A multilayer protective covering can protect a surface from lightning strikes. The covering includes a bottom conductive layer affixed to the surface and having a first opening that is aligned with a grounding connection so that the grounding connection is exposed through first opening and not in contact with the bottom conductive layer. The covering also includes a dielectric layer affixed to the bottom conductive layer and having second opening aligned with the grounding connection so that the grounding connection is exposed through second opening and not in contact with the dielectric layer. The covering additionally includes a top conductive layer affixed to the dielectric layer and covering the grounding connection. The top conductive layer directs electrical current from a lightning strike on the surface to the grounding connection.

The present disclosure provides a transparent elastic composite film, which includes a first film layer; a thermoplastic polyurethane layer; and a second film layer; wherein the first film layer and the second film layer have a crosslinked network structure; the first film layer includes acrylic resin and aliphatic polyisocyanate, wherein the acrylic resin includes hydroxyl-containing acrylic resin, and a weight ratio of the acrylic resin to the aliphatic polyisocyanate is 1/1 to 1/1.2, and a weight ratio of the hydroxyl-containing acrylic resin to the acrylic resin is 0.1/1 to 0.18/1.

One embodiment of the present disclosure provides a resin layer 10 used for an image displaying device, wherein a shear storage elastic modulus G′ of the resin layer 10, at 25° C. and frequency range of 500 Hz or more and 1000 Hz or less, is 30 MPa or more and 200 MPa or less, and a glass transition temperature of the resin layer 10 is 50° C. or more.

A laminate includes a glass base, a silicone resin layer, and a polyimide resin layer. The polyimide resin layer includes a fluorine-atom-containing polyimide. When examined by infrared absorption, the polyimide resin layer gives a spectrum in which a ratio of an area of a peak appearing at 3,150 cm.sup.-1 to 3,750 cm.sup.-1 to an area of a peak appearing at 1,650 cm.sup.-1 to 1,750 cm.sup.-1 is 0.9 or less.

A flexible display module and a manufacturing method thereof are provided. The flexible display module includes a substrate, a second glue layer, and a display panel disposed in a stack. Wherein, the display panel includes a bending area, and a first groove is defined in a third area of the substrate corresponding to the bending area and filled with a first glue layer. More deformation can be provided and bending stresses can be reduced by the first glue layer and the second glue layer, thereby improving bending resistance of the flexible display module.

A method for manufacturing a thick polyimide film includes providing a first and second laminated structures. The first and second laminated structures are heated, and the heated first and second laminated structures are wound together to form a third laminated structure. The first polyamic acid gel film of the heated first laminated structure and the second polyamic acid gel film of the heated second laminated structure are overlapped and bonded together to form a third polyamic acid gel film. Two third laminated structures are wound together to form a fourth polyamic acid gel film. A dehydration ring-closure imidization reaction is applied to the fourth polyamic acid gel film by heating to obtain the thick polyimide film. A thick polyimide film manufactured by the method is also disclosed.

A flexible display panel includes: a flexible substrate, a thin film transistor layer, a light-emitting layer, an encapsulation layer located on one side of the flexible substrate successively, the flexible display panel includes a bending area where a neutral layer adjusting layer is located on the side of the flexible substrate away from the light-emitting layer; when the bending area is a first bending area, the neutral layer adjusting layer adjusts position of neutral layer in the first bending area to the encapsulation layer; when the bending area is a second bending area, the neutral layer adjusting layer adjusts position of neutral layer in the second bending area to the thin film transistor layer; the first bending area is an area where the flexible substrate is bent away from the light-emitting layer, and the second bending area is an area where the flexible substrate is bent toward the light-emitting layer.

A foldable cover article has a total thickness t≤300 μm, which is bendable to a minimum bending radius r≤20 mm without breakage and a pencil hardness HR≥HB. The foldable cover article includes a glass or glass-ceramic substrate with a thickness 5 μm≤t1≤150 μm and a polymer layer and/or a hard material coating with a total thickness 5 μm≤t2≤150 μm. For each 20 mm width of the foldable cover article, when the foldable cover article is broken upon bending along the direction perpendicular to the width, a number of projects with a longest linear extension L≥5 mm is less than 10 and/or a number of projects with a longest linear extension L<5 mm is less than 50.

The present invention provides a flexible organic light emitting diode (OLED) module stacked structure and a manufacturing method of the flexible OLED module stacked structure. The structure includes a substrate, a thin film transistor (TFT) array layer, an OLED element layer, a thin film encapsulation layer, a cover plate, and a foam layer. The thin film encapsulation layer is disposed on the OLED element layer, and entirely covers the OLED element layer. The foam layer is disposed on one side of the substrate away from the TFT array layer. The protective film in place of a back plate is used and removed, and the foam layer is used to provide a support and buffering function, so an overall thickness is reduced, and less ash is produced.

A multilayer film including alternately-laminated fluororesin layers and polyimide resin layers, wherein a total number of the fluororesin layers and the polyimide resin layers is five or more, a ratio of the total thickness of the fluororesin layers to the thickness of the whole multilayer film is 50% or more, and at least one of the outermost layers of the multilayer film is a fluororesin layer.