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SLA 3D Printing Resin Materials
Selective Laser Sintering (SLS) stands as the premier additive manufacturing technology for producing robust, functional end-use parts without the need for support structures. By using a high-power laser to sinter polymer powder layer by layer, SLS unlocks geometric freedom that traditional manufacturing simply cannot match. At JUCHENG, we have established ourselves as a comprehensive one-stop additive manufacturing hub. We don't just print standard white nylon; our facility processes a vast ecosystem of industrial-grade powders—from ductile PA11 and rigid Glass-Filled Nylon to flexible TPU elastomers and high-performance Carbon-Fiber composites. Whether you need a single complex duct or a production run of 10,000 durable clips, our industrial SLS fleet delivers isotropic mechanical properties comparable to injection molding.

JUCHENG's SLS Production Capabilities

To ensure your parts perform in the real world, we go beyond basic printing. Our SLS capabilities include:
  • Massive Material Selection: We stock over 8 different types of polymer powders to meet specific thermal, mechanical, and flexible requirements.
  • High-Volume Nesting: Our large-format build chambers allow us to "nest" hundreds of parts in a single print run, significantly reducing the unit cost for low-volume production.
  • Advanced Post-Processing: Raw SLS parts have a sugary, matte finish. We offer Vapor Smoothing (for water-tight, smooth surfaces), Dyeing (Black, Red, Blue), and Media Tumbling to achieve a consumer-ready look.
  • Dimensional Accuracy: We strictly control powder freshness ratios and laser parameters to maintain tight tolerances (+/- 0.3mm) and isotropic strength in all axes (X, Y, and Z).
SLS 3D printed parts

Advantages of SLS 3D Printing Materials

 
Advantage Detailed Description Key Benefit
No Support Structures Parts are supported by the unsintered powder bed during printing. Allows for unlimited design freedom: complex undercuts, internal channels, and interlocking moving parts.
Isotropic Mechanical Properties Unlike FDM, SLS parts have nearly equal strength in all directions (Z-axis is strong). Reliable performance for functional snap-fits, living hinges, and load-bearing clips.
High Durability & Heat Resistance Nylon (PA12/PA11) offers excellent chemical resistance and heat deflection (up to 180°C for GF). Suitable for under-the-hood automotive testing and harsh industrial environments.
Material Versatility Available in rigid, flexible (TPU), and composite (Glass/Carbon/Aluminum) options. One technology can serve diverse needs: from soft gaskets to stiff structural brackets.
Cost-Effective Scalability The ability to stack parts vertically in the build volume reduces machine time per part. The most economical 3D printing method for batches of 50-1,000 plastic parts.

Technical Parameters & Material Properties

JUCHENG offers one of the most complete SLS material portfolios in the industry:
 
Grade Category Specific Models Characteristics Ideal Uses
Standard PA 12 PA 12 White (PA 650) The industry workhorse. Balanced strength, stiffness, and detail resolution. Bright white color (easy to dye). Chemical resistant. Functional prototypes, housings, architectural models, complex ductwork.
High Impact PA 11 PA 11 Black (PA 850) Bio-based (castor oil). Higher elongation at break and impact resistance than PA12. Deep black color. Ductile and tough. Snap-fits, living hinges, interior automotive parts, insoles, crash-test components.
Glass-Filled Nylon PA12-GF (PA614-GS) Reinforced with 40% glass spheres. Significantly higher stiffness and thermal stability (HDT). Reduced warping. Surface is smoother but heavier. Fixtures, structural housings, parts near heat sources, load-bearing brackets.
Mineral-Filled Nylon PA12-MF (PA620-MF) Reinforced with mineral fiber. Highest stiffness and heat deflection temperature among standard SLS materials. Extremely dimensionally stable. Wind tunnel models, pump housings, stiff brackets, jigs.
Flexible Elastomer TPU / TPE Thermoplastic Polyurethane. Rubber-like elasticity with high tear resistance and rebound. Available in varying hardness (Shore A). Gaskets, seals, flexible hoses, shoe soles, cushioning lattice structures.
Carbon-Fiber Nylon PA 11 CF / Carbon Reinforced with carbon fibers. Extreme strength-to-weight ratio and high stiffness. Electrically conductive (ESD safe). Lightweight grey/black finish. Drone components, racing car parts, lightweight structural replacements.
Aluminum-Filled Alumide Metallic grey look. Nylon filled with aluminum dust. Higher thermal conductivity and stiffness. Easy to machine/polish post-print. Metallic-looking prototypes, stiff jigs, parts requiring heat dissipation.
Flame Retardant PA 12 FR Specially formulated to meet UL94 V-0 flammability standards. Self-extinguishing. Aerospace interior components, electronic enclosures requiring fire safety compliance.

SLS Printing Guidelines & Design Tips

  • Wall Thickness: We recommend a minimum wall thickness of 0.8mm - 1.0mm. Walls thinner than this may be flexible or fragile.
  • Hollowing & Escape Holes: To save material cost and prevent warping, large solid parts should be hollowed. Escape holes (min 5mm diameter) must be designed to allow the unsintered powder to be removed from the interior.
  • Tolerances: SLS typically holds tolerances of +/- 0.3mm (or +/- 0.002mm/mm, whichever is greater). It is accurate but less precise than CNC machining.
  • Clearance: For interlocking parts (like chains), maintain a clearance of at least 0.5mm to prevent components from fusing together.

Application Scenarios

  • Automotive: Ventilation ducts, fluid reservoirs (PA11), connector clips, interior trim prototypes.
  • Aerospace: Lightweight drone frames (Carbon-Filled), flame-retardant air vents (FR), non-structural brackets.
  • Consumer Goods: Custom eyewear frames, footwear midsoles (TPU), durable protective cases.
  • Industrial Manufacturing: End-of-arm grippers, assembly fixtures, low-volume housing runs.
  • Medical: Orthotics, prosthetics shells (Biocompatible grades), surgical guides.

Physical Properties Table

Property PA 12 White PA 11 Black PA 12 GF (Glass) TPU (Flexible) PA 11 CF (Carbon) Unit
Tensile Strength 48 48 50 8 - 20 75 MPa
Tensile Modulus 1,700 1,600 3200 100 - 300 5,500 MPa
Elongation at Break 20 45 4 > 300 3 %
Heat Deflection (0.45 MPa) 175 180 180 N/A 190 °C
Density 1.01 1.04 1.22 1.10 1.05 g/cm³
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    Dongguan: Building 5 and 4, No. 198, Chang'an Section, Guanchang Road, Chang'an Town, Dongguan.
     
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