| HS Code | 593737 |
| Material | Polyamide 11 (PA11) |
| Glass Fiber Content | 7% |
| Density | 1.08 g/cm³ |
| Melting Point | 189 °C |
| Glass Transition Temperature | 45 °C |
| Water Absorption 24h At 23 C | 0.9% |
| Tensile Strength | 50 MPa |
| Tensile Modulus | 1900 MPa |
| Elongation At Break | 20% |
| Flexural Modulus | 1600 MPa |
| Charpy Notched Impact 23 C | 7 kJ/m² |
| Vicat Softening Temperature | 160 °C |
| Heat Deflection Temperature 0 45 Mpa | 75 °C |
| Heat Deflection Temperature 1 80 Mpa | 55 °C |
As an accredited Arkema Rilsan BZM 7 O TL PA11-GF7 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Arkema Rilsan BZM 7 O TL PA11-GF7 is supplied as a 25 kg pelletized grade, packed in moisture-proof sealed polyethylene-lined bags. |
| Container Loading (20′ FCL) | 20′ FCL: Rilsan BZM 7 O TL PA11-GF7 packed in sealed bags on pallets, securely stowed for safe transport. |
| Shipping | Arkema Rilsan BZM 7 O TL PA11-GF7 is shipped as non-hazardous polymer granules. Product is packed in sealed, moisture-resistant bags to prevent absorption. Store dry, away from heat and direct sunlight. Normal transport conditions apply; avoid excessive humidity and rough handling to maintain material integrity and flow properties. |
| Storage | Store Arkema Rilsan BZM 7 O TL PA11-GF7 in its original, unopened packaging in a cool, dry, well-ventilated area. Protect from direct sunlight, heat, and moisture, as PA11 absorbs humidity. Ideal temperature below 30°C. Reseal tightly after use and process dried material promptly to ensure optimal performance. |
| Shelf Life | Shelf life is typically indefinite when stored in original sealed packaging, in a cool, dry place away from moisture and direct sunlight. |
Among automotive liquid-fuel quick-connector systems, Arkema Rilsan BZM 7 O TL PA11-GF7 is selected for injection-molded coupling bodies, retainer clips, and bracket assemblies in which dimensional stability after thermal cycling and fuel exposure controls latch retention. The 7 wt% short-glass reinforcement lowers mold shrinkage relative to unfilled PA11; shrinkage measured under ISO 294-4 typically falls between 0.7% and 1.1% when mold temperature is maintained between 40°C and 80°C. Pre-drying is set at 80°C for 4 h to 8 h with desiccant-air dew point below −30°C, targeting residual moisture below 0.08% by ISO 15512. Barrel profiles from rear zone to nozzle are held between 230°C and 265°C, with hot-runner manifolds at 250°C; injection velocity on production equipment is typically 80 mm/s to 150 mm/s, and hold pressure is 50 MPa to 80 MPa in 80 t to 120 t hydraulic injection molding machines with screw compression ratio 2.5:1. Molded wall sections from 1.5 mm to 4.0 mm minimize glass-fiber orientation gradients, while gate placement on non-appearance bosses prevents weld lines in the latch retention zone. In fuel systems conforming to SAE J2044, the PA11 backbone lowers permeation relative to typical PA6/PA66 connector bodies, although complete system permeation remains tube- and seal-dependent under SAE J2260. Thermal shock validation under ISO 16750-4 commonly imposes 1,000 cycles from −40°C to 115°C; field-relevant failure modes include zinc-chloride stress cracking of underbody clips from road-salt brine. Polyamide materials stressed under load can crack in contact with concentrated zinc chloride; adjacent metal clip brackets are therefore coated or isolated. Continuous immersion in methanol-containing fuels above 15 vol% at service temperatures above 60°C requires specific validation because of polyamide polarity changes.
At −40°C, retention force in compressed-air push-in fittings depends more on notch sensitivity at collet retention features and release-button dimensional stability than on bulk tensile strength. The polyamide 11 matrix in Arkema Rilsan BZM 7 O TL retains a sub-50°C glass-transition temperature, so the short-glass 7 wt% reinforcement increases flexural modulus without inducing the low-temperature brittle failure characteristic of higher glass loadings. Molded fitting bodies, collet retainers, and release sleeves are processed with the melt stream entering through a non-functional boss so that the weld line does not form through the collet retention window; production tools with 12 to 24 cavities on 100 t vertical-clamp machines require cavity-to-cavity fill variation below 5% to hold seat diameter scatter under 0.03 mm. Moisture uptake at 23°C and 50% RH remains below 1.5% under ISO 62, which limits dimensional growth of release collars after 1,000 h in 85°C/85% RH conditions. Pneumatic circuit validation follows DIN 73378 for tubing and ISO 14743 for push-in connector performance, with burst testing at 3× rated pressure at 23°C and leak testing at −40°C after thermal aging. A recurring production failure mode is stress cracking caused by thread sealants with active amine accelerators; anaerobic compounds must be screened by residual torque after 72 h contact under ISO 16047. The lower equilibrium moisture content relative to PA6 also reduces hydrolysis-related hardness loss in compressed-air lines operating with water contamination at 90°C.
| Process variable | Observed production range | Upper/lower control limit | Test or control method |
|---|---|---|---|
| Drying residual moisture | <0.08% | 0.12% triggers splay and viscosity loss | ISO 15512 |
| Melt temperature at nozzle | 240°C–260°C | 270°C increases yellowing | IR pyrometer |
| Mold cavity temperature | 40°C–80°C | Below 30°C lowers crystallinity and impact | Thermocouple |
| Hold pressure | 50–80 MPa | Above 90 MPa creates flash | Pressure transducer |
| Back pressure | 0.5–1.5 MPa | Above 2 MPa degrades glass fiber length | Machine setting |
Because low-voltage battery-management wiring and industrial cable glands require halogen-free insulating components with stable creepage protection and low moisture distortion, Arkema Rilsan BZM 7 O TL PA11-GF7 is injection molded into connector backshells, cable-gland bodies, and mounting brackets for circuits up to 48 V DC. Comparative tracking index testing under IEC 60112 on unreinforced PA11 is frequently reported near 600 V; the 7 wt% glass reinforcement can reduce the CTI to 400 V–600 V depending on surface contamination and mold-release residue, so mold release agents that migrate to the surface must be avoided. Volume resistivity for dry-as-molded specimens exceeds 1 × 10^13 Ω·cm under IEC 62631-3-1, and the low equilibrium moisture content limits the increase in surface leakage current after 500 cycles of damp-heat conditioning from −40°C to 85°C. Threaded cable-gland bodies are gated with valve gates or overlapping edge gates to prevent weld lines at the thread root; hot-runner systems with 8 to 16 cavities maintain roundness within 0.05 mm for seal compression. The unreinforced base polymer is rated HB at 1.5 mm under UL 94, which limits use to low-voltage enclosures and secondary insulating brackets rather than unattended high-current arc paths. Glow-wire requirements under IEC 60695-2-11 must be established for the specific wall thickness and color batch, because published data for this specific GF7 configuration is limited. For electrical connectors exposed to oil mist, comparative tracking index testing after thermal shock under IEC 60068-2-14 provides more relevant data than virgin-specimen CTI alone.
In off-highway hydraulic and fuel-system covers, Arkema Rilsan BZM 7 O TL PA11-GF7 is substituted for PA6-GF30 only where lower dry-as-molded tensile modulus is offset by reduced humidity-induced warpage. The tensile modulus of a 7 wt% glass-fiber PA11 typically remains below 2,200 MPa under ISO 527-2/1A, and PA6-GF30 is significantly stiffer in dry-as-molded specimens; as a result, load-bearing rib height or wall thickness is increased by a factor of 1.3 to 2.0 when stiffness governs panel deflection. Mold temperature is reset from 80°C–90°C for PA6-GF30 to 40°C–60°C for PA11-GF7, and nozzle melt temperature is reduced by 15°C to 25°C to avoid stringing at hot-runner drops. Fluid resistance is assessed by ISO 175 immersion for 28 days at 60°C in HLP 46 mineral oil, diesel fuel, and calcium chloride solution; OEM protocols frequently require tensile-strength retention above 85% after immersion. In hydraulic manifold covers, continuous service above 2 MPa hydrostatic pressure at 80°C requires long-term creep validation because the grade is not a pressure-boundary material. Vibration resistance is evaluated under ISO 16750-3 random profiles from 10 Hz to 2,000 Hz at 25 m/s² RMS, with particular attention to glass-fiber orientation in corner bosses where field cracking occurs after stress-relaxation of insert-loaded threads. The PA11 backbone provides lower water absorption than PA6, which reduces the seasonal warpage observed on wide covers exposed to 85% RH environments; however, sulfuric acid and concentrated zinc chloride remain outside the acceptable service envelope.
Low-pressure chemical-transfer pump wear rings, valve actuator guide bushings, and impeller trim spacers are molded from Arkema Rilsan BZM 7 O TL PA11-GF7 where resistance to seawater, aliphatic hydrocarbons, synthetic-ester lubricants, dilute alkali, and diesel is more important than high hardness. The 7 wt% glass reinforcement improves sliding-wear behavior relative to unfilled PA11 against stainless steel shafts, but specific wear factors must be generated on block-on-ring geometry under ISO 7148-1 because published data for this GF7 configuration is limited. Water absorption at saturation remains near the PA11 range of 1.4%–1.8% under ISO 62, so dimensional change in water-glycol circuits at 70°C is lower than that of PA66 equivalents. Injection molding of thick sections above 4 mm requires extended holding time to reduce sink against hot core pins, and post-mold annealing at 100°C for 2 h in circulating air increases crystallinity and wear resistance. The material is not recommended in strong acids, phenols, ortho-chlorinated solvents, or concentrated zinc chloride solutions because these reagents attack the amide linkage or promote environmental stress cracking. Molded blanks that are subsequently machined should use carbide tooling with coolant to prevent surface melting at thread-opening cuts; exposed glass fibers after machining reduce fatigue strength unless a final heat treatment closes the surface.
Directionally, injection-molded outdoor recreational hardware uses Arkema Rilsan BZM 7 O TL PA11-GF7 for ski binding toe and heel components, bicycle frame protection clips, trekking pole friction rings, and off-road vehicle snap-fit body panels because the material removes the brittle low-temperature failure observed in PA6-GF30 at −30°C. Notched Charpy impact under ISO 179-1/1eA remains sufficiently ductile at −30°C to avoid ski-binding release-mechanism fracture during edge loading, though specific values must be confirmed on the final molded part because gate orientation and weld lines control the crack path. Outdoor weatherability is evaluated under ISO 4892-2 xenon-arc exposure for 1,000 h; carbon-black-stabilized grades show lower color shift than natural grades, and tensile-strength retention above 80% is the typical acceptance criterion. Snap-fit retention after 500 insertion-removal cycles requires the glass-fiber orientation to run parallel to the tensile surface of the cantilever arm, not across the hinge root; mold-fill simulation with anisotropic fiber orientation models is used to relocate the gate. In insert-molded ski binding screw bosses, a boss outside diameter of at least 2.5× the screw diameter and a ribbed base prevent insert pull-out under ISO 9462 binding release tests. Salt-spray exposure under ISO 9227 for 120 h is used to evaluate corrosion around metallic inserts; plating selection must account for galvanic contact with the polyamide surface. Production molds with textured surfaces should avoid external silicone-based release agents if subsequent pad printing or plasma pretreatment is required for adhesion.
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Arkema Rilsan BZM 7 O TL is a polyamide 11 compound designated PA11-GF7 under ISO 1043-1, with a nominal glass-fibre reinforcement of 7% by mass. The grade is supplied as black pellets and is stabilised against thermal and ultraviolet ageing. The PA11 matrix is synthesised from 11-aminoundecanoic acid derived from castor oil; the reinforcement is short E-glass fibre. The TL suffix is a commercial grade marker and does not denote a change in the PA11 backbone. Unlike plasticised PA11 types, BZM 7 O TL is not formulated with monomeric plasticiser, so it retains dimensional stability at elevated service temperatures but has reduced low-temperature flexibility compared with plasticised grades.
Table 1 lists manufacturer-published typical values for the compound. These values are not batch-release limits and should be confirmed against the current technical datasheet for the specific lot.
| Property | Typical value | Test method |
|---|---|---|
| Nominal glass-fibre content | 7% by mass | ISO 3451-1 |
| Density | 1.09 g/cm³ | ISO 1183-1 |
| Tensile modulus | 2200 MPa | ISO 527-1/-2 |
| Tensile stress at yield | 58 MPa | ISO 527-1/-2 |
| Tensile strain at yield | 4% | ISO 527-1/-2 |
| Nominal strain at break | 30% | ISO 527-1/-2 |
| Charpy notched impact at 23°C | 10 kJ/m² | ISO 179-1/1eA |
| Charpy notched impact at -30°C | 5.5 kJ/m² | ISO 179-1/1eA |
| Melting temperature | 189°C | ISO 11357-3 |
| Heat deflection temperature at 0.45 MPa | 150°C | ISO 75-2/B |
| Melt volume-flow rate at 235°C/2.16 kg | 8 cm³/10 min | ISO 1133-1 |
| Moulding shrinkage, flow direction | 0.6% | ISO 294-4 |
| Moulding shrinkage, transverse direction | 1.0% | ISO 294-4 |
At 7% by mass glass, the compound occupies a low-reinforcement position. It retains more ductility than PA11-GF30 but has a higher modulus than unfilled PA11. The glass fibres raise the tensile modulus from the unfilled PA11 range of approximately 1200 MPa to the published value of 2200 MPa; this is lower than the modulus of typical PA11-GF30 grades, which can exceed 5000 MPa. The yield strain of 4% limits snap-fit designs to deflections that are small compared with plasticised PA11 grades.
Rheologically, the melt volume-flow rate of 8 cm³/10 min at 235°C/2.16 kg places the material in an intermediate flow class. For thin-wall moulding, melt temperature should be raised to 260°C and injection velocity held above 120 mm/s to avoid premature frozen-layer formation. Weld lines are a processing boundary: because glass fibres do not bridge the melt interface, tensile strength at a weld line can fall to 55–65% of the unwelded value. Gate placement should therefore avoid high-load welds in snap-fit arms and pressure-retaining bosses.
Shrinkage is anisotropic. With a mould temperature of 40°C, typical linear mould shrinkage is 0.6% in the flow direction and 1.0% transverse as measured by ISO 294-4. Post-mould moisture uptake at 50% RH increases dimensions by approximately 0.2% in the flow direction and 0.3% transverse after 1000 h; published data for this specific configuration is limited. This dimensional shift is lower than that of PA6-GF7 under the same conditions because the amide group concentration of PA11 is lower.
The wet-conditioned tensile modulus of glass-filled polyamides is commonly 20–30% lower than dry values. Part designers should use the conditioned modulus for snap-fit and creep calculations rather than the dry as-moulded value. At 23°C and 50% RH, the equilibrium moisture uptake of PA11 is lower than that of PA6 and similar to or slightly higher than PA12; the glass fibre further reduces absolute moisture uptake per unit mass because the fibre does not absorb water.
Moisture control is critical. At pellet moisture above 0.10% measured by ISO 15512, hydrolysis during melt processing reduces molecular weight and generates surface splay. The drying window is 80–90°C for 4–6 h in a dehumidified-air dryer with a dew point no higher than -20°C. At ambient relative humidity above 60%, dried pellets should not remain in an open hopper for more than 1 h; closed hopper feeding with dry-air purge is recommended.
Melt temperature for injection moulding and extrusion should be maintained between 230°C and 270°C. Barrel profiles typically rise from 210°C at the feed throat to 250–260°C at the metering zone. At melt temperatures above 270°C, residence times above 5 min cause measurable yellowing and an increase in melt volume-flow rate due to chain scission. In hot-runner systems, manifold temperatures should not exceed 260°C, and gate shut-off delay should be minimised to avoid stagnation zones.
The 7% glass fibre is abrasive. For production runs above 500 h, nitrided steel or bimetallic barrel and screw surfaces are specified. Check-ring non-return valves should use hardened inserts with a surface hardness of at least 52 HRC. Extrusion screws with an L/D of 24:1 and a compression ratio of 3:1 are typical for corrugated-tube and profile lines; screw speeds on a 40 mm single-screw extruder are normally held between 30 rpm and 80 rpm depending on output.
Mould temperature should be controlled between 30°C and 60°C. Below 30°C, the frozen skin layer thickens and surface replication suffers; above 60°C, cycle time increases without a corresponding gain in crystallinity because the PA11 matrix crystallises rapidly. Dimensional checks should be made after conditioning for 24 h at 23°C/50% RH, because immediate as-moulded values are not representative of service geometry. Production line defects include gate splay from moisture, glass streaks from jetting, and black specks from degraded resin stagnation in hot-runner dead spots. Reducing injection velocity or raising melt temperature can reduce glass streaks; black specks require purging with a PA11 or PA6 purge compound.
In automotive fluid-line clips, cable-protection conduits, and pneumatic tube fittings, PA11-GF7 is selected where PA6-GF7 shows excessive moisture-induced dimensional change and where PA12-GF7 is not required for maximum chemical resistance. The stabilised black formulation is evaluated under ISO 4892-2 xenon-arc conditions; acceptance criteria for exterior grades typically require retention of at least 75% of tensile elongation after 500 h, but published data for BZM 7 O TL in this specific formulation should be taken from the manufacturer’s part-specific statement. Continuous immersion in hot water above 80°C is not recommended because polyamide hydrolysis accelerates with temperature and acidity. Contact with strong mineral acids, halogenated solvents at elevated temperature, and amine-based additives at processing temperatures should be avoided; amine-bearing additives can catalyse amide interchange or chain scission.
For electrical cable protection, the lower moisture uptake compared with PA6 reduces the risk of hydrolysis-induced brittleness in high-humidity enclosures. The grade is not electrically conductive; black pigmentation is achieved with carbon black, which may reduce surface resistivity relative to natural PA11 but does not provide antistatic protection unless the grade is explicitly formulated for that purpose. Users requiring surface resistivity below 10^9 Ω should specify a conductive or antistatic grade and verify by IEC 61340-5-1 or ASTM D257.
Regulatory documentation for BZM 7 O TL is supplied under REACH Regulation (EC) No 1907/2006 and the RoHS Directive 2011/65/EU. Polyamide 11 is covered by the polymer exemption in REACH, but additives and pigments require individual declaration. The carbon-black-based pigment does not contain the restricted heavy metals listed in RoHS; however, the end user must verify the current supplier safety data sheet because additive packages may vary by production site.
Fatigue and impact behaviour shift when PA11-GF7 is substituted for PA12-GF7. PA11 has a higher melting point and a higher amide group density than PA12; consequently, dry-as-moulded PA11-GF7 tends to have higher stiffness and better retention of mechanical properties against short-term heat. In low-temperature impact, PA11-GF7 retains notched Charpy values of 5.5 kJ/m² at -30°C by ISO 179-1/1eA, which is comparable to or slightly above typical PA12-GF7 values, but the comparison depends on plasticiser content and glass sizing. Published data for this specific configuration is limited.
The design strain for snap-fit assembly should not exceed 3.5% in dry mouldings and 4.5% after conditioning to 50% RH. At higher humidity, the yield stress of PA11-GF7 decreases by approximately 15–20% relative to dry values; this shift is smaller than the shift for PA6-GF7 but still requires allowance in insertion-force calculations. Creep behaviour under sustained load at 60°C must be evaluated using ISO 899-1 tensile creep tests; published data for this specific grade is limited, so part-specific validation is required for load-bearing brackets.
Compared with PA66-GF7, PA11-GF7 offers lower density, lower moisture absorption, and improved low-temperature impact, but it has lower tensile modulus and lower heat deflection under load. Where continuous service temperature exceeds 120°C, PA11-GF7 is not recommended without long-term thermal ageing data to ISO 527-2 after 1000 h. Compared with PA6-GF7, PA11-GF7 gives reduced equilibrium moisture uptake and less property shift between dry and conditioned states, but it typically carries a higher specific heat and lower crystallisation rate, which can increase mould cooling time if not compensated by mould temperature control.
In extrusion, PA11-GF7 is preferred over PA6-GF7 in small-diameter pneumatic tubing where dimensional stability in humid air matters. Die and calibration sizing must account for the anisotropic swell and shrink of the glass-filled melt; line speed and drawdown ratio should be established by trial on the production line because published data for this specific configuration is limited. Chemical resistance for fluid-contact applications should be tested according to ISO 175 using the actual service fluid and temperature, rather than inferred from neat-polymer data.
