Provided are an irreversibly discoloring pigment for preventing overheating, a thermochromic molded article including the same, and a method of preparing the same, and more particularly, a discoloring pigment which becomes discolored when overheated, and then maintains the discoloration even after being cooled to room temperature, a thermochromic molded article including the discoloring pigment, and methods of preparing the discoloring pigment and the thermochromic molded article.

The present disclosure relates to a facility for forming a wood plastic composite by mixing and extruding wood powder and a polymer resin. According to a facility of the present disclosure, in a process of forming a wood plastic composite, gas and water vapor contained in wood powder and polymer resin are efficiently removed, and thus, a coupling force between wood powder and polymer resin increases, and also, wood powder is uniformly dispersed inside polymer resin, and thus, physical properties of a wood plastic composite to be formed is not degraded, and in addition, since there is no stagnant section while molten liquid of wood powder and polymer resin passes through each apparatus in the facility, wood powder is prevented from carbonizing or polymer resin is prevented from solidifying, and thus, physical properties of the wood plastic composite to be formed are maintained constant.

Die and counter-die systems, polymeric rule dies for such systems, and polymeric formulations suitable for producing such rule dies using digital rule writing. There is provided a rule die for pressure-contacting of a cardboard workpiece surface, including: (a) a die body; and (b) at least one elongate polymeric rule, each rule having: (i) a first elongate base surface adhesively attached to a surface of the die body; and (ii) an elongate protrusion, distally protruding from the die body, the elongate protrusion having an elongate die surface, the elongate die surface including a polymeric material, the elongate die surface having a contact surface adapted to contact the workpiece surface; the contact surface having a length of at least 5 mm and a first width (W) within a range of 0.4 to 1.0 mm, the rule having a height (H) within a range of 1.0 to 4.5 mm; wherein, over a total length of the contact surface, the contact surface having at most 5 surface pocks/meter, the pocks having a diameter above 0.1 mm.

Die and counter-die systems, polymeric rule dies for such systems, and polymeric formulations suitable for producing such rule dies using digital rule writing. There is provided a rule die for pressure-contacting of a cardboard workpiece surface, including: (a) a die body; and (b) at least one elongate polymeric rule, each rule having: (i) a first elongate base surface adhesively attached to a surface of the die body; and (ii) an elongate protrusion, distally protruding from the die body, the elongate protrusion having an elongate die surface, the elongate die surface including a polymeric material, the elongate die surface having a contact surface adapted to contact the workpiece surface; the contact surface having a length of at least 5 mm and a first width (W) within a range of 0.4 to 1.0 mm, the rule having a height (H) within a range of 1.0 to 4.5 mm; wherein, over a total length of the contact surface, the contact surface having at most 5 surface pocks/meter, the pocks having a diameter above 0.1 mm.

An article comprising: a carrier (12), activatable material (14) disposed on the carrier, one or more carrier extensions (16) extending from the carrier; wherein the article is adapted to provide sealing, baffling, or reinforcement within a structure's cavity.

A process for continuously preparing a polyolefin composition made from or containing a polyolefin and carbon black in an extruder device. The process includes the steps of supplying polyolefin in form of a polyolefin powder and carbon black to a mixing device; alternatively, (a) measuring the flow rate of the polyolefin powder supplied to the mixing device or (b) measuring the flow rate of the polyolefin pellets prepared in the extruder device; adjusting the flow rate of the carbon black to the mixing device in response to the measured flow rate of the polyolefin powder or adjusting the flow rate of the polyolefin powder to the mixing device in response to the measured flow rate of the polyolefin pellets; melting and homogenizing the mixture within the extruder device; and pelletizing the polyolefin composition into the polyolefin pellets.

A conveyance portion, a barrier portion, and a path are provided at places of a portion of a screw main body in which a kneading portion is provided. In at least one of the places, an entrance is opened to cause raw materials, conveyance of which is limited by a barrier portion to increase pressure on the raw materials, to flow in. The raw materials flowing in from the entrance flow through the path in the opposite direction to a conveyance direction of the conveyance portion. An exit is opened in an outer circumferential surface of the screw main body at a position outside the conveyance portion in which the entrance is opened.

An extrusion system (10) is provided that has first and second extruders (12,14) with first and second extrusion barrels (50,52). First and second extruded components (24,26) are transferred through the barrels (50,52) to a die (22) to coextrude tire tread (20) from the first and second extruded components (24,26). A horizontal plane (70) is located above ground in a vertical direction (40) and extends through both the first extrusion barrel (50) and the second extrusion barrel (52).

A screw machine includes an inductive heating device for processing of material to be processed. The inductive heating device is used to heat the material in a heating zone. In the heating zone, at least one housing portion is made of an electromagnetically transparent material at least partly, the material being non-magnetic and electrically non-conductive, whereas at least one treatment element shaft is made of an electrically conductive material at least partly. The inductive heating device includes at least one coil formed integrally with a component of the at least one housing portion, in particular in such a way as to form a hybrid component. During the processing of the material, the inductive heating device generates an alternating magnetic field that produces eddy current losses in the at least one treatment element shaft, the eddy current losses leading to a temperature increase of the at least one treatment element shaft.

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.