The invention is related to a contact lens, especially a SiHy contact lens, which comprises a lens bulk material covered with an outer surface hydrogel layer thereon and has a posterior surface and an opposite anterior surface. The outer surface hydrogel layer consists of an anterior outer hydrogel layer and a posterior outer hydrogel layer. A contact lens of the invention is characterized by having a difference in surface softness between its posterior (BC) and anterior (FC) surfaces.

A respiratory protection composite facepiece is disclosed and includes a polymeric rigid facepiece body portion having a first surface and a second surface and a silicone sealing facepiece element chemically bonded at least one of the first surface or the second surface. The first and second surfaces can be opposing major surfaces. A second silicone element is chemically bonded to at least one of the first surface or the second surface. Methods of making the same are also disclosed.

The present invention provides a mouthpiece for a vibratory tooth cleaning device for simultaneously cleaning several, preferably all, of a user's teeth, comprising a holder and a silicone casing substantially completely surrounding the holder. In addition, a vibratory tooth cleaning device and a manufacturing method for a silicone casing and mouthpiece are provided.

A composite article and a method for insulating an appliance are disclosed. In general, the appliance is selected from the group of major, domestic or household appliances (e.g. ovens, stoves, ranges, etc.). The appliance has a first surface that defines a heating cavity, and a second surface opposite the first surface. The composite article comprises a backing layer spaced from the first surface, and an insulating layer sandwiched between the second surface and the backing layer. The insulating layer reduces heat transfer from the heating cavity to the backing layer (e.g. during use of the appliance). The insulating layer comprises a foamed silicone. The foamed silicone can be one formed via a hydrosilylation-curable silicone composition, a condensation-curable silicone composition, or a combination thereof. The insulating layer may comprise a foamed room-temperature-vulcanizing (RTV) silicone. The backing layer comprises a foamed polyurethane (PUR), a foamed polyisocyanurate (PIR), or a foamed PUR/PIR hybrid.

Described herein is a method for producing a contact lens comprising a central photochromic zone that has a diameter of about 13 mm or less and is concentric with the central axis of the contact lens. The method comprises: applying a first polymerizable fluid composition containing at least one photochromic compound on a central portion of the molding surface of a female mold half to form a circular layer; partially photocuring, in situ, the circular layer in the female mold half by using a visible light; dispensing a second polymerizable fluid composition over the partially-cured circular layer on the molding surface of the female mold half; and a step of thermally curing the second polymerizable fluid composition and the partially-cured circular layer immersed therein in the mold cavity formed between the molding surfaces of the female mold half and a male mold half.

The present relates to a positioning and shaping shell manufacturing method for manufacturing a positioning and shaping shell comprising a positioning step consisting in positioning and supporting a target body portion with a transparent body shaper in a predetermined position on a positioning board presenting at least one transparent portion permitting scanning through it, an image acquisition step consisting in a target body portion surface scan imaging also via the transparent portion of the board and said transparent body support, a software computing step where the acquired image data are sent and processed in a processing unit, and a producing step consisting in producing a 3D positioning and shaping shell model via additive or subtractive manufacturing method based in the processed image data.

A silicone co-extrusion method for LED light strip, a mold and its extrusion structure are provided and it relates to the technical field of light strip packaging. The silicone co-extrusion method for LED light strip comprises the following steps: Obtaining an elongated adhesive material, the elongated adhesive material comprises a light blocking adhesive material and a diffusion adhesive material; Feeding the light blocking adhesive material, the diffusion adhesive material and a circuit board with a light bead into a light blocking adhesive material channel, a diffusion adhesive material channel and a circuit board channel in a mold, respectively, and extruding the fed light blocking adhesive material and diffusion adhesive material by means of silicone co-extrusion to a silicone light bar outlet to realize forming the light blocking adhesive material and diffusion adhesive material on the circuit board to obtain a silicone light bar; Heating and shaping the silicone light bar extruded from the mold to obtain the LED light strip, wherein the light blocking adhesive material channel, the diffusion adhesive material channel and the circuit board channel are connected to the silicone light bar outlet. The mold in the present disclosure is used to implement the above method, and the LED light strip obtained has good uniformity of emission.

Simulated anatomical components, such as simulated vascular vessels, produced by a method that includes forming an anatomical component mold from a soluble polymer such that the mold defines an interior void of the simulated anatomical component. One or more layers of an elastomeric material is applied around the anatomical component mold and the material is allowed to cure to form a wall of the simulated anatomical component. At least a portion of the mold is dissolved to form a passage for liquid within the simulated anatomical component. Simulated anatomical components are connectable to other components of a surgical simulation system and can be modularized.

The methods and apparatus disclosed in this document may be used to create parts with void features such as holes, cavities, channels, slots, and the like. In some embodiments, the void features have a large depth to width aspect ratio. In some embodiments, the void features are formed in pliable, resilient and/or elastomeric materials. In some embodiments, the void features are formed in parts comprising silicone elastomer or silicone rubber. The void features may be adapted and configured for use in medical applications, aerospace applications, electrical applications, and/or industrial applications in some embodiments.

A dual-molded silicone-polyamide composite article including a first molded piece that comprises a blend of polyamide and an ethylene-vinyl alcohol copolymer and a second molded piece that comprises a thermoset, hydrosilylation-cure silicone polymer. A portion of a surface of the second molded piece is autogenously bonded to a portion of a surface of the first molded piece.