EMS-Grivory Grilamid LBV-30H FWA nat is a natural-color, 30 % glass-fiber-reinforced polyamide 12 (PA12) injection-molding compound supplied in a dry-as-molded state. The material identification under ISO 16396-1 is a PA12 matrix with 30 % by mass chopped glass fiber; the producer’s FWA suffix identifies a formulation intended for food-contact and drinking-water-contact articles through manufacturer declarations, not finished-part certification. The dry designation is operationally significant because mechanical data are generated on specimens with residual moisture below 0.10 %, whereas conditioned values are measured after equilibrium at 23 °C and 50 % relative humidity according to ISO 291. The grade is normally injection molded at melt temperatures from 240 °C to 290 °C and mold temperatures from 60 °C to 100 °C. Use cases include automotive fuel and vapor connectors, compressed-air fittings, filter housings, cable conduits, and structural housings where hydrocarbon resistance, low water uptake, and higher stiffness than unfilled PA12 are required.

Glass-fiber loading, heat stabilization, and the FWA suffix

The 30 % glass-fiber loading is a chopped-strand reinforcement, not a continuous-fiber architecture. It produces anisotropic shrinkage and orientation effects in thin walls; flow-direction modulus and strength are higher than transverse values. The H designation in the grade name corresponds to a heat-stabilized PA12 formulation, and the natural color is unpigmented. Thermal endurance for heat-stabilized PA12 is not expressed as a single universal continuous-use temperature; comparative data are developed according to ISO 2578 or IEC 60216 and depend on part thickness, oxygen access, and peak temperature. The FWA suffix is a raw-material declaration tool, not a migration clearance. For European food-contact use, the molded article must still satisfy EC 1935/2004 and EC 10/2011; for United States food-contact use, 21 CFR 177.1500 applies to the finished article under the intended time-temperature conditions. Drinking-water components may additionally require product-specific evaluation under NSF/ANSI 61, KTW-BWGL, or ACS depending on the sales region.

What dry-as-molded mechanical values define LBV-30H FWA nat?

The table reproduces typical producer values for dry-as-molded specimens; the figures are not specification minima and should not be used as release limits. Specimens are injection molded using a standard multi-purpose tool according to ISO 20753 and tested at 23 °C unless otherwise indicated.

These values indicate a material with tensile modulus roughly four times that of unfilled PA12 and a heat deflection temperature approximately 110 °C to 120 °C above the unfilled matrix. The low strain at break of 3.0 % confirms that the compound is selected for rigidity and dimensional stability rather than high elongation. Fiber orientation in short flow paths can raise flow-direction tensile modulus by 10 % to 20 % above the datasheet value, while transverse impact may fall below the reported value.

When molded parts must combine low water uptake with 30 % glass reinforcement

PA12 contains fewer amide groups per unit chain length than PA6 or PA66, so the equilibrium moisture uptake of the matrix is lower. At 23 °C and 50 % relative humidity, PA12 absorbs approximately 0.7 % water, PA6 2.5 % to 3.0 %, and PA66 2.3 % to 2.8 %. The practical effect is a smaller shift in stiffness and dimensions when a component moves from dry storage to humid service. Applications such as compressed-air push-in fittings, automotive quick connectors, and fuel-vapor management components benefit from this retention of mechanical properties in the presence of moisture.

A second differentiator is chemical stress-cracking resistance. PA12 is less susceptible to stress cracking in the presence of zinc chloride and calcium chloride road-salt solutions than PA6 or PA66, which is relevant for underbody clips and fluid connectors exposed to winter road chemicals. Compared with unfilled PA12, the 30 % glass-fiber compound raises tensile modulus and heat deflection temperature but reduces notched impact strength and creates anisotropic mold shrinkage. Compared with PA6 GF30 and PA66 GF30, the PA12 GF30 grade has a lower density, lower dry tensile modulus, and lower heat deflection temperature but offers better moisture stability and chemical resistance.

Fuel system quick connectors and vapor lines manufactured from 30 % glass-filled PA12 are commonly tested for hydrocarbon permeation and pressure cycling under SAE J2044 and SAE J2045. Pneumatic push-in fittings are evaluated for burst pressure and pull-out force under ISO 14743; the glass-fiber reinforcement increases the fitting’s resistance to radial expansion. Cable conduits and electrical enclosures use the grade where impact toughness and dimensional stability under outdoor humidity outweigh the need for high dielectric performance. In food-processing machinery, FWA grades are specified for housings that must withstand cleaning agents; however, the final article must be tested under the relevant food-contact regulation with the actual food simulant.

The operational boundary of this grade is not set by short-term dry tensile values but by the combined effects of absorbed water and temperature. In hot-water or steam environments above 80 °C, hydrolysis can reduce molecular weight and impact strength over time; published data for this specific configuration in continuous hot-water service are limited. Design calculations for load-bearing parts should therefore use conditioned data generated at the in-service humidity and temperature, not dry-as-molded data.

Before conversion, the granulate must be dried to a residual moisture level below 0.10 %. A desiccant dryer with a dew point at or below −30 °C is preferred; producer guidance is 60 °C to 80 °C for 4 h to 8 h. Subjecting the material to longer drying at 80 °C may discolor natural grades and reduce FWA visual quality. On a standard three-zone injection screw with an L/D ratio of 20:1 to 25:1, the melt temperature measured at the nozzle should remain within 240 °C to 290 °C. Back pressure is normally set between 30 bar and 60 bar; higher back pressure can improve melt homogeneity but may fracture glass fibers and lower notched impact strength. Mold temperature should be maintained between 60 °C and 100 °C. If hot-runner systems are used, the manifold and nozzle heaters should be balanced to avoid dead spots; stagnant melt at the high end of the processing window can generate black specks and surface splay. Regrind from sprues and runners can be reintroduced at up to 20 % by weight if thoroughly dried, but fiber attrition reduces impact performance, and impact-critical parts should be evaluated at the intended regrind ratio. Production-scale troubleshooting generally targets shot-to-shot melt temperature variation within ±5 °C; larger swings create visible surface inhomogeneity in unpigmented grades.

Compliance declarations are start-point documents, not finished-part approvals.

Raw-material compliance with REACH and RoHS recast 2011/65/EU with delegated directive (EU) 2015/863 addresses the presence of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers. The supplier declaration must be reviewed at lot level if the final part is sold into the European Union. The FWA food-contact statement does not automatically clear the finalized article under EC 10/2011; overall migration and specific migration limits depend on contact time, temperature, food simulant, and surface-to-volume ratio. For water-contact articles, NSF/ANSI 61 certification is issued to the finished product, not to the polymer granulate. Therefore, engineering specifications should treat raw-material declarations as necessary inputs, but they cannot replace end-article testing.