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| HS Code | 756207 |
| Density | 0.9-1.6 g/cm³ |
| Tensile Strength | 20-100 MPa |
| Impact Resistance | 2-80 kJ/m² |
| Heat Deflection Temperature | 60-260 °C |
| Melt Flow Index | 1-60 g/10 min |
| Flame Retardancy | UL94 V-0 to HB |
| Chemical Resistance | resistant to acids, alkalis, solvents |
| Uv Stability | enhanced with stabilizers; resists degradation |
| Electrical Insulation | high dielectric strength |
| Water Absorption | 0.01-1.5% over 24 hours |
As an accredited Modified Plastics factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Modified plastics are packaged in 25 kg moisture-proof woven bags with inner polyethylene lining, stacked on pallets. |
| Container Loading (20′ FCL) | Loading 20′ FCL of modified plastics: secure palletized bags, protect from moisture, label clearly, and ensure safe, stable weight distribution. |
| Shipping | Modified plastics are shipped as non-hazardous solid pellets, granules, or powders in sealed bags, drums, or FIBCs. Keep dry, avoid excessive heat and direct sunlight. Protect packaging from damage and contamination. Standard freight is suitable, with no special hazard labeling required unless additives alter classification. |
| Storage | Store modified plastics in a cool, dry, well-ventilated area away from direct sunlight, ignition sources, and strong oxidizers. Keep containers tightly sealed and clearly labeled to prevent contamination or moisture uptake. Avoid excessive heat or UV exposure, which can degrade material properties. Segregate different formulations to maintain batch integrity and comply with relevant safety data sheet guidelines. |
| Shelf Life | Shelf life varies by formulation; store in cool, dry conditions away from sunlight. Typically stable for 1–2 years if sealed. |
During injection molding of a 30 wt% short-glass-fiber-reinforced PA6/PA66 compound with a copper halide heat-stabilizer package, the feed system delivers a melt cushion of 4 mm to 6 mm to prevent fiber attrition at the screw tip. Pre-drying at 80 °C for 4 h with a dew point below -40 °C reduces residual moisture below 0.10 wt% and avoids hydrolytic chain scission during plastication. Melt temperature is maintained between 280 °C and 300 °C, while the tool surface is held at 100 °C to accelerate through-thickness crystallization. Cavity fill pressure ranges from 60 MPa to 90 MPa on a 7500 kN hydraulic injection molding machine. Melt volume flow rate under ISO 1133-1 at 275 °C/5 kg is typically 12 g/10 min to 18 g/10 min. Published datasheets for this compound class report tensile strength near 185 MPa under ISO 527-2 and heat deflection temperature of 245 °C at 1.8 MPa under ISO 75-2. Finished components include air intake manifolds, charge air ducts, resonator bodies, and engine-mounted cable trays. Glycol resistance under load at 135 °C remains a known constraint, and design strain in coolant-contact weld areas must not exceed 0.8%. Volatile condensable emissions are screened in accordance with VDA 278, and the grade is not specified for continuous exposure above 180 °C because oxidative attack at the glass-matrix interface degrades weld-line strength.
Because halogen-free connector platforms impose a measurable penalty on tracking resistance, a PA66 matrix modified with 25 wt% short glass fiber and 12 wt% aluminium diethylphosphinate flame retardant retains UL 94 V-0 at 0.8 mm while the comparative tracking index under IEC 60112 drops from approximately 600 V in an unfilled halogen-free PA66 to 500 V or below at phosphorus loadings above 14 wt%. Injection molding requires drying at 80 °C for 4 h to reach residual moisture below 0.10 wt%. Barrel temperatures are set between 280 °C and 300 °C, and the tool is held at 90 °C to 110 °C to minimize post-mold warpage in multi-cavity connector housings. Screw rotation speed is limited to 80 rpm to prevent shear heating that liberates phosphine decomposition residues and creates gate blush. The following table lists representative values recorded on a 1200 kN electric injection molding machine across three glass fiber loadings.
| Property | 15 wt% GF | 25 wt% GF | 35 wt% GF | Test method |
|---|---|---|---|---|
| Tensile strength | 110 MPa | 140 MPa | 170 MPa | ISO 527-2 |
| Notched Charpy impact | 5 kJ/m² | 6 kJ/m² | 7 kJ/m² | ISO 179-1/1eA |
| HDT at 1.8 MPa | 220 °C | 232 °C | 238 °C | ISO 75-2 |
| Comparative tracking index | 525 V | 500 V | 460 V | IEC 60112 |
| UL 94 rating at 0.8 mm | V-0 | V-0 | V-0 | UL 94 |
Finished components include high-voltage battery management connectors, relay housings, and terminal blocks. Specifications for inverter connectors frequently demand a minimum CTI of 600 V, which forces selection of a reduced phosphorus system or a PBT/ASA blend when severe tracking resistance takes priority. The halogen-free route also narrows the processing window: residence time above 310 °C must not exceed 5 min because the phosphorus synergist separates from the matrix and creates surface bloom at the gate. Dimensional capability for a 20 mm × 35 mm connector housing is controlled within ±0.08 mm on critical terminal pitch dimensions when tool temperature is staged between 90 °C and 110 °C.
On a 60 mm single-screw extrusion line with a 24:1 L/D screw, halogen-free flame-retardant polyolefin jacketing compounds are processed with a barrel profile from 145 °C at the feed zone to 185 °C at the die. The formulation is based on an EVA/LDPE carrier modified with 55 wt% to 65 wt% magnesium hydroxide or aluminium trihydrate. The metal hydrate filler releases water vapor above 190 °C, so screw speed is limited to 45 rpm and the die gap is set at 2.5 mm to control melt pressure below 18 MPa. A vacuum vent at 0.08 MPa removes residual moisture from the filler before the metering zone. Finished products include building wire jackets, control cable sheathing, and conduit liners for indoor installations. Flame spread is assessed under IEC 60332-1-2, while halogen acid gas release is measured under IEC 60754-2, where the pH of washing water must not fall below 4.3 and conductivity must not exceed 10 μS/mm. Smoke density is evaluated under IEC 61034-2. Tensile strength before aging is tested under IEC 60811-501, and the typical value lies between 10 MPa and 13 MPa. The operational boundary is set by moisture adsorption: Mg(OH)₂-filled material stored in ambient air above 60% RH for more than 24 h produces surface porosity at the cone wall because the filler desorbs water at the die exit.
Outdoor junction box housings demand a combination of UL 94 V-0 at 1.5 mm, CTI above 400 V, and sufficient impact strength after 1000 h of Xenon arc exposure under ISO 4892-2. A polyphenylene ether/polystyrene blend modified with 20 wt% glass fiber and a phosphate ester flame retardant is injection molded at a melt temperature of 310 °C and a tool temperature of 120 °C. The material is dried at 105 °C for 4 h to reach moisture below 0.05 wt%. The low mold shrinkage of 0.2% to 0.4% stabilizes the injection-molded junction box footprint for sealing pad compression. Compliance is tested under IEC 60670 for enclosures, IEC 62852 for PV connectors, and UL 1703 for flat-plate photovoltaic modules. The comparative tracking index must exceed 400 V under IEC 60112. Finished components include rooftop junction box housings, DC connector bodies, and optimizer enclosures. The grade is not specified for wall sections below 1.0 mm because notch sensitivity increases sharply at the gate freeze-off region. Hydrolytic aging in damp-heat tests at 85 °C and 85% RH for 1000 h reduces tensile strength by approximately 15%; therefore outdoor service in tropical microclimates requires an additional hydrolysis stabilizer package.
When repeated cleaning with quaternary ammonium and glutaraldehyde-based disinfectants causes stress cracking in PC/ABS weld lines, medical enclosure programs often shift to an impact-modified polyphenylene ether compound formulated with 15 wt% to 20 wt% styrenic block copolymer impact modifier and 10 wt% mineral filler. Drying is executed at 100 °C for 3 h in a desiccant dryer with a -40 °C dew point. Melt temperature is controlled at 300 °C to 325 °C, and the mold surface is set to 90 °C. The material is processed in an ISO 13485 clean room with closed-loop resin conveying to limit endotoxin load. Cytotoxicity is assessed under ISO 10993-5, and the compound is screened for USP Class VI compliance. Finished components include infusion pump housings, diagnostic reader enclosures, and fluid manifold covers. The operational boundary is autoclave exposure: repeated cycles at 121 °C for 15 min produce dimensional drift above 0.4% in unreinforced grades; therefore glass-reinforced PPE or steam-sterilizable polysulfone is specified when terminal sterilization exceeds 500 cycles. Lipophilic drug contact is excluded unless the grade has been subjected to ISO 10993-18 extractables and leachables evaluation. Screw retraction speed is kept below 50 mm/s to avoid fuming lubricants contaminating the molding cell air supply.
For unlubricated conveyor drive gears, a mineral-filled PA6 compound containing 30 wt% wollastonite or calcium carbonate and 4 wt% PTFE micropowder is molded with a melt temperature of 270 °C and a tool temperature of 120 °C. The filler package lowers the coefficient of linear thermal expansion to approximately 5.0×10⁻⁵ K⁻¹, while the PTFE phase reduces equilibrium wear against a steel worm at 0.25 m/s sliding speed. Injection screw back pressure is held at 6 MPa, and injection speed is set to 60 mm/s to prevent filler orientation at the tooth root. After ejection, the gear blanks are moisture conditioned at 70 °C and 62% RH until moisture uptake reaches 2.0 wt% to 2.5 wt%. Dimensional acceptance is measured under ISO 1183 density and ISO 3274 surface roughness. Torque-lifetime trials on a 500 N·m bench dynamometer show that tooth-flank temperature must remain below 90 °C; above this threshold the PA6 matrix softens and the mineral filler begins to gouge the worm surface. Finished products include conveyor idler gears, bushings, chain tensioners, and textile machine cams. The system is not specified for continuous dry-running contact that pushes tooth-flank temperature beyond 90 °C unless forced lubrication or a metal heat-sink gear body reduces the contact surface temperature.
In aluminium window profile production, thermal break strips are extruded from a 25 wt% glass-fiber-reinforced PA66 grade with hydrolysis resistance. Twin-screw compounding distributes glass fibers to a retained length of 0.25 mm to 0.35 mm before the melt enters a 60 mm profile die. Drying at 80 °C for 6 h reduces moisture to 0.15 wt% before extrusion. Barrel zones are profiled from 270 °C at the feed throat to 290 °C at the die. Calibration sleeves at 60 °C lock the profile within ±0.15 mm on wall thickness. Transverse thermal conductivity is approximately 0.30 W/(m·K) compared with 160 W/(m·K) for aluminium, which is the basis for thermal break service. Mechanical acceptance is measured under ISO 527-2 tensile modulus and ISO 75-2 heat deflection temperature. Finished components include insulating bar sections for aluminium window profiles, structural thermal breaks in curtain wall connectors, and separator strips in dual-component frame systems. If the granulate is exposed to ambient air above 60% RH for more than 20 min, surface moisture uptake raises melt viscosity and produces central seam porosity at the die exit. In addition, the profile must not be specified for structural adhesive bonding with amine-curing epoxies because amine reaction with residual PA66 surface moisture causes bond-line blistering.
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Modified Plastics is a pelletized compound series derived from polypropylene, acrylonitrile-butadiene-styrene, polyamide 66, and polyoxymethylene matrices. The line includes MP-GF30-PP, a glass-fiber reinforced polypropylene; MP-IM-PA66, a rubber-toughened polyamide 66; and MP-FR-ABS, a brominated flame-retardant ABS. These designations are internal grade references, not trademarked product names. The compounds are manufactured by continuous twin-screw compounding with controlled fiber content, impact-modifier loading, and flame-retardant package. Specifications are matrix-dependent and are certified on each lot through melt flow rate, filler content, tensile properties, and flammability classification.
| Property | Test method | MP-GF30-PP | MP-IM-PA66 | MP-FR-ABS |
|---|---|---|---|---|
| Density | ISO 1183-1 | 1.12 g/cm³ | 1.10 g/cm³ | 1.19 g/cm³ |
| Tensile modulus | ISO 527-2 | 5,800 MPa | 2,600 MPa | 2,400 MPa |
| Tensile stress at break | ISO 527-2 | 92 MPa | 58 MPa | 40 MPa |
| Notched Charpy impact, 23 °C | ISO 179-1/1eA | 7.5 kJ/m² | 10 kJ/m² | 11 kJ/m² |
| Heat deflection temperature, 0.45 MPa | ISO 75-2/B | 152 °C | 200 °C | 96 °C |
| Melt flow rate | ISO 1133-1:2022 | 3.6 g/10 min at 230 °C/2.16 kg | 10 g/10 min at 275 °C/2.16 kg | 22 g/10 min at 220 °C/10 kg |
| Vertical burn classification | UL 94 | HB at 1.5 mm | HB at 1.5 mm | V-0 at 1.5 mm |
When compared with unmodified polypropylene, MP-GF30-PP raises tensile modulus from approximately 1,600 MPa to 5,800 MPa under ISO 527-2 and heat deflection temperature from 105 °C to 152 °C under ISO 75-2/B. The increase is obtained through a maleic anhydride-grafted coupling agent. Without coupling, glass-filled polypropylene typically retains a notched Charpy value below 5 kJ/m² under ISO 179-1/1eA. The coupled grade is also differentiated from talc-filled polypropylene: at 20 wt% talc, tensile modulus is generally near 3,000 MPa, notched Charpy near 4 kJ/m², and heat deflection temperature near 125 °C under 0.45 MPa; the glass-fiber coupled grade exceeds these values but reduces elongation at break to 3–5%.
MP-GF30-PP is compounded on a co-rotating twin-screw extruder with 40:1 L/D ratio and 11.3 N·m/cm³ specific torque. Glass roving is introduced through a side feeder at barrel zone 6 of 12; vacuum degassing at −0.08 MPa removes volatile species. Underwater pelletization after a 10-bar water box yields a mean pellet diameter of 3.2 mm. Melt flow rate is tested against ISO 1133-1:2022 at 230 °C/2.16 kg; batch-to-batch standard deviation is controlled within 0.8 g/10 min.
Automotive intake support brackets molded from MP-GF30-PP are processed on 1,200-t hydraulic injection molding machines with 45 mm screw diameter and 1,200-t clamp force. Melt temperature is maintained at 225 °C ± 5 °C; mold temperature is 30 °C. The grade is pre-dried at 80 °C for 2 h only when storage relative humidity exceeds 60%; otherwise drying is not required. Under ISO 527-2, tensile modulus is 5,800 MPa and tensile stress at break is 92 MPa. Notched Charpy under ISO 179-1/1eA at 23 °C is 7.5 kJ/m². Compared with PA66-GF30, the grade reduces density from 1.36 g/cm³ to 1.12 g/cm³ and water absorption after 24 h immersion from 1.7% to 0.05% under ISO 62. The resulting bracket mass is typically 340 g versus 410 g for PA66-GF30, a 17% reduction. Thermo-oxidative degradation is the limiting boundary: melt temperature above 240 °C or residence time greater than 8 min at 225 °C causes chain scission and reduces notched Charpy by approximately 20%. Published data for long-term exposure of this specific coupled package to ethylene glycol coolant at 120 °C are limited; qualification testing under ISO 22088-2 is required before coolant contact is approved.
MP-FR-ABS is processed on electric injection molding machines with clamp force from 800 to 1,600 t. The barrel profile is set to feed 40 °C, compression 215 °C, metering 230 °C, and nozzle 235 °C. Screw speed is limited to 60 min⁻¹; back pressure is 0.5 MPa. The usable melt processing window is 220–240 °C. At melt temperature above 245 °C, the brominated epoxy package undergoes dehydrohalogenation. The resulting acid gas produces surface splay and can degrade the UL 94 vertical burn rating from V-0 at 1.5 mm to V-2 in high-shear gate regions. Melt viscosity at 1,000 s⁻¹ and 230 °C is 180 Pa·s; gate diameters below 1.2 mm produce unacceptable shear heating. The compound should be pre-dried at 80 °C for 4 h when ambient relative humidity exceeds 60%; maximum moisture content before molding is 0.02% by Karl Fischer titration. Compliance testing to IEC 60695-2-12 yields a glow-wire ignition temperature of 960 °C at 1.5 mm thickness for natural grade.
Power tool motor housings molded from MP-IM-PA66 require desiccant drying at 80 °C to moisture content below 0.10%. Drying time is 4 h at dew point −40 °C. Dry-as-molded notched Izod impact under ASTM D256 is 18 kJ/m² at 23 °C; after conditioning at 50% relative humidity the value moves to 10 kJ/m². Melt temperature is set to 285–300 °C and mold temperature to 80 °C. Rubber modifier content is 18–22 wt%; no mineral filler is present. Screw recovery time on a 500-t hydraulic machine is 12 s with shot weight 320 g.
Moisture content above 0.15% in MP-IM-PA66 before melt processing produces hydrolysis in the barrel. Apparent melt viscosity at 1,000 s⁻¹ drops from 120 Pa·s to 85 Pa·s, which alters fill pressure and reduces weld-line tensile strength by up to 30% in specimens tested under ISO 527-2. Shot-to-shot variation on a 500-t hydraulic machine increases from ±0.5 g to ±1.8 g when pellet surface moisture exceeds 0.20%. Desiccant drying at 80 °C and dew point −40 °C for 4 h restores moisture below 0.10%. Dew-point sensors should be located upstream of the drying hopper, not in the return air loop. The grade is not compatible with amine-based colorants or amine-containing mold-release agents at processing temperatures above 280 °C; amine attack accelerates molecular weight loss and surface delamination.
Thin-wall connectors molded from MP-FR-ABS at nominal wall thickness 0.8 mm require injection velocity of 120 mm/s and holding pressure of 80 MPa. Flow length-to-thickness ratio is 150:1; mold temperature is 40 °C. The compound retains UL 94 V-0 at 1.5 mm; at 0.8 mm the rating is V-1 in dark gray and black colorants. Contact with amine-catalyzed polyurethane foam is not recommended because amine species accelerate flame-retardant migration and reduce glow-wire ignition temperature under IEC 60695-2-12.
After 1,000 h at 85 °C/85% relative humidity, MP-FR-ABS retains 90% of tensile modulus under ISO 527-2; notched Charpy under ISO 179-1/1eA decreases from 11 kJ/m² to 7 kJ/m². Surface migration of the brominated flame-retardant package is monitored by solvent extraction using IEC 62321-7-2:2017; extractable bromine remains below 1,000 mg/kg in tested lots. The compound meets RoHS Directive 2011/65/EU Annex II restrictions for lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE, and no REACH SVHC exceeds 0.1% by mass.
| Regulatory requirement | Test method or clause | MP-GF30-PP | MP-IM-PA66 | MP-FR-ABS |
|---|---|---|---|---|
| RoHS Directive 2011/65/EU Annex II | IEC 62321-5:2013, IEC 62321-4:2013 | Pass for natural and carbon black grades with lot screening | Pass | Pass |
| REACH SVHC declaration | Article 33 | No SVHC above 0.1% w/w | No SVHC above 0.1% w/w | No SVHC above 0.1% w/w |
| UL 94 | UL 94 | HB at 1.5 mm | HB at 1.5 mm | V-0 at 1.5 mm |
| FDA 21 CFR 177.1520 | Olefin polymer compliance | Applicable only to PP matrix; glass fiber and coupling agent require end-use migration testing | Not claimed | Not claimed |
Contact between MP-FR-ABS and amine-catalyzed polyurethane foam cured at 70 °C for 500 h produced surface discoloration and loss of UL 94 V-0 in gated areas. The grade should therefore be physically separated from amine-containing foams or assembled only after full cure and post-cure bake-out.
