Modified plastics refer to plastic products derived from general-purpose plastics and engineering plastics. They have undergone physical or chemical modification processes—such as filling, blending, and reinforcement. It significantly improves properties including flame retardancy, strength, impact resistance, and toughness. These modifications enable plastic components to meet the performance requirements of downstream manufacturers. They also offer advantages such as light weight, rich colour options, and excellent mouldability. Epic Powder Machinery is a leading global provider of ultra-fine grinding and precision classifying solutions. We help the produce high-quality polymer and functional powders with our advanced jet değirmeni and hava sınıflandırıcı değirmeni systems.
Research shows that for internal combustion engine vehicles, every 10% reduction in curb weight can reduce fuel consumption by 6–8% and cut emissions by about 4%. For electric vehicles, every 10 kg reduction in vehicle mass can increase driving range by approximately 2.5 km. Thanks to cost-performance ratio, weight-reduction effect, and excellent comprehensive properties, modified plastics have become a key material in automotive sector.
In terms of per-vehicle usage, Germany leads the world, with passenger cars using 340–410 kg of modified plastics on average (over 25% of vehicle plastic content). In China, the figure is only about 160 kg per passenger car with a utilization rate of just 13%. It’s significantly lower than the 250–310 kg seen in the United States. The most widely used modified plastics for automotive applications are PP, PUR, PA, PVC, ABS, and PC. PP, PA, and ABS dominate in variety and volume.
Modified plastics are extensively applied in interior and exterior trim parts, structural components, and functional parts. Interior parts include centre consoles, instrument panels, and decorative panels; exterior parts include grilles, bumpers, and trim strips. Structural parts include front-end modules and pillar frames. Functional parts include headlamps, intake manifolds, and fuel tanks.
Automotive Modified Polypropylene (PP)
PP is the lightest plastic available (density 0.89–0.91 g/cm³) and offers an excellent balance of performance and cost. It’s an ideal lightweight material for automobiles. More than 60 types of automotive components are made from modified PP, with bumpers, instrument panels, door inner panels, and air-conditioning components accounting for over 60% of total automotive PP consumption.
Typical modification cases and applications:
① Toughened and reinforced PP is produced by compounding elastomers (EPDM or POE) and inorganic fillers (talc, calcium carbonate, kaolin, etc.). It is widely used in large, high-impact parts such as bumpers and instrument panels. The new Škoda Scala uses Borealis’ newly developed low-density interior-grade PP Daplen EE058AI (10% talc-filled and elastomer-modified) for its instrument panel, glove box, and centre console, achieving a 6.5% weight reduction while delivering low odour, low emissions, and low fogging.
② Long-glass-fibre reinforced PP (LGFPP, fibre length 10–25 mm) offers superior creep resistance and 20–50% weight reduction compared with metals and thermoset composites. It is commonly used for front-end modules, instrument-panel carriers, battery trays, seat frames, and door modules. All-plastic front-end modules can reduce weight by 30–40% while integrating multiple metal parts into a single injection-moulded component.
③ Microcellular foamed PP, produced via chemical foaming agents and processes such as injection foaming, blow foaming, or extrusion foaming, creates 80–350 μm cells and reduces part weight by 10–20% (over 50% versus metal). SABIC has launched foamed mineral-filled PP grades (PPc F9005, F9007, F9015) for interior parts that maintain high surface quality while significantly reducing weight and achieving carbon-emission reductions of more than 15%.
④ Scratch-resistant PP is obtained by adding silicone or amide-based agents. Javachem HG, a high-performance ultra-high-molecular-weight silicone with special functional groups developed by Zhejiang Javachem, has passed certification by Volkswagen, GM, Toyota, and other OEMs. It provides long-lasting scratch resistance to PP interior parts, eliminates stickiness and yellowing under high-temperature light exposure, and avoids stress whitening.
| Plastic Material | Density (g/cm³) | Core Advantages | Main Limitations | Typical Applications |
| PP | 0.9~0.91 | Lightweight, Low Cost, Good Processability | Low-Temperature Brittleness, Poor Weatherability | Bumper, Instrument Panel, Storage Box |
| ABS | 1.05~1.1 | Excellent Surface Finish, Good Dimensional Stability | Poor Weatherability, Low Heat Resistance | Plated Parts, Instrument Cluster Covers, Control Panels |
| PC/ABS | 1.1~1.2 | Balanced Comprehensive Properties, High Heat Resistance | Relatively High Cost | High-end Instrument Panels, Airbag Covers |
| POM | 1.41~1.42 | High Wear Resistance, Excellent Mechanical Properties | Limited Temperature Resistance, High Shrinkage | Snap-fits, Gears, Lock Components |
| PE | 0.91~0.96 | Good Low-Temperature Resistance, Excellent Chemical Stability | Poor Heat Resistance, Low Mechanical Strength | Fuel Tanks, Floor Mats, Coolant Pipes |
| ASA | 1.05~1.1 | Excellent Weatherability, High Impact Strength | Relatively High Cost, Moderate Adhesion | Mirror Housings, Window Trim |
| PA6 | 1.13~1.15 | High Mechanical Strength, Wear & Oil Resistance | High Water Absorption, Poor Acid Resistance | Seatbelt Components, Gears, Grilles |
General Engineering Plastics (Heat Resistance ≤150°C) | Special Engineering Plastics (Heat Resistance >150°C)
With ever-higher performance and environmental requirements, automotive PP is moving toward “three highs and one low”: high flow (MFR > 20 g/10 min), high modulus (> 1800 MPa), high impact strength (> 25 kJ/m²), and low TVOC emissions.
Automotive Modified Polyamide (PA)
PA offers excellent mechanical properties, heat resistance, wear resistance, chemical resistance, and self-lubrication. PA6 and PA66 account for the majority of automotive PA, with more than half of global PA6/PA66 production used in vehicles.
Typical vakalar:
① 20–40% glass-fibre reinforced PA66 (PA66/GF) achieves flexural strength up to 310 MPa, notched impact strength ≈25.4 kJ/m², and low moulding shrinkage (0.3%). It is widely used for under-hood components such as engine covers, intake manifolds, and radiators.
② Halogen/antimony trioxide synergistic systems enable PA6 to reach UL94 V-0 flame retardancy, making it suitable for EV battery housings, brackets, and covers.
③ Low-water-absorption, high-strength PA11/PA12 modified with polymers or nano-fillers (montmorillonite, silica) is ideal for fuel and brake fluid lines.
Current R&D focuses on high-flow, high-heat, halogen-free flame-retardant PA to replace more metal parts while meeting stringent safety and environmental standards.
| Plastic Types | Type Characteristics | Applications （Parts） |
| PP | High crystallinity, regular structure, excellent mechanical properties, chemical stability, etc. | Bumper fascia, door sill scuff plate, tailgate cover, A/B/C pillar trim, door panel, center console frame, seat shield, instrument panel frame, etc. |
| PU | Excellent properties such as thermal insulation, sound insulation, elasticity, wear resistance, oil resistance, and water resistance. | Headliner, steering wheel, instrument panel, dashboard & interior trim, engine sound insulation material. |
| ABS, ABS/PC Alloy | Strong durability and corrosion resistance for plastic surface coating, a typical material suitable for automotive painting. | Steering wheel, door handle, gear shift knob, center console, grille, etc. |
| PC | Good transparency, mechanical properties, and weatherability; easy to dye and process. | Headlight cover, lamp cover, side window glass, panoramic sunroof, etc. |
| PE | High toughness, often used to manufacture transparent safety components in automobiles. | Blow-molded pipelines, fuel tanks, etc. |
| PA | Excellent low-temperature resistance, good chemical stability, easy to modify, etc. | Intake nozzle, camshaft cover, oil pan, intake manifold, etc. |
| PBT | High mechanical strength and modulus of elasticity, relatively low impact strength, good overall mechanical strength, heat resistance, etc. | High strength, outstanding chemical resistance, heat resistance, and excellent electrical properties; high crystallinity and high melting point. |
Automotive Modified ABS
ABS accoun,Lts for about 8% of total automotive plastics and is widely used for interior/exterior trim and structural parts thanks to its design flexibility and ease of plating, painting, and welding.
Typical alloy cases:
① ABS/PC: excellent flow, low-temperature impact, and heat resistance → instrument-panel carriers, trim strips, grilles
② ABS/PA: low density, high toughness, heat resistance → air vents, instrument panels, exterior parts
③ ABS/PVC: good low-temperature impact and flame retardancy → instrument panels, door seals
④ ABS/PBT: outstanding dimensional stability and chemical resistance → large parts such as instrument panels and bumpers
| Item | Component | Commonly Used Automotive Plastics |
| Exterior Parts | Mainly include bumpers (front/rear, inner liner), side skirts, rubbing strips, wheel arch liners, wheel cover trims, sills, radiator grilles, license plate panels, etc. | Bumper: ABS, Modified PP, PC/ABS Outside Mirror: ASA, Modified PP, Reinforced PA6, TPE Lens: Modified PC, PMMA Headlight Bezel: PC, PBT, PBT/PET Headlight Housing: PP+T40, PP+T20 Headlight Lens (Projector): Scratch-Resistant PC Headlight Reflector: PC, PBT, PPS, BMC Headlight Rear Cover: PC, EPDM Tail Light Lens: PMMA Tail Light Housing: Heat-Resistant ABS, PC/ABS, ASA Tail Light Inner Lens: PC Tail Light Bulb Holder: ABS Bulb Socket: PA+GF, PP+T20, PPA+GF, PPS Air Intake Grille: ABS, Modified PP, PC/ABS Wheel Arch Liner: PP+EPDM Wheel Hub Trim: PA6+Mineral Filler License Plate Panel: ABS, PC/ABS Side Skirt, Sill, Rubbing Strip: PP+30% Mineral Filler |
| Interior Parts | Mainly include instrument panel, center console, pillars, door panels, seats, etc. | Instrument Panel: PP+TALC, PC/ABS, PPO, PVC/ABS Sheet Instrument Panel Accessories: PP, ABS, PC/ABS, PP+EPDM+TALC Door Panel/Pillars: PP+EPDM+T20, PC, PC+ABS, TPO, PP+EPDM+T20 |
| Functional Parts | Mainly include front-end module, engine cover, intake manifold, air conditioning components, containers, fuel system, etc. | Air Conditioning Components: PP+T20, HDPE, LDPE Containers: High-Strength PP, PP Fuel Tank: PA11, PA12 Engine Cover: PA6+30%GF Cooling Fan: Hydrolysis-Resistant PA66+30%GF Fan Housing: PP+20%TALC Ventilation Duct: HDPE |
| Electronic Parts | Wiring harness, sensors, switches, ignition, etc. | Wiring Harness: PBT, PA6, PA66 Sensor: PBT+GF, PBT, PA6, PA66 Switch: PA, PC, PBT, PBT+GF |
Antibacterial, antistatic, and low-noise modified ABS are emerging trends as interiors move toward all-plastic designs.
Other Automotive Modified Plastics
In addition to the three aforementioned modified plastics with diverse properties and extensive applications in the automotive industry, the modification and specialized uses of PUR, PC, PE, and POM are also prominently showcased in vehicles.
| Category | Sub-Brand / Type | Product Characteristics | Specific Applications |
| Reinforced & Toughened Resins | Weather-Resistant Toughened PP Special Compound | Can significantly extend the service life of plastic materials under harsh outdoor climate conditions. | Outdoor unit casings for air conditioners, axial flow fan blades, and heater outlets. |
| Glass Fiber Reinforced Thermoplastics: Short Fiber Reinforced Thermoplastics, Long Fiber Thermoplastics, Thermoplastic Pultruded Composite Glass Fiber Reinforced Plastics | The mechanical properties of PP products can be improved by multiples or even several times through glass fiber reinforcement, making them comparable to ABS products with better heat resistance. | Computer components, mechanical parts, power tool and lighting parts. | |
| Plastic Alloys | PC Alloy Products | Improves the processing flowability of PC while combining its heat resistance to enhance performance. | Automotive instrument panels, computer and office automation equipment, etc. |
| PVC Alloy Products: PVC blended with CPE, NBR, ABS, MBS, etc. | Possess excellent flame retardancy and mechanical properties. | Home appliance casings, electrical switches, electric meter housings, building materials, etc. | |
| Polyester Alloy Products: PA, PBT, PET alloys, etc. | Integrate the characteristics of multiple resins to achieve high performance. | Automotive parts, home appliance parts, power tool parts, etc. | |
| Functional Masterbatches | High-Impact Polystyrene Toughened | Possesses the dimensional stability of general-purpose polystyrene, along with better impact strength and rigidity. | Housings and casings for electronic and electrical products, etc. |
| Flame Retardant Resins | Flame Retardant High-Impact Polystyrene Resin, Flame Retardant Polypropylene Resin, Flame Retardant ABS Resin, etc. | Through flame-retardant modification, plastic products can achieve UL94 V-0 rating and withstand 650°C or even 750°C glow wire without ignition. | TV casings, washing machine control panel bases, wire controller housings, refrigerator evaporator pans, ventilation ducts, etc. |
PUR: Low-VOC, flame-retardant foams and synthetic leather are used for bumper energy absorbers, door/roof fillers, and seat covers. NIO ES6 uses BASF Haptex® solvent-free PUR, offering superior durability and lower VOC than genuine leather.
PC: Usually alloyed (PC/PBT, PC/PET) for door frames and body panels; high-heat and optical-grade PC for lamps and windows.
PE: Multi-layer fuel tanks: HDPE + LLDPE adhesive + EVOH/PA barrier layers produced by co-extrusion blow moulding.
POM: Known as “super steel”, reinforced POM replaces metal in gears, bearings, window regulators, and wiper mechanisms. Duracon® series from Polyplastics POM offers excellent fatigue and wear resistance.
Modified plastics, with continuous innovation in performance, functionality, and environmental protection, have become a core material driving automotive lightweighting, electrification, and intelligence. As “carbon peak and carbon neutrality” goals accelerate, the application scope and volume of high-performance modified plastics in vehicles will continue to expand rapidly.
How Epic Powder’s Ultra-Fine Grinding Technology Empowers High-Performance Polymer Powders
Modified plastics have become one of the most important lightweight materials in modern automotive manufacturing. Every 10% reduction in vehicle weight can reduce fuel consumption by 6–8% for ICE vehicles and increase EV range by approximately 2.5 km for every 10 kg saved. The particle size, distribution and morphology of these powders directly determine compounding uniformity, dispersion, mechanical properties and final part appearance.
Epic Powder Machinery, as a leading global provider of ultra-fine grinding and precision classifying solutions, helps the world’s top compounding and masterbatch enterprises produce high-quality polymer and functional powders with our advanced jet mill and air classifier mill systems.
Real Production Cases from Epic Powder Customers
Ultra-fine PP powder for automotive compounds
Model: MQW20 Jet Mill
Material: Polypropylene (PP)
Target fineness: D50 = 5.1 μm
Stable capacity: 75.6 kg/h
Application: High-flow, low-VOC, scratch-resistant automotive interior PP compounds (instrument panels, door panels, centre consoles). The ultra-fine and narrow-distribution powder dramatically improves filler dispersion. It reduces tiger stripes and flow marks, and helps customers meet the latest OEM low-odour and low-fogging requirements.
PVC powder for automotive sealing strips and instrument panel skins
Model: MJW Air Classifier Mill (with ceramic protection)
Material: PVC resin
Target fineness: D50 = 53 μm
Capacity: 800–1200 kg/h (depending on formulation)
Advantage: Low heat generation during grinding, no gelation, perfect particle morphology, ensuring excellent plasticizer absorption and smooth extrusion/calendering surfaces.
Talc, CaCO₃ and wollastonite ultra-fine powders for automotive plastics
Using MQW series jet mills, we routinely achieve:
- Talc D50 2.5–6 μm → significantly increases rigidity and dimensional stability of PP/PA compounds
- CaCO₃ D50 3–8 μm → cost-effective reinforcement and impact modification
- Wollastonite D50 4–10 μm → excellent scratch resistance for TPO bumper compounds
Why Top Automotive Compounders Choose Epic Powder
- Contamination-free grinding (full ceramic lining available)
- Narrow particle size distribution (typical span < 1.5)
- Precise top-cut control – eliminates coarse particles that cause surface defects
- Lower energy consumption than traditional mechanical mills
- Laboratory-to-production seamless scale-up (MQW06 → MQW520 available)
- Global after-sales support and on-site process optimization
As the automotive industry moves rapidly toward electrification, intelligence and carbon neutrality, demand for high-performance, low-VOC and recyclable modified plastics will continue to soar. Epic Powder Machinery remains committed to providing the most advanced ultra-fine grinding and sınıflandırma technology. We help customers produce superior polymer powders that meet tomorrow’s stringent requirements today.
Ready to upgrade your automotive-grade powder production?
Contact Epic Powder now for free material testing and customised process solutions.
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