There is provided a method of manufacturing a composite structure of an aircraft. The composite structure includes a skin and a reinforcing material. The method includes, by stacking unhardened composite sheets on a region of a jig adjacent to a holding portion to hold the reinforcing material, forming a skin inner layer including a retainer to retain two end portions of a flange of the reinforcing material in a width direction of the flange. The method includes installing the reinforcing material at the holding portion of the jig so that the two end portions abut upon the retainer. The method includes, by stacking unhardened composite sheets on an outer surface of the flange and on an outer surface of the skin inner layer, forming a skin outer layer. The method includes hardening the skin inner layer and the skin outer layer.

An apparatus for the thermo-forming and/or thermo-adhesive bonding of semi-finished products comprises: an oven (6) having walls (8, 9, 11, 12) delimiting a chamber (13) configured for housing at least one semi-finished product (4); devices (15, 16, 20) for generating a flow of heated fluid; wherein at least one of the walls (11) has a plurality of openings (19) in fluid communication with the devices (15, 16, 20). Baffles (23) and/or closing elements (24) are mounted near at least some of the openings (19). The baffles (23) are configured to divert the heated fluid leaving the openings (19). The closing elements (24) are configured to obstruct some of the openings (19). The baffles (23) and/or the closing elements (24) are movable with respect to the walls (11) and/or they are replaceable, in order to change conditions of the flow of heated fluid in the chamber (13).

The present invention aims to provide a polyvinyl acetal resin composition that is moldable by an extrusion method and capable of exhibiting excellent heat resistance after molding, an adhesive sheet containing the polyvinyl acetal resin composition, and a method for producing the adhesive sheet. The present invention relates to a polyvinyl acetal resin composition including: a polyvinyl acetal; a reactive diluent; and a photopolymerization initiator, the polyvinyl acetal resin composition having a storage modulus G′ at 200° C. before irradiation with light of 8×10.sup.4 Pa or lower and a storage modulus G′ at 200° C. after irradiation with light of 8×10.sup.3 Pa or higher, with the storage modulus G′ at 200° C. after irradiation with light being higher than the storage modulus G′ at 200° C. before irradiation with light.

A multilayer thermoformable film to protect the surface of a workpiece includes an underlayer having first and second faces. The underlayer is made from an adhesive material configured to adhere to the surface of the workpiece by the first face. At least one layer of polymer material is attached to the second face of the adhesive underlayer. The layer of polymer material is resistant to erosion by solid particles and to erosion by liquid particles. It is formed from a polymer material chosen from a polyurethane, a polyether ether ketone and a polyethylene having a very high molecular weight, with a Shore D hardness of between 50 and 65 D. A method of surface protection of the workpiece includes thermoforming the film in a shape adapted to match the shape of at least a portion of the workpiece and applying the film thermoformed onto the surface of the workpiece.

Disclosed is a composition that comprises or is produced from a first ethylene α-olefin copolymer, a modified first ethylene α-olefin copolymer, and a second ethylene α-olefin copolymer or propylene α-olefin copolymer. Also disclosed is a multilayer film or sheet structure containing at least one barrier layer; at least one predominantly propylene-based layer, at least one predominantly ethylene-based layer, or both; and at least one adhesive layer produced from the composition. Further disclosed is a produced for producing a multilayer structure using the composition as adhesive layer.

A melter for preparing a molten medium, in particular for preparing a molten adhesive, has a melting tank that has a melting chamber for receiving and melting a medium to be melted. The melter has a heating device for heating the melting chamber. The melting chamber has an upper chamber section and a lower chamber section. The melting tank has a dispensing opening that can be fluidly connected to a delivery device for delivering the molten medium. The melting tank further has a drain opening. The dispensing opening and the drain opening open into the lower chamber section. The melter further has a closure body for closing the drain opening. In a closed position, the closure body closes the drain opening and an end section of the closure body projects into the lower chamber section.

An intermediate laminate having a first adhesive layer and a first cross-linked cured resin layer laminated directly with no other layer interposed therebetween, the first adhesive layer having a polyvinyl acetal resin and/or an ionomer resin.

The present disclosure comprises a multi-layer tube including an inner layer comprising a thermoplastic material, an intermediate layer comprising high density polyethylene (HDPE); and an outer layer comprising a thermoplastic material. The HDPE intermediate layer is sandwiched between the outer layer and the inner layer of a thermoplastic material. The thermoplastic material is selected to facilitate extrusion and provide a low cost, robust multi-layer tube for any low temperature glycol cooling system applications.

This invention relates to a multilayered patch, comprising: a first layer, and a pressure-sensitive adhesive layer comprising a mixture of: a styrene-based triblock copolymer, a styrene-based diblock copolymer, and at least one hydrocarbon resin selected from the group of aromatic modified aliphatic hydrocarbon resins, partially hydrogenated resins, and fully hydrogenated resins; wherein the first layer comprises a metal or a metal alloy, or wherein the first layer comprises a polymer and has a strain at break of at least 10%, the strain at break being measured according to ASTM D638 or ASTM D882. The multilayered patch exhibits favourable properties as sealing material for vehicle body holes against ingression of noise, moisture and/or dirt. Also described are methods of sealing and methods of manufacturing the multilayered patch.

A three-dimensional object comprises substantially planar or flat substrate layers that are folded and stacked in a predetermined order and infiltrated by a hardened material. The object is fabricated by positioning powder on all or part of multiple substrate layers. On each layer, the powder is selectively deposited in a pattern that corresponds to tiles that each have a slice of the object. For each slice, powder is deposited in positions that correspond to positions in the slice where the object exists, and not deposited where the object does not exist. The tiles of each substrate layer are folded and aligned in a predetermined order. Multiple folded substrate layers mat be combined into a single stack. The powder is transformed into a substance that flows and subsequently hardens into the hardened material in a spatial pattern that infiltrates positive regions, and does not infiltrate negative regions, in the substrate layers.