To understand this title, you have to know what is glass fiber?
In our 3D printing industry, the main process of printing nylon or nylon + glass fiber is called SLS (selective laser sintering), and glass fiber is the abbreviation of glass fiber.
Fiberglass is an inorganic non-metallic material with excellent performance. It has the characteristics of good insulation, high temperature resistance and good corrosion resistance. It is used by 3D printing technology, but its disadvantages are brittleness and poor wear resistance. .
Is the ratio of nylon and glass fiber only 30%?
Of course not. In 3D printing nylon plus glass fiber materials, there are also 15% and 40%, etc., but in the market, there are many people who choose to add 30% glass fiber to print models.
Why are there fewer users who choose to add 40% glass fiber for printing? Because with the increase of glass fiber, the mechanical properties will show a curve that first increases and then decreases, and its highest point is also the best bonding point between 30-35%.
The model printed with 40% glass fiber nylon material is more brittle.
What is the difference between nylon with glass fiber and without glass fiber?
Looking at the difference between them, we use data to speak. You can take Qi Siyin’s material data as an example to see what are the differences in their parameters.
Nylon PA12 (SLS)
Heat distortion temperature 146℃ Density 1g/m³
Tensile strength 46MPa Bending strength 46.3MPa
Tensile modulus 1602MPa Notched impact strength 4.9KJ/㎡
Flexural modulus 1300MPa Fracture productivity 3.6%
Nylon PA12+ glass fiber (30%) (SLS)
Heat distortion temperature 160℃ Density 1.26g/m³
Tensile strength 44MPa Bending strength 68MPa
Tensile modulus 3500-7800MPa Notched impact strength 4.13KJ/㎡
Flexural modulus 2415MPa Fracture productivity 5%
Hardness and toughness:
From the above data, in terms of hardness and toughness, nylon with glass fiber will also perform better than nylon without glass fiber, of course, this is related to the material properties of glass fiber.
From the data, the 3D printing nylon material with glass fiber has a higher temperature resistance, and the theoretical data is that it can withstand a high temperature of 160 degrees.
However, if the ambient temperature is 160°C for a long time, we also do not recommend users to refer to this theoretical data, because 160°C is usually a limit data.
What kind of products is nylon and glass fiber suitable for, and what are the characteristics?
This material is more suitable for product function testing. It can be used to make some chains, springs, and products with active strength. Mostly used in auto parts, household appliances, household equipment.
In addition, the surface of nylon + glass fiber is grainy. The nylon material is a permeable material that absorbs fine dust in the air, and if you put it outdoors in direct sunlight, it is easy to turn yellow.
Therefore, those of you who have requirements for surface and coloring should consider these influencing factors as appropriate.