JPWO2020153345A1 - Seal member and composite seal structure - Google Patents

Abstract

Provided is a sealing member that makes it easier for workers to work and makes it difficult for workers to make mistakes. A strip tape-shaped seal member 1 that is compression-arranged between the first member 60 and the second member 70, and is provided inside the gel molded body 10 and the gel molded body 10 in the longitudinal direction of the seal member 1. The seal member 1 is provided with an elongation inhibitor 20 that suppresses the elongation of the seal member 20 and has gel ends 11 that do not have the elongation inhibitor 20 at both ends in the longitudinal direction. [Selection diagram] FIG. 8

Description

The present invention comprises a tape-shaped seal member that is compression-arranged between a first member and a second member such as a frame-shaped housing and a liquid crystal panel in a liquid crystal display device, and the seal members are the first member and the second member. The present invention relates to a composite seal structure obtained by sandwiching it with a member.

In devices such as liquid crystal displays or solar cell panels, when assembling the liquid crystal panel or solar panel to the frame-shaped housing, double-sided tape, adhesive, or curable resin is sandwiched between them to firmly fix them. Was. However, when the panel is peeled off for repair or disassembly, the adhesive force is too strong and the panel or the frame-shaped housing may be bent or damaged.

Instead of such double-sided tape or adhesive, it is already available as a sealant that can be peeled off, exhibits waterproof and dustproof properties, has ultra-low hardness, absorbs impact on the panel, and functions to prevent distortion of the panel. The applicant has developed a sealing member made of a gel molded product, and this technique is disclosed in International Publication No. 2012/161099 (Patent Document 1).

International Publication No. 2012/161099

However, as the size of the liquid crystal panel or solar panel increases, the size of the frame-shaped seal member also increases, and the seal member is elongated and soft and easily stretches. Once stretched, it does not fit in the housing and is difficult to handle. In some cases. In addition, the molding mold for the frame-shaped seal member has also become large, and problems in productivity have become more likely to occur. Therefore, an object of the present invention is to provide a sealing member and a composite sealing structure that make it easier for an operator to work and make it difficult for a worker to make a mistake.

One aspect of the present invention that achieves the above object can be configured as the seal member and the composite seal structure described below.

That is, the seal member according to one aspect of the present invention is a gel-molded body and the gel-molded body provided inside the gel-molded body for a tape-shaped seal member that is compression-arranged between the first member and the second member. It is provided with an elongation inhibitor that suppresses the elongation of the body, and is characterized by having gel ends that do not have the elongation inhibitor at both ends of the gel molded body.

Since this seal member includes a gel molded body, it is soft and has a fixed shape, and when sandwiched between the first member and the second member, both members can be sealed even with a low load, and the reworkability is also excellent. Further, since the stretch suppressor that suppresses the stretch of the gel molded body is provided, the dimensional change of the seal member is unlikely to occur. Further, since the gel end is formed at the end, the gel ends of the two sealing members can be placed on top of each other, and the overlapped portion does not have an elongation inhibitor, so that the two seal members are compressed. Since it is easy and the compressive load at the relevant portion is unlikely to increase even if they are overlapped, waterproofness and dustproofness can be achieved with a low load. Since it has a tape shape, it can be a sealing member having excellent moldability, productivity, and handleability.

The elongation inhibitor has an opening in the thickness direction, and can be configured as if the gel constituting the gel molded product has penetrated into the opening. Since the elongation inhibitor has an opening in the thickness direction and the gel constituting the gel molded body has penetrated into the opening, the adhesion between the elongation inhibitor and the gel molded body can be improved, and the elongation inhibitor can be improved. It is difficult to separate the gel from the gel molded body, and it is easy to obtain a reinforcing effect including an elongation inhibitor.

In one aspect of the present invention, it can be configured as a sealing member having different adhesiveness between one surface and the other surface of the front and back surfaces of the gel molded product. Since the adhesiveness of one side and the other side of the front and back surfaces of the gel molded product is different, it is possible to provide a surface on the surface of the gel molded product that can easily peel off the protective film.

In one aspect of the present invention, it can be configured as a sealing member in which the length of the gel end portion in the longitudinal direction of the tape shape is substantially the same as the length in the width direction of the tape shape. Since the length of the gel end in the longitudinal direction of the tape shape is substantially the same as the length in the width direction of the tape shape, both seals are used when the gel ends of the two sealing members are overlapped with each other. Even if the members are overlapped in the longitudinal direction or in the orthogonal direction, the portion where the overlap does not occur can be eliminated, and the gel ends can be efficiently overlapped with each other.

In one aspect of the present invention, a protective film can be provided on the surface of the gel molded product. Since the protective film is provided on the surface of the gel molded product, it is possible to prevent dust from adhering to the surface of the gel molded product and keep it clean.

Then, in one aspect of the present invention, it can be configured as a composite seal structure having any of the seal members, the first member, and the second member. Since the composite seal structure includes any of the seal members, the first member, and the second member, the seal member can be compressed even if the first member and the second member are compressed with a light compression load. The inside sealed with is waterproof and dustproof.

In one aspect of the present invention, the first member can be configured as a frame-shaped housing in a liquid crystal display device, and the second member can be configured as a liquid crystal panel. Since the first member is a frame-shaped housing in the liquid crystal display device and the second member is a liquid crystal panel, the inside of the device in the liquid crystal display device can be made waterproof and dustproof.

In one aspect of the present invention, the first member can be configured as a frame-shaped housing in a solar cell device, and the second member can be configured as a solar panel. Since the first member is a frame-shaped housing in the solar cell device and the second member is a solar panel, the space between the frame-shaped housing and the solar panel is sealed to make the inside waterproof and dustproof. be able to.

The composite seal structure according to one aspect of the present invention can be configured such that the gel ends of the seal member are overlapped with each other. Even if the gel ends according to one aspect of the present invention are arranged so as to be overlapped with each other, the overlapping portion does not have an elongation inhibitor, so that the compressive load at the overlapped portion does not increase and the load is low. Even if there is, the waterproof and dustproof properties of the composite seal structure can be achieved.

According to the sealing member of the present invention, the gel material is suppressed from stretching and is excellent in handleability while taking advantage of the feature of the gel material having a low compressive load and the adhesiveness. Further, according to the composite seal structure of the present invention, the inside sealed by the seal member can be made waterproof and dustproof.

It is an exploded schematic view of the seal member of 1st Embodiment. It is a seal member of FIG. 1, FIG. A is a schematic plan view thereof, and FIG. B is a sectional view taken along line IIB-IIB of FIG. It is a schematic plan view of a seal member using a mesh-shaped elongation inhibitor, FIG. A is an example in which the mesh of the elongation inhibitor is along the longitudinal direction of the seal member, and diagram B is an example of the elongation inhibitor. This is an example including a mesh arranged diagonally with respect to the longitudinal direction of the seal member. It is sectional drawing of the seal member which has a protective film on both front and back sides. It is sectional drawing which shows the state which laminated the seal member which has a protective film on one side. It is a composite seal structure in which a seal member is sandwiched between a first member and a second member. FIG. A is a plan view thereof, and FIG. B is a sectional view taken along line VB-VB of FIG. It is explanatory drawing explaining how the gel end portions of two seal members are overlapped, and the seal member is continuously arranged in the longitudinal direction of a seal member, and the fraction A is a perspective view explaining a stacking process. FIG. B is a schematic plan view of a portion in which a seal member is laminated on the first member and the second member. It is explanatory drawing explaining how the gel ends of two seal members are overlapped and the two seal members are arranged orthogonally, FIG. A is a perspective view explaining a stacking process, and FIG. , It is a schematic plan view of the portion where the seal member is laminated and arranged on the first member and the second member. It is a schematic plan view of the state in which the seal members are arranged side by side in the lateral direction in the gap between the first member and the second member.

The present invention will be described in more detail based on embodiments. The seal member 1 of the present embodiment includes a gel molded body 10 and an elongation suppressing body 20 provided inside the gel molded body 10 and suppressing the elongation of the seal member 1 in the longitudinal direction. The seal member 1 has gel end portions 11 having no elongation inhibitor 20 at both ends in the longitudinal direction thereof.

The seal member 1 is described as two members (hereinafter, "first member 60" and "second member 70") like the frame-shaped housing 60A and the liquid crystal panel 70A in the liquid crystal display device (see FIG. 6). ) Is a member that is compressed and arranged (compressed arrangement).

In the seal member 1, the gel molded body 10 and the elongation suppressing body 20 are laminated in the thickness direction thereof. FIG. 1 shows a schematic view of the seal member 1 decomposed into layers. As shown in this figure, the seal member 1 is laminated in the order of the front surface side gel molded body 10a, the elongation suppressing body 20, and the back surface side gel molded body 10b from one front surface side. The length of the elongation inhibitor 20 in the longitudinal direction is shorter than the length of the front surface side gel molded body 10a and the back surface side gel molded body 10b in the longitudinal direction, and the longitudinal direction of the strip tape-shaped sealing member 1 formed by laminating these. As shown in FIG. 2A, gel end portions 11 are formed at both ends of the above.

Then, as shown in FIG. 2B, in the seal member 1, the stretch-suppressing body 20 is sandwiched between the seal member 1, and the stretch-inhibiting body 10 is formed by integrating the front-side gel-molded body 10a and the back-side gel-molded body 10b. Surrounding 20. The position where the elongation inhibitor 20 is sandwiched can be moved closer to the front surface side or the back surface side instead of being intermediate in the thickness direction of the gel molded body 10.

The gel molded product 10 is composed of a low-hardness rubber-like, gel-like, or viscous polymer molded product. Examples of the polymer molded product include silicone gel, acrylic gel, urethane gel, hydrogel and the like. Of these, a silicone gel molded product is preferable because it has low hardness and low compression set.

The gel molded body 10 has a tensile fracture strength of 0.05 MPa to 0.15 MPa specified by JIS K6251 (ISO37) and a tensile fracture elongation of 230 to 400% specified by JIS K6251 (ISO37). Is preferable. By having such physical properties, the gel molded body 10 has shape retention and can be molded into a three-dimensional shape.

The gel molded product 10 preferably has a compression set of 5% or less as measured according to JIS K6262 (ISO815), which is a Japanese Industrial Standard. Here, the compression set is a compression set measured at a compression rate in the range of 50% to 80%, which has a large amount of compression, at 70 ° C. and left for 22 hours. Since the compression set of the gel molded body 10 is 5% or less, the gel molded body 10 is compressed in the direction opposite to the compression direction in the state where the gel molded body 10 is compressed between the first member 60 and the second member 70. A strong elastic force is generated, and the gel molded product 10 has a function of returning to the original shape.

The degree of needle insertion of the gel molded product 10 is preferably in the range of 60 to 130. Here, the degree of needle insertion is a value measured under 25 ° C. conditions by a consistency test using a 1/4 conical cone in accordance with JIS K2220 (ISO2137) as defined in JIS K6249. As an index of softness (hardness), there is also the hardness specified by JIS K6253 (ISO7619), but according to the index by type E defined by JIS K6253 (ISO7619), the hardness of the gel molded product 10 is almost 0. Indicates a value. By setting the degree of needle insertion of the gel molded body 10 in the range of 60 to 130, it is extremely flexible as compared with the rubber-like elastic body, and pressure is applied to the first member 60 and the second member 70 more than necessary. There is no. Therefore, even if the seal member 1 is incorporated between the first member 60 and the second member 70, the first member 60 or the second member 70 is not deformed or damaged. Further, according to the seal member 1, excellent adhesion to the first member 60 and the second member 70 can be exhibited.

Since the gel molded body 10 has the above-mentioned properties, it has adhesiveness that makes it easy to adhere to the first member 60 and the second member 70. Such adhesiveness may be the same on one surface and the other surface of both surfaces of the sealing member 1, or may be different. When the adhesiveness is the same, both the front and back surfaces can be formed of the gel molded body 10 made of the same material with the elongation inhibitor 20 sandwiched between them, which facilitates production and keeps the production cost low. On the other hand, if both the front and back surfaces have different adhesiveness, when the first member 60 and the second member 70 are peeled off, the seal member 1 is left on the first member 60 side or the second member 70 side. The seal member 1 can be used intentionally in advance. The seal member 1 having such a property is convenient for parts replacement or repair after the first member 60 and the second member 70 are peeled off.

The highly adhesive surface of the gel molded product 10 can be realized by applying an adhesive, an adhesive, a primer, or the like to the surface of the gel molded product 10 where the adhesiveness is to be increased. On the other hand, on the surface of the gel molded product 10 having low adhesiveness, a mold release agent or fine powder or the like is applied to the surface of the gel molded product 10 to reduce the adhesiveness, or the surface hardness is increased by ultraviolet irradiation or a crosslinking reaction. It can be realized by raising it. Alternatively, by arranging the elongation-suppressing body 20 inside the seal member 1, which will be described later, closer to the surface of the gel molded body 10 that is intended to reduce the adhesiveness, the adhesiveness of the surface of the gel molded body 10 can be made different. Can be provided. On the side away from the elongation-suppressing body 20, the degree of needle insertion of the gel molded body 10 becomes large and becomes softer, so that it is considered that the adhesiveness is increased. Further, the difference in the thickness of the gel molded body 10 existing on the surface of the stretch inhibitor 20 causes a difference in the extensibility of the surface of the gel molded body 10. On the surface away from the stretch inhibitor 20, the gel molded body 10 becomes relatively stretchable, and the adhesiveness can be enhanced.

The elongation inhibitor 20 has a role of reinforcing the gel molded article 10. If the seal member 1 is composed of only the gel molded body 10, the gel molded body 10 is soft and easily stretches when it is pinched and handled by hand, and when it is placed on the first member 60 or the second member 70, it starts from a predetermined portion. There is a risk of sticking out. On the other hand, since the seal member 1 contains the elongation suppressing body 20, it is possible to suppress the elongation of the seal member 1 in the longitudinal direction.

As the elongation suppressing body 20, in order to suppress the elongation of the sealing member 1, for example, a sheet-like material such as a resin film, paper, a woven fabric, a non-woven fabric, a net-like material (including a mesh-like material), or a metal foil can be used. .. These sheet-like objects may have a uniform surface, but a sheet having a large number of openings 21 can also be used. Since the elongation inhibitor 20 has a large number of openings 21, the gel constituting the gel molded body 10 penetrates into the openings 21, so that the sealing member 1 having a low hardness as a whole can be obtained. In order not to hinder the flexibility of the seal member 1, it is preferable to use the elongation inhibitor 20 having a thin thickness. As the elongation inhibitor 20, for example, a resin film having a thickness of 1 μm to 10 μm can be used.

In the elongation inhibitor 20 made of a resin film, the opening 21 can be formed by making a large number of holes. In the stretch inhibitor 20 made of woven cloth, the gap between the cloths is the opening 21. The coarser the texture of the fabric and the larger the gap, the larger the opening 21 can be. Further, the elongation inhibitor 20 made of a net-like material formed by knitting wires, long fibers, short fibers or twisted yarns made of metal or synthetic resin in the vertical and horizontal directions has an opening 21 in the mesh. As the material of the wire, long fiber, short fiber or twisted yarn, in addition to various metals or alloys, synthetic resins such as polyethylene, polyester, polyamide and polyurethane, and natural fibers such as cotton, silk, linen and wool can be used. ..

The shape of the opening 21 of the elongation inhibitor 20 may be any shape, and may be a square, a rectangle, a rhombus, a triangle, a hexagon, a round shape, or the like. When the elongation inhibitor 20 is a net-like object and the shape of the opening 21 thereof becomes longer in the longitudinal direction of the seal member 1, the density of the elongation inhibitor 20 in the longitudinal direction is lower than the density in the lateral direction (in other words). For example, the number of constituent members of the extension suppressing body 20 extending in the longitudinal direction is larger than that in the lateral direction), and the seal member 1 that is difficult to extend in the longitudinal direction can be obtained. The size of the opening 21 of the net-like object is preferably 10 to 5000 μm. The number of openings 21 is preferably 1 to 500 mesh / 2.54 cm, more preferably 10 to 200 mesh / 2.54 cm.

When a net-like material is used for the elongation suppressing body 20, as shown in FIG. 3A, the line segments 22 forming the lattice form a mesh (opening 21) along the longitudinal direction and the lateral direction of the seal member 1. It is preferable to arrange the elongation inhibitor 20 in the. The reason is that the line segment 22 forming the elongation suppressing body 20 formed in a net shape or a mesh shape is difficult to extend in the longitudinal direction of the seal member 1, and the elongation in the longitudinal direction of the seal member 1 can be reduced. Because. With respect to the arrangement of the elongation suppressing body 20, when the stretching suppressing body 20 is arranged so that the line segment 22 forming the lattice is oblique to the longitudinal direction of the seal member 1, as shown in FIG. 3B. , The net-like material is easily deformed in the longitudinal direction of the seal member 1.

The intersections (intersections) of the nets of the net-like material may have knots, be crushed and flattened, or be heat-sealed to be fixed. By doing so, the seal member 1 can be made so that the mesh is less likely to shift and more difficult to extend. As the net-like material, a net having a thickness of 20 μm to 500 μm, more preferably 10 μm to 300 μm can be used. This is because if the thickness of the net is thinner than 20 μm, it becomes difficult to handle, and if it is thicker than 500 μm, it becomes difficult to apply it to a thin device.

In addition to the above configuration, the sealing member 1 can be provided with a protective film 30 on at least one of the exposed surfaces on both the front and back surfaces to cover the exposed surface of the gel molded body 10 to prevent foreign matter and dust from adhering to the sealing member 1. FIG. 4 shows a cross-sectional view when the front surface side protective film 30a and the back surface side protective film 30b are provided on both the front and back surfaces. When the protective film 30 is provided on only one of the front and back surfaces (for example, the front surface side protective film 30a), as shown in FIG. 5, the exposed surface of the gel molded body 10 is covered with the protective film of another sealing member 1. It can be coated by overlapping with the surface of 30 (for example, the surface side protective film 30a). This form is possible, for example, when several sealing members 1 are laminated and provided. If the sealing members 1 in which the protective films 30 are arranged on both sides are laminated and provided, the protective films 30 overlap each other, resulting in an increase in volume or waste of one of the protective films 30. However, such inconvenience can be avoided by providing the protective film 30 by laminating the sealing member 1 provided on only one of the front and back surfaces.

In the sealing member 1 having different adhesiveness between one side and the other side of the front and back surfaces, the protective film 30 on the low adhesive side can be easily peeled off, which facilitates the work. That is, if the low adhesive side is attached when the seal member 1 is attached to the first member 60 (or the second member 70), the protective film 30 on the opposite side is hard to peel off. The risk of accidentally peeling off the protective film 30 on the opposite side is reduced. The protective film 30 on the highly adhesive side is then peeled off to join the first member 60 and the second member 70.

An example of the manufacturing method of the seal member 1 will be described. A raw material composition to be a gel molded product 10 is applied on a resin film or the like as a base material, an elongation inhibitor 20 is placed on the raw material composition, and then a raw material composition to be a gel molded product 10 is further applied thereto. Apply. Then, the seal member 1 is obtained by heat-curing this raw material composition. In the case of the elongation-suppressing body 20 having the opening 21, the elongation-suppressing body 20 is arranged so as to float on the base material, and the raw material composition to be the gel molded body 10 is applied from above and passed through the opening 21. The sealing member 1 can also be manufactured by exuding the raw material composition on the opposite surface.

The seal member 1 thus obtained has the following properties. First, the tensile strength of the seal member 1 in the longitudinal direction is in the range of 1 to 50 MPa, more preferably 1 to 15 MPa, and the tensile fracture elongation is in the range of 0.1 to 50%, more preferably 0.1 to 25%. Can be. As described above, as compared with the tensile fracture strength and the tensile fracture elongation in the case of the gel molded body 10 alone, these values are increased by including the elongation suppressing body 20, the seal member 1 becomes difficult to stretch, and the handleability is improved. You can see that is getting better.

Further, the degree of needle insertion of the seal member 1 can be in the range of 60 to 130, and the type E hardness can be set to almost 0. By setting the needle insertion degree and E hardness of the seal member 1 in the same range as the gel molded body 10, the softness and liquidtightness of the gel molded body 10 should be maintained at the same level as in the case without the elongation inhibitor 20. Is possible.

As shown in FIG. 6B, the seal member 1 is used, for example, sandwiched between the frame-shaped housing 60A (first member 60) and the liquid crystal panel 70A (second member 70) in the liquid crystal display device. The composite seal structure 2 in which the seal member 1 is sandwiched between the first member 60 and the second member 70 is waterproof and dustproof on the inside sandwiched by the seal member 1. In FIG. 6B, the frame-shaped housing 60A (first member 60) has a structure in which the liquid crystal panel 70A (second member 70) is sandwiched between the front surface side housing 60a and the back surface side housing 60b. The body 60a and the back surface side housing 60b are fixed with screws 80. Further, as shown in FIG. 6A, the seal member 1 is used so as to surround the display portion of the liquid crystal panel 70A (second member 70) along the frame-shaped housing 60A (first member 60). Since one seal member 1 has a strip tape shape and not a frame shape, a plurality of seal members 1 are used when sandwiching between the first member 60 and the second member 70. ..

More specifically, as shown in FIG. 7, the gel end portions 11 of the seal member 1 are overlapped with each other, and a plurality of strip tape-shaped seal members 1 are arranged so as to be continuous in the longitudinal direction thereof. Further, at the corners when the seal member 1 is arranged in a frame shape, as shown in FIG. 8, the gel end portions 11 of the two seal members 1 are arranged so as to be orthogonal to each other. At this time, the two sealing members 1, 1 are arranged so that the overlapping portions 11a, 11a of the gel end portions 11, 11 overlap each other. Then, the overlapping connecting portions 11b are formed by arranging the overlapping portions 11a and 11a of the two sealing members 1 and 1 so as to overlap each other. By arranging the plurality of seal members 1 so that the overlapped connecting portion 11b is formed in this way, the seal members 1 can be arranged in a frame shape without any gap.

That is, even if the large liquid crystal panel 70A or the solar panel has a long gap between the first member 60 and the second member 70, a plurality of strip tape-shaped sealing members 1 are used to each other. The gel end portions 11 of the above are arranged so as to overlap each other. Thereby, the seal member 1 can be arranged in a desired portion without a gap. When the width of the gap sandwiched between the first member 60 and the second member 70 is wide, the longitudinal side surfaces of the seal member 1 can be arranged so as to be adjacent to each other as shown in FIG. It is preferable that the length of the gel end portion 11 in the longitudinal direction of the seal member 1 and the length of the seal member 1 in the width direction are the same. If the two directions of the gel end portion 11 have the same length, when the gel end portions 11 of the two seal members 1 are overlapped with each other, even if both seal members 1 are overlapped in the longitudinal direction thereof, they are in orthogonal directions. Even if they are superposed on each other, it becomes difficult to obtain a portion where no superposition occurs. Therefore, the gel end portion 11 of one seal member 1 and the gel end portion 11 of the other seal member 1 can be overlapped with each other in the same shape.

In the seal member 1, since the gel end portion 11 does not include the elongation inhibitor 20, the gel end portions 11 are easily crushed even if they are overlapped with each other, and the seal member 1 is sandwiched between the first member 60 and the second member 70. Can be adhered with. Further, in the seal member 1, since the first member 60 and the second member 70 can be brought into close contact with each other with a small compressive load, there is almost no influence on the load value change due to the inclusion of the elongation suppressing body 20. By using the plurality of seal members 1, it is not necessary to form the frame-shaped housing with a single seal member having a length that goes around the frame-shaped housing, which is preferable in terms of productivity and handleability.

The seal member 1 is used for waterproofing and dustproofing of a liquid crystal display device having a liquid crystal panel 70A, a solar cell device having a solar panel, a device having a glass panel, a housing of a large device, and the like. be able to.

The above-described embodiment is an example of the present invention, and the embodiment can be changed or known techniques can be added or combined without departing from the spirit of the present invention, and these techniques are also within the scope of the present invention. It is included.

1 Sealing member 2 Composite seal structure 10 Gel molded body 10a Front side gel molded body 10b Back side gel molded body 11 Gel end 11a Overlapping part 11b Overlapping connecting part 20 Stretching inhibitor 21 Opening 22 Line 30 Protective film 30a Surface Side protective film 30b Back side protective film 60 First member 60A Frame-shaped housing 60a Front side housing 60b Back side housing 70 Second member 70A Liquid crystal panel 80 Screws

Claims (10)

A tape-shaped seal member that is compressed and placed between the first member and the second member.
It includes a gel-molded body and an elongation-suppressing body provided inside the gel-molded body and suppressing the elongation of the gel-molded body.
A sealing member having gel ends having no elongation inhibitor at both ends of the gel molded body. The sealing member according to claim 1, wherein the elongation-suppressing body has an opening in the thickness direction, and the gel constituting the gel molded body has penetrated into the opening. The seal member according to claim 1 or 2, wherein the adhesiveness of one side and the other side of the front and back surfaces of the gel molded product are different. The seal member according to any one of claims 1 to 3, wherein the length of the gel end portion in the longitudinal direction of the tape shape is substantially the same as the length of the gel end portion in the width direction of the tape shape. The sealing member according to any one of claims 1 to 4, which has a protective film on the surface of the gel molded product. Any of claims 1 to 5, wherein the elongation inhibitor is made of a net-like material, and the line segments forming the lattice are formed along the longitudinal direction and the lateral direction of the tape shape in the net-like material. The seal member according to item 1. A composite seal structure comprising the seal member according to any one of claims 1 to 6, the first member, and the second member. The composite seal structure according to claim 7, wherein the first member is a frame-shaped housing in a liquid crystal display device, and the second member is a liquid crystal panel. The composite seal structure according to claim 7, wherein the first member is a frame-shaped housing in a solar cell device, and the second member is a solar panel. The composite seal structure according to any one of claims 7 to 9, wherein the gel ends of the seal member are arranged so as to overlap each other.

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