3d-printed pla articles
A 3D printing and product technology, applied in the direction of processing and manufacturing, ink, additive processing, etc.
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Embodiment
[0234] All percentages in the following examples and throughout the specification are by weight unless otherwise stated.
[0235] experiment method
[0236] In the examples, glass transition temperature (Tg) was measured with a Perkin-Elmer Pyris Diamond differential scanning calorimeter (DSC) calibrated with indium as a standard. The sample was heated at a rate of 20°C / min from -50°C to 220°C, followed by a 3-minute isothermal, and a subsequent cooling scan at a rate of 20°C / min to -50°C, followed by a 3-minute isothermal, and then 20°C / min reheat to 220°C.
[0237] Modulus and tensile properties were measured as described in ISO 527 / 1 BA by performing tests at 50 mm / min and at 23°C.
[0238] The unnotched Izod impact strength is measured according to ISO 180 and the notched Izod impact strength is measured according to ISO 180 / A.
[0239] Stretch and deformation on 3D printed cubes are measured according to ISO 527 by cutting 1BA tensile dumbbells in the walls of the cu...
Embodiment 1
[0243] A 3D printable composition was prepared by mixing amorphous PLLA (Ingeo TM Biopolymer 4043D, which has a D isomer content of 4% by weight as measured by NMR) with a random terpolymer as ethylene, acrylate and glycidyl methacrylate AX8900 (poly(ethylene-co-methyl acrylate-co-glycidyl methacrylate) blend. Ingeo TM The physical properties of Biopolymer 4043D are shown in Table 1 and Those of AX8900 are shown in Table 2.
[0244] Table 1
[0245]
[0246] Table 2
[0247]
[0248] 3D printable compositions 1-3 were prepared as follows: PLA pellets as described above were combined with AX8900 was compounded in a twin screw extruder and extruded as strands. The temperature profile along the extruder barrel was 190-200°C and the temperature at the die was 200°C. The screw speed is 13rpm and the torque is <50Nm. The strands are cooled in an air cooling tunnel to avoid water absorption. They were dry granulated and the granules were re-dried until they reached l...
Embodiment 2
[0258] In this example, a 3D printable composition was prepared by mixing amorphous PLLA (Ingeo TM Biopolymer 4060D, which has a D isomer content of 11% by weight as measured by NMR) with a random terpolymer as ethylene, acrylate and glycidyl methacrylate AX8900 blend. Ingeo TM The physical properties of Biopolymer 4060D are shown in Table 5.
[0259] table 5
[0260]
[0261] PLLA 4060D was manufactured according to Example 1 and Blends of AX8900 in the form of pellets, filaments and double walled cubes. An overview of the prepared blends is given in Table 6 along with their physical and mechanical properties. The adhesion between layers measured for the 3D printed cube is also given.
[0262] Table 6
[0263]
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