Choosing the right CHIMEI POLYLAC ABS grade starts with the material’s chemistry and how those characteristics match your part requirements. This ABS resin family is an acrylonitrile–butadiene–styrene copolymer engineered as a practical range of grades — standard, high-impact, heat-resistant and specialty formulations — to suit industrial plastic applications.
The copolymer combines three monomers with distinct roles: styrene contributes rigidity and surface gloss, acrylonitrile improves chemical resistance and heat stability, and butadiene increases impact strength and low-temperature toughness. Understanding these contributions helps engineers and procurement teams translate performance needs into grade choices.
What you’ll learn in this guide: how to match grades to common applications, key properties to compare (impact, tensile, HDT, gloss), and practical processing and supply considerations to get reproducible parts at scale.
Matching CHIMEI ABS Grades by Application
Industrial applications impose distinct performance priorities—whether it is structural toughness, dimensional stability, premium surface appearance, or strict regulatory compliance. Selecting the right CHIMEI POLYLAC® ABS grade requires mapping these end-use priorities directly to specific resin properties.
Below is a practical selection framework, categorized by CHIMEI’s core performance families, designed to help procurement teams and engineers match their product requirements with proven industrial resin grades.
01General Purpose & High Gloss
Primary Focus: Excellent balance of processability, high mechanical strength, and a premium surface finish.
For consumer goods and household appliances where aesthetics and steady processing are paramount, CHIMEI’s standard and high-gloss variants serve as industry benchmarks. This category is anchored by POLYLAC® PA-757, which is widely recognized as the industry gold standard for general-purpose ABS due to its exceptional gloss, high rigidity, and stable mold shrinkage.
- Typical Applications: Computer and laptop housings, TV bezels, keyboard keycaps, high-end toys, audio equipment enclosures, and structural appliance panels.
- Key Material Properties: Well-balanced Melt Flow Rate (MFR), high surface hardness, and excellent color stability for secondary operations like painting or electroplating.
- Processing & Design Tip: To achieve a flawless high-gloss finish without visible weld lines or silver streaks, maintain mold temperatures between 60℃ and 80℃ and ensure uniform wall thicknesses to prevent sink marks. Pre-drying the resin at 80℃ for 2–3 hours is essential to eliminate residual moisture.
02High Impact
Primary Focus: Maximum energy absorption, low-temperature toughness, and robust crack resistance.
When finished parts must withstand severe mechanical stress, sudden impact shocks, or accidental drops, high-impact formulations are required. POLYLAC® PA-747 stands out in this segment, offering ultra-high impact strength and superior elongation at break, making it ideal for heavy-duty structural components.
- Typical Applications: Safety helmets, sporting goods, power tool housings, vacuum cleaner casings, lawnmower decks, and automotive exterior trim pieces.
- Key Material Properties: Exceptional notched Izod impact strength (even at sub-zero temperatures) and high fatigue resistance.
- Processing & Design Tip: High-impact grades generally exhibit lower melt flow compared to general-purpose resins. Engineers should design wider gates and runners to reduce shear stress during injection. Incorporate generous radius blends (avoiding sharp internal corners) in the part design to distribute stress and maximize the material’s impact efficiency.
03Flame Retardant
Primary Focus: Strict fire safety compliance, thermal stability, and electrical insulation.
For components enclosing live electrical currents or deployed in public infrastructure, safety regulations demand materials that suppress combustion. CHIMEI’s flame-retardant (FR) lineup, including industry staples like POLYLAC® PA-765A (offering a balanced property profile) and PA-764 (optimized for higher performance), meets stringent UL94 standards down to V-0 and 5VA ratings.
- Typical Applications: EV charging station enclosures, power adapters, switch panels, internal components for large appliances (washing machines, refrigerators), and office automation equipment housings.
- Key Material Properties: Certified UL94 V-0 / 5VA flammability ratings, high glow-wire ignition temperature (GWIT), and excellent thermal stability during processing.
- Processing & Design Tip: Flame-retardant additives are sensitive to overheating, which can cause material degradation, gassing, or cosmetic discoloration (such as “black streaks”). Keep the barrel residence time short and maintain processing temperatures below 240℃. Ensure the mold features robust venting slots to allow gases to escape safely.
04Heat Resistant
Primary Focus: High Vicat softening point, low thermal deformation under load, and dimensional stability.
Components exposed to elevated operating environments—either under the hood of a vehicle or within heat-generating appliances—require resins that maintain their mechanical rigidity without warping. CHIMEI’s heat-resistant series, such as POLYLAC® PA-777D (highly favored in automotive interiors for its low odor and low VOC emissions) and PA-754, deliver elevated Heat Deflection Temperatures (HDT).
- Typical Applications: Automotive interior trim (instrument panel components, air vent louvers), rearview mirror housings, coffee maker bodies, microwave oven trims, and hair dryer enclosures.
- Key Material Properties: High Vicat softening temperature, low coefficient of linear thermal expansion (CLTE), and high creep resistance under thermal load.
- Processing & Design Tip: Heat-resistant ABS requires higher processing and mold temperatures to ensure proper cavity filling and to minimize molded-in stress. Mold temperature should be set near the higher recommended limit (80℃ – 90℃) to prevent post-molding shrinkage or thermal warpage when the part encounters actual working conditions.
| POLYLAC® ABS Category | Benchmark Grades | Core Performance Metric | Top Target Application |
| General Purpose & Gloss | PA-757, PA-717C | Surface Aesthetics & Processability | Appliance Housings, Consumer Electronics |
| High Impact | PA-747, PA-707 | Toughness & Energy Absorption | Safety Helmets, Industrial Tool Casings |
| Flame Retardant | PA-765A, PA-764 | UL94 V-0 / 5VA Fire Safety | EV Chargers, Electrical Enclosures |
| Heat Resistant | PA-777D, PA-754 | High Vicat Softening Point | Automotive Interiors, High-Power Appliances |
Looking for sustainable polymer solutions? We also supply CHIMEI’s Ecologue™ D-1200 and D-2400 PCR ABS to help reduce your product’s carbon footprint.
Need Help Selecting the Right Grade?
Our materials specialists will provide a recommended grade shortlist, technical data sheets and sample availability based on your application, processing equipment and performance targets.
Technical Comparison Matrix: Key Properties at a Glance
Choosing the right CHIMEI POLYLAC® ABS grade requires a direct comparison of quantifiable physical properties. The matrix below maps CHIMEI’s core flagships—PA-757 (General Purpose/High Gloss), PA-747 (High Impact), PA-765A (Flame Retardant), and PA-777D (Heat Resistant)—against key performance metrics to streamline your material selection process.
POLYLAC® ABS Core Grades Physical Property Comparison
Standard CHIMEI POLYLAC ABS grades are general-purpose resins that balance strength, processability and surface appearance for high-volume products. Expect moderate tensile strength and hardness, good chemical resistance for everyday exposure, acceptable gloss for consumer parts, and melt flow ranges suited to efficient injection cycles.
When to pick a standard grade: parts that need reliable performance at competitive cost — enclosures, trim and appliance components where extreme toughness or very high heat resistance is not required.
| Property | Standard Grade | High Impact | Heat Resistant | High Rigidity |
| Tensile Strength (MPa) | 40-45 | 35-40 | 45-50 | 50-55 |
| Impact Strength (kJ/m²) | 15-20 | 30-40 | 12-18 | 10-15 |
| Heat Deflection Temp (°C) | 85-90 | 80-85 | 100-105 | 90-95 |
| Surface Gloss (60°) | 85-90 | 75-80 | 80-85 | 90-95 |
| Melt Flow Rate (g/10min) | 15-25 | 10-20 | 12-22 | 8-18 |
| Chemical Resistance | Good | Good | Excellent | Very Good |
Note: The values listed above represent typical resin property ranges for injection molding grades based on standard ASTM testing methods. For exact batch specifications, certified Technical Data Sheets (TDS), or regulatory compliance certs, please contact our technical sales team.
Quick Interpretive Guide for Procurement & Engineering
When to Specify POLYLAC® PA-757: Choose this grade as your default benchmark for consumer housings. It delivers the highest surface hardness (Rockwell R-115) and gloss, paired with excellent fluid mobility (MFR up to 23 g/10min) for high-speed, multi-cavity production cycles.
When to Specify POLYLAC® PA-747: When your product demands extreme mechanical durability and drop-proof performance. While it sacrifices a marginal amount of surface hardness and flowability due to higher butadiene content, it raises notched impact toughness to an industry-leading 34–38 kg·cm/cm.
When to Specify POLYLAC® PA-765A: Mandatory for electronic housings, terminal blocks, or enclosures requiring certified UL94 V-0 flame retardancy without compromising stable injection behaviors.
When to Specify POLYLAC® PA-777D: Engineered specifically for automotive interiors and high-heat appliances. It offers an elevated HDT range (up to 94°C) along with strict low-odor and low-emission (Low VOC) characteristics required by major OEMs.
Injection Molding Processing Guide: How to Avoid Defects
Successful injection molding of CHIMEI POLYLAC ABS requires precise control over three critical process variables: material preparation, thermal profiling, and cavity pressure management. Optimizing these parameters ensures parts achieve full mechanical performance and a premium surface finish without cosmetic flaws.
Drying Process & Moisture Control
ABS is inherently hygroscopic and readily absorbs atmospheric moisture. Processing wet resin leads to hydrolytic degradation and severe cosmetic flaws. When trapped moisture encounters high heat inside the barrel, it turns into superheated steam, which is sheared along the mold surface during injection, resulting in silver streaks (splay marks) and brittle parts.
- Drying Protocol: Pre-dry all POLYLAC ABS grades at 80℃ for 2 to 4 hours using a desiccant hopper dryer.
- Target Moisture: Ensure the residual moisture content is below 0.05% before charging the screw.
- Shop Floor Tip: Avoid simple hot-air ambient dryers in humid environments; consistent dew-point control (-40℃ or lower) is vital to guarantee zero silver streaking on high-gloss or flame-retardant parts.
Processing Temperature Profiles
Achieving a homogenous melt without causing thermal degradation requires a progressive temperature profile across the injection molding machine’s barrel and mold.
| Zone | Temperature Range (°C) | Purpose |
| Feed Throat | 40-60 | Prevent premature melting and bridging |
| Rear Zone | 180-200 | Initial melting and plastication |
| Middle Zone | 200-220 | Complete melting and homogenization |
| Front Zone | 210-230 | Maintain melt temperature stability |
| Nozzle | 220-240 | Ensure optimal flow into mold cavity |
Processing Tip: When switching between CHIMEI POLYLAC ABS grades, perform a full purge cycle, then stabilize temperatures gradually; document purge volume and temperature changes for reproducibility.
Defect Troubleshooting: Pressures & Temperatures
When running POLYLAC ABS, processing adjustments can quickly resolve the two most common structural and cosmetic issues: Weld Lines and Sink Marks.
A. Eliminating Weld Lines
Weld lines occur where two split melt fronts meet but fail to fuse completely due to low localized temperature or insufficient pressure.
Actionable Fixes:
- Increase Melt & Mold Temperatures: Raise the nozzle temperature by 5℃ – 10℃ and elevate the mold temperature to keep the flow fronts molten during contact.
- Adjust Flow Kinetics: Increase injection speed to shorten fill time, and step up injection/holding pressure to force the fronts together for stronger molecular entanglement.
B. Eliminating Sink Marks
Sink marks appear in thick sections, ribs, or bosses because the core cools slower than the frozen skin, pulling the surface inward.
Actionable Fixes:
- Optimize Holding Pressure & Time: Increase pack and hold pressures to force extra material into the cavities to compensate for volumetric shrinkage. Extend hold time until the gate completely freezes off.
- Thermal Control: Lower the melt temperature slightly to reduce total thermal contraction, and ensure effective cooling channel layouts in thick part zones.
| Common Defect | Primary Root Cause | Primary Process Correction | Secondary Process Correction |
| Silver Streaks (Splay) | Residual moisture or overheat | Extend drying time at 80°C | Lower barrel temperature |
| Weld Lines | Cold flow fronts / low packing | Boost injection speed & mold temp | Increase hold pressure |
| Sink Marks | Insufficient volumetric packing | Increase hold pressure & hold time | Lower melt temperature |
For hands-on assistance, contact our technical team — we provide on-site troubleshooting, setup audits, and parameter optimization to reduce start-up defects and speed qualification for production equipment.
Securing Reliable Supply: Why Partner with Us for CHIMEI ABS Resins
Resin shortages, delayed shipments, or volatile material lots can halt your production overnight. As your dedicated global supply partner, we eliminate these supply chain risks by bridging the gap between rigid petrochemical plant schedules and your actual factory-floor requirements.
100% Original Resins & Full Traceability
- Zero Compromise: We supply exclusively 100% original prime granules in original factory-sealed packaging. No off-grades, no sub-prime lots, and no unauthorized regrinds.
- Complete Compliance: Every shipment is backed by authentic Certificates of Analysis (COA) traceable to original factory batches. Complete RoHS, REACH, and UL certifications are provided instantly upon request to ensure seamless global customs and regulatory clearance.
Flexible MOQs & Constant Buffer Stocks
- Overcoming High MOQs: We resolve the operational strain of high Minimum Order Quantities and long lead times typically imposed by major chemical plants, offering flexible volume allocations to optimize your cash flow.
- Immediate Availability: To insulate your production from market shortfalls, we maintain a robust, ready-to-ship rolling buffer stock of high-demand flagship grades, including POLYLAC PA-757 and PA-747.
Strategic Logistics & Shanghai Port Proximity
- The Hub Advantage: Strategically located directly adjacent to premier international shipping infrastructure and global ocean hubs like Shanghai Port, we drastically cut down inland transit times.
- Fast-Track Freight: This geographical placement guarantees rapid container positioning, expedited export customs clearance, and prioritized booking with major ocean liners, delivering predictable and highly cost-effective international logistics.
Technical Services Include: grade selection consultation, processing parameter development, defect analysis, material testing coordination, regulatory compliance documentation and new product development support.
Conclusion
Selecting the right CHIMEI POLYLAC ABS grade means matching material properties to your application: prioritize impact resistance where drop or low-temperature toughness matters, choose heat-resistant grades where elevated HDT and dimensional stability are required, and specify surface/gloss characteristics for visible products. Clear property targets (impact, tensile, HDT, gloss) make grade comparisons and testing faster.
Processing discipline is equally important — proper drying, controlled temperature profiles and optimized cycle times preserve resin properties and prevent defects, keeping production efficient and repeatable. Design and tooling choices (uniform wall thickness, balanced gates, effective cooling) directly reduce warpage, sink and other dimensional problems.
- Pick grades by application requirements, not price alone — this reduces rework and warranty risk.
- Validate processing parameters (drying, barrel/mold temperatures, cooling) on your equipment before full-scale runs.
- Secure supply and technical support to lower total cost of ownership and accelerate qualification.
Ready to move forward? Please contact us to request a grade consultation, download TDS, or order samples — our team can provide test data, processing recommendations and sample shipments to support your product development and production schedules.