A manufacturing method of a polylactic acid molded article includes implementing a granulating step and a forming step. The granulating step includes: mixing a polylactic acid material, a polylactic acid recovery material having a weight average molecular weight less than that of the polylactic acid material, and a crystallizing agent in an environment of 180 to 250; carrying out a first molecular chains recombination of the polylactic acid material and the polylactic acid recovery material; and forming a polylactic acid composition after granulation. The forming step includes: filling the polylactic acid composition into a mold with an injection molding machine; carrying out a second molecular chains recombination of the polylactic acid composition in the mold; and forming the polylactic acid molded article after curation. The present disclosure also provides a polylactic acid composition.

A manufacturing method of a polylactic acid molded article includes implementing a granulating step and a forming step. The granulating step includes: mixing a polylactic acid material, a polylactic acid recovery material having a weight average molecular weight less than that of the polylactic acid material, and a crystallizing agent in an environment of 180 to 250; carrying out a first molecular chains recombination of the polylactic acid material and the polylactic acid recovery material; and forming a polylactic acid composition after granulation. The forming step includes: filling the polylactic acid composition into a mold with an injection molding machine; carrying out a second molecular chains recombination of the polylactic acid composition in the mold; and forming the polylactic acid molded article after curation. The present disclosure also provides a polylactic acid composition.

An environment-friendly material includes 50 wt % to 70 wt % of inorganic mineral powder, 20 wt % to 45 wt % of polyolefin, and 5 wt % to 15 wt % of auxiliary agent. The inorganic mineral powder contains calcium carbonate; the polyolefin may be linear low density polyethylene, low density polyethylene, medium density polyethylene, high density polyethylene, or polypropylene; and the auxiliary agent may be polyolefin elastomer, maleic anhydride grafted polyolefin elastomer, or maleic anhydride grafted polyethylene. The disclosure also provides a manufacturing method of window covering slat using the environment-friendly material and a window covering slat manufactured by the method.

A method of producing granular excreta treating material utilizes an extrusion type compressive granulating apparatus configured to produce granular excreta treating material that has an absorbing property and is formed by extruding and granulating a raw material via a granulating hole of the apparatus. The granulating hole includes a small diameter hole and a large diameter hole which are continuous to each other in the axial direction of the hole, in which the small diameter hole forms a compression zone, and the large diameter hole forms a non-compression zone, and in which the raw material is compressed at the compression zone, swells at the non-compression zone, and is cut into granules by a cutting blade rotating along an outlet surface of the non-compression zone.

A polyethylene powder, wherein the specific surface area as determined by the BET method is 0.20 m.sup.2/g or larger and 0.80 m.sup.2/g or smaller, the pore volume as determined by mercury penetration method is 0.95 mL/g or smaller, the full width at half maximum of a melting endothermic peak in differential scanning calorimetry is 6.00 C. or smaller, the viscosity-average molecular weight is 100000 or higher and 10000000 or lower, and the average particle size is 100 m or larger and 300 m or smaller.

A polyethylene powder, wherein the specific surface area as determined by the BET method is 0.20 m.sup.2/g or larger and 0.80 m.sup.2/g or smaller, the pore volume as determined by mercury penetration method is 0.95 mL/g or smaller, the full width at half maximum of a melting endothermic peak in differential scanning calorimetry is 6.00 C. or smaller, the viscosity-average molecular weight is 100000 or higher and 10000000 or lower, and the average particle size is 100 m or larger and 300 m or smaller.

The present invention relates to a lighting system for analyzing pellet and a foreign matter sorting apparatus comprising same. The lighting system for analyzing pellet comprises: a casing (100) which has an inner space and a through-hole (110) formed in the upper surface, and in which objects to be sorted (P), including a plurality of pellets, move across the inner upper portion and the inner lower portion; an upper lighting assembly (200) which includes a plurality of first light sources (210) each irradiating first illumination light, and a first light source holder (220) which fixes the first light sources (210) so that a row direction light source array, in which some of the first light sources (210) are arranged in the lengthwise direction of a virtual curved surface, is arranged in parallel along the arc direction of the virtual curved surface, wherein the virtual curved surface, of which the arc direction is the vertical direction, is convex toward the objects to be sorted (P), and the upper lighting assembly (200) is arranged on the inner upper portion of the casing 100 and irradiates the first illumination light toward the upper and side portions of the objects to be sorted (P); and a lower lighting assembly (300) comprising a plurality of second light sources (310) each irradiating second illumination light, and a second light source holder (320) which fixes the plurality of second light sources (310), wherein the lower lighting assembly (300) is arranged on the inner lower portion of the casing (100) and irradiates the second illumination light toward the lower and side portions of the objects to be sorted (P).

A method of producing polymer particles includes, in a system in which a polymer A and a polymer B are dissolved in and mixed with an organic solvent to undergo phase separation into two phases which are a solution phase containing the polymer A as a major component and a solution phase containing the polymer B as a major component, continuously adding an emulsion including the polymer A, the polymer B and the organic solvent, and a poor solvent for the polymer A to a vessel continuously to allow the polymer A to precipitate; and separating polymer A particles from the vessel continuously.

A method of producing polymer particles includes, in a system in which a polymer A and a polymer B are dissolved in and mixed with an organic solvent to undergo phase separation into two phases which are a solution phase containing the polymer A as a major component and a solution phase containing the polymer B as a major component, continuously adding an emulsion including the polymer A, the polymer B and the organic solvent, and a poor solvent for the polymer A to a vessel continuously to allow the polymer A to precipitate; and separating polymer A particles from the vessel continuously.

The present invention relates to a method of producing a direct compression tablet composition comprising the step of processing ibuprofen, a hydrophilic polymer, and an inorganic excipient by an extrusion process to produce an extruded composition in which the ibuprofen forms a solid dispersion/solution within the hydrophilic polymer. The invention is particularly useful in preparing oral dissolvable tablets. Also provided are composition comprising an inorganic excipient and ibuprofen within a hydrophilic polymer.