폴리머 분말 및 그 제조 방법, 그리고 3차원 조형물의제조 방법

• Main Authors: OKUNO YOTA, WATANABE KEI, ASANO ITARU, NAKAMURA TOMOHIKO, IWATA HIROKAZU, NISHIDA MIKIYA
• Format: Patent
• Language: Korean
• Published: 30.10.2023
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

폴리아미드로 구성되는 폴리머 분말이며, 시차 주사 열량 측정에 있어서 얻어지는 융점이 190℃ 이상이고, 시차 주사 열량 측정에 있어서 얻어지는 융점과 용융 개시 온도의 차가 30℃ 미만이고, D50 입자경이 1㎛ 이상 100㎛ 이하인 것을 특징으로 하는 폴리머 분말 및 그 제조 방법, 그리고 그것을 사용한 분말 베드 용융 결합 방식에 의한 3차원 조형물의 제조 방법. 본 발명의 폴리머 분말에서는, 대형의 조형 장치에 있어서도, 레이저 비조사부의 분말의 형태를 유지할 수 있다. 또한, 해당 폴리머 분말을 사용하여 조형물로 했을 때 휨이 작은 조형물을 제공할 수 있다. A polymer powder includes a polyamide, wherein a melting point determined in differential scanning calorimetry is 190° C. or higher, a difference between the melting point and a melting onset temperature, which is defined in differential scanning calorimetry as a lowest temperature among temperatures at each of which a first temperature differential value of Heat Flow (W/g) observed between a peak top temperature of an endothermic peak, observed when 10 mg of powder is heated at a rate of 20° C./min from 30° C. in a nitrogen atmosphere, and a temperature point of −50° C. from the peak top, becomes −0.2 (W/g.° C.), is less than 30° C., and a D50 particle size is 1 μm or more and 100 μm or less.