A water soluble polymer composition includes a water soluble polymer and a sugar and may be used as a support in additive manufacturing processes.

A water soluble polymer composition includes a water soluble polymer and a sugar and may be used as a support in additive manufacturing processes.

Described herein is a cast-molding process for producing contact lenses in a relatively-short curing time from a lens-forming composition, which comprises (a) at least one thiol-containing compound or component, (b) at least one metal scavenger, and (c) at least one free radical scavenger and which has a pH of from about 2.5 to about 5. The addition of a chain-transfer agent into a lens-forming composition can reduce not only the curing time of the lens-forming composition but also reduce the elastic modulus of resultant crosslinked materials (e.g., contact lenses) from the lens-forming composition. The lower pH and the addition of metal scavenger and the free radical scavenger into the lens-forming composition can ensure that the lens-forming composition to have a shelf life of at least three days.

Described herein is a cast-molding process for producing contact lenses in a relatively-short curing time from a lens-forming composition, which comprises (a) at least one thiol-containing compound or component, (b) at least one metal scavenger, and (c) at least one free radical scavenger and which has a pH of from about 2.5 to about 5. The addition of a chain-transfer agent into a lens-forming composition can reduce not only the curing time of the lens-forming composition but also reduce the elastic modulus of resultant crosslinked materials (e.g., contact lenses) from the lens-forming composition. The lower pH and the addition of metal scavenger and the free radical scavenger into the lens-forming composition can ensure that the lens-forming composition to have a shelf life of at least three days.

Disclosed is an EVOH resin composition comprising 2 types of EVOH resins having a different ethylene content and saponification degree from each other. The EVOH resin composition can reduce the occurrence of streaks with retaining gas-barrier property even when applying to vacuum-pressure forming. The use of the resin composition also make it possible to provide a method for producing a container such as cup having excellent gas-barrier property and appearance by vacuum-pressure forming and the like.

Disclosed is an EVOH resin composition comprising 2 types of EVOH resins having a different ethylene content and saponification degree from each other. The EVOH resin composition can reduce the occurrence of streaks with retaining gas-barrier property even when applying to vacuum-pressure forming. The use of the resin composition also make it possible to provide a method for producing a container such as cup having excellent gas-barrier property and appearance by vacuum-pressure forming and the like.

A thermoplastic resin composition that can provide molded articles that are not only highly rigid but also inhibited from generating hitting sound is provided, which has a bending modulus of 1850 MPa or higher as measured in accordance with ISO 178 and has a maximum sound pressure value of 2.0 Pa/N or lower as determined over a range of 20-20,000 Hz based on a frequency spectrum of sound pressure obtained by striking the center of one surface of a test piece with a force of 205 N using a stainless steel hammer, and collecting a sound generated at this moment using a sound pressure microphone placed at a distance of 12 cm perpendicularly from the above surface, the test piece being an integrally molded article having a rectangular main body that is 120 mm long, 60 mm wide and 3 mm thick and is provided with an upper end thereof with a trapezoidal protrusion that has a 20 mm upper base and a 40 mm lower base, is 8 mm tall and 1.5 mm thick, and being suspended by two strings taped to the protrusion.

A thermoplastic resin composition that can provide molded articles that are not only highly rigid but also inhibited from generating hitting sound is provided, which has a bending modulus of 1850 MPa or higher as measured in accordance with ISO 178 and has a maximum sound pressure value of 2.0 Pa/N or lower as determined over a range of 20-20,000 Hz based on a frequency spectrum of sound pressure obtained by striking the center of one surface of a test piece with a force of 205 N using a stainless steel hammer, and collecting a sound generated at this moment using a sound pressure microphone placed at a distance of 12 cm perpendicularly from the above surface, the test piece being an integrally molded article having a rectangular main body that is 120 mm long, 60 mm wide and 3 mm thick and is provided with an upper end thereof with a trapezoidal protrusion that has a 20 mm upper base and a 40 mm lower base, is 8 mm tall and 1.5 mm thick, and being suspended by two strings taped to the protrusion.

A water soluble film useful in unit-dose chemical packaging is disclosed. The film may include: a water soluble saccharide and a polyvinyl alcohol copolymer consisting essentially of: (a) from 80 to 99 mole percent of vinyl alcohol and vinyl ester monomer; and (b) from 1 to 20 mole percent of a pyrrolidone comonomer. Such compositions may be used to provide a water-soluble film simultaneously satisfying requirements in regard to water solubility, biodegradability, and physical properties, even when used for packaging a broad range of harsh, oxidizing chemicals.

A water soluble film useful in unit-dose chemical packaging is disclosed. The film may include: a water soluble saccharide and a polyvinyl alcohol copolymer consisting essentially of: (a) from 80 to 99 mole percent of vinyl alcohol and vinyl ester monomer; and (b) from 1 to 20 mole percent of a pyrrolidone comonomer. Such compositions may be used to provide a water-soluble film simultaneously satisfying requirements in regard to water solubility, biodegradability, and physical properties, even when used for packaging a broad range of harsh, oxidizing chemicals.