A folding structure of a corrugated cardboard including a first liner, a second liner, and a core interposed between the first liner and the second liner. A decorative sheet is attached to an outer surface of the first liner, the corrugated cardboard is formed with a cutout portion. A recessed groove or a cut line portion disposed along an extending direction of the cutout portion is provided on an opposite side of a surface of the first liner where the decorative sheet is provided, the recessed groove or the cut line portion is provided at a bottom portion of the cutout portion including the first oblique side portion and the second oblique side portion.

A fiber preform includes first fiber tows located in a first area on a base, a second fiber tow located in a second area on the base other than the first area and stitched onto the base with a water-insoluble fixing thread, and a fixer located across the first fiber tows to fix parts of the first fiber tows to the base. The fixer is a third fiber tow stitched onto the base with a water-insoluble fixing thread, or the fixer is a glue or an elastic adhesive. The first fiber tows are displaceable relative to one another. The first area is displaceable relative to the second area.

A bonded article includes at least a first adherend, a second adherend, and an adhesive material interposed between the first adherend and the second adherend, in which the adhesive material includes at least a first adhesive resin layer, a second adhesive resin layer, and a base material layer interposed between the first adhesive resin layer and the second adhesive resin layer, the first adhesive resin layer is in contact with the first adherend, the second adhesive resin layer is in contact with the second adherend, a peel strength of the first adherend measured on the basis of JIS L1086 (2020) 7.10 is lower than a peel strength of the second adherend, and a surface area of the second adhesive resin layer is smaller than a surface area of the first adhesive resin layer.

A surface covering element can have a rigid core. The rigid core can include at least one densified fiber batt. The rigid core can have a first surface and an opposed second surface that are spaced apart along a first axis. The rigid core can have a plurality of edges that define a periphery of the rigid core. The plurality of edges can include at least a first edge and an opposed second edge that are spaced along a second axis that is perpendicular to the first axis. The first edge can include a tongue, and the second edge can define a groove.

A tube including: at least one inner fluoropolymer layer, where the at least one inner fluoropolymer layer includes a first fluoropolymer having a melting temperature of about 140 C. to 200 C., and at least one outer fluoropolymer layer overlying the inner fluoropolymer layer, the at least one outer fluoropolymer layer having an inner surface and an outer surface where the outer fluoropolymer layer includes a second fluoropolymer having a heat shrink temperature of less than 250 C., where the tube has a working temperature up to 180 C., where the at least one outer fluoropolymer layer has a shrink ratio of at least 1.5:1 along the inner surface of the at least one outer fluoropolymer layer.

A vehicle window having an outer window pane, an inner window pane, an intermediate layer disposed between the outer window pane and the inner window pane and a switchable layer. The vehicle window may have an opaque masking element disposed laterally next to the intermediate layer, the opaque masking element covering at least a light coupling area of the inner window pane at which light of a light source can be coupled into the inner window pane. Furthermore, a vehicle having such a vehicle window is provided.

A versatile method to create hydrophobic 3-D surfaces with complex hierarchical microstructures that mimic the patterns found on springtail skin is disclosed. The method innovatively merges two fixed-spacing patterns at different scales to create patterns with varying spacing but does not require precise alignment. By utilizing localized stretching strain when gradually laminating a thin microstructured elastomer layer onto a wavy substrate, a pattern is created. To demonstrate this new fabrication process, we laminated a thin polydimethylsiloxane (PDMS) film having a plurality of microstructures thereon, on a wavy PDMS substrate with millimeter-scale inverted pyramidal holes. This resulted in hierarchical surface microstructures that display varying spacings along the peaks and the valleys of the wavy substrate.

Disclosed is a coreless roll of a tissue paper product having a first end and a second end, and a web of tissue paper product being wound such as to define a central inner hole with the first end located on the outer side and the second end located at the inner hole, the product including a bonded first ply and a second ply, a grammage of the product being 35 to 55 g/m2, and having a Geometric Mean Tensile strength of at least 200 N/m, the first ply and the second ply being made of Conventional Wet Press (CWP) paper and embossed to be nested, the coreless roll having an outer diameter of 95 to 150 mm, an inner hole diameter of 20 to 50 mm, and a density of the coreless roll of 70 to 90 kg/m.sup.3, a caliper ratio of the roll of 40% to 70%.

Disclosed is a coreless roll of a tissue paper product having a first end and a second end, and a web of tissue paper product being wound such as to define a central inner hole with the first end located on the outer side and the second end located at the inner hole, the product including a bonded first ply and a second ply, a grammage of the product being 35 to 55 g/m2, and having a Geometric Mean Tensile strength of at least 200 N/m, the first ply and the second ply being made of Conventional Wet Press (CWP) paper and embossed to be nested, the coreless roll having an outer diameter of 95 to 150 mm, an inner hole diameter of 20 to 50 mm, and a density of the coreless roll of 70 to 90 kg/m.sup.3, a caliper ratio of the roll of 40% to 70%.

It is provided a bonded substrate of a support substrate and group-13 nitride crystal substrate. The group-13 nitride crystal substrate comprises one or more transition metal elements selected from the group consisting of zinc, iron, manganese, nickel and chromium in a concentration of 110.sup.17 atoms.Math.cm.sup.3 or higher and 110.sup.21 atoms.Math.cm.sup.3 or lower.