CN217535890U - Integrated adhesive tape used in flexible AMOLED display screen - Google Patents

Abstract

The utility model discloses an integral type sticky tape for in flexible AMOLED display screen, including the PI stratum basale, PI stratum basale one side is provided with first glue film layer, first glue film layer is kept away from PI stratum basale one side and is provided with the conducting layer, the conducting layer is kept away from first glue film layer one side and is provided with the second glue film layer, second glue film layer is kept away from conducting layer one side and is provided with the foam layer, foam layer is kept away from second glue film layer one side and is provided with the third glue film layer, the third glue film layer is kept away from foam layer one side and is provided with the metal level, above-mentioned sticky tape structure has higher viscidity under normal atmospheric temperature, is difficult for the cull; good buffer performance and excellent shielding conductivity; meanwhile, the performance of the product after aging is not affected, so that the performance of the product is ensured.

Description

Integrated adhesive tape used in flexible AMOLED display screen

Technical Field

The utility model relates to a sticky tape field, in particular to an integral type sticky tape for in flexible AMOLED display screen.

Background

Along with the mass production popularization of flexible AMOLED display screens and the update of products on the market, the light and thin product is in demand, the structure adopted under the original screen is complex, the thickness is thick, generally, the flexible AMOLED display screens are copper foils, acrylic glue films and PI or insulation films, acrylic glue films, acrylic foam, acrylic glue films, black PET, acrylic glue films and release layers, the product structure is complex and needs multiple procedures for composite forming, the light and thin trend cannot be met, the bottom layer and the screen body are not conductive in adhesion, the product ESD derivation performance is poor due to the fact that the PI substrate of the screen body is made of insulation materials, the problems of local bright spots and dark shadows after the screen body is lightened are easily caused, and therefore, a light and thin integrated adhesive tape needs to be developed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a simple structure, product thickness has an integral type sticky tape that is used for in the flexible AMOLED display screen that obviously descends.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an integral type sticky tape for in flexible AMOLED display screen, includes the PI stratum basale, PI stratum basale one side is provided with first glued membrane layer, first glued membrane layer is kept away from PI stratum basale one side and is provided with the conducting layer, the conducting layer is kept away from first glued membrane layer one side and is provided with the second glued membrane layer, the conducting layer is kept away from to the second glued membrane layer one side and is provided with the cotton layer of bubble, the cotton layer of bubble is kept away from second glued membrane layer one side and is provided with the third glued membrane layer, the third glued membrane layer is kept away from bubble cotton layer one side and is provided with the metal level.

Further, the method comprises the following steps: the first adhesive film layer, the second adhesive film layer and the third adhesive film layer are acrylic acid modified adhesive films.

Further, the method comprises the following steps: the foam layer is acrylic foam.

Further, the method comprises the following steps: the metal layer is a copper foil.

Further, the method comprises the following steps: the copper foil is rolled copper, electrolytic copper, high-strength copper or alloy copper.

Further, the method comprises the following steps: the conducting layer comprises a conducting fiber layer and an electroplated metal layer arranged on the surface of the conducting fiber layer.

Further, the method comprises the following steps: the electroplated metal layer is an electroplated copper layer, an electroplated nickel layer, an electroplated gold layer or an electroplated silver layer.

The utility model has the advantages that: 1. the adhesive has higher viscosity at normal temperature, and is not easy to remain adhesive; good cushioning properties and excellent shielding conductivity; 2. the performance of the product after aging is not affected, and the performance of the product is ensured.

Drawings

Fig. 1 is a schematic structural diagram of an integrated adhesive tape used in a flexible AMOLED display screen according to an embodiment of the present application.

Labeled as: 1. a PI substrate layer; 2. a first adhesive film layer; 3. a conductive layer; 4. a second adhesive film layer; 5. soaking a cotton layer; 6. A third adhesive film layer; 7. a metal layer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the embodiment of the application discloses an integral type sticky tape for in flexible AMOLED display screen, including PI stratum basale 1, PI stratum basale 1 one side is provided with first glue film layer 2, PI stratum basale 1 one side is kept away from to first glue film layer 2 is provided with conducting layer 3, conducting layer 3 is kept away from first glue film layer 2 one side and is provided with second glue film layer 4, second glue film layer 4 is kept away from conducting layer 3 one side and is provided with bubble cotton layer 5, bubble cotton layer 5 is kept away from second glue film layer 4 one side and is provided with third glue film layer 6, third glue film layer 6 is kept away from bubble cotton layer 5 one side and is provided with metal level 7.

Specifically, the metal layer 7 is a copper foil, and the copper foil is rolled copper, electrolytic copper, high-strength copper or alloy copper.

Specifically, during manufacturing, the metal layer 7 is used as a base material, the metal layer is compounded with the foam cotton layer 5 after being coated with a glue film on a single surface, the metal layer is compounded with the conducting layer 3 after being coated with a glue film on the other surface of the foam cotton layer 5, the conducting layer 3 is coated with a glue film and then is attached to the PI substrate and applied to the flexible AMOLED screen, and in the structure, the PI substrate replaces traditional glass to serve as the screen substrate, so that the product is softer, and the plasticity is stronger.

In the above structure, PI is a polyimide film, which has outstanding high-temperature resistance, radiation resistance, chemical resistance, electrical insulation properties, and tensile strength, and thus is suitable for use as a substrate.

The adhesive tape structure has higher viscosity at normal temperature and is not easy to have adhesive residue; good buffer performance and excellent shielding conductivity; meanwhile, the performance of the product after aging is not affected, so that the performance of the product is ensured.

Specifically, the foam layer 5 is acrylic foam.

Specifically, the first adhesive film layer 2, the second adhesive film layer 4 and the third adhesive film layer 6 are acrylic acid modified adhesive films, the conductive layer 3 comprises a conductive fiber layer and an electroplated metal layer 7 arranged on the surface of the conductive fiber layer, and the electroplated metal layer 7 is an electroplated copper layer, an electroplated nickel layer, an electroplated gold layer or an electroplated silver layer.

The acrylic acid modified glue film is an existing material, has a good attaching effect with acrylic acid foam, has the characteristics of no glue residue after being torn off under the high-temperature condition of a product and high viscosity, is compounded with conductive cloth to form a path to conduct product ESD after being coated on the conductive layer 3, and has good shielding and grounding application.

Specifically, the conductive layer 3 comprises a conductive fiber layer and a plated metal layer 7 arranged on the surface of the conductive fiber layer.

Specifically, the electroplated metal layer 7 is an electroplated copper layer, an electroplated nickel layer, an electroplated gold layer or an electroplated silver layer.

By performing a test experiment on the product, the following experiment results are obtained:

1. the adhesive tape has good shading effect, and the optical density OD is more than 6.0.

2. The adhesive tape has smooth appearance, no concave-convex points on the surface and high smoothness of the appearance of a finished product.

3. The peeling force of the adhesive tape to an SUS304 plate is more than 2000g/inch at normal temperature, and the viscosity is more than 1500g/inch immediately after 30min at the high temperature of 85 ℃.

4. The adhesive tape has a holding force of 1KG weight of more than 72H on an SUS304 plate at normal temperature, and a holding force of 1000g weight of more than 24H on the SUS plate at a high temperature of 85 ℃.

5. The shielding effectiveness of the adhesive tape is more than or equal to 100dB (the coaxial method is adopted, the A end/B end of a signal is detected, the signal is input from the A end to the magnetic field intensity E1 of the B end when no shielding material is used, the magnetic field intensity E2 of the B end is detected after the shielding material is put in, the smaller the E2, the better the E2, the shielding effectiveness is calculated to be a negative value through a formula, but the absolute value is habitually taken, so the shielding effectiveness is a positive value).

6. The back-adhesive resistance of the conductive cloth of the adhesive tape is 25.4 x 25.4mm and less than 0.1 omega.

7. The CG side of the screen is placed on a steel plate with the thickness of 14mm downwards, a steel ball with the weight of 11.2g and the diameter of 14mm is used for impacting a copper foil surface, and the appearance of the screen and the lighting effect of built-in components are not influenced.

8. The tape was good in appearance and free of bubbles after aging at 85 ℃/85% RH/240H.

9. The adhesive tape has no layering, no bulge and no cracking among laminated structures after being aged at 85 ℃/85% by RH/240H.

10. The adhesive tape is simple to process and strong in operability.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An integral type sticky tape for in flexible AMOLED display screen which characterized in that: including PI stratum basale (1), PI stratum basale (1) one side is provided with first glued membrane layer (2), PI stratum basale (1) one side is kept away from in first glued membrane layer (2) is provided with conducting layer (3), conducting layer (3) are kept away from first glued membrane layer (2) one side and are provided with second glued membrane layer (4), conducting layer (3) one side is kept away from in second glued membrane layer (4) is provided with bubble cotton layer (5), bubble cotton layer (5) are kept away from second glued membrane layer (4) one side and are provided with third glued membrane layer (6), third glued membrane layer (6) are kept away from bubble cotton layer (5) one side and are provided with metal level (7).

2. The unitary tape for use in a flexible AMOLED display screen of claim 1, wherein: the first adhesive film layer (2), the second adhesive film layer (4) and the third adhesive film layer (6) are acrylic acid modified adhesive films.

3. The unitary tape for use in a flexible AMOLED display screen of claim 1, wherein: the foam layer (5) is acrylic foam.

4. The unitary tape for use in a flexible AMOLED display screen of claim 1, wherein: the metal layer (7) is a copper foil.

5. A unitary tape for use in a flexible AMOLED display screen as recited in claim 4, wherein: the copper foil is rolled copper, electrolytic copper, high-strength copper or alloy copper.

6. The unitary tape for use in a flexible AMOLED display screen of claim 1, wherein: the conductive layer (3) comprises a conductive fiber layer and an electroplated metal layer (7) arranged on the surface of the conductive fiber layer.

7. A unitary tape for use in a flexible AMOLED display screen as recited in claim 6, wherein: the electroplated metal layer (7) is an electroplated copper layer, an electroplated nickel layer, an electroplated gold layer or an electroplated silver layer.

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