| HS Code | 905246 |
| Product Name | Bada BADAMID PA12 H UV natural PA12, Conditioned |
| Base Polymer | Polyamide 12 (PA12) |
| Condition State | Conditioned (50% RH) |
| Additive System | Heat and UV stabilized |
| Color | Natural |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Tensile Strength At Yield | 42 MPa |
| Elongation At Break | >100% |
| Tensile Modulus | 400 MPa |
| Flexural Modulus | 850 MPa |
| Charpy Notched Impact Strength 23 C | 8 kJ/m² |
| Heat Deflection Temperature At 1 8 Mpa | 50 °C |
| Water Absorption At Saturation | 1.5% |
As an accredited Bada BADAMID PA12 H UV natural PA12, Conditioned factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in sealed, moisture-proof 25 kg polyethylene-lined bags to preserve conditioned PA12 pellets and prevent moisture absorption. |
| Container Loading (20′ FCL) | 20′ FCL: Bada BADAMID PA12 H UV natural loaded securely in dry, ventilated container, protected from moisture, UV, and contamination. |
| Shipping | Bada BADAMID PA12 H UV natural PA12 (Conditioned) ships as non-hazardous polyamide pellets. Ensure moisture-proof, sealed packaging to prevent hydrolysis. Store away from heat, sunlight, and contaminants. Transport via standard dry freight in clean, covered containers. Avoid excessive mechanical stress during handling. Keep dry and ventilated for optimal product integrity. |
| Storage | Store Bada BADAMID PA12 H UV natural PA12 (conditioned) in its original, tightly sealed container in a cool, dry, well-ventilated area. Protect from direct sunlight, heat sources, and moisture, as PA12 is hygroscopic and absorbs humidity. Maintain storage temperature below 40°C. Avoid contamination, dust, and mechanical damage. Use within manufacturer’s recommended shelf life. |
| Shelf Life | Store in original sealed packaging, cool and dry. Shelf life is typically two years from production date when stored properly. |
Because BADAMID PA12 H UV natural is supplied with heat and UV stabilisation already dispersed in the polymer matrix, extrusion of 6 mm to 16 mm outside-diameter air brake tubing does not require additional liquid heat stabiliser dosing at the extruder throat. The conformity-relevant matrix for this application is ISO 7628-1 for thermoplastic tubing in air braking systems and SAE J844 for nonmetallic air brake tubing in North America. In production, the resin is dried in a desiccant dryer at 80 °C for 4 h to 8 h to a residual moisture level below 0.10%, because moisture above this threshold generates surface bubbles and reduces melt strength in the calibration zone. When plant relative humidity exceeds 60%, transfer from dryer to hopper is kept below 30 min to prevent re-absorption from humid air, which produces the same surface defects within one hour. A grooved-feed single-screw extruder of 45 mm to 60 mm screw diameter with 30:1 to 33:1 L/D is preferred, with a compression ratio of 2.5:1 to 3.0:1. Barrel set points typically run from 220 °C in the feed zone to 245 °C in the metering zone, with a die temperature of 235 °C; melt temperature should not deviate by more than ±5 °C across the die circumference or ovality in 12 mm OD product exceeds the 0.15 mm tolerance required by downstream OEM line builders. Vacuum calibration at -0.2 bar to -0.4 bar and water temperatures of 20 °C to 40 °C are used to set crystallinity and final diameter. The formulation addition ratio on the production floor is 100 parts by weight of PA12 H UV natural; clean sprueless edge trim from the same grade may be reintroduced up to 15 wt% without invalidating heat aging, but only when the regrind has been re-dried to the same 0.10% moisture limit. Black masterbatch, when required for fleet specification, is added at 2 wt% to 4 wt%, using a PA12-based carrier to maintain chemical resistance. Terminal products include air brake lines with service pressures of 8 bar to 12.5 bar, suspension levelling lines, and transmission breather lines for heavy commercial vehicles.
In diesel fuel return and tank vent lines for commercial vehicles, the operating requirement is not tensile modulus but retention of notched impact at -40 °C after continuous exposure to diesel and biodiesel blends. PA12 H UV natural is processed as a monolayer or as the outer protective layer in coextruded constructions where a barrier layer is required for lower permeation. The controlling industry specification in European OEM drawings is the DIN 73379 series for polyamide tubing in vehicle fuel circuits, with additional verification under ISO 527-2 for tensile properties and ISO 179-1/1eA for notched Charpy impact on dry-as-moulded samples and on samples conditioned at 23 °C and 50% RH according to ISO 291. For monolayer diesel return lines, the addition ratio is 100 parts by weight of PA12 H UV natural; in coextruded structures the outer PA12 layer is specified at 0.25 mm to 0.40 mm wall thickness, while the barrier and tie layers are not part of this material. Regrind use above 15 wt% is not recommended for fuel contact layers because repeated heat history shifts melt flow rate measured at 235 °C and 2.16 kg per ISO 1133-1 outside the OEM control window. Extrusion lines for these tubes typically use a 30:1 L/D single-screw machine with vacuum drying to below 0.10% moisture, barrel profile of 230 °C to 250 °C, and a crosshead die with a 0.5 mm to 1.5 mm die gap. Post-extrusion vacuum sizing and a downstream laser micrometer are required because diesel return lines are frequently cut to ±1 mm length tolerances. Published validated permeation data for this specific natural UV H formulation across all biodiesel mixtures are limited; converter-level fuel ageing tests run according to the OEM specification remain the controlling pass-fail criterion. Terminal part types include 8 mm and 10 mm OD diesel return lines, fuel filler neck vent tubes, and underbody vapour lines clipped to chassis rails.
Insert overmolding of brass quick coupling bodies with PA12 H UV natural becomes unstable when the brass insert preheat temperature drops below 120 °C. The polymer freezes rapidly against the colder metal, producing weld lines around the insert that fail pressure cycling tests. The relevant product-level standard for cylindrical quick-action couplings is ISO 6150, which defines plug dimensions and leakage limits for working pressures of 10 bar, 16 bar, and 25 bar. On the compounding side, the formulation is kept simple: 100 parts by weight of PA12 H UV natural, regrind limited to 10 wt% to 15 wt%, and no external mould release because silicone-based releases migrate into the sealing face and create leak paths. If colouring is required, 2 wt% of PA12-carrier black masterbatch is used. Moulding equipment requirements shift toward hot-runner systems with individually controlled valve gates; melt temperature is held at 245 °C to 260 °C, mould temperature at 60 °C to 80 °C, and holding pressure at 500 bar to 700 bar for parts with 2.0 mm to 3.5 mm nominal wall thickness. The insert preheat temperature is more critical than barrel temperature because PA12 solidifies below 175 °C, and any brass surface below that threshold extracts latent heat too quickly. A two-stage injection profile with fast initial fill below 0.2 s and a short pack phase reduces gate blush while preventing sink marks at the metal-polymer interface. Terminal product types include pneumatic quick coupling bodies, plug housings, and threaded adapters used in compressed air distribution systems where zinc-free air purity classifications under ISO 8573-1 apply.
When outdoor cable ties are injection moulded from natural PA12 H UV, the acceptance criterion is not limited to flammable class UL 94 HB under UL 62275; retention of elongation after accelerated weathering under ISO 4892-2, method A, cycle 1 is the controlling parameter for photovoltaic and telecom installations. The standard moulding formulation for black outdoor parts is 100 parts by weight of PA12 H UV natural plus 2 wt% to 3 wt% of carbon black masterbatch in a PA12 carrier; natural parts omit the masterbatch but are limited to less severe UV exposure. Regrind from clean runner systems may be added up to 25 wt% only when the finished batch is subjected to UV retention testing, because the UV stabiliser package is diluted by repeated heat history. The injection moulding process uses a general-purpose screw with 20:1 L/D, melt temperature 245 °C to 255 °C, mould temperature 40 °C to 70 °C, and back pressure of 5 bar to 10 bar. Residual moisture must be below 0.10% before processing, with drying at 80 °C for 4 h to 6 h. Thin sections in cable tie heads create a shear-controlled process window: injection speed must be sufficient to fill the pawl without jetting, while excessive speed degrades the UV stabiliser at the gate. For EU installations, RoHS 2011/65/EU and REACH SVHC screening apply at finished component level. Batch-level verification at 1,000 h and 2,000 h under ISO 4892-2 is necessary because published data for this specific natural UV H formulation in cable tie geometries are limited. Terminal product types include outdoor cable ties, conduit clips, and spiral wrap retainers used in cable management trays where UV exposure is continuous and rework access is restricted.
Underhood harness clips moulded from PA12 H UV natural are evaluated for notched impact at -40 °C according to ISO 179-1/1eA, because the part must survive engine compartment vibration without cracking after aging in hot air at 125 °C per ISO 188. The automotive electrical connector performance specification USCAR-2 governs terminal retention, insertion force, and temperature cycling for the assembled connector, while the clip body itself is dimensionally validated using the OEM drawing and measured under ISO 291 standard atmosphere at 23 °C and 50% RH. The moulding ratio is 100 parts by weight of PA12 H UV natural; regrind is limited to 20 wt% and no external plasticiser or impact modifier is used unless specifically required by the OEM, because unsupported impact modification reduces heat aging and chemical resistance. Processing equipment includes a medium-sized injection moulding machine with clamp force calculated at 0.5 to 0.8 tonnes per square centimetre of projected area, barrel set points 240 °C to 260 °C, mould temperature 60 °C to 80 °C, and holding pressure 400 bar to 600 bar. The gate location is moved away from the snap-fit beam because weld lines in the beam reduce cold-impact performance by more than 30% in finished-part tests. The critical processing conflict is the narrow window between complete mould filling and degradation of the heat stabiliser: melt residence time above 260 °C should not exceed 5 min to 8 min, and short shots are avoided by maintaining a cushion of 3 mm to 5 mm. Terminal products include engine bay harness retainers, fuel line clips, and sensor connector brackets on heavy-duty trucks and agricultural machinery.
Competitive Bada BADAMID PA12 H UV natural PA12, Conditioned prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Bada BADAMID PA12 H UV natural PA12, Conditioned is a heat-stabilized and UV-stabilized polyamide 12 grade supplied in natural unpigmented form. The designation H identifies heat stabilization, UV identifies a weathering stabilization package, and “natural” indicates the absence of carbon black or added colour concentrates. In the conditioned state defined by ISO 291, test specimens are brought to moisture equilibrium at 23 °C and 50 % RH before mechanical characterization. The material is an unfilled semi-crystalline thermoplastic with a melting temperature near 178 °C measured by differential scanning calorimetry according to ISO 11357-3.
Conditioning is a specimen-preparation state, not a recommendation for melt processing. Under ISO 291, equilibrium moisture uptake for PA12 is approximately 0.7 % by weight. At water saturation at 23 °C per ISO 62, uptake rises to roughly 1.5 %. The absorbed water acts as a plasticizer in the amorphous regions of the polyamide, lowering tensile modulus and yield stress while increasing notched impact energy and strain at break. Dry-as-moulded specimens tested immediately after injection moulding typically show higher stiffness values, whereas conditioned values are considered more representative of long-term service in moderate indoor or outdoor climates.
The table below compares representative dry and conditioned property windows for a heat-stabilized, UV-stabilized PA12 natural compound. Values are typical midpoints from industrial data for this polyamide class and are not lot-specific specification limits. Acceptance testing must refer to the manufacturer’s current technical data sheet for the BADAMID PA12 H UV natural grade.
| Property | Test standard | Dry | Conditioned |
|---|---|---|---|
| Tensile modulus | ISO 527-2 | 1500 MPa | 1100 MPa |
| Yield stress | ISO 527-2 | 45 MPa | 38 MPa |
| Nominal strain at break | ISO 527-2 | >50 % | >50 % |
| Charpy notched impact at 23 °C | ISO 179-1/1eA | 5 kJ/m² | 8 kJ/m² |
| Charpy unnotched impact at 23 °C | ISO 179-1/1eU | no break | no break |
| Density | ISO 1183-1 | 1.01 g/cm³ | |
| Heat deflection temperature A | ISO 75-2 | 55 °C | 55 °C |
| Vicat softening temperature B50 | ISO 306 | 140 °C | 140 °C |
| Melting temperature, DSC | ISO 11357-3 | 178 °C | |
Time to reach equilibrium moisture content depends on specimen thickness and ambient conditions. For a 4 mm ISO multipurpose specimen at 23 °C and 50 % RH, several weeks may be required to achieve 0.7 % moisture. Accelerated conditioning per ISO 1110 uses forced-air exposure at 70 °C and 62 % RH until mass equilibrium. During the early phase of conditioning, moisture distribution is non-homogeneous; surface plasticization can create a gradient in tensile modulus through the cross-section. This is one reason standardized conditioning is specified before comparative mechanical testing.
In comparison with PA6 and PA66, the PA12 backbone carries a longer aliphatic segment, which reduces amide concentration and equilibrium moisture uptake. At 23 °C and 50 % RH, PA6 equilibrates near 2.8 % moisture and PA66 near 2.5 %, whereas PA12 absorbs approximately 0.7 %. The lower moisture uptake produces less dimensional swelling in variable-humidity environments and a smaller modulus shift between dry and conditioned states. For this reason, PA12 H UV natural is frequently selected for tight-tolerance connectors, cable conduits, pneumatic tubing, and clips exposed to water vapor or condensation where PA6 and PA66 would undergo larger hygroscopic expansion and greater stiffness loss.
The heat-stabilized H-modification contains an antioxidant system that slows thermo-oxidative degradation during melt processing and elevated-temperature service. Without heat stabilization, aliphatic polyamides can develop discoloration, molecular weight loss, and surface embrittlement after prolonged exposure to air at temperatures above approximately 80 °C. With heat stabilization, short-term continuous-use temperatures up to 100 °C are often referenced for PA12 compounds, but the permissible service temperature depends on load, part geometry, oxygen access, and chemical environment. Oven aging studies following ISO 188 are used to establish retained tensile strength and impact-time curves for acceptance testing.
Compared with an unmodified PA12 base resin, the H UV grade differs primarily by the presence of thermal and UV stabilizer packages. The stabilizer system can raise melt viscosity slightly, and a 5 °C to 10 °C higher melt temperature may be required to achieve equivalent injection filling. In natural unpigmented form, heat stabilization reduces yellowing during melt processing but does not eliminate colour shift after prolonged hot-air aging. The UV package does not significantly alter heat deflection temperature or Vicat softening temperature; those values remain controlled by the PA12 crystalline phase and by the moisture state of the test specimen.
The UV stabilization package in the natural grade is intended to reduce photo-oxidation of the polymer surface during outdoor exposure. Because the material is unpigmented, weathering performance depends more on hindered amine light stabilizer chemistry and UV absorbers than in carbon-black-pigmented equivalents. The relevant accelerated weathering procedure is ISO 4892-2 Method A using a xenon-arc source filtered for daylight. After 500 h to 1000 h, the natural grade can show measurable surface chalking and colour shift before bulk mechanical integrity is lost. Carbon-black-filled PA12 retains a higher proportion of surface gloss under the same exposure. Outdoor service life cannot be reduced to a single irradiance value because performance is governed by irradiance dose, humidity cycling, temperature, and part thickness.
Carbon-black-filled PA12 remains the reference for maximum outdoor weathering resistance because carbon black screens ultraviolet radiation efficiently. A natural UV-stabilized grade is therefore selected when light-coloured appearance is required, when pigmentation must be avoided, or when laser marking is part of the production process. The trade-off is a lower retention of surface gloss and a shorter time to visible yellowing under outdoor exposure. The difference is not primarily a bulk mechanical failure boundary in short-term testing; it appears as surface microcracking, colour drift, and reduced gloss measured according to ISO 2813 before a significant drop in tensile strength occurs. For exposed clips, cable conduits, or tubing, this surface-aging mode must be included in the qualification matrix.
Before melt processing, the granulate should be dried to a moisture level below 0.10 % by weight, as measured by ISO 15512, regardless of the conditioned testing state. Conditioning is performed only after shaping. A dehumidifying desiccant dryer set at 80 °C for 4 h to 6 h is typical for PA12. At ambient relative humidity above 60 %, moisture regain can occur within 30 min of open hopper storage; sealed feed systems or hopper dryers are therefore used in high-humidity production environments.
Although PA12 has lower equilibrium moisture than PA6 and PA66, surface moisture before processing is sufficient to produce splay marks and microvoids in extruded sections. The 0.10 % limit is a melt-processability threshold, not a target for property optimization. At moisture above 0.10 %, steam generated at the melt front lowers local viscosity and creates porosity. At moisture above 0.20 %, molecular weight loss can occur during extended melt residence, although the effect is less severe than in hydrolytically sensitive PA66. Loss of impact after recycling is often correlated with cumulative time at 260 °C rather than with initial moisture alone.
On injection moulding lines with general-purpose polyamide screws having L/D ratios of 18:1 to 24:1 and compression ratios between 2.0:1 and 2.5:1, melt temperatures for PA12 H UV natural are usually maintained between 230 °C and 260 °C. Mould temperatures between 40 °C and 80 °C control crystallization rate and post-moulding shrinkage. Excessive residence time at maximum barrel temperature leads to yellowing of the natural compound and torque variations in the plastication phase. Batch-to-batch variation in melt flow, measured by ISO 1133-1 at 235 °C with 2.16 kg, can alter cushion control and holding-pressure transfer in thin-walled parts.
On production-scale twin-screw compounders with L/D 36:1 to 44:1, dispersive mixing of the stabilizer package is influenced by screw configuration and barrel temperature profile. Poor dispersion of the UV package in natural PA12 may not be visible immediately after compounding but can appear as localized photodegradation after accelerated weathering. Melt-flow rate, nitrogen content, and ash content are therefore more reliable process-control measures than visual colour inspection alone. The interaction between screw speed, throughput, and specific mechanical energy determines the final stabilizer distribution and the residual moisture level after pelletization.
Typical downstream uses include pneumatic tubing, cable protection conduits, electrical connector housings, clips for fuel and brake lines, and pump components exposed to oil and grease. In hydrocarbon contact, PA12 is commonly assessed by volume swell and tensile retention after immersion in test fluids according to ISO 1817. The grade is also used in transportation systems where PA6 and PA66 may be more susceptible to zinc chloride road-salt stress cracking. The unfilled natural form is not recommended for applications requiring high stiffness, low creep under structural load, or continuous service above 100 °C without explicit validation.
The following matrix identifies regulatory and test standards commonly applied to unfilled PA12 natural compounds during qualification. It is not a certificate of compliance for any specific production lot.
| Requirement | Standard or test method | Typical evaluative position |
|---|---|---|
| Restriction of hazardous substances | RoHS Directive 2011/65/EU, IEC 62321 screening | Unfilled natural PA12 compound has no intentionally added Pb, Cd, Hg, Cr(VI), PBB, or PBDE; lot-specific XRF or GC-MS verification is required. |
| REACH SVHC | EC 1907/2006 Article 33 | No SVHC intentionally incorporated; supplier declaration must be checked against the candidate list for the specific stabilizer package. |
| Food contact | FDA 21 CFR 177.1500 | PA12 resin may meet compositional requirements for repetitive-use food-contact articles; finished-article migration testing under EU 10/2011 is required. |
| Accelerated weathering | ISO 4892-2 Method A | Natural UV-stabilized grade shows lower surface appearance retention than carbon-black grades after 1000 h; application-specific validation is required. |
| Flammability | UL 94 | Unfilled polyamide may achieve HB at 1.6 mm thickness; actual classification requires testing on the final colour and wall thickness. |
When the grade is extruded as thin-walled pneumatic tubing at line speeds controlled by haul-off tension, the conditioned-state properties of ISO 291 are less relevant than the dry-state melt properties; however, post-extrusion conditioning at 23 °C and 50 % RH is frequently used before burst-pressure testing to prevent brittle failure caused by very low moisture content. Final part dimensions stabilize after moisture uptake because diameter and length increase slightly relative to the dry extruded state. Published data for specific tube dimensions and line equipment is limited; validation on the production extruder is required to correlate haul-off ratio, vacuum calibration, and final moisture content.
