Materials with good tensile strength are harder to break when pulled Impact strengthĪnother key indicator of strength is impact strength. Weak materials include thermoplastic polyurethane ( TPU) and acrylonitrile butadiene styrene (ABS). It is a key metric for almost any functional printed part.Īt the low-cost consumer level, the strongest 3D printer filaments in terms of tensile strength include polycarbonate (PC), polyethylene terephthalate glycol-modified (PETG), and polylactic acid ( PLA). It is expressed in megapascals (MPa) or, in the United States, in pounds per square inch (psi), and values are determined by performing a tensile test: literally pulling a piece of the material apart and using a tensometer to record the exact degree of tension at which the material breaks. Tensile strength is the most widely used indicator of strength for 3D printed parts, because it indicates a material’s suitability for load-bearing or mechanical applications. Used to indicate the ultimate strength of a material or part, tensile strength can be defined as the ability to resist breakage when under tension, i.e. These are tensile strength and impact strength. However, two types of strength are generally prioritized over any other. But you could much more easily pull the chewing gum apart with your hands than you could the glass bottle.Īll of the various strength-related attributes are important when it comes to choosing and buying 3D printer filament. If you were to hurl the two objects at a wall, the glass would obviously break and the chewing gum would survive almost unscathed. For example, try to imagine the relative strength of a glass bottle and a piece of chewing gum. These different terms are needed because materials can be strong or weak in different ways. When comparing filaments, you’ll see terms like tensile strength, impact strength, tear strength, and flexural strength - all of which can be measured using standardized strength tests - in addition to more general terms like durability and toughness. Strong 3D printing filament is in high demand, but “strength” can actually mean a few different things in this context. It is by no means an exhaustive guide to high-strength materials, but it takes a look at some of the most popular high-strength filaments in the consumer sphere, while also touching on some professional-grade materials reserved for advanced users. This article looks at some of the strongest 3D printer filaments available for users of FDM 3D printers. Demand for high-strength materials is growing, and many manufacturers have been happy to provide solutions. This is partly due to the cost of the stronger raw materials, and partly due to the increased use of 3D printing as a tool for end-use manufacturing, with real functional parts requiring greater strength than prototypes. Take a look at the filament market and it’s easy to see that the strongest 3D printer filaments out there command a higher price than their weaker counterparts. Chief among these desirable properties, however, is strength: nobody wants their 3D printed parts to break, and material strength is one of the best ways to ensure this doesn’t happen. These characteristics can include printability, durability, chemical resistance, temperature resistance, and flexibility, to name just a few. Parts are produced with an improved visual finish and better mechanical properties.Good 3D printing materials tend to offer a mix of desirable characteristics. PEKK Carbon offers a slower crystallisation speed than PEEK, which enables transformation at lower room temperatures, offering better interlayer adhesion and less warping. Components produced from PEKK Carbon can be exposed to acids and hydrocarbons, like fuels and lubricants, and can be used as elements of engine housings. PEKK Carbon is a thermoplastic polymer reinforced with carbon fibre which gives a high level of rigidity and heat resistance. While printing this material on 3DGence INDUSTRY line printers you can use soluble supports. This material is one of the best examples of high-performance polymers. Thanks to the enhanced layer adhesion PEKK can reach even higher tensile strengths in each axis comparing to PEEK. The crystallization rate is slightly slower than PEEK, which makes it much easier to control and can lead to better layer adhesion. PEKK is highly versatile: it combines chemical resistance, flame retarding properties and the mechanical properties which are one the highest of all known thermoplastic materials. This material is often used as a metal replacement due to its exceptional properties. The user needs to take care of the storage conditions – PEKK is highly moisture sensitive. PEKK is usually expected to be printed and left in an amorphous state.
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