MANUFACTURING METHOD OF PLA FILAMENT FOR 3D PRINT AND PLA FILAMENT MANUFACTURED THEREBY

摘要

The present invention relates to a method for manufacturing a flame-retardant and heat-resistant PLA filament for a 3D printer using a microcapsule and to a PLA filament manufactured thereby, wherein the flame retardance and heat resistance of PLA are improved and the functions of a core material used for the melamine microcapsule are realized using a melamine microcapsule having a core-covering wall material composed of a melamine resin. The present invention provides a method for manufacturing a flame-retardant and heat-resistant PLA filament for a 3D printer using a microcapsule which comprises the steps of: producing a functional masterbatch by extruding the melamine microcapsule having the melamine resin used as the core-covering wall material and a biodegradable resin with a low melting point; and producing a PLA filament by mixing and extruding the functional masterbatch and PLA, wherein the biodegradable resin with a low melting point has a melting point lower than that of the PLA; and a PLA filament manufactured thereby. [Reference numerals] (AA) Prepare a melamine microcapsule (particle size: 5 to 10 쨉m); (BB) Melamine micro capsule (60 to 70%) + Low melting point biodegradable resin (30 to 40%); (CC) Extrusion ( the temperature of a screw: 120 to 150C); (DD) Functional masterbatch (30 to 50%) + PLA (50 to 70%); (EE) Extrusion spinning (the temperature of the screw: 170 to 190C); (FF) Bobbin winding; (GG) Core material : aroma oil, a thermochromic pigment and a photochromic pigment; (HH) Wall material : a melamine resin; (II) Manufacture of the functional masterbatch