Polymer filaments with reduced emissions for additive manufacturing

• Main Authors: VAN DE WINKEL, JAN, WINTERS JUSTIN, MELCONDETTI, MAURO, SCHNUUCH, ACHIM
• Format: Patent
• Language: Chinese; English
• Published: 06.12.2022
• 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 polymer filament with reduced emissions for additive manufacturing. The present invention provides a composition comprising a polymer filament compatible with fuse fabrication, comprising: a thermoplastic polymer; and a bio-based additive in an effective amount with the thermoplastic polymer to reduce total volatile organic compound (TVOC) emissions by at least about 10% by weight under additive manufacturing conditions, as determined by gas chromatograph and measured separately relative to the thermoplastic polymer. A method for forming a polymer filament compatible with fuse manufacturing can include: forming a melt blend comprising a thermoplastic polymer and a bio-based additive; and extruding the melt blend and cooling to form a polymer filament comprising the bio-based additive mixed with the thermoplastic polymer. The bio-based additive is present in an effective amount to reduce total volatile organic compound (TVOC) emissions by at least about 10% by weight under additive m