The invention relates to the use of molding materials for 3-D printing, containing components A, B1, B2, and C, wherein: A:5 to 100 wt % of at least one vinyl aromatic/diene block copolymer A, containing: a) 30 to 95 wt % of at least one vinyl aromatic and b) 5 to 70 wt % of at least one diene, B1:0 to 95 wt % of at least one polymer B1 selected from the group comprising standard polystyrene, high-impact polystyrene (HIPS), styrene/acrylonitrile copolymers, α-methylstyrene/acrylonitrile copolymers, styrene/maleic anhydride copolymers, styrene/phenylmaleimide copolymers, styrene/methylmethacrylate copolymers, styrene/acrylonitrile/maleic anhydride copolymers, styrene/acrylonitrile/phenylmaleimide copolymers, methylstyrene/acrylonitrile/methylmethacrylate copolymers, α-methylstyrene/acrylonitrile/t-butyl methacrylate copolymers, and styrene/acrylonitrile/t-butyl methacrylate copolymers, B2:0 to 60 wt % of one or more further polymers B2 selected from: polycarbonates, polyamides, poly(meth)acrylates, polyesters, semicrystalline polyolefins, and polyvinyl chloride, C:0 to 50 wt % of common additives and auxiliary agents, wherein the viscosity (measured as per ISO 11443) of the molding material at shear rates of 1 to 10 1/s and at temperatures of 250° C. is not greater than 1×10.sup.5 Pa*s and the melt volume rate (MVR, measured as per ISO 1133 at 220° C. and 10 kg load) is more than 6 ml/10 min.

A method of fabricating a cross-layer pattern in a layered object is disclosed. The method is executed by an additive manufacturing system and comprises: dispensing a patterning material onto a receiving medium to form a first pattern element; dispensing a first layer of modeling material onto the first pattern element while forming a first open cavity exposing at least a portion of the first pattern element beneath the first layer; and dispensing patterning material onto the exposed portion of the first pattern element and the first layer to form a second pattern element contacting the first pattern element.

A functional polymeric cutting edge structure and methods for manufacturing cutting edge structures using polymeric materials are provided. A razor blade for use in a razor cartridge or a blade box for assembly in a razor cartridge frame may be formed using the present invention.

A method of injection molding parts, including: injecting a first thermoplastic polymer into a first cavity; forming a ribbed structure comprising ribs in the first cavity, wherein each rib in the ribbed structure includes a microstructure on an outer portion of a rib; and reducing the surface imperfections in the part by overmolding a layer formed in the second cavity onto a portion of a rib by injecting a second thermoplastic polymer into the second cavity, wherein the overmolding occurs at an interface between the layer and the ribbed structure; or injecting a first thermoplastic polymer into a first cavity; forming a layer in the first cavity; and overmolding a ribbed structure comprising ribs formed in the second cavity onto a portion of the layer formed in the first cavity. In further variations gas is injected into a microchannel formed at the interface or a foaming agent is applied in the first thermoplastic polymer.

A resin infusion method that incorporates a melt-on-demand approach. The method includes: (a) providing a curable resin composition in the form of a block of frozen resin (20); (b) coupling the block of frozen resin (20) to an inlet port of a heated extruder (22), which comprises at least one rotating screw (24) housed within a heated barrel (25); (c) progressively melting the block of frozen resin (20) at the inlet port and concurrently feeding the melt resin through the heated barrel (25) to produce a liquid resin having a viscosity suitable for resin infusion; (d) continuously feeding the liquid resin exiting from the extruder to a mold, which contains a fibrous preform; and (e) introducing the liquid resin into the fibrous preform, wherein the block of frozen resin (20) provides an amount of resin composition sufficient for infusing the entire fibrous preform.

A shoe sole comprising an elastomeric composition comprising: (D) 100 phr of a mixture of rubbers comprising: i. from 40 to 70% by weight of an isoprene polymer; ii. from 20 to 50% by weight of polybutadiene; iii. from 10 to 40% by weight of an SBR having a glass transition temperature (Tg) from −60 to −40° C.; (E) from 50 to 100 phr of amorphous carbon black having a surface area greater than 85 m.sup.2/g measured with the ASTM D6556 method, and a dibutyl phthalate absorption index (DBPA) greater than 90 measured with the ASTM D2414 method; (F) from 1 to 30 phr of graphene nano-platelets, wherein at least 90% of said graphene nano-platelets has a side dimension (x, y) from 50 to 50000 nm and a thickness (z) of 0.34 to 50 nm, and wherein said graphene nano-platelets have a C/O ratio ≥100:1.

Disclosed herein are compositions for three-dimensional printing. In an example, disclosed herein is a composition for three-dimensional printing comprising: (A) a powder build material; (B) a first fusing agent; (C) a second fusing agent different from the first fusing agent; (D) a detailing agent; (E) a cyan ink composition; (F) a yellow ink composition; (G) a magenta ink composition; and (H) a black ink composition.

A curable silicone composition is described. Also described, is a method of producing a three-dimensional (3D) printed article with a curable silicone composition involving epoxy-related photocuring and hydrosilylation curing. In exemplary embodiments, the resulting three-dimensional (3D) printed article thus formed and the curable silicone composition or the resulting three-dimensional (3D) printed article can be used in electronics applications and/or in 3D printing.

The present invention relates to a method for producing three-dimensional models by a layering technique, particulate build material being applied to a build space, and binder material subsequently being selectively applied to the build material with the aid of a printer, the binder material containing a moderating agent and subsequently being sintered with the aid of a heat lamp, the print head being protected against overheating by active and/or passive cooling.

A method of making an organ or tissue comprises: (a) providing a first dispenser containing a structural support polymer and a second dispenser containing a live cell-containing composition; (b) depositing a layer on said support from said first and second dispenser, said layer comprising a structural support polymer and said cell-containing composition; and then (c) iteratively repeating said depositing step a plurality of times to form a plurality of layers one on another, with separate and discrete regions in each of said layers comprising one or the other of said support polymer or said cell-containing composition, to thereby produce provide a composite three dimensional structure containing both structural support regions and cell-containing regions. Apparatus for carrying out the method and composite products produced by the method are also described.