A composite material for additive manufacturing of a three-dimensional composite product

• Main Authors: SAARIKOSKI EVE, KOSONEN HARRI, NURMINEN ARI, KINNUNEN ARI P
• Format: Patent
• Language: Chinese; English
• Published: 29.12.2017
• 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; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; PERFORMING OPERATIONS; SPINNING; TEXTILES; TRANSPORTING

The invention relates to a composite material filament having rheological characteristics suitable for use in additive manufacturing by extrusion, a method for manufacturing a three-dimensional composite product with an additive manufacturing system from a filament of such composite material, and to a three-dimensional composite product obtained by an additive manufacturing system using such composite material. The filament is formed of material comprising semi-crystalline polylactic acid and chemical pulp of wood-based cellulose fibres, wherein the amount of chemical pulp of wood-based cellulose fibres is selected such that sufficient complex viscosity is obtained at melt state, such that upon additive manufacturing by extrusion, composite melt formed of the filament has a ratio of shear storage modulus to shear loss modulus G'/G" equal to or higher than 1.0 at a temperature equal to or higher than 133 DEG C. 本发明涉及具有适用于挤出增材制造的流变特性的复合材料纤丝，种采用增材制造系统由这种复合材料纤丝制备三维复合产品的方法以及种通过使用该复合材料的增材制造系统得到的三维复合产品。所述纤丝由包含半结晶聚乳酸