A three-dimensionally printed article comprises a build material and a support material, the support material comprising a hydroxypropyl methylcellulose having a DS of at least 1.0 and an MS of at least 0.6, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxypropoxyl groups. The support material can be removed from the build material by contacting the support material with water.

A method for producing flame retardant polycarbonate resin composition pellets using a twin screw extruder. A composition of 30 to 85 mass % of resin pellets in which a polycarbonate resin having 2.7 to 3.4 of Mw/Mn at more than 40 mass % in the resin pellets; 5 to 25 mass % of phosphorus flame retardant; 0.1 to 1.0 mass % of polytetrafluoroethylene; 0 to 50 mass % of polycarbonate resin flake; 0 to 30 mass % of styrenic copolymer resin; and 0 to 15 mass % of another additive (F) are kneaded by the twin screw extruder in a kneading section. The kneading uses a screw configuration consisting of two or more of an R kneading disc, an N kneading disc, an L kneading disc, an L screw, a sealing ring, a mixing screw, and a rotor screw. The kneaded composition is extruded as a strand from the extruder and then cut.

Embodiments of the present disclosure generally relate to housings for, e.g., memory devices and electronic devices, and to processes for forming such housings. In an embodiment, an article for housing at least a portion of an electronic device is provided. The article includes a first component comprising a thermoplastic and a biodegradable filler or polymer, and a second component disposed on at least a portion of the first component, the second component comprising a plurality of layers. The article has a scratch visibility load of about 200 gms or more, an electrostatic discharge static voltage of about 100 V or less, a thermal conductivity of about 0.28 W/mK or more, or combinations thereof.

A novel material for producing auxetic foams is disclosed. The material comprises a multiphase, multicomponent polymer foam with a filler polymer having a carefully selected glass transition temperature. Novel methods for producing auxetic foams from the material are also disclosed that consistently, reliably and quickly produce auxetic polyurethane foam at about room temperature (25 C.). This technology overcomes challenging issues in the large-scale production of auxetic PU foams, such as unfavorable heat-transmission problem and harmful organic solvents.

A thermoplastic resin composition includes a component (A) in an amount of 1 to 20 parts by mass, a component (B) in an amount of 0 to 50 parts by mass, a component (C) in an amount of 40 to 90 parts by mass, and a component (D) wherein a total of the components (A) to (C) is 100 parts by mass, and an amount of the component (D) is 0.1 to 5 parts by mass per 100 parts by mass of the total of the components (A) to (C). Component (A) is a rubber-reinforced styrenic resin from polymerization, in the presence of a rubbery polymer, of a vinyl monomer, component (B) is a styrenic resin from polymerization of a vinyl monomer, component (C) is an aromatic polycarbonate resin, and component (D) is tetrafluoroethylene polymer having a number average molecular weight of 100,000 or more by the DSC method.

Embodiments of the present disclosure generally relate to housings for, e.g., memory devices and electronic devices, and to processes for forming such housings. In an embodiment, an article for housing at least a portion of an electronic device is provided. The article includes a first component comprising a thermoplastic and a biodegradable filler or polymer, and a second component disposed on at least a portion of the first component, the second component comprising a plurality of layers. The article has a scratch visibility load of about 200 gms or more, an electrostatic discharge static voltage of about 100 V or less, a thermal conductivity of about 0.28 W/mK or more, or combinations thereof.

The teachings herein are directed to multi-layered articles, methods for making the multi-layered articles, and polymeric compositions for the multi-layered articles. The multi-layered article includes a substrate layer and an overmolded cover layer. The substrate layer preferably is a polymeric composition including about 55 weight percent or less (preferably about 50 weight percent or less) polycarbonate, a styrene containing polymer, and an impact modifier. The cover layer preferably includes a polyurethane, a polyurea, or both. The substrate preferably forms a durable bond to the cover layer that maintains adhesion even after aging (e.g., heat, thermal cycling, UV light, visible light, humidity, climate aging, or any combination thereof).

The invention relates to expandable polymer particles with a content of recycled material based on styrene polymers, to a method for producing same, and to the use of the expandable polymer particles in a molded foam part. The expandable polymer particles contain 10 to 99 wt. %, based on the total weight, of at least one recycled material (A), which comprises at least one styrene polymer (A-1) and which largely consists of styrene polymers. 1 to 10 wt. %, based on the total weight, of at least one propellant (C), and optionally at least one primary polymer (B), at least one nucleating agent (D), and/or at least one additive (E).