| HS Code | 733844 |
| Density | 1.28 g/cm³ |
| Tensile Strength | 150 MPa |
| Elongation At Break | 2.5% |
| Flexural Strength | 200 MPa |
| Flexural Modulus | 6500 MPa |
| Notched Impact Strength | 15 kJ/m² |
| Melting Point | 184 °C |
| Heat Deflection Temperature 1 8 Mpa | 170 °C |
| Water Absorption 24h | 0.3% |
| Mold Shrinkage | 0.2-0.5% |
| Dielectric Strength | 20 kV/mm |
| Volume Resistivity | 10¹⁵ Ω·cm |
As an accredited Shandong Guangyin 1212 Reinforced Nylon factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Shandong Guangyin 1212 Reinforced Nylon is supplied in sealed, moisture-proof lined bags, net weight 25 kg per bag. |
| Container Loading (20′ FCL) | 20′ FCL: reinforced nylon pellets loaded in sealed bags/pallets, evenly distributed and secured to prevent shifting during transit. |
| Shipping | Shandong Guangyin 1212 Reinforced Nylon ships as non-hazardous resin in sealed moisture-proof bags or drums to prevent water absorption. Transport via closed containers, keeping dry and protected from damage. Avoid direct sunlight and high temperatures. Handle gently during loading/unloading, with proper labeling and documentation for safe, efficient delivery. |
| Storage | Store Shandong Guangyin 1212 Reinforced Nylon in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep in original sealed packaging or airtight containers to prevent moisture absorption. Avoid contact with strong oxidizers and incompatible chemicals. Maintain moderate humidity and stable temperature to preserve mechanical properties. |
| Shelf Life | Shelf life is typically 2 years when stored in a cool, dry place away from sunlight and moisture. |
In automotive coolant-circuit injection moulding, a 30 wt% short-glass-fibre PA1212 compound based on Shandong Guangyin 1212 resin is processed at melt temperature 265–285 °C and mould temperature 80–100 °C for thermostat housings, water pump impellers and coolant return elbows. Pre-drying at 80 °C for 6 h in a closed-loop dehumidifying dryer to ≤0.08 wt% moisture is mandatory; retained moisture above 0.10 wt% reduces melt viscosity and creates gate blush, splay and internal porosity. In production-scale trials on a 250-tonne hydraulic injection moulding machine with a 24-cavity hot-runner mould, flash and sticking at the valve gate pins were traced to back pressure below 0.4 MPa. The compounding formulation comprises 68.3 wt% PA1212 resin, 30.0 wt% chopped E-glass fibre, 0.5 wt% copper iodide/potassium bromide heat stabilizer masterbatch, 1.0 wt% carbon black masterbatch and 0.2 wt% calcium stearate; production regrind is limited to 15 wt% of total shot weight because glass-fibre length attrition beyond that threshold reduces notched Izod impact by 20% or more. The downstream injection process uses a three-zone screw with L/D 20:1, compression ratio 2.5:1, back pressure 0.4–0.6 MPa, shot cushion 3–5 mm and profiled injection speed 40–60 mm/s for the first 80% of fill. Coolant-exposed parts are validated to ASTM D638-22 tensile modulus ≥5,800 MPa, ISO 527-2:2012 tensile stress at break ≥90 MPa, ISO 180:2023 Charpy notched impact at −40 °C of ≥6.5 kJ/m², and ISO 175:2010 immersion in 50/50 ethylene glycol/water at 105 °C for 1,000 h with tensile-strength retention ≥75%. Terminal finished product types include thermostat housing bodies, water pump impellers, heater core return elbows and transmission oil cooler adapter flanges.
For quick-connect fuel vapour lines and evaporative-emission canister ports, a GF30 PA1212 grade compounded with 8.0 wt% maleated SEBS impact modifier is pre-dried at 80 °C for 5–6 h to ≤0.06 wt% moisture and injection moulded at melt temperature 250–270 °C and mould temperature 70–90 °C. The formulation consists of 59.2 wt% PA1212 resin, 30.0 wt% short glass fibre, 8.0 wt% maleated SEBS, 2.0 wt% carbon black masterbatch, 0.5 wt% hindered phenolic antioxidant and 0.3 wt% calcium stearate. The SEBS phase raises notched Izod impact at −40 °C from approximately 6.0 kJ/m² to 9.5 kJ/m², but lowers tensile strength by 10–12%; therefore the formulation is restricted to non-structural connector bodies and is not transferred into coolant-circuit brackets. The downstream process uses a non-return valve injection unit with short screw L/D 18:1 to limit fibre attrition, vented mould cavities with 0.02–0.04 mm vent depth, and clamp force set to 0.4 kN/mm² of projected cavity area. Qualification references SAE J2044 quick-connect requirements, SAE J2260 for non-metallic fuel system tubing assemblies, and ASTM D256-23 for notched Izod impact at −40 °C. Terminal finished product types include fuel vapour quick-connectors, carbon canister purge valve housings, fuel sender flanges and evaporative leak-check module bodies.
On textile shuttle looms, glass-filled PA1212 is specified for shuttles, bobbin holders and tension gate slides where unlubricated sliding against chromed steel occurs at surface pressure 0.6–1.4 MPa and speed 0.2–0.6 m/s. To reduce slip-stick without sacrificing load-bearing capacity, the compound is formulated with 58.8 wt% PA1212 resin, 30.0 wt% short glass fibre, 10.0 wt% PTFE micropowder, 1.0 wt% ultra-high-molecular-weight silicone fluid and 0.2 wt% hindered phenolic antioxidant. The PTFE is fed downstream of the glass-roving side stuffer in a twin-screw extruder with L/D 40:1 to preserve fibrillar morphology; barrel zones are held at 250–275 °C, screw speed 300–350 rpm, and vacuum degassing at −0.08 MPa removes low-molecular volatiles. In production-scale compounding on a 65-mm twin-screw line, downstream PTFE feeding maintains melt temperature within 5 °C of setpoint, while upstream addition produces torque and melt-pressure instability. Comparative wear behaviour is evaluated under ASTM D3702-94 at PV 0.5 MPa·m/s; published data for this specific formulation is limited, so a non-PTFE GF30 control must be tested in parallel before product release. The downstream injection process requires pre-drying at 80 °C for 6 h, melt temperature 260–280 °C, mould temperature 90–100 °C and abrasion-resistant screw and check-ring surfaces. Terminal finished product types include rapier loom shuttles, bobbin carriers, knitting-machine needle guides and conveyor chain guide rails.
| Application scenario | PA1212 resin content | Reinforcement content | Primary functional additive | Regrind limit |
|---|---|---|---|---|
| Coolant circuit components | 68.3 wt% | 30.0 wt% chopped E-glass | 0.5 wt% CuI/KBr stabilizer | 15 wt% |
| Fuel vapour connectors | 59.2 wt% | 30.0 wt% short glass fibre | 8.0 wt% maleated SEBS | 10 wt% |
| Textile loom wear parts | 58.8 wt% | 30.0 wt% short glass fibre | 10.0 wt% PTFE micropowder | 15 wt% |
| EV connector housings | 68.5 wt% | 30.0 wt% short glass fibre | 1.0 wt% carbon black masterbatch | 15 wt% |
| Pneumatic cylinder components | 68.2 wt% | 30.0 wt% short glass fibre | 1.2 wt% carbon black masterbatch | 15 wt% |
| Oil-exposed engine components | 63.0 wt% | 35.0 wt% short glass fibre | 1.0 wt% CuI/KBr stabilizer | 10 wt% |
Because glass-fibre orientation at the weld line of a high-voltage connector body controls comparative tracking index and impact behaviour, mould trials for PA1212 GF30 typically position the gate away from the terminal retention slot and use a sequential valve-gated hot runner to move the knit line into the low-stress housing wall. The compound for charge inlet housings and DC-DC converter baseplates comprises 68.5 wt% PA1212 resin, 30.0 wt% short glass fibre, 1.0 wt% carbon black masterbatch, 0.3 wt% hindered phenolic antioxidant and 0.2 wt% calcium stearate; no halogenated flame retardant is used because the finished part is typically classified UL 94 HB at 1.5 mm. The downstream injection process uses pre-drying at 80 °C for 4–6 h to ≤0.06 wt% moisture, melt temperature 260–285 °C, mould temperature 85–100 °C, and sequential valve gate timing delayed 0.3–0.8 s between zones. Production-scale failure modes include sink marks above terminal bosses when holding pressure falls below 35 MPa and flash at the parting line when multi-cavity clamp force is uneven. Electrical testing follows IEC 60112:2020 Method A for comparative tracking index, with typical GF30 long-chain polyamide values between 450 V and 600 V depending on glass loading and surface contamination; IEC 60664-1 creepage and clearance assignments are derived from the measured CTI category. Moisture-conditioned dimensional stability is checked under ISO 62:2008, with 23 °C water uptake for GF30 PA1212 generally below 1.0 wt% at saturation. Terminal finished product types include high-voltage battery connector housings, charge inlet shells, DC-DC converter baseplates and power distribution unit brackets.
In pneumatic cylinder end caps and piston retainer rings, a GF30 PA1212 compound is selected for pressure-cycling resistance rather than monotonic tensile strength. The formulation comprises 68.2 wt% PA1212 resin, 30.0 wt% short glass fibre, 1.2 wt% carbon black masterbatch, 0.4 wt% copper-based stabilizer and 0.2 wt% calcium stearate; regrind is restricted to 15 wt% because fatigue crack initiation at fibre ends becomes more probable with repeated use of thermally degraded runner scrap. Pre-drying at 80 °C for 6 h to ≤0.06 wt% moisture is followed by injection moulding at melt temperature 260–280 °C, mould temperature 85–100 °C, holding pressure 40–60 MPa and slow screw retraction at 60–80 rpm to avoid air entrapment at thread inserts. Testing is conducted under ISO 4414:2010 pneumatic system design rules, with cyclic pressure loading at 12 bar for 1×10⁶ cycles at 23 °C and 5×10⁵ cycles at 80 °C. Creep performance is assessed by ISO 899-1:2017 at 60 °C and 20 MPa, with creep modulus after 1,000 h remaining above 2,300 MPa. Terminal finished product types include tie rod cylinder end caps, piston retainer rings, flow control valve bodies and manifold subplates.
In engine oil environments at continuous temperature 120–140 °C, a 35 wt% glass-reinforced PA1212 compound based on Shandong Guangyin 1212 resin is substituted for PA66 in timing chain tensioner arms because long-chain polyamides exhibit lower moisture and oil-ageing dimensional change. The compounding formulation comprises 63.0 wt% PA1212 resin, 35.0 wt% short glass fibre, 1.0 wt% copper iodide/potassium bromide heat stabilizer masterbatch, 0.5 wt% carbon black masterbatch and 0.5 wt% calcium stearate. The higher glass loading shifts heat distortion temperature under ASTM D648-18 at 1.82 MPa to 185–200 °C; published data for the exact supplier grade at this loading is limited and must be verified on production lots. The downstream process uses pre-drying at 85 °C for 6–8 h to ≤0.05 wt%, melt temperature 270–290 °C, mould temperature 100–120 °C, and post-mould annealing at 160 °C for 2 h in nitrogen to increase crystallinity and reduce warpage after machining. Dimensional stability is measured according to ISO 175:2010 immersion in SAE 5W-30 oil at 140 °C for 1,000 h; maximum acceptable volume change is ±1.5%, and tensile-strength retention should exceed 80% under ISO 527-2:2012. Terminal finished product types include timing chain tensioner arms, cam cover oil separator plates, balance shaft chain guides and engine front cover brackets.
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Shandong Guangyin 1212 Reinforced Nylon is a compounded polyamide 1212 resin incorporating discontinuous glass fiber reinforcement. The numeric model designation 1212 identifies the polyamide backbone derived from dodecanedioic acid and 1,12-dodecanediamine, not the filler mass fraction. The reinforcement level is order-specific; a nominal 30 wt% short-glass-fiber configuration is the most common injection-molding grade. The product is supplied in cylindrical pellets, packaged in foil-lined bags after desiccant drying to a moisture content below 0.08%. The matrix contains a longer aliphatic sequence between amide linkages than polyamide 6 or polyamide 66, which lowers equilibrium moisture uptake and reduces hygroscopic dimensional drift. Published data for the specific Shandong Guangyin 1212 Reinforced Nylon configuration is limited; quantitative values in this description are representative of short-glass reinforced PA1212 grades and require confirmation against the vendor lot certificate.
Differentiation is observed principally in moisture absorption, heat deflection temperature, and dry-state mechanical efficiency. The crystalline melting point of PA1212 is approximately 186 °C, which places the matrix between PA12 at 178 °C and PA66 at 262 °C. Saturated water absorption at 23 °C for PA1212-GF30 is typically 1.4% to 1.8%, whereas PA66-GF30 can reach 5.5% to 7.0% and PA12-GF30 absorbs 1.2% to 1.6%. The reinforced PA1212 grade therefore provides the low-moisture response of long-chain aliphatic nylons while retaining higher tensile strength than PA12-GF30. Compared with PA66-GF30, it sacrifices approximately 15% to 20% of dry tensile strength and about 40 °C of heat deflection temperature under 1.8 MPa load, but it offers lower density, reduced water uptake, and improved dimensional stability in humid automotive environments. At 50% relative humidity, PA1212-GF30 typically absorbs below 1.0% moisture and retains at least 85% of dry tensile modulus; PA66-GF30 can absorb above 2.5% under the same conditions and shows a larger post-mold width growth. Low-temperature impact is also distinct: PA1212-GF30 retains notched Charpy values above 10 kJ/m² at −30 °C in well-coupled formulations, whereas standard PA66-GF30 may drop to 8 kJ/m² to 10 kJ/m² depending on glass sizing and moisture state.
Representative dry-as-molded property ranges for 30 wt% short-glass reinforced polyamides are provided below for engineering comparison.
| Property | PA1212-GF30 | PA66-GF30 | PA12-GF30 | Test method |
|---|---|---|---|---|
| Density at 23 °C | 1.30 g/cm³ | 1.38 g/cm³ | 1.24 g/cm³ | ISO 1183-1:2019 |
| Tensile strength at break, dry | 150–170 MPa | 180–200 MPa | 110–130 MPa | ISO 527-2:2012 |
| Tensile modulus, dry | 9000–10000 MPa | 9500–10500 MPa | 7000–8000 MPa | ISO 527-2:2012 |
| Charpy notched impact at 23 °C | 10–14 kJ/m² | 9–13 kJ/m² | 12–16 kJ/m² | ISO 179-1:2023 |
| Charpy notched impact at −30 °C | 10–12 kJ/m² | 8–10 kJ/m² | 12–14 kJ/m² | ISO 179-1:2023 |
| Heat deflection temperature, 1.8 MPa | 180–195 °C | 235–250 °C | 160–175 °C | ISO 75-2:2013 method A |
| Water absorption, saturation, 23 °C | 1.4–1.8% | 5.5–7.0% | 1.2–1.6% | ISO 62:2008 |
| Mold shrinkage, flow/transverse | 0.15–0.25% / 0.35–0.50% | 0.20–0.35% / 0.50–0.70% | 0.20–0.30% / 0.40–0.55% | ISO 294-4:2018 |
Selection between PA1212-GF30 and PA66-GF30 is often driven by moisture conditioning requirements. PA66-GF30 parts require conditioning to achieve stable dimensions in humid service, whereas PA1212-GF30 reaches equilibrium moisture faster and at lower absolute water content. This is not a universal advantage; in dry environments, PA66-GF30 provides higher heat resistance and higher tensile strength at equal fiber loading. In low-temperature impact applications, PA12-GF30 may still be preferred because its lower glass transition and lower stiffness allow more ductile deformation at −40 °C. The reinforced PA1212 grade occupies the middle position: higher thermal stability than PA12-GF30 and lower water absorption than PA66-GF30.
Compounding is typically performed on a co-rotating twin-screw extruder having an L/D ratio of 40:1 to 48:1 and a side feeder for continuous glass roving. The screw configuration after the side feeder should rely on distributive mixing elements rather than high-intensity kneading blocks to limit fiber attrition. Feed glass length of 4.5 mm typically reduces to a number-average fiber length of 0.25 mm to 0.45 mm in the final pellet. Melt temperature during compounding is held at 245 °C to 255 °C; excursions above 270 °C initiate oxidative chain scission, evidenced by pellet yellowing, reduced notched impact, and a drop in melt viscosity. The compounded strand is water-bath cooled and pelletized to a nominal 3.0 mm. Residual moisture after compounding is lowered to below 0.08% before packaging.
On injection molding lines, the compound is pre-dried at 80 °C for 4 h to 6 h with a desiccant dryer supplying air at a dew point of −30 °C or lower when intake moisture exceeds 0.10%. Moisture content should be verified by Karl Fischer titration per ISO 15512:2019 rather than weight loss because glass sizing volatiles can interfere. A 1200 kN clamp-force injection molding machine with a 30 mm general-purpose screw typically runs a melt temperature of 245 °C to 255 °C, a mold temperature of 70 °C to 95 °C, injection speeds from 50 mm/s to 120 mm/s, and hydraulic hold pressures of 60 MPa to 90 MPa. Insufficient drying produces splay on part surfaces, brittle weld lines, and a 20% to 30% loss in Charpy notched impact. Screw recovery time instability and melt cushion variation above 0.5 mm are production-scale indicators of feed-throat bridging caused by static attraction between glass fibers and fine pellets. Regrind levels should not exceed 20 wt% without revalidation of tensile elongation at break and notched impact.
Tooling should address anisotropic shrinkage caused by fiber orientation. For a 2 mm wall thickness, mold shrinkage in the flow direction is typically 0.15% to 0.25%, while transverse shrinkage can reach 0.35% to 0.50%. Gate placement must minimize weld-line exposure; tensile strength in weld regions is 40% to 60% lower than in un-welded sections for short-glass reinforced polyamides. Vents should be sized at 0.01 mm to 0.02 mm depth to prevent flash while allowing gas escape. Hot runner systems should maintain 245 °C to 255 °C manifold temperatures and avoid dead spots with residence time above 6 min at melt temperatures above 250 °C. Crystallinity is influenced by mold temperature; the upper range of 95 °C increases crystallinity and improves heat resistance but can raise post-mold shrinkage.
Operational boundaries for reinforced PA1212 are determined by the amide linkage, the glass sizing, and the long aliphatic segment. The compound should not be specified for continuous service above 120 °C in air unless the heat stabilizer package is explicitly stated. It retains tensile strength at 100 °C better than PA12-GF30, while its continuous-use ceiling remains below that of heat-stabilized PA66-GF30 at 180 °C to 200 °C. Contact with zinc chloride solutions, strong mineral acids, or hot glycol above 120 °C degrades the polymer and should be excluded. Hydrolysis in high-pressure steam occurs at the amide linkage; repeated steam sterilization requires a minimum 50% derating of tensile stress. The low moisture uptake does not remove the need for drying before melt processing: the polymer is not hygroscopically inert, and moisture levels above 0.10% generate hydrolysis during plastication. At 50% relative humidity and 23 °C, equilibrium moisture in PA1212-GF30 is below 1.0%, limiting the glass transition depression seen in PA66. This is why gears, clips, and pump housings can hold post-mold dimensions in humid warehouses without the conditioning step often required for PA66. However, published data for this specific Shandong Guangyin configuration is limited; lot-specific accelerated aging at end-use humidity and temperature is required before final release.
Parts exposed to chloride-containing road spray should be evaluated for environmental stress cracking resistance under ISO 22088-1:2006 or an equivalent end-user specification. Glass-fiber sizing chemistry also influences chemical resistance. Amino-silane coupling agents commonly used on glass surfaces can react with residual moisture and acidic contaminants, reducing interfacial strength and lowering fatigue resistance in cyclic loading. Therefore, retention of mechanical properties after chemical exposure should be verified using ISO 527-2:2012 tensile specimens aged according to the end-use fluid and time-temperature profile.
Applications suited to the reinforced PA1212 product include automotive underhood clips, fuel-line retainers, cable tie mounts, pump housings, and gear wheels where dimensional stability in humid air outweighs dry tensile strength. The compound’s lower moisture uptake compared with PA66-GF30 reduces post-mold warpage in parts with 2 mm to 4 mm wall thickness. Electrical performance varies with formulation: unreinforced PA1212 typically carries a comparative tracking index above 600 V per IEC 60112:2020, while glass-filled versions commonly fall between 400 V and 600 V. Flammability of the natural reinforced grade is generally UL 94 HB; flame-retardant versions require separate designation and evaluation under IEC 60695-11-10. Regulatory compliance must be confirmed through the supplier, because REACH and RoHS restrictions apply to the glass sizing, heat stabilizers, and processing aids. The base polyamide 1212 may be listed in FDA 21 CFR 177.1500, but the reinforced compound with coupling agents and glass fiber requires separate end-use suitability under the intended food-contact conditions.
