Disclosed are embodiments of a three-dimensional (3D) printer for building 3D objects with layer based, additive manufacturing techniques. The hot end can be moved in a horizontal plane parallel a planar printing surface of the printing bed while the printing bed can be moved perpendicular to the planar printing surface to print a 3D object. The hot end can be part of an extrusion guide assembly. The 3D printer can auto-level the printing bed.

An injection molded article comprising a thin-walled body portion formed from a polymer-based resin derived from cellulose, wherein the thin-walled body portion comprises: i. a gate position; ii. a last fill position; iii. a flow length to wall thickness ratio greater than or equal to 100, wherein the flow length is measured from the gate position to the last fill position; and iv. a wall thickness less than or equal to about 2 mm; and wherein the polymer-based resin has an HDT or at least 95 C., a bio-derived content of at least 20 wt %, and a spiral flow length of at least 3.0 cm, when the polymer-based resin is molded with a spiral flow mold with the conditions of a barrel temperature of 238 C., a melt temperature of 246 C., a molding pressure of 13.8 MPa, a mold thickness of 0.8 mm, and a mold width of 12.7 mm.

A polyester film and a method for producing the same are provided. The polyester film includes a heat resistant layer. The heat resistant layer includes a high temperature resistant resin material and a polyester resin material. The high temperature resistant resin material and the polyester resin material are melted and kneaded with each other via a twin screw granulator. The twin-screw granulator has a twin-screw temperature between 250 C. and 320 C., and the twin-screw granulator has a twin-screw rotation speed between 300 rpm and 800 rpm, so that the high temperature resistant resin material is dispersed in the polyester resin material with a particle size of between 50 nm and 200 nm.

The invention relates to an additive manufacturing process (3D printing) using particles having a meltable polymer. The meltable polymer comprises a thermoplastic polyurethane polymer which has a melting range (DSC, Differential Scanning calorimetry; second heating at heating rate 5 K/min) of 160 to 270 C. and a Shore D hardness according to DIN ISO 7619-1 of 50 or more and which, at a temperature T, has a melt volume rate (melt volume rate (MVR)) according to ISO 1133 of 5 to 15 cm/10 min and a change of the MVR, when this temperature T increases by 20 C., of greater than or equal to 90 cm.sup.3/10 min. The invention also relates to an item which can be obtained by means of the method.

The invention relates to an additive manufacturing process (3D printing) using particles having a meltable polymer. The meltable polymer comprises a thermoplastic polyurethane polymer which has a flowing temperature (intersection of E and E in the DMA) of 80 C. to <180 C. and a Shore A hardness according to DIN ISO 7619-1 of 50 Shore A and <85 Shore A and which, at a temperature T, has a melt volume rate (melt volume rate (MVR)) according to ISO 1133 of 5 to <15 cm.sup.3/10 min. The invention also relates to an item which can be obtained by means of the method.

Multilayer cast films with an ethylene/-olefin copolymer core layer, and inner and outer layers containing low density polyethylene homopolymers, and multilayer cast films with an ethylene polymer core layer, and inner and outer layers containing ethylene/-olefin copolymers, are described. These cast films have a reduced tendency to block, and are useful in various food packaging applications.

Injection molded articles having improved scratch resistance and reduced gloss change after heat and UV aging are disclosed. The article is formed from a molding composition having a melt flow index of 50-350 g/10 (230 C., 2.16 kg) as measured by ASTM D1238-04, the composition consisting essentially of: a) 15-80 wt. % of a hydrogenated styrenic block copolymer having a melt index of at least 12 grams/10 minutes according to ASTM D1238 at 230 C. and 2.16 kg weight; b) 10-60 wt. % of a polypropylene having a melt flow index greater than 300 g/10 min, measured under 230 C./2.16 kg according to ISO 1133-1; and c) 5-25 wt. % of a thermoplastic vulcanizate having a Shore A hardness from 60-90 (15 sec, 23 C.) as measured according to ISO 868. The article has a gloss increase after 10 days of aging at 120 C. of less than 100%, relative to an initial gloss, as determined by PSA D47 1850.

External thermal insulation composite systems described herein include a concrete or masonry wall and a multilayer thermal insulation board disposed on the concrete or masonry wall. The multilayer thermal insulation board includes at least one closed cell foam layer comprising polyurethane and polyisocyanurate having an open cell volume of less than 20% by volume according to ASTM D 6226 and at least one open cell foam layer comprising polyurethane and polyisocyanurate having an open cell volume of greater than 80% by volume according to ASTM D 6226.

The invention relates to an additive manufacturing process (3D printing) using particles having a meltable polymer. The meltable polymer comprises a thermoplastic polyurethane polymer which has a melting range (DSC, Differential Scanning calorimetry; second heating at heating rate 5 K/min) of 160 to 270 C. and a Shore D hardness according to DIN ISO 7619-1 of 50 or more and which, at a temperature T, has a melt volume rate (melt volume rate (MVR)) according to ISO 1133 of 5 to 15 cm/10 min and a change of the MVR, when this temperature T increases by 20 C., of greater than or equal to 90 cm.sup.3/10 min. The invention also relates to an item which can be obtained by means of the method.

The invention relates to an additive manufacturing process (3D printing) using particles having a meltable polymer. The meltable polymer comprises a thermoplastic polyurethane polymer which has a flowing temperature (intersection of E and E in the DMA) of 80 C. to <180 C. and a Shore A hardness according to DIN ISO 7619-1 of 50 Shore A and <85 Shore A and which, at a temperature T, has a melt volume rate (melt volume rate (MVR)) according to ISO 1133 of 5 to <15 cm.sup.3/10 min. The invention also relates to an item which can be obtained by means of the method.