A resin composition containing a polyvinyl alcohol-based resin, 0.1% by mass or more and 1.2% by mass or less of a surfactant, and at least any one of an inorganic filler and silicone particles, wherein the resin composition is free of a plasticizer or comprises 5.0% by mass or less of a plasticizer, and satisfies at least any one of the following requirements (1) and (2). (1) The content of the inorganic filler is 1% by mass or more and 30% by mass or less (2) The content of the silicone particles is 0.01% by mass or more and 0.45% by mass or less

A resin composition containing a polyvinyl alcohol-based resin, 0.1% by mass or more and 1.2% by mass or less of a surfactant, and at least any one of an inorganic filler and silicone particles, wherein the resin composition is free of a plasticizer or comprises 5.0% by mass or less of a plasticizer, and satisfies at least any one of the following requirements (1) and (2). (1) The content of the inorganic filler is 1% by mass or more and 30% by mass or less (2) The content of the silicone particles is 0.01% by mass or more and 0.45% by mass or less

A method is provided for manufacturing a complex hollow article from a flexible polymer material. The method includes using an additive manufacturing system to form a precursory structure that is formed from a build material and phase change material, melting and removing the phase change material, injecting uncured liquid flexible polymer material into a cavity defined by the build material, curing and solidifying the flexible polymer material, and cracking and removing the build material from the flexible polymer material to provide the hollow article.

A method is provided for manufacturing a complex hollow article from a flexible polymer material. The method includes using an additive manufacturing system to form a precursory structure that is formed from a build material and phase change material, melting and removing the phase change material, injecting uncured liquid flexible polymer material into a cavity defined by the build material, curing and solidifying the flexible polymer material, and cracking and removing the build material from the flexible polymer material to provide the hollow article.

Land vehicles, powertrain units for land vehicles, and methods of using land vehicles are disclosed herein. In certain embodiments, the land vehicles are provided as delivery vehicles and/or utility vehicles. A land vehicle includes a frame structure having a front cage that defines an operator cabin and a rear floor positioned rearward of the front cage. The frame structure supports a plurality of wheels to permit movement of the vehicle relative to an underlying surface in use of the land vehicle. An underside of the frame structure is disposed in confronting relation with the underlying surface.

Land vehicles, powertrain units for land vehicles, and methods of using land vehicles are disclosed herein. In certain embodiments, the land vehicles are provided as delivery vehicles and/or utility vehicles. A land vehicle includes a frame structure having a front cage that defines an operator cabin and a rear floor positioned rearward of the front cage. The frame structure supports a plurality of wheels to permit movement of the vehicle relative to an underlying surface in use of the land vehicle. An underside of the frame structure is disposed in confronting relation with the underlying surface.

Electric vehicles are disclosed herein. In certain embodiments, an electric vehicle includes a front cage, a rear floor, an intermediate section, a utility cabinet, and a flatbed. In other embodiments, an electric vehicle includes a front cage, a rear floor, an intermediate section, and a flatbed. In some embodiments, the front cage at least partially defines an operator cabin, the rear floor is positioned rearward of the front cage in a longitudinal direction, and the intermediate section is disposed at least partially between the front cage and the rear floor in the longitudinal direction.

In certain embodiments, an electric vehicle includes a front cage, a rear floor, an intermediate section, a utility cabinet, and a flatbed. In other embodiments, an electric vehicle includes a front cage, a rear floor, an intermediate section, and a flatbed. In some embodiments, the front cage at least partially defines an operator cabin, the rear floor is positioned rearward of the front cage in a longitudinal direction, and the intermediate section is disposed at least partially between the front cage and the rear floor in the longitudinal direction.

A structural reinforcement for an article including a carrier that includes: (i) a mass of polymeric material having an outer surface; and (ii) at least one consolidated fibrous insert (14) having an outer surface and including at least one elongated fiber arrangement having a plurality of ordered fibers arranged in a predetermined manner. The fibrous insert is envisioned to adjoin the mass of the polymeric material in a predetermined location for carrying a predetermined load that is subjected upon the predetermined location (thereby effectively providing localized reinforcement to that predetermined location). The fibrous insert and the mass of polymeric material are of compatible materials, structures or both, for allowing the fibrous insert to be at least partially joined to the mass of the polymeric material. Disposed upon at least a portion of the carrier may be a mass of activatable material.

A shrinkable film capable of being overlapped and heat sealed, a preparation method for the film, and a packaging bag prepared using same, including outer surface layers and a heat sealing layer. Each outer surface layer includes a low-molecular weight compound and is subjected to electron cross-linking treatment, and the low-molecular weight compound is selected from paraffin, oleamide, stearic acid, and one or more of their derivatives. The low-molecular weight compound in each outer surface layer can, during overlapping and heat sealing, be migrated in a polymer under the action of being heated to influence movement of polymer molecular chains, and can be migrated to two molten interfaces to hinder mutual penetration of the polymer molecular chains. Further, by performing electronic cross-linking treatment on the outer surface layers, the outer surface layers form a polymer molecular chain cross-linking structure, and the movement of the polymer molecular chains is reduced.