CN104004461A - ABA structure bonding piece and preparation method thereof - Google Patents
ABA structure bonding piece and preparation method thereof Download PDFInfo
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- CN104004461A CN104004461A CN201410260557.9A CN201410260557A CN104004461A CN 104004461 A CN104004461 A CN 104004461A CN 201410260557 A CN201410260557 A CN 201410260557A CN 104004461 A CN104004461 A CN 104004461A
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Abstract
The invention discloses an ABA structure bonding piece and a preparation method of the ABA structure bonding piece. The ABA structure bonding piece is provided with an ABA structure bonding resin layer, a light release polyester resin layer arranged on the top of the ABA structure bonding resin layer, and a heavy release polyester resin layer arranged at the bottom of the ABA structure bonding resin layer. The ABA structure bonding resin layer is formed by an upper bonding resin layer A, a lower bonding resin layer A and a middle bonding resin layer B in a coextrusion mode. The preparation method comprises the steps that first, the upper bonding resin layer A, the lower bonding resin layer A and the middle bonding resin layer B are processed through three-layer slot coextrusion to form the ABA structure bonding resin layer; second, the top of the heavy release polyester resin layer is coated with the ABA structure bonding resin layer in a synchronous squeezing mode, and after processing of baking or ultraviolet radiation curing, the light release polyester resin layer is arranged on the top of the ABA structure bonding resin layer in a compound mode, and the ABA structure bonding piece is obtained. The obtained ABA structure bonding piece overcomes the defect that an existing bonding piece is coated multiple times and compounded multiple times, the coating production efficiency of the ABA structure bonding piece is greatly improved, and the product yield of the ABA structure bonding pieces is greatly increased.
Description
Technical field
The present invention relates to a kind of adhesive sheet, particularly a kind of ABA structure bond sheet and preparation method thereof.
Background technology
Along with the fast development of electronical display industry, various optics shows that product has been widely used in sphere of life.Adhesive sheet shows the laminating of product or fixing critical material as a kind of for optics, has been widely used in the touch screen display panel multilayer body of different structure.Conventionally touch screen display panel multilayer body adopts the ink silk screen printing of different colours around frame more, or forms other required pattern, and the thickness of this ink is slightly different according to each product design, and thickness is all more than 8um conventionally.Therefore, when this touch screen display panel multilayer body and other display unit intermediate demand one deck adhesive sheet when integrated of fitting, and adhesive sheet is cannot fill the difference of altitude of printing-ink time, after laminating, ink edge can produce bubble, makes the poor absorption of adhesive sheet generation sticking touch control screen display panel ink frame height section fill the problem of residual bubble.
Fill the problem of residual bubble in order to solve the poor absorption of sticking touch control screen display panel ink frame height section of adhesive sheet, conventionally adopt the adhesive sheet of flexibility, extending oil ink level is poor effectively in the time of pressing for the flexibility that it is good and mobility, but to be processing of cutting poor and be easily stained with cutter for shortcoming, and the edge of the adhesive glue modification of easily caving in affects multilayer body laminating contraposition; Contrary adhesive sheet material is really up to the mark, processing of cutting is no problem, but lack flexibility and mobility, cannot fill the difference of altitude of ink and produces edge bubble, and cohesive force is lower easily cause deaeration after laminating bounce-back cause local bubble, impact laminating adherence and conforming product rate.
Summary of the invention
Primary and foremost purpose of the present invention is intended to solve the poor absorption of sticking touch control screen display panel ink frame height section of existing adhesive sheet and fills residual bubble and application processing of cutting problem, and the ABA structure bond sheet of a kind of high laminating adherence and high production yield is provided.
Another object of the present invention is to provide the preparation method of above-mentioned ABA structure bond sheet.
A kind of ABA structure bond sheet of the present invention, has ABA structure bond resin layer, is arranged on the light release polyester resin layer and the release polyester resin layer of weight that is arranged on this ABA structure bond resin layer below of this ABA structure bond resin layer top; Wherein: described ABA structure bond resin layer is formed by the binder resin A layer of upper and lower layer and the binder resin B layer coextrusion in middle layer.
The off-type force of the light release vibrin of described light release polyester resin layer is 0 ~ 20gf/inch, is preferably 5 ~ 15gf/inch, and the off-type force of the heavy release vibrin of described heavy release polyester resin layer is 20 ~ 40gf/inch, is preferably 25 ~ 35gf/inch.
The light release vibrin of described light release polyester resin layer is selected from silicone release vibrin, the release vibrin of organic fluorine, one or more mixture without the release vibrin of silicon; The release vibrin of weight of described heavy release polyester resin layer is selected from silicone release vibrin, the release vibrin of organic fluorine, one or more mixture without the release vibrin of silicon, and the material of the ABA structure bond resin layer that can protect is according to actual needs selected.
The binder resin of the binder resin A layer of described upper and lower layer is selected from one or more mixture of solvent-borne type acrylic copolymer binder resin, no-solvent type radiation-curable propionic ester binder resin, urethane resin, polyurethane acrylic resin, epoxy resin, epoxy acrylic resin, organosilicon binder resin, rubber resin, Gum Rosin.
The glass transition temperature Tg of the binder resin of the binder resin A layer of described upper and lower layer is-30 DEG C～-70 DEG C, and impression Shao Shi E type hardness tester is 0～30, and weight-average molecular weight Mw is 80 ~ 1,000,000.
The binder resin of the binder resin B layer in described middle layer is selected from one or more mixture of solvent-borne type acrylic copolymer binder resin, no-solvent type radiation-curable propionic ester binder resin, urethane resin, polyurethane acrylic resin, epoxy resin, epoxy acrylic resin, organosilicon binder resin, rubber resin, Gum Rosin.
The glass transition temperature Tg of the binder resin of the binder resin B layer in described middle layer is--30 DEG C～30 DEG C, impression Shao Shi E type hardness tester is 30～80, and weight-average molecular weight Mw is 50 ~ 700,000.
The thickness of the binder resin A layer of described upper and lower layer is 10～100um, is preferably 25 ~ 50um; The thickness of the binder resin B layer in described middle layer is 25 ~ 250um, is preferably 125 ~ 150um.
The preparation method of above-mentioned ABA structure bond sheet, comprises the steps:
A) the binder resin B layer in the binder resin A layer of upper and lower layer and middle layer is adopted to three layers of coextrusion ABA structure bond resin layer that obtains of bar seam;
B) by the synchronous squeezing and coating of ABA structure bond resin layer that obtain in heavy release polyester resin layer top, after overbaking or cured with ultraviolet radiation, be compounded in above this ABA structure bond resin layer with light release polyester resin layer, obtain ABA structure bond sheet.
The present invention compared with prior art, has following beneficial effect:
1) ABA structure bond sheet of the present invention, utilize the upper and lower layer binder resin A layer of ABA structure bond resin layer to there is the application characteristic of flexibility and mobility, solve the problem that residual bubble and the laminating adherence to light, heavy release polyester resin layer are filled in the poor absorption of sticking touch control screen display panel ink frame height section, utilize the middle layer binder resin B layer of ABA structure bond resin layer to there is the application characteristic of strong interior poly-rigidity simultaneously, be conducive to apply processing of cutting, solved the problem that the excessive glue in edge caves in that cuts; Make the coating performance of ABA structure bond sheet reach high unity with application processing of cutting.
2) preparation method of ABA structure bond sheet of the present invention, select the binder resin with different application characteristic of the binder resin A layer of upper and lower layer and the binder resin B layer in middle layer, and adopt the seam extrusion die coextrusion of three layers of bar and form ABA structure bond resin layer synchronous squeezing and coating in light, heavy release polyester resin layer, overcome existing adhesive sheet and be repeatedly coated with repeatedly compound defect, method is simple, and has greatly improved coating production efficiency and the product qualified rate of ABA structure bond sheet.
Embodiment
embodiment 1:
It is-40 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 30, weight-average molecular weight Mw is that 1,000,000 solvent-type acrylic ester copolymer binder resin is elected as, the binder resin of the binder resin A layer of lower floor, and taking glass transition temperature Tg as-28 DEG C, impression Shao Shi E type hardness tester is 50, weight-average molecular weight Mw is the binder resin that 700,000 solvent-type acrylic ester copolymer binder resin is elected the binder resin B layer in middle layer as, adopt three layers of bar seam to coextrude and coat and extrude above-mentioned binder resin formation ABA structure bond resin layer simultaneously, by the synchronous squeezing and coating of ABA structure bond resin layer that obtain in heavy release polyester resin layer top (wherein, the release vibrin of weight of heavy release polyester resin layer is selected off-type force 28gf/inch, model is YT-1008, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), then put into baking oven, 90 DEG C of baking 10min, by the solvent evaporates in binder resin, make, the thickness of the binder resin A layer of lower floor is 25um, the thickness of the binder resin B layer in middle layer is 125um, the ABA structure bond resin layer that formation total thickness is 175um, the top that is finally compounded in this ABA structure bond resin layer with light release polyester resin layer (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), obtain ABA structure bond sheet.
embodiment 2:
It is-51 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 26, weight-average molecular weight Mw is that the no-solvent type radiation-curable propionic ester binder resin obtaining after 1,000,000 no-solvent type propionic ester prepolymer mixes by 1:200 part by weight with ultraviolet initiator is elected as, the binder resin of the binder resin A layer of lower floor, and taking glass transition temperature Tg as-30 DEG C, impression Shao Shi E type hardness tester is 60, weight-average molecular weight Mw is the binder resin that the no-solvent type radiation-curable propionic ester binder resin that obtains after 600,000 no-solvent type propionic ester prepolymer mixes by 1:100 part by weight with ultraviolet initiator is elected the binder resin B layer in middle layer as, adopt three layers of bar seam to coextrude and coat and extrude above-mentioned binder resin formation ABA structure bond resin layer simultaneously, by the synchronous squeezing and coating of ABA structure bond resin layer that obtain in heavy release polyester resin layer top (wherein, it is 28gf/inch that the release vibrin of weight of heavy release polyester resin layer is selected off-type force, model is YT-1008, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), make, the thickness of the binder resin A layer of lower floor is 50um, the thickness of the binder resin B layer in middle layer is 150um, the ABA structure bond resin layer that formation total thickness is 250um, the top that is finally compounded in this ABA structure bond resin layer with light release polyester resin layer (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), through two-sided ultraviolet 1000mj/cm
2radiation curing, obtains ABA structure bond sheet.
embodiment 3:
It is-70 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 10, weight-average molecular weight Mw is that 800,000 polyurethane acrylic resin is elected as, the binder resin of the binder resin A layer of lower floor, and taking glass transition temperature Tg as 30 DEG C, impression Shao Shi E type hardness tester is 80, weight-average molecular weight Mw is the binder resin that 500,000 solvent-type acrylic ester copolymer binder resin is elected the binder resin B layer in middle layer as, adopt three layers of bar seam to coextrude and coat and extrude above-mentioned binder resin formation ABA structure bond resin layer simultaneously, by the synchronous squeezing and coating of ABA structure bond resin layer that obtain in heavy release polyester resin layer top (wherein, it is 28gf/inch that the release vibrin of weight of heavy release polyester resin layer is selected off-type force, model is YT-1008, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), then put into baking oven, 90 DEG C of baking 10min, by the solvent evaporates in binder resin, make, the thickness of the binder resin A layer of lower floor is 50um, the thickness of the binder resin B layer in middle layer is 150um, the ABA structure bond resin layer that formation total thickness is 250um, the top that is finally compounded in this ABA structure bond resin layer with light release polyester resin layer (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), obtain ABA structure bond sheet.
comparative example 1:
It is-40 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 30, weight-average molecular weight Mw is that 1,000,000 solvent-type acrylic ester copolymer binder resin is coated on heavy release polyester resin layer top (wherein, it is 28gf/inch that the release vibrin of weight of heavy release polyester resin layer is selected off-type force, model is YT-1008, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), then put into baking oven, 90 DEG C of baking 10min, make the dry thick 175um of being of binder layer, finally use light release polyester resin layer compound (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), get final product to obtain single layer structure adhesive sheet.
comparative example 2:
It is-28 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 50, weight-average molecular weight Mw is that 700,000 solvent-type acrylic ester copolymer binder resin is coated on heavy release polyester resin layer top (wherein, it is 28gf/inch that the release vibrin of weight of heavy release polyester resin layer is selected off-type force, model is YT-1008, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), then put into baking oven, 90 DEG C of baking 10min, make the dry thick 175um of being of binder layer, finally use light release polyester resin layer compound (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), get final product to obtain single layer structure adhesive sheet.
comparative example 3:
It is-40 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 30, weight-average molecular weight Mw is that 1,000,000 solvent-type acrylic ester copolymer binder resin is coated on heavy release polyester resin layer top (wherein, it is 28gf/inch that the release vibrin of weight of heavy release polyester resin layer is selected off-type force, model is YT-1008, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), then put into baking oven, 90 DEG C of baking 10min, make the dry thick 25um of being of binder layer, finally use light release polyester resin layer compound (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), get final product to obtain single layer structure A-1 adhesive sheet, it is-40 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 30, weight-average molecular weight Mw is that 1,000,000 solvent-type acrylic ester copolymer binder resin is coated on heavy release polyester resin layer top (wherein, it is 14gf/inch that the release vibrin of weight of heavy release polyester resin layer is selected off-type force, model is YT-1007, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), then put into baking oven, 90 DEG C of baking 10min, make the dry thick 25um of being of binder layer, finally use light release polyester resin layer compound (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), get final product to obtain single layer structure A-2 adhesive sheet, it is-28 DEG C by glass transition temperature Tg, impression Shao Shi E type hardness tester is 50, weight-average molecular weight Mw is that 700,000 solvent-type acrylic ester copolymer binder resin is coated on heavy release polyester resin layer top (wherein, it is 14gf/inch that the release vibrin of weight of heavy release polyester resin layer is selected off-type force, model is YT-1007, the release vibrin of weight that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), then put into baking oven, 90 DEG C of baking 10min, make the dry thick 125um of being of binder layer, finally use light release polyester resin layer compound (wherein, it is 5gf/inch that the light release vibrin of light release polyester resin layer is selected off-type force, model is YT-4106, the light release vibrin that Guangzhou Nansha Huazhuo Chemical Co., Ltd. manufactures), get final product to obtain single layer structure B adhesive sheet, adopt repeatedly complex method, finally form the paste layer adhesive sheet of YT-1008/A-1/B/A-2/YT-1007 structure.
The performance test results of table 1 embodiment 1 ~ 3 and comparative example 1 ~ 3
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Cutting property of processing | ○ | ○ | ○ | × | ○ | ○ |
| The poor absorption of level of ink section | ○ | ○ | ○ | ○ | × | ○ |
| Laminating adherence | ○ | ○ | ○ | ○ | ○ | ○ |
| Conforming product rate | >80% | >80% | >80% | >80% | >80% | <70% |
From the embodiment 1 ~ 3 of table 1 and relatively can finding out of comparative example 1 ~ 3, the ABA structure bond sheet of embodiment 1 ~ 3 preparation utilizes the upper of ABA structure bond resin layer, lower floor's binder resin A layer has the application characteristic of flexibility and mobility, solve that residual bubble is filled in the poor absorption of sticking touch control screen display panel ink frame height section and to gently, the problem of the laminating adherence of heavy release polyester resin layer, utilize the middle layer binder resin B layer of ABA structure bond resin layer to there is the application characteristic of strong interior poly-rigidity simultaneously, be conducive to apply processing of cutting, solve the problem that the excessive glue in edge caves in that cuts, make the coating performance of ABA structure bond sheet reach high unity with application processing of cutting, and greatly improved the conforming product rate of ABA structure bond sheet.And comparative example 1 ~ 2 is existing single layer structure adhesive sheet, owing to only there being individual layer bonding resin layer, or there is processing processing of cutting problem, the situation that edge has excessive glue to ooze out; Or exist level of ink section difference to be absorbed with residual air bubble problem; Comparative example 3 is the repeatedly compound adhesive sheet obtaining of existing repeatedly coating, preparation method's complexity, and coating production efficiency is low, and conforming product rate is lower than 70%.
each testing performance index method:
cutting property of processing:adopt cross cutting punching cutter, adhesive sheet is carried out die-cut, the edge shape of the die-cut rear adhesive sheet of visual inspection.If the situation that edge has excessive glue to ooze out, is judged to be "×", the situation that the glue that do not overflow oozes out is judged to be "○".
the poor absorption of level of ink section:stiffened polyester panel print thickness is 20um frame ink, by the light release film glass of die-cut good adhesive sheet, adhesive sheet is fitted in and has the poor panel position of printing height by hand roller (mechanical compaction roll).Then the heavy release film of adhesive sheet is peeled off, under vacuum condition by other one side and the glass gluing of adhesive sheet.Finally the multilayer body of laminating is placed in to autoclave (0.5Mpa, 60 DEG C × 30min) deaeration.Then whether there is residual bubble by microscopic examination ink frame edge, if there is residual bubble, the poor absorption "×" of ink section, if there is no residual bubble, the poor absorption "○" of ink section.
laminating adherence:multilayer body is prepared in the poor absorption of reference oil ink level section, this multilayer body is placed under hot and humid (60 DEG C × 90%RH) condition and is placed 500 hours, the outward appearance of this multilayer body of visual inspection, whether see panel whether swell bubble, flakes, the situation such as peel off, if there is above any situation, adherence is judged to be "×"; There is not above phenomenon adherence and be judged to be "○".
conforming product rate:according to producing effective finished product area of 1 parent roll (1150mm*1000M) institute output and the ratio of institute's surface covered, as conforming product rate.
The present invention is described in detail with reference to specific embodiment, above embodiment, not content, the thickness to textural association thing of the present invention imposes any restrictions, every any trickle amendment, equivalent variations and modification of above embodiment being done according to technical spirit of the present invention or composition components or content, all belongs in the category of technical solution of the present invention.
Claims (9)
1. an ABA structure bond sheet, is characterized in that, has ABA structure bond resin layer, is arranged on the light release polyester resin layer and the release polyester resin layer of weight that is arranged on this ABA structure bond resin layer below of this ABA structure bond resin layer top; Wherein: described ABA structure bond resin layer is formed by the binder resin A layer of upper and lower layer and the binder resin B layer coextrusion in middle layer.
2. ABA structure bond sheet according to claim 1, is characterized in that, the off-type force of the light release vibrin of described light release polyester resin layer is 0 ~ 20gf/inch, is preferably 5 ~ 15gf/inch; The off-type force of the heavy release vibrin of described heavy release polyester resin layer is 20 ~ 40gf/inch, is preferably 25 ~ 35gf/inch.
3. ABA structure bond sheet according to claim 1, it is characterized in that, the light release vibrin of described light release polyester resin layer is selected from silicone release vibrin, the release vibrin of organic fluorine, one or more mixture without the release vibrin of silicon; The release vibrin of weight of described heavy release polyester resin layer is selected from silicone release vibrin, the release vibrin of organic fluorine, one or more mixture without the release vibrin of silicon.
4. ABA structure bond sheet according to claim 1, it is characterized in that, the binder resin of the binder resin A layer of described upper and lower layer is selected from one or more mixture of solvent type polyacrylate multipolymer binder resin, no-solvent type radiation-curable propionic ester binder resin, urethane resin, polyurethane acrylic resin, epoxy resin, epoxy acrylic resin, organosilicon binder resin, rubber resin, Gum Rosin.
5. according to the ABA structure bond sheet described in claim 1 or 4, it is characterized in that, the glass transition temperature Tg of the binder resin of the binder resin A layer of described upper and lower layer is-30 DEG C～-70 DEG C, and impression Shao Shi E type hardness tester is 0～30, and weight-average molecular weight Mw is 80 ~ 1,000,000.
6. ABA structure bond sheet according to claim 1, it is characterized in that, the binder resin of the binder resin B layer in described middle layer is selected from one or more mixture of solvent-borne type acrylic copolymer binder resin, no-solvent type radiation-curable propionic ester binder resin, urethane resin, polyurethane acrylic resin, epoxy resin, epoxy acrylic resin, organosilicon binder resin, rubber resin, Gum Rosin.
7. according to the ABA structure bond sheet described in claim 1 or 6, it is characterized in that, the glass transition temperature Tg of the binder resin of the binder resin B layer in described middle layer is--30 DEG C～30 DEG C, impression Shao Shi E type hardness tester is 30～80, and weight-average molecular weight Mw is 50 ~ 700,000.
8. ABA structure bond sheet according to claim 1, is characterized in that, the thickness of the binder resin A layer of described upper and lower layer is 10～100um, is preferably 25 ~ 50um; The thickness of the binder resin B layer in described middle layer is 25 ~ 250um, is preferably 125 ~ 150um.
9. the preparation method of the ABA structure bond sheet as described in claim 1 ~ 4 any one, comprises the steps:
A) the binder resin B layer in the binder resin A layer of upper and lower layer and middle layer is adopted to three layers of coextrusion ABA structure bond resin layer that obtains of bar seam;
B) by the synchronous squeezing and coating of ABA structure bond resin layer that obtain in heavy release polyester resin layer top, after overbaking or cured with ultraviolet radiation, be compounded in above this ABA structure bond resin layer with light release polyester resin layer, obtain ABA structure bond sheet.
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| CN104004461B (en) | 2015-07-15 |
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