3D printing modified polylactic acid material and preparation method thereof

A polylactic acid material, 3D printing technology, applied in rayon manufacturing, single-component polyester rayon, fiber chemical characteristics, etc., can solve the problems of low impact strength, poor heat resistance, poor toughness, etc., and achieve impact strength Improvement, high product quality and good toughness

Inactive Publication Date: 2013-12-25
佛山市斯太克科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects of low impact strength, poor toughness and poor heat resistance in current 3D printing polylactic acid materials, this invention proposes a 3D printing modified polylactic acid material and its preparation method

Method used

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  • 3D printing modified polylactic acid material and preparation method thereof
  • 3D printing modified polylactic acid material and preparation method thereof
  • 3D printing modified polylactic acid material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) 70 parts by weight of polylactic acid, 5 parts of dibutyl alcohol diisocyanate, 5 parts of polyhydrocarbyl acrylate, 1 part of 6000 mesh montmorillonite, 5 parts of polyacrylate with molecular polymerization degree of 40, 5 parts 1 part of nano silicon dioxide and 0.5 part of composite antioxidant are added to a low-temperature planetary ball mill, fully mixed and ground for 2 hours at a temperature of -15 degrees Celsius and a speed of 300 r / min, and then discharged;

[0034] 2) The mixture obtained in step 1) and 5 parts of polybutylene succinate were mixed and extruded into pellets with a single-screw extruder, and the residence time of the materials in the extruder was 2 minutes. The screw diameter of the single-screw extruder is 75mm, the aspect ratio is 20:1, the temperature of the extruder is set as follows: 170°C, 175°C, 185°C, 190°C, 185°C, and the die head temperature is 205°C;

[0035]3) Dry the particles made in step 2) at a temperature of 50° C. for 2 ho...

Embodiment 2

[0039] 1) 75 parts by weight of polylactic acid, 3 parts of polymethyl diisocyanate, 2 parts of polyhydrocarbyl trimethacrylate, 2 parts of 6000 mesh talcum powder, 4 parts of polyvinyl alcohol with a molecular polymerization degree of 50, 3 parts of nano-calcium carbonate and 0.6 part of composite antioxidant were added to a low-temperature planetary ball mill, and the mixture was fully mixed and ground for 1.5 hours at a temperature of -10 degrees Celsius and a speed of 350 r / min, and then discharged;

[0040] 2) Mix the mixture obtained in step 1) and 8 parts of polybutylene adipate with a single-screw extruder to extrude and pelletize. The residence time of the materials in the extruder is 1.5 minutes. The screw diameter of the single-screw extruder is 75mm, the aspect ratio is 20:1, the temperature of the extruder is set as follows: 180°C, 185°C, 195°C, 200°C, 190°C, and the die head temperature is 205°C;

[0041] 3) Dry the particles made in step 2) at a temperature of 5...

Embodiment 3

[0045] 1) 80 parts by weight of polylactic acid, 5 parts of polymethyl diisocyanate, 3 parts of polyhydrocarbyl acrylate, 2 parts of 8000 mesh montmorillonite, 5 parts of polylactic acid with a molecular polymerization degree of 80, 2 parts Add nano-silica and 0.8 parts of composite antioxidant to a low-temperature planetary ball mill, fully mix and grind for 2 hours at a temperature of -10 degrees Celsius and a speed of 300 r / min, and then discharge;

[0046] 2) Mix the mixture obtained in step 1) with 8 parts of poly(adipic acid-succinic acid) butanediol copolyester with a single-screw extruder and extrude to pelletize, and the material stays in the extruder The time is 2 minutes. The screw diameter of the single-screw extruder is 75mm, the aspect ratio is 20:1, the temperature of the extruder is set as follows: 180°C, 185°C, 190°C, 200°C, 195°C, and the die head temperature is 210°C;

[0047] 3) Dry the particles made in step 2) for 3 hours at a temperature of 50° C. and e...

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Abstract

A 3D printing modified polylactic acid material comprises, by weight, 70-85 parts of polylactic acid, 1-5 parts of chain extenders, 1-5 parts of cross-linking agents, 0.5-1 part of nucleating agents, 5-10 parts of polymers with low molecular weights, 5-10 parts of flexibilizers, 1-5 parts of fortifiers and 0.3-0.8 part of antioxidants. According to the 3D printing modified polylactic acid material, a low-temperature smashing hybrid reaction technology is utilized, modified processing is carried out on polylactic acid, toughness, impact strength and the heat distortion temperature for the polylactic acid are improved to a large extent, and the polylactic acid can have wider application prospects in 3D printing materials.

Description

technical field [0001] The invention relates to a 3D printing material and a preparation method thereof, in particular to a 3D printing modified polylactic acid material and a preparation method thereof. Background technique [0002] 3D printing technology, also known as additive manufacturing technology, is actually an emerging technology in the field of rapid prototyping. It is based on digital model files and uses bondable materials such as powdered metal or plastic. A technique for constructing objects in a manner. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. At present, 3D printing technology is mainly used in product prototyping, mold manufacturing, art creation, jewelry making and other fields, replacing these traditional fine processing techniques. In addition, 3D printing technology is gradually applied in fields such as medicine, bioengineering, architecture, clothing, aviati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L29/04C08L33/04C08L67/02C08K13/02C08K5/29C08K5/103C08K3/34C08K3/36C08K3/26B29B9/06B29B13/06B29C47/00D01F6/92D01F1/10
Inventor 陈庆李兴文曾军堂
Owner 佛山市斯太克科技有限公司
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