Freestanding microporous thin films, made using plastic waste, can be used as a hydrophobic coating, filtration membranes, or oil-sorbents. A method for producing the microporous thin film involves dissolving the plastic in an organic solvent to obtain a solution; and applying the solution onto a solid substrate through spin-coating followed by controlled heating, resulting in a freestanding porous thin film. Plastic waste comprises recycled polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), or polystyrene (PS), recovered from a waste plastic material derived from post-consumer and/or industrial waste. The approach of fabricating multi-functional thin films from plastic waste combines an effective way to address multiple environmental issues simultaneously.

The present invention provides a means for improving peeling durability of a tubular article to be produced and properties thereof at the time of use while having high productivity in a method for producing a tubular article. The present invention relates to the method for producing a tubular article including: continuously coating at least two coating solutions for forming a polyimide resin layer to form a stacked coating film, the two coating solutions each including a solvent-soluble polyimide; and a solvent having a vapor pressure at 25 C. of 10 kPa or more and 19 kPa or less.

Simulated tissue structures for practicing surgical techniques and methods of manufacturing those structures are provided. In particular, a realistic organ model or simulated tissue portion for practicing the removal of a tumor or other undesired tissue followed by suturing a remnant defect as part of the same surgical procedure is provided. The simulated tissue structures include a polyp simulation having a suturable mesh layer that is separable from a defect layer. A simulated colon model with interchangeable and suturable tissue pods is also provided as is a fully suturable rectum model and a rectum model with integrative suturable and removable polyp zones.

A process for the manufacture of a heart valve of polymer material which provides for the deposition of a polymer solution comprising a copolymer which is preferably a copolymer of poly(carbonato-urethane) fluoridate (F-PCU) and intracatenary polydimethylsiloxane (PDMS), a PDMS with a functional group outside the chain and a solvent onto a mould using a spray technique associated with phase inversion.

The present invention describes a method (600, 600a) of forming bitumen bags (605) for packaging bitumen products into blocks or slabs. Each block/slab of bitumen (200,200a,200b,200c) is encapsulated in the bitumen bag, which is composed of a bitumen compound (160). The bitumen compound (160) is made up of about 10-30% by weight of natural bitumen and about 5-25% by weight of a synthetic rubber polymer and copolymers. The bitumen compound (160) is melted with the bitumen content and is fully miscible with the molten bitumen, leaving no residue but enhances the physical properties of the resultant bitumen mixture.

The present invention relates to a method for manufacturing a microstructure, the method comprising the steps of: (a) preparing a viscous composition on a lower substrate; and (b) applying centrifugal force to the viscous composition to induce extension of the viscous composition, thereby manufacturing a microstructure. According to the present invention, (i) a microstructure having a micro-unit diameter and sufficient effective length and hardness is provided; (ii) any process that may destroy activation of a drug or cosmetic component, such as high-temperature treatment, organic solvent treatment, etc., is avoided; (iii) loss resulting from contact and separation is reduced; (iv) the limitation of aspect ratio of the manufactured microstructure is overcome; (v) the limitation of yield resulting from flatness is overcome; and (vi) microstructures of various shapes can be manufactured.

A manufacturing method for a pressure tank includes disposing a preform, in which a fiber layer is formed on an outer surface of a liner that forms an internal space of a pressure tank, within a mold, and rotating the preform in a circumferential direction within the mold with a central axis of the preform as a rotation center while resin is injected toward the preform disposed within the mold from a gate.

One method for creating barrier products (for example, condoms and gloves) includes: (a) dipping a former into a tank of elastic compound. The former has an indentation extending inwardly from an outer surface for creating a first protrusion on a first face of the barrier product. The method further includes: (b) removing the former from the tank of elastic compound, whereby some of the elastic compound removably adheres to the former and fills the indentation; (c) applying supplemental material to the elastic compound, whereby creating a second protrusion on a second face of the barrier product; and (d) fully drying the supplemental material. One barrier product includes an elastic wall having opposed faces, and first and second protrusions respectively extend from the opposed faces. The first and second protrusions are in cross-sectional alignment whereby rotational input forces on the first protrusion create rotational output forces on the second protrusion.

The technical solution relates to the field of processing polymers and can be used in various branches of the national economy for manufacturing hollow articles of the bodies-of-revolution type (tubes), and in particular for manufacturing semifinished biodegradable polymeric stents which are usable in medicine for replacing hollow organs, for example blood vessels. The apparatus for manufacturing thin-walled bodies of revolution comprises a heatable expander which is mounted rotatably about a longitudinal axis, and a feeder for supplying moldable material, said feeder being mounted above the expander so as to be movable therealong, wherein the lower part of the feeder is heatable, the expander is hollow with a reflective internal surface, and the heater of the expander is in the form of a laser, the radiation of which is transported into the expander. The use of the apparatus will make it possible to reduce the thermal action on a polymer when producing semi-finished articles with defined geometrical dimensions from polymeric materials.

An apparatus for and method of manufacturing an improved wire-reinforced plastic tubing for medical and other applications is disclosed. A plurality of spaced-apart wire segments may be wound onto successive portions of a long segment of plastic tubing which portions are supported for rotation to wind coil wire thereon by rotating the plastic tubing while a supply of coil wire is wound onto the plastic tubing. When multiple winding segments have been wound on the long segment of plastic tubing, the segments may be separated into individual wire-reinforced tubing products each having one or more wire windings thereupon.