As described above, one or more aspects of the present disclosure provide articles having structural color, and methods of making articles having structural color.

A layered body includes a first layer with a plurality of first composite sheets, and a second layer with a plurality of second composite sheets in a state of contacting the first layer. The first composite sheets are disposed along an arrangement direction shaped as a curved line so that an end in a first longitudinal direction of one first composite sheet and an end in the first longitudinal direction of an adjacent first composite sheet are close to each other without overlapping in the thickness direction, and so that the first longitudinal directions of the sheets intersect each other. The second composite sheets are disposed along the arrangement direction so that an end in a second longitudinal direction of one second composite sheet and an end in the second longitudinal direction of an adjacent second composite sheet are close to each other without overlapping in the thickness direction.

As described above, one or more aspects of the present disclosure provide articles having structural color, and methods of making articles having structural color.

A fiber reinforced metal composite having a metal layer and a fiber layer which are arranged in a stack, and adjacent layers are fixed by bonding; the composite has a two-layered or three-layered structure, wherein one layer is closely adhered to another layer and the thickness of the layer is from 0.6 mm˜0.9 mm. Such structure changes the structure of the existing fiber metal composite characterized by generally having more than three layers, and greatly reduces the thickness of the composite while maintaining good mechanical properties. Also disclosed is an application of fiber reinforced metal composite in the field of luggage case manufacturing, providing two preparation methods for providing fiber reinforced metal case shell with simple and available operations.

A composite film including stacking: a first fiber layer, a metal layer with multiple holes, and a second fiber layer, a stitching structure is arranged along the horizontal direction of the first fiber layer and the second fiber layer within areas of the holes of the metal layer; and the stitching structure in each of the holes is connected, but the stitching structures in different holes are not mutually connected. The stitching structures of this invention pass through the first fiber layer and the second fiber layer, fortifying the stress resistant abilities along the radial direction of the composite film, and thus avoid the peeling off of the stacked structure from the radial direction, and with the independent stitching structure formed independently in each of the holes of the metal layer, the stitching structures would not interact with each other, so that even one of the stitching structure is broken, other stitching structures would not be affected, effectively increasing the durability of the product of this invention.

[Front page view] FIG. 1.

[Brief description of the symbols of front page view] 10 composite film 11 first fiber layer 12 metal layer 121 hole 13 second fiber layer 14 stitching structure

The invention relates to a system and to a method for producing a rotor-blade spar cap with pultruded rods made of a fiber-reinforced material. According to the invention, the system includes at least one retaining apparatus for rotatably mounting at least one rod-layer roll with a rolled-up layer of pultruded rods arranged one beside the other, and a laminating mold for receiving layers of pultruded rods. The system further includes at least one guiding apparatus and additionally at least one trimming apparatus. The guiding apparatus is designed to guide onto the laminating mold a layer of pultruded rods which has been unrolled from a rod-layer roll. And, the trimming apparatus, for trimming the layers of pultruded rods, has a sawing apparatus and/or a milling apparatus.

A thermoplastic product includes a fabric-based reinforcing sheet and a polymerized thermoplastic material. The fabric-based reinforcing sheet is wound about a mandrel to form a plurality of layers having a cross-sectional shape that corresponds to the mandrel. The fabric-based reinforcing sheet includes a plurality of fiber bundles, which may have a bidirectional orientation or configuration. A polymerized thermoplastic material is disposed within each layer of the fabric-based reinforcing sheet. The polymerized thermoplastic material bonds each layer of the fabric-based reinforcing sheet to an adjacent layer.

In an embodiment, an energy-absorbing device can comprise: a polymer reinforcement structure, wherein the polymer reinforcement structure comprises a polymer matrix and chopped fibers; and a shell comprising 2 walls extending from a back and forming a shell channel, wherein the shell comprises continuous fibers and a resin matrix; wherein the polymer reinforcement structure is located in the shell channel.

A reinforcement sheet has a composite layer including fibres and a polymer A and a coating layer including polymer B, each polymer having at least 65 mol % of a repeat unit of formula:

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wherein for each polymer A and B, t1, and w1 independently represent 0 or 1 and v1 represents 0, 1 or 2. A method of forming the reinforcement sheet is also disclosed, in addition to a method for forming an article comprising a laminate of the reinforcement sheets and the article comprising such a laminate. The repeat unit may be ether-ether-ketone.

The invention relates to a method of making an acoustic product and a novel acoustic product, wherein the acoustic product is made by adhering a facing to a first major surface of an acoustic insulation element by the use of an adhesive and curing the adhesive. The adhesive is an aqueous adhesive composition which comprises a component (i) in form of one or more oxidized lignins; a component (ii) in form of one or more cross-linkers; a component (iii) in form of one or more plasticizers.