Bepex has licensed and installed hundreds of SSP (solid state polymerization) lines in the past 35 years with world-class customers. These solid state polymerization lines are producing a variety of high viscosity chips for the packaging and industrial yarn markets.

Versatility of our solid state polymerization lines as well as the diversity of what we are capable of supplying helps us find the best solution to our customers' needs.

As a technology supplier for the polymer industry, our experience with commodity products has prepared us to help our customer in the quickly changing polyester industry.

We design our own equipment, and constantly work to improve existing designs while developing new ones altogether in order to meet our customer's unique requirements. The applications of particular interest to the polyester producer are given below.

Crystallizing/Drying - Processing polyester chips normally starts with a crystallizing and drying step. This step is required in extruding the chips for spinning textile fiber, packaging film, injection molding bottles or solid state polymerizing. Bepex offers unique equipment and process technology solutions which are well proven, reliable and cost effective in this application. Process capacities can range from 25 kg/hr to 25,000 kg/hr.

Solid State Polymerizing - Solid State Polymerizing SSP consists of a series of processing steps including holding the chips at reaction temperatures and time periods to achieve the required increase in molecular weight in a reactor. Molecular weight (Mn) increases in the industry range from 2,000 to 20,000 and capacities range from 25 kg/hr to 30,000 kg/hr. Bepex offers specially designed reactors that provide plug-flow material handling combined with uniform gas distribution that is unmatched in the industry.

Dedusting/Cooling - The quality of the finished products such as fiber, film and bottles can be significantly impaired by the presence of dust in polyester chips. This dust is removed prior to packaging the crystallized or solid state polymerized chips. Bepex offers an efficient deduster which also functions as a chip cooler. Capacity ranges from 25 kg/hr to 30,000 kg/hr are available.

Gas Purification - Drying as well as solid state polymerizing polyester chips requires hot gas low in particulate matter, moisture and volatile organics. Since nitrogen is used in many instances, purifying and recycling the process gas is essential from the viewpoint of process economics and environmental protection. Bepex offers three types of gas purifications systems with capacities ranging from 500 Nm3/hr to 15,000 Nm3/hr.