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Composite material for 3D printing and preparation method thereof

A composite material and 3D printing technology, applied in additive processing, rayon manufacturing, conjugated synthetic polymer rayon, etc., can solve problems such as poor dimensional stability, poor mechanical properties of printed products, and high water absorption

Active Publication Date: 2022-06-14
南京特塑复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fiber-reinforced thermoplastic composite material 3D printing technology has obvious advantages compared with traditional resin composite material printing and molding technology, especially in mechanical properties. Existing mature products are mostly concentrated in nylon-based composite material system, but the fiber content is generally lower than 30%, while It is difficult to guarantee the dimensional accuracy of high-fiber-content composite material wires, resulting in poor mechanical properties, high water absorption, and poor dimensional stability of the final printed product

Method used

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  • Composite material for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Carbon fiber is used as reinforcement material, and PA6T-6I and PA6T-6 are used as matrix materials to prepare high-performance 3D printing filaments with a diameter of 1.75mm. The specific preparation steps are as follows:

[0031] Step 1: Feed the dried PA6T-6 from the main feeding port of the extruder, feed the carbon fiber from the side feeding port of the extruder, and perform melt blending and granulation to obtain a fiber mass content of The total amount of PA6T-6 composite material system is 20% PA6T-6 / fiber composite material as the skin layer;

[0032] Step 2: Feed the dried PA6T-6I from the main feeding port of the extruder, feed the carbon fiber from the side feeding port of the extruder, and prepare it into a 1.5mm diameter through the melt extrusion molding process. The 3D printing wire is used as the core layer, and the fiber mass content is 40%;

[0033] Step 3: The 3D printing wire prepared in Step 2 is introduced into the mold as a continuous reinforc...

Embodiment 2

[0038] Carbon fiber is used as reinforcement material, and PA6T-66 and PA6T-6 are used as matrix materials to prepare high-performance 3D printing filaments with a diameter of 1.75mm. The specific preparation steps are as follows:

[0039] Step 1: Feed the dried PA6T-6 from the main feeding port of the extruder, feed the glass fiber fibers from the side feeding port of the extruder, and perform melt blending and granulation to obtain fiber quality PA6T-6 / fiber composite with a content of 10% in the total amount of the PA6T-6 composite system

[0040] Step 2: Feed the dried PA6T-66 from the main feeding port of the extruder, feed the glass fiber from the side feeding port of the extruder, and prepare it into a diameter of 1.5mm through the melt extrusion molding process 3D printing filament with a fiber mass content of 30%;

[0041] Step 3: The 3D printing wire prepared in Step 2 is introduced into the mold as a continuous reinforcement, and the blended particles prepared in S...

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Abstract

The invention belongs to the field of composite materials, and relates to a composite material for 3D printing and a preparation method thereof. The invention provides a composite material for 3D printing, the composite material has a skin-core structure, the inner core layer is a polymer 1 / fiber composite material, and the outer skin layer is a polymer 2 / fiber composite material; wherein, the fiber in the core layer material The content of fiber accounts for 30-50% of the mass of polymer 1 / fiber composite material; the content of fiber in the cortex material accounts for 10-20% of the mass of polymer 2 / fiber composite material; and, polymer 1 and polymer 2 satisfy: polymerization Melting point of substance 1 The melting point of polymer 2 = 10-40°C. The composite material obtained in the invention can be used as a 3D printing substrate, and has the advantages of low water absorption, high dimensional stability, high mechanical properties and high temperature resistance.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a composite material for 3D printing and a preparation method thereof. Background technique [0002] 3D printing, also known as additive manufacturing, is a rapid manufacturing technology that forms three-dimensional entities by adding materials. Compared to traditional subtractive techniques, 3D printing can manufacture geometric entities of arbitrary shapes. [0003] Compared with traditional resin composite materials, the 3D printing technology of fiber-reinforced thermoplastic composites has obvious advantages, especially the advantages of mechanical properties. The existing mature products are mostly concentrated in nylon-based composite material systems, but the fiber content is generally less than 30%, while It is difficult to guarantee the dimensional accuracy of the high fiber content composite material wire, resulting in poor mechanical properties, high water absorptio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/12D01F1/10B33Y70/10
CPCD01F8/12D01F1/10B33Y70/10
Inventor 张守玉水锋陈同海王孝军杨杰敬雪峰
Owner 南京特塑复合材料有限公司