Molder uses moisture analyzer to achieve clear containers

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Sartorius Corp. a maker of laboratory and process equipment, said E&R Manufacturing, a supplier of water filtration housings, uses its Mark 3 moisture analyzer for a new housing made of a copolyester resin processed by a combination of blow molding and compression molding.

The resin supplier had a recommended moisture specification of 0.020 percent moisture. Initially, E&R had mixed success making these clear containers. Sartorius brought in its Mark 3, and within minutes the company was running tests and getting the necessary moisture results.

E&R found that resin dried at or below 0.005 percent moisture produced clear, flawless parts that withstood pressure tests above 700 pounds per square inch.

Before getting the Mark 3, the company relied on measuring dew point, of the dryness of the air surrounding the resin pellets, but that was not accurate enough for the demanding application.

Sartorius is in Bohemia, NY.

Tel. 800-835-3211, email