Sk Microworks Co., Ltd.

Skc Co., Ltd.

Sk Microworks Solutions Co., Ltd.

Skc Microworks Co., Ltd.

Dae Seong Oh

Jin Woo Lee

Sunhwan Kim

Han Jun Kim

Jung Hee Ki

Dong Jin Lim

Sang Hun Choi

Dawoo Jeong

Heung Sik Kim

Sun Hwan Kim

Yun Hee Seo

Cheol Ho Kim

Kyungeun Oh

Gun Uk Kim

Joo Young Jung

Kyu-Hun Kim

Kyung Won Choi

Yun-Hee Seo

Embodiments relate to a polyamide-imide film that has a clean appearance and transparency and is excellent in antiblocking properties, a process for preparing the same, and a display front panel and a display device comprising the same. The polyamide-imide film comprises a polyamide-imide polymer formed by polymerizing a diamine compound, a dianhydride compound, and a dicarbonyl compound; and a filler, wherein the dicarbonyl compound comprises a first dicarbonyl compound and a second dicarbonyl compound, the first dicarbonyl compound and the second dicarbonyl compound are structural isomers to each other, and the FH value of Equation 1 is 0.5 or less.

Polyamide-imide film, preparation method thereof, and display front plate and display device comprising same

The embodiments relate to a polyamide-based film that is excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-based film, which comprises a polyamide-based polymer and has a plasticity characteristic value represented by the following equation of 18.45 to 19.97%, a process for preparing the same, and a cover window and a display device comprising the same: Plasticity characteristic value (%)=(100−nIT)/(HIT/HM). In this equation, nIT, HIT, and HM are measured according to the ISO 14577 standard with a nanoindenter, nIT is the elasticity (%), HIT is the indentation hardness (N/mm), and HM is the composite hardness (N/mm).

Polyamide-based film, preparation method thereof, cover window and display device comprising the same

The embodiments provide a polyamide-based film, which comprises a polyamide-based polymer and has a light resistance index of 0.660 GPa-1 or less as represented by the following Equation 1, whereby it has excellent mechanical properties, optical properties, and light resistance. [Equation 1] Light resistance index=ΔYI/Y. In Equation 1, Y is the modulus of the film, and ΔYI is the rate of change in yellow index (YI) of the film before and after a light resistance test in which UV rays are irradiated to the film at 60° C., the UV irradiation is stopped, and water is sprayed at 50° C.

Polyamide-based film, method of preparing polyamide-based film, cover window and display device comprising the same

Embodiments relate to a base film that is colorless, transparent, and excellent in mechanical properties and optical properties, particularly with low moisture permeability, a process for preparing the same, and a cover window and a display device comprising the same. The cover window comprises a base film comprising a polyamide-based polymer and having a moisture permeability of 300 g/m·day or less; and a functional layer.

Base film, preparation method thereof, and cover window and display device comprising same

The embodiments relate to a polyamide-imide film excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-imide film, which comprises a polyamide-imide polymer and has a reduced modulus of a top surface measured by the nanoindentation method according to the ISO 14577-2 standard of 5.6 GPa or more and a haze of 1% or less, a process for preparing the same, and a cover window and a display device comprising the same.

Polyamide-imide film, preparation method thereof, cover window and display device comprising the same

The embodiments relate to a polyamide-based film excellent in optical properties such as transmittance, haze, and yellow index and mechanical properties such as modulus and thickness uniformity, to a process for preparing the same, and to a cover window and a display device comprising the same. The polyamide-based film comprises a polyamide-based polymer and has an XRD pattern comprising a first peak whose highest point is located in a section where 2θ is 14° to 16°.

Polyamide-based film, preparation method thereof, and cover window and display device comprising same

An embodiment can provide a polyamide-imide film and a method for producing same, the film comprising a polyamide-imide polymer formed by polymerizing an aromatic diamine compound, an aromatic dianhydride compound and a dicarbonyl compound, wherein, in an XRD graph with a section in which 2θ=8° to 32° as a baseline, the film shows a peak area of 50% or above around 2θ=23° with respect to a peak area seen around 2θ=15°.

Polyamide-imide film and method for producing same

The embodiments relate to a polyamide-based composite film with excellent curl characteristics, mechanical characteristics, and optical characteristics. The polyamide-based composite film comprises a base film comprising a polyamide-based polymer and a functional layer disposed on the base film, wherein when the polyamide-based composite film is placed on a surface light source such that the base film is in contact with the surface light source, light is irradiated from the surface light source, and the luminance value measured in the normal direction of the surface light source is 100%, the luminance value measured in the direction of 50° from the normal direction of the surface light source is 25% or more.

Polyamide-based composite film and display device comprising same

Embodiments relate to a polymer film. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has a haze (HZ) before autoclave treatment of 3% or less and a ΔHZrepresented by Equation 1a of 500% or less.

Polymer film

Embodiments relate to a polyamide-imide film that maintains its mechanical properties at least at a certain level under the conditions of high temperatures and low temperatures and is excellent in transparency and folding characteristics, a process for preparing the same, and a cover window comprising the same. The polyamide-imide film comprises a polyamide-imide polymer and has an MOvalue defined in Equation 1a of 75% or more.

Polyamide-imide film, preparation method thereof, and cover window comprising same

The embodiments relate to a polyamide-based composite film that not only has excellent curl characteristics, mechanical properties, and optical properties, but also exhibits a privacy protection effect at a wide angle of view and glossiness characteristics similar to those glass at a main angle of view, and to a display device comprising the same. There are provided a polyamide-based composite film that comprises a base film comprising a polyamide-based polymer; and a functional layer disposed on the base film, wherein a glossiness control value according to Equation 1 is 0 or more, and a displace device comprising the same.

Embodiments relate to a polyamide-based film that is colorless and transparent, is excellent in mechanical properties and optical properties, has a wide angle of view by securing at least a certain level of luminance at various angles, and, in particular, has gloss characteristics similar to those of glass, a process for preparing the same, and a cover window comprising the same. The polyamide-based film comprises a polyamide-based polymer, wherein when the polyamide-based film is placed on a surface light source, light is irradiated from the surface light source, and the luminance value (L) measured in the normal direction of the surface light source is 100%, the luminance value (L) measured in the direction of 50&#xb0; from the normal direction of the surface light source is 25% or more.

Polyamide-based film, preparation method thereof, and cover window comprising same

Embodiments relate to a polymer film that is excellent in folding characteristics and transparency and maintains excellent mechanical properties even after repeated elongation and shrinkage in the elastic region, a process for preparing the same, and a front panel and a display device comprising the same. The polymer film comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin and has an MORof Equation A of 2% or less.

Polymer film and preparation method thereof

The embodiments relate to a polyamide-based film excellent in optical properties, mechanical properties, and processing suitability and to a cover window and a display device comprising the same. The polyamide-based film comprises a polyamide-base polymer, wherein a dipolar solvent compatibility represented by the following equation is 18.5 to 24: Dipolar solvent compatibility=&#x221a;{square root over ((&#x3c3;&#x2212;&#x3b4;1)+(&#x3c3;&#x2212;&#x3b4;1))}. In the equation, &#x3c3;is a value of a dispersible component in surface energy of the polyamide-based film, &#x3c3;is a value of a polar component in surface energy of the polyamide-based film, &#x3b4;1is a value of a dispersible component in Hansen solubility parameter of the dipolar solvent, and &#x3b4;1a value of a dipolar component in Hansen solubility parameter of the dipolar solvent.

Polyamide-based film, and cover window and display device comprising same

Embodiments relate to a polyamide-imide film that secures excellent tensile toughness and elastic restoring force, and a process for preparing the same. The polyamide-imide film comprises a polyamide-imide polymer formed by polymerizing a diamine compound, a dianhydride compound, and a dicarbonyl compound, wherein the area value up to the yield point derived by the 0.2% off-set method on a stress-strain curve of the polyamide-imide film as measured using a universal testing machine (UTM) is 80 to 150 J/m.

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Seoul, South Korea

Dae Seong Oh