3D printing method for fiber-grade electric conduction product based on reactive extrusion

A reactive extrusion and 3D printing technology, applied in the field of 3D printing, can solve the problems such as the inability to quickly control the properties of the material body, the uniform distribution of difficult functional components, and the unstable product quality. improved effect

Inactive Publication Date: 2016-08-10
DONGHUA UNIV
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] From the perspective of existing technology, functional composite materials and products for 3D printing have been reported, but there are still some problems, mainly in the following aspects: Among the polymer raw materials, mainly pre-polymerized materials cannot be quickly regulated The bulk properties of the material; during the 3D printing process, the polymer needs to be remelted, and because the melting tube of the conventional 3D printing is short, in order to ensure the melting of the polymer, the heating temperature needs to be raised to 20-50°C above the melting point of the polymer , this secondary processing process affects the performance of the polymer itself, and it is easy to produce low molecular weight, and bubbles are prone to appear during the printing process, which af

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A 3D printing method for fiber-grade conductive products based on reaction extrusion, the lactam monomer valerolactam and the lactone monomer valerolactone with the addition of 0.1wt% additive acetyl caprolactam and the addition of 10wt% % plasticizer dibutyl phthalate; after melting, the polymerization reaction is carried out under the action of 0.01wt% catalyst sodium hydroxide at a temperature of 150°C, and 0.01wt% conductive filler is added before the polymerization reaction agent conductive carbon black to obtain the target polymer whose number average molecular weight is 1000, and the polymerization reaction is completed in a screw extruder. The screw extruder includes a screw, an extrusion motor connected to the screw, a heating ring, a temperature sensor and a metering pump; It is a single screw with a length-to-diameter ratio of 12, equal pitch, a helix angle of 14°, a screw groove depth of 1.5mm, and a surface roughness of Ra0.4; the extrusion motor connected t...

Embodiment 2

[0041]A 3D printing method for fiber grade conductive products based on reactive extrusion, the lactam monomer caprolactam and the lactone monomer caprolactone are added with an additive of 5wt% isocyanate and an added amount of 40wt% plasticizer Citric acid ester; After melting, under the action of 1wt% catalyst potassium hydroxide, the temperature is 300°C for polymerization reaction. During the polymerization reaction, 30wt% conductive filler metal fragment copper is added to obtain the number average molecular weight For the target polymer of 20000, the polymerization reaction is completed in a screw extruder. The screw extruder includes a screw, an extrusion motor connected to the screw, a heating coil, a temperature sensor and a metering pump; the screw is a twin screw, and the aspect ratio is 48 , equal pitch, helix angle of 18°, screw groove depth of 3.5mm, surface roughness of Ra0.8; the extrusion motor connected to the screw is fixedly installed on the right side of t...

Embodiment 3

[0046] A fiber-level 3D printing method based on reactive extrusion conductive products, the lactam monomer enantholactam and the lactone monomer enantholactone with an additive amount of 0.5wt% carbamate and an additive amount of 15wt% plasticizer gallium chloride; after melting, under the action of a stable compound formed by the addition of 0.08wt% catalyst methyl and sodium, the temperature is 250 ° C. During the polymerization, add 0.9 The conductive filler stainless steel wire of wt% obtains the target polymer that the number average molecular weight is 10000, and polymerization reaction is finished in screw extruder, and screw extruder comprises screw, the extruding motor that connects screw, heating ring, temperature sensor and Metering pump; the screw is three-screw, the length-to-diameter ratio is 45, the pitch is equal, the helix angle is 16°, the depth of the screw groove is 1.8mm, and the surface roughness is Ra0.6; the extrusion motor connected to the screw is fix...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Helix angleaaaaaaaaaa
Depthaaaaaaaaaa
Depthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a 3D printing method for a fiber-grade electric conduction product based on reactive extrusion. After a lactam monomer and/or a lactone monomer are/is fused with an assistant and a plasticizer, the polymerization reaction is conducted under the action of a catalyst, an electric conduction filler is added before polymerization or in the polymerization process, fusion deposition 3D printing is conducted, and a final product is obtained after heat treatment. A high-precision and high-adaptability 3D printer is adopted, the forming precision and efficiency are high, the mechanical performance of the product is good, and the dispensability of functional components is good. The technology directly from polymerization monomers to the product is adopted, and the product flexibility is improved. Meanwhile, edge warping of nylon, polyester and other hypocrystalline polymers due to crystallization and the large temperature difference, and even unavailable printing are avoided. The kinds of fusion deposition 3D printing materials are widened, the quality of the product is improved, and the 3D printing method is widely applied to the fields of automobile materials, electronic devices, engineering materials, electromagnetic shielding materials and the like.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and relates to a 3D printing method of a fiber-level conductive product based on reaction extrusion, in particular to a 3D printing method directly from a monomer to a product. Background technique [0002] 3D printing technology is a rapid prototyping technology that is gradually becoming popular at present. This is a green desktop rapid prototyping technology, which has the advantages of small size, low cost, low pollution, and convenient use. The basic principle is to use polymer materials as the base material, adopt fused accumulation molding or fused deposition molding technology, complete the structure and formation of object pairs by layer-by-layer printing, and finally form products by layer-by-layer stacking, which can be built layer by layer under precise positioning. various three-dimensional objects. [0003] Using the characteristics of 3D printing, it can be controlled by softw...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B29C67/02B33Y10/00B33Y50/02B33Y30/00B33Y40/00B33Y70/00B29L31/34
CPCB29L2031/34B33Y10/00B33Y30/00B33Y40/00B33Y50/02B33Y70/00
Inventor 陈烨王朝生王华平汤廉
Owner DONGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap