B29C67/24

Manufacture of three dimensional objects from thermosets

A method for creating a three dimensional (3D) object from reactive components that form a thermoset product. In one embodiment, a method includes providing first and second reactive components that are effective to form the thermoset product. In one embodiment, the thermoset product includes a urethane and/or urea-containing polymer. In one embodiment, the first reactive component includes an isocyanate and the second reactive component includes a polyol having at least one terminal hydroxyl group, a polyamine having at least one amine that includes an isocyanate reactive hydrogen, or a combination of the polyol and the polyamine. In one embodiment, the first reactive component includes a prepolymer, and optionally the ratio of viscosity of the first and second reactive components is from 1:3 to 3:1. Also provided is a 3D object that includes a completely reacted thermoset product, and a thermoset system that includes a first and a second reactive component.

"Polyurethane Article and Methods of Making the Same"
20210253779 · 2021-08-19 ·

Articles are provided including at least one polyurethane prepared from: (a) about 1 equivalent of at least one polyisocyanate; (b) about 0.005 to about 0.35 equivalent of at least one polycaprolactone polyol; (c) about 0.01 to about 1.0 equivalent of at least one polyol selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,2-ethanediol, propanediol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, nonanediol, decanediol, dodecane diol, octadecanediol, cyclopentanediol, 1,4-cyclohexanediol, cyclohexanedimethanol, 1,4-benzenedimethanol, xylene glycol, hydroxybenzyl alcohol, dihydroxytoluene, bis(2-hydroxyethyl) terephthalate, 1,4-bis(hydroxyethyl)piperazine, N,N′,bis(2-hydroxyethyl)oxamide and mixtures thereof; and (d) about 0.01 to about 0.5 equivalent of at least one polyol selected from the group consisting of glycerol, tetramethylolmethane, trimethylolethane, trimethylolpropane, erythritol, pentaerythritol, dipentaerythritol, tripentaerythritol, sorbitan, and mixtures thereof, each based upon the about 1 equivalent of the at least one polyisocyanate, wherein the article has a Gardner Impact strength of at least about 400 in-lb according to ASTM D-5420-04.

Method of forming electrically and thermally conductive polyolefin-perovskite nanomaterial composites having increased dielectric permittivity and breakdown-induced electrical and thermal conduction pathways

A method of forming a polyolefin-perovskite nanomaterial composite which contains oriented electrically and thermally conductive pathways. The method involves milling a polyolefin with particles of a perovskite nanomaterial, molding to forma composite plate, and subjecting the composite plate to an AC voltage. The AC voltage forms oriented electrically and thermally conductive pathways by partial dielectric breakdown of the composite. The presence of the oriented electrically and thermally conductive pathways gives the polyolefin-perovskite nanomaterial electrical and thermal conductivity and dielectric permittivity higher than the polyolefin alone.

Apparatus for manufacturing slabs with veined effect
11045973 · 2021-06-29 ·

During the manufacture of slabs with a veined effect a liquid or powder colouring agent is deposited on the surface of a thin layer of starting mixture by means of at least one dispensing device and the resultant mixture is supplied, falling freely, from one end of an extractor belt forming the bottom of a mixture metering/distributor unit, following which the mixture is transferred, falling freely, onto a temporary moulding support. This results in the production of slabs provided with veining extending through the entire thickness of the slabs and also visible along the whole edge of the slab, even after it has been machined.

Processes for In-Mold coating systems for molding, and products formed therefrom

Disclosed are processes for In-Mold coating of a substrate. The processes include: introducing a curable composition to a mixhead at a first elevated pressure, the curable composition comprising a first polymeric component and a second polymeric component, the introducing of the curable composition to the mixhead comprising mixing the first and second polymeric components by impingement to form an intermediate composition; introducing the intermediate composition to a secondary mixer, the introducing of the intermediate composition to the secondary mixer comprising mixing the intermediate composition to form a coating composition; and introducing the coating composition into a mold containing a substrate to form a curable coating on a surface of the substrate.

Curved slab surfaces, systems, and methods

Systems and methods of thermoforming stone slabs are provided, such as by heating a stone slab while forming it to a mold. Curved stone slabs may be produced having low radii of curvature.

Process of Making A Gluten-based Biodegradable Material
20210283862 · 2021-09-16 ·

The present invention is directed to a fully biodegradable material based on a plant protein. The present invention is also directed to a process method of making a gluten-based biodegradable material by a water induced flocculation step. A fully hydrated gluten dough with or without an additive or/and a filler formed from the flocculation step, which has low viscoelasticity, is further molded into an article with desired shapes under a low shear stress in a relatively low temperature range. A rigid or flexible biodegradable plastic article is obtained by removing extra water at a temperature lower than decomposition temperature of the gluten.

Process of Making A Gluten-based Biodegradable Material
20210283862 · 2021-09-16 ·

The present invention is directed to a fully biodegradable material based on a plant protein. The present invention is also directed to a process method of making a gluten-based biodegradable material by a water induced flocculation step. A fully hydrated gluten dough with or without an additive or/and a filler formed from the flocculation step, which has low viscoelasticity, is further molded into an article with desired shapes under a low shear stress in a relatively low temperature range. A rigid or flexible biodegradable plastic article is obtained by removing extra water at a temperature lower than decomposition temperature of the gluten.

Injection moulding machine having a coating installation

The invention relates to an injection moulding machine having a coating installation, wherein the injection moulding machine has at least one fixed platen and one movable platen for the fastening of mould tool halves of at least one mould tool, and the coating installation has first pressure-generating and/or first pressure-conducting means for coating components at a first, relatively low pressure level and second pressure-generating and/or second pressure-conducting means for the coating components at a second, relatively high pressure level, wherein at least all second pressure-generating and all second pressure-conducting means are coupled to the movable platen so as to be jointly movable along a movement path of the movable platen.

Continuous pull three-dimensional printing

Described herein are three-dimensional (3D) printer systems and methods, which may provide for “continuous pull” 3D printing. An illustrative 3D printer includes: a resin container, a base plate, a light source arranged below the resin container and operable to cure resin in the resin container; and a control system operable to: (a) receive model data specifying a 3D structure; (b) determine 2D images corresponding to layers of the 3D object; and (c) generate control signals to operate the light source and the base plate to sequentially form the layers of the 3D object onto the base plate, wherein the base plate moves a formed portion of the 3D object upward after formation of each layer, and wherein at least a surface of a formed portion of the 3D object remains in contact with the resin in the resin container throughout the formation of the layers of the 3D object.