The difference between two types of PS pellets: GPPS and HIPS

As we know, polystyrene is a recyclable material which can be recycled to make PS pellets. In recent years, with the increasing demand for regenerated pellets, we must have a better understanding of the types.

Polystyrene pellets can be divided into two main groups: GPPS–general purpose polystyrene and HIPS–high impact polystyrene.

What’s the difference between GPPS and HIPS?

General Purpose Polystyrene, also known as GPPS, is fully transparent and rigid, and it always serves as the raw material of food trays and building insulation. In the early days, the most common application of GPPS was found in CD cards. Apart from being FDA compliant, it is also low-cost, X-ray resistant, free from odor and taste, and easy to process.

High impact polystyrene, short for HIPS, has impact resistance and is characterized by opacity or transparency. It can be easily painted and glued. It is economical and easy to manufacture, but it is usually more expensive than GPPS. HIPS has matte effect and is the preferred material for thermal molding and a common use of HIPS is yogurt cups.

Although HIPS has higher impact strength, it is not as economically as GPPS, so that GPPS is usually the first choice for recycled raw materials. Recycled GPPS can sever as the raw material for XPS insulation, photo frames and even the food trays we used everyday.

INTCO, a general purpose polystyrene supplier, has a whole production line for GPPS recycling. Our company purchase the compacted and melted polystyrene waste from all over the world, we have strict quality control and inspection. In addition, we have adopted the professional granulating machine EREMMA, together with technical guidance. The pellets we made are of high-quality, competitive price and reliable sources.

The PS pellets industry has become an important industry. By recycling waste PS foam, granulation and reuse, it can help the world save much energy and reduce environmental pollution.

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