CN117625073A - Adhesive film suitable for plastic image display device and image display device - Google Patents
Adhesive film suitable for plastic image display device and image display device Download PDFInfo
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- CN117625073A CN117625073A CN202311674597.3A CN202311674597A CN117625073A CN 117625073 A CN117625073 A CN 117625073A CN 202311674597 A CN202311674597 A CN 202311674597A CN 117625073 A CN117625073 A CN 117625073A
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- image display
- display device
- adhesive film
- adhesive
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 29
- 229920003023 plastic Polymers 0.000 title claims abstract description 19
- 239000004033 plastic Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 10
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 16
- WURBFLDFSFBTLW-UHFFFAOYSA-N benzil Chemical compound C=1C=CC=CC=1C(=O)C(=O)C1=CC=CC=C1 WURBFLDFSFBTLW-UHFFFAOYSA-N 0.000 claims description 13
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 12
- 238000006467 substitution reaction Methods 0.000 claims description 12
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 claims description 11
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 11
- 239000000178 monomer Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- IAXXETNIOYFMLW-COPLHBTASA-N [(1s,3s,4s)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@]2(C)[C@@H](OC(=O)C(=C)C)C[C@H]1C2(C)C IAXXETNIOYFMLW-COPLHBTASA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 4
- 229940119545 isobornyl methacrylate Drugs 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- 238000003776 cleavage reaction Methods 0.000 claims description 3
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 3
- 230000007017 scission Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 36
- 239000000853 adhesive Substances 0.000 description 35
- 230000001070 adhesive effect Effects 0.000 description 35
- 229920006223 adhesive resin Polymers 0.000 description 35
- 239000004840 adhesive resin Substances 0.000 description 21
- 229920000139 polyethylene terephthalate Polymers 0.000 description 21
- 239000005020 polyethylene terephthalate Substances 0.000 description 21
- 239000004821 Contact adhesive Substances 0.000 description 14
- 239000011342 resin composition Substances 0.000 description 14
- 239000004417 polycarbonate Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 7
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 7
- NQSLZEHVGKWKAY-UHFFFAOYSA-N 6-methylheptyl 2-methylprop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C(C)=C NQSLZEHVGKWKAY-UHFFFAOYSA-N 0.000 description 7
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 7
- FIHBHSQYSYVZQE-UHFFFAOYSA-N 6-prop-2-enoyloxyhexyl prop-2-enoate Chemical compound C=CC(=O)OCCCCCCOC(=O)C=C FIHBHSQYSYVZQE-UHFFFAOYSA-N 0.000 description 7
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- -1 polyethylene terephthalate Polymers 0.000 description 7
- 238000006116 polymerization reaction Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses an adhesive film for an image display device and an image display device, which are applicable to plastic materials, wherein the adhesive film meets the following conditions: 1) The storage modulus at 120 ℃ and 0.1Hz is more than 45000Pa; 2) The loss modulus at 120℃and 0.1Hz is greater than 2500Pa. The adhesive film has good bonding effect and does not generate warping and degumming phenomena.
Description
Technical Field
The invention relates to the technical field of optical display, in particular to an adhesive film for an image display device and an image display device, which are applicable to plastic materials.
Background
OCA (Optically Clear Adhesive) is a special adhesive for bonding transparent optical elements (such as touch screens, displays, optical lenses, etc.). OCA optical cement is generally used in the display field to connect a cover plate with a display module (LCD and OLED), and the cover plate is generally made of two materials: glass and plastic. The plastic cover plate is mainly composed of PC (polycarbonate), PMMA (polymethyl methacrylate) and MS (copolymer of methyl methacrylate and styrene), and has the irreplaceable function in certain occasions because of low cost and explosion-proof performance.
However, when the plastic cover plate is subjected to reliability tests such as high temperature, small molecule gas is easily released, and the common OCA is easy to generate bad bubbles.
CN115895494a discloses an OCA for plastic cover plates, which uses a large amount of high Tg monomers such as N-vinyl pyrrolidone to improve reliability, but does not completely eliminate the problem of bubbles.
CN105793305a discloses an OCA for plastic cover plates comprising 5 to about 25 parts by mass of a macromer having a glass transition temperature (Tg) of about 50 ℃ or higher. The OCA has better reliability, but the synthesis of a macromolecular monomer is more complex, the cost is higher, and the application of the OCA is limited.
CN115895494a discloses an OCA for plastic cover plates, which consists of a polymer containing a high Tg oligomer and an acrylic derivative, and has better reliability, can effectively inhibit bubbles, but has poor adhesive force and risk of edge lifting and degumming.
Under the background, in combination with the specific requirements of the industry, there is an urgent need to develop an adhesive film for plastic cover plates with good reliability.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an adhesive film for an image display device, which is applicable to plastic materials and has good reliability.
In order to achieve the above purpose, the invention adopts the following technical scheme: an adhesive film for an image display device, which is suitable for a plastic material, and satisfies the following conditions: 1) The storage modulus at 120 ℃ and 0.1Hz is more than 45000Pa; 2) The loss modulus at 120℃and 0.1Hz is greater than 2500Pa.
As a specific embodiment, the adhesive film comprises the following components:
(1) an acrylic derivative polymer comprising the following raw materials: a C4-C18 acrylate monomer, a hydrophilic monomer, and an alkaline monomer;
(2) and the photoinitiator is hydrogen abstraction type photoinitiator or cleavage type photoinitiator.
(3) High Tg oligomers.
As a specific practical way, the preparation process of the high Tg oligomer is as follows:
adding 5.0g of isobornyl methacrylate, 4.75g of acryloylmorpholine, 0.25g of acrylamide, 0.02g of benzil dimethyl ether and 0.015g of n-dodecyl mercaptan into a reaction vessel, stirring and uniformly mixing, simultaneously carrying out nitrogen substitution at the air volume of 100 mL/min, and then carrying out nitrogen substitution at the air volume of 1.0mW/cm 2 And (3) polymerizing for 10min under a 365nm LED lamp to obtain the required oligomer.
Another object of the present invention is to provide an image display device having a layer on the visible side thereof adhered by the adhesive film for an image display device, which is suitably made of a plastic material as described above.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention is suitable for the adhesive film for the image display device of the plastic material, the raw materials of the adhesive film adopt acrylic acid derivative polymers and high Tg oligomers, and the storage modulus of the adhesive film is more than 45000Pa at 120 ℃ and 0.1 Hz; the loss modulus at 120 ℃ and 0.1Hz is more than 2500Pa, so that the adhesive sheet used on the plastic cover plate has good adhesion and reliability, does not warp and has no bubbles.
Detailed Description
The technical scheme of the invention is further described below in conjunction with specific embodiments.
The invention provides an adhesive film for an image display device, which is applicable to plastic materials, and the adhesive film meets the following conditions: 1) The storage modulus at 120 ℃ and 0.1Hz is more than 45000Pa; 2) The loss modulus at 120℃and 0.1Hz is greater than 2500Pa. The adhesive film comprises the following components:
(1) an acrylic derivative polymer comprising the following raw materials: a C4-C18 acrylate monomer, a hydrophilic monomer, and an alkaline monomer;
(2) and the photoinitiator is hydrogen abstraction type photoinitiator or cleavage type photoinitiator.
(3) High Tg oligomers.
1. Preparation of high Tg oligomers
Into a reaction vessel, 5.0g of isobornyl methacrylate (IBOMA), 4.75g of Acryloylmorpholine (ACMO), 0.25g of Acrylamide (AM), 0.02g of benzil dimethyl ether (BDK) and 0.015g of n-dodecyl mercaptan (NDM) were charged and stirred and mixed uniformly while nitrogen substitution was carried out at an air volume of 100 mL/min. Then, the mixture was polymerized under a 365nm LED lamp of 1.0mW/cm2 for 10 minutes to obtain an oligomer HO having a weight average molecular weight of 16600g/mol.
2. Preparation of adhesive film
Example 1
63.0g of isooctyl acrylate, 10.0g of isobornyl acrylate, 10.0g of hydroxyethyl acrylate, 9.0g of isooctyl methacrylate, 5.0g of acryloylmorpholine, 3.0g of acrylamide and 0.05g of benzil dimethyl ether are added into a reaction vessel with a thermometer, a stirring device and a nitrogen injection tube, and the mixture is stirred and uniformly mixed, and nitrogen substitution is carried out at an air volume of 100 mL/min. After that, polymerization was carried out under a 365nm LED lamp of 1.0mW/cm2 to raise the solid content to 15%. Then, 0.10g of hexanediol diacrylate (HDDA), 0.4g of benzildimethyl ether and 1.0g of oligomer HO were added thereto, and after stirring and dissolving uniformly, the mixture was defoamed under a vacuum of 0.95MPa for 2 hours to obtain an adhesive resin composition for an adhesive sheet.
Then, the adhesive resin composition for an adhesive sheet obtained in the above (release surface contact adhesive resin composition) was dropped onto a polyethylene terephthalate (PET) release film, and then another PET release film was covered thereon (release surface contact adhesive resin composition), the adhesive resin composition for an adhesive sheet was coated into a sheet shape by a roll, and ultraviolet rays were irradiated with an ultraviolet irradiation device (intensity was 0.1mW/cm 2 Energy of 600mJ/cm 2 ) A transparent adhesive sheet was obtained.
Example 2
63.0g of isooctyl acrylate, 10.0g of isobornyl acrylate, 10.0g of hydroxyethyl acrylate, 9.0g of isooctyl methacrylate, 5.0g of acryloylmorpholine, 3.0g of acrylamide and 0.05g of benzil dimethyl ether are added into a reaction vessel with a thermometer, a stirring device and a nitrogen injection tube, and the mixture is stirred and uniformly mixed, and nitrogen substitution is carried out at an air volume of 100 mL/min. After that, polymerization was carried out under a 365nm LED lamp of 1.0mW/cm2 to raise the solid content to 15%. Then, 0.15g of hexanediol diacrylate (HDDA), 0.4g of benzildimethyl ether and 1.0g of oligomer HO were added thereto, and after stirring and dissolving uniformly, the mixture was defoamed under a vacuum of 0.95MPa for 2 hours to obtain an adhesive resin composition for an adhesive sheet.
Then, the adhesive resin composition for an adhesive sheet obtained in the above (release surface contact adhesive resin composition) was dropped onto a polyethylene terephthalate (PET) release film, and then another PET release film was covered thereon (release surface contact adhesive resin composition), the adhesive resin composition for an adhesive sheet was coated into a sheet shape by a roll, and ultraviolet rays were irradiated with an ultraviolet irradiation device (intensity was 0.1mW/cm 2 Energy of 600mJ/cm 2 ) A transparent adhesive sheet was obtained.
Example 3
63.0g of isooctyl acrylate, 10.0g of isobornyl acrylate, 10.0g of hydroxyethyl acrylate, 9.0g of isooctyl methacrylate, 5.0g of acryloylmorpholine, 3.0g of acrylamide and 0.05g of benzil dimethyl ether are added into a reaction vessel with a thermometer, a stirring device and a nitrogen injection tube, and the mixture is stirred and uniformly mixed, and nitrogen substitution is carried out at an air volume of 100 mL/min. After that, polymerization was carried out under a 365nm LED lamp of 1.0mW/cm2 to raise the solid content to 15%. Then, 0.20g of hexanediol diacrylate (HDDA), 0.4g of benzildimethyl ether and 1.0g of oligomer HO were added thereto, and after stirring and dissolving uniformly, the mixture was defoamed under a vacuum of 0.95MPa for 2 hours to obtain an adhesive resin composition for an adhesive sheet.
Then, the adhesive resin composition for an adhesive sheet obtained in the above (release surface contact adhesive resin composition) was dropped onto a polyethylene terephthalate (PET) release film, and then another PET release film was covered thereon (release surface contact adhesive resin composition), the adhesive resin composition for an adhesive sheet was coated into a sheet shape by a roll, and ultraviolet rays were irradiated with an ultraviolet irradiation device (intensity was 0.1mW/cm 2 Energy of 600mJ/cm 2 ) ObtainingA transparent adhesive sheet was obtained.
Comparative example 1
63.0g of isooctyl acrylate, 10.0g of isobornyl acrylate, 10.0g of hydroxyethyl acrylate, 9.0g of isooctyl methacrylate, 5.0g of acryloylmorpholine, 3.0g of acrylamide and 0.05g of benzil dimethyl ether are added into a reaction vessel with a thermometer, a stirring device and a nitrogen injection tube, and the mixture is stirred and uniformly mixed, and nitrogen substitution is carried out at an air volume of 100 mL/min. After that, polymerization was carried out under a 365nm LED lamp of 1.0mW/cm2 to raise the solid content to 15%. Then, 0.20g of hexanediol diacrylate (HDDA), 0.4g of benzildimethyl ether and 1.0g of oligomer HO were added thereto, and after stirring and dissolving uniformly, the mixture was defoamed under a vacuum of 0.95MPa for 2 hours to obtain an adhesive resin composition for an adhesive sheet.
Then, the adhesive resin composition for an adhesive sheet obtained in the above (release surface contact adhesive resin composition) was dropped onto a polyethylene terephthalate (PET) release film, and then another PET release film was covered thereon (release surface contact adhesive resin composition), the adhesive resin composition for an adhesive sheet was coated into a sheet shape by a roll, and ultraviolet rays were irradiated with an ultraviolet irradiation device (intensity: 1mW/cm 2 Energy of 600mJ/cm 2 ) A transparent adhesive sheet was obtained.
Comparative example 2
63.0g of isooctyl acrylate, 10.0g of isobornyl acrylate, 10.0g of hydroxyethyl acrylate, 9.0g of isooctyl methacrylate, 5.0g of acryloylmorpholine, 3.0g of acrylamide and 0.05g of benzil dimethyl ether are added into a reaction vessel with a thermometer, a stirring device and a nitrogen injection tube, and the mixture is stirred and uniformly mixed, and nitrogen substitution is carried out at an air volume of 100 mL/min. Thereafter, polymerization was carried out under a 365nm LED lamp of 1mW/cm2 to raise the solid content to 15%. Then, 0.20g of hexanediol diacrylate (HDDA) and 0.4g of benzil dimethyl ether were added thereto, and after stirring and dissolving uniformly, the mixture was defoamed under a vacuum of 0.95MPa for 2 hours to obtain an adhesive resin composition for an adhesive sheet.
Then, the adhesive resin composition for an adhesive sheet obtained in the above was dropped onto a polyethylene terephthalate (PET) release filmRelease surface contact adhesive resin composition), then another PET release film was coated thereon (release surface contact adhesive resin composition), the adhesive sheet was coated with the adhesive resin composition into a sheet shape by a roll, and ultraviolet rays were irradiated with an ultraviolet irradiation device (intensity was 0.1mW/cm 2 Energy of 600mJ/cm 2 ) A transparent adhesive sheet was obtained.
Comparative example 3
63.0g of isooctyl acrylate, 10.0g of isobornyl acrylate, 10.0g of hydroxyethyl acrylate, 9.0g of isooctyl methacrylate, 5.0g of acryloylmorpholine, 3.0g of acrylamide and 0.05g of benzil dimethyl ether are added into a reaction vessel with a thermometer, a stirring device and a nitrogen injection tube, and the mixture is stirred and uniformly mixed, and nitrogen substitution is carried out at an air volume of 100 mL/min. Thereafter, polymerization was carried out under a 365nm LED lamp of 1mW/cm2 to raise the solid content to 15%. Then, 0.20g of hexanediol diacrylate (HDDA) and 0.4g of benzil dimethyl ether were added thereto, and after stirring and dissolving uniformly, the mixture was defoamed under a vacuum of 0.95MPa for 2 hours to obtain an adhesive resin composition for an adhesive sheet.
Then, the adhesive resin composition for an adhesive sheet obtained in the above (release surface contact adhesive resin composition) was dropped onto a polyethylene terephthalate (PET) release film, and then another PET release film was covered thereon (release surface contact adhesive resin composition), the adhesive resin composition for an adhesive sheet was coated into a sheet shape by a roll, and ultraviolet rays were irradiated with an ultraviolet irradiation device (intensity: 1mW/cm 2 Energy of 600mJ/cm 2 ) A transparent adhesive sheet was obtained.
Comparative example 4
63.0g of isooctyl acrylate, 10.0g of isobornyl acrylate, 10.0g of hydroxyethyl acrylate, 9.0g of isooctyl methacrylate, 5.0g of acryloylmorpholine, 3.0g of acrylamide and 0.05g of benzil dimethyl ether are added into a reaction vessel with a thermometer, a stirring device and a nitrogen injection tube, and the mixture is stirred and uniformly mixed, and nitrogen substitution is carried out at an air volume of 100 mL/min. Thereafter, polymerization was carried out under a 365nm LED lamp of 1mW/cm2 to raise the solid content to 15%. Then, 0.60g of hexanediol diacrylate (HDDA) and 0.4g of benzil dimethyl ether were added thereto, and after stirring and dissolving uniformly, the mixture was defoamed under a vacuum of 0.95MPa for 2 hours to obtain an adhesive resin composition for an adhesive sheet.
Then, the adhesive resin composition for an adhesive sheet obtained in the above (release surface contact adhesive resin composition) was dropped onto a polyethylene terephthalate (PET) release film, and then another PET release film was covered thereon (release surface contact adhesive resin composition), the adhesive resin composition for an adhesive sheet was coated into a sheet shape by a roll, and ultraviolet rays were irradiated with an ultraviolet irradiation device (intensity: 1mW/cm 2 Energy of 600mJ/cm 2 ) A transparent adhesive sheet was obtained.
< test >
The adhesive sheets obtained in the above examples and comparative examples were evaluated according to the following evaluation methods, and the evaluation results are shown in table 1.
Measurement of modulus at 120 ℃ and 0.1Hz
An adhesive sheet having a thickness of 0.5mm, a width of 10mm and a length of 10mm was prepared, and the storage modulus G 'and the loss modulus G' were measured at 120℃and a frequency of 0.1Hz using a wide-range dynamic viscoelasticity measuring apparatus (Solids Analyzer RSA-II, manufactured by Pheometric Scientific Co.).
(II) lamination
Two structures are adopted for bonding, one is the structure of the PC light guide plate-OCA-PC light guide plate, and the other is the structure of the PC light guide plate-OCA-glass.
The light film was peeled off, the produced adhesive sheet (adhesive film thickness 150 μm) was attached to a PC light guide plate with a load of 2kg by a rubber roll (roll diameter: 50mm, roll width: 210 mm), the heavy film was peeled off, and the PC light guide plate with OCA was attached to the other surface (PC light guide plate or glass) with a load of 2kg by a rubber roll (roll diameter: 50mm, roll width: 210 mm), and then defoamed at 40℃for 15 minutes under a condition of 0.5 MPa.
(III) reliability evaluation
Placing the attaching part in an oven at 85 ℃ for standing for 3 hours, taking out, scoring 1 to 5 points on the size and quantity of bubbles in the surface through the size of the bubbles in the visible area, and scoring by edge warping according to OK and NG:
5, the method comprises the following steps: no air bubble;
4, the following steps: 5 or less small bubbles (diameter of 0.5mm or less);
3, the method comprises the following steps: 5-10 small bubbles;
2, the method comprises the following steps: more than 10 small bubbles or 1-5 large bubbles (more than 0.5mm in diameter);
1, the method comprises the following steps: and (5) filling the screen with bubbles.
TABLE 1
From table 1 we can derive:
1) Examples 1 to 3, which all have a storage modulus at 120℃of greater than 45000Pa at 0.1Hz, while satisfying a storage modulus at 120℃of greater than 45000Pa at 0.1 Hz; the loss modulus is more than 2500Pa at 120 ℃ and 0.1Hz, so that no bubbles are generated when the PC light guide plate is attached between two PC light guide plates or between the PC light guide plate and the glass plate, and the warping performance is good;
2) Compared with the adhesive film of the example 3, the adhesive film of the comparative example 1 has different ultraviolet light intensity during UV irradiation in the preparation process, so that the adhesive film of the comparative example 1 has low storage modulus at 120 ℃ and 0.1Hz, and bubbles exist after the PG is attached;
3) In comparative examples 2 to 4, the adhesive film obtained without adding the high Tg oligomer could not simultaneously satisfy a storage modulus of more than 45000Pa at 120℃at 0.1Hz, and a storage modulus of more than 45000Pa at 120℃at 0.1 Hz; two conditions, namely a loss modulus of more than 2500Pa at 120℃and 0.1Hz, lead to the formation of bubbles and even warpage after the product is attached, as in comparative example 4.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (4)
1. An adhesive film for an image display device, which is suitable for plastic materials, characterized in that the adhesive film satisfies the following conditions: 1) The storage modulus at 120 ℃ and 0.1Hz is more than 45000Pa; 2) The loss modulus at 120℃and 0.1Hz is greater than 2500Pa.
2. The adhesive film for an image display device according to claim 1, wherein the adhesive film comprises the following components:
(1) an acrylic derivative polymer comprising the following raw materials: a C4-C18 acrylate monomer, a hydrophilic monomer, and an alkaline monomer;
(2) a photoinitiator, wherein the photoinitiator is hydrogen abstraction type photoinitiator or cleavage type photoinitiator;
(3) high Tg oligomers.
3. An adhesive film for image display device according to claim 2, wherein the preparation process of the high Tg oligomer is as follows:
adding 5.0g isobornyl methacrylate, 4.75g acryloylmorpholine, 0.25g acrylamide, 0.02g benzil dimethyl ether and 0.015g n-dodecyl mercaptan into a reaction vessel, stirring and mixing uniformly, simultaneously carrying out nitrogen substitution with 100 mL/min air quantity, and then carrying out nitrogen substitution at 1.0mW/cm 2 And (3) polymerizing for 10min under a 365nm LED lamp to obtain the required oligomer.
4. An image display device having a layer on the visible side to which the adhesive film for an image display device made of a plastic material as claimed in claim 1 is adhered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311674597.3A CN117625073A (en) | 2023-12-08 | 2023-12-08 | Adhesive film suitable for plastic image display device and image display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311674597.3A CN117625073A (en) | 2023-12-08 | 2023-12-08 | Adhesive film suitable for plastic image display device and image display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117625073A true CN117625073A (en) | 2024-03-01 |
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ID=90030345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311674597.3A Pending CN117625073A (en) | 2023-12-08 | 2023-12-08 | Adhesive film suitable for plastic image display device and image display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117625073A (en) |
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2023
- 2023-12-08 CN CN202311674597.3A patent/CN117625073A/en active Pending
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