Thermoplastic cellulose and aliphatic copolyester blend 3D printed wire and preparation method

An aliphatic copolyester, 3D printing technology, applied in additive processing and other directions, can solve the problems of low melt viscosity and high melt viscosity

Active Publication Date: 2018-03-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] One of the technical problems solved by the present invention is that the melt viscosity of thermoplastic cellulose and aliphatic copolyester blends in the prior art is too high to be applied to the field requiring low melt viscosity. Modified thermoplastic cellulose and aliphatic copolyester blend 3D printing filament, the 3D printing filament uses the blend material to effectively reduce the viscosity of the blend to "unexpectedly" lower than that of thermoplastic The blending addition theoretical viscosity of cellulose and aliphatic copolyester starting materials; enables the blend to have the processability to be prepared into 3D printing filament at a lower temperature, which is better than similar blends of the prior art , and due to the low melt viscosity of the blend, it can be more energy-efficient during processing

Method used

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  • Thermoplastic cellulose and aliphatic copolyester blend 3D printed wire and preparation method
  • Thermoplastic cellulose and aliphatic copolyester blend 3D printed wire and preparation method
  • Thermoplastic cellulose and aliphatic copolyester blend 3D printed wire and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] MD 3001PBSA and Eastman TM CAB-381-0.5 in the PolyLab HAAKE mentioned above TM Rheomex OS PTW16 co-rotating twin-screw extruder melt blend extrusion pelletizing. In the first stage of the extruder, the calibrated volumetric particle feeder is used for Feeding of MD 3001PBSA particles at a rate of 1680g / hr and a calibrated volumetric powder feeder was used for Eastman TM Feeding rate of CAB-381-0.5 powder: 420g / hr. The temperatures of the 2-11 sections of the extruder are: 140°C, 150°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C and 160°C, the screw speed is set at 200rpm, the torque at 48-52%. The extruder is equipped with a circular die with a diameter of 3 mm. After the splines are extruded from the die and cooled in a water bath, they are cut into cylindrical particles of about 3 mm by a pelletizer. The particles were collected, and after being pumped in a vacuum drying oven at 60°C for 4 hr, they were packaged for later use. The melt index of the part...

Embodiment 2

[0103] MD 3001PBSA and Eastman TM CAB-381-0.5 in the PolyLab HAAKE mentioned above TM Rheomex OS PTW16 co-rotating twin-screw extruder melt blend extrusion pelletizing. In the first stage of the extruder, the calibrated volumetric particle feeder is used for Feeding of MD 3001PBSA particles at a rate of 1365g / hr and a calibrated volumetric powder feeder was used for Eastman TM Feeding rate of CAB-381-0.5 powder: 735g / hr. The temperatures of the 2-11 sections of the extruder are: 140°C, 150°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C and 160°C, the screw speed is set at 200rpm, the torque at 43-47%. The extruder is equipped with a circular die with a diameter of 3 mm. After the splines are extruded from the die and cooled in a water bath, they are cut into cylindrical particles of about 3 mm by a pelletizer. The particles were collected, and after being pumped in a vacuum drying oven at 60°C for 4 hr, they were packaged for later use. The melt index of the part...

Embodiment 3

[0105] MD 3001PBSA and Eastman TM CAB-381-0.5 in the PolyLabHAAKE mentioned above TM Rheomex OS PTW16 co-rotating twin-screw extruder melt blend extrusion pelletizing. In the first stage of the extruder, the calibrated volumetric particle feeder is used for Feeding of MD 3001PBSA particles at a rate of 1050g / hr, while a calibrated volumetric powder feeder was used for Eastman TM Feeding rate of CAB-381-0.5 powder: 1050g / hr. The temperatures of the 2-11 sections of the extruder are: 140°C, 150°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C, 160°C and 160°C, the screw speed is set at 200rpm, the torque at 41-43%. The extruder is equipped with a circular die with a diameter of 3 mm. After the splines are extruded from the die and cooled in a water bath, they are cut into cylindrical particles of about 3 mm by a pelletizer. The particles were collected, and after being pumped in a vacuum drying oven at 60°C for 4 hr, they were packaged for later use. The melt index of the ...

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Abstract

The invention relates to a thermoplastic cellulose and aliphatic copolyester blend 3D printed wire, and mainly solves the problems in the prior art that thermoplastic cellulose is difficultly appliedto 3D printing field because of high viscosity of the thermoplastic cellulose during low-temperature processing and poor toughness of a product. According to the technical scheme, a blend consisting of 20% to 80% by mass of thermoplastic cellulose and 80% to 20% by mass of an aliphatic copolyester is employed and is prepared by a continuous melt-extrusion blending process. The melt viscosity of the blend is at least about 30% lower than a blending addition theoretical value of the two starting materials under a low shear rate condition, and is at least 30% lower than the blending addition theoretical value of the two starting materials under a high shear rate condition. The technical scheme solves the above problem better and can be used in industrial production of thermoplastic celluloseand aliphatic copolyester blend 3D printed wires.

Description

technical field [0001] The invention belongs to the field of blend materials of thermoplastic cellulose and aliphatic copolyester, and specifically relates to a blend of thermoplastic cellulose and aliphatic copolyester 3D printing filament with special rheological properties. A method for preparing 3D printing filaments of thermoplastic cellulose and aliphatic copolyester blends with special rheological properties is also discussed. technical background [0002] Cellulose is the most abundant organic polymer on earth, and it is also the most renewable biomass material every year. Cellulose is the structural material in the cell walls of green plants, woody plants contain about 30-40% cellulose, and cotton fibers contain about 90% cellulose. The main industrial uses of cellulose are paper and paperboard, and a small amount of cellulose is used to prepare regenerated cellulose such as cellophane, viscose (Rayon), and some cellulose derivatives. [0003] Because cellulose is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L1/14C08L67/04B29C47/92B33Y70/00B29C48/92
CPCB29C48/92B29C2948/92514B29C2948/92704B33Y70/00C08L1/14C08L67/02C08L67/04
Inventor 詹姆斯·洪学·王周炳况军白瑜王巍
Owner CHINA PETROLEUM & CHEM CORP
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