| HS Code | 760510 |
| Density | 1.12 g/cm³ |
| Water Absorption 24h | 0.35% |
| Mold Shrinkage | 0.5% |
| Tensile Strength Yield | 68 MPa |
| Elongation At Break | 35% |
| Flexural Strength | 95 MPa |
| Flexural Modulus | 2350 MPa |
| Izod Impact Strength Notched 23 C | 90 J/m |
| Rockwell Hardness | R120 |
| Heat Deflection Temperature 1 82 Mpa | 115°C |
| Glass Transition Temperature | 150°C |
| Dielectric Strength | 30 kV/mm |
| Volume Resistivity | 1E15 ohm·cm |
As an accredited LG Chemical LUXY KS G55 Amorphous PA6 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg sealed, moisture-proof, polyethylene-lined bags with desiccant, ensuring dry amorphous PA6 pellets remain contamination-free. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized 25kg bags of LG Chemical LUXY KS G55 Amorphous PA6; secure properly, protect from moisture and direct heat. |
| Shipping | Ship LUXY KS G55 Amorphous PA6 as non-hazardous resin pellets in sealed, moisture-proof polyethylene-lined bags on pallets. Avoid direct moisture exposure to prevent hydrolysis; store below 40°C. Use covered containers or trucks. Handle with standard equipment, keeping materials dry, clean, and free from cross-contamination during transit and warehousing. |
| Storage | Store LUXY KS G55 Amorphous PA6 in its original sealed container in a cool, dry, well-ventilated area. Protect from direct sunlight, heat sources, and moisture, as PA6 absorbs water. Keep containers tightly closed when not in use. Under proper conditions, shelf life typically extends up to one year from receipt. |
| Shelf Life | Shelf life is typically 2 years when stored sealed, cool, and dry, avoiding moisture exposure. |
For transparent food-contact reservoirs and lids used in kitchen appliances, LG Chemical LUXY KS G55 amorphous PA6 is injection-moulded at 100 wt% neat resin, or with 0.5–2.0 wt% certified food-contact colour masterbatch. Food-contact compliance is referenced to FDA 21 CFR 177.1500 and EU Regulation 10/2011 as amended, with overall migration tested by EN 1186-1 in 10% ethanol and 3% acetic acid simulants for 10 days at 40 °C, and caprolactam specific migration controlled below 15 mg/kg food simulant under EN 13130-7. Production on 80–130 tonne hydraulic injection-moulding machines with 25:1 L/D general-purpose nylon screws uses melt temperatures of 240–260 °C, nozzle temperatures 250–265 °C, mould temperatures 60–80 °C, injection pressures 70–100 MPa, hold pressures 50–70 MPa, and backpressure 0.5–1.5 MPa to maintain a melt cushion of 2–4 mm. Melt volume-flow rate is checked after drying by ISO 1133-1:2022 under grade-specific temperature and load conditions; batch shifts outside the datasheet window require barrel temperature correction of ±5 °C. Pre-drying in desiccant dryers with -40 °C dew point at 80 °C for 4–8 h is mandatory to reduce pellet moisture below 0.10 wt%; residual moisture above 0.15 wt% produces splay and surface haze. Terminal finished products include transparent coffee machine reservoirs, water tank covers, blender jug lids, and dispenser caps for non-pressurized service below 80 °C. Prolonged water contact induces moisture absorption; dimensional stability is verified by ISO 62, and application above 80 °C in hot-filled or steam-sterilized conditions is not recommended because absorbed water lowers stiffness and increases part warpage.
Transparent non-implantable fluid-management components are produced from LUXY KS G55 amorphous PA6 at 100 wt% neat resin, with external silicone-free mould release limited to 0.1–0.3 wt% only when ejection forces on 80–120 tonne machines exceed 4,500 kg. Biological evaluation follows ISO 10993-1:2018 and ISO 10993-5:2009 for cytotoxicity; the base polymer is tested under USP <88> Class VI for short-term contacting devices. The moulding process is executed in ISO 13485:2016 controlled facilities with 150–180 tonne electric injection-moulding machines using 22:1 L/D screws and valve-gated hot runners to reduce shear heating. Melt temperature is held at 250–265 °C, mould temperature at 70–90 °C, and injection velocity is profiled to 30–60 mm/s to eliminate jetting and weld-line optical defects in parts with wall thickness 1.2–3.5 mm. Hot runner manifold temperatures are set 5–10 °C above nozzle temperature, and switchover position is maintained at 6–8 mm before cushion bottom to prevent overpacking of thin sealing ribs. Pre-drying at 80 °C for 6 h to below 0.08 wt% moisture is validated by ISO 15512 Karl Fischer method B after shipping. Sterilization-route validation covers ethylene oxide, electron beam, and gamma irradiation; gamma irradiation at 25 kGy induces measurable amber shift and is avoided for colour-critical transparent housings, while steam autoclave at 121 °C is generally not recommended because water uptake at that temperature causes dimensional drift of 0.2–0.5% and a reduction in modulus. Terminal finished products include transparent pump housings, IV line connectors, surgical instrument handles, and fluid filter bodies. Published data for this specific grade under repeated autoclave cycling is limited; device manufacturers must validate the actual part geometry according to ISO 11135 or ISO 11137 before release.
A coextruded barrier layer of LUXY KS G55 amorphous PA6, typically 6–12 wt% of total film mass with tie layers at 2–4 wt% on both sides, is processed in three- or five-layer blown-film lines with die gap 1.8–2.2 mm, die temperature 230–245 °C, blow-up ratio 2.0–2.5, and frost line height 450–700 mm above the die. Food-contact compliance is based on FDA 21 CFR 177.1500 and EU Regulation 10/2011, with migration testing executed on the finished laminate according to EN 1186 and EN 13130; caprolactam specific migration is maintained below 15 mg/kg. Because oxygen transmission in polyamide layers is humidity-dependent, barrier design is checked by ASTM D3985-17 at 23 °C and 0% RH, and re-checked at 50% RH and 75% RH; published data for this specific grade in asymmetric multilayer constructions is limited, so downstream converters should not rely on monolayer PA6 oxygen transmission values. The production process requires independent extruder temperature zones for the PA resin to avoid degradation at the interface, and the maximum PA melt temperature is kept below 255 °C to prevent gel formation and die-lip build-up. Gravimetric feeders control layer distribution within ±5%, and internal bubble cooling maintains gauge variation below ±5% at the collapsing frame. Terminal film products include vacuum pouches, modified-atmosphere packaging lidding, barrier bag-in-box liners, and printed laminate stand-up pouches for oxygen-sensitive dry and paste goods. Use with high-acid hot-fill contents is limited to filling temperatures of ≤70 °C unless supported by full laminate migration and barrier retention data.
For pneumatic filter bowls and hydraulic sight tubes, LUXY KS G55 amorphous PA6 is injection-moulded at 100 wt% neat resin, with optional UV stabilizer masterbatch at 0.5–1.0 wt% for outdoor pneumatic service. The resin is used where polycarbonate fails by environmental stress cracking against synthetic ester hydraulic oils and where standard crystalline PA6 does not provide sufficient visual clarity for flow confirmation. Structural calculations use tensile properties from ISO 527-1:2019 and flexural modulus from ISO 178:2019; impact resistance is verified by ISO 179-1 Charpy notched at -30 °C, 23 °C, and 80 °C. Chemical resistance is screened per ISO 175:2010 and ASTM D543-21 with test liquids at 60 °C for 168 h. Test specimens are moulded according to ISO 294-1 from dried pellets and conditioned to 23 °C and 50% RH before destructive testing. Injection-moulding is performed on 120–180 tonne machines with 20:1–24:1 L/D screws, melt temperatures 250–270 °C, mould temperatures 80–100 °C, and holding pressure 60–80 MPa applied for 1.5–2.5 s gate freeze on parts with wall thickness 4–10 mm. Oil-heated moulds with spiral baffles maintain core temperature uniformity of ±5 °C, and total barrel residence time is kept below 20 min to avoid yellowing. Annealing at 80–100 °C for 2–4 h after demoulding reduces moulded-in stress and lowers the risk of stress cracking in alcohol-containing lubricator systems. Terminal finished products include pneumatic filter bowls, lubricator drip windows, hydraulic oil sight tubes, coolant expansion tank windows, and chemical dosing gauge housings. The operational boundary is defined by chemical exposure: continuous contact with concentrated nitric acid, phenol, cresol, calcium chloride or zinc chloride solutions is incompatible and causes surface etching or stress cracking; continuous pressure above 0.3 MPa in transparent wall sections is not recommended without pressure vessel validation to PED 2014/68/EU category III or equivalent local code.
When thick-walled cosmetic closures replace polycarbonate because fragrance alcohol and ester-based formulations cause crazing, LUXY KS G55 amorphous PA6 is substituted at 100 wt% with 0.2–1.5 wt% alcohol-resistant colour masterbatch and, where automated unscrewing tooling demands, 0.05–0.20 wt% external release. Compliance is limited to REACH Regulation (EC) No 1907/2006, EU Packaging and Packaging Waste Directive 94/62/EC heavy metals limits at 100 ppm, and ASTM D256-23 impact testing for drop resistance at 23 °C and 0 °C; when the closure contacts fragrance or lotion only during storage, migration is evaluated by the packaging supplier under EU Regulation 1223/2009 Annex I stability requirements. Alcohol resistance is screened by ISO 175:2010 immersion in 70% ethanol at 23 °C for 168 h. Injection moulding on 60–100 tonne machines uses melt temperature 235–250 °C, mould temperature 60–70 °C, and profiled injection speed 20–40 mm/s to avoid gas traps on collar ribs and knurls. Gate location is placed near the thickest section, typically 3–8 mm wall, and packing pressure 40–60 MPa is maintained for 3–6 s before cooling time 20–40 s. Terminal finished products include fragrance collars, serum bottle overcaps, lipstick sleeves, and lotion pump shrouds with post-mould metallization or pad printing; snap-fit interference is calculated after conditioning at 23 °C and 50% RH. The operating boundary includes avoiding prolonged immersion in high-water lotions above 50 °C because moisture absorption causes dimensional growth and reduces snap-fit interference.
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LG Chemical LUXY KS G55 is classified as an amorphous polyamide 6 (PA6) injection-moulding grade in which copolymerised units suppress crystallisation sufficiently to yield a transparent, isotropic solid. The suppressed crystallisation eliminates spherulitic light scattering and reduces the anisotropic shrinkage that dominates semi-crystalline PA6 processing. The material is therefore positioned between semi-crystalline polyamide and transparent polycarbonate in engineering applications requiring chemical contact with fuels and oils combined with dimensional stability in thin-wall parts. Typical unfilled density is 1.12–1.15 g/cm³ when determined according to ISO 1183-1. Melt volume-flow rate at 275 °C and a 5.00 kg load is 15–25 cm³/10 min by ISO 1133-1:2022. The glass transition temperature, measured by differential scanning calorimetry to ISO 11357-2, falls within 110–135 °C for the amorphous PA6 copolymer class. These values are class-typical ranges for transparent polyamide 6 copolymers; lot-specific certificate data from the supplier remain the controlling specification.
Hygroscopic equilibrium moisture in PA6 at 50% RH is approximately 2.5–3.0% w/w by ISO 62. For injection moulding of LUXY KS G55, the residual moisture target at the hopper outlet is ≤0.10% w/w; analytical verification may use ISO 15512 Karl Fischer titration. A closed-loop desiccant dryer with air dew point ≤ -40 °C and air flow not less than 3.7 m³/h per kg/h throughput is required. Drying at 80 °C for 4–6 h is the default condition. Moisture above 0.15% w/w causes hydrolytic chain scission at melt temperature, producing surface splay, loss of impact strength, and melt pressure fluctuation in the barrel. Overdrying at temperatures above 100 °C is not recommended because oxidative yellowing of the amorphous PA6 matrix may occur. The processing window is therefore narrow: the dryer must maintain low dew point while avoiding thermal oxidation; this is the primary process conflict for transparent PA6 on production-scale injection-moulding machines. Single-screw injection units with L/D 20–22 and a general-purpose three-zone screw are suitable for unfilled LUXY KS G55, provided the total melt residence time at 250–280 °C is kept below 10 min and the shooting chamber is not oversized relative to shot weight by more than 2.5:1.
Barrel temperature settings follow the flat profile typical of amorphous PA6 copolymers. Feed-zone set points at 240–250 °C, compression at 260–275 °C, metering at 270–280 °C, and nozzle at 260–270 °C maintain melt viscosity without excessive shear heating. Injection velocity should be moderate to fast for parts below 1.5 mm wall thickness; for parts above 4.0 mm, a lower velocity with longer hold time is preferred. Back pressure of 5–10 bar hydraulic is sufficient for homogeneous melt; higher back pressure increases shear heating and may reduce melt viscosity in the barrel. Holding pressure should transition from 60–80% of the peak injection pressure and decay over 4–8 s, with gate seal verified by part-weight stability. Clamp force must be calculated from projected area and cavity pressure rather than from generic tonnage factors. In transparent unfilled PA6 parts, a visible flow mark often indicates that the melt front has cooled below the glass transition temperature before packing, not necessarily that the clamping force is insufficient.
With a glass transition temperature of 110–135 °C, a mould temperature of 60–90 °C places the solidifying layer well below Tg. This condition favours rapid skin formation and short cycle time in thin-wall parts, but it also freezes in flow-induced molecular orientation. The result is an increase in through-thickness residual stress and a risk of stress whitening or delayed shape change after annealing. For parts with wall thickness above 4 mm, a mould temperature at the upper end of 80–90 °C is preferred to permit relaxation before solidification. Cooling time can be estimated by the one-dimensional transient conduction relation tc ≈ (h²/π²α) ln[(8/π²)((Tmelt − Tmold)/(Teject − Tmold))], with thermal diffusivity α approximately 0.11 mm²/s for amorphous PA6. The equation shows that wall thickness, not injection unit size, dominates cycle-time scaling for unfilled transparent polyamide parts. If ejection occurs above 80 °C without uniform cooling, flat parts may distort by 0.3–0.6 mm over a 200 mm span; therefore core and cavity temperature control should be held within ±5 °C across the mould face.
Hot-runner manifolds for LUXY KS G55 should be set within 250–270 °C, and the material should not remain in the manifold during production interruptions longer than 5 min. Needle-valve gates provide clean separation but can leave flow lines when injection velocity is below 150 mm/s for a 2 mm wall. Direct sprue gates often generate visible flow marks on transparent parts; therefore pin-point or tunnel gates are used. Gate cross-section should be 0.8–1.2 mm for parts below 1.5 mm wall and 1.2–2.0 mm for thicker sections. Venting depth for unfilled PA6 is 0.01–0.02 mm, with land length 1.0–1.5 mm to avoid flash while releasing trapped air from the melt front.
The following table compares class-level ranges for LUXY KS G55 amorphous PA6 with a standard unfilled semi-crystalline PA6 and a transparent polycarbonate. Comparisons are anchored to the test standards listed; values are not lot-specific.
| Property | LUXY KS G55 amorphous PA6 | Semi-crystalline PA6 | Polycarbonate |
|---|---|---|---|
| Optical haze at 2.0 mm | 2–5% (ISO 14782) | opaque | 0.5–1.5% (ISO 14782) |
| Density | 1.12–1.15 g/cm³ (ISO 1183-1) | 1.13–1.15 g/cm³ (ISO 1183-1) | 1.19–1.21 g/cm³ (ISO 1183-1) |
| Linear mould shrinkage, parallel | 0.6–0.9% (ISO 294-4) | 1.0–1.4% (ISO 294-4) | 0.5–0.7% (ISO 294-4) |
| Water absorption at 50% RH | 2.5–3.0% (ISO 62) | 2.5–3.0% (ISO 62) | 0.15–0.20% (ISO 62) |
| Tensile modulus | 2900–3300 MPa (ISO 527-1/-2) | 2800–3200 MPa (ISO 527-1/-2) | 2300–2400 MPa (ISO 527-1/-2) |
| Charpy notched impact, 23 °C | 8–12 kJ/m² (ISO 179-1/1eA) | 5–8 kJ/m² (ISO 179-1/1eA) | 60–80 kJ/m² (ISO 179-1/1eA) |
| Heat deflection temperature, 1.8 MPa | 95–115 °C (ISO 75-2) | 60–70 °C (ISO 75-2) | 120–130 °C (ISO 75-2) |
Chemical resistance of amorphous PA6 copolymers follows the general polyamide profile: aliphatic hydrocarbons, diesel fuel, engine oil, and many polar aprotic solvents produce little loss in tensile properties. Strong acids, concentrated formic acid, phenols, chlorinated solvents, and oxidising agents attack the amide linkage and should be excluded. Continuous exposure to hot water above 80 °C causes hydrolysis; the rate accelerates with temperature, and components under tensile load may exhibit stress corrosion cracking before bulk degradation is visible. Environmental stress cracking of polycarbonate in ketones, esters, and aromatic solvents is not the governing concern for LUXY KS G55, but solvent uptake in aggressive media can still reduce glass transition temperature by plasticisation. Designers should therefore specify drained or intermittent contact for fluid-handling parts and validate the specific lubricating oil or cleaning agent by immersion testing under ISO 22088-2 constant-strain conditions.
Pre-drying is set at 80 °C for 4–6 h; residual moisture is held at ≤0.10% via ISO 15512. Melt temperature is 250–280 °C; mould temperature is 60–90 °C. Back pressure is 5–10 bar; screw rotational speed is 60–120 rpm for 25–40 mm screw diameters. Injection pressure is 600–1200 bar hydraulic depending on flow length; hold pressure is 400–800 bar. These ranges apply to unfilled transparent PA6 on conventional hydraulic toggle injection-moulding machines. The absence of glass fibre eliminates abrasive screw wear, so general-purpose nitrided screws are acceptable. However, the amorphous structure does not tolerate prolonged hold times at high melt temperature; the melt should not be held at 270 °C for more than 10 min without screw retraction and temperature setback.
Production parts that use amorphous PA6 in factory environments include transparent fuel filter bowls, oil-level sight glasses, electrical terminal covers, medical device housings, and automotive interior switches requiring dimensional stability after exposure to oils. For food-contact or medical-grade applications, the specific LUXY KS G55 lot must be checked against applicable regional lists; published regulatory data for this configuration may be limited. UL 94 flammability is typically HB at 1.5 mm for unfilled PA6, but the grade-specific UL yellow card should confirm classification. Applications requiring continuous load above 90 °C in moist environments are outside the material’s operational boundary because hydrolytic molecular weight loss and plasticisation combine to reduce creep resistance.
