| HS Code | 944749 |
| Material | Nylon 12 (Polyamide 12) |
| Staple Length | 43 mm |
| Density | 1.01 g/cm³ |
| Melting Point | 178 °C |
| Moisture Regain | 0.8% |
| Water Absorption At Saturation | 1.5% |
| Tenacity | Approx. 50 cN/tex |
| Elongation At Break | Approx. 30% |
| Initial Modulus | Approx. 250 cN/tex |
| Abrasion Resistance | Excellent |
| Chemical Resistance | Excellent to oils, fuels, and many solvents |
| Uv Resistance | Good |
As an accredited EMS-Griltech Grilamid HP 1200 Nylon 12 Fiber (Staple Length = 43) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Grilamid HP 1200 Nylon 12 Fiber (staple length 43) is supplied in 25 kg net bags, palletized and shrink-wrapped for protected storage. |
| Container Loading (20′ FCL) | One 20′ FCL contains EMS-Griltech Grilamid HP 1200 Nylon 12 Fiber, staple length 43, secured, protected, and ready for transport. |
| Shipping | Grilamid HP 1200 is a non-hazardous nylon 12 staple fiber, length 43 mm. Ship in sealed, dry containers to prevent moisture absorption and contamination. Avoid excessive compression, sharp objects, and high heat. Standard dry freight is acceptable; no special hazmat declaration required. Ensure secure labeling and clean conditions during transit. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep in original sealed packaging to prevent contamination and static buildup. Avoid contact with strong oxidizers. Protect from prolonged UV exposure. Maintain stable temperatures; under proper conditions, this nylon 12 fiber retains quality for several years. |
| Shelf Life | Store in cool, dry conditions away from UV light. Shelf life typically 2–3 years from manufacture date when unopened. |
EMS-Griltech Grilamid HP 1200 Nylon 12 staple fibre cut to 43 mm is introduced into wet-press paper machine clothing in the top and core batt layers rather than as a 100% structural fibre. The technical basis is the lower equilibrium moisture regain of PA12—approximately 0.7% at 23 °C/50% RH compared with 2.8–3.0% for PA6—which reduces hydrolysis-induced tensile loss when the felt is exposed continuously to 60–90 °C and pH 4–6 in the press nip. Compliance evaluation draws on ISO 9073-3 tensile, ISO 9073-2 thickness, EN ISO 12947-2 abrasion resistance, and ISO 13934-1 fabric tensile. If the clothing runs on food-grade paper machines, EU Regulation 1935/2004 and FDA 21 CFR 176.170 indirect food contact conditions apply. Formulation is typically 10–25 wt% PA12 staple in the batt blend, with the balance PA6 or PA66; exceeding 30 wt% is avoided because the lower crimp retention of PA12 and higher bending stiffness reduce card web cohesion and cause lapping folds on cross-lappers. Production starts with bale opening at 65–70% RH, two-pass fine opening, carding on a 1.0–1.5 m wide card with worker-stripper settings configured for 43 mm staple, cross-lapping to 400–800 g/m², pre-needling at 180–250 punches/cm², finish needling at 300–450 punches/cm², and heat-setting at 150–170 °C for 2–4 min under controlled width tension. Terminal finished product types include wet press felts for packaging and board machines, transfer fabrics, and shoe press base cloths, with basis weights from 1,200–2,500 g/m² depending on machine width and speed.
Air filtration for low-temperature acidic gas streams in fertiliser production and chemical intermediates uses 43 mm PA12 staple as a flexibilising component in needled felts because its hydrolysis resistance is higher than PA6 under acidic condensation. The compliance framework includes ISO 16890-1:2016 for particulate classification, ISO 11057:2011 for cleanable filter media performance, ISO 13934-1 for tensile, and REACH Annex XVII where applicable. The addition ratio is 15–35 wt% PA12 staple in a blend with polyphenylene sulphide or meta-aramid; above 35 wt%, the continuous dry-service temperature must be derated because PA12 has a melt temperature of 176–180 °C and a practical continuous limit near 90–100 °C for dimensionally stable needled media, with short excursions to 130 °C permitted only when tensile load remains below 20% of breaking strength. The production process comprises opening at 60–65% RH, carding to a 20–30 g/m² web, cross-lapping to 450–800 g/m², pre-needling at 200–300 punches/cm², finish needling at 350–500 punches/cm², singeing at 3–6 m/min, calendering at 120–140 °C and 80–120 N/mm linear pressure, and optional PTFE membrane lamination using a hot-melt adhesive below 150 °C. Terminal finished product types include pulse-jet filter bags for chemical dryers, dust collector elements for fertiliser prilling towers, and pleated panel filters for low-temperature acid gas particulate, with total fabric mass typically 550–650 g/m² in cleanable baghouse service. Published data for this exact HP 1200 needlefelt configuration under acidic gas temperature cycling is limited; the stated boundaries derive from PA12 thermal properties and needlefelt dimensional stability test results.
Depth filtration media for wine clarification, edible oil polishing, and process water treatment can be constructed from 43 mm PA12 staple because PA12 has low extractables and falls under food-contact material provisions of FDA 21 CFR 177.1500 and EU Regulation 10/2011, with overall migration verified by EN 1186 and specific migration of laurolactam assessed where required. The addition ratio in wet-laid or dry-laid depth sheets is typically 10–25 wt% PA12 staple in a cellulosic or polyester fibre matrix; loadings up to 50 wt% are used for high wet-strength depth sheets, while loadings below 10 wt% do not appreciably change wet burst strength. The downstream process includes fibre opening, blending at 45–55% RH, carding or wet-laying, hydroentangling at 180–260 bar in a double-sided unit, drying at 110–130 °C, pleating at 10–25 pleats per 100 mm, and edge sealing with hot-melt polyamide. Because PA12 has lower hydrogen-bonding capacity than cellulosic fibre, 5–10 wt% viscose or fibrillated cellulose is normally retained in the furnish to prevent sheet formation defects and to maintain wet-web cohesion before hydroentangling. Terminal finished product types include lenticular filter modules, depth filter sheets for plate-and-frame presses, pleated cartridge media for wine and beer clarification, and high wet-strength support scrims used in process water bag filters.
In compression-moulded PA12 organosheets, the use of 43 mm staple fibre as a matrix-rich veil is governed by the need to distribute molten PA12 into glass or carbon woven layers without producing dry spots. The applicable mechanical test matrix includes ISO 527-4 for tensile, ISO 14125 for flexural, ISO 179-1 for Charpy impact, and ISO 1183-1 for density; REACH Annex XVII and, where relevant, FMVSS 302 govern chemical and flammability limits. The addition ratio is 30–50 wt% PA12 staple in commingled mats or 15–30 g/m² veil layers placed between structural plies; the 43 mm cut length is selected because it is short enough to be carded uniformly at low per-layer mass, yet long enough to retain web integrity during automated pick-and-place stacking. The production sequence includes carding into veils, desiccant drying to below 0.1% residual moisture before consolidation, stacking between glass twill or carbon non-crimp fabrics, and compression moulding at 200–220 °C for 10–20 min under 10–25 bar hydraulic pressure, followed by cooling to below 120 °C before demoulding. Published data for this specific 43 mm HP 1200 veil configuration in organosheets is limited; the process window is derived from comparable PA12 staple fibre mats and should be verified by plaque trials. Terminal finished product types include recyclable PA12 organosheets, overmoulded stiffening ribs for sports equipment, and automotive structural brackets where the matrix-rich veil reduces surface void content.
Abrasive nonwoven converting lines running 43 mm PA12 staple in surface conditioning products observe a defined upper cure temperature because the melting point of PA12 is 176–180 °C and prolonged residence above 165 °C induces axial shrinkage, crimp redistribution, and loss of cut-length uniformity. The applicable compliance framework includes RoHS 2011/65/EU, REACH Annex XVII, and EN ISO 12947-2 for abrasion resistance of the substrate after curing, supplemented by ISO 13935-2 tensile after resin cure. The blend ratio is 20–35 wt% PA12 staple with PA6 or PA66, with fibre linear densities from 15–40 dtex depending on surface finish grade; below 20 wt%, the lower moisture regain of PA12 has a negligible effect on resin pickup variance, while above 35 wt% carding openers must be slowed to avoid fibre breakage. Production involves bale opening at 50–60% RH, carding to 100–300 g/m², needle punching at 200–400 punches/cm², spray application of 15–25 wt% phenolic or melamine resin, and curing at 140–160 °C for 3–5 min; the 43 mm staple is selected for the high web compactness required for surface conditioning discs, not for ropes or brushes. Terminal finished product types include surface conditioning discs, deburring belts, hand pads, and nonwoven wheel brushes for metal finishing and paint preparation.
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The product EMS-Griltech Grilamid HP 1200 Nylon 12 Fiber (Staple Length = 43 mm) is a polyamide 12 staple fiber based on an EMS-Griltech Grilamid HP 1200 resin designation and supplied at a cut length of 43 mm. The polymer is identified as PA12 under ISO 1043-1:2011. Its molecular backbone carries eleven methylene units between amide groups, producing a lower amide concentration than polyamide 6 or polyamide 6,6. This structure reduces equilibrium moisture uptake, lowers density to approximately 1.01–1.02 g/cm³ under ISO 1183-1, and typically gives unfilled molded PA12 an elongation at break of 200–400% when tested under ISO 527-1/-2. The 43 mm staple length places the material in the semi-worsted and worsted carding range, distinct from short-cut fiber at 6 mm or 12 mm used in wet-laid veils and from continuous multifilament yarn used in commingled textile preforms. These geometric differences control web cohesion, needling response, and fiber orientation in dry-lay nonwoven and thermoplastic composite intermediate production.
The 43 mm cut can be processed on a semi-worsted card with cylinder speed between 300 m/min and 600 m/min, worker/stripper gaps of 0.25 mm to 0.40 mm, and doffer web basis weight from 15 g/m² to 80 g/m². At ambient relative humidity below 40%, static charge on polyamide 12 fiber can disrupt web transfer and increase fly. In needlepunch consolidation, barb depth and needling density must be controlled because staple lengths above 60 mm can wrap around feed rolls, while lengths below 30 mm reduce web tensile strength. Fiber wrap on high-speed card rollers is a known production failure mode when spin finish is unevenly applied. The spin finish influences carding friction and subsequent resin wetting; excessive finish can produce smoke or porosity during melt lamination, while insufficient finish can produce nep formation and uncontrolled fiber breakage. Batch-to-batch variation in crimp frequency and finish level is typically controlled to producer-defined lot limits. Independent field data for this exact EMS-Griltech fiber configuration is not broadly published, so carding trials should use producer-certified fiber length distribution and finish content.
In nonwoven air-lay, the 43 mm staple can be blended with bicomponent binder fiber at 190–200°C to form low-density mats. Compared with 6 mm short-cut PA12 fiber, the 43 mm staple yields higher web tear resistance in needlepunch and air-lay, but cannot be uniformly dispersed in wet-lay systems designed for fiber lengths below 10 mm. Compared with continuous PA12 filament, the staple form allows blending with natural or other synthetic staple fibers to modify tribology, acoustic absorption, or cost. The staple must be opened before carding; high opener intensity can break the fiber and shift length distribution downward, reducing web tensile strength. Production-scale opening lines with pinned beaters should be set to low speed until fiber damage is assessed by length distribution measurement under a fiber diagram apparatus.
The melting point of PA12 is generally 170–180°C by ISO 11357-3, lower than PA6 at 220–225°C and PA66 at 255–265°C. The heat deflection temperature of unfilled PA12 under load is lower than PA66, and creep resistance above 70°C is limited. Continuous melt processing must not exceed approximately 280°C because thermo-oxidative chain scission accelerates. In high-temperature composites where service temperature exceeds 120°C under load, polyphenylene sulfide or aromatic polyamide fiber may be required. The lower melt temperature is an advantage in thermoplastic consolidation because hot-press temperatures of 190–220°C can form PA12 matrix-rich sheets without overcure or oxidation. However, if the material is exposed to long residence times above 240°C in a twin-screw extruder, viscosity loss and yellowing can be observed on production lines. The processing window is broader than PA6, but the continuous-use temperature is lower than PA66 and far below high-temperature thermoplastics.
For melt consolidation or compounding, the fiber should be dried at 80°C for 4–12 h in a desiccant dryer with dew point below -30°C to reduce moisture below 0.1 wt%. Residual moisture above 0.15 wt% reacts hydrolytically at barrel temperatures of 210–240°C, causing pressure fluctuation, splay, and molecular weight reduction. A co-rotating twin-screw extruder with L/D ratio 40–48 and vacuum degassing at -0.08 MPa gauge is typical for compounding PA12 staple into filled or unfilled compounds. Melt volume flow rate can be checked under ISO 1133-1:2022 at 235°C with a 2.16 kg load. Values below or above the producer specification indicate either excessive moisture or thermal degradation. In hot-press consolidation of needlepunched PA12 webs, applied pressure is typically 0.5–2.5 MPa with heating to 190–220°C; insufficient pressure yields voids at fiber crossover points, while excessive pressure causes lateral flow of matrix. Release film rated to 230°C is required because molten PA12 adheres to uncoated steel tooling.
Polyamide 12 has the lowest water absorption of the common aliphatic nylons. At 24 h immersion at 23°C under ISO 62, PA12 resin typically absorbs 0.2–0.3% moisture, compared with 1.6–1.9% for PA6 and 1.0–1.3% for PA66. At saturation, PA12 absorbs on the order of 1.5–2.0%, whereas PA6 can exceed 9%. This difference stabilizes dimensions and mechanical properties in humid service. The lower density of PA12 reduces specific weight in fiber-reinforced nonwovens. In molded or consolidated forms, PA12 also has lower flexural modulus than PA6 and PA66, which improves flexibility and impact toughness but limits stiffness-driven applications.
| Property | PA12 | PA6 | PA66 | Test designation |
|---|---|---|---|---|
| Density | 1.01–1.02 g/cm³ | 1.13–1.14 g/cm³ | 1.13–1.15 g/cm³ | ISO 1183-1 |
| Melting point | 170–180°C | 220–225°C | 255–265°C | ISO 11357-3 |
| Water absorption, 24 h at 23°C | 0.2–0.3% | 1.6–1.9% | 1.0–1.3% | ISO 62 |
| Tensile modulus, unfilled resin | 1200–1600 MPa | 2600–3400 MPa | 2700–3300 MPa | ISO 527-1/-2 |
| Elongation at break, unfilled resin | 200–400% | 50–150% | 30–100% | ISO 527-1/-2 |
In carded needlepunch web production for thermoplastic composite preforms, the fiber length distribution around 43 mm supports web tensile strength before consolidation, allowing automated layup and cutting without excessive stretching. The web is then hot-pressed or belt-laminated between 190°C and 220°C to form a PA12 matrix sheet. In liquid filtration, the low moisture absorption of PA12 maintains fiber diameter and pore-size stability better than PA6 in humid hydrocarbon-laden streams. For acoustic absorbers in underhood or wet environments, PA12 may be selected instead of PA6 when dimensional stability after condensation exposure is valued. The product is not typically used where continuous service exceeds 100–120°C under mechanical load because creep and oxidative stability are lower than PA66 or polyphenylene sulfide. Each application requires verification of fiber surface finish compatibility with downstream adhesive, size, or matrix chemistry.
The chemical resistance profile of PA12 is characterized by resistance to aliphatic hydrocarbons, salt solutions, and dilute alkali; it is not suitable for prolonged exposure to strong acids, strong oxidizing agents, or polar solvents at elevated temperature. Fiber surface finish chemistry must be specified for the intended matrix. Finishes optimized for thermoplastic lamination may leave ash or organic residue in epoxy-amine or phenolic systems, which can reduce interlaminar shear strength. The producer datasheet for the 43 mm staple configuration should be consulted for yarn tenacity, crimp frequency, spin finish content, and lot-to-lot tolerance. Published independent data for this exact configuration is limited; qualification trials should therefore use producer-certified values and process-specific testing under ISO 1133-1:2022, ISO 527-1/-2, and ASTM D638-14 where applicable.
