CN110628338B - Adhesive film structure - Google Patents

Abstract

The invention provides an Adhesive film structure, which solves the problems that the OCA (optical Clear Adhesive) is warped due to the phenomena of collision and the like in the transportation process, the warping generates deformation after extending to an Adhesive area, and the Adhesive area generates bubbles and the like due to the weak packaging structure of the existing OCA. The method comprises the following steps: a first protective layer; a second protective layer disposed at one side of the first protective layer; the adhesive layer is arranged between the first protective layer and the second protective layer, the area of the adhesive layer is smaller than that of the first protective layer, the area of the adhesive layer is smaller than that of the second protective layer, and the peripheries of the first protective layer and the second protective layer are in contact; and a part of the first protective layer, which is in contact with the second protective layer, is provided with a through hole, wherein the through hole penetrates through the first protective layer and the second protective layer.

Description

Adhesive film structure

Technical Field

The invention relates to the technical field of laminating, in particular to an adhesive film structure.

Background

With the development of science and technology, flexible display devices are favored by more and more users. In the manufacturing process of the flexible display device, a cover plate and a screen body are generally attached together by using a flexible Clear Adhesive (OCA), and the thickness of the flexible OCA is thinner than that of a conventional OCA.

Disclosure of Invention

In view of this, the embodiment of the present invention provides an adhesive film structure, which solves the problems that the existing OCA packaging structure is weak, the OCA is warped due to collision and other phenomena during transportation, and the warpage extends to an adhesive area and then deforms, so that the adhesive area generates bubbles and other phenomena.

An embodiment of the present invention provides an adhesive film structure, including: a first protective layer; a second protective layer disposed on one side of a surface of the first protective layer; the adhesive layer is arranged between the first protective layer and the second protective layer, the area of the adhesive layer is smaller than that of the first protective layer, the area of the adhesive layer is smaller than that of the second protective layer, and the peripheries of the first protective layer and the second protective layer are in contact; and a part of the first protective layer, which is in contact with the second protective layer, is provided with a through hole, wherein the through hole penetrates through the first protective layer and the second protective layer.

In one embodiment, the perforations are arranged at a predetermined distance outside the corners of the adhesive layer.

In one embodiment, the perforations are arranged at a predetermined distance outside the edge of the adhesive layer.

In one embodiment, the adhesive layer is rectangular, and the portion of the first protective layer in contact with the second protective layer is provided with a plurality of perforations, wherein the perforations are respectively arranged outside the boundary of the adhesive layer according to a preset distance.

In one embodiment, the perforations are semi-annular in shape.

In one embodiment, the corners of the first protective layer are rounded; and the corner of the second protective layer is a fillet.

In one embodiment, the radius of the rounded corner is 90 degrees.

In one embodiment, the edges of the first protective layer and the second protective layer are flush.

In one embodiment, the first protective layer and the adhesive layer are attached; the second protective layer is attached to the adhesive layer.

In one embodiment, the adhesive layer is an OCA film.

According to the adhesive film structure provided by the embodiment of the invention, the adhesive layer is arranged between the first protective layer and the second protective layer, the peripheries of the first protective layer and the second protective layer are contacted, so that the adhesive layer is wrapped by the first protective layer and the second protective layer, and the part where the first protective layer is contacted with the second protective layer is provided with the through hole penetrating through the first protective layer and the second protective layer, the through hole can block the collision stress from extending to the position of the adhesive layer, so that the first protective layer and the second protective layer are prevented from warping due to the impact of an external force in the carrying process of the adhesive film structure, and further, bubbles are generated between the first protective layer and the adhesive layer or between the second protective layer and the adhesive layer, so that the adhesive film structure cannot be used and is wasted.

Drawings

Fig. 1 is a schematic structural diagram of an adhesive film structure according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an adhesive film structure according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of an adhesive film structure according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of an adhesive film structure according to another embodiment of the present invention.

As shown in fig. 1 and 2, the adhesive film structure includes a firstprotective layer 1, a secondprotective layer 2, and anadhesive layer 3. The secondprotective layer 2 is disposed on one side of the surface of the firstprotective layer 1, and theadhesive layer 3 is disposed between the firstprotective layer 1 and the secondprotective layer 2. Theadhesive layer 3 may be an adhesive material for bonding the various film layers of the display device together. Firstprotective layer 1 and secondprotective layer 2 set up respectively in the both sides onadhesive layer 3 surface, and firstprotective layer 1 and secondprotective layer 2 play the guard action toadhesive layer 3's both sides, can prevent that the dust from adhering onadhesive layer 3, also can prevent thatadhesive layer 3 from damaging in the transportation. The area of theadhesive layer 3 can be smaller than that of the firstprotective layer 1, the area of theadhesive layer 3 can be smaller than that of the secondprotective layer 2, and the peripheries of the firstprotective layer 1 and the secondprotective layer 2 are in contact with each other, so that theadhesive layer 3 is wrapped between the firstprotective layer 1 and the secondprotective layer 2. Wherein, the contact part of the firstprotective layer 1 and the secondprotective layer 2 is provided with aperforation 4, and theperforation 4 penetrates through the firstprotective layer 1 and the secondprotective layer 2. Theadhesive layer 3 is arranged between the firstprotective layer 1 and the secondprotective layer 2, the peripheries of the firstprotective layer 1 and the secondprotective layer 2 are contacted, so that theadhesive layer 3 is wrapped by the firstprotective layer 1 and the secondprotective layer 2, aperforation 4 penetrating through the firstprotective layer 1 and the secondprotective layer 2 is arranged at the contact part of the firstprotective layer 1 and the secondprotective layer 2, theperforation 4 can block the collision stress from extending to the position of theadhesive layer 3, and the firstprotective layer 1 and the secondprotective layer 2 are warped due to the impact of external force in the process of carrying the adhesive film structure, so that bubbles are generated between the firstprotective layer 1 and theadhesive layer 3 or between the secondprotective layer 2 and theadhesive layer 3, because theadhesive layer 3 can be used for bonding each film layer of the display device and plays a role of isolating water and oxygen, after bubbles are generated, oxygen and water enter theadhesive layer 3, thereby causing the adhesive film structure to be unusable and causing waste.

It is understood that theAdhesive layer 3 may be an acrylic double-sided tape, such as an OCA (Optically Clear Adhesive), and the like, theAdhesive layer 3 may also be other materials, and the specific material of theAdhesive layer 3 may be selected, and the specific material of theAdhesive layer 3 is not limited in the present invention.

It can also be understood that the adhesive film structure can be used for bonding a touch screen and a display panel, and can also be used for bonding other film layers, the specific use of the adhesive film structure can be selected, and the specific use of the adhesive film structure is not limited in the invention.

It is also understood that the number of theperforations 4 may be one or more, the number of theperforations 4 may be selected according to actual product requirements, and the specific number of theperforations 4 is not limited by the present invention.

In an embodiment of the invention, theperforations 4 are arranged at a predetermined distance outside the corners of theadhesive layer 3. Theperforation 4 is arranged at the position where thefirst protection layer 1 and thesecond protection layer 2 are contacted, and the projection of theperforation 4 on the first protection layer has a preset distance from the projection of theadhesive layer 3 on thefirst protection layer 1. Because, the turning of glued membrane structure is in the easy emergence of the handling and collides with, lead to firstprotective layer 1 or the 2 warpages of second protective layer, set upperforation 4 in the corner ofadhesive layer 3 according to the default distance, can disperse the position that collision stress extends toadhesive layer 3, prevent that the turning of glued membrane structure is in the in-process of handling, because the impact that receives external force takes place the warpage, and then make the corner between firstprotective layer 1 and theadhesive layer 3 or the corner between secondprotective layer 2 and theadhesive layer 3 produce the bubble, becauseadhesive layer 3 can be used to bond each rete of display device, and play isolated water oxygen's effect, after producing the bubble, oxygen and water get intoadhesive layer 3, thereby lead to glued membrane structure unable the use, cause the waste.

It can be understood that the preset distance can be set according to actual product requirements, and the specific numerical value of the preset distance is not limited by the invention.

In an embodiment of the present invention, the throughholes 4 are disposed at the outer side of the edge of theadhesive layer 3 according to a predetermined distance, the throughholes 4 are disposed at the position where the firstprotective layer 1 and the secondprotective layer 2 contact each other, and the projection of the throughholes 4 on the first protective layer is a predetermined distance from the projection of theadhesive layer 3 on the firstprotective layer 1. Withperforation 4 according to the outside on the limit of preset distance setting atadhesive layer 3, can disperse collision stress and extend toadhesive layer 3's position, prevent the edge of glued membrane structure at the in-process of transport, because the impact that receives external force takes place the warpage, and then make between firstprotective layer 1 andadhesive layer 3 or between secondprotective layer 2 andadhesive layer 3 at the edge production bubble, becauseadhesive layer 3 can be used for bonding each rete of display device, and play isolated water oxygen's effect, after the production bubble, oxygen and water get intoadhesive layer 3, thereby lead to the glued membrane structure unable use, cause the waste.

It can be understood that the preset distance can be set according to actual product requirements, and the specific numerical value of the preset distance is not limited by the invention.

In an embodiment of the present invention, the number of the throughholes 4 may be multiple, the multiple throughholes 4 may be distributed at a contact portion between thefirst protection layer 1 and thesecond protection layer 2 according to a preset manner, a projection of the multiple throughholes 4 on thefirst protection layer 1 is distributed at a preset distance from a projection of theadhesive layer 3 on thefirst protection layer 1, and a projection of the multiple throughholes 4 on thefirst protection layer 1 is distributed outside a boundary of a projection of theadhesive layer 3 on thefirst protection layer 1. The number and distribution of theperforations 4 can be set according to actual product requirements, and the number and distribution of theperforations 4 are not limited in the present invention.

In an embodiment of the present invention, theadhesive layer 3 may be rectangular, and a portion of the firstprotective layer 1, which is in contact with the secondprotective layer 2, is provided with four throughholes 4, wherein the four throughholes 4 are respectively disposed at outer sides of four corners of theadhesive layer 3 according to a predetermined distance, in other words, the four throughholes 4 are respectively disposed at positions of the four corners of a projection of theadhesive layer 3 on the firstprotective layer 1 or the secondprotective layer 2, and a projection of the four throughholes 4 on the firstprotective layer 1 is a predetermined distance from an outer side of the corner of the projection of theadhesive layer 3 on the firstprotective layer 1. All set upperforation 4 in the position of every angle ofadhesive layer 3 projection on firstprotective layer 1 or secondprotective layer 2, andperforation 4 has the predetermined distance apart from the projection ofadhesive layer 3 on firstprotective layer 1, can protect every corner of glued membrane structure, prevent because the collision in the in-process of transportation, make firstprotective layer 1 and secondprotective layer 2 take place the warpage, lead to firstprotective layer 1 andadhesive layer 3, the part of secondprotective layer 2 andadhesive layer 3 contact produces the bubble, becauseadhesive layer 3 can be used to bond each rete of display device, and play the effect of isolated water oxygen, after producing the bubble, oxygen and water get intoadhesive layer 3, thereby lead to the glued membrane structure to be unable to use, cause the waste.

In an embodiment of the present invention, thethrough hole 4 may be semi-annular. The use ofsemi-annular perforations 4 allows to better alleviate and distribute the impact stresses,

it is understood that the circumference and width of the semi-circular shape of theperforation 4 can be set according to practical situations, and the invention does not limit the radian and width of theperforation 4.

In an embodiment of the present invention, the corner of thefirst passivation layer 1 may be a rounded corner, and the corner of thesecond passivation layer 2 may also be a rounded corner. Thefirst passivation layer 1 may have a rectangular shape with four rounded corners, and thesecond passivation layer 2 may also have a rectangular shape with four rounded corners. The firstprotective layer 1 and the secondprotective layer 2 may be identical in size and shape, and the peripheral edge of the firstprotective layer 1 and the peripheral edge of the secondprotective layer 2 may be completely overlapped. Set the corner with firstprotective layer 1 and secondprotective layer 2 to the fillet, can alleviate and disperse collision stress, prevent the glued membrane structure at the in-process of transport, owing to receive the impact of external force, make firstprotective layer 1 and secondprotective layer 2 take place the warpage, and then make the part of contact between firstprotective layer 1 and theadhesive layer 3 or the part of contact between secondprotective layer 2 and theadhesive layer 3 produce the bubble, becauseadhesive layer 3 can be used to bond each rete of display device, and play the effect of isolated water oxygen, after the production bubble, oxygen and water get intoadhesive layer 3, thereby lead to the glued membrane structure unable use, cause the waste.

It can be understood that the corner may be a rounded corner, wherein the radian of the rounded corner may be 90 degrees, and may also be other radians, and the radian of the rounded corner may be set according to the actual situation, and the specific radian of the rounded corner is not limited by the present invention.

It can also be understood that the size and shape of thefirst protection layer 1 and thesecond protection layer 2 may be completely the same, and the peripheral edge of thefirst protection layer 1 and the peripheral edge of thesecond protection layer 2 may be completely overlapped, so as to prevent thefirst protection layer 1 and thesecond protection layer 2 from warping and affecting the use of the adhesive film structure. The size and shape of the firstprotective layer 1 and the secondprotective layer 2 may be different, and the peripheral edge of the firstprotective layer 1 may also be larger than the peripheral edge of the secondprotective layer 2, or the peripheral edge of the firstprotective layer 1 may also be smaller than the peripheral edge of the secondprotective layer 2, so that the firstprotective layer 1 or the secondprotective layer 2 is conveniently torn off from theadhesive layer 3 during the attaching process. The size and shape of the firstprotective layer 1 and the secondprotective layer 2 may be set according to actual conditions, and whether the peripheral edge of the firstprotective layer 1 and the peripheral edge of the secondprotective layer 2 completely overlap or not may also be set according to actual conditions.

In one embodiment of the present invention, the firstprotective layer 1 is attached to theadhesive layer 3, and the secondprotective layer 2 is attached to theadhesive layer 3. Becauseadhesive layer 3 can have the adhesion, the adhesion of accessibleadhesive layer 3 self is with the laminating of firstprotective layer 1 and secondprotective layer 2 in the both sides ofadhesive layer 3, it is fixed with the laminating of adhesive layer with firstprotective layer 1,adhesive layer 3 and secondprotective layer 2, can prevent at the in-process of transport, the change of position appears between firstprotective layer 1,adhesive layer 3 and the 2 adhesive layers of second protective layer, lead to firstprotective layer 1 and secondprotective layer 2 can not play the guard action toadhesive layer 3, thereby influence the use of glued membrane structure.

It can be understood that the firstprotective layer 1 and theadhesive layer 3 can be fixed together by means of adhesive bonding or electrostatic adsorption, the secondprotective layer 2 and theadhesive layer 3 can be fixed together by means of adhesive bonding or electrostatic adsorption, and the fixing modes between the firstprotective layer 1 and theadhesive layer 3 and between the secondprotective layer 2 and theadhesive layer 3 can be set according to actual requirements, and the fixing modes between the firstprotective layer 1 and theadhesive layer 3 and between the secondprotective layer 2 and theadhesive layer 3 are not limited in the present invention.

It should be further understood that thefirst protection layer 1 and thesecond protection layer 2 may or may not be fixed to each other, whether thefirst protection layer 1 and thesecond protection layer 2 are fixed to each other may be selected according to actual product requirements, and whether thefirst protection layer 1 and thesecond protection layer 2 are fixed to each other is not limited in the present invention.

It can be further understood that thefirst protection layer 1 and thesecond protection layer 2 can be fixed together by means of adhesive bonding or electrostatic adsorption, and the fixing manner between thefirst protection layer 1 and thesecond protection layer 2 can be set according to actual requirements, and the fixing manner between thefirst protection layer 1 and thesecond protection layer 2 is not limited in the present invention.

In an embodiment of the present invention, the adhesive film structure includes afirst protection layer 1, asecond protection layer 2 and anadhesive layer 3. Wherein theadhesive layer 3 is arranged between the firstprotective layer 1 and the secondprotective layer 2, the areas of the firstprotective layer 1 and the secondprotective layer 2 are both larger than the area of theadhesive layer 3, and the peripheries of the firstprotective layer 1 and the secondprotective layer 2 are in contact. A throughhole 4 is arranged at the position where thefirst protection layer 1 and thesecond protection layer 2 are contacted, the projection of the throughhole 4 on thefirst protection layer 1 is arranged at the outer side of the corner of the projection of theadhesive layer 3 on thefirst protection layer 1, and the projection of the throughhole 4 on thefirst protection layer 1 has a preset distance from the outer side of the corner of the projection of theadhesive layer 3 on thefirst protection layer 1. For example, when the adhesive film structure is used for attaching a display screen body and a cover plate, the firstprotective layer 1 can be torn off from theadhesive layer 3, one side with theadhesive layer 3 is attached to the display screen body, the attached display screen body, theadhesive layer 3 and the secondprotective layer 2 are conveyed to the position of the attached cover plate, the secondprotective layer 2 is torn off, the cover plate is attached to theadhesive layer 3, and then the structure of the cover plate-the adhesive layer 3-the display screen body is formed. Because the process of carrying the adhesive film structure and the display screen body, the adhesive layer 3 and the second protective layer 2 exists, the second protective layer 2 is easy to collide in the carrying process to cause the deformation of the second protective layer 2, and the air bubble phenomenon is easy to appear at the position of the adhesive layer 3, therefore, the adhesive layer 3 is arranged between the first protective layer 1 and the second protective layer 2, the peripheries of the first protective layer 1 and the second protective layer 2 are contacted, the first protective layer 1 and the second protective layer 2 wrap the adhesive layer 3, a perforation 4 penetrating through the first protective layer 1 and the second protective layer 2 is arranged at the contact part of the first protective layer 1 and the second protective layer 2, the perforation 4 can block the collision stress from extending to the position of the adhesive layer 3, and the adhesive film structure is prevented from warping due to the impact of external force in the carrying process, and then make the part of contact between first protective layer 1 and the adhesive layer 3 or the part of contact between second protective layer 2 and the adhesive layer 3 produce the bubble, because adhesive layer 3 can be used for bonding each rete of display device to play the effect of isolated water oxygen, after producing the bubble, oxygen and water get into adhesive layer 3, thereby lead to the glued membrane structure unable use, cause the waste.

It is understood that thefirst protection layer 1 may be torn off first, or thesecond protection layer 2 may be torn off first, and the tearing sequence of thefirst protection layer 1 and thesecond protection layer 2 may be selected, and the tearing sequence of thefirst protection layer 1 and thesecond protection layer 2 is not limited in the present invention.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.

Claims (10)

1. An adhesive film structure, comprising:

a first protective layer;

a second protective layer disposed on one side of a surface of the first protective layer;

the adhesive layer is arranged between the first protective layer and the second protective layer, the area of the adhesive layer is smaller than that of the first protective layer, the area of the adhesive layer is smaller than that of the second protective layer, and the peripheries of the first protective layer and the second protective layer are in contact; and

the contact part of the first protective layer and the second protective layer is provided with a perforation, wherein the perforation penetrates through the first protective layer and the second protective layer.

2. The adhesive film structure according to claim 1, wherein the perforations are provided at predetermined distances outside corners of the adhesive layer.

3. Adhesive film structure according to claim 1, wherein the perforations are arranged at a predetermined distance outside the edge of the adhesive layer.

4. The adhesive film structure of claim 1, wherein the adhesive layer is rectangular, and a plurality of through holes are formed in a portion where the first protective layer and the second protective layer are in contact with each other, wherein the plurality of through holes are respectively formed outside a boundary of the adhesive layer at a predetermined distance.

5. The adhesive film structure of claim 1, wherein the perforations are semi-annular in shape.

6. The adhesive film structure of claim 1, wherein the corners of the first protective layer are rounded;

and the corner of the second protective layer is a fillet.

7. The adhesive film structure of claim 6, wherein the arc of the rounded corner is 90 degrees.

8. The adhesive film structure of claim 1, wherein edges of the first protective layer and the second protective layer are flush.

9. The adhesive film structure of claim 1, wherein the first protective layer is attached to the adhesive layer;

the second protective layer is attached to the adhesive layer.

10. The adhesive film structure of claim 1, wherein the adhesive layer is OCA.

Images