CN105911773A - Frame sealing adhesive composition, display panel, preparation method and display device - Google Patents

Abstract

The invention provides a frame sealing glue composition, a display panel, a preparation method, and a display device, belonging to the field of display technology. Wherein, the preparation method of the frame sealing glue composition includes: mixing the barrier material and the frame sealing collagen solution according to a preset mass percentage to obtain a mixture; and subjecting the mixture to light-shielding defoaming treatment to obtain the frame sealing glue composition. The technical solution of the invention can improve the anti-puncture ability of the frame sealant composition, thereby improving the performance of the liquid crystal display panel.

Description

Frame sealant composition, display panel and preparation method, and display device

technical field

The invention relates to the field of display technology, in particular to a frame sealing adhesive composition, a display panel, a preparation method, and a display device.

Background technique

With the advancement of technology, liquid crystal display panels have gradually become one of the fastest-growing display devices due to their lightness and thinness. The manufacturing process of the liquid crystal display panel will directly affect the brightness, contrast, color and other properties of the final product.

Existing liquid crystal display panels are generally formed by boxing an array substrate and a color filter substrate, and using a sealant as an adhesive to bond the two together to form a complete liquid crystal display panel. Glass fiber and gold ball particles are generally added to the frame sealant to support and connect the upper and lower substrates respectively. However, in the process of mixing glass fiber and gold ball particles, it is inevitable that there will be uneven mixing, resulting in different supporting forces at different parts, resulting in peripheral gap defects, and liquid crystal molecules are easy to penetrate through the sealant, causing punctures, which in turn affects the liquid crystal display panel. display effect.

Contents of the invention

The technical problem to be solved by the present invention is to provide a frame sealant composition, a display panel, a preparation method, and a display device, which can improve the puncture resistance of the frame sealant composition, thereby improving the performance of the liquid crystal display panel.

In order to solve the above technical problems, embodiments of the present invention provide technical solutions as follows:

On the one hand, provide a kind of preparation method of sealant composition, comprise:

The barrier material and the collagen solution for sealing the frame are mixed according to a preset mass percentage to obtain a mixture;

The mixture is subjected to light-shielding defoaming treatment to obtain a frame sealing glue composition.

Further, the barrier material is high-density polyethylene/polyamide HDPE/PA composite material.

Further, the mass percentage of the HDPE/PA composite material in the sealant composition is 10%-20%.

Further, in the HDPE/PA composite material, the siloxane side chain liquid crystal elastomer accounts for 2%-40% by mass.

Further, the time for the degassing treatment in the dark is 1-5 hours.

Further, the mixture obtained by mixing the barrier material and the frame-sealing collagen solution according to a preset mass ratio includes:

Put the frame-sealing collagen solution into the container, and then add the barrier material to the frame-sealing collagen solution according to the preset mass ratio;

The container is placed in an ultrasonic chamber, and the container is vibrated under the action of ultrasound while stirring the mixture in the container.

Further, the stirring time is 0.4-0.6 hours.

An embodiment of the present invention provides a frame sealant composition, which is prepared by the above-mentioned preparation method, and the frame sealant composition includes a frame sealant and a barrier material doped in the frame sealant.

An embodiment of the present invention provides a method for manufacturing a display panel, the display panel includes a first substrate and a second substrate arranged in a box, and the method includes:

Coating the above-mentioned frame sealant composition on the frame sealant coating area of the first substrate;

boxing the second substrate and the first substrate coated with the sealant composition;

UV curing or thermal curing is carried out on the sealant composition to obtain the display panel.

Further, the display panel is a liquid crystal display panel, and the boxing of the second substrate and the first substrate coated with the sealant composition is specifically:

The second substrate dripped with liquid crystal and the first substrate coated with the sealant composition are boxed together.

An embodiment of the present invention also provides a display panel, including a first substrate and a second substrate disposed opposite to each other, and the first substrate and the second substrate are encapsulated by the above-mentioned sealant composition.

Further, the display panel is a liquid crystal display panel, and the display panel further includes:

A liquid crystal cell located between the first substrate and the second substrate.

An embodiment of the present invention also provides a display device, including the above-mentioned display panel.

Embodiments of the present invention have the following beneficial effects:

In the above solution, a barrier material is doped into the frame-sealing collagen solution to prepare a frame-sealing glue composition. The barrier material has good barrier properties, which can effectively prevent liquid crystal molecules from penetrating the frame sealant, and can also prevent pollution caused by the penetration of small molecules in the frame sealant, thereby improving the puncture resistance of the frame sealant composition, thereby improving performance of LCD panels.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a liquid crystal layer and a frame sealant in an existing liquid crystal display panel;

2 is a schematic cross-sectional view of a liquid crystal layer and a sealant in a liquid crystal display panel according to an embodiment of the present invention.

reference sign

1 Liquid crystal layer 2 Frame sealant composition 3 Gold ball particles 4 Glass fiber

5HDPE/PA (high density polyethylene/polyamide) composite material

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

Figure 1 is a schematic cross-sectional view of the liquid crystal layer and the sealant in the existing liquid crystal display panel. When making the liquid crystal display panel, the array substrate dripped with liquid crystal and the color film substrate coated with the sealant are vacuum-boxed. , the traditional sealant will inevitably appear uneven mixing during the mixing process, resulting in different supporting forces at various parts, resulting in peripheral gap defects, liquid crystal molecules can easily penetrate the sealant and cause punctures; in addition, if the sealant is cured Liquid crystal molecules that are not fully cured in time will also enter the sealant and cause puncture.

In order to solve the problem in the prior art that liquid crystal molecules easily penetrate the frame sealant and affect the display effect of the liquid crystal display panel, the embodiment of the present invention provides a frame sealant composition, a display panel and a preparation method, and a display device, which can improve the sealing effect. The anti-puncture ability of the sealant composition, thereby improving the performance of the liquid crystal display panel.

Embodiment one

This embodiment provides a method for preparing a frame sealant composition, including:

The barrier material and the collagen solution for sealing the frame are mixed according to a preset mass percentage to obtain a mixture;

The mixture is subjected to light-shielding degassing treatment to obtain a frame sealing glue composition.

In this embodiment, a barrier material is doped into the frame-sealing collagen solution to prepare a frame-sealing glue composition. The barrier material has good barrier properties, which can effectively prevent liquid crystal molecules from penetrating the frame sealant, and can also prevent pollution caused by the penetration of small molecules in the frame sealant, thereby improving the puncture resistance of the frame sealant composition, thereby improving performance of LCD panels.

Preferably, the barrier material is a high density polyethylene/polyamide (HDPE/PA) composite. Among them, HDPE is a non-polar polymer, which has good barrier properties to polar solvents such as water, but has high permeability to non-polar organic solvents and gases; and PA is a polar polymer, which has good barrier properties to water and other polar solvents. It has good barrier properties to non-polar solvents and gases, but poor barrier properties to polar solvents. The HDPE/PA composite material combines the advantages of the two. It is a high-barrier composite material with excellent performance. The viscosity of the glue composition can play the role of anchoring small molecules, effectively preventing penetration of liquid crystal molecules or small molecules in the frame sealant, thereby avoiding pollution caused by liquid crystal molecule puncture.

In addition, the HDPE/PA composite material has relatively high strength, adding the HDPE/PA composite material to the frame sealing collagen solution can also improve the support performance of the frame sealing adhesive composition.

Furthermore, since the PA in the HDPE/PA composite material has polarity, it can be evenly mixed with the polar conductive sealant to obtain a conductive sealant with improved uniformity, which can prevent the puncture of liquid crystal molecules. At the same time, peripheral defects of the display panel are reduced.

Preferably, the mass percentage of the HDPE/PA composite material in the frame sealant composition is 10% to 20%, if the mass percentage of the HDPE/PA composite material in the frame sealant composition is too large (such as greater than 20%), will affect the adhesion of the sealant composition, so that the packaging performance of the liquid crystal display panel is reduced; if the mass percentage of the HDPE/PA composite material in the sealant composition is too small (such as less than 10%) %), the puncture resistance of the frame sealant composition cannot be guaranteed.

In HDPE/PA composites, HDPE is a non-polar polymer, PA is a polar polymer, and the compatibility between non-polar HDPE and polar PA is poor. In order to improve the non-polar HDPE and polar PA in HDPE/PA composites, For the compatibility of polar PA, HDPE can be irradiated with γ-rays to make HDPE produce siloxane side chains, so that HDPE can be linked with polar groups such as hydroxyl and carboxyl groups, thereby improving its compatibility with PA. Preferably, in the HDPE/PA composite material, the mass percentage of the siloxane side chain liquid crystal elastomer is 2%-40%.

Preferably, the light-shielding degassing treatment takes 1-5 hours, which can not only ensure the adhesive force of the obtained frame sealant composition, but also ensure that the frame sealant composition has better puncture resistance.

The uniform dispersion of the barrier material in the frame sealant composition is a key point. In order to improve the uniformity of the frame sealant composition, in this embodiment, the barrier material is added to the frame sealant collagen solution, and then the method of ultrasonic stirring is adopted To obtain the mixture of barrier material and seal frame collagen solution. Specifically, the frame-sealing collagen solution can be put into a container, and then the barrier material is added to the frame-sealing collagen solution according to a preset mass ratio, the container is placed in an ultrasonic chamber, and the container is vibrated under the action of ultrasound, while the container is vibrated. Stir the mixture inside.

Preferably, the stirring time is 0.4-0.6 hours. Specifically, the stirring time can also be appropriately extended or reduced according to actual needs.

In a specific embodiment, the preparation method of the sealant composition of the present embodiment includes the following steps:

Step a: Mix the frame-sealing collagen solution and HDPE/PA composite material according to a preset mass ratio, and stir to disperse evenly while ultrasonically stirring. In the mixture, the mass percentage of the frame-sealing collagen solution is 60-99%, HDPE/PA In the composite material, the mass percentage of the siloxane side chain liquid crystal elastomer is 2%-40%;

Step b: put the mixture of the frame-sealing collagen solution and the HDPE/PA composite material into a defoamer for degassing in the dark, and the degassing time is 1-5 hours.

In this embodiment, HDPE/PA composite material is doped into the frame-sealing collagen solution to prepare a frame-sealing glue composition. HDPE/PA composite material has good barrier properties, which can effectively prevent liquid crystal molecules from penetrating the frame sealant, and can also prevent pollution caused by the penetration of small molecules in the frame sealant, thereby improving the anti-puncture ability of the frame sealant composition , thereby improving the performance of the liquid crystal display panel.

Embodiment two

This embodiment provides a frame sealant composition, which is prepared by the above-mentioned preparation method, and the frame sealant composition includes a frame sealant and a barrier material mixed in the frame sealant.

The frame sealant composition of this embodiment is doped with a barrier material. The barrier material has good barrier properties, can effectively prevent liquid crystal molecules from penetrating the frame sealant, and can also prevent small molecules in the frame sealant from penetrating. contamination, thereby improving the puncture resistance of the frame sealant composition, thereby improving the performance of the liquid crystal display panel.

Preferably, the barrier material is HDPE/PA composite material. Among them, HDPE is a non-polar polymer, which has good barrier properties to polar solvents such as water, but has high permeability to non-polar organic solvents and gases; and PA is a polar polymer, which has good barrier properties to water and other polar solvents. It has good barrier properties to non-polar solvents and gases, but poor barrier properties to polar solvents. The HDPE/PA composite material combines the advantages of the two. It is a high-barrier composite material with excellent performance. The viscosity of the glue composition can play the role of anchoring small molecules, effectively preventing penetration of liquid crystal molecules or small molecules in the frame sealant, thereby avoiding pollution caused by liquid crystal molecule puncture.

In addition, the HDPE/PA composite material has relatively high strength, adding the HDPE/PA composite material to the frame sealing collagen solution can also improve the support performance of the frame sealing adhesive composition.

Furthermore, since the PA in the HDPE/PA composite material has polarity, it can be evenly mixed with the polar conductive sealant to obtain a conductive sealant with improved uniformity, which can prevent the puncture of liquid crystal molecules. At the same time, peripheral defects of the display panel are reduced.

Preferably, the mass percentage of the HDPE/PA composite material in the frame sealant composition is 10% to 20%, if the mass percentage of the HDPE/PA composite material in the frame sealant composition is too large (such as greater than 20%), will affect the adhesion of the sealant composition, so that the packaging performance of the liquid crystal display panel is reduced; if the mass percentage of the HDPE/PA composite material in the sealant composition is too small (such as less than 10%) %), the puncture resistance of the frame sealant composition cannot be guaranteed.

Embodiment three

This embodiment provides a method for manufacturing a display panel. The display panel includes a first substrate and a second substrate arranged on a cell. The preparation method includes:

Step c: coating the above-mentioned frame sealant composition on the frame sealant coating area of the first substrate;

Specifically, the display panel may be a liquid crystal display panel, and the display panel further includes: a liquid crystal cell located between the first substrate and the second substrate.

Usually, the first substrate is a color film substrate. When coating the frame sealant composition on the color film substrate, use a light-proof operation to prevent the sealant mixture from being cured when it is irradiated by light. When forming the composition, the frame sealant composition is evenly coated on the frame sealant coating area of the color filter substrate.

Step d: boxing the second substrate and the first substrate coated with the sealant composition;

Generally, the second substrate is an array substrate on which liquid crystals are dropped, and the array substrate on which liquid crystals are dropped and the color filter substrate coated with the sealant composition are boxed together in a vacuum environment.

Step e: UV-curing or heat-curing the frame sealant composition to obtain a display panel.

The frame sealant composition of this embodiment is doped with a barrier material. The barrier material has good barrier properties, can effectively prevent liquid crystal molecules from penetrating the frame sealant, and can also prevent small molecules in the frame sealant from penetrating. contamination, thereby improving the puncture resistance of the frame sealant composition, thereby improving the performance of the liquid crystal display panel.

Embodiment Four

This embodiment provides a display panel, which includes a first substrate and a second substrate arranged in a box, and the first substrate and the second substrate are encapsulated by the above-mentioned sealant composition.

In a specific embodiment, the display panel is a liquid crystal display panel. As shown in FIG. 2 , the liquid crystal display panel includes a first substrate and a second substrate arranged opposite to each other. The first substrate and the second substrate are packaged together by the sealant composition 2, and glass fibers 4 and gold ball particles 3 are added to the sealant composition 2 to respectively support and connect the upper and lower substrates.

Further, HDPE/PA composite material 5 is also doped in the frame sealant composition 2. HDPE/PA composite material 5 is a high-barrier composite material with excellent performance and has good barrier performance. Doping HDPE/PA composite material 5 in the compound can effectively prevent liquid crystal molecules from penetrating the frame sealant, and can also prevent pollution caused by the penetration of small molecules in the frame sealant, thereby improving the anti-puncture ability of the frame sealant composition. Further, the performance of the liquid crystal display panel is improved.

Embodiment five

This embodiment provides a display device, including the above-mentioned display panel. The display device can be any product or component with display function such as LCD TV, liquid crystal display, digital photo frame, mobile phone, tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board and a backplane.

The above is the preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Claims (13)

1. the preparation method of a sealant composition, it is characterised in that including:

Barrier material and sealed plastic box stock solution are obtained mixture according to preset quality percentage ratio mixture；

Described mixture is carried out lucifuge deaeration process and obtains sealant composition.

The preparation method of sealant composition the most according to claim 1, it is characterised in that described barrier material is highly dense Degree polyethylene/polyamide HDPE/PA composite.

The preparation method of sealant composition the most according to claim 2, it is characterised in that described HDPE/PA composite wood Material mass percent shared by described sealant composition is 10%～20%.

The preparation method of sealant composition the most according to claim 2, it is characterised in that described HDPE/PA composite wood In material, the mass percent shared by siloxane chain liquid crystal elastic body is 2%-40%.

The preparation method of sealant composition the most according to claim 1, it is characterised in that the time that lucifuge deaeration processes For 1-5 hour.

The preparation method of sealant composition the most according to claim 1, it is characterised in that described by barrier material with envelope Frame collagen solution obtains mixture according to preset quality than mixture and includes:

Sealed plastic box stock solution is put in container, then barrier material is added in sealed plastic box stock solution according to preset quality ratio；

Described container is placed on ultrasonic cavity indoor, makes described container vibrate under ultrasonication, simultaneously to mixing in container Compound is stirred.

The preparation method of sealant composition the most according to claim 6, it is characterised in that the time of stirring is 0.4- 0.6 hour.

8. a sealant composition, it is characterised in that for using the preparation method system as according to any one of claim 1-7 For obtaining, described sealant composition includes sealed plastic box and the barrier material being entrained in described sealed plastic box.

9. a preparation method for display floater, described display floater includes first substrate and the second substrate arranging box, its Being characterised by, described method includes:

Sealant composition as claimed in claim 8 is coated on the sealed plastic box coating zone of first substrate；

By second substrate and be coated with the first substrate of sealant composition to box；

Sealant composition is carried out ultra-violet curing or heat cure, obtains described display floater.

The preparation method of display floater the most according to claim 9, it is characterised in that described display floater is liquid crystal Show panel, described by second substrate and be coated with the first substrate of sealant composition to box particularly as follows:

The second substrate having liquid crystal will be dripped and be coated with the first substrate of sealant composition to box.

11. 1 kinds of display floaters, including the first substrate arranging box and second substrate, it is characterised in that described first substrate Encapsulated by sealant composition as claimed in claim 8 with described second substrate.

12. display floaters according to claim 11, it is characterised in that described display floater is display panels, institute State display floater also to include:

Liquid crystal cell between described first substrate and described second substrate.

13. 1 kinds of display devices, it is characterised in that include the display floater as described in claim 11 or 12.