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Polyamide 12[3]

Updated: 2026-09-20

Overview

PA12, or Polyamide 12, is a semi-crystalline thermoplastic belonging to the nylon family. It is synthesized from laurolactam monomers and is prized for its balance of mechanical strength, chemical resistance, and processability. Unlike other nylons (e.g., PA6 or PA66), PA12 absorbs minimal moisture (<2%), making it ideal for precision applications. First commercialized in the 1960s, PA12 is now a cornerstone material in industries requiring durability and lightweight properties. It is commonly processed via injection molding, extrusion, or selective laser sintering (SLS) for 3D printing.

Physical and Chemical Properties

PA12 exhibits a low density (1.01–1.02 g/cm³) and melting point (178–180°C), facilitating easy processing. Its molecular structure grants exceptional resistance to hydrocarbons, oils, and alkalis, outperforming many engineering plastics. Key mechanical properties include a tensile strength of 45–50 MPa and elongation at break of 200–300%. The material’s low moisture absorption (<1.5% at saturation) minimizes dimensional changes in humid environments, a critical advantage for automotive and medical components. PA12 also demonstrates good UV stability and electrical insulation properties.

Main Applications

In the automotive sector, PA12 is the material of choice for fuel lines, brake tubing, and pneumatic hoses due to its resistance to diesel and gasoline. Medical applications include catheters and surgical tools, leveraging its biocompatibility and sterilizability. PA12 powders are widely used in SLS 3D printing for prototyping and end-use parts. Industrial coatings and cable sheathing benefit from its abrasion resistance. Emerging uses include flexible electronics and sports equipment.

Safety and Storage

PA12 is generally non-toxic but may emit fumes (e.g., caprolactam) when heated above 300°C. Proper ventilation is recommended during processing. Dust inhalation should be avoided; PPE like masks and gloves is advised. Storage requires dry conditions (<30°C) to prevent moisture absorption, which can affect processing. Bulk pellets should be sealed in moisture-proof packaging. Shelf life is typically 12–24 months under ideal conditions.

B2B Procurement Guide

Buyers should specify technical requirements such as melt flow index (MFI), impact modifiers, or glass-fiber reinforcement. Medical-grade PA12 must comply with FDA 21 CFR or ISO 10993 standards. Suppliers often provide customized compounding (e.g., flame-retardant or colored grades). MOQs vary; small-quantity purchases (e.g., for 3D printing) may cost 20–30% more per kg. Lead times range from 2–6 weeks for specialty grades.

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