A mold apparatus for forming a molded part includes a mold body, a mold cavity formed in said mold body, a plurality of valve gates associated with said mold body, and a controller in communication with said plurality of valve gates. The controller is programmed to time opening of each valve gate based on a selected flow rate required to eliminate weld lines in the product.

Provided is a method for forming an ophthalmic lens as well as a lens formed by such method. The method includes the curing of a reactive monomer mixture within a mold assembly under conditions to permit incorporation of functional features into selective portions of the ophthalmic lens.

A photocurable transparent ink composition for three-dimensional molding includes the following components in parts by weight: 60-125 parts of a photocuring agent, 0.01-5 parts of a yellowing adjusting agent, 0.5-5 parts of a photoinitiator, and 0.5-5 parts of an auxiliary agent, where the yellowing adjusting agent can absorb light in a wavelength range of 560 nm to 650 nm, so that the ink composition appears transparent. The photocurable transparent ink composition for three-dimensional molding can prevent yellowing of a printed article and make the printed article show a whiter, more transparent, and brighter appearance.

A steering wheel includes a core and a foamed polyurethane coating that covers a ring section of the core. The foamed polyurethane coating is formed by foam molding of a polyurethane material containing 91 parts by mass of a base polyol, 10 to 25 parts by mass of a pigment, 1 to 3 parts by mass of a benzotriazole ultraviolet absorber, 0.8 to 2.5 parts by mass of a hindered amine photostabilizer, and a polyisocyanate. A total amount of the ultraviolet absorber and the photostabilizer is 2.7 parts by mass or more. The foamed polyurethane coating is in the form of an integral skin foam including a highly foamed core foam and a lowly foamed skin layer. The surface of the skin layer is not provided with a coating film formed from a coating material, and serves as a product surface that assumes a color of the pigment.

In general, the disclosure relates to methods and compositions for preparing colorants useful for preparing pigmented hydrogels. The disclosure further relates to pigmented hydrogels comprising the disclosed colorants. In some instances, the colorant is an alcohol extract of an agro-material, such as turmeric, paprika, spinach, and/or woad or the colorants comprise one or more of: a carotenoid, chlorophyll-a, chlorophyll-b, a curcumoid, or indigorubin. Alternatively, the colorant can be carbon black. The disclosure further relates to contact lenses comprising the disclosed pigmented hydrogels.

Disclosed is a shaping system for shaping a three-dimensional object, which includes a slice data generation step that generates slice data and a shaping execution step that shapes the three-dimensional object by a shaping apparatus based on the slice data. The shaping apparatus shapes the three-dimensional object using inkjet heads. The slice data generation step has a color cross-section data generation step that generates color cross-section data showing at least a cross-sectional shape of the three-dimensional object and a color at each position, a plate division data generation step that generates plate division cross-section data in which the color cross-section data is color-separated for each color of the material, and a plate division cross-section data change step that changes at least some plate division cross-section data. The slice data is generated based on the plate division cross-section data changed in the plate division cross-section data change step.

Apparatus and methods for converting granular plastic resin into colored finished or semi-finished plastic parts include a process machine having a barrel with a vertically opening feed throat, a rotatable screw inside the barrel, and a color feed conduit assembly positioned at least partially within the process machine and extending into the barrel for passage of liquid color downwardly through the color feed conduit assembly into proximity with the screw.

Halogen-free decorative surface covering compositions comprising a polymer blend, the polymer blend comprising: a) at least one thermoplastic elastomer, the thermoplastic elastomer being a block copolymer comprising hard and soft sequences, wherein the hard sequence is a (co)polymer of one or more vinyl aromatic monomer(s) and wherein the soft sequence is a (co)polymer of one or more alkylene(s) or of a mixture of one or more alkylene(s) and one or more vinylaromatic monomers; b) at least one thermoplastic polyurethane.

A three-dimensionally printed object includes a plurality of different material regions that together define a surface region of the object. The plurality of different material regions includes a first material region and a second material region. The first material region has a first color, and the second material region has a second color that is different from the first color. The different material regions overlap from each other within the object by different amounts viewed from different directions so that different proportions of light from the plurality of different material regions are visible to an observer viewing the surface region of the three-dimensionally printed object from different view directions, different view angles, and with illumination lighting the surface region at different angles. A coloration of the surface region is altered based on the proportions of light from the plurality of different material regions visible to the observer.

A blow molded monolayer article. The article has a hollow body defined by a wall. The wall has one or more regions comprising a first composition and one or more regions formed by a second composition.