A method of preparing an aerogel composite, which includes a wetting pretreatment step for suppressing the generation of air bubbles in a fibrous material such as a mat, and a step of impregnating the fibrous material with a precursor by injecting the precursor in a vessel under a reduced pressure. The method provides a high quality, high insulation aerogel-impregnated composite without air bubbles.

A method for producing a semi-finished honeycomb-core product for producing a sandwich component, a method for producing a sandwich component, a semi-finished honeycomb-core product, a sandwich component, and the use thereof as a component of a motor vehicle.

Provided is a device of bonding substrates together, which includes a first holding unit configured to vacuum-draw a first substrate and to adsorptively hold the first substrate on a lower surface thereof and a second holding unit installed below the first holding unit and configured to vacuum-draw a second substrate and to adsorptively hold the second substrate on an upper surface thereof. The second holding unit includes: a body portion configured to vacuum-draw the entire surface of the second substrate; a plurality of pins installed on the body portion and configured to make contact with a rear surface of the second substrate; and a support portion installed on the body portion at the outer side of the pins, the support portion having a reduced contact area over which the support portion makes contact with an outer peripheral portion of the second substrate.

A proposed film (e.g., clear film, protective film, urethane film, polyurethane film, thermoplastic urethane film, ceramic film, or a combination of two or more films, or the like) and method of installing the proposed film will enhance and protect any polycarbonate or acrylic surfaces. The proposed film and proposed method for installing the proposed film is designed to solve the issues inherent in the soft polycarbonate and acrylic materials or substrate. For example, polycarbonate and acrylic substrates with a hardness level of 3-4 do not have the same scratch resistance or self-healing properties as the proposed film's 9 hardness level. By applying the proposed film to existing polycarbonate or acrylic, we get all the benefits of the proposed film, enhancing the substrate to which it is applied.

An embossing apparatus for producing a fluffy multilayer web product includes a first embossing assembly that forms a first embossed pattern on a first web product and a second embossing assembly that forms a second embossed pattern on a second web product. The first web product is humidified by a first humidifying device before being conveyed to the first web product embossing assembly, and the second web product is humidified by a second humidifying device before being conveyed to the second web product embossing assembly. The first web product that is formed with the first embossed pattern is applied with glue and then conveyed, together with the second web product that is formed with the second embossed pattern, to pass between a laminating roller and the first steel embossing roller to be then out fed along an out-feeding path.