A build material for additive manufacturing applications is disclosed. The build material includes a build composition in powder form. The build composition includes a semi-crystalline polymer having a glass transition temperature of at least 60° C. as measured by DSC and a minimum crystallization half-time of greater than 100 minutes as measured by SALS. A semi-crystalline polymer useful in additive manufacturing applications, an additive manufacturing method for producing a three-dimensional object and an additive-manufactured polymer article are also described.

Disclosed is a real-time method for detecting copper and silver in water in parts per billion. Total silver is detected by adding a nitric acid solution to the sample; after the silver is digested, adding a buffer solution comprising water, sodium bicarbonate, sodium carbonate and EDTA to the sample; adding an indicator comprising Cadion 2B, EtOH, and Triton X-100 to the sample; then reading the absorbance of the sample after light with an approximate target peak of 515 nm is sent through the sample; and determining the silver concentration by comparing the absorbance of the sample to the absorbances of known silver standards. Total copper is detected by adding a nitric acid solution to the sample; after the copper is digested, adding a buffer/indicator solution to the sample, where the solution comprises water, sodium citrate dihydrate, hydroxal amine hydrochloride and bathocuproine disulfonate; after one minute, reading the absorbance of the sample after light with an approximate target peak of 480 nm is sent through the sample; and determining the copper concentration by comparing the absorbance of the sample to the absorbances of known copper standards. A monitoring device for determining the level of copper or silver in a sample implements the disclosed methods.

Described herein are methods, systems and apparatus (including associated control methods, systems and apparatus), for the production of a three-dimensional object by “bottom up” additive manufacturing, in which a carrier is vertically reciprocated with respect to a build surface, to enhance or speed the refilling of the build region with a solidifiable liquid. In preferred (but not necessarily limiting) embodiments, the three-dimensional object is produced from a liquid interface by continuous liquid interface production (i.e., “CLIP”).

An organic microgel system as support material for 3D printing of soft materials such as silicone and methods for manufacturing and using the organic microgel system are disclosed. In some embodiments, the organic microgel system comprises a plurality of microgel particles formed by blending a di-block copolymer and a tri-block copolymer in an organic solvent. The organic microgel system may allow high precision 3D printing of silicone objects with complex shapes.

Provided is an electrically conductive resin composition with which the characteristics inherent in a thermoplastic resin are easily retained and which exhibits more excellent electrical conductivity even if the blending amount of an electrically conductive filler is small. This electrically conductive resin composition contains a thermoplastic resin, such as a polycarbonate or a polyolefin, and an electrically conductive filler, such as a carbon nanotube. This electrically conductive resin composition further contains a dye, such as a perinone-based dye or a disazo-based dye, which is a component for improving electrical conductivity, and this electrically conductive resin composition can be obtained by kneading or molding a raw material mixture containing a thermoplastic resin, an electrically conductive filler, and a dye under a condition of a temperature equal to or higher than the melting point of the thermoplastic resin.

An extruded multilayer film includes a top layer comprising a blend of a polyolefin and adsorbent silica. The adsorbent silica is 5% or more of the blend and the polyolefin is 95% or less of the blend. The multilayer film is oriented in at least one direction to cause fracturing of the top layer to provide a microporous surface exposing the adsorbent silica gel. The fractured top layer is receptive to receiving a printing ink on an exposed surface thereof with enhanced pigment entrapment and rapid ink drying. A single layer film in the form of the top layer, and also oriented in at least one direction also constitutes a part of this invention.

Provided is a method of forming a three-dimensional object, which may include the steps of: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid that comprises a reactive blocked monomer and/or prepolymer comprising a self-polymerizing monomer and/or prepolymer blocked with a light-polymerizable blocking group; (c) irradiating the build region with light through said optically transparent member to form a solid polymer scaffold from the reactive blocked monomer and/or prepolymer and also advancing the carrier away from the build surface to form a three-dimensional intermediate; and then (d) heating and/or microwave irradiating, the three-dimensional intermediate sufficiently to degrade the scaffold and regenerate the monomer and/or prepolymer in de-blocked form, which monomer and/or prepolymer in turn self-polymerize, to form said three-dimensional object.

Textile compositions comprising at least one filamentous fungus are disclosed, as are methods for making and using such textile compositions. Embodiments of the textile compositions generally include at least one of a plasticizer, a polymer, and a crosslinker, in addition to the filamentous fungus. The disclosed textile compositions are particularly useful as analogs or substitutes for conventional textile compositions, including but not limited to leather.

Textile compositions comprising at least one filamentous fungus are disclosed, as are methods for making and using such textile compositions. Embodiments of the textile compositions generally include at least one of a plasticizer, a polymer, and a crosslinker, in addition to the filamentous fungus. The disclosed textile compositions are particularly useful as analogs or substitutes for conventional textile compositions, including but not limited to leather.

Disclosed are embodiments of a volume control storage bag and methods of making same. The volume control storage bag may have first and second sidewalls, a double-locking closure mechanism with a first closure element extending along the first sidewall and a second closure element extending along the second sidewall, each closure element having a channel and an elongated member configured for interlocking with one another. A gusset is sealed along three sides of the first and second sidewalls, leaving an opening through the closure mechanism and defining an interior space having a specific volume. Corner seals may be formed at the corners of the first and second sidewalls, further reinforcing the double-locking closure mechanism for an airtight and hence waterproof seal. The volume control storage bag may be made of a food-grade polyethylene vinyl acetate blend, approximately 90% or less ethylene vinyl acetate and approximately 10% or less polyethylene.