KR20170023602A - Double side tape and Display device comprising the same - Google Patents

Double side tape and Display device comprising the same Download PDF

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Publication number
KR20170023602A
KR20170023602A KR1020150118982A KR20150118982A KR20170023602A KR 20170023602 A KR20170023602 A KR 20170023602A KR 1020150118982 A KR1020150118982 A KR 1020150118982A KR 20150118982 A KR20150118982 A KR 20150118982A KR 20170023602 A KR20170023602 A KR 20170023602A
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KR
South Korea
Prior art keywords
weight
parts
double
thermoplastic elastomer
sided tape
Prior art date
Application number
KR1020150118982A
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Korean (ko)
Inventor
황용민
주훈석
정영진
김인섭
Original Assignee
(주)에이스텍코리아
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Priority to KR1020150118982A priority Critical patent/KR20170023602A/en
Publication of KR20170023602A publication Critical patent/KR20170023602A/en

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    • C09J7/0271—
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • 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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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)

Abstract

The present invention relates to a double-sided tape and a display device including the same. More specifically, the purpose of the present invention is to provide a double-sided tape which ensures low costs and favorable quality, and a display device including the same. According to the present invention, the double-sided tape comprises: a fabric layer including 100 parts by weight of an ethylene propylene diene terpolymer (EPDM) and 10-100 parts by weight of a thermoplastic elastic body; a first adhesive layer formed on a first side of the fabric layer; and a second adhesive layer formed on a second side of the fabric layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a double-sided tape and a display device including the double-

The present invention relates to a double-sided tape and a display device including the same.

Double-sided tape has been used for various purposes, and is especially used in conjunction with a liquid crystal panel and a touch panel in a smart phone or the like.

The double-sided tape is composed of a pressure sensitive adhesive layer positioned on both the single layer and the single layer, and the release film may be located outside the pressure sensitive adhesive layer. Such double-sided tapes are required to have low cost, excellent impact resistance, and ease of workability.

However, currently used fabrics have a problem of high unit cost.

Korean Registered Patent No. 10-1471361 (issued on December 11, 2014)

An object of the present invention is to provide a double-sided tape having a low unit cost and good quality and a display device including the same.

It is an object of the present invention to provide a double-sided tape comprising: an artificial layer comprising 100 parts by weight of EPDM and 10 to 100 parts by weight of a thermoplastic elastomer; A first pressure-sensitive adhesive layer formed on a first surface of the monolayer; And a second pressure-sensitive adhesive layer formed on a second surface of the monolayer.

The thermoplastic elastomer may include a propylene base elastomer.

The thermoplastic elastomer may be 20 to 40 parts by weight.

The surface of the monolayer may be corona treated.

The thermoplastic elastomer is an ethylene base elastomer, and may be 20 to 40 parts by weight.

Another object of the present invention is to provide a display device comprising: a display panel; A plate-like member positioned above the display panel; And a double-sided tape disposed between the display panel and the plate-like member, wherein the double-sided tape comprises: an artificial layer comprising 100 parts by weight of EPDM and 10 to 100 parts by weight of a thermoplastic elastomer; A first pressure-sensitive adhesive layer formed on a first surface of the monolayer; And a second pressure-sensitive adhesive layer formed on a second surface of the monolayer.

The thermoplastic elastomer may include a propylene base elastomer.

The thermoplastic elastomer may be 20 to 40 parts by weight.

The surface of the monolayer may be corona treated.

The plate-shaped member may include at least one of a touch panel and a transparent substrate.

INDUSTRIAL APPLICABILITY According to the present invention, there is provided a double-sided tape having a low unit price and good quality and a display device including the same.

1 is a cross-sectional view of a double-sided tape according to an embodiment of the present invention,
2 shows a display device according to an embodiment of the present invention.

1 is a cross-sectional view of a double-sided tape according to an embodiment of the present invention.

The double-sided tape 10 includes an antifouling layer 11, a first pressure-sensitive adhesive layer 12 and a second pressure-sensitive adhesive layer 13.

The monolayer 11 is made of EPDM and a thermoplastic elastomer. In addition, an additive capable of improving the quality of the artificial layer 10 such as an antioxidant may be further included.

The thermoplastic elastomer may be used in an amount of 10 to 100 parts by weight based on 100 parts by weight of EPDM. When the amount of the thermoplastic elastomer is less than 10 parts by weight, there arises a problem that the impact resistance is poor. When the amount of the thermoplastic elastomer is 100 parts by weight or more, there is a problem that the heat resistance is lowered and the deformation is increased. More specifically, 20 to 50 parts by weight, 20 to 40 parts by weight, 25 to 35 parts by weight or 25 to 40 parts by weight of the thermoplastic elastomer may be used.

As the thermoplastic elastomer, a propylene base elastomer or an ethylene base elastomer can be used, and in particular, a propylene base elastomer can be used. As the propylene base elastomer, Vistamaxx product of Exxon Mobil Corporation may be used. As the ethylene base elastomer, Lucene brand name of POE of LG Chem may be used.

As the pressure-sensitive adhesive layers 12 and 13, acrylic type pressure-sensitive adhesives may be used, but the present invention is not limited thereto.

The surface of the monolayer 11 may be corona treated.

The thickness t1 of the monolayer 11 may vary and may be, for example, from 40 to 650 um. The thicknesses t2 and t3 of the pressure-sensitive adhesive layers 12 and 13 may also be variously changed, and may be, for example, 20um to 150um each. The total thickness of the monolayer 11 and the adhesive layer 12, 13 may be 100 [mu] m to 800 [mu] m.

Although not shown, the double-sided tape 10 may further include a release film located outside the pressure-sensitive adhesive layers 12 and 13. The double-sided tape 10 may include another functional layer such as an impact absorption layer, and particles capable of performing various functions may be added to the raw layer 11 and / or the adhesive layer 12 or 13.

The double-sided tape 10 according to the present invention has a lower cost than the conventional double-sided tape using a PET-based single layer. Also, it is possible to produce only by the mixing and extrusion process, and the production process cost is also low.

The double-sided tape 10 according to the present invention can be used for various purposes, and particularly, can be used for a display device.

2 shows a display device according to an embodiment of the present invention.

The display device 1 includes a double-sided tape 10, a display panel 20, and a sheet-like member 30. The display panel 20 may be a liquid crystal panel or an OLED panel, but is not limited thereto. The sheet member 30 may be a touch panel or a transparent substrate, but is not limited thereto. The transparent substrate may be a glass substrate or a plastic substrate.

The double-sided tape 10 is disposed along the outer periphery of the display panel 20 and the sheet member 30 and bonds the display panel 20 and the sheet member 30 together. Specifically, the first pressure-sensitive adhesive layer 12 is in contact with the display panel 20 and the second pressure-sensitive adhesive layer 13 is in contact with the plate-like member 30. The place where the double-sided tape 10 is located may be a non-display area of the display panel 20. [

The display device 1 according to the present invention can be used for a television, a monitor, a notebook, a pad, a camera and a mobile phone.

Hereinafter, the present invention will be described in more detail by way of examples.

EPDM is a product of Lotte Chemical Co., and ethylene base elastomer is POE of LG Chem. The propylene base elastomer was a product of ExxonMobil.

The thermoplastic elastomer was varied from 0 to 40 parts by weight per 100 parts by weight of EPDM in 10 parts by weight, and the mixture was extruded to prepare a fabric. The fabric was corona treated and then acrylic type solvent type adhesive was applied on both sides. The thickness of the monolayer was 150 μm, and the thickness of each pressure-sensitive adhesive layer was 75 μm.

Appearance evaluation and drop test were carried out for each sample prepared.

Appearance evaluation was performed by observing the dots in light. Appearance evaluation is to see if the surface of the fabric is smooth and there are no protrusions or pits.

The drop test was performed to evaluate the impact resistance (impact strength) of the double-sided tape. The SUS plate and the PC plate were placed on both sides of the double-sided tape, and the tape was squeezed once with a 2 kg compression roller (moved at 300 mm / min) A sample was prepared. And then dropped at a height of 1.4 m to measure the number of drops when the falling test sample was separated. The drop test was performed three times for each sample.

Sample number Furtherance Exterior Drop test (3 times) Sample 1 Use EPDM only Great 100, 200, 150 Sample 2 EPDM 100: POE 20 usually 260, 160, 280 Sample 3 EPDM 100: POE 30 usually 600, 600, 600 Sample 4 EPDM 100: POE 40 usually 600, 600, 600 Sample 5 EPDM 100: PBE 20 Good 300, 240, 180 Sample 6 EPDM 100: PBE 30 Good 600, 600, 600 Sample 7 EPDM 100: PBE 40 Good 600, 600, 600

In Table 1, POE represents an ethylene base elastomer, and PBE represents a propylene base elastomer. In the drop test value, 600 means that the drop sample was not separated up to 600 times, and if the sample was not separated up to 600 times, the impact resistance was considered to be high enough to stop the experiment.

As a result of appearance evaluation, the appearance was the best when only EPDM (Sample 1) was used and the appearance was better than that when PBE was used (Sample 5 to Sample 7) than when POE was used (Sample 2 to Sample 4). However, when using PBE or POE, the appearance rating is usually higher than normal.

From the drop test results, it can be seen that the impact resistance is poor when only EPDM is used, and the impact resistance is remarkably improved by including 20 parts by weight of POE or PBE. Particularly, when the POE or PBE is contained in an amount of 30 parts by weight or more, the impact resistance is sufficiently secured.

In addition, the thickness of the single layer was changed to 50um and 100um, and the thickness of the adhesive layer was changed to 50um. Also, the content of the thermoplastic elastomer was increased to 100 parts by weight, and the result of the drop test was 600 times or more.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, those skilled in the art will appreciate that such specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereby. something to do. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (10)

In double-sided tapes,
100 parts by weight of EPDM and 10 to 100 parts by weight of a thermoplastic elastomer;
A first pressure-sensitive adhesive layer formed on a first surface of the monolayer;
And a second pressure-sensitive adhesive layer formed on a second surface of the distal layer. The method according to claim 1,
Wherein the thermoplastic elastomer comprises a propylene base elastomer. 3. The method of claim 2,
Wherein the thermoplastic elastomer is 20 to 40 parts by weight. The method of claim 3,
Wherein the surface of the monolayer is corona treated. The method according to claim 1,
Wherein the thermoplastic elastomer is an ethylene base elastomer, and the thermoplastic elastomer is 20 to 40 parts by weight. In the display device,
A display panel;
A plate-like member positioned above the display panel;
And a double-sided tape positioned between the display panel and the plate member,
The double-
100 parts by weight of EPDM and 10 to 100 parts by weight of a thermoplastic elastomer;
A first pressure-sensitive adhesive layer formed on a first surface of the monolayer;
And a second pressure-sensitive adhesive layer formed on a second surface of the monolayer. The method according to claim 6,
Wherein the thermoplastic elastomer comprises a propylene base elastomer. 8. The method of claim 7,
Wherein the thermoplastic elastomer is 20 to 40 parts by weight. 9. The method of claim 8,
And the surface of the far-end layer is corona-treated. The method according to claim 6,
Wherein the plate member comprises at least one of a touch panel and a transparent substrate.
KR1020150118982A 2015-08-24 2015-08-24 Double side tape and Display device comprising the same KR20170023602A (en)

Priority Applications (1)

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KR1020150118982A KR20170023602A (en) 2015-08-24 2015-08-24 Double side tape and Display device comprising the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150118982A KR20170023602A (en) 2015-08-24 2015-08-24 Double side tape and Display device comprising the same

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KR20170023602A true KR20170023602A (en) 2017-03-06

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101471361B1 (en) 2014-03-18 2014-12-11 (주)앤디포스 Double-sided tape for touch screen panel and manufacturing method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101471361B1 (en) 2014-03-18 2014-12-11 (주)앤디포스 Double-sided tape for touch screen panel and manufacturing method thereof

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