Abstract: The polyamide-imide copolymer according to the present disclosure makes it possible to provide a polyamide-imide film that is excellent in both thermal stability and mechanical properties, and is capable of realizing anisotropy.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based block copolymer film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film having low haze and yellow index value while exhibiting excellent transparency.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based block copolymer film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film having low haze and yellow index value while exhibiting excellent transparency.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film having a large molecular weight and exhibiting colorless and transparent properties.

Abstract: The polyamide-imide copolymer according to the present disclosure makes it possible to provide a polyamide-imide film that is excellent in both thermal stability and mechanical properties, and is capable of realizing anisotropy.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film exhibiting excellent mechanical properties while having a high molecular weight, and being colorless and transparent.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film having a large molecular weight and exhibiting colorless and transparent properties.

Abstract: The present disclosure relates to a polyimide-based block copolymer film. The polyimide-based block copolymer film according to the present disclosure exhibits excellent an ultraviolet shielding property to be suitably used for substrates for displays, protective films for displays, touch panels, and the like.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film exhibiting excellent mechanical properties while being colorless and transparent. The polyimide-based film may be used as a cover film of various flexible or foldable devices.

Abstract: The present disclosure relates to a polyimide-based copolymer and a polyimide-based film including the same. The polyimide-based copolymer according to the present disclosure can provide a polyimide-based film exhibiting low absorbency while having excellent heat resistance and mechanical properties.

Abstract: The present disclosure relates to a polyimide-based block copolymer film. The polyimide-based block copolymer film according to the present disclosure exhibits excellent an ultraviolet shielding property to be suitably used for substrates for displays, protective films for displays, touch panels, and the like.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film exhibiting excellent mechanical properties while being colorless and transparent. The polyimide-based film may be used as a cover film of various flexible or foldable devices.

Abstract: The present disclosure relates to a polyimide-based block copolymer and a polyimide-based film including the same. The polyimide-based block copolymer according to the present disclosure makes it possible to provide a polyimide-based film exhibiting excellent mechanical properties while having a high molecular weight, and being colorless and transparent.

Abstract: The present invention relates to an insulating wire and, more particularly, to an insulating wire having partial discharge resistance that exhibits excellent partial discharge resistance and high partial discharge inception voltage and also excellences in the adhesion between the conductor and the insulation layer and the flexibility of the insulation layer, which insulating wire can be prepared by a simple process at a low production cost.

Abstract: Disclosed is an insulating winding wire having corona resistance, including a conductor and an insulation coating. The insulation coating includes a basal layer applied to cover the conductor and an outer layer applied to cover the basal layer. The basal layer includes at least one resin selected from the group consisting of polyvinylformal resin, polyurethane resin, heat-resistant polyurethane resin, polyester resin, polyester imide resin, polyamide imide resin, polyimide resin and polyamide resin. The basal layer includes 5 to 15 parts by weight of inorganic insulation particles and 1 to 3 parts by weight of an adhesive agent with respect to 100 parts by weight of the resin and the basal layer has a thickness 70 to 80% of the thickness of the insulation coating.

Abstract: The present invention relates to an insulating winding wire and, more particularly, to an insulating winding wire having corona resistance that has an insulation coating excellent not only in corona resistance but also in adhesion and flexibility.

Abstract: The present invention relates to an insulating wire and, more particularly, to an insulating wire having partial discharge resistance that exhibits excellent partial discharge resistance and high partial discharge inception voltage and also excellences in the adhesion between the conductor and the insulation layer and the flexibility of the insulation layer, which insulating wire can be prepared by a simple process at a low production cost.

Abstract: Disclosed is an insulating varnish composition including polyamideimide resin and 1 to 40 parts by weight of surface-treated silica in a sol state per 100 parts by weight of the polyamideimide resin. An insulated layer formed using the insulating varnish composition may have excellent corona discharge resistance, thereby preventing the insulation breakdown.

Abstract: Disclosed is an insulating varnish composition including an organo silica sol containing a silica covered with a dispersant in a solvent containing N-methyl-2-pyrrolidone (NMP) as a main component and a polyamidimide resin dispersed in a solvent containing NMP as a main component. An insulated layer formed from the insulating varnish composition containing inorganic insulating particles of silica uniformly dispersed therein may have excellent corona discharge resistance, thereby preventing the insulation breakdown.