Copolymerization toughening modified material for 3D printing PLA (polylactic acid) and preparation method of copolymerization toughening modified material

A toughening modification and 3D printing technology, which is applied in the directions of additive processing, climate sustainability, sustainable manufacturing/processing, etc., can solve the problem that the long-term stability of toughening cannot be guaranteed, the printing process has poor fluency, PLA Poor toughness and other problems, to achieve the effect of good drawing effect, stable size, no warping and brittle fracture

Pending Publication Date: 2022-05-27
SHENZHEN ESUN IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent document CN105504729A discloses a polylactic acid modified material for 3D printing, which mainly uses a modified coupling agent masterbatch to solve the problems of poor toughness of PLA and poor fluency of the printing process
[0007] However, the above-mentioned PLA and TPU physically blended and toughened wires still cannot avoid serious wire drawing problems in the FDM 3D printing process, and the long-term stability of toughening is not guaranteed.

Method used

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  • Copolymerization toughening modified material for 3D printing PLA (polylactic acid) and preparation method of copolymerization toughening modified material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Take 85 parts of pre-dried PLA 4032D, 10 parts of TPU 1816, 0.5 part of BASF ADR4368CS, 0.1 part of diglycidyl ether, 0.25 part of lubricant stearic acid and polyethylene wax, 0.25 part of calcium zinc stabilizer, silane coupling 5 parts of talcum powder treated with the agent was put into a high-speed mixer and mixed for 15 minutes. After mixing evenly, it was melted and extruded by a twin-screw extruder, and water-cooled and pelletized. The processing temperature of the 8 zones of the twin-screw extruder was 160°C in turn. , 170℃, 180℃, 190℃, 200℃, 200℃, 200℃, 190℃, the screw speed is 170r / min, the feeding speed is 5.0r / min, and the main engine current is 13.8A.

[0037] The obtained modified particles were dried in a vacuum drying oven at 80°C for 4 hours, and the moisture content was measured to be less than 0.1%, taken out, poured into the hopper of a single-screw extruder, and melted and extruded into filaments with a diameter of 1.75 mm, wherein The processing tem...

Embodiment 2

[0039] Take 80 parts of pre-dried PLA 4043D, 15 parts of TPU 5887ARE, 1 part of PPGDGE, 0.2 part of 1,4-cyclohexanedimethanol diglycidyl ether, 1,4-cyclohexanedimethanol diglycidyl ether diacrylate 0.3 part of lubricant stearic acid and 0.25 part of silicone powder each, 0.25 part of lead salt stabilizer, 5 parts of calcium carbonate treated with silane coupling agent, put into a high-speed mixer and mixed for 15 minutes, mixed evenly and passed through a twin-screw The extruder is melt-blended and extruded, and water-cooled pelletizing. The processing temperature of the 8 zones of the twin-screw extruder is 160°C, 170°C, 180°C, 190°C, 200°C, 200°C, 200°C, and 190°C. The rotating speed is 180r / min, the feeding speed is 5.0r / min, and the main machine current is 13.5A.

[0040] The obtained modified particles were dried in a vacuum drying oven at 80°C for 4 hours, and the moisture content was measured to be less than 0.1%, taken out, poured into the hopper of a single-screw extr...

Embodiment 3

[0042] Take 75 parts of pre-dried PLA 510, 20 parts of TPU 1198ARE, 10.8 parts of bisphenol A epoxy resin E5, 0.3 part of ethylene glycol diglycidyl ether, 0.25 part of lubricant silicone powder and 0.25 part of polyethylene wax. Oxygen 1010 and 168 each 0.25 parts, 5 parts of wollastonite treated with silane coupling agent, put into a high-speed mixer and mixed for 15 minutes, after mixing evenly, melt-blending and extruding through a twin-screw extruder, water-cooled pelletizing, Among them, the processing temperature of the 8 zones of the twin-screw extruder is 160°C, 170°C, 180°C, 190°C, 200°C, 205°C, 200°C, 195°C, the screw speed is 200r / min, and the feeding speed is 6.0r / min. , the host current is 13.1A.

[0043] The obtained modified particles were dried in a vacuum drying oven at 80°C for 4 hours, and the moisture content was measured to be less than 0.1%, taken out, poured into the hopper of a single-screw extruder, and melted and extruded into filaments with a diamet...

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Abstract

The invention discloses a copolymerization toughening modified material for 3D printing PLA (polylactic acid) and a preparation method of the copolymerization toughening modified material. The material is prepared from the following components in parts by weight: 60 to 90 parts of polylactic acid, 10 to 40 parts of thermoplastic polyurethane elastomer, 0.5 to 5 parts of epoxy polymer, 0.1 to 0.5 part of diglycidyl ether derivative, 0.2 to 1 part of lubricant, 0.2 to 1 part of heat stabilizer and 1 to 10 parts of inorganic filler, the preparation method comprises the following steps: drying the components, uniformly mixing, and carrying out melt co-extrusion by using a double-screw extruder. According to the method, the problems of thermodynamic incompatibility and phase separation in the blending extrusion process of PLA and TPU are solved, the toughening effect has long-acting stability, and when the method is applied to 3D printing, wire output is smooth, and the wire drawing effect is good.

Description

technical field [0001] The invention relates to the technical field of polylactic acid modified materials, in particular to a copolymerization toughening modified material for 3D printing PLA and a preparation method thereof. Background technique [0002] PLA is a completely biodegradable green polymer material. It has the advantages of non-toxic and non-irritating odor, high mechanical strength, low melting temperature, small cooling shrinkage, transparent and easy to dye, and good molding performance. With the rapid development of the 3D printing industry, its role in 3D printing consumables is becoming more and more important, but at the same time, PLA has disadvantages such as poor molecular chain flexibility, low toughness, brittle fracture during deformation, and slow crystallization speed. , which seriously restricts the expansion of its application range. Therefore, in recent years, the research on the direction of PLA toughening and modification has gradually become...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L75/04C08L63/00C08K5/1515B33Y70/10
CPCC08L67/04B33Y70/10C08L75/04C08L63/00C08K5/1515Y02W90/10
Inventor 杨义浒刘浦陈锐吴泽李伟
Owner SHENZHEN ESUN IND
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