. However, the following examples are intended to illustrate the present invention without limiting it thereto.
Example And Comparative Example : Double-sided tape Produce
Each mixture was prepared according to the composition shown in Table 1 below. Then, 0.1 part by weight of Micure CP-4 (Miwon specialty chemical) and 0.1 part by weight of a crosslinking agent were added to 100 parts by weight of the acrylic mixture to prepare black light Syrups were prepared which were partially photopolymerized using a lamp until a viscosity of 2500 CPS was reached to produce an adhesive sheet. The syrup was coated on a 25 탆 film (Black PET) subjected to printing treatment to prepare a cross-section tape having a first adhesive layer having a thickness of 150 탆.
2) M2: 2-hydro ethyl acrylate
3) M3: acrylic acid
4) M5: n-vinylpyrrolidone
Each mixture was prepared in the composition shown in the following Table 2, and 0.1 part by weight of Micure CP-4 (Miwon specialty chemical) and 0.1 part by weight of a crosslinking agent were added to 100 parts by weight of the mixture. Using a black light lamp having a wavelength of the UV-A region, a syrup was prepared which was partially photopolymerized until a viscosity of 1500 CPS or higher was reached. The syrup was coated on the other side of the first adhesive layer in the cross-section tape provided with the previously prepared first adhesive layer to prepare a double-sided tape having a total thickness of 300 탆.
(10 parts by weight)
2) M2: 2-hydro ethyl acrylate
3) M3: acrylic acid
4) M5: n-vinylpyrrolidone
5) GUR 2122 and GUR 4050 (Celanese), AEROSIL R972V (Evonik industries), F-80DE (Matsumoto Yushi-Seiyaku Cp.
Experimental Example : Double-sided tape Character rating
1) Evaluation of impact resistance
On the PC (polycarbonate) substrate (80 mm x 150 mm x 3 mm), the double-sided tapes prepared in the above Examples and Comparative Examples were cut to the same size as shown in Fig. 2 and then polymethyl methacrylate ) Substrate (50 mm x 150 mm x 3 mm (15)). After a pressure of 5 kg was applied on the PMMA substrate for 10 minutes, a weight of 500 g was dropped from the heights of the following Tables 3 to 7 to evaluate whether the PC substrate and the PMMA substrate fell off. In the following Tables 3 to 7, the case where both substrates are not separated is denoted by O, and the case where they are separated by X is shown.
The results of the conversion of the impact energy from the results of Tables 3 to 7 are shown in Table 8 below.
2) Waterproof evaluation
On the PC (polycarbonate) substrate (50 mm x 50 mm x 3 mm), the double-sided tape produced in Example 1 was cut and adhered to the same size as in Fig. An immersion paper for confirming waterproofing was put in the inner space of the double-sided tape, and a PMMA (polymethyl methacrylate) substrate (50 mm x 50 mm x 3 mm) was attached thereon. A sample was then prepared by applying a pressure of 5 kg on the PMMA substrate for 5 seconds. 3) A total of 3 samples were prepared, and then 1) left at room temperature for 72 hours, 2) left at 50 ° C and 90% relative humidity for 72 hours, and 3) left at -40 ° C for 2 hours, The time was left to stand for 18 times. Each sample was then placed in a water bath with a diameter of 450 mm and a height of 1.4 m for 72 hours. Each sample was then recovered to verify that the immersion paper was wet, and that the immersion paper was unchanged in all samples.
1: Double-sided tape
10: substrate layer
20: first adhesive layer
30: Second adhesive layer
31: Porous filler
40 and 50: release layer
Claims (10)
A first adhesive layer formed on an upper surface of the substrate layer; And
And a second adhesive layer formed on a lower surface of the substrate layer,
Wherein the second adhesive layer comprises a porous filler,
Wherein the porous filler is made of polyethylene having a weight average molecular weight of 3,900,000 to 10,500,000 g / mol and having an average diameter of 10 to 60 占 퐉,
Double-sided tape.
Wherein the first adhesive layer comprises a porous filler and the porous filler is made of polyethylene having a weight average molecular weight of 3,900,000 to 10,500,000 g / mol and an average diameter of 10 to 60 탆.
Double-sided tape.
Characterized in that the substrate layer is colored black.
Double-sided tape.
Wherein the base layer has a thickness of 25 to 75 占 퐉.
Double-sided tape.
Wherein the thickness of the first adhesive layer is 10% to 80% of the thickness of the entire double-sided tape.
Double-sided tape.
Wherein the specific gravity of the porous filler is 0.5 to 1.5.
Double-sided tape.
Wherein the porous filler is contained in an amount of 1 to 30% by weight based on the total weight of the first adhesive layer or the second adhesive layer.
Double-sided tape.
Wherein the monomer of the first adhesive layer and the monomer of the second adhesive layer are the same or different.
Double-sided tape.
Wherein the adhesive layer further comprises a release layer on at least one of an upper surface of the first adhesive layer and a lower surface of the second adhesive layer.
Double-sided tape.
Wherein the double-sided tape is a double-sided tape for a touch screen panel.
Double-sided tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160034588A KR101698526B1 (en) | 2016-03-23 | 2016-03-23 | Double-sided tape comprising a porous filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160034588A KR101698526B1 (en) | 2016-03-23 | 2016-03-23 | Double-sided tape comprising a porous filler |
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| Publication Number | Publication Date |
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| KR101698526B1 true KR101698526B1 (en) | 2017-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020160034588A KR101698526B1 (en) | 2016-03-23 | 2016-03-23 | Double-sided tape comprising a porous filler |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3518469B2 (en) * | 2000-03-01 | 2004-04-12 | 株式会社トンボ鉛筆 | Pressure-sensitive transfer adhesive tape |
| JP2013249367A (en) * | 2012-05-31 | 2013-12-12 | Hitachi Kasei Polymer Co Ltd | Double-sided pressure-sensitive adhesive tape |
| KR20150109302A (en) * | 2014-03-18 | 2015-10-01 | (주)앤디포스 | Double-sided tape for touch screen panel |
| KR20160002382A (en) * | 2014-06-30 | 2016-01-07 | 히다치 막셀 가부시키가이샤 | Double-sided adhesive tape and base material for double-sided adhesive tape |
-
2016
- 2016-03-23 KR KR1020160034588A patent/KR101698526B1/en active Search and Examination
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3518469B2 (en) * | 2000-03-01 | 2004-04-12 | 株式会社トンボ鉛筆 | Pressure-sensitive transfer adhesive tape |
| JP2013249367A (en) * | 2012-05-31 | 2013-12-12 | Hitachi Kasei Polymer Co Ltd | Double-sided pressure-sensitive adhesive tape |
| KR20150109302A (en) * | 2014-03-18 | 2015-10-01 | (주)앤디포스 | Double-sided tape for touch screen panel |
| KR20160002382A (en) * | 2014-06-30 | 2016-01-07 | 히다치 막셀 가부시키가이샤 | Double-sided adhesive tape and base material for double-sided adhesive tape |
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