A volatile corrosion inhibitor composition comprising about 1 wt. % to about 100 wt. % of a polyacrylamide is disclosed that prevents corrosion of metal materials. A volatile corrosion inhibitor composition may also include a second volatile corrosion inhibitor selected from the group consisting of: ammonium salt, triazole, nitrite, nitrate, an amine carboxylate, an amine, a carboxylic acid, aldehyde, anhydride and any combination thereof. An anticorrosion method of a metal material using the volatile corrosion inhibitor composition is also disclosed.

A molded contact lens comprising a stiffer optic zone relative to the peripheral zone of the contact lens provides an optical element for correcting astigmatism without the need for or substantially minimizing the need for the correction of rotational misalignment. The higher elastic modulus optic zone vaults over the cornea thereby allowing a tear lens to form. The tear lens follows or assumes the shape of the back surface of the contact lens. The combination of the tear lens and the optical zone provide an optical element for correction of refractive error.

Provided are methods and systems for manufacturing and using heat-shrink elastomeric. An example method of manufacturing a heat-shrink elastomeric element comprises providing a thermoplastic elastomeric element having a first shape; modifying the thermoplastic elastomeric element to produce a thermoset elastomeric element having the first shape; heating the thermoset elastomeric element to a temperature of at least the glass transition temperature of the thermoset elastomeric element; adjusting the first shape of the thermoset elastomeric element to produce a second shape with at least one dimension greater than that of the first shape; and cooling the thermoset elastomeric element to a temperature below that of the glass transition temperature of the thermoset elastomeric element to produce the heat-shrink elastomeric element.

Provided are methods and systems for manufacturing and using heat-shrink elastomeric. An example method of manufacturing a heat-shrink elastomeric element comprises providing a thermoplastic elastomeric element having a first shape; modifying the thermoplastic elastomeric element to produce a thermoset elastomeric element having the first shape; heating the thermoset elastomeric element to a temperature of at least the glass transition temperature of the thermoset elastomeric element; adjusting the first shape of the thermoset elastomeric element to produce a second shape with at least one dimension greater than that of the first shape; and cooling the thermoset elastomeric element to a temperature below that of the glass transition temperature of the thermoset elastomeric element to produce the heat-shrink elastomeric element.

Provided is a composition including an acrylamide compound having a molecular weight of 150 or greater but 250 or less (A1), a polyfunctional polymerizable compound including an alkylene oxide group (A2), and a polyfunctional polymerizable compound (A3) different from the polyfunctional polymerizable compound (A2).

A surgical simulator for electrosurgical training and simulation is provided. The surgical simulator includes one or more simulated tissue structures made substantially of a hydrogel comprising a dual interpenetrating network of ionically cross-linked alginate and covalently cross-linked acrylamide. Combinations of different simulated tissue structures define procedural-based models for the practice of various electrosurgical procedures including laparoscopic total mesorectal excision, transanal total mesorectal excision, cholecystectomy and transanal minimally invasive surgery. Methods of making the simulated tissue structures are also provided.

Process for cutting a water-soluble web in a cross-machine direction. Each cutting cycle contains at least two speeds. A first speed matches that of the speed of the water-soluble web and is also the speed at the point of cutting, and a second speed is faster than the speed of the water-soluble web in the machine direction and is the speed at a point in-between two cutting actions.

Provided is a three-dimensional model including: a three-dimensional body formed of a hydrogel containing a water-based solvent and a polymer; and a coating film coating the surface of the three-dimensional body and formed of a hydrogel containing a water-based solvent and a polymer.

A photo-curable resin composition for three-dimensional molding which does not require a support material is provided and can be cured by light irradiation while being extruded from a nozzle through a simple FDM method to be stacked and molded in a short period of time. The photo-curable resin composition has a viscosity at 20 C. of 0.2 Pa.Math.s or more and a viscosity at 150 C. of 1000 Pa.Math.s or less.

Process for cutting a water-soluble web in a cross-machine direction.