Bada BADAMID PA12 GM30 H natural S2 is a 30% glass fiber reinforced, heat-stabilized polyamide 12 compound supplied in natural color. The GM30 designation identifies the nominal glass fiber mass fraction of 30%; the H suffix indicates a heat-stabilization package, and S2 denotes the viscosity and processing grade within the Bada product matrix. The term “conditioned” in the product data refers to specimens exposed to a standard atmosphere of 23 °C and 50% relative humidity according to ISO 291, which is the moisture content at which mechanical values are commonly reported for service-relevant comparisons. Because polyamide 12 has a lower amide group density than PA6 or PA66, the equilibrium moisture uptake of the polymer matrix is approximately 0.8–1.1% at 23 °C and 50% RH. The glass fiber component is non-hygroscopic, so the compound-level moisture uptake is lower than that of unreinforced PA12 on a total mass basis. In the conditioned state, tensile modulus and tensile strength are reduced relative to dry-as-molded values, while notched impact energy and elongation at break generally increase. Dimensional stability, creep resistance, resistance to hydrocarbon-based fluids, and lower moisture sensitivity relative to PA6 and PA66 are the primary technical attributes relevant to product selection.

What Specification Framework Applies to Bada BADAMID PA12 GM30 H natural S2?

Typical supplier-reported values for a conditioned 30% glass fiber reinforced heat-stabilized PA12 compound are determined using ISO 527-1/-2 tensile bars at 23 °C. Density falls between 1.24 g/cm³ and 1.26 g/cm³ when measured according to ISO 1183-1. Conditioned tensile modulus is commonly in the range 5,000–6,500 MPa, tensile stress at break between 80 MPa and 105 MPa, and elongation at break between 5% and 12%. Dry-as-molded tensile modulus is approximately 7,000–8,000 MPa, with tensile stress at break in the region of 110–135 MPa. The difference between dry and conditioned values demonstrates the plasticizing effect of absorbed water on the amorphous phase of the polyamide matrix. Notched Charpy impact energy per ISO 179-1/1eA at 23 °C commonly rises from 10–15 kJ/m² in the dry state to 15–25 kJ/m² after conditioning. Heat deflection temperature under 0.45 MPa per ISO 75-1/-2 is typically near 165–175 °C, while the melting temperature determined by DSC per ISO 11357-3 is between 175 °C and 180 °C. These ranges are representative for glass fiber reinforced PA12 compounds of this filler loading; the exact certificate of analysis from the manufacturer remains the controlling specification for batch acceptance.

When Glass Fiber Orientation and Moisture Conditioning Shift the Mechanical Envelope

Because the compound contains 30% glass fiber by weight, injection-molded parts develop anisotropic mechanical properties governed by flow-induced fiber orientation. Along the primary melt-flow direction, tensile modulus may exceed cross-flow values by 25–45%, depending on gate type, wall thickness, and hold-pressure profile. Weld-line regions in glass-filled polyamide can exhibit tensile strength reductions of 30–60% relative to unfused material; gate location is therefore treated as a structural variable rather than a cosmetic decision. Mold shrinkage in the flow direction is typically 0.2–0.4%, while transverse shrinkage may reach 0.5–0.8% after 48 h at 23 °C and 50% RH. Conditioning reduces tensile modulus by 15–25% relative to the dry state due to plasticization of the amorphous phase and disruption of interfacial hydrogen bonding at the glass-matrix interface. The influence is most pronounced at quasi-static strain rates below 1 s⁻¹; high-rate impact response is less sensitive to moisture content. For load-bearing design calculations, conditioned tensile modulus and creep modulus should be used rather than dry datasheet values, especially when the application involves relative humidity above 50%, intermittent condensation, or direct water contact.

For injection molding of Bada BADAMID PA12 GM30 H natural S2, pre-drying in a desiccant-air drier at 80 °C for 4–8 h is recommended to achieve a residual moisture level below 0.10% by weight as determined by ISO 15512 Karl Fischer titration. Higher residual moisture produces splay, nozzle drool, and hydrolysis-related molecular weight loss at melt temperatures above 260 °C. Barrel temperature profiles on a general-purpose screw with 20:1 to 25:1 L/D and compression ratio 2.0:1 to 2.5:1 are set from 240 °C in the feed zone to 260–280 °C in the metering zone, with nozzle temperature maintained at 270–280 °C. Mold temperature is controlled between 60 °C and 90 °C to reduce post-molding warpage and stabilize crystallization. Mold temperatures below 50 °C promote higher amorphous orientation, increasing shrinkage anisotropy and long-term creep. Fill time for wall thicknesses from 1.5 mm to 4.0 mm is usually set between 0.5 s and 2.0 s. Hold pressure is typically 50–80 MPa hydraulic pressure or 60–100 MPa specific injection pressure. Back pressure of 0.5–1.5 MPa assists glass fiber distribution without excessive fiber breakage. For flow paths with wall thickness below 1.2 mm, sequential valve gating reduces flow-front hesitation and the associated glass fiber depletion at abrupt transitions. Production-scale equipment experience indicates that standard nitrided screw and barrel surfaces wear at approximately 1.5–3.0 times the rate of unfilled polyamide because of glass fiber abrasion; bimetallic barrels and hardened screws are required to maintain shot-weight consistency over more than 500,000 cycles. Melt residence time should be kept below 10 min. At 280 °C, each additional 5 min of heated residence under an oxygen-containing atmosphere can reduce impact energy by 5–10% and increase visible yellowing.

Thermomechanical and Rheological Differences Across PA12, PA6 GF30, and PA66 GF30

Compared with unfilled PA12, the glass fiber reinforced grade raises tensile modulus from approximately 1,400–1,600 MPa to 5,000–8,000 MPa depending on moisture state. This increase comes with reduced elongation and greater notch sensitivity. Compared with PA6 GF30, Bada BADAMID PA12 GM30 H natural S2 absorbs less moisture, retains a higher fraction of dry mechanical properties after conditioning, and exhibits superior resistance to hydrolysis and zinc chloride stress cracking. Dry tensile modulus of PA6 GF30 is typically higher, near 9,000–10,000 MPa per ISO 527-1/-2, but the conditioned modulus drops more sharply because of the higher equilibrium moisture content of the PA6 matrix. Compared with PA66 GF30, the PA12 product has a lower melting point, generally lower dry strength, and better resistance to moisture-induced dimensional change. The following table summarizes representative comparative values for material screening.

Melt viscosity of the 30% glass fiber grade is substantially higher than unfilled PA12, and the flow length for thin-wall sections is reduced. Rheological measurements with a capillary rheometer per ISO 11443 show shear-thinning behavior typical of glass-filled polyamide; apparent viscosity at 260 °C and shear rate 1,000 s⁻¹ is commonly in the range 120–220 Pa·s for this filler level, depending on S2 viscosity grade. Tool design must account for higher injection pressure and the resulting increase in clamp-force demand relative to unfilled PA12. Published fatigue data for this specific configuration in weld-line-loaded components is limited; component validation under end-use load spectra is therefore required before replacing a metal or higher-stiffness thermoplastic part.

Chemical Resistance Boundaries and Application Constraints

Bada BADAMID PA12 GM30 H natural S2 is resistant to aliphatic hydrocarbons, diesel fuel, lubricating oils, greases, and many neutral salt solutions. In automotive fuel and pneumatic systems, glass-filled PA12 grades are commonly specified where dimensional stability under fuel exposure is required. However, the material is not intended for continuous contact with strong mineral acids, phenols, oxidizing agents, or pressurized hot water above 80 °C under simultaneous mechanical stress. The natural grade is not flame retardant; if a specific UL 94 rating is required, the formulation must be verified through the supplier because glass fiber can reduce ignition resistance and promote wicking in thin sections. Compliance with food-contact regulations such as FDA 21 CFR 177.1500 or EU 10/2011 must be confirmed for the specific heat stabilization and glass fiber sizing package and is not automatically conferred by the PA12 base resin. Applications include structural clips, pump housings, pneumatic manifolds, cable harness retainers, and appliance frames where low moisture absorption and glass-reinforced load capacity are more important than high-temperature service above 120 °C continuous air exposure. For parts exposed to continuous thermal aging, the heat-stabilized H grade increases retention of tensile properties compared with non-heat-stabilized PA12 GF30, but oxidative aging at the surface remains the limiting mechanism above 120 °C. Long-term creep modulus under sustained load can be significantly lower than short-term tensile modulus; designers should obtain creep modulus at the application temperature and stress state rather than extrapolating from short-term ISO 527-1/-2 data.