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    High-Impact Polystyrene (HIPS)

    High-Impact Polystyrene (HIPS) in Tradeasia

    IUPAC Name


    Cas Number


    HS Code




    Basic Info


    Solid, opaque material with a glossy surface

    Common Names

    Impact-Resistant Polystyrene (IRPS)


    25 kg PP Bag

    Brief Overview

    High-impact polystyrene (HIPS) is a thermoplastic polymer that is a blend of polystyrene and polybutadiene, giving it high-impact resistance and toughness. It is easily molded and formed into various shapes and sizes using processes like injection molding and extrusion, making it versatile and widely used in applications requiring strength, rigidity, and impact resistance, such as packaging, consumer goods, and electronic components. HIPS is affordable, easy to process, and can be easily colored or printed on. However, it has limitations in terms of resistance to certain chemicals and UV radiation. Overall, HIPS provides a balance of properties that make it a useful material in many different applications.

    Manufacturing Process

    The manufacturing process of high-impact polystyrene (HIPS) involves the polymerization of three monomers: styrene, butadiene, and ethylbenzene. The process typically involves the following steps:

    1. Monomer Preparation: The three monomers (styrene, butadiene, and ethylbenzene) are prepared separately and purified to remove any impurities.

    2. Polymerization: The monomers are then mixed together in a reactor vessel and heated to initiate the polymerization reaction. Typically, a free radical initiator such as benzoyl peroxide is added to the mixture to facilitate the reaction.

    3. Processing: Once the polymerization reaction is complete, the resulting HIPS material is processed into various forms such as pellets, sheets, or finished products using processes like extrusion or injection molding.

    4. Finishing: The finished HIPS product may then undergo additional processes such as cutting, machining, or surface treatment to achieve the desired properties or surface finish.


    High-impact polystyrene (HIPS) has a wide range of applications due to its unique properties, including high-impact strength, rigidity, and affordability. Some common applications of HIPS include:

    1. Packaging: HIPS is commonly used in packaging applications such as clamshells, food containers, and disposable cups due to its excellent impact resistance and ability to be easily formed into various shapes.

    2. Consumer goods: HIPS is used in various consumer goods such as toys, household appliances, and office supplies due to its affordability, ease of processing, and ability to be easily colored or printed on.

    3. Electronic components: HIPS is used in electronic components such as computer housings, TV cases, and keyboard keys due to its high strength and ability to be easily molded into complex shapes.

    4. Automotive parts: HIPS is used in various automotive parts such as interior trim, instrument panels, and exterior body panels due to its impact resistance and ability to be easily painted or coated.

    5. Medical devices: HIPS is used in medical devices such as trays, surgical instruments, and casings due to its ability to be easily sterilized and resistance to various chemicals.

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