The object of the invention is a lens for a lighting and/or signaling device of a motor vehicle including a first layer of material (4), arranged on a first face (8) of which is a second layer of material (6) with additional thickness, said second layer extending partially over the first layer so as to have one end edge (16) overhanging an exposed portion (14) of the first layer of material. The exposed portion (14) of the first layer of material (4), which is not covered by the second layer of material, includes on said first face (8) a notch (18) which extends along said end edge (16) of the second layer of material (6).

A molded object, which is thermoformed by a thermoplastic wear-resistant molding membrane, has a plurality of concave-convex parts; the molded object comprises: a polycarbonate polyurethane (PU) layer; a thermoplastic polyurethane (PU) layer with ductility and elasticity, disposed on one surface of the polycarbonate PU layer; and an intermediate PU layer disposed between the polycarbonate PU layer and the thermoplastic PU layer; the polycarbonate PU layer is a surface layer of the molded object, the thermoplastic PU layer is an inner layer of the molded object; the concave-convex part comprises a plurality of upwardly protruding pressing parts, each of the pressing parts has a top wall and a peripheral wall extending downward from a periphery of the top wall; at least one character is disposed on the top wall of each of the pressing parts, and the character is formed by at least removing a material of the polycarbonate PU layer, so that the top wall forms a hollow part penetrating the polycarbonate PU layer.

Provided herein is a method of making an object having a matte surface finish by stereolithography. The method may include: (a) stereolithographically producing an intermediate object by polymerization of a dual cure resin with a first light having a first peak wavelength, the object having excess unpolymerized resin retained on the surface thereof; (b) separating a portion of said excess unpolymerized resin from said object while leaving a thin film of unpolymerized resin on the surface thereof; (c) partially curing said thin film by exposing said thin film to a second light at a second peak wavelength; and then (d) further curing said intermediate object by heating, microwave irradiating, or both heating and microwave irradiating, to produce an object having a matte surface finish.

The present invention relates to a multilayer construction containing a support or frame composed of a nontransparent polymer as layer c) and a transparent layer b) based on a thermoplastic polymer having a solar transmittance TDS of more than 20%, determined in accordance with ISO 13837:2008 at a layer thickness of 4 mm, and a siloxane-based protective layer a) which is applied to layer c) and layer b), wherein the siloxane layer a) is selectively postcured in selected regions by means of ultrashort-wave UV radiation, and to a method for selective surface treatment.

The invention is also directed to a coextruded film comprising a core layer which comprises between 20 wt. % and 99 wt % znLLDPE or HDPE, wherein the core layer further comprises filler materials; and outer layers on each side of the core layer comprising between 50 and 99 wt % of one of LLDPE, LDPE, blends of LLDPE and LDPE, or mLLDPE; wherein the film contains relatively opaque embossed regions and relatively clear unembossed regions, wherein the opaque embossed regions comprise embossment-induced cavities and the filler materials.

Manufacturing a pre-molded stack of one or more lenses to be installable on a curved substrate such as a vehicle windshield includes placing a moldable stack of one or more lenses and adhesive layer(s) on a mold, applying heat and pressure to the moldable stack to produce a pre-molded stack of one or more lenses from the moldable stack, and removing the pre-molded stack from the mold. The pre-molded stack may have a compound curvature, which may match a curvature of the curved substrate. The mold may be formed using three-dimensional shape data derived from the curved substrate, such as by optically scanning the curved substrate.

A method of manufacturing a radar transparent cover may include steps of: injection molding a first transparent cover; inserting into a mold the first transparent cover made by the step of injection molding the first transparent cover and then, double injection molding a color resin on a back surface of the first transparent cover; and inserting into a mold the injection molded article made by the step of double injection molding the color resin and then, double injection molding a second transparent cover on a front surface of the first transparent cover.

An orthodontic appliance shaped to receive teeth. The orthodontic appliance can be constructed from a laminate structure with a outer transparent layer and an inner translucent layer. The translucent layer can scatter light to decrease a relative degree or perceived gloss to the human eye, and hence provide a more natural appearance to the orthodontic appliance.

An orthodontic appliance shaped to receive teeth. The orthodontic appliance can be constructed from a laminate structure with an outer transparent layer and an inner translucent layer. The translucent layer can scatter light to decrease a relative degree or perceived gloss to the human eye, and hence provide a more natural appearance to the orthodontic appliance.

A headlight lens assembly includes a projector lens portion and an outer portion. The projector lens portion is configured to couple to a projector, and is formed by a multi-step molding process. The outer portion is formed as one piece with the projector lens portion during at least one step of the multi-step molding process.