Why is the 3D printing material ABS used the most?
Date of release:2018-11-12 Author: Click:
3D printing ABS material usage can be said to be the most, which is inseparable from the characteristics and practicality of ABS materials: ABS is a commonly used plastic, hard hats, toys and many other common products are used ABS It is refined from petroleum. 2kg of oil can produce 1kg of ABS plastic, which is very low cost and can be recycled.
It is also one of the commonly used consumables for FDM type 3D printers. Its elasticity and wear resistance are better than PLA. Today, we will talk about ABS specifically, and there are some academic terms.
ABS Chinese name: acrylonitrile-butadiene-styrene copolymer
Abbreviation: ABS, A for acrylonitrile, B for butadiene, S for styrene
English: Acrylonitrile butadiene Styrene copolymers
Molecular formula: C45H51N3X2
Molecular weight: 633.91
ABS material is one of the commonly used engineering plastics. It has the characteristics of high strength and low weight. It is opaque and has a light ivory appearance. It is non-toxic, tasteless, and has the characteristics of toughness, hardness and rigidity.
It burns slowly, the flame is yellow, and there is black smoke. After burning, the plastic softens and burns, giving off a special cinnamon smell, but no melting dripping.
Specific gravity: 1.05 g / cm 3
Molding shrinkage: 0.4-0.7%
Molding temperature: 200-240 ° C
Drying conditions: 80-90 ° C / 2 hours.
ABS material has better comprehensive performance, high impact strength, good chemical stability and good electrical properties. It has good welding property with 372 plexiglass, and is made into two-color plastic parts, and can be chrome-plated and painted.
The fluidity is a little worse than HIps, better than PMMA, PC, etc., and can be generally classified into high impact, high heat resistance, flame retardant, enhanced, transparent and so on.
The temperature required to print ABS is a little higher than PLA, typically around 230 degrees. A toxic odor is produced when printing, and the room is kept as ventilated as possible during the printing process.
1. Amorphous material, medium fluidity, large moisture absorption, must be fully dried, and the plastic parts with glossy surface requirements must be preheated and dried for a long time.
2. It is advisable to take high material temperature, but the material temperature is too high to be easily decomposed (decomposition temperature is >270 degrees). For high precision plastic parts, the mold temperature should be 50-60 degrees, for high gloss and heat resistant plastic parts. The mold temperature should be 60-80 degrees.
3. If you need to solve the water trap, you need to improve the fluidity of the material, adopt high material temperature, high mold temperature, or change the water level.
4. If the heat-resistant grade or flame-retardant grade material is formed, the plastic decomposition product will remain on the surface of the mold after 3-7 days of production, which will cause the surface of the mold to be bright, and the mold needs to be cleaned in time, and the surface of the mold needs to be increased.
5. In the 3D printing industry, acetone is often used for surface finishing.
ABS is currently the largest and most widely used polymer. It combines the properties of PS, SAN and BS organically, and has excellent mechanical properties such as toughness, hardness and rigid phase balance.
It has many advantages, good dimensional stability, electrical properties, wear resistance, chemical resistance, dyeability, molding processing and machining performance.
ABS is resistant to water, inorganic salts, alkalis and acids, is insoluble in most alcohols and hydrocarbon solvents, and is readily soluble in aldehydes, ketones, esters and certain chlorinated hydrocarbons.
The disadvantage is that the heat distortion temperature is low, flammable, and poor weather resistance.
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