The present invention discloses a method of producing an orthodontic transpalatal arch having multiproperties. The present invention provides the transpalatal arch which is easy to prepare without the need of laboratory, cast, and impression. It includes the steps of (a) taking a sterile electrical wire (01) wherein the electrical wire (01) is pushed to follow the palatal contour, opposite to the area of the upper first right and left side molars with the help of a band pusher to record all texture and contour of the palatal area from upper left first molar to upper right first molar, (b) arranging a twistflex (02) inside a plastic tube (04) piece, (c) fixing the plastic tube (04) with twistflex (02) to the wire in a similar shape of the wire recorded for the palatal area by a plurality of hair clamps (05), (d) pouring a resin material inside the plastic tube (04) based on the required properties of the transpalatal arch, (e) setting the resin material along with the twistflex (02), and (f) cutting the plastic tube (04) to release the set resin material with the twistflex (02).

A resin molding method is capable of reducing the use amount of micropellets and obtaining a resin molded article having required characteristics. A resin molding method includes a disposing step of disposing a preliminary molded body laminated and formed in a three-dimensional shape in a molding die, a filling step of heating and melting the preliminary molded body by an electromagnetic wave transmitted through the molding die and filling the molding die with a molten resin material, and a cooling step of cooling and solidifying the molten resin material in the molding die. In the cooling step, a resin molded article integrated so as to eliminate a lamination interface of the preliminary molded body is formed in the molding die.

A resin molding method is capable of reducing the use amount of micropellets and obtaining a resin molded article having required characteristics. A resin molding method includes a disposing step of disposing a preliminary molded body laminated and formed in a three-dimensional shape in a molding die, a filling step of heating and melting the preliminary molded body by an electromagnetic wave transmitted through the molding die and filling the molding die with a molten resin material, and a cooling step of cooling and solidifying the molten resin material in the molding die. In the cooling step, a resin molded article integrated so as to eliminate a lamination interface of the preliminary molded body is formed in the molding die.

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.sup.2.

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.sup.2.

A method for forming a stick for lips includes positioning a mould (2) made of an elastic material, such as silicone, on a first support (11), the said mould comprising a casting cavity (4) endowed with an opening (5). The method further includes centring a cup (3) in the casting cavity (4) opening (5), pouring a melted cosmetic product through the cup (3) and into the casting cavity (4), waiting for the solidification of the melted cosmetic product in the casting cavity (4) so as to form the stick, and extracting the stick (7) from the cavity by gripping the cup (3).

Disclosed are methods for scalable, cost-effective, and rapid production manufacturing and packaging a semi-rigid acoustic coupling medium that can be used for ultrasound diagnostic and treatment systems and techniques. In some aspects, a method includes forming a staged solution by adding together a stock solution comprising a monomer and a block copolymer in deoxygenated water and a primed solution comprising a covalent crosslinking agent and a catalyst; forming a gel-sol by mixing the staged solution with a first network activator solution comprising a monomer activator and a second network activator solution comprising a block copolymer activator; dispensing the gel-sol into a mold; and curing the gel-sol in the mold to produce a semi-rigid acoustic coupling material, where the method is carried under an inert atmosphere.

Disclosed are methods for scalable, cost-effective, and rapid production manufacturing and packaging a semi-rigid acoustic coupling medium that can be used for ultrasound diagnostic and treatment systems and techniques. In some aspects, a method includes forming a staged solution by adding together a stock solution comprising a monomer and a block copolymer in deoxygenated water and a primed solution comprising a covalent crosslinking agent and a catalyst; forming a gel-sol by mixing the staged solution with a first network activator solution comprising a monomer activator and a second network activator solution comprising a block copolymer activator; dispensing the gel-sol into a mold; and curing the gel-sol in the mold to produce a semi-rigid acoustic coupling material, where the method is carried under an inert atmosphere.

An example system for molding a photocurable material into a planar object includes a first mold structure having a first mold surface, a second mold structure having a second mold surface, and one or more protrusions disposed along at least one of the first mold surface or the second mold surface. During operation, the system is configured to position the first and second mold structures such that the first and second mold surfaces face each other with the one or more protrusions contacting the opposite mold surface, and a volume having a total thickness variation (TTV) of 500 nm or less is defined between the first and second mold surfaces. The system is further configured to receive the photocurable material in the volume, and direct radiation at the one or more wavelengths into the volume.

An example system for molding a photocurable material into a planar object includes a first mold structure having a first mold surface, a second mold structure having a second mold surface, and one or more protrusions disposed along at least one of the first mold surface or the second mold surface. During operation, the system is configured to position the first and second mold structures such that the first and second mold surfaces face each other with the one or more protrusions contacting the opposite mold surface, and a volume having a total thickness variation (TTV) of 500 nm or less is defined between the first and second mold surfaces. The system is further configured to receive the photocurable material in the volume, and direct radiation at the one or more wavelengths into the volume.