A method for creating a composite article using fast heat treating thermoset resin materials for 3D printing articles, including articles of complex geometry. The method includes using vacuum impregnation and subsequent heat treating as post printing processes to further strengthen and enhance the functionality of the article.

Co-cured urethane and vinyl ester, epoxy, or unsaturated polyester gel coats having improved toughness and flexibility compared with conventional polyester gel coats are disclosed. The gel coats, which have 10-50 wt. % urethane content, adhere well to structural layers and can be used in a traditional in-mold process. Co-cured elastomeric coatings comprising from 50 to 95 wt. % of a urethane component and an unsaturated polyester, epoxy, or vinyl ester are also disclosed. Unlike conventional urethane coatings, the elastomeric coatings adhere well to structural layers and can be used in a traditional in-mold process. Castings or structural layers comprising a reinforced thermoset of co-cured urethane and vinyl ester, epoxy, or unsaturated polyester components, including 10-95 wt. % of the urethane component, are also described. The invention includes in-mold processes for making laminates that utilize the gel coats, elastomeric coatings, and/or structural layers. The in-mold process gives flexible, durable, urethane-containing laminates having good interlayer adhesion.

A method of insert molding comprises placing in a first mold a curable rubber composition comprising a reactive species; placing on a surface of the rubber composition a first thermoplastic material in a film or layer comprising a group reactive with the reactive species of the rubber composition; curing the rubber composition in the mold to form a first molded article of cured rubber having a first thermoplastic material layer covalently bonded through reactive of the reactive species and the group; placing the first molded article as an insert into a second mold, the cured rubber contacting an inside surface of the second mold and the thermoplastic layer facing into the second mold cavity; closing the second mold and injecting into the second mold a second thermoplastic material that to form a second molded article comprising the first molded article thermally welded and/or covalently bonded to the second thermoplastic material.

A fastening structure (10) includes: a resin member (14) that contains a resin material, and that has a through-hole (14H) for mounting having a tapered inner wall surface (14T); a member for fastening (16) that is made of metal, and that has a collar portion (16C) that is inserted within the through-hole (14H) for mounting and whose intermediate portion has a tapered outer wall surface (16T) that abuts the tapered inner wall surface (14T), and a flange portion (16F) that projects out along an obverse face of the resin member (14) at an end portion (16Z) at a large-diameter side of the collar portion (16C); and an adhesive (18) that is provided between the obverse face (14A) of the resin member and the flange portion (16F), and that adheres the resin member (14) and the member for fastening (16).

A fastening structure (10) includes: a resin member (14) that contains a resin material, and that has a through-hole (14H) for mounting having a tapered inner wall surface (14T); a member for fastening (16) that is made of metal, and that has a collar portion (16C) that is inserted within the through-hole (14H) for mounting and whose intermediate portion has a tapered outer wall surface (16T) that abuts the tapered inner wall surface (14T), and a flange portion (16F) that projects out along an obverse face of the resin member (14) at an end portion (16Z) at a large-diameter side of the collar portion (16C); and an adhesive (18) that is provided between the obverse face (14A) of the resin member and the flange portion (16F), and that adheres the resin member (14) and the member for fastening (16).

Embodiments of the present invention relate to a multi-layer barrier film, a method for producing same, and a packaging material including same. The multi-layer barrier film has an oxygen permeability of at most 30 cc/m2.Math.atm.Math.day and is composed of at least two different resin layers that are alternately laminated. The two different resin layers include: a first resin layer including an aliphatic polyester-based polymer; and a second resin layer which is resin layer 2a including butenediol vinyl alcohol copolymer (BVOH) or resin layer 2b including ethylene vinyl alcohol (EVOH).

The present invention relates to a heating element composition capable of three-dimensional molding and a film heater formed therefrom. Specifically, the present invention relates to a heating element composition capable of three-dimensional molding and a film heater formed therefrom, wherein the heating element composition has high extensibility and excellent high temperature durability which is in a conflicting relationship with extensibility, so that mechanical damage such as cracks during stretching can be suppressed, has the characteristic of being stably maintained in a molded shape rather than being restored to an original shape after molding, like conventional stretchable materials, can minimize the change rate of resistance when deformed by three-dimensional molding, can be cured at 150 C. or less, and can form a heating element by various printings or coatings so as to be applied to various film heaters.

A bonding structure manufacturing method for manufacturing a bonding structure in which a first member and a second member are bonded is provided with: a step for forming a perforation with an opening in the surface of the first member and forming a protrusion that protrudes into the inner circumferential surface of the perforation; a step for disposing the region of the first member where the perforation is formed adjacent to the second member; and step for filling and curing the second member in the perforation of the first member by irradiating a laser on the region of the first member where the perforation is formed from the second member side.

A bonding structure manufacturing method for manufacturing a bonding structure in which a first member and a second member are bonded is provided with: a step for forming a perforation with an opening in the surface of the first member and forming a protrusion that protrudes into the inner circumferential surface of the perforation; a step for disposing the region of the first member where the perforation is formed adjacent to the second member; and step for filling and curing the second member in the perforation of the first member by irradiating a laser on the region of the first member where the perforation is formed from the second member side.

A pre-buried casing tube uses glass fiber reinforced resin as the raw material to enhance the operation strength of the pre-buried casing tube, extend the service life of the pre-buried casing tube, and reduce maintenance cost of the railway transport system. The pre-buried casing tube includes at least one casing tube body, each casing tube body including at least one retaining element, the retaining elements provided in intervals along one side of the casing tube, each casing tube body disposed adjacently so as to form a passage for a screw, each retaining element provided in the passage for the screw.