In a method for producing a fiber-reinforced resin molded body (10) by heat-compressing fiber substrates (11A to 11D) together with a thermosetting resin (15) so that the thermosetting resin (15) is impregnated into the fiber substrates (11A to 11D) and cured, a thermosetting resin powder (15A) is disposed in contact with at least one surface of the fiber substrates (11A to 11D), the fiber substrates (11A to 11D) are heat-compressed together with the thermosetting resin powder (15A) by a mold (30) so that the thermosetting resin powder (15A) is melted, impregnated into the fiber substrates (11A to 11D), and cured. Also disclosed is a fiber-reinforced resin molded body as well as a vehicle or airframe including a fiber-reinforced resin molded body.

The invention relates to a composition intended for coating polymer films, making it possible to improve the adhesion between the film and a final coating, and to confer good barrier properties on the coated film. The coating composition comprises at least one acrylic and/or methacrylic polymer which has a gel content of at least 50% by weight, relative to the total weight of acrylic and/or methacryclic polymer, at least one crosslinking agent and at least one polyester comprising sulphonyloxy groups, which is water-soluble or water-dispersible.

This application describes methods of forming an object. The methods described include flowing a polyhemiaminal (PHA), polyhexhydrotriazine (PHT), or polyoctatriazacane (POTA) precursor mixture to a nozzle of a 3D printer, heating the PHA, PHT, or POTA precursor to a temperature of at least 50 C., dispensing the PHA, PHT, or POTA precursor in a pattern; and, hardening the PHA, PHT, or POTA precursor into a polymer. The PHA and PHT polymers are formed by reacting a primary diamine with a formaldehyde-type reagent. The POTA polymer is formed by reacting a primary diamine with a formaldehyde-type reagent and formic acid. The objects formed using the methods described herein may be made of a single polymer, a single polymer type using multiple diamine monomers, or a mixture of PHA, PHT, and/or POTA polymers with different desired physical properties.

In a method for producing a fiber-reinforced resin molded body (10) by heat-compressing fiber substrates (11A to 11D) together with a thermosetting resin (15) so that the thermosetting resin (15) is impregnated into the fiber substrates (11A to 11D) and cured, a thermosetting resin powder (15A) is disposed in contact with at least one surface of the fiber substrates (11A to 11D), the fiber substrates (11A to 11D) are heat-compressed together with the thermosetting resin powder (15A) by a mold (30) so that the thermosetting resin powder (15A) is melted, impregnated into the fiber substrates (11A to 11D), and cured. Also disclosed is a fiber-reinforced resin molded body as well as a vehicle or airframe including a fiber-reinforced resin molded body.

A melamine utensil made from melamine composite material and a method of manufacturing the same are provided. Stir and mix 60-70 weight percentage (wt %) of a primary powder-like melamine material, 20-30 wt % of shards of a secondary melamine material, and 5-15 wt % of melamine resin glazing powder, or 49-59 wt % of the primary powder-like melamine material, 16-26 wt % of shards of the secondary melamine material, 12-22 wt % of pulp, and 6-10 wt % of the melamine resin glazing powder evenly to form a composite material. The composite material is pre-heated and mounted into a mold to produce the melamine utensil by hot pressing. The shards of the secondary melamine material with different shapes, sizes or colors are formed by crushing of the hot-pressed secondary melamine material. During the hot-pressing, the primary melamine material and the melamine resin glazing powder are melted and attached to the secondary melamine material.