Resin compositions, layers, and interlayers comprising two or more thermoplastic polymers and at least one RI balancing agent for adjusting the refractive index of at least one of the resins or layers is provided. Such compositions, layers, and interlayers exhibit enhanced optical properties while retaining other properties, such as impact resistance and acoustic performance.

A composition for the preparation of a transparent, non-elastomeric optical article is provided, the composition including: (1) a polyisocyanate component containing one or more different polyisocyanates; and (2) a component that is reactive with isocyanates, including: (a) optionally at least one polyol having a number average molecular weight greater than 500; (b) (i) at least one polyol and/or polythiol and (ii) at least one compound containing both amine and hydroxyl functional groups, wherein the compound (ii) has a number average molecular weight less than 500; and optionally (3) a urethanation catalyst. Multi-step and one-pot methods of preparing a cured, non-elastomeric polyurethane-containing optical article are also provided.

Provided is an aromatic polycarbonate resin sheet/film which has excellent bending characteristics and surface smoothness. It is found that a sheet having excellent surface smoothness, which cannot be achieved by conventional sheets, can be obtained by adjusting sheet extrusion conditions for a polycarbonate resin sheet/film into which a reinforcing filler is blended. It is also found that a thermally shaped article having excellent appearance can be obtained by using this sheet in pressure molding or in thermal press molding.

Disclosed herein is an injection molding method for making optical thermoplastic lenses using 3D-printed functional wafers. The method employs a variable injection molding cavity temperature that is heated to at least wafer Tg10 C.

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 mould assembly is provided, comprising an upper mould and a lower mould, a release film is provided between the upper mould and the lower mould, the lower mould defines a cavity for processing a workpiece, the release film covers the cavity, a bottom surface of the cavity provides an exhaust area, the exhaust area defines a plurality of exhaust grooves, the lower mould defines one or more through-holes, the plurality of exhaust grooves is communicated with one or more through-holes, a width of the plurality of exhaust grooves is less than a width of the release film, one or more through-holes draw the air to make the release film attach on the bottom surface of the cavity.

A diffraction light guide plate comprising an optical layer having diffraction lattice pattern formed as an integrated structure without an interface on one surface thereof, where the optical layer having diffraction lattice pattern is a continuous phase of polymer comprising an episulfide compound, a thiol compound, and an aromatic cyclic compound having two or more hydroxyl groups, the diffraction light guide plate having excellent thickness uniformity and flatness as well as low haze and excellent visibility, and excellent mechanical properties such as pencil hardness and strength, and a method for manufacturing the diffraction light guide plate.

The present invention is related to a method and apparatus for the volumetric fabrication of three-dimensional objects or articles from photoresponsive materials loaded with scattering particles, by adjusting the refractive index of said photoresponsive material (12) so as to match the refractive index of said scattering particles (30), and/or using a light source emitting light of a wavelength longer than 630 nm, preferably in a range from 630 nm to 1050 nm, more preferably in a range from 650 nm to 900 nm.