The two main materials used in the selective laser sintering (SLS) process are polyamides and polystyrene.
Polyamides: These are commonly used in SLS due to their strength and durability. Polyamides, often referred to as nylon, are thermoplastic polymers that offer excellent mechanical properties such as high tensile strength, flexibility, and resistance to wear and chemicals. In the SLS process, polyamide powder is spread across a build platform and a laser selectively sinters the powder, fusing particles together to form a solid structure. This material is particularly suitable for producing functional parts and prototypes that require robustness and durability.
Polystyrene: Another material frequently used in SLS, polystyrene is a synthetic aromatic polymer made from the monomer styrene. It is valued for its low cost, ease of processing, and versatility. Polystyrene can be sintered into a wide range of shapes and is often used for prototypes and models due to its ability to capture fine details. However, it is less durable than polyamides and is typically used for non-functional applications or for parts that do not require high mechanical strength.
Both materials are selected based on the specific requirements of the application, with polyamides preferred for functional parts and polystyrene for rapid prototyping and models. The SLS process allows for the creation of complex geometries with these materials, making it a popular choice for various industries including automotive, aerospace, and consumer products.
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