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Low-warpage PPR-based composite wire for 3D printing, and preparation method thereof

A 3D printing and 3D printer technology, applied in the field of 3D printing materials and their preparation, can solve the problems of insufficient types of 3D printing consumables, and achieve the effects of broadening the field of 3D printing materials, reducing warping deformation, and high mechanical strength

Inactive Publication Date: 2019-09-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of existing 3D printing consumables such as insufficient types, firstly provide a low-warp random copolymerized polypropylene (PPR)-based composite filament for 3D printing, the composite filament has high strength, High toughness and excellent 3D printing effect

Method used

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  • Low-warpage PPR-based composite wire for 3D printing, and preparation method thereof
  • Low-warpage PPR-based composite wire for 3D printing, and preparation method thereof
  • Low-warpage PPR-based composite wire for 3D printing, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 40 parts by mass of random copolymerized polypropylene, 29.9 parts of glass fiber, 30 parts of EPDM rubber and 0.1 part of antioxidant 1010 were put into a high-speed kneader and mixed for 5 minutes to obtain a premix; The mixed materials are put into the twin-screw extruder for blending and extrusion, and then cooled and pelletized to obtain composite material pellets. The processing temperature of the twin-screw extruder is divided into eight sections, which are successively set as: 160°C, 170°C, 180°C, 190°C, 190°C, 190°C, 190°C and 190°C, the head temperature is 190°C, the screw speed is 190r / min, and the feeding speed is 10r / min; Extrude, stretch, cool and wind in the extruder to obtain a PPR-based composite filament with a diameter of 1.75mm for 3D printing. The processing temperature of the consumable extruder is 180 from the hopper to the head. ℃, 210℃, 210℃ and 200℃, the extrusion speed is 700r / min, and the pulling speed is 80r / min.

[0031] The obtained PPR-b...

Embodiment 2

[0033]42.4 parts by mass of random copolymerized polypropylene, 45 parts of glass fiber, 12 parts of EPDM rubber and 0.6 part of antioxidant 1010 were put into a high-speed kneader and mixed for 10 minutes to obtain a premix; The mixed materials are put into the twin-screw extruder for blending and extrusion, and then cooled and pelletized to obtain composite material pellets. The processing temperature of the twin-screw extruder is divided into eight sections, which are successively set as: 160°C, 170°C, 180°C, 190°C, 190°C, 190°C, 190°C and 190°C, the head temperature is 190°C, the screw speed is 190r / min, and the feeding speed is 10r / min; Extrude, stretch, cool and wind in the extruder to obtain a PPR-based composite filament with a diameter of 1.75mm for 3D printing. The processing temperature of the consumable extruder is 180 from the hopper to the head. ℃, 210℃, 210℃ and 200℃, the extrusion speed is 700r / min, and the pulling speed is 80r / min.

[0034] The obtained PPR-b...

Embodiment 3

[0036] 60 parts by mass of random copolymerized polypropylene, 29 parts of glass fibers, 10 parts of EPDM rubber and 1.0 parts of antioxidant 1010 were put into a high-speed kneader and mixed for 6 minutes to obtain a premix; The mixed materials are put into the twin-screw extruder for blending and extrusion, and then cooled and pelletized to obtain composite material pellets. The processing temperature of the twin-screw extruder is divided into eight sections, which are successively set as: 160°C, 170°C, 180°C, 190°C, 190°C, 190°C, 190°C and 190°C, the head temperature is 190°C, the screw speed is 190r / min, and the feeding speed is 10r / min; Extrude, stretch, cool and wind in the extruder to obtain a PPR-based composite filament with a diameter of 1.75mm for 3D printing. The processing temperature of the consumable extruder is 180 from the hopper to the head. ℃, 210℃, 210℃ and 200℃, the extrusion speed is 700r / min, and the pulling speed is 80r / min.

[0037] The obtained PPR-b...

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Abstract

A low-warpage PPR-based composite wire for 3D printing, disclosed in the present invention, is obtained by premixing a polypropylene random copolymer, a glass fiber and a thermoplastic elastomer and processing the obtained mixture by a twin-screw extruder and a 3D printing consumable extruder under routine conditions. The tensile strength of the obtained composite wire with a diameter of 1.75 mm is 19.4-25.6 MPa, the tensile modulus of the wire is 111.5-330.9 MPa, and the warpage curvature of a printed product is 2.39-5.72 m<-1>. The polypropylene random copolymer having a low self-crystallinity and capable of greatly reducing shrinkage deformation of a material due to a high crystallization degree is adopted as a matrix, and the glass fiber capable of further reduce the crystallization ability of polypropylene and thermoplastic elastomer are also adopted, so the molding shrinkage of the composite wire is greatly reduced, the warpage of the printed product is reduced, and the compositewire is also strengthened and toughened, thereby the composite wire has a high strength and a good toughness.

Description

technical field [0001] The invention belongs to the technical field of materials for 3D printing and their preparation, and in particular relates to a low-warp PPR-based composite filament for 3D printing and a preparation method thereof. Background technique [0002] 3D printing technology, also known as additive manufacturing (AM) technology, is a type of rapid prototyping technology. Its basic working method includes CAD modeling, STL file conversion, slicing processing and generating program, importing to printer for printing, product post-processing and other steps. This technology directly uses 3D model data as the basis to manufacture entities, which greatly shortens the product development cycle compared with traditional production and processing methods. At present, this technology has been widely used in many fields such as industrial design, culture and art, aerospace, military, film and television, light industry, and medicine. 3D printing technology can be div...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/16C08K7/14C08K5/134C08L23/08B33Y70/00
CPCB33Y70/00C08L23/14C08L2205/02C08L23/16C08K7/14C08K5/1345C08L23/0815
Inventor 张杰冷杰
Owner SICHUAN UNIV
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