KR20210062326A - Rollable plate for the electonic device and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a rollable plate material. Provided is the rollable plate material, which includes: a base skin layer of flexible material; and a core layer having a support structure layer laminated on one surface of the base skin layer, wherein in the core layer, a plurality of slits penetrating the core layer are formed to extend in a horizontal direction and to be sequentially spaced apart from each other in a vertical direction, and the core layer is provided with a plurality of support structures extending along a transverse direction by the plurality of slits and arranged to be sequentially spaced apart along a longitudinal direction, wherein the width of the support structures increases from a lower portion to an upper portion of the rollable plate material.

Description

Roll-shaped rollable plate for electronic equipment and its manufacturing method {ROLLABLE PLATE FOR THE ELECTONIC DEVICE AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a roll-shaped rollable plate for electronic equipment and a method for manufacturing the same, and more particularly, to a roll-shaped rollable plate for electronic equipment that can be used as a support structure for supporting a display device, etc. that can be rolled up from the back, and its manufacturing method. It relates to a manufacturing method.

Recently, as the use of display panels such as OLEDs has become common, the development of thin and large-area display devices has been widely made. Since thin display panels such as OLED are vulnerable to impact, a support structure that is bonded to the rear surface of the display panel and supports the display panel is used to prevent damage due to impact. As a prior art of such a support structure, Patent No. 10-1832301 discloses a configuration including a core layer and a skin layer positioned on both sides of the core layer. Recently, in order to increase the usability, a technology for a display device (rollable display device) that can be wrapped and stored on a roller and unfolded for use has also been developed. However, since the conventional support structure as described above is not a structure that can be easily bent, there is a problem that it cannot be applied to such a rollable display device.

Republic of Korea Patent Publication Registration No. 10-1832301 (February 26, 2018)

An object of the present invention is to provide a roll-shaped rollable plate material for an electronic device and a method of manufacturing the same.

Another object of the present invention is to provide a roll-shaped rollable plate material for electronic devices suitable for use as a support structure of a rollable display device, and a method of manufacturing the same.

In order to achieve the object of the present invention as described above, according to an aspect of the present invention, in a rollable plate, the base skin layer of a flexible material; And a core layer having a support structure layer stacked on one surface of the base skin layer, wherein a plurality of slits penetrating the core layer extend along a horizontal direction and are sequentially spaced apart along a vertical direction in the core layer. It is formed to be disposed, and the core layer includes a plurality of support structures extending along the horizontal direction by the plurality of slits and sequentially spaced apart along the vertical direction, and from the lower part to the upper part of the rollable plate. There is provided a rollable plate material in which the width of the support structures becomes wider.

In order to achieve the above object of the present invention, according to another aspect of the present invention, in a rollable plate, the base skin layer of a flexible material; And a core layer having a support structure layer stacked on one surface of the base skin layer, wherein a plurality of slits penetrating the core layer extend along a horizontal direction and are sequentially spaced apart along a vertical direction in the core layer. It is formed to be disposed, and the core layer includes a plurality of support structures extending along the horizontal direction by the plurality of slits and sequentially spaced apart along the vertical direction, and from the lower part to the upper part of the rollable plate. There is provided a rollable plate material in which the gap between the support structures becomes wider.

According to the present invention, all the objects of the present invention described above can be achieved. Specifically, since a plurality of slits are formed to extend parallel to the core layer stacked on the base skin layer, the plate material can be wound along a direction perpendicular to the extending direction of the slit, such as OLED for a rollable display device. It can be suitably used as a support structure for a flexible display.

In addition, the core layer is formed of a composite material including a plurality of reinforcing fibers arranged in parallel, and the slit is formed to extend parallel to the arrangement direction of the reinforcing fibers, so that rigidity is maintained in a direction perpendicular to the winding direction. do.

In addition, since the material forming each layer of the rollable plate according to the present invention is formed of a composite material including a resin material, and the resin material included in each layer is made of the same type, it is bonded through heat fusion to The bonding force can be kept strong.

In addition, the width of the support structures becomes wider or the gap between the support structures increases as it goes from the lower part to the upper part of the rollable plate, so that it becomes easier to roll the roll-up thin plate as a whole.

1 is a perspective view of a rollable plate according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line A-A' of the rollable plate shown in FIG. 1.
FIG. 3 is a front view of the take-up sheet material shown in FIG. 1, showing a state in which the protective skin layer shown in FIG. 2 is removed.
FIG. 4 shows a state in which the rollable plate material shown in FIG. 2 is bent.
FIG. 5 shows a state in which the rollable plate shown in FIG. 1 is wound and wound.
6 is a cross-sectional view showing a rollable plate according to another embodiment of the present invention.
7 is a flow chart showing a method of manufacturing a rollable plate according to an embodiment of the present invention.
8 is a view for explaining a method of manufacturing the rollable plate shown in FIG. 7.

1 is a perspective view of a rollable plate according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the rollable plate shown in FIG. 1 taken along line A-A'. 1 and 2, the rollable plate 100 according to an embodiment of the present invention has a flat plate shape, and a base skin layer 110 and a core layer 150 stacked on the base skin layer 110 And, a protective skin layer 120 stacked on the core layer 150.

The base skin layer 110 has a flat shape and is made of any flexible material that can be wound and wound. In this embodiment, it will be described that the base skin layer 110 is a woven material or a composite material including a woven material and a resin matrix in which the woven material is impregnated. A core layer 150 is stacked on one surface of the base skin layer 110. The arrangement shape of the core layer 150 is maintained by the base skin layer 110.

The core layer 150 is formed integrally by being stacked on one surface of the base skin layer 110. The core layer 150 includes a plurality of support structure layers 130 and 140 that are sequentially stacked. In this embodiment, it is described that there are two supporting structure layers 130 and 140, but unlike this, there may be one or three or more, and this also falls within the scope of the present invention. In this embodiment, each of the support structure layers 130 and 140 will be described as being a fiber-reinforced plastic (FRP) material including a reinforcing fiber made of long fibers and a resin matrix impregnated with the reinforcing fibers. The reinforcing fibers of the fiber-reinforced plastic used in the support structure layers 130 and 140 are arranged to extend in parallel in one direction (the horizontal direction of the X-axis in FIG. 3). Are all arranged to extend parallel in the same direction. In this embodiment, carbon fiber, glass fiber, aramid fiber, boron fiber, quartz fiber, alumina fiber, etc. may be used alone or in combination as the reinforcing fiber. As the matrix resin, a thermoplastic resin or a thermosetting resin can be used, and as the thermoplastic resin, polyethylene (PE), polypropylene (PP), polyamide (PA), polyethylene terephthalate (PET), polybutylene terephthalate (PBT) ) Polyester, polycarbonate (PC), polyphenylene sulfur (PPS), polyetherimide (PEI), polyacetal (POM), polyacrylonitrile, polyethylmethacrylate (PMMA), etc. Acrylic resin, polyetheretherketone (PEEK) polyphenylene oxide (PPE), ABS resin, polystyrene (PS), polyurethane (TPU), polyphenylene sulfide, etc. can be used, and the thermosetting resin is epoxy resin, unsaturated Polyester resins, phenol resins, vinyl ester resins, melamine resins, and the like may be used. In the case of the thermoplastic resin, it is preferable to use the same resin as the matrix resin used for the supporting skin layer 110 of the composite material, and in this case, the base skin layer 110 and the core layer 150 can be easily heat-sealed. .

In this embodiment, the core layer 150 has a structure of carbon fiber reinforced plastic (CFRP). Fibers used in the carbon fiber reinforced plastic may be unidirectional continuous fibers, woven fibers, or the like. In addition, a CFRP reinforcement plate manufactured using LFPS (long fiber prepreg sheet) with improved formability can also be used.

2 and 3, a plurality of slits 160 disposed in parallel are formed in the core layer 150. In the drawing, the plurality of slits 160 are sequentially spaced apart along the vertical direction (the Y axis direction in FIG. 3), and each of the plurality of slits 160 extends along the horizontal direction, which is the X axis. The slit 160 is formed over all the supporting structure layers 130 and 140, and the depth of the slit 160 is preferably formed so that the base skin layer 110 is exposed on the bottom of the slit 160. The plurality of slits 160 are disposed at equal intervals along the vertical direction, and a plurality of support structures 151 separated from the core layer 150 by the plurality of slits 160 are formed. The plurality of support structures 151 are spaced at equal intervals along the vertical direction and disposed parallel to each other, and extend in a straight line along the horizontal direction in a bar shape. As shown in FIG. 3, the reinforcing fibers 152 forming the core layer 150 are arranged along the transverse direction so as to be parallel to the longitudinal direction of the support structure 151. Accordingly, it is prevented that the rollable plate member 100 bends in the left and right width directions. In this embodiment, it will be described that the slit 160 has a rectangular cross-sectional shape.

The protective skin layer 120 is laminated on the plurality of support structures 151 to protect the surfaces of the plurality of support structures 151. The same material as the base skin layer 110 may be used as the protective skin layer 120.

4 shows a state in which the rollable plate 100 is bent. Referring to FIG. 4, the rollable plate 100 may be easily bent by a plurality of support structures 151 spaced apart from each other, and eventually may be wound and wound as shown in FIG. 5. The rollable plate 100 may be used as a reinforcing structure of a rollable display device. By installing a flexible display such as OLED on one surface of the rollable plate 100, a rollable display device may be manufactured. In this embodiment, it is described that the rollable plate 100 is wound in one direction as shown in FIG. 5 and is wound, but, unlike this, by adjusting the spacing and width between the slits 160, in a zigzag form. It may be a folding structure, which is also within the scope of the present invention.

In FIGS. 1 to 5, the support structures 151 have the same width. However, the present invention is not limited thereto, and the width of the support structures 151 may be wider from the bottom to the top of the rollable plate 100. When the rollable sheet material 100 is rolled in a roll shape, the support structures 151 located inside and the support structures 151 located outside have different curvatures from each other. Due to this difference in curvature, it is difficult for the rollable plate 100 to wind up a circular roll shape. However, by gradually increasing the width of the support structures 151, it can be easily wound in a roll shape in a specific direction.

In addition, even when the widths of the support structures 151 are the same, this problem may be solved by increasing the distance between the support structures 151 from the bottom of the rollable plate 100 to the top. Therefore, the rollable plate 100 can be easily wound in a roll shape in a specific direction.

In the above embodiment, the slit 160 is described as having a rectangular cross-sectional shape, but the present invention is not limited thereto. 6 is a cross-sectional view showing a structure of a rollable plate according to another embodiment of the present invention in which slits of different shapes are formed. Referring to FIG. 6, the rollable plate 200 includes a base skin layer 110, a core layer 250 stacked on the base skin layer 110 and having two support structure layers 230 and 240, And a protective skin layer 120 stacked on the core layer 250. A plurality of slits 260 are formed in the core layer 250, and the slits 260 have a generally triangular cross-sectional shape, and thus have a wider width as the distance from the base skin layer 110 increases.

In the above embodiments, it is described that the rollable plates 100 and 200 include the protective skin layer 120, but unlike this, the protective skin layer 120 may not be included, and this also falls within the scope of the present invention. will be.

7 is a flow chart illustrating an embodiment of a method of manufacturing the rollable plate 100 described above. Referring to FIG. 7, the method of manufacturing a rollable plate of the present invention includes a core layer bonding step (S10), a protective skin layer bonding step (S20), and a slit forming step (S20).

7 and 8, in the core forming layer bonding step (S10 ), the core forming layer 150a is bonded to one surface of the base skin layer 110. The base skin layer 110 is the base skin layer 110 shown in FIG. 2, and the core forming layer 150a is a layer that forms the core layer 150 shown in FIG. 2 through additional processing. When the core forming layer 150a includes a plurality of support structure forming layers 130a and 140a (corresponding to the support structure layers 130 and 140 shown in FIG. 2), a plurality of support structure forming layers in a state of being bonded in advance ( The core forming layer 150a including the 130a and 140a may be bonded to the base skin layer 110, or a plurality of support structure forming layers 130a and 140a may be sequentially stacked and bonded to the base skin layer 110. When the base skin layer 110 is a composite material including a woven material and a resin matrix impregnated with the woven material, and the core forming layer 150 is a fiber-reinforced plastic composite material including a reinforcing fiber and a resin matrix, the base skin layer 110 It is preferable that the resin matrix of) and the resin matrix of the core forming layer 150 are the same resin, and at this time, the bonding force between the base skin layer 110 and the core forming layer 150 may be strongly maintained by thermal fusion.

In the protective skin layer bonding step (S20), the protective skin-forming layer 120a is bonded on the core-forming layer 150a. The protective skin forming layer 120a is a composite material including a woven material and a resin matrix impregnated with the woven material, such as the basic skin layer 110, and the core forming layer 150a is a fiber-reinforced plastic composite material including reinforcing fibers and a resin matrix. In this case, it is preferable that the resin matrix of the protective skin forming layer 120a and the resin matrix of the core forming layer 150a are the same resin, and at this time, the bonding force between the protective skin forming layer 120a and the core forming layer 150a by thermal fusion This can be kept strong. In this case, the bonding step S10 of the core forming layer and the bonding step S20 of the protective skin forming layer may be performed simultaneously. That is, by performing thermal fusion in a state in which the core forming layer 150a and the protective skin forming layer 120a are sequentially stacked on the base skin layer 110, the base skin layer 110, the core forming layer 150a, and the protective skin The formation layers 120a may be bonded together.

When the rollable plate (100 in FIG. 1) does not have a protective skin layer, the protective skin bonding step (S20) is omitted.

In the slit forming step S30, a plurality of slits (160 in FIG. 2) are formed in the core forming layer 150a bonded to the base skin layer 110 and the protective skin forming layer 120a. The plurality of slits (160 in FIG. 2) are formed by removing the core forming layer 150a and the protective skin forming layer 120a in sections marked “A” as shown in FIG. 8 by a method such as cutting. Depending on the form of removal, the slit has a rectangular cross-sectional shape as shown in FIG. 2 or a triangular cross-sectional shape as shown in FIG. 6.

Although the present invention has been described through the above embodiments, the present invention is not limited thereto. The above embodiments may be modified or changed without departing from the spirit and scope of the present invention, and those skilled in the art will recognize that such modifications and changes also belong to the present invention.

100: rollable sheet 110: base skin layer
120: protective skin layer 120a: protective skin forming layer
150: core layer 150a: core forming layer
130, 140: supporting structure layer 151: supporting structure part
152: reinforcing fiber 160: slit

Claims (11)

In the rollable sheet,
A base skin layer made of a flexible material; And
It includes a core layer having a support structure layer stacked on one surface of the base skin layer,
The core layer is formed such that a plurality of slits penetrating the core layer extend along a horizontal direction and are sequentially spaced apart along a vertical direction,
The core layer includes a plurality of support structures extending along the horizontal direction by the plurality of slits and sequentially spaced apart along the vertical direction,
A rollable plate in which the width of the support structures increases from a lower portion to an upper portion of the rollable plate. In the rollable sheet,
A base skin layer made of a flexible material; And
It includes a core layer having a support structure layer stacked on one surface of the base skin layer,
The core layer is formed such that a plurality of slits penetrating the core layer extend along a horizontal direction and are sequentially spaced apart along a vertical direction,
The core layer includes a plurality of support structures extending along the horizontal direction by the plurality of slits and sequentially spaced apart along the vertical direction,
A rollable plate in which a gap between the support structures increases from a lower portion to an upper portion of the rollable plate. The method according to claim 1 or 2,
The base skin layer is a rollable plate material that is a composite material including a woven material and a resin matrix. The method according to claim 1 or 2,
A rollable plate material further comprising a protective skin layer laminated on the core layer. The method according to claim 1 or 2,
The protective skin layer is a rollable plate material that is a composite material including a woven material and a resin matrix. The method according to claim 1 or 2,
The support structure layer is plural, and the plurality of support structure layers are sequentially stacked on the base skin layer to form the core layer. The method according to claim 1 or 2,
The support structure layer is a rollable plate material comprising reinforcing fibers and a resin matrix impregnated with the reinforcing fibers. The method of claim 7,
The reinforcing fibers are made of long fibers, the reinforcing fibers are extended to be arranged in parallel along one direction, and the reinforcing fibers are arranged to extend parallel to the extending direction of the slit. The method according to claim 1 or 2,
Each of the base skin layer and the core layer is a composite material including a resin matrix,
The resin matrix of the base skin layer and the resin matrix of the core layer are made of the same resin material. The method according to claim 1 or 2,
Further comprising a protective skin layer laminated on the core layer,
Each of the base skin layer, the core layer, and the protective skin layer is a composite material including a resin matrix,
The resin matrix of the base skin layer, the resin matrix of the core layer, and the resin matrix of the protective skin layer are made of the same resin material. The method according to claim 1 or 2,
A rollable plate material through which the base skin layer is exposed through a slit.

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