IRPC POLIMAXX HI630 HIPS

Product Overview

HI630 is a High Impact Polystyrene (HIPS) produced by the POLIMAXX® brand, a subsidiary of the IRPC Group (IRPC Public Company Limited) in Thailand. This material is presented in the form of opaque milky-white to pale yellow cylindrical pellets and belongs to the high-impact modified polystyrene blending system. Its core characteristics include achieving an Izod notched impact strength of 88 J/m through rubber-phase toughening, while maintaining a medium melt flow index of 6.5 g/10min to ensure processing fluidity. HI630 is specifically designed for injection molding and extrusion processes, and it is widely used in fields such as home appliance housings and consumer electronic structural components that require a comprehensive balance of surface gloss, rigidity, and drop impact resistance.

Technical Data Sheet (TDS)

Physical Properties

Mechanical Properties

Thermal Properties

Optical Properties

The technical data sheet (TDS) of HI630 HIPS material from IRPC corporation, if there are differences, please refer to the official website of IRPC.

Features & Benefits

• High Impact Toughness: The Izod notched impact strength reaches 88 J/m, and the rubber-phase dispersed structure effectively hinders crack propagation, making it suitable for products that must withstand handling drops or assembly stresses.

• Excellent Surface Gloss: With a 60° gloss value of 98, the material exhibits good surface wettability after melting, making it suitable for appliance panels and housings that require high decorative aesthetics.

• Balanced Rigidity and Processability: The combination of a 2350 MPa flexural modulus and a 6.5 g/10min melt flow index balances structural support requirements with the filling capacity for medium-walled products.

• Thermal Stability for General Conditions: An HDT of 90°C and a Vicat softening point of 95°C satisfy the internal temperature rise environments of conventional household appliances, maintaining stable performance in non-long-term high-temperature loading scenarios.

• Mature Process Adaptability: The material has moderate requirements for injection molding screw configurations and mold venting, making it suitable for large-scale continuous production with controllable yield rates.

Typical Applications

• Home Appliance Housings and Interiors: TV front bezels, washing machine control panels, air conditioner outlet louvers, refrigerator liner covers, etc., utilizing its high gloss and impact resistance.

• Consumer Electronic Structural Parts: Printer housings, copier side covers, audio equipment casings, set-top box housings, etc., balancing adhesion for EMI shielding coatings with structural strength.

• Office and Commercial Equipment: Cash register housings, vending machine panels, instrument/gauge covers, etc., adapted to environments involving frequent touch and light collisions.

• Toys and Daily Necessities: Large injection-molded toy casings, storage box lids, bathroom mirror cabinet backboards, etc., for products with comprehensive considerations for cost, safety, and drop resistance.

Frequently Asked Questions (FAQs)

Q1: What are the recommended drying conditions for HI630 HIPS before processing? Is mandatory drying necessary?

A1: The hygroscopicity of HIPS is lower than that of ABS or PA, but it may still absorb moisture after storage in high-humidity environments or long-term exposure. It is recommended to dry the material with hot air at 70–80°C for 2–3 hours before processing, controlling the moisture content below 0.1% to avoid silver streaks, bubbles, and uneven surface gloss. If the raw material is well-sealed and the ambient humidity is below 60%, the drying process may be shortened or omitted at one’s discretion, but the first mass-produced piece must be strictly inspected for appearance.

Q2: What are the main differences between HI630 and ABS in similar home appliance housing applications? How should one select the material?

A2: Compared to ABS, HI630 HIPS has a similar density but is usually lower in cost. The impact strength (especially impact toughness) of ABS is significantly higher than that of HIPS, and ABS possesses better chemical resistance (e.g., resistance to grease, gasoline) and surface hardness. If the application does not involve contact with strong solvents, is cost-sensitive, and requires high gloss, HIPS is more cost-effective. If higher structural strength, chemical resistance, or subsequent surface treatments (e.g., electroplating, painting) are required, ABS should be preferred.

Q3: Does this grade meet RoHS and UL certification requirements? What compliance documents can be provided?

A3: The base grade of HI630 HIPS complies with RoHS and REACH restricted substance requirements and possesses a UL 94 HB flammability rating (1.5 mm). TDS, MSDS/SDS, and COA can be provided for each batch. For specific customer industries (e.g., food contact or additional electronics/electrical directives), third-party test reports or declarations of conformity can be provided upon request, and it is recommended to clarify the regulatory boundaries of the end market during the project introduction phase.